Quelle TestStackWalk.java Sprache: JAVA

/*
*  Copyright (c) 2020, 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
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*  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).
*
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*  Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
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/*
* @test id=default_gc
* @enablePreview
* @requires ((os.arch == "amd64" | os.arch == "x86_64") & sun.arch.data.model == "64") | os.arch == "aarch64"
* @library /test/lib
* @library ../
* @build jdk.test.whitebox.WhiteBox
* @run driver jdk.test.lib.helpers.ClassFileInstaller jdk.test.whitebox.WhiteBox
*
* @run main/othervm
*   -Xbootclasspath/a:.
*   -XX:+UnlockDiagnosticVMOptions
*   -XX:+WhiteBoxAPI
*   --enable-native-access=ALL-UNNAMED
*   -Xbatch
*   TestStackWalk
*/

/*
* @test id=zgc
* @enablePreview
* @requires (((os.arch == "amd64" | os.arch == "x86_64") & sun.arch.data.model == "64") | os.arch == "aarch64")
* @requires vm.gc.Z
* @library /test/lib
* @library ../
* @build jdk.test.whitebox.WhiteBox
* @run driver jdk.test.lib.helpers.ClassFileInstaller jdk.test.whitebox.WhiteBox
*
* @run main/othervm
*   -Xbootclasspath/a:.
*   -XX:+UnlockDiagnosticVMOptions
*   -XX:+WhiteBoxAPI
*   --enable-native-access=ALL-UNNAMED
*   -Xbatch
*   -XX:+UseZGC
*   TestStackWalk
*/
/*
* @test id=shenandoah
* @enablePreview
* @requires (((os.arch == "amd64" | os.arch == "x86_64") & sun.arch.data.model == "64") | os.arch == "aarch64")
* @requires vm.gc.Shenandoah
* @library /test/lib
* @library ../
* @build jdk.test.whitebox.WhiteBox
* @run driver jdk.test.lib.helpers.ClassFileInstaller jdk.test.whitebox.WhiteBox
*
* @run main/othervm
*   -Xbootclasspath/a:.
*   -XX:+UnlockDiagnosticVMOptions
*   -XX:+WhiteBoxAPI
*   --enable-native-access=ALL-UNNAMED
*   -Xbatch
*   -XX:+UseShenandoahGC
*   TestStackWalk
*/

import java.lang.foreign.Arena;
import java.lang.foreign.Linker;
import java.lang.foreign.FunctionDescriptor;
import java.lang.foreign.MemorySegment;

import java.lang.invoke.MethodHandle;
import java.lang.invoke.MethodType;
import java.lang.ref.Reference;

import jdk.test.whitebox.WhiteBox;

import static java.lang.invoke.MethodHandles.lookup;

public class TestStackWalk extends NativeTestHelper {
    static final WhiteBox WB = WhiteBox.getWhiteBox();

    static final Linker linker = Linker.nativeLinker();

    static final MethodHandle MH_foo;
    static final MethodHandle MH_m;

    static {
        try {
            System.loadLibrary("StackWalk");
            MH_foo = linker.downcallHandle(
                    findNativeOrThrow("foo"),
                    FunctionDescriptor.ofVoid(C_POINTER));
            MH_m = lookup().findStatic(TestStackWalk.class, "m", MethodType.methodType(void.class));
        } catch (ReflectiveOperationException e) {
            throw new RuntimeException(e);
        }
    }

    static boolean armed;

    public static void main(String[] args) throws Throwable {
        try (Arena arena = Arena.openConfined()) {
            MemorySegment stub = linker.upcallStub(MH_m, FunctionDescriptor.ofVoid(), arena.scope());
            armed = false;
            for (int i = 0; i < 20_000; i++) {
                payload(stub); // warmup
            }

            armed = true;
            payload(stub); // test
        }
    }

    static void payload(MemorySegment cb) throws Throwable {
        MH_foo.invoke(cb);
        Reference.reachabilityFence(cb); // keep oop alive across call
    }

    static void m() {
        if (armed) {
            WB.verifyFrames(/*log=*/true, /*updateRegisterMap=*/true);
            WB.verifyFrames(/*log=*/true, /*updateRegisterMap=*/false); // triggers different code paths
        }
    }

}

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