| /* |
| * 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. |
| |
| 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()); } |
| int instruction_size() const { return 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 { assert_index_size(1); return byte_at(1); } |
| int two_byte_index() const { assert_index_size(2); return (byte_at(1) << 8) + byte_at(2); } |
| |
| int offset() const { return (two_byte_index() << 16) >> 16; } |
| address destination() const { return bcp() + offset(); } |
| |
| // Attribute modification |
| void set_code(Bytecodes::Code code); |
| |
| // Creation |
| inline friend Bytecode* Bytecode_at(address bcp); |
| |
| private: |
| void assert_index_size(int required_size) const { |
| #ifdef ASSERT |
| int isize = instruction_size() - 1; |
| if (isize == 2 && code() == Bytecodes::_iinc) |
| isize = 1; |
| else if (isize <= 2) |
| ; // no change |
| else if (code() == Bytecodes::_invokedynamic) |
| isize = 4; |
| else |
| isize = 2; |
| assert(isize = required_size, "wrong index size"); |
| #endif |
| } |
| }; |
| |
| 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_invokedynamic() const { return adjusted_invoke_code() == Bytecodes::_invokedynamic; } |
| |
| bool has_giant_index() const { return is_invokedynamic(); } |
| |
| 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; |
| } |