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src/share/vm/classfile/classFileParser.hpp@9eebd3ac74cf (annotated)

src/share/vm/classfile/classFileParser.hpp

Thu, 13 Aug 2009 16:22:45 -0700

author

jcoomes

date

Thu, 13 Aug 2009 16:22:45 -0700

changeset 1374

9eebd3ac74cf

parent 1373

b37c246bf7ce

child 1409

26b774d693aa

permissions

-rw-r--r--

6845368: large objects cause a crash or unexpected exception
Reviewed-by: jmasa, iveresov

duke@435	1	/*
jrose@1145	2	* Copyright 1997-2009 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	// Parser for for .class files
duke@435	26	//
duke@435	27	// The bytes describing the class file structure is read from a Stream object
duke@435	28
duke@435	29	class ClassFileParser VALUE_OBJ_CLASS_SPEC {
duke@435	30	private:
duke@435	31	bool _need_verify;
duke@435	32	bool _relax_verify;
duke@435	33	u2 _major_version;
duke@435	34	u2 _minor_version;
duke@435	35	symbolHandle _class_name;
jrose@1145	36	KlassHandle _host_klass;
jrose@866	37	GrowableArray<Handle>* _cp_patches; // overrides for CP entries
duke@435	38
duke@435	39	bool _has_finalizer;
duke@435	40	bool _has_empty_finalizer;
duke@435	41	bool _has_vanilla_constructor;
duke@435	42
duke@435	43	enum { fixed_buffer_size = 128 };
duke@435	44	u_char linenumbertable_buffer[fixed_buffer_size];
duke@435	45
duke@435	46	ClassFileStream* _stream; // Actual input stream
duke@435	47
duke@435	48	enum { LegalClass, LegalField, LegalMethod }; // used to verify unqualified names
duke@435	49
duke@435	50	// Accessors
duke@435	51	ClassFileStream* stream() { return _stream; }
duke@435	52	void set_stream(ClassFileStream* st) { _stream = st; }
duke@435	53
duke@435	54	// Constant pool parsing
duke@435	55	void parse_constant_pool_entries(constantPoolHandle cp, int length, TRAPS);
duke@435	56
duke@435	57	constantPoolHandle parse_constant_pool(TRAPS);
duke@435	58
duke@435	59	// Interface parsing
duke@435	60	objArrayHandle parse_interfaces(constantPoolHandle cp,
duke@435	61	int length,
duke@435	62	Handle class_loader,
duke@435	63	Handle protection_domain,
duke@435	64	symbolHandle class_name,
duke@435	65	TRAPS);
duke@435	66
duke@435	67	// Field parsing
duke@435	68	void parse_field_attributes(constantPoolHandle cp, u2 attributes_count,
duke@435	69	bool is_static, u2 signature_index,
duke@435	70	u2* constantvalue_index_addr,
duke@435	71	bool* is_synthetic_addr,
duke@435	72	u2* generic_signature_index_addr,
duke@435	73	typeArrayHandle* field_annotations, TRAPS);
duke@435	74	typeArrayHandle parse_fields(constantPoolHandle cp, bool is_interface,
duke@435	75	struct FieldAllocationCount *fac,
duke@435	76	objArrayHandle* fields_annotations, TRAPS);
duke@435	77
duke@435	78	// Method parsing
duke@435	79	methodHandle parse_method(constantPoolHandle cp, bool is_interface,
duke@435	80	AccessFlags* promoted_flags,
duke@435	81	typeArrayHandle* method_annotations,
duke@435	82	typeArrayHandle* method_parameter_annotations,
duke@435	83	typeArrayHandle* method_default_annotations,
duke@435	84	TRAPS);
duke@435	85	objArrayHandle parse_methods (constantPoolHandle cp, bool is_interface,
duke@435	86	AccessFlags* promoted_flags,
duke@435	87	bool* has_final_method,
duke@435	88	objArrayOop* methods_annotations_oop,
duke@435	89	objArrayOop* methods_parameter_annotations_oop,
duke@435	90	objArrayOop* methods_default_annotations_oop,
duke@435	91	TRAPS);
duke@435	92	typeArrayHandle sort_methods (objArrayHandle methods,
duke@435	93	objArrayHandle methods_annotations,
duke@435	94	objArrayHandle methods_parameter_annotations,
duke@435	95	objArrayHandle methods_default_annotations,
duke@435	96	TRAPS);
duke@435	97	typeArrayHandle parse_exception_table(u4 code_length, u4 exception_table_length,
duke@435	98	constantPoolHandle cp, TRAPS);
duke@435	99	void parse_linenumber_table(
duke@435	100	u4 code_attribute_length, u4 code_length,
duke@435	101	CompressedLineNumberWriteStream** write_stream, TRAPS);
duke@435	102	u2* parse_localvariable_table(u4 code_length, u2 max_locals, u4 code_attribute_length,
duke@435	103	constantPoolHandle cp, u2* localvariable_table_length,
duke@435	104	bool isLVTT, TRAPS);
duke@435	105	u2* parse_checked_exceptions(u2* checked_exceptions_length, u4 method_attribute_length,
duke@435	106	constantPoolHandle cp, TRAPS);
duke@435	107	void parse_type_array(u2 array_length, u4 code_length, u4* u1_index, u4* u2_index,
duke@435	108	u1* u1_array, u2* u2_array, constantPoolHandle cp, TRAPS);
duke@435	109	typeArrayOop parse_stackmap_table(u4 code_attribute_length, TRAPS);
duke@435	110
duke@435	111	// Classfile attribute parsing
duke@435	112	void parse_classfile_sourcefile_attribute(constantPoolHandle cp, instanceKlassHandle k, TRAPS);
duke@435	113	void parse_classfile_source_debug_extension_attribute(constantPoolHandle cp,
duke@435	114	instanceKlassHandle k, int length, TRAPS);
duke@435	115	u2 parse_classfile_inner_classes_attribute(constantPoolHandle cp,
duke@435	116	instanceKlassHandle k, TRAPS);
duke@435	117	void parse_classfile_attributes(constantPoolHandle cp, instanceKlassHandle k, TRAPS);
duke@435	118	void parse_classfile_synthetic_attribute(constantPoolHandle cp, instanceKlassHandle k, TRAPS);
duke@435	119	void parse_classfile_signature_attribute(constantPoolHandle cp, instanceKlassHandle k, TRAPS);
duke@435	120
duke@435	121	// Annotations handling
duke@435	122	typeArrayHandle assemble_annotations(u1* runtime_visible_annotations,
duke@435	123	int runtime_visible_annotations_length,
duke@435	124	u1* runtime_invisible_annotations,
duke@435	125	int runtime_invisible_annotations_length, TRAPS);
duke@435	126
duke@435	127	// Final setup
jcoomes@1374	128	unsigned int compute_oop_map_count(instanceKlassHandle super,
jcoomes@1374	129	unsigned int nonstatic_oop_count,
jcoomes@1374	130	int first_nonstatic_oop_offset);
jcoomes@1374	131	void fill_oop_maps(instanceKlassHandle k,
jcoomes@1374	132	unsigned int nonstatic_oop_map_count,
jcoomes@1374	133	int* nonstatic_oop_offsets,
jcoomes@1374	134	unsigned int* nonstatic_oop_counts);
duke@435	135	void set_precomputed_flags(instanceKlassHandle k);
duke@435	136	objArrayHandle compute_transitive_interfaces(instanceKlassHandle super,
duke@435	137	objArrayHandle local_ifs, TRAPS);
duke@435	138
duke@435	139	// Special handling for certain classes.
duke@435	140	// Add the "discovered" field to java.lang.ref.Reference if
duke@435	141	// it does not exist.
duke@435	142	void java_lang_ref_Reference_fix_pre(typeArrayHandle* fields_ptr,
duke@435	143	constantPoolHandle cp, FieldAllocationCount *fac_ptr, TRAPS);
duke@435	144	// Adjust the field allocation counts for java.lang.Class to add
duke@435	145	// fake fields.
duke@435	146	void java_lang_Class_fix_pre(objArrayHandle* methods_ptr,
duke@435	147	FieldAllocationCount *fac_ptr, TRAPS);
duke@435	148	// Adjust the next_nonstatic_oop_offset to place the fake fields
duke@435	149	// before any Java fields.
duke@435	150	void java_lang_Class_fix_post(int* next_nonstatic_oop_offset);
jrose@1145	151	// Adjust the field allocation counts for java.dyn.MethodHandle to add
jrose@1145	152	// a fake address (void*) field.
jrose@1145	153	void java_dyn_MethodHandle_fix_pre(constantPoolHandle cp,
jrose@1145	154	typeArrayHandle* fields_ptr,
jrose@1145	155	FieldAllocationCount *fac_ptr, TRAPS);
duke@435	156
duke@435	157	// Format checker methods
duke@435	158	void classfile_parse_error(const char* msg, TRAPS);
duke@435	159	void classfile_parse_error(const char* msg, int index, TRAPS);
duke@435	160	void classfile_parse_error(const char* msg, const char *name, TRAPS);
duke@435	161	void classfile_parse_error(const char* msg, int index, const char *name, TRAPS);
duke@435	162	inline void guarantee_property(bool b, const char* msg, TRAPS) {
duke@435	163	if (!b) { classfile_parse_error(msg, CHECK); }
duke@435	164	}
duke@435	165
duke@435	166	inline void assert_property(bool b, const char* msg, TRAPS) {
duke@435	167	#ifdef ASSERT
duke@435	168	if (!b) { fatal(msg); }
duke@435	169	#endif
duke@435	170	}
duke@435	171
duke@435	172	inline void check_property(bool property, const char* msg, int index, TRAPS) {
duke@435	173	if (_need_verify) {
duke@435	174	guarantee_property(property, msg, index, CHECK);
duke@435	175	} else {
duke@435	176	assert_property(property, msg, CHECK);
duke@435	177	}
duke@435	178	}
duke@435	179
duke@435	180	inline void check_property(bool property, const char* msg, TRAPS) {
duke@435	181	if (_need_verify) {
duke@435	182	guarantee_property(property, msg, CHECK);
duke@435	183	} else {
duke@435	184	assert_property(property, msg, CHECK);
duke@435	185	}
duke@435	186	}
duke@435	187
duke@435	188	inline void guarantee_property(bool b, const char* msg, int index, TRAPS) {
duke@435	189	if (!b) { classfile_parse_error(msg, index, CHECK); }
duke@435	190	}
duke@435	191	inline void guarantee_property(bool b, const char* msg, const char *name, TRAPS) {
duke@435	192	if (!b) { classfile_parse_error(msg, name, CHECK); }
duke@435	193	}
duke@435	194	inline void guarantee_property(bool b, const char* msg, int index, const char *name, TRAPS) {
duke@435	195	if (!b) { classfile_parse_error(msg, index, name, CHECK); }
duke@435	196	}
duke@435	197
duke@435	198	bool is_supported_version(u2 major, u2 minor);
duke@435	199	bool has_illegal_visibility(jint flags);
duke@435	200
duke@435	201	void verify_constantvalue(int constantvalue_index, int signature_index, constantPoolHandle cp, TRAPS);
duke@435	202	void verify_legal_utf8(const unsigned char* buffer, int length, TRAPS);
duke@435	203	void verify_legal_class_name(symbolHandle name, TRAPS);
duke@435	204	void verify_legal_field_name(symbolHandle name, TRAPS);
duke@435	205	void verify_legal_method_name(symbolHandle name, TRAPS);
duke@435	206	void verify_legal_field_signature(symbolHandle fieldname, symbolHandle signature, TRAPS);
duke@435	207	int verify_legal_method_signature(symbolHandle methodname, symbolHandle signature, TRAPS);
duke@435	208	void verify_legal_class_modifiers(jint flags, TRAPS);
duke@435	209	void verify_legal_field_modifiers(jint flags, bool is_interface, TRAPS);
duke@435	210	void verify_legal_method_modifiers(jint flags, bool is_interface, symbolHandle name, TRAPS);
duke@435	211	bool verify_unqualified_name(char* name, unsigned int length, int type);
duke@435	212	char* skip_over_field_name(char* name, bool slash_ok, unsigned int length);
duke@435	213	char* skip_over_field_signature(char* signature, bool void_ok, unsigned int length, TRAPS);
duke@435	214
jrose@1145	215	bool is_anonymous() {
jrose@1145	216	assert(AnonymousClasses || _host_klass.is_null(), "");
jrose@1145	217	return _host_klass.not_null();
jrose@1145	218	}
jrose@866	219	bool has_cp_patch_at(int index) {
jrose@866	220	assert(AnonymousClasses, "");
jrose@866	221	assert(index >= 0, "oob");
jrose@866	222	return (_cp_patches != NULL
jrose@866	223	&& index < _cp_patches->length()
jrose@866	224	&& _cp_patches->adr_at(index)->not_null());
jrose@866	225	}
jrose@866	226	Handle cp_patch_at(int index) {
jrose@866	227	assert(has_cp_patch_at(index), "oob");
jrose@866	228	return _cp_patches->at(index);
jrose@866	229	}
jrose@866	230	Handle clear_cp_patch_at(int index) {
jrose@866	231	Handle patch = cp_patch_at(index);
jrose@866	232	_cp_patches->at_put(index, Handle());
jrose@866	233	assert(!has_cp_patch_at(index), "");
jrose@866	234	return patch;
jrose@866	235	}
jrose@866	236	void patch_constant_pool(constantPoolHandle cp, int index, Handle patch, TRAPS);
jrose@866	237
jrose@866	238	// Wrapper for constantTag.is_klass_[or_]reference.
jrose@866	239	// In older versions of the VM, klassOops cannot sneak into early phases of
jrose@866	240	// constant pool construction, but in later versions they can.
jrose@866	241	// %%% Let's phase out the old is_klass_reference.
jrose@866	242	bool is_klass_reference(constantPoolHandle cp, int index) {
jrose@866	243	return ((LinkWellKnownClasses || AnonymousClasses)
jrose@866	244	? cp->tag_at(index).is_klass_or_reference()
jrose@866	245	: cp->tag_at(index).is_klass_reference());
jrose@866	246	}
jrose@866	247
duke@435	248	public:
duke@435	249	// Constructor
duke@435	250	ClassFileParser(ClassFileStream* st) { set_stream(st); }
duke@435	251
duke@435	252	// Parse .class file and return new klassOop. The klassOop is not hooked up
duke@435	253	// to the system dictionary or any other structures, so a .class file can
duke@435	254	// be loaded several times if desired.
duke@435	255	// The system dictionary hookup is done by the caller.
duke@435	256	//
duke@435	257	// "parsed_name" is updated by this method, and is the name found
duke@435	258	// while parsing the stream.
duke@435	259	instanceKlassHandle parseClassFile(symbolHandle name,
duke@435	260	Handle class_loader,
duke@435	261	Handle protection_domain,
duke@435	262	symbolHandle& parsed_name,
jrose@866	263	TRAPS) {
jrose@1145	264	KlassHandle no_host_klass;
jrose@1145	265	return parseClassFile(name, class_loader, protection_domain, no_host_klass, NULL, parsed_name, THREAD);
jrose@866	266	}
jrose@866	267	instanceKlassHandle parseClassFile(symbolHandle name,
jrose@866	268	Handle class_loader,
jrose@866	269	Handle protection_domain,
jrose@1145	270	KlassHandle host_klass,
jrose@866	271	GrowableArray<Handle>* cp_patches,
jrose@866	272	symbolHandle& parsed_name,
duke@435	273	TRAPS);
duke@435	274
duke@435	275	// Verifier checks
duke@435	276	static void check_super_class_access(instanceKlassHandle this_klass, TRAPS);
duke@435	277	static void check_super_interface_access(instanceKlassHandle this_klass, TRAPS);
duke@435	278	static void check_final_method_override(instanceKlassHandle this_klass, TRAPS);
duke@435	279	static void check_illegal_static_method(instanceKlassHandle this_klass, TRAPS);
duke@435	280	};