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src/share/vm/prims/jvmtiEnvThreadState.hpp@fa83ab460c54 (annotated)

src/share/vm/prims/jvmtiEnvThreadState.hpp

Fri, 22 Oct 2010 15:59:34 -0400

author

acorn

date

Fri, 22 Oct 2010 15:59:34 -0400

changeset 2233

fa83ab460c54

parent 2036

126ea7725993

child 2314

f95d63e2154a

permissions

-rw-r--r--

6988353: refactor contended sync subsystem
Summary: reduce complexity by factoring synchronizer.cpp
Reviewed-by: dholmes, never, coleenp

duke@435	1	/*
trims@1907	2	* Copyright (c) 2003, 2006, Oracle and/or its affiliates. All rights reserved.
duke@435	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@435	4	*
duke@435	5	* This code is free software; you can redistribute it and/or modify it
duke@435	6	* under the terms of the GNU General Public License version 2 only, as
duke@435	7	* published by the Free Software Foundation.
duke@435	8	*
duke@435	9	* This code is distributed in the hope that it will be useful, but WITHOUT
duke@435	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@435	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
duke@435	12	* version 2 for more details (a copy is included in the LICENSE file that
duke@435	13	* accompanied this code).
duke@435	14	*
duke@435	15	* You should have received a copy of the GNU General Public License version
duke@435	16	* 2 along with this work; if not, write to the Free Software Foundation,
duke@435	17	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@435	18	*
trims@1907	19	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
trims@1907	20	* or visit www.oracle.com if you need additional information or have any
trims@1907	21	* questions.
duke@435	22	*
duke@435	23	*/
duke@435	24	#ifndef _JAVA_JVMTIENVTHREADSTATE_H_
duke@435	25	#define _JAVA_JVMTIENVTHREADSTATE_H_
duke@435	26
bobv@2036	27	class JvmtiEnv;
bobv@2036	28
duke@435	29	///////////////////////////////////////////////////////////////
duke@435	30	//
duke@435	31	// class JvmtiFramePop
duke@435	32	// Used by : JvmtiFramePops
duke@435	33	// Used by JVMTI methods: none directly.
duke@435	34	//
duke@435	35	// Wrapper class for FramePop, used in the JvmtiFramePops class.
duke@435	36	//
duke@435	37	// Two problems: 1) this isn't being used as a ValueObj class, in
duke@435	38	// several places there are constructors for it. 2) It seems like
duke@435	39	// overkill as a means to get an assert and name the geater than
duke@435	40	// operator. I'm trying to to rewrite everything.
duke@435	41
duke@435	42	class JvmtiFramePop VALUE_OBJ_CLASS_SPEC {
duke@435	43	private:
duke@435	44	// Frame number counting from BOTTOM (oldest) frame;
duke@435	45	// bottom frame == #0
duke@435	46	int _frame_number;
duke@435	47	public:
duke@435	48	JvmtiFramePop() {}
duke@435	49	JvmtiFramePop(int frame_number) {
duke@435	50	assert(frame_number >= 0, "invalid frame number");
duke@435	51	_frame_number = frame_number;
duke@435	52	}
duke@435	53
duke@435	54	int frame_number() { return _frame_number; }
duke@435	55	int above_on_stack(JvmtiFramePop& other) { return _frame_number > other._frame_number; }
duke@435	56	void print() PRODUCT_RETURN;
duke@435	57	};
duke@435	58
duke@435	59
duke@435	60	///////////////////////////////////////////////////////////////
duke@435	61	//
duke@435	62	// class JvmtiFramePops
duke@435	63	// Used by : JvmtiThreadState
duke@435	64	// Used by JVMTI methods: none directly.
duke@435	65	//
duke@435	66	// A collection of JvmtiFramePop.
duke@435	67	// It records what frames on a threads stack should post frame_pop events when they're exited.
duke@435	68	//
duke@435	69
duke@435	70	class JvmtiFramePops : public CHeapObj {
duke@435	71	private:
duke@435	72	GrowableArray<int>* _pops;
duke@435	73
duke@435	74	// should only be used by JvmtiEventControllerPrivate
duke@435	75	// to insure they only occur at safepoints.
duke@435	76	// Todo: add checks for safepoint
duke@435	77	friend class JvmtiEventControllerPrivate;
duke@435	78	void set(JvmtiFramePop& fp);
duke@435	79	void clear(JvmtiFramePop& fp);
duke@435	80	int clear_to(JvmtiFramePop& fp);
duke@435	81
duke@435	82	public:
duke@435	83	JvmtiFramePops();
duke@435	84	~JvmtiFramePops();
duke@435	85
duke@435	86	bool contains(JvmtiFramePop& fp) { return _pops->contains(fp.frame_number()); }
duke@435	87	int length() { return _pops->length(); }
duke@435	88	void print() PRODUCT_RETURN;
duke@435	89	};
duke@435	90
duke@435	91
duke@435	92	///////////////////////////////////////////////////////////////
duke@435	93	//
duke@435	94	// class JvmtiEnvThreadState
duke@435	95	//
duke@435	96	// 2. Cache of pending frame_pop_events, created by NotifyFramePop
duke@435	97	// and lazily initialized.
duke@435	98	// 3: Location of last executed instruction, used to filter out duplicate
duke@435	99	// events due to instruction rewriting.
duke@435	100
duke@435	101	class JvmtiEnvThreadState : public CHeapObj {
duke@435	102	private:
duke@435	103	friend class JvmtiEnv;
duke@435	104	JavaThread *_thread;
duke@435	105	JvmtiEnv *_env;
duke@435	106	JvmtiEnvThreadState *_next;
duke@435	107	jmethodID _current_method_id;
duke@435	108	int _current_bci;
duke@435	109	bool _breakpoint_posted;
duke@435	110	bool _single_stepping_posted;
duke@435	111	JvmtiEnvThreadEventEnable _event_enable;
duke@435	112	void *_agent_thread_local_storage_data; // per env and per thread agent allocated data.
duke@435	113
duke@435	114	// Class used to store pending framepops.
duke@435	115	// lazily initialized by get_frame_pops();
duke@435	116	JvmtiFramePops *_frame_pops;
duke@435	117
duke@435	118	inline void set_current_location(jmethodID method_id, int bci) {
duke@435	119	_current_method_id = method_id;
duke@435	120	_current_bci = bci;
duke@435	121	}
duke@435	122
duke@435	123	friend class JvmtiEnvThreadStateIterator;
duke@435	124	JvmtiEnvThreadState* next() { return _next; }
duke@435	125
duke@435	126	friend class JvmtiThreadState;
duke@435	127	void set_next(JvmtiEnvThreadState* link) { _next = link; }
duke@435	128
duke@435	129	public:
duke@435	130	JvmtiEnvThreadState(JavaThread *thread, JvmtiEnvBase *env);
duke@435	131	~JvmtiEnvThreadState();
duke@435	132
duke@435	133	bool is_enabled(jvmtiEvent event_type) { return _event_enable.is_enabled(event_type); }
duke@435	134
duke@435	135	JvmtiEnvThreadEventEnable *event_enable() { return &_event_enable; }
duke@435	136	void *get_agent_thread_local_storage_data() { return _agent_thread_local_storage_data; }
duke@435	137	void set_agent_thread_local_storage_data (void *data) { _agent_thread_local_storage_data = data; }
duke@435	138
duke@435	139
duke@435	140	// If the thread is in the given method at the given
duke@435	141	// location just return. Otherwise, reset the current location
duke@435	142	// and reset _breakpoint_posted and _single_stepping_posted.
duke@435	143	// _breakpoint_posted and _single_stepping_posted are only cleared
duke@435	144	// here.
duke@435	145	void compare_and_set_current_location(methodOop method, address location, jvmtiEvent event);
duke@435	146
duke@435	147	void clear_current_location() { set_current_location((jmethodID)NULL, 0); }
duke@435	148
duke@435	149	void reset_current_location(jvmtiEvent event, bool enabled);
duke@435	150
duke@435	151	inline void set_breakpoint_posted() { _breakpoint_posted = true; }
duke@435	152	inline void set_single_stepping_posted() {
duke@435	153	_single_stepping_posted = true;
duke@435	154	}
duke@435	155	inline bool breakpoint_posted() { return _breakpoint_posted; }
duke@435	156	inline bool single_stepping_posted() {
duke@435	157	return _single_stepping_posted;
duke@435	158	}
duke@435	159
duke@435	160	inline JavaThread *get_thread() { return _thread; }
duke@435	161	inline JvmtiEnv *get_env() { return _env; }
duke@435	162
duke@435	163	// lazily initialize _frame_pops
duke@435	164	JvmtiFramePops* get_frame_pops();
duke@435	165
duke@435	166	bool has_frame_pops();
duke@435	167
duke@435	168	// quickly test whether we should deliver a frame pop event on return from sp
duke@435	169	bool is_frame_pop(int cur_stack_depth);
duke@435	170
duke@435	171	void set_frame_pop(int frame_number);
duke@435	172	void clear_frame_pop(int frame_number);
duke@435	173	void clear_to_frame_pop(int frame_number);
duke@435	174
duke@435	175	};
duke@435	176
duke@435	177	#endif /* _JAVA_JVMTIENVTHREADSTATE_H_ */