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Make the Android TSD workaround more reliable. 

By scanning the thread list backwards.

llvm-svn: 148476
This commit is contained in:
Evgeniy Stepanov 2012-01-19 13:57:45 +00:00
parent d296ad4e16
commit 3f6840745c
1 changed files with 4 additions and 1 deletions
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5
compiler-rt/lib/asan/asan_thread_registry.cc
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@ -136,7 +136,10 @@ AsanThreadSummary *AsanThreadRegistry::FindByTid(int tid) {
AsanThread *AsanThreadRegistry::FindThreadByStackAddress(uintptr_t addr) {
ScopedLock lock(&mu_);
for (int tid = 0; tid < n_threads_; tid++) {
// Main thread (tid = 0) stack limits are pretty much guessed; for the other
// threads we ask libpthread, so their limits must be correct.
// Scanning the thread list backwards makes this function more reliable.
for (int tid = n_threads_ - 1; tid >= 0; tid--) {
AsanThread *t = thread_summaries_[tid]->thread();
if (!t) continue;
if (t->fake_stack().AddrIsInFakeStack(addr) || t->AddrIsInStack(addr)) {