On Tue, 3 Nov 2026 23:58:26 GMT, Yasumasa Suenaga <[email protected]> wrote:
>> test/hotspot/jtreg/serviceability/sa/TestJhsdbJstackWithVirtualThread.java
>> checks whether `jhsdb jstack` for VirtualThread works, and it seems to pass
>> so far. However .jtr file includes following lines. It would not trigger the
>> test failure.
>>
>>
>> "ForkJoinPool-1-worker-1" #24 daemon prio=5 tid=0x00007f9b0c4fb3e0 nid=91489
>> runnable [0x00007f9af18ff000]
>> java.lang.Thread.State: RUNNABLE
>> JavaThread state: _thread_in_native
>> -
>> java.lang.invoke.LambdaForm$MH+0x0000000070047800.invoke(java.lang.Object,
>> long, int) @bci=10 (Interpreted frame)
>> -
>> java.lang.invoke.LambdaForm$MH+0x000000007004d400.invokeExact_MT(java.lang.Object,
>> long, int, java.lang.Object) @bci=21 (Interpreted frame)
>> -
>> jdk.internal.foreign.abi.DowncallStub+0x0000000070048800.invoke(java.lang.foreign.SegmentAllocator,
>> java.lang.foreign.MemorySegment, int) @bci=44 (Interpreted frame)
>> -
>> java.lang.invoke.LambdaForm$DMH+0x0000000070048c00.invokeStaticInit(java.lang.Object,
>> java.lang.Object, java.lang.Object, int) @bci=14 (Interpreted frame)
>> -
>> java.lang.invoke.LambdaForm$MH+0x000000007004c800.invoke(java.lang.Object,
>> int) @bci=44 (Interpreted frame)
>> -
>> java.lang.invoke.LambdaForm$MH+0x000000007004c400.invoke_MT(java.lang.Object,
>> int, java.lang.Object) @bci=18 (Interpreted frame)
>> - LingeredAppWithVirtualThread.run() @bci=15, line=69 (Interpreted frame)
>>
>> Error occurred during stack walking:
>> sun.jvm.hotspot.debugger.UnalignedAddressException: Trying to read at
>> address: 0x000000000000000d with alignment: 8
>> at
>> jdk.hotspot.agent/sun.jvm.hotspot.debugger.DebuggerUtilities.checkAlignment(DebuggerUtilities.java:68)
>> at
>> jdk.hotspot.agent/sun.jvm.hotspot.debugger.DebuggerBase.readCInteger(DebuggerBase.java:352)
>> at
>> jdk.hotspot.agent/sun.jvm.hotspot.debugger.DebuggerBase.readAddressValue(DebuggerBase.java:385)
>> at
>> jdk.hotspot.agent/sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal.readAddress(LinuxDebuggerLocal.java:493)
>> at
>> jdk.hotspot.agent/sun.jvm.hotspot.debugger.linux.LinuxAddress.getAddressAt(LinuxAddress.java:73)
>> at
>> jdk.hotspot.agent/sun.jvm.hotspot.runtime.amd64.AMD64Frame.getLink(AMD64Frame.java:453)
>> at
>> jdk.hotspot.agent/sun.jvm.hotspot.runtime.amd64.AMD64Frame.sender(AMD64Frame.java:304)
>> at jdk.hotspot.agent/sun.jvm.hotspot.runtime.Frame.sender(Frame.java:218)
>> at jdk.hotspot.agent/sun.jvm.hotspot.runtime.Frame.realSender(Frame.java:223)
>> at jdk.hotspot.agent/sun.jvm.hotspot.runtime.VFrame.sender(VFrame.java:120)
>> at jdk.hotspot.agent/sun.jvm.hotspot.run...
>
> Yasumasa Suenaga has updated the pull request incrementally with one
> additional commit since the last revision:
>
> Add PPC64 change
>
> Contributed-by: @TheRealMDoerr
I modified TestJhsdbJstackWithVirtualThread.java to check whether error message
("Error occurred during stack walking") was written in stdout. It is not a risk
and should be checked.
@plummercj Could you review?
-------------
PR Comment: https://git.openjdk.org/jdk/pull/33656#issuecomment-6619948067
