compiler-rt/test/dfsan/origin_memset.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 // REQUIRES: x86_64-target-arch
  10
  11 #include <sanitizer/dfsan_interface.h>
  12
  13 #include <string.h>
  14
  15 int xx[10000];
  16
  17 volatile int idx = 30;
  18
  19 __attribute__((noinline))
  20 void fn_g(int a, int b) {
  21   memset(&xx[idx], a, sizeof(a));
  22   memset(&xx[idx + 10], b, sizeof(b));
  23 }
  24
  25 __attribute__((noinline))
  26 void fn_f(int a, int b) {
  27   fn_g(a, b);
  28 }
  29
  30 int main(int argc, char *argv[]) {
  31   int volatile z1;
  32   int volatile z2;
  33   dfsan_set_label(8, (void *)&z1, sizeof(z1));
  34   dfsan_set_label(16, (void *)&z2, sizeof(z2));
  35   fn_f(z1, z2);
  36   dfsan_print_origin_trace(&xx[idx + OFFSET], NULL);
  37   return 0;
  38 }
  39
  40 // CHECK0: Taint value 0x8 {{.*}} origin tracking ()
  41 // CHECK0: Origin value: {{.*}}, Taint value was created at
  42
  43 // CHECK0: #0 {{.*}} in main {{.*}}origin_memset.c:[[@LINE-10]]
  44
  45 // CHECK10: Taint value 0x10 {{.*}} origin tracking ()
  46 // CHECK10: Origin value: {{.*}}, Taint value was created at
  47
  48 // CHECK10: #0 {{.*}} in main {{.*}}origin_memset.c:[[@LINE-14]]