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src/share/vm/runtime/compilationPolicy.hpp@eef07cd490d4 (annotated)

src/share/vm/runtime/compilationPolicy.hpp

Wed, 03 Jul 2019 20:42:37 +0800

author

aoqi

date

Wed, 03 Jul 2019 20:42:37 +0800

changeset 9637

eef07cd490d4

parent 6876

710a3c8b516e

permissions

-rw-r--r--

Merge

aoqi@0	1	/*
aoqi@0	2	* Copyright (c) 2000, 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_RUNTIME_COMPILATIONPOLICY_HPP
aoqi@0	26	#define SHARE_VM_RUNTIME_COMPILATIONPOLICY_HPP
aoqi@0	27
aoqi@0	28	#include "code/nmethod.hpp"
aoqi@0	29	#include "compiler/compileBroker.hpp"
aoqi@0	30	#include "memory/allocation.hpp"
aoqi@0	31	#include "runtime/vm_operations.hpp"
aoqi@0	32	#include "utilities/growableArray.hpp"
aoqi@0	33
aoqi@0	34	// The CompilationPolicy selects which method (if any) should be compiled.
aoqi@0	35	// It also decides which methods must always be compiled (i.e., are never
aoqi@0	36	// interpreted).
aoqi@0	37	class CompileTask;
aoqi@0	38	class CompileQueue;
aoqi@0	39
aoqi@0	40	class CompilationPolicy : public CHeapObj<mtCompiler> {
aoqi@0	41	static CompilationPolicy* _policy;
aoqi@0	42	// Accumulated time
aoqi@0	43	static elapsedTimer _accumulated_time;
aoqi@0	44
aoqi@0	45	static bool _in_vm_startup;
aoqi@0	46	public:
aoqi@0	47	static void set_in_vm_startup(bool in_vm_startup) { _in_vm_startup = in_vm_startup; }
aoqi@0	48	static void completed_vm_startup();
aoqi@0	49	static bool delay_compilation_during_startup() { return _in_vm_startup; }
aoqi@0	50
aoqi@0	51	// m must be compiled before executing it
aoqi@0	52	static bool must_be_compiled(methodHandle m, int comp_level = CompLevel_all);
aoqi@0	53	// m is allowed to be compiled
aoqi@0	54	static bool can_be_compiled(methodHandle m, int comp_level = CompLevel_all);
aoqi@0	55	// m is allowed to be osr compiled
aoqi@0	56	static bool can_be_osr_compiled(methodHandle m, int comp_level = CompLevel_all);
aoqi@0	57	static bool is_compilation_enabled();
aoqi@0	58	static void set_policy(CompilationPolicy* policy) { _policy = policy; }
aoqi@0	59	static CompilationPolicy* policy() { return _policy; }
aoqi@0	60
aoqi@0	61	// Profiling
aoqi@0	62	elapsedTimer* accumulated_time() { return &_accumulated_time; }
aoqi@0	63	void print_time() PRODUCT_RETURN;
aoqi@0	64	// Return initial compile level that is used with Xcomp
aoqi@0	65	virtual CompLevel initial_compile_level() = 0;
aoqi@0	66	virtual int compiler_count(CompLevel comp_level) = 0;
aoqi@0	67	// main notification entry, return a pointer to an nmethod if the OSR is required,
aoqi@0	68	// returns NULL otherwise.
aoqi@0	69	virtual nmethod* event(methodHandle method, methodHandle inlinee, int branch_bci, int bci, CompLevel comp_level, nmethod* nm, JavaThread* thread) = 0;
aoqi@0	70	// safepoint() is called at the end of the safepoint
aoqi@0	71	virtual void do_safepoint_work() = 0;
aoqi@0	72	// reprofile request
aoqi@0	73	virtual void reprofile(ScopeDesc* trap_scope, bool is_osr) = 0;
aoqi@0	74	// delay_compilation(method) can be called by any component of the runtime to notify the policy
aoqi@0	75	// that it's recommended to delay the complation of this method.
aoqi@0	76	virtual void delay_compilation(Method* method) = 0;
aoqi@0	77	// disable_compilation() is called whenever the runtime decides to disable compilation of the
aoqi@0	78	// specified method.
aoqi@0	79	virtual void disable_compilation(Method* method) = 0;
aoqi@0	80	// Select task is called by CompileBroker. The queue is guaranteed to have at least one
aoqi@0	81	// element and is locked. The function should select one and return it.
aoqi@0	82	virtual CompileTask* select_task(CompileQueue* compile_queue) = 0;
aoqi@0	83	// Tell the runtime if we think a given method is adequately profiled.
aoqi@0	84	virtual bool is_mature(Method* method) = 0;
aoqi@0	85	// Do policy initialization
aoqi@0	86	virtual void initialize() = 0;
aoqi@0	87	virtual bool should_not_inline(ciEnv* env, ciMethod* method) { return false; }
aoqi@0	88	};
aoqi@0	89
aoqi@0	90	// A base class for baseline policies.
aoqi@0	91	class NonTieredCompPolicy : public CompilationPolicy {
aoqi@0	92	int _compiler_count;
aoqi@0	93	protected:
aoqi@0	94	static void trace_frequency_counter_overflow(methodHandle m, int branch_bci, int bci);
aoqi@0	95	static void trace_osr_request(methodHandle method, nmethod* osr, int bci);
aoqi@0	96	static void trace_osr_completion(nmethod* osr_nm);
aoqi@0	97	void reset_counter_for_invocation_event(methodHandle method);
aoqi@0	98	void reset_counter_for_back_branch_event(methodHandle method);
aoqi@0	99	public:
aoqi@0	100	NonTieredCompPolicy() : _compiler_count(0) { }
aoqi@0	101	virtual CompLevel initial_compile_level() { return CompLevel_highest_tier; }
aoqi@0	102	virtual int compiler_count(CompLevel comp_level);
aoqi@0	103	virtual void do_safepoint_work();
aoqi@0	104	virtual void reprofile(ScopeDesc* trap_scope, bool is_osr);
aoqi@0	105	virtual void delay_compilation(Method* method);
aoqi@0	106	virtual void disable_compilation(Method* method);
aoqi@0	107	virtual bool is_mature(Method* method);
aoqi@0	108	virtual void initialize();
aoqi@0	109	virtual CompileTask* select_task(CompileQueue* compile_queue);
aoqi@0	110	virtual nmethod* event(methodHandle method, methodHandle inlinee, int branch_bci, int bci, CompLevel comp_level, nmethod* nm, JavaThread* thread);
aoqi@0	111	virtual void method_invocation_event(methodHandle m, JavaThread* thread) = 0;
aoqi@0	112	virtual void method_back_branch_event(methodHandle m, int bci, JavaThread* thread) = 0;
aoqi@0	113	};
aoqi@0	114
aoqi@0	115	class SimpleCompPolicy : public NonTieredCompPolicy {
aoqi@0	116	public:
aoqi@0	117	virtual void method_invocation_event(methodHandle m, JavaThread* thread);
aoqi@0	118	virtual void method_back_branch_event(methodHandle m, int bci, JavaThread* thread);
aoqi@0	119	};
aoqi@0	120
aoqi@0	121	// StackWalkCompPolicy - existing C2 policy
aoqi@0	122
aoqi@0	123	#ifdef COMPILER2
aoqi@0	124	class StackWalkCompPolicy : public NonTieredCompPolicy {
aoqi@0	125	public:
aoqi@0	126	virtual void method_invocation_event(methodHandle m, JavaThread* thread);
aoqi@0	127	virtual void method_back_branch_event(methodHandle m, int bci, JavaThread* thread);
aoqi@0	128
aoqi@0	129	private:
aoqi@0	130	RFrame* findTopInlinableFrame(GrowableArray<RFrame*>* stack);
aoqi@0	131	RFrame* senderOf(RFrame* rf, GrowableArray<RFrame*>* stack);
aoqi@0	132
aoqi@0	133	// the following variables hold values computed by the last inlining decision
aoqi@0	134	// they are used for performance debugging only (print better messages)
aoqi@0	135	static const char* _msg; // reason for not inlining
aoqi@0	136
aoqi@0	137	static const char* shouldInline (methodHandle callee, float frequency, int cnt);
aoqi@0	138	// positive filter: should send be inlined? returns NULL (--> yes) or rejection msg
aoqi@0	139	static const char* shouldNotInline(methodHandle callee);
aoqi@0	140	// negative filter: should send NOT be inlined? returns NULL (--> inline) or rejection msg
aoqi@0	141
aoqi@0	142	};
aoqi@0	143	#endif
aoqi@0	144
aoqi@0	145	#endif // SHARE_VM_RUNTIME_COMPILATIONPOLICY_HPP