On Sat, 24 Jan 2026 15:13:48 GMT, Yasumasa Suenaga <[email protected]> wrote:
> [JDK-8374482](https://bugs.openjdk.org/browse/JDK-8374482) has introduced to > treat signal trampoline. It realized to unwind problematic frame from signal > trampoline. > However it would fail if problematic frame is optimized by compiler - it > means FDE (Frame Description Entry) of the function is NOP only. > > > 00000018 0000000000000010 0000001c FDE cie=00000000 > pc=0000000000000200..0000000000000206 > DW_CFA_nop > DW_CFA_nop > DW_CFA_nop > > > Actually we can see following stacks and exception as following in > TestJhsdbJstackMixedCore.java: > > > 0x00007f14d500204d os::abort(bool, void const*, void const*) [clone .co > ld] + 0x4 > 0x00007f14d6bd0001 VMError::report_and_die(int, char const*, char const > *, __va_list_tag*, Thread*, unsigned char*, void const*, void const*, char c > onst*, int, unsigned long) + 0x6f1 > 0x00007f14d6bd07b9 VMError::report_and_die(Thread*, unsigned int, unsig > ned char*, void const*, void const*, char const*, ...) + 0x88 > 0x00007f14d6bd0818 VMError::report_and_die(Thread*, unsigned int, unsig > ned char*, void const*, void const*) + 0x58 > 0x00007f14d68ff1ba JVM_handle_linux_signal + 0x42a > 0x00007f14d7964290 <signal handler called> > 0x00007f14d780b3a0 Java_jdk_test_lib_apps_LingeredApp_crash > 0x00007f14be7468ba > ----------System.err:(20/1429)---------- > java.lang.NullPointerException: Cannot invoke > "sun.jvm.hotspot.debugger.Address.addOffsetTo(long)" because the return value > of "sun.jvm.hotspot.runtime.Frame.getFP()" is null > at > jdk.hotspot.agent/sun.jvm.hotspot.runtime.Frame.addressOfStackSlot(Frame.java:255) > at > jdk.hotspot.agent/sun.jvm.hotspot.runtime.amd64.AMD64Frame.addressOfInterpreterFrameMethod(AMD64Frame.java:532) > at > jdk.hotspot.agent/sun.jvm.hotspot.runtime.Frame.getInterpreterFrameMethod(Frame.java:389) > at > jdk.hotspot.agent/sun.jvm.hotspot.runtime.InterpretedVFrame.getMethod(InterpretedVFrame.java:36) > at > jdk.hotspot.agent/sun.jvm.hotspot.tools.PStack.getJavaNames(PStack.java:251) > at jdk.hotspot.agent/sun.jvm.hotspot.tools.PStack.run(PStack.java:135) > at jdk.hotspot.agent/sun.jvm.hotspot.tools.PStack.run(PStack.java:65) > at jdk.hotspot.agent/sun.jvm.hotspot.tools.PStack.run(PStack.java:60) > at jdk.hotspot.agent/sun.jvm.hotspot.tools.JStack.run(JStack.java:67) > at > jdk.hotspot.agent/sun.jvm.hotspot.tools.Tool.startInternal(Tool.java:278) > at jdk.hotspot.agent/sun.jvm.hotspot.tools.Tool.start(Tool.java:241) > at jdk.hotspot.agent/sun.j... This pull request has now been integrated. Changeset: d1b226de Author: Yasumasa Suenaga <[email protected]> URL: https://git.openjdk.org/jdk/commit/d1b226dec293804cd6f929c4a46ae59cb246253e Stats: 206 lines in 7 files changed: 57 ins; 84 del; 65 mod 8376264: Mixed jstack could not unwind optimized frame Reviewed-by: cjplummer, kevinw ------------- PR: https://git.openjdk.org/jdk/pull/29398
