compiler-rt/test/safestack/pthread.c

   1 // RUN: %clang_safestack %s -pthread -o %t
   2 // RUN: %run %t
   3
   4 // Test that pthreads receive their own unsafe stack.
   5
   6 #include <stdlib.h>
   7 #include <string.h>
   8 #include <pthread.h>
   9 #include "utils.h"
  10
  11 static int ptr_test = 42;
  12
  13 void *t1_start(void *ptr)
  14 {
  15   if (ptr != &ptr_test)
  16     abort();
  17
  18   // safe stack
  19   int val = ptr_test * 5;
  20
  21   // unsafe stack
  22   char buffer[8096]; // two pages
  23   memset(buffer, val, sizeof (buffer));
  24   break_optimization(buffer);
  25
  26   return ptr;
  27 }
  28
  29 int main(int argc, char **argv)
  30 {
  31   pthread_t t1;
  32   void *ptr = NULL;
  33   if (pthread_create(&t1, NULL, t1_start, &ptr_test))
  34     abort();
  35   if (pthread_join(t1, &ptr))
  36     abort();
  37   if (ptr != &ptr_test)
  38     abort();
  39   return 0;
  40 }