forked from OSchip/llvm-project
37 lines
1.1 KiB
C
37 lines
1.1 KiB
C
// Tests free_checks_tail_magic=1.
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// RUN: %clang_hwasan %s -o %t
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// RUN: %env_hwasan_opts=free_checks_tail_magic=0 %run %t
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// RUN: %env_hwasan_opts=free_checks_tail_magic=1 not %run %t 2>&1 | FileCheck %s
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// RUN: not %run %t 2>&1 | FileCheck %s
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// REQUIRES: stable-runtime
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#include <stdlib.h>
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#include <stdio.h>
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#include <sanitizer/hwasan_interface.h>
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#include "utils.h"
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static volatile char *sink;
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// Overwrite the tail in a non-hwasan function so that we don't detect the
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// stores as OOB.
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__attribute__((no_sanitize("hwaddress"))) void overwrite_tail() {
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(*UNTAG(&sink))[20] = 0x42;
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(*UNTAG(&sink))[24] = 0x66;
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}
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int main(int argc, char **argv) {
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__hwasan_enable_allocator_tagging();
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char *p = (char*)malloc(20);
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sink = UNTAG(p);
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overwrite_tail();
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free(p);
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// CHECK: ERROR: HWAddressSanitizer: allocation-tail-overwritten; heap object [{{.*}}) of size 20
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// CHECK: in main {{.*}}tail-magic.c:[[@LINE-2]]
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// CHECK: allocated here:
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// CHECK: in main {{.*}}tail-magic.c:[[@LINE-7]]
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// CHECK: Tail contains: .. .. .. .. 42 {{.. .. ..}} 66
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}
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