Mercurial > hg > graal-jvmci-8
diff src/share/vm/interpreter/bytecode.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 | be93aad57795 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/share/vm/interpreter/bytecode.hpp Sat Dec 01 00:00:00 2007 +0000 @@ -0,0 +1,376 @@ +/* + * Copyright 1997-2002 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. + * + */ + +// Base class for different kinds of abstractions working +// relative to an objects 'this' pointer. + +class ThisRelativeObj VALUE_OBJ_CLASS_SPEC { + private: + int sign_extend (int x, int size) const { const int s = (BytesPerInt - size)*BitsPerByte; return (x << s) >> s; } + + public: + // Address computation + address addr_at (int offset) const { return (address)this + offset; } + address aligned_addr_at (int offset) const { return (address)round_to((intptr_t)addr_at(offset), jintSize); } + int aligned_offset (int offset) const { return aligned_addr_at(offset) - addr_at(0); } + + // Java unsigned accessors (using Java spec byte ordering) + int java_byte_at (int offset) const { return *(jubyte*)addr_at(offset); } + int java_hwrd_at (int offset) const { return java_byte_at(offset) << (1 * BitsPerByte) | java_byte_at(offset + 1); } + int java_word_at (int offset) const { return java_hwrd_at(offset) << (2 * BitsPerByte) | java_hwrd_at(offset + 2); } + + // Java signed accessors (using Java spec byte ordering) + int java_signed_byte_at(int offset) const { return sign_extend(java_byte_at(offset), 1); } + int java_signed_hwrd_at(int offset) const { return sign_extend(java_hwrd_at(offset), 2); } + int java_signed_word_at(int offset) const { return java_word_at(offset) ; } + + // Fast accessors (using the machine's natural byte ordering) + int fast_byte_at (int offset) const { return *(jubyte *)addr_at(offset); } + int fast_hwrd_at (int offset) const { return *(jushort*)addr_at(offset); } + int fast_word_at (int offset) const { return *(juint *)addr_at(offset); } + + // Fast signed accessors (using the machine's natural byte ordering) + int fast_signed_byte_at(int offset) const { return *(jbyte *)addr_at(offset); } + int fast_signed_hwrd_at(int offset) const { return *(jshort*)addr_at(offset); } + int fast_signed_word_at(int offset) const { return *(jint *)addr_at(offset); } + + // Fast manipulators (using the machine's natural byte ordering) + void set_fast_byte_at (int offset, int x) const { *(jbyte *)addr_at(offset) = (jbyte )x; } + void set_fast_hwrd_at (int offset, int x) const { *(jshort*)addr_at(offset) = (jshort)x; } + void set_fast_word_at (int offset, int x) const { *(jint *)addr_at(offset) = (jint )x; } +}; + + +// The base class for different kinds of bytecode abstractions. +// Provides the primitive operations to manipulate code relative +// to an objects 'this' pointer. +// +// Note: Even though it seems that the fast_index & set_fast_index +// functions are machine specific, they're not. They only use +// the natural way to store a 16bit index on a given machine, +// independent of the particular byte ordering. Since all other +// places in the system that refer to these indices use the +// same method (the natural byte ordering on the platform) +// this will always work and be machine-independent). + +class Bytecode: public ThisRelativeObj { + protected: + u_char byte_at(int offset) const { return *addr_at(offset); } + bool check_must_rewrite() const; + + public: + // Attributes + address bcp() const { return addr_at(0); } + address next_bcp() const { return addr_at(0) + Bytecodes::length_at(bcp()); } + + Bytecodes::Code code() const { return Bytecodes::code_at(addr_at(0)); } + Bytecodes::Code java_code() const { return Bytecodes::java_code(code()); } + bool must_rewrite() const { return Bytecodes::can_rewrite(code()) && check_must_rewrite(); } + bool is_active_breakpoint() const { return Bytecodes::is_active_breakpoint_at(bcp()); } + + int one_byte_index() const { return byte_at(1); } + int two_byte_index() const { return (byte_at(1) << 8) + byte_at(2); } + int offset() const { return (two_byte_index() << 16) >> 16; } + address destination() const { return bcp() + offset(); } + int fast_index() const { return Bytes::get_native_u2(addr_at(1)); } + + // Attribute modification + void set_code(Bytecodes::Code code); + void set_fast_index(int i); + + // Creation + inline friend Bytecode* Bytecode_at(address bcp); +}; + +inline Bytecode* Bytecode_at(address bcp) { + return (Bytecode*)bcp; +} + + +// Abstractions for lookupswitch bytecode + +class LookupswitchPair: ThisRelativeObj { + private: + int _match; + int _offset; + + public: + int match() const { return java_signed_word_at(0 * jintSize); } + int offset() const { return java_signed_word_at(1 * jintSize); } +}; + + +class Bytecode_lookupswitch: public Bytecode { + public: + void verify() const PRODUCT_RETURN; + + // Attributes + int default_offset() const { return java_signed_word_at(aligned_offset(1 + 0*jintSize)); } + int number_of_pairs() const { return java_signed_word_at(aligned_offset(1 + 1*jintSize)); } + LookupswitchPair* pair_at(int i) const { assert(0 <= i && i < number_of_pairs(), "pair index out of bounds"); + return (LookupswitchPair*)aligned_addr_at(1 + (1 + i)*2*jintSize); } + // Creation + inline friend Bytecode_lookupswitch* Bytecode_lookupswitch_at(address bcp); +}; + +inline Bytecode_lookupswitch* Bytecode_lookupswitch_at(address bcp) { + Bytecode_lookupswitch* b = (Bytecode_lookupswitch*)bcp; + debug_only(b->verify()); + return b; +} + + +class Bytecode_tableswitch: public Bytecode { + public: + void verify() const PRODUCT_RETURN; + + // Attributes + int default_offset() const { return java_signed_word_at(aligned_offset(1 + 0*jintSize)); } + int low_key() const { return java_signed_word_at(aligned_offset(1 + 1*jintSize)); } + int high_key() const { return java_signed_word_at(aligned_offset(1 + 2*jintSize)); } + int dest_offset_at(int i) const; + int length() { return high_key()-low_key()+1; } + + // Creation + inline friend Bytecode_tableswitch* Bytecode_tableswitch_at(address bcp); +}; + +inline Bytecode_tableswitch* Bytecode_tableswitch_at(address bcp) { + Bytecode_tableswitch* b = (Bytecode_tableswitch*)bcp; + debug_only(b->verify()); + return b; +} + + +// Abstraction for invoke_{virtual, static, interface, special} + +class Bytecode_invoke: public ResourceObj { + protected: + methodHandle _method; // method containing the bytecode + int _bci; // position of the bytecode + + Bytecode_invoke(methodHandle method, int bci) : _method(method), _bci(bci) {} + + public: + void verify() const; + + // Attributes + methodHandle method() const { return _method; } + int bci() const { return _bci; } + address bcp() const { return _method->bcp_from(bci()); } + + int index() const; // the constant pool index for the invoke + symbolOop name() const; // returns the name of the invoked method + symbolOop signature() const; // returns the signature of the invoked method + BasicType result_type(Thread *thread) const; // returns the result type of the invoke + + Bytecodes::Code code() const { return Bytecodes::code_at(bcp(), _method()); } + Bytecodes::Code adjusted_invoke_code() const { return Bytecodes::java_code(code()); } + + methodHandle static_target(TRAPS); // "specified" method (from constant pool) + + // Testers + bool is_invokeinterface() const { return adjusted_invoke_code() == Bytecodes::_invokeinterface; } + bool is_invokevirtual() const { return adjusted_invoke_code() == Bytecodes::_invokevirtual; } + bool is_invokestatic() const { return adjusted_invoke_code() == Bytecodes::_invokestatic; } + bool is_invokespecial() const { return adjusted_invoke_code() == Bytecodes::_invokespecial; } + + bool is_valid() const { return is_invokeinterface() || + is_invokevirtual() || + is_invokestatic() || + is_invokespecial(); } + + // Creation + inline friend Bytecode_invoke* Bytecode_invoke_at(methodHandle method, int bci); + + // Like Bytecode_invoke_at. Instead it returns NULL if the bci is not at an invoke. + inline friend Bytecode_invoke* Bytecode_invoke_at_check(methodHandle method, int bci); +}; + +inline Bytecode_invoke* Bytecode_invoke_at(methodHandle method, int bci) { + Bytecode_invoke* b = new Bytecode_invoke(method, bci); + debug_only(b->verify()); + return b; +} + +inline Bytecode_invoke* Bytecode_invoke_at_check(methodHandle method, int bci) { + Bytecode_invoke* b = new Bytecode_invoke(method, bci); + return b->is_valid() ? b : NULL; +} + + +// Abstraction for all field accesses (put/get field/static_ +class Bytecode_field: public Bytecode { +public: + void verify() const; + + int index() const; + bool is_static() const; + + // Creation + inline friend Bytecode_field* Bytecode_field_at(const methodOop method, address bcp); +}; + +inline Bytecode_field* Bytecode_field_at(const methodOop method, address bcp) { + Bytecode_field* b = (Bytecode_field*)bcp; + debug_only(b->verify()); + return b; +} + + +// Abstraction for {get,put}static + +class Bytecode_static: public Bytecode { + public: + void verify() const; + + // Returns the result type of the send by inspecting the field ref + BasicType result_type(methodOop method) const; + + // Creation + inline friend Bytecode_static* Bytecode_static_at(const methodOop method, address bcp); +}; + +inline Bytecode_static* Bytecode_static_at(const methodOop method, address bcp) { + Bytecode_static* b = (Bytecode_static*)bcp; + debug_only(b->verify()); + return b; +} + + +// Abstraction for checkcast + +class Bytecode_checkcast: public Bytecode { + public: + void verify() const { assert(Bytecodes::java_code(code()) == Bytecodes::_checkcast, "check checkcast"); } + + // Returns index + long index() const { return java_hwrd_at(1); }; + + // Creation + inline friend Bytecode_checkcast* Bytecode_checkcast_at(address bcp); +}; + +inline Bytecode_checkcast* Bytecode_checkcast_at(address bcp) { + Bytecode_checkcast* b = (Bytecode_checkcast*)bcp; + debug_only(b->verify()); + return b; +} + + +// Abstraction for instanceof + +class Bytecode_instanceof: public Bytecode { + public: + void verify() const { assert(code() == Bytecodes::_instanceof, "check instanceof"); } + + // Returns index + long index() const { return java_hwrd_at(1); }; + + // Creation + inline friend Bytecode_instanceof* Bytecode_instanceof_at(address bcp); +}; + +inline Bytecode_instanceof* Bytecode_instanceof_at(address bcp) { + Bytecode_instanceof* b = (Bytecode_instanceof*)bcp; + debug_only(b->verify()); + return b; +} + + +class Bytecode_new: public Bytecode { + public: + void verify() const { assert(java_code() == Bytecodes::_new, "check new"); } + + // Returns index + long index() const { return java_hwrd_at(1); }; + + // Creation + inline friend Bytecode_new* Bytecode_new_at(address bcp); +}; + +inline Bytecode_new* Bytecode_new_at(address bcp) { + Bytecode_new* b = (Bytecode_new*)bcp; + debug_only(b->verify()); + return b; +} + + +class Bytecode_multianewarray: public Bytecode { + public: + void verify() const { assert(java_code() == Bytecodes::_multianewarray, "check new"); } + + // Returns index + long index() const { return java_hwrd_at(1); }; + + // Creation + inline friend Bytecode_multianewarray* Bytecode_multianewarray_at(address bcp); +}; + +inline Bytecode_multianewarray* Bytecode_multianewarray_at(address bcp) { + Bytecode_multianewarray* b = (Bytecode_multianewarray*)bcp; + debug_only(b->verify()); + return b; +} + + +class Bytecode_anewarray: public Bytecode { + public: + void verify() const { assert(java_code() == Bytecodes::_anewarray, "check anewarray"); } + + // Returns index + long index() const { return java_hwrd_at(1); }; + + // Creation + inline friend Bytecode_anewarray* Bytecode_anewarray_at(address bcp); +}; + +inline Bytecode_anewarray* Bytecode_anewarray_at(address bcp) { + Bytecode_anewarray* b = (Bytecode_anewarray*)bcp; + debug_only(b->verify()); + return b; +} + + +// Abstraction for ldc, ldc_w and ldc2_w + +class Bytecode_loadconstant: public Bytecode { + public: + void verify() const { + Bytecodes::Code stdc = Bytecodes::java_code(code()); + assert(stdc == Bytecodes::_ldc || + stdc == Bytecodes::_ldc_w || + stdc == Bytecodes::_ldc2_w, "load constant"); + } + + int index() const; + + inline friend Bytecode_loadconstant* Bytecode_loadconstant_at(const methodOop method, address bcp); +}; + +inline Bytecode_loadconstant* Bytecode_loadconstant_at(const methodOop method, address bcp) { + Bytecode_loadconstant* b = (Bytecode_loadconstant*)bcp; + debug_only(b->verify()); + return b; +}