diff options
| -rw-r--r-- | compiler-rt/lib/asan/asan_thread_registry.cc | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/compiler-rt/lib/asan/asan_thread_registry.cc b/compiler-rt/lib/asan/asan_thread_registry.cc index a47fe61d730..c905201d0a3 100644 --- a/compiler-rt/lib/asan/asan_thread_registry.cc +++ b/compiler-rt/lib/asan/asan_thread_registry.cc @@ -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)) { |
