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Improve ThreadedQuarantineTest heap memory measurements. 

Summary:
Warm up ASAN caches in ThreadedQuarantineTest to get more predictable
incremental heap memory usage measurements.

Reviewers: eugenis

Patch by Alex Shlyapnikov.

Subscribers: aemerson, kubabrecka, llvm-commits

Differential Revision: https://reviews.llvm.org/D28061

llvm-svn: 290371
This commit is contained in:
Evgeniy Stepanov 2016-12-22 21:16:04 +00:00
parent 53ddc1d0f4
commit 055f506c54
1 changed files with 7 additions and 1 deletions
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8
compiler-rt/lib/asan/tests/asan_noinst_test.cc
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@ -170,6 +170,12 @@ void *ThreadedQuarantineTestWorker(void *unused) {
// Check that the thread local allocators are flushed when threads are
// destroyed.
TEST(AddressSanitizer, ThreadedQuarantineTest) {
// Run the routine once to warm up ASAN internal structures to get more
// predictable incremental memory changes.
pthread_t t;
PTHREAD_CREATE(&t, NULL, ThreadedQuarantineTestWorker, 0);
PTHREAD_JOIN(t, 0);
const int n_threads = 3000;
size_t mmaped1 = __sanitizer_get_heap_size();
for (int i = 0; i < n_threads; i++) {
@ -178,7 +184,7 @@ TEST(AddressSanitizer, ThreadedQuarantineTest) {
PTHREAD_JOIN(t, 0);
size_t mmaped2 = __sanitizer_get_heap_size();
// Figure out why this much memory is required.
EXPECT_LT(mmaped2 - mmaped1, 352U * (1 << 20));
EXPECT_LT(mmaped2 - mmaped1, 320U * (1 << 20));
}
}