compiler-rt/test/hwasan/TestCases/memset-recover.cpp

   1 // RUN: %clangxx_hwasan %s -o %t
   2 // RUN: %env_hwasan_opts=halt_on_error=0 not %run %t 2>&1 | FileCheck %s --implicit-check-not=RETURN_FROM_TEST --check-prefixes=CHECK,RECOVER
   3 // RUN: %env_hwasan_opts=halt_on_error=1 not %run %t 2>&1 | FileCheck %s --implicit-check-not=RETURN_FROM_TEST
   4
   5 #include <sanitizer/hwasan_interface.h>
   6 #include <stdio.h>
   7 #include <stdlib.h>
   8 #include <string.h>
   9 #include <unistd.h>
  10
  11 __attribute__((no_sanitize("hwaddress"))) void
  12 ForceCallInterceptor(void *p, int c, size_t size) {
  13   memset(p, c, size) == nullptr;
  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   void *volatile p2 = p;
  22   for (int i = 0; p2 == p; p2 = __hwasan_tag_pointer(p, ++i)) {
  23   }
  24   ForceCallInterceptor(p2, 0, size);
  25   free(p);
  26   fprintf(stderr, "RETURN_FROM_TEST\n");
  27   return 0;
  28   // CHECK: HWAddressSanitizer: tag-mismatch on address
  29   // CHECK: WRITE of size 4
  30   // CHECK: #{{[[:digit:]]+}} 0x{{[[:xdigit:]]+}} in main {{.*}}memset-recover.cpp:[[@LINE-28]]
  31   // RECOVER: RETURN_FROM_TEST
  32 }