compiler-rt/test/asan/TestCases/Linux/calloc-preload.c

   1 // Test that initially callocked memory is properly freed
   2 // (see https://github.com/google/sanitizers/issues/626).
   3 //
   4 // RUN: %clang %s -o %t
   5 // RUN: env LD_PRELOAD=%shared_libasan %run %t
   6 //
   7 // REQUIRES: asan-dynamic-runtime
   8 //
   9 // This way of setting LD_PRELOAD does not work with Android test runner.
  10 // REQUIRES: !android
  11
  12 #include <stdio.h>
  13 #include <stdlib.h>
  14
  15 static void *ptr;
  16
  17 // This constructor will run before __asan_init
  18 // so calloc will allocate memory from special pool.
  19 static void init() {
  20   ptr = calloc(10, 1);
  21 }
  22
  23 __attribute__((section(".preinit_array"), used))
  24 void *dummy = init;
  25
  26 void free_memory() {
  27   // This used to abort because
  28   // Asan's free didn't recognize ptr.
  29   free(ptr);
  30 }
  31
  32 int main() {
  33   free_memory();
  34   return 0;
  35 }
  36