/js/lib/Socket.IO-node/support/expresso/deps/jscoverage/js/jsopcode.h
http://github.com/onedayitwillmake/RealtimeMultiplayerNodeJs · C++ Header · 404 lines · 220 code · 51 blank · 133 comment · 1 complexity · 14b7bd836bf6873003a73a62c2cf0d55 MD5 · raw file
- /* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
- *
- * ***** BEGIN LICENSE BLOCK *****
- * Version: MPL 1.1/GPL 2.0/LGPL 2.1
- *
- * The contents of this file are subject to the Mozilla Public License Version
- * 1.1 (the "License"); you may not use this file except in compliance with
- * the License. You may obtain a copy of the License at
- * http://www.mozilla.org/MPL/
- *
- * Software distributed under the License is distributed on an "AS IS" basis,
- * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
- * for the specific language governing rights and limitations under the
- * License.
- *
- * The Original Code is Mozilla Communicator client code, released
- * March 31, 1998.
- *
- * The Initial Developer of the Original Code is
- * Netscape Communications Corporation.
- * Portions created by the Initial Developer are Copyright (C) 1998
- * the Initial Developer. All Rights Reserved.
- *
- * Contributor(s):
- *
- * Alternatively, the contents of this file may be used under the terms of
- * either of the GNU General Public License Version 2 or later (the "GPL"),
- * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
- * in which case the provisions of the GPL or the LGPL are applicable instead
- * of those above. If you wish to allow use of your version of this file only
- * under the terms of either the GPL or the LGPL, and not to allow others to
- * use your version of this file under the terms of the MPL, indicate your
- * decision by deleting the provisions above and replace them with the notice
- * and other provisions required by the GPL or the LGPL. If you do not delete
- * the provisions above, a recipient may use your version of this file under
- * the terms of any one of the MPL, the GPL or the LGPL.
- *
- * ***** END LICENSE BLOCK ***** */
- #ifndef jsopcode_h___
- #define jsopcode_h___
- /*
- * JS bytecode definitions.
- */
- #include <stddef.h>
- #include "jsprvtd.h"
- #include "jspubtd.h"
- #include "jsutil.h"
- JS_BEGIN_EXTERN_C
- /*
- * JS operation bytecodes.
- */
- typedef enum JSOp {
- #define OPDEF(op,val,name,token,length,nuses,ndefs,prec,format) \
- op = val,
- #include "jsopcode.tbl"
- #undef OPDEF
- JSOP_LIMIT
- } JSOp;
- /*
- * JS bytecode formats.
- */
- #define JOF_BYTE 0 /* single bytecode, no immediates */
- #define JOF_JUMP 1 /* signed 16-bit jump offset immediate */
- #define JOF_ATOM 2 /* unsigned 16-bit constant pool index */
- #define JOF_UINT16 3 /* unsigned 16-bit immediate operand */
- #define JOF_TABLESWITCH 4 /* table switch */
- #define JOF_LOOKUPSWITCH 5 /* lookup switch */
- #define JOF_QARG 6 /* quickened get/set function argument ops */
- #define JOF_LOCAL 7 /* var or block-local variable */
- #define JOF_SLOTATOM 8 /* uint16 slot index + constant pool index */
- #define JOF_JUMPX 9 /* signed 32-bit jump offset immediate */
- #define JOF_TABLESWITCHX 10 /* extended (32-bit offset) table switch */
- #define JOF_LOOKUPSWITCHX 11 /* extended (32-bit offset) lookup switch */
- #define JOF_UINT24 12 /* extended unsigned 24-bit literal (index) */
- #define JOF_UINT8 13 /* uint8 immediate, e.g. top 8 bits of 24-bit
- atom index */
- #define JOF_INT32 14 /* int32 immediate operand */
- #define JOF_OBJECT 15 /* unsigned 16-bit object pool index */
- #define JOF_SLOTOBJECT 16 /* uint16 slot index + object pool index */
- #define JOF_REGEXP 17 /* unsigned 16-bit regexp pool index */
- #define JOF_INT8 18 /* int8 immediate operand */
- #define JOF_TYPEMASK 0x001f /* mask for above immediate types */
- #define JOF_NAME (1U<<5) /* name operation */
- #define JOF_PROP (2U<<5) /* obj.prop operation */
- #define JOF_ELEM (3U<<5) /* obj[index] operation */
- #define JOF_XMLNAME (4U<<5) /* XML name: *, a::b, @a, @a::b, etc. */
- #define JOF_VARPROP (5U<<5) /* x.prop for this, arg, var, or local x */
- #define JOF_MODEMASK (7U<<5) /* mask for above addressing modes */
- #define JOF_SET (1U<<8) /* set (i.e., assignment) operation */
- #define JOF_DEL (1U<<9) /* delete operation */
- #define JOF_DEC (1U<<10) /* decrement (--, not ++) opcode */
- #define JOF_INC (2U<<10) /* increment (++, not --) opcode */
- #define JOF_INCDEC (3U<<10) /* increment or decrement opcode */
- #define JOF_POST (1U<<12) /* postorder increment or decrement */
- #define JOF_FOR (1U<<13) /* for-in property op (akin to JOF_SET) */
- #define JOF_ASSIGNING JOF_SET /* hint for JSClass.resolve, used for ops
- that do simplex assignment */
- #define JOF_DETECTING (1U<<14) /* object detection for JSNewResolveOp */
- #define JOF_BACKPATCH (1U<<15) /* backpatch placeholder during codegen */
- #define JOF_LEFTASSOC (1U<<16) /* left-associative operator */
- #define JOF_DECLARING (1U<<17) /* var, const, or function declaration op */
- #define JOF_INDEXBASE (1U<<18) /* atom segment base setting prefix op */
- #define JOF_CALLOP (1U<<19) /* call operation that pushes function and
- this */
- #define JOF_PARENHEAD (1U<<20) /* opcode consumes value of expression in
- parenthesized statement head */
- #define JOF_INVOKE (1U<<21) /* JSOP_CALL, JSOP_NEW, JSOP_EVAL */
- #define JOF_TMPSLOT (1U<<22) /* interpreter uses extra temporary slot
- to root intermediate objects besides
- the slots opcode uses */
- #define JOF_TMPSLOT2 (2U<<22) /* interpreter uses extra 2 temporary slot
- besides the slots opcode uses */
- #define JOF_TMPSLOT_SHIFT 22
- #define JOF_TMPSLOT_MASK (JS_BITMASK(2) << JOF_TMPSLOT_SHIFT)
- /* Shorthands for type from format and type from opcode. */
- #define JOF_TYPE(fmt) ((fmt) & JOF_TYPEMASK)
- #define JOF_OPTYPE(op) JOF_TYPE(js_CodeSpec[op].format)
- /* Shorthands for mode from format and mode from opcode. */
- #define JOF_MODE(fmt) ((fmt) & JOF_MODEMASK)
- #define JOF_OPMODE(op) JOF_MODE(js_CodeSpec[op].format)
- #define JOF_TYPE_IS_EXTENDED_JUMP(t) \
- ((unsigned)((t) - JOF_JUMPX) <= (unsigned)(JOF_LOOKUPSWITCHX - JOF_JUMPX))
- /*
- * Immediate operand getters, setters, and bounds.
- */
- /* Common uint16 immediate format helpers. */
- #define UINT16_LEN 2
- #define UINT16_HI(i) ((jsbytecode)((i) >> 8))
- #define UINT16_LO(i) ((jsbytecode)(i))
- #define GET_UINT16(pc) ((uintN)(((pc)[1] << 8) | (pc)[2]))
- #define SET_UINT16(pc,i) ((pc)[1] = UINT16_HI(i), (pc)[2] = UINT16_LO(i))
- #define UINT16_LIMIT ((uintN)1 << 16)
- /* Short (2-byte signed offset) relative jump macros. */
- #define JUMP_OFFSET_LEN 2
- #define JUMP_OFFSET_HI(off) ((jsbytecode)((off) >> 8))
- #define JUMP_OFFSET_LO(off) ((jsbytecode)(off))
- #define GET_JUMP_OFFSET(pc) ((int16)GET_UINT16(pc))
- #define SET_JUMP_OFFSET(pc,off) ((pc)[1] = JUMP_OFFSET_HI(off), \
- (pc)[2] = JUMP_OFFSET_LO(off))
- #define JUMP_OFFSET_MIN ((int16)0x8000)
- #define JUMP_OFFSET_MAX ((int16)0x7fff)
- /*
- * When a short jump won't hold a relative offset, its 2-byte immediate offset
- * operand is an unsigned index of a span-dependency record, maintained until
- * code generation finishes -- after which some (but we hope not nearly all)
- * span-dependent jumps must be extended (see OptimizeSpanDeps in jsemit.c).
- *
- * If the span-dependency record index overflows SPANDEP_INDEX_MAX, the jump
- * offset will contain SPANDEP_INDEX_HUGE, indicating that the record must be
- * found (via binary search) by its "before span-dependency optimization" pc
- * offset (from script main entry point).
- */
- #define GET_SPANDEP_INDEX(pc) ((uint16)GET_UINT16(pc))
- #define SET_SPANDEP_INDEX(pc,i) ((pc)[1] = JUMP_OFFSET_HI(i), \
- (pc)[2] = JUMP_OFFSET_LO(i))
- #define SPANDEP_INDEX_MAX ((uint16)0xfffe)
- #define SPANDEP_INDEX_HUGE ((uint16)0xffff)
- /* Ultimately, if short jumps won't do, emit long (4-byte signed) offsets. */
- #define JUMPX_OFFSET_LEN 4
- #define JUMPX_OFFSET_B3(off) ((jsbytecode)((off) >> 24))
- #define JUMPX_OFFSET_B2(off) ((jsbytecode)((off) >> 16))
- #define JUMPX_OFFSET_B1(off) ((jsbytecode)((off) >> 8))
- #define JUMPX_OFFSET_B0(off) ((jsbytecode)(off))
- #define GET_JUMPX_OFFSET(pc) ((int32)(((pc)[1] << 24) | ((pc)[2] << 16) \
- | ((pc)[3] << 8) | (pc)[4]))
- #define SET_JUMPX_OFFSET(pc,off)((pc)[1] = JUMPX_OFFSET_B3(off), \
- (pc)[2] = JUMPX_OFFSET_B2(off), \
- (pc)[3] = JUMPX_OFFSET_B1(off), \
- (pc)[4] = JUMPX_OFFSET_B0(off))
- #define JUMPX_OFFSET_MIN ((int32)0x80000000)
- #define JUMPX_OFFSET_MAX ((int32)0x7fffffff)
- /*
- * A literal is indexed by a per-script atom or object maps. Most scripts
- * have relatively few literals, so the standard JOF_ATOM, JOF_OBJECT and
- * JOF_REGEXP formats specifies a fixed 16 bits of immediate operand index.
- * A script with more than 64K literals must wrap the bytecode into
- * JSOP_INDEXBASE and JSOP_RESETBASE pair.
- */
- #define INDEX_LEN 2
- #define INDEX_HI(i) ((jsbytecode)((i) >> 8))
- #define INDEX_LO(i) ((jsbytecode)(i))
- #define GET_INDEX(pc) GET_UINT16(pc)
- #define SET_INDEX(pc,i) ((pc)[1] = INDEX_HI(i), (pc)[2] = INDEX_LO(i))
- #define GET_INDEXBASE(pc) (JS_ASSERT(*(pc) == JSOP_INDEXBASE), \
- ((uintN)((pc)[1])) << 16)
- #define INDEXBASE_LEN 1
- #define UINT24_HI(i) ((jsbytecode)((i) >> 16))
- #define UINT24_MID(i) ((jsbytecode)((i) >> 8))
- #define UINT24_LO(i) ((jsbytecode)(i))
- #define GET_UINT24(pc) ((jsatomid)(((pc)[1] << 16) | \
- ((pc)[2] << 8) | \
- (pc)[3]))
- #define SET_UINT24(pc,i) ((pc)[1] = UINT24_HI(i), \
- (pc)[2] = UINT24_MID(i), \
- (pc)[3] = UINT24_LO(i))
- #define GET_INT8(pc) ((jsint)(int8)(pc)[1])
- #define GET_INT32(pc) ((jsint)(((uint32)((pc)[1]) << 24) | \
- ((uint32)((pc)[2]) << 16) | \
- ((uint32)((pc)[3]) << 8) | \
- (uint32)(pc)[4]))
- #define SET_INT32(pc,i) ((pc)[1] = (jsbytecode)((uint32)(i) >> 24), \
- (pc)[2] = (jsbytecode)((uint32)(i) >> 16), \
- (pc)[3] = (jsbytecode)((uint32)(i) >> 8), \
- (pc)[4] = (jsbytecode)(uint32)(i))
- /* Index limit is determined by SN_3BYTE_OFFSET_FLAG, see jsemit.h. */
- #define INDEX_LIMIT_LOG2 23
- #define INDEX_LIMIT ((uint32)1 << INDEX_LIMIT_LOG2)
- JS_STATIC_ASSERT(sizeof(uint32) * JS_BITS_PER_BYTE >= INDEX_LIMIT_LOG2 + 1);
- /* Actual argument count operand format helpers. */
- #define ARGC_HI(argc) UINT16_HI(argc)
- #define ARGC_LO(argc) UINT16_LO(argc)
- #define GET_ARGC(pc) GET_UINT16(pc)
- #define ARGC_LIMIT UINT16_LIMIT
- /* Synonyms for quick JOF_QARG and JOF_LOCAL bytecodes. */
- #define GET_ARGNO(pc) GET_UINT16(pc)
- #define SET_ARGNO(pc,argno) SET_UINT16(pc,argno)
- #define ARGNO_LEN 2
- #define ARGNO_LIMIT UINT16_LIMIT
- #define GET_SLOTNO(pc) GET_UINT16(pc)
- #define SET_SLOTNO(pc,varno) SET_UINT16(pc,varno)
- #define SLOTNO_LEN 2
- #define SLOTNO_LIMIT UINT16_LIMIT
- struct JSCodeSpec {
- int8 length; /* length including opcode byte */
- int8 nuses; /* arity, -1 if variadic */
- int8 ndefs; /* number of stack results */
- uint8 prec; /* operator precedence */
- uint32 format; /* immediate operand format */
- };
- extern const JSCodeSpec js_CodeSpec[];
- extern uintN js_NumCodeSpecs;
- extern const char *js_CodeName[];
- extern const char js_EscapeMap[];
- /*
- * Return a GC'ed string containing the chars in str, with any non-printing
- * chars or quotes (' or " as specified by the quote argument) escaped, and
- * with the quote character at the beginning and end of the result string.
- */
- extern JSString *
- js_QuoteString(JSContext *cx, JSString *str, jschar quote);
- /*
- * JSPrinter operations, for printf style message formatting. The return
- * value from js_GetPrinterOutput() is the printer's cumulative output, in
- * a GC'ed string.
- */
- #ifdef JS_ARENAMETER
- # define JS_NEW_PRINTER(cx, name, fun, indent, pretty) \
- js_NewPrinter(cx, name, fun, indent, pretty)
- #else
- # define JS_NEW_PRINTER(cx, name, fun, indent, pretty) \
- js_NewPrinter(cx, fun, indent, pretty)
- #endif
- extern JSPrinter *
- JS_NEW_PRINTER(JSContext *cx, const char *name, JSFunction *fun,
- uintN indent, JSBool pretty);
- extern void
- js_DestroyPrinter(JSPrinter *jp);
- extern JSString *
- js_GetPrinterOutput(JSPrinter *jp);
- extern int
- js_printf(JSPrinter *jp, const char *format, ...);
- extern JSBool
- js_puts(JSPrinter *jp, const char *s);
- /*
- * Get index operand from the bytecode using a bytecode analysis to deduce the
- * the index register. This function is infallible, in spite of taking cx as
- * its first parameter; it uses only cx->runtime when calling JS_GetTrapOpcode.
- * The GET_*_FROM_BYTECODE macros that call it pick up cx from their caller's
- * lexical environments.
- */
- uintN
- js_GetIndexFromBytecode(JSContext *cx, JSScript *script, jsbytecode *pc,
- ptrdiff_t pcoff);
- /*
- * A slower version of GET_ATOM when the caller does not want to maintain
- * the index segment register itself.
- */
- #define GET_ATOM_FROM_BYTECODE(script, pc, pcoff, atom) \
- JS_BEGIN_MACRO \
- uintN index_ = js_GetIndexFromBytecode(cx, (script), (pc), (pcoff)); \
- JS_GET_SCRIPT_ATOM((script), index_, atom); \
- JS_END_MACRO
- #define GET_OBJECT_FROM_BYTECODE(script, pc, pcoff, obj) \
- JS_BEGIN_MACRO \
- uintN index_ = js_GetIndexFromBytecode(cx, (script), (pc), (pcoff)); \
- JS_GET_SCRIPT_OBJECT((script), index_, obj); \
- JS_END_MACRO
- #define GET_FUNCTION_FROM_BYTECODE(script, pc, pcoff, fun) \
- JS_BEGIN_MACRO \
- uintN index_ = js_GetIndexFromBytecode(cx, (script), (pc), (pcoff)); \
- JS_GET_SCRIPT_FUNCTION((script), index_, fun); \
- JS_END_MACRO
- #define GET_REGEXP_FROM_BYTECODE(script, pc, pcoff, obj) \
- JS_BEGIN_MACRO \
- uintN index_ = js_GetIndexFromBytecode(cx, (script), (pc), (pcoff)); \
- JS_GET_SCRIPT_REGEXP((script), index_, obj); \
- JS_END_MACRO
- /*
- * Get the length of variable-length bytecode like JSOP_TABLESWITCH.
- */
- extern uintN
- js_GetVariableBytecodeLength(jsbytecode *pc);
- /*
- * Find the number of stack slots used by a variadic opcode such as JSOP_CALL
- * or JSOP_NEWARRAY (for such ops, JSCodeSpec.nuses is -1).
- */
- extern uintN
- js_GetVariableStackUseLength(JSOp op, jsbytecode *pc);
- #ifdef DEBUG
- /*
- * Disassemblers, for debugging only.
- */
- #include <stdio.h>
- extern JS_FRIEND_API(JSBool)
- js_Disassemble(JSContext *cx, JSScript *script, JSBool lines, FILE *fp);
- extern JS_FRIEND_API(uintN)
- js_Disassemble1(JSContext *cx, JSScript *script, jsbytecode *pc, uintN loc,
- JSBool lines, FILE *fp);
- #endif /* DEBUG */
- /*
- * Decompilers, for script, function, and expression pretty-printing.
- */
- extern JSBool
- js_DecompileScript(JSPrinter *jp, JSScript *script);
- extern JSBool
- js_DecompileFunctionBody(JSPrinter *jp);
- extern JSBool
- js_DecompileFunction(JSPrinter *jp);
- /*
- * Find the source expression that resulted in v, and return a newly allocated
- * C-string containing it. Fall back on v's string conversion (fallback) if we
- * can't find the bytecode that generated and pushed v on the operand stack.
- *
- * Search the current stack frame if spindex is JSDVG_SEARCH_STACK. Don't
- * look for v on the stack if spindex is JSDVG_IGNORE_STACK. Otherwise,
- * spindex is the negative index of v, measured from cx->fp->sp, or from a
- * lower frame's sp if cx->fp is native.
- *
- * The caller must call JS_free on the result after a succsesful call.
- */
- extern char *
- js_DecompileValueGenerator(JSContext *cx, intN spindex, jsval v,
- JSString *fallback);
- #define JSDVG_IGNORE_STACK 0
- #define JSDVG_SEARCH_STACK 1
- /*
- * Given bytecode address pc in script's main program code, return the operand
- * stack depth just before (JSOp) *pc executes.
- */
- extern uintN
- js_ReconstructStackDepth(JSContext *cx, JSScript *script, jsbytecode *pc);
- JS_END_EXTERN_C
- #endif /* jsopcode_h___ */