llvm-project

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// RUN: %clang_dfsan %s -o %t
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// RUN: %run %t
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//
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#include <sanitizer/dfsan_interface.h>
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#include <assert.h>
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#include <stdio.h>
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#include <string.h>
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int foo(int a, int b) {
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  return a + b;
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}
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int main(int argc, char *argv[]) {
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  int a = 10;
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  int b = 20;
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  dfsan_set_label(8, &a, sizeof(a));
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  dfsan_set_label(128, &b, sizeof(b));
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  int c = foo(a, b);
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  printf("A: 0x%x\n", dfsan_get_label(a));
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  printf("B: 0x%x\n", dfsan_get_label(b));
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  dfsan_label l = dfsan_get_label(c);
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  printf("C: 0x%x\n", l);
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  assert(l == 136);  // OR of the other two labels.
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}
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