Mercurial > hg > graal-compiler
diff src/share/vm/classfile/verifier.hpp @ 0:a61af66fc99e jdk7-b24
Initial load
author | duke |
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date | Sat, 01 Dec 2007 00:00:00 +0000 |
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children | ad6585fd4087 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/share/vm/classfile/verifier.hpp Sat Dec 01 00:00:00 2007 +0000 @@ -0,0 +1,239 @@ +/* + * Copyright 1998-2006 Sun Microsystems, Inc. All Rights Reserved. + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * This code is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 only, as + * published by the Free Software Foundation. + * + * This code is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * version 2 for more details (a copy is included in the LICENSE file that + * accompanied this code). + * + * You should have received a copy of the GNU General Public License version + * 2 along with this work; if not, write to the Free Software Foundation, + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. + * + * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, + * CA 95054 USA or visit www.sun.com if you need additional information or + * have any questions. + * + */ + +// The verifier class +class Verifier : AllStatic { + public: + enum { STACKMAP_ATTRIBUTE_MAJOR_VERSION = 50 }; + typedef enum { ThrowException, NoException } Mode; + + /** + * Verify the bytecodes for a class. If 'throw_exception' is true + * then the appropriate VerifyError or ClassFormatError will be thrown. + * Otherwise, no exception is thrown and the return indicates the + * error. + */ + static bool verify(instanceKlassHandle klass, Mode mode, TRAPS); + + // Return false if the class is loaded by the bootstrap loader. + static bool should_verify_for(oop class_loader); + + // Relax certain verifier checks to enable some broken 1.1 apps to run on 1.2. + static bool relax_verify_for(oop class_loader); + + private: + static bool is_eligible_for_verification(instanceKlassHandle klass); + static symbolHandle inference_verify( + instanceKlassHandle klass, char* msg, size_t msg_len, TRAPS); +}; + +class RawBytecodeStream; +class StackMapFrame; +class StackMapTable; + +// Summary of verifier's memory usage: +// StackMapTable is stack allocated. +// StackMapFrame are resource allocated. There is one ResourceMark +// for each method. +// There is one mutable StackMapFrame (current_frame) which is updated +// by abstract bytecode interpretation. frame_in_exception_handler() returns +// a frame that has a mutable one-item stack (ready for pushing the +// catch type exception object). All the other StackMapFrame's +// are immutable (including their locals and stack arrays) after +// their constructions. +// locals/stack arrays in StackMapFrame are resource allocated. +// locals/stack arrays can be shared between StackMapFrame's, except +// the mutable StackMapFrame (current_frame). +// Care needs to be taken to make sure resource objects don't outlive +// the lifetime of their ResourceMark. + +// These macros are used similarly to CHECK macros but also check +// the status of the verifier and return if that has an error. +#define CHECK_VERIFY(verifier) \ + CHECK); if ((verifier)->has_error()) return; (0 +#define CHECK_VERIFY_(verifier, result) \ + CHECK_(result)); if ((verifier)->has_error()) return (result); (0 + +// A new instance of this class is created for each class being verified +class ClassVerifier : public StackObj { + private: + Thread* _thread; + symbolHandle _exception_type; + char* _message; + size_t _message_buffer_len; + + void verify_method(methodHandle method, TRAPS); + char* generate_code_data(methodHandle m, u4 code_length, TRAPS); + void verify_exception_handler_table(u4 code_length, char* code_data, int& min, int& max, TRAPS); + void verify_local_variable_table(u4 code_length, char* code_data, TRAPS); + + VerificationType cp_ref_index_to_type( + int index, constantPoolHandle cp, TRAPS) { + return cp_index_to_type(cp->klass_ref_index_at(index), cp, THREAD); + } + + bool is_protected_access( + instanceKlassHandle this_class, klassOop target_class, + symbolOop field_name, symbolOop field_sig, bool is_method); + + void verify_cp_index(constantPoolHandle cp, int index, TRAPS); + void verify_cp_type( + int index, constantPoolHandle cp, unsigned int types, TRAPS); + void verify_cp_class_type(int index, constantPoolHandle cp, TRAPS); + + u2 verify_stackmap_table( + u2 stackmap_index, u2 bci, StackMapFrame* current_frame, + StackMapTable* stackmap_table, bool no_control_flow, TRAPS); + + void verify_exception_handler_targets( + u2 bci, bool this_uninit, StackMapFrame* current_frame, + StackMapTable* stackmap_table, TRAPS); + + void verify_ldc( + int opcode, u2 index, StackMapFrame *current_frame, + constantPoolHandle cp, u2 bci, TRAPS); + + void verify_switch( + RawBytecodeStream* bcs, u4 code_length, char* code_data, + StackMapFrame* current_frame, StackMapTable* stackmap_table, TRAPS); + + void verify_field_instructions( + RawBytecodeStream* bcs, StackMapFrame* current_frame, + constantPoolHandle cp, TRAPS); + + void verify_invoke_init( + RawBytecodeStream* bcs, VerificationType ref_class_type, + StackMapFrame* current_frame, u4 code_length, bool* this_uninit, + constantPoolHandle cp, TRAPS); + + void verify_invoke_instructions( + RawBytecodeStream* bcs, u4 code_length, StackMapFrame* current_frame, + bool* this_uninit, VerificationType return_type, + constantPoolHandle cp, TRAPS); + + VerificationType get_newarray_type(u2 index, u2 bci, TRAPS); + void verify_anewarray( + u2 index, constantPoolHandle cp, StackMapFrame* current_frame, TRAPS); + void verify_return_value( + VerificationType return_type, VerificationType type, u2 offset, TRAPS); + + void verify_iload (u2 index, StackMapFrame* current_frame, TRAPS); + void verify_lload (u2 index, StackMapFrame* current_frame, TRAPS); + void verify_fload (u2 index, StackMapFrame* current_frame, TRAPS); + void verify_dload (u2 index, StackMapFrame* current_frame, TRAPS); + void verify_aload (u2 index, StackMapFrame* current_frame, TRAPS); + void verify_istore(u2 index, StackMapFrame* current_frame, TRAPS); + void verify_lstore(u2 index, StackMapFrame* current_frame, TRAPS); + void verify_fstore(u2 index, StackMapFrame* current_frame, TRAPS); + void verify_dstore(u2 index, StackMapFrame* current_frame, TRAPS); + void verify_astore(u2 index, StackMapFrame* current_frame, TRAPS); + void verify_iinc (u2 index, StackMapFrame* current_frame, TRAPS); + + bool name_in_supers(symbolOop ref_name, instanceKlassHandle current); + + instanceKlassHandle _klass; // the class being verified + methodHandle _method; // current method being verified + VerificationType _this_type; // the verification type of the current class + + public: + enum { + BYTECODE_OFFSET = 1, + NEW_OFFSET = 2 + }; + + // constructor + ClassVerifier(instanceKlassHandle klass, char* msg, size_t msg_len, TRAPS); + + // destructor + ~ClassVerifier(); + + Thread* thread() { return _thread; } + methodHandle method() { return _method; } + instanceKlassHandle current_class() const { return _klass; } + VerificationType current_type() const { return _this_type; } + + // Verifies the class. If a verify or class file format error occurs, + // the '_exception_name' symbols will set to the exception name and + // the message_buffer will be filled in with the exception message. + void verify_class(TRAPS); + + // Return status modes + symbolHandle result() const { return _exception_type; } + bool has_error() const { return !(result().is_null()); } + + // Called when verify or class format errors are encountered. + // May throw an exception based upon the mode. + void verify_error(u2 offset, const char* fmt, ...); + void verify_error(const char* fmt, ...); + void class_format_error(const char* fmt, ...); + void format_error_message(const char* fmt, int offset, va_list args); + + klassOop load_class(symbolHandle name, TRAPS); + + int change_sig_to_verificationType( + SignatureStream* sig_type, VerificationType* inference_type, TRAPS); + + VerificationType cp_index_to_type(int index, constantPoolHandle cp, TRAPS) { + return VerificationType::reference_type( + symbolHandle(THREAD, cp->klass_name_at(index))); + } + + static bool _verify_verbose; // for debugging +}; + +inline int ClassVerifier::change_sig_to_verificationType( + SignatureStream* sig_type, VerificationType* inference_type, TRAPS) { + BasicType bt = sig_type->type(); + switch (bt) { + case T_OBJECT: + case T_ARRAY: + { + symbolOop name = sig_type->as_symbol(CHECK_0); + *inference_type = + VerificationType::reference_type(symbolHandle(THREAD, name)); + return 1; + } + case T_LONG: + *inference_type = VerificationType::long_type(); + *++inference_type = VerificationType::long2_type(); + return 2; + case T_DOUBLE: + *inference_type = VerificationType::double_type(); + *++inference_type = VerificationType::double2_type(); + return 2; + case T_INT: + case T_BOOLEAN: + case T_BYTE: + case T_CHAR: + case T_SHORT: + *inference_type = VerificationType::integer_type(); + return 1; + case T_FLOAT: + *inference_type = VerificationType::float_type(); + return 1; + default: + ShouldNotReachHere(); + return 1; + } +}