undefect. CWE-407 — 63 sites patched across 27 ecosystems

Authors: russell@unturf.com · brackishbert@gmail.com · foxhop.net · TimeHexOn.com

Patches, unit tests, benchmarks, whitepaper, and outreach briefs.
Public domain — no copyright claimed. Use freely.

test/jdk/java/lang/StackWalker/AcrossThreads.java

@@ -0,0 +1,227 @@
+/*
+ * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * @test
+ * @bug 8143214
+ * @summary Verify that StackWalker works well when one instance of StackWalker
+ *          is used by several threads sequentially or concurrently.
+ * @run testng AcrossThreads
+ */
+
+import java.util.ArrayList;
+import java.util.EnumSet;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+import java.lang.StackWalker.StackFrame;
+import static java.lang.StackWalker.Option.*;
+
+import org.testng.annotations.*;
+import static org.testng.Assert.*;
+
+public class AcrossThreads {
+    static final StackWalker WALKERS[] = new StackWalker[] {
+            StackWalker.getInstance(RETAIN_CLASS_REFERENCE),
+            StackWalker.getInstance(EnumSet.of(SHOW_REFLECT_FRAMES, RETAIN_CLASS_REFERENCE)),
+            StackWalker.getInstance(EnumSet.of(SHOW_HIDDEN_FRAMES, RETAIN_CLASS_REFERENCE))
+    };
+
+    @DataProvider
+    public StackWalker[][] walkerProvider() {
+        return new StackWalker[][] {
+                new StackWalker[] { WALKERS[0] },
+                new StackWalker[] { WALKERS[1] },
+                new StackWalker[] { WALKERS[2] }
+        };
+    }
+
+    @Test(dataProvider = "walkerProvider")
+    public void test(StackWalker walker) {
+        Thread t1 = new T1(walker);
+        // call methods of one instance of StackWalker sequentially in T1, T2, T3.
+        t1.start();
+        try {
+            t1.join();
+        } catch (InterruptedException e) { }
+
+        List<Thread> threads = new ArrayList<Thread>();
+        for (int i = 0; i < 100; i++) {
+            threads.add(new T1(walker));
+            threads.add(new T2(walker));
+            threads.add(new T3(walker));
+        }
+        // call methods of one instance of StackWalker concurrently in several threads.
+        threads.parallelStream().forEach(t -> {
+            t.setDaemon(true);
+            t.start();
+        });
+        threads.parallelStream().forEach(t -> {
+            try {
+                t.join();
+            } catch (InterruptedException e) { }
+        });
+    }
+
+    interface Consumer {
+        final int LOOPS = 5;
+
+        public void consume();
+
+        default public void assertWalker(StackWalker walker, int n) {
+            if (--n == 0) {
+                Map<String, Integer> methods = new HashMap<String, Integer>();
+                walker.forEach(f -> {
+                    Integer i = methods.putIfAbsent(f.getMethodName(), 1);
+                    if (i != null) {
+                        methods.put(f.getMethodName(), i + 1);
+                    }
+                });
+
+                // verify that walker.forEach(...) reaches the specified methods.
+                assertTrue(methods.get("consume") == 1);
+                assertTrue(methods.get("run") == 1);
+                assertTrue(methods.get("assertWalker") == LOOPS);
+
+                // verify that walker.walk(...) reaches the specified methods.
+                assertTrue(walker.walk(s -> s.map(StackFrame::getMethodName)
+                                             .filter(mn -> mn.equals("consume"))
+                                             .count()) == 1);
+                assertTrue(walker.walk(s -> s.map(StackFrame::getMethodName)
+                                             .filter(mn -> mn.equals("run"))
+                                             .count()) == 1);
+                assertTrue(walker.walk(s -> s.map(StackFrame::getMethodName)
+                                             .filter(mn -> mn.equals("assertWalker"))
+                                             .count()) == LOOPS);
+            } else {
+                assertWalker(walker, n);
+            }
+        }
+    }
+
+    class T1 extends Thread implements Consumer {
+        final StackWalker walker;
+
+        public T1(StackWalker walker) {
+            this.walker = walker;
+        }
+
+        public void run() {
+            consume();
+
+            Thread t2 = new T2(walker);
+            t2.start();
+            try {
+                t2.join();
+            } catch (InterruptedException e) { }
+
+            consume();
+        }
+
+        public void consume() {
+            assertWalker(walker, LOOPS);
+
+            // verify walker.walk() reaches T1 class through methods run() and consume().
+            assertTrue(walker.walk(s -> s.filter(f -> T1.class == f.getDeclaringClass())
+                                         .count()) == 2);
+
+            assertCallerClass(walker);
+            assertEquals(T1.class, walker.getCallerClass());
+        }
+    }
+
+    class T2 extends Thread implements Consumer {
+        final StackWalker walker;
+
+        public T2(StackWalker walker) {
+            this.walker = walker;
+        }
+
+        public void run() {
+            consume();
+
+            Thread t3 = new T3(walker);
+            t3.start();
+            try {
+                t3.join();
+            } catch (InterruptedException e) { }
+
+            consume();
+        }
+
+        public void consume() {
+            assertWalker(walker, LOOPS);
+
+            // verify walker.walk() reaches T2 class through methods run() and consume().
+            assertTrue(walker.walk(s -> s.filter(f -> T2.class == f.getDeclaringClass())
+                                         .count()) == 2);
+            // verify T1 is not reached, even if call is invoked
+            // from test()->T1.start()->T1.run()->T2
+            assertTrue(walker.walk(s -> s.filter(f -> T1.class == f.getDeclaringClass())
+                                         .count()) == 0);
+
+            assertCallerClass(walker);
+            assertEquals(T2.class, walker.getCallerClass());
+        }
+    }
+
+    class T3 extends Thread implements Consumer {
+        final StackWalker walker;
+
+        public T3(StackWalker walker) {
+            this.walker = walker;
+        }
+
+        public void run() {
+            consume();
+        }
+
+        public void consume() {
+            assertWalker(walker, LOOPS);
+
+            // verify walker.walk() reaches T1 class through methods run() and consume().
+            assertTrue(walker.walk(s -> s.filter(f -> T3.class == f.getDeclaringClass())
+                                         .count()) == 2);
+            // verify T1, T2 is not reached, even if call is invoked
+            // from test() -> T1.start() -> T1.run() -> T2.start() -> T2.run() -> T3
+            assertTrue(walker.walk(s -> s.filter(f -> T2.class == f.getDeclaringClass())
+                                         .count()) == 0);
+            assertTrue(walker.walk(s -> s.filter(f -> T1.class == f.getDeclaringClass())
+                                         .count()) == 0);
+
+            assertCallerClass(walker);
+            assertEquals(T3.class, walker.getCallerClass());
+        }
+    }
+
+    static void assertCallerClass(StackWalker walker) {
+        // verify walker.getCallerClass() get the expected class.
+        call(walker);
+    }
+
+    static void call(StackWalker walker) {
+        Class<?> c = walker.getCallerClass();
+        assertEquals(c, AcrossThreads.class);
+    }
+}

test/jdk/java/lang/StackWalker/Basic.java

@@ -0,0 +1,235 @@
+/*
+ * Copyright (c) 2015, 2020, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * @test
+ * @bug 8140450 8173898
+ * @summary Basic test for the StackWalker::walk method
+ * @run testng Basic
+ */
+
+import java.lang.StackWalker.StackFrame;
+import java.lang.invoke.MethodType;
+import java.util.List;
+import java.util.Map;
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
+import static java.lang.StackWalker.Option.*;
+
+import org.testng.annotations.DataProvider;
+import org.testng.annotations.Test;
+import static org.testng.Assert.*;
+
+public class Basic {
+    private static boolean verbose = false;
+
+    @DataProvider(name = "stackDepths")
+    public static Object[][] stackDepths() {
+        return new Object[][] {
+                { new int[] { 12 },  new int[] { 4, 8, 12}      },
+                { new int[] { 18 },  new int[] { 8, 16, 20}     },
+                { new int[] { 32 },  new int[] { 16, 32, 64}    },
+        };
+    }
+
+    /**
+     * For a stack of a given depth, it creates a StackWalker with an estimate.
+     * Test walking different number of frames
+     */
+    @Test(dataProvider = "stackDepths")
+    public static void test(int[] depth, int[] estimates) {
+        Basic test = new Basic(depth[0]);
+        for (int estimate : estimates) {
+            test.walk(estimate);
+        }
+    }
+
+    @Test
+    public static void testWalkFromConstructor() throws Exception {
+        System.out.println("testWalkFromConstructor:");
+        List<String> found = ((ConstructorNewInstance)ConstructorNewInstance.class.getMethod("create")
+                             .invoke(null)).collectedFrames();
+        assertEquals(List.of(ConstructorNewInstance.class.getName()+"::<init>",
+                             ConstructorNewInstance.class.getName()+"::create",
+                             Basic.class.getName()+"::testWalkFromConstructor"),
+                     found);
+    }
+
+    @Test
+    public static void testMethodSignature() throws Exception {
+        List<StackFrame> frames = new StackBuilder(16, 16).build();
+        Map<String, MethodType> methodTypes = StackBuilder.methodTypes();
+        for (StackFrame f : frames) {
+            MethodType type = methodTypes.get(f.getMethodName());
+            if (type != null) {
+                System.out.format("%s.%s %s%n", f.getClassName(), f.getMethodName(),
+                                  f.getDescriptor());
+
+                String descriptor = f.getDescriptor();
+                if (!descriptor.equals(type.toMethodDescriptorString())) {
+                    throw new RuntimeException("Expected: " + type.toMethodDescriptorString()
+                        + " got: " + f.getDescriptor());
+                }
+
+                if (!f.getMethodType().equals(type)) {
+                    throw new RuntimeException("Expected: " + type
+                        + " got: " + f.getMethodType());
+                }
+
+                // verify descriptor returned by getDescriptor() before and after
+                // getMethodType() is called
+                if (!descriptor.equals(f.getDescriptor())) {
+                    throw new RuntimeException("Mismatched: " + descriptor
+                        + " got: " + f.getDescriptor());
+                }
+            }
+        }
+    }
+
+    private final int depth;
+    Basic(int depth) {
+        this.depth = depth;
+    }
+
+    /** For TestNG */
+    public Basic() {
+        depth = 0;
+    }
+
+    /*
+     * Setup a stack builder with the expected stack depth
+     * Walk the stack and count the frames.
+     */
+    void walk(int estimate) {
+        int limit = Math.min(depth, 16);
+        List<StackFrame> frames = new StackBuilder(depth, limit).build();
+        System.out.format("depth=%d estimate=%d expected=%d walked=%d%n",
+                          depth, estimate, limit, frames.size());
+        assertEquals(limit, frames.size());
+    }
+
+    static class ConstructorNewInstance {
+        static final StackWalker walker =
+            StackWalker.getInstance(StackWalker.Option.RETAIN_CLASS_REFERENCE);
+        List<String> testFramesOrReflectionFrames;
+        public ConstructorNewInstance() {
+            testFramesOrReflectionFrames = walker.walk(this::parse);
+        }
+        public List<String> collectedFrames() {
+            return testFramesOrReflectionFrames;
+        }
+        public boolean accept(StackFrame f) {
+            // Frames whose class names don't contain "."
+            // are our own test frames. These are the ones
+            // we expect.
+            // Frames whose class names contain ".reflect."
+            // are reflection frames. None should be present,
+            // since they are supposed to be filtered by
+            // by StackWalker. If we find any, we want to fail.
+            if (!f.getClassName().contains(".")
+                || f.getClassName().contains(".reflect.")) {
+                System.out.println("    " + f);
+                return true;
+            }
+            // Filter out all other frames (in particular
+            // those from the test framework) in order to
+            // have predictable results.
+            return false;
+        }
+        public String frame(StackFrame f) {
+            return f.getClassName() + "::" + f.getMethodName();
+        }
+        List<String> parse(Stream<StackFrame> s) {
+            return s.filter(this::accept)
+                    .map(this::frame)
+                    .collect(Collectors.toList());
+        }
+        public static ConstructorNewInstance create() throws Exception {
+            return ConstructorNewInstance.class.getConstructor().newInstance();
+        }
+    }
+
+    static class StackBuilder {
+        private final int stackDepth;
+        private final int limit;
+        private int depth = 0;
+        private List<StackFrame> result;
+        StackBuilder(int stackDepth, int limit) {
+            this.stackDepth = stackDepth; // build method;
+            this.limit = limit;
+        }
+        List<StackFrame> build() {
+            trace("build");
+            m1();
+            return result;
+        }
+        void m1() {
+            trace("m1");
+            m2();
+        }
+        List m2() {
+            trace("m2");
+            m3();
+            return null;
+        }
+        int m3() {
+            trace("m3");
+            m4(null);
+            return 0;
+        }
+        void m4(Object o) {
+            trace("m4");
+            int remaining = stackDepth-depth-1;
+            if (remaining >= 4) {
+                m1();
+            } else {
+                filler(remaining);
+            }
+        }
+        void filler(int i) {
+            trace("filler");
+            if (i == 0)
+                walk();
+            else
+                filler(--i);
+        }
+
+        void walk() {
+            StackWalker walker = StackWalker.getInstance(RETAIN_CLASS_REFERENCE);
+            result = walker.walk(s -> s.limit(limit).collect(Collectors.toList()));
+        }
+        void trace(String methodname) {
+            ++depth;
+            if (verbose)
+                System.out.format("%2d: %s%n", depth, methodname);
+        }
+
+        static Map<String, MethodType> methodTypes() throws Exception {
+            return Map.of("m1", MethodType.methodType(void.class),
+                          "m2", MethodType.methodType(List.class),
+                          "m3", MethodType.methodType(int.class),
+                          "m4", MethodType.methodType(void.class, Object.class));
+        }
+    }
+
+}

test/jdk/java/lang/StackWalker/CallerFromMain.java

@@ -0,0 +1,137 @@
+/*
+ * Copyright (c) 2015, 2025, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * @test
+ * @bug 8140450
+ * @summary Test if the getCallerClass method returns empty optional
+ * @requires test.thread.factory == null
+ * @library /test/lib
+ * @run main CallerFromMain exec
+ */
+
+import jdk.test.lib.process.ProcessTools;
+import jdk.test.lib.process.OutputAnalyzer;
+
+public class CallerFromMain {
+
+    private static final StackWalker sw = StackWalker.getInstance(StackWalker.Option.RETAIN_CLASS_REFERENCE);
+    public static void main(String[] args) throws Exception {
+        if (args.length > 0) {
+            ProcessBuilder pb = ProcessTools.createTestJavaProcessBuilder("CallerFromMain");
+            OutputAnalyzer output = ProcessTools.executeProcess(pb);
+            System.out.println(output.getOutput());
+            output.shouldHaveExitValue(0);
+            return;
+        }
+
+        // StackWalker::getCallerClass
+        // CallerFromMain::main
+        // no caller
+        try {
+            Class<?> c = sw.getCallerClass();
+            throw new RuntimeException("UOE not thrown. Caller: " + c);
+        } catch (IllegalCallerException e) {}
+
+        // StackWalker::getCallerClass
+        // Runnable::run
+        // Thread::run
+        Thread t1 = new Thread(new Runnable() {
+            @Override
+            public void run() {
+                Class<?> c = sw.getCallerClass();
+                System.out.println("Call from Thread.run: " + c);
+                assertThreadClassAsCaller(c);
+            }
+        });
+        t1.setDaemon(true);
+        t1.start();
+
+        // StackWalker::getCallerClass
+        // CallerFromMain::doit
+        // Thread::run
+        Thread t2 = new Thread(CallerFromMain::doit);
+        t2.setDaemon(true);
+        t2.start();
+
+        // StackWalker::getCallerClass
+        // MyRunnable::run
+        // Thread::run
+        Thread t3 = new Thread(new MyRunnable());
+        t3.setDaemon(true);
+        t3.start();
+
+        // StackWalker::getCallerClass
+        // Runnable::run
+        // MyThread::run
+        Thread t4 = new MyThread(new Runnable() {
+            @Override
+            public void run() {
+                Class<?> c = sw.getCallerClass();
+                System.out.println("Call from MyThread.run: " + c);
+                if (c != MyThread.class) {
+                    throw new RuntimeException("Expected MyThread.class but got " + c);
+                }
+            }
+        });
+        t4.setDaemon(true);
+        t4.start();
+
+        t1.join();
+        t2.join();
+        t3.join();
+        t4.join();
+    }
+
+    static class MyThread extends Thread {
+        final Runnable runnable;
+        MyThread(Runnable runnable) {
+            super("MyThread");
+            this.runnable = runnable;
+        }
+        public void run() {
+            runnable.run();
+        }
+    }
+
+    static class MyRunnable implements Runnable {
+        @Override
+        public void run() {
+            Class<?> c = sw.getCallerClass();
+            System.out.println("Call from Thread::run: " + c);
+            assertThreadClassAsCaller(c);
+        }
+     }
+
+    static void doit() {
+        Class<?> c = sw.getCallerClass();
+        System.out.println("Call from CallerFromMain.doit: " + c);
+        assertThreadClassAsCaller(c);
+    }
+
+    static void assertThreadClassAsCaller(Class<?> caller) {
+        if (caller != Thread.class) {
+            throw new RuntimeException("Expected Thread.class but got " + caller);
+        }
+    }
+}

test/jdk/java/lang/StackWalker/CallerSensitiveMethod/Main.java

@@ -0,0 +1,36 @@
+/*
+ * Copyright (c) 2016, 2024, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * @test
+ * @bug 8157464 8210375
+ * @summary Basic test for StackWalker.getCallerClass()
+ * @library src
+ * @modules java.base/jdk.internal.reflect
+ * @build java.base/java.util.CSM csm/*
+ * @run main/othervm csm/jdk.test.CallerSensitiveTest
+ * @run main/othervm -XX:+UnlockDiagnosticVMOptions -XX:+ShowHiddenFrames csm/jdk.test.CallerSensitiveTest
+ */
+public class Main {
+}
+

test/jdk/java/lang/StackWalker/CallerSensitiveMethod/csm/jdk/test/CallerSensitiveTest.java

@@ -0,0 +1,155 @@
+/*
+ * Copyright (c) 2016, 2024, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.test;
+
+import java.lang.invoke.MethodHandle;
+import java.lang.invoke.MethodHandles;
+import java.lang.invoke.MethodHandles.Lookup;
+import java.lang.invoke.MethodType;
+import java.lang.reflect.Method;
+import java.util.CSM.Result;
+import java.util.function.Supplier;
+
+/**
+ * This test invokes StackWalker::getCallerClass via static reference,
+ * reflection, MethodHandle, lambda.  Also verify that
+ * StackWalker::getCallerClass can't be called from @CallerSensitive method.
+ */
+public class CallerSensitiveTest {
+    private static final String NON_CSM_CALLER_METHOD = "getCallerClass";
+    private static final String REFLECTIVE_GET_CALLER_METHOD = "getCallerClassReflectively";
+    private static final String CSM_CALLER_METHOD = "caller";
+
+    public static void main(String... args) throws Throwable {
+
+        CallerSensitiveTest cstest = new CallerSensitiveTest();
+        // test static call to java.util.CSM::caller and CSM::getCallerClass
+        cstest.staticMethodCall();
+        // test reflective call to StackWalker::getCallerClass
+        cstest.invokeMethod();
+        // test java.lang.reflect.Method call
+        cstest.reflectMethodCall();
+        // test java.lang.invoke.MethodHandle
+        cstest.invokeMethodHandle(Lookup1.lookup);
+        cstest.invokeMethodHandle(Lookup2.lookup);
+        // test method ref
+        cstest.lambda();
+
+        LambdaTest.lambda();
+
+        if (failed > 0) {
+            throw new RuntimeException(failed + " test cases failed.");
+        }
+    }
+
+    void staticMethodCall() {
+        java.util.CSM.caller();
+
+        Result result = java.util.CSM.getCallerClass();
+        checkNonCSMCaller(CallerSensitiveTest.class, result);
+    }
+
+    void reflectMethodCall() throws Throwable {
+        Method method1 = java.util.CSM.class.getMethod(CSM_CALLER_METHOD);
+        method1.invoke(null);
+
+        Method method2 = java.util.CSM.class.getMethod(NON_CSM_CALLER_METHOD);
+        Result result2 = (Result) method2.invoke(null);
+        checkNonCSMCaller(CallerSensitiveTest.class, result2);
+
+        Method method3 = java.util.CSM.class.getMethod(REFLECTIVE_GET_CALLER_METHOD);
+        Result result3 = (Result) method3.invoke(null);
+        checkNonCSMCaller(CallerSensitiveTest.class, result3);
+    }
+
+    void invokeMethod() throws Throwable {
+        Result result = java.util.CSM.getCallerClassReflectively();
+        checkNonCSMCaller(CallerSensitiveTest.class, result);
+    }
+
+    void invokeMethodHandle(Lookup lookup) throws Throwable {
+        MethodHandle mh1 = lookup.findStatic(java.util.CSM.class, CSM_CALLER_METHOD,
+                                             MethodType.methodType(Class.class));
+        Class<?> c = (Class<?>)mh1.invokeExact();
+
+        MethodHandle mh2 = lookup.findStatic(java.util.CSM.class, NON_CSM_CALLER_METHOD,
+                                             MethodType.methodType(Result.class));
+        Result result2 = (Result)mh2.invokeExact();
+        checkNonCSMCaller(CallerSensitiveTest.class, result2);
+
+        MethodHandle mh3 = lookup.findStatic(java.util.CSM.class, REFLECTIVE_GET_CALLER_METHOD,
+                                             MethodType.methodType(Result.class));
+        Result result3 = (Result)mh3.invokeExact();
+        checkNonCSMCaller(CallerSensitiveTest.class, result3);
+    }
+
+    void lambda() {
+        Result result = LambdaTest.getCallerClass.get();
+        checkNonCSMCaller(CallerSensitiveTest.class, result);
+
+        LambdaTest.caller.get();
+    }
+
+    static int failed = 0;
+
+    static void checkNonCSMCaller(Class<?> expected, Result result) {
+        if (result.callers.size() != 1) {
+            throw new RuntimeException("Expected result.callers contain one element");
+        }
+        if (expected != result.callers.get(0)) {
+            System.err.format("ERROR: Expected %s but got %s%n", expected,
+                result.callers);
+            result.frames.stream()
+                .forEach(f -> System.err.println("   " + f));
+            failed++;
+        }
+    }
+
+    static class Lookup1 {
+        static Lookup lookup = MethodHandles.lookup();
+    }
+
+    static class Lookup2 {
+        static Lookup lookup = MethodHandles.lookup();
+    }
+
+    static class LambdaTest {
+        static Supplier<Class<?>> caller = java.util.CSM::caller;
+        static Supplier<Result> getCallerClass = java.util.CSM::getCallerClass;
+
+        static void caller() {
+            caller.get();
+        }
+        static Result getCallerClass() {
+            return getCallerClass.get();
+        }
+
+        static void lambda() {
+            Result result = LambdaTest.getCallerClass();
+            checkNonCSMCaller(LambdaTest.class, result);
+
+            LambdaTest.caller();
+        }
+    }
+}

test/jdk/java/lang/StackWalker/CallerSensitiveMethod/csm/module-info.java

@@ -0,0 +1,26 @@
+/*
+ * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+module csm {
+    exports jdk.test;
+}

test/jdk/java/lang/StackWalker/CallerSensitiveMethod/src/java.base/java/util/CSM.java

@@ -0,0 +1,100 @@
+/*
+ * Copyright (c) 2016, 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package java.util;
+
+import static java.lang.StackWalker.Option.*;
+import java.lang.StackWalker.StackFrame;
+import java.lang.reflect.Method;
+import java.util.stream.Collectors;
+
+import jdk.internal.reflect.CallerSensitive;
+import jdk.internal.reflect.Reflection;
+
+public class CSM {
+    private static StackWalker walker =
+        StackWalker.getInstance(EnumSet.of(RETAIN_CLASS_REFERENCE,
+                                           DROP_METHOD_INFO,
+                                           SHOW_HIDDEN_FRAMES,
+                                           SHOW_REFLECT_FRAMES));
+
+    public static class Result {
+        public final List<Class<?>> callers;
+        public final List<StackWalker.StackFrame> frames;
+        Result(List<Class<?>> callers,
+               List<StackFrame> frames) {
+            this.callers = callers;
+            this.frames = frames;
+        }
+    }
+
+    /**
+     * Returns the caller of this caller-sensitive method returned by
+     * by Reflection::getCallerClass.
+     *
+     * StackWalker::getCallerClass is expected to throw UOE
+     */
+    @CallerSensitive
+    public static Class<?> caller() {
+        Class<?> c1 = Reflection.getCallerClass();
+
+        try {
+            Class<?> c2 = walker.getCallerClass();
+            throw new RuntimeException("Exception not thrown by StackWalker::getCallerClass. Returned " + c2.getName());
+        } catch (UnsupportedOperationException e) {}
+        return c1;
+    }
+
+    /**
+     * Returns the caller of this non-caller-sensitive method returned
+     * by StackWalker::getCallerClass
+     */
+    public static Result getCallerClass() {
+        Class<?> caller = walker.getCallerClass();
+        return new Result(List.of(caller), dump());
+    }
+
+    private static final Method GET_CALLER_CLASS;
+    static {
+        Method m = null;
+        try {
+            m = StackWalker.class.getMethod("getCallerClass");
+        } catch (ReflectiveOperationException e) {
+            throw new RuntimeException(e);
+        }
+        GET_CALLER_CLASS = m;
+    }
+
+    /**
+     * Returns the caller of this non-caller-sensitive method returned
+     * by StackWalker::getCallerClass invoked via core reflection
+     */
+    public static Result getCallerClassReflectively() throws ReflectiveOperationException {
+        Class<?> caller = (Class<?>)GET_CALLER_CLASS.invoke(walker);
+        return new Result(List.of(caller), dump());
+    }
+
+    static List<StackFrame> dump() {
+        return walker.walk(s -> s.collect(Collectors.toList()));
+    }
+}

test/jdk/java/lang/StackWalker/DumpStackTest.java

@@ -0,0 +1,222 @@
+/*
+ * Copyright (c) 2015, 2025, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * @test
+ * @bug 8143214
+ * @summary Verify outputs of Thread.dumpStack() and Throwable.printStackTrace().
+ *          This test should also been run against jdk9 successfully except of
+ *          VM option MemberNameInStackFrame.
+ * @requires test.thread.factory == null
+ * @run main/othervm DumpStackTest
+ */
+
+import java.lang.invoke.MethodHandle;
+import java.lang.invoke.MethodHandles;
+import java.lang.invoke.MethodType;
+import java.lang.reflect.Method;
+import java.util.Arrays;
+import java.util.function.Consumer;
+
+public class DumpStackTest {
+
+    public static void main(String args[]) {
+        test();
+        testThread();
+        testLambda();
+        testMethodInvoke();
+        testMethodHandle();
+    }
+
+    static class CallFrame {
+        final String classname;
+        final String methodname;
+        CallFrame(Class<?> c, String methodname) {
+            this(c.getName(), methodname);
+        }
+        CallFrame(String classname, String methodname) {
+            this.classname = classname;
+            this.methodname = methodname;
+        }
+
+        String getClassName() {
+            return classname;
+        }
+        String getMethodName() {
+            return methodname;
+        }
+        String getFileName() {
+            int i = classname.lastIndexOf('.');
+            int j = classname.lastIndexOf('$');
+            String name = classname.substring(i+1, j >= 0 ? j : classname.length());
+            return name + ".java";
+        }
+        @Override
+        public String toString() {
+            return classname + "." + methodname + "(" + getFileName() + ")";
+        }
+    }
+
+    static void test() {
+        CallFrame[] callStack = new CallFrame[] {
+                new CallFrame(Thread.class, "getStackTrace"),
+                new CallFrame(DumpStackTest.class, "test"),
+                new CallFrame(DumpStackTest.class, "main"),
+                // if invoked from jtreg
+                new CallFrame("jdk.internal.reflect.DirectMethodHandleAccessor", "invoke"), // non-public class
+                new CallFrame(Method.class, "invoke"),
+                new CallFrame(Thread.class, "run"),
+        };
+
+        assertStackTrace(Thread.currentThread().getStackTrace(), callStack);
+        getStackTrace(callStack);
+    }
+
+    static void getStackTrace(CallFrame[] callStack) {
+        // this method is the top of the stack
+        callStack[0] = new CallFrame(DumpStackTest.class, "getStackTrace");
+
+        try {
+            throw new RuntimeException();
+        } catch(RuntimeException ex) {
+            assertStackTrace(ex.getStackTrace(), callStack);
+        }
+    }
+    static void testThread() {
+        Thread t1 = new Thread() {
+            public void run() {
+                c();
+            }
+
+            void c() {
+                CallFrame[] callStack = new CallFrame[] {
+                        new CallFrame(Thread.class, "getStackTrace"),
+                        new CallFrame(this.getClass(), "c"),
+                        new CallFrame(this.getClass(), "run")
+                };
+                assertStackTrace(Thread.currentThread().getStackTrace(), callStack);
+                DumpStackTest.getStackTrace(callStack);
+            }
+        };
+        t1.start();
+        try {
+            t1.join();
+        } catch(InterruptedException e) {}
+    }
+
+    static void testLambda() {
+        Consumer<Void> c = (x) -> consumeLambda();
+        c.accept(null);
+    }
+
+    static void consumeLambda() {
+        CallFrame[] callStack = new CallFrame[]{
+                new CallFrame(Thread.class, "getStackTrace"),
+                new CallFrame(DumpStackTest.class, "consumeLambda"),
+                new CallFrame(DumpStackTest.class, "lambda$testLambda$0"),
+                new CallFrame(DumpStackTest.class, "testLambda"),
+                new CallFrame(DumpStackTest.class, "main"),
+                // if invoked from jtreg
+                new CallFrame("jdk.internal.reflect.DirectMethodHandleAccessor", "invoke"),
+                new CallFrame(Method.class, "invoke"),
+                new CallFrame(Thread.class, "run")
+        };
+        assertStackTrace(Thread.currentThread().getStackTrace(), callStack);
+        DumpStackTest.getStackTrace(callStack);
+    }
+
+    static void testMethodInvoke() {
+        try {
+            Method m = DumpStackTest.class.getDeclaredMethod("methodInvoke");
+            m.invoke(null);
+        } catch(Exception e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+    static void methodInvoke() {
+        CallFrame[] callStack = new CallFrame[] {
+                new CallFrame(Thread.class, "getStackTrace"),
+                new CallFrame(DumpStackTest.class, "methodInvoke"),
+                new CallFrame("jdk.internal.reflect.DirectMethodHandleAccessor", "invoke"),
+                new CallFrame(Method.class, "invoke"),
+                new CallFrame(DumpStackTest.class, "testMethodInvoke"),
+                new CallFrame(DumpStackTest.class, "main"),
+                // if invoked from jtreg
+                new CallFrame("jdk.internal.reflect.DirectMethodHandleAccessor", "invoke"),
+                new CallFrame(Method.class, "invoke"),
+                new CallFrame(Thread.class, "run")
+        };
+        assertStackTrace(Thread.currentThread().getStackTrace(), callStack);
+        DumpStackTest.getStackTrace(callStack);
+    }
+
+    static void testMethodHandle() {
+        MethodHandles.Lookup lookup = MethodHandles.lookup();
+        try {
+            MethodHandle handle = lookup.findStatic(DumpStackTest.class, "methodHandle",
+                                                    MethodType.methodType(void.class));
+            handle.invoke();
+        } catch(Throwable t) {
+            throw new RuntimeException(t);
+        }
+    }
+
+    static void methodHandle() {
+        CallFrame[] callStack = new CallFrame[]{
+                new CallFrame(Thread.class, "getStackTrace"),
+                new CallFrame(DumpStackTest.class, "methodHandle"),
+                new CallFrame(DumpStackTest.class, "testMethodHandle"),
+                new CallFrame(DumpStackTest.class, "main"),
+                // if invoked from jtreg
+                new CallFrame("jdk.internal.reflect.DirectMethodHandleAccessor", "invoke"),
+                new CallFrame(Method.class, "invoke"),
+                new CallFrame(Thread.class, "run")
+        };
+        assertStackTrace(Thread.currentThread().getStackTrace(), callStack);
+        DumpStackTest.getStackTrace(callStack);
+    }
+
+    static void assertStackTrace(StackTraceElement[] actual, CallFrame[] expected) {
+        System.out.println("--- Actual ---");
+        Arrays.stream(actual).forEach(e -> System.out.println(e));
+        System.out.println("--- Expected ---");
+        Arrays.stream(expected).forEach(e -> System.out.println(e));
+
+        for (int i = 0, j = 0; i < actual.length; i++) {
+            // filter test framework classes
+            if (actual[i].getClassName().startsWith("com.sun.javatest.regtest"))
+                continue;
+            assertEquals(actual[i], expected[j++], i);
+        }
+
+    }
+    static void assertEquals(StackTraceElement actual, CallFrame expected, int idx) {
+        if (!actual.getClassName().equals(expected.getClassName()) ||
+                !actual.getFileName().equals(expected.getFileName()) ||
+                !actual.getMethodName().equals(expected.getMethodName())) {
+            throw new RuntimeException("StackTraceElements mismatch at index " + idx +
+                ". Expected [" + expected + "], but get [" + actual + "]");
+        }
+    }
+}

test/jdk/java/lang/StackWalker/EmbeddedStackWalkTest.java

@@ -0,0 +1,158 @@
+/*
+ * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+
+/**
+ * @test
+ * @bug 8143214
+ * @summary Verify StackWalker works well when embedded in another
+ *          StackWalker's functions.
+ * @run testng/othervm EmbeddedStackWalkTest
+ */
+
+import java.lang.StackWalker.StackFrame;
+import static java.lang.StackWalker.Option.*;
+import java.lang.invoke.MethodHandle;
+import java.lang.invoke.MethodHandles;
+import java.lang.invoke.MethodType;
+import java.util.Arrays;
+import java.util.EnumSet;
+
+import org.testng.annotations.*;
+import static org.testng.Assert.*;
+
+public class EmbeddedStackWalkTest {
+    static final StackWalker WALKERS[] = new StackWalker[] {
+            StackWalker.getInstance(RETAIN_CLASS_REFERENCE),
+            StackWalker.getInstance(EnumSet.of(SHOW_REFLECT_FRAMES, RETAIN_CLASS_REFERENCE)),
+            StackWalker.getInstance(EnumSet.of(SHOW_HIDDEN_FRAMES, RETAIN_CLASS_REFERENCE))
+    };
+
+    static final int BIG_LOOP   = 30;
+    static final int SMALL_LOOP = 5;
+
+    @DataProvider
+    public StackWalker[][] walkerProvider() {
+        return new StackWalker[][] {
+                new StackWalker[] { WALKERS[0] },
+                new StackWalker[] { WALKERS[1] },
+                new StackWalker[] { WALKERS[2] }
+        };
+    }
+
+    @Test(dataProvider = "walkerProvider")
+    public void test(StackWalker walker) {
+        C1.call(walker, BIG_LOOP);
+    }
+
+    // line numbers are hardcoded for now.
+    // Should annotate the line numbers and auto-generated these constants
+    // for test verification instead
+    static final int BEGIN_LINE = 71;   // the begin line number of approximate range.
+    static final int END_LINE   = 136;  // the end line number of approximate range.
+    static class C1 { // here is the begin line number of approximate range, L71.
+        public static void call(StackWalker walker, int loops) {
+            if (loops == 0) {
+                String caller = walker.walk(s ->
+                    s.map(StackFrame::getClassName)
+                     .filter(cn -> !cn.startsWith("jdk.internal.reflect.") && !cn.startsWith("java.lang.invoke"))
+                     .skip(2).findFirst()
+                ).get();
+                assertEquals(caller, C1.class.getName());
+
+                walker.forEach(f -> C2.testEmbeddedWalker());
+            } else {
+                call(walker, --loops);
+            }
+        }
+    }
+
+    static class C2 {
+        static final StackWalker embeddedWalkers[] = new StackWalker[] {
+            StackWalker.getInstance(),
+            StackWalker.getInstance(SHOW_REFLECT_FRAMES),
+            StackWalker.getInstance(SHOW_HIDDEN_FRAMES)
+        };
+
+        public static void testEmbeddedWalker() {
+            walk(SMALL_LOOP);
+        }
+
+        static void walk(int loops) {
+            if (loops == 0) {
+                Arrays.stream(embeddedWalkers)
+                      .forEach(walker -> run(walker));
+            } else {
+                walk(--loops);
+            }
+        }
+
+        static void run(StackWalker walker) {
+            MethodHandles.Lookup lookup = MethodHandles.lookup();
+            MethodHandle handle = null;
+            try {
+                handle = lookup.findStatic(C2.class, "call",
+                        MethodType.methodType(void.class, StackWalker.class));
+                handle.invoke(walker);
+            } catch(Throwable t) {
+                throw new RuntimeException(t);
+            }
+        }
+
+        static void call(StackWalker walker) {
+            String caller = walker.walk(s ->
+                s.map(StackFrame::getClassName)
+                 .filter(cn -> !cn.startsWith("jdk.internal.reflect.") && !cn.startsWith("java.lang.invoke"))
+                 .skip(2).findFirst()
+            ).get();
+            assertEquals(caller, C2.class.getName());
+
+            verify(walker, C1.class, "call");
+            verify(walker, C2.class, "call");
+            verify(walker, C2.class, "run");
+            verify(walker, C2.class, "walk");
+            verify(walker, C2.class, "testEmbeddedWalker");
+        } // here is the end line number of approximate range, L136.
+
+        static void verify(StackWalker walker, Class<?> c, String mn) {
+            final String fileName = "EmbeddedStackWalkTest.java";
+            walker.walk(s -> {
+                s.limit(BIG_LOOP)
+                 .filter(f -> c.getName().equals(f.getClassName()) && mn.equals(f.getMethodName()))
+                 .forEach(f -> {
+                    assertEquals(f.getFileName(), fileName);
+                    int line = f.getLineNumber();
+                    assertTrue(line >= BEGIN_LINE && line <= END_LINE);
+
+                    StackTraceElement st = f.toStackTraceElement();
+                    assertEquals(c.getName(), st.getClassName());
+                    assertEquals(mn, st.getMethodName());
+                    assertEquals(st.getFileName(), fileName);
+                    line = st.getLineNumber();
+                    assertTrue(line >= BEGIN_LINE && line <= END_LINE);
+                });
+                return null;
+            });
+        }
+    }
+}

test/jdk/java/lang/StackWalker/GetCallerClassTest.java

@@ -0,0 +1,265 @@
+/*
+ * Copyright (c) 2015, 2024, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * @test
+ * @bug 8140450 8152893 8189291 8210375
+ * @summary Basic test for StackWalker.getCallerClass()
+ * @run main/othervm GetCallerClassTest
+ * @run main/othervm -XX:+UnlockDiagnosticVMOptions -XX:+ShowHiddenFrames GetCallerClassTest
+ */
+
+import static java.lang.StackWalker.Option.*;
+import java.lang.invoke.MethodHandle;
+import java.lang.invoke.MethodHandles;
+import java.lang.invoke.MethodType;
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
+import java.util.Arrays;
+import java.util.EnumSet;
+import java.util.List;
+
+public class GetCallerClassTest {
+    private final StackWalker walker;
+    private final boolean expectUOE;
+
+    public GetCallerClassTest(StackWalker sw, boolean expect) {
+        this.walker = sw;
+        this.expectUOE = expect;
+    }
+    public static void main(String... args) throws Exception {
+        new GetCallerClassTest(StackWalker.getInstance(), true).test();
+        new GetCallerClassTest(StackWalker.getInstance(RETAIN_CLASS_REFERENCE), false).test();
+        new GetCallerClassTest(StackWalker.getInstance(EnumSet.of(RETAIN_CLASS_REFERENCE,
+                                                                  SHOW_HIDDEN_FRAMES)), false).test();
+    }
+
+    public void test() {
+        new TopLevelCaller().run();
+        new LambdaTest().run();
+        new Nested().createNestedCaller().run();
+        new InnerClassCaller().run();
+        new ReflectionTest().run();
+
+        List<Thread> threads = Arrays.asList(
+                new Thread(new TopLevelCaller()),
+                new Thread(new LambdaTest()),
+                new Thread(new Nested().createNestedCaller()),
+                new Thread(new InnerClassCaller()),
+                new Thread(new ReflectionTest())
+        );
+        threads.stream().forEach(Thread::start);
+        threads.stream().forEach(t -> {
+            try {
+                t.join();
+            } catch (InterruptedException e) {
+                throw new RuntimeException(e);
+            }
+        });
+    }
+
+    public static void staticGetCallerClass(StackWalker stackWalker,
+                                            Class<?> expected,
+                                            boolean expectUOE) {
+        try {
+            Class<?> c = stackWalker.getCallerClass();
+            assertEquals(c, expected);
+            if (expectUOE) { // Should have thrown
+                throw new RuntimeException("Didn't get expected exception");
+            }
+        } catch (RuntimeException e) { // also catches UOE
+            if (expectUOE && causeIsUOE(e)) {
+                return; /* expected */
+            }
+            System.err.println("Unexpected exception:");
+            throw e;
+        }
+    }
+
+    public static void reflectiveGetCallerClass(StackWalker stackWalker,
+                                                Class<?> expected,
+                                                boolean expectUOE) {
+        try {
+            // Use reflection to call Method::invoke that invokes StackWalker::getCallerClass
+            Method m = StackWalker.class.getMethod("getCallerClass");
+            Method invoke = Method.class.getMethod("invoke", Object.class, Object[].class);
+            Class<?> c = (Class<?>) invoke.invoke(m, new Object[] { stackWalker, null });
+            assertEquals(c, expected);
+            if (expectUOE) { // Should have thrown
+                throw new RuntimeException("Didn't get expected exception");
+            }
+        } catch (Throwable e) {
+            if (expectUOE && causeIsUOE(e)) {
+                return; /* expected */
+            }
+            System.err.println("Unexpected exception:");
+            throw new RuntimeException(e);
+        }
+    }
+
+    public static void methodHandleGetCallerClass(StackWalker stackWalker,
+                                                  Class<?> expected,
+                                                  boolean expectUOE) {
+        MethodHandles.Lookup lookup = MethodHandles.lookup();
+        try {
+            MethodHandle mh = lookup.findVirtual(StackWalker.class, "getCallerClass",
+                                                 MethodType.methodType(Class.class));
+            Class<?> c = (Class<?>) mh.invokeExact(stackWalker);
+            assertEquals(c, expected);
+            if (expectUOE) { // Should have thrown
+                throw new RuntimeException("Didn't get expected exception");
+            }
+        } catch (Throwable e) {
+            if (expectUOE && causeIsUOE(e)) {
+                return; /* expected */
+            }
+            System.err.println("Unexpected exception:");
+            throw new RuntimeException(e);
+        }
+    }
+
+    public static void assertEquals(Class<?> c, Class<?> expected) {
+        if (expected != c) {
+            throw new RuntimeException("Got " + c + ", but expected " + expected);
+        }
+    }
+
+    /** Is there an UnsupportedOperationException in there? */
+    public static boolean causeIsUOE(Throwable t) {
+        while (t != null) {
+            if (t instanceof UnsupportedOperationException) {
+                return true;
+            }
+            t = t.getCause();
+        }
+        return false;
+    }
+
+    class TopLevelCaller implements Runnable {
+        public void run() {
+            GetCallerClassTest.staticGetCallerClass(walker, this.getClass(), expectUOE);
+            GetCallerClassTest.reflectiveGetCallerClass(walker, this.getClass(), expectUOE);
+            GetCallerClassTest.methodHandleGetCallerClass(walker, this.getClass(), expectUOE);
+        }
+    }
+
+    class LambdaTest implements Runnable {
+        public void run() {
+            Runnable lambdaRunnable = () -> {
+                try {
+                    Class<?> c = walker.getCallerClass();
+
+                    assertEquals(c, LambdaTest.class);
+                    if (expectUOE) { // Should have thrown
+                        throw new RuntimeException("Didn't get expected exception");
+                    }
+                } catch (Throwable e) {
+                    if (expectUOE && causeIsUOE(e)) {
+                        return; /* expected */
+                    }
+                    System.err.println("Unexpected exception:");
+                    throw new RuntimeException(e);
+                }
+            };
+            lambdaRunnable.run();
+        }
+    }
+
+    class Nested {
+        NestedClassCaller createNestedCaller() { return new NestedClassCaller(); }
+        class NestedClassCaller implements Runnable {
+            public void run() {
+                GetCallerClassTest.staticGetCallerClass(walker, this.getClass(), expectUOE);
+                GetCallerClassTest.reflectiveGetCallerClass(walker, this.getClass(), expectUOE);
+                GetCallerClassTest.methodHandleGetCallerClass(walker, this.getClass(), expectUOE);
+            }
+        }
+    }
+
+    class InnerClassCaller implements Runnable {
+        public void run() {
+            new Inner().test();
+        }
+        class Inner {
+            void test() {
+                GetCallerClassTest.staticGetCallerClass(walker, this.getClass(), expectUOE);
+                GetCallerClassTest.reflectiveGetCallerClass(walker, this.getClass(), expectUOE);
+                GetCallerClassTest.methodHandleGetCallerClass(walker, this.getClass(), expectUOE);
+            }
+        }
+    }
+
+    class ReflectionTest implements Runnable {
+        final MethodType methodType =
+            MethodType.methodType(void.class, StackWalker.class, Class.class, boolean.class);
+
+        public void run() {
+            callMethodHandle();
+            callMethodHandleRefl();
+            callMethodInvoke();
+            callMethodInvokeRefl();
+        }
+        void callMethodHandle() {
+            MethodHandles.Lookup lookup = MethodHandles.publicLookup();
+            try {
+                MethodHandle mh = lookup.findStatic(GetCallerClassTest.class,
+                                                    "staticGetCallerClass",
+                                                    methodType);
+                mh.invokeExact(walker, ReflectionTest.class, expectUOE);
+            } catch (Throwable e) {
+                throw new RuntimeException(e);
+            }
+        }
+        void callMethodHandleRefl() {
+            MethodHandles.Lookup lookup = MethodHandles.publicLookup();
+            try {
+                MethodHandle mh = lookup.findStatic(GetCallerClassTest.class,
+                                                    "reflectiveGetCallerClass",
+                                                    methodType);
+                mh.invokeExact(walker, ReflectionTest.class, expectUOE);
+            } catch (Throwable e) {
+                throw new RuntimeException(e);
+            }
+        }
+        void callMethodInvoke() {
+            try {
+                Method m = GetCallerClassTest.class.getMethod("staticGetCallerClass",
+                               StackWalker.class, Class.class, boolean.class);
+                m.invoke(null, walker, ReflectionTest.class, expectUOE);
+            } catch (NoSuchMethodException|IllegalAccessException|InvocationTargetException e) {
+                throw new RuntimeException(e);
+            }
+        }
+        void callMethodInvokeRefl() {
+            try {
+                Method m = GetCallerClassTest.class.getMethod("reflectiveGetCallerClass",
+                               StackWalker.class, Class.class, boolean.class);
+                m.invoke(null, walker, ReflectionTest.class, expectUOE);
+            } catch (UnsupportedOperationException e) {
+                throw e;
+            } catch (NoSuchMethodException|IllegalAccessException|InvocationTargetException e) {
+                throw new RuntimeException(e);
+            }
+        }
+    }
+}

test/jdk/java/lang/StackWalker/HiddenFrames.java

@@ -0,0 +1,108 @@
+/*
+ * Copyright (c) 2015, 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * @test
+ * @bug 8020968
+ * @summary Basic test for hidden frames
+ * @run main HiddenFrames
+ */
+
+import java.lang.StackWalker.Option;
+import java.lang.StackWalker.StackFrame;
+import java.lang.reflect.Method;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.stream.Stream;
+
+public class HiddenFrames {
+    public static void main(String... args) throws Exception {
+        new HiddenFrames().test();
+        new HiddenFrames(Option.SHOW_REFLECT_FRAMES).test();
+        new HiddenFrames(Option.SHOW_HIDDEN_FRAMES).test();
+    }
+
+    private final Option option;
+    private final StackWalker walker;
+    private final List<StackFrame> lambdas = new ArrayList<>();
+    private final List<StackFrame> reflects = new ArrayList<>();
+
+    HiddenFrames() {
+        this.option = null;
+        this.walker = StackWalker.getInstance();
+    }
+    HiddenFrames(Option option) {
+        this.option = option;
+        this.walker = StackWalker.getInstance(option);
+    }
+
+    void test() throws Exception {
+        walk();
+        walkFromReflection();
+    }
+
+    void walk() {
+       Stream.of(0).forEach(i -> walker.walk(s ->
+       {
+           s.forEach(this::checkFrame);
+           return null;
+       }));
+
+        // only check hidden frames but not reflection frames
+        // walk is not invoked via reflection
+        if (option == null && !lambdas.isEmpty()) {
+            throw new RuntimeException("Hidden frames are shown");
+        }
+
+        if (option == Option.SHOW_HIDDEN_FRAMES && lambdas.isEmpty()) {
+            throw new RuntimeException("No hidden Lambda frame");
+        }
+    }
+
+    void walkFromReflection() throws Exception {
+        Method m = HiddenFrames.class.getDeclaredMethod("walk");
+        m.invoke(this);
+
+        if (option == null && !lambdas.isEmpty()) {
+            throw new RuntimeException("Hidden frames are shown");
+        }
+
+        if (option == Option.SHOW_HIDDEN_FRAMES && lambdas.isEmpty()) {
+            throw new RuntimeException("No hidden Lambda frame");
+        }
+
+        if (option != null && reflects.isEmpty()) {
+            throw new RuntimeException("No reflection frame");
+        }
+    }
+
+    void checkFrame(StackFrame frame) {
+        String cn = frame.getClassName();
+        if (cn.startsWith("java.lang.reflect.") || cn.startsWith("jdk.internal.reflect.")) {
+            reflects.add(frame);
+        }
+        if (cn.contains("$$Lambda")) {
+            lambdas.add(frame);
+        }
+    }
+}

test/jdk/java/lang/StackWalker/LocalsAndOperands.java

@@ -0,0 +1,543 @@
+/*
+ * Copyright (c) 2015, 2025, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * @test
+ * @bug 8020968 8147039 8156073
+ * @summary Tests for locals and operands
+ * @modules java.base/java.lang:open
+ * @run testng/othervm/timeout=480 -Xint -DtestUnused=true LocalsAndOperands
+ * @run testng/othervm/timeout=480 -Xcomp LocalsAndOperands
+ */
+
+/*
+ * @test
+ * @bug 8020968 8147039 8156073
+ * @modules java.base/java.lang:open
+ * @requires !vm.graal.enabled
+ * @run testng/othervm/timeout=480 -Xcomp -XX:-TieredCompilation LocalsAndOperands
+ */
+
+import org.testng.annotations.*;
+import static org.testng.Assert.*;
+import java.lang.StackWalker.StackFrame;
+import static java.lang.StackWalker.Option.*;
+import java.lang.reflect.*;
+import java.util.*;
+import java.util.stream.*;
+
+public class LocalsAndOperands {
+    static final boolean debug = false;
+    static final boolean is32bit;
+    static final boolean testUnused;
+
+    static Class<?> liveStackFrameClass;
+    static Class<?> primitiveSlotClass;
+    static Class<?> primitiveSlot32Class;
+    static Class<?> primitiveSlot64Class;
+
+    static StackWalker extendedWalker;
+    static Method getLocals;
+    static Method getOperands;
+    static Method getMonitors;
+    static Method primitiveSize;
+    static Method primitiveLongValue;
+    static Method primitiveIntValue;
+    static Method getExtendedWalker;
+
+    private static final long LOWER_LONG_VAL = 4L; // Lower bits
+    private static final long UPPER_LONG_VAL = 0x123400000000L; // Upper bits
+    private static final long NEG_LONG_VAL = Long.MIN_VALUE;
+
+    private static final double LOWER_DOUBLE_VAL = Double.longBitsToDouble(0xABCDL);
+    private static final double UPPER_DOUBLE_VAL = Double.longBitsToDouble(0x432100000000L);
+
+    static {
+        try {
+            liveStackFrameClass = Class.forName("java.lang.LiveStackFrame");
+            primitiveSlotClass = Class.forName("java.lang.LiveStackFrame$PrimitiveSlot");
+            primitiveSlot32Class = Class.forName("java.lang.LiveStackFrameInfo$PrimitiveSlot32");
+            primitiveSlot64Class = Class.forName("java.lang.LiveStackFrameInfo$PrimitiveSlot64");
+
+            getLocals = liveStackFrameClass.getDeclaredMethod("getLocals");
+            getLocals.setAccessible(true);
+
+            getOperands = liveStackFrameClass.getDeclaredMethod("getStack");
+            getOperands.setAccessible(true);
+
+            getMonitors = liveStackFrameClass.getDeclaredMethod("getMonitors");
+            getMonitors.setAccessible(true);
+
+            primitiveSize = primitiveSlotClass.getDeclaredMethod("size");
+            primitiveSize.setAccessible(true);
+
+            primitiveLongValue = primitiveSlotClass.getDeclaredMethod("longValue");
+            primitiveLongValue.setAccessible(true);
+
+            primitiveIntValue = primitiveSlotClass.getDeclaredMethod("intValue");
+            primitiveIntValue.setAccessible(true);
+
+            getExtendedWalker = liveStackFrameClass.getMethod("getStackWalker", Set.class);
+            getExtendedWalker.setAccessible(true);
+            extendedWalker = (StackWalker) getExtendedWalker.invoke(null,
+                    EnumSet.noneOf(StackWalker.Option.class));
+
+            String dataModel = System.getProperty("sun.arch.data.model");
+            if ("32".equals(dataModel)) {
+                is32bit = true;
+            } else if ("64".equals(dataModel)) {
+                is32bit= false;
+            } else {
+                throw new RuntimeException("Weird data model:" + dataModel);
+            }
+            System.out.println("VM bits: " + dataModel);
+
+            testUnused = System.getProperty("testUnused") != null;
+        } catch (Throwable t) { throw new RuntimeException(t); }
+    }
+
+    /** Helper method to return a StackFrame's locals */
+    static Object[] invokeGetLocals(StackFrame arg) {
+        try {
+            return (Object[]) getLocals.invoke(arg);
+        } catch (Exception e) { throw new RuntimeException(e); }
+    }
+
+    /*****************
+     * DataProviders *
+     *****************/
+
+    /** Calls KnownLocalsTester.testLocals* and provides LiveStackFrames */
+    @DataProvider
+    public static StackFrame[][] knownLocalsProvider() {
+        List<StackFrame[]> list = new ArrayList<>(3);
+        list.add(new KnownLocalsTester().testLocalsKeepAlive());
+        list.add(new KnownLocalsTester().testLocalsKeepAliveArgs(0xA, 'z',
+                "himom", 0x3FF00000000L + 0xFFFF, Math.PI));
+        if (testUnused) {
+            list.add(new KnownLocalsTester().testLocalsUnused());
+        }
+        return list.toArray(new StackFrame[1][1]);
+    }
+
+    /****************
+     * Test methods *
+     ****************/
+
+    /**
+     * Check for expected local values in the LiveStackFrame
+     */
+    @Test(dataProvider = "knownLocalsProvider")
+    public static void checkLocalValues(StackFrame... frames) {
+        dumpFramesIfDebug(frames);
+        try {
+            Stream.of(frames)
+                  .filter(f -> KnownLocalsTester.TEST_METHODS.contains(f.getMethodName()))
+                  .forEach(LocalsAndOperands::checkFrameLocals);
+        } catch (Exception e) { dumpFramesIfNotDebug(frames); throw e; }
+    }
+
+    /**
+     * Check the locals in the given StackFrame against the expected values.
+     */
+    private static void checkFrameLocals(StackFrame f) {
+        Object[] expectedArray = KnownLocalsTester.LOCAL_VALUES;
+        Object[] locals = invokeGetLocals(f);
+
+        for (int i = 0; i < locals.length; i++) {
+            Object expected = expectedArray[i];
+            Object observed = locals[i];
+
+            if (expected == null) { /* skip nulls in golden values */
+                continue;
+            } else if (expected instanceof KnownLocalsTester.TwoSlotValue) {
+                // confirm integrity of expected values
+                assertEquals(expectedArray[i+1], null,
+                        "Malformed array of expected values - slot after TwoSlotValue should be null");
+                assertLongIsInSlots(locals[i], locals[i+1],
+                        ((KnownLocalsTester.TwoSlotValue)expected).value);
+                i++; // skip following slot
+            } else if (primitiveSlotClass.isInstance(observed)) { // single slot primitive
+                assertTrue(primitiveValueEquals(observed, expected),
+                        "Local value mismatch: local " + i + " value is " +
+                          observed + ", expected " + expected);
+            } else if (expected instanceof Class) {
+                assertTrue(((Class)expected).isInstance(observed),
+                        "Local value mismatch: local " + i + " expected instancof " +
+                          expected + " but got " + observed);
+            } else if (expected instanceof String) {
+                assertEquals(expected, observed, "Local value mismatch: local " +
+                        i + " value is " + observed + ", expected " + expected);
+            } else {
+                throw new RuntimeException("Unrecognized expected local value " +
+                        i + ": " + expected);
+            }
+        }
+    }
+
+    /**
+     * Sanity check for locals and operands, including testng/jtreg frames
+     * using all StackWalker options.
+     */
+    @Test
+    public synchronized void fullStackSanityCheck() throws Throwable {
+        if (debug) {
+            System.out.println("Running fullStackSanityCheck");
+        }
+        StackWalker sw = (StackWalker) getExtendedWalker.invoke(null,
+                EnumSet.of(SHOW_HIDDEN_FRAMES, SHOW_REFLECT_FRAMES,
+                           RETAIN_CLASS_REFERENCE));
+        sw.forEach(f -> {
+            if (debug) {
+                printLocals(f);
+            } else {
+                try {
+                    System.out.println("    " + f + ": " +
+                      ((Object[]) getLocals.invoke(f)).length + " locals, " +
+                      ((Object[]) getOperands.invoke(f)).length + " operands, " +
+                      ((Object[]) getMonitors.invoke(f)).length + " monitors");
+                } catch (IllegalAccessException|InvocationTargetException t) {
+                    throw new RuntimeException(t);
+                }
+            }
+        });
+    }
+
+    /**
+     * Test that LiveStackFrames are not provided with the default StackWalker
+     * options.
+     */
+    @Test
+    public static void noLocalsSanityCheck() {
+        StackWalker sw = StackWalker.getInstance();
+        sw.forEach(f -> {
+            assertFalse(liveStackFrameClass.isInstance(f),
+                        "should not be LiveStackFrame");
+        });
+    }
+
+    /**
+     * Class stack-walking methods with a known set of methods and local variables.
+     */
+    static class KnownLocalsTester {
+        private StackWalker walker;
+
+        KnownLocalsTester() {
+            this.walker = extendedWalker;
+        }
+
+        /**
+         * Perform stackwalk without keeping local variables alive and return an
+         * array of the collected StackFrames
+         */
+        private synchronized StackFrame[] testLocalsUnused() {
+            // Unused local variables will become dead
+            int x = 0xA;
+            char c = 'z'; // 0x7A
+            String hi = "himom";
+            long l = 0x3FF00000000L + 0xFFFFL;
+            double d =  Math.PI;
+
+            return walker.walk(s ->
+                s.filter(f -> TEST_METHODS.contains(f.getMethodName()))
+                 .toArray(StackFrame[]::new)
+            );
+        }
+
+        /**
+         * Perform stackwalk, keeping local variables alive, and return a list of
+         * the collected StackFrames
+         */
+        private synchronized StackFrame[] testLocalsKeepAlive() {
+            int x = 0xA;
+            char c = 'z'; // 0x7A
+            String hi = "himom";
+            long l = 0x3FF00000000L + 0xFFFFL;
+            double d =  Math.PI;
+
+            StackFrame[] frames = walker.walk(s ->
+                s.filter(f -> TEST_METHODS.contains(f.getMethodName()))
+                 .toArray(StackFrame[]::new)
+            );
+
+            // Use local variables so they stay alive
+            System.out.println("Stayin' alive: "+this+" "+x+" "+c+" "+hi+" "+l+" "+d);
+            return frames;
+        }
+
+        /**
+         * Perform stackwalk, keeping method arguments alive, and return a list of
+         * the collected StackFrames
+         */
+        private synchronized StackFrame[] testLocalsKeepAliveArgs(int x, char c,
+                                                                  String hi, long l,
+                                                                  double d) {
+            StackFrame[] frames = walker.walk(s ->
+                s.filter(f -> TEST_METHODS.contains(f.getMethodName()))
+                 .toArray(StackFrame[]::new)
+            );
+
+            // Use local variables so they stay alive
+            System.out.println("Stayin' alive: "+this+" "+x+" "+c+" "+hi+" "+l+" "+d);
+            return frames;
+        }
+
+        // An expected two-slot local (i.e. long or double)
+        static class TwoSlotValue {
+            public long value;
+            public TwoSlotValue(long value) { this.value = value; }
+        }
+
+        // Expected values for locals in KnownLocalsTester.testLocals* methods
+        private final static Object[] LOCAL_VALUES = new Object[] {
+            LocalsAndOperands.KnownLocalsTester.class,
+            Integer.valueOf(0xA),
+            Integer.valueOf(0x7A),
+            "himom",
+            new TwoSlotValue(0x3FF00000000L + 0xFFFFL),
+            null, // 2nd slot
+            new TwoSlotValue(Double.doubleToRawLongBits(Math.PI)),
+            null, // 2nd slot
+            Integer.valueOf(0)
+        };
+
+        private final static List<String> TEST_METHODS =
+                List.of("testLocalsUnused",
+                        "testLocalsKeepAlive",
+                        "testLocalsKeepAliveArgs");
+    }
+
+    /* Simpler tests of long & double arguments */
+
+    @Test
+    public static void testUsedLongArg() throws Exception {
+        usedLong(LOWER_LONG_VAL);
+        usedLong(UPPER_LONG_VAL);
+        usedLong(NEG_LONG_VAL);
+    }
+
+    private static void usedLong(long longArg) throws Exception {
+        StackFrame[] frames = extendedWalker.walk(s ->
+            s.filter(f -> "usedLong".equals(f.getMethodName()))
+             .toArray(StackFrame[]::new)
+        );
+        try {
+            dumpFramesIfDebug(frames);
+
+            Object[] locals = (Object[]) getLocals.invoke(frames[0]);
+            assertLongIsInSlots(locals[0], locals[1], longArg);
+            System.out.println("Stayin' alive: " + longArg);
+        } catch (Exception t) {
+            dumpFramesIfNotDebug(frames);
+            throw t;
+        }
+    }
+
+    @Test
+    public static void testUnusedLongArg() throws Exception {
+        if (testUnused) {
+            unusedLong(NEG_LONG_VAL);
+        }
+    }
+
+    private static void unusedLong(long longArg) throws Exception {
+        StackFrame[] frames = extendedWalker.walk(s ->
+            s.filter(f -> "unusedLong".equals(f.getMethodName()))
+             .toArray(StackFrame[]::new)
+        );
+        try {
+            dumpFramesIfDebug(frames);
+
+            final Object[] locals = (Object[]) getLocals.invoke(frames[0]);
+            assertLongIsInSlots(locals[0], locals[1], NEG_LONG_VAL);
+        } catch (Exception t) {
+            dumpFramesIfNotDebug(frames);
+            throw t;
+        }
+    }
+
+    @Test
+    public static void testUsedDoubleArg() throws Exception {
+        usedDouble(LOWER_DOUBLE_VAL);
+        usedDouble(UPPER_DOUBLE_VAL);
+    }
+
+    private static void usedDouble(double doubleArg) throws Exception {
+        StackFrame[] frames = extendedWalker.walk(s ->
+            s.filter(f -> "usedDouble".equals(f.getMethodName()))
+             .toArray(StackFrame[]::new)
+        );
+        try {
+            dumpFramesIfDebug(frames);
+
+            Object[] locals = (Object[]) getLocals.invoke(frames[0]);
+            assertDoubleIsInSlots(locals[0], locals[1], doubleArg);
+            System.out.println("Stayin' alive: " + doubleArg);
+        } catch (Exception t) {
+            dumpFramesIfNotDebug(frames);
+            throw t;
+        }
+    }
+
+    /*******************
+     * Utility Methods *
+     *******************/
+
+    /**
+     * Print stack trace with locals
+     */
+    public static void dumpStackWithLocals(StackFrame...frames) {
+        Stream.of(frames).forEach(LocalsAndOperands::printLocals);
+    }
+
+    public static void dumpFramesIfDebug(StackFrame...frames) {
+        if (debug) { dumpStackWithLocals(frames); }
+    }
+
+    public static void dumpFramesIfNotDebug(StackFrame...frames) {
+        if (!debug) { dumpStackWithLocals(frames); }
+    }
+
+    /**
+     * Print the StackFrame and an indexed list of its locals
+     */
+    public static void printLocals(StackWalker.StackFrame frame) {
+        try {
+            System.out.println("Locals for: " + frame);
+            Object[] locals = (Object[]) getLocals.invoke(frame);
+            for (int i = 0; i < locals.length; i++) {
+                String localStr = null;
+
+                if (primitiveSlot64Class.isInstance(locals[i])) {
+                    localStr = String.format("0x%X",
+                            (Long)primitiveLongValue.invoke(locals[i]));
+                } else if (primitiveSlot32Class.isInstance(locals[i])) {
+                    localStr = String.format("0x%X",
+                            (Integer)primitiveIntValue.invoke(locals[i]));
+                } else if (locals[i] != null) {
+                    localStr = locals[i].toString();
+                }
+                System.out.format("  local %d: %s type %s\n", i, localStr, type(locals[i]));
+            }
+
+            Object[] operands = (Object[]) getOperands.invoke(frame);
+            for (int i = 0; i < operands.length; i++) {
+                System.out.format("  operand %d: %s type %s%n", i, operands[i],
+                                  type(operands[i]));
+            }
+
+            Object[] monitors = (Object[]) getMonitors.invoke(frame);
+            for (int i = 0; i < monitors.length; i++) {
+                System.out.format("  monitor %d: %s%n", i, monitors[i]);
+            }
+        } catch (Exception e) { throw new RuntimeException(e); }
+    }
+
+    private static String type(Object o) {
+        try {
+            if (o == null) {
+                return "null";
+            } else if (primitiveSlotClass.isInstance(o)) {
+                int s = (int)primitiveSize.invoke(o);
+                return s + "-byte primitive";
+            } else {
+                return o.getClass().getName();
+            }
+        } catch(Exception e) { throw new RuntimeException(e); }
+    }
+
+    /*
+     * Check if the PrimitiveValue "primVal" contains the specified value,
+     * either a Long or an Integer.
+     */
+    static boolean primitiveValueEquals(Object primVal, Object expectedVal) {
+        try {
+            if (expectedVal instanceof Long) {
+                assertFalse(is32bit);
+                assertTrue(primitiveSlot64Class.isInstance(primVal));
+                assertTrue(8 == (int)primitiveSize.invoke(primVal));
+                return Objects.equals(primitiveLongValue.invoke(primVal), expectedVal);
+            } else if (expectedVal instanceof Integer) {
+                int expectedInt = (Integer)expectedVal;
+                if (is32bit) {
+                    assertTrue(primitiveSlot32Class.isInstance(primVal),
+                            "expected a PrimitiveSlot32 on 32-bit VM");
+                    assertTrue(4 == (int)primitiveSize.invoke(primVal));
+                    return expectedInt == (int)primitiveIntValue.invoke(primVal);
+                } else {
+                    assertTrue(primitiveSlot64Class.isInstance(primVal),
+                            "expected a PrimitiveSlot64 on 64-bit VM");
+                    assertTrue(8 == (int)primitiveSize.invoke(primVal));
+                    // Look for int expectedVal in high- or low-order 32 bits
+                    long primValLong = (long)primitiveLongValue.invoke(primVal);
+                    return (int)(primValLong & 0x00000000FFFFFFFFL) == expectedInt ||
+                           (int)(primValLong >>> 32) == expectedInt;
+                }
+            } else {
+                throw new RuntimeException("Called with non-Integer/Long: " + expectedVal);
+            }
+        } catch (IllegalAccessException|InvocationTargetException e) {
+            throw new RuntimeException(e);
+        }
+
+    }
+
+    /*
+     * Assert that the expected 2-slot long value is stored somewhere in the
+     * pair of slots.
+     * Throw exception if long value isn't in the two slots given.
+     * Accounts for 32 vs 64 bit, but is lax on endianness (accepts either)
+     */
+    static void assertLongIsInSlots(Object primVal0, Object primVal1, long expected) {
+        try {
+            if (is32bit) {
+                int upper = (int)(expected & 0xFFFFFFFFL);
+                int lower = (int)(expected >> 32);
+
+                if (!((primitiveValueEquals(primVal0, upper) &&
+                       primitiveValueEquals(primVal1, lower)) ||
+                      (primitiveValueEquals(primVal0, lower) &&
+                       primitiveValueEquals(primVal1, upper)))) {
+                    throw new RuntimeException(String.format("0x%X and 0x%X of 0x%016X not found in 0x%X and 0x%X",
+                            upper, lower, expected,
+                            (int)primitiveIntValue.invoke(primVal0),
+                            (int)primitiveIntValue.invoke(primVal1)));
+                }
+            } else {
+                if (!(primitiveValueEquals(primVal0, expected) ||
+                      primitiveValueEquals(primVal1, expected))) {
+                    throw new RuntimeException(String.format("0x%016X not found in 0x%016X or 0x%016X",
+                            expected,
+                            (long)primitiveLongValue.invoke(primVal0),
+                            (long)primitiveLongValue.invoke(primVal1)));
+                }
+            }
+        } catch (IllegalAccessException|InvocationTargetException e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+    static void assertDoubleIsInSlots(Object primVal0, Object primVal1, double expected) {
+        assertLongIsInSlots(primVal0, primVal1, Double.doubleToRawLongBits(expected));
+    }
+}

test/jdk/java/lang/StackWalker/MultiThreadStackWalk.java

@@ -0,0 +1,360 @@
+/*
+ * Copyright (c) 2015, 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.List;
+import java.util.Set;
+import java.util.TreeSet;
+import java.util.concurrent.atomic.AtomicBoolean;
+import java.util.concurrent.atomic.AtomicLong;
+import java.lang.StackWalker.StackFrame;
+import static java.lang.StackWalker.Option.*;
+
+
+/**
+ * @test
+ * @bug 8140450
+ * @summary This test will walk the stack using different methods, called
+ *          from several threads running concurrently.
+ *          Except in the case of MTSTACKSTREAM - which takes a snapshot
+ *          of the stack before walking, all the methods only allow to
+ *          walk the current thread stack.
+ * @run main/othervm MultiThreadStackWalk
+ * @author danielfuchs
+ */
+public class MultiThreadStackWalk {
+
+    static Set<String> infrastructureClasses = new TreeSet<>(Arrays.asList(
+            "java.lang.reflect.Method",
+            "com.sun.javatest.regtest.MainWrapper$MainThread",
+            "java.lang.Thread"
+    ));
+
+
+    static final List<Class<?>> streamPipelines = Arrays.asList(
+            classForName("java.util.stream.AbstractPipeline"),
+            classForName("java.util.stream.TerminalOp")
+    );
+
+    static Class<?> classForName(String name) {
+        try {
+            return Class.forName(name);
+        } catch (ClassNotFoundException e){
+            throw new RuntimeException(e);
+        }
+    }
+
+    private static boolean isStreamPipeline(Class<?> clazz) {
+        for (Class<?> c : streamPipelines) {
+            if (c.isAssignableFrom(clazz)) {
+                return true;
+            }
+        }
+        return false;
+    }
+
+    /**
+     * An object that contains variables pertaining to the execution
+     * of the test within one thread.
+     * A small amount of those variable are shared with sub threads when
+     * the stack walk is executed in parallel - that is when spliterators
+     * obtained from trySplit are handed over to an instance of SplitThread
+     * in order to parallelize thread walking.
+     * @see WalkThread#handOff(MultiThreadStackWalk.Env, java.util.Spliterator, boolean, boolean)
+     * @see Env#split(MultiThreadStackWalk.Env)
+     */
+    public static class Env {
+        final AtomicLong frameCounter;  // private: the counter for the current thread.
+        final long checkMarkAt;         // constant: the point at which we expect to
+                                        // find the marker in consume()
+        final long max;                 // constant: the maximum number of recursive
+                                        // calls to Call.
+        final AtomicBoolean debug ;     // shared: whether debug is active for the
+                                        // instance of Test from which this instance
+                                        // of Env was spawned
+        final AtomicLong markerCalled;  // shared: whether the marker was reached
+        final AtomicLong maxReached;    // shared: whether max was reached
+        final Set<String> unexpected;   // shared: list of unexpected infrastructure
+                                        // classes encountered after max is reached
+
+        public Env(long total, long markAt, AtomicBoolean debug) {
+            this.debug = debug;
+            frameCounter = new AtomicLong();
+            maxReached = new AtomicLong();
+            unexpected = Collections.synchronizedSet(new TreeSet<>());
+            this.max = total+2;
+            this.checkMarkAt = total - markAt + 1;
+            this.markerCalled = new AtomicLong();
+        }
+
+        // Used when delegating part of the stack walking to a sub thread
+        // see WalkThread.handOff.
+        private Env(Env orig, long start) {
+            debug = orig.debug;
+            frameCounter = new AtomicLong(start);
+            maxReached = orig.maxReached;
+            unexpected = orig.unexpected;
+            max = orig.max;
+            checkMarkAt = orig.checkMarkAt;
+            markerCalled = orig.markerCalled;
+        }
+
+        // The stack walk consumer method, where all the checks are
+        // performed.
+        public void consume(StackFrame sfi) {
+            if (frameCounter.get() == 0 && isStreamPipeline(sfi.getDeclaringClass())) {
+                return;
+            }
+
+            final long count = frameCounter.getAndIncrement();
+            final StringBuilder builder = new StringBuilder();
+            builder.append("Declaring class[")
+                   .append(count)
+                   .append("]: ")
+                   .append(sfi.getDeclaringClass());
+            builder.append('\n');
+            builder.append("\t")
+                   .append(sfi.getClassName())
+                   .append(".")
+                   .append(sfi.toStackTraceElement().getMethodName())
+                   .append(sfi.toStackTraceElement().isNativeMethod()
+                           ? "(native)"
+                           : "(" + sfi.toStackTraceElement().getFileName()
+                             +":"+sfi.toStackTraceElement().getLineNumber()+")");
+            builder.append('\n');
+            if (debug.get()) {
+                System.out.print("[debug] " + builder.toString());
+                builder.setLength(0);
+            }
+            if (count == max) {
+                maxReached.incrementAndGet();
+            }
+            if (count  == checkMarkAt) {
+                if (sfi.getDeclaringClass() != MultiThreadStackWalk.Marker.class) {
+                    throw new RuntimeException("Expected Marker at " + count
+                            + ", found " + sfi.getDeclaringClass());
+                }
+            } else {
+                if (count <= 0 && sfi.getDeclaringClass() != MultiThreadStackWalk.Call.class) {
+                    throw new RuntimeException("Expected Call at " + count
+                            + ", found " + sfi.getDeclaringClass());
+                } else if (count > 0 && count < max && sfi.getDeclaringClass() != MultiThreadStackWalk.Test.class) {
+                    throw new RuntimeException("Expected Test at " + count
+                            + ", found " + sfi.getDeclaringClass());
+                } else if (count == max && sfi.getDeclaringClass() != MultiThreadStackWalk.class) {
+                    throw new RuntimeException("Expected MultiThreadStackWalk at "
+                            + count + ", found " + sfi.getDeclaringClass());
+                } else if (count == max &&  !sfi.toStackTraceElement().getMethodName().equals("runTest")) {
+                    throw new RuntimeException("Expected runTest method at "
+                            + count + ", found " + sfi.toStackTraceElement().getMethodName());
+                } else if (count == max+1) {
+                    if (sfi.getDeclaringClass() != MultiThreadStackWalk.WalkThread.class) {
+                        throw new RuntimeException("Expected MultiThreadStackWalk at "
+                            + count + ", found " + sfi.getDeclaringClass());
+                    }
+                    if (count == max && !sfi.toStackTraceElement().getMethodName().equals("run")) {
+                        throw new RuntimeException("Expected main method at "
+                            + count + ", found " + sfi.toStackTraceElement().getMethodName());
+                    }
+                } else if (count > max+1) {
+                    // expect JTreg infrastructure...
+                    if (!infrastructureClasses.contains(sfi.getDeclaringClass().getName())) {
+                        System.err.println("**** WARNING: encountered unexpected infrastructure class at "
+                                + count +": " + sfi.getDeclaringClass().getName());
+                        unexpected.add(sfi.getDeclaringClass().getName());
+                    }
+                }
+            }
+            if (count == 100) {
+                // Maybe we should had some kind of checking inside that lambda
+                // too. For the moment we should be satisfied if it doesn't throw
+                // any exception and doesn't make the outer walk fail...
+                StackWalker.getInstance(RETAIN_CLASS_REFERENCE).forEach(x -> {
+                    StackTraceElement st = x.toStackTraceElement();
+                    StringBuilder b = new StringBuilder();
+                    b.append("*** inner walk: ")
+                            .append(x.getClassName())
+                            .append(st == null ? "- no stack trace element -" :
+                                    ("." + st.getMethodName()
+                                            + (st.isNativeMethod() ? "(native)" :
+                                            "(" + st.getFileName()
+                                                    + ":" + st.getLineNumber() + ")")))
+                            .append('\n');
+                    if (debug.get()) {
+                        System.out.print(b.toString());
+                        b.setLength(0);
+                    }
+                });
+            }
+        }
+    }
+
+    public interface Call {
+        enum WalkType {
+            WALKSTACK,         // use Thread.walkStack
+        }
+        default WalkType getWalkType() { return WalkType.WALKSTACK;}
+        default void walk(Env env) {
+            WalkType walktype = getWalkType();
+            System.out.println("Thread "+ Thread.currentThread().getName()
+                    +" starting walk with " + walktype);
+            switch(walktype) {
+                case WALKSTACK:
+                    StackWalker.getInstance(RETAIN_CLASS_REFERENCE)
+                               .forEach(env::consume);
+                    break;
+                default:
+                    throw new InternalError("Unknown walk type: " + walktype);
+            }
+        }
+        default void call(Env env, Call next, int total, int current, int markAt) {
+            if (current < total) {
+                next.call(env, next, total, current+1, markAt);
+            }
+        }
+    }
+
+    public static class Marker implements Call {
+        final WalkType walkType;
+        Marker(WalkType walkType) {
+            this.walkType = walkType;
+        }
+        @Override
+        public WalkType getWalkType() {
+            return walkType;
+        }
+
+        @Override
+        public void call(Env env, Call next, int total, int current, int markAt) {
+            env.markerCalled.incrementAndGet();
+            if (current < total) {
+                next.call(env, next, total, current+1, markAt);
+            } else {
+                next.walk(env);
+            }
+        }
+    }
+
+    public static class Test implements Call {
+        final Marker marker;
+        final WalkType walkType;
+        final AtomicBoolean debug;
+        Test(WalkType walkType) {
+            this.walkType = walkType;
+            this.marker = new Marker(walkType);
+            this.debug = new AtomicBoolean();
+        }
+        @Override
+        public WalkType getWalkType() {
+            return walkType;
+        }
+        @Override
+        public void call(Env env, Call next, int total, int current, int markAt) {
+            if (current < total) {
+                int nexti = current + 1;
+                Call nextObj = nexti==markAt ? marker : next;
+                nextObj.call(env, next, total, nexti, markAt);
+            } else {
+                walk(env);
+            }
+        }
+    }
+
+    public static Env runTest(Test test, int total, int markAt) {
+        Env env = new Env(total, markAt, test.debug);
+        test.call(env, test, total, 0, markAt);
+        return env;
+    }
+
+    public static void checkTest(Env env, Test test) {
+        String threadName = Thread.currentThread().getName();
+        System.out.println(threadName + ": Marker called: " + env.markerCalled.get());
+        System.out.println(threadName + ": Max reached: " + env.maxReached.get());
+        System.out.println(threadName + ": Frames consumed: " + env.frameCounter.get());
+        if (env.markerCalled.get() == 0) {
+            throw new RuntimeException(Thread.currentThread().getName() + ": Marker was not called.");
+        }
+        if (env.markerCalled.get() > 1) {
+            throw new RuntimeException(Thread.currentThread().getName()
+                    + ": Marker was called more than once: " + env.maxReached.get());
+        }
+        if (!env.unexpected.isEmpty()) {
+            System.out.flush();
+            System.err.println("Encountered some unexpected infrastructure classes below 'main': "
+                    + env.unexpected);
+        }
+        if (env.maxReached.get() == 0) {
+            throw new RuntimeException(Thread.currentThread().getName()
+                    + ": max not reached");
+        }
+        if (env.maxReached.get() > 1) {
+            throw new RuntimeException(Thread.currentThread().getName()
+                    + ": max was reached more than once: " + env.maxReached.get());
+        }
+    }
+
+    static class WalkThread extends Thread {
+        final static AtomicLong walkersCount = new AtomicLong();
+        Throwable failed = null;
+        final Test test;
+        public WalkThread(Test test) {
+            super("WalkThread[" + walkersCount.incrementAndGet() + ", type="
+                    + test.getWalkType() + "]");
+            this.test = test;
+        }
+
+        public void run() {
+            try {
+                Env env = runTest(test, 1000, 10);
+                //waitWalkers(env);
+                checkTest(env, test);
+            } catch(Throwable t) {
+                failed = t;
+            }
+        }
+    }
+
+    public static void main(String[] args) throws Throwable {
+        WalkThread[] threads = new WalkThread[Call.WalkType.values().length*3];
+        Throwable failed = null;
+        for (int i=0; i<threads.length; i++) {
+            Test test = new Test(Call.WalkType.values()[i%Call.WalkType.values().length]);
+            threads[i] = new WalkThread(test);
+        }
+        for (int i=0; i<threads.length; i++) {
+            threads[i].start();
+        }
+        for (int i=0; i<threads.length; i++) {
+            threads[i].join();
+            if (failed == null) failed = threads[i].failed;
+            else if (threads[i].failed == null) {
+                failed.addSuppressed(threads[i].failed);
+            }
+        }
+        if (failed != null) {
+            throw failed;
+        }
+    }
+
+}

test/jdk/java/lang/StackWalker/NativeMethod.java

@@ -0,0 +1,78 @@
+/*
+ * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * @test
+ * @bug 8157892 8157977
+ * @summary Verify file name, line number and bci of native methods
+ * @run main/othervm/native -Xcheck:jni NativeMethod
+ */
+
+import java.lang.StackWalker.Option;
+import java.lang.StackWalker.StackFrame;
+import java.util.List;
+import java.util.stream.Collectors;
+
+public class NativeMethod {
+    public static void main(String... args) throws Exception {
+        new NativeMethod().test();
+    }
+
+    private final StackWalker walker;
+    NativeMethod() {
+        this.walker = StackWalker.getInstance(Option.SHOW_REFLECT_FRAMES);
+    }
+
+    // this native method will invoke NativeMethod::walk method
+    public native void test();
+
+    public void walk() {
+        List<StackFrame> nativeFrames = walker.walk(s ->
+            s.filter(StackFrame::isNativeMethod)
+             .collect(Collectors.toList())
+        );
+
+        assertTrue(nativeFrames.size() > 0, "native frame not found");
+        // find NativeMethod::test native frame
+        nativeFrames.stream().filter(f -> f.isNativeMethod()
+                                            && f.getClassName().equals("NativeMethod")
+                                            && f.getMethodName().equals("test"))
+                    .findFirst()
+                    .orElseThrow(() -> new RuntimeException("NativeMethod::test native method not found"));
+
+        for (StackFrame f : nativeFrames) {
+            assertTrue(f.getFileName() != null, "source file expected to be found");
+            assertTrue(f.getLineNumber() < 0, "line number expected to be unavailable");
+            assertTrue(f.getByteCodeIndex() < 0, "bci expected to be unavailable");
+        }
+    }
+
+    private static void assertTrue(boolean value, String msg) {
+        if (value != true)
+            throw new AssertionError(msg);
+    }
+
+    static {
+        System.loadLibrary("nativeMethod");
+    }
+}

test/jdk/java/lang/StackWalker/ReflectionFrames.java

@@ -0,0 +1,877 @@
+/*
+ * Copyright (c) 2017, 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * @test
+ * @bug 8173898
+ * @summary Basic test for checking filtering of reflection frames
+ * @run testng ReflectionFrames
+ */
+
+import java.lang.StackWalker.StackFrame;
+import java.lang.reflect.Constructor;
+import java.lang.reflect.Method;
+import java.lang.invoke.MethodHandle;
+import java.lang.invoke.MethodHandles;
+import java.lang.invoke.MethodHandles.Lookup;
+import java.lang.invoke.MethodType;
+import java.util.EnumSet;
+import java.util.List;
+import java.util.function.Supplier;
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
+import static java.lang.StackWalker.Option.*;
+
+import org.testng.annotations.DataProvider;
+import org.testng.annotations.Test;
+import static org.testng.Assert.*;
+
+public class ReflectionFrames {
+    final static boolean verbose = false;
+    final static Class<?> REFLECT_ACCESS = findClass("java.lang.reflect.ReflectAccess");
+    final static Class<?> REFLECTION_FACTORY = findClass("jdk.internal.reflect.ReflectionFactory");
+
+    private static Class<?> findClass(String cn) {
+        try {
+            return Class.forName(cn);
+        } catch (ClassNotFoundException e) {
+            throw new AssertionError(e);
+        }
+    }
+
+    /**
+     * This test invokes new StackInspector() directly from
+     * the caller StackInspector.Caller.create method.
+     * It checks that the caller is StackInspector.Caller.
+     * It also checks the expected frames collected
+     * by walking the stack from the default StackInspector()
+     * constructor.
+     * This is done twice, once using a default StackWalker
+     * that hides reflection frames, once using a StackWalker
+     * configured to show reflection frames.
+     */
+    @Test
+    public static void testNewStackInspector() throws Exception {
+        // Sets the default walker which hides reflection
+        // frames.
+        StackInspector.walker.set(StackInspector.walkerHide);
+
+        // Calls the StackInspector.create method through reflection
+        // and check the frames collected in the StackInspector
+        // default constructor.
+        // The create method invokes new StackInspector() directly.
+        // No reflection frame should appear.
+        System.out.println("testNewStackInspector: create");
+
+        StackInspector obj = ((StackInspector)StackInspector.Caller.class
+                             .getMethod("create", How.class)
+                             .invoke(null, How.NEW));
+        assertEquals(obj.collectedFrames,
+                     List.of(StackInspector.class.getName()
+                                 +"::<init>",
+                             StackInspector.Caller.class.getName()
+                                 +"::create",
+                             ReflectionFrames.class.getName()
+                                 +"::testNewStackInspector"));
+        assertEquals(obj.cls, StackInspector.Caller.class);
+        assertEquals(obj.filtered, 0);
+
+        // Calls the StackInspector.reflect method through reflection
+        // and check the frames collected in the StackInspector
+        // default constructor.
+        // The reflect method invokes the create method through
+        // reflection.
+        // The create method invokes new StackInspector() directly.
+        // No reflection frame should appear.
+        System.out.println("testNewStackInspector: reflect");
+
+        obj = ((StackInspector)StackInspector.Caller.class
+                             .getMethod("reflect", How.class)
+                             .invoke(null, How.NEW));
+        assertEquals(obj.collectedFrames,
+                     List.of(StackInspector.class.getName()
+                                 +"::<init>",
+                             StackInspector.Caller.class.getName()
+                                 +"::create",
+                             StackInspector.Caller.class.getName()
+                                 +"::reflect",
+                             ReflectionFrames.class.getName()
+                                 +"::testNewStackInspector"));
+        assertEquals(obj.cls, StackInspector.Caller.class);
+        assertEquals(obj.filtered, 0);
+
+        // Calls the StackInspector.handle method through reflection
+        // and check the frames collected in the StackInspector
+        // default constructor.
+        // The handle method invokes the create method using
+        // a MethodHandle.
+        // The create method invokes new StackInspector() directly.
+        // No reflection frame should appear.
+        System.out.println("testNewStackInspector: handle");
+
+        obj = ((StackInspector)StackInspector.Caller.class
+                             .getMethod("handle", How.class)
+                             .invoke(null, How.NEW));
+        assertEquals(obj.collectedFrames,
+                     List.of(StackInspector.class.getName()
+                                 +"::<init>",
+                             StackInspector.Caller.class.getName()
+                                 +"::create",
+                             StackInspector.Caller.class.getName()
+                                 +"::handle",
+                             ReflectionFrames.class.getName()
+                                 +"::testNewStackInspector"));
+        assertEquals(obj.cls, StackInspector.Caller.class);
+        assertEquals(obj.filtered, 0);
+
+        // Sets a non-default walker configured to show
+        // reflection frames
+        StackInspector.walker.set(StackInspector.walkerShow);
+
+        // Calls the StackInspector.create method through reflection
+        // and check the frames collected in the StackInspector
+        // default constructor.
+        // The create method invokes new StackInspector() directly.
+        // We should see all reflection frames, except the
+        // jdk.internal.reflect frames which we are filtering
+        // out in StackInspector::filter.
+        System.out.println("testNewStackInspector: create: show reflect");
+
+        obj = ((StackInspector)StackInspector.Caller.class
+                             .getMethod("create", How.class)
+                             .invoke(null, How.NEW));
+        assertEquals(obj.collectedFrames,
+                     List.of(StackInspector.class.getName()
+                                 +"::<init>",
+                             StackInspector.Caller.class.getName()
+                                 +"::create",
+                             Method.class.getName()
+                                 +"::invoke",
+                             ReflectionFrames.class.getName()
+                                 +"::testNewStackInspector"));
+        assertEquals(obj.cls, StackInspector.Caller.class);
+        assertNotEquals(obj.filtered, 0);
+
+        // Calls the StackInspector.reflect method through reflection
+        // and check the frames collected in the StackInspector
+        // default constructor.
+        // The reflect method invokes the create method through
+        // reflection.
+        // The create method invokes new StackInspector() directly.
+        // We should see all reflection frames, except the
+        // jdk.internal.reflect frames which we are filtering
+        // out in StackInspector::filter.
+        System.out.println("testNewStackInspector: reflect: show reflect");
+
+        obj = ((StackInspector)StackInspector.Caller.class
+                             .getMethod("reflect", How.class)
+                             .invoke(null, How.NEW));
+        assertEquals(obj.collectedFrames,
+                     List.of(StackInspector.class.getName()
+                                 +"::<init>",
+                             StackInspector.Caller.class.getName()
+                                 +"::create",
+                             Method.class.getName()
+                                 +"::invoke",
+                             StackInspector.Caller.class.getName()
+                                 +"::reflect",
+                             Method.class.getName()
+                                 +"::invoke",
+                             ReflectionFrames.class.getName()
+                                 +"::testNewStackInspector"));
+        assertEquals(obj.cls, StackInspector.Caller.class);
+        assertNotEquals(obj.filtered, 0);
+
+        // Calls the StackInspector.handle method through reflection
+        // and check the frames collected in the StackInspector
+        // default constructor.
+        // The handle method invokes the create method using
+        // MethodHandle.
+        // The create method invokes new StackInspector() directly.
+        // We should see all reflection frames, except the
+        // jdk.internal.reflect frames which we are filtering
+        // out in StackInspector::filter.
+        System.out.println("testNewStackInspector: handle: show reflect");
+
+        obj = ((StackInspector)StackInspector.Caller.class
+                             .getMethod("handle", How.class)
+                             .invoke(null, How.NEW));
+        assertEquals(obj.collectedFrames,
+                     List.of(StackInspector.class.getName()
+                                 +"::<init>",
+                             StackInspector.Caller.class.getName()
+                                 +"::create",
+                             // MethodHandle::invoke remains hidden
+                             StackInspector.Caller.class.getName()
+                                 +"::handle",
+                             Method.class.getName()
+                                 +"::invoke",
+                             ReflectionFrames.class.getName()
+                                 +"::testNewStackInspector"));
+        assertEquals(obj.cls, StackInspector.Caller.class);
+        assertNotEquals(obj.filtered, 0);
+    }
+
+   /**
+     * This test invokes Constructor.newInstance() from
+     * the caller StackInspector.Caller.create method.
+     * It checks that the caller is StackInspector.Caller.
+     * It also checks the expected frames collected
+     * by walking the stack from the default StackInspector()
+     * constructor.
+     * This is done twice, once using a default StackWalker
+     * that hides reflection frames, once using a StackWalker
+     * configured to show reflection frames.
+     */
+    @Test
+    public static void testConstructor() throws Exception {
+        // Sets the default walker which hides reflection
+        // frames.
+        StackInspector.walker.set(StackInspector.walkerHide);
+
+        // Calls the StackInspector.create method through reflection
+        // and check the frames collected in the StackInspector
+        // default constructor.
+        // The create method invokes Constructor.newInstance().
+        // No reflection frame should appear.
+        System.out.println("testConstructor: create");
+
+        StackInspector obj = ((StackInspector)StackInspector.Caller.class
+                             .getMethod("create", How.class)
+                             .invoke(null, How.CONSTRUCTOR));
+        assertEquals(obj.collectedFrames,
+                     List.of(StackInspector.class.getName()
+                                 +"::<init>",
+                             StackInspector.Caller.class.getName()
+                                 +"::create",
+                             ReflectionFrames.class.getName()
+                                 +"::testConstructor"));
+        assertEquals(obj.cls, StackInspector.Caller.class);
+        assertEquals(obj.filtered, 0);
+
+        // Calls the StackInspector.reflect method through reflection
+        // and check the frames collected in the StackInspector
+        // default constructor.
+        // The reflect method invokes the create method through
+        // reflection.
+        // The create method invokes Constructor.newInstance().
+        // No reflection frame should appear.
+        System.out.println("testConstructor: reflect");
+
+        obj = ((StackInspector)StackInspector.Caller.class
+                             .getMethod("reflect", How.class)
+                             .invoke(null, How.CONSTRUCTOR));
+        assertEquals(obj.collectedFrames,
+                     List.of(StackInspector.class.getName()
+                                 +"::<init>",
+                             StackInspector.Caller.class.getName()
+                                 +"::create",
+                             StackInspector.Caller.class.getName()
+                                 +"::reflect",
+                             ReflectionFrames.class.getName()
+                                 +"::testConstructor"));
+        assertEquals(obj.cls, StackInspector.Caller.class);
+        assertEquals(obj.filtered, 0);
+
+        // Calls the StackInspector.handle method through reflection
+        // and check the frames collected in the StackInspector
+        // default constructor.
+        // The handle method invokes the create method using
+        // MethodHandle.
+        // The create method invokes Constructor.newInstance().
+        // No reflection frame should appear.
+        System.out.println("testConstructor: handle");
+
+        obj = ((StackInspector)StackInspector.Caller.class
+                             .getMethod("handle", How.class)
+                             .invoke(null, How.CONSTRUCTOR));
+        assertEquals(obj.collectedFrames,
+                     List.of(StackInspector.class.getName()
+                                 +"::<init>",
+                             StackInspector.Caller.class.getName()
+                                 +"::create",
+                             StackInspector.Caller.class.getName()
+                                 +"::handle",
+                             ReflectionFrames.class.getName()
+                                 +"::testConstructor"));
+        assertEquals(obj.cls, StackInspector.Caller.class);
+        assertEquals(obj.filtered, 0);
+
+        // Sets a non-default walker configured to show
+        // reflection frames
+        StackInspector.walker.set(StackInspector.walkerShow);
+
+        // Calls the StackInspector.create method through reflection
+        // and check the frames collected in the StackInspector
+        // default constructor.
+        // The create method invokes Constructor.newInstance().
+        // We should see all reflection frames, except the
+        // jdk.internal.reflect frames which we are filtering
+        // out in StackInspector::filter.
+        System.out.println("testConstructor: create: show reflect");
+
+        obj = ((StackInspector)StackInspector.Caller.class
+                             .getMethod("create", How.class)
+                             .invoke(null, How.CONSTRUCTOR));
+        assertEquals(obj.collectedFrames,
+                     List.of(StackInspector.class.getName()
+                                 +"::<init>",
+                             Constructor.class.getName()
+                                 +"::newInstanceWithCaller",
+                             Constructor.class.getName()
+                                 +"::newInstance",
+                             StackInspector.Caller.class.getName()
+                                 +"::create",
+                             Method.class.getName()
+                                 +"::invoke",
+                             ReflectionFrames.class.getName()
+                                 +"::testConstructor"));
+        assertEquals(obj.cls, StackInspector.Caller.class);
+        assertNotEquals(obj.filtered, 0);
+
+        // Calls the StackInspector.reflect method through reflection
+        // and check the frames collected in the StackInspector
+        // default constructor.
+        // The reflect method invokes the create method through
+        // reflection.
+        // The create method invokes Constructor.newInstance().
+        // We should see all reflection frames, except the
+        // jdk.internal.reflect frames which we are filtering
+        // out in StackInspector::filter.
+        System.out.println("testConstructor: reflect: show reflect");
+
+        obj = ((StackInspector)StackInspector.Caller.class
+                             .getMethod("reflect", How.class)
+                             .invoke(null, How.CONSTRUCTOR));
+        assertEquals(obj.collectedFrames,
+                     List.of(StackInspector.class.getName()
+                                 +"::<init>",
+                             Constructor.class.getName()
+                                 +"::newInstanceWithCaller",
+                             Constructor.class.getName()
+                                 +"::newInstance",
+                             StackInspector.Caller.class.getName()
+                                 +"::create",
+                             Method.class.getName()
+                                 +"::invoke",
+                             StackInspector.Caller.class.getName()
+                                 +"::reflect",
+                             Method.class.getName()
+                                 +"::invoke",
+                             ReflectionFrames.class.getName()
+                                 +"::testConstructor"));
+        assertEquals(obj.cls, StackInspector.Caller.class);
+        assertNotEquals(obj.filtered, 0);
+
+        // Calls the StackInspector.handle method through reflection
+        // and check the frames collected in the StackInspector
+        // default constructor.
+        // The handle method invokes the create method using
+        // MethodHandle.
+        // The create method invokes Constructor.newInstance().
+        // We should see all reflection frames, except the
+        // jdk.internal.reflect frames which we are filtering
+        // out in StackInspector::filter.
+        System.out.println("testConstructor: handle: show reflect");
+
+        obj = ((StackInspector)StackInspector.Caller.class
+                             .getMethod("handle", How.class)
+                             .invoke(null, How.CONSTRUCTOR));
+        assertEquals(obj.collectedFrames,
+                     List.of(StackInspector.class.getName()
+                                 +"::<init>",
+                             Constructor.class.getName()
+                                 +"::newInstanceWithCaller",
+                             Constructor.class.getName()
+                                 +"::newInstance",
+                             StackInspector.Caller.class.getName()
+                                 +"::create",
+                             // MethodHandle::invoke remains hidden
+                             StackInspector.Caller.class.getName()
+                                 +"::handle",
+                             Method.class.getName()
+                                 +"::invoke",
+                             ReflectionFrames.class.getName()
+                                 +"::testConstructor"));
+        assertEquals(obj.cls, StackInspector.Caller.class);
+        assertNotEquals(obj.filtered, 0);
+    }
+
+   /**
+     * This test invokes StackInspector.class.newInstance() from
+     * the caller StackInspector.Caller.create method. Because
+     * Class.newInstance() is not considered as a
+     * reflection frame, the caller returned by
+     * getCallerClass() should appear to be java.lang.Class
+     * and not StackInspector.Caller.
+     * It also checks the expected frames collected
+     * by walking the stack from the default StackInspector()
+     * constructor.
+     * This is done twice, once using a default StackWalker
+     * that hides reflection frames, once using a StackWalker
+     * configured to show reflection frames.
+     */
+    @Test
+    public static void testNewInstance() throws Exception {
+        // Sets the default walker which hides reflection
+        // frames.
+        StackInspector.walker.set(StackInspector.walkerHide);
+
+        // Calls the StackInspector.create method through reflection
+        // and check the frames collected in the StackInspector
+        // default constructor.
+        // The create method invokes StackInspector.class.newInstance().
+        // No reflection frame should appear, except
+        // Class::newInstance which is not considered as
+        // a reflection frame.
+        System.out.println("testNewInstance: create");
+
+        StackInspector obj = ((StackInspector)StackInspector.Caller.class
+                             .getMethod("create", How.class)
+                             .invoke(null, How.CLASS));
+        assertEquals(obj.collectedFrames,
+                     List.of(StackInspector.class.getName()
+                                 +"::<init>",
+                             REFLECT_ACCESS.getName()
+                                 +"::newInstance",
+                             REFLECTION_FACTORY.getName()
+                                 +"::newInstance",
+                             Class.class.getName()
+                                 +"::newInstance",
+                             StackInspector.Caller.class.getName()
+                                 +"::create",
+                             ReflectionFrames.class.getName()
+                                 +"::testNewInstance"));
+        // Because implementation frames are not filtered, then the
+        // caller is ReflectAccess.class
+        assertEquals(obj.cls, REFLECT_ACCESS);
+        assertEquals(obj.filtered, 0);
+
+        // Calls the StackInspector.reflect method through reflection
+        // and check the frames collected in the StackInspector
+        // default constructor.
+        // The reflect method invokes the create method through
+        // reflection.
+        // The create method invokes StackInspector.class.newInstance().
+        // No reflection frame should appear, except
+        // Class::newInstance which is not considered as
+        // a reflection frame.
+        System.out.println("testNewInstance: reflect");
+
+        obj = ((StackInspector)StackInspector.Caller.class
+                             .getMethod("reflect", How.class)
+                             .invoke(null, How.CLASS));
+        assertEquals(obj.collectedFrames,
+                     List.of(StackInspector.class.getName()
+                                 +"::<init>",
+                             REFLECT_ACCESS.getName()
+                                 +"::newInstance",
+                             REFLECTION_FACTORY.getName()
+                                 +"::newInstance",
+                             Class.class.getName()
+                                 +"::newInstance",
+                             StackInspector.Caller.class.getName()
+                                 +"::create",
+                             StackInspector.Caller.class.getName()
+                                 +"::reflect",
+                             ReflectionFrames.class.getName()
+                                 +"::testNewInstance"));
+
+        // Because implementation frames are not filtered, then the
+        // caller is ReflectAccess.class
+        assertEquals(obj.cls, REFLECT_ACCESS);
+        assertEquals(obj.filtered, 0);
+
+        // Calls the StackInspector.handle method through reflection
+        // and check the frames collected in the StackInspector
+        // default constructor.
+        // The handle method invokes the create method using
+        // reflection.
+        // The create method invokes StackInspector.class.newInstance().
+        // No reflection frame should appear, except
+        // Class::newInstance which is not considered as
+        // a reflection frame.
+        System.out.println("testNewInstance: handle");
+
+        obj = ((StackInspector)StackInspector.Caller.class
+                             .getMethod("handle", How.class)
+                             .invoke(null, How.CLASS));
+        assertEquals(obj.collectedFrames,
+                     List.of(StackInspector.class.getName()
+                                 +"::<init>",
+                             REFLECT_ACCESS.getName()
+                                 +"::newInstance",
+                             REFLECTION_FACTORY.getName()
+                                 +"::newInstance",
+                             Class.class.getName()
+                                 +"::newInstance",
+                             StackInspector.Caller.class.getName()
+                                 +"::create",
+                             StackInspector.Caller.class.getName()
+                                 +"::handle",
+                             ReflectionFrames.class.getName()
+                                 +"::testNewInstance"));
+
+        // Because implementation frames are not filtered, then the
+        // caller is ReflectAccess.class
+        assertEquals(obj.cls, REFLECT_ACCESS);
+        assertEquals(obj.filtered, 0);
+
+        // Sets a non-default walker configured to show
+        // reflection frames
+        StackInspector.walker.set(StackInspector.walkerShow);
+
+        // Calls the StackInspector.create method through reflection
+        // and check the frames collected in the StackInspector
+        // default constructor.
+        // The create method invokes StackInspector.class.newInstance().
+        // We should see all reflection frames, except the
+        // jdk.internal.reflect frames which we are filtering
+        // out in StackInspector::filter.
+        System.out.println("testNewInstance: create: show reflect");
+
+        obj = ((StackInspector)StackInspector.Caller.class
+                             .getMethod("create", How.class)
+                             .invoke(null, How.CLASS));
+        assertEquals(obj.collectedFrames,
+                     List.of(StackInspector.class.getName()
+                                 +"::<init>",
+                             Constructor.class.getName()
+                                 +"::newInstanceWithCaller",
+                             REFLECT_ACCESS.getName()
+                                 +"::newInstance",
+                             Class.class.getName()
+                                 +"::newInstance",
+                             StackInspector.Caller.class.getName()
+                                 +"::create",
+                             Method.class.getName()
+                                 +"::invoke",
+                             ReflectionFrames.class.getName()
+                                 +"::testNewInstance"));
+        // Because implementation frames are not filtered, then the
+        // caller is ReflectAccess.class
+        assertEquals(obj.cls, REFLECT_ACCESS);
+        assertNotEquals(obj.filtered, 0);
+
+        // Calls the StackInspector.reflect method through reflection
+        // and check the frames collected in the StackInspector
+        // default constructor.
+        // The reflect method invokes the create method through
+        // reflection.
+        // The create method invokes StackInspector.class.newInstance().
+        // We should see all reflection frames, except the
+        // jdk.internal.reflect frames which we are filtering
+        // out in StackInspector::filter.
+        System.out.println("testNewInstance: reflect: show reflect");
+
+        obj = ((StackInspector)StackInspector.Caller.class
+                             .getMethod("reflect", How.class)
+                             .invoke(null, How.CLASS));
+        System.out.println(obj.collectedFrames);
+        assertEquals(obj.collectedFrames,
+                     List.of(StackInspector.class.getName()
+                                 +"::<init>",
+                             Constructor.class.getName()
+                                 +"::newInstanceWithCaller",
+                             REFLECT_ACCESS.getName()
+                                 +"::newInstance",
+                             Class.class.getName()
+                                 +"::newInstance",
+                             StackInspector.Caller.class.getName()
+                                 +"::create",
+                             Method.class.getName()
+                                 +"::invoke",
+                             StackInspector.Caller.class.getName()
+                                 +"::reflect",
+                             Method.class.getName()
+                                 +"::invoke",
+                             ReflectionFrames.class.getName()
+                                 +"::testNewInstance"));
+
+        // Because implementation frames are not filtered, then the
+        // caller is ReflectAccess.class
+        assertEquals(obj.cls, REFLECT_ACCESS);
+        assertNotEquals(obj.filtered, 0);
+
+        // Calls the StackInspector.handle method through reflection
+        // and check the frames collected in the StackInspector
+        // default constructor.
+        // The handle method invokes the create method using
+        // MethodHandle.
+        // The create method invokes StackInspector.class.newInstance().
+        // We should see all reflection frames, except the
+        // jdk.internal.reflect frames which we are filtering
+        // out in StackInspector::filter.
+        System.out.println("testNewInstance: handle: show reflect");
+
+        obj = ((StackInspector)StackInspector.Caller.class
+                             .getMethod("handle", How.class)
+                             .invoke(null, How.CLASS));
+        assertEquals(obj.collectedFrames,
+                     List.of(StackInspector.class.getName()
+                                 +"::<init>",
+                             Constructor.class.getName()
+                                 +"::newInstanceWithCaller",
+                             REFLECT_ACCESS.getName()
+                                 +"::newInstance",
+                             Class.class.getName()
+                                 +"::newInstance",
+                             StackInspector.Caller.class.getName()
+                                 +"::create",
+                             // MethodHandle::invoke remains hidden
+                             StackInspector.Caller.class.getName()
+                                 +"::handle",
+                             Method.class.getName()
+                                 +"::invoke",
+                             ReflectionFrames.class.getName()
+                                 +"::testNewInstance"));
+
+        // Because implementation frames are not filtered, then the
+        // caller is ReflectAccess.class
+        assertEquals(obj.cls, REFLECT_ACCESS);
+        assertNotEquals(obj.filtered, 0);
+    }
+
+    @Test
+    public static void testGetCaller() throws Exception {
+        // Sets the default walker which hides reflection
+        // frames.
+        StackInspector.walker.set(StackInspector.walkerHide);
+
+        assertEquals(StackInspector.getCaller(), ReflectionFrames.class);
+        assertEquals(StackInspector.class.getMethod("getCaller").invoke(null),
+                     ReflectionFrames.class);
+
+        // Sets a non-default walker configured to show
+        // reflection frames
+        StackInspector.walker.set(StackInspector.walkerShow);
+
+        assertEquals(StackInspector.getCaller(), ReflectionFrames.class);
+        assertEquals(StackInspector.class.getMethod("getCaller").invoke(null),
+                     ReflectionFrames.class);
+    }
+
+    @Test
+    public static void testReflectCaller() throws Exception {
+        // Sets the default walker which hides reflection
+        // frames.
+        StackInspector.walker.set(StackInspector.walkerHide);
+
+        assertEquals(StackInspector.reflectCaller(), ReflectionFrames.class);
+        assertEquals(StackInspector.class.getMethod("reflectCaller").invoke(null),
+                     ReflectionFrames.class);
+
+        // Sets a non-default walker configured to show
+        // reflection frames
+        StackInspector.walker.set(StackInspector.walkerShow);
+
+        assertEquals(StackInspector.reflectCaller(), ReflectionFrames.class);
+        assertEquals(StackInspector.class.getMethod("reflectCaller").invoke(null),
+                     ReflectionFrames.class);
+    }
+
+    @Test
+    public static void testSupplyCaller() throws Exception {
+        // Sets the default walker which hides reflection
+        // frames.
+        StackInspector.walker.set(StackInspector.walkerHide);
+
+        assertEquals(StackInspector.supplyCaller(), ReflectionFrames.class);
+        assertEquals(StackInspector.class.getMethod("supplyCaller").invoke(null),
+                     ReflectionFrames.class);
+
+        // Sets a non-default walker configured to show
+        // reflection frames
+        StackInspector.walker.set(StackInspector.walkerShow);
+
+        assertEquals(StackInspector.supplyCaller(), ReflectionFrames.class);
+        assertEquals(StackInspector.class.getMethod("supplyCaller").invoke(null),
+                     ReflectionFrames.class);
+    }
+
+    @Test
+    public static void testHandleCaller() throws Exception {
+        // Sets the default walker which hides reflection
+        // frames.
+        StackInspector.walker.set(StackInspector.walkerHide);
+
+        assertEquals(StackInspector.handleCaller(), ReflectionFrames.class);
+        assertEquals(StackInspector.class.getMethod("handleCaller").invoke(null),
+                     ReflectionFrames.class);
+
+        // Sets a non-default walker configured to show
+        // reflection frames
+        StackInspector.walker.set(StackInspector.walkerShow);
+
+        assertEquals(StackInspector.handleCaller(), ReflectionFrames.class);
+        assertEquals(StackInspector.class.getMethod("handleCaller").invoke(null),
+                     ReflectionFrames.class);
+    }
+
+    static enum How { NEW, CONSTRUCTOR, CLASS};
+
+    /**
+     * An object that collect stack frames by walking the stack
+     * (and calling getCallerClass()) from within its constructor.
+     * For the purpose of this test, StackInspector objects are
+     * always created from the nested StackInspector.Caller class,
+     * which should therefore appear as the caller of the
+     * StackInspector constructor.
+     */
+    static class StackInspector {
+        static final StackWalker walkerHide =
+            StackWalker.getInstance(StackWalker.Option.RETAIN_CLASS_REFERENCE);
+        static final StackWalker walkerShow =
+            StackWalker.getInstance(EnumSet.of(
+                           StackWalker.Option.RETAIN_CLASS_REFERENCE,
+                           StackWalker.Option.SHOW_REFLECT_FRAMES));
+        final static ThreadLocal<StackWalker> walker = new ThreadLocal<>() {
+             protected StackWalker initialValue() {
+                 return walkerHide;
+             }
+        };
+
+        List<String> collectedFrames;
+        Class<?> cls = null;
+        boolean stop;
+        int filtered;
+        final boolean filterImplFrames;
+
+        public StackInspector() {
+            stop = false;
+            // if reflection frames are not hidden, we want to
+            // filter implementation frames before collecting
+            // to avoid depending on internal details.
+            filterImplFrames = walker.get() == walkerShow;
+            collectedFrames = walker.get().walk(this::parse);
+            cls = walker.get().getCallerClass();
+        }
+
+        public List<String> collectedFrames() {
+            return collectedFrames;
+        }
+
+        // The takeWhile method arrange for stopping frame collection
+        // as soon as a frame from ReflectionFrames.class is reached.
+        // The first such frame encountered is still included in the
+        // collected frames, but collection stops right after.
+        // This makes it possible to filter out anything above the
+        // the test method frame, such as frames from the test
+        // framework.
+        public boolean takeWhile(StackFrame f) {
+            if (stop) return false;
+            if (verbose) System.out.println("    " + f);
+            stop = stop || f.getDeclaringClass() == ReflectionFrames.class;
+            return true;
+        }
+
+        // filter out implementation frames to avoid depending
+        // on implementation details. If present, Class::newInstance,
+        // Method::invoke and Constructor::newInstance will
+        // still appear in the collected frames, which is
+        // sufficient for the purpose of the test.
+        // In the case where the StackWalker itself is supposed to
+        // filter the reflection frames, then this filter will always
+        // return true. This way, if such a reflection frame appears when
+        // it sjould have been filtered by StackWalker, it will make the
+        // test fail.
+        public boolean filter(StackFrame f) {
+            if (filterImplFrames &&
+                f.getClassName().startsWith("jdk.internal.reflect.")) {
+                filtered++;
+                return false;
+            }
+            if (!verbose) System.out.println("    " + f);
+            return true;
+        }
+
+        public String frame(StackFrame f) {
+            return f.getClassName() + "::" + f.getMethodName();
+        }
+
+        List<String> parse(Stream<StackFrame> s) {
+            return s.takeWhile(this::takeWhile)
+                    .filter(this::filter)
+                    .map(this::frame)
+                    .collect(Collectors.toList());
+        }
+
+        /**
+         * The Caller class is used to create instances of
+         * StackInspector, either direcltly, or throug reflection.
+         */
+        public static class Caller {
+            public static StackInspector create(How how) throws Exception {
+                switch(how) {
+                    case NEW: return new StackInspector();
+                    case CONSTRUCTOR: return StackInspector.class
+                        .getConstructor().newInstance();
+                    case CLASS: return StackInspector.class.newInstance();
+                    default: throw new AssertionError(String.valueOf(how));
+                }
+            }
+            public static StackInspector reflect(How how) throws Exception {
+                return (StackInspector) Caller.class.getMethod("create", How.class)
+                      .invoke(null, how);
+            }
+            public static StackInspector handle(How how) throws Exception {
+                Lookup lookup = MethodHandles.lookup();
+                MethodHandle mh = lookup.findStatic(Caller.class, "create",
+                        MethodType.methodType(StackInspector.class, How.class));
+                try {
+                    return (StackInspector) mh.invoke(how);
+                } catch (Error | Exception x) {
+                    throw x;
+                } catch(Throwable t) {
+                    throw new AssertionError(t);
+                }
+            }
+        }
+
+        public static Class<?> getCaller() throws Exception {
+            return walker.get().getCallerClass();
+        }
+
+        public static Class<?> reflectCaller() throws Exception {
+            return (Class<?>)StackWalker.class.getMethod("getCallerClass")
+                .invoke(walker.get());
+        }
+
+        public static Class<?> supplyCaller() throws Exception {
+            return ((Supplier<Class<?>>)StackInspector.walker.get()::getCallerClass).get();
+        }
+
+        public static Class<?> handleCaller() throws Exception {
+            Lookup lookup = MethodHandles.lookup();
+            MethodHandle mh = lookup.findVirtual(StackWalker.class, "getCallerClass",
+                    MethodType.methodType(Class.class));
+            try {
+                return (Class<?>) mh.invoke(walker.get());
+            } catch (Error | Exception x) {
+                throw x;
+            } catch(Throwable t) {
+                throw new AssertionError(t);
+            }
+        }
+    }
+}

test/jdk/java/lang/StackWalker/SanityTest.java

@@ -0,0 +1,115 @@
+/*
+ * Copyright (c) 2015, 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/**
+ * @test
+ * @bug 8140450 8268829
+ * @summary Sanity test for exception cases
+ * @run junit SanityTest
+ */
+
+import java.util.Collections;
+import java.util.Set;
+import java.util.stream.Stream;
+import static java.lang.StackWalker.Option.*;
+
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.MethodSource;
+import static org.junit.jupiter.api.Assertions.*;
+
+public class SanityTest {
+    @Test
+    public void testNPE() {
+        assertThrows(NullPointerException.class, () ->
+                StackWalker.getInstance((Set<StackWalker.Option>) null));
+        assertThrows(NullPointerException.class, () ->
+                StackWalker.getInstance((StackWalker.Option) null));
+    }
+
+    private static Stream<StackWalker> noRetainClassRef() {
+        return Stream.of(StackWalker.getInstance(), StackWalker.getInstance(DROP_METHOD_INFO));
+    }
+
+    @ParameterizedTest
+    @MethodSource("noRetainClassRef")
+    public void testUOE(StackWalker sw) {
+        assertThrows(UnsupportedOperationException.class, () -> sw.getCallerClass());
+    }
+
+    @Test
+    public void testInvalidEstimateDepth() {
+        assertThrows(IllegalArgumentException.class, () ->
+                StackWalker.getInstance(Collections.emptySet(), 0));
+    }
+
+    @Test
+    public void testNullFunction() {
+        assertThrows(NullPointerException.class, () ->
+                StackWalker.getInstance().walk(null));
+    }
+
+    @Test
+    public void testNullConsumer() {
+        assertThrows(NullPointerException.class, () ->
+                StackWalker.getInstance().forEach(null));
+    }
+
+    @ParameterizedTest
+    @MethodSource("noRetainClassRef")
+    public void testUOEFromGetDeclaringClass(StackWalker sw) {
+        assertThrows(UnsupportedOperationException.class, () ->
+                sw.forEach(StackWalker.StackFrame::getDeclaringClass));
+    }
+
+    @ParameterizedTest
+    @MethodSource("noRetainClassRef")
+    public void testUOEFromGetMethodType(StackWalker sw) {
+        assertThrows(UnsupportedOperationException.class, () ->
+                sw.forEach(StackWalker.StackFrame::getMethodType));
+    }
+
+    private static Stream<StackWalker> noMethodInfo() {
+        return Stream.of(StackWalker.getInstance(DROP_METHOD_INFO),
+                         StackWalker.getInstance(Set.of(DROP_METHOD_INFO, RETAIN_CLASS_REFERENCE)));
+    }
+
+    @ParameterizedTest
+    @MethodSource("noMethodInfo")
+    public void testNoMethodInfo(StackWalker sw) {
+        assertThrows(UnsupportedOperationException.class, () ->
+                sw.forEach(StackWalker.StackFrame::getMethodName));
+        assertThrows(UnsupportedOperationException.class, () ->
+                sw.forEach(StackWalker.StackFrame::getMethodType));
+        assertThrows(UnsupportedOperationException.class, () ->
+                sw.forEach(StackWalker.StackFrame::getDescriptor));
+        assertThrows(UnsupportedOperationException.class, () ->
+                sw.forEach(StackWalker.StackFrame::getByteCodeIndex));
+        assertThrows(UnsupportedOperationException.class, () ->
+                sw.forEach(StackWalker.StackFrame::getFileName));
+        assertThrows(UnsupportedOperationException.class, () ->
+                sw.forEach(StackWalker.StackFrame::isNativeMethod));
+        assertThrows(UnsupportedOperationException.class, () ->
+                sw.forEach(StackWalker.StackFrame::toStackTraceElement));
+    }
+}

test/jdk/java/lang/StackWalker/StackRecorderUtil.java

@@ -0,0 +1,137 @@
+/*
+ * Copyright (c) 2015, 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+import java.lang.StackWalker.Option;
+import java.lang.StackWalker.StackFrame;
+import java.util.*;
+
+/**
+ * Utility class for recording a stack trace for later comparison to
+ * StackWalker results.
+ *
+ * StackTraceElement comparison does not include line number, isNativeMethod
+ */
+public class StackRecorderUtil implements Iterable<StackRecorderUtil.TestFrame> {
+    private List<TestFrame> testFrames = new LinkedList();
+
+    private boolean compareClasses;
+    private boolean compareClassNames = true;
+    private boolean compareMethodNames = true;
+    private boolean compareSTEs;
+
+    public StackRecorderUtil(Set<StackWalker.Option> swOptions) {
+        compareClasses = swOptions.contains(Option.RETAIN_CLASS_REFERENCE);
+        compareSTEs = true;
+    }
+
+    /**
+     * Add a method call to this recorded stack.
+     */
+    public void add(Class declaringClass, String methodName, String fileName) {
+        testFrames.add(0, new TestFrame(declaringClass, methodName, fileName));
+    }
+
+    public int frameCount() { return testFrames.size(); }
+
+    /**
+     * Compare the given StackFrame returned from the StackWalker to the
+     * recorded frame at the given index.
+     *
+     * Tests for equality, as well as functional correctness with respect to
+     * the StackWalker's options (e.g. throws or doesn't throw exceptions)
+     */
+    public void compareFrame(int index, StackFrame sf) {
+        TestFrame tf = testFrames.get(index);
+        if (compareClasses) {
+            if (!tf.declaringClass.equals(sf.getDeclaringClass())) {
+                throw new RuntimeException("Expected class: " +
+                  tf.declaringClass.toString() + ", but got: " +
+                  sf.getDeclaringClass().toString() + ", index: " + index);
+            }
+        } else {
+            boolean caught = false;
+            try {
+                sf.getDeclaringClass();
+            } catch (UnsupportedOperationException e) {
+                caught = true;
+            }
+            if (!caught) {
+                throw new RuntimeException("StackWalker did not have " +
+                  "RETAIN_CLASS_REFERENCE Option, but did not throw " +
+                  "UnsupportedOperationException");
+            }
+        }
+
+        if (compareClassNames && !tf.className().equals(sf.getClassName())) {
+            throw new RuntimeException("Expected class name: " + tf.className() +
+                    ", but got: " + sf.getClassName() + ", index: " + index);
+        }
+        if (compareMethodNames && !tf.methodName.equals(sf.getMethodName())) {
+            throw new RuntimeException("Expected method name: " + tf.methodName +
+                    ", but got: " + sf.getMethodName()  + ", index: " + index);
+        }
+        if (compareSTEs) {
+            StackTraceElement ste = sf.toStackTraceElement();
+            if (!(ste.getClassName().equals(tf.className()) &&
+                  ste.getMethodName().equals(tf.methodName)) &&
+                  ste.getFileName().equals(tf.fileName)) {
+                throw new RuntimeException("Expected StackTraceElement info: " +
+                        tf + ", but got: " + ste);
+            }
+            if (!Objects.equals(ste.getClassName(), sf.getClassName())
+                || !Objects.equals(ste.getMethodName(), sf.getMethodName())
+                || !Objects.equals(ste.getFileName(), sf.getFileName())
+                || !Objects.equals(ste.getLineNumber(), sf.getLineNumber())
+                || !Objects.equals(ste.isNativeMethod(), sf.isNativeMethod())) {
+                throw new RuntimeException("StackFrame and StackTraceElement differ: " +
+                        "sf=" + sf + ", ste=" + ste);
+            }
+        }
+    }
+
+    public Iterator<TestFrame> iterator() {
+        return testFrames.iterator();
+    }
+
+    /**
+     * Class used to record stack frame information.
+     */
+    public static class TestFrame {
+        public Class declaringClass;
+        public String methodName;
+        public String fileName = null;
+
+        public TestFrame (Class declaringClass, String methodName, String fileName) {
+            this.declaringClass = declaringClass;
+            this.methodName = methodName;
+            this.fileName = fileName;
+        }
+        public String className() {
+            return declaringClass.getName();
+        }
+        public String toString() {
+            return "TestFrame: " + className() + "." + methodName +
+                    (fileName == null ? "" : "(" + fileName + ")");
+        }
+    }
+}

test/jdk/java/lang/StackWalker/StackStreamState.java

@@ -0,0 +1,74 @@
+/*
+ * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * @test
+ * @bug 8020968
+ * @summary Basic test for Stream<StackFrame> state
+ * @run main StackStreamState
+ */
+
+import java.lang.StackWalker.StackFrame;
+import java.util.stream.Stream;
+
+public class StackStreamState {
+    public static void main(String... args) {
+        StackStreamState test = new StackStreamState();
+        test.testStatic();
+        test.testInstance();
+        test.testLocal();
+    }
+
+    private static Stream<StackFrame> staticStream;
+    private Stream<StackFrame> instanceStream;
+    private final StackWalker walker = StackWalker.getInstance();
+    void testStatic() {
+        walker.walk(s -> {
+            staticStream = s;
+            return null;
+        });
+        checkStreamState(staticStream);
+    }
+    void testInstance() {
+        walker.walk(s -> {
+            instanceStream = s;
+            return null;
+        });
+        checkStreamState(instanceStream);
+    }
+    void testLocal() {
+        Stream<StackFrame> stream = walker.walk(s -> {
+            return s;
+        });
+        checkStreamState(stream);
+    }
+    void checkStreamState(Stream<StackFrame> stream) {
+        try {
+            stream.count();
+            throw new RuntimeException("IllegalStateException not thrown");
+        } catch (IllegalStateException e) {
+            System.out.println("Got expected IllegalStateException: " + e.getMessage());
+            e.printStackTrace(System.out);
+        }
+    }
+}

test/jdk/java/lang/StackWalker/StackStreamTest.java

@@ -0,0 +1,306 @@
+/*
+ * Copyright (c) 2015, 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+import java.lang.StackWalker.StackFrame;
+import java.util.Arrays;
+import java.util.List;
+import java.util.Optional;
+import java.util.Set;
+import java.util.logging.Logger;
+import java.util.stream.Collectors;
+
+import static java.lang.StackWalker.Option.*;
+
+/**
+ * @test
+ * @bug 8140450 8210375
+ * @summary Stack Stream Test
+ * @modules java.logging
+ * @run main/othervm StackStreamTest
+ */
+public class StackStreamTest {
+    public static void main(String[] argv) throws Exception {
+        new StackStreamTest().test();
+    }
+
+    private static Logger logger = Logger.getLogger("stackstream");
+    public StackStreamTest() {
+    }
+
+    public void test() {
+        A.a();
+    }
+    static class A {
+        public static void a() {
+            B.b();
+        }
+    }
+    static class B {
+        public static void b() {
+            C.c();
+        }
+    }
+    static class C {
+        public static void c() {
+            D.d();
+        }
+    }
+    static class D {
+        public static void d() {
+            E.e();
+        }
+    }
+    static class E {
+        public static void e() {
+            F.f();
+        }
+    }
+    static class F {
+        public static void f() {
+            logger.severe("log message");
+            G.g();
+            new K().k();
+        }
+    }
+
+    private static boolean isTestClass(StackFrame f) {
+        // Filter jtreg frames from the end of the stack
+        return f.getClassName().startsWith("StackStreamTest");
+    }
+
+    static class G {
+        static StackWalker STE_WALKER = StackWalker.getInstance();
+        static StackWalker DEFAULT_WALKER = StackWalker.getInstance();
+
+        private static final List<String> GOLDEN_CLASS_NAMES =
+                Arrays.asList("StackStreamTest$G",
+                              "StackStreamTest$F",
+                              "StackStreamTest$E",
+                              "StackStreamTest$D",
+                              "StackStreamTest$C",
+                              "StackStreamTest$B",
+                              "StackStreamTest$A",
+                              "StackStreamTest",
+                              "StackStreamTest");
+        private static final List<String> GOLDEN_METHOD_NAMES =
+            Arrays.asList("g", "f", "e", "d", "c", "b", "a", "test", "main");
+
+
+        public static void g() {
+
+            System.out.println("Thread dump");
+            Thread.dumpStack();
+
+            caller();
+            firstFrame();
+
+            // Check class names
+            System.out.println("check class names");
+            List<String> sfs = DEFAULT_WALKER.walk(s -> {
+                return s.filter(StackStreamTest::isTestClass)
+                        .map(StackFrame::getClassName)
+                        .collect(Collectors.toList());
+            });
+            equalsOrThrow("class names", sfs, GOLDEN_CLASS_NAMES);
+
+            // Check method names
+            System.out.println("methodNames()");
+            sfs = DEFAULT_WALKER.walk(s -> {
+                return s.filter(StackStreamTest::isTestClass)
+                        .map(StackFrame::getMethodName)
+                        .collect(Collectors.toList());}
+            );
+            equalsOrThrow("method names", sfs, GOLDEN_METHOD_NAMES);
+
+            Exception exc = new Exception("G.g stack");
+            exc.printStackTrace();
+
+            System.out.println("Stream of StackTraceElement");
+            StackWalker.getInstance()
+                .walk(s ->
+                {
+                    s.map(StackFrame::toStackTraceElement)
+                            .forEach(ste -> System.out.println("STE: " + ste));
+                    return null;
+                });
+
+            // Do we need this?
+            System.out.println("Collect StackTraceElement");
+            List<StackTraceElement> stacktrace = STE_WALKER.walk(s ->
+            {
+                // Filter out jtreg frames
+                return s.filter(StackStreamTest::isTestClass)
+                        .collect(Collectors.mapping(StackFrame::toStackTraceElement, Collectors.toList()));
+            });
+            int i=0;
+            for (StackTraceElement s : stacktrace) {
+                System.out.format("  %d: %s%n", i++, s);
+            }
+
+            // Check STEs for correctness
+            checkStackTraceElements(GOLDEN_CLASS_NAMES, GOLDEN_METHOD_NAMES, stacktrace);
+
+            System.out.println("Collect classes");
+            List<Class<?>> classes = StackWalker.getInstance(Set.of(DROP_METHOD_INFO, RETAIN_CLASS_REFERENCE))
+                    .walk(s -> {
+                        return s.map(StackFrame::getDeclaringClass).collect(Collectors.toList());
+                    });
+            for (i=0; i < GOLDEN_CLASS_NAMES.size(); i++) {
+                Class<?> c = classes.get(i);
+                if (!GOLDEN_CLASS_NAMES.get(i).equals(c.getName())) {
+                    throw new RuntimeException("unexpected class at " + i + " " + c.getName() +
+                            " expected " + GOLDEN_CLASS_NAMES.get(i));
+                }
+            }
+        }
+
+        static void checkStackTraceElements(List<String> classNames,
+                                            List<String> methodNames,
+                                            List<StackTraceElement> stes) {
+            if (classNames.size() != methodNames.size() ) {
+                throw new RuntimeException("Test error: classNames and methodNames should be same size");
+            }
+            if (classNames.size() != stes.size()) {
+                dumpSTEInfo(classNames, methodNames, stes);
+                throw new RuntimeException("wrong number of elements in stes");
+            }
+            for (int i = 0; i < classNames.size() ; i++) {
+                if (!classNames.get(i).equals(stes.get(i).getClassName()) ||
+                    !methodNames.get(i).equals(stes.get(i).getMethodName())) {
+                    dumpSTEInfo(classNames, methodNames, stes);
+                    throw new RuntimeException("class & method names don't match");
+                }
+            }
+        }
+
+        static void dumpSTEInfo(List<String> classNames, List<String> methodNames,
+                                List<StackTraceElement> stes) {
+            System.out.println("Observed class, method names:");
+            for (StackTraceElement ste : stes) {
+                System.out.println("  " + ste.getClassName() + ", " + ste.getMethodName());
+            }
+            System.out.println("Expected class, method names:");
+            for (int i = 0; i < classNames.size(); i++) {
+                System.out.println("  " + classNames.get(i) + ", " + methodNames.get(i));
+            }
+        }
+
+        static void firstFrame() {
+            System.out.println("first frame()");
+            StackWalker sw = StackWalker.getInstance(RETAIN_CLASS_REFERENCE);
+            sw.forEach(e -> {
+                System.out.println(e.getClassName() + "," + e.getMethodName());
+            });
+            System.out.println("\n");
+            Optional<StackFrame> frame = sw.walk(s ->
+            {
+                 return s.filter(e -> {
+                            System.err.println(e.getClassName() + " == " +
+                                               e.getClassName().equals("StackStreamTest"));
+                            return e.getClassName().equals("StackStreamTest");
+                        }).findFirst();
+            });
+            Class<?> c = frame.get().getDeclaringClass();
+            System.out.println("\nfirst frame: " + c);
+            if (c != StackStreamTest.class) {
+                throw new RuntimeException("Unexpected first caller class " + c);
+            }
+        }
+    }
+
+    private static <T> void equalsOrThrow(String label, List<T> list, List<T> expected) {
+        System.out.println("List:     " + list);
+        System.out.println("Expected: " + expected);
+        if (!list.equals(expected)) {
+            System.err.println("Observed " + label);
+            for (T s1 : list) {
+                System.out.println("  " + s1);
+            }
+            System.err.println("Expected " + label);
+            for (T s2 : expected) {
+                System.out.println("  " + s2);
+            }
+            throw new RuntimeException("Error with " + label);
+        }
+    }
+
+
+    static class K {
+        void k() {
+            k1();
+        }
+        void k1() {
+            k2();
+        }
+        void k2() {
+            k3();
+        }
+        void k3() {
+            k4();
+        }
+        void k4() {
+            k5();
+        }
+        void k5() {
+            k6();
+        }
+        void k6() {
+            k7();
+        }
+        void k7() {
+            k8();
+        }
+        void k8() {
+            k9();
+        }
+        void k9() {
+            k10();
+        }
+        void k10() {
+            k20();
+        }
+        void k20() {
+            new Caller().test();
+        }
+
+        class Caller {
+            void test() {
+                Class<?> c = StackWalker.getInstance(RETAIN_CLASS_REFERENCE).getCallerClass();
+                System.out.println("\nTesting K class : " + c);
+                Thread.dumpStack();
+                if (c != K.class) {
+                    throw new RuntimeException("Unexpected caller class "+ c);
+                }
+            }
+        }
+    }
+
+    static void caller() {
+        Class<?> c = StackWalker.getInstance(RETAIN_CLASS_REFERENCE).getCallerClass();
+        System.out.println("\ncaller class : " + c);
+        if (c != G.class) {
+            throw new RuntimeException("Unexpected caller class "+ c);
+        }
+    }
+
+}

test/jdk/java/lang/StackWalker/StackWalkTest.java

@@ -0,0 +1,352 @@
+/*
+ * Copyright (c) 2015, 2025, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+import static java.lang.StackWalker.Option.*;
+import java.lang.StackWalker.StackFrame;
+import java.util.Arrays;
+import java.util.EnumSet;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Random;
+import java.util.Set;
+import java.util.TreeSet;
+
+import jdk.test.lib.RandomFactory;
+
+/**
+ * @test
+ * @bug 8140450
+ * @summary Stack Walk Test (use -Dseed=X to set PRNG seed)
+ * @requires test.thread.factory == null
+ * @library /test/lib
+ * @build jdk.test.lib.RandomFactory
+ * @compile StackRecorderUtil.java
+ * @run main/othervm StackWalkTest
+ * @run main/othervm StackWalkTest -random:50
+ * @author danielfuchs, bchristi
+ * @key randomness
+ */
+public class StackWalkTest {
+    private static boolean random = false;
+    private static boolean verbose = false;
+    private static int randomRuns = 50;
+
+    private static final int MAX_RANDOM_DEPTH = 1000;
+
+    static final Set<String> infrastructureClasses = new TreeSet<>(Arrays.asList(
+            "jdk.internal.reflect.DirectMethodHandleAccessor",
+            "java.lang.reflect.Method",
+            "com.sun.javatest.regtest.MainWrapper$MainThread",
+            "com.sun.javatest.regtest.agent.MainWrapper$MainThread",
+            "com.sun.javatest.regtest.agent.MainWrapper$MainTask",
+            "java.lang.Thread"
+    ));
+    static final List<Class<?>> streamPipelines = Arrays.asList(
+        classForName("java.util.stream.AbstractPipeline"),
+        classForName("java.util.stream.TerminalOp")
+    );
+    static Class<?> classForName(String name) {
+        try {
+            return Class.forName(name);
+        } catch (ClassNotFoundException e){
+            throw new RuntimeException(e);
+        }
+    }
+
+    private static boolean isStreamPipeline(Class<?> clazz) {
+        for (Class<?> c : streamPipelines) {
+            if (c.isAssignableFrom(clazz)) {
+                return true;
+            }
+        }
+        return false;
+    }
+
+    StackRecorderUtil recorder;
+    int count = 0;
+    boolean didWalk = false;
+
+    final int estDepth;
+    final Set<StackWalker.Option> swOptions;
+
+    public StackWalkTest() {
+        this(EnumSet.noneOf(StackWalker.Option.class), -1);
+    }
+
+    public StackWalkTest(Set<StackWalker.Option> swOptions) {
+        this(swOptions, -1);
+    }
+
+    public StackWalkTest(int estimatedDepth) {
+        this(EnumSet.noneOf(StackWalker.Option.class), -1);
+    }
+
+    public StackWalkTest(Set<StackWalker.Option> swOptions, int estimatedDepth) {
+        this.swOptions = swOptions;
+        this.estDepth = estimatedDepth;
+    }
+
+    private StackWalker createStackWalker() {
+        // test all StackWalker factory methods
+        if (this.estDepth < 0) {
+            if (swOptions.isEmpty()) {
+                return StackWalker.getInstance();
+            } else {
+                return StackWalker.getInstance(swOptions);
+            }
+        }
+        return StackWalker.getInstance(swOptions, estDepth);
+    }
+    public void consume(StackFrame sf) {
+        if (count == 0 && swOptions.contains(StackWalker.Option.RETAIN_CLASS_REFERENCE)
+                && isStreamPipeline(sf.getDeclaringClass())) {
+            return;
+        }
+        if (verbose) {
+            System.out.println("\t" + sf.getClassName() + "." + sf.getMethodName());
+        }
+        if (count >= recorder.frameCount()) {
+            // We've gone past main()...
+            if (infrastructureClasses.contains(sf.getClassName())) {
+                // safe to ignore
+                return;
+            }
+        }
+        try {
+            recorder.compareFrame(count, sf);
+        } catch (IndexOutOfBoundsException e) {
+            // Extra non-infra frame in stream
+            throw new RuntimeException("extra non-infra stack frame at count "
+                    + count + ": <" + sf + ">", e);
+        }
+        count++;
+    }
+
+    public class Call {
+        public void walk(int total, int markAt) {
+            recorder.add(Call.class, "walk", "StackWalkTest.java");
+            long swFrameCount = createStackWalker().walk(s -> s.count());
+
+            if (verbose) {
+                System.out.println("Call.walk() total=" + total + ", markAt=" + markAt);
+                System.out.println("recorder frames:");
+                for (StackRecorderUtil.TestFrame f : recorder) {
+                    System.out.println("\t" + f.declaringClass + "." + f.methodName);
+                }
+                System.out.println("\nStackWalker recorded " + swFrameCount + " frames");
+                System.out.flush();
+            }
+            long recFrameCount = (long)recorder.frameCount();
+            if (swFrameCount < recFrameCount) {
+                throw new RuntimeException("StackWalker recorded fewer frames ("+
+                        swFrameCount + ") than recorded ("+ recorder.frameCount() +
+                        ") - " + "estimatedDepth set to " + estDepth);
+            }
+            if (verbose) {
+                System.out.println("StackWalker frames:");
+            }
+            createStackWalker().forEach(StackWalkTest.this::consume);
+            didWalk = true;
+        }
+        public void call(int total, int current, int markAt) {
+            recorder.add(Call.class, "call", "StackWalkTest.java");
+            if (current < total) {
+                testCall.call(total, current+1, markAt);
+            } else {
+                walk(total, markAt);
+            }
+        }
+    }
+
+    public class Marker extends Call {
+        @Override
+        public void call(int total, int current, int markAt) {
+            recorder.add(Marker.class, "call", "StackWalkTest.java");
+            if (current < total) {
+                testCall.call(total, current+1, markAt);
+            } else {
+                walk(total, markAt);
+            }
+        }
+    }
+    private Call markerCall = new Marker();
+
+    public class Test extends Call {
+        @Override
+        public void call(int total, int current, int markAt) {
+            recorder.add(Test.class, "call", "StackWalkTest.java");
+            if (current < total) {
+                int nexti = current + 1;
+                if (nexti==markAt) {
+                    markerCall.call(total, nexti, markAt);
+                } else {
+                    testCall.call2(total, nexti, markAt);
+                }
+            } else {
+                walk(total, markAt);
+            }
+        }
+        public void call2(int total, int current, int markAt) {
+            recorder.add(Test.class, "call2", "StackWalkTest.java");
+            if (current < total) {
+                int nexti = current + 1;
+                if (nexti==markAt) {
+                    markerCall.call(total, nexti, markAt);
+                } else {
+                    test2Call.call(total, nexti, markAt);
+                }
+            } else {
+                walk(total, markAt);
+            }
+        }
+    }
+    private Test testCall = new Test();
+
+    /** Inherits call() from Call */
+    public class Test2 extends Call {}
+    private Test2 test2Call = new Test2();
+
+    public void runTest(Class callerClass, String callerMethod, int stackDepth,
+                        int markAt) {
+        if (didWalk) {
+            throw new IllegalStateException("StackWalkTest already used");
+        }
+        // Test may run into StackOverflow when running in -Xcomp mode on deep stack
+        assert stackDepth <= 1000;
+        assert markAt <= stackDepth : "markAt(" + markAt + ") > stackDepth("
+                + stackDepth + ")";
+        System.out.print("runTest(" + swOptions
+                + "), estimatedDepth=" + estDepth);
+
+        recorder = new StackRecorderUtil(swOptions);
+        recorder.add(callerClass, callerMethod, "StackWalkTest.java");
+        recorder.add(StackWalkTest.class, "runTest", "StackWalkTest.java");
+
+        Test test1 = new Test();
+        test1.call(stackDepth, 0, markAt);
+
+        System.out.println(" finished");
+        if (!didWalk) {
+            throw new IllegalStateException("Test wasn't actually performed");
+        }
+    }
+
+    public static void main(String[] args) {
+        String rand = "-random";
+        String randItems = "-random:";
+        for(String arg : args) {
+            if (arg.startsWith(rand)) {
+                random = true;
+                try {
+                    if(arg.startsWith(randItems)) {
+                        randomRuns = Integer.valueOf(arg.substring(randItems.length()));
+                    }
+                } catch(NumberFormatException e) {}
+            } else if("-verbose".equals(arg)) {
+                verbose = true;
+            }
+        }
+        if (random) {
+            Random rng = RandomFactory.getRandom();
+            for (int iters = 0; iters < randomRuns; iters++) {
+                Set<StackWalker.Option> opts = new HashSet<>();
+                if (rng.nextBoolean()) {
+                    opts.add(RETAIN_CLASS_REFERENCE);
+                }
+
+                int depth = 1 + rng.nextInt(MAX_RANDOM_DEPTH);
+
+                StackWalkTest swt;
+                if (rng.nextBoolean() && depth > 1) {
+                    // Test that specifying an estimatedDepth doesn't prevent
+                    // full stack traversal
+                    swt = new StackWalkTest(opts, 1+rng.nextInt(depth-1));
+                } else {
+                    swt = new StackWalkTest(opts);
+                }
+
+                int markAt = rng.nextInt(depth+1);
+                System.out.print(depth + "@" + markAt + " ");
+                System.out.flush();
+                swt.runTest(StackWalkTest.class, "main", depth, markAt);
+            }
+        } else {
+            // Long stack, default maxDepth
+            StackWalkTest swt;
+            swt = new StackWalkTest();
+            swt.runTest(StackWalkTest.class, "main", 1000, 10);
+
+            // Long stack, matching maxDepth
+            swt = new StackWalkTest(2000);
+            swt.runTest(StackWalkTest.class, "main", 1000, 10);
+
+            // Long stack, maximum maxDepth
+            swt = new StackWalkTest(Integer.MAX_VALUE);
+            swt.runTest(StackWalkTest.class, "main", 1000, 10);
+
+            //
+            // Single batch
+            //
+            swt = new StackWalkTest(); // default maxDepth
+            swt.runTest(StackWalkTest.class, "main", 6, 3);
+
+            swt = new StackWalkTest(4); // maxDepth < stack
+            swt.runTest(StackWalkTest.class, "main", 6, 3);
+
+            swt = new StackWalkTest(2); // maxDepth < marker
+            swt.runTest(StackWalkTest.class, "main", 6, 4);
+
+            //
+            // 2 batches
+            //
+            swt = new StackWalkTest(); // default maxDepth
+            swt.runTest(StackWalkTest.class, "main", 24, 10);
+            swt = new StackWalkTest(18); // maxDepth < stack
+            swt.runTest(StackWalkTest.class, "main", 24, 10);
+            swt = new StackWalkTest(8); // maxDepth < marker
+            swt.runTest(StackWalkTest.class, "main", 24, 10);
+
+            //
+            // 3 batch
+            //
+            swt = new StackWalkTest(); // default maxDepth
+            swt.runTest(StackWalkTest.class, "main", 60, 20);
+            swt = new StackWalkTest(35); // maxDepth < stack
+            swt.runTest(StackWalkTest.class, "main", 60, 20);
+            swt = new StackWalkTest(8); // maxDepth < marker
+            swt.runTest(StackWalkTest.class, "main", 60, 20);
+
+            //
+            // StackWalker.Options
+            //
+            swt = new StackWalkTest();
+            swt.runTest(StackWalkTest.class, "main", 50, 10);
+
+            swt = new StackWalkTest(EnumSet.of(RETAIN_CLASS_REFERENCE));
+            swt.runTest(StackWalkTest.class, "main", 80, 40);
+
+            swt = new StackWalkTest(EnumSet.of(RETAIN_CLASS_REFERENCE), 50);
+            swt.runTest(StackWalkTest.class, "main", 1000, 524);
+        }
+    }
+}

test/jdk/java/lang/StackWalker/TestBCI.java

@@ -0,0 +1,168 @@
+/*
+ * Copyright (c) 2016, 2024, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * @test
+ * @bug 8140450
+ * @summary Basic test for the StackWalker::getByteCodeIndex method
+ * @run main TestBCI
+ */
+
+import java.lang.StackWalker.StackFrame;
+import java.io.IOException;
+import java.io.InputStream;
+import java.lang.classfile.Attributes;
+import java.lang.classfile.ClassFile;
+import java.lang.classfile.ClassModel;
+import java.lang.classfile.MethodModel;
+import java.lang.constant.MethodTypeDesc;
+import java.util.Comparator;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Optional;
+import java.util.SortedSet;
+import java.util.TreeSet;
+import java.util.function.Function;
+import java.util.stream.Collectors;
+
+import static java.lang.StackWalker.Option.RETAIN_CLASS_REFERENCE;
+
+public class TestBCI {
+    public static void main(String... args) throws Exception {
+        TestBCI test = new TestBCI(Walker.class);
+        System.out.println("Line number table:");
+        test.methods.values().stream()
+            .sorted(Comparator.comparing(MethodInfo::name).reversed())
+            .forEach(System.out::println);
+
+        // walk the stack
+        test.walk();
+    }
+
+    private final Map<String, MethodInfo> methods;
+    private final Class<?> clazz;
+    TestBCI(Class<?> c) throws IllegalArgumentException, IOException {
+        Map<String, MethodInfo> methods;
+        String filename = c.getName().replace('.', '/') + ".class";
+        try (InputStream in = c.getResourceAsStream(filename)) {
+            var cf = ClassFile.of().parse(in.readAllBytes());
+            methods = cf.methods().stream()
+                .map(m -> new MethodInfo(cf, m))
+                .collect(Collectors.toMap(MethodInfo::name, Function.identity()));
+        }
+        this.clazz = c;
+        this.methods = methods;
+    }
+
+    void walk() {
+        Walker walker = new Walker();
+        walker.m1();
+    }
+
+    void verify(StackFrame frame) {
+        if (frame.getDeclaringClass() != clazz)
+            return;
+
+        int bci = frame.getByteCodeIndex();
+        int lineNumber = frame.getLineNumber();
+        System.out.format("%s.%s bci %d (%s:%d)%n",
+                          frame.getClassName(), frame.getMethodName(), bci,
+                          frame.getFileName(), lineNumber);
+
+        MethodInfo method = methods.get(frame.getMethodName());
+        SortedSet<Integer> values = method.findLineNumbers(bci).get();
+        if (!values.contains(lineNumber)) {
+            throw new RuntimeException("line number for bci: " + bci + " "
+                + lineNumber + " not matched line number table: " + values);
+        }
+    }
+
+    /*
+     * BCIs in the execution stack when StackWalker::forEach is invoked
+     * will cover BCI range in the line number table.
+     */
+    class Walker {
+        final StackWalker walker = StackWalker.getInstance(RETAIN_CLASS_REFERENCE);
+        void m1() {
+            int i = (int)Math.random()+2;
+            m2(i*2);
+        }
+
+        void m2(int i) {
+            i++;
+            m3(i);
+        }
+
+        void m3(int i) {
+            i++; m4(i++);
+        }
+
+        int m4(int i) {
+            walker.forEach(TestBCI.this::verify);
+            return i;
+        }
+    }
+
+    static class MethodInfo {
+        final MethodModel method;
+        final String name;
+        final MethodTypeDesc desc;
+        final Map<Integer, SortedSet<Integer>> bciToLineNumbers = new HashMap<>();
+        MethodInfo(ClassModel cf, MethodModel m) {
+            this.method = m;
+            this.name = m.methodName().stringValue();
+            this.desc = m.methodTypeSymbol();
+            m.code().orElseThrow(() -> new IllegalArgumentException("Missing Code in " + m))
+                    .findAttribute(Attributes.lineNumberTable())
+                    .orElseThrow(() -> new IllegalArgumentException("Missing LineNumberTable in " + m))
+                    .lineNumbers().forEach(entry ->
+                            bciToLineNumbers.computeIfAbsent(entry.startPc(), _ -> new TreeSet<>())
+                                    .add(entry.lineNumber()));
+        }
+
+        String name() {
+            return name;
+        }
+
+        Optional<SortedSet<Integer>> findLineNumbers(int value) {
+            return bciToLineNumbers.entrySet().stream()
+                    .sorted(Map.Entry.comparingByKey(Comparator.reverseOrder()))
+                    .filter(e -> e.getKey().intValue() <= value)
+                    .map(Map.Entry::getValue)
+                    .findFirst();
+        }
+
+        @Override
+        public String toString() {
+            StringBuilder sb = new StringBuilder();
+            sb.append(name);
+            sb.append(desc.displayDescriptor()).append(" ");
+            bciToLineNumbers.entrySet().stream()
+                .sorted(Map.Entry.comparingByKey())
+                .forEach(entry -> sb.append("bci:").append(entry.getKey()).append(" ")
+                                    .append(entry.getValue()).append(" "));
+            return sb.toString();
+        }
+    }
+
+}

test/jdk/java/lang/StackWalker/VerifyStackTrace.java

@@ -0,0 +1,288 @@
+/*
+ * Copyright (c) 2015, 2024, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+import java.lang.reflect.InvocationTargetException;
+import java.security.AccessController;
+import java.security.PrivilegedAction;
+import java.util.EnumSet;
+import java.util.concurrent.atomic.AtomicLong;
+import java.lang.StackWalker.StackFrame;
+import java.lang.invoke.MethodHandle;
+import java.lang.invoke.MethodHandles;
+import java.lang.invoke.MethodType;
+import java.util.Objects;
+
+import static java.lang.StackWalker.Option.*;
+
+/**
+ * @test
+ * @bug 8140450 8197901
+ * @summary Verify stack trace information obtained with respect to StackWalker
+ *          options, when the stack contains lambdas, method handle invoke
+ *          virtual calls, and reflection.
+ * @run main/othervm VerifyStackTrace
+ * @author danielfuchs
+ */
+public class VerifyStackTrace {
+
+    static interface TestCase {
+        StackWalker walker();
+        String description();
+        String expected();
+    }
+    static final class TestCase1 implements TestCase {
+        private final StackWalker walker = StackWalker.getInstance(RETAIN_CLASS_REFERENCE);
+
+        private final String description = "StackWalker.getInstance(" +
+            "StackWalker.Option.RETAIN_CLASS_REFERENCE)";
+
+        // Note: line numbers and lambda hashes will be erased when
+        //       comparing stack traces. However, the stack may change
+        //       if some methods are being renamed in the code base.
+        // If the  JDKcode base changes and the test fails because of that,
+        // then after validating that the actual stack trace obtained
+        // is indeed correct (no frames are skipped that shouldn't)
+        // then you can cut & paste the <-- actual --> stack printed in the
+        // test output in here:
+        private final String expected =
+            "1: VerifyStackTrace.lambda$test$1(VerifyStackTrace.java:209)\n" +
+            "2: VerifyStackTrace$Handle.execute(VerifyStackTrace.java:145)\n" +
+            "3: VerifyStackTrace$Handle.run(VerifyStackTrace.java:158)\n" +
+            "4: VerifyStackTrace.invoke(VerifyStackTrace.java:188)\n" +
+            "5: VerifyStackTrace$1.run(VerifyStackTrace.java:218)\n" +
+            "6: java.base/java.security.AccessController.doPrivileged(AccessController.java:310)\n" +
+            "7: VerifyStackTrace.test(VerifyStackTrace.java:227)\n" +
+            "8: VerifyStackTrace.main(VerifyStackTrace.java:182)\n";
+
+        @Override public StackWalker walker() { return walker;}
+        @Override public String description() { return description;}
+        @Override public String expected()    { return expected;}
+    }
+    static final class TestCase2 implements TestCase {
+        private final StackWalker walker = StackWalker.getInstance(
+                EnumSet.of(RETAIN_CLASS_REFERENCE, SHOW_REFLECT_FRAMES));
+
+        private final String description = "nStackWalker.getInstance(" +
+            "StackWalker.Option.RETAIN_CLASS_REFERENCE, " +
+            "StackWalker.Option.SHOW_REFLECT_FRAMES)";
+
+        // Note: line numbers and lambda hashes will be erased when
+        //       comparing stack traces. However, the stack may change
+        //       if some methods are being renamed in the code base.
+        // If the JDK code base changes and the test fails because of that,
+        // then after validating that the actual stack trace obtained
+        // is indeed correct (no frames are skipped that shouldn't)
+        // then you can cut & paste the <-- actual --> stack printed in the
+        // test output in here (don't forget the final \n):
+        private final String expected =
+            "1: VerifyStackTrace.lambda$test$1(VerifyStackTrace.java:211)\n" +
+            "2: VerifyStackTrace$Handle.execute(VerifyStackTrace.java:147)\n" +
+            "3: VerifyStackTrace$Handle.run(VerifyStackTrace.java:160)\n" +
+            "4: VerifyStackTrace.invoke(VerifyStackTrace.java:190)\n" +
+            "5: java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:94)\n" +
+            "6: java.base/java.lang.reflect.Method.invoke(Method.java:520)\n" +
+            "7: VerifyStackTrace$1.run(VerifyStackTrace.java:220)\n" +
+            "8: java.base/java.security.AccessController.doPrivileged(AccessController.java:310)\n" +
+            "9: VerifyStackTrace.test(VerifyStackTrace.java:229)\n" +
+            "10: VerifyStackTrace.main(VerifyStackTrace.java:185)\n";
+        @Override public StackWalker walker() { return walker;}
+        @Override public String description() { return description;}
+        @Override public String expected()    { return expected;}
+    }
+    static class TestCase3 implements TestCase {
+        private final StackWalker walker = StackWalker.getInstance(
+                EnumSet.of(RETAIN_CLASS_REFERENCE, SHOW_HIDDEN_FRAMES));
+
+        private final String description = "StackWalker.getInstance(" +
+            "StackWalker.Option.RETAIN_CLASS_REFERENCE, " +
+            "StackWalker.Option.SHOW_HIDDEN_FRAMES)";
+
+        // Note: line numbers and lambda hashes will be erased when
+        //       comparing stack traces. However, the stack may change
+        //       if some methods are being renamed in the code base.
+        // If the JDK code base changes and the test fails because of that,
+        // then after validating that the actual stack trace obtained
+        // is indeed correct (no frames are skipped that shouldn't)
+        // then you can cut & paste the <-- actual --> stack printed in the
+        // test output in here (don't forget the final \n):
+        private final String expected =
+            "1: VerifyStackTrace.lambda$test$1(VerifyStackTrace.java:280)\n" +
+            "2: VerifyStackTrace$$Lambda/0x0000000801001848.run(Unknown Source)\n" +
+            "3: VerifyStackTrace$Handle.execute(VerifyStackTrace.java:206)\n" +
+            "4: java.base/java.lang.invoke.DirectMethodHandle$Holder.invokeVirtual(DirectMethodHandle$Holder)\n" +
+            "5: java.base/java.lang.invoke.LambdaForm$MH/0x0000000801004800.invoke_MT(LambdaForm$MH)\n" +
+            "6: VerifyStackTrace$Handle.run(VerifyStackTrace.java:219)\n" +
+            "7: VerifyStackTrace.invoke(VerifyStackTrace.java:259)\n" +
+            "8: java.base/java.lang.invoke.LambdaForm$DMH/0x0000000801002000.invokeStatic(LambdaForm$DMH)\n" +
+            "9: java.base/java.lang.invoke.LambdaForm$MH/0x0000000801003000.invoke(LambdaForm$MH)\n" +
+            "10: java.base/java.lang.invoke.Invokers$Holder.invokeExact_MT(Invokers$Holder)\n" +
+            "11: java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invokeImpl(DirectMethodHandleAccessor.java:211)\n" +
+            "12: java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:122)\n" +
+            "13: java.base/java.lang.reflect.Method.invoke(Method.java:573)\n" +
+            "14: VerifyStackTrace$1.run(VerifyStackTrace.java:292)\n" +
+            "15: java.base/java.security.AccessController.doPrivileged(AccessController.java:312)\n" +
+            "16: VerifyStackTrace.test(VerifyStackTrace.java:301)\n" +
+            "17: VerifyStackTrace.main(VerifyStackTrace.java:254)\n";
+
+        @Override public StackWalker walker() { return walker;}
+        @Override public String description() { return description;}
+        @Override public String expected()    { return expected;}
+    }
+
+    static final class TestCase4 extends TestCase3 {
+        private final StackWalker walker = StackWalker.getInstance(
+                EnumSet.of(RETAIN_CLASS_REFERENCE, SHOW_HIDDEN_FRAMES, SHOW_REFLECT_FRAMES));
+
+        private final String description = "StackWalker.getInstance(" +
+            "StackWalker.Option.RETAIN_CLASS_REFERENCE, " +
+            "StackWalker.Option.SHOW_HIDDEN_FRAMES, " +
+            "StackWalker.Option.SHOW_REFLECT_FRAMES)";
+
+        @Override public StackWalker walker() {return walker;}
+        @Override public String description() {return description;}
+    }
+
+    public static class Handle implements Runnable {
+
+        Runnable impl;
+        public Handle(Runnable run) {
+            this.impl = run;
+        }
+
+        public void execute(Runnable run) {
+            run.run();
+        }
+
+        public void run() {
+            MethodHandles.Lookup lookup = MethodHandles.lookup();
+            MethodHandle handle = null;
+            try {
+                handle = lookup.findVirtual(Handle.class, "execute",
+                        MethodType.methodType(void.class, Runnable.class));
+            } catch(NoSuchMethodException | IllegalAccessException x) {
+                throw new RuntimeException(x);
+            }
+            try {
+                handle.invoke(this, impl);
+            } catch(Error | RuntimeException x) {
+                throw x;
+            } catch(Throwable t) {
+                throw new RuntimeException(t);
+            }
+        }
+    }
+
+    static String prepare(String produced, boolean eraseSensitiveInfo) {
+        if (eraseSensitiveInfo) {
+            // Erase sensitive information before comparing:
+            // comparing line numbers is too fragile, so we just erase them
+            // out before comparing. We also erase the hash-like names of
+            // synthetic frames introduced by lambdas & method handles
+            return produced.replaceAll(":[1-9][0-9]*\\)", ":00)")
+                    .replaceAll("/0x[0-9a-f]+\\.run", "/xxxxxxxx.run")
+                    .replaceAll("/0x[0-9a-f]+\\.invoke", "/xxxxxxxx.invoke")
+                    // LFs may or may not be pre-generated, making frames differ
+                    .replaceAll("DirectMethodHandle\\$Holder", "LambdaForm\\$DMH")
+                    .replaceAll("Invokers\\$Holder", "LambdaForm\\$MH")
+                    .replaceAll("MH\\.invoke", "MH/xxxxxxxx.invoke")
+                    // invoke frames may or may not have basic method type
+                    // information encoded for diagnostic purposes
+                    .replaceAll("xx\\.invoke([A-Za-z]*)_[A-Z_]+", "xx.invoke$1")
+                    .replaceAll("\\$[0-9]+", "\\$??");
+        } else {
+            return produced;
+        }
+    }
+
+
+    public static void main(String[] args) {
+        test(new TestCase1());
+        test(new TestCase2());
+        test(new TestCase3());
+        test(new TestCase4());
+    }
+
+    public static void invoke(Runnable run) {
+        run.run();
+    }
+
+    static final class Recorder {
+        boolean found; // stop recording after main
+        public void recordSTE(long counter, StringBuilder s, StackFrame f) {
+            if (found) return;
+            found = VerifyStackTrace.class.equals(f.getDeclaringClass()) &&
+                    "main".equals(f.getMethodName());
+            String line = String.format("%d: %s", counter, f.toStackTraceElement());
+            s.append(line).append('\n');
+            System.out.println(line);
+        }
+    }
+
+
+    static void test(TestCase test) {
+        System.out.println("\nTesting: " + test.description());
+        final AtomicLong counter = new AtomicLong();
+        final StringBuilder builder = new StringBuilder();
+        final Recorder recorder = new Recorder();
+        final Runnable run = () -> test.walker().forEach(
+                f -> recorder.recordSTE(counter.incrementAndGet(), builder, f));
+        final Handle handle = new Handle(run);
+
+        // We're not using lambda on purpose here. We want the anonymous
+        // class on the stack.
+        PrivilegedAction<Object> pa = new PrivilegedAction<Object>() {
+            @Override
+            public Object run() {
+                try {
+                    return VerifyStackTrace.class
+                            .getMethod("invoke", Runnable.class)
+                            .invoke(null, handle);
+                } catch (NoSuchMethodException
+                        | IllegalAccessException
+                        | InvocationTargetException ex) {
+                    System.out.flush();
+                    throw new RuntimeException(ex);
+                }
+            }
+        };
+        AccessController.doPrivileged(pa);
+        System.out.println("Main found: " + recorder.found);
+        if (!Objects.equals(prepare(test.expected(), true), prepare(builder.toString(), true))) {
+            System.out.flush();
+            try {
+                // sleep to make it less likely that System.out & System.err will
+                // interleave.
+                Thread.sleep(1000);
+            } catch (InterruptedException ex) {
+            }
+            System.err.println("\nUnexpected stack trace: "
+                    + "\n<!-- expected -->\n"
+                    + prepare(test.expected(), true)
+                    + "\n<--  actual -->\n"
+                    + prepare(builder.toString(), false));
+            throw new RuntimeException("Unexpected stack trace  for: " + test.description());
+        }
+    }
+
+
+}

test/jdk/java/lang/StackWalker/WalkFunction.java

@@ -0,0 +1,89 @@
+/*
+ * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * @test
+ * @bug 8020968
+ * @summary Sanity test for Function wildcard signature
+ * @run main WalkFunction
+ */
+
+import java.lang.StackWalker.StackFrame;
+import java.util.Optional;
+import java.util.function.Function;
+import java.util.stream.Stream;
+
+public class WalkFunction {
+    private static final StackWalker walker = StackWalker.getInstance();
+
+    public static void main(String... args) throws Exception {
+        testFunctions();
+        testWildcards();
+        walker.walk(counter());
+        walker.walk(wildCounter());
+    }
+
+    private static void testFunctions() {
+        walker.walk(Stream::count);
+
+        try {
+            walker.walk(null);
+            throw new RuntimeException("NPE expected");
+        } catch (NullPointerException e) {}
+
+        Optional<StackFrame> result = walker.walk(WalkFunction::reduce);
+        if (!result.get().getClassName().equals(WalkFunction.class.getName())) {
+            throw new RuntimeException(result.get() + " expected: " + WalkFunction.class.getName());
+        }
+    }
+
+    static Optional<StackFrame> reduce(Stream<StackFrame> stream) {
+        return stream.reduce((r,f) -> r.getClassName().compareTo(f.getClassName()) > 0 ? f : r);
+    }
+
+    private static void testWildcards() {
+        Function<? super Stream<? extends  StackFrame>, Void> f1 = WalkFunction::function;
+        Function<? super Stream<? super StackFrame>, Void> f2 = WalkFunction::function;
+        Function<? super Stream<StackFrame>, Void> f3 = WalkFunction::function;
+        Function<Stream<? extends StackFrame>, Void> f4 = WalkFunction::function;
+        Function<Stream<? super StackFrame>, Void> f5 = WalkFunction::function;
+        Function<Stream<StackFrame>, Void> f6 = WalkFunction::function;
+        walker.walk(f1);
+        walker.walk(f2);
+        walker.walk(f3);
+        walker.walk(f4);
+        walker.walk(f5);
+        walker.walk(f6);
+    }
+
+    private static Void function(Stream<?> s) {
+        return null;
+    }
+
+    private static Function<Stream<?>, Long> wildCounter() {
+        return Stream::count;
+    }
+    private static <T> Function<Stream<T>, Long> counter() {
+        return Stream::count;
+    }
+}

test/jdk/java/lang/StackWalker/libnativeMethod.c

@@ -0,0 +1,59 @@
+/*
+ * Copyright (c) 2021, 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "jni.h"
+
+static jclass test_class;
+static jmethodID mid;
+static jint current_jni_version = JNI_VERSION_19;
+
+JNIEXPORT jint JNICALL
+JNI_OnLoad(JavaVM *vm, void *reserved) {
+    JNIEnv *env;
+    jclass cl;
+
+    (*vm)->GetEnv(vm, (void **) &env, current_jni_version);
+
+    cl = (*env)->FindClass(env, "NativeMethod");
+    test_class = (*env)->NewGlobalRef(env, cl);
+    mid = (*env)->GetMethodID(env, test_class, "walk", "()V");
+
+    return current_jni_version;
+}
+
+/*
+ * Class:     NativeMethod
+ * Method:    test
+ * Signature: ()V
+ */
+JNIEXPORT void JNICALL Java_NativeMethod_test(JNIEnv *env, jobject obj) {
+    (*env)->CallVoidMethod(env, obj, mid);
+
+    if ((*env)->ExceptionCheck(env)) {
+        (*env)->ExceptionDescribe(env);
+        (*env)->FatalError(env, "Exception thrown");
+    }
+}