On Sat, 31 Oct 2026 02:14:18 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.runtime.VFrame.javaSender(VFrame.java:150) > at jdk.hotspot... This pull request has now been integrated. Changeset: 575f8793 Author: Yasumasa Suenaga <[email protected]> URL: https://git.openjdk.org/jdk/commit/575f8793a51d159a97dce1e2fd2455713dbd10e1 Stats: 79 lines in 5 files changed: 73 ins; 0 del; 6 mod 8396232: TestJhsdbJstackWithVirtualThread.java reports UnalignedAddressException silently Co-authored-by: Fei Yang <[email protected]> Co-authored-by: Martin Doerr <[email protected]> Reviewed-by: cjplummer, sspitsyn ------------- PR: https://git.openjdk.org/jdk/pull/33656
