ART: Move openjdkjvmti to art/

Move libopenjdkjvmti out of the runtime directory. Let's not
pollute the runtime library.

Test: m test-art-host
Change-Id: Idb6b9cebcd61777bd3200437a2ae584a63a4a341

1 files changed, 116 insertions, 0 deletions

diff --git a/openjdkjvmti/ti_thread.h b/openjdkjvmti/ti_thread.h
new file mode 100644
index 0000000000..03c49d7788
--- /dev/null
+++ b/openjdkjvmti/ti_thread.h
@@ -0,0 +1,116 @@
+/* Copyright (C) 2017 The Android Open Source Project
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This file implements interfaces from the file jvmti.h. This implementation
+ * is licensed under the same terms as the file jvmti.h.  The
+ * copyright and license information for the file jvmti.h follows.
+ *
+ * Copyright (c) 2003, 2011, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+#ifndef ART_OPENJDKJVMTI_TI_THREAD_H_
+#define ART_OPENJDKJVMTI_TI_THREAD_H_
+
+#include "jni.h"
+#include "jvmti.h"
+
+#include "base/macros.h"
+#include "base/mutex.h"
+
+namespace art {
+class ArtField;
+class ScopedObjectAccessAlreadyRunnable;
+class Thread;
+}  // namespace art
+
+namespace openjdkjvmti {
+
+class EventHandler;
+
+class ThreadUtil {
+ public:
+  static void Register(EventHandler* event_handler);
+  static void Unregister();
+
+  // To be called when it is safe to cache data.
+  static void CacheData();
+
+  // Handle a jvmtiEnv going away.
+  static void RemoveEnvironment(jvmtiEnv* env);
+
+  static jvmtiError GetAllThreads(jvmtiEnv* env, jint* threads_count_ptr, jthread** threads_ptr);
+
+  static jvmtiError GetCurrentThread(jvmtiEnv* env, jthread* thread_ptr);
+
+  static jvmtiError GetThreadInfo(jvmtiEnv* env, jthread thread, jvmtiThreadInfo* info_ptr);
+
+  static jvmtiError GetThreadState(jvmtiEnv* env, jthread thread, jint* thread_state_ptr);
+
+  static jvmtiError SetThreadLocalStorage(jvmtiEnv* env, jthread thread, const void* data);
+  static jvmtiError GetThreadLocalStorage(jvmtiEnv* env, jthread thread, void** data_ptr);
+
+  static jvmtiError RunAgentThread(jvmtiEnv* env,
+                                   jthread thread,
+                                   jvmtiStartFunction proc,
+                                   const void* arg,
+                                   jint priority);
+
+  static jvmtiError SuspendThread(jvmtiEnv* env, jthread thread);
+  static jvmtiError ResumeThread(jvmtiEnv* env, jthread thread);
+
+  static jvmtiError SuspendThreadList(jvmtiEnv* env,
+                                      jint request_count,
+                                      const jthread* threads,
+                                      jvmtiError* results);
+  static jvmtiError ResumeThreadList(jvmtiEnv* env,
+                                     jint request_count,
+                                     const jthread* threads,
+                                     jvmtiError* results);
+
+  static art::Thread* GetNativeThread(jthread thread,
+                                      const art::ScopedObjectAccessAlreadyRunnable& soa)
+      REQUIRES_SHARED(art::Locks::mutator_lock_)
+      REQUIRES(art::Locks::thread_list_lock_);
+
+ private:
+  // We need to make sure only one thread tries to suspend threads at a time so we can get the
+  // 'suspend-only-once' behavior the spec requires. Internally, ART considers suspension to be a
+  // counted state, allowing a single thread to be suspended multiple times by different users. This
+  // makes mapping into the JVMTI idea of thread suspension difficult. We have decided to split the
+  // difference and ensure that JVMTI tries to treat suspension as the boolean flag as much as
+  // possible with the suspend/resume methods but only do best effort. On the other hand
+  // GetThreadState will be totally accurate as much as possible. This means that calling
+  // ResumeThread on a thread that has state JVMTI_THREAD_STATE_SUSPENDED will not necessarily
+  // cause the thread to wake up if the thread is suspended for the debugger or gc or something.
+  static jvmtiError SuspendSelf(art::Thread* self)
+      REQUIRES(!art::Locks::mutator_lock_, !art::Locks::user_code_suspension_lock_);
+  static jvmtiError SuspendOther(art::Thread* self, jthread target_jthread)
+      REQUIRES(!art::Locks::mutator_lock_, !art::Locks::user_code_suspension_lock_);
+
+  static art::ArtField* context_class_loader_;
+};
+
+}  // namespace openjdkjvmti
+
+#endif  // ART_OPENJDKJVMTI_TI_THREAD_H_