112 lines
4.0 KiB
Java
112 lines
4.0 KiB
Java
/*
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* Copyright (c) 2023, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/*
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* @test
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* @library ../ /test/lib
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* @requires vm.debug
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* @run main/othervm
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* -Xms1g -Xmx1g
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* -XX:+CheckUnhandledOops
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* -Xlog:gc -Xlog:gc+jni=debug
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* --enable-native-access=ALL-UNNAMED
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* TestStressAllowHeap
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*/
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import java.lang.foreign.*;
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import java.lang.invoke.*;
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import java.nio.file.Files;
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import java.nio.file.Path;
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import java.util.List;
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import static jdk.test.lib.Asserts.*;
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/**
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* Test verifies the GCLocker::lock_critical slow path with FFM.
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* This is the case where we enter a critical section with _needs_gc == true,
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* and need to take a safepoint.
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*
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* Based on gc/TestJNICriticalStressTest
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*/
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public class TestStressAllowHeap {
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private static final long DURATION_SECONDS = 30;
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public static void main(String... args) throws Exception {
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System.out.println("Running for " + DURATION_SECONDS + " secs");
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int numCriticalThreads = Runtime.getRuntime().availableProcessors();
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System.out.println("Starting " + numCriticalThreads + " critical threads");
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for (int i = 0; i < numCriticalThreads; i += 1) {
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Thread.ofPlatform().start(new CriticalWorker());
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}
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long durationMS = 1000L * DURATION_SECONDS;
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try {
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Thread.sleep(durationMS);
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} catch (InterruptedException e) {
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e.printStackTrace();
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System.exit(-1);
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}
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// hitting the problematic code path doesn't seem to be guaranteed
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// and we can not guarantee it by, e.g. stalling in a critical method
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// since that can lock up the VM (and our test code)
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}
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private static class CriticalWorker extends NativeTestHelper implements Runnable {
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static {
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System.loadLibrary("Critical");
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}
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private void doStep(MethodHandle handle, SequenceLayout sequence) throws Throwable {
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try (Arena arena = Arena.ofConfined()) {
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MemorySegment heapSegment = MemorySegment.ofArray(new int[(int) sequence.elementCount()]);
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TestValue sourceSegment = genTestValue(sequence, arena);
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handle.invokeExact(heapSegment, (MemorySegment) sourceSegment.value(), (int) sequence.byteSize());
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// check that writes went through to array
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sourceSegment.check(heapSegment);
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}
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}
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@Override
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public void run() {
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FunctionDescriptor fDesc = FunctionDescriptor.ofVoid(C_POINTER, C_POINTER, C_INT);
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MethodHandle handle = Linker.nativeLinker().downcallHandle(
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SymbolLookup.loaderLookup().find("test_allow_heap_void").get(),
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fDesc,
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Linker.Option.critical(true));
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int elementCount = 10;
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SequenceLayout sequence = MemoryLayout.sequenceLayout(elementCount, C_INT);
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while (true) {
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try {
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doStep(handle, sequence);
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} catch (Throwable t) {
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throw new RuntimeException(t);
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}
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}
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}
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}
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}
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