My android native application crashes randomly but frequently, and I am unable to get sufficient info out ndk-gdb. This is the message following the crash:
Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 19983]
0x4012c6ac in memcpy () from /Users/Andreas/dev/android/obj/local/armeabi-v7a/libc.so
bt returns an unusable callstack:
#0 0x4012c6ac in memcpy () from /Users/Andreas/dev/android/obj/local/armeabi-v7a/libc.so
#1 0x67337388 in ?? ()
Cannot access memory at address 0x7
#2 0x67337388 in ?? ()
Cannot access memory at address 0x7
Backtrace stopped: previous frame identical to this frame (corrupt stack?)
I am using NDK-r8e
I have checked all uses of memcpy() in my program and they're not responsible for this (verified by making them call another memcpy-like function with a different name, and still getting the above crash with the exact signature).
Any ideas how to get a more useable call stack, or to further debug this? Does the NDK offer any memory check functionality in case this is a memory overwrite?