compiler-rt/test/dfsan/origin_memcpy.c

   1 // RUN: %clang_dfsan -gmlt -DOFFSET=0 -mllvm -dfsan-track-origins=1 %s -o %t && \
   2 // RUN:     %run %t >%t.out 2>&1
   3 // RUN: FileCheck %s --check-prefix=CHECK0 < %t.out
   4 //
   5 // RUN: %clang_dfsan -gmlt -DOFFSET=10 -mllvm -dfsan-track-origins=1 %s -o %t && \
   6 // RUN:     %run %t >%t.out 2>&1
   7 // RUN: FileCheck %s --check-prefix=CHECK10 < %t.out
   8
   9 #include <sanitizer/dfsan_interface.h>
  10
  11 #include <string.h>
  12
  13 int xx[10000];
  14 int yy[10000];
  15 volatile int idx = 30;
  16
  17 __attribute__((noinline))
  18 void fn_g(int a, int b) {
  19   xx[idx] = a; xx[idx + 10] = b;
  20 }
  21
  22 __attribute__((noinline))
  23 void fn_f(int a, int b) {
  24   fn_g(a, b);
  25 }
  26
  27 __attribute__((noinline))
  28 void fn_h() {
  29   memcpy(&yy, &xx, sizeof(xx));
  30 }
  31
  32 int 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 at
  45 // 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 at
  49 // 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 at
  54 // 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 at
  58 // 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 at
  62 // 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 at
  67 // CHECK10: #0 {{.*}} in main {{.*}}origin_memcpy.c:[[@LINE-31]]