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src/share/vm/classfile/verifier.hpp@c18cbe5936b8 (annotated)

src/share/vm/classfile/verifier.hpp

Thu, 27 May 2010 19:08:38 -0700

author

trims

date

Thu, 27 May 2010 19:08:38 -0700

changeset 1907

c18cbe5936b8

parent 1408

ad6585fd4087

child 1934

e9ff18c4ace7

permissions

-rw-r--r--

6941466: Oracle rebranding changes for Hotspot repositories
Summary: Change all the Sun copyrights to Oracle copyright
Reviewed-by: ohair

duke@435	1	/*
trims@1907	2	* Copyright (c) 1998, 2006, 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
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	*/
acorn@1408	37	static bool verify(instanceKlassHandle klass, Mode mode, bool should_verify_class, TRAPS);
duke@435	38
acorn@1408	39	// Return false if the class is loaded by the bootstrap loader,
acorn@1408	40	// or if defineClass was called requesting skipping verification
acorn@1408	41	// -Xverify:all/none override this value
acorn@1408	42	static bool should_verify_for(oop class_loader, bool should_verify_class);
duke@435	43
duke@435	44	// Relax certain verifier checks to enable some broken 1.1 apps to run on 1.2.
duke@435	45	static bool relax_verify_for(oop class_loader);
duke@435	46
duke@435	47	private:
acorn@1408	48	static bool is_eligible_for_verification(instanceKlassHandle klass, bool should_verify_class);
duke@435	49	static symbolHandle inference_verify(
duke@435	50	instanceKlassHandle klass, char* msg, size_t msg_len, TRAPS);
duke@435	51	};
duke@435	52
duke@435	53	class RawBytecodeStream;
duke@435	54	class StackMapFrame;
duke@435	55	class StackMapTable;
duke@435	56
duke@435	57	// Summary of verifier's memory usage:
duke@435	58	// StackMapTable is stack allocated.
duke@435	59	// StackMapFrame are resource allocated. There is one ResourceMark
duke@435	60	// for each method.
duke@435	61	// There is one mutable StackMapFrame (current_frame) which is updated
duke@435	62	// by abstract bytecode interpretation. frame_in_exception_handler() returns
duke@435	63	// a frame that has a mutable one-item stack (ready for pushing the
duke@435	64	// catch type exception object). All the other StackMapFrame's
duke@435	65	// are immutable (including their locals and stack arrays) after
duke@435	66	// their constructions.
duke@435	67	// locals/stack arrays in StackMapFrame are resource allocated.
duke@435	68	// locals/stack arrays can be shared between StackMapFrame's, except
duke@435	69	// the mutable StackMapFrame (current_frame).
duke@435	70	// Care needs to be taken to make sure resource objects don't outlive
duke@435	71	// the lifetime of their ResourceMark.
duke@435	72
duke@435	73	// These macros are used similarly to CHECK macros but also check
duke@435	74	// the status of the verifier and return if that has an error.
duke@435	75	#define CHECK_VERIFY(verifier) \
duke@435	76	CHECK); if ((verifier)->has_error()) return; (0
duke@435	77	#define CHECK_VERIFY_(verifier, result) \
duke@435	78	CHECK_(result)); if ((verifier)->has_error()) return (result); (0
duke@435	79
duke@435	80	// A new instance of this class is created for each class being verified
duke@435	81	class ClassVerifier : public StackObj {
duke@435	82	private:
duke@435	83	Thread* _thread;
duke@435	84	symbolHandle _exception_type;
duke@435	85	char* _message;
duke@435	86	size_t _message_buffer_len;
duke@435	87
duke@435	88	void verify_method(methodHandle method, TRAPS);
duke@435	89	char* generate_code_data(methodHandle m, u4 code_length, TRAPS);
duke@435	90	void verify_exception_handler_table(u4 code_length, char* code_data, int& min, int& max, TRAPS);
duke@435	91	void verify_local_variable_table(u4 code_length, char* code_data, TRAPS);
duke@435	92
duke@435	93	VerificationType cp_ref_index_to_type(
duke@435	94	int index, constantPoolHandle cp, TRAPS) {
duke@435	95	return cp_index_to_type(cp->klass_ref_index_at(index), cp, THREAD);
duke@435	96	}
duke@435	97
duke@435	98	bool is_protected_access(
duke@435	99	instanceKlassHandle this_class, klassOop target_class,
duke@435	100	symbolOop field_name, symbolOop field_sig, bool is_method);
duke@435	101
duke@435	102	void verify_cp_index(constantPoolHandle cp, int index, TRAPS);
duke@435	103	void verify_cp_type(
duke@435	104	int index, constantPoolHandle cp, unsigned int types, TRAPS);
duke@435	105	void verify_cp_class_type(int index, constantPoolHandle cp, TRAPS);
duke@435	106
duke@435	107	u2 verify_stackmap_table(
duke@435	108	u2 stackmap_index, u2 bci, StackMapFrame* current_frame,
duke@435	109	StackMapTable* stackmap_table, bool no_control_flow, TRAPS);
duke@435	110
duke@435	111	void verify_exception_handler_targets(
duke@435	112	u2 bci, bool this_uninit, StackMapFrame* current_frame,
duke@435	113	StackMapTable* stackmap_table, TRAPS);
duke@435	114
duke@435	115	void verify_ldc(
duke@435	116	int opcode, u2 index, StackMapFrame *current_frame,
duke@435	117	constantPoolHandle cp, u2 bci, TRAPS);
duke@435	118
duke@435	119	void verify_switch(
duke@435	120	RawBytecodeStream* bcs, u4 code_length, char* code_data,
duke@435	121	StackMapFrame* current_frame, StackMapTable* stackmap_table, TRAPS);
duke@435	122
duke@435	123	void verify_field_instructions(
duke@435	124	RawBytecodeStream* bcs, StackMapFrame* current_frame,
duke@435	125	constantPoolHandle cp, TRAPS);
duke@435	126
duke@435	127	void verify_invoke_init(
duke@435	128	RawBytecodeStream* bcs, VerificationType ref_class_type,
duke@435	129	StackMapFrame* current_frame, u4 code_length, bool* this_uninit,
duke@435	130	constantPoolHandle cp, TRAPS);
duke@435	131
duke@435	132	void verify_invoke_instructions(
duke@435	133	RawBytecodeStream* bcs, u4 code_length, StackMapFrame* current_frame,
duke@435	134	bool* this_uninit, VerificationType return_type,
duke@435	135	constantPoolHandle cp, TRAPS);
duke@435	136
duke@435	137	VerificationType get_newarray_type(u2 index, u2 bci, TRAPS);
duke@435	138	void verify_anewarray(
duke@435	139	u2 index, constantPoolHandle cp, StackMapFrame* current_frame, TRAPS);
duke@435	140	void verify_return_value(
duke@435	141	VerificationType return_type, VerificationType type, u2 offset, TRAPS);
duke@435	142
duke@435	143	void verify_iload (u2 index, StackMapFrame* current_frame, TRAPS);
duke@435	144	void verify_lload (u2 index, StackMapFrame* current_frame, TRAPS);
duke@435	145	void verify_fload (u2 index, StackMapFrame* current_frame, TRAPS);
duke@435	146	void verify_dload (u2 index, StackMapFrame* current_frame, TRAPS);
duke@435	147	void verify_aload (u2 index, StackMapFrame* current_frame, TRAPS);
duke@435	148	void verify_istore(u2 index, StackMapFrame* current_frame, TRAPS);
duke@435	149	void verify_lstore(u2 index, StackMapFrame* current_frame, TRAPS);
duke@435	150	void verify_fstore(u2 index, StackMapFrame* current_frame, TRAPS);
duke@435	151	void verify_dstore(u2 index, StackMapFrame* current_frame, TRAPS);
duke@435	152	void verify_astore(u2 index, StackMapFrame* current_frame, TRAPS);
duke@435	153	void verify_iinc (u2 index, StackMapFrame* current_frame, TRAPS);
duke@435	154
duke@435	155	bool name_in_supers(symbolOop ref_name, instanceKlassHandle current);
duke@435	156
duke@435	157	instanceKlassHandle _klass; // the class being verified
duke@435	158	methodHandle _method; // current method being verified
duke@435	159	VerificationType _this_type; // the verification type of the current class
duke@435	160
duke@435	161	public:
duke@435	162	enum {
duke@435	163	BYTECODE_OFFSET = 1,
duke@435	164	NEW_OFFSET = 2
duke@435	165	};
duke@435	166
duke@435	167	// constructor
duke@435	168	ClassVerifier(instanceKlassHandle klass, char* msg, size_t msg_len, TRAPS);
duke@435	169
duke@435	170	// destructor
duke@435	171	~ClassVerifier();
duke@435	172
duke@435	173	Thread* thread() { return _thread; }
duke@435	174	methodHandle method() { return _method; }
duke@435	175	instanceKlassHandle current_class() const { return _klass; }
duke@435	176	VerificationType current_type() const { return _this_type; }
duke@435	177
duke@435	178	// Verifies the class. If a verify or class file format error occurs,
duke@435	179	// the '_exception_name' symbols will set to the exception name and
duke@435	180	// the message_buffer will be filled in with the exception message.
duke@435	181	void verify_class(TRAPS);
duke@435	182
duke@435	183	// Return status modes
duke@435	184	symbolHandle result() const { return _exception_type; }
duke@435	185	bool has_error() const { return !(result().is_null()); }
duke@435	186
duke@435	187	// Called when verify or class format errors are encountered.
duke@435	188	// May throw an exception based upon the mode.
duke@435	189	void verify_error(u2 offset, const char* fmt, ...);
duke@435	190	void verify_error(const char* fmt, ...);
duke@435	191	void class_format_error(const char* fmt, ...);
duke@435	192	void format_error_message(const char* fmt, int offset, va_list args);
duke@435	193
duke@435	194	klassOop load_class(symbolHandle name, TRAPS);
duke@435	195
duke@435	196	int change_sig_to_verificationType(
duke@435	197	SignatureStream* sig_type, VerificationType* inference_type, TRAPS);
duke@435	198
duke@435	199	VerificationType cp_index_to_type(int index, constantPoolHandle cp, TRAPS) {
duke@435	200	return VerificationType::reference_type(
duke@435	201	symbolHandle(THREAD, cp->klass_name_at(index)));
duke@435	202	}
duke@435	203
duke@435	204	static bool _verify_verbose; // for debugging
duke@435	205	};
duke@435	206
duke@435	207	inline int ClassVerifier::change_sig_to_verificationType(
duke@435	208	SignatureStream* sig_type, VerificationType* inference_type, TRAPS) {
duke@435	209	BasicType bt = sig_type->type();
duke@435	210	switch (bt) {
duke@435	211	case T_OBJECT:
duke@435	212	case T_ARRAY:
duke@435	213	{
duke@435	214	symbolOop name = sig_type->as_symbol(CHECK_0);
duke@435	215	*inference_type =
duke@435	216	VerificationType::reference_type(symbolHandle(THREAD, name));
duke@435	217	return 1;
duke@435	218	}
duke@435	219	case T_LONG:
duke@435	220	*inference_type = VerificationType::long_type();
duke@435	221	*++inference_type = VerificationType::long2_type();
duke@435	222	return 2;
duke@435	223	case T_DOUBLE:
duke@435	224	*inference_type = VerificationType::double_type();
duke@435	225	*++inference_type = VerificationType::double2_type();
duke@435	226	return 2;
duke@435	227	case T_INT:
duke@435	228	case T_BOOLEAN:
duke@435	229	case T_BYTE:
duke@435	230	case T_CHAR:
duke@435	231	case T_SHORT:
duke@435	232	*inference_type = VerificationType::integer_type();
duke@435	233	return 1;
duke@435	234	case T_FLOAT:
duke@435	235	*inference_type = VerificationType::float_type();
duke@435	236	return 1;
duke@435	237	default:
duke@435	238	ShouldNotReachHere();
duke@435	239	return 1;
duke@435	240	}
duke@435	241	}