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/* 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.
*/
#include "ti_phase.h"
#include "art_jvmti.h"
#include "base/macros.h"
#include "events-inl.h"
#include "nativehelper/scoped_local_ref.h"
#include "runtime.h"
#include "runtime_callbacks.h"
#include "scoped_thread_state_change-inl.h"
#include "thread-current-inl.h"
#include "thread_list.h"
#include "ti_thread.h"
namespace openjdkjvmti {
jvmtiPhase PhaseUtil::current_phase_ = static_cast<jvmtiPhase>(0);
struct PhaseUtil::PhaseCallback : public art::RuntimePhaseCallback {
inline static JNIEnv* GetJniEnv() {
return reinterpret_cast<JNIEnv*>(art::Thread::Current()->GetJniEnv());
}
inline static jthread GetCurrentJThread() {
art::ScopedObjectAccess soa(art::Thread::Current());
return soa.AddLocalReference<jthread>(soa.Self()->GetPeer());
}
void NextRuntimePhase(RuntimePhase phase) REQUIRES_SHARED(art::Locks::mutator_lock_) override {
art::Thread* self = art::Thread::Current();
switch (phase) {
case RuntimePhase::kInitialAgents:
PhaseUtil::current_phase_ = JVMTI_PHASE_PRIMORDIAL;
break;
case RuntimePhase::kStart:
{
PhaseUtil::current_phase_ = JVMTI_PHASE_START;
event_handler->DispatchEvent<ArtJvmtiEvent::kVmStart>(self, GetJniEnv());
}
break;
case RuntimePhase::kInit:
{
ThreadUtil::CacheData();
PhaseUtil::current_phase_ = JVMTI_PHASE_LIVE;
{
ScopedLocalRef<jthread> thread(GetJniEnv(), GetCurrentJThread());
event_handler->DispatchEvent<ArtJvmtiEvent::kVmInit>(self, GetJniEnv(), thread.get());
}
// We need to have these events be ordered to match behavior expected by some real-world
// agents. The spec does not really require this but compatibility is a useful property to
// maintain.
ThreadUtil::VMInitEventSent();
}
break;
case RuntimePhase::kDeath:
{
event_handler->DispatchEvent<ArtJvmtiEvent::kVmDeath>(self, GetJniEnv());
PhaseUtil::current_phase_ = JVMTI_PHASE_DEAD;
}
// TODO: Block events now.
break;
}
}
EventHandler* event_handler = nullptr;
};
PhaseUtil::PhaseCallback gPhaseCallback;
jvmtiError PhaseUtil::GetPhase(jvmtiEnv* env ATTRIBUTE_UNUSED, jvmtiPhase* phase_ptr) {
if (phase_ptr == nullptr) {
return ERR(NULL_POINTER);
}
jvmtiPhase now = PhaseUtil::current_phase_;
DCHECK(now == JVMTI_PHASE_ONLOAD ||
now == JVMTI_PHASE_PRIMORDIAL ||
now == JVMTI_PHASE_START ||
now == JVMTI_PHASE_LIVE ||
now == JVMTI_PHASE_DEAD);
*phase_ptr = now;
return ERR(NONE);
}
bool PhaseUtil::IsLivePhase() {
jvmtiPhase now = PhaseUtil::current_phase_;
DCHECK(now == JVMTI_PHASE_ONLOAD ||
now == JVMTI_PHASE_PRIMORDIAL ||
now == JVMTI_PHASE_START ||
now == JVMTI_PHASE_LIVE ||
now == JVMTI_PHASE_DEAD);
return now == JVMTI_PHASE_LIVE;
}
void PhaseUtil::SetToOnLoad() {
DCHECK_EQ(0u, static_cast<size_t>(PhaseUtil::current_phase_));
PhaseUtil::current_phase_ = JVMTI_PHASE_ONLOAD;
}
void PhaseUtil::SetToPrimordial() {
DCHECK_EQ(static_cast<size_t>(JVMTI_PHASE_ONLOAD), static_cast<size_t>(PhaseUtil::current_phase_));
PhaseUtil::current_phase_ = JVMTI_PHASE_ONLOAD;
}
void PhaseUtil::SetToLive() {
DCHECK_EQ(static_cast<size_t>(0), static_cast<size_t>(PhaseUtil::current_phase_));
ThreadUtil::CacheData();
PhaseUtil::current_phase_ = JVMTI_PHASE_LIVE;
}
void PhaseUtil::Register(EventHandler* handler) {
gPhaseCallback.event_handler = handler;
art::ScopedThreadStateChange stsc(art::Thread::Current(),
art::ThreadState::kWaitingForDebuggerToAttach);
art::ScopedSuspendAll ssa("Add phase callback");
art::Runtime::Current()->GetRuntimeCallbacks()->AddRuntimePhaseCallback(&gPhaseCallback);
}
void PhaseUtil::Unregister() {
art::ScopedThreadStateChange stsc(art::Thread::Current(),
art::ThreadState::kWaitingForDebuggerToAttach);
art::ScopedSuspendAll ssa("Remove phase callback");
art::Runtime::Current()->GetRuntimeCallbacks()->RemoveRuntimePhaseCallback(&gPhaseCallback);
}
jvmtiPhase PhaseUtil::GetPhaseUnchecked() {
return PhaseUtil::current_phase_;
}
} // namespace openjdkjvmti
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