src/libcompiler_builtins/compiler-rt/test/safestack/pthread.c

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