Mercurial > hg > graal-compiler
view src/share/vm/classfile/verifier.hpp @ 477:24fda36852ce
6727377: VM stack guard pages on Windows should PAGE_READWRITE not PAGE_EXECUTE_READWRITE
Summary: Make reguard_stack change access to RW, not execute and use os::protect_memory with the new parameter when change needed to X.
Reviewed-by: acorn, jcoomes
author | coleenp |
---|---|
date | Wed, 10 Dec 2008 15:14:29 -0800 |
parents | a61af66fc99e |
children | ad6585fd4087 |
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/* * 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; } }