forked from OSchip/llvm-project
49 lines
1.5 KiB
C++
49 lines
1.5 KiB
C++
// __NO_INLINE__ is defined so bsearch needs interceptor.
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// RUN: %clangxx_msan -O0 -g %s -o %t && %run %t
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// RUN: %clangxx_msan -DPOISON_DATA -O0 -g %s -o %t && not %run %t 2>&1 | FileCheck %s
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// RUN: %clangxx_msan -DPOISON_KEY -O0 -g %s -o %t && not %run %t 2>&1 | FileCheck %s
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// __NO_INLINE__ is undefined so bsearch should be inlined and instrumented and still work as expected.
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// RUN: %clangxx_msan -O2 -g %s -o %t && %run %t
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// RUN: %clangxx_msan -DPOISON_DATA -O2 -g %s -o %t && not %run %t 2>&1 | FileCheck %s
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// RUN: %clangxx_msan -DPOISON_KEY -O2 -g %s -o %t && not %run %t 2>&1 | FileCheck %s
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#include <assert.h>
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#include <stdlib.h>
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#include <sanitizer/msan_interface.h>
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long z;
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__attribute__((noinline, optnone)) void
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poison_msan_param_tls(long a, long b, long c, long d, long e, long f) {
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z = a + b + c + d + e + f;
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}
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static int compar(const void *a, const void *b) {
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int r = *(const long *)a - *(const long *)b;
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long x;
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__msan_poison(&x, sizeof(x));
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poison_msan_param_tls(x, x, x, x, x, x);
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return r;
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}
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int main(int argc, char *argv[]) {
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constexpr size_t SZ = 27;
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long p[SZ + 1];
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for (int i = 0; i < SZ + 1; ++i)
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p[i] = i;
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p[SZ] = SZ / 3;
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#if defined(POISON_DATA)
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__msan_poison(p, sizeof(long) * SZ / 2);
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#elif defined(POISON_KEY)
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__msan_poison(p + SZ, sizeof(long));
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#endif
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const long *r = (const long *)bsearch(p + SZ, p, SZ, sizeof(long), compar);
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// CHECK: MemorySanitizer: use-of-uninitialized-value
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assert(r == p + SZ / 3);
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return 0;
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}
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