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81 lines
2.7 KiB
81 lines
2.7 KiB
// Checks the ASan memory address type debugging API, makes sure it returns
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// the correct memory type for heap, stack, global and shadow addresses and
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// that it correctly finds out which region (and name and size) the address
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// belongs to.
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// RUN: %clangxx_asan -O0 %s -o %t && %run %t 2>&1
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#include <assert.h>
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#include <sanitizer/asan_interface.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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int global_var;
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int main() {
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int local_var;
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char *heap_ptr = (char *)malloc(10);
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char name[100];
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void *region_address;
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size_t region_size;
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const char *type;
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type = __asan_locate_address(&global_var, name, 100,
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®ion_address, ®ion_size);
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assert(0 == strcmp(name, "global_var"));
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assert(0 == strcmp(type, "global"));
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assert(region_address == &global_var);
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assert(region_size == sizeof(global_var));
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type = __asan_locate_address((char *)(&global_var)+1, name, 100,
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®ion_address, ®ion_size);
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assert(0 == strcmp(name, "global_var"));
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assert(0 == strcmp(type, "global"));
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assert(region_address == &global_var);
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assert(region_size == sizeof(global_var));
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type = __asan_locate_address(&local_var, name, 100,
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®ion_address, ®ion_size);
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assert(0 == strcmp(name, "local_var"));
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assert(0 == strcmp(type, "stack"));
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assert(region_address == &local_var);
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assert(region_size == sizeof(local_var));
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type = __asan_locate_address((char *)(&local_var)+1, name, 100,
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®ion_address, ®ion_size);
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assert(0 == strcmp(name, "local_var"));
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assert(0 == strcmp(type, "stack"));
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assert(region_address == &local_var);
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assert(region_size == sizeof(local_var));
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type = __asan_locate_address(heap_ptr, name, 100,
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®ion_address, ®ion_size);
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assert(0 == strcmp(type, "heap"));
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assert(region_address == heap_ptr);
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assert(10 == region_size);
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type = __asan_locate_address(heap_ptr+1, name, 100,
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®ion_address, ®ion_size);
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assert(0 == strcmp(type, "heap"));
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assert(region_address == heap_ptr);
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assert(10 == region_size);
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size_t shadow_scale;
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size_t shadow_offset;
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__asan_get_shadow_mapping(&shadow_scale, &shadow_offset);
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uintptr_t shadow_ptr = (((uintptr_t)heap_ptr) >> shadow_scale)
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+ shadow_offset;
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type = __asan_locate_address((void *)shadow_ptr, NULL, 0, NULL, NULL);
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assert((0 == strcmp(type, "high shadow")) || 0 == strcmp(type, "low shadow"));
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uintptr_t shadow_gap = (shadow_ptr >> shadow_scale) + shadow_offset;
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type = __asan_locate_address((void *)shadow_gap, NULL, 0, NULL, NULL);
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assert(0 == strcmp(type, "shadow gap"));
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free(heap_ptr);
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return 0;
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}
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