catchsegv

Run program with segfault catching

$ catchsegv [./program]

$ catchsegv [./program] [arg1] [arg2]

catchsegv program [args...]

catchsegv intercepts segmentation faults and prints a symbolic backtrace. Uses LD_PRELOAD to load libSegFault.so which installs a SIGSEGV handler.
Part of glibc debug utilities.

SEGFAULT_OUTPUT_NAME

Output file (default: stderr)

Signals to handle: segv, ill, bus, stkflt, abrt, fpe

Use alternate stack for handler

Compile with -g flag for function names and line numbers in backtrace:

$ gcc -g -o program program.c

- GDB with core dumps
- AddressSanitizer (-fsanitize=address)
- Custom signal handlers with backtrace()
- Valgrind

Removed from glibc 2.35+. Modern alternatives include out-of-process debuggers and post-mortem analysis tools. Uses non-async-signal-safe functions in handler.

gdb(1), addr2line(1), backtrace(3)