compiler-rt/test/scudo/preinit.c

   1 // RUN: %clang_scudo %s -o %t
   2 // RUN: %run %t 2>&1
   3
   4 // Verifies that calling malloc in a preinit_array function succeeds, and that
   5 // the resulting pointer can be freed at program termination.
   6
   7 // On some Android versions, calling mmap() from a preinit function segfaults.
   8 // It looks like __mmap2.S ends up calling a NULL function pointer.
   9 // UNSUPPORTED: android
  10
  11 #include <assert.h>
  12 #include <stdlib.h>
  13 #include <string.h>
  14
  15 static void *global_p = NULL;
  16
  17 void __init(void) {
  18   global_p = malloc(1);
  19   if (!global_p)
  20     exit(1);
  21 }
  22
  23 void __fini(void) {
  24   if (global_p)
  25     free(global_p);
  26 }
  27
  28 int main(int argc, char **argv) {
  29   void *p = malloc(1);
  30   assert(p);
  31   free(p);
  32
  33   return 0;
  34 }
  35
  36 __attribute__((section(".preinit_array"), used)) void (*__local_preinit)(void) = __init;
  37 __attribute__((section(".fini_array"), used)) void (*__local_fini)(void) = __fini;