| 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 | // Windows does not have execinfo.h. For now, be conservative and |
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| 4 | // restrict the test to glibc. |
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| 5 | // REQUIRES: glibc-2.27 |
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| 6 | |
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| 7 | // Test the backtrace_symbols() interceptor. |
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| 8 | |
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| 9 | #include <assert.h> |
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| 10 | #include <execinfo.h> |
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| 11 | #include <math.h> |
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| 12 | #include <stdio.h> |
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| 13 | #include <stdlib.h> |
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| 14 | |
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| 15 | #define MAX_BT 100 |
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| 16 | |
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| 17 | int main() { |
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| 18 | void **buffer = (void **)malloc(size: sizeof(void *) * MAX_BT); |
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| 19 | assert(buffer != NULL); |
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| 20 | |
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| 21 | int numEntries = backtrace(array: buffer, MAX_BT); |
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| 22 | printf(format: "backtrace returned %d entries\n" , numEntries); |
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| 23 | |
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| 24 | free(ptr: buffer); |
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| 25 | |
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| 26 | // Deliberate use-after-free of 'buffer'. We expect ASan to |
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| 27 | // catch this, without triggering internal sanitizer errors. |
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| 28 | char **strings = backtrace_symbols(array: buffer, size: numEntries); |
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| 29 | assert(strings != NULL); |
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| 30 | |
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| 31 | for (int i = 0; i < numEntries; i++) { |
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| 32 | printf(format: "%s\n" , strings[i]); |
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| 33 | } |
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| 34 | |
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| 35 | free(ptr: strings); |
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| 36 | |
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| 37 | // CHECK: use-after-free |
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| 38 | // CHECK: SUMMARY |
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| 39 | return 0; |
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| 40 | } |
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| 41 | |
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