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comparison src/share/vm/interpreter/bytecodeStream.hpp @ 726:be93aad57795

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6655646: dynamic languages need dynamically linked call sites Summary: invokedynamic instruction (JSR 292 RI) Reviewed-by: twisti, never
author jrose
date Tue, 21 Apr 2009 23:21:04 -0700
parents a61af66fc99e
children bd02caa94611
comparison
equal deleted inserted replaced
725:928912ce8438 726:be93aad57795
107 int next_bci() const { return _next_bci; } 107 int next_bci() const { return _next_bci; }
108 int end_bci() const { return _end_bci; } 108 int end_bci() const { return _end_bci; }
109 109
110 Bytecodes::Code code() const { return _code; } 110 Bytecodes::Code code() const { return _code; }
111 bool is_wide() const { return _is_wide; } 111 bool is_wide() const { return _is_wide; }
112 int instruction_size() const { return (_next_bci - _bci); }
112 bool is_last_bytecode() const { return _next_bci >= _end_bci; } 113 bool is_last_bytecode() const { return _next_bci >= _end_bci; }
113 114
114 address bcp() const { return method()->code_base() + _bci; } 115 address bcp() const { return method()->code_base() + _bci; }
115 address next_bcp() { return method()->code_base() + _next_bci; } 116 address next_bcp() { return method()->code_base() + _next_bci; }
116 117
120 // Bytecode-specific attributes 121 // Bytecode-specific attributes
121 int dest() const { return bci() + (short)Bytes::get_Java_u2(bcp() + 1); } 122 int dest() const { return bci() + (short)Bytes::get_Java_u2(bcp() + 1); }
122 int dest_w() const { return bci() + (int )Bytes::get_Java_u4(bcp() + 1); } 123 int dest_w() const { return bci() + (int )Bytes::get_Java_u4(bcp() + 1); }
123 124
124 // Unsigned indices, widening 125 // Unsigned indices, widening
125 int get_index() const { return (is_wide()) ? Bytes::get_Java_u2(bcp() + 2) : bcp()[1]; } 126 int get_index() const { assert_index_size(is_wide() ? 2 : 1);
126 int get_index_big() const { return (int)Bytes::get_Java_u2(bcp() + 1); } 127 return (is_wide()) ? Bytes::get_Java_u2(bcp() + 2) : bcp()[1]; }
128 int get_index_big() const { assert_index_size(2);
129 return (int)Bytes::get_Java_u2(bcp() + 1); }
130 int get_index_int() const { return has_giant_index() ? get_index_giant() : get_index_big(); }
131 int get_index_giant() const { assert_index_size(4); return Bytes::get_native_u4(bcp() + 1); }
132 int has_giant_index() const { return (code() == Bytecodes::_invokedynamic); }
133
134 private:
135 void assert_index_size(int required_size) const {
136 #ifdef ASSERT
137 int isize = instruction_size() - (int)_is_wide - 1;
138 if (isize == 2 && code() == Bytecodes::_iinc)
139 isize = 1;
140 else if (isize <= 2)
141 ; // no change
142 else if (has_giant_index())
143 isize = 4;
144 else
145 isize = 2;
146 assert(isize = required_size, "wrong index size");
147 #endif
148 }
127 }; 149 };
128 150
129 // In BytecodeStream, non-java bytecodes will be translated into the 151 // In BytecodeStream, non-java bytecodes will be translated into the
130 // corresponding java bytecodes. 152 // corresponding java bytecodes.
131 153