src/libcompiler_builtins/compiler-rt/test/msan/stack-origin2.cc

   1 // Test that on the second entry to a function the origins are still right.
   2
   3 // RUN: %clangxx_msan -O0 %s -o %t && not %run %t >%t.out 2>&1
   4 // RUN: FileCheck %s < %t.out
   5 // RUN: %clangxx_msan -O1 %s -o %t && not %run %t >%t.out 2>&1
   6 // RUN: FileCheck %s < %t.out
   7 // RUN: %clangxx_msan -O2 %s -o %t && not %run %t >%t.out 2>&1
   8 // RUN: FileCheck %s < %t.out
   9 // RUN: %clangxx_msan -O3 %s -o %t && not %run %t >%t.out 2>&1
  10 // RUN: FileCheck %s < %t.out
  11
  12 // RUN: %clangxx_msan -fsanitize-memory-track-origins -O0 %s -o %t && not %run %t >%t.out 2>&1
  13 // RUN: FileCheck %s < %t.out && FileCheck %s --check-prefix=CHECK-ORIGINS < %t.out
  14 // RUN: %clangxx_msan -fsanitize-memory-track-origins -O1 %s -o %t && not %run %t >%t.out 2>&1
  15 // RUN: FileCheck %s < %t.out && FileCheck %s --check-prefix=CHECK-ORIGINS < %t.out
  16 // RUN: %clangxx_msan -fsanitize-memory-track-origins -O2 %s -o %t && not %run %t >%t.out 2>&1
  17 // RUN: FileCheck %s < %t.out && FileCheck %s --check-prefix=CHECK-ORIGINS < %t.out
  18 // RUN: %clangxx_msan -fsanitize-memory-track-origins -O3 %s -o %t && not %run %t >%t.out 2>&1
  19 // RUN: FileCheck %s < %t.out && FileCheck %s --check-prefix=CHECK-ORIGINS < %t.out
  20
  21 #include <stdlib.h>
  22
  23 extern "C"
  24 int f(int depth) {
  25   if (depth) return f(depth - 1);
  26
  27   int x;
  28   int *volatile p = &x;
  29   return *p;
  30 }
  31
  32 int main(int argc, char **argv) {
  33   return f(1);
  34   // CHECK: WARNING: MemorySanitizer: use-of-uninitialized-value
  35   // CHECK: {{#0 0x.* in main .*stack-origin2.cc:}}[[@LINE-2]]
  36
  37   // CHECK-ORIGINS: Uninitialized value was created by an allocation of 'x' in the stack frame of function 'f'
  38   // CHECK-ORIGINS: {{#0 0x.* in f .*stack-origin2.cc:}}[[@LINE-14]]
  39
  40   // CHECK: SUMMARY: MemorySanitizer: use-of-uninitialized-value {{.*stack-origin2.cc:.* main}}
  41 }