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src/share/vm/ci/ciEnv.hpp@b4776199210f (annotated)

src/share/vm/ci/ciEnv.hpp

Mon, 26 Apr 2010 23:59:45 -0700

author

never

date

Mon, 26 Apr 2010 23:59:45 -0700

changeset 1832

b4776199210f

parent 1648

6deeaebad47a

child 1907

c18cbe5936b8

permissions

-rw-r--r--

6943485: JVMTI always on capabilities change code generation too much
Reviewed-by: twisti, dcubed

duke@435	1	/*
dcubed@1648	2	* Copyright 1999-2010 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
duke@435	25	class CompileTask;
duke@435	26
duke@435	27	// ciEnv
duke@435	28	//
duke@435	29	// This class is the top level broker for requests from the compiler
duke@435	30	// to the VM.
duke@435	31	class ciEnv : StackObj {
duke@435	32	CI_PACKAGE_ACCESS_TO
duke@435	33
duke@435	34	friend class CompileBroker;
duke@435	35	friend class Dependencies; // for get_object, during logging
duke@435	36
duke@435	37	private:
duke@435	38	Arena* _arena; // Alias for _ciEnv_arena except in init_shared_objects()
duke@435	39	Arena _ciEnv_arena;
duke@435	40	int _system_dictionary_modification_counter;
duke@435	41	ciObjectFactory* _factory;
duke@435	42	OopRecorder* _oop_recorder;
duke@435	43	DebugInformationRecorder* _debug_info;
duke@435	44	Dependencies* _dependencies;
duke@435	45	const char* _failure_reason;
duke@435	46	int _compilable;
duke@435	47	bool _break_at_compile;
duke@435	48	int _num_inlined_bytecodes;
duke@435	49	CompileTask* _task; // faster access to CompilerThread::task
duke@435	50	CompileLog* _log; // faster access to CompilerThread::log
duke@435	51	void* _compiler_data; // compiler-specific stuff, if any
duke@435	52
duke@435	53	char* _name_buffer;
duke@435	54	int _name_buffer_len;
duke@435	55
kvn@1215	56	// Cache Jvmti state
kvn@1215	57	bool _jvmti_can_hotswap_or_post_breakpoint;
kvn@1215	58	bool _jvmti_can_access_local_variables;
dcubed@1648	59	bool _jvmti_can_post_on_exceptions;
kvn@1215	60
kvn@1215	61	// Cache DTrace flags
kvn@1215	62	bool _dtrace_extended_probes;
kvn@1215	63	bool _dtrace_monitor_probes;
kvn@1215	64	bool _dtrace_method_probes;
kvn@1215	65	bool _dtrace_alloc_probes;
kvn@1215	66
duke@435	67	// Distinguished instances of certain ciObjects..
duke@435	68	static ciObject* _null_object_instance;
duke@435	69	static ciMethodKlass* _method_klass_instance;
duke@435	70	static ciSymbolKlass* _symbol_klass_instance;
duke@435	71	static ciKlassKlass* _klass_klass_instance;
duke@435	72	static ciInstanceKlassKlass* _instance_klass_klass_instance;
duke@435	73	static ciTypeArrayKlassKlass* _type_array_klass_klass_instance;
duke@435	74	static ciObjArrayKlassKlass* _obj_array_klass_klass_instance;
duke@435	75
never@1577	76	#define WK_KLASS_DECL(name, ignore_s, ignore_o) static ciInstanceKlass* _##name;
never@1577	77	WK_KLASSES_DO(WK_KLASS_DECL)
never@1577	78	#undef WK_KLASS_DECL
duke@435	79
duke@435	80	static ciSymbol* _unloaded_cisymbol;
duke@435	81	static ciInstanceKlass* _unloaded_ciinstance_klass;
duke@435	82	static ciObjArrayKlass* _unloaded_ciobjarrayklass;
duke@435	83
duke@435	84	static jobject _ArrayIndexOutOfBoundsException_handle;
duke@435	85	static jobject _ArrayStoreException_handle;
duke@435	86	static jobject _ClassCastException_handle;
duke@435	87
duke@435	88	ciInstance* _NullPointerException_instance;
duke@435	89	ciInstance* _ArithmeticException_instance;
duke@435	90	ciInstance* _ArrayIndexOutOfBoundsException_instance;
duke@435	91	ciInstance* _ArrayStoreException_instance;
duke@435	92	ciInstance* _ClassCastException_instance;
duke@435	93
never@1515	94	ciInstance* _the_null_string; // The Java string "null"
never@1515	95	ciInstance* _the_min_jint_string; // The Java string "-2147483648"
never@1515	96
duke@435	97	// Look up a klass by name from a particular class loader (the accessor's).
duke@435	98	// If require_local, result must be defined in that class loader, or NULL.
duke@435	99	// If !require_local, a result from remote class loader may be reported,
duke@435	100	// if sufficient class loader constraints exist such that initiating
duke@435	101	// a class loading request from the given loader is bound to return
duke@435	102	// the class defined in the remote loader (or throw an error).
duke@435	103	//
duke@435	104	// Return an unloaded klass if !require_local and no class at all is found.
duke@435	105	//
duke@435	106	// The CI treats a klass as loaded if it is consistently defined in
duke@435	107	// another loader, even if it hasn't yet been loaded in all loaders
duke@435	108	// that could potentially see it via delegation.
duke@435	109	ciKlass* get_klass_by_name(ciKlass* accessing_klass,
duke@435	110	ciSymbol* klass_name,
duke@435	111	bool require_local);
duke@435	112
duke@435	113	// Constant pool access.
twisti@1573	114	ciKlass* get_klass_by_index(constantPoolHandle cpool,
duke@435	115	int klass_index,
twisti@1573	116	bool& is_accessible,
twisti@1573	117	ciInstanceKlass* loading_klass);
twisti@1573	118	ciConstant get_constant_by_index(constantPoolHandle cpool,
twisti@1573	119	int constant_index,
twisti@1573	120	ciInstanceKlass* accessor);
duke@435	121	bool is_unresolved_string(ciInstanceKlass* loading_klass,
duke@435	122	int constant_index) const;
duke@435	123	bool is_unresolved_klass(ciInstanceKlass* loading_klass,
duke@435	124	int constant_index) const;
duke@435	125	ciField* get_field_by_index(ciInstanceKlass* loading_klass,
duke@435	126	int field_index);
twisti@1573	127	ciMethod* get_method_by_index(constantPoolHandle cpool,
twisti@1573	128	int method_index, Bytecodes::Code bc,
twisti@1573	129	ciInstanceKlass* loading_klass);
duke@435	130
duke@435	131	// Implementation methods for loading and constant pool access.
duke@435	132	ciKlass* get_klass_by_name_impl(ciKlass* accessing_klass,
duke@435	133	ciSymbol* klass_name,
duke@435	134	bool require_local);
twisti@1573	135	ciKlass* get_klass_by_index_impl(constantPoolHandle cpool,
duke@435	136	int klass_index,
twisti@1573	137	bool& is_accessible,
twisti@1573	138	ciInstanceKlass* loading_klass);
twisti@1573	139	ciConstant get_constant_by_index_impl(constantPoolHandle cpool,
twisti@1573	140	int constant_index,
twisti@1573	141	ciInstanceKlass* loading_klass);
duke@435	142	bool is_unresolved_string_impl (instanceKlass* loading_klass,
duke@435	143	int constant_index) const;
duke@435	144	bool is_unresolved_klass_impl (instanceKlass* loading_klass,
duke@435	145	int constant_index) const;
duke@435	146	ciField* get_field_by_index_impl(ciInstanceKlass* loading_klass,
duke@435	147	int field_index);
twisti@1573	148	ciMethod* get_method_by_index_impl(constantPoolHandle cpool,
twisti@1573	149	int method_index, Bytecodes::Code bc,
twisti@1573	150	ciInstanceKlass* loading_klass);
twisti@1573	151	ciMethod* get_fake_invokedynamic_method_impl(constantPoolHandle cpool,
twisti@1572	152	int index, Bytecodes::Code bc);
duke@435	153
duke@435	154	// Helper methods
duke@435	155	bool check_klass_accessibility(ciKlass* accessing_klass,
duke@435	156	klassOop resolved_klassOop);
duke@435	157	methodOop lookup_method(instanceKlass* accessor,
duke@435	158	instanceKlass* holder,
duke@435	159	symbolOop name,
duke@435	160	symbolOop sig,
duke@435	161	Bytecodes::Code bc);
duke@435	162
duke@435	163	// Get a ciObject from the object factory. Ensures uniqueness
duke@435	164	// of ciObjects.
duke@435	165	ciObject* get_object(oop o) {
duke@435	166	if (o == NULL) {
duke@435	167	return _null_object_instance;
duke@435	168	} else {
duke@435	169	return _factory->get(o);
duke@435	170	}
duke@435	171	}
duke@435	172
duke@435	173	ciMethod* get_method_from_handle(jobject method);
duke@435	174
duke@435	175	ciInstance* get_or_create_exception(jobject& handle, symbolHandle name);
duke@435	176
duke@435	177	// Get a ciMethod representing either an unfound method or
duke@435	178	// a method with an unloaded holder. Ensures uniqueness of
duke@435	179	// the result.
duke@435	180	ciMethod* get_unloaded_method(ciInstanceKlass* holder,
duke@435	181	ciSymbol* name,
duke@435	182	ciSymbol* signature) {
duke@435	183	return _factory->get_unloaded_method(holder, name, signature);
duke@435	184	}
duke@435	185
duke@435	186	// Get a ciKlass representing an unloaded klass.
duke@435	187	// Ensures uniqueness of the result.
duke@435	188	ciKlass* get_unloaded_klass(ciKlass* accessing_klass,
duke@435	189	ciSymbol* name) {
duke@435	190	return _factory->get_unloaded_klass(accessing_klass, name, true);
duke@435	191	}
duke@435	192
duke@435	193	// See if we already have an unloaded klass for the given name
duke@435	194	// or return NULL if not.
duke@435	195	ciKlass *check_get_unloaded_klass(ciKlass* accessing_klass, ciSymbol* name) {
duke@435	196	return _factory->get_unloaded_klass(accessing_klass, name, false);
duke@435	197	}
duke@435	198
duke@435	199	// Get a ciReturnAddress corresponding to the given bci.
duke@435	200	// Ensures uniqueness of the result.
duke@435	201	ciReturnAddress* get_return_address(int bci) {
duke@435	202	return _factory->get_return_address(bci);
duke@435	203	}
duke@435	204
duke@435	205	// Get a ciMethodData representing the methodData for a method
duke@435	206	// with none.
duke@435	207	ciMethodData* get_empty_methodData() {
duke@435	208	return _factory->get_empty_methodData();
duke@435	209	}
duke@435	210
duke@435	211	// General utility : get a buffer of some required length.
duke@435	212	// Used in symbol creation.
duke@435	213	char* name_buffer(int req_len);
duke@435	214
duke@435	215	// Is this thread currently in the VM state?
duke@435	216	static bool is_in_vm();
duke@435	217
duke@435	218	// Helper routine for determining the validity of a compilation
duke@435	219	// with respect to concurrent class loading.
duke@435	220	void check_for_system_dictionary_modification(ciMethod* target);
duke@435	221
duke@435	222	public:
duke@435	223	enum {
duke@435	224	MethodCompilable,
duke@435	225	MethodCompilable_not_at_tier,
duke@435	226	MethodCompilable_never
duke@435	227	};
duke@435	228
duke@435	229	ciEnv(CompileTask* task, int system_dictionary_modification_counter);
duke@435	230	// Used only during initialization of the ci
duke@435	231	ciEnv(Arena* arena);
duke@435	232	~ciEnv();
duke@435	233
duke@435	234	OopRecorder* oop_recorder() { return _oop_recorder; }
duke@435	235	void set_oop_recorder(OopRecorder* r) { _oop_recorder = r; }
duke@435	236
duke@435	237	DebugInformationRecorder* debug_info() { return _debug_info; }
duke@435	238	void set_debug_info(DebugInformationRecorder* i) { _debug_info = i; }
duke@435	239
duke@435	240	Dependencies* dependencies() { return _dependencies; }
duke@435	241	void set_dependencies(Dependencies* d) { _dependencies = d; }
duke@435	242
duke@435	243	// This is true if the compilation is not going to produce code.
duke@435	244	// (It is reasonable to retry failed compilations.)
duke@435	245	bool failing() { return _failure_reason != NULL; }
duke@435	246
duke@435	247	// Reason this compilation is failing, such as "too many basic blocks".
duke@435	248	const char* failure_reason() { return _failure_reason; }
duke@435	249
duke@435	250	// Return state of appropriate compilability
duke@435	251	int compilable() { return _compilable; }
duke@435	252
duke@435	253	bool break_at_compile() { return _break_at_compile; }
duke@435	254	void set_break_at_compile(bool z) { _break_at_compile = z; }
duke@435	255
kvn@1215	256	// Cache Jvmti state
kvn@1215	257	void cache_jvmti_state();
kvn@1215	258	bool jvmti_can_hotswap_or_post_breakpoint() const { return _jvmti_can_hotswap_or_post_breakpoint; }
kvn@1215	259	bool jvmti_can_access_local_variables() const { return _jvmti_can_access_local_variables; }
dcubed@1648	260	bool jvmti_can_post_on_exceptions() const { return _jvmti_can_post_on_exceptions; }
kvn@1215	261
kvn@1215	262	// Cache DTrace flags
kvn@1215	263	void cache_dtrace_flags();
kvn@1215	264	bool dtrace_extended_probes() const { return _dtrace_extended_probes; }
kvn@1215	265	bool dtrace_monitor_probes() const { return _dtrace_monitor_probes; }
kvn@1215	266	bool dtrace_method_probes() const { return _dtrace_method_probes; }
kvn@1215	267	bool dtrace_alloc_probes() const { return _dtrace_alloc_probes; }
kvn@1215	268
duke@435	269	// The compiler task which has created this env.
duke@435	270	// May be useful to find out compile_id, comp_level, etc.
duke@435	271	CompileTask* task() { return _task; }
duke@435	272	// Handy forwards to the task:
duke@435	273	int comp_level(); // task()->comp_level()
duke@435	274	uint compile_id(); // task()->compile_id()
duke@435	275
duke@435	276	// Register the result of a compilation.
duke@435	277	void register_method(ciMethod* target,
duke@435	278	int entry_bci,
duke@435	279	CodeOffsets* offsets,
duke@435	280	int orig_pc_offset,
duke@435	281	CodeBuffer* code_buffer,
duke@435	282	int frame_words,
duke@435	283	OopMapSet* oop_map_set,
duke@435	284	ExceptionHandlerTable* handler_table,
duke@435	285	ImplicitExceptionTable* inc_table,
duke@435	286	AbstractCompiler* compiler,
duke@435	287	int comp_level,
duke@435	288	bool has_debug_info = true,
duke@435	289	bool has_unsafe_access = false);
duke@435	290
duke@435	291
duke@435	292	// Access to certain well known ciObjects.
never@1577	293	#define WK_KLASS_FUNC(name, ignore_s, ignore_o) \
never@1577	294	ciInstanceKlass* name() { \
never@1577	295	return _##name;\
duke@435	296	}
never@1577	297	WK_KLASSES_DO(WK_KLASS_FUNC)
never@1577	298	#undef WK_KLASS_FUNC
never@1577	299
duke@435	300	ciInstance* NullPointerException_instance() {
duke@435	301	assert(_NullPointerException_instance != NULL, "initialization problem");
duke@435	302	return _NullPointerException_instance;
duke@435	303	}
duke@435	304	ciInstance* ArithmeticException_instance() {
duke@435	305	assert(_ArithmeticException_instance != NULL, "initialization problem");
duke@435	306	return _ArithmeticException_instance;
duke@435	307	}
duke@435	308
duke@435	309	// Lazy constructors:
duke@435	310	ciInstance* ArrayIndexOutOfBoundsException_instance();
duke@435	311	ciInstance* ArrayStoreException_instance();
duke@435	312	ciInstance* ClassCastException_instance();
duke@435	313
never@1515	314	ciInstance* the_null_string();
never@1515	315	ciInstance* the_min_jint_string();
never@1515	316
duke@435	317	static ciSymbol* unloaded_cisymbol() {
duke@435	318	return _unloaded_cisymbol;
duke@435	319	}
duke@435	320	static ciObjArrayKlass* unloaded_ciobjarrayklass() {
duke@435	321	return _unloaded_ciobjarrayklass;
duke@435	322	}
duke@435	323	static ciInstanceKlass* unloaded_ciinstance_klass() {
duke@435	324	return _unloaded_ciinstance_klass;
duke@435	325	}
duke@435	326
duke@435	327	ciKlass* find_system_klass(ciSymbol* klass_name);
duke@435	328	// Note: To find a class from its name string, use ciSymbol::make,
duke@435	329	// but consider adding to vmSymbols.hpp instead.
duke@435	330
duke@435	331	// Use this to make a holder for non-perm compile time constants.
jrose@1424	332	// The resulting array is guaranteed to satisfy "can_be_constant".
jrose@1424	333	ciArray* make_system_array(GrowableArray<ciObject*>* objects);
duke@435	334
duke@435	335	// converts the ciKlass* representing the holder of a method into a
duke@435	336	// ciInstanceKlass*. This is needed since the holder of a method in
duke@435	337	// the bytecodes could be an array type. Basically this converts
duke@435	338	// array types into java/lang/Object and other types stay as they are.
duke@435	339	static ciInstanceKlass* get_instance_klass_for_declared_method_holder(ciKlass* klass);
duke@435	340
duke@435	341	// Return the machine-level offset of o, which must be an element of a.
duke@435	342	// This may be used to form constant-loading expressions in lieu of simpler encodings.
duke@435	343	int array_element_offset_in_bytes(ciArray* a, ciObject* o);
duke@435	344
duke@435	345	// Access to the compile-lifetime allocation arena.
duke@435	346	Arena* arena() { return _arena; }
duke@435	347
duke@435	348	// What is the current compilation environment?
duke@435	349	static ciEnv* current() { return CompilerThread::current()->env(); }
duke@435	350
duke@435	351	// Overload with current thread argument
duke@435	352	static ciEnv* current(CompilerThread *thread) { return thread->env(); }
duke@435	353
duke@435	354	// Per-compiler data. (Used by C2 to publish the Compile* pointer.)
duke@435	355	void* compiler_data() { return _compiler_data; }
duke@435	356	void set_compiler_data(void* x) { _compiler_data = x; }
duke@435	357
duke@435	358	// Notice that a method has been inlined in the current compile;
duke@435	359	// used only for statistics.
duke@435	360	void notice_inlined_method(ciMethod* method);
duke@435	361
duke@435	362	// Total number of bytecodes in inlined methods in this compile
duke@435	363	int num_inlined_bytecodes() const;
duke@435	364
duke@435	365	// Output stream for logging compilation info.
duke@435	366	CompileLog* log() { return _log; }
duke@435	367	void set_log(CompileLog* log) { _log = log; }
duke@435	368
duke@435	369	// Check for changes to the system dictionary during compilation
duke@435	370	bool system_dictionary_modification_counter_changed();
duke@435	371
duke@435	372	void record_failure(const char* reason);
duke@435	373	void record_method_not_compilable(const char* reason, bool all_tiers = true);
duke@435	374	void record_out_of_memory_failure();
duke@435	375	};