File: origin_branch.c

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llvm-toolchain-13 1%3A13.0.1-11
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// RUN: %clang_dfsan -gmlt -mllvm -dfsan-track-origins=1 %s -o %t && \
// RUN:     %run %t >%t.out 2>&1
// RUN: FileCheck %s < %t.out
//
// REQUIRES: x86_64-target-arch

#include <sanitizer/dfsan_interface.h>

__attribute__((noinline)) uint64_t foo(uint64_t x, uint64_t y) { return x + y; }

int main(int argc, char *argv[]) {
  uint64_t a = 10;
  uint64_t b = 20;
  dfsan_set_label(8, &a, sizeof(a));
  uint64_t c = foo(a, b);
  for (int i = 0; i < argc; ++i)
    c += foo(c, b);
  dfsan_print_origin_trace(&c, NULL);
}

// CHECK: Taint value 0x8 {{.*}} origin tracking ()
// CHECK: Origin value: {{.*}}, Taint value was stored to memory at
// CHECK: #0 {{.*}} in main {{.*}}origin_branch.c:[[@LINE-6]]

// CHECK: Origin value: {{.*}}, Taint value was stored to memory at
// CHECK: #0 {{.*}} in main {{.*}}origin_branch.c:[[@LINE-11]]

// CHECK: Origin value: {{.*}}, Taint value was created at
// CHECK: #0 {{.*}} in main {{.*}}origin_branch.c:[[@LINE-15]]