compiler-rt/test/msan/interception_sigaction_test.cpp

   1 // RUN: %clangxx_msan -O0 -g %s -o %t
   2 // RUN: MSAN_OPTIONS=handle_segv=2 %t 2>&1 | FileCheck %s
   3 #include <stdlib.h>
   4 #include <stdio.h>
   5 #include <unistd.h>
   6 #include <signal.h>
   7 #include <string.h>
   8
   9 extern "C" int __interceptor_sigaction(int signum, const struct sigaction *act, struct sigaction *oldact);
  10 extern "C" int sigaction(int signum, const struct sigaction *act, struct sigaction *oldact) {
  11   write(2, "sigaction call\n", sizeof("sigaction call\n") - 1);
  12   return __interceptor_sigaction(signum, act, oldact);
  13 }
  14
  15 int main() {
  16   struct sigaction oldact;
  17   sigaction(SIGSEGV, nullptr, &oldact);
  18
  19   if (oldact.sa_handler || oldact.sa_sigaction) {
  20     fprintf(stderr, "oldact filled\n");
  21   }
  22   return 0;
  23   // CHECK: sigaction call
  24   // CHECK: oldact filled
  25 }