commit 88fd720b6799184c8ad61e766a6d37af33ed30ef
author Alex Light <allight@google.com> Fri Jun 30 08:31:59 2017 -0700
committer Alex Light <allight@google.com> Thu Jul 13 09:11:03 2017 -0700
tree 80e49456eafd44b0ad8790be456ae06949fcc506
parent 1cba8d219331e4d6994359e8f9104e5db2c8f8a9

Add Jvmti Suspend/ResumeThread functions

Enable the can_suspend jvmti capability and implement all required
functionality associated with it.

Test: ./test.py --host -j40
Bug: 34415266
Bug: 62821960
Bug: 63579748

Change-Id: I83b92de7f81622e1658114b034918e8295805b6e

runtime/base/mutex.cc

diff --git a/runtime/base/mutex.cc b/runtime/base/mutex.cc
index b0394a5..a472b67 100644
--- a/runtime/base/mutex.cc
+++ b/runtime/base/mutex.cc
@@ -68,6 +68,7 @@
 Mutex* Locks::thread_suspend_count_lock_ = nullptr;
 Mutex* Locks::trace_lock_ = nullptr;
 Mutex* Locks::unexpected_signal_lock_ = nullptr;
+Mutex* Locks::user_code_suspension_lock_ = nullptr;
 Uninterruptible Roles::uninterruptible_;
 ReaderWriterMutex* Locks::jni_globals_lock_ = nullptr;
 Mutex* Locks::jni_weak_globals_lock_ = nullptr;
@@ -1029,6 +1030,7 @@
     DCHECK(thread_suspend_count_lock_ != nullptr);
     DCHECK(trace_lock_ != nullptr);
     DCHECK(unexpected_signal_lock_ != nullptr);
+    DCHECK(user_code_suspension_lock_ != nullptr);
     DCHECK(dex_lock_ != nullptr);
   } else {
     // Create global locks in level order from highest lock level to lowest.
@@ -1045,6 +1047,10 @@
       } \
       current_lock_level = new_level;
 
+    UPDATE_CURRENT_LOCK_LEVEL(kUserCodeSuspensionLock);
+    DCHECK(user_code_suspension_lock_ == nullptr);
+    user_code_suspension_lock_ = new Mutex("user code suspension lock", current_lock_level);
+
     UPDATE_CURRENT_LOCK_LEVEL(kMutatorLock);
     DCHECK(mutator_lock_ == nullptr);
     mutator_lock_ = new MutatorMutex("mutator lock", current_lock_level);