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1// Checks the ASan memory address type debugging API, makes sure it returns2// the correct memory type for heap, stack, global and shadow addresses and3// that it correctly finds out which region (and name and size) the address4// belongs to.5// RUN: %clangxx_asan -O0 %s -o %t && %run %t 2>&16// UNSUPPORTED: msvc7#include <assert.h>8#include <sanitizer/asan_interface.h>9#include <stdio.h>10#include <stdlib.h>11#include <string.h>12 13int global_var;14 15int main() {16  int local_var;17  char *heap_ptr = (char *)malloc(10);18 19  char name[100];20  void *region_address;21  size_t region_size;22  const char *type;23 24  type = __asan_locate_address(&global_var, name, 100,25                               &region_address, &region_size);26  assert(nullptr != strstr(name, "global_var"));27  assert(0 == strcmp(type, "global"));28  assert(region_address == &global_var);29  assert(region_size == sizeof(global_var));30 31  type = __asan_locate_address((char *)(&global_var)+1, name, 100,32                               &region_address, &region_size);33  assert(nullptr != strstr(name, "global_var"));34  assert(0 == strcmp(type, "global"));35  assert(region_address == &global_var);36  assert(region_size == sizeof(global_var));37 38  type = __asan_locate_address(&local_var, name, 100,39                               &region_address, &region_size);40  assert(0 == strcmp(name, "local_var"));41  assert(0 == strcmp(type, "stack"));42  assert(region_address == &local_var);43  assert(region_size == sizeof(local_var));44 45  type = __asan_locate_address((char *)(&local_var)+1, name, 100,46                               &region_address, &region_size);47  assert(0 == strcmp(name, "local_var"));48  assert(0 == strcmp(type, "stack"));49  assert(region_address == &local_var);50  assert(region_size == sizeof(local_var));51 52  type = __asan_locate_address(heap_ptr, name, 100,53                               &region_address, &region_size);54  assert(0 == strcmp(type, "heap"));55  assert(region_address == heap_ptr);56  assert(10 == region_size);57 58  type = __asan_locate_address(heap_ptr+1, name, 100,59                               &region_address, &region_size);60  assert(0 == strcmp(type, "heap"));61  assert(region_address == heap_ptr);62  assert(10 == region_size);63 64  size_t shadow_scale;65  size_t shadow_offset;66  __asan_get_shadow_mapping(&shadow_scale, &shadow_offset);67 68  uintptr_t shadow_ptr = (((uintptr_t)heap_ptr) >> shadow_scale)69                         + shadow_offset;70  type = __asan_locate_address((void *)shadow_ptr, NULL, 0, NULL, NULL);71  assert((0 == strcmp(type, "high shadow")) || 0 == strcmp(type, "low shadow"));72 73  uintptr_t shadow_gap = (shadow_ptr >> shadow_scale) + shadow_offset;74  type = __asan_locate_address((void *)shadow_gap, NULL, 0, NULL, NULL);75  assert(0 == strcmp(type, "shadow gap"));76 77  free(heap_ptr);78 79  return 0;80}81