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src/share/vm/oops/methodOop.hpp@a61af66fc99e (annotated)

src/share/vm/oops/methodOop.hpp

Sat, 01 Dec 2007 00:00:00 +0000

author

duke

date

Sat, 01 Dec 2007 00:00:00 +0000

changeset 435

a61af66fc99e

child 483

d8b3ef7ee3e5

permissions

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duke@435	1	/*
duke@435	2	* Copyright 1997-2007 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	// A methodOop represents a Java method.
duke@435	26	//
duke@435	27	// Memory layout (each line represents a word). Note that most applications load thousands of methods,
duke@435	28	// so keeping the size of this structure small has a big impact on footprint.
duke@435	29	//
duke@435	30	// We put all oops and method_size first for better gc cache locality.
duke@435	31	//
duke@435	32	// The actual bytecodes are inlined after the end of the methodOopDesc struct.
duke@435	33	//
duke@435	34	// There are bits in the access_flags telling whether inlined tables are present.
duke@435	35	// Note that accessing the line number and local variable tables is not performance critical at all.
duke@435	36	// Accessing the checked exceptions table is used by reflection, so we put that last to make access
duke@435	37	// to it fast.
duke@435	38	//
duke@435	39	// The line number table is compressed and inlined following the byte codes. It is found as the first
duke@435	40	// byte following the byte codes. The checked exceptions table and the local variable table are inlined
duke@435	41	// after the line number table, and indexed from the end of the method. We do not compress the checked
duke@435	42	// exceptions table since the average length is less than 2, and do not bother to compress the local
duke@435	43	// variable table either since it is mostly absent.
duke@435	44	//
duke@435	45	// Note that native_function and signature_handler has to be at fixed offsets (required by the interpreter)
duke@435	46	//
duke@435	47	// |------------------------------------------------------|
duke@435	48	// | header |
duke@435	49	// | klass |
duke@435	50	// |------------------------------------------------------|
duke@435	51	// | constMethodOop (oop) |
duke@435	52	// | constants (oop) |
duke@435	53	// |------------------------------------------------------|
duke@435	54	// | methodData (oop) |
duke@435	55	// | interp_invocation_count |
duke@435	56	// |------------------------------------------------------|
duke@435	57	// | access_flags |
duke@435	58	// | vtable_index |
duke@435	59	// |------------------------------------------------------|
duke@435	60	// | result_index (C++ interpreter only) |
duke@435	61	// |------------------------------------------------------|
duke@435	62	// | method_size | max_stack |
duke@435	63	// | max_locals | size_of_parameters |
duke@435	64	// |------------------------------------------------------|
duke@435	65	// | intrinsic_id, highest_tier | (unused) |
duke@435	66	// |------------------------------------------------------|
duke@435	67	// | throwout_count | num_breakpoints |
duke@435	68	// |------------------------------------------------------|
duke@435	69	// | invocation_counter |
duke@435	70	// | backedge_counter |
duke@435	71	// |------------------------------------------------------|
duke@435	72	// | code (pointer) |
duke@435	73	// | i2i (pointer) |
duke@435	74	// | adapter (pointer) |
duke@435	75	// | from_compiled_entry (pointer) |
duke@435	76	// | from_interpreted_entry (pointer) |
duke@435	77	// |------------------------------------------------------|
duke@435	78	// | native_function (present only if native) |
duke@435	79	// | signature_handler (present only if native) |
duke@435	80	// |------------------------------------------------------|
duke@435	81
duke@435	82
duke@435	83	class CheckedExceptionElement;
duke@435	84	class LocalVariableTableElement;
duke@435	85	class AdapterHandlerEntry;
duke@435	86
duke@435	87	class methodDataOopDesc;
duke@435	88
duke@435	89	class methodOopDesc : public oopDesc {
duke@435	90	friend class methodKlass;
duke@435	91	friend class VMStructs;
duke@435	92	private:
duke@435	93	constMethodOop _constMethod; // Method read-only data.
duke@435	94	constantPoolOop _constants; // Constant pool
duke@435	95	methodDataOop _method_data;
duke@435	96	int _interpreter_invocation_count; // Count of times invoked
duke@435	97	AccessFlags _access_flags; // Access flags
duke@435	98	int _vtable_index; // vtable index of this method (see VtableIndexFlag)
duke@435	99	// note: can have vtables with >2**16 elements (because of inheritance)
duke@435	100	#ifdef CC_INTERP
duke@435	101	int _result_index; // C++ interpreter needs for converting results to/from stack
duke@435	102	#endif
duke@435	103	u2 _method_size; // size of this object
duke@435	104	u2 _max_stack; // Maximum number of entries on the expression stack
duke@435	105	u2 _max_locals; // Number of local variables used by this method
duke@435	106	u2 _size_of_parameters; // size of the parameter block (receiver + arguments) in words
duke@435	107	u1 _intrinsic_id_cache; // Cache for intrinsic_id; 0 or 1+vmInt::ID
duke@435	108	u1 _highest_tier_compile; // Highest compile level this method has ever seen.
duke@435	109	u2 _interpreter_throwout_count; // Count of times method was exited via exception while interpreting
duke@435	110	u2 _number_of_breakpoints; // fullspeed debugging support
duke@435	111	InvocationCounter _invocation_counter; // Incremented before each activation of the method - used to trigger frequency-based optimizations
duke@435	112	InvocationCounter _backedge_counter; // Incremented before each backedge taken - used to trigger frequencey-based optimizations
duke@435	113	#ifndef PRODUCT
duke@435	114	int _compiled_invocation_count; // Number of nmethod invocations so far (for perf. debugging)
duke@435	115	#endif
duke@435	116	// Entry point for calling both from and to the interpreter.
duke@435	117	address _i2i_entry; // All-args-on-stack calling convention
duke@435	118	// Adapter blob (i2c/c2i) for this methodOop. Set once when method is linked.
duke@435	119	AdapterHandlerEntry* _adapter;
duke@435	120	// Entry point for calling from compiled code, to compiled code if it exists
duke@435	121	// or else the interpreter.
duke@435	122	volatile address _from_compiled_entry; // Cache of: _code ? _code->entry_point() : _adapter->c2i_entry()
duke@435	123	// The entry point for calling both from and to compiled code is
duke@435	124	// "_code->entry_point()". Because of tiered compilation and de-opt, this
duke@435	125	// field can come and go. It can transition from NULL to not-null at any
duke@435	126	// time (whenever a compile completes). It can transition from not-null to
duke@435	127	// NULL only at safepoints (because of a de-opt).
duke@435	128	nmethod* volatile _code; // Points to the corresponding piece of native code
duke@435	129	volatile address _from_interpreted_entry; // Cache of _code ? _adapter->i2c_entry() : _i2i_entry
duke@435	130
duke@435	131	public:
duke@435	132	// accessors for instance variables
duke@435	133	constMethodOop constMethod() const { return _constMethod; }
duke@435	134	void set_constMethod(constMethodOop xconst) { oop_store_without_check((oop*)&_constMethod, (oop)xconst); }
duke@435	135
duke@435	136
duke@435	137	static address make_adapters(methodHandle mh, TRAPS);
duke@435	138	volatile address from_compiled_entry() const { return (address)OrderAccess::load_ptr_acquire(&_from_compiled_entry); }
duke@435	139	volatile address from_interpreted_entry() const{ return (address)OrderAccess::load_ptr_acquire(&_from_interpreted_entry); }
duke@435	140
duke@435	141	// access flag
duke@435	142	AccessFlags access_flags() const { return _access_flags; }
duke@435	143	void set_access_flags(AccessFlags flags) { _access_flags = flags; }
duke@435	144
duke@435	145	// name
duke@435	146	symbolOop name() const { return _constants->symbol_at(name_index()); }
duke@435	147	int name_index() const { return constMethod()->name_index(); }
duke@435	148	void set_name_index(int index) { constMethod()->set_name_index(index); }
duke@435	149
duke@435	150	// signature
duke@435	151	symbolOop signature() const { return _constants->symbol_at(signature_index()); }
duke@435	152	int signature_index() const { return constMethod()->signature_index(); }
duke@435	153	void set_signature_index(int index) { constMethod()->set_signature_index(index); }
duke@435	154
duke@435	155	// generics support
duke@435	156	symbolOop generic_signature() const { int idx = generic_signature_index(); return ((idx != 0) ? _constants->symbol_at(idx) : (symbolOop)NULL); }
duke@435	157	int generic_signature_index() const { return constMethod()->generic_signature_index(); }
duke@435	158	void set_generic_signature_index(int index) { constMethod()->set_generic_signature_index(index); }
duke@435	159
duke@435	160	// annotations support
duke@435	161	typeArrayOop annotations() const { return instanceKlass::cast(method_holder())->get_method_annotations_of(method_idnum()); }
duke@435	162	typeArrayOop parameter_annotations() const { return instanceKlass::cast(method_holder())->get_method_parameter_annotations_of(method_idnum()); }
duke@435	163	typeArrayOop annotation_default() const { return instanceKlass::cast(method_holder())->get_method_default_annotations_of(method_idnum()); }
duke@435	164
duke@435	165	#ifdef CC_INTERP
duke@435	166	void set_result_index(BasicType type);
duke@435	167	int result_index() { return _result_index; }
duke@435	168	#endif
duke@435	169
duke@435	170	// Helper routine: get klass name + "." + method name + signature as
duke@435	171	// C string, for the purpose of providing more useful NoSuchMethodErrors
duke@435	172	// and fatal error handling. The string is allocated in resource
duke@435	173	// area if a buffer is not provided by the caller.
duke@435	174	char* name_and_sig_as_C_string();
duke@435	175	char* name_and_sig_as_C_string(char* buf, int size);
duke@435	176
duke@435	177	// Static routine in the situations we don't have a methodOop
duke@435	178	static char* name_and_sig_as_C_string(Klass* klass, symbolOop method_name, symbolOop signature);
duke@435	179	static char* name_and_sig_as_C_string(Klass* klass, symbolOop method_name, symbolOop signature, char* buf, int size);
duke@435	180
duke@435	181	// JVMTI breakpoints
duke@435	182	Bytecodes::Code orig_bytecode_at(int bci);
duke@435	183	void set_orig_bytecode_at(int bci, Bytecodes::Code code);
duke@435	184	void set_breakpoint(int bci);
duke@435	185	void clear_breakpoint(int bci);
duke@435	186	void clear_all_breakpoints();
duke@435	187	// Tracking number of breakpoints, for fullspeed debugging.
duke@435	188	// Only mutated by VM thread.
duke@435	189	u2 number_of_breakpoints() const { return _number_of_breakpoints; }
duke@435	190	void incr_number_of_breakpoints() { ++_number_of_breakpoints; }
duke@435	191	void decr_number_of_breakpoints() { --_number_of_breakpoints; }
duke@435	192	// Initialization only
duke@435	193	void clear_number_of_breakpoints() { _number_of_breakpoints = 0; }
duke@435	194
duke@435	195	// index into instanceKlass methods() array
duke@435	196	u2 method_idnum() const { return constMethod()->method_idnum(); }
duke@435	197	void set_method_idnum(u2 idnum) { constMethod()->set_method_idnum(idnum); }
duke@435	198
duke@435	199	// code size
duke@435	200	int code_size() const { return constMethod()->code_size(); }
duke@435	201
duke@435	202	// method size
duke@435	203	int method_size() const { return _method_size; }
duke@435	204	void set_method_size(int size) {
duke@435	205	assert(0 <= size && size < (1 << 16), "invalid method size");
duke@435	206	_method_size = size;
duke@435	207	}
duke@435	208
duke@435	209	// constant pool for klassOop holding this method
duke@435	210	constantPoolOop constants() const { return _constants; }
duke@435	211	void set_constants(constantPoolOop c) { oop_store_without_check((oop*)&_constants, c); }
duke@435	212
duke@435	213	// max stack
duke@435	214	int max_stack() const { return _max_stack; }
duke@435	215	void set_max_stack(int size) { _max_stack = size; }
duke@435	216
duke@435	217	// max locals
duke@435	218	int max_locals() const { return _max_locals; }
duke@435	219	void set_max_locals(int size) { _max_locals = size; }
duke@435	220	int highest_tier_compile() { return _highest_tier_compile;}
duke@435	221	void set_highest_tier_compile(int level) { _highest_tier_compile = level;}
duke@435	222
duke@435	223	void clear_intrinsic_id_cache() { _intrinsic_id_cache = 0; }
duke@435	224
duke@435	225	// Count of times method was exited via exception while interpreting
duke@435	226	void interpreter_throwout_increment() {
duke@435	227	if (_interpreter_throwout_count < 65534) {
duke@435	228	_interpreter_throwout_count++;
duke@435	229	}
duke@435	230	}
duke@435	231
duke@435	232	int interpreter_throwout_count() const { return _interpreter_throwout_count; }
duke@435	233	void set_interpreter_throwout_count(int count) { _interpreter_throwout_count = count; }
duke@435	234
duke@435	235	// size of parameters
duke@435	236	int size_of_parameters() const { return _size_of_parameters; }
duke@435	237
duke@435	238	bool has_stackmap_table() const {
duke@435	239	return constMethod()->has_stackmap_table();
duke@435	240	}
duke@435	241
duke@435	242	typeArrayOop stackmap_data() const {
duke@435	243	return constMethod()->stackmap_data();
duke@435	244	}
duke@435	245
duke@435	246	// exception handler table
duke@435	247	typeArrayOop exception_table() const
duke@435	248	{ return constMethod()->exception_table(); }
duke@435	249	void set_exception_table(typeArrayOop e)
duke@435	250	{ constMethod()->set_exception_table(e); }
duke@435	251	bool has_exception_handler() const
duke@435	252	{ return constMethod()->has_exception_handler(); }
duke@435	253
duke@435	254	// Finds the first entry point bci of an exception handler for an
duke@435	255	// exception of klass ex_klass thrown at throw_bci. A value of NULL
duke@435	256	// for ex_klass indicates that the exception klass is not known; in
duke@435	257	// this case it matches any constraint class. Returns -1 if the
duke@435	258	// exception cannot be handled in this method. The handler
duke@435	259	// constraint classes are loaded if necessary. Note that this may
duke@435	260	// throw an exception if loading of the constraint classes causes
duke@435	261	// an IllegalAccessError (bugid 4307310) or an OutOfMemoryError.
duke@435	262	// If an exception is thrown, returns the bci of the
duke@435	263	// exception handler which caused the exception to be thrown, which
duke@435	264	// is needed for proper retries. See, for example,
duke@435	265	// InterpreterRuntime::exception_handler_for_exception.
duke@435	266	int fast_exception_handler_bci_for(KlassHandle ex_klass, int throw_bci, TRAPS);
duke@435	267
duke@435	268	// method data access
duke@435	269	methodDataOop method_data() const {
duke@435	270	return _method_data;
duke@435	271	}
duke@435	272	void set_method_data(methodDataOop data) {
duke@435	273	oop_store_without_check((oop*)&_method_data, (oop)data);
duke@435	274	}
duke@435	275
duke@435	276	// invocation counter
duke@435	277	InvocationCounter* invocation_counter() { return &_invocation_counter; }
duke@435	278	InvocationCounter* backedge_counter() { return &_backedge_counter; }
duke@435	279	int invocation_count() const { return _invocation_counter.count(); }
duke@435	280	int backedge_count() const { return _backedge_counter.count(); }
duke@435	281	bool was_executed_more_than(int n) const;
duke@435	282	bool was_never_executed() const { return !was_executed_more_than(0); }
duke@435	283
duke@435	284	static void build_interpreter_method_data(methodHandle method, TRAPS);
duke@435	285
duke@435	286	int interpreter_invocation_count() const { return _interpreter_invocation_count; }
duke@435	287	void set_interpreter_invocation_count(int count) { _interpreter_invocation_count = count; }
duke@435	288	int increment_interpreter_invocation_count() { return ++_interpreter_invocation_count; }
duke@435	289
duke@435	290	#ifndef PRODUCT
duke@435	291	int compiled_invocation_count() const { return _compiled_invocation_count; }
duke@435	292	void set_compiled_invocation_count(int count) { _compiled_invocation_count = count; }
duke@435	293	#endif // not PRODUCT
duke@435	294
duke@435	295	// Clear (non-shared space) pointers which could not be relevent
duke@435	296	// if this (shared) method were mapped into another JVM.
duke@435	297	void remove_unshareable_info();
duke@435	298
duke@435	299	// nmethod/verified compiler entry
duke@435	300	address verified_code_entry();
duke@435	301	bool check_code() const; // Not inline to avoid circular ref
duke@435	302	nmethod* volatile code() const { assert( check_code(), "" ); return (nmethod *)OrderAccess::load_ptr_acquire(&_code); }
duke@435	303	void clear_code(); // Clear out any compiled code
duke@435	304	void set_code(methodHandle mh, nmethod* code);
duke@435	305	void set_adapter_entry(AdapterHandlerEntry* adapter) { _adapter = adapter; }
duke@435	306	address get_i2c_entry();
duke@435	307	address get_c2i_entry();
duke@435	308	address get_c2i_unverified_entry();
duke@435	309	AdapterHandlerEntry* adapter() { return _adapter; }
duke@435	310	// setup entry points
duke@435	311	void link_method(methodHandle method, TRAPS);
duke@435	312	// clear entry points. Used by sharing code
duke@435	313	void unlink_method();
duke@435	314
duke@435	315	// vtable index
duke@435	316	enum VtableIndexFlag {
duke@435	317	// Valid vtable indexes are non-negative (>= 0).
duke@435	318	// These few negative values are used as sentinels.
duke@435	319	invalid_vtable_index = -4, // distinct from any valid vtable index
duke@435	320	garbage_vtable_index = -3, // not yet linked; no vtable layout yet
duke@435	321	nonvirtual_vtable_index = -2 // there is no need for vtable dispatch
duke@435	322	// 6330203 Note: Do not use -1, which was overloaded with many meanings.
duke@435	323	};
duke@435	324	DEBUG_ONLY(bool valid_vtable_index() const { return _vtable_index >= nonvirtual_vtable_index; })
duke@435	325	int vtable_index() const { assert(valid_vtable_index(), "");
duke@435	326	return _vtable_index; }
duke@435	327	void set_vtable_index(int index) { _vtable_index = index; }
duke@435	328
duke@435	329	// interpreter entry
duke@435	330	address interpreter_entry() const { return _i2i_entry; }
duke@435	331	// Only used when first initialize so we can set _i2i_entry and _from_interpreted_entry
duke@435	332	void set_interpreter_entry(address entry) { _i2i_entry = entry; _from_interpreted_entry = entry; }
duke@435	333	int interpreter_kind(void) {
duke@435	334	return constMethod()->interpreter_kind();
duke@435	335	}
duke@435	336	void set_interpreter_kind();
duke@435	337	void set_interpreter_kind(int kind) {
duke@435	338	constMethod()->set_interpreter_kind(kind);
duke@435	339	}
duke@435	340
duke@435	341	// native function (used for native methods only)
duke@435	342	enum {
duke@435	343	native_bind_event_is_interesting = true
duke@435	344	};
duke@435	345	address native_function() const { return *(native_function_addr()); }
duke@435	346	// Must specify a real function (not NULL).
duke@435	347	// Use clear_native_function() to unregister.
duke@435	348	void set_native_function(address function, bool post_event_flag);
duke@435	349	bool has_native_function() const;
duke@435	350	void clear_native_function();
duke@435	351
duke@435	352	// signature handler (used for native methods only)
duke@435	353	address signature_handler() const { return *(signature_handler_addr()); }
duke@435	354	void set_signature_handler(address handler);
duke@435	355
duke@435	356	// Interpreter oopmap support
duke@435	357	void mask_for(int bci, InterpreterOopMap* mask);
duke@435	358
duke@435	359	#ifndef PRODUCT
duke@435	360	// operations on invocation counter
duke@435	361	void print_invocation_count() const;
duke@435	362	#endif
duke@435	363
duke@435	364	// byte codes
duke@435	365	address code_base() const { return constMethod()->code_base(); }
duke@435	366	bool contains(address bcp) const { return constMethod()->contains(bcp); }
duke@435	367
duke@435	368	// prints byte codes
duke@435	369	void print_codes() const { print_codes_on(tty); }
duke@435	370	void print_codes_on(outputStream* st) const PRODUCT_RETURN;
duke@435	371	void print_codes_on(int from, int to, outputStream* st) const PRODUCT_RETURN;
duke@435	372
duke@435	373	// checked exceptions
duke@435	374	int checked_exceptions_length() const
duke@435	375	{ return constMethod()->checked_exceptions_length(); }
duke@435	376	CheckedExceptionElement* checked_exceptions_start() const
duke@435	377	{ return constMethod()->checked_exceptions_start(); }
duke@435	378
duke@435	379	// localvariable table
duke@435	380	bool has_localvariable_table() const
duke@435	381	{ return constMethod()->has_localvariable_table(); }
duke@435	382	int localvariable_table_length() const
duke@435	383	{ return constMethod()->localvariable_table_length(); }
duke@435	384	LocalVariableTableElement* localvariable_table_start() const
duke@435	385	{ return constMethod()->localvariable_table_start(); }
duke@435	386
duke@435	387	bool has_linenumber_table() const
duke@435	388	{ return constMethod()->has_linenumber_table(); }
duke@435	389	u_char* compressed_linenumber_table() const
duke@435	390	{ return constMethod()->compressed_linenumber_table(); }
duke@435	391
duke@435	392	// method holder (the klassOop holding this method)
duke@435	393	klassOop method_holder() const { return _constants->pool_holder(); }
duke@435	394
duke@435	395	void compute_size_of_parameters(Thread *thread); // word size of parameters (receiver if any + arguments)
duke@435	396	symbolOop klass_name() const; // returns the name of the method holder
duke@435	397	BasicType result_type() const; // type of the method result
duke@435	398	int result_type_index() const; // type index of the method result
duke@435	399	bool is_returning_oop() const { BasicType r = result_type(); return (r == T_OBJECT || r == T_ARRAY); }
duke@435	400	bool is_returning_fp() const { BasicType r = result_type(); return (r == T_FLOAT || r == T_DOUBLE); }
duke@435	401
duke@435	402	// Checked exceptions thrown by this method (resolved to mirrors)
duke@435	403	objArrayHandle resolved_checked_exceptions(TRAPS) { return resolved_checked_exceptions_impl(this, THREAD); }
duke@435	404
duke@435	405	// Access flags
duke@435	406	bool is_public() const { return access_flags().is_public(); }
duke@435	407	bool is_private() const { return access_flags().is_private(); }
duke@435	408	bool is_protected() const { return access_flags().is_protected(); }
duke@435	409	bool is_package_private() const { return !is_public() && !is_private() && !is_protected(); }
duke@435	410	bool is_static() const { return access_flags().is_static(); }
duke@435	411	bool is_final() const { return access_flags().is_final(); }
duke@435	412	bool is_synchronized() const { return access_flags().is_synchronized();}
duke@435	413	bool is_native() const { return access_flags().is_native(); }
duke@435	414	bool is_abstract() const { return access_flags().is_abstract(); }
duke@435	415	bool is_strict() const { return access_flags().is_strict(); }
duke@435	416	bool is_synthetic() const { return access_flags().is_synthetic(); }
duke@435	417
duke@435	418	// returns true if contains only return operation
duke@435	419	bool is_empty_method() const;
duke@435	420
duke@435	421	// returns true if this is a vanilla constructor
duke@435	422	bool is_vanilla_constructor() const;
duke@435	423
duke@435	424	// checks method and its method holder
duke@435	425	bool is_final_method() const;
duke@435	426	bool is_strict_method() const;
duke@435	427
duke@435	428	// true if method needs no dynamic dispatch (final and/or no vtable entry)
duke@435	429	bool can_be_statically_bound() const;
duke@435	430
duke@435	431	// returns true if the method has any backward branches.
duke@435	432	bool has_loops() {
duke@435	433	return access_flags().loops_flag_init() ? access_flags().has_loops() : compute_has_loops_flag();
duke@435	434	};
duke@435	435
duke@435	436	bool compute_has_loops_flag();
duke@435	437
duke@435	438	bool has_jsrs() {
duke@435	439	return access_flags().has_jsrs();
duke@435	440	};
duke@435	441	void set_has_jsrs() {
duke@435	442	_access_flags.set_has_jsrs();
duke@435	443	}
duke@435	444
duke@435	445	// returns true if the method has any monitors.
duke@435	446	bool has_monitors() const { return is_synchronized() || access_flags().has_monitor_bytecodes(); }
duke@435	447	bool has_monitor_bytecodes() const { return access_flags().has_monitor_bytecodes(); }
duke@435	448
duke@435	449	void set_has_monitor_bytecodes() { _access_flags.set_has_monitor_bytecodes(); }
duke@435	450
duke@435	451	// monitor matching. This returns a conservative estimate of whether the monitorenter/monitorexit bytecodes
duke@435	452	// propererly nest in the method. It might return false, even though they actually nest properly, since the info.
duke@435	453	// has not been computed yet.
duke@435	454	bool guaranteed_monitor_matching() const { return access_flags().is_monitor_matching(); }
duke@435	455	void set_guaranteed_monitor_matching() { _access_flags.set_monitor_matching(); }
duke@435	456
duke@435	457	// returns true if the method is an accessor function (setter/getter).
duke@435	458	bool is_accessor() const;
duke@435	459
duke@435	460	// returns true if the method is an initializer (<init> or <clinit>).
duke@435	461	bool is_initializer() const;
duke@435	462
duke@435	463	// compiled code support
duke@435	464	// NOTE: code() is inherently racy as deopt can be clearing code
duke@435	465	// simultaneously. Use with caution.
duke@435	466	bool has_compiled_code() const { return code() != NULL; }
duke@435	467
duke@435	468	// sizing
duke@435	469	static int object_size(bool is_native);
duke@435	470	static int header_size() { return sizeof(methodOopDesc)/HeapWordSize; }
duke@435	471	int object_size() const { return method_size(); }
duke@435	472
duke@435	473	bool object_is_parsable() const { return method_size() > 0; }
duke@435	474
duke@435	475	// interpreter support
duke@435	476	static ByteSize const_offset() { return byte_offset_of(methodOopDesc, _constMethod ); }
duke@435	477	static ByteSize constants_offset() { return byte_offset_of(methodOopDesc, _constants ); }
duke@435	478	static ByteSize access_flags_offset() { return byte_offset_of(methodOopDesc, _access_flags ); }
duke@435	479	#ifdef CC_INTERP
duke@435	480	static ByteSize result_index_offset() { return byte_offset_of(methodOopDesc, _result_index ); }
duke@435	481	#endif /* CC_INTERP */
duke@435	482	static ByteSize size_of_locals_offset() { return byte_offset_of(methodOopDesc, _max_locals ); }
duke@435	483	static ByteSize size_of_parameters_offset() { return byte_offset_of(methodOopDesc, _size_of_parameters); }
duke@435	484	static ByteSize from_compiled_offset() { return byte_offset_of(methodOopDesc, _from_compiled_entry); }
duke@435	485	static ByteSize code_offset() { return byte_offset_of(methodOopDesc, _code); }
duke@435	486	static ByteSize invocation_counter_offset() { return byte_offset_of(methodOopDesc, _invocation_counter); }
duke@435	487	static ByteSize backedge_counter_offset() { return byte_offset_of(methodOopDesc, _backedge_counter); }
duke@435	488	static ByteSize method_data_offset() {
duke@435	489	return byte_offset_of(methodOopDesc, _method_data);
duke@435	490	}
duke@435	491	static ByteSize interpreter_invocation_counter_offset() { return byte_offset_of(methodOopDesc, _interpreter_invocation_count); }
duke@435	492	#ifndef PRODUCT
duke@435	493	static ByteSize compiled_invocation_counter_offset() { return byte_offset_of(methodOopDesc, _compiled_invocation_count); }
duke@435	494	#endif // not PRODUCT
duke@435	495	static ByteSize native_function_offset() { return in_ByteSize(sizeof(methodOopDesc)); }
duke@435	496	static ByteSize from_interpreted_offset() { return byte_offset_of(methodOopDesc, _from_interpreted_entry ); }
duke@435	497	static ByteSize interpreter_entry_offset() { return byte_offset_of(methodOopDesc, _i2i_entry ); }
duke@435	498	static ByteSize signature_handler_offset() { return in_ByteSize(sizeof(methodOopDesc) + wordSize); }
duke@435	499	static ByteSize max_stack_offset() { return byte_offset_of(methodOopDesc, _max_stack ); }
duke@435	500
duke@435	501	// for code generation
duke@435	502	static int method_data_offset_in_bytes() { return offset_of(methodOopDesc, _method_data); }
duke@435	503	static int interpreter_invocation_counter_offset_in_bytes()
duke@435	504	{ return offset_of(methodOopDesc, _interpreter_invocation_count); }
duke@435	505
duke@435	506	// Static methods that are used to implement member methods where an exposed this pointer
duke@435	507	// is needed due to possible GCs
duke@435	508	static objArrayHandle resolved_checked_exceptions_impl(methodOop this_oop, TRAPS);
duke@435	509
duke@435	510	// Returns the byte code index from the byte code pointer
duke@435	511	int bci_from(address bcp) const;
duke@435	512	address bcp_from(int bci) const;
duke@435	513	int validate_bci_from_bcx(intptr_t bcx) const;
duke@435	514
duke@435	515	// Returns the line number for a bci if debugging information for the method is prowided,
duke@435	516	// -1 is returned otherwise.
duke@435	517	int line_number_from_bci(int bci) const;
duke@435	518
duke@435	519	// Reflection support
duke@435	520	bool is_overridden_in(klassOop k) const;
duke@435	521
duke@435	522	// RedefineClasses() support:
duke@435	523	bool is_old() const { return access_flags().is_old(); }
duke@435	524	void set_is_old() { _access_flags.set_is_old(); }
duke@435	525	bool is_obsolete() const { return access_flags().is_obsolete(); }
duke@435	526	void set_is_obsolete() { _access_flags.set_is_obsolete(); }
duke@435	527
duke@435	528	// JVMTI Native method prefixing support:
duke@435	529	bool is_prefixed_native() const { return access_flags().is_prefixed_native(); }
duke@435	530	void set_is_prefixed_native() { _access_flags.set_is_prefixed_native(); }
duke@435	531
duke@435	532	// Rewriting support
duke@435	533	static methodHandle clone_with_new_data(methodHandle m, u_char* new_code, int new_code_length,
duke@435	534	u_char* new_compressed_linenumber_table, int new_compressed_linenumber_size, TRAPS);
duke@435	535
duke@435	536	// Get this method's jmethodID -- allocate if it doesn't exist
duke@435	537	jmethodID jmethod_id() { methodHandle this_h(this);
duke@435	538	return instanceKlass::jmethod_id_for_impl(method_holder(), this_h); }
duke@435	539
duke@435	540	// Lookup the jmethodID for this method. Return NULL if not found.
duke@435	541	// NOTE that this function can be called from a signal handler
duke@435	542	// (see AsyncGetCallTrace support for Forte Analyzer) and this
duke@435	543	// needs to be async-safe. No allocation should be done and
duke@435	544	// so handles are not used to avoid deadlock.
duke@435	545	jmethodID find_jmethod_id_or_null() { return instanceKlass::cast(method_holder())->jmethod_id_or_null(this); }
duke@435	546
duke@435	547	// JNI static invoke cached itable index accessors
duke@435	548	int cached_itable_index() { return instanceKlass::cast(method_holder())->cached_itable_index(method_idnum()); }
duke@435	549	void set_cached_itable_index(int index) { instanceKlass::cast(method_holder())->set_cached_itable_index(method_idnum(), index); }
duke@435	550
duke@435	551	// Support for inlining of intrinsic methods
duke@435	552	vmIntrinsics::ID intrinsic_id() const { // returns zero if not an intrinsic
duke@435	553	const u1& cache = _intrinsic_id_cache;
duke@435	554	if (cache != 0) {
duke@435	555	return (vmIntrinsics::ID)(cache - 1);
duke@435	556	} else {
duke@435	557	vmIntrinsics::ID id = compute_intrinsic_id();
duke@435	558	*(u1*)&cache = ((u1) id) + 1; // force the cache to be non-const
duke@435	559	vmIntrinsics::verify_method(id, (methodOop) this);
duke@435	560	assert((vmIntrinsics::ID)(cache - 1) == id, "proper conversion");
duke@435	561	return id;
duke@435	562	}
duke@435	563	}
duke@435	564
duke@435	565	// On-stack replacement support
duke@435	566	bool has_osr_nmethod() { return instanceKlass::cast(method_holder())->lookup_osr_nmethod(this, InvocationEntryBci) != NULL; }
duke@435	567	nmethod* lookup_osr_nmethod_for(int bci) { return instanceKlass::cast(method_holder())->lookup_osr_nmethod(this, bci); }
duke@435	568
duke@435	569	// Inline cache support
duke@435	570	void cleanup_inline_caches();
duke@435	571
duke@435	572	// Find if klass for method is loaded
duke@435	573	bool is_klass_loaded_by_klass_index(int klass_index) const;
duke@435	574	bool is_klass_loaded(int refinfo_index, bool must_be_resolved = false) const;
duke@435	575
duke@435	576	// Indicates whether compilation failed earlier for this method, or
duke@435	577	// whether it is not compilable for another reason like having a
duke@435	578	// breakpoint set in it.
duke@435	579	bool is_not_compilable(int comp_level = CompLevel_highest_tier) const;
duke@435	580	void set_not_compilable(int comp_level = CompLevel_highest_tier);
duke@435	581
duke@435	582	bool is_not_osr_compilable() const { return is_not_compilable() || access_flags().is_not_osr_compilable(); }
duke@435	583	void set_not_osr_compilable() { _access_flags.set_not_osr_compilable(); }
duke@435	584
duke@435	585	bool is_not_tier1_compilable() const { return access_flags().is_not_tier1_compilable(); }
duke@435	586	void set_not_tier1_compilable() { _access_flags.set_not_tier1_compilable(); }
duke@435	587
duke@435	588	// Background compilation support
duke@435	589	bool queued_for_compilation() const { return access_flags().queued_for_compilation(); }
duke@435	590	void set_queued_for_compilation() { _access_flags.set_queued_for_compilation(); }
duke@435	591	void clear_queued_for_compilation() { _access_flags.clear_queued_for_compilation(); }
duke@435	592
duke@435	593	static methodOop method_from_bcp(address bcp);
duke@435	594
duke@435	595	// Resolve all classes in signature, return 'true' if successful
duke@435	596	static bool load_signature_classes(methodHandle m, TRAPS);
duke@435	597
duke@435	598	// Return if true if not all classes references in signature, including return type, has been loaded
duke@435	599	static bool has_unloaded_classes_in_signature(methodHandle m, TRAPS);
duke@435	600
duke@435	601	// Printing
duke@435	602	void print_short_name(outputStream* st) /*PRODUCT_RETURN*/; // prints as klassname::methodname; Exposed so field engineers can debug VM
duke@435	603	void print_name(outputStream* st) PRODUCT_RETURN; // prints as "virtual void foo(int)"
duke@435	604
duke@435	605	// Helper routine used for method sorting
duke@435	606	static void sort_methods(objArrayOop methods,
duke@435	607	objArrayOop methods_annotations,
duke@435	608	objArrayOop methods_parameter_annotations,
duke@435	609	objArrayOop methods_default_annotations,
duke@435	610	bool idempotent = false);
duke@435	611
duke@435	612	// size of parameters
duke@435	613	void set_size_of_parameters(int size) { _size_of_parameters = size; }
duke@435	614	private:
duke@435	615
duke@435	616	// Helper routine for intrinsic_id().
duke@435	617	vmIntrinsics::ID compute_intrinsic_id() const;
duke@435	618
duke@435	619	// Inlined elements
duke@435	620	address* native_function_addr() const { assert(is_native(), "must be native"); return (address*) (this+1); }
duke@435	621	address* signature_handler_addr() const { return native_function_addr() + 1; }
duke@435	622
duke@435	623	// Garbage collection support
duke@435	624	oop* adr_constMethod() const { return (oop*)&_constMethod; }
duke@435	625	oop* adr_constants() const { return (oop*)&_constants; }
duke@435	626	oop* adr_method_data() const { return (oop*)&_method_data; }
duke@435	627	};
duke@435	628
duke@435	629
duke@435	630	// Utility class for compressing line number tables
duke@435	631
duke@435	632	class CompressedLineNumberWriteStream: public CompressedWriteStream {
duke@435	633	private:
duke@435	634	int _bci;
duke@435	635	int _line;
duke@435	636	public:
duke@435	637	// Constructor
duke@435	638	CompressedLineNumberWriteStream(int initial_size) : CompressedWriteStream(initial_size), _bci(0), _line(0) {}
duke@435	639	CompressedLineNumberWriteStream(u_char* buffer, int initial_size) : CompressedWriteStream(buffer, initial_size), _bci(0), _line(0) {}
duke@435	640
duke@435	641	// Write (bci, line number) pair to stream
duke@435	642	void write_pair_regular(int bci_delta, int line_delta);
duke@435	643
duke@435	644	inline void write_pair_inline(int bci, int line) {
duke@435	645	int bci_delta = bci - _bci;
duke@435	646	int line_delta = line - _line;
duke@435	647	_bci = bci;
duke@435	648	_line = line;
duke@435	649	// Skip (0,0) deltas - they do not add information and conflict with terminator.
duke@435	650	if (bci_delta == 0 && line_delta == 0) return;
duke@435	651	// Check if bci is 5-bit and line number 3-bit unsigned.
duke@435	652	if (((bci_delta & ~0x1F) == 0) && ((line_delta & ~0x7) == 0)) {
duke@435	653	// Compress into single byte.
duke@435	654	jubyte value = ((jubyte) bci_delta << 3) | (jubyte) line_delta;
duke@435	655	// Check that value doesn't match escape character.
duke@435	656	if (value != 0xFF) {
duke@435	657	write_byte(value);
duke@435	658	return;
duke@435	659	}
duke@435	660	}
duke@435	661	write_pair_regular(bci_delta, line_delta);
duke@435	662	}
duke@435	663
duke@435	664	// Windows AMD64 + Apr 2005 PSDK with /O2 generates bad code for write_pair.
duke@435	665	// Disabling optimization doesn't work for methods in header files
duke@435	666	// so we force it to call through the non-optimized version in the .cpp.
duke@435	667	// It's gross, but it's the only way we can ensure that all callers are
duke@435	668	// fixed. MSC_VER is defined in build/windows/makefiles/compile.make.
duke@435	669	#if defined(_M_AMD64) && MSC_VER >= 1400
duke@435	670	void write_pair(int bci, int line);
duke@435	671	#else
duke@435	672	void write_pair(int bci, int line) { write_pair_inline(bci, line); }
duke@435	673	#endif
duke@435	674
duke@435	675	// Write end-of-stream marker
duke@435	676	void write_terminator() { write_byte(0); }
duke@435	677	};
duke@435	678
duke@435	679
duke@435	680	// Utility class for decompressing line number tables
duke@435	681
duke@435	682	class CompressedLineNumberReadStream: public CompressedReadStream {
duke@435	683	private:
duke@435	684	int _bci;
duke@435	685	int _line;
duke@435	686	public:
duke@435	687	// Constructor
duke@435	688	CompressedLineNumberReadStream(u_char* buffer);
duke@435	689	// Read (bci, line number) pair from stream. Returns false at end-of-stream.
duke@435	690	bool read_pair();
duke@435	691	// Accessing bci and line number (after calling read_pair)
duke@435	692	int bci() const { return _bci; }
duke@435	693	int line() const { return _line; }
duke@435	694	};
duke@435	695
duke@435	696
duke@435	697	/// Fast Breakpoints.
duke@435	698
duke@435	699	// If this structure gets more complicated (because bpts get numerous),
duke@435	700	// move it into its own header.
duke@435	701
duke@435	702	// There is presently no provision for concurrent access
duke@435	703	// to breakpoint lists, which is only OK for JVMTI because
duke@435	704	// breakpoints are written only at safepoints, and are read
duke@435	705	// concurrently only outside of safepoints.
duke@435	706
duke@435	707	class BreakpointInfo : public CHeapObj {
duke@435	708	friend class VMStructs;
duke@435	709	private:
duke@435	710	Bytecodes::Code _orig_bytecode;
duke@435	711	int _bci;
duke@435	712	u2 _name_index; // of method
duke@435	713	u2 _signature_index; // of method
duke@435	714	BreakpointInfo* _next; // simple storage allocation
duke@435	715
duke@435	716	public:
duke@435	717	BreakpointInfo(methodOop m, int bci);
duke@435	718
duke@435	719	// accessors
duke@435	720	Bytecodes::Code orig_bytecode() { return _orig_bytecode; }
duke@435	721	void set_orig_bytecode(Bytecodes::Code code) { _orig_bytecode = code; }
duke@435	722	int bci() { return _bci; }
duke@435	723
duke@435	724	BreakpointInfo* next() const { return _next; }
duke@435	725	void set_next(BreakpointInfo* n) { _next = n; }
duke@435	726
duke@435	727	// helps for searchers
duke@435	728	bool match(methodOop m, int bci) {
duke@435	729	return bci == _bci && match(m);
duke@435	730	}
duke@435	731
duke@435	732	bool match(methodOop m) {
duke@435	733	return _name_index == m->name_index() &&
duke@435	734	_signature_index == m->signature_index();
duke@435	735	}
duke@435	736
duke@435	737	void set(methodOop method);
duke@435	738	void clear(methodOop method);
duke@435	739	};