compiler-rt/test/hwasan/TestCases/memcpy.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 <sanitizer/hwasan_interface.h>
   7 #include <stdlib.h>
   8 #include <string.h>
   9 #include <unistd.h>
  10
  11 __attribute__((no_sanitize("hwaddress"))) void
  12 ForceCallInterceptor(void *p, const void *a, size_t size) {
  13   memcpy(p, a, size);
  14 }
  15
  16 int main(int argc, char **argv) {
  17   __hwasan_enable_allocator_tagging();
  18   char a[] = {static_cast<char>(argc), 2, 3, 4};
  19   int size = sizeof(a);
  20   char *volatile p = (char *)malloc(size);
  21   free(p);
  22   ForceCallInterceptor(p, a, size);
  23   return 0;
  24   // CHECK: HWAddressSanitizer: tag-mismatch on address
  25   // CHECK: WRITE of size 4
  26   // CHECK: #{{[[:digit:]]+}} 0x{{[[:xdigit:]]+}} in main {{.*}}memcpy.cpp:[[@LINE-4]]
  27   // CHECK: Cause: use-after-free
  28   // CHECK: freed by thread
  29   // CHECK: #{{[[:digit:]]+}} 0x{{[[:xdigit:]]+}} in main {{.*}}memcpy.cpp:[[@LINE-8]]
  30   // CHECK: previously allocated by thread
  31   // CHECK: #{{[[:digit:]]+}} 0x{{[[:xdigit:]]+}} in main {{.*}}memcpy.cpp:[[@LINE-11]]
  32 }