JDK-6584008 (jvmtiStringPrimitiveCallback should not be invoked when string value is null) in 1.7.0_45

[serguei.spitsyn at oracle.com]

Hi Harry,

Thank you a lot for reporting this crash as it is quite helpful!

I've updated the bug report description with your information:
   https://bugs.openjdk.java.net/browse/JDK-6584008


Thanks,
Serguei


On 1/3/14 1:40 PM, Leitzell, Harry wrote:
> I believe I've run into this bug's race condition while using Dynatrace's
> JVMTI profiling: https://bugs.openjdk.java.net/browse/JDK-6584008
>
> I don't have time to write a patch right now that I think would be
> accepted but I can if desired.
>
>
> **SNIP**
>
> #  SIGSEGV (0xb) at pc=0x00002ad23bcf3d2b, pid=2934, tid=1090189632
> #
> # JRE version: Java(TM) SE Runtime Environment (7.0_45-b18) (build
> 1.7.0_45-b18)
> # Java VM: Java HotSpot(TM) 64-Bit Server VM (24.45-b08 mixed mode
> linux-amd64 compressed oops)
> # Problematic frame:
> # V  [libjvm.so+0x708d2b]  invoke_string_value_callback(int (*)(long,
> long, long*, unsigned short const*, int, void*), CallbackWrapper*,
> oopDesc*, void*)+0x11b
>
>
> **SNIP**
>
> ---------------  T H R E A D  ---------------
> Current thread (0x00002aaab02d5000):  VMThread [stack:
> 0x0000000040eaf000,0x0000000040fb0000] [id=2966]
> siginfo:si_signo=SIGSEGV: si_errno=0, si_code=1 (SEGV_MAPERR),
> si_addr=0x000000000000000c
>
>
> **SNIP**
>
> Register to memory mapping:
> RAX=0x000000000000000c is an unknown value
> RBX=0x000000062789c4a0 is an oop
> java.lang.String
>   - klass: 'java/lang/String'
> RCX=0x0000000000000000 is an unknown value
> RDX=0x000000062789c4a0 is an oop
> java.lang.String
>   - klass: 'java/lang/String'
> RSP=0x0000000040faecc0 is an unknown value
> RBP=0x0000000040faecc0 is an unknown value
> RSI=0x00002ad23c418e58: <offset 0xe2de58> in
> /local/jdk1.7.0_45/jre/lib/amd64/server/libjvm.so at 0x00002ad23b5eb000
> RDI=0x00002ad23c41a550: <offset 0xe2f550> in
> /local/jdk1.7.0_45/jre/lib/amd64/server/libjvm.so at 0x00002ad23b5eb000
> R8 =0x0000000000000000 is an unknown value
> R9 =0x0000000040faecd0 is an unknown value
> R10=0x0000000045c63650 is pointing into the stack for thread:
> 0x00002aae38027000
> R11=0x00002aaaab71c9ea: <offset 0x599ea> in
> /local/dynatrace/agent/downloads/5.5.0.5562/native/linux-x86-64/libdtagentc
> ore.so at 0x00002aaaab6c3000
> R12=0x0000000045c63130 is pointing into the stack for thread:
> 0x00002aae38027000
> R13=0x00002ad23c418e58: <offset 0xe2de58> in
> /local/jdk1.7.0_45/jre/lib/amd64/server/libjvm.so at 0x00002ad23b5eb000
> R14=0x0000000040faecd0 is an unknown value
> R15=0x0000000000000000 is an unknown value
>
>
> Stack: [0x0000000040eaf000,0x0000000040fb0000],  sp=0x0000000040faecc0,
> free space=1023k
> Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native
> code)
> V  [libjvm.so+0x708d2b]  invoke_string_value_callback(int (*)(long, long,
> long*, unsigned short const*, int, void*), CallbackWrapper*, oopDesc*,
> void*)+0x11b
> V  [libjvm.so+0x70a9d6]
> IterateThroughHeapObjectClosure::do_object(oopDesc*)+0x476
> V  [libjvm.so+0x8c8dca]  ContiguousSpace::object_iterate_from(WaterMark,
> ObjectClosure*)+0x7a
> V  [libjvm.so+0x5628bb]
> GenCollectedHeap::object_iterate(ObjectClosure*)+0x3b
> V  [libjvm.so+0x70b8e3]  VM_HeapIterateOperation::doit()+0x43
> V  [libjvm.so+0x99b955]  VM_Operation::evaluate()+0x55
> V  [libjvm.so+0x999d8a]  VMThread::evaluate_operation(VM_Operation*)+0xba
> V  [libjvm.so+0x99a10e]  VMThread::loop()+0x1ce
> V  [libjvm.so+0x99a580]  VMThread::run()+0x70
> V  [libjvm.so+0x815288]  java_start(Thread*)+0x108
>
> VM_Operation (0x0000000045c63170): HeapIterateOperation, mode: safepoint,
> requested by thread 0x00002aae38027000
>
>
>
> Cheers,
> Harry
>
> Harry Leitzell | Principal Performance Engineer, eCommerce | W.W.
> Grainger, Inc.
> 500 W Madison St, Suite 3300 | Chicago, IL 60661-4512 | +1 (312) 802-7400
>
>
>
>