tests/helpers/stackoverflow_crash.c

   1 #include<stdio.h>
   2 #include<sys/resource.h>
   3
   4 static volatile int * array1_ref = NULL;
   5 static long last_stack_addr = 0;
   6
   7 static void
   8 recursive_fn(void)
   9 {
  10         volatile int array1[1024]; /* leave this as it is */
  11         int addr;
  12         last_stack_addr = (long)&addr;
  13         array1_ref = array1; /* make sure compiler cannot discard storage */
  14         array1[0] = 0;
  15         if (array1_ref == 0) {
  16                 /* fool clang -Winfinite-recursion */
  17                 return;
  18         }
  19         recursive_fn();
  20         return;
  21 }
  22
  23 int
  24 main(__unused int argc, __unused const char *argv[])
  25 {
  26         struct rlimit save;
  27
  28         if (getrlimit(RLIMIT_STACK, &save) == -1) {
  29                 printf("child: ERROR - getrlimit");
  30                 return 2;
  31         }
  32         printf("child: LOG - current stack limits cur=0x%llx, max=0x%llx, inf=0x%llx\n", save.rlim_cur, save.rlim_max, RLIM_INFINITY);
  33
  34         if(save.rlim_cur >= save.rlim_max) {
  35                 printf("child: ERROR - invalid limits");
  36                 return 2;
  37         }
  38
  39         if(save.rlim_max == RLIM_INFINITY) {
  40                 printf("child: ERROR - rlim_max = RLIM_INFINITY");
  41                 return 2;
  42         }
  43
  44         save.rlim_cur += 4;
  45
  46         printf("child: LOG - Raising setrlimit rlim_cur=0x%llx, rlim_max=0x%llx\n", save.rlim_cur, save.rlim_max);
  47
  48         if (setrlimit(RLIMIT_STACK, &save) == -1) {
  49                 printf("child: ERROR - Raising the limits failed.");
  50                 return 2;
  51         }
  52
  53         printf("child: LOG - Make the stack grow such that a SIGSEGV is generated.\n");
  54         recursive_fn();
  55         return 0;
  56 }