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src/share/vm/runtime/vframe_hp.hpp@9987d9d5eb0e (annotated)

src/share/vm/runtime/vframe_hp.hpp

Fri, 31 Jul 2009 17:12:33 -0700

author

cfang

date

Fri, 31 Jul 2009 17:12:33 -0700

changeset 1335

9987d9d5eb0e

parent 435

a61af66fc99e

child 1383

89e0543e1737

permissions

-rw-r--r--

6833129: specjvm98 fails with NullPointerException in the compiler with -XX:DeoptimizeALot
Summary: developed a reexecute logic for the interpreter to reexecute the bytecode when deopt happens
Reviewed-by: kvn, never, jrose, twisti

duke@435	1	/*
duke@435	2	* Copyright 1997-2006 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	class compiledVFrame: public javaVFrame {
duke@435	26	public:
duke@435	27	// JVM state
cfang@1335	28	methodOop method() const;
cfang@1335	29	int bci() const;
cfang@1335	30	bool should_reexecute() const;
cfang@1335	31	StackValueCollection* locals() const;
cfang@1335	32	StackValueCollection* expressions() const;
cfang@1335	33	GrowableArray<MonitorInfo*>* monitors() const;
duke@435	34
duke@435	35	void set_locals(StackValueCollection* values) const;
duke@435	36
duke@435	37	// Virtuals defined in vframe
duke@435	38	bool is_compiled_frame() const { return true; }
duke@435	39	vframe* sender() const;
duke@435	40	bool is_top() const;
duke@435	41
duke@435	42	// Casting
duke@435	43	static compiledVFrame* cast(vframe* vf) {
duke@435	44	assert(vf == NULL || vf->is_compiled_frame(), "must be compiled frame");
duke@435	45	return (compiledVFrame*) vf;
duke@435	46	}
duke@435	47
duke@435	48	public:
duke@435	49	// Constructors
duke@435	50	compiledVFrame(const frame* fr, const RegisterMap* reg_map, JavaThread* thread, nmethod* nm);
duke@435	51
duke@435	52	// Update a local in a compiled frame. Update happens when deopt occurs
duke@435	53	void update_local(BasicType type, int index, jvalue value);
duke@435	54
duke@435	55	// Returns the active nmethod
duke@435	56	nmethod* code() const;
duke@435	57
duke@435	58	// Returns the scopeDesc
duke@435	59	ScopeDesc* scope() const { return _scope; }
duke@435	60
duke@435	61	// Returns SynchronizationEntryBCI or bci() (used for synchronization)
duke@435	62	int raw_bci() const;
duke@435	63
duke@435	64	protected:
duke@435	65	ScopeDesc* _scope;
duke@435	66
duke@435	67
duke@435	68	//StackValue resolve(ScopeValue* sv) const;
duke@435	69	BasicLock* resolve_monitor_lock(Location location) const;
duke@435	70	StackValue *create_stack_value(ScopeValue *sv) const;
duke@435	71
duke@435	72	private:
duke@435	73	compiledVFrame(const frame* fr, const RegisterMap* reg_map, JavaThread* thread, ScopeDesc* scope);
duke@435	74
duke@435	75	#ifndef PRODUCT
duke@435	76	public:
duke@435	77	void verify() const;
duke@435	78	#endif
duke@435	79	};
duke@435	80
duke@435	81	// In order to implement set_locals for compiled vframes we must
duke@435	82	// store updated locals in a data structure that contains enough
duke@435	83	// information to recognize equality with a vframe and to store
duke@435	84	// any updated locals.
duke@435	85
duke@435	86	class jvmtiDeferredLocalVariable;
duke@435	87	class jvmtiDeferredLocalVariableSet : public CHeapObj {
duke@435	88	private:
duke@435	89
duke@435	90	methodOop _method; // must be GC'd
duke@435	91	int _bci;
duke@435	92	intptr_t* _id;
duke@435	93	GrowableArray<jvmtiDeferredLocalVariable*>* _locals;
duke@435	94
duke@435	95	public:
duke@435	96	// JVM state
duke@435	97	methodOop method() const { return _method; }
duke@435	98	int bci() const { return _bci; }
duke@435	99	intptr_t* id() const { return _id; }
duke@435	100	GrowableArray<jvmtiDeferredLocalVariable*>* locals() const { return _locals; }
duke@435	101	void set_local_at(int idx, BasicType typ, jvalue val);
duke@435	102
duke@435	103	// Does the vframe match this jvmtiDeferredLocalVariableSet
duke@435	104	bool matches(vframe* vf);
duke@435	105	// GC
duke@435	106	void oops_do(OopClosure* f);
duke@435	107
duke@435	108	// constructor
duke@435	109	jvmtiDeferredLocalVariableSet(methodOop method, int bci, intptr_t* id);
duke@435	110
duke@435	111	// destructor
duke@435	112	~jvmtiDeferredLocalVariableSet();
duke@435	113
duke@435	114
duke@435	115	};
duke@435	116
duke@435	117	class jvmtiDeferredLocalVariable : public CHeapObj {
duke@435	118	public:
duke@435	119
duke@435	120	jvmtiDeferredLocalVariable(int index, BasicType type, jvalue value);
duke@435	121
duke@435	122	BasicType type(void) { return _type; }
duke@435	123	int index(void) { return _index; }
duke@435	124	jvalue value(void) { return _value; }
duke@435	125	// Only mutator is for value as only it can change
duke@435	126	void set_value(jvalue value) { _value = value; }
duke@435	127	// For gc
duke@435	128	oop* oop_addr(void) { return (oop*) &_value.l; }
duke@435	129
duke@435	130	private:
duke@435	131
duke@435	132	BasicType _type;
duke@435	133	jvalue _value;
duke@435	134	int _index;
duke@435	135
duke@435	136	};