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src/share/vm/interpreter/abstractInterpreter.hpp@ab102d5d923e (annotated)

src/share/vm/interpreter/abstractInterpreter.hpp

Sun, 23 May 2010 01:38:26 -0700

author

jrose

date

Sun, 23 May 2010 01:38:26 -0700

changeset 1920

ab102d5d923e

parent 1861

2338d41fbd81

child 1907

c18cbe5936b8

permissions

-rw-r--r--

6939207: refactor constant pool index processing
Summary: Factored cleanup of instruction decode which prepares for enhanced ldc semantics.
Reviewed-by: twisti

duke@435	1	/*
never@1609	2	* Copyright 1997-2010 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
twisti@1040	25	// This file contains the platform-independent parts
duke@435	26	// of the abstract interpreter and the abstract interpreter generator.
duke@435	27
duke@435	28	// Organization of the interpreter(s). There exists two different interpreters in hotpot
duke@435	29	// an assembly language version (aka template interpreter) and a high level language version
duke@435	30	// (aka c++ interpreter). Th division of labor is as follows:
duke@435	31
duke@435	32	// Template Interpreter C++ Interpreter Functionality
duke@435	33	//
duke@435	34	// templateTable* bytecodeInterpreter* actual interpretation of bytecodes
duke@435	35	//
duke@435	36	// templateInterpreter* cppInterpreter* generation of assembly code that creates
duke@435	37	// and manages interpreter runtime frames.
duke@435	38	// Also code for populating interpreter
duke@435	39	// frames created during deoptimization.
duke@435	40	//
duke@435	41	// For both template and c++ interpreter. There are common files for aspects of the interpreter
duke@435	42	// that are generic to both interpreters. This is the layout:
duke@435	43	//
duke@435	44	// abstractInterpreter.hpp: generic description of the interpreter.
duke@435	45	// interpreter*: generic frame creation and handling.
duke@435	46	//
duke@435	47
duke@435	48	//------------------------------------------------------------------------------------------------------------------------
duke@435	49	// The C++ interface to the bytecode interpreter(s).
duke@435	50
duke@435	51	class AbstractInterpreter: AllStatic {
duke@435	52	friend class VMStructs;
duke@435	53	friend class Interpreter;
duke@435	54	friend class CppInterpreterGenerator;
duke@435	55	public:
duke@435	56	enum MethodKind {
duke@435	57	zerolocals, // method needs locals initialization
duke@435	58	zerolocals_synchronized, // method needs locals initialization & is synchronized
duke@435	59	native, // native method
duke@435	60	native_synchronized, // native method & is synchronized
duke@435	61	empty, // empty method (code: _return)
duke@435	62	accessor, // accessor method (code: _aload_0, _getfield, _(a|i)return)
duke@435	63	abstract, // abstract method (throws an AbstractMethodException)
jrose@1145	64	method_handle, // java.dyn.MethodHandles::invoke
duke@435	65	java_lang_math_sin, // implementation of java.lang.Math.sin (x)
duke@435	66	java_lang_math_cos, // implementation of java.lang.Math.cos (x)
duke@435	67	java_lang_math_tan, // implementation of java.lang.Math.tan (x)
duke@435	68	java_lang_math_abs, // implementation of java.lang.Math.abs (x)
duke@435	69	java_lang_math_sqrt, // implementation of java.lang.Math.sqrt (x)
duke@435	70	java_lang_math_log, // implementation of java.lang.Math.log (x)
duke@435	71	java_lang_math_log10, // implementation of java.lang.Math.log10 (x)
duke@435	72	number_of_method_entries,
duke@435	73	invalid = -1
duke@435	74	};
duke@435	75
duke@435	76	enum SomeConstants {
duke@435	77	number_of_result_handlers = 10 // number of result handlers for native calls
duke@435	78	};
duke@435	79
duke@435	80	protected:
duke@435	81	static StubQueue* _code; // the interpreter code (codelets)
duke@435	82
duke@435	83	static bool _notice_safepoints; // true if safepoints are activated
duke@435	84
duke@435	85	static address _native_entry_begin; // Region for native entry code
duke@435	86	static address _native_entry_end;
duke@435	87
duke@435	88	// method entry points
duke@435	89	static address _entry_table[number_of_method_entries]; // entry points for a given method
duke@435	90	static address _native_abi_to_tosca[number_of_result_handlers]; // for native method result handlers
duke@435	91	static address _slow_signature_handler; // the native method generic (slow) signature handler
duke@435	92
duke@435	93	static address _rethrow_exception_entry; // rethrows an activation in previous frame
duke@435	94
duke@435	95	friend class AbstractInterpreterGenerator;
duke@435	96	friend class InterpreterGenerator;
duke@435	97	friend class InterpreterMacroAssembler;
duke@435	98
duke@435	99	public:
duke@435	100	// Initialization/debugging
duke@435	101	static void initialize();
duke@435	102	static StubQueue* code() { return _code; }
duke@435	103
duke@435	104
duke@435	105	// Method activation
duke@435	106	static MethodKind method_kind(methodHandle m);
duke@435	107	static address entry_for_kind(MethodKind k) { assert(0 <= k && k < number_of_method_entries, "illegal kind"); return _entry_table[k]; }
duke@435	108	static address entry_for_method(methodHandle m) { return _entry_table[method_kind(m)]; }
duke@435	109
duke@435	110	static void print_method_kind(MethodKind kind) PRODUCT_RETURN;
duke@435	111
never@1609	112	static bool can_be_compiled(methodHandle m);
never@1609	113
duke@435	114	// Runtime support
duke@435	115
duke@435	116	// length = invoke bytecode length (to advance to next bytecode)
duke@435	117	static address deopt_entry (TosState state, int length) { ShouldNotReachHere(); return NULL; }
duke@435	118	static address return_entry (TosState state, int length) { ShouldNotReachHere(); return NULL; }
duke@435	119
duke@435	120	static address rethrow_exception_entry() { return _rethrow_exception_entry; }
duke@435	121
duke@435	122	// Activation size in words for a method that is just being called.
duke@435	123	// Parameters haven't been pushed so count them too.
duke@435	124	static int size_top_interpreter_activation(methodOop method);
duke@435	125
duke@435	126	// Deoptimization support
cfang@1335	127	// Compute the entry address for continuation after
cfang@1335	128	static address deopt_continue_after_entry(methodOop method,
cfang@1335	129	address bcp,
cfang@1335	130	int callee_parameters,
cfang@1335	131	bool is_top_frame);
cfang@1335	132	// Compute the entry address for reexecution
cfang@1335	133	static address deopt_reexecute_entry(methodOop method, address bcp);
cfang@1335	134	// Deoptimization should reexecute this bytecode
cfang@1335	135	static bool bytecode_should_reexecute(Bytecodes::Code code);
duke@435	136
duke@435	137	// share implementation of size_activation and layout_activation:
duke@435	138	static int size_activation(methodOop method,
duke@435	139	int temps,
duke@435	140	int popframe_args,
duke@435	141	int monitors,
duke@435	142	int callee_params,
duke@435	143	int callee_locals,
duke@435	144	bool is_top_frame);
duke@435	145
duke@435	146	static int layout_activation(methodOop method,
duke@435	147	int temps,
duke@435	148	int popframe_args,
duke@435	149	int monitors,
duke@435	150	int callee_params,
duke@435	151	int callee_locals,
duke@435	152	frame* caller,
duke@435	153	frame* interpreter_frame,
duke@435	154	bool is_top_frame);
duke@435	155
duke@435	156	// Runtime support
duke@435	157	static bool is_not_reached( methodHandle method, int bci);
duke@435	158	// Safepoint support
duke@435	159	static void notice_safepoints() { ShouldNotReachHere(); } // stops the thread when reaching a safepoint
duke@435	160	static void ignore_safepoints() { ShouldNotReachHere(); } // ignores safepoints
duke@435	161
duke@435	162	// Support for native calls
duke@435	163	static address slow_signature_handler() { return _slow_signature_handler; }
duke@435	164	static address result_handler(BasicType type) { return _native_abi_to_tosca[BasicType_as_index(type)]; }
duke@435	165	static int BasicType_as_index(BasicType type); // computes index into result_handler_by_index table
duke@435	166	static bool in_native_entry(address pc) { return _native_entry_begin <= pc && pc < _native_entry_end; }
duke@435	167	// Debugging/printing
duke@435	168	static void print(); // prints the interpreter code
duke@435	169
duke@435	170	public:
twisti@1861	171	// Interpreter helpers
twisti@1861	172	const static int stackElementWords = 1;
twisti@1861	173	const static int stackElementSize = stackElementWords * wordSize;
twisti@1861	174	const static int logStackElementSize = LogBytesPerWord;
duke@435	175
duke@435	176	// Local values relative to locals[n]
duke@435	177	static int local_offset_in_bytes(int n) {
twisti@1861	178	return ((frame::interpreter_frame_expression_stack_direction() * n) * stackElementSize);
duke@435	179	}
duke@435	180
jrose@1161	181	// access to stacked values according to type:
jrose@1161	182	static oop* oop_addr_in_slot(intptr_t* slot_addr) {
jrose@1161	183	return (oop*) slot_addr;
jrose@1161	184	}
jrose@1161	185	static jint* int_addr_in_slot(intptr_t* slot_addr) {
jrose@1161	186	if ((int) sizeof(jint) < wordSize && !Bytes::is_Java_byte_ordering_different())
jrose@1161	187	// big-endian LP64
jrose@1161	188	return (jint*)(slot_addr + 1) - 1;
jrose@1161	189	else
jrose@1161	190	return (jint*) slot_addr;
jrose@1161	191	}
jrose@1161	192	static jlong long_in_slot(intptr_t* slot_addr) {
jrose@1161	193	if (sizeof(intptr_t) >= sizeof(jlong)) {
jrose@1161	194	return *(jlong*) slot_addr;
twisti@1861	195	} else {
jrose@1161	196	return Bytes::get_native_u8((address)slot_addr);
jrose@1161	197	}
jrose@1161	198	}
jrose@1161	199	static void set_long_in_slot(intptr_t* slot_addr, jlong value) {
jrose@1161	200	if (sizeof(intptr_t) >= sizeof(jlong)) {
jrose@1161	201	*(jlong*) slot_addr = value;
twisti@1861	202	} else {
jrose@1161	203	Bytes::put_native_u8((address)slot_addr, value);
jrose@1161	204	}
jrose@1161	205	}
jrose@1161	206	static void get_jvalue_in_slot(intptr_t* slot_addr, BasicType type, jvalue* value) {
jrose@1161	207	switch (type) {
jrose@1161	208	case T_BOOLEAN: value->z = *int_addr_in_slot(slot_addr); break;
jrose@1161	209	case T_CHAR: value->c = *int_addr_in_slot(slot_addr); break;
jrose@1161	210	case T_BYTE: value->b = *int_addr_in_slot(slot_addr); break;
jrose@1161	211	case T_SHORT: value->s = *int_addr_in_slot(slot_addr); break;
jrose@1161	212	case T_INT: value->i = *int_addr_in_slot(slot_addr); break;
jrose@1161	213	case T_LONG: value->j = long_in_slot(slot_addr); break;
jrose@1161	214	case T_FLOAT: value->f = *(jfloat*)int_addr_in_slot(slot_addr); break;
jrose@1161	215	case T_DOUBLE: value->d = jdouble_cast(long_in_slot(slot_addr)); break;
jrose@1161	216	case T_OBJECT: value->l = (jobject)*oop_addr_in_slot(slot_addr); break;
jrose@1161	217	default: ShouldNotReachHere();
jrose@1161	218	}
jrose@1161	219	}
jrose@1161	220	static void set_jvalue_in_slot(intptr_t* slot_addr, BasicType type, jvalue* value) {
jrose@1161	221	switch (type) {
jrose@1161	222	case T_BOOLEAN: *int_addr_in_slot(slot_addr) = (value->z != 0); break;
jrose@1161	223	case T_CHAR: *int_addr_in_slot(slot_addr) = value->c; break;
jrose@1161	224	case T_BYTE: *int_addr_in_slot(slot_addr) = value->b; break;
jrose@1161	225	case T_SHORT: *int_addr_in_slot(slot_addr) = value->s; break;
jrose@1161	226	case T_INT: *int_addr_in_slot(slot_addr) = value->i; break;
jrose@1161	227	case T_LONG: set_long_in_slot(slot_addr, value->j); break;
jrose@1161	228	case T_FLOAT: *(jfloat*)int_addr_in_slot(slot_addr) = value->f; break;
jrose@1161	229	case T_DOUBLE: set_long_in_slot(slot_addr, jlong_cast(value->d)); break;
jrose@1161	230	case T_OBJECT: *oop_addr_in_slot(slot_addr) = (oop) value->l; break;
jrose@1161	231	default: ShouldNotReachHere();
jrose@1161	232	}
jrose@1161	233	}
duke@435	234	};
duke@435	235
duke@435	236	//------------------------------------------------------------------------------------------------------------------------
duke@435	237	// The interpreter generator.
duke@435	238
duke@435	239	class Template;
duke@435	240	class AbstractInterpreterGenerator: public StackObj {
duke@435	241	protected:
duke@435	242	InterpreterMacroAssembler* _masm;
duke@435	243
duke@435	244	// shared code sequences
duke@435	245	// Converter for native abi result to tosca result
duke@435	246	address generate_result_handler_for(BasicType type);
duke@435	247	address generate_slow_signature_handler();
duke@435	248
duke@435	249	// entry point generator
duke@435	250	address generate_method_entry(AbstractInterpreter::MethodKind kind);
duke@435	251
duke@435	252	void bang_stack_shadow_pages(bool native_call);
duke@435	253
duke@435	254	void generate_all();
duke@435	255
duke@435	256	public:
duke@435	257	AbstractInterpreterGenerator(StubQueue* _code);
duke@435	258	};