[PATCH] D21896: [compiler-rt] Fix broken (flaky) unittests based on FlagParser.
Etienne Bergeron via llvm-commits
llvm-commits at lists.llvm.org
Thu Jun 30 08:03:37 PDT 2016
etienneb created this revision.
etienneb added a reviewer: rnk.
etienneb added subscribers: chrisha, wang0109, llvm-commits.
Herald added a subscriber: kubabrecka.
The FlagParser is populating a static global class with the
unrecognized flags when parsing. That global class has a
dcheck that limit the number of unrecognized flag to 20.
```
class UnknownFlags {
static const int kMaxUnknownFlags = 20;
const char *unknown_flags_[kMaxUnknownFlags];
int n_unknown_flags_;
[...]
void Report() {
if (!n_unknown_flags_) return;
Printf("WARNING: found %d unrecognized flag(s):\n", n_unknown_flags_);
for (int i = 0; i < n_unknown_flags_; ++i)
Printf(" %s\n", unknown_flags_[i]);
n_unknown_flags_ = 0;
}
};
UnknownFlags unknown_flags;
```
Unittests based on that class must reset the counter 'n_unknown_flags_' or
the next usage of that class may fail arbitrary. This can be done by
reporting the pending unknown flags.
http://reviews.llvm.org/D21896
Files:
lib/sanitizer_common/tests/sanitizer_flags_test.cc
Index: lib/sanitizer_common/tests/sanitizer_flags_test.cc
===================================================================
--- lib/sanitizer_common/tests/sanitizer_flags_test.cc
+++ lib/sanitizer_common/tests/sanitizer_flags_test.cc
@@ -47,6 +47,9 @@
parser.ParseString(env);
EXPECT_EQ(0, internal_strcmp(final_value, flag));
+
+ // Reporting unrecognized flags is needed to reset them.
+ ReportUnrecognizedFlags();
}
TEST(SanitizerCommon, BooleanFlags) {
@@ -97,6 +100,9 @@
EXPECT_EQ(expected_flag1, flag1);
EXPECT_EQ(0, internal_strcmp(flag2, expected_flag2));
+
+ // Reporting unrecognized flags is needed to reset them.
+ ReportUnrecognizedFlags();
}
TEST(SanitizerCommon, MultipleFlags) {
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