68 lines · c
1// RUN: %clang_dfsan -gmlt -DOFFSET=0 -mllvm -dfsan-track-origins=1 %s -o %t && \2// RUN: %run %t >%t.out 2>&13// RUN: FileCheck %s --check-prefix=CHECK0 < %t.out4// 5// RUN: %clang_dfsan -gmlt -DOFFSET=10 -mllvm -dfsan-track-origins=1 %s -o %t && \6// RUN: %run %t >%t.out 2>&17// RUN: FileCheck %s --check-prefix=CHECK10 < %t.out8 9#include <sanitizer/dfsan_interface.h>10 11#include <string.h>12 13int xx[10000];14int yy[10000];15volatile int idx = 30;16 17__attribute__((noinline))18void fn_g(int a, int b) {19 xx[idx] = a; xx[idx + 10] = b;20}21 22__attribute__((noinline))23void fn_f(int a, int b) {24 fn_g(a, b);25}26 27__attribute__((noinline))28void fn_h() {29 memcpy(&yy, &xx, sizeof(xx));30}31 32int main(int argc, char *argv[]) {33 int volatile z1 = 0;34 int volatile z2 = 0;35 dfsan_set_label(8, (void *)&z1, sizeof(z1));36 dfsan_set_label(16, (void *)&z2, sizeof(z2));37 fn_f(z1, z2);38 fn_h();39 dfsan_print_origin_trace(&yy[idx + OFFSET], NULL);40 return 0;41}42 43// CHECK0: Taint value 0x8 {{.*}} origin tracking ()44// CHECK0: Origin value: {{.*}}, Taint value was stored to memory at45// CHECK0: #0 {{.*}} in fn_h.dfsan {{.*}}origin_memcpy.c:[[@LINE-16]]46// CHECK0: #1 {{.*}} in main {{.*}}origin_memcpy.c:[[@LINE-8]]47 48// CHECK0: Origin value: {{.*}}, Taint value was stored to memory at49// CHECK0: #0 {{.*}} in fn_g.dfsan {{.*}}origin_memcpy.c:[[@LINE-30]]50// CHECK0: #1 {{.*}} in fn_f.dfsan {{.*}}origin_memcpy.c:[[@LINE-26]]51// CHECK0: #2 {{.*}} in main {{.*}}origin_memcpy.c:[[@LINE-14]]52 53// CHECK0: Origin value: {{.*}}, Taint value was created at54// CHECK0: #0 {{.*}} in main {{.*}}origin_memcpy.c:[[@LINE-19]]55 56// CHECK10: Taint value 0x10 {{.*}} origin tracking ()57// CHECK10: Origin value: {{.*}}, Taint value was stored to memory at58// CHECK10: #0 {{.*}} in fn_h.dfsan {{.*}}origin_memcpy.c:[[@LINE-29]]59// CHECK10: #1 {{.*}} in main {{.*}}origin_memcpy.c:[[@LINE-21]]60 61// CHECK10: Origin value: {{.*}}, Taint value was stored to memory at62// CHECK10: #0 {{.*}} in fn_g.dfsan {{.*}}origin_memcpy.c:[[@LINE-43]]63// CHECK10: #1 {{.*}} in fn_f.dfsan {{.*}}origin_memcpy.c:[[@LINE-39]]64// CHECK10: #2 {{.*}} in main {{.*}}origin_memcpy.c:[[@LINE-27]]65 66// CHECK10: Origin value: {{.*}}, Taint value was created at67// CHECK10: #0 {{.*}} in main {{.*}}origin_memcpy.c:[[@LINE-31]]68