llvm-project

1
// RUN: %clang_dfsan -gmlt -mllvm -dfsan-track-origins=1 %s -o %t && \
2
// RUN:     %run %t >%t.out 2>&1
3
// RUN: FileCheck %s < %t.out
4

5
#include <sanitizer/dfsan_interface.h>
6

7
__attribute__((noinline)) uint64_t foo(uint64_t x, uint64_t y) { return x + y; }
8

9
int main(int argc, char *argv[]) {
10
  uint64_t a = 10;
11
  uint64_t b = 20;
12
  dfsan_set_label(8, &a, sizeof(a));
13
  uint64_t c = foo(a, b);
14
  for (int i = 0; i < argc; ++i)
15
    c += foo(c, b);
16
  dfsan_print_origin_trace(&c, NULL);
17
}
18

19
// CHECK: Taint value 0x8 {{.*}} origin tracking ()
20
// CHECK: Origin value: {{.*}}, Taint value was stored to memory at
21
// CHECK: #0 {{.*}} in main {{.*}}origin_branch.c:[[@LINE-6]]
22

23
// CHECK: Origin value: {{.*}}, Taint value was stored to memory at
24
// CHECK: #0 {{.*}} in main {{.*}}origin_branch.c:[[@LINE-11]]
25

26
// CHECK: Origin value: {{.*}}, Taint value was created at
27
// CHECK: #0 {{.*}} in main {{.*}}origin_branch.c:[[@LINE-15]]
28