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/lang/instrument/GetObjectSizeIntrinsicsTest.java
+++ b/test/jdk/java/lang/instrument/GetObjectSizeIntrinsicsTest.java
@ -0,0 +1,487 @@
+/*
+ * Copyright (c) 2020, 2024, Red Hat, Inc. 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 8253525
+ * @summary Test for fInst.getObjectSize with 32-bit compressed oops
+ * @library /test/lib
+ *
+ * @build jdk.test.whitebox.WhiteBox
+ * @run build GetObjectSizeIntrinsicsTest
+ * @run shell MakeJAR.sh basicAgent
+ *
+ * @run driver jdk.test.lib.helpers.ClassFileInstaller jdk.test.whitebox.WhiteBox
+ *
+ * @run main/othervm -Xmx128m
+ *                   -XX:+UnlockDiagnosticVMOptions -XX:+AbortVMOnCompilationFailure -XX:+WhiteBoxAPI -Xbootclasspath/a:.
+ *                   -Xint
+ *                   -javaagent:basicAgent.jar GetObjectSizeIntrinsicsTest GetObjectSizeIntrinsicsTest
+ *
+ * @run main/othervm -Xmx128m
+ *                   -XX:+UnlockDiagnosticVMOptions -XX:+AbortVMOnCompilationFailure -XX:+WhiteBoxAPI -Xbootclasspath/a:.
+ *                   -Xbatch -XX:TieredStopAtLevel=1
+ *                   -javaagent:basicAgent.jar GetObjectSizeIntrinsicsTest GetObjectSizeIntrinsicsTest
+ *
+ * @run main/othervm -Xmx128m
+ *                   -XX:+UnlockDiagnosticVMOptions -XX:+AbortVMOnCompilationFailure -XX:+WhiteBoxAPI -Xbootclasspath/a:.
+ *                   -Xbatch -XX:-TieredCompilation
+ *                   -javaagent:basicAgent.jar GetObjectSizeIntrinsicsTest GetObjectSizeIntrinsicsTest
+ */
+
+/*
+ * @test
+ * @summary Test for fInst.getObjectSize with zero-based compressed oops
+ * @library /test/lib
+ * @requires vm.bits == 64
+ *
+ * @build jdk.test.whitebox.WhiteBox
+ * @run build GetObjectSizeIntrinsicsTest
+ * @run shell MakeJAR.sh basicAgent
+ *
+ * @run driver jdk.test.lib.helpers.ClassFileInstaller jdk.test.whitebox.WhiteBox
+ *
+ * @run main/othervm -Xmx4g
+ *                   -XX:+UnlockDiagnosticVMOptions -XX:+AbortVMOnCompilationFailure -XX:+WhiteBoxAPI -Xbootclasspath/a:.
+ *                   -Xint
+ *                   -javaagent:basicAgent.jar GetObjectSizeIntrinsicsTest GetObjectSizeIntrinsicsTest
+ *
+ * @run main/othervm -Xmx4g
+ *                   -XX:+UnlockDiagnosticVMOptions -XX:+AbortVMOnCompilationFailure -XX:+WhiteBoxAPI -Xbootclasspath/a:.
+ *                   -Xbatch -XX:TieredStopAtLevel=1
+ *                   -javaagent:basicAgent.jar GetObjectSizeIntrinsicsTest GetObjectSizeIntrinsicsTest
+ *
+ * @run main/othervm -Xmx4g
+ *                   -XX:+UnlockDiagnosticVMOptions -XX:+AbortVMOnCompilationFailure -XX:+WhiteBoxAPI -Xbootclasspath/a:.
+ *                   -Xbatch -XX:-TieredCompilation
+ *                   -javaagent:basicAgent.jar GetObjectSizeIntrinsicsTest GetObjectSizeIntrinsicsTest
+ */
+
+/*
+ * @test
+ * @summary Test for fInst.getObjectSize without compressed oops
+ * @library /test/lib
+ * @requires vm.bits == 64
+ *
+ * @build jdk.test.whitebox.WhiteBox
+ * @run build GetObjectSizeIntrinsicsTest
+ * @run shell MakeJAR.sh basicAgent
+ *
+ * @run driver jdk.test.lib.helpers.ClassFileInstaller jdk.test.whitebox.WhiteBox
+ *
+ * @run main/othervm -Xmx128m -XX:-UseCompressedOops
+ *                   -XX:+UnlockDiagnosticVMOptions -XX:+AbortVMOnCompilationFailure -XX:+WhiteBoxAPI -Xbootclasspath/a:.
+ *                   -Xint
+ *                   -javaagent:basicAgent.jar GetObjectSizeIntrinsicsTest GetObjectSizeIntrinsicsTest
+ *
+ * @run main/othervm -Xmx128m -XX:-UseCompressedOops
+ *                   -XX:+UnlockDiagnosticVMOptions -XX:+AbortVMOnCompilationFailure -XX:+WhiteBoxAPI -Xbootclasspath/a:.
+ *                   -Xbatch -XX:TieredStopAtLevel=1
+ *                   -javaagent:basicAgent.jar GetObjectSizeIntrinsicsTest GetObjectSizeIntrinsicsTest
+ *
+ * @run main/othervm -Xmx128m -XX:-UseCompressedOops
+ *                   -XX:+UnlockDiagnosticVMOptions -XX:+AbortVMOnCompilationFailure -XX:+WhiteBoxAPI -Xbootclasspath/a:.
+ *                   -Xbatch -XX:-TieredCompilation
+ *                   -javaagent:basicAgent.jar GetObjectSizeIntrinsicsTest GetObjectSizeIntrinsicsTest
+ */
+
+/*
+ * @test
+ * @summary Test for fInst.getObjectSize with 32-bit compressed oops
+ * @library /test/lib
+ * @requires vm.debug
+ *
+ * @build jdk.test.whitebox.WhiteBox
+ * @run build GetObjectSizeIntrinsicsTest
+ * @run shell MakeJAR.sh basicAgent
+ *
+ * @run driver jdk.test.lib.helpers.ClassFileInstaller jdk.test.whitebox.WhiteBox
+ *
+ * @run main/othervm -Xmx128m
+ *                   -XX:+UnlockDiagnosticVMOptions -XX:+AbortVMOnCompilationFailure -XX:+WhiteBoxAPI -Xbootclasspath/a:.
+ *                   -XX:FastAllocateSizeLimit=0
+ *                   -Xint
+ *                   -javaagent:basicAgent.jar GetObjectSizeIntrinsicsTest GetObjectSizeIntrinsicsTest
+ *
+ * @run main/othervm -Xmx128m
+ *                   -XX:+UnlockDiagnosticVMOptions -XX:+AbortVMOnCompilationFailure -XX:+WhiteBoxAPI -Xbootclasspath/a:.
+ *                   -XX:FastAllocateSizeLimit=0
+ *                   -Xbatch -XX:TieredStopAtLevel=1
+ *                   -javaagent:basicAgent.jar GetObjectSizeIntrinsicsTest GetObjectSizeIntrinsicsTest
+ *
+ * @run main/othervm -Xmx128m
+ *                   -XX:+UnlockDiagnosticVMOptions -XX:+AbortVMOnCompilationFailure -XX:+WhiteBoxAPI -Xbootclasspath/a:.
+ *                   -XX:FastAllocateSizeLimit=0
+ *                   -Xbatch -XX:-TieredCompilation
+ *                   -javaagent:basicAgent.jar GetObjectSizeIntrinsicsTest GetObjectSizeIntrinsicsTest
+ */
+
+/*
+ * @test
+ * @summary Test for fInst.getObjectSize with zero-based compressed oops
+ * @library /test/lib
+ * @requires vm.bits == 64
+ * @requires vm.debug
+ *
+ * @build jdk.test.whitebox.WhiteBox
+ * @run build GetObjectSizeIntrinsicsTest
+ * @run shell MakeJAR.sh basicAgent
+ *
+ * @run driver jdk.test.lib.helpers.ClassFileInstaller jdk.test.whitebox.WhiteBox
+ *
+ * @run main/othervm -Xmx4g
+ *                   -XX:+UnlockDiagnosticVMOptions -XX:+AbortVMOnCompilationFailure -XX:+WhiteBoxAPI -Xbootclasspath/a:.
+ *                   -XX:FastAllocateSizeLimit=0
+ *                   -Xint
+ *                   -javaagent:basicAgent.jar GetObjectSizeIntrinsicsTest GetObjectSizeIntrinsicsTest
+ *
+ * @run main/othervm -Xmx4g
+ *                   -XX:+UnlockDiagnosticVMOptions -XX:+AbortVMOnCompilationFailure -XX:+WhiteBoxAPI -Xbootclasspath/a:.
+ *                   -XX:FastAllocateSizeLimit=0
+ *                   -Xbatch -XX:TieredStopAtLevel=1
+ *                   -javaagent:basicAgent.jar GetObjectSizeIntrinsicsTest GetObjectSizeIntrinsicsTest
+ *
+ * @run main/othervm -Xmx4g
+ *                   -XX:+UnlockDiagnosticVMOptions -XX:+AbortVMOnCompilationFailure -XX:+WhiteBoxAPI -Xbootclasspath/a:.
+ *                   -XX:FastAllocateSizeLimit=0
+ *                   -Xbatch -XX:-TieredCompilation
+ *                   -javaagent:basicAgent.jar GetObjectSizeIntrinsicsTest GetObjectSizeIntrinsicsTest
+ */
+
+/*
+ * @test
+ * @summary Test for fInst.getObjectSize without compressed oops
+ * @library /test/lib
+ * @requires vm.bits == 64
+ * @requires vm.debug
+ *
+ * @build jdk.test.whitebox.WhiteBox
+ * @run build GetObjectSizeIntrinsicsTest
+ * @run shell MakeJAR.sh basicAgent
+ *
+ * @run driver jdk.test.lib.helpers.ClassFileInstaller jdk.test.whitebox.WhiteBox
+ *
+ * @run main/othervm -Xmx128m -XX:-UseCompressedOops
+ *                   -XX:+UnlockDiagnosticVMOptions -XX:+AbortVMOnCompilationFailure -XX:+WhiteBoxAPI -Xbootclasspath/a:.
+ *                   -XX:FastAllocateSizeLimit=0
+ *                   -Xint
+ *                   -javaagent:basicAgent.jar GetObjectSizeIntrinsicsTest GetObjectSizeIntrinsicsTest
+ *
+ * @run main/othervm -Xmx128m -XX:-UseCompressedOops
+ *                   -XX:+UnlockDiagnosticVMOptions -XX:+AbortVMOnCompilationFailure -XX:+WhiteBoxAPI -Xbootclasspath/a:.
+ *                   -XX:FastAllocateSizeLimit=0
+ *                   -Xbatch -XX:TieredStopAtLevel=1
+ *                   -javaagent:basicAgent.jar GetObjectSizeIntrinsicsTest GetObjectSizeIntrinsicsTest
+ *
+ * @run main/othervm -Xmx128m -XX:-UseCompressedOops
+ *                   -XX:+UnlockDiagnosticVMOptions -XX:+AbortVMOnCompilationFailure -XX:+WhiteBoxAPI -Xbootclasspath/a:.
+ *                   -XX:FastAllocateSizeLimit=0
+ *                   -Xbatch -XX:-TieredCompilation
+ *                   -javaagent:basicAgent.jar GetObjectSizeIntrinsicsTest GetObjectSizeIntrinsicsTest
+ */
+
+/*
+ * @test
+ * @summary Test for fInst.getObjectSize with 32-bit compressed oops
+ * @library /test/lib
+ * @requires vm.bits == 64
+ * @requires vm.debug
+ *
+ * @build jdk.test.whitebox.WhiteBox
+ * @run build GetObjectSizeIntrinsicsTest
+ * @run shell MakeJAR.sh basicAgent
+ *
+ * @run driver jdk.test.lib.helpers.ClassFileInstaller jdk.test.whitebox.WhiteBox
+ *
+ * @run main/othervm -Xmx128m
+ *                   -XX:+UnlockDiagnosticVMOptions -XX:+AbortVMOnCompilationFailure -XX:+WhiteBoxAPI -Xbootclasspath/a:.
+ *                   -XX:ObjectAlignmentInBytes=32
+ *                   -Xint
+ *                   -javaagent:basicAgent.jar GetObjectSizeIntrinsicsTest GetObjectSizeIntrinsicsTest
+ *
+ * @run main/othervm -Xmx128m
+ *                   -XX:+UnlockDiagnosticVMOptions -XX:+AbortVMOnCompilationFailure -XX:+WhiteBoxAPI -Xbootclasspath/a:.
+ *                   -XX:ObjectAlignmentInBytes=32
+ *                   -Xbatch -XX:TieredStopAtLevel=1
+ *                   -javaagent:basicAgent.jar GetObjectSizeIntrinsicsTest GetObjectSizeIntrinsicsTest
+ *
+ * @run main/othervm -Xmx128m
+ *                   -XX:+UnlockDiagnosticVMOptions -XX:+AbortVMOnCompilationFailure -XX:+WhiteBoxAPI -Xbootclasspath/a:.
+ *                   -XX:ObjectAlignmentInBytes=32
+ *                   -Xbatch -XX:-TieredCompilation
+ *                   -javaagent:basicAgent.jar GetObjectSizeIntrinsicsTest GetObjectSizeIntrinsicsTest
+ */
+
+/*
+ * @test
+ * @summary Test for fInst.getObjectSize with zero-based compressed oops
+ * @library /test/lib
+ * @requires vm.bits == 64
+ * @requires vm.debug
+ *
+ * @build jdk.test.whitebox.WhiteBox
+ * @run build GetObjectSizeIntrinsicsTest
+ * @run shell MakeJAR.sh basicAgent
+ *
+ * @run driver jdk.test.lib.helpers.ClassFileInstaller jdk.test.whitebox.WhiteBox
+ *
+ * @run main/othervm -Xmx4g
+ *                   -XX:+UnlockDiagnosticVMOptions -XX:+AbortVMOnCompilationFailure -XX:+WhiteBoxAPI -Xbootclasspath/a:.
+ *                   -XX:ObjectAlignmentInBytes=32
+ *                   -Xint
+ *                   -javaagent:basicAgent.jar GetObjectSizeIntrinsicsTest GetObjectSizeIntrinsicsTest
+ *
+ * @run main/othervm -Xmx4g
+ *                   -XX:+UnlockDiagnosticVMOptions -XX:+AbortVMOnCompilationFailure -XX:+WhiteBoxAPI -Xbootclasspath/a:.
+ *                   -XX:ObjectAlignmentInBytes=32
+ *                   -Xbatch -XX:TieredStopAtLevel=1
+ *                   -javaagent:basicAgent.jar GetObjectSizeIntrinsicsTest GetObjectSizeIntrinsicsTest
+ *
+ * @run main/othervm -Xmx4g
+ *                   -XX:+UnlockDiagnosticVMOptions -XX:+AbortVMOnCompilationFailure -XX:+WhiteBoxAPI -Xbootclasspath/a:.
+ *                   -XX:ObjectAlignmentInBytes=32
+ *                   -Xbatch -XX:-TieredCompilation
+ *                   -javaagent:basicAgent.jar GetObjectSizeIntrinsicsTest GetObjectSizeIntrinsicsTest
+ */
+
+/*
+ * @test
+ * @summary Test for fInst.getObjectSize with large arrays
+ * @library /test/lib
+ * @requires vm.bits == 64
+ * @requires vm.debug
+ * @requires os.maxMemory >= 10G
+ *
+ * @build jdk.test.whitebox.WhiteBox
+ * @run build GetObjectSizeIntrinsicsTest
+ * @run shell MakeJAR.sh basicAgent
+ *
+ * @run driver jdk.test.lib.helpers.ClassFileInstaller jdk.test.whitebox.WhiteBox
+ *
+ * @run main/othervm/timeout=300 -Xmx8g
+ *                   -XX:+UnlockDiagnosticVMOptions -XX:+AbortVMOnCompilationFailure -XX:+WhiteBoxAPI -Xbootclasspath/a:.
+ *                   -Xint
+ *                   -javaagent:basicAgent.jar GetObjectSizeIntrinsicsTest GetObjectSizeIntrinsicsTest large
+ *
+ * @run main/othervm/timeout=240 -Xmx8g
+ *                   -XX:+UnlockDiagnosticVMOptions -XX:+AbortVMOnCompilationFailure -XX:+WhiteBoxAPI -Xbootclasspath/a:.
+ *                   -Xbatch -XX:TieredStopAtLevel=1
+ *                   -javaagent:basicAgent.jar GetObjectSizeIntrinsicsTest GetObjectSizeIntrinsicsTest large
+ *
+ * @run main/othervm/timeout=180 -Xmx8g
+ *                   -XX:+UnlockDiagnosticVMOptions -XX:+AbortVMOnCompilationFailure -XX:+WhiteBoxAPI -Xbootclasspath/a:.
+ *                   -Xbatch -XX:-TieredCompilation
+ *                   -javaagent:basicAgent.jar GetObjectSizeIntrinsicsTest GetObjectSizeIntrinsicsTest large
+ */
+
+import java.util.*;
+
+import jdk.test.lib.Platform;
+import jdk.test.whitebox.WhiteBox;
+
+public class GetObjectSizeIntrinsicsTest extends ASimpleInstrumentationTestCase {
+
+    private static final boolean COMPACT_HEADERS = Platform.is64bit() && WhiteBox.getWhiteBox().getBooleanVMFlag("UseCompactObjectHeaders");
+    static final Boolean COMPRESSED_OOPS = WhiteBox.getWhiteBox().getBooleanVMFlag("UseCompressedOops");
+    static final long REF_SIZE = (COMPRESSED_OOPS == null || COMPRESSED_OOPS == true) ? 4 : 8;
+
+    static final Long align = WhiteBox.getWhiteBox().getIntVMFlag("ObjectAlignmentInBytes");
+    static final int OBJ_ALIGN = (align == null ? 8 : align.intValue());
+
+    static final int SMALL_ARRAY_SIZE = 1024;
+
+    // These should overflow 4G size boundary
+    static final int LARGE_INT_ARRAY_SIZE = 1024*1024*1024 + 1024;
+    static final int LARGE_OBJ_ARRAY_SIZE = (4096/(int)REF_SIZE)*1024*1024 + 1024;
+
+    static final boolean CCP = WhiteBox.getWhiteBox().getBooleanVMFlag("UseCompressedClassPointers");
+    static final int ARRAY_HEADER_SIZE = CCP ? 16 : (Platform.is64bit() ? 20 : 12);
+
+    final String mode;
+
+    public GetObjectSizeIntrinsicsTest(String name, String mode) {
+        super(name);
+        this.mode = mode;
+    }
+
+    public static void main(String[] args)throws Throwable {
+        new GetObjectSizeIntrinsicsTest(args[0], (args.length >= 2 ? args[1] : "")).runTest();
+    }
+
+    public static final int ITERS = 200_000;
+
+    public static void assertEquals(long expected, long actual) {
+        if (expected != actual) {
+            throw new IllegalStateException(
+               "Error: expected: " + expected + " (" + Long.toHexString(expected) +
+                "), actual: " + actual + " (" + Long.toHexString(actual) + ")");
+        }
+    }
+
+    public static void assertNotEquals(long notExpected, long actual) {
+        if (notExpected == actual) {
+            throw new IllegalStateException(
+               "Error: not expected: " + notExpected + " (" + Long.toHexString(notExpected) +
+                "), actual: " + actual + " (" + Long.toHexString(actual) + ")");
+        }
+    }
+
+    public static void assertFail() {
+        throw new IllegalStateException("Should not be here");
+    }
+
+    protected final void doRunTest() throws Throwable {
+        testSize_newObject();
+        testSize_localObject();
+        testSize_fieldObject();
+
+        testSize_newSmallIntArray();
+        testSize_localSmallIntArray();
+        testSize_fieldSmallIntArray();
+
+        testSize_newSmallObjArray();
+        testSize_localSmallObjArray();
+        testSize_fieldSmallObjArray();
+
+        if (mode.equals("large")) {
+            testSize_localLargeIntArray();
+            testSize_localLargeObjArray();
+        }
+
+        testNulls();
+    }
+
+    private static long roundUp(long v, long a) {
+        return (v + a - 1) / a * a;
+    }
+
+    private static long expectedSmallObjSize() {
+        long size;
+        if (!Platform.is64bit() || COMPACT_HEADERS) {
+            size = 8;
+        } else {
+            size = 16;
+        }
+        return roundUp(size, OBJ_ALIGN);
+    }
+
+    private void testSize_newObject() {
+        long expected = expectedSmallObjSize();
+        for (int c = 0; c < ITERS; c++) {
+            assertEquals(expected, fInst.getObjectSize(new Object()));
+        }
+    }
+
+    private void testSize_localObject() {
+        long expected = expectedSmallObjSize();
+        Object o = new Object();
+        for (int c = 0; c < ITERS; c++) {
+            assertEquals(expected, fInst.getObjectSize(o));
+        }
+    }
+
+    static Object staticO = new Object();
+
+    private void testSize_fieldObject() {
+        long expected = expectedSmallObjSize();
+        for (int c = 0; c < ITERS; c++) {
+            assertEquals(expected, fInst.getObjectSize(staticO));
+        }
+    }
+
+    private void testSize_newSmallIntArray() {
+        long expected = roundUp(4L*SMALL_ARRAY_SIZE + ARRAY_HEADER_SIZE, OBJ_ALIGN);
+        for (int c = 0; c < ITERS; c++) {
+            assertEquals(expected, fInst.getObjectSize(new int[SMALL_ARRAY_SIZE]));
+        }
+    }
+
+    private void testSize_localSmallIntArray() {
+        int[] arr = new int[SMALL_ARRAY_SIZE];
+        long expected = roundUp(4L*SMALL_ARRAY_SIZE + ARRAY_HEADER_SIZE, OBJ_ALIGN);
+        for (int c = 0; c < ITERS; c++) {
+            assertEquals(expected, fInst.getObjectSize(arr));
+        }
+    }
+
+    static int[] smallArr = new int[SMALL_ARRAY_SIZE];
+
+    private void testSize_fieldSmallIntArray() {
+        long expected = roundUp(4L*SMALL_ARRAY_SIZE + ARRAY_HEADER_SIZE, OBJ_ALIGN);
+        for (int c = 0; c < ITERS; c++) {
+            assertEquals(expected, fInst.getObjectSize(smallArr));
+        }
+    }
+
+    private void testSize_newSmallObjArray() {
+        long expected = roundUp(REF_SIZE*SMALL_ARRAY_SIZE + ARRAY_HEADER_SIZE, OBJ_ALIGN);
+        for (int c = 0; c < ITERS; c++) {
+            assertEquals(expected, fInst.getObjectSize(new Object[SMALL_ARRAY_SIZE]));
+        }
+    }
+
+    private void testSize_localSmallObjArray() {
+        Object[] arr = new Object[SMALL_ARRAY_SIZE];
+        long expected = roundUp(REF_SIZE*SMALL_ARRAY_SIZE + ARRAY_HEADER_SIZE, OBJ_ALIGN);
+        for (int c = 0; c < ITERS; c++) {
+            assertEquals(expected, fInst.getObjectSize(arr));
+        }
+    }
+
+    static Object[] smallObjArr = new Object[SMALL_ARRAY_SIZE];
+
+    private void testSize_fieldSmallObjArray() {
+        long expected = roundUp(REF_SIZE*SMALL_ARRAY_SIZE + ARRAY_HEADER_SIZE, OBJ_ALIGN);
+        for (int c = 0; c < ITERS; c++) {
+            assertEquals(expected, fInst.getObjectSize(smallObjArr));
+        }
+    }
+
+    private void testSize_localLargeIntArray() {
+        int[] arr = new int[LARGE_INT_ARRAY_SIZE];
+        long expected = roundUp(4L*LARGE_INT_ARRAY_SIZE + ARRAY_HEADER_SIZE, OBJ_ALIGN);
+        for (int c = 0; c < ITERS; c++) {
+            assertEquals(expected, fInst.getObjectSize(arr));
+        }
+    }
+
+    private void testSize_localLargeObjArray() {
+        Object[] arr = new Object[LARGE_OBJ_ARRAY_SIZE];
+        long expected = roundUp(REF_SIZE*LARGE_OBJ_ARRAY_SIZE + ARRAY_HEADER_SIZE, OBJ_ALIGN);
+        for (int c = 0; c < ITERS; c++) {
+            assertEquals(expected, fInst.getObjectSize(arr));
+        }
+    }
+
+    private void testNulls() {
+        for (int c = 0; c < ITERS; c++) {
+            try {
+                fInst.getObjectSize(null);
+                assertFail();
+            } catch (NullPointerException e) {
+                // expected
+            }
+        }
+    }
+
+}