compiler-rt/test/hwasan/TestCases/memcmp.cpp

   1 // RUN: %clangxx_hwasan -O0 %s -o %t && not %run %t 2>&1 | FileCheck %s
   2 // RUN: %clangxx_hwasan -O1 %s -o %t && not %run %t 2>&1 | FileCheck %s
   3 // RUN: %clangxx_hwasan -O2 %s -o %t && not %run %t 2>&1 | FileCheck %s
   4 // RUN: %clangxx_hwasan -O3 %s -o %t && not %run %t 2>&1 | FileCheck %s
   5
   6 #include <assert.h>
   7 #include <sanitizer/hwasan_interface.h>
   8 #include <stdlib.h>
   9 #include <string.h>
  10 #include <unistd.h>
  11
  12 __attribute__((no_sanitize("hwaddress"))) void
  13 ForceCallInterceptor(void *p, const void *a, size_t size) {
  14   assert(memcmp(p, a, size) == 0);
  15 }
  16
  17 int main(int argc, char **argv) {
  18   __hwasan_enable_allocator_tagging();
  19   char a[] = {static_cast<char>(argc), 2, 3, 4};
  20   int size = sizeof(a);
  21   char *p = (char *)malloc(size);
  22   memcpy(p, a, size);
  23   free(p);
  24   ForceCallInterceptor(p, a, size);
  25   return 0;
  26   // CHECK: HWAddressSanitizer: tag-mismatch on address
  27   // CHECK: READ of size 4
  28   // CHECK: #{{[[:digit:]]+}} 0x{{[[:xdigit:]]+}} in main {{.*}}memcmp.cpp:[[@LINE-4]]
  29   // CHECK: Cause: use-after-free
  30   // CHECK: freed by thread
  31   // CHECK: #{{[[:digit:]]+}} 0x{{[[:xdigit:]]+}} in main {{.*}}memcmp.cpp:[[@LINE-8]]
  32   // CHECK: previously allocated by thread
  33   // CHECK: #{{[[:digit:]]+}} 0x{{[[:xdigit:]]+}} in main {{.*}}memcmp.cpp:[[@LINE-12]]
  34 }