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src/share/vm/runtime/javaCalls.hpp@0715f0cf171d (annotated)

src/share/vm/runtime/javaCalls.hpp

Fri, 08 Oct 2010 09:29:09 -0700

author

jcoomes

date

Fri, 08 Oct 2010 09:29:09 -0700

changeset 2198

0715f0cf171d

parent 1907

c18cbe5936b8

child 2314

f95d63e2154a

permissions

-rw-r--r--

Merge

duke@435	1	/*
trims@1907	2	* Copyright (c) 1997, 2008, 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
duke@435	25	// A JavaCallWrapper is constructed before each JavaCall and destructed after the call.
duke@435	26	// Its purpose is to allocate/deallocate a new handle block and to save/restore the last
duke@435	27	// Java fp/sp. A pointer to the JavaCallWrapper is stored on the stack.
duke@435	28
duke@435	29	class JavaCallWrapper: StackObj {
duke@435	30	friend class VMStructs;
duke@435	31	private:
duke@435	32	JavaThread* _thread; // the thread to which this call belongs
duke@435	33	JNIHandleBlock* _handles; // the saved handle block
duke@435	34	methodOop _callee_method; // to be able to collect arguments if entry frame is top frame
duke@435	35	oop _receiver; // the receiver of the call (if a non-static call)
duke@435	36
duke@435	37	JavaFrameAnchor _anchor; // last thread anchor state that we must restore
duke@435	38
duke@435	39	JavaValue* _result; // result value
duke@435	40
duke@435	41	public:
duke@435	42	// Construction/destruction
duke@435	43	JavaCallWrapper(methodHandle callee_method, Handle receiver, JavaValue* result, TRAPS);
duke@435	44	~JavaCallWrapper();
duke@435	45
duke@435	46	// Accessors
duke@435	47	JavaThread* thread() const { return _thread; }
duke@435	48	JNIHandleBlock* handles() const { return _handles; }
duke@435	49
duke@435	50	JavaFrameAnchor* anchor(void) { return &_anchor; }
duke@435	51
duke@435	52	JavaValue* result() const { return _result; }
duke@435	53	// GC support
duke@435	54	methodOop callee_method() { return _callee_method; }
duke@435	55	oop receiver() { return _receiver; }
duke@435	56	void oops_do(OopClosure* f);
duke@435	57
duke@435	58	};
duke@435	59
duke@435	60
duke@435	61	// Encapsulates arguments to a JavaCall (faster, safer, and more convenient than using var-args)
duke@435	62	class JavaCallArguments : public StackObj {
duke@435	63	private:
duke@435	64	enum Constants {
duke@435	65	_default_size = 8 // Must be at least # of arguments in JavaCalls methods
duke@435	66	};
duke@435	67
duke@435	68	intptr_t _value_buffer [_default_size + 1];
duke@435	69	bool _is_oop_buffer[_default_size + 1];
duke@435	70
duke@435	71	intptr_t* _value;
duke@435	72	bool* _is_oop;
duke@435	73	int _size;
duke@435	74	int _max_size;
duke@435	75	bool _start_at_zero; // Support late setting of receiver
duke@435	76
duke@435	77	void initialize() {
duke@435	78	// Starts at first element to support set_receiver.
duke@435	79	_value = &_value_buffer[1];
duke@435	80	_is_oop = &_is_oop_buffer[1];
duke@435	81
duke@435	82	_max_size = _default_size;
duke@435	83	_size = 0;
duke@435	84	_start_at_zero = false;
duke@435	85	}
duke@435	86
duke@435	87	public:
duke@435	88	JavaCallArguments() { initialize(); }
duke@435	89
duke@435	90	JavaCallArguments(Handle receiver) {
duke@435	91	initialize();
duke@435	92	push_oop(receiver);
duke@435	93	}
duke@435	94
duke@435	95	JavaCallArguments(int max_size) {
duke@435	96	if (max_size > _default_size) {
duke@435	97	_value = NEW_RESOURCE_ARRAY(intptr_t, max_size + 1);
duke@435	98	_is_oop = NEW_RESOURCE_ARRAY(bool, max_size + 1);
twisti@1861	99
duke@435	100	// Reserve room for potential receiver in value and is_oop
duke@435	101	_value++; _is_oop++;
twisti@1861	102
duke@435	103	_max_size = max_size;
duke@435	104	_size = 0;
duke@435	105	_start_at_zero = false;
duke@435	106	} else {
duke@435	107	initialize();
duke@435	108	}
duke@435	109	}
duke@435	110
duke@435	111	inline void push_oop(Handle h) { _is_oop[_size] = true;
duke@435	112	JNITypes::put_obj((oop)h.raw_value(), _value, _size); }
duke@435	113
duke@435	114	inline void push_int(int i) { _is_oop[_size] = false;
duke@435	115	JNITypes::put_int(i, _value, _size); }
duke@435	116
duke@435	117	inline void push_double(double d) { _is_oop[_size] = false; _is_oop[_size + 1] = false;
duke@435	118	JNITypes::put_double(d, _value, _size); }
duke@435	119
duke@435	120	inline void push_long(jlong l) { _is_oop[_size] = false; _is_oop[_size + 1] = false;
duke@435	121	JNITypes::put_long(l, _value, _size); }
duke@435	122
duke@435	123	inline void push_float(float f) { _is_oop[_size] = false;
duke@435	124	JNITypes::put_float(f, _value, _size); }
duke@435	125
duke@435	126	// receiver
duke@435	127	Handle receiver() {
duke@435	128	assert(_size > 0, "must at least be one argument");
duke@435	129	assert(_is_oop[0], "first argument must be an oop");
duke@435	130	assert(_value[0] != 0, "receiver must be not-null");
duke@435	131	return Handle((oop*)_value[0], false);
duke@435	132	}
duke@435	133
duke@435	134	void set_receiver(Handle h) {
duke@435	135	assert(_start_at_zero == false, "can only be called once");
duke@435	136	_start_at_zero = true;
duke@435	137	_is_oop--;
duke@435	138	_value--;
duke@435	139	_size++;
duke@435	140	_is_oop[0] = true;
duke@435	141	_value[0] = (intptr_t)h.raw_value();
duke@435	142	}
duke@435	143
duke@435	144	// Converts all Handles to oops, and returns a reference to parameter vector
duke@435	145	intptr_t* parameters() ;
duke@435	146	int size_of_parameters() const { return _size; }
duke@435	147
duke@435	148	// Verify that pushed arguments fits a given method
poonam@900	149	void verify(methodHandle method, BasicType return_type, Thread *thread);
duke@435	150	};
duke@435	151
duke@435	152	// All calls to Java have to go via JavaCalls. Sets up the stack frame
duke@435	153	// and makes sure that the last_Java_frame pointers are chained correctly.
duke@435	154	//
duke@435	155
duke@435	156	class JavaCalls: AllStatic {
duke@435	157	static void call_helper(JavaValue* result, methodHandle* method, JavaCallArguments* args, TRAPS);
duke@435	158	public:
duke@435	159	// Optimized Constuctor call
duke@435	160	static void call_default_constructor(JavaThread* thread, methodHandle method, Handle receiver, TRAPS);
duke@435	161
duke@435	162	// call_special
duke@435	163	// ------------
duke@435	164	// The receiver must be first oop in argument list
duke@435	165	static void call_special(JavaValue* result, KlassHandle klass, symbolHandle name, symbolHandle signature, JavaCallArguments* args, TRAPS);
duke@435	166
duke@435	167	static void call_special(JavaValue* result, Handle receiver, KlassHandle klass, symbolHandle name, symbolHandle signature, TRAPS); // No args
duke@435	168	static void call_special(JavaValue* result, Handle receiver, KlassHandle klass, symbolHandle name, symbolHandle signature, Handle arg1, TRAPS);
duke@435	169	static void call_special(JavaValue* result, Handle receiver, KlassHandle klass, symbolHandle name, symbolHandle signature, Handle arg1, Handle arg2, TRAPS);
duke@435	170
duke@435	171	// virtual call
duke@435	172	// ------------
duke@435	173
duke@435	174	// The receiver must be first oop in argument list
duke@435	175	static void call_virtual(JavaValue* result, KlassHandle spec_klass, symbolHandle name, symbolHandle signature, JavaCallArguments* args, TRAPS);
duke@435	176
duke@435	177	static void call_virtual(JavaValue* result, Handle receiver, KlassHandle spec_klass, symbolHandle name, symbolHandle signature, TRAPS); // No args
duke@435	178	static void call_virtual(JavaValue* result, Handle receiver, KlassHandle spec_klass, symbolHandle name, symbolHandle signature, Handle arg1, TRAPS);
duke@435	179	static void call_virtual(JavaValue* result, Handle receiver, KlassHandle spec_klass, symbolHandle name, symbolHandle signature, Handle arg1, Handle arg2, TRAPS);
duke@435	180
duke@435	181	// Static call
duke@435	182	// -----------
duke@435	183	static void call_static(JavaValue* result, KlassHandle klass, symbolHandle name, symbolHandle signature, JavaCallArguments* args, TRAPS);
duke@435	184
duke@435	185	static void call_static(JavaValue* result, KlassHandle klass, symbolHandle name, symbolHandle signature, TRAPS);
duke@435	186	static void call_static(JavaValue* result, KlassHandle klass, symbolHandle name, symbolHandle signature, Handle arg1, TRAPS);
duke@435	187	static void call_static(JavaValue* result, KlassHandle klass, symbolHandle name, symbolHandle signature, Handle arg1, Handle arg2, TRAPS);
duke@435	188
duke@435	189	// Low-level interface
duke@435	190	static void call(JavaValue* result, methodHandle method, JavaCallArguments* args, TRAPS);
duke@435	191	};