Getting stacktrace for userspace applications on crash(SIGSEGV)

[Daniel.]

Hi Harish, thank you for replying me :)

Here it is a sample of what I see:

(gdb) bt
#0  0x76e5ed64 in __GI_raise (sig=sig at entry=6)
    at ../nptl/sysdeps/unix/sysv/linux/raise.c:56
#1  0x76e627f8 in __GI_abort () at abort.c:89
#2  0x76831b7c in ?? () from /opt/jdk1.8.0_60/jre/lib/arm/client/libjvm.so
#3  0x76831b7c in ?? () from /opt/jdk1.8.0_60/jre/lib/arm/client/libjvm.so
Backtrace stopped: previous frame identical to this frame (corrupt stack?)


Best regards,

2016-09-09 17:00 GMT-03:00 Harish <harish.b310 at gmail.com>:
>
>    My guess is that gdb is failing to walk the Java frames. Could you post what you see in the gdb when you ask for the backtrace? I can possibly try and help then.
>
> Regards,
> Harish
>
>> On 10-Sep-2016, at 12:46 AM, Rami Rosen <roszenrami at gmail.com> wrote:
>>
>> Hi,
>> Do u know where in the kernel it crashes and can add dump_stack()
>> there and try ? I used dump_stack() in the past many times and it
>> worked for me. IIRC, kernel hacking->Kernel debugging was selected in
>> my kernekl config, and I did not had to to anything else
>>
>> Regards,
>> Rami Rosen
>> http://ramirose.wix.com/ramirosen
>>
>>
>>> On 9 September 2016 at 21:21, Daniel. <danielhilst at gmail.com> wrote:
>>> Hi everybody,
>>>
>>> I'm debugging a library that implement some nasty protocol. This
>>> library is used by some JNI library which exports the native library
>>> to Java world. By the way I'm running on ARMv7.
>>>
>>> Well, some times, at random times, that library crashes. The problem
>>> is that I can't get stacktrace. Not from JVM's fatal errors logs, not
>>> from core dumps, not from libSegFault... I'm using "-g -rdynamic
>>> -funwind-tables -mapcs-frame" compiler options but still I can't get a
>>> stacktrace. I've tried using glibc backtrace too. What I don't tried
>>> yet: libunwind, valgrid and making kernel do the stacktrace. The cool
>>> part is that when I ran my library outside from the JVM (with native
>>> application) I do get backtraces! [Damn Java]
>>>
>>> I'm here to ask: Is it possible to make kernel print the stacktrace
>>> for some userspace application when it crashes?
>>>
>>> I saw USER_STACKTRACE_SUPPORT but can't find any help from it's
>>> Kconfig. I saw this https://kernelnewbies.org/FAQ/StackTrace and this
>>> http://processors.wiki.ti.com/index.php/Enabling_Stack_Dumping_in_Linux_Kernel
>>> but can't find "Kernel hacking -> Verbose kernel error messages" even
>>> with "Kernel hacking -> Kernel Debuggin" enabled.
>>>
>>> Any help is appreciated! Thanks !!!
>>>
>>> --
>>> "Do or do not. There is no try"
>>>  Yoda Master
>>>
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>>> Kernelnewbies at kernelnewbies.org
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>>
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-- 
"Do or do not. There is no try"
  Yoda Master