| 1 | // RUN: %clangxx_asan -O0 %s -o %t && not %run %t 2>&1 | FileCheck %s |
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| 2 | |
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| 3 | #include <sanitizer/asan_interface.h> |
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| 4 | #include <stdio.h> |
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| 5 | #include <stdlib.h> |
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| 6 | |
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| 7 | // If we use %p with MS CRTs, it comes out all upper case. Use %08x to get |
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| 8 | // lowercase hex. |
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| 9 | #ifdef _WIN32 |
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| 10 | # ifdef _WIN64 |
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| 11 | # define PTR_FMT "0x%08llx" |
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| 12 | # else |
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| 13 | # define PTR_FMT "0x%08x" |
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| 14 | # endif |
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| 15 | // Solaris libc omits the leading 0x. |
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| 16 | #elif defined(__sun__) && defined(__svr4__) |
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| 17 | # define PTR_FMT "0x%p" |
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| 18 | #else |
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| 19 | # define PTR_FMT "%p" |
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| 20 | #endif |
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| 21 | |
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| 22 | char *heap_ptr; |
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| 23 | |
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| 24 | int main() { |
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| 25 | // Disable stderr buffering. Needed on Windows. |
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| 26 | setvbuf(stderr, NULL, _IONBF, n: 0); |
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| 27 | |
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| 28 | heap_ptr = (char *)malloc(size: 10); |
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| 29 | fprintf(stderr, format: "heap_ptr: " PTR_FMT "\n" , heap_ptr); |
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| 30 | // CHECK: heap_ptr: 0x[[ADDR:[0-9a-f]+]] |
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| 31 | |
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| 32 | free(ptr: heap_ptr); |
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| 33 | free(ptr: heap_ptr); // BOOM |
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| 34 | return 0; |
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| 35 | } |
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| 36 | |
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| 37 | // Required for dyld macOS 12.0+ |
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| 38 | #if (__APPLE__) |
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| 39 | __attribute__((weak)) |
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| 40 | #endif |
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| 41 | extern "C" void |
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| 42 | __asan_on_error() { |
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| 43 | int present = __asan_report_present(); |
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| 44 | void *addr = __asan_get_report_address(); |
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| 45 | const char *description = __asan_get_report_description(); |
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| 46 | |
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| 47 | fprintf(stderr, format: "%s\n" , (present == 1) ? "report present" : "" ); |
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| 48 | // CHECK: report present |
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| 49 | fprintf(stderr, format: "addr: " PTR_FMT "\n" , addr); |
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| 50 | // CHECK: addr: {{0x0*}}[[ADDR]] |
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| 51 | fprintf(stderr, format: "description: %s\n" , description); |
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| 52 | // CHECK: description: double-free |
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| 53 | } |
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| 54 | |
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| 55 | // CHECK: AddressSanitizer: attempting double-free on {{0x0*}}[[ADDR]] in thread T0 |
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| 56 | |
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