diff options
Diffstat (limited to 'generic/tclCompile.c')
| -rw-r--r-- | generic/tclCompile.c | 1935 |
1 files changed, 1515 insertions, 420 deletions
diff --git a/generic/tclCompile.c b/generic/tclCompile.c index f982359..633966e 100644 --- a/generic/tclCompile.c +++ b/generic/tclCompile.c @@ -14,6 +14,7 @@ #include "tclInt.h" #include "tclCompile.h" +#include <assert.h> /* * Table of all AuxData types. @@ -37,7 +38,7 @@ TCL_DECLARE_MUTEX(tableMutex) int tclTraceCompile = 0; static int traceInitialized = 0; #endif - + /* * A table describing the Tcl bytecode instructions. Entries in this table * must correspond to the instruction opcode definitions in tclCompile.h. The @@ -50,7 +51,7 @@ static int traceInitialized = 0; * existence of a procedure call frame to distinguish these. */ -InstructionDesc tclInstructionTable[] = { +InstructionDesc const tclInstructionTable[] = { /* Name Bytes stackEffect #Opnds Operand types */ {"done", 1, -1, 0, {OPERAND_NONE}}, /* Finish ByteCode execution and return stktop (top stack item) */ @@ -154,11 +155,11 @@ InstructionDesc tclInstructionTable[] = { {"lt", 1, -1, 0, {OPERAND_NONE}}, /* Less: push (stknext < stktop) */ {"gt", 1, -1, 0, {OPERAND_NONE}}, - /* Greater: push (stknext || stktop) */ + /* Greater: push (stknext > stktop) */ {"le", 1, -1, 0, {OPERAND_NONE}}, - /* Less or equal: push (stknext || stktop) */ + /* Less or equal: push (stknext <= stktop) */ {"ge", 1, -1, 0, {OPERAND_NONE}}, - /* Greater or equal: push (stknext || stktop) */ + /* Greater or equal: push (stknext >= stktop) */ {"lshift", 1, -1, 0, {OPERAND_NONE}}, /* Left shift: push (stknext << stktop) */ {"rshift", 1, -1, 0, {OPERAND_NONE}}, @@ -309,7 +310,7 @@ InstructionDesc tclInstructionTable[] = { {"pushReturnOpts", 1, +1, 0, {OPERAND_NONE}}, /* Push the interpreter's return option dictionary as an object on the * stack. */ - {"returnStk", 1, -2, 0, {OPERAND_NONE}}, + {"returnStk", 1, -1, 0, {OPERAND_NONE}}, /* Compiled [return]; options and result are on the stack, code and * level are in the options. */ @@ -341,21 +342,23 @@ InstructionDesc tclInstructionTable[] = { * Stack: ... key valueToAppend => ... newDict */ {"dictFirst", 5, +2, 1, {OPERAND_LVT4}}, /* Begin iterating over the dictionary, using the local scalar - * indicated by op4 to hold the iterator state. If doneBool is true, - * dictDone *must* be called later on. + * indicated by op4 to hold the iterator state. The local scalar + * should not refer to a named variable as the value is not wholly + * managed correctly. * Stack: ... dict => ... value key doneBool */ {"dictNext", 5, +3, 1, {OPERAND_LVT4}}, /* Get the next iteration from the iterator in op4's local scalar. * Stack: ... => ... value key doneBool */ {"dictDone", 5, 0, 1, {OPERAND_LVT4}}, - /* Terminate the iterator in op4's local scalar. */ + /* Terminate the iterator in op4's local scalar. Use unsetScalar + * instead (with 0 for flags). */ {"dictUpdateStart", 9, 0, 2, {OPERAND_LVT4, OPERAND_AUX4}}, /* Create the variables (described in the aux data referred to by the * second immediate argument) to mirror the state of the dictionary in * the variable referred to by the first immediate argument. The list - * of keys (popped from the stack) must be the same length as the list - * of variables. - * Stack: ... keyList => ... */ + * of keys (top of the stack, not poppsed) must be the same length as + * the list of variables. + * Stack: ... keyList => ... keyList */ {"dictUpdateEnd", 9, -1, 2, {OPERAND_LVT4, OPERAND_AUX4}}, /* Reflect the state of local variables (described in the aux data * referred to by the second immediate argument) back to the state of @@ -363,24 +366,25 @@ InstructionDesc tclInstructionTable[] = { * argument. The list of keys (popped from the stack) must be the same * length as the list of variables. * Stack: ... keyList => ... */ - {"jumpTable", 5, -1, 1, {OPERAND_AUX4}}, + {"jumpTable", 5, -1, 1, {OPERAND_AUX4}}, /* Jump according to the jump-table (in AuxData as indicated by the * operand) and the argument popped from the list. Always executes the * next instruction if no match against the table's entries was found. * Stack: ... value => ... * Note that the jump table contains offsets relative to the PC when * it points to this instruction; the code is relocatable. */ - {"upvar", 5, 0, 1, {OPERAND_LVT4}}, - /* finds level and otherName in stack, links to local variable at - * index op1. Leaves the level on stack. */ - {"nsupvar", 5, 0, 1, {OPERAND_LVT4}}, - /* finds namespace and otherName in stack, links to local variable at - * index op1. Leaves the namespace on stack. */ - {"variable", 5, 0, 1, {OPERAND_LVT4}}, - /* finds namespace and otherName in stack, links to local variable at - * index op1. Leaves the namespace on stack. */ - {"syntax", 9, -1, 2, {OPERAND_INT4, OPERAND_UINT4}}, - /* Compiled bytecodes to signal syntax error. */ + {"upvar", 5, -1, 1, {OPERAND_LVT4}}, + /* finds level and otherName in stack, links to local variable at + * index op1. Leaves the level on stack. */ + {"nsupvar", 5, -1, 1, {OPERAND_LVT4}}, + /* finds namespace and otherName in stack, links to local variable at + * index op1. Leaves the namespace on stack. */ + {"variable", 5, -1, 1, {OPERAND_LVT4}}, + /* finds namespace and otherName in stack, links to local variable at + * index op1. Leaves the namespace on stack. */ + {"syntax", 9, -1, 2, {OPERAND_INT4, OPERAND_UINT4}}, + /* Compiled bytecodes to signal syntax error. Equivalent to returnImm + * except for the ERR_ALREADY_LOGGED flag in the interpreter. */ {"reverse", 5, 0, 1, {OPERAND_UINT4}}, /* Reverse the order of the arg elements at the top of stack */ @@ -397,13 +401,159 @@ InstructionDesc tclInstructionTable[] = { * stknext */ {"existStk", 1, 0, 0, {OPERAND_NONE}}, /* Test if general variable exists; unparsed variable name is stktop*/ - {0, 0, 0, 0, {0}} -}; + {"nop", 1, 0, 0, {OPERAND_NONE}}, + /* Do nothing */ + {"returnCodeBranch", 1, -1, 0, {OPERAND_NONE}}, + /* Jump to next instruction based on the return code on top of stack + * ERROR: +1; RETURN: +3; BREAK: +5; CONTINUE: +7; + * Other non-OK: +9 + */ + + {"unsetScalar", 6, 0, 2, {OPERAND_UINT1, OPERAND_LVT4}}, + /* Make scalar variable at index op2 in call frame cease to exist; + * op1 is 1 for errors on problems, 0 otherwise */ + {"unsetArray", 6, -1, 2, {OPERAND_UINT1, OPERAND_LVT4}}, + /* Make array element cease to exist; array at slot op2, element is + * stktop; op1 is 1 for errors on problems, 0 otherwise */ + {"unsetArrayStk", 2, -2, 1, {OPERAND_UINT1}}, + /* Make array element cease to exist; element is stktop, array name is + * stknext; op1 is 1 for errors on problems, 0 otherwise */ + {"unsetStk", 2, -1, 1, {OPERAND_UINT1}}, + /* Make general variable cease to exist; unparsed variable name is + * stktop; op1 is 1 for errors on problems, 0 otherwise */ + + {"dictExpand", 1, -1, 0, {OPERAND_NONE}}, + /* Probe into a dict and extract it (or a subdict of it) into + * variables with matched names. Produces list of keys bound as + * result. Part of [dict with]. + * Stack: ... dict path => ... keyList */ + {"dictRecombineStk", 1, -3, 0, {OPERAND_NONE}}, + /* Map variable contents back into a dictionary in a variable. Part of + * [dict with]. + * Stack: ... dictVarName path keyList => ... */ + {"dictRecombineImm", 5, -2, 1, {OPERAND_LVT4}}, + /* Map variable contents back into a dictionary in the local variable + * indicated by the LVT index. Part of [dict with]. + * Stack: ... path keyList => ... */ + {"dictExists", 5, INT_MIN, 1, {OPERAND_UINT4}}, + /* The top op4 words (min 1) are a key path into the dictionary just + * below the keys on the stack, and all those values are replaced by a + * boolean indicating whether it is possible to read out a value from + * that key-path (like [dict exists]). + * Stack: ... dict key1 ... keyN => ... boolean */ + {"verifyDict", 1, -1, 0, {OPERAND_NONE}}, + /* Verifies that the word on the top of the stack is a dictionary, + * popping it if it is and throwing an error if it is not. + * Stack: ... value => ... */ + + {"strmap", 1, -2, 0, {OPERAND_NONE}}, + /* Simplified version of [string map] that only applies one change + * string, and only case-sensitively. + * Stack: ... from to string => ... changedString */ + {"strfind", 1, -1, 0, {OPERAND_NONE}}, + /* Find the first index of a needle string in a haystack string, + * producing the index (integer) or -1 if nothing found. + * Stack: ... needle haystack => ... index */ + {"strrfind", 1, -1, 0, {OPERAND_NONE}}, + /* Find the last index of a needle string in a haystack string, + * producing the index (integer) or -1 if nothing found. + * Stack: ... needle haystack => ... index */ + {"strrangeImm", 9, 0, 2, {OPERAND_IDX4, OPERAND_IDX4}}, + /* String Range: push (string range stktop op4 op4) */ + {"strrange", 1, -2, 0, {OPERAND_NONE}}, + /* String Range with non-constant arguments. + * Stack: ... string idxA idxB => ... substring */ + + {"yield", 1, 0, 0, {OPERAND_NONE}}, + /* Makes the current coroutine yield the value at the top of the + * stack, and places the response back on top of the stack when it + * resumes. + * Stack: ... valueToYield => ... resumeValue */ + {"coroName", 1, +1, 0, {OPERAND_NONE}}, + /* Push the name of the interpreter's current coroutine as an object + * on the stack. */ + {"tailcall", 2, INT_MIN, 1, {OPERAND_UINT1}}, + /* Do a tailcall with the opnd items on the stack as the thing to + * tailcall to; opnd must be greater than 0 for the semantics to work + * right. */ + + {"currentNamespace", 1, +1, 0, {OPERAND_NONE}}, + /* Push the name of the interpreter's current namespace as an object + * on the stack. */ + {"infoLevelNumber", 1, +1, 0, {OPERAND_NONE}}, + /* Push the stack depth (i.e., [info level]) of the interpreter as an + * object on the stack. */ + {"infoLevelArgs", 1, 0, 0, {OPERAND_NONE}}, + /* Push the argument words to a stack depth (i.e., [info level <n>]) + * of the interpreter as an object on the stack. + * Stack: ... depth => ... argList */ + {"resolveCmd", 1, 0, 0, {OPERAND_NONE}}, + /* Resolves the command named on the top of the stack to its fully + * qualified version, or produces the empty string if no such command + * exists. Never generates errors. + * Stack: ... cmdName => ... fullCmdName */ + {"tclooSelf", 1, +1, 0, {OPERAND_NONE}}, + /* Push the identity of the current TclOO object (i.e., the name of + * its current public access command) on the stack. */ + {"tclooClass", 1, 0, 0, {OPERAND_NONE}}, + /* Push the class of the TclOO object named at the top of the stack + * onto the stack. + * Stack: ... object => ... class */ + {"tclooNamespace", 1, 0, 0, {OPERAND_NONE}}, + /* Push the namespace of the TclOO object named at the top of the + * stack onto the stack. + * Stack: ... object => ... namespace */ + {"tclooIsObject", 1, 0, 0, {OPERAND_NONE}}, + /* Push whether the value named at the top of the stack is a TclOO + * object (i.e., a boolean). Can corrupt the interpreter result + * despite not throwing, so not safe for use in a post-exception + * context. + * Stack: ... value => ... boolean */ + + {"arrayExistsStk", 1, 0, 0, {OPERAND_NONE}}, + /* Looks up the element on the top of the stack and tests whether it + * is an array. Pushes a boolean describing whether this is the + * case. Also runs the whole-array trace on the named variable, so can + * throw anything. + * Stack: ... varName => ... boolean */ + {"arrayExistsImm", 5, +1, 1, {OPERAND_UINT4}}, + /* Looks up the variable indexed by opnd and tests whether it is an + * array. Pushes a boolean describing whether this is the case. Also + * runs the whole-array trace on the named variable, so can throw + * anything. + * Stack: ... => ... boolean */ + {"arrayMakeStk", 1, -1, 0, {OPERAND_NONE}}, + /* Forces the element on the top of the stack to be the name of an + * array. + * Stack: ... varName => ... */ + {"arrayMakeImm", 5, 0, 1, {OPERAND_UINT4}}, + /* Forces the variable indexed by opnd to be an array. Does not touch + * the stack. */ + + {"invokeReplace", 6, INT_MIN, 2, {OPERAND_UINT4,OPERAND_UINT1}}, + /* Invoke command named objv[0], replacing the first two words with + * the word at the top of the stack; + * <objc,objv> = <op4,top op4 after popping 1> */ + + {"listConcat", 1, -1, 0, {OPERAND_NONE}}, + /* Concatenates the two lists at the top of the stack into a single + * list and pushes that resulting list onto the stack. + * Stack: ... list1 list2 => ... [lconcat list1 list2] */ + + {"expandDrop", 1, 0, 0, {OPERAND_NONE}}, + /* Drops an element from the auxiliary stack, popping stack elements + * until the matching stack depth is reached. */ + + {NULL, 0, 0, 0, {OPERAND_NONE}} +}; + /* * Prototypes for procedures defined later in this file: */ +static ByteCode * CompileSubstObj(Tcl_Interp *interp, Tcl_Obj *objPtr, + int flags); static void DupByteCodeInternalRep(Tcl_Obj *srcPtr, Tcl_Obj *copyPtr); static unsigned char * EncodeCmdLocMap(CompileEnv *envPtr, @@ -412,26 +562,34 @@ static void EnterCmdExtentData(CompileEnv *envPtr, int cmdNumber, int numSrcBytes, int numCodeBytes); static void EnterCmdStartData(CompileEnv *envPtr, int cmdNumber, int srcOffset, int codeOffset); +static Command * FindCompiledCommandFromToken(Tcl_Interp *interp, + Tcl_Token *tokenPtr); static void FreeByteCodeInternalRep(Tcl_Obj *objPtr); +static void FreeSubstCodeInternalRep(Tcl_Obj *objPtr); static int GetCmdLocEncodingSize(CompileEnv *envPtr); +static int IsCompactibleCompileEnv(Tcl_Interp *interp, + CompileEnv *envPtr); #ifdef TCL_COMPILE_STATS static void RecordByteCodeStats(ByteCode *codePtr); #endif /* TCL_COMPILE_STATS */ -static void RegisterAuxDataType(AuxDataType *typePtr); +static void RegisterAuxDataType(const AuxDataType *typePtr); static int SetByteCodeFromAny(Tcl_Interp *interp, Tcl_Obj *objPtr); +static void StartExpanding(CompileEnv *envPtr); static int FormatInstruction(ByteCode *codePtr, - unsigned char *pc, Tcl_Obj *bufferObj); + const unsigned char *pc, Tcl_Obj *bufferObj); static void PrintSourceToObj(Tcl_Obj *appendObj, const char *stringPtr, int maxChars); +static void UpdateStringOfInstName(Tcl_Obj *objPtr); + /* * TIP #280: Helper for building the per-word line information of all compiled * commands. */ static void EnterCmdWordData(ExtCmdLoc *eclPtr, int srcOffset, Tcl_Token *tokenPtr, const char *cmd, int len, - int numWords, int line, int* clNext, int **lines, - CompileEnv* envPtr); + int numWords, int line, int *clNext, int **lines, + CompileEnv *envPtr); static void ReleaseCmdWordData(ExtCmdLoc *eclPtr); /* @@ -439,13 +597,46 @@ static void ReleaseCmdWordData(ExtCmdLoc *eclPtr); * procedures that can be invoked by generic object code. */ -Tcl_ObjType tclByteCodeType = { +const Tcl_ObjType tclByteCodeType = { "bytecode", /* name */ FreeByteCodeInternalRep, /* freeIntRepProc */ DupByteCodeInternalRep, /* dupIntRepProc */ NULL, /* updateStringProc */ SetByteCodeFromAny /* setFromAnyProc */ }; + +/* + * The structure below defines a bytecode Tcl object type to hold the + * compiled bytecode for the [subst]itution of Tcl values. + */ + +static const Tcl_ObjType substCodeType = { + "substcode", /* name */ + FreeSubstCodeInternalRep, /* freeIntRepProc */ + DupByteCodeInternalRep, /* dupIntRepProc - shared with bytecode */ + NULL, /* updateStringProc */ + NULL, /* setFromAnyProc */ +}; + +/* + * The structure below defines an instruction name Tcl object to allow + * reporting of inner contexts in errorstack without string allocation. + */ + +static const Tcl_ObjType tclInstNameType = { + "instname", /* name */ + NULL, /* freeIntRepProc */ + NULL, /* dupIntRepProc */ + UpdateStringOfInstName, /* updateStringProc */ + NULL, /* setFromAnyProc */ +}; + +/* + * Helper macros. + */ + +#define TclIncrUInt4AtPtr(ptr, delta) \ + TclStoreInt4AtPtr(TclGetUInt4AtPtr(ptr)+(delta), (ptr)); /* *---------------------------------------------------------------------- @@ -486,7 +677,8 @@ TclSetByteCodeFromAny( * in frame. */ int length, result = TCL_OK; const char *stringPtr; - ContLineLoc* clLocPtr; + Proc *procPtr = iPtr->compiledProcPtr; + ContLineLoc *clLocPtr; #ifdef TCL_COMPILE_DEBUG if (!traceInitialized) { @@ -508,6 +700,7 @@ TclSetByteCodeFromAny( TclInitCompileEnv(interp, &compEnv, stringPtr, length, iPtr->invokeCmdFramePtr, iPtr->invokeWord); + /* * Now we check if we have data about invisible continuation lines for the * script, and make it available to the compile environment, if so. @@ -515,16 +708,16 @@ TclSetByteCodeFromAny( * It is not clear if the script Tcl_Obj* can be free'd while the compiler * is using it, leading to the release of the associated ContLineLoc * structure as well. To ensure that the latter doesn't happen we set a - * lock on it. We release this lock in the function TclFreeCompileEnv (), + * lock on it. We release this lock in the function TclFreeCompileEnv(), * found in this file. The "lineCLPtr" hashtable is managed in the file * "tclObj.c". */ - clLocPtr = TclContinuationsGet (objPtr); + clLocPtr = TclContinuationsGet(objPtr); if (clLocPtr) { - compEnv.clLoc = clLocPtr; + compEnv.clLoc = clLocPtr; compEnv.clNext = &compEnv.clLoc->loc[0]; - Tcl_Preserve (compEnv.clLoc); + Tcl_Preserve(compEnv.clLoc); } TclCompileScript(interp, stringPtr, length, &compEnv); @@ -536,11 +729,45 @@ TclSetByteCodeFromAny( TclEmitOpcode(INST_DONE, &compEnv); /* + * Check for optimizations! + * + * Test if the generated code is free of most hazards; if so, recompile + * but with generation of INST_START_CMD disabled. This produces somewhat + * faster code in some cases, and more compact code in more. + */ + + if (Tcl_GetMaster(interp) == NULL && + !Tcl_LimitTypeEnabled(interp, TCL_LIMIT_COMMANDS|TCL_LIMIT_TIME) + && IsCompactibleCompileEnv(interp, &compEnv)) { + TclFreeCompileEnv(&compEnv); + iPtr->compiledProcPtr = procPtr; + TclInitCompileEnv(interp, &compEnv, stringPtr, length, + iPtr->invokeCmdFramePtr, iPtr->invokeWord); + if (clLocPtr) { + compEnv.clLoc = clLocPtr; + compEnv.clNext = &compEnv.clLoc->loc[0]; + Tcl_Preserve(compEnv.clLoc); + } + compEnv.atCmdStart = 2; /* The disabling magic. */ + TclCompileScript(interp, stringPtr, length, &compEnv); + assert (compEnv.atCmdStart > 1); + TclEmitOpcode(INST_DONE, &compEnv); + assert (compEnv.atCmdStart > 1); + } + + /* + * Apply some peephole optimizations that can cross specific/generic + * instruction generator boundaries. + */ + + TclOptimizeBytecode(&compEnv); + + /* * Invoke the compilation hook procedure if one exists. */ if (hookProc) { - result = (*hookProc)(interp, &compEnv, clientData); + result = hookProc(interp, &compEnv, clientData); } /* @@ -598,8 +825,7 @@ SetByteCodeFromAny( if (interp == NULL) { return TCL_ERROR; } - (void) TclSetByteCodeFromAny(interp, objPtr, NULL, (ClientData) NULL); - return TCL_OK; + return TclSetByteCodeFromAny(interp, objPtr, NULL, NULL); } /* @@ -653,14 +879,13 @@ static void FreeByteCodeInternalRep( register Tcl_Obj *objPtr) /* Object whose internal rep to free. */ { - register ByteCode *codePtr = (ByteCode *) - objPtr->internalRep.twoPtrValue.ptr1; + register ByteCode *codePtr = objPtr->internalRep.twoPtrValue.ptr1; + objPtr->typePtr = NULL; codePtr->refCount--; if (codePtr->refCount <= 0) { TclCleanupByteCode(codePtr); } - objPtr->typePtr = NULL; } /* @@ -691,7 +916,7 @@ TclCleanupByteCode( int numLitObjects = codePtr->numLitObjects; int numAuxDataItems = codePtr->numAuxDataItems; register Tcl_Obj **objArrayPtr, *objPtr; - register AuxData *auxDataPtr; + register const AuxData *auxDataPtr; int i; #ifdef TCL_COMPILE_STATS @@ -700,7 +925,7 @@ TclCleanupByteCode( Tcl_Time destroyTime; int lifetimeSec, lifetimeMicroSec, log2; - statsPtr = &((Interp *) interp)->stats; + statsPtr = &iPtr->stats; statsPtr->numByteCodesFreed++; statsPtr->currentSrcBytes -= (double) codePtr->numSrcBytes; @@ -752,7 +977,7 @@ TclCleanupByteCode( * released. */ - if ((codePtr->flags & TCL_BYTECODE_PRECOMPILED) || (interp == NULL)) { + if (codePtr->flags & TCL_BYTECODE_PRECOMPILED) { objArrayPtr = codePtr->objArrayPtr; for (i = 0; i < numLitObjects; i++) { @@ -765,24 +990,16 @@ TclCleanupByteCode( codePtr->numLitObjects = 0; } else { objArrayPtr = codePtr->objArrayPtr; - for (i = 0; i < numLitObjects; i++) { - /* - * TclReleaseLiteral sets a ByteCode's object array entry NULL to - * indicate that it has already freed the literal. - */ - - objPtr = *objArrayPtr; - if (objPtr != NULL) { - TclReleaseLiteral(interp, objPtr); - } - objArrayPtr++; + while (numLitObjects--) { + /* TclReleaseLiteral calls Tcl_DecrRefCount() for us */ + TclReleaseLiteral(interp, *objArrayPtr++); } } auxDataPtr = codePtr->auxDataArrayPtr; for (i = 0; i < numAuxDataItems; i++) { if (auxDataPtr->type->freeProc != NULL) { - (auxDataPtr->type->freeProc)(auxDataPtr->clientData); + auxDataPtr->type->freeProc(auxDataPtr->clientData); } auxDataPtr++; } @@ -798,6 +1015,7 @@ TclCleanupByteCode( if (iPtr) { Tcl_HashEntry *hePtr = Tcl_FindHashEntry(iPtr->lineBCPtr, (char *) codePtr); + if (hePtr) { ReleaseCmdWordData(Tcl_GetHashValue(hePtr)); Tcl_DeleteHashEntry(hePtr); @@ -809,7 +1027,252 @@ TclCleanupByteCode( } TclHandleRelease(codePtr->interpHandle); - ckfree((char *) codePtr); + ckfree(codePtr); +} + +/* + * --------------------------------------------------------------------- + * + * IsCompactibleCompileEnv -- + * + * Checks to see if we may apply some basic compaction optimizations to a + * piece of bytecode. Idempotent. + * + * --------------------------------------------------------------------- + */ + +static int +IsCompactibleCompileEnv( + Tcl_Interp *interp, + CompileEnv *envPtr) +{ + unsigned char *pc; + int size; + + /* + * Special: procedures in the '::tcl' namespace (or its children) are + * considered to be well-behaved and so can have compaction applied even + * if it would otherwise be invalid. + */ + + if (envPtr->procPtr != NULL && envPtr->procPtr->cmdPtr != NULL + && envPtr->procPtr->cmdPtr->nsPtr != NULL) { + Namespace *nsPtr = envPtr->procPtr->cmdPtr->nsPtr; + + if (strcmp(nsPtr->fullName, "::tcl") == 0 + || strncmp(nsPtr->fullName, "::tcl::", 7) == 0) { + return 1; + } + } + + /* + * Go through and ensure that no operation involved can cause a desired + * change of bytecode sequence during running. This comes down to ensuring + * that there are no mapped variables (due to traces) or calls to external + * commands (traces, [uplevel] trickery). This is actually a very + * conservative check; it turns down a lot of code that is OK in practice. + */ + + for (pc = envPtr->codeStart ; pc < envPtr->codeNext ; pc += size) { + switch (*pc) { + /* Invokes */ + case INST_INVOKE_STK1: + case INST_INVOKE_STK4: + case INST_INVOKE_EXPANDED: + case INST_INVOKE_REPLACE: + return 0; + /* Runtime evals */ + case INST_EVAL_STK: + case INST_EXPR_STK: + case INST_YIELD: + return 0; + /* Upvars */ + case INST_UPVAR: + case INST_NSUPVAR: + case INST_VARIABLE: + return 0; + default: + size = tclInstructionTable[*pc].numBytes; + assert (size > 0); + break; + } + } + + return 1; +} + +/* + *---------------------------------------------------------------------- + * + * Tcl_SubstObj -- + * + * This function performs the substitutions specified on the given string + * as described in the user documentation for the "subst" Tcl command. + * + * Results: + * A Tcl_Obj* containing the substituted string, or NULL to indicate that + * an error occurred. + * + * Side effects: + * See the user documentation. + * + *---------------------------------------------------------------------- + */ + +Tcl_Obj * +Tcl_SubstObj( + Tcl_Interp *interp, /* Interpreter in which substitution occurs */ + Tcl_Obj *objPtr, /* The value to be substituted. */ + int flags) /* What substitutions to do. */ +{ + NRE_callback *rootPtr = TOP_CB(interp); + + if (TclNRRunCallbacks(interp, Tcl_NRSubstObj(interp, objPtr, flags), + rootPtr) != TCL_OK) { + return NULL; + } + return Tcl_GetObjResult(interp); +} + +/* + *---------------------------------------------------------------------- + * + * Tcl_NRSubstObj -- + * + * Request substitution of a Tcl value by the NR stack. + * + * Results: + * Returns TCL_OK. + * + * Side effects: + * Compiles objPtr into bytecode that performs the substitutions as + * governed by flags and places callbacks on the NR stack to execute + * the bytecode and store the result in the interp. + * + *---------------------------------------------------------------------- + */ + +int +Tcl_NRSubstObj( + Tcl_Interp *interp, + Tcl_Obj *objPtr, + int flags) +{ + ByteCode *codePtr = CompileSubstObj(interp, objPtr, flags); + + /* TODO: Confirm we do not need this. */ + /* Tcl_ResetResult(interp); */ + return TclNRExecuteByteCode(interp, codePtr); +} + +/* + *---------------------------------------------------------------------- + * + * CompileSubstObj -- + * + * Compile a Tcl value into ByteCode implementing its substitution, as + * governed by flags. + * + * Results: + * A (ByteCode *) is returned pointing to the resulting ByteCode. + * The caller must manage its refCount and arrange for a call to + * TclCleanupByteCode() when the last reference disappears. + * + * Side effects: + * The Tcl_ObjType of objPtr is changed to the "substcode" type, and the + * ByteCode and governing flags value are kept in the internal rep for + * faster operations the next time CompileSubstObj is called on the same + * value. + * + *---------------------------------------------------------------------- + */ + +static ByteCode * +CompileSubstObj( + Tcl_Interp *interp, + Tcl_Obj *objPtr, + int flags) +{ + Interp *iPtr = (Interp *) interp; + ByteCode *codePtr = NULL; + + if (objPtr->typePtr == &substCodeType) { + Namespace *nsPtr = iPtr->varFramePtr->nsPtr; + + codePtr = objPtr->internalRep.ptrAndLongRep.ptr; + if ((unsigned long)flags != objPtr->internalRep.ptrAndLongRep.value + || ((Interp *) *codePtr->interpHandle != iPtr) + || (codePtr->compileEpoch != iPtr->compileEpoch) + || (codePtr->nsPtr != nsPtr) + || (codePtr->nsEpoch != nsPtr->resolverEpoch) + || (codePtr->localCachePtr != + iPtr->varFramePtr->localCachePtr)) { + FreeSubstCodeInternalRep(objPtr); + } + } + if (objPtr->typePtr != &substCodeType) { + CompileEnv compEnv; + int numBytes; + const char *bytes = Tcl_GetStringFromObj(objPtr, &numBytes); + + /* TODO: Check for more TIP 280 */ + TclInitCompileEnv(interp, &compEnv, bytes, numBytes, NULL, 0); + + TclSubstCompile(interp, bytes, numBytes, flags, 1, &compEnv); + + TclEmitOpcode(INST_DONE, &compEnv); + TclInitByteCodeObj(objPtr, &compEnv); + objPtr->typePtr = &substCodeType; + TclFreeCompileEnv(&compEnv); + + codePtr = objPtr->internalRep.twoPtrValue.ptr1; + objPtr->internalRep.ptrAndLongRep.ptr = codePtr; + objPtr->internalRep.ptrAndLongRep.value = flags; + if (iPtr->varFramePtr->localCachePtr) { + codePtr->localCachePtr = iPtr->varFramePtr->localCachePtr; + codePtr->localCachePtr->refCount++; + } +#ifdef TCL_COMPILE_DEBUG + if (tclTraceCompile >= 2) { + TclPrintByteCodeObj(interp, objPtr); + fflush(stdout); + } +#endif /* TCL_COMPILE_DEBUG */ + } + return codePtr; +} + +/* + *---------------------------------------------------------------------- + * + * FreeSubstCodeInternalRep -- + * + * Part of the substcode Tcl object type implementation. Frees the + * storage associated with a substcode object's internal representation + * unless its code is actively being executed. + * + * Results: + * None. + * + * Side effects: + * The substcode object's internal rep is marked invalid and its code + * gets freed unless the code is actively being executed. In that case + * the cleanup is delayed until the last execution of the code completes. + * + *---------------------------------------------------------------------- + */ + +static void +FreeSubstCodeInternalRep( + register Tcl_Obj *objPtr) /* Object whose internal rep to free. */ +{ + register ByteCode *codePtr = objPtr->internalRep.ptrAndLongRep.ptr; + + objPtr->typePtr = NULL; + codePtr->refCount--; + if (codePtr->refCount <= 0) { + TclCleanupByteCode(codePtr); + } } static void @@ -865,6 +1328,8 @@ TclInitCompileEnv( { Interp *iPtr = (Interp *) interp; + assert(tclInstructionTable[LAST_INST_OPCODE+1].name == NULL); + envPtr->iPtr = iPtr; envPtr->source = stringPtr; envPtr->numSrcBytes = numBytes; @@ -875,11 +1340,11 @@ TclInitCompileEnv( envPtr->maxExceptDepth = 0; envPtr->maxStackDepth = 0; envPtr->currStackDepth = 0; - TclInitLiteralTable(&(envPtr->localLitTable)); + TclInitLiteralTable(&envPtr->localLitTable); envPtr->codeStart = envPtr->staticCodeSpace; envPtr->codeNext = envPtr->codeStart; - envPtr->codeEnd = (envPtr->codeStart + COMPILEENV_INIT_CODE_BYTES); + envPtr->codeEnd = envPtr->codeStart + COMPILEENV_INIT_CODE_BYTES; envPtr->mallocedCodeArray = 0; envPtr->literalArrayPtr = envPtr->staticLiteralSpace; @@ -888,6 +1353,7 @@ TclInitCompileEnv( envPtr->mallocedLiteralArray = 0; envPtr->exceptArrayPtr = envPtr->staticExceptArraySpace; + envPtr->exceptAuxArrayPtr = envPtr->staticExAuxArraySpace; envPtr->exceptArrayNext = 0; envPtr->exceptArrayEnd = COMPILEENV_INIT_EXCEPT_RANGES; envPtr->mallocedExceptArray = 0; @@ -896,6 +1362,7 @@ TclInitCompileEnv( envPtr->cmdMapEnd = COMPILEENV_INIT_CMD_MAP_SIZE; envPtr->mallocedCmdMap = 0; envPtr->atCmdStart = 1; + envPtr->expandCount = 0; /* * TIP #280: Set up the extended command location information, based on @@ -906,40 +1373,71 @@ TclInitCompileEnv( * non-compiling evaluator */ - envPtr->extCmdMapPtr = (ExtCmdLoc *) ckalloc(sizeof(ExtCmdLoc)); + envPtr->extCmdMapPtr = ckalloc(sizeof(ExtCmdLoc)); envPtr->extCmdMapPtr->loc = NULL; envPtr->extCmdMapPtr->nloc = 0; envPtr->extCmdMapPtr->nuloc = 0; envPtr->extCmdMapPtr->path = NULL; Tcl_InitHashTable(&envPtr->extCmdMapPtr->litInfo, TCL_ONE_WORD_KEYS); - if (invoker == NULL || - (invoker->type == TCL_LOCATION_EVAL_LIST)) { - /* + if ((invoker == NULL) || (invoker->type == TCL_LOCATION_EVAL_LIST)) { + /* * Initialize the compiler for relative counting in case of a * dynamic context. */ envPtr->line = 1; - envPtr->extCmdMapPtr->type = + if (iPtr->evalFlags & TCL_EVAL_FILE) { + iPtr->evalFlags &= ~TCL_EVAL_FILE; + envPtr->extCmdMapPtr->type = TCL_LOCATION_SOURCE; + + if (iPtr->scriptFile) { + /* + * Normalization here, to have the correct pwd. Should have + * negligible impact on performance, as the norm should have + * been done already by the 'source' invoking us, and it + * caches the result. + */ + + Tcl_Obj *norm = + Tcl_FSGetNormalizedPath(interp, iPtr->scriptFile); + + if (norm == NULL) { + /* + * Error message in the interp result. No place to put it. + * And no place to serve the error itself to either. Fake + * a path, empty string. + */ + + TclNewLiteralStringObj(envPtr->extCmdMapPtr->path, ""); + } else { + envPtr->extCmdMapPtr->path = norm; + } + } else { + TclNewLiteralStringObj(envPtr->extCmdMapPtr->path, ""); + } + + Tcl_IncrRefCount(envPtr->extCmdMapPtr->path); + } else { + envPtr->extCmdMapPtr->type = (envPtr->procPtr ? TCL_LOCATION_PROC : TCL_LOCATION_BC); + } } else { - /* + /* * Initialize the compiler using the context, making counting absolute * to that context. Note that the context can be byte code execution. * In that case we have to fill out the missing pieces (line, path, * ...) which may make change the type as well. */ - CmdFrame* ctxPtr = (CmdFrame *) TclStackAlloc(interp, sizeof(CmdFrame)); + CmdFrame *ctxPtr = TclStackAlloc(interp, sizeof(CmdFrame)); int pc = 0; *ctxPtr = *invoker; - if (invoker->type == TCL_LOCATION_BC) { /* * Note: Type BC => ctx.data.eval.path is not used. - * ctx.data.tebc.codePtr is used instead. + * ctx.data.tebc.codePtr is used instead. */ TclGetSrcInfoForPc(ctxPtr); @@ -959,6 +1457,7 @@ TclInitCompileEnv( /* * The reference made by 'TclGetSrcInfoForPc' is dead. */ + Tcl_DecrRefCount(ctxPtr->data.eval.path); } } else { @@ -979,7 +1478,7 @@ TclInitCompileEnv( * We have a new reference here. */ - Tcl_IncrRefCount(ctxPtr->data.eval.path); + Tcl_IncrRefCount(envPtr->extCmdMapPtr->path); } } } @@ -990,12 +1489,12 @@ TclInitCompileEnv( envPtr->extCmdMapPtr->start = envPtr->line; /* - * Initialize the data about invisible continuation lines as empty, - * i.e. not used. The caller (TclSetByteCodeFromAny) will set this up, if - * such data is available. + * Initialize the data about invisible continuation lines as empty, i.e. + * not used. The caller (TclSetByteCodeFromAny) will set this up, if such + * data is available. */ - envPtr->clLoc = NULL; + envPtr->clLoc = NULL; envPtr->clNext = NULL; envPtr->auxDataArrayPtr = envPtr->staticAuxDataArraySpace; @@ -1030,8 +1529,8 @@ void TclFreeCompileEnv( register CompileEnv *envPtr)/* Points to the CompileEnv structure. */ { - if (envPtr->localLitTable.buckets != envPtr->localLitTable.staticBuckets) { - ckfree((char *) envPtr->localLitTable.buckets); + if (envPtr->localLitTable.buckets != envPtr->localLitTable.staticBuckets){ + ckfree(envPtr->localLitTable.buckets); envPtr->localLitTable.buckets = envPtr->localLitTable.staticBuckets; } if (envPtr->iPtr) { @@ -1061,19 +1560,20 @@ TclFreeCompileEnv( } } if (envPtr->mallocedCodeArray) { - ckfree((char *) envPtr->codeStart); + ckfree(envPtr->codeStart); } if (envPtr->mallocedLiteralArray) { - ckfree((char *) envPtr->literalArrayPtr); + ckfree(envPtr->literalArrayPtr); } if (envPtr->mallocedExceptArray) { - ckfree((char *) envPtr->exceptArrayPtr); + ckfree(envPtr->exceptArrayPtr); + ckfree(envPtr->exceptAuxArrayPtr); } if (envPtr->mallocedCmdMap) { - ckfree((char *) envPtr->cmdMapPtr); + ckfree(envPtr->cmdMapPtr); } if (envPtr->mallocedAuxDataArray) { - ckfree((char *) envPtr->auxDataArrayPtr); + ckfree(envPtr->auxDataArrayPtr); } if (envPtr->extCmdMapPtr) { ReleaseCmdWordData(envPtr->extCmdMapPtr); @@ -1087,7 +1587,7 @@ TclFreeCompileEnv( */ if (envPtr->clLoc) { - Tcl_Release (envPtr->clLoc); + Tcl_Release(envPtr->clLoc); } } @@ -1151,6 +1651,7 @@ TclWordKnownAtCompileTime( char utfBuf[TCL_UTF_MAX]; int length = TclParseBackslash(tokenPtr->start, tokenPtr->size, NULL, utfBuf); + Tcl_AppendToObj(tempPtr, utfBuf, length); } break; @@ -1171,6 +1672,54 @@ TclWordKnownAtCompileTime( } /* + * --------------------------------------------------------------------- + * + * FindCompiledCommandFromToken -- + * + * A simple helper that looks up a command's compiler from its token. + * + * --------------------------------------------------------------------- + */ + +static Command * +FindCompiledCommandFromToken( + Tcl_Interp *interp, + Tcl_Token *tokenPtr) +{ + Tcl_DString ds; + Command *cmdPtr; + + /* + * If we have a non-trivial token or are suppressing compilation, we stop + * right now. + */ + + if ((tokenPtr->type != TCL_TOKEN_SIMPLE_WORD) + || (((Interp *) interp)->flags & DONT_COMPILE_CMDS_INLINE)) { + return NULL; + } + + /* + * We copy the string before trying to find the command by name. We used + * to modify the string in place, but this is not safe because the name + * resolution handlers could have side effects that rely on the unmodified + * string. + */ + + Tcl_DStringInit(&ds); + TclDStringAppendToken(&ds, &tokenPtr[1]); + cmdPtr = (Command *) Tcl_FindCommand(interp, Tcl_DStringValue(&ds), NULL, + /*flags*/ 0); + if (cmdPtr != NULL && (cmdPtr->compileProc == NULL + || (cmdPtr->nsPtr->flags & NS_SUPPRESS_COMPILATION) + || (cmdPtr->flags & CMD_HAS_EXEC_TRACES))) { + cmdPtr = NULL; + } + Tcl_DStringFree(&ds); + return cmdPtr; +} + +/* *---------------------------------------------------------------------- * * TclCompileScript -- @@ -1199,46 +1748,32 @@ TclCompileScript( * first null character. */ CompileEnv *envPtr) /* Holds resulting instructions. */ { - Interp *iPtr = (Interp *) interp; int lastTopLevelCmdIndex = -1; - /* Index of most recent toplevel command in - * the command location table. Initialized to - * avoid compiler warning. */ + /* Index of most recent toplevel command in + * the command location table. Initialized to + * avoid compiler warning. */ int startCodeOffset = -1; /* Offset of first byte of current command's * code. Init. to avoid compiler warning. */ unsigned char *entryCodeNext = envPtr->codeNext; const char *p, *next; - Namespace *cmdNsPtr; Command *cmdPtr; Tcl_Token *tokenPtr; - int bytesLeft, isFirstCmd, wordIdx, currCmdIndex; - int commandLength, objIndex; - Tcl_DString ds; + int bytesLeft, isFirstCmd, wordIdx, currCmdIndex, commandLength, objIndex; /* TIP #280 */ ExtCmdLoc *eclPtr = envPtr->extCmdMapPtr; - int *wlines, wlineat, cmdLine; - int* clNext; - Tcl_Parse *parsePtr = (Tcl_Parse *) - TclStackAlloc(interp, sizeof(Tcl_Parse)); + int *wlines, wlineat, cmdLine, *clNext; + Tcl_Parse parse, *parsePtr = &parse; if (envPtr->iPtr == NULL) { Tcl_Panic("TclCompileScript() called on uninitialized CompileEnv"); } - Tcl_DStringInit(&ds); - if (numBytes < 0) { numBytes = strlen(script); } Tcl_ResetResult(interp); isFirstCmd = 1; - if (envPtr->procPtr != NULL) { - cmdNsPtr = envPtr->procPtr->cmdPtr->nsPtr; - } else { - cmdNsPtr = NULL; /* use current NS */ - } - /* * Each iteration through the following loop compiles the next command * from the script. @@ -1262,6 +1797,19 @@ TclCompileScript( TclCompileSyntaxError(interp, envPtr); break; } + + /* + * TIP #280: We have to count newlines before the command even in the + * degenerate case when the command has no words. (See test + * info-30.33). + * So make that counting here, and not in the (numWords > 0) branch + * below. + */ + + TclAdvanceLines(&cmdLine, p, parsePtr->commandStart); + TclAdvanceContinuations(&cmdLine, &clNext, + parsePtr->commandStart - envPtr->source); + if (parsePtr->numWords > 0) { int expand = 0; /* Set if there are dynamic expansions to * handle */ @@ -1284,7 +1832,7 @@ TclCompileScript( */ commandLength = parsePtr->commandSize; - if (parsePtr->term == parsePtr->commandStart + commandLength - 1) { + if (parsePtr->term == parsePtr->commandStart + commandLength-1) { /* * The command terminator character (such as ; or ]) is the * last character in the parsed command. Reduce the length by @@ -1315,17 +1863,33 @@ TclCompileScript( for (wordIdx = 0, tokenPtr = parsePtr->tokenPtr; wordIdx < parsePtr->numWords; - wordIdx++, tokenPtr += (tokenPtr->numComponents + 1)) { + wordIdx++, tokenPtr += tokenPtr->numComponents + 1) { if (tokenPtr->type == TCL_TOKEN_EXPAND_WORD) { expand = 1; break; } } + /* + * If expansion was requested, check if the command declares that + * it knows how to compile it. Note that if expansion is requested + * for the first word, this check will fail as the token type will + * inhibit it. (Checked inside FindCompiledCommandFromToken.) This + * is as it should be. + */ + + if (expand) { + cmdPtr = FindCompiledCommandFromToken(interp, + parsePtr->tokenPtr); + if (cmdPtr && (cmdPtr->flags & CMD_COMPILES_EXPANDED)) { + expand = 0; + } + } + envPtr->numCommands++; - currCmdIndex = (envPtr->numCommands - 1); + currCmdIndex = envPtr->numCommands - 1; lastTopLevelCmdIndex = currCmdIndex; - startCodeOffset = (envPtr->codeNext - envPtr->codeStart); + startCodeOffset = envPtr->codeNext - envPtr->codeStart; EnterCmdStartData(envPtr, currCmdIndex, parsePtr->commandStart - envPtr->source, startCodeOffset); @@ -1335,7 +1899,7 @@ TclCompileScript( */ if (expand) { - TclEmitOpcode(INST_EXPAND_START, envPtr); + StartExpanding(envPtr); } /* @@ -1346,13 +1910,10 @@ TclCompileScript( * 'wlines'. */ - TclAdvanceLines(&cmdLine, p, parsePtr->commandStart); - TclAdvanceContinuations (&cmdLine, &clNext, - parsePtr->commandStart - envPtr->source); EnterCmdWordData(eclPtr, parsePtr->commandStart - envPtr->source, - parsePtr->tokenPtr, parsePtr->commandStart, - parsePtr->commandSize, parsePtr->numWords, cmdLine, - clNext, &wlines, envPtr); + parsePtr->tokenPtr, parsePtr->commandStart, + parsePtr->commandSize, parsePtr->numWords, cmdLine, + clNext, &wlines, envPtr); wlineat = eclPtr->nuloc - 1; /* @@ -1362,19 +1923,21 @@ TclCompileScript( for (wordIdx = 0, tokenPtr = parsePtr->tokenPtr; wordIdx < parsePtr->numWords; wordIdx++, - tokenPtr += (tokenPtr->numComponents + 1)) { + tokenPtr += tokenPtr->numComponents + 1) { + /* + * Note the parse location information. + */ envPtr->line = eclPtr->loc[wlineat].line[wordIdx]; - envPtr->clNext = eclPtr->loc [wlineat].next [wordIdx]; + envPtr->clNext = eclPtr->loc[wlineat].next[wordIdx]; if (tokenPtr->type != TCL_TOKEN_SIMPLE_WORD) { /* * The word is not a simple string of characters. */ - TclCompileTokens(interp, tokenPtr+1, - tokenPtr->numComponents, envPtr); - if (tokenPtr->type == TCL_TOKEN_EXPAND_WORD) { + CompileTokens(envPtr, tokenPtr, interp); + if (expand && tokenPtr->type == TCL_TOKEN_EXPAND_WORD) { TclEmitInstInt4(INST_EXPAND_STKTOP, envPtr->currStackDepth, envPtr); } @@ -1389,36 +1952,21 @@ TclCompileScript( */ if ((wordIdx == 0) && !expand) { - /* - * We copy the string before trying to find the command by - * name. We used to modify the string in place, but this - * is not safe because the name resolution handlers could - * have side effects that rely on the unmodified string. - */ - - Tcl_DStringSetLength(&ds, 0); - Tcl_DStringAppend(&ds, tokenPtr[1].start,tokenPtr[1].size); - - cmdPtr = (Command *) Tcl_FindCommand(interp, - Tcl_DStringValue(&ds), - (Tcl_Namespace *) cmdNsPtr, /*flags*/ 0); - - if ((cmdPtr != NULL) - && (cmdPtr->compileProc != NULL) - && !(cmdPtr->flags & CMD_HAS_EXEC_TRACES) - && !(iPtr->flags & DONT_COMPILE_CMDS_INLINE)) { + cmdPtr = FindCompiledCommandFromToken(interp, tokenPtr); + if (cmdPtr) { int savedNumCmds = envPtr->numCommands; unsigned savedCodeNext = envPtr->codeNext - envPtr->codeStart; - int update = 0, code; + int update = 0; + int startStackDepth = envPtr->currStackDepth; /* * Mark the start of the command; the proper bytecode * length will be updated later. There is no need to * do this for the first bytecode in the compile env, * as the check is done before calling - * TclExecuteByteCode(). Do emit an INST_START_CMD in - * special cases where the first bytecode is in a + * TclNRExecuteByteCode(). Do emit an INST_START_CMD + * in special cases where the first bytecode is in a * loop, to insure that the corresponding command is * counted properly. Compilers for commands able to * produce such a beast (currently 'while 1' only) set @@ -1430,7 +1978,7 @@ TclCompileScript( * command. */ - if (envPtr->atCmdStart) { + if (envPtr->atCmdStart == 1) { if (savedCodeNext != 0) { /* * Increase the number of commands being @@ -1439,21 +1987,34 @@ TclCompileScript( * INST_START_CMD's operands, so be careful! */ - unsigned char *fixPtr = envPtr->codeNext - 4; - - TclStoreInt4AtPtr(TclGetUInt4AtPtr(fixPtr)+1, - fixPtr); + TclIncrUInt4AtPtr(envPtr->codeNext - 4, 1) } - } else { + } else if (envPtr->atCmdStart == 0) { TclEmitInstInt4(INST_START_CMD, 0, envPtr); TclEmitInt4(1, envPtr); update = 1; } - code = (cmdPtr->compileProc)(interp, parsePtr, - cmdPtr, envPtr); + if (cmdPtr->compileProc(interp, parsePtr, cmdPtr, + envPtr) == TCL_OK) { + /* + * Confirm that the command compiler generated a + * single value on the stack as its result. This + * is only done in debugging mode, as it *should* + * be correct and normal users have no reasonable + * way to fix it anyway. + */ + +#ifdef TCL_COMPILE_DEBUG + int diff = envPtr->currStackDepth-startStackDepth; - if (code == TCL_OK) { + if (diff != 1) { + Tcl_Panic("bad stack adjustment when compiling" + " %.*s (was %d instead of 1)", + parsePtr->tokenPtr->size, + parsePtr->tokenPtr->start, diff); + } +#endif if (update) { /* * Fix the bytecode length. @@ -1467,54 +2028,48 @@ TclCompileScript( TclStoreInt4AtPtr(fixLen, fixPtr); } goto finishCommand; - } else { - if (envPtr->atCmdStart && savedCodeNext != 0) { - /* - * Decrease the number of commands being - * started at the current point. Note that - * this depends on the exact layout of the - * INST_START_CMD's operands, so be careful! - */ - - unsigned char *fixPtr = envPtr->codeNext - 4; - - TclStoreInt4AtPtr(TclGetUInt4AtPtr(fixPtr)-1, - fixPtr); - } + } + if (envPtr->atCmdStart == 1 && savedCodeNext != 0) { /* - * Restore numCommands and codeNext to their - * correct values, removing any commands compiled - * before the failure to produce bytecode got - * reported. [Bugs 705406 and 735055] + * Decrease the number of commands being started + * at the current point. Note that this depends on + * the exact layout of the INST_START_CMD's + * operands, so be careful! */ - envPtr->numCommands = savedNumCmds; - envPtr->codeNext = envPtr->codeStart+savedCodeNext; + TclIncrUInt4AtPtr(envPtr->codeNext - 4, -1); } + + /* + * Restore numCommands and codeNext to their correct + * values, removing any commands compiled before the + * failure to produce bytecode got reported. [Bugs + * 705406 and 735055] + */ + + envPtr->numCommands = savedNumCmds; + envPtr->codeNext = envPtr->codeStart + savedCodeNext; + + /* + * And the stack depth too!! [Bug 3614102]. + */ + + envPtr->currStackDepth = startStackDepth; } /* * No compile procedure so push the word. If the command * was found, push a CmdName object to reduce runtime - * lookups. Avoid sharing this literal among different - * namespaces to reduce shimmering. + * lookups. Mark this as a command name literal to reduce + * shimmering. */ - objIndex = TclRegisterNewNSLiteral(envPtr, + objIndex = TclRegisterNewCmdLiteral(envPtr, tokenPtr[1].start, tokenPtr[1].size); - if (cmdPtr != NULL) { + if (cmdPtr) { TclSetCmdNameObj(interp, - envPtr->literalArrayPtr[objIndex].objPtr,cmdPtr); - } - if ((wordIdx == 0) && (parsePtr->numWords == 1)) { - /* - * Single word script: unshare the command name to - * avoid shimmering between bytecode and cmdName - * representations [Bug 458361] - */ - - TclHideLiteral(interp, envPtr, objIndex); + TclFetchLiteral(envPtr, objIndex), cmdPtr); } } else { /* @@ -1525,13 +2080,15 @@ TclCompileScript( * unmodified. We care only if the we are in a context * which already allows absolute counting. */ + objIndex = TclRegisterNewLiteral(envPtr, tokenPtr[1].start, tokenPtr[1].size); if (envPtr->clNext) { - TclContinuationsEnterDerived (envPtr->literalArrayPtr[objIndex].objPtr, - tokenPtr[1].start - envPtr->source, - eclPtr->loc [wlineat].next [wordIdx]); + TclContinuationsEnterDerived( + TclFetchLiteral(envPtr, objIndex), + tokenPtr[1].start - envPtr->source, + eclPtr->loc[wlineat].next[wordIdx]); } } TclEmitPush(objIndex, envPtr); @@ -1541,6 +2098,7 @@ TclCompileScript( * Emit an invoke instruction for the command. We skip this if a * compile procedure was found for the command. */ + assert(wordIdx > 0); if (expand) { /* @@ -1560,17 +2118,19 @@ TclCompileScript( */ TclEmitOpcode(INST_INVOKE_EXPANDED, envPtr); - TclAdjustStackDepth((1-wordIdx), envPtr); - } else if (wordIdx > 0) { + envPtr->expandCount--; + TclAdjustStackDepth(1 - wordIdx, envPtr); + } else { /* * Save PC -> command map for the TclArgumentBC* functions. */ int isnew; - Tcl_HashEntry* hePtr = Tcl_CreateHashEntry(&eclPtr->litInfo, - (char*) (envPtr->codeNext - envPtr->codeStart), &isnew); - Tcl_SetHashValue(hePtr, INT2PTR(wlineat)); + Tcl_HashEntry *hePtr = Tcl_CreateHashEntry(&eclPtr->litInfo, + INT2PTR(envPtr->codeNext - envPtr->codeStart), + &isnew); + Tcl_SetHashValue(hePtr, INT2PTR(wlineat)); if (wordIdx <= 255) { TclEmitInstInt1(INST_INVOKE_STK1, wordIdx, envPtr); } else { @@ -1593,8 +2153,8 @@ TclCompileScript( * reduced form now */ - ckfree((char *) eclPtr->loc[wlineat].line); - ckfree((char *) eclPtr->loc[wlineat].next); + ckfree(eclPtr->loc[wlineat].line); + ckfree(eclPtr->loc[wlineat].next); eclPtr->loc[wlineat].line = wlines; eclPtr->loc[wlineat].next = NULL; } /* end if parsePtr->numWords > 0 */ @@ -1612,27 +2172,26 @@ TclCompileScript( */ TclAdvanceLines(&cmdLine, parsePtr->commandStart, p); - TclAdvanceContinuations (&cmdLine, &clNext, p - envPtr->source); + TclAdvanceContinuations(&cmdLine, &clNext, p - envPtr->source); Tcl_FreeParse(parsePtr); } while (bytesLeft > 0); /* + * TIP #280: Bring the line counts in the CompEnv up to date. + * See tests info-30.33,34,35 . + */ + + envPtr->line = cmdLine; + envPtr->clNext = clNext; + + /* * If the source script yielded no instructions (e.g., if it was empty), * push an empty string as the command's result. - * - * WARNING: push an unshared object! If the script being compiled is a - * shared empty string, it will otherwise be self-referential and cause - * difficulties with literal management [Bugs 467523, 983660]. We used to - * have special code in TclReleaseLiteral to handle this particular - * self-reference, but now opt for avoiding its creation altogether. */ if (envPtr->codeNext == entryCodeNext) { - TclEmitPush(TclAddLiteralObj(envPtr, Tcl_NewObj(), NULL), envPtr); + PushStringLiteral(envPtr, ""); } - - TclStackFree(interp, parsePtr); - Tcl_DStringFree(&ds); } /* @@ -1657,6 +2216,76 @@ TclCompileScript( */ void +TclCompileVarSubst( + Tcl_Interp *interp, + Tcl_Token *tokenPtr, + CompileEnv *envPtr) +{ + const char *p, *name = tokenPtr[1].start; + int nameBytes = tokenPtr[1].size; + int i, localVar, localVarName = 1; + + /* + * Determine how the variable name should be handled: if it contains any + * namespace qualifiers it is not a local variable (localVarName=-1); if + * it looks like an array element and the token has a single component, it + * should not be created here [Bug 569438] (localVarName=0); otherwise, + * the local variable can safely be created (localVarName=1). + */ + + for (i = 0, p = name; i < nameBytes; i++, p++) { + if ((*p == ':') && (i < nameBytes-1) && (*(p+1) == ':')) { + localVarName = -1; + break; + } else if ((*p == '(') + && (tokenPtr->numComponents == 1) + && (*(name + nameBytes - 1) == ')')) { + localVarName = 0; + break; + } + } + + /* + * Either push the variable's name, or find its index in the array + * of local variables in a procedure frame. + */ + + localVar = -1; + if (localVarName != -1) { + localVar = TclFindCompiledLocal(name, nameBytes, localVarName, envPtr); + } + if (localVar < 0) { + PushLiteral(envPtr, name, nameBytes); + } + + /* + * Emit instructions to load the variable. + */ + + TclAdvanceLines(&envPtr->line, tokenPtr[1].start, + tokenPtr[1].start + tokenPtr[1].size); + + if (tokenPtr->numComponents == 1) { + if (localVar < 0) { + TclEmitOpcode(INST_LOAD_STK, envPtr); + } else if (localVar <= 255) { + TclEmitInstInt1(INST_LOAD_SCALAR1, localVar, envPtr); + } else { + TclEmitInstInt4(INST_LOAD_SCALAR4, localVar, envPtr); + } + } else { + TclCompileTokens(interp, tokenPtr+2, tokenPtr->numComponents-1, envPtr); + if (localVar < 0) { + TclEmitOpcode(INST_LOAD_ARRAY_STK, envPtr); + } else if (localVar <= 255) { + TclEmitInstInt1(INST_LOAD_ARRAY1, localVar, envPtr); + } else { + TclEmitInstInt4(INST_LOAD_ARRAY4, localVar, envPtr); + } + } +} + +void TclCompileTokens( Tcl_Interp *interp, /* Used for error and status reporting. */ Tcl_Token *tokenPtr, /* Pointer to first in an array of tokens to @@ -1668,44 +2297,41 @@ TclCompileTokens( Tcl_DString textBuffer; /* Holds concatenated chars from adjacent * TCL_TOKEN_TEXT, TCL_TOKEN_BS tokens. */ char buffer[TCL_UTF_MAX]; - const char *name, *p; - int numObjsToConcat, nameBytes, localVarName, localVar; - int length, i; + int i, numObjsToConcat, length; unsigned char *entryCodeNext = envPtr->codeNext; #define NUM_STATIC_POS 20 int isLiteral, maxNumCL, numCL; - int* clPosition = NULL; + int *clPosition = NULL; /* * For the handling of continuation lines in literals we first check if * this is actually a literal. For if not we can forego the additional * processing. Otherwise we pre-allocate a small table to store the - * locations of all continuation lines we find in this literal, if - * any. The table is extended if needed. + * locations of all continuation lines we find in this literal, if any. + * The table is extended if needed. * - * Note: Different to the equivalent code in function - * 'TclSubstTokens()' (see file "tclParse.c") we do not seem to need - * the 'adjust' variable. We also do not seem to need code which merges - * continuation line information of multiple words which concat'd at - * runtime. Either that or I have not managed to find a test case for - * these two possibilities yet. It might be a difference between compile- - * versus runtime processing. + * Note: Different to the equivalent code in function 'TclSubstTokens()' + * (see file "tclParse.c") we do not seem to need the 'adjust' variable. + * We also do not seem to need code which merges continuation line + * information of multiple words which concat'd at runtime. Either that or + * I have not managed to find a test case for these two possibilities yet. + * It might be a difference between compile- versus run-time processing. */ - numCL = 0; - maxNumCL = 0; + numCL = 0; + maxNumCL = 0; isLiteral = 1; for (i=0 ; i < count; i++) { - if ((tokenPtr[i].type != TCL_TOKEN_TEXT) && - (tokenPtr[i].type != TCL_TOKEN_BS)) { + if ((tokenPtr[i].type != TCL_TOKEN_TEXT) + && (tokenPtr[i].type != TCL_TOKEN_BS)) { isLiteral = 0; break; } } if (isLiteral) { - maxNumCL = NUM_STATIC_POS; - clPosition = (int*) ckalloc (maxNumCL*sizeof(int)); + maxNumCL = NUM_STATIC_POS; + clPosition = ckalloc(maxNumCL * sizeof(int)); } Tcl_DStringInit(&textBuffer); @@ -1713,7 +2339,9 @@ TclCompileTokens( for ( ; count > 0; count--, tokenPtr++) { switch (tokenPtr->type) { case TCL_TOKEN_TEXT: - Tcl_DStringAppend(&textBuffer, tokenPtr->start, tokenPtr->size); + TclDStringAppendToken(&textBuffer, tokenPtr); + TclAdvanceLines(&envPtr->line, tokenPtr->start, + tokenPtr->start + tokenPtr->size); break; case TCL_TOKEN_BS: @@ -1739,12 +2367,12 @@ TclCompileTokens( if ((length == 1) && (buffer[0] == ' ') && (tokenPtr->start[1] == '\n')) { if (isLiteral) { - int clPos = Tcl_DStringLength (&textBuffer); + int clPos = Tcl_DStringLength(&textBuffer); if (numCL >= maxNumCL) { maxNumCL *= 2; - clPosition = (int*) ckrealloc ((char*)clPosition, - maxNumCL*sizeof(int)); + clPosition = ckrealloc(clPosition, + maxNumCL * sizeof(int)); } clPosition[numCL] = clPos; numCL ++; @@ -1758,17 +2386,15 @@ TclCompileTokens( */ if (Tcl_DStringLength(&textBuffer) > 0) { - int literal = TclRegisterNewLiteral(envPtr, - Tcl_DStringValue(&textBuffer), - Tcl_DStringLength(&textBuffer)); + int literal = TclRegisterDStringLiteral(envPtr, &textBuffer); TclEmitPush(literal, envPtr); numObjsToConcat++; Tcl_DStringFree(&textBuffer); if (numCL) { - TclContinuationsEnter(envPtr->literalArrayPtr[literal].objPtr, - numCL, clPosition); + TclContinuationsEnter(TclFetchLiteral(envPtr, literal), + numCL, clPosition); } numCL = 0; } @@ -1786,79 +2412,13 @@ TclCompileTokens( if (Tcl_DStringLength(&textBuffer) > 0) { int literal; - literal = TclRegisterNewLiteral(envPtr, - Tcl_DStringValue(&textBuffer), - Tcl_DStringLength(&textBuffer)); + literal = TclRegisterDStringLiteral(envPtr, &textBuffer); TclEmitPush(literal, envPtr); numObjsToConcat++; Tcl_DStringFree(&textBuffer); } - /* - * Determine how the variable name should be handled: if it - * contains any namespace qualifiers it is not a local variable - * (localVarName=-1); if it looks like an array element and the - * token has a single component, it should not be created here - * [Bug 569438] (localVarName=0); otherwise, the local variable - * can safely be created (localVarName=1). - */ - - name = tokenPtr[1].start; - nameBytes = tokenPtr[1].size; - localVarName = -1; - if (envPtr->procPtr != NULL) { - localVarName = 1; - for (i = 0, p = name; i < nameBytes; i++, p++) { - if ((*p == ':') && (i < nameBytes-1) && (*(p+1) == ':')) { - localVarName = -1; - break; - } else if ((*p == '(') - && (tokenPtr->numComponents == 1) - && (*(name + nameBytes - 1) == ')')) { - localVarName = 0; - break; - } - } - } - - /* - * Either push the variable's name, or find its index in the array - * of local variables in a procedure frame. - */ - - localVar = -1; - if (localVarName != -1) { - localVar = TclFindCompiledLocal(name, nameBytes, localVarName, - envPtr->procPtr); - } - if (localVar < 0) { - TclEmitPush(TclRegisterNewLiteral(envPtr, name, nameBytes), - envPtr); - } - - /* - * Emit instructions to load the variable. - */ - - if (tokenPtr->numComponents == 1) { - if (localVar < 0) { - TclEmitOpcode(INST_LOAD_SCALAR_STK, envPtr); - } else if (localVar <= 255) { - TclEmitInstInt1(INST_LOAD_SCALAR1, localVar, envPtr); - } else { - TclEmitInstInt4(INST_LOAD_SCALAR4, localVar, envPtr); - } - } else { - TclCompileTokens(interp, tokenPtr+2, - tokenPtr->numComponents-1, envPtr); - if (localVar < 0) { - TclEmitOpcode(INST_LOAD_ARRAY_STK, envPtr); - } else if (localVar <= 255) { - TclEmitInstInt1(INST_LOAD_ARRAY1, localVar, envPtr); - } else { - TclEmitInstInt4(INST_LOAD_ARRAY4, localVar, envPtr); - } - } + TclCompileVarSubst(interp, tokenPtr, envPtr); numObjsToConcat++; count -= tokenPtr->numComponents; tokenPtr += tokenPtr->numComponents; @@ -1875,16 +2435,13 @@ TclCompileTokens( */ if (Tcl_DStringLength(&textBuffer) > 0) { - int literal; + int literal = TclRegisterDStringLiteral(envPtr, &textBuffer); - literal = TclRegisterNewLiteral(envPtr, Tcl_DStringValue(&textBuffer), - Tcl_DStringLength(&textBuffer)); TclEmitPush(literal, envPtr); numObjsToConcat++; - if (numCL) { - TclContinuationsEnter(envPtr->literalArrayPtr[literal].objPtr, - numCL, clPosition); + TclContinuationsEnter(TclFetchLiteral(envPtr, literal), + numCL, clPosition); } numCL = 0; } @@ -1906,17 +2463,17 @@ TclCompileTokens( */ if (envPtr->codeNext == entryCodeNext) { - TclEmitPush(TclRegisterNewLiteral(envPtr, "", 0), envPtr); + PushStringLiteral(envPtr, ""); } Tcl_DStringFree(&textBuffer); /* - * Release the temp table we used to collect the locations of - * continuation lines, if any. + * Release the temp table we used to collect the locations of continuation + * lines, if any. */ if (maxNumCL) { - ckfree ((char*) clPosition); + ckfree(clPosition); } } @@ -2010,7 +2567,7 @@ TclCompileExprWords( */ if ((numWords == 1) && (tokenPtr->type == TCL_TOKEN_SIMPLE_WORD)) { - TclCompileExpr(interp, tokenPtr[1].start, tokenPtr[1].size, envPtr, 1); + TclCompileExpr(interp, tokenPtr[1].start,tokenPtr[1].size, envPtr, 1); return; } @@ -2021,11 +2578,11 @@ TclCompileExprWords( wordPtr = tokenPtr; for (i = 0; i < numWords; i++) { - TclCompileTokens(interp, wordPtr+1, wordPtr->numComponents, envPtr); + CompileTokens(envPtr, wordPtr, interp); if (i < (numWords - 1)) { - TclEmitPush(TclRegisterNewLiteral(envPtr, " ", 1), envPtr); + PushStringLiteral(envPtr, " "); } - wordPtr += (wordPtr->numComponents + 1); + wordPtr += wordPtr->numComponents + 1; } concatItems = 2*numWords - 1; while (concatItems > 255) { @@ -2050,8 +2607,8 @@ TclCompileExprWords( * * Side effects: * Instructions are added to envPtr to execute a no-op at runtime. No - * result is pushed onto the stack: the compiler has to take care of this - * itself if the last compiled command is a NoOp. + * result is pushed onto the stack: the compiler has to take care of this + * itself if the last compiled command is a NoOp. * *---------------------------------------------------------------------- */ @@ -2067,21 +2624,17 @@ TclCompileNoOp( { Tcl_Token *tokenPtr; int i; - int savedStackDepth = envPtr->currStackDepth; tokenPtr = parsePtr->tokenPtr; - for(i = 1; i < parsePtr->numWords; i++) { + for (i = 1; i < parsePtr->numWords; i++) { tokenPtr = tokenPtr + tokenPtr->numComponents + 1; - envPtr->currStackDepth = savedStackDepth; if (tokenPtr->type != TCL_TOKEN_SIMPLE_WORD) { - TclCompileTokens(interp, tokenPtr+1, tokenPtr->numComponents, - envPtr); + CompileTokens(envPtr, tokenPtr, interp); TclEmitOpcode(INST_POP, envPtr); } } - envPtr->currStackDepth = savedStackDepth; - TclEmitPush(TclRegisterNewLiteral(envPtr, "", 0), envPtr); + PushStringLiteral(envPtr, ""); return TCL_OK; } @@ -2136,10 +2689,10 @@ TclInitByteCodeObj( iPtr = envPtr->iPtr; - codeBytes = (envPtr->codeNext - envPtr->codeStart); - objArrayBytes = (envPtr->literalArrayNext * sizeof(Tcl_Obj *)); - exceptArrayBytes = (envPtr->exceptArrayNext * sizeof(ExceptionRange)); - auxDataArrayBytes = (envPtr->auxDataArrayNext * sizeof(AuxData)); + codeBytes = envPtr->codeNext - envPtr->codeStart; + objArrayBytes = envPtr->literalArrayNext * sizeof(Tcl_Obj *); + exceptArrayBytes = envPtr->exceptArrayNext * sizeof(ExceptionRange); + auxDataArrayBytes = envPtr->auxDataArrayNext * sizeof(AuxData); cmdLocBytes = GetCmdLocEncodingSize(envPtr); /* @@ -2159,7 +2712,7 @@ TclInitByteCodeObj( namespacePtr = envPtr->iPtr->globalNsPtr; } - p = (unsigned char *) ckalloc((size_t) structureSize); + p = ckalloc(structureSize); codePtr = (ByteCode *) p; codePtr->interpHandle = TclHandlePreserve(iPtr->handle); codePtr->compileEpoch = iPtr->compileEpoch; @@ -2191,7 +2744,29 @@ TclInitByteCodeObj( p += TCL_ALIGN(codeBytes); /* align object array */ codePtr->objArrayPtr = (Tcl_Obj **) p; for (i = 0; i < numLitObjects; i++) { - codePtr->objArrayPtr[i] = envPtr->literalArrayPtr[i].objPtr; + Tcl_Obj *fetched = TclFetchLiteral(envPtr, i); + + if (objPtr == fetched) { + /* + * Prevent circular reference where the bytecode intrep of + * a value contains a literal which is that same value. + * If this is allowed to happen, refcount decrements may not + * reach zero, and memory may leak. Bugs 467523, 3357771 + * + * NOTE: [Bugs 3392070, 3389764] We make a copy based completely + * on the string value, and do not call Tcl_DuplicateObj() so we + * can be sure we do not have any lingering cycles hiding in + * the intrep. + */ + int numBytes; + const char *bytes = Tcl_GetStringFromObj(objPtr, &numBytes); + + codePtr->objArrayPtr[i] = Tcl_NewStringObj(bytes, numBytes); + Tcl_IncrRefCount(codePtr->objArrayPtr[i]); + TclReleaseLiteral((Tcl_Interp *)iPtr, objPtr); + } else { + codePtr->objArrayPtr[i] = fetched; + } } p += TCL_ALIGN(objArrayBytes); /* align exception range array */ @@ -2216,7 +2791,7 @@ TclInitByteCodeObj( #else nextPtr = EncodeCmdLocMap(envPtr, codePtr, (unsigned char *) p); if (((size_t)(nextPtr - p)) != cmdLocBytes) { - Tcl_Panic("TclInitByteCodeObj: encoded cmd location bytes %d != expected size %d", (nextPtr - p), cmdLocBytes); + Tcl_Panic("TclInitByteCodeObj: encoded cmd location bytes %lu != expected size %lu", (unsigned long)(nextPtr - p), (unsigned long)cmdLocBytes); } #endif @@ -2228,7 +2803,7 @@ TclInitByteCodeObj( #ifdef TCL_COMPILE_STATS codePtr->structureSize = structureSize - (sizeof(size_t) + sizeof(Tcl_Time)); - Tcl_GetTime(&(codePtr->createTime)); + Tcl_GetTime(&codePtr->createTime); RecordByteCodeStats(codePtr); #endif /* TCL_COMPILE_STATS */ @@ -2239,7 +2814,7 @@ TclInitByteCodeObj( */ TclFreeIntRep(objPtr); - objPtr->internalRep.twoPtrValue.ptr1 = (void *) codePtr; + objPtr->internalRep.twoPtrValue.ptr1 = codePtr; objPtr->typePtr = &tclByteCodeType; /* @@ -2247,7 +2822,7 @@ TclInitByteCodeObj( * byte code object (internal rep), for use with the bc compiler. */ - Tcl_SetHashValue(Tcl_CreateHashEntry(iPtr->lineBCPtr, (char *) codePtr, + Tcl_SetHashValue(Tcl_CreateHashEntry(iPtr->lineBCPtr, codePtr, &isNew), envPtr->extCmdMapPtr); envPtr->extCmdMapPtr = NULL; @@ -2290,18 +2865,47 @@ TclFindCompiledLocal( int nameBytes, /* Number of bytes in the name. */ int create, /* If 1, allocate a local frame entry for the * variable if it is new. */ - register Proc *procPtr) /* Points to structure describing procedure - * containing the variable reference. */ + CompileEnv *envPtr) /* Points to the current compile environment*/ { register CompiledLocal *localPtr; int localVar = -1; register int i; + Proc *procPtr; /* * If not creating a temporary, does a local variable of the specified * name already exist? */ + procPtr = envPtr->procPtr; + + if (procPtr == NULL) { + /* + * Compiling a non-body script: give it read access to the LVT in the + * current localCache + */ + + LocalCache *cachePtr = envPtr->iPtr->varFramePtr->localCachePtr; + const char *localName; + Tcl_Obj **varNamePtr; + int len; + + if (!cachePtr || !name) { + return -1; + } + + varNamePtr = &cachePtr->varName0; + for (i=0; i < cachePtr->numVars; varNamePtr++, i++) { + if (*varNamePtr) { + localName = Tcl_GetStringFromObj(*varNamePtr, &len); + if ((len == nameBytes) && !strncmp(name, localName, len)) { + return i; + } + } + } + return -1; + } + if (name != NULL) { int localCt = procPtr->numCompiledLocals; @@ -2325,9 +2929,7 @@ TclFindCompiledLocal( if (create || (name == NULL)) { localVar = procPtr->numCompiledLocals; - localPtr = (CompiledLocal *) ckalloc((unsigned) - (sizeof(CompiledLocal) - sizeof(localPtr->name) - + nameBytes + 1)); + localPtr = ckalloc(TclOffset(CompiledLocal, name) + nameBytes + 1); if (procPtr->firstLocalPtr == NULL) { procPtr->firstLocalPtr = procPtr->lastLocalPtr = localPtr; } else { @@ -2377,7 +2979,7 @@ TclExpandCodeArray( void *envArgPtr) /* Points to the CompileEnv whose code array * must be enlarged. */ { - CompileEnv *envPtr = (CompileEnv *) envArgPtr; + CompileEnv *envPtr = envArgPtr; /* The CompileEnv containing the code array to * be doubled in size. */ @@ -2387,25 +2989,26 @@ TclExpandCodeArray( * [inclusive]. */ - size_t currBytes = (envPtr->codeNext - envPtr->codeStart); - size_t newBytes = 2*(envPtr->codeEnd - envPtr->codeStart); + size_t currBytes = envPtr->codeNext - envPtr->codeStart; + size_t newBytes = 2 * (envPtr->codeEnd - envPtr->codeStart); if (envPtr->mallocedCodeArray) { - envPtr->codeStart = (unsigned char *) - ckrealloc((char *)envPtr->codeStart, newBytes); + envPtr->codeStart = ckrealloc(envPtr->codeStart, newBytes); } else { /* - * envPtr->codeStart isn't a ckalloc'd pointer, so we must - * code a ckrealloc equivalent for ourselves. + * envPtr->codeStart isn't a ckalloc'd pointer, so we must code a + * ckrealloc equivalent for ourselves. */ - unsigned char *newPtr = (unsigned char *) ckalloc((unsigned) newBytes); + + unsigned char *newPtr = ckalloc(newBytes); + memcpy(newPtr, envPtr->codeStart, currBytes); envPtr->codeStart = newPtr; envPtr->mallocedCodeArray = 1; } - envPtr->codeNext = (envPtr->codeStart + currBytes); - envPtr->codeEnd = (envPtr->codeStart + newBytes); + envPtr->codeNext = envPtr->codeStart + currBytes; + envPtr->codeEnd = envPtr->codeStart + newBytes; } /* @@ -2452,19 +3055,20 @@ EnterCmdStartData( */ size_t currElems = envPtr->cmdMapEnd; - size_t newElems = 2*currElems; + size_t newElems = 2 * currElems; size_t currBytes = currElems * sizeof(CmdLocation); size_t newBytes = newElems * sizeof(CmdLocation); if (envPtr->mallocedCmdMap) { - envPtr->cmdMapPtr = (CmdLocation *) - ckrealloc((char *) envPtr->cmdMapPtr, newBytes); + envPtr->cmdMapPtr = ckrealloc(envPtr->cmdMapPtr, newBytes); } else { /* - * envPtr->cmdMapPtr isn't a ckalloc'd pointer, so we must - * code a ckrealloc equivalent for ourselves. + * envPtr->cmdMapPtr isn't a ckalloc'd pointer, so we must code a + * ckrealloc equivalent for ourselves. */ - CmdLocation *newPtr = (CmdLocation *) ckalloc((unsigned) newBytes); + + CmdLocation *newPtr = ckalloc(newBytes); + memcpy(newPtr, envPtr->cmdMapPtr, currBytes); envPtr->cmdMapPtr = newPtr; envPtr->mallocedCmdMap = 1; @@ -2478,7 +3082,7 @@ EnterCmdStartData( } } - cmdLocPtr = &(envPtr->cmdMapPtr[cmdIndex]); + cmdLocPtr = &envPtr->cmdMapPtr[cmdIndex]; cmdLocPtr->codeOffset = codeOffset; cmdLocPtr->srcOffset = srcOffset; cmdLocPtr->numSrcBytes = -1; @@ -2527,7 +3131,7 @@ EnterCmdExtentData( cmdIndex); } - cmdLocPtr = &(envPtr->cmdMapPtr[cmdIndex]); + cmdLocPtr = &envPtr->cmdMapPtr[cmdIndex]; cmdLocPtr->numSrcBytes = numSrcBytes; cmdLocPtr->numCodeBytes = numCodeBytes; } @@ -2563,14 +3167,13 @@ EnterCmdWordData( int len, int numWords, int line, - int* clNext, + int *clNext, int **wlines, - CompileEnv* envPtr) + CompileEnv *envPtr) { ECL *ePtr; const char *last; - int wordIdx, wordLine, *wwlines; - int* wordNext; + int wordIdx, wordLine, *wwlines, *wordNext; if (eclPtr->nuloc >= eclPtr->nloc) { /* @@ -2583,25 +3186,25 @@ EnterCmdWordData( size_t newElems = (currElems ? 2*currElems : 1); size_t newBytes = newElems * sizeof(ECL); - eclPtr->loc = (ECL *) ckrealloc((char *)(eclPtr->loc), newBytes); + eclPtr->loc = ckrealloc(eclPtr->loc, newBytes); eclPtr->nloc = newElems; } ePtr = &eclPtr->loc[eclPtr->nuloc]; ePtr->srcOffset = srcOffset; - ePtr->line = (int *) ckalloc(numWords * sizeof(int)); - ePtr->next = (int**) ckalloc (numWords * sizeof (int*)); + ePtr->line = ckalloc(numWords * sizeof(int)); + ePtr->next = ckalloc(numWords * sizeof(int *)); ePtr->nline = numWords; - wwlines = (int *) ckalloc(numWords * sizeof(int)); + wwlines = ckalloc(numWords * sizeof(int)); last = cmd; wordLine = line; wordNext = clNext; for (wordIdx=0 ; wordIdx<numWords; wordIdx++, tokenPtr += tokenPtr->numComponents + 1) { - TclAdvanceLines (&wordLine, last, tokenPtr->start); - TclAdvanceContinuations (&wordLine, &wordNext, - tokenPtr->start - envPtr->source); + TclAdvanceLines(&wordLine, last, tokenPtr->start); + TclAdvanceContinuations(&wordLine, &wordNext, + tokenPtr->start - envPtr->source); wwlines[wordIdx] = (TclWordKnownAtCompileTime(tokenPtr, NULL) ? wordLine : -1); ePtr->line[wordIdx] = wordLine; @@ -2640,6 +3243,7 @@ TclCreateExceptRange( * new ExceptionRange structure. */ { register ExceptionRange *rangePtr; + register ExceptionAux *auxPtr; int index = envPtr->exceptArrayNext; if (index >= envPtr->exceptArrayEnd) { @@ -2651,28 +3255,36 @@ TclCreateExceptRange( size_t currBytes = envPtr->exceptArrayNext * sizeof(ExceptionRange); + size_t currBytes2 = envPtr->exceptArrayNext * sizeof(ExceptionAux); int newElems = 2*envPtr->exceptArrayEnd; size_t newBytes = newElems * sizeof(ExceptionRange); + size_t newBytes2 = newElems * sizeof(ExceptionAux); if (envPtr->mallocedExceptArray) { - envPtr->exceptArrayPtr = (ExceptionRange *) - ckrealloc((char *)(envPtr->exceptArrayPtr), newBytes); + envPtr->exceptArrayPtr = + ckrealloc(envPtr->exceptArrayPtr, newBytes); + envPtr->exceptAuxArrayPtr = + ckrealloc(envPtr->exceptAuxArrayPtr, newBytes2); } else { /* * envPtr->exceptArrayPtr isn't a ckalloc'd pointer, so we must * code a ckrealloc equivalent for ourselves. */ - ExceptionRange *newPtr = (ExceptionRange *) - ckalloc((unsigned) newBytes); + + ExceptionRange *newPtr = ckalloc(newBytes); + ExceptionAux *newPtr2 = ckalloc(newBytes2); + memcpy(newPtr, envPtr->exceptArrayPtr, currBytes); + memcpy(newPtr2, envPtr->exceptAuxArrayPtr, currBytes2); envPtr->exceptArrayPtr = newPtr; + envPtr->exceptAuxArrayPtr = newPtr2; envPtr->mallocedExceptArray = 1; } envPtr->exceptArrayEnd = newElems; } envPtr->exceptArrayNext++; - rangePtr = &(envPtr->exceptArrayPtr[index]); + rangePtr = &envPtr->exceptArrayPtr[index]; rangePtr->type = type; rangePtr->nestingLevel = envPtr->exceptDepth; rangePtr->codeOffset = -1; @@ -2680,10 +3292,301 @@ TclCreateExceptRange( rangePtr->breakOffset = -1; rangePtr->continueOffset = -1; rangePtr->catchOffset = -1; + auxPtr = &envPtr->exceptAuxArrayPtr[index]; + auxPtr->supportsContinue = 1; + auxPtr->stackDepth = envPtr->currStackDepth; + auxPtr->expandTarget = envPtr->expandCount; + auxPtr->expandTargetDepth = -1; + auxPtr->numBreakTargets = 0; + auxPtr->breakTargets = NULL; + auxPtr->allocBreakTargets = 0; + auxPtr->numContinueTargets = 0; + auxPtr->continueTargets = NULL; + auxPtr->allocContinueTargets = 0; return index; } /* + * --------------------------------------------------------------------- + * + * TclGetInnermostExceptionRange -- + * + * Returns the innermost exception range that covers the current code + * creation point, and (optionally) the stack depth that is expected at + * that point. Relies on the fact that the range has a numCodeBytes = -1 + * when it is being populated and that inner ranges come after outer + * ranges. + * + * --------------------------------------------------------------------- + */ + +ExceptionRange * +TclGetInnermostExceptionRange( + CompileEnv *envPtr, + int returnCode, + ExceptionAux **auxPtrPtr) +{ + int exnIdx = -1, i; + + for (i=0 ; i<envPtr->exceptArrayNext ; i++) { + ExceptionRange *rangePtr = &envPtr->exceptArrayPtr[i]; + + if (CurrentOffset(envPtr) >= rangePtr->codeOffset && + (rangePtr->numCodeBytes == -1 || CurrentOffset(envPtr) < + rangePtr->codeOffset+rangePtr->numCodeBytes) && + (returnCode != TCL_CONTINUE || + envPtr->exceptAuxArrayPtr[i].supportsContinue)) { + exnIdx = i; + } + } + if (exnIdx == -1) { + return NULL; + } + if (auxPtrPtr) { + *auxPtrPtr = &envPtr->exceptAuxArrayPtr[exnIdx]; + } + return &envPtr->exceptArrayPtr[exnIdx]; +} + +/* + * --------------------------------------------------------------------- + * + * TclAddLoopBreakFixup, TclAddLoopContinueFixup -- + * + * Adds a place that wants to break/continue to the loop exception range + * tracking that will be fixed up once the loop can be finalized. These + * functions will generate an INST_JUMP4 that will be fixed up during the + * loop finalization. + * + * --------------------------------------------------------------------- + */ + +void +TclAddLoopBreakFixup( + CompileEnv *envPtr, + ExceptionAux *auxPtr) +{ + int range = auxPtr - envPtr->exceptAuxArrayPtr; + + if (envPtr->exceptArrayPtr[range].type != LOOP_EXCEPTION_RANGE) { + Tcl_Panic("trying to add 'break' fixup to full exception range"); + } + + if (++auxPtr->numBreakTargets > auxPtr->allocBreakTargets) { + auxPtr->allocBreakTargets *= 2; + auxPtr->allocBreakTargets += 2; + if (auxPtr->breakTargets) { + auxPtr->breakTargets = ckrealloc(auxPtr->breakTargets, + sizeof(int) * auxPtr->allocBreakTargets); + } else { + auxPtr->breakTargets = + ckalloc(sizeof(int) * auxPtr->allocBreakTargets); + } + } + auxPtr->breakTargets[auxPtr->numBreakTargets - 1] = CurrentOffset(envPtr); + TclEmitInstInt4(INST_JUMP4, 0, envPtr); +} + +void +TclAddLoopContinueFixup( + CompileEnv *envPtr, + ExceptionAux *auxPtr) +{ + int range = auxPtr - envPtr->exceptAuxArrayPtr; + + if (envPtr->exceptArrayPtr[range].type != LOOP_EXCEPTION_RANGE) { + Tcl_Panic("trying to add 'continue' fixup to full exception range"); + } + + if (++auxPtr->numContinueTargets > auxPtr->allocContinueTargets) { + auxPtr->allocContinueTargets *= 2; + auxPtr->allocContinueTargets += 2; + if (auxPtr->continueTargets) { + auxPtr->continueTargets = ckrealloc(auxPtr->continueTargets, + sizeof(int) * auxPtr->allocContinueTargets); + } else { + auxPtr->continueTargets = + ckalloc(sizeof(int) * auxPtr->allocContinueTargets); + } + } + auxPtr->continueTargets[auxPtr->numContinueTargets - 1] = + CurrentOffset(envPtr); + TclEmitInstInt4(INST_JUMP4, 0, envPtr); +} + +/* + * --------------------------------------------------------------------- + * + * TclCleanupStackForBreakContinue -- + * + * Ditch the extra elements from the auxiliary stack and the main + * stack. How to do this exactly depends on whether there are any + * elements on the auxiliary stack to pop. + * + * --------------------------------------------------------------------- + */ + +void +TclCleanupStackForBreakContinue( + CompileEnv *envPtr, + ExceptionAux *auxPtr) +{ + int savedStackDepth = envPtr->currStackDepth; + int toPop = envPtr->expandCount - auxPtr->expandTarget; + + if (toPop > 0) { + while (toPop > 0) { + TclEmitOpcode(INST_EXPAND_DROP, envPtr); + toPop--; + } + TclAdjustStackDepth(auxPtr->expandTargetDepth - envPtr->currStackDepth, + envPtr); + toPop = auxPtr->expandTargetDepth - auxPtr->stackDepth; + while (toPop > 0) { + TclEmitOpcode(INST_POP, envPtr); + toPop--; + } + } else { + toPop = envPtr->currStackDepth - auxPtr->stackDepth; + while (toPop > 0) { + TclEmitOpcode(INST_POP, envPtr); + toPop--; + } + } + envPtr->currStackDepth = savedStackDepth; +} + +/* + * --------------------------------------------------------------------- + * + * StartExpanding -- + * + * Pushes an INST_EXPAND_START and does some additional housekeeping so + * that the [break] and [continue] compilers can use an exception-free + * issue to discard it. + * + * --------------------------------------------------------------------- + */ + +static void +StartExpanding( + CompileEnv *envPtr) +{ + int i; + + TclEmitOpcode(INST_EXPAND_START, envPtr); + + /* + * Update inner exception ranges with information about the environment + * where this expansion started. + */ + + for (i=0 ; i<envPtr->exceptArrayNext ; i++) { + ExceptionRange *rangePtr = &envPtr->exceptArrayPtr[i]; + ExceptionAux *auxPtr = &envPtr->exceptAuxArrayPtr[i]; + + /* + * Ignore loops unless they're still being built. + */ + + if (rangePtr->codeOffset > CurrentOffset(envPtr)) { + continue; + } + if (rangePtr->numCodeBytes != -1) { + continue; + } + + /* + * Adequate condition: further out loops and further in exceptions + * don't actually need this information. + */ + + if (auxPtr->expandTarget == envPtr->expandCount) { + auxPtr->expandTargetDepth = envPtr->currStackDepth; + } + } + + /* + * There's now one more expansion being processed on the auxiliary stack. + */ + + envPtr->expandCount++; +} + +/* + * --------------------------------------------------------------------- + * + * TclFinalizeLoopExceptionRange -- + * + * Finalizes a loop exception range, binding the registered [break] and + * [continue] implementations so that they jump to the correct place. + * Note that this must only be called after *all* the exception range + * target offsets have been set. + * + * --------------------------------------------------------------------- + */ + +void +TclFinalizeLoopExceptionRange( + CompileEnv *envPtr, + int range) +{ + ExceptionRange *rangePtr = &envPtr->exceptArrayPtr[range]; + ExceptionAux *auxPtr = &envPtr->exceptAuxArrayPtr[range]; + int i, offset; + unsigned char *site; + + if (rangePtr->type != LOOP_EXCEPTION_RANGE) { + Tcl_Panic("trying to finalize a loop exception range"); + } + + /* + * Do the jump fixups. Note that these are always issued as INST_JUMP4 so + * there is no need to fuss around with updating code offsets. + */ + + for (i=0 ; i<auxPtr->numBreakTargets ; i++) { + site = envPtr->codeStart + auxPtr->breakTargets[i]; + offset = rangePtr->breakOffset - auxPtr->breakTargets[i]; + TclUpdateInstInt4AtPc(INST_JUMP4, offset, site); + } + for (i=0 ; i<auxPtr->numContinueTargets ; i++) { + site = envPtr->codeStart + auxPtr->continueTargets[i]; + if (rangePtr->continueOffset == -1) { + int j; + + /* + * WTF? Can't bind, so revert to an INST_CONTINUE. Not enough + * space to do anything else. + */ + + *site = INST_CONTINUE; + for (j=0 ; j<4 ; j++) { + *++site = INST_NOP; + } + } else { + offset = rangePtr->continueOffset - auxPtr->continueTargets[i]; + TclUpdateInstInt4AtPc(INST_JUMP4, offset, site); + } + } + + /* + * Drop the arrays we were holding the only reference to. + */ + + if (auxPtr->breakTargets) { + ckfree(auxPtr->breakTargets); + auxPtr->breakTargets = NULL; + auxPtr->numBreakTargets = 0; + } + if (auxPtr->continueTargets) { + ckfree(auxPtr->continueTargets); + auxPtr->continueTargets = NULL; + auxPtr->numContinueTargets = 0; + } +} + +/* *---------------------------------------------------------------------- * * TclCreateAuxData -- @@ -2710,14 +3613,14 @@ int TclCreateAuxData( ClientData clientData, /* The compilation auxiliary data to store in * the new aux data record. */ - AuxDataType *typePtr, /* Pointer to the type to attach to this + const AuxDataType *typePtr, /* Pointer to the type to attach to this * AuxData */ register CompileEnv *envPtr)/* Points to the CompileEnv for which a new * aux data structure is to be allocated. */ { int index; /* Index for the new AuxData structure. */ register AuxData *auxDataPtr; - /* Points to the new AuxData structure */ + /* Points to the new AuxData structure */ index = envPtr->auxDataArrayNext; if (index >= envPtr->auxDataArrayEnd) { @@ -2732,14 +3635,16 @@ TclCreateAuxData( size_t newBytes = newElems * sizeof(AuxData); if (envPtr->mallocedAuxDataArray) { - envPtr->auxDataArrayPtr = (AuxData *) - ckrealloc((char *)(envPtr->auxDataArrayPtr), newBytes); + envPtr->auxDataArrayPtr = + ckrealloc(envPtr->auxDataArrayPtr, newBytes); } else { /* * envPtr->auxDataArrayPtr isn't a ckalloc'd pointer, so we must * code a ckrealloc equivalent for ourselves. */ - AuxData *newPtr = (AuxData *) ckalloc((unsigned) newBytes); + + AuxData *newPtr = ckalloc(newBytes); + memcpy(newPtr, envPtr->auxDataArrayPtr, currBytes); envPtr->auxDataArrayPtr = newPtr; envPtr->mallocedAuxDataArray = 1; @@ -2748,7 +3653,7 @@ TclCreateAuxData( } envPtr->auxDataArrayNext++; - auxDataPtr = &(envPtr->auxDataArrayPtr[index]); + auxDataPtr = &envPtr->auxDataArrayPtr[index]; auxDataPtr->clientData = clientData; auxDataPtr->type = typePtr; return index; @@ -2779,7 +3684,7 @@ TclInitJumpFixupArray( { fixupArrayPtr->fixup = fixupArrayPtr->staticFixupSpace; fixupArrayPtr->next = 0; - fixupArrayPtr->end = (JUMPFIXUP_INIT_ENTRIES - 1); + fixupArrayPtr->end = JUMPFIXUP_INIT_ENTRIES - 1; fixupArrayPtr->mallocedArray = 0; } @@ -2806,8 +3711,8 @@ TclInitJumpFixupArray( void TclExpandJumpFixupArray( register JumpFixupArray *fixupArrayPtr) - /* Points to the JumpFixupArray structure - * to enlarge. */ + /* Points to the JumpFixupArray structure to + * enlarge. */ { /* * The currently allocated jump fixup entries are stored from fixup[0] up @@ -2820,14 +3725,15 @@ TclExpandJumpFixupArray( size_t newBytes = newElems * sizeof(JumpFixup); if (fixupArrayPtr->mallocedArray) { - fixupArrayPtr->fixup = (JumpFixup *) - ckrealloc((char *)(fixupArrayPtr->fixup), newBytes); + fixupArrayPtr->fixup = ckrealloc(fixupArrayPtr->fixup, newBytes); } else { /* - * fixupArrayPtr->fixup isn't a ckalloc'd pointer, so we must - * code a ckrealloc equivalent for ourselves. + * fixupArrayPtr->fixup isn't a ckalloc'd pointer, so we must code a + * ckrealloc equivalent for ourselves. */ - JumpFixup *newPtr = (JumpFixup *) ckalloc((unsigned) newBytes); + + JumpFixup *newPtr = ckalloc(newBytes); + memcpy(newPtr, fixupArrayPtr->fixup, currBytes); fixupArrayPtr->fixup = newPtr; fixupArrayPtr->mallocedArray = 1; @@ -2858,7 +3764,7 @@ TclFreeJumpFixupArray( * free. */ { if (fixupArrayPtr->mallocedArray) { - ckfree((char *) fixupArrayPtr->fixup); + ckfree(fixupArrayPtr->fixup); } } @@ -2903,7 +3809,7 @@ TclEmitForwardJump( */ jumpFixupPtr->jumpType = jumpType; - jumpFixupPtr->codeOffset = (envPtr->codeNext - envPtr->codeStart); + jumpFixupPtr->codeOffset = envPtr->codeNext - envPtr->codeStart; jumpFixupPtr->cmdIndex = envPtr->numCommands; jumpFixupPtr->exceptIndex = envPtr->exceptArrayNext; @@ -2961,7 +3867,7 @@ TclFixupForwardJump( unsigned numBytes; if (jumpDist <= distThreshold) { - jumpPc = (envPtr->codeStart + jumpFixupPtr->codeOffset); + jumpPc = envPtr->codeStart + jumpFixupPtr->codeOffset; switch (jumpFixupPtr->jumpType) { case TCL_UNCONDITIONAL_JUMP: TclUpdateInstInt1AtPc(INST_JUMP1, jumpDist, jumpPc); @@ -2986,7 +3892,7 @@ TclFixupForwardJump( if ((envPtr->codeNext + 3) > envPtr->codeEnd) { TclExpandCodeArray(envPtr); } - jumpPc = (envPtr->codeStart + jumpFixupPtr->codeOffset); + jumpPc = envPtr->codeStart + jumpFixupPtr->codeOffset; numBytes = envPtr->codeNext-jumpPc-2; p = jumpPc+2; memmove(p+3, p, numBytes); @@ -3011,19 +3917,19 @@ TclFixupForwardJump( */ firstCmd = jumpFixupPtr->cmdIndex; - lastCmd = (envPtr->numCommands - 1); + lastCmd = envPtr->numCommands - 1; if (firstCmd < lastCmd) { for (k = firstCmd; k <= lastCmd; k++) { - (envPtr->cmdMapPtr[k]).codeOffset += 3; + envPtr->cmdMapPtr[k].codeOffset += 3; } } firstRange = jumpFixupPtr->exceptIndex; - lastRange = (envPtr->exceptArrayNext - 1); + lastRange = envPtr->exceptArrayNext - 1; for (k = firstRange; k <= lastRange; k++) { - ExceptionRange *rangePtr = &(envPtr->exceptArrayPtr[k]); - rangePtr->codeOffset += 3; + ExceptionRange *rangePtr = &envPtr->exceptArrayPtr[k]; + rangePtr->codeOffset += 3; switch (rangePtr->type) { case LOOP_EXCEPTION_RANGE: rangePtr->breakOffset += 3; @@ -3040,6 +3946,22 @@ TclFixupForwardJump( } } + for (k = 0 ; k < envPtr->exceptArrayNext ; k++) { + ExceptionAux *auxPtr = &envPtr->exceptAuxArrayPtr[k]; + int i; + + for (i=0 ; i<auxPtr->numBreakTargets ; i++) { + if (jumpFixupPtr->codeOffset < auxPtr->breakTargets[i]) { + auxPtr->breakTargets[i] += 3; + } + } + for (i=0 ; i<auxPtr->numContinueTargets ; i++) { + if (jumpFixupPtr->codeOffset < auxPtr->continueTargets[i]) { + auxPtr->continueTargets[i] += 3; + } + } + } + /* * TIP #280: Adjust the mapping from PC values to the per-command * information about arguments and their line numbers. @@ -3100,7 +4022,7 @@ TclFixupForwardJump( Tcl_SetHashValue(hPtr, INT2PTR(map[k].cmd)); } - ckfree ((char *) map); + ckfree (map); } return 1; /* the jump was grown */ @@ -3125,7 +4047,7 @@ TclFixupForwardJump( *---------------------------------------------------------------------- */ -void * /* == InstructionDesc* == */ +const void * /* == InstructionDesc* == */ TclGetInstructionTable(void) { return &tclInstructionTable[0]; @@ -3152,7 +4074,7 @@ TclGetInstructionTable(void) static void RegisterAuxDataType( - AuxDataType *typePtr) /* Information about object type; storage must + const AuxDataType *typePtr) /* Information about object type; storage must * be statically allocated (must live forever; * will not be deallocated). */ { @@ -3201,12 +4123,12 @@ RegisterAuxDataType( *---------------------------------------------------------------------- */ -AuxDataType * +const AuxDataType * TclGetAuxDataType( - char *typeName) /* Name of AuxData type to look up. */ + const char *typeName) /* Name of AuxData type to look up. */ { register Tcl_HashEntry *hPtr; - AuxDataType *typePtr = NULL; + const AuxDataType *typePtr = NULL; Tcl_MutexLock(&tableMutex); if (!auxDataTypeTableInitialized) { @@ -3215,7 +4137,7 @@ TclGetAuxDataType( hPtr = Tcl_FindHashEntry(&auxDataTypeTable, typeName); if (hPtr != NULL) { - typePtr = (AuxDataType *) Tcl_GetHashValue(hPtr); + typePtr = Tcl_GetHashValue(hPtr); } Tcl_MutexUnlock(&tableMutex); @@ -3252,11 +4174,12 @@ TclInitAuxDataTypeTable(void) Tcl_InitHashTable(&auxDataTypeTable, TCL_STRING_KEYS); /* - * There are only two AuxData type at this time, so register them here. + * There are only three AuxData types at this time, so register them here. */ RegisterAuxDataType(&tclForeachInfoType); RegisterAuxDataType(&tclJumptableInfoType); + RegisterAuxDataType(&tclDictUpdateInfoType); } /* @@ -3324,13 +4247,13 @@ GetCmdLocEncodingSize( codeDeltaNext = codeLengthNext = srcDeltaNext = srcLengthNext = 0; prevCodeOffset = prevSrcOffset = 0; for (i = 0; i < numCmds; i++) { - codeDelta = (mapPtr[i].codeOffset - prevCodeOffset); + codeDelta = mapPtr[i].codeOffset - prevCodeOffset; if (codeDelta < 0) { Tcl_Panic("GetCmdLocEncodingSize: bad code offset"); } else if (codeDelta <= 127) { codeDeltaNext++; } else { - codeDeltaNext += 5; /* 1 byte for 0xFF, 4 for positive delta */ + codeDeltaNext += 5; /* 1 byte for 0xFF, 4 for positive delta */ } prevCodeOffset = mapPtr[i].codeOffset; @@ -3340,14 +4263,14 @@ GetCmdLocEncodingSize( } else if (codeLen <= 127) { codeLengthNext++; } else { - codeLengthNext += 5; /* 1 byte for 0xFF, 4 for length */ + codeLengthNext += 5;/* 1 byte for 0xFF, 4 for length */ } - srcDelta = (mapPtr[i].srcOffset - prevSrcOffset); - if ((-127 <= srcDelta) && (srcDelta <= 127)) { + srcDelta = mapPtr[i].srcOffset - prevSrcOffset; + if ((-127 <= srcDelta) && (srcDelta <= 127) && (srcDelta != -1)) { srcDeltaNext++; } else { - srcDeltaNext += 5; /* 1 byte for 0xFF, 4 for delta */ + srcDeltaNext += 5; /* 1 byte for 0xFF, 4 for delta */ } prevSrcOffset = mapPtr[i].srcOffset; @@ -3357,7 +4280,7 @@ GetCmdLocEncodingSize( } else if (srcLen <= 127) { srcLengthNext++; } else { - srcLengthNext += 5; /* 1 byte for 0xFF, 4 for length */ + srcLengthNext += 5; /* 1 byte for 0xFF, 4 for length */ } } @@ -3409,7 +4332,7 @@ EncodeCmdLocMap( codePtr->codeDeltaStart = p; prevOffset = 0; for (i = 0; i < numCmds; i++) { - codeDelta = (mapPtr[i].codeOffset - prevOffset); + codeDelta = mapPtr[i].codeOffset - prevOffset; if (codeDelta < 0) { Tcl_Panic("EncodeCmdLocMap: bad code offset"); } else if (codeDelta <= 127) { @@ -3451,8 +4374,8 @@ EncodeCmdLocMap( codePtr->srcDeltaStart = p; prevOffset = 0; for (i = 0; i < numCmds; i++) { - srcDelta = (mapPtr[i].srcOffset - prevOffset); - if ((-127 <= srcDelta) && (srcDelta <= 127)) { + srcDelta = mapPtr[i].srcOffset - prevOffset; + if ((-127 <= srcDelta) && (srcDelta <= 127) && (srcDelta != -1)) { TclStoreInt1AtPtr(srcDelta, p); p++; } else { @@ -3536,7 +4459,7 @@ TclPrintByteCodeObj( int TclPrintInstruction( ByteCode *codePtr, /* Bytecode containing the instruction. */ - unsigned char *pc) /* Points to first byte of instruction. */ + const unsigned char *pc) /* Points to first byte of instruction. */ { Tcl_Obj *bufferObj; int numBytes; @@ -3643,7 +4566,7 @@ TclDisassembleByteCodeObj( } codeStart = codePtr->codeStart; - codeLimit = (codeStart + codePtr->numCodeBytes); + codeLimit = codeStart + codePtr->numCodeBytes; numCmds = codePtr->numCommands; /* @@ -3728,7 +4651,7 @@ TclDisassembleByteCodeObj( Tcl_AppendPrintfToObj(bufferObj, " Exception ranges %d, depth %d:\n", codePtr->numExceptRanges, codePtr->maxExceptDepth); for (i = 0; i < codePtr->numExceptRanges; i++) { - ExceptionRange *rangePtr = &(codePtr->exceptArrayPtr[i]); + ExceptionRange *rangePtr = &codePtr->exceptArrayPtr[i]; Tcl_AppendPrintfToObj(bufferObj, " %d: level %d, %s, pc %d-%d, ", @@ -3817,7 +4740,7 @@ TclDisassembleByteCodeObj( } Tcl_AppendPrintfToObj(bufferObj, "%s%4d: pc %d-%d, src %d-%d", - ((i % 2)? " " : "\n "), + ((i % 2)? " " : "\n "), (i+1), codeOffset, (codeOffset + codeLen - 1), srcOffset, (srcOffset + srcLen - 1)); } @@ -3906,12 +4829,12 @@ TclDisassembleByteCodeObj( static int FormatInstruction( ByteCode *codePtr, /* Bytecode containing the instruction. */ - unsigned char *pc, /* Points to first byte of instruction. */ + const unsigned char *pc, /* Points to first byte of instruction. */ Tcl_Obj *bufferObj) /* Object to append instruction info to. */ { Proc *procPtr = codePtr->procPtr; unsigned char opCode = *pc; - register InstructionDesc *instDesc = &tclInstructionTable[opCode]; + register const InstructionDesc *instDesc = &tclInstructionTable[opCode]; unsigned char *codeStart = codePtr->codeStart; unsigned pcOffset = pc - codeStart; int opnd = 0, i, j, numBytes = 1; @@ -4007,7 +4930,7 @@ FormatInstruction( } } if (suffixObj) { - char *bytes; + const char *bytes; int length; Tcl_AppendToObj(bufferObj, "\t# ", -1); @@ -4032,6 +4955,177 @@ FormatInstruction( /* *---------------------------------------------------------------------- * + * TclGetInnerContext -- + * + * If possible, returns a list capturing the inner context. Otherwise + * return NULL. + * + *---------------------------------------------------------------------- + */ + +Tcl_Obj * +TclGetInnerContext( + Tcl_Interp *interp, + const unsigned char *pc, + Tcl_Obj **tosPtr) +{ + int objc = 0, off = 0; + Tcl_Obj *result; + Interp *iPtr = (Interp *) interp; + + switch (*pc) { + case INST_STR_LEN: + case INST_LNOT: + case INST_BITNOT: + case INST_UMINUS: + case INST_UPLUS: + case INST_TRY_CVT_TO_NUMERIC: + case INST_EXPAND_STKTOP: + case INST_EXPR_STK: + objc = 1; + break; + + case INST_LIST_IN: + case INST_LIST_NOT_IN: /* Basic list containment operators. */ + case INST_STR_EQ: + case INST_STR_NEQ: /* String (in)equality check */ + case INST_STR_CMP: /* String compare. */ + case INST_STR_INDEX: + case INST_STR_MATCH: + case INST_REGEXP: + case INST_EQ: + case INST_NEQ: + case INST_LT: + case INST_GT: + case INST_LE: + case INST_GE: + case INST_MOD: + case INST_LSHIFT: + case INST_RSHIFT: + case INST_BITOR: + case INST_BITXOR: + case INST_BITAND: + case INST_EXPON: + case INST_ADD: + case INST_SUB: + case INST_DIV: + case INST_MULT: + objc = 2; + break; + + case INST_RETURN_STK: + /* early pop. TODO: dig out opt dict too :/ */ + objc = 1; + break; + + case INST_SYNTAX: + case INST_RETURN_IMM: + objc = 2; + break; + + case INST_INVOKE_STK4: + objc = TclGetUInt4AtPtr(pc+1); + break; + + case INST_INVOKE_STK1: + objc = TclGetUInt1AtPtr(pc+1); + break; + } + + result = iPtr->innerContext; + if (Tcl_IsShared(result)) { + Tcl_DecrRefCount(result); + iPtr->innerContext = result = Tcl_NewListObj(objc + 1, NULL); + Tcl_IncrRefCount(result); + } else { + int len; + + /* + * Reset while keeping the list intrep as much as possible. + */ + + Tcl_ListObjLength(interp, result, &len); + Tcl_ListObjReplace(interp, result, 0, len, 0, NULL); + } + Tcl_ListObjAppendElement(NULL, result, TclNewInstNameObj(*pc)); + + for (; objc>0 ; objc--) { + Tcl_Obj *objPtr; + + objPtr = tosPtr[1 - objc + off]; + if (!objPtr) { + Tcl_Panic("InnerContext: bad tos -- appending null object"); + } + if ((objPtr->refCount<=0) +#ifdef TCL_MEM_DEBUG + || (objPtr->refCount==0x61616161) +#endif + ) { + Tcl_Panic("InnerContext: bad tos -- appending freed object %p", + objPtr); + } + Tcl_ListObjAppendElement(NULL, result, objPtr); + } + + return result; +} + +/* + *---------------------------------------------------------------------- + * + * TclNewInstNameObj -- + * + * Creates a new InstName Tcl_Obj based on the given instruction + * + *---------------------------------------------------------------------- + */ + +Tcl_Obj * +TclNewInstNameObj( + unsigned char inst) +{ + Tcl_Obj *objPtr = Tcl_NewObj(); + + objPtr->typePtr = &tclInstNameType; + objPtr->internalRep.longValue = (long) inst; + objPtr->bytes = NULL; + + return objPtr; +} + +/* + *---------------------------------------------------------------------- + * + * UpdateStringOfInstName -- + * + * Update the string representation for an instruction name object. + * + *---------------------------------------------------------------------- + */ + +static void +UpdateStringOfInstName( + Tcl_Obj *objPtr) +{ + int inst = objPtr->internalRep.longValue; + char *s, buf[20]; + int len; + + if ((inst < 0) || (inst > LAST_INST_OPCODE)) { + sprintf(buf, "inst_%d", inst); + s = buf; + } else { + s = (char *) tclInstructionTable[objPtr->internalRep.longValue].name; + } + len = strlen(s); + objPtr->bytes = ckalloc(len + 1); + memcpy(objPtr->bytes, s, len + 1); + objPtr->length = len; +} + +/* + *---------------------------------------------------------------------- + * * PrintSourceToObj -- * * Appends a quoted representation of a string to a Tcl_Obj. @@ -4125,7 +5219,7 @@ RecordByteCodeStats( statsPtr->currentByteCodeBytes += (double) codePtr->structureSize; statsPtr->srcCount[TclLog2(codePtr->numSrcBytes)]++; - statsPtr->byteCodeCount[TclLog2((int)(codePtr->structureSize))]++; + statsPtr->byteCodeCount[TclLog2((int) codePtr->structureSize)]++; statsPtr->currentInstBytes += (double) codePtr->numCodeBytes; statsPtr->currentLitBytes += (double) @@ -4143,5 +5237,6 @@ RecordByteCodeStats( * mode: c * c-basic-offset: 4 * fill-column: 78 + * tab-width: 8 * End: */ |