File: hwasan-print-shadow.cpp

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llvm-toolchain-13 1%3A13.0.1-11
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// RUN: %clangxx_hwasan -DSIZE=16 -O0 %s -o %t && %run %t 2>&1 | FileCheck %s

// REQUIRES: stable-runtime

#include <assert.h>
#include <stdlib.h>
#include <sys/mman.h>
#include <sanitizer/hwasan_interface.h>

int main() {
  void *alloc = malloc(4096);

  // __hwasan_tag_memory expects untagged pointers.
  char *p = (char *)__hwasan_tag_pointer(alloc, 0);
  assert(p);

  __hwasan_tag_memory(p, 1, 32);
  __hwasan_tag_memory(p + 32, 3, 16);
  __hwasan_tag_memory(p + 48, 0, 32);
  __hwasan_tag_memory(p + 80, 4, 16);

  char *q = (char *)__hwasan_tag_pointer(p, 7);
  __hwasan_print_shadow(q + 5, 89 - 5);
  // CHECK:      HWASan shadow map for {{.*}}5 .. {{.*}}9 (pointer tag 7)
  // CHECK-NEXT:   {{.*}}0: 1
  // CHECK-NEXT:   {{.*}}0: 1
  // CHECK-NEXT:   {{.*}}0: 3
  // CHECK-NEXT:   {{.*}}0: 0
  // CHECK-NEXT:   {{.*}}0: 0
  // CHECK-NEXT:   {{.*}}0: 4

  free(alloc);
}