• file
• revisions
• annotate
• diff
• comparison
• raw

src/share/vm/classfile/verifier.hpp@a61af66fc99e (annotated)

src/share/vm/classfile/verifier.hpp

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

author

duke

date

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

changeset 435

a61af66fc99e

child 1408

ad6585fd4087

permissions

-rw-r--r--

Initial load

duke@435	1	/*
duke@435	2	* Copyright 1998-2006 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	// The verifier class
duke@435	26	class Verifier : AllStatic {
duke@435	27	public:
duke@435	28	enum { STACKMAP_ATTRIBUTE_MAJOR_VERSION = 50 };
duke@435	29	typedef enum { ThrowException, NoException } Mode;
duke@435	30
duke@435	31	/**
duke@435	32	* Verify the bytecodes for a class. If 'throw_exception' is true
duke@435	33	* then the appropriate VerifyError or ClassFormatError will be thrown.
duke@435	34	* Otherwise, no exception is thrown and the return indicates the
duke@435	35	* error.
duke@435	36	*/
duke@435	37	static bool verify(instanceKlassHandle klass, Mode mode, TRAPS);
duke@435	38
duke@435	39	// Return false if the class is loaded by the bootstrap loader.
duke@435	40	static bool should_verify_for(oop class_loader);
duke@435	41
duke@435	42	// Relax certain verifier checks to enable some broken 1.1 apps to run on 1.2.
duke@435	43	static bool relax_verify_for(oop class_loader);
duke@435	44
duke@435	45	private:
duke@435	46	static bool is_eligible_for_verification(instanceKlassHandle klass);
duke@435	47	static symbolHandle inference_verify(
duke@435	48	instanceKlassHandle klass, char* msg, size_t msg_len, TRAPS);
duke@435	49	};
duke@435	50
duke@435	51	class RawBytecodeStream;
duke@435	52	class StackMapFrame;
duke@435	53	class StackMapTable;
duke@435	54
duke@435	55	// Summary of verifier's memory usage:
duke@435	56	// StackMapTable is stack allocated.
duke@435	57	// StackMapFrame are resource allocated. There is one ResourceMark
duke@435	58	// for each method.
duke@435	59	// There is one mutable StackMapFrame (current_frame) which is updated
duke@435	60	// by abstract bytecode interpretation. frame_in_exception_handler() returns
duke@435	61	// a frame that has a mutable one-item stack (ready for pushing the
duke@435	62	// catch type exception object). All the other StackMapFrame's
duke@435	63	// are immutable (including their locals and stack arrays) after
duke@435	64	// their constructions.
duke@435	65	// locals/stack arrays in StackMapFrame are resource allocated.
duke@435	66	// locals/stack arrays can be shared between StackMapFrame's, except
duke@435	67	// the mutable StackMapFrame (current_frame).
duke@435	68	// Care needs to be taken to make sure resource objects don't outlive
duke@435	69	// the lifetime of their ResourceMark.
duke@435	70
duke@435	71	// These macros are used similarly to CHECK macros but also check
duke@435	72	// the status of the verifier and return if that has an error.
duke@435	73	#define CHECK_VERIFY(verifier) \
duke@435	74	CHECK); if ((verifier)->has_error()) return; (0
duke@435	75	#define CHECK_VERIFY_(verifier, result) \
duke@435	76	CHECK_(result)); if ((verifier)->has_error()) return (result); (0
duke@435	77
duke@435	78	// A new instance of this class is created for each class being verified
duke@435	79	class ClassVerifier : public StackObj {
duke@435	80	private:
duke@435	81	Thread* _thread;
duke@435	82	symbolHandle _exception_type;
duke@435	83	char* _message;
duke@435	84	size_t _message_buffer_len;
duke@435	85
duke@435	86	void verify_method(methodHandle method, TRAPS);
duke@435	87	char* generate_code_data(methodHandle m, u4 code_length, TRAPS);
duke@435	88	void verify_exception_handler_table(u4 code_length, char* code_data, int& min, int& max, TRAPS);
duke@435	89	void verify_local_variable_table(u4 code_length, char* code_data, TRAPS);
duke@435	90
duke@435	91	VerificationType cp_ref_index_to_type(
duke@435	92	int index, constantPoolHandle cp, TRAPS) {
duke@435	93	return cp_index_to_type(cp->klass_ref_index_at(index), cp, THREAD);
duke@435	94	}
duke@435	95
duke@435	96	bool is_protected_access(
duke@435	97	instanceKlassHandle this_class, klassOop target_class,
duke@435	98	symbolOop field_name, symbolOop field_sig, bool is_method);
duke@435	99
duke@435	100	void verify_cp_index(constantPoolHandle cp, int index, TRAPS);
duke@435	101	void verify_cp_type(
duke@435	102	int index, constantPoolHandle cp, unsigned int types, TRAPS);
duke@435	103	void verify_cp_class_type(int index, constantPoolHandle cp, TRAPS);
duke@435	104
duke@435	105	u2 verify_stackmap_table(
duke@435	106	u2 stackmap_index, u2 bci, StackMapFrame* current_frame,
duke@435	107	StackMapTable* stackmap_table, bool no_control_flow, TRAPS);
duke@435	108
duke@435	109	void verify_exception_handler_targets(
duke@435	110	u2 bci, bool this_uninit, StackMapFrame* current_frame,
duke@435	111	StackMapTable* stackmap_table, TRAPS);
duke@435	112
duke@435	113	void verify_ldc(
duke@435	114	int opcode, u2 index, StackMapFrame *current_frame,
duke@435	115	constantPoolHandle cp, u2 bci, TRAPS);
duke@435	116
duke@435	117	void verify_switch(
duke@435	118	RawBytecodeStream* bcs, u4 code_length, char* code_data,
duke@435	119	StackMapFrame* current_frame, StackMapTable* stackmap_table, TRAPS);
duke@435	120
duke@435	121	void verify_field_instructions(
duke@435	122	RawBytecodeStream* bcs, StackMapFrame* current_frame,
duke@435	123	constantPoolHandle cp, TRAPS);
duke@435	124
duke@435	125	void verify_invoke_init(
duke@435	126	RawBytecodeStream* bcs, VerificationType ref_class_type,
duke@435	127	StackMapFrame* current_frame, u4 code_length, bool* this_uninit,
duke@435	128	constantPoolHandle cp, TRAPS);
duke@435	129
duke@435	130	void verify_invoke_instructions(
duke@435	131	RawBytecodeStream* bcs, u4 code_length, StackMapFrame* current_frame,
duke@435	132	bool* this_uninit, VerificationType return_type,
duke@435	133	constantPoolHandle cp, TRAPS);
duke@435	134
duke@435	135	VerificationType get_newarray_type(u2 index, u2 bci, TRAPS);
duke@435	136	void verify_anewarray(
duke@435	137	u2 index, constantPoolHandle cp, StackMapFrame* current_frame, TRAPS);
duke@435	138	void verify_return_value(
duke@435	139	VerificationType return_type, VerificationType type, u2 offset, TRAPS);
duke@435	140
duke@435	141	void verify_iload (u2 index, StackMapFrame* current_frame, TRAPS);
duke@435	142	void verify_lload (u2 index, StackMapFrame* current_frame, TRAPS);
duke@435	143	void verify_fload (u2 index, StackMapFrame* current_frame, TRAPS);
duke@435	144	void verify_dload (u2 index, StackMapFrame* current_frame, TRAPS);
duke@435	145	void verify_aload (u2 index, StackMapFrame* current_frame, TRAPS);
duke@435	146	void verify_istore(u2 index, StackMapFrame* current_frame, TRAPS);
duke@435	147	void verify_lstore(u2 index, StackMapFrame* current_frame, TRAPS);
duke@435	148	void verify_fstore(u2 index, StackMapFrame* current_frame, TRAPS);
duke@435	149	void verify_dstore(u2 index, StackMapFrame* current_frame, TRAPS);
duke@435	150	void verify_astore(u2 index, StackMapFrame* current_frame, TRAPS);
duke@435	151	void verify_iinc (u2 index, StackMapFrame* current_frame, TRAPS);
duke@435	152
duke@435	153	bool name_in_supers(symbolOop ref_name, instanceKlassHandle current);
duke@435	154
duke@435	155	instanceKlassHandle _klass; // the class being verified
duke@435	156	methodHandle _method; // current method being verified
duke@435	157	VerificationType _this_type; // the verification type of the current class
duke@435	158
duke@435	159	public:
duke@435	160	enum {
duke@435	161	BYTECODE_OFFSET = 1,
duke@435	162	NEW_OFFSET = 2
duke@435	163	};
duke@435	164
duke@435	165	// constructor
duke@435	166	ClassVerifier(instanceKlassHandle klass, char* msg, size_t msg_len, TRAPS);
duke@435	167
duke@435	168	// destructor
duke@435	169	~ClassVerifier();
duke@435	170
duke@435	171	Thread* thread() { return _thread; }
duke@435	172	methodHandle method() { return _method; }
duke@435	173	instanceKlassHandle current_class() const { return _klass; }
duke@435	174	VerificationType current_type() const { return _this_type; }
duke@435	175
duke@435	176	// Verifies the class. If a verify or class file format error occurs,
duke@435	177	// the '_exception_name' symbols will set to the exception name and
duke@435	178	// the message_buffer will be filled in with the exception message.
duke@435	179	void verify_class(TRAPS);
duke@435	180
duke@435	181	// Return status modes
duke@435	182	symbolHandle result() const { return _exception_type; }
duke@435	183	bool has_error() const { return !(result().is_null()); }
duke@435	184
duke@435	185	// Called when verify or class format errors are encountered.
duke@435	186	// May throw an exception based upon the mode.
duke@435	187	void verify_error(u2 offset, const char* fmt, ...);
duke@435	188	void verify_error(const char* fmt, ...);
duke@435	189	void class_format_error(const char* fmt, ...);
duke@435	190	void format_error_message(const char* fmt, int offset, va_list args);
duke@435	191
duke@435	192	klassOop load_class(symbolHandle name, TRAPS);
duke@435	193
duke@435	194	int change_sig_to_verificationType(
duke@435	195	SignatureStream* sig_type, VerificationType* inference_type, TRAPS);
duke@435	196
duke@435	197	VerificationType cp_index_to_type(int index, constantPoolHandle cp, TRAPS) {
duke@435	198	return VerificationType::reference_type(
duke@435	199	symbolHandle(THREAD, cp->klass_name_at(index)));
duke@435	200	}
duke@435	201
duke@435	202	static bool _verify_verbose; // for debugging
duke@435	203	};
duke@435	204
duke@435	205	inline int ClassVerifier::change_sig_to_verificationType(
duke@435	206	SignatureStream* sig_type, VerificationType* inference_type, TRAPS) {
duke@435	207	BasicType bt = sig_type->type();
duke@435	208	switch (bt) {
duke@435	209	case T_OBJECT:
duke@435	210	case T_ARRAY:
duke@435	211	{
duke@435	212	symbolOop name = sig_type->as_symbol(CHECK_0);
duke@435	213	*inference_type =
duke@435	214	VerificationType::reference_type(symbolHandle(THREAD, name));
duke@435	215	return 1;
duke@435	216	}
duke@435	217	case T_LONG:
duke@435	218	*inference_type = VerificationType::long_type();
duke@435	219	*++inference_type = VerificationType::long2_type();
duke@435	220	return 2;
duke@435	221	case T_DOUBLE:
duke@435	222	*inference_type = VerificationType::double_type();
duke@435	223	*++inference_type = VerificationType::double2_type();
duke@435	224	return 2;
duke@435	225	case T_INT:
duke@435	226	case T_BOOLEAN:
duke@435	227	case T_BYTE:
duke@435	228	case T_CHAR:
duke@435	229	case T_SHORT:
duke@435	230	*inference_type = VerificationType::integer_type();
duke@435	231	return 1;
duke@435	232	case T_FLOAT:
duke@435	233	*inference_type = VerificationType::float_type();
duke@435	234	return 1;
duke@435	235	default:
duke@435	236	ShouldNotReachHere();
duke@435	237	return 1;
duke@435	238	}
duke@435	239	}