| // 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 |
| // |
| // Test origin tracking can lost origins at 2-byte load with addr % 4 == 3. |
| |
| #include <sanitizer/dfsan_interface.h> |
| |
| __attribute__((noinline)) uint16_t foo(uint16_t a, uint16_t b) { return a + b; } |
| |
| int main(int argc, char *argv[]) { |
| uint64_t a __attribute__((aligned(4))) = 1; |
| uint32_t b = 10; |
| dfsan_set_label(4, (uint8_t *)&a + 4, sizeof(uint8_t)); |
| uint16_t c = foo(*(uint16_t *)((uint8_t *)&a + 3), b); |
| dfsan_print_origin_trace(&c, "foo"); |
| } |
| |
| // CHECK: Taint value 0x4 {{.*}} origin tracking (foo) |
| // CHECK: Origin value: {{.*}}, Taint value was created at |
| // CHECK: #0 {{.*}} in main {{.*}}origin_ld_lost.c:[[@LINE-6]] |
