diff options
Diffstat (limited to 'third_party/tcmalloc/chromium/src/thread_cache.cc')
| -rw-r--r-- | third_party/tcmalloc/chromium/src/thread_cache.cc | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/third_party/tcmalloc/chromium/src/thread_cache.cc b/third_party/tcmalloc/chromium/src/thread_cache.cc index 64f4deb..fd44a70 100644 --- a/third_party/tcmalloc/chromium/src/thread_cache.cc +++ b/third_party/tcmalloc/chromium/src/thread_cache.cc @@ -299,6 +299,12 @@ int ThreadCache::GetSamplePeriod() { } void ThreadCache::InitModule() { + // There is a slight potential race here because of double-checked + // locking idiom. However, as long as the program does a small + // allocation before switching to multi-threaded mode, we will be + // fine. We increase the chances of doing such a small allocation + // by doing one in the constructor of the module_enter_exit_hook + // object declared below. SpinLockHolder h(Static::pageheap_lock()); if (!phinited) { Static::InitStaticVars(); |