Hello, [gcc/g++ 4.3 on i386, linux] In our SIGSEGV handler we want to make a backtrace to get some context in a generated bug report. This works fine in most cases. However, when doing a virtual function call on an non initialized C++ object this can lead to calling an arbitrary address. And in the backtrace call, GCC generates a new SIGSEGV when attempting to trace around that address. GCC then shuts down the app. I tried installing a local SIGSEGV handler guarding the call to backtrace, to catch this case, but it never got invoked. Is there some way to reliably make a backtrace from inside a SIGSEGV handler? The alternative I can think of is to do memcpy on a chunk of the current stack and then call backtrace at some later point, using this saved data, when a temporary SIGSEGV handler can detect when backtrace does invalid memory access. But, I cannot find a backtrace variant that works with a stack copy in this way. Advice? Regards // ATS.
