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// RUN: %clangxx_asan -O0 %s -o %t 2>&1
// RUN: not %t 2>&1 | FileCheck %s --check-prefix=CHECK --check-prefix=MALLOC-CTX
// Also works if no malloc context is available.
// RUN: ASAN_OPTIONS=malloc_context_size=0:fast_unwind_on_malloc=0 not %t 2>&1 | FileCheck %s
// RUN: ASAN_OPTIONS=malloc_context_size=0:fast_unwind_on_malloc=1 not %t 2>&1 | FileCheck %s
#include <stdlib.h>
#include <string.h>
int main(int argc, char **argv) {
char *x = (char*)malloc(10 * sizeof(char));
memset(x, 0, 10);
int res = x[argc];
free(x);
free(x + argc - 1); // BOOM
// CHECK: AddressSanitizer: attempting double-free{{.*}}in thread T0
// CHECK: #0 0x{{.*}} in {{.*}}free
// CHECK: #1 0x{{.*}} in main {{.*}}double-free.cc:[[@LINE-3]]
// CHECK: freed by thread T0 here:
// MALLOC-CTX: #0 0x{{.*}} in {{.*}}free
// MALLOC-CTX: #1 0x{{.*}} in main {{.*}}double-free.cc:[[@LINE-7]]
// CHECK: allocated by thread T0 here:
// MALLOC-CTX: double-free.cc:[[@LINE-12]]
return res;
}
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