1 /* Copyright (C) 2017 The Android Open Source Project
2 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
3 *
4 * This file implements interfaces from the file jvmti.h. This implementation
5 * is licensed under the same terms as the file jvmti.h. The
6 * copyright and license information for the file jvmti.h follows.
7 *
8 * Copyright (c) 2003, 2011, Oracle and/or its affiliates. All rights reserved.
9 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
10 *
11 * This code is free software; you can redistribute it and/or modify it
12 * under the terms of the GNU General Public License version 2 only, as
13 * published by the Free Software Foundation. Oracle designates this
14 * particular file as subject to the "Classpath" exception as provided
15 * by Oracle in the LICENSE file that accompanied this code.
16 *
17 * This code is distributed in the hope that it will be useful, but WITHOUT
18 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
19 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
20 * version 2 for more details (a copy is included in the LICENSE file that
21 * accompanied this code).
22 *
23 * You should have received a copy of the GNU General Public License version
24 * 2 along with this work; if not, write to the Free Software Foundation,
25 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
26 *
27 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
28 * or visit www.oracle.com if you need additional information or have any
29 * questions.
30 */
31
32 #include "ti_phase.h"
33
34 #include "art_jvmti.h"
35 #include "base/macros.h"
36 #include "events-inl.h"
37 #include "runtime.h"
38 #include "runtime_callbacks.h"
39 #include "ScopedLocalRef.h"
40 #include "scoped_thread_state_change-inl.h"
41 #include "thread-inl.h"
42 #include "thread_list.h"
43 #include "ti_thread.h"
44
45 namespace openjdkjvmti {
46
47 jvmtiPhase PhaseUtil::current_phase_ = static_cast<jvmtiPhase>(0);
48
49 struct PhaseUtil::PhaseCallback : public art::RuntimePhaseCallback {
GetJniEnvopenjdkjvmti::PhaseUtil::PhaseCallback50 inline static JNIEnv* GetJniEnv() {
51 return reinterpret_cast<JNIEnv*>(art::Thread::Current()->GetJniEnv());
52 }
53
GetCurrentJThreadopenjdkjvmti::PhaseUtil::PhaseCallback54 inline static jthread GetCurrentJThread() {
55 art::ScopedObjectAccess soa(art::Thread::Current());
56 return soa.AddLocalReference<jthread>(soa.Self()->GetPeer());
57 }
58
NextRuntimePhaseopenjdkjvmti::PhaseUtil::PhaseCallback59 void NextRuntimePhase(RuntimePhase phase) REQUIRES_SHARED(art::Locks::mutator_lock_) OVERRIDE {
60 switch (phase) {
61 case RuntimePhase::kInitialAgents:
62 PhaseUtil::current_phase_ = JVMTI_PHASE_PRIMORDIAL;
63 break;
64 case RuntimePhase::kStart:
65 {
66 art::ScopedThreadSuspension sts(art::Thread::Current(), art::ThreadState::kNative);
67 event_handler->DispatchEvent<ArtJvmtiEvent::kVmStart>(nullptr, GetJniEnv());
68 PhaseUtil::current_phase_ = JVMTI_PHASE_START;
69 }
70 break;
71 case RuntimePhase::kInit:
72 {
73 ThreadUtil::CacheData();
74 ScopedLocalRef<jthread> thread(GetJniEnv(), GetCurrentJThread());
75 art::ScopedThreadSuspension sts(art::Thread::Current(), art::ThreadState::kNative);
76 event_handler->DispatchEvent<ArtJvmtiEvent::kVmInit>(nullptr, GetJniEnv(), thread.get());
77 PhaseUtil::current_phase_ = JVMTI_PHASE_LIVE;
78 }
79 break;
80 case RuntimePhase::kDeath:
81 {
82 art::ScopedThreadSuspension sts(art::Thread::Current(), art::ThreadState::kNative);
83 event_handler->DispatchEvent<ArtJvmtiEvent::kVmDeath>(nullptr, GetJniEnv());
84 PhaseUtil::current_phase_ = JVMTI_PHASE_DEAD;
85 }
86 // TODO: Block events now.
87 break;
88 }
89 }
90
91 EventHandler* event_handler = nullptr;
92 };
93
94 PhaseUtil::PhaseCallback gPhaseCallback;
95
GetPhase(jvmtiEnv * env ATTRIBUTE_UNUSED,jvmtiPhase * phase_ptr)96 jvmtiError PhaseUtil::GetPhase(jvmtiEnv* env ATTRIBUTE_UNUSED, jvmtiPhase* phase_ptr) {
97 if (phase_ptr == nullptr) {
98 return ERR(NULL_POINTER);
99 }
100 jvmtiPhase now = PhaseUtil::current_phase_;
101 DCHECK(now == JVMTI_PHASE_ONLOAD ||
102 now == JVMTI_PHASE_PRIMORDIAL ||
103 now == JVMTI_PHASE_START ||
104 now == JVMTI_PHASE_LIVE ||
105 now == JVMTI_PHASE_DEAD);
106 *phase_ptr = now;
107 return ERR(NONE);
108 }
109
IsLivePhase()110 bool PhaseUtil::IsLivePhase() {
111 jvmtiPhase now = PhaseUtil::current_phase_;
112 DCHECK(now == JVMTI_PHASE_ONLOAD ||
113 now == JVMTI_PHASE_PRIMORDIAL ||
114 now == JVMTI_PHASE_START ||
115 now == JVMTI_PHASE_LIVE ||
116 now == JVMTI_PHASE_DEAD);
117 return now == JVMTI_PHASE_LIVE;
118 }
119
SetToOnLoad()120 void PhaseUtil::SetToOnLoad() {
121 DCHECK_EQ(0u, static_cast<size_t>(PhaseUtil::current_phase_));
122 PhaseUtil::current_phase_ = JVMTI_PHASE_ONLOAD;
123 }
124
SetToPrimordial()125 void PhaseUtil::SetToPrimordial() {
126 DCHECK_EQ(static_cast<size_t>(JVMTI_PHASE_ONLOAD), static_cast<size_t>(PhaseUtil::current_phase_));
127 PhaseUtil::current_phase_ = JVMTI_PHASE_ONLOAD;
128 }
129
SetToLive()130 void PhaseUtil::SetToLive() {
131 DCHECK_EQ(static_cast<size_t>(0), static_cast<size_t>(PhaseUtil::current_phase_));
132 ThreadUtil::CacheData();
133 PhaseUtil::current_phase_ = JVMTI_PHASE_LIVE;
134 }
135
Register(EventHandler * handler)136 void PhaseUtil::Register(EventHandler* handler) {
137 gPhaseCallback.event_handler = handler;
138 art::ScopedThreadStateChange stsc(art::Thread::Current(),
139 art::ThreadState::kWaitingForDebuggerToAttach);
140 art::ScopedSuspendAll ssa("Add phase callback");
141 art::Runtime::Current()->GetRuntimeCallbacks()->AddRuntimePhaseCallback(&gPhaseCallback);
142 }
143
Unregister()144 void PhaseUtil::Unregister() {
145 art::ScopedThreadStateChange stsc(art::Thread::Current(),
146 art::ThreadState::kWaitingForDebuggerToAttach);
147 art::ScopedSuspendAll ssa("Remove phase callback");
148 art::Runtime::Current()->GetRuntimeCallbacks()->RemoveRuntimePhaseCallback(&gPhaseCallback);
149 }
150
GetPhaseUnchecked()151 jvmtiPhase PhaseUtil::GetPhaseUnchecked() {
152 return PhaseUtil::current_phase_;
153 }
154
155 } // namespace openjdkjvmti
156