Method checkFault

src/stackWalker.cpp:505–524

}

void StackWalker::checkFault() {
    // Search for a crash protection context located on the current thread stack.
    // Since one thread may use multiple contexts because of simultaneous profiling engines,
    // we need to walk through all of them and find the nearest one (i.e. the most recent).
    jmp_buf* nearest_ctx = NULL;
    uintptr_t stack_distance = 32768;  // maximum allowed stack distance
    const uintptr_t current_sp = (uintptr_t)&nearest_ctx;

    for (int i = 0; i < CONCURRENCY_LEVEL; i++) {
        jmp_buf* ctx = crash_protection_ctx[i];
        if ((uintptr_t)ctx - current_sp < stack_distance) {
            nearest_ctx = ctx;
            stack_distance = (uintptr_t)ctx - current_sp;
        }
    }

    if (nearest_ctx != NULL) {
        longjmp(*nearest_ctx, 1);
    }
}