diff options
Diffstat (limited to 'src/share/vm/interpreter/bytecodes.cpp')
| -rw-r--r-- | src/share/vm/interpreter/bytecodes.cpp | 190 |
1 files changed, 132 insertions, 58 deletions
diff --git a/src/share/vm/interpreter/bytecodes.cpp b/src/share/vm/interpreter/bytecodes.cpp index 1c8887170..59d9b0e80 100644 --- a/src/share/vm/interpreter/bytecodes.cpp +++ b/src/share/vm/interpreter/bytecodes.cpp @@ -1,5 +1,5 @@ /* - * Copyright (c) 1997, 2009, Oracle and/or its affiliates. All rights reserved. + * Copyright (c) 1997, 2010, Oracle and/or its affiliates. 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 @@ -37,14 +37,11 @@ bool Bytecodes::_is_initialized = false; const char* Bytecodes::_name [Bytecodes::number_of_codes]; -const char* Bytecodes::_format [Bytecodes::number_of_codes]; -const char* Bytecodes::_wide_format [Bytecodes::number_of_codes]; BasicType Bytecodes::_result_type [Bytecodes::number_of_codes]; s_char Bytecodes::_depth [Bytecodes::number_of_codes]; -u_char Bytecodes::_length [Bytecodes::number_of_codes]; -bool Bytecodes::_can_trap [Bytecodes::number_of_codes]; +u_char Bytecodes::_lengths [Bytecodes::number_of_codes]; Bytecodes::Code Bytecodes::_java_code [Bytecodes::number_of_codes]; -bool Bytecodes::_can_rewrite [Bytecodes::number_of_codes]; +u_short Bytecodes::_flags [(1<<BitsPerByte)*2]; Bytecodes::Code Bytecodes::code_at(methodOop method, int bci) { @@ -91,6 +88,7 @@ int Bytecodes::special_length_at(address bcp, address end) { return (len > 0 && len == (int)len) ? len : -1; } } + // Note: Length functions must return <=0 for invalid bytecodes. return 0; } @@ -124,15 +122,22 @@ void Bytecodes::def(Code code, const char* name, const char* format, const char* void Bytecodes::def(Code code, const char* name, const char* format, const char* wide_format, BasicType result_type, int depth, bool can_trap, Code java_code) { assert(wide_format == NULL || format != NULL, "short form must exist if there's a wide form"); + int len = (format != NULL ? (int) strlen(format) : 0); + int wlen = (wide_format != NULL ? (int) strlen(wide_format) : 0); _name [code] = name; - _format [code] = format; - _wide_format [code] = wide_format; _result_type [code] = result_type; _depth [code] = depth; - _can_trap [code] = can_trap; - _length [code] = format != NULL ? (u_char)strlen(format) : 0; + _lengths [code] = (wlen << 4) | (len & 0xF); _java_code [code] = java_code; - if (java_code != code) _can_rewrite[java_code] = true; + int bc_flags = 0; + if (can_trap) bc_flags |= _bc_can_trap; + if (java_code != code) bc_flags |= _bc_can_rewrite; + _flags[(u1)code+0*(1<<BitsPerByte)] = compute_flags(format, bc_flags); + _flags[(u1)code+1*(1<<BitsPerByte)] = compute_flags(wide_format, bc_flags); + assert(is_defined(code) == (format != NULL), ""); + assert(wide_is_defined(code) == (wide_format != NULL), ""); + assert(length_for(code) == len, ""); + assert(wide_length_for(code) == wlen, ""); } @@ -140,23 +145,92 @@ void Bytecodes::def(Code code, const char* name, const char* format, const char* // // b: bytecode // c: signed constant, Java byte-ordering -// i: unsigned index , Java byte-ordering -// j: unsigned index , native byte-ordering -// o: branch offset , Java byte-ordering +// i: unsigned local index, Java byte-ordering (I = native byte ordering) +// j: unsigned CP cache index, Java byte-ordering (J = native byte ordering) +// k: unsigned CP index, Java byte-ordering +// o: branch offset, Java byte-ordering // _: unused/ignored // w: wide bytecode // -// Note: Right now the format strings are used for 2 purposes: +// Note: The format strings are used for 2 purposes: // 1. to specify the length of the bytecode // (= number of characters in format string) -// 2. to specify the bytecode attributes -// -// The bytecode attributes are currently used only for bytecode tracing -// (see BytecodeTracer); thus if more specific format information is -// used, one would also have to adjust the bytecode tracer. +// 2. to derive bytecode format flags (_fmt_has_k, etc.) // // Note: For bytecodes with variable length, the format string is the empty string. +int Bytecodes::compute_flags(const char* format, int more_flags) { + if (format == NULL) return 0; // not even more_flags + int flags = more_flags; + const char* fp = format; + switch (*fp) { + case '\0': + flags |= _fmt_not_simple; // but variable + break; + case 'b': + flags |= _fmt_not_variable; // but simple + ++fp; // skip 'b' + break; + case 'w': + flags |= _fmt_not_variable | _fmt_not_simple; + ++fp; // skip 'w' + guarantee(*fp == 'b', "wide format must start with 'wb'"); + ++fp; // skip 'b' + break; + } + + int has_nbo = 0, has_jbo = 0, has_size = 0; + for (;;) { + int this_flag = 0; + char fc = *fp++; + switch (fc) { + case '\0': // end of string + assert(flags == (jchar)flags, "change _format_flags"); + return flags; + + case '_': continue; // ignore these + + case 'j': this_flag = _fmt_has_j; has_jbo = 1; break; + case 'k': this_flag = _fmt_has_k; has_jbo = 1; break; + case 'i': this_flag = _fmt_has_i; has_jbo = 1; break; + case 'c': this_flag = _fmt_has_c; has_jbo = 1; break; + case 'o': this_flag = _fmt_has_o; has_jbo = 1; break; + + // uppercase versions mark native byte order (from Rewriter) + // actually, only the 'J' case happens currently + case 'J': this_flag = _fmt_has_j; has_nbo = 1; break; + case 'K': this_flag = _fmt_has_k; has_nbo = 1; break; + case 'I': this_flag = _fmt_has_i; has_nbo = 1; break; + case 'C': this_flag = _fmt_has_c; has_nbo = 1; break; + case 'O': this_flag = _fmt_has_o; has_nbo = 1; break; + default: guarantee(false, "bad char in format"); + } + + flags |= this_flag; + + guarantee(!(has_jbo && has_nbo), "mixed byte orders in format"); + if (has_nbo) + flags |= _fmt_has_nbo; + + int this_size = 1; + if (*fp == fc) { + // advance beyond run of the same characters + this_size = 2; + while (*++fp == fc) this_size++; + switch (this_size) { + case 2: flags |= _fmt_has_u2; break; + case 4: flags |= _fmt_has_u4; break; + default: guarantee(false, "bad rep count in format"); + } + } + guarantee(has_size == 0 || // no field yet + this_size == has_size || // same size + this_size < has_size && *fp == '\0', // last field can be short + "mixed field sizes in format"); + has_size = this_size; + } +} + void Bytecodes::initialize() { if (_is_initialized) return; assert(number_of_codes <= 256, "too many bytecodes"); @@ -191,9 +265,9 @@ void Bytecodes::initialize() { def(_dconst_1 , "dconst_1" , "b" , NULL , T_DOUBLE , 2, false); def(_bipush , "bipush" , "bc" , NULL , T_INT , 1, false); def(_sipush , "sipush" , "bcc" , NULL , T_INT , 1, false); - def(_ldc , "ldc" , "bi" , NULL , T_ILLEGAL, 1, true ); - def(_ldc_w , "ldc_w" , "bii" , NULL , T_ILLEGAL, 1, true ); - def(_ldc2_w , "ldc2_w" , "bii" , NULL , T_ILLEGAL, 2, true ); + def(_ldc , "ldc" , "bk" , NULL , T_ILLEGAL, 1, true ); + def(_ldc_w , "ldc_w" , "bkk" , NULL , T_ILLEGAL, 1, true ); + def(_ldc2_w , "ldc2_w" , "bkk" , NULL , T_ILLEGAL, 2, true ); def(_iload , "iload" , "bi" , "wbii" , T_INT , 1, false); def(_lload , "lload" , "bi" , "wbii" , T_LONG , 2, false); def(_fload , "fload" , "bi" , "wbii" , T_FLOAT , 1, false); @@ -351,26 +425,26 @@ void Bytecodes::initialize() { def(_dreturn , "dreturn" , "b" , NULL , T_DOUBLE , -2, true); def(_areturn , "areturn" , "b" , NULL , T_OBJECT , -1, true); def(_return , "return" , "b" , NULL , T_VOID , 0, true); - def(_getstatic , "getstatic" , "bjj" , NULL , T_ILLEGAL, 1, true ); - def(_putstatic , "putstatic" , "bjj" , NULL , T_ILLEGAL, -1, true ); - def(_getfield , "getfield" , "bjj" , NULL , T_ILLEGAL, 0, true ); - def(_putfield , "putfield" , "bjj" , NULL , T_ILLEGAL, -2, true ); - def(_invokevirtual , "invokevirtual" , "bjj" , NULL , T_ILLEGAL, -1, true); - def(_invokespecial , "invokespecial" , "bjj" , NULL , T_ILLEGAL, -1, true); - def(_invokestatic , "invokestatic" , "bjj" , NULL , T_ILLEGAL, 0, true); - def(_invokeinterface , "invokeinterface" , "bjj__", NULL , T_ILLEGAL, -1, true); - def(_invokedynamic , "invokedynamic" , "bjjjj", NULL , T_ILLEGAL, 0, true ); - def(_new , "new" , "bii" , NULL , T_OBJECT , 1, true ); + def(_getstatic , "getstatic" , "bJJ" , NULL , T_ILLEGAL, 1, true ); + def(_putstatic , "putstatic" , "bJJ" , NULL , T_ILLEGAL, -1, true ); + def(_getfield , "getfield" , "bJJ" , NULL , T_ILLEGAL, 0, true ); + def(_putfield , "putfield" , "bJJ" , NULL , T_ILLEGAL, -2, true ); + def(_invokevirtual , "invokevirtual" , "bJJ" , NULL , T_ILLEGAL, -1, true); + def(_invokespecial , "invokespecial" , "bJJ" , NULL , T_ILLEGAL, -1, true); + def(_invokestatic , "invokestatic" , "bJJ" , NULL , T_ILLEGAL, 0, true); + def(_invokeinterface , "invokeinterface" , "bJJ__", NULL , T_ILLEGAL, -1, true); + def(_invokedynamic , "invokedynamic" , "bJJJJ", NULL , T_ILLEGAL, 0, true ); + def(_new , "new" , "bkk" , NULL , T_OBJECT , 1, true ); def(_newarray , "newarray" , "bc" , NULL , T_OBJECT , 0, true ); - def(_anewarray , "anewarray" , "bii" , NULL , T_OBJECT , 0, true ); + def(_anewarray , "anewarray" , "bkk" , NULL , T_OBJECT , 0, true ); def(_arraylength , "arraylength" , "b" , NULL , T_VOID , 0, true ); def(_athrow , "athrow" , "b" , NULL , T_VOID , -1, true ); - def(_checkcast , "checkcast" , "bii" , NULL , T_OBJECT , 0, true ); - def(_instanceof , "instanceof" , "bii" , NULL , T_INT , 0, true ); + def(_checkcast , "checkcast" , "bkk" , NULL , T_OBJECT , 0, true ); + def(_instanceof , "instanceof" , "bkk" , NULL , T_INT , 0, true ); def(_monitorenter , "monitorenter" , "b" , NULL , T_VOID , -1, true ); def(_monitorexit , "monitorexit" , "b" , NULL , T_VOID , -1, true ); def(_wide , "wide" , "" , NULL , T_VOID , 0, false); - def(_multianewarray , "multianewarray" , "biic" , NULL , T_OBJECT , 1, true ); + def(_multianewarray , "multianewarray" , "bkkc" , NULL , T_OBJECT , 1, true ); def(_ifnull , "ifnull" , "boo" , NULL , T_VOID , -1, false); def(_ifnonnull , "ifnonnull" , "boo" , NULL , T_VOID , -1, false); def(_goto_w , "goto_w" , "boooo", NULL , T_VOID , 0, false); @@ -380,35 +454,35 @@ void Bytecodes::initialize() { // JVM bytecodes // bytecode bytecode name format wide f. result tp stk traps std code - def(_fast_agetfield , "fast_agetfield" , "bjj" , NULL , T_OBJECT , 0, true , _getfield ); - def(_fast_bgetfield , "fast_bgetfield" , "bjj" , NULL , T_INT , 0, true , _getfield ); - def(_fast_cgetfield , "fast_cgetfield" , "bjj" , NULL , T_CHAR , 0, true , _getfield ); - def(_fast_dgetfield , "fast_dgetfield" , "bjj" , NULL , T_DOUBLE , 0, true , _getfield ); - def(_fast_fgetfield , "fast_fgetfield" , "bjj" , NULL , T_FLOAT , 0, true , _getfield ); - def(_fast_igetfield , "fast_igetfield" , "bjj" , NULL , T_INT , 0, true , _getfield ); - def(_fast_lgetfield , "fast_lgetfield" , "bjj" , NULL , T_LONG , 0, true , _getfield ); - def(_fast_sgetfield , "fast_sgetfield" , "bjj" , NULL , T_SHORT , 0, true , _getfield ); - - def(_fast_aputfield , "fast_aputfield" , "bjj" , NULL , T_OBJECT , 0, true , _putfield ); - def(_fast_bputfield , "fast_bputfield" , "bjj" , NULL , T_INT , 0, true , _putfield ); - def(_fast_cputfield , "fast_cputfield" , "bjj" , NULL , T_CHAR , 0, true , _putfield ); - def(_fast_dputfield , "fast_dputfield" , "bjj" , NULL , T_DOUBLE , 0, true , _putfield ); - def(_fast_fputfield , "fast_fputfield" , "bjj" , NULL , T_FLOAT , 0, true , _putfield ); - def(_fast_iputfield , "fast_iputfield" , "bjj" , NULL , T_INT , 0, true , _putfield ); - def(_fast_lputfield , "fast_lputfield" , "bjj" , NULL , T_LONG , 0, true , _putfield ); - def(_fast_sputfield , "fast_sputfield" , "bjj" , NULL , T_SHORT , 0, true , _putfield ); + def(_fast_agetfield , "fast_agetfield" , "bJJ" , NULL , T_OBJECT , 0, true , _getfield ); + def(_fast_bgetfield , "fast_bgetfield" , "bJJ" , NULL , T_INT , 0, true , _getfield ); + def(_fast_cgetfield , "fast_cgetfield" , "bJJ" , NULL , T_CHAR , 0, true , _getfield ); + def(_fast_dgetfield , "fast_dgetfield" , "bJJ" , NULL , T_DOUBLE , 0, true , _getfield ); + def(_fast_fgetfield , "fast_fgetfield" , "bJJ" , NULL , T_FLOAT , 0, true , _getfield ); + def(_fast_igetfield , "fast_igetfield" , "bJJ" , NULL , T_INT , 0, true , _getfield ); + def(_fast_lgetfield , "fast_lgetfield" , "bJJ" , NULL , T_LONG , 0, true , _getfield ); + def(_fast_sgetfield , "fast_sgetfield" , "bJJ" , NULL , T_SHORT , 0, true , _getfield ); + + def(_fast_aputfield , "fast_aputfield" , "bJJ" , NULL , T_OBJECT , 0, true , _putfield ); + def(_fast_bputfield , "fast_bputfield" , "bJJ" , NULL , T_INT , 0, true , _putfield ); + def(_fast_cputfield , "fast_cputfield" , "bJJ" , NULL , T_CHAR , 0, true , _putfield ); + def(_fast_dputfield , "fast_dputfield" , "bJJ" , NULL , T_DOUBLE , 0, true , _putfield ); + def(_fast_fputfield , "fast_fputfield" , "bJJ" , NULL , T_FLOAT , 0, true , _putfield ); + def(_fast_iputfield , "fast_iputfield" , "bJJ" , NULL , T_INT , 0, true , _putfield ); + def(_fast_lputfield , "fast_lputfield" , "bJJ" , NULL , T_LONG , 0, true , _putfield ); + def(_fast_sputfield , "fast_sputfield" , "bJJ" , NULL , T_SHORT , 0, true , _putfield ); def(_fast_aload_0 , "fast_aload_0" , "b" , NULL , T_OBJECT , 1, true , _aload_0 ); - def(_fast_iaccess_0 , "fast_iaccess_0" , "b_jj" , NULL , T_INT , 1, true , _aload_0 ); - def(_fast_aaccess_0 , "fast_aaccess_0" , "b_jj" , NULL , T_OBJECT , 1, true , _aload_0 ); - def(_fast_faccess_0 , "fast_faccess_0" , "b_jj" , NULL , T_OBJECT , 1, true , _aload_0 ); + def(_fast_iaccess_0 , "fast_iaccess_0" , "b_JJ" , NULL , T_INT , 1, true , _aload_0 ); + def(_fast_aaccess_0 , "fast_aaccess_0" , "b_JJ" , NULL , T_OBJECT , 1, true , _aload_0 ); + def(_fast_faccess_0 , "fast_faccess_0" , "b_JJ" , NULL , T_OBJECT , 1, true , _aload_0 ); def(_fast_iload , "fast_iload" , "bi" , NULL , T_INT , 1, false, _iload); def(_fast_iload2 , "fast_iload2" , "bi_i" , NULL , T_INT , 2, false, _iload); def(_fast_icaload , "fast_icaload" , "bi_" , NULL , T_INT , 0, false, _iload); // Faster method invocation. - def(_fast_invokevfinal , "fast_invokevfinal" , "bjj" , NULL , T_ILLEGAL, -1, true, _invokevirtual ); + def(_fast_invokevfinal , "fast_invokevfinal" , "bJJ" , NULL , T_ILLEGAL, -1, true, _invokevirtual ); def(_fast_linearswitch , "fast_linearswitch" , "" , NULL , T_VOID , -1, false, _lookupswitch ); def(_fast_binaryswitch , "fast_binaryswitch" , "" , NULL , T_VOID , -1, false, _lookupswitch ); |