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// RUN: %clangxx_asan -O0 %s -o %t && not %run %t 2>&1 | FileCheck %s
// Windows does not have execinfo.h. For now, be conservative and
// restrict the test to glibc.
// REQUIRES: glibc-2.27
// Test the backtrace_symbols() interceptor.
#include <assert.h>
#include <execinfo.h>
#include <math.h>
#include <stdio.h>
#include <stdlib.h>
#define MAX_BT 100
int main() {
void **buffer = (void **)malloc(sizeof(void *) * MAX_BT);
assert(buffer != NULL);
int numEntries = backtrace(buffer, MAX_BT);
printf("backtrace returned %d entries\n", numEntries);
free(buffer);
// Deliberate use-after-free of 'buffer'. We expect ASan to
// catch this, without triggering internal sanitizer errors.
char **strings = backtrace_symbols(buffer, numEntries);
assert(strings != NULL);
for (int i = 0; i < numEntries; i++) {
printf("%s\n", strings[i]);
}
free(strings);
// CHECK: use-after-free
// CHECK: SUMMARY
return 0;
}
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