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src/share/vm/classfile/classFileParser.hpp@b099aaf51bf8 (annotated)

src/share/vm/classfile/classFileParser.hpp

Tue, 22 Mar 2011 13:36:33 -0700

author

jcoomes

date

Tue, 22 Mar 2011 13:36:33 -0700

changeset 2661

b099aaf51bf8

parent 2658

c7f3d0b4570f

child 2698

38fea01eb669

permissions

-rw-r--r--

6962931: move interned strings out of the perm gen
Reviewed-by: never, coleenp, ysr, jwilhelm

duke@435	1	/*
jrose@2639	2	* Copyright (c) 1997, 2011, 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
stefank@2314	25	#ifndef SHARE_VM_CLASSFILE_CLASSFILEPARSER_HPP
stefank@2314	26	#define SHARE_VM_CLASSFILE_CLASSFILEPARSER_HPP
stefank@2314	27
stefank@2314	28	#include "classfile/classFileStream.hpp"
stefank@2314	29	#include "memory/resourceArea.hpp"
stefank@2314	30	#include "oops/oop.inline.hpp"
stefank@2314	31	#include "oops/typeArrayOop.hpp"
stefank@2314	32	#include "runtime/handles.inline.hpp"
stefank@2314	33	#include "utilities/accessFlags.hpp"
stefank@2314	34
coleenp@2497	35	class TempNewSymbol;
duke@435	36	// Parser for for .class files
duke@435	37	//
duke@435	38	// The bytes describing the class file structure is read from a Stream object
duke@435	39
duke@435	40	class ClassFileParser VALUE_OBJ_CLASS_SPEC {
duke@435	41	private:
duke@435	42	bool _need_verify;
duke@435	43	bool _relax_verify;
duke@435	44	u2 _major_version;
duke@435	45	u2 _minor_version;
coleenp@2497	46	Symbol* _class_name;
jrose@1145	47	KlassHandle _host_klass;
jrose@866	48	GrowableArray<Handle>* _cp_patches; // overrides for CP entries
duke@435	49
duke@435	50	bool _has_finalizer;
duke@435	51	bool _has_empty_finalizer;
duke@435	52	bool _has_vanilla_constructor;
duke@435	53
jrose@2353	54	int _max_bootstrap_specifier_index;
jrose@2353	55
duke@435	56	enum { fixed_buffer_size = 128 };
duke@435	57	u_char linenumbertable_buffer[fixed_buffer_size];
duke@435	58
duke@435	59	ClassFileStream* _stream; // Actual input stream
duke@435	60
duke@435	61	enum { LegalClass, LegalField, LegalMethod }; // used to verify unqualified names
duke@435	62
duke@435	63	// Accessors
duke@435	64	ClassFileStream* stream() { return _stream; }
duke@435	65	void set_stream(ClassFileStream* st) { _stream = st; }
duke@435	66
duke@435	67	// Constant pool parsing
duke@435	68	void parse_constant_pool_entries(constantPoolHandle cp, int length, TRAPS);
duke@435	69
duke@435	70	constantPoolHandle parse_constant_pool(TRAPS);
duke@435	71
duke@435	72	// Interface parsing
duke@435	73	objArrayHandle parse_interfaces(constantPoolHandle cp,
duke@435	74	int length,
duke@435	75	Handle class_loader,
duke@435	76	Handle protection_domain,
coleenp@2497	77	Symbol* class_name,
duke@435	78	TRAPS);
duke@435	79
duke@435	80	// Field parsing
duke@435	81	void parse_field_attributes(constantPoolHandle cp, u2 attributes_count,
duke@435	82	bool is_static, u2 signature_index,
duke@435	83	u2* constantvalue_index_addr,
duke@435	84	bool* is_synthetic_addr,
duke@435	85	u2* generic_signature_index_addr,
duke@435	86	typeArrayHandle* field_annotations, TRAPS);
duke@435	87	typeArrayHandle parse_fields(constantPoolHandle cp, bool is_interface,
duke@435	88	struct FieldAllocationCount *fac,
duke@435	89	objArrayHandle* fields_annotations, TRAPS);
duke@435	90
duke@435	91	// Method parsing
duke@435	92	methodHandle parse_method(constantPoolHandle cp, bool is_interface,
duke@435	93	AccessFlags* promoted_flags,
duke@435	94	typeArrayHandle* method_annotations,
duke@435	95	typeArrayHandle* method_parameter_annotations,
duke@435	96	typeArrayHandle* method_default_annotations,
duke@435	97	TRAPS);
duke@435	98	objArrayHandle parse_methods (constantPoolHandle cp, bool is_interface,
duke@435	99	AccessFlags* promoted_flags,
duke@435	100	bool* has_final_method,
duke@435	101	objArrayOop* methods_annotations_oop,
duke@435	102	objArrayOop* methods_parameter_annotations_oop,
duke@435	103	objArrayOop* methods_default_annotations_oop,
duke@435	104	TRAPS);
duke@435	105	typeArrayHandle sort_methods (objArrayHandle methods,
duke@435	106	objArrayHandle methods_annotations,
duke@435	107	objArrayHandle methods_parameter_annotations,
duke@435	108	objArrayHandle methods_default_annotations,
duke@435	109	TRAPS);
duke@435	110	typeArrayHandle parse_exception_table(u4 code_length, u4 exception_table_length,
duke@435	111	constantPoolHandle cp, TRAPS);
duke@435	112	void parse_linenumber_table(
duke@435	113	u4 code_attribute_length, u4 code_length,
duke@435	114	CompressedLineNumberWriteStream** write_stream, TRAPS);
duke@435	115	u2* parse_localvariable_table(u4 code_length, u2 max_locals, u4 code_attribute_length,
duke@435	116	constantPoolHandle cp, u2* localvariable_table_length,
duke@435	117	bool isLVTT, TRAPS);
duke@435	118	u2* parse_checked_exceptions(u2* checked_exceptions_length, u4 method_attribute_length,
duke@435	119	constantPoolHandle cp, TRAPS);
duke@435	120	void parse_type_array(u2 array_length, u4 code_length, u4* u1_index, u4* u2_index,
duke@435	121	u1* u1_array, u2* u2_array, constantPoolHandle cp, TRAPS);
duke@435	122	typeArrayOop parse_stackmap_table(u4 code_attribute_length, TRAPS);
duke@435	123
duke@435	124	// Classfile attribute parsing
duke@435	125	void parse_classfile_sourcefile_attribute(constantPoolHandle cp, instanceKlassHandle k, TRAPS);
duke@435	126	void parse_classfile_source_debug_extension_attribute(constantPoolHandle cp,
duke@435	127	instanceKlassHandle k, int length, TRAPS);
duke@435	128	u2 parse_classfile_inner_classes_attribute(constantPoolHandle cp,
duke@435	129	instanceKlassHandle k, TRAPS);
duke@435	130	void parse_classfile_attributes(constantPoolHandle cp, instanceKlassHandle k, TRAPS);
duke@435	131	void parse_classfile_synthetic_attribute(constantPoolHandle cp, instanceKlassHandle k, TRAPS);
duke@435	132	void parse_classfile_signature_attribute(constantPoolHandle cp, instanceKlassHandle k, TRAPS);
jrose@2353	133	void parse_classfile_bootstrap_methods_attribute(constantPoolHandle cp, instanceKlassHandle k, u4 attribute_length, TRAPS);
duke@435	134
duke@435	135	// Annotations handling
duke@435	136	typeArrayHandle assemble_annotations(u1* runtime_visible_annotations,
duke@435	137	int runtime_visible_annotations_length,
duke@435	138	u1* runtime_invisible_annotations,
duke@435	139	int runtime_invisible_annotations_length, TRAPS);
duke@435	140
duke@435	141	// Final setup
jcoomes@1374	142	unsigned int compute_oop_map_count(instanceKlassHandle super,
jcoomes@1374	143	unsigned int nonstatic_oop_count,
jcoomes@1374	144	int first_nonstatic_oop_offset);
jcoomes@1374	145	void fill_oop_maps(instanceKlassHandle k,
jcoomes@1374	146	unsigned int nonstatic_oop_map_count,
jcoomes@1374	147	int* nonstatic_oop_offsets,
jcoomes@1374	148	unsigned int* nonstatic_oop_counts);
duke@435	149	void set_precomputed_flags(instanceKlassHandle k);
duke@435	150	objArrayHandle compute_transitive_interfaces(instanceKlassHandle super,
duke@435	151	objArrayHandle local_ifs, TRAPS);
duke@435	152
duke@435	153	// Special handling for certain classes.
duke@435	154	// Add the "discovered" field to java.lang.ref.Reference if
duke@435	155	// it does not exist.
duke@435	156	void java_lang_ref_Reference_fix_pre(typeArrayHandle* fields_ptr,
never@2658	157	constantPoolHandle cp,
never@2658	158	FieldAllocationCount *fac_ptr, TRAPS);
duke@435	159	// Adjust the field allocation counts for java.lang.Class to add
duke@435	160	// fake fields.
never@2658	161	void java_lang_Class_fix_pre(int* nonstatic_field_size,
never@2658	162	FieldAllocationCount *fac_ptr);
duke@435	163	// Adjust the next_nonstatic_oop_offset to place the fake fields
duke@435	164	// before any Java fields.
duke@435	165	void java_lang_Class_fix_post(int* next_nonstatic_oop_offset);
jrose@2639	166	// Adjust the field allocation counts for java.lang.invoke.MethodHandle to add
jrose@1145	167	// a fake address (void*) field.
jrose@2639	168	void java_lang_invoke_MethodHandle_fix_pre(constantPoolHandle cp,
twisti@2264	169	typeArrayHandle fields,
jrose@1145	170	FieldAllocationCount *fac_ptr, TRAPS);
duke@435	171
duke@435	172	// Format checker methods
duke@435	173	void classfile_parse_error(const char* msg, TRAPS);
duke@435	174	void classfile_parse_error(const char* msg, int index, TRAPS);
duke@435	175	void classfile_parse_error(const char* msg, const char *name, TRAPS);
duke@435	176	void classfile_parse_error(const char* msg, int index, const char *name, TRAPS);
duke@435	177	inline void guarantee_property(bool b, const char* msg, TRAPS) {
duke@435	178	if (!b) { classfile_parse_error(msg, CHECK); }
duke@435	179	}
duke@435	180
duke@435	181	inline void assert_property(bool b, const char* msg, TRAPS) {
duke@435	182	#ifdef ASSERT
duke@435	183	if (!b) { fatal(msg); }
duke@435	184	#endif
duke@435	185	}
duke@435	186
duke@435	187	inline void check_property(bool property, const char* msg, int index, TRAPS) {
duke@435	188	if (_need_verify) {
duke@435	189	guarantee_property(property, msg, index, CHECK);
duke@435	190	} else {
duke@435	191	assert_property(property, msg, CHECK);
duke@435	192	}
duke@435	193	}
duke@435	194
duke@435	195	inline void check_property(bool property, const char* msg, TRAPS) {
duke@435	196	if (_need_verify) {
duke@435	197	guarantee_property(property, msg, CHECK);
duke@435	198	} else {
duke@435	199	assert_property(property, msg, CHECK);
duke@435	200	}
duke@435	201	}
duke@435	202
duke@435	203	inline void guarantee_property(bool b, const char* msg, int index, TRAPS) {
duke@435	204	if (!b) { classfile_parse_error(msg, index, CHECK); }
duke@435	205	}
duke@435	206	inline void guarantee_property(bool b, const char* msg, const char *name, TRAPS) {
duke@435	207	if (!b) { classfile_parse_error(msg, name, CHECK); }
duke@435	208	}
duke@435	209	inline void guarantee_property(bool b, const char* msg, int index, const char *name, TRAPS) {
duke@435	210	if (!b) { classfile_parse_error(msg, index, name, CHECK); }
duke@435	211	}
duke@435	212
kamg@1941	213	void throwIllegalSignature(
coleenp@2497	214	const char* type, Symbol* name, Symbol* sig, TRAPS);
kamg@1941	215
duke@435	216	bool is_supported_version(u2 major, u2 minor);
duke@435	217	bool has_illegal_visibility(jint flags);
duke@435	218
duke@435	219	void verify_constantvalue(int constantvalue_index, int signature_index, constantPoolHandle cp, TRAPS);
duke@435	220	void verify_legal_utf8(const unsigned char* buffer, int length, TRAPS);
coleenp@2497	221	void verify_legal_class_name(Symbol* name, TRAPS);
coleenp@2497	222	void verify_legal_field_name(Symbol* name, TRAPS);
coleenp@2497	223	void verify_legal_method_name(Symbol* name, TRAPS);
coleenp@2497	224	void verify_legal_field_signature(Symbol* fieldname, Symbol* signature, TRAPS);
coleenp@2497	225	int verify_legal_method_signature(Symbol* methodname, Symbol* signature, TRAPS);
duke@435	226	void verify_legal_class_modifiers(jint flags, TRAPS);
duke@435	227	void verify_legal_field_modifiers(jint flags, bool is_interface, TRAPS);
coleenp@2497	228	void verify_legal_method_modifiers(jint flags, bool is_interface, Symbol* name, TRAPS);
duke@435	229	bool verify_unqualified_name(char* name, unsigned int length, int type);
duke@435	230	char* skip_over_field_name(char* name, bool slash_ok, unsigned int length);
duke@435	231	char* skip_over_field_signature(char* signature, bool void_ok, unsigned int length, TRAPS);
duke@435	232
jrose@1145	233	bool is_anonymous() {
jrose@1145	234	assert(AnonymousClasses || _host_klass.is_null(), "");
jrose@1145	235	return _host_klass.not_null();
jrose@1145	236	}
jrose@866	237	bool has_cp_patch_at(int index) {
jrose@866	238	assert(AnonymousClasses, "");
jrose@866	239	assert(index >= 0, "oob");
jrose@866	240	return (_cp_patches != NULL
jrose@866	241	&& index < _cp_patches->length()
jrose@866	242	&& _cp_patches->adr_at(index)->not_null());
jrose@866	243	}
jrose@866	244	Handle cp_patch_at(int index) {
jrose@866	245	assert(has_cp_patch_at(index), "oob");
jrose@866	246	return _cp_patches->at(index);
jrose@866	247	}
jrose@866	248	Handle clear_cp_patch_at(int index) {
jrose@866	249	Handle patch = cp_patch_at(index);
jrose@866	250	_cp_patches->at_put(index, Handle());
jrose@866	251	assert(!has_cp_patch_at(index), "");
jrose@866	252	return patch;
jrose@866	253	}
jrose@866	254	void patch_constant_pool(constantPoolHandle cp, int index, Handle patch, TRAPS);
jrose@866	255
jrose@866	256	// Wrapper for constantTag.is_klass_[or_]reference.
jrose@866	257	// In older versions of the VM, klassOops cannot sneak into early phases of
jrose@866	258	// constant pool construction, but in later versions they can.
jrose@866	259	// %%% Let's phase out the old is_klass_reference.
jrose@866	260	bool is_klass_reference(constantPoolHandle cp, int index) {
jrose@866	261	return ((LinkWellKnownClasses || AnonymousClasses)
jrose@866	262	? cp->tag_at(index).is_klass_or_reference()
jrose@866	263	: cp->tag_at(index).is_klass_reference());
jrose@866	264	}
jrose@866	265
duke@435	266	public:
duke@435	267	// Constructor
duke@435	268	ClassFileParser(ClassFileStream* st) { set_stream(st); }
duke@435	269
duke@435	270	// Parse .class file and return new klassOop. The klassOop is not hooked up
duke@435	271	// to the system dictionary or any other structures, so a .class file can
duke@435	272	// be loaded several times if desired.
duke@435	273	// The system dictionary hookup is done by the caller.
duke@435	274	//
duke@435	275	// "parsed_name" is updated by this method, and is the name found
duke@435	276	// while parsing the stream.
coleenp@2497	277	instanceKlassHandle parseClassFile(Symbol* name,
duke@435	278	Handle class_loader,
duke@435	279	Handle protection_domain,
coleenp@2497	280	TempNewSymbol& parsed_name,
acorn@1408	281	bool verify,
jrose@866	282	TRAPS) {
jrose@1145	283	KlassHandle no_host_klass;
acorn@1408	284	return parseClassFile(name, class_loader, protection_domain, no_host_klass, NULL, parsed_name, verify, THREAD);
jrose@866	285	}
coleenp@2497	286	instanceKlassHandle parseClassFile(Symbol* name,
jrose@866	287	Handle class_loader,
jrose@866	288	Handle protection_domain,
jrose@1145	289	KlassHandle host_klass,
jrose@866	290	GrowableArray<Handle>* cp_patches,
coleenp@2497	291	TempNewSymbol& parsed_name,
acorn@1408	292	bool verify,
duke@435	293	TRAPS);
duke@435	294
duke@435	295	// Verifier checks
duke@435	296	static void check_super_class_access(instanceKlassHandle this_klass, TRAPS);
duke@435	297	static void check_super_interface_access(instanceKlassHandle this_klass, TRAPS);
duke@435	298	static void check_final_method_override(instanceKlassHandle this_klass, TRAPS);
duke@435	299	static void check_illegal_static_method(instanceKlassHandle this_klass, TRAPS);
duke@435	300	};
stefank@2314	301
stefank@2314	302	#endif // SHARE_VM_CLASSFILE_CLASSFILEPARSER_HPP