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src/share/vm/code/icBuffer.hpp@a248d0be1309 (annotated)

src/share/vm/code/icBuffer.hpp

Mon, 19 Aug 2019 10:11:31 +0200

author

neugens

date

Mon, 19 Aug 2019 10:11:31 +0200

changeset 9861

a248d0be1309

parent 6198

55fb97c4c58d

child 6876

710a3c8b516e

permissions

-rw-r--r--

8229401: Fix JFR code cache test failures
8223689: Add JFR Thread Sampling Support
8223690: Add JFR BiasedLock Event Support
8223691: Add JFR G1 Region Type Change Event Support
8223692: Add JFR G1 Heap Summary Event Support
Summary: Backport JFR from JDK11, additional fixes
Reviewed-by: neugens, apetushkov
Contributed-by: denghui.ddh@alibaba-inc.com

duke@435	1	/*
mikael@6198	2	* Copyright (c) 1997, 2013, 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
stefank@2314	25	#ifndef SHARE_VM_CODE_ICBUFFER_HPP
stefank@2314	26	#define SHARE_VM_CODE_ICBUFFER_HPP
stefank@2314	27
kvn@4107	28	#include "asm/codeBuffer.hpp"
stefank@2314	29	#include "code/stubs.hpp"
stefank@2314	30	#include "interpreter/bytecodes.hpp"
stefank@2314	31	#include "memory/allocation.hpp"
stefank@2314	32
duke@435	33	//
duke@435	34	// For CompiledIC's:
duke@435	35	//
duke@435	36	// In cases where we do not have MT-safe state transformation,
duke@435	37	// we go to a transition state, using ICStubs. At a safepoint,
duke@435	38	// the inline caches are transferred from the transitional code:
duke@435	39	//
duke@435	40	// instruction_address --> 01 set xxx_oop, Ginline_cache_klass
duke@435	41	// 23 jump_to Gtemp, yyyy
duke@435	42	// 4 nop
duke@435	43
duke@435	44	class ICStub: public Stub {
duke@435	45	private:
duke@435	46	int _size; // total size of the stub incl. code
duke@435	47	address _ic_site; // points at call instruction of owning ic-buffer
duke@435	48	/* stub code follows here */
duke@435	49	protected:
duke@435	50	friend class ICStubInterface;
duke@435	51	// This will be called only by ICStubInterface
kvn@4107	52	void initialize(int size,
roland@4767	53	CodeStrings strings) { _size = size; _ic_site = NULL; }
duke@435	54	void finalize(); // called when a method is removed
duke@435	55
duke@435	56	// General info
duke@435	57	int size() const { return _size; }
duke@435	58	static int code_size_to_size(int code_size) { return round_to(sizeof(ICStub), CodeEntryAlignment) + code_size; }
duke@435	59
duke@435	60	public:
duke@435	61	// Creation
coleenp@4037	62	void set_stub(CompiledIC *ic, void* cached_value, address dest_addr);
duke@435	63
duke@435	64	// Code info
duke@435	65	address code_begin() const { return (address)this + round_to(sizeof(ICStub), CodeEntryAlignment); }
duke@435	66	address code_end() const { return (address)this + size(); }
duke@435	67
duke@435	68	// Call site info
duke@435	69	address ic_site() const { return _ic_site; }
duke@435	70	void clear();
duke@435	71	bool is_empty() const { return _ic_site == NULL; }
duke@435	72
duke@435	73	// stub info
duke@435	74	address destination() const; // destination of jump instruction
coleenp@4037	75	void* cached_value() const; // cached_value for stub
duke@435	76
duke@435	77	// Debugging
duke@435	78	void verify() PRODUCT_RETURN;
duke@435	79	void print() PRODUCT_RETURN;
duke@435	80
duke@435	81	// Creation
duke@435	82	friend ICStub* ICStub_from_destination_address(address destination_address);
duke@435	83	};
duke@435	84
duke@435	85	// ICStub Creation
duke@435	86	inline ICStub* ICStub_from_destination_address(address destination_address) {
duke@435	87	ICStub* stub = (ICStub*) (destination_address - round_to(sizeof(ICStub), CodeEntryAlignment));
duke@435	88	#ifdef ASSERT
duke@435	89	stub->verify();
duke@435	90	#endif
duke@435	91	return stub;
duke@435	92	}
duke@435	93
duke@435	94	class InlineCacheBuffer: public AllStatic {
duke@435	95	private:
duke@435	96	// friends
duke@435	97	friend class ICStub;
duke@435	98
duke@435	99	static int ic_stub_code_size();
duke@435	100
duke@435	101	static StubQueue* _buffer;
duke@435	102	static ICStub* _next_stub;
duke@435	103
coleenp@4037	104	static CompiledICHolder* _pending_released;
coleenp@4037	105	static int _pending_count;
coleenp@4037	106
duke@435	107	static StubQueue* buffer() { return _buffer; }
duke@435	108	static void set_next_stub(ICStub* next_stub) { _next_stub = next_stub; }
duke@435	109	static ICStub* get_next_stub() { return _next_stub; }
duke@435	110
duke@435	111	static void init_next_stub();
duke@435	112
duke@435	113	static ICStub* new_ic_stub();
duke@435	114
duke@435	115
duke@435	116	// Machine-dependent implementation of ICBuffer
coleenp@4037	117	static void assemble_ic_buffer_code(address code_begin, void* cached_value, address entry_point);
duke@435	118	static address ic_buffer_entry_point (address code_begin);
coleenp@4037	119	static void* ic_buffer_cached_value (address code_begin);
duke@435	120
duke@435	121	public:
duke@435	122
duke@435	123	// Initialization; must be called before first usage
duke@435	124	static void initialize();
duke@435	125
duke@435	126	// Access
duke@435	127	static bool contains(address instruction_address);
duke@435	128
duke@435	129	// removes the ICStubs after backpatching
duke@435	130	static void update_inline_caches();
duke@435	131
duke@435	132	// for debugging
duke@435	133	static bool is_empty();
duke@435	134
coleenp@4037	135	static void release_pending_icholders();
coleenp@4037	136	static void queue_for_release(CompiledICHolder* icholder);
coleenp@4037	137	static int pending_icholder_count() { return _pending_count; }
duke@435	138
duke@435	139	// New interface
coleenp@4037	140	static void create_transition_stub(CompiledIC *ic, void* cached_value, address entry);
duke@435	141	static address ic_destination_for(CompiledIC *ic);
coleenp@4037	142	static void* cached_value_for(CompiledIC *ic);
duke@435	143	};
stefank@2314	144
stefank@2314	145	#endif // SHARE_VM_CODE_ICBUFFER_HPP