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src/share/vm/runtime/vframe_hp.hpp@2b42b31e7928 (annotated)

src/share/vm/runtime/vframe_hp.hpp

Fri, 21 Nov 2008 08:09:11 -0800

author

coleenp

date

Fri, 21 Nov 2008 08:09:11 -0800

changeset 882

2b42b31e7928

parent 435

a61af66fc99e

child 1335

9987d9d5eb0e

permissions

-rw-r--r--

6676175: BigApps crash JVM Client VM (build 10.0-b22, mixed mode, sharing) with SIGSEGV (0xb)
Summary: Add test for biased locking epoch before walking own thread stack in case of rare race
Reviewed-by: phh, never

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