| 297 | } |
| 298 | |
| 299 | void register_signal_handler(FILE * const output) |
| 300 | { |
| 301 | signalOutput = output; |
| 302 | |
| 303 | // determine stack vs. heap |
| 304 | char stackVariable; |
| 305 | char *heapVariable=static_cast<char*>(malloc(1)); |
| 306 | bStackBelowHeap = &stackVariable < heapVariable; |
| 307 | free(heapVariable); |
| 308 | |
| 309 | // set up alternative stack for signal handler |
| 310 | stack_t segv_stack; |
| 311 | segv_stack.ss_sp = mytstack; |
| 312 | segv_stack.ss_flags = 0; |
| 313 | segv_stack.ss_size = MYSTACKSIZE; |
| 314 | if (sigaltstack(&segv_stack, nullptr) != 0) { |
| 315 | // TODO: log errno |
| 316 | fputs("could not set alternate signal stack context.\n", output); |
| 317 | std::exit(EXIT_FAILURE); |
| 318 | } |
| 319 | |
| 320 | // install signal handler |
| 321 | struct sigaction act; |
| 322 | memset(&act, 0, sizeof(act)); |
| 323 | act.sa_flags=SA_SIGINFO|SA_ONSTACK; |
| 324 | act.sa_sigaction=CppcheckSignalHandler; |
| 325 | for (auto sig=listofsignals.cbegin(); sig!=listofsignals.cend(); ++sig) { |
| 326 | sigaction(sig->first, &act, nullptr); |
| 327 | } |
| 328 | } |
| 329 | |
| 330 | #endif |