[PATCH] Switch ASan to use ThreadRegistry from sanitizer_common.

[Kostya Serebryany]

================
Comment at: lib/asan/asan_interceptors.cc:136
@@ +135,3 @@
+  int detached = 0;
+  pthread_attr_getdetachstate(attr, &detached);
+
----------------
you can call pthread_attr_getdetachstate only iff the original attr != 0
then you don't need myattr

================
Comment at: lib/asan/asan_report.cc:451
@@ +450,3 @@
+    // recursive reports.
+    ThreadRegistryLock *lock = new(registry_lock_placeholder)
+        ThreadRegistryLock(&asanThreadRegistry());
----------------
OMFG!!
Can you add sanThreadRegistry()->LockAndNeverUnlock() ? 


http://llvm-reviews.chandlerc.com/D555