Hi Rami Thanks for your reply I'm asking if I can use kernel to dump a stacktrace for a userspace app instead of kernel code. I'm trying that as last resource since gdb, libSegFault and JVM's fatal error log had failed, Best regards, 2016-09-09 16:16 GMT-03:00 Rami Rosen <roszenrami@xxxxxxxxx>: > 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@xxxxxxxxx> 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 >> >> _______________________________________________ >> Kernelnewbies mailing list >> Kernelnewbies@xxxxxxxxxxxxxxxxx >> https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies -- "Do or do not. There is no try" Yoda Master _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
