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src/share/vm/runtime/compilationPolicy.hpp@9f4457a14b58 (annotated)

src/share/vm/runtime/compilationPolicy.hpp

Wed, 09 Apr 2008 15:10:22 -0700

author

rasbold

date

Wed, 09 Apr 2008 15:10:22 -0700

changeset 544

9f4457a14b58

parent 435

a61af66fc99e

child 1907

c18cbe5936b8

permissions

-rw-r--r--

Merge

duke@435	1	/*
duke@435	2	* Copyright 2000-2006 Sun Microsystems, Inc. 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	*
duke@435	19	* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
duke@435	20	* CA 95054 USA or visit www.sun.com if you need additional information or
duke@435	21	* have any questions.
duke@435	22	*
duke@435	23	*/
duke@435	24
duke@435	25	// The CompilationPolicy selects which method (if any) should be compiled.
duke@435	26	// It also decides which methods must always be compiled (i.e., are never
duke@435	27	// interpreted).
duke@435	28
duke@435	29	class CompilationPolicy : public CHeapObj {
duke@435	30	private:
duke@435	31	static CompilationPolicy* _policy;
duke@435	32	// Accumulated time
duke@435	33	static elapsedTimer _accumulated_time;
duke@435	34
duke@435	35	static bool _in_vm_startup;
duke@435	36
duke@435	37	public:
duke@435	38	virtual void method_invocation_event(methodHandle m, TRAPS) = 0;
duke@435	39	virtual void method_back_branch_event(methodHandle m, int branch_bci, int loop_top_bci, TRAPS) = 0;
duke@435	40	virtual int compilation_level(methodHandle m, int branch_bci) = 0;
duke@435	41
duke@435	42	void reset_counter_for_invocation_event(methodHandle method);
duke@435	43	void reset_counter_for_back_branch_event(methodHandle method);
duke@435	44
duke@435	45	static void set_in_vm_startup(bool in_vm_startup) { _in_vm_startup = in_vm_startup; }
duke@435	46	static void completed_vm_startup();
duke@435	47	static bool delayCompilationDuringStartup() { return _in_vm_startup; }
duke@435	48
duke@435	49	static bool mustBeCompiled(methodHandle m); // m must be compiled before executing it
duke@435	50	static bool canBeCompiled(methodHandle m); // m is allowed to be compiled
duke@435	51
duke@435	52	static void set_policy(CompilationPolicy* policy) { _policy = policy; }
duke@435	53	static CompilationPolicy* policy() { return _policy; }
duke@435	54
duke@435	55	// Profiling
duke@435	56	elapsedTimer* accumulated_time() { return &_accumulated_time; }
duke@435	57	void print_time() PRODUCT_RETURN;
duke@435	58	};
duke@435	59
duke@435	60	class SimpleCompPolicy : public CompilationPolicy {
duke@435	61	public:
duke@435	62	void method_invocation_event( methodHandle m, TRAPS);
duke@435	63	void method_back_branch_event(methodHandle m, int branch_bci, int loop_top_bci, TRAPS);
duke@435	64	int compilation_level(methodHandle m, int branch_bci);
duke@435	65	};
duke@435	66
duke@435	67	// StackWalkCompPolicy - existing C2 policy
duke@435	68
duke@435	69	#ifdef COMPILER2
duke@435	70	class StackWalkCompPolicy : public CompilationPolicy {
duke@435	71	public:
duke@435	72	void method_invocation_event(methodHandle m, TRAPS);
duke@435	73	void method_back_branch_event(methodHandle m, int branch_bci, int loop_top_bci, TRAPS);
duke@435	74	int compilation_level(methodHandle m, int branch_bci);
duke@435	75
duke@435	76	private:
duke@435	77	RFrame* findTopInlinableFrame(GrowableArray<RFrame*>* stack);
duke@435	78	RFrame* senderOf(RFrame* rf, GrowableArray<RFrame*>* stack);
duke@435	79
duke@435	80	// the following variables hold values computed by the last inlining decision
duke@435	81	// they are used for performance debugging only (print better messages)
duke@435	82	static const char* _msg; // reason for not inlining
duke@435	83
duke@435	84	static const char* shouldInline (methodHandle callee, float frequency, int cnt);
duke@435	85	// positive filter: should send be inlined? returns NULL (--> yes) or rejection msg
duke@435	86	static const char* shouldNotInline(methodHandle callee);
duke@435	87	// negative filter: should send NOT be inlined? returns NULL (--> inline) or rejection msg
duke@435	88
duke@435	89	};
duke@435	90	#endif