Crash in the MallocTracker::record_free

[David Holmes]

Hi Thomas,

On 15/08/2022 3:42 pm, Thomas Stüfe wrote:
> ..The only way I could see this happening is if tty itself is not valid. 
> Is this very early during initialization?

Quite the opposite, it is during VM termination.

Cheers,
David

> On Mon, Aug 15, 2022 at 7:40 AM Thomas Stüfe <thomas.stuefe at gmail.com 
> <mailto:thomas.stuefe at gmail.com>> wrote:
> 
>     Hi David,
> 
>     NMT detected a heap corruption or the pointer to be freed is
>     invalid. And then the reporter itself crashed while printing the
>     report. That is strange, since the reporter should be resilient
>     against crashes. It uses os::print_hex_dump, which should use
>     SafeFetch to check if the to-be-dumped info is accessible.
> 
>     Any more information?
> 
>     Cheers, Thomas
> 
>     On Mon, Aug 15, 2022 at 7:18 AM David Holmes
>     <david.holmes at oracle.com <mailto:david.holmes at oracle.com>> wrote:
> 
>         I'm getting the below crash:
> 
>         #
>         # A fatal error has been detected by the Java Runtime Environment:
>         #
>         #  SIGSEGV (0xb) at pc=0x00007f3e3e24b417, pid=4537, tid=4538
>         #
>         # JRE version: Java(TM) SE Runtime Environment (20.0) (fastdebug
>         build
>         20-internal-2022-06-10-0001400.daholme...)
>         # Java VM: Java HotSpot(TM) 64-Bit Server VM (fastdebug
>         20-internal-2022-06-10-0001400.daholme..., mixed mode, sharing,
>         tiered,
>         compressed oops, compressed class ptrs, g1 gc, linux-amd64)
>         # Problematic frame:
>         # V  [libjvm.so+0x174b417]  outputStream::print_cr(char const*,
>         ...)+0x67
> 
>         ---------------  T H R E A D  ---------------
> 
>         Current thread (0x00007f3e38029890):  Thread "Unknown thread"
>         [stack:
>         0x00007f3e3f8a9000,0x00007f3e3f9aa000] [id=4538]
> 
>         Stack: [0x00007f3e3f8a9000,0x00007f3e3f9aa000], 
>         sp=0x00007f3e3f9a84b0,
>         free space=1021k
>         Native frames: (J=compiled Java code, j=interpreted, Vv=VM code,
>         C=native code)
>         V  [libjvm.so+0x174b417]  outputStream::print_cr(char const*,
>         ...)+0x67
>         V  [libjvm.so+0x157d708]
>         MallocHeader::print_block_on_error(outputStream*, unsigned
>         char*) const+0x38
>         V  [libjvm.so+0x157f2ef]  MallocHeader::assert_block_integrity()
>         const+0x10f
>         V  [libjvm.so+0x157eb6b]  MallocTracker::record_free(void*)+0x3b
>         V  [libjvm.so+0x172d3ef]  os::free(void*)+0xbf
>         V  [libjvm.so+0x1a6d77a]  Thread::~Thread()+0x8a
>         V  [libjvm.so+0x1060292]  JavaThread::~JavaThread()+0x12
>         V  [libjvm.so+0x1a8b174]  Threads::destroy_vm()+0x264
> 
>         Any tips on trying to figure out what is going wrong?
> 
>         Thanks,
>         David
>