compiler-rt/test/msan/sigaction.cpp

   1 // RUN: %clangxx_msan -std=c++11 -O0 -g %s -o %t
   2 // RUN: %run %t __
   3 // RUN: not %run %t A_ 2>&1 | FileCheck %s
   4 // RUN: not %run %t AH 2>&1 | FileCheck %s
   5 // RUN: not %run %t B_ 2>&1 | FileCheck %s
   6 // RUN: not %run %t BH 2>&1 | FileCheck %s
   7 // RUN: not %run %t C_ 2>&1 | FileCheck %s
   8 // RUN: not %run %t CH 2>&1 | FileCheck %s
   9
  10 #include <assert.h>
  11 #include <signal.h>
  12 #include <string.h>
  13 #include <sys/time.h>
  14 #include <unistd.h>
  15
  16 #include <sanitizer/msan_interface.h>
  17
  18 void handler(int) {}
  19 void action(int, siginfo_t *, void *) {}
  20
  21 int main(int argc, char **argv) {
  22   char T = argv[1][0];
  23   char H = argv[1][1];
  24   struct sigaction sa;
  25   memset(&sa, 0, sizeof(sa));
  26   if (H == 'H') {
  27     sa.sa_handler = handler;
  28   } else {
  29     sa.sa_sigaction = action;
  30     sa.sa_flags = SA_SIGINFO;
  31   }
  32
  33   if (T == 'A') {
  34     if (H == 'H')
  35       __msan_poison(&sa.sa_handler, sizeof(sa.sa_handler));
  36     else
  37       __msan_poison(&sa.sa_sigaction, sizeof(sa.sa_sigaction));
  38   }
  39   if (T == 'B')
  40     __msan_poison(&sa.sa_flags, sizeof(sa.sa_flags));
  41   if (T == 'C')
  42     __msan_poison(&sa.sa_mask, sizeof(sa.sa_mask));
  43   // CHECK: use-of-uninitialized-value
  44   int res = sigaction(SIGUSR1, &sa, nullptr);
  45   assert(res == 0);
  46   return 0;
  47 }