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.
2026-03-26 17:11:57 -04:00 · 2026-03-26 17:11:57 -04:00 · 0a580b313d
commit 0a580b313d
70422 changed files with 17213626 additions and 0 deletions
--- a/test/jdk/java/foreign/TestDowncallStack.java
+++ b/test/jdk/java/foreign/TestDowncallStack.java
@ -0,0 +1,81 @@
+/*
+ * Copyright (c) 2022, 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
+ * @modules java.base/jdk.internal.foreign
+ * @build NativeTestHelper CallGeneratorHelper TestDowncallBase
+ *
+ * @run testng/othervm/native -Xcheck:jni -XX:+IgnoreUnrecognizedVMOptions -XX:-VerifyDependencies
+ *   --enable-native-access=ALL-UNNAMED -Dgenerator.sample.factor=17
+ *   TestDowncallStack
+ */
+
+import org.testng.annotations.Test;
+
+import java.lang.foreign.*;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.function.Consumer;
+
+import static org.testng.Assert.assertEquals;
+
+public class TestDowncallStack extends TestDowncallBase {
+
+    static {
+        System.loadLibrary("TestDowncallStack");
+    }
+
+    @Test(dataProvider="functions", dataProviderClass=CallGeneratorHelper.class)
+    public void testDowncallStack(int count, String fName, CallGeneratorHelper.Ret ret,
+                                  List<CallGeneratorHelper.ParamType> paramTypes,
+                                  List<CallGeneratorHelper.StructFieldType> fields) throws Throwable {
+        List<Consumer<Object>> checks = new ArrayList<>();
+        MemorySegment addr = findNativeOrThrow("s" + fName);
+        FunctionDescriptor descriptor = functionStack(ret, paramTypes, fields);
+        try (Arena arena = Arena.ofShared()) {
+            Object[] args = makeArgsStack(arena, descriptor, checks);
+            boolean needsScope = descriptor.returnLayout().map(GroupLayout.class::isInstance).orElse(false);
+            SegmentAllocator allocator = needsScope ?
+                    arena :
+                    THROWING_ALLOCATOR;
+            Object res = doCall(addr, allocator, descriptor, args);
+            if (ret == CallGeneratorHelper.Ret.NON_VOID) {
+                checks.forEach(c -> c.accept(res));
+                if (needsScope) {
+                    // check that return struct has indeed been allocated in the native scope
+                    assertEquals(((MemorySegment)res).scope(), arena.scope());
+                }
+            }
+        }
+    }
+
+    static FunctionDescriptor functionStack(Ret ret, List<ParamType> params, List<StructFieldType> fields) {
+        return function(ret, params, fields, STACK_PREFIX_LAYOUTS);
+    }
+
+    static Object[] makeArgsStack(Arena arena, FunctionDescriptor descriptor, List<Consumer<Object>> checks) {
+        return makeArgs(arena, descriptor, checks, STACK_PREFIX_LAYOUTS.size());
+    }
+
+}