[Msan] Improve the EXPECT_NOT_POISONED() macro to provide the original line number

[kutuzov.viktor.84]

Summary

Once this patch is committed, I will prepare the patch for the rest of the assertion macros.

[eugenis]

Perfect.

lib/msan/tests/msan_test.cc

 
 template<typename T>
 void ExpectPoisonedWithOrigin(const T& t, unsigned origin) {
   EXPECT_NE(-1, __msan_test_shadow((void*)&t, sizeof(t)));
   if (TrackingOrigins())
     EXPECT_EQ(origin, __msan_get_origin((void*)&t));
 }
 
-#define EXPECT_NOT_POISONED(x) ExpectNotPoisoned(x)
+#define EXPECT_NOT_POISONED(x) EXPECT_EQ(true, TestForNotPoisoned((x)))
 
 template<typename T>
-void ExpectNotPoisoned(const T& t) {
-  EXPECT_EQ(-1, __msan_test_shadow((void*)&t, sizeof(t)));
+bool TestForNotPoisoned(const T& t) {
+  return __msan_test_shadow((void*)&t, sizeof(t)) == -1;
 }
 
 static U8 poisoned_array[100];
 template<class T>
 T *GetPoisoned(int i = 0, T val = 0) {
   T *res = (T*)&poisoned_array[i];
   *res = val;
   __msan_poison(&poisoned_array[i], sizeof(T));