DeathHandler | SIGSEGV handler which prints the debug stack trace | Code Inspection library

DeathHandler is a C++ library typically used in Code Quality, Code Inspection applications. DeathHandler has no bugs, it has no vulnerabilities and it has low support. You can download it from GitHub.

DeathHandler C03+ class installs SEGFAULT, SIGABRT and SIGFPE signal handlers to print a nice stack trace and (if requested) generate a core dump. In DeathHandler's constructor, signal handlers are installed through `sigaction()`. If your program encounters a segmentation fault, the call stack is unwinded with `backtrace()`, converted into function names with line numbers via `addr2line` (`fork()` + `execlp()`). Addresses from shared libraries are also converted thanks to dladdr(). All C symbols are demangled. Printed stack trace includes the faulty thread id obtained with pthread_self() and each line contains the process id to distinguish several stack traces printed by different processes at the same time. The code works primarily on Linux and tested on x86_64 and ARM with glibc. Besides, there is a partial support of MacOSX (addr2line → atos is not implemented). Since backtrace() uses malloc() and the heap my be corrupted by the time it is called, malloc() and free() have to be overridden. On Linux, it is done via a simple symbol overload; on MacOSX, malloc_default_zone() approach is taken because overloading does not work out of the box.