I m constructing a C++ program in which I need to handle SIGSEGV and Signal handler should be able to print the Back Trace. Can any one help in this.
Regards
The best way to get a SIGSEV backtrace is generating a core file more than printing a backtrace. Take care beacause if you handle SIGSEV the system will not call the default core generator.
If you want to handle the SIGSEV anyway (as have been commented before this is system deppendant), see the libc backtrace function [http://www.gnu.org/s/libc/manual/html_node/Backtraces.html ] , it could be useful.
Adding to what Jon replied, you basically need a function like this to print backtrace. This function shoudl be called on the SIGSEGV. But I second Jon's point that letting the system generate corefile would be a much better debugging mechanism for you
void print_trace(int nSig)
{
printf("print_trace: got signal %d\n", nSig);
void *array[32]; /* Array to store backtrace symbols */
size_t size; /* To store the exact no of values stored */
char **strings; /* To store functions from the backtrace list in ARRAY */
size_t nCnt;
size = backtrace(array, 32);
strings = backtrace_symbols(array, size);
/* prints each string of function names of trace*/
for (nCnt = 0; nCnt < size; nCnt++)
fprintf(stderr, "%s\n", strings[nCnt]);
exit(-1);
}
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