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
diff --git a/openjdkjvmti/events.h b/openjdkjvmti/events.h
new file mode 100644
index 0000000..3d05fa1
--- /dev/null
+++ b/openjdkjvmti/events.h
@@ -0,0 +1,230 @@
+/*
+ * Copyright (C) 2016 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef ART_OPENJDKJVMTI_EVENTS_H_
+#define ART_OPENJDKJVMTI_EVENTS_H_
+
+#include <bitset>
+#include <vector>
+
+#include "base/logging.h"
+#include "jvmti.h"
+#include "thread.h"
+
+namespace openjdkjvmti {
+
+struct ArtJvmTiEnv;
+class JvmtiAllocationListener;
+class JvmtiGcPauseListener;
+class JvmtiMethodTraceListener;
+
+// an enum for ArtEvents. This differs from the JVMTI events only in that we distinguish between
+// retransformation capable and incapable loading
+enum class ArtJvmtiEvent {
+ kMinEventTypeVal = JVMTI_MIN_EVENT_TYPE_VAL,
+ kVmInit = JVMTI_EVENT_VM_INIT,
+ kVmDeath = JVMTI_EVENT_VM_DEATH,
+ kThreadStart = JVMTI_EVENT_THREAD_START,
+ kThreadEnd = JVMTI_EVENT_THREAD_END,
+ kClassFileLoadHookNonRetransformable = JVMTI_EVENT_CLASS_FILE_LOAD_HOOK,
+ kClassLoad = JVMTI_EVENT_CLASS_LOAD,
+ kClassPrepare = JVMTI_EVENT_CLASS_PREPARE,
+ kVmStart = JVMTI_EVENT_VM_START,
+ kException = JVMTI_EVENT_EXCEPTION,
+ kExceptionCatch = JVMTI_EVENT_EXCEPTION_CATCH,
+ kSingleStep = JVMTI_EVENT_SINGLE_STEP,
+ kFramePop = JVMTI_EVENT_FRAME_POP,
+ kBreakpoint = JVMTI_EVENT_BREAKPOINT,
+ kFieldAccess = JVMTI_EVENT_FIELD_ACCESS,
+ kFieldModification = JVMTI_EVENT_FIELD_MODIFICATION,
+ kMethodEntry = JVMTI_EVENT_METHOD_ENTRY,
+ kMethodExit = JVMTI_EVENT_METHOD_EXIT,
+ kNativeMethodBind = JVMTI_EVENT_NATIVE_METHOD_BIND,
+ kCompiledMethodLoad = JVMTI_EVENT_COMPILED_METHOD_LOAD,
+ kCompiledMethodUnload = JVMTI_EVENT_COMPILED_METHOD_UNLOAD,
+ kDynamicCodeGenerated = JVMTI_EVENT_DYNAMIC_CODE_GENERATED,
+ kDataDumpRequest = JVMTI_EVENT_DATA_DUMP_REQUEST,
+ kMonitorWait = JVMTI_EVENT_MONITOR_WAIT,
+ kMonitorWaited = JVMTI_EVENT_MONITOR_WAITED,
+ kMonitorContendedEnter = JVMTI_EVENT_MONITOR_CONTENDED_ENTER,
+ kMonitorContendedEntered = JVMTI_EVENT_MONITOR_CONTENDED_ENTERED,
+ kResourceExhausted = JVMTI_EVENT_RESOURCE_EXHAUSTED,
+ kGarbageCollectionStart = JVMTI_EVENT_GARBAGE_COLLECTION_START,
+ kGarbageCollectionFinish = JVMTI_EVENT_GARBAGE_COLLECTION_FINISH,
+ kObjectFree = JVMTI_EVENT_OBJECT_FREE,
+ kVmObjectAlloc = JVMTI_EVENT_VM_OBJECT_ALLOC,
+ kClassFileLoadHookRetransformable = JVMTI_MAX_EVENT_TYPE_VAL + 1,
+ kMaxEventTypeVal = kClassFileLoadHookRetransformable,
+};
+
+// Convert a jvmtiEvent into a ArtJvmtiEvent
+ALWAYS_INLINE static inline ArtJvmtiEvent GetArtJvmtiEvent(ArtJvmTiEnv* env, jvmtiEvent e);
+
+static inline jvmtiEvent GetJvmtiEvent(ArtJvmtiEvent e) {
+ if (UNLIKELY(e == ArtJvmtiEvent::kClassFileLoadHookRetransformable)) {
+ return JVMTI_EVENT_CLASS_FILE_LOAD_HOOK;
+ } else {
+ return static_cast<jvmtiEvent>(e);
+ }
+}
+
+struct EventMask {
+ static constexpr size_t kEventsSize =
+ static_cast<size_t>(ArtJvmtiEvent::kMaxEventTypeVal) -
+ static_cast<size_t>(ArtJvmtiEvent::kMinEventTypeVal) + 1;
+ std::bitset<kEventsSize> bit_set;
+
+ static bool EventIsInRange(ArtJvmtiEvent event) {
+ return event >= ArtJvmtiEvent::kMinEventTypeVal && event <= ArtJvmtiEvent::kMaxEventTypeVal;
+ }
+
+ void Set(ArtJvmtiEvent event, bool value = true) {
+ DCHECK(EventIsInRange(event));
+ bit_set.set(static_cast<size_t>(event) - static_cast<size_t>(ArtJvmtiEvent::kMinEventTypeVal),
+ value);
+ }
+
+ bool Test(ArtJvmtiEvent event) const {
+ DCHECK(EventIsInRange(event));
+ return bit_set.test(
+ static_cast<size_t>(event) - static_cast<size_t>(ArtJvmtiEvent::kMinEventTypeVal));
+ }
+};
+
+struct EventMasks {
+ // The globally enabled events.
+ EventMask global_event_mask;
+
+ // The per-thread enabled events.
+
+ // It is not enough to store a Thread pointer, as these may be reused. Use the pointer and the
+ // thread id.
+ // Note: We could just use the tid like tracing does.
+ using UniqueThread = std::pair<art::Thread*, uint32_t>;
+ // TODO: Native thread objects are immovable, so we can use them as keys in an (unordered) map,
+ // if necessary.
+ std::vector<std::pair<UniqueThread, EventMask>> thread_event_masks;
+
+ // A union of the per-thread events, for fast-pathing.
+ EventMask unioned_thread_event_mask;
+
+ EventMask& GetEventMask(art::Thread* thread);
+ EventMask* GetEventMaskOrNull(art::Thread* thread);
+ void EnableEvent(art::Thread* thread, ArtJvmtiEvent event);
+ void DisableEvent(art::Thread* thread, ArtJvmtiEvent event);
+ bool IsEnabledAnywhere(ArtJvmtiEvent event);
+ // Make any changes to event masks needed for the given capability changes. If caps_added is true
+ // then caps is all the newly set capabilities of the jvmtiEnv. If it is false then caps is the
+ // set of all capabilities that were removed from the jvmtiEnv.
+ void HandleChangedCapabilities(const jvmtiCapabilities& caps, bool caps_added);
+};
+
+// Helper class for event handling.
+class EventHandler {
+ public:
+ EventHandler();
+ ~EventHandler();
+
+ // do cleanup for the event handler.
+ void Shutdown();
+
+ // Register an env. It is assumed that this happens on env creation, that is, no events are
+ // enabled, yet.
+ void RegisterArtJvmTiEnv(ArtJvmTiEnv* env);
+
+ // Remove an env.
+ void RemoveArtJvmTiEnv(ArtJvmTiEnv* env);
+
+ bool IsEventEnabledAnywhere(ArtJvmtiEvent event) const {
+ if (!EventMask::EventIsInRange(event)) {
+ return false;
+ }
+ return global_mask.Test(event);
+ }
+
+ jvmtiError SetEvent(ArtJvmTiEnv* env,
+ art::Thread* thread,
+ ArtJvmtiEvent event,
+ jvmtiEventMode mode);
+
+ // Dispatch event to all registered environments.
+ template <ArtJvmtiEvent kEvent, typename ...Args>
+ ALWAYS_INLINE
+ inline void DispatchEvent(art::Thread* thread, Args... args) const;
+ // Dispatch event to all registered environments stashing exceptions as needed. This works since
+ // JNIEnv* is always the second argument if it is passed to an event. Needed since C++ does not
+ // allow partial template function specialization.
+ template <ArtJvmtiEvent kEvent, typename ...Args>
+ ALWAYS_INLINE
+ void DispatchEvent(art::Thread* thread, JNIEnv* jnienv, Args... args) const;
+ // Dispatch event to the given environment, only.
+ template <ArtJvmtiEvent kEvent, typename ...Args>
+ ALWAYS_INLINE
+ inline void DispatchEvent(ArtJvmTiEnv* env, art::Thread* thread, Args... args) const;
+
+ // Tell the event handler capabilities were added/lost so it can adjust the sent events.If
+ // caps_added is true then caps is all the newly set capabilities of the jvmtiEnv. If it is false
+ // then caps is the set of all capabilities that were removed from the jvmtiEnv.
+ ALWAYS_INLINE
+ inline void HandleChangedCapabilities(ArtJvmTiEnv* env,
+ const jvmtiCapabilities& caps,
+ bool added);
+
+ private:
+ template <ArtJvmtiEvent kEvent>
+ ALWAYS_INLINE
+ static inline bool ShouldDispatch(ArtJvmTiEnv* env, art::Thread* thread);
+
+ ALWAYS_INLINE
+ inline bool NeedsEventUpdate(ArtJvmTiEnv* env,
+ const jvmtiCapabilities& caps,
+ bool added);
+
+ // Recalculates the event mask for the given event.
+ ALWAYS_INLINE
+ inline void RecalculateGlobalEventMask(ArtJvmtiEvent event);
+
+ template <ArtJvmtiEvent kEvent>
+ ALWAYS_INLINE inline void DispatchClassFileLoadHookEvent(art::Thread* thread,
+ JNIEnv* jnienv,
+ jclass class_being_redefined,
+ jobject loader,
+ const char* name,
+ jobject protection_domain,
+ jint class_data_len,
+ const unsigned char* class_data,
+ jint* new_class_data_len,
+ unsigned char** new_class_data) const;
+
+ void HandleEventType(ArtJvmtiEvent event, bool enable);
+ void HandleLocalAccessCapabilityAdded();
+
+ // List of all JvmTiEnv objects that have been created, in their creation order.
+ // NB Some elements might be null representing envs that have been deleted. They should be skipped
+ // anytime this list is used.
+ std::vector<ArtJvmTiEnv*> envs;
+
+ // A union of all enabled events, anywhere.
+ EventMask global_mask;
+
+ std::unique_ptr<JvmtiAllocationListener> alloc_listener_;
+ std::unique_ptr<JvmtiGcPauseListener> gc_pause_listener_;
+ std::unique_ptr<JvmtiMethodTraceListener> method_trace_listener_;
+};
+
+} // namespace openjdkjvmti
+
+#endif // ART_OPENJDKJVMTI_EVENTS_H_