39 lines
851 B
C
39 lines
851 B
C
// Test that custom memmove implementations instrumented by HWASan do not cause
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// false positives.
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// RUN: %clang_hwasan %s -o %t
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// RUN: %run %t
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#include <assert.h>
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#include <sanitizer/hwasan_interface.h>
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#include <stdlib.h>
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void *memmove(void *Dest, const void *Src, size_t N) {
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char *Tmp = (char *)malloc(N);
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char *D = (char *)Dest;
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const char *S = (const char *)Src;
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for (size_t I = 0; I < N; ++I)
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Tmp[I] = S[I];
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for (size_t I = 0; I < N; ++I)
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D[I] = Tmp[I];
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free(Tmp);
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return Dest;
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}
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int main() {
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__hwasan_enable_allocator_tagging();
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const size_t BufSize = 64;
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char *Buf = (char *)malloc(BufSize);
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for (size_t I = 0; I < BufSize; ++I)
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Buf[I] = I;
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memmove(Buf + BufSize / 2, Buf, BufSize / 2);
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for (size_t I = 0; I < BufSize; ++I)
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assert(Buf[I] == I % (BufSize / 2));
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free(Buf);
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return 0;
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}
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