[jboss-jira] [JBoss JIRA] (JASSIST-273) `Inconsistent stackmap frames` issue while instrumenting Kotlin anonymous class

[Serkan Özal (Jira)]

Serkan Özal created JASSIST-273:
-----------------------------------

             Summary: `Inconsistent stackmap frames` issue while instrumenting Kotlin anonymous class
                 Key: JASSIST-273
                 URL: https://issues.jboss.org/browse/JASSIST-273
             Project: Javassist
          Issue Type: Bug
            Reporter: Serkan Özal
            Assignee: Shigeru Chiba


https://github.com/serkan-ozal/javassist-issue-report/blob/master/src/main/java/ozal/serkan/javassist/issue/report/RunnerInstrumentation.java reproduces the following issue:

{code:java}
Exception in thread "main" java.lang.VerifyError: Inconsistent stackmap frames at branch target 170
Exception Details:
  Location:
    ozal/serkan/javassist/issue/report/Runner$run$result$1.invokeSuspend(Ljava/lang/Object;)Ljava/lang/Object; @98: goto
  Reason:
    Current frame's stack size doesn't match stackmap.
  Current Frame:
    bci: @98
    flags: { }
    locals: { 'ozal/serkan/javassist/issue/report/Runner$run$result$1', 'java/lang/Object', 'kotlinx/coroutines/CoroutineScope', top, top, 'java/lang/Object' }
    stack: { 'java/lang/Object', 'java/lang/Object' }
  Stackmap Frame:
    bci: @170
    flags: { }
    locals: { 'ozal/serkan/javassist/issue/report/Runner$run$result$1', 'java/lang/Object', top, top, top, 'java/lang/Object' }
    stack: { 'java/lang/Object' }
  Bytecode:
    0x0000000: b200 b812 bab6 0062 b800 203a 052a b400
    0x0000010: 24aa 0000 0000 008f 0000 0000 0000 0001
    0x0000020: 0000 0017 0000 0054 2b59 c100 2699 000a
    0x0000030: c000 26b4 002a bf57 2ab4 002c 4d00 b200
    0x0000040: 320a b600 36bb 0038 592a 01b7 003c c000
    0x0000050: 072a 2a04 b500 24b8 0042 5919 05a6 0019
    0x0000060: 1905 a700 482b 59c1 0026 9900 0ac0 0026
    0x0000070: b400 2abf 572b c000 444e a700 223a 04b2
    0x0000080: 004a bb00 4c59 b700 4f12 51b6 0055 1904
    0x0000090: b600 58b6 005c b600 6212 644e 2da7 000d
    0x00000a0: bb00 6659 1268 b700 6abf 3a07 b200 b812
    0x00000b0: bcb6 0062 1907 b0                      
  Exception Handler Table:
    bci [61, 90] => handler: 125
    bci [101, 122] => handler: 125
  Stackmap Table:
    full_frame(@40,{Object[#2],Object[#113],Top,Top,Top,Object[#113]},{})
    same_locals_1_stack_item_frame(@55,Object[#113])
    same_frame(@101)
    same_locals_1_stack_item_frame(@116,Object[#113])
    full_frame(@118,{Object[#2],Object[#113],Top,Top,Top,Object[#113]},{Object[#113]})
    same_locals_1_stack_item_frame(@125,Object[#26])
    full_frame(@156,{Object[#2],Object[#113],Top,Object[#68],Top,Object[#113]},{})
    full_frame(@160,{Object[#2],Object[#113],Top,Top,Top,Object[#113]},{})
    full_frame(@170,{Object[#2],Object[#113],Top,Top,Top,Object[#113]},{Object[#113]})

	at ozal.serkan.javassist.issue.report.Runner.run(Runner.kt:19)
	at ozal.serkan.javassist.issue.report.RunnerInstrumentation.main(RunnerInstrumentation.java:35)
{code}

The problem is that while instrumenting {{ozal.serkan.javassist.issue.report.Runner$run$result$1}} anonymous Kotlin class, the stackmap inconsistency raises.



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