/*
* 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
* 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 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
}
}
}
Messung V0.5 in Prozent C=94 H=87 G=90
¤ Dauer der Verarbeitung: 0.23 Sekunden
(vorverarbeitet am 2026-06-09)
¤
*© Formatika GbR, Deutschland