commit 00f7d0eaa6bd93d33bf0c1429bf4ba0b3f28abac
author Ian Rogers <irogers@google.com> Thu Jul 19 15:28:27 2012 -0700
committer Ian Rogers <irogers@google.com> Tue Aug 14 10:45:52 2012 -0700
tree 6a2172ece15c4699e6c2a67ce76f019db0a9a21d
parent 634ea28f78c4a138e6a1de54eae8696095422415

Global lock levels.

Introduce the notion of the mutators/GC being a shared-exclusive (aka
reader-writer) lock. Introduce globally ordered locks, analysable by
annotalysis, statically at compile time. Add locking attributes to
methods.

More subtly, remove the heap_lock_ and split between various locks that
are held for smaller periods (where work doesn't get blocked). Remove
buggy Dalvik style thread transitions. Make GC use CMS in all cases when
concurrent is enabled. Fix bug where suspend counts rather than debug
suspend counts were sent to JDWP. Move the PathClassLoader to
WellKnownClasses. In debugger refactor calls to send request and
possibly suspend. Break apart different VmWait thread states. Move
identity hash code to a shared method.

Change-Id: Icdbfc3ce3fcccd14341860ac7305d8e97b51f5c6

src/intern_table.h

diff --git a/src/intern_table.h b/src/intern_table.h
index 04c75d0..0d9e097 100644
--- a/src/intern_table.h
+++ b/src/intern_table.h
@@ -41,24 +41,27 @@
   InternTable();
 
   // Interns a potentially new string in the 'strong' table. (See above.)
-  String* InternStrong(int32_t utf16_length, const char* utf8_data);
+  String* InternStrong(int32_t utf16_length, const char* utf8_data)
+      SHARED_LOCKS_REQUIRED(GlobalSynchronization::mutator_lock_);
 
   // Interns a potentially new string in the 'strong' table. (See above.)
-  String* InternStrong(const char* utf8_data);
+  String* InternStrong(const char* utf8_data)
+      SHARED_LOCKS_REQUIRED(GlobalSynchronization::mutator_lock_);
 
   // Interns a potentially new string in the 'strong' table. (See above.)
-  String* InternStrong(String* s);
+  String* InternStrong(String* s) SHARED_LOCKS_REQUIRED(GlobalSynchronization::mutator_lock_);
 
   // Interns a potentially new string in the 'weak' table. (See above.)
-  String* InternWeak(String* s);
+  String* InternWeak(String* s) SHARED_LOCKS_REQUIRED(GlobalSynchronization::mutator_lock_);
 
   // Register a String trusting that it is safe to intern.
   // Used when reinitializing InternTable from an image.
-  void RegisterStrong(String* s);
+  void RegisterStrong(String* s) SHARED_LOCKS_REQUIRED(GlobalSynchronization::mutator_lock_);
 
-  void SweepInternTableWeaks(Heap::IsMarkedTester is_marked, void* arg);
+  void SweepInternTableWeaks(Heap::IsMarkedTester is_marked, void* arg)
+      SHARED_LOCKS_REQUIRED(GlobalSynchronization::heap_bitmap_lock_);
 
-  bool ContainsWeak(String* s);
+  bool ContainsWeak(String* s) SHARED_LOCKS_REQUIRED(GlobalSynchronization::mutator_lock_);
 
   size_t Size() const;
 
@@ -69,9 +72,11 @@
  private:
   typedef std::multimap<int32_t, String*> Table;
 
-  String* Insert(String* s, bool is_strong);
+  String* Insert(String* s, bool is_strong)
+      SHARED_LOCKS_REQUIRED(GlobalSynchronization::mutator_lock_);
 
-  String* Lookup(Table& table, String* s, uint32_t hash_code);
+  String* Lookup(Table& table, String* s, uint32_t hash_code)
+      SHARED_LOCKS_REQUIRED(GlobalSynchronization::mutator_lock_);
   String* Insert(Table& table, String* s, uint32_t hash_code);
   void Remove(Table& table, const String* s, uint32_t hash_code);