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src/share/vm/oops/methodCounters.hpp@4f9a42c33738 (annotated)

src/share/vm/oops/methodCounters.hpp

Fri, 20 Sep 2013 09:30:02 -0400

author

coleenp

date

Fri, 20 Sep 2013 09:30:02 -0400

changeset 5749

4f9a42c33738

parent 0

f90c822e73f8

child 7171

631667807de7

permissions

-rw-r--r--

8022887: Assertion hit while using class and redefining it with RedefineClasses simultaneously
Summary: Need to refetch each method from InstanceKlass after all safepoints. Removed leaky PreviousVersionInfo code.
Reviewed-by: dcubed, sspitsyn

aoqi@0	1	/*
aoqi@0	2	* Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
aoqi@0	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0	4	*
aoqi@0	5	* This code is free software; you can redistribute it and/or modify it
aoqi@0	6	* under the terms of the GNU General Public License version 2 only, as
aoqi@0	7	* published by the Free Software Foundation.
aoqi@0	8	*
aoqi@0	9	* This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
aoqi@0	12	* version 2 for more details (a copy is included in the LICENSE file that
aoqi@0	13	* accompanied this code).
aoqi@0	14	*
aoqi@0	15	* You should have received a copy of the GNU General Public License version
aoqi@0	16	* 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0	17	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0	18	*
aoqi@0	19	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0	20	* or visit www.oracle.com if you need additional information or have any
aoqi@0	21	* questions.
aoqi@0	22	*
aoqi@0	23	*/
aoqi@0	24
aoqi@0	25	#ifndef SHARE_VM_OOPS_METHODCOUNTERS_HPP
aoqi@0	26	#define SHARE_VM_OOPS_METHODCOUNTERS_HPP
aoqi@0	27
aoqi@0	28	#include "oops/metadata.hpp"
aoqi@0	29	#include "interpreter/invocationCounter.hpp"
aoqi@0	30
aoqi@0	31	class MethodCounters: public MetaspaceObj {
aoqi@0	32	friend class VMStructs;
aoqi@0	33	private:
aoqi@0	34	int _interpreter_invocation_count; // Count of times invoked (reused as prev_event_count in tiered)
aoqi@0	35	u2 _interpreter_throwout_count; // Count of times method was exited via exception while interpreting
aoqi@0	36	u2 _number_of_breakpoints; // fullspeed debugging support
aoqi@0	37	InvocationCounter _invocation_counter; // Incremented before each activation of the method - used to trigger frequency-based optimizations
aoqi@0	38	InvocationCounter _backedge_counter; // Incremented before each backedge taken - used to trigger frequencey-based optimizations
aoqi@0	39
aoqi@0	40	#ifdef TIERED
aoqi@0	41	float _rate; // Events (invocation and backedge counter increments) per millisecond
aoqi@0	42	jlong _prev_time; // Previous time the rate was acquired
aoqi@0	43	#endif
aoqi@0	44
aoqi@0	45	MethodCounters() : _interpreter_invocation_count(0),
aoqi@0	46	_interpreter_throwout_count(0),
aoqi@0	47	_number_of_breakpoints(0)
aoqi@0	48	#ifdef TIERED
aoqi@0	49	, _rate(0),
aoqi@0	50	_prev_time(0)
aoqi@0	51	#endif
aoqi@0	52	{
aoqi@0	53	invocation_counter()->init();
aoqi@0	54	backedge_counter()->init();
aoqi@0	55	}
aoqi@0	56
aoqi@0	57	public:
aoqi@0	58	static MethodCounters* allocate(ClassLoaderData* loader_data, TRAPS);
aoqi@0	59
aoqi@0	60	void deallocate_contents(ClassLoaderData* loader_data) {}
aoqi@0	61	DEBUG_ONLY(bool on_stack() { return false; }) // for template
aoqi@0	62
aoqi@0	63	static int size() { return sizeof(MethodCounters) / wordSize; }
aoqi@0	64
aoqi@0	65	bool is_klass() const { return false; }
aoqi@0	66
aoqi@0	67	void clear_counters();
aoqi@0	68
aoqi@0	69	int interpreter_invocation_count() {
aoqi@0	70	return _interpreter_invocation_count;
aoqi@0	71	}
aoqi@0	72	void set_interpreter_invocation_count(int count) {
aoqi@0	73	_interpreter_invocation_count = count;
aoqi@0	74	}
aoqi@0	75	int increment_interpreter_invocation_count() {
aoqi@0	76	return ++_interpreter_invocation_count;
aoqi@0	77	}
aoqi@0	78
aoqi@0	79	void interpreter_throwout_increment() {
aoqi@0	80	if (_interpreter_throwout_count < 65534) {
aoqi@0	81	_interpreter_throwout_count++;
aoqi@0	82	}
aoqi@0	83	}
aoqi@0	84	int interpreter_throwout_count() const {
aoqi@0	85	return _interpreter_throwout_count;
aoqi@0	86	}
aoqi@0	87	void set_interpreter_throwout_count(int count) {
aoqi@0	88	_interpreter_throwout_count = count;
aoqi@0	89	}
aoqi@0	90
aoqi@0	91	u2 number_of_breakpoints() const { return _number_of_breakpoints; }
aoqi@0	92	void incr_number_of_breakpoints() { ++_number_of_breakpoints; }
aoqi@0	93	void decr_number_of_breakpoints() { --_number_of_breakpoints; }
aoqi@0	94	void clear_number_of_breakpoints() { _number_of_breakpoints = 0; }
aoqi@0	95
aoqi@0	96	#ifdef TIERED
aoqi@0	97	jlong prev_time() const { return _prev_time; }
aoqi@0	98	void set_prev_time(jlong time) { _prev_time = time; }
aoqi@0	99	float rate() const { return _rate; }
aoqi@0	100	void set_rate(float rate) { _rate = rate; }
aoqi@0	101	#endif
aoqi@0	102
aoqi@0	103	// invocation counter
aoqi@0	104	InvocationCounter* invocation_counter() { return &_invocation_counter; }
aoqi@0	105	InvocationCounter* backedge_counter() { return &_backedge_counter; }
aoqi@0	106
aoqi@0	107	static ByteSize interpreter_invocation_counter_offset() {
aoqi@0	108	return byte_offset_of(MethodCounters, _interpreter_invocation_count);
aoqi@0	109	}
aoqi@0	110
aoqi@0	111	static ByteSize invocation_counter_offset() {
aoqi@0	112	return byte_offset_of(MethodCounters, _invocation_counter);
aoqi@0	113	}
aoqi@0	114
aoqi@0	115	static ByteSize backedge_counter_offset() {
aoqi@0	116	return byte_offset_of(MethodCounters, _backedge_counter);
aoqi@0	117	}
aoqi@0	118
aoqi@0	119	static int interpreter_invocation_counter_offset_in_bytes() {
aoqi@0	120	return offset_of(MethodCounters, _interpreter_invocation_count);
aoqi@0	121	}
aoqi@0	122
aoqi@0	123	};
aoqi@0	124	#endif //SHARE_VM_OOPS_METHODCOUNTERS_HPP