Re: How to catch GDB crash

[Dmitry Smirnov <divis1969@mail.ru>]

Hi,

I'm sorry guys, but I believe we are going wrong way. 
First, I suppose I do not need JIT: as I said, I can attach to the 
running arm-elf-gdb before the crash. I supposed that GDB is smart 
enough to catch system exceptions. Moreover, I have some indication 
of that: my skyeye is Cygwin-compiled program and when I run it in 
Eclipse (which uses Cygwin GDB as a debugger for this program), I can 
see the follwing stack:
-----------------
Skyeye_1.2.4 Cygwin GCC [C/C++ Local Application]	
	Cygwin gdb Debugger (23.06.08 20:12) (Suspended)	
		Thread [1] (Suspended: Signal 'SIGSEGV' received. Description: Segmentation fault.)	
			3 RpcRaiseException()  0x77ea27ea	
			2 h_errno()  0x662b7258	
			1 <symbol is not available> 0x00000000	
		Thread [2] (Suspended)	
	gdb (23.06.08 20:12)	
	D:\Dvs\Project\Skyeye_1.2.4\binary\skyeye.exe (23.06.08 20:12)	
----------------------
Here is the stack of command-line GDB:
----------------------
Program received signal SIGSEGV, Segmentation fault.
0x77ea27ea in RpcRaiseException () from /c/WINDOWS/system32/rpcrt4.dll
(gdb) info stack
#0  0x77ea27ea in RpcRaiseException () from /c/WINDOWS/system32/rpcrt4.dll
#1  0x662b7258 in h_errno () from /c/WINDOWS/system32/hnetcfg.dll
#2  0x00000000 in ?? () from
------------------------

I'm 99% sure that Cygwin GDB can intersept these sygnals.

Am I wrong? Perhaps this a Cygwin_libs-generated signal?

Second, as I mentioned in first mail, someone is trying to save the 
crashdump file. Who's that guy? Why it fails to save? Can I set a breakpoint 
just before he starts to save (e.g. when it detects the crash)?

Is it possible that arm-elf-gdb itself is handling some signals thus preventing 
Cygwin GDB from handling it? Where is that code?

Dmitry