JDK-8339307 : jhsdb jstack could not trace FFM upcall frame
  • Type: Bug
  • Component: hotspot
  • Sub-Component: svc-agent
  • Affected Version: 22,23,24
  • Priority: P4
  • Status: Resolved
  • Resolution: Fixed
  • Submitted: 2024-08-30
  • Updated: 2024-09-16
  • Resolved: 2024-09-07
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JDK 24
24 b15Fixed
Related Reports
Relates :  
JDK-8339703 - Problem list serviceability/sa/TestJhsdbJstackUpcall.java for generational ZGC
Relates :  
JDK-8339772 - serviceability/sa/TestJhsdbJstackUpcall.java fails on Linux ppc64le
Description
I attempted to check stack trace in the core generated by [1] with `jhsdb jstack`, however it failed with following exception.

```
Error occurred during stack walking:
java.lang.RuntimeException: Couldn't deduce type of CodeBlob @0x00007fa04c265990 for PC=0x00007fa04c265aa6
        at jdk.hotspot.agent/sun.jvm.hotspot.code.CodeCache.findBlobUnsafe(CodeCache.java:124)
        at jdk.hotspot.agent/sun.jvm.hotspot.code.CodeCache.findBlob(CodeCache.java:83)
        at jdk.hotspot.agent/sun.jvm.hotspot.runtime.Frame.cb(Frame.java:119)
        at jdk.hotspot.agent/sun.jvm.hotspot.runtime.x86.X86Frame.adjustUnextendedSP(X86Frame.java:334)
        at jdk.hotspot.agent/sun.jvm.hotspot.runtime.x86.X86Frame.initFrame(X86Frame.java:137)
        at jdk.hotspot.agent/sun.jvm.hotspot.runtime.x86.X86Frame.<init>(X86Frame.java:163)
        at jdk.hotspot.agent/sun.jvm.hotspot.runtime.x86.X86Frame.senderForInterpreterFrame(X86Frame.java:361)
        at jdk.hotspot.agent/sun.jvm.hotspot.runtime.x86.X86Frame.sender(X86Frame.java:281)
        at jdk.hotspot.agent/sun.jvm.hotspot.runtime.Frame.sender(Frame.java:207)
        at jdk.hotspot.agent/sun.jvm.hotspot.runtime.Frame.realSender(Frame.java:212)
        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:144)
        at jdk.hotspot.agent/sun.jvm.hotspot.tools.StackTrace.run(StackTrace.java:81)
        at jdk.hotspot.agent/sun.jvm.hotspot.tools.StackTrace.run(StackTrace.java:45)
        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.jvm.hotspot.tools.Tool.execute(Tool.java:134)
        at jdk.hotspot.agent/sun.jvm.hotspot.tools.JStack.runWithArgs(JStack.java:90)
        at jdk.hotspot.agent/sun.jvm.hotspot.SALauncher.runJSTACK(SALauncher.java:302)
        at jdk.hotspot.agent/sun.jvm.hotspot.SALauncher.main(SALauncher.java:500)
Caused by: sun.jvm.hotspot.types.WrongTypeException: No suitable match for type of address 0x00007fa04c265990 (nearest symbol is _ZTV10UpcallStub)
        at jdk.hotspot.agent/sun.jvm.hotspot.runtime.InstanceConstructor.newWrongTypeException(InstanceConstructor.java:62)
        at jdk.hotspot.agent/sun.jvm.hotspot.runtime.VirtualConstructor.instantiateWrapperFor(VirtualConstructor.java:80)
        at jdk.hotspot.agent/sun.jvm.hotspot.code.CodeCache.findBlobUnsafe(CodeCache.java:107)
```

FFM upcall would use `UpcallStub` to call Java code from native, however frame size of the stub would be set to zero implicitly. It should be set to valid size.

[1] https://github.com/YaSuenag/garakuta/blob/841452d9176dab1ddbb552009c180530eb81190b/NativeSEGV/ffm/upcall/src/main/java/com/yasuenag/garakuta/nativesegv/upcall/Main.java
Comments
Unfortunately serviceability/sa/TestJhsdbJstackUpcall.java fails on Linux ppc64le, I created JDK-8339772 .
09-09-2024
Changeset: deeb09a6 Branch: master Author: Yasumasa Suenaga <ysuenaga@openjdk.org> Date: 2024-09-07 05:46:47 +0000 URL: https://git.openjdk.org/jdk/commit/deeb09a640bf693ea130d1283fc010c22f0cf9db
07-09-2024
A pull request was submitted for review. Branch: master URL: https://git.openjdk.org/jdk/pull/20885 Date: 2024-09-06 09:31:45 +0000
06-09-2024
A pull request was submitted for review. Branch: master URL: https://git.openjdk.org/jdk/pull/20789 Date: 2024-08-30 09:14:11 +0000
30-08-2024