author | coleenp |
Thu, 27 Jun 2019 11:40:18 -0400 | |
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/* |
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* Copyright (c) 2003, 2019, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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* |
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*/ |
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#ifndef SHARE_PRIMS_JVMTIENVTHREADSTATE_HPP |
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#define SHARE_PRIMS_JVMTIENVTHREADSTATE_HPP |
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#include "jvmtifiles/jvmti.h" |
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#include "memory/allocation.hpp" |
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#include "oops/instanceKlass.hpp" |
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#include "prims/jvmtiEventController.hpp" |
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#include "utilities/globalDefinitions.hpp" |
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#include "utilities/growableArray.hpp" |
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class JvmtiEnv; |
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/////////////////////////////////////////////////////////////// |
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// |
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// class JvmtiFramePop |
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// Used by : JvmtiFramePops |
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// Used by JVMTI methods: none directly. |
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// |
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// Wrapper class for FramePop, used in the JvmtiFramePops class. |
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// |
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// Two problems: 1) this isn't being used as a value class, in |
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// several places there are constructors for it. 2) It seems like |
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// overkill as a means to get an assert and name the greater than |
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// operator. I'm trying to to rewrite everything. |
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class JvmtiFramePop { |
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// Frame number counting from BOTTOM (oldest) frame; |
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// bottom frame == #0 |
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int _frame_number; |
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public: |
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JvmtiFramePop() {} |
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JvmtiFramePop(int frame_number) { |
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assert(frame_number >= 0, "invalid frame number"); |
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_frame_number = frame_number; |
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} |
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int frame_number() { return _frame_number; } |
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int above_on_stack(JvmtiFramePop& other) { return _frame_number > other._frame_number; } |
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void print() PRODUCT_RETURN; |
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}; |
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/////////////////////////////////////////////////////////////// |
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// |
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// class JvmtiFramePops |
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// Used by : JvmtiThreadState |
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// Used by JVMTI methods: none directly. |
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// |
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// A collection of JvmtiFramePop. |
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// It records what frames on a threads stack should post frame_pop events when they're exited. |
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// |
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class JvmtiFramePops : public CHeapObj<mtInternal> { |
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private: |
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GrowableArray<int>* _pops; |
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// should only be used by JvmtiEventControllerPrivate |
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// to insure they only occur at safepoints. |
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// Todo: add checks for safepoint |
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friend class JvmtiEventControllerPrivate; |
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void set(JvmtiFramePop& fp); |
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void clear(JvmtiFramePop& fp); |
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int clear_to(JvmtiFramePop& fp); |
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public: |
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JvmtiFramePops(); |
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~JvmtiFramePops(); |
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bool contains(JvmtiFramePop& fp) { return _pops->contains(fp.frame_number()); } |
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int length() { return _pops->length(); } |
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void print() PRODUCT_RETURN; |
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}; |
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/////////////////////////////////////////////////////////////// |
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// |
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// class JvmtiEnvThreadState |
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// |
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// 2. Cache of pending frame_pop_events, created by NotifyFramePop |
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// and lazily initialized. |
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// 3: Location of last executed instruction, used to filter out duplicate |
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// events due to instruction rewriting. |
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class JvmtiEnvThreadState : public CHeapObj<mtInternal> { |
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private: |
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friend class JvmtiEnv; |
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JavaThread *_thread; |
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JvmtiEnv *_env; |
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JvmtiEnvThreadState *_next; |
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jmethodID _current_method_id; |
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int _current_bci; |
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bool _breakpoint_posted; |
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bool _single_stepping_posted; |
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JvmtiEnvThreadEventEnable _event_enable; |
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void *_agent_thread_local_storage_data; // per env and per thread agent allocated data. |
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// Class used to store pending framepops. |
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// lazily initialized by get_frame_pops(); |
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JvmtiFramePops *_frame_pops; |
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inline void set_current_location(jmethodID method_id, int bci) { |
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_current_method_id = method_id; |
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_current_bci = bci; |
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} |
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friend class JvmtiEnvThreadStateIterator; |
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JvmtiEnvThreadState* next() { return _next; } |
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friend class JvmtiThreadState; |
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void set_next(JvmtiEnvThreadState* link) { _next = link; } |
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public: |
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JvmtiEnvThreadState(JavaThread *thread, JvmtiEnvBase *env); |
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~JvmtiEnvThreadState(); |
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bool is_enabled(jvmtiEvent event_type) { return _event_enable.is_enabled(event_type); } |
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JvmtiEnvThreadEventEnable *event_enable() { return &_event_enable; } |
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void *get_agent_thread_local_storage_data() { return _agent_thread_local_storage_data; } |
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void set_agent_thread_local_storage_data (void *data) { _agent_thread_local_storage_data = data; } |
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// If the thread is in the given method at the given |
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// location just return. Otherwise, reset the current location |
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// and reset _breakpoint_posted and _single_stepping_posted. |
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// _breakpoint_posted and _single_stepping_posted are only cleared |
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// here. |
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void compare_and_set_current_location(Method* method, address location, jvmtiEvent event); |
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void clear_current_location() { set_current_location((jmethodID)NULL, 0); } |
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void reset_current_location(jvmtiEvent event, bool enabled); |
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inline void set_breakpoint_posted() { _breakpoint_posted = true; } |
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inline void set_single_stepping_posted() { |
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_single_stepping_posted = true; |
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} |
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inline bool breakpoint_posted() { return _breakpoint_posted; } |
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inline bool single_stepping_posted() { |
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return _single_stepping_posted; |
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} |
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inline JavaThread *get_thread() { return _thread; } |
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inline JvmtiEnv *get_env() { return _env; } |
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// lazily initialize _frame_pops |
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JvmtiFramePops* get_frame_pops(); |
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bool has_frame_pops(); |
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// quickly test whether we should deliver a frame pop event on return from sp |
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bool is_frame_pop(int cur_stack_depth); |
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void set_frame_pop(int frame_number); |
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void clear_frame_pop(int frame_number); |
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void clear_to_frame_pop(int frame_number); |
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}; |
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#endif // SHARE_PRIMS_JVMTIENVTHREADSTATE_HPP |