On Sat, 1 Nov 2025 03:20:49 GMT, Yasumasa Suenaga <[email protected]> wrote:
>> `jhsdb jstack --mixed` would not work when attaches to the process runs with >> `-Xcomp`. >> >> It has been reported by @pchilano in #27728. You can reproduce the problem >> with [Test.java (attached >> JBS)](https://bugs.openjdk.org/secure/attachment/116551/Test.java). You can >> see following stack. >> >> >> ----------------- 646689 ----------------- >> "Thread-0" #24 prio=5 tid=0x00007f1cec18c890 nid=646689 waiting on condition >> [0x00007f1cd0158000] >> java.lang.Thread.State: TIMED_WAITING (sleeping) >> JavaThread state: _thread_blocked >> 0x00007f1cf3b7f462 __syscall_cancel_arch + 0x32 >> 0x00007f1cf3b7375c __internal_syscall_cancel + 0x5c >> 0x00007f1cf3b766a8 ___pthread_cond_timedwait + 0x178 >> 0x00007f1cf270e1e9 PlatformEvent::park_nanos(long) + 0x119 >> 0x00007f1cf2005f4c JavaThread::sleep_nanos(long) + 0xfc >> 0x00007f1cf218789f JVM_SleepNanos + 0x28f >> 0x00007f1cdb95f299 java.lang.Thread.sleepNanos0(long) + 0x99 (Native method) >> >> >> `Thread.sleepNanos0` is the bottom stack, but actually it has more call >> frames. You can see them with `-XX:+PreserveFramePointer`. >> >> >> ----------------- 646841 ----------------- >> "Thread-0" #24 prio=5 tid=0x00007f4a0018c9e0 nid=646841 waiting on condition >> [0x00007f49e4fd7000] >> java.lang.Thread.State: TIMED_WAITING (sleeping) >> JavaThread state: _thread_blocked >> 0x00007f4a0aa29462 __syscall_cancel_arch + 0x32 >> 0x00007f4a0aa1d75c __internal_syscall_cancel + 0x5c >> 0x00007f4a0aa206a8 ___pthread_cond_timedwait + 0x178 >> 0x00007f4a0970e1e9 PlatformEvent::park_nanos(long) + 0x119 >> 0x00007f4a09005f4c JavaThread::sleep_nanos(long) + 0xfc >> 0x00007f4a0918789f JVM_SleepNanos + 0x28f >> 0x00007f49ef961099 java.lang.Thread.sleepNanos0(long) + 0x99 (Native method) >> 0x00007f49e7f477b4 * java.lang.Thread.sleepNanos(long) bci:33 line:509 >> (Compiled frame) >> 0x00007f49e7f41a64 * java.lang.Thread.sleep(long) bci:25 line:540 (Compiled >> frame) >> 0x00007f49e7f4037c * Test.run() bci:3 line:6 (Compiled frame) >> 0x00007f49ef943328 * java.lang.Thread.runWith(java.lang.Object, >> java.lang.Runnable) bci:5 line:1487 (Compiled frame) >> * java.lang.Thread.run() bci:19 line:1474 (Compiled >> frame) >> 0x00007f49ef3385fd <StubRoutines (initial stubs)> >> 0x00007f4a08fc247e JavaCalls::call_helper(JavaValue*, methodHandle const&, >> JavaCallArguments*, JavaThread*) + 0x4ce >> 0x00007f4a08fc2bb3 JavaCalls::call_virtual(JavaValue*, Klass*, Symbol*, >> Symbol*, JavaCallArguments*, JavaThread*) + 0x2d3 >> 0x00007f4a08fc31bb JavaCalls::call_virtu... > > Yasumasa Suenaga has updated the pull request with a new target base due to a > merge or a rebase. The pull request now contains 16 commits: > > - Merge branch 'master' into jhsdb-jstack-bp > - Improve comments in isValidFrame method > - Use stderrShouldBeEmptyIgnoreVMWarnings > - TestJhsdbJstackMixedWithXComp.java should be run on Linux AMD64 only > - Respect RSP to parse DWARF > - Revert testcase changes > - Fix imports > - Update testcase > - Update testcase > - Add glibc version check to TestJhsdbJstackMixedWithXComp.java > - ... and 6 more: https://git.openjdk.org/jdk/compare/d2260236...eb2f0ab0 Thanks, spent quite a while going over this yesterday and think it's good. Yes was waiting for the conflict with 8369994, that looks like it merged in OK. 8-) ------------- Marked as reviewed by kevinw (Reviewer). PR Review: https://git.openjdk.org/jdk/pull/27885#pullrequestreview-3407206806
