tclProc.c Go to the documentation of this file. /* * tclProc.c -- * * This file contains routines that implement Tcl procedures, including * the "proc" and "uplevel" commands. * * Copyright (c) 1987-1993 The Regents of the University of California. * Copyright (c) 1994-1998 Sun Microsystems, Inc. * Copyright (c) 2004-2006 Miguel Sofer * Copyright (c) 2007 Daniel A. Steffen <das@users.sourceforge.net> * * See the file "license.terms" for information on usage and redistribution of * this file, and for a DISCLAIMER OF ALL WARRANTIES. * * RCS: @(#) $Id: tclProc.c,v 1.139 2007/12/13 15:23:20 dgp Exp $ */ #include "tclInt.h" #include "tclCompile.h" /* * Prototypes for static functions in this file */ static void DupLambdaInternalRep(Tcl_Obj *objPtr, Tcl_Obj *copyPtr); static void FreeLambdaInternalRep(Tcl_Obj *objPtr); static int InitArgsAndLocals(Tcl_Interp *interp, Tcl_Obj *procNameObj, int skip); static void InitResolvedLocals(Tcl_Interp *interp, ByteCode *codePtr, Var *defPtr, Namespace *nsPtr); static void InitLocalCache(Proc *procPtr); static int PushProcCallFrame(ClientData clientData, register Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[], int isLambda); static void ProcBodyDup(Tcl_Obj *srcPtr, Tcl_Obj *dupPtr); static void ProcBodyFree(Tcl_Obj *objPtr); static int ProcWrongNumArgs(Tcl_Interp *interp, int skip); static void MakeProcError(Tcl_Interp *interp, Tcl_Obj *procNameObj); static void MakeLambdaError(Tcl_Interp *interp, Tcl_Obj *procNameObj); static int SetLambdaFromAny(Tcl_Interp *interp, Tcl_Obj *objPtr); static int ProcCompileProc(Tcl_Interp *interp, Proc *procPtr, Tcl_Obj *bodyPtr, Namespace *nsPtr, CONST char *description, CONST char *procName, Proc **procPtrPtr); /* * The ProcBodyObjType type */ Tcl_ObjType tclProcBodyType = { "procbody", /* name for this type */ ProcBodyFree, /* FreeInternalRep function */ ProcBodyDup, /* DupInternalRep function */ NULL, /* UpdateString function; Tcl_GetString and * Tcl_GetStringFromObj should panic * instead. */ NULL /* SetFromAny function; Tcl_ConvertToType * should panic instead. */ }; /* * The [upvar]/[uplevel] level reference type. Uses the twoPtrValue field, * encoding the type of level reference in ptr1 and the actual parsed out * offset in ptr2. * * Uses the default behaviour throughout, and never disposes of the string * rep; it's just a cache type. */ static Tcl_ObjType levelReferenceType = { "levelReference", NULL, NULL, NULL, NULL }; /* * The type of lambdas. Note that every lambda will *always* have a string * representation. * * Internally, ptr1 is a pointer to a Proc instance that is not bound to a * command name, and ptr2 is a pointer to the namespace that the Proc instance * will execute within. */ static Tcl_ObjType lambdaType = { "lambdaExpr", /* name */ FreeLambdaInternalRep, /* freeIntRepProc */ DupLambdaInternalRep, /* dupIntRepProc */ NULL, /* updateStringProc */ SetLambdaFromAny /* setFromAnyProc */ };  /* *---------------------------------------------------------------------- * * Tcl_ProcObjCmd -- * * This object-based function is invoked to process the "proc" Tcl * command. See the user documentation for details on what it does. * * Results: * A standard Tcl object result value. * * Side effects: * A new procedure gets created. * *---------------------------------------------------------------------- */ /* ARGSUSED */ int Tcl_ProcObjCmd( ClientData dummy, /* Not used. */ Tcl_Interp *interp, /* Current interpreter. */ int objc, /* Number of arguments. */ Tcl_Obj *CONST objv[]) /* Argument objects. */ { register Interp *iPtr = (Interp *) interp; Proc *procPtr; char *fullName; CONST char *procName, *procArgs, *procBody; Namespace *nsPtr, *altNsPtr, *cxtNsPtr; Tcl_Command cmd; Tcl_DString ds; if (objc != 4) { Tcl_WrongNumArgs(interp, 1, objv, "name args body"); return TCL_ERROR; } /* * Determine the namespace where the procedure should reside. Unless the * command name includes namespace qualifiers, this will be the current * namespace. */ fullName = TclGetString(objv[1]); TclGetNamespaceForQualName(interp, fullName, NULL, 0, &nsPtr, &altNsPtr, &cxtNsPtr, &procName); if (nsPtr == NULL) { Tcl_AppendResult(interp, "can't create procedure \"", fullName, "\": unknown namespace", NULL); return TCL_ERROR; } if (procName == NULL) { Tcl_AppendResult(interp, "can't create procedure \"", fullName, "\": bad procedure name", NULL); return TCL_ERROR; } if ((nsPtr != iPtr->globalNsPtr) && (procName != NULL) && (procName[0] == ':')) { Tcl_AppendResult(interp, "can't create procedure \"", procName, "\" in non-global namespace with name starting with \":\"", NULL); return TCL_ERROR; } /* * Create the data structure to represent the procedure. */ if (TclCreateProc(interp, nsPtr, procName, objv[2], objv[3], &procPtr) != TCL_OK) { Tcl_AddErrorInfo(interp, "\n (creating proc \""); Tcl_AddErrorInfo(interp, procName); Tcl_AddErrorInfo(interp, "\")"); return TCL_ERROR; } /* * Now create a command for the procedure. This will initially be in the * current namespace unless the procedure's name included namespace * qualifiers. To create the new command in the right namespace, we * generate a fully qualified name for it. */ Tcl_DStringInit(&ds); if (nsPtr != iPtr->globalNsPtr) { Tcl_DStringAppend(&ds, nsPtr->fullName, -1); Tcl_DStringAppend(&ds, "::", 2); } Tcl_DStringAppend(&ds, procName, -1); cmd = Tcl_CreateObjCommand(interp, Tcl_DStringValue(&ds), TclObjInterpProc, (ClientData) procPtr, TclProcDeleteProc); Tcl_DStringFree(&ds); /* * Now initialize the new procedure's cmdPtr field. This will be used * later when the procedure is called to determine what namespace the * procedure will run in. This will be different than the current * namespace if the proc was renamed into a different namespace. */ procPtr->cmdPtr = (Command *) cmd; /* * TIP #280: Remember the line the procedure body is starting on. In a * bytecode context we ask the engine to provide us with the necessary * information. This is for the initialization of the byte code compiler * when the body is used for the first time. * * This code is nearly identical to the #280 code in SetLambdaFromAny, see * this file. The differences are the different index of the body in the * line array of the context, and the lamdba code requires some special * processing. Find a way to factor the common elements into a single * function. */ if (iPtr->cmdFramePtr) { CmdFrame *contextPtr; contextPtr = (CmdFrame *) TclStackAlloc(interp, sizeof(CmdFrame)); *contextPtr = *iPtr->cmdFramePtr; if (contextPtr->type == TCL_LOCATION_BC) { /* * Retrieve source information from the bytecode, if possible. If * the information is retrieved successfully, context.type will be * TCL_LOCATION_SOURCE and the reference held by * context.data.eval.path will be counted. */ TclGetSrcInfoForPc(contextPtr); } else if (contextPtr->type == TCL_LOCATION_SOURCE) { /* * The copy into 'context' up above has created another reference * to 'context.data.eval.path'; account for it. */ Tcl_IncrRefCount(contextPtr->data.eval.path); } if (contextPtr->type == TCL_LOCATION_SOURCE) { /* * We can account for source location within a proc only if the * proc body was not created by substitution. */ if (contextPtr->line && (contextPtr->nline >= 4) && (contextPtr->line[3] >= 0)) { int isNew; CmdFrame *cfPtr = (CmdFrame *) ckalloc(sizeof(CmdFrame)); cfPtr->level = -1; cfPtr->type = contextPtr->type; cfPtr->line = (int *) ckalloc(sizeof(int)); cfPtr->line[0] = contextPtr->line[3]; cfPtr->nline = 1; cfPtr->framePtr = NULL; cfPtr->nextPtr = NULL; cfPtr->data.eval.path = contextPtr->data.eval.path; Tcl_IncrRefCount(cfPtr->data.eval.path); cfPtr->cmd.str.cmd = NULL; cfPtr->cmd.str.len = 0; Tcl_SetHashValue(Tcl_CreateHashEntry(iPtr->linePBodyPtr, (char *) procPtr, &isNew), cfPtr); } /* * 'contextPtr' is going out of scope; account for the reference that * it's holding to the path name. */ Tcl_DecrRefCount(contextPtr->data.eval.path); contextPtr->data.eval.path = NULL; } TclStackFree(interp, contextPtr); } /* * Optimize for no-op procs: if the body is not precompiled (like a TclPro * procbody), and the argument list is just "args" and the body is empty, * define a compileProc to compile a no-op. * * Notes: * - cannot be done for any argument list without having different * compiled/not-compiled behaviour in the "wrong argument #" case, or * making this code much more complicated. In any case, it doesn't * seem to make a lot of sense to verify the number of arguments we * are about to ignore ... * - could be enhanced to handle also non-empty bodies that contain only * comments; however, parsing the body will slow down the compilation * of all procs whose argument list is just _args_ */ if (objv[3]->typePtr == &tclProcBodyType) { goto done; } procArgs = TclGetString(objv[2]); while (*procArgs == ' ') { procArgs++; } if ((procArgs[0] == 'a') && (strncmp(procArgs, "args", 4) == 0)) { procArgs +=4; while(*procArgs != '\0') { if (*procArgs != ' ') { goto done; } procArgs++; } /* * The argument list is just "args"; check the body */ procBody = TclGetString(objv[3]); while (*procBody != '\0') { if (!isspace(UCHAR(*procBody))) { goto done; } procBody++; } /* * The body is just spaces: link the compileProc */ ((Command *) cmd)->compileProc = TclCompileNoOp; } done: return TCL_OK; }  /* *---------------------------------------------------------------------- * * TclCreateProc -- * * Creates the data associated with a Tcl procedure definition. This * function knows how to handle two types of body objects: strings and * procbody. Strings are the traditional (and common) value for bodies, * procbody are values created by extensions that have loaded a * previously compiled script. * * Results: * Returns TCL_OK on success, along with a pointer to a Tcl procedure * definition in procPtrPtr where the cmdPtr field is not initialised. * This definition should be freed by calling TclProcCleanupProc() when * it is no longer needed. Returns TCL_ERROR if anything goes wrong. * * Side effects: * If anything goes wrong, this function returns an error message in the * interpreter. * *---------------------------------------------------------------------- */ int TclCreateProc( Tcl_Interp *interp, /* Interpreter containing proc. */ Namespace *nsPtr, /* Namespace containing this proc. */ CONST char *procName, /* Unqualified name of this proc. */ Tcl_Obj *argsPtr, /* Description of arguments. */ Tcl_Obj *bodyPtr, /* Command body. */ Proc **procPtrPtr) /* Returns: pointer to proc data. */ { Interp *iPtr = (Interp *) interp; CONST char **argArray = NULL; register Proc *procPtr; int i, length, result, numArgs; CONST char *args, *bytes, *p; register CompiledLocal *localPtr = NULL; Tcl_Obj *defPtr; int precompiled = 0; if (bodyPtr->typePtr == &tclProcBodyType) { /* * Because the body is a TclProProcBody, the actual body is already * compiled, and it is not shared with anyone else, so it's OK not to * unshare it (as a matter of fact, it is bad to unshare it, because * there may be no source code). * * We don't create and initialize a Proc structure for the procedure; * rather, we use what is in the body object. We increment the ref * count of the Proc struct since the command (soon to be created) * will be holding a reference to it. */ procPtr = bodyPtr->internalRep.otherValuePtr; procPtr->iPtr = iPtr; procPtr->refCount++; precompiled = 1; } else { /* * If the procedure's body object is shared because its string value * is identical to, e.g., the body of another procedure, we must * create a private copy for this procedure to use. Such sharing of * procedure bodies is rare but can cause problems. A procedure body * is compiled in a context that includes the number of "slots" * allocated by the compiler for local variables. There is a local * variable slot for each formal parameter (the * "procPtr->numCompiledLocals = numArgs" assignment below). This * means that the same code can not be shared by two procedures that * have a different number of arguments, even if their bodies are * identical. Note that we don't use Tcl_DuplicateObj since we would * not want any bytecode internal representation. */ if (Tcl_IsShared(bodyPtr)) { bytes = TclGetStringFromObj(bodyPtr, &length); bodyPtr = Tcl_NewStringObj(bytes, length); } /* * Create and initialize a Proc structure for the procedure. We * increment the ref count of the procedure's body object since there * will be a reference to it in the Proc structure. */ Tcl_IncrRefCount(bodyPtr); procPtr = (Proc *) ckalloc(sizeof(Proc)); procPtr->iPtr = iPtr; procPtr->refCount = 1; procPtr->bodyPtr = bodyPtr; procPtr->numArgs = 0; /* Actual argument count is set below. */ procPtr->numCompiledLocals = 0; procPtr->firstLocalPtr = NULL; procPtr->lastLocalPtr = NULL; } /* * Break up the argument list into argument specifiers, then process each * argument specifier. If the body is precompiled, processing is limited * to checking that the parsed argument is consistent with the one stored * in the Proc. * * THIS FAILS IF THE ARG LIST OBJECT'S STRING REP CONTAINS NULS. */ args = TclGetStringFromObj(argsPtr, &length); result = Tcl_SplitList(interp, args, &numArgs, &argArray); if (result != TCL_OK) { goto procError; } if (precompiled) { if (numArgs > procPtr->numArgs) { Tcl_SetObjResult(interp, Tcl_ObjPrintf( "procedure \"%s\": arg list contains %d entries, " "precompiled header expects %d", procName, numArgs, procPtr->numArgs)); goto procError; } localPtr = procPtr->firstLocalPtr; } else { procPtr->numArgs = numArgs; procPtr->numCompiledLocals = numArgs; } for (i = 0; i < numArgs; i++) { int fieldCount, nameLength, valueLength; CONST char **fieldValues; /* * Now divide the specifier up into name and default. */ result = Tcl_SplitList(interp, argArray[i], &fieldCount, &fieldValues); if (result != TCL_OK) { goto procError; } if (fieldCount > 2) { ckfree((char *) fieldValues); Tcl_AppendResult(interp, "too many fields in argument specifier \"", argArray[i], "\"", NULL); goto procError; } if ((fieldCount == 0) || (*fieldValues[0] == 0)) { ckfree((char *) fieldValues); Tcl_AppendResult(interp, "argument with no name", NULL); goto procError; } nameLength = strlen(fieldValues[0]); if (fieldCount == 2) { valueLength = strlen(fieldValues[1]); } else { valueLength = 0; } /* * Check that the formal parameter name is a scalar. */ p = fieldValues[0]; while (*p != '\0') { if (*p == '(') { CONST char *q = p; do { q++; } while (*q != '\0'); q--; if (*q == ')') { /* We have an array element. */ Tcl_AppendResult(interp, "formal parameter \"", fieldValues[0], "\" is an array element", NULL); ckfree((char *) fieldValues); goto procError; } } else if ((*p == ':') && (*(p+1) == ':')) { Tcl_AppendResult(interp, "formal parameter \"", fieldValues[0], "\" is not a simple name", NULL); ckfree((char *) fieldValues); goto procError; } p++; } if (precompiled) { /* * Compare the parsed argument with the stored one. Note that the * only flag value that makes sense at this point is VAR_ARGUMENT * (its value was kept the same as pre VarReform to simplify * tbcload's processing of older byetcodes). * * The only other flag vlaue that is important to retrieve from * precompiled procs is VAR_TEMPORARY (also unchanged). It is * needed later when retrieving the variable names. */ if ((localPtr->nameLength != nameLength) || (strcmp(localPtr->name, fieldValues[0])) || (localPtr->frameIndex != i) || !(localPtr->flags & VAR_ARGUMENT) || (localPtr->defValuePtr == NULL && fieldCount == 2) || (localPtr->defValuePtr != NULL && fieldCount != 2)) { Tcl_SetObjResult(interp, Tcl_ObjPrintf( "procedure \"%s\": formal parameter %d is " "inconsistent with precompiled body", procName, i)); ckfree((char *) fieldValues); goto procError; } /* * Compare the default value if any. */ if (localPtr->defValuePtr != NULL) { int tmpLength; char *tmpPtr = TclGetStringFromObj(localPtr->defValuePtr, &tmpLength); if ((valueLength != tmpLength) || strncmp(fieldValues[1], tmpPtr, (size_t) tmpLength)) { Tcl_SetObjResult(interp, Tcl_ObjPrintf( "procedure \"%s\": formal parameter \"%s\" has " "default value inconsistent with precompiled body", procName, fieldValues[0])); ckfree((char *) fieldValues); goto procError; } } if ((i == numArgs - 1) && (localPtr->nameLength == 4) && (localPtr->name[0] == 'a') && (strcmp(localPtr->name, "args") == 0)) { localPtr->flags |= VAR_IS_ARGS; } localPtr = localPtr->nextPtr; } else { /* * Allocate an entry in the runtime procedure frame's array of * local variables for the argument. */ localPtr = (CompiledLocal *) ckalloc((unsigned) (sizeof(CompiledLocal) - sizeof(localPtr->name) + nameLength + 1)); if (procPtr->firstLocalPtr == NULL) { procPtr->firstLocalPtr = procPtr->lastLocalPtr = localPtr; } else { procPtr->lastLocalPtr->nextPtr = localPtr; procPtr->lastLocalPtr = localPtr; } localPtr->nextPtr = NULL; localPtr->nameLength = nameLength; localPtr->frameIndex = i; localPtr->flags = VAR_ARGUMENT; localPtr->resolveInfo = NULL; if (fieldCount == 2) { localPtr->defValuePtr = Tcl_NewStringObj(fieldValues[1], valueLength); Tcl_IncrRefCount(localPtr->defValuePtr); } else { localPtr->defValuePtr = NULL; } strcpy(localPtr->name, fieldValues[0]); if ((i == numArgs - 1) && (localPtr->nameLength == 4) && (localPtr->name[0] == 'a') && (strcmp(localPtr->name, "args") == 0)) { localPtr->flags |= VAR_IS_ARGS; } } ckfree((char *) fieldValues); } *procPtrPtr = procPtr; ckfree((char *) argArray); return TCL_OK; procError: if (precompiled) { procPtr->refCount--; } else { Tcl_DecrRefCount(bodyPtr); while (procPtr->firstLocalPtr != NULL) { localPtr = procPtr->firstLocalPtr; procPtr->firstLocalPtr = localPtr->nextPtr; defPtr = localPtr->defValuePtr; if (defPtr != NULL) { Tcl_DecrRefCount(defPtr); } ckfree((char *) localPtr); } ckfree((char *) procPtr); } if (argArray != NULL) { ckfree((char *) argArray); } return TCL_ERROR; }  /* *---------------------------------------------------------------------- * * TclGetFrame -- * * Given a description of a procedure frame, such as the first argument * to an "uplevel" or "upvar" command, locate the call frame for the * appropriate level of procedure. * * Results: * The return value is -1 if an error occurred in finding the frame (in * this case an error message is left in the interp's result). 1 is * returned if string was either a number or a number preceded by "#" and * it specified a valid frame. 0 is returned if string isn't one of the * two things above (in this case, the lookup acts as if string were * "1"). The variable pointed to by framePtrPtr is filled in with the * address of the desired frame (unless an error occurs, in which case it * isn't modified). * * Side effects: * None. * *---------------------------------------------------------------------- */ int TclGetFrame( Tcl_Interp *interp, /* Interpreter in which to find frame. */ CONST char *name, /* String describing frame. */ CallFrame **framePtrPtr) /* Store pointer to frame here (or NULL if * global frame indicated). */ { register Interp *iPtr = (Interp *) interp; int curLevel, level, result; CallFrame *framePtr; /* * Parse string to figure out which level number to go to. */ result = 1; curLevel = iPtr->varFramePtr->level; if (*name== '#') { if (Tcl_GetInt(interp, name+1, &level) != TCL_OK || level < 0) { goto levelError; } } else if (isdigit(UCHAR(*name))) { /* INTL: digit */ if (Tcl_GetInt(interp, name, &level) != TCL_OK) { goto levelError; } level = curLevel - level; } else { level = curLevel - 1; result = 0; } /* * Figure out which frame to use, and return it to the caller. */ for (framePtr = iPtr->varFramePtr; framePtr != NULL; framePtr = framePtr->callerVarPtr) { if (framePtr->level == level) { break; } } if (framePtr == NULL) { goto levelError; } *framePtrPtr = framePtr; return result; levelError: Tcl_ResetResult(interp); Tcl_AppendResult(interp, "bad level \"", name, "\"", NULL); return -1; }  /* *---------------------------------------------------------------------- * * TclObjGetFrame -- * * Given a description of a procedure frame, such as the first argument * to an "uplevel" or "upvar" command, locate the call frame for the * appropriate level of procedure. * * Results: * The return value is -1 if an error occurred in finding the frame (in * this case an error message is left in the interp's result). 1 is * returned if objPtr was either a number or a number preceded by "#" and * it specified a valid frame. 0 is returned if objPtr isn't one of the * two things above (in this case, the lookup acts as if objPtr were * "1"). The variable pointed to by framePtrPtr is filled in with the * address of the desired frame (unless an error occurs, in which case it * isn't modified). * * Side effects: * None. * *---------------------------------------------------------------------- */ int TclObjGetFrame( Tcl_Interp *interp, /* Interpreter in which to find frame. */ Tcl_Obj *objPtr, /* Object describing frame. */ CallFrame **framePtrPtr) /* Store pointer to frame here (or NULL if * global frame indicated). */ { register Interp *iPtr = (Interp *) interp; int curLevel, level, result; CallFrame *framePtr; CONST char *name = TclGetString(objPtr); /* * Parse object to figure out which level number to go to. */ result = 1; curLevel = iPtr->varFramePtr->level; if (objPtr->typePtr == &levelReferenceType) { if (PTR2INT(objPtr->internalRep.twoPtrValue.ptr1)) { level = curLevel - PTR2INT(objPtr->internalRep.twoPtrValue.ptr2); } else { level = PTR2INT(objPtr->internalRep.twoPtrValue.ptr2); } if (level < 0) { goto levelError; } /* TODO: Consider skipping the typePtr checks */ } else if (objPtr->typePtr == &tclIntType #ifndef NO_WIDE_TYPE || objPtr->typePtr == &tclWideIntType #endif ) { if (TclGetIntFromObj(NULL, objPtr, &level) != TCL_OK || level < 0) { goto levelError; } level = curLevel - level; } else if (*name == '#') { if (Tcl_GetInt(interp, name+1, &level) != TCL_OK || level < 0) { goto levelError; } /* * Cache for future reference. * * TODO: Use the new ptrAndLongRep intrep */ TclFreeIntRep(objPtr); objPtr->typePtr = &levelReferenceType; objPtr->internalRep.twoPtrValue.ptr1 = (void *) 0; objPtr->internalRep.twoPtrValue.ptr2 = INT2PTR(level); } else if (isdigit(UCHAR(*name))) { /* INTL: digit */ if (Tcl_GetInt(interp, name, &level) != TCL_OK) { return -1; } /* * Cache for future reference. * * TODO: Use the new ptrAndLongRep intrep */ TclFreeIntRep(objPtr); objPtr->typePtr = &levelReferenceType; objPtr->internalRep.twoPtrValue.ptr1 = (void *) 1; objPtr->internalRep.twoPtrValue.ptr2 = INT2PTR(level); level = curLevel - level; } else { /* * Don't cache as the object *isn't* a level reference. */ level = curLevel - 1; result = 0; } /* * Figure out which frame to use, and return it to the caller. */ for (framePtr = iPtr->varFramePtr; framePtr != NULL; framePtr = framePtr->callerVarPtr) { if (framePtr->level == level) { break; } } if (framePtr == NULL) { goto levelError; } *framePtrPtr = framePtr; return result; levelError: Tcl_ResetResult(interp); Tcl_AppendResult(interp, "bad level \"", name, "\"", NULL); return -1; }  /* *---------------------------------------------------------------------- * * Tcl_UplevelObjCmd -- * * This object function is invoked to process the "uplevel" Tcl command. * See the user documentation for details on what it does. * * Results: * A standard Tcl object result value. * * Side effects: * See the user documentation. * *---------------------------------------------------------------------- */ /* ARGSUSED */ int Tcl_UplevelObjCmd( ClientData dummy, /* Not used. */ Tcl_Interp *interp, /* Current interpreter. */ int objc, /* Number of arguments. */ Tcl_Obj *CONST objv[]) /* Argument objects. */ { register Interp *iPtr = (Interp *) interp; int result; CallFrame *savedVarFramePtr, *framePtr; if (objc < 2) { uplevelSyntax: Tcl_WrongNumArgs(interp, 1, objv, "?level? command ?arg ...?"); return TCL_ERROR; } /* * Find the level to use for executing the command. */ result = TclObjGetFrame(interp, objv[1], &framePtr); if (result == -1) { return TCL_ERROR; } objc -= (result+1); if (objc == 0) { goto uplevelSyntax; } objv += (result+1); /* * Modify the interpreter state to execute in the given frame. */ savedVarFramePtr = iPtr->varFramePtr; iPtr->varFramePtr = framePtr; /* * Execute the residual arguments as a command. */ if (objc == 1) { result = Tcl_EvalObjEx(interp, objv[0], TCL_EVAL_DIRECT); } else { /* * More than one argument: concatenate them together with spaces * between, then evaluate the result. Tcl_EvalObjEx will delete the * object when it decrements its refcount after eval'ing it. */ Tcl_Obj *objPtr; objPtr = Tcl_ConcatObj(objc, objv); result = Tcl_EvalObjEx(interp, objPtr, TCL_EVAL_DIRECT); } if (result == TCL_ERROR) { Tcl_AppendObjToErrorInfo(interp, Tcl_ObjPrintf( "\n (\"uplevel\" body line %d)", interp->errorLine)); } /* * Restore the variable frame, and return. */ iPtr->varFramePtr = savedVarFramePtr; return result; }  /* *---------------------------------------------------------------------- * * TclFindProc -- * * Given the name of a procedure, return a pointer to the record * describing the procedure. The procedure will be looked up using the * usual rules: first in the current namespace and then in the global * namespace. * * Results: * NULL is returned if the name doesn't correspond to any procedure. * Otherwise, the return value is a pointer to the procedure's record. If * the name is found but refers to an imported command that points to a * "real" procedure defined in another namespace, a pointer to that * "real" procedure's structure is returned. * * Side effects: * None. * *---------------------------------------------------------------------- */ Proc * TclFindProc( Interp *iPtr, /* Interpreter in which to look. */ CONST char *procName) /* Name of desired procedure. */ { Tcl_Command cmd; Tcl_Command origCmd; Command *cmdPtr; cmd = Tcl_FindCommand((Tcl_Interp *) iPtr, procName, NULL, /*flags*/ 0); if (cmd == (Tcl_Command) NULL) { return NULL; } cmdPtr = (Command *) cmd; origCmd = TclGetOriginalCommand(cmd); if (origCmd != NULL) { cmdPtr = (Command *) origCmd; } if (cmdPtr->objProc != TclObjInterpProc) { return NULL; } return (Proc *) cmdPtr->objClientData; }  /* *---------------------------------------------------------------------- * * TclIsProc -- * * Tells whether a command is a Tcl procedure or not. * * Results: * If the given command is actually a Tcl procedure, the return value is * the address of the record describing the procedure. Otherwise the * return value is 0. * * Side effects: * None. * *---------------------------------------------------------------------- */ Proc * TclIsProc( Command *cmdPtr) /* Command to test. */ { Tcl_Command origCmd; origCmd = TclGetOriginalCommand((Tcl_Command) cmdPtr); if (origCmd != NULL) { cmdPtr = (Command *) origCmd; } if (cmdPtr->objProc == TclObjInterpProc) { return (Proc *) cmdPtr->objClientData; } return (Proc *) 0; }  /* *---------------------------------------------------------------------- * * InitArgsAndLocals -- * * This routine is invoked in order to initialize the arguments and other * compiled locals table for a new call frame. * * Results: * A standard Tcl result. * * Side effects: * Allocates memory on the stack for the compiled local variables, the * caller is responsible for freeing them. Initialises all variables. May * invoke various name resolvers in order to determine which variables * are being referenced at runtime. * *---------------------------------------------------------------------- */ static int ProcWrongNumArgs( Tcl_Interp *interp, int skip) { CallFrame *framePtr = ((Interp *)interp)->varFramePtr; register Proc *procPtr = framePtr->procPtr; register Var *defPtr; int localCt = procPtr->numCompiledLocals, numArgs, i; Tcl_Obj **desiredObjs; const char *final = NULL; /* * Build up desired argument list for Tcl_WrongNumArgs */ numArgs = framePtr->procPtr->numArgs; desiredObjs = (Tcl_Obj **) TclStackAlloc(interp, (int) sizeof(Tcl_Obj *) * (numArgs+1)); #ifdef AVOID_HACKS_FOR_ITCL desiredObjs[0] = framePtr->objv[skip-1]; #else desiredObjs[0] = ((framePtr->isProcCallFrame & FRAME_IS_LAMBDA) ? framePtr->objv[skip-1] : Tcl_NewListObj(skip, framePtr->objv)); #endif /* AVOID_HACKS_FOR_ITCL */ Tcl_IncrRefCount(desiredObjs[0]); defPtr = (Var *) (&framePtr->localCachePtr->varName0 + localCt); for (i=1 ; i<=numArgs ; i++, defPtr++) { Tcl_Obj *argObj; Tcl_Obj *namePtr = localName(framePtr, i-1); if (defPtr->value.objPtr != NULL) { TclNewObj(argObj); Tcl_AppendStringsToObj(argObj, "?", TclGetString(namePtr), "?", NULL); } else if (defPtr->flags & VAR_IS_ARGS) { numArgs--; final = "..."; break; } else { argObj = namePtr; Tcl_IncrRefCount(namePtr); } desiredObjs[i] = argObj; } Tcl_ResetResult(interp); Tcl_WrongNumArgs(interp, numArgs+1, desiredObjs, final); for (i=0 ; i<=numArgs ; i++) { Tcl_DecrRefCount(desiredObjs[i]); } TclStackFree(interp, desiredObjs); return TCL_ERROR; }  /* *---------------------------------------------------------------------- * * TclInitCompiledLocals -- * * This routine is invoked in order to initialize the compiled locals * table for a new call frame. * * DEPRECATED: functionality has been inlined elsewhere; this function * remains to insure binary compatibility with Itcl. * * Results: * None. * * Side effects: * May invoke various name resolvers in order to determine which * variables are being referenced at runtime. * *---------------------------------------------------------------------- */ void TclInitCompiledLocals( Tcl_Interp *interp, /* Current interpreter. */ CallFrame *framePtr, /* Call frame to initialize. */ Namespace *nsPtr) /* Pointer to current namespace. */ { Var *varPtr = framePtr->compiledLocals; Tcl_Obj *bodyPtr; ByteCode *codePtr; bodyPtr = framePtr->procPtr->bodyPtr; if (bodyPtr->typePtr != &tclByteCodeType) { Tcl_Panic("body object for proc attached to frame is not a byte code type"); } codePtr = bodyPtr->internalRep.otherValuePtr; if (framePtr->numCompiledLocals) { if (!codePtr->localCachePtr) { InitLocalCache(framePtr->procPtr) ; } framePtr->localCachePtr = codePtr->localCachePtr; framePtr->localCachePtr->refCount++; } InitResolvedLocals(interp, codePtr, varPtr, nsPtr); }  /* *---------------------------------------------------------------------- * * InitResolvedLocals -- * * This routine is invoked in order to initialize the compiled locals * table for a new call frame. * * Results: * None. * * Side effects: * May invoke various name resolvers in order to determine which * variables are being referenced at runtime. * *---------------------------------------------------------------------- */ static void InitResolvedLocals( Tcl_Interp *interp, /* Current interpreter. */ ByteCode *codePtr, Var *varPtr, Namespace *nsPtr) /* Pointer to current namespace. */ { Interp *iPtr = (Interp *) interp; int haveResolvers = (nsPtr->compiledVarResProc || iPtr->resolverPtr); CompiledLocal *firstLocalPtr, *localPtr; int varNum; Tcl_ResolvedVarInfo *resVarInfo; /* * Find the localPtr corresponding to varPtr */ varNum = varPtr - iPtr->framePtr->compiledLocals; localPtr = iPtr->framePtr->procPtr->firstLocalPtr; while (varNum--) { localPtr = localPtr->nextPtr; } if (!(haveResolvers && (codePtr->flags & TCL_BYTECODE_RESOLVE_VARS))) { /* * Initialize the array of local variables stored in the call frame. * Some variables may have special resolution rules. In that case, we * call their "resolver" procs to get our hands on the variable, and * we make the compiled local a link to the real variable. */ doInitResolvedLocals: for (; localPtr != NULL; varPtr++, localPtr = localPtr->nextPtr) { varPtr->flags = 0; varPtr->value.objPtr = NULL; /* * Now invoke the resolvers to determine the exact variables * that should be used. */ resVarInfo = localPtr->resolveInfo; if (resVarInfo && resVarInfo->fetchProc) { Var *resolvedVarPtr = (Var *) (*resVarInfo->fetchProc)(interp, resVarInfo); if (resolvedVarPtr) { if (TclIsVarInHash(resolvedVarPtr)) { VarHashRefCount(resolvedVarPtr)++; } varPtr->flags = VAR_LINK; varPtr->value.linkPtr = resolvedVarPtr; } } } return; } /* * This is the first run after a recompile, or else the resolver epoch * has changed: update the resolver cache. */ firstLocalPtr = localPtr; for (; localPtr != NULL; localPtr = localPtr->nextPtr) { if (localPtr->resolveInfo) { if (localPtr->resolveInfo->deleteProc) { localPtr->resolveInfo->deleteProc(localPtr->resolveInfo); } else { ckfree((char *) localPtr->resolveInfo); } localPtr->resolveInfo = NULL; } localPtr->flags &= ~VAR_RESOLVED; if (haveResolvers && !(localPtr->flags & (VAR_ARGUMENT|VAR_TEMPORARY))) { ResolverScheme *resPtr = iPtr->resolverPtr; Tcl_ResolvedVarInfo *vinfo; int result; if (nsPtr->compiledVarResProc) { result = (*nsPtr->compiledVarResProc)(nsPtr->interp, localPtr->name, localPtr->nameLength, (Tcl_Namespace *) nsPtr, &vinfo); } else { result = TCL_CONTINUE; } while ((result == TCL_CONTINUE) && resPtr) { if (resPtr->compiledVarResProc) { result = (*resPtr->compiledVarResProc)(nsPtr->interp, localPtr->name, localPtr->nameLength, (Tcl_Namespace *) nsPtr, &vinfo); } resPtr = resPtr->nextPtr; } if (result == TCL_OK) { localPtr->resolveInfo = vinfo; localPtr->flags |= VAR_RESOLVED; } } } localPtr = firstLocalPtr; codePtr->flags &= ~TCL_BYTECODE_RESOLVE_VARS; goto doInitResolvedLocals; } void TclFreeLocalCache( Tcl_Interp *interp, LocalCache *localCachePtr) { int i; Tcl_Obj **namePtrPtr = &localCachePtr->varName0; for (i = 0; i < localCachePtr->numVars; i++, namePtrPtr++) { Tcl_Obj *objPtr = *namePtrPtr; /* * Note that this can be called with interp==NULL, on interp * deletion. In that case, the literal table and objects go away * on their own. */ if (objPtr) { if (interp) { TclReleaseLiteral(interp, objPtr); } else { Tcl_DecrRefCount(objPtr); } } } ckfree((char *) localCachePtr); } static void InitLocalCache(Proc *procPtr) { Interp *iPtr = procPtr->iPtr; ByteCode *codePtr = procPtr->bodyPtr->internalRep.otherValuePtr; int localCt = procPtr->numCompiledLocals; int numArgs = procPtr->numArgs, i = 0; Tcl_Obj **namePtr; Var *varPtr; LocalCache *localCachePtr; CompiledLocal *localPtr; int new; /* * Cache the names and initial values of local variables; store the * cache in both the framePtr for this execution and in the codePtr * for future calls. */ localCachePtr = (LocalCache *) ckalloc(sizeof(LocalCache) + (localCt-1)*sizeof(Tcl_Obj *) + numArgs*sizeof(Var)); namePtr = &localCachePtr->varName0; varPtr = (Var *) (namePtr + localCt); localPtr = procPtr->firstLocalPtr; while (localPtr) { if (TclIsVarTemporary(localPtr)) { *namePtr = NULL; } else { *namePtr = TclCreateLiteral(iPtr, localPtr->name, localPtr->nameLength, /* hash */ (unsigned int) -1, &new, /* nsPtr */ NULL, 0, NULL); Tcl_IncrRefCount(*namePtr); } if (i < numArgs) { varPtr->flags = (localPtr->flags & VAR_IS_ARGS); varPtr->value.objPtr = localPtr->defValuePtr; varPtr++; i++; } namePtr++; localPtr=localPtr->nextPtr; } codePtr->localCachePtr = localCachePtr; localCachePtr->refCount = 1; localCachePtr->numVars = localCt; } static int InitArgsAndLocals( register Tcl_Interp *interp,/* Interpreter in which procedure was * invoked. */ Tcl_Obj *procNameObj, /* Procedure name for error reporting. */ int skip) /* Number of initial arguments to be skipped, * i.e., words in the "command name". */ { CallFrame *framePtr = ((Interp *)interp)->varFramePtr; register Proc *procPtr = framePtr->procPtr; ByteCode *codePtr = procPtr->bodyPtr->internalRep.otherValuePtr; register Var *varPtr, *defPtr; int localCt = procPtr->numCompiledLocals, numArgs, argCt, i, imax; Tcl_Obj *const *argObjs; /* * Make sure that the local cache of variable names and initial values has * been initialised properly . */ if (localCt) { if (!codePtr->localCachePtr) { InitLocalCache(procPtr) ; } framePtr->localCachePtr = codePtr->localCachePtr; framePtr->localCachePtr->refCount++; defPtr = (Var *) (&framePtr->localCachePtr->varName0 + localCt); } else { defPtr = NULL; } /* * Create the "compiledLocals" array. Make sure it is large enough to hold * all the procedure's compiled local variables, including its formal * parameters. */ varPtr = (Var*) TclStackAlloc(interp, (int)(localCt*sizeof(Var))); framePtr->compiledLocals = varPtr; framePtr->numCompiledLocals = localCt; /* * Match and assign the call's actual parameters to the procedure's formal * arguments. The formal arguments are described by the first numArgs * entries in both the Proc structure's local variable list and the call * frame's local variable array. */ numArgs = procPtr->numArgs; argCt = framePtr->objc - skip; /* Set it to the number of args to the * procedure. */ argObjs = framePtr->objv + skip; if (numArgs == 0) { if (argCt) { goto incorrectArgs; } else { goto correctArgs; } } imax = ((argCt < numArgs-1) ? argCt : numArgs-1); for (i = 0; i < imax; i++, varPtr++, defPtr++) { /* * "Normal" arguments; last formal is special, depends on it being * 'args'. */ Tcl_Obj *objPtr = argObjs[i]; varPtr->flags = 0; varPtr->value.objPtr = objPtr; Tcl_IncrRefCount(objPtr); /* Local var is a reference. */ } for (; i < numArgs-1; i++, varPtr++, defPtr++) { /* * This loop is entered if argCt < (numArgs-1). Set default values; * last formal is special. */ Tcl_Obj *objPtr = defPtr->value.objPtr; if (objPtr) { varPtr->flags = 0; varPtr->value.objPtr = objPtr; Tcl_IncrRefCount(objPtr); /* Local var reference. */ } else { goto incorrectArgs; } } /* * When we get here, the last formal argument remains to be defined: * defPtr and varPtr point to the last argument to be initialized. */ varPtr->flags = 0; if (defPtr->flags & VAR_IS_ARGS) { Tcl_Obj *listPtr = Tcl_NewListObj(argCt-i, argObjs+i); varPtr->value.objPtr = listPtr; Tcl_IncrRefCount(listPtr); /* Local var is a reference. */ } else if (argCt == numArgs) { Tcl_Obj *objPtr = argObjs[i]; varPtr->value.objPtr = objPtr; Tcl_IncrRefCount(objPtr); /* Local var is a reference. */ } else if ((argCt < numArgs) && (defPtr->value.objPtr != NULL)) { Tcl_Obj *objPtr = defPtr->value.objPtr; varPtr->value.objPtr = objPtr; Tcl_IncrRefCount(objPtr); /* Local var is a reference. */ } else { goto incorrectArgs; } varPtr++; /* * Initialise and resolve the remaining compiledLocals. In the absence of * resolvers, they are undefined local vars: (flags=0, value=NULL). */ correctArgs: if (numArgs < localCt) { if (!framePtr->nsPtr->compiledVarResProc && !((Interp *)interp)->resolverPtr) { memset(varPtr, 0, (localCt - numArgs)*sizeof(Var)); } else { InitResolvedLocals(interp, codePtr, varPtr, framePtr->nsPtr); } } return TCL_OK; incorrectArgs: /* * Initialise all compiled locals to avoid problems at DeleteLocalVars. */ memset(varPtr, 0, ((framePtr->compiledLocals + localCt)-varPtr)*sizeof(Var)); return ProcWrongNumArgs(interp, skip); }  /* *---------------------------------------------------------------------- * * PushProcCallFrame -- * * Compiles a proc body if necessary, then pushes a CallFrame suitable * for executing it. * * Results: * A standard Tcl object result value. * * Side effects: * The proc's body may be recompiled. A CallFrame is pushed, it will have * to be popped by the caller. * *---------------------------------------------------------------------- */ static int PushProcCallFrame( ClientData clientData, /* Record describing procedure to be * interpreted. */ register Tcl_Interp *interp,/* Interpreter in which procedure was * invoked. */ int objc, /* Count of number of arguments to this * procedure. */ Tcl_Obj *CONST objv[], /* Argument value objects. */ int isLambda) /* 1 if this is a call by ApplyObjCmd: it * needs special rules for error msg */ { Proc *procPtr = (Proc *) clientData; Namespace *nsPtr = procPtr->cmdPtr->nsPtr; CallFrame *framePtr, **framePtrPtr; int result; ByteCode *codePtr; /* * If necessary (i.e. if we haven't got a suitable compilation already * cached) compile the procedure's body. The compiler will allocate frame * slots for the procedure's non-argument local variables. Note that * compiling the body might increase procPtr->numCompiledLocals if new * local variables are found while compiling. */ if (procPtr->bodyPtr->typePtr == &tclByteCodeType) { Interp *iPtr = (Interp *) interp; /* * When we've got bytecode, this is the check for validity. That is, * the bytecode must be for the right interpreter (no cross-leaks!), * the code must be from the current epoch (so subcommand compilation * is up-to-date), the namespace must match (so variable handling * is right) and the resolverEpoch must match (so that new shadowed * commands and/or resolver changes are considered). */ codePtr = procPtr->bodyPtr->internalRep.otherValuePtr; if (((Interp *) *codePtr->interpHandle != iPtr) || (codePtr->compileEpoch != iPtr->compileEpoch) || (codePtr->nsPtr != nsPtr) || (codePtr->nsEpoch != nsPtr->resolverEpoch)) { goto doCompilation; } } else { doCompilation: result = ProcCompileProc(interp, procPtr, procPtr->bodyPtr, nsPtr, (isLambda ? "body of lambda term" : "body of proc"), TclGetString(objv[isLambda]), &procPtr); if (result != TCL_OK) { return result; } } /* * Set up and push a new call frame for the new procedure invocation. * This call frame will execute in the proc's namespace, which might be * different than the current namespace. The proc's namespace is that of * its command, which can change if the command is renamed from one * namespace to another. */ framePtrPtr = &framePtr; result = TclPushStackFrame(interp, (Tcl_CallFrame **) framePtrPtr, (Tcl_Namespace *) nsPtr, (isLambda? (FRAME_IS_PROC|FRAME_IS_LAMBDA) : FRAME_IS_PROC)); if (result != TCL_OK) { return result; } framePtr->objc = objc; framePtr->objv = objv; framePtr->procPtr = procPtr; return TCL_OK; }  /* *---------------------------------------------------------------------- * * TclObjInterpProc -- * * When a Tcl procedure gets invoked during bytecode evaluation, this * object-based routine gets invoked to interpret the procedure. * * Results: * A standard Tcl object result value. * * Side effects: * Depends on the commands in the procedure. * *---------------------------------------------------------------------- */ int TclObjInterpProc( ClientData clientData, /* Record describing procedure to be * interpreted. */ register Tcl_Interp *interp,/* Interpreter in which procedure was * invoked. */ int objc, /* Count of number of arguments to this * procedure. */ Tcl_Obj *CONST objv[]) /* Argument value objects. */ { int result; result = PushProcCallFrame(clientData, interp, objc, objv, /*isLambda*/ 0); if (result == TCL_OK) { return TclObjInterpProcCore(interp, objv[0], 1, &MakeProcError); } else { return TCL_ERROR; } }  /* *---------------------------------------------------------------------- * * TclObjInterpProcCore -- * * When a Tcl procedure, lambda term or anything else that works like a * procedure gets invoked during bytecode evaluation, this object-based * routine gets invoked to interpret the body. * * Results: * A standard Tcl object result value. * * Side effects: * Nearly anything; depends on the commands in the procedure body. * *---------------------------------------------------------------------- */ int TclObjInterpProcCore( register Tcl_Interp *interp,/* Interpreter in which procedure was * invoked. */ Tcl_Obj *procNameObj, /* Procedure name for error reporting. */ int skip, /* Number of initial arguments to be skipped, * i.e., words in the "command name". */ ProcErrorProc errorProc) /* How to convert results from the script into * results of the overall procedure. */ { Interp *iPtr = (Interp *) interp; register Proc *procPtr = iPtr->varFramePtr->procPtr; int result; CallFrame *freePtr; result = InitArgsAndLocals(interp, procNameObj, skip); if (result != TCL_OK) { goto procDone; } #if defined(TCL_COMPILE_DEBUG) if (tclTraceExec >= 1) { register CallFrame *framePtr = iPtr->varFramePtr; register int i; if (framePtr->isProcCallFrame & FRAME_IS_LAMBDA) { fprintf(stdout, "Calling lambda "); } else { fprintf(stdout, "Calling proc "); } for (i = 0; i < framePtr->objc; i++) { TclPrintObject(stdout, framePtr->objv[i], 15); fprintf(stdout, " "); } fprintf(stdout, "\n"); fflush(stdout); } #endif /*TCL_COMPILE_DEBUG*/ if (TCL_DTRACE_PROC_ARGS_ENABLED()) { char *a[10]; int i = 0; int l = iPtr->varFramePtr->isProcCallFrame & FRAME_IS_LAMBDA ? 1 : 0; while (i < 10) { a[i] = (l < iPtr->varFramePtr->objc ? TclGetString(iPtr->varFramePtr->objv[l]) : NULL); i++; l++; } TCL_DTRACE_PROC_ARGS(a[0], a[1], a[2], a[3], a[4], a[5], a[6], a[7], a[8], a[9]); } if (TCL_DTRACE_PROC_INFO_ENABLED() && iPtr->cmdFramePtr) { Tcl_Obj *info = TclInfoFrame(interp, iPtr->cmdFramePtr); char *a[4]; int i[2]; TclDTraceInfo(info, a, i); TCL_DTRACE_PROC_INFO(a[0], a[1], a[2], a[3], i[0], i[1]); TclDecrRefCount(info); } /* * Invoke the commands in the procedure's body. */ procPtr->refCount++; iPtr->numLevels++; if (TclInterpReady(interp) == TCL_ERROR) { result = TCL_ERROR; } else { register ByteCode *codePtr = procPtr->bodyPtr->internalRep.otherValuePtr; codePtr->refCount++; if (TCL_DTRACE_PROC_ENTRY_ENABLED()) { int l; l = iPtr->varFramePtr->isProcCallFrame & FRAME_IS_LAMBDA ? 2 : 1; TCL_DTRACE_PROC_ENTRY(TclGetString(procNameObj), iPtr->varFramePtr->objc - l, (Tcl_Obj **)(iPtr->varFramePtr->objv + l)); } result = TclExecuteByteCode(interp, codePtr); if (TCL_DTRACE_PROC_RETURN_ENABLED()) { TCL_DTRACE_PROC_RETURN(TclGetString(procNameObj), result); } codePtr->refCount--; if (codePtr->refCount <= 0) { TclCleanupByteCode(codePtr); } } iPtr->numLevels--; procPtr->refCount--; if (procPtr->refCount <= 0) { TclProcCleanupProc(procPtr); } /* * Process the result code. */ switch (result) { case TCL_RETURN: /* * If it is a 'return', do the TIP#90 processing now. */ result = TclUpdateReturnInfo((Interp *) interp); break; case TCL_CONTINUE: case TCL_BREAK: /* * It's an error to get to this point from a 'break' or 'continue', so * transform to an error now. */ Tcl_ResetResult(interp); Tcl_AppendResult(interp, "invoked \"", ((result == TCL_BREAK) ? "break" : "continue"), "\" outside of a loop", NULL); result = TCL_ERROR; /* * Fall through to the TCL_ERROR handling code. */ case TCL_ERROR: /* * Now it _must_ be an error, so we need to log it as such. This means * filling out the error trace. Luckily, we just hand this off to the * function handed to us as an argument. */ (*errorProc)(interp, procNameObj); default: /* * Process other results (OK and non-standard) by doing nothing * special, skipping directly to the code afterwards that cleans up * associated memory. * * Non-standard results are processed by passing them through quickly. * This means they all work as exceptions, unwinding the stack quickly * and neatly. Who knows how well they are handled by third-party code * though... */ (void) 0; /* do nothing */ } if (TCL_DTRACE_PROC_RESULT_ENABLED()) { Tcl_Obj *r; r = Tcl_GetObjResult(interp); TCL_DTRACE_PROC_RESULT(TclGetString(procNameObj), result, TclGetString(r), r); } procDone: /* * Free the stack-allocated compiled locals and CallFrame. It is important * to pop the call frame without freeing it first: the compiledLocals * cannot be freed before the frame is popped, as the local variables must * be deleted. But the compiledLocals must be freed first, as they were * allocated later on the stack. */ freePtr = iPtr->framePtr; Tcl_PopCallFrame(interp); /* Pop but do not free. */ TclStackFree(interp, freePtr->compiledLocals); /* Free compiledLocals. */ TclStackFree(interp, freePtr); /* Free CallFrame. */ return result; }  /* *---------------------------------------------------------------------- * * TclProcCompileProc -- * * Called just before a procedure is executed to compile the body to byte * codes. If the type of the body is not "byte code" or if the compile * conditions have changed (namespace context, epoch counters, etc.) then * the body is recompiled. Otherwise, this function does nothing. * * Results: * None. * * Side effects: * May change the internal representation of the body object to compiled * code. * *---------------------------------------------------------------------- */ int TclProcCompileProc( Tcl_Interp *interp, /* Interpreter containing procedure. */ Proc *procPtr, /* Data associated with procedure. */ Tcl_Obj *bodyPtr, /* Body of proc. (Usually procPtr->bodyPtr, * but could be any code fragment compiled in * the context of this procedure.) */ Namespace *nsPtr, /* Namespace containing procedure. */ CONST char *description, /* string describing this body of code. */ CONST char *procName) /* Name of this procedure. */ { return ProcCompileProc(interp, procPtr, bodyPtr, nsPtr, description, procName, NULL); } static int ProcCompileProc( Tcl_Interp *interp, /* Interpreter containing procedure. */ Proc *procPtr, /* Data associated with procedure. */ Tcl_Obj *bodyPtr, /* Body of proc. (Usually procPtr->bodyPtr, * but could be any code fragment compiled in * the context of this procedure.) */ Namespace *nsPtr, /* Namespace containing procedure. */ CONST char *description, /* string describing this body of code. */ CONST char *procName, /* Name of this procedure. */ Proc **procPtrPtr) /* Points to storage where a replacement * (Proc *) value may be written. */ { Interp *iPtr = (Interp *) interp; int i; Tcl_CallFrame *framePtr; Proc *saveProcPtr; ByteCode *codePtr = bodyPtr->internalRep.otherValuePtr; CompiledLocal *localPtr; /* * If necessary, compile the procedure's body. The compiler will allocate * frame slots for the procedure's non-argument local variables. If the * ByteCode already exists, make sure it hasn't been invalidated by * someone redefining a core command (this might make the compiled code * wrong). Also, if the code was compiled in/for a different interpreter, * we recompile it. Note that compiling the body might increase * procPtr->numCompiledLocals if new local variables are found while * compiling. * * Precompiled procedure bodies, however, are immutable and therefore they * are not recompiled, even if things have changed. */ if (bodyPtr->typePtr == &tclByteCodeType) { if (((Interp *) *codePtr->interpHandle == iPtr) && (codePtr->compileEpoch == iPtr->compileEpoch) && (codePtr->nsPtr == nsPtr) && (codePtr->nsEpoch == nsPtr->resolverEpoch)) { return TCL_OK; } else { if (codePtr->flags & TCL_BYTECODE_PRECOMPILED) { if ((Interp *) *codePtr->interpHandle != iPtr) { Tcl_AppendResult(interp, "a precompiled script jumped interps", NULL); return TCL_ERROR; } codePtr->compileEpoch = iPtr->compileEpoch; codePtr->nsPtr = nsPtr; } else { bodyPtr->typePtr->freeIntRepProc(bodyPtr); bodyPtr->typePtr = NULL; } } } if (bodyPtr->typePtr != &tclByteCodeType) { Tcl_HashEntry *hePtr; #ifdef TCL_COMPILE_DEBUG if (tclTraceCompile >= 1) { /* * Display a line summarizing the top level command we are about * to compile. */ Tcl_Obj *message; TclNewLiteralStringObj(message, "Compiling "); Tcl_IncrRefCount(message); Tcl_AppendStringsToObj(message, description, " \"", NULL); Tcl_AppendLimitedToObj(message, procName, -1, 50, NULL); fprintf(stdout, "%s\"\n", TclGetString(message)); Tcl_DecrRefCount(message); } #endif /* * Plug the current procPtr into the interpreter and coerce the code * body to byte codes. The interpreter needs to know which proc it's * compiling so that it can access its list of compiled locals. * * TRICKY NOTE: Be careful to push a call frame with the proper * namespace context, so that the byte codes are compiled in the * appropriate class context. */ saveProcPtr = iPtr->compiledProcPtr; if (procPtrPtr != NULL && procPtr->refCount > 1) { Tcl_Command token; Tcl_CmdInfo info; Proc *newProc = (Proc *) ckalloc(sizeof(Proc)); newProc->iPtr = procPtr->iPtr; newProc->refCount = 1; newProc->cmdPtr = procPtr->cmdPtr; token = (Tcl_Command) newProc->cmdPtr; newProc->bodyPtr = Tcl_DuplicateObj(bodyPtr); bodyPtr = newProc->bodyPtr; Tcl_IncrRefCount(bodyPtr); newProc->numArgs = procPtr->numArgs; newProc->numCompiledLocals = newProc->numArgs; newProc->firstLocalPtr = NULL; newProc->lastLocalPtr = NULL; localPtr = procPtr->firstLocalPtr; for (i=0; i<newProc->numArgs; i++, localPtr=localPtr->nextPtr) { CompiledLocal *copy = (CompiledLocal *) ckalloc((unsigned) (sizeof(CompiledLocal) - sizeof(localPtr->name) + localPtr->nameLength + 1)); if (newProc->firstLocalPtr == NULL) { newProc->firstLocalPtr = newProc->lastLocalPtr = copy; } else { newProc->lastLocalPtr->nextPtr = copy; newProc->lastLocalPtr = copy; } copy->nextPtr = NULL; copy->nameLength = localPtr->nameLength; copy->frameIndex = localPtr->frameIndex; copy->flags = localPtr->flags; copy->defValuePtr = localPtr->defValuePtr; if (copy->defValuePtr) { Tcl_IncrRefCount(copy->defValuePtr); } copy->resolveInfo = localPtr->resolveInfo; strcpy(copy->name, localPtr->name); } /* * Reset the ClientData */ Tcl_GetCommandInfoFromToken(token, &info); if (info.objClientData == (ClientData) procPtr) { info.objClientData = (ClientData) newProc; } if (info.clientData == (ClientData) procPtr) { info.clientData = (ClientData) newProc; } if (info.deleteData == (ClientData) procPtr) { info.deleteData = (ClientData) newProc; } Tcl_SetCommandInfoFromToken(token, &info); procPtr->refCount--; *procPtrPtr = procPtr = newProc; } iPtr->compiledProcPtr = procPtr; (void) TclPushStackFrame(interp, &framePtr, (Tcl_Namespace *) nsPtr, /* isProcCallFrame */ 0); /* * TIP #280: We get the invoking context from the cmdFrame which * was saved by 'Tcl_ProcObjCmd' (using linePBodyPtr). */ hePtr = Tcl_FindHashEntry(iPtr->linePBodyPtr, (char *) procPtr); /* * Constructed saved frame has body as word 0. See Tcl_ProcObjCmd. */ iPtr->invokeWord = 0; iPtr->invokeCmdFramePtr = (hePtr ? (CmdFrame *) Tcl_GetHashValue(hePtr) : NULL); (void) tclByteCodeType.setFromAnyProc(interp, bodyPtr); iPtr->invokeCmdFramePtr = NULL; TclPopStackFrame(interp); iPtr->compiledProcPtr = saveProcPtr; } else if (codePtr->nsEpoch != nsPtr->resolverEpoch) { /* * The resolver epoch has changed, but we only need to invalidate the * resolver cache. */ codePtr->nsEpoch = nsPtr->resolverEpoch; codePtr->flags |= TCL_BYTECODE_RESOLVE_VARS; } return TCL_OK; }  /* *---------------------------------------------------------------------- * * MakeProcError -- * * Function called by TclObjInterpProc to create the stack information * upon an error from a procedure. * * Results: * The interpreter's error info trace is set to a value that supplements * the error code. * * Side effects: * none. * *---------------------------------------------------------------------- */ static void MakeProcError( Tcl_Interp *interp, /* The interpreter in which the procedure was * called. */ Tcl_Obj *procNameObj) /* Name of the procedure. Used for error * messages and trace information. */ { int overflow, limit = 60, nameLen; const char *procName = Tcl_GetStringFromObj(procNameObj, &nameLen); overflow = (nameLen > limit); Tcl_AppendObjToErrorInfo(interp, Tcl_ObjPrintf( "\n (procedure \"%.*s%s\" line %d)", (overflow ? limit : nameLen), procName, (overflow ? "..." : ""), interp->errorLine)); }  /* *---------------------------------------------------------------------- * * TclProcDeleteProc -- * * This function is invoked just before a command procedure is removed * from an interpreter. Its job is to release all the resources allocated * to the procedure. * * Results: * None. * * Side effects: * Memory gets freed, unless the procedure is actively being executed. * In this case the cleanup is delayed until the last call to the current * procedure completes. * *---------------------------------------------------------------------- */ void TclProcDeleteProc( ClientData clientData) /* Procedure to be deleted. */ { Proc *procPtr = (Proc *) clientData; procPtr->refCount--; if (procPtr->refCount <= 0) { TclProcCleanupProc(procPtr); } }  /* *---------------------------------------------------------------------- * * TclProcCleanupProc -- * * This function does all the real work of freeing up a Proc structure. * It's called only when the structure's reference count becomes zero. * * Results: * None. * * Side effects: * Memory gets freed. * *---------------------------------------------------------------------- */ void TclProcCleanupProc( register Proc *procPtr) /* Procedure to be deleted. */ { register CompiledLocal *localPtr; Tcl_Obj *bodyPtr = procPtr->bodyPtr; Tcl_Obj *defPtr; Tcl_ResolvedVarInfo *resVarInfo; Tcl_HashEntry *hePtr = NULL; CmdFrame *cfPtr = NULL; Interp *iPtr = procPtr->iPtr; if (bodyPtr != NULL) { Tcl_DecrRefCount(bodyPtr); } for (localPtr = procPtr->firstLocalPtr; localPtr != NULL; ) { CompiledLocal *nextPtr = localPtr->nextPtr; resVarInfo = localPtr->resolveInfo; if (resVarInfo) { if (resVarInfo->deleteProc) { (*resVarInfo->deleteProc)(resVarInfo); } else { ckfree((char *) resVarInfo); } } if (localPtr->defValuePtr != NULL) { defPtr = localPtr->defValuePtr; Tcl_DecrRefCount(defPtr); } ckfree((char *) localPtr); localPtr = nextPtr; } ckfree((char *) procPtr); /* * TIP #280: Release the location data associated with this Proc * structure, if any. The interpreter may not exist (For example for * procbody structurues created by tbcload. */ if (!iPtr) { return; } hePtr = Tcl_FindHashEntry(iPtr->linePBodyPtr, (char *) procPtr); if (!hePtr) { return; } cfPtr = (CmdFrame *) Tcl_GetHashValue(hePtr); if (cfPtr->type == TCL_LOCATION_SOURCE) { Tcl_DecrRefCount(cfPtr->data.eval.path); cfPtr->data.eval.path = NULL; } ckfree((char *) cfPtr->line); cfPtr->line = NULL; ckfree((char *) cfPtr); Tcl_DeleteHashEntry(hePtr); }  /* *---------------------------------------------------------------------- * * TclUpdateReturnInfo -- * * This function is called when procedures return, and at other points * where the TCL_RETURN code is used. It examines the returnLevel and * returnCode to determine the real return status. * * Results: * The return value is the true completion code to use for the procedure * or script, instead of TCL_RETURN. * * Side effects: * None. * *---------------------------------------------------------------------- */ int TclUpdateReturnInfo( Interp *iPtr) /* Interpreter for which TCL_RETURN exception * is being processed. */ { int code = TCL_RETURN; iPtr->returnLevel--; if (iPtr->returnLevel < 0) { Tcl_Panic("TclUpdateReturnInfo: negative return level"); } if (iPtr->returnLevel == 0) { /* * Now we've reached the level to return the requested -code. */ code = iPtr->returnCode; if (code == TCL_ERROR) { iPtr->flags |= ERR_LEGACY_COPY; } } return code; }  /* *---------------------------------------------------------------------- * * TclGetObjInterpProc -- * * Returns a pointer to the TclObjInterpProc function; this is different * from the value obtained from the TclObjInterpProc reference on systems * like Windows where import and export versions of a function exported * by a DLL exist. * * Results: * Returns the internal address of the TclObjInterpProc function. * * Side effects: * None. * *---------------------------------------------------------------------- */ TclObjCmdProcType TclGetObjInterpProc(void) { return (TclObjCmdProcType) TclObjInterpProc; }  /* *---------------------------------------------------------------------- * * TclNewProcBodyObj -- * * Creates a new object, of type "procbody", whose internal * representation is the given Proc struct. The newly created object's * reference count is 0. * * Results: * Returns a pointer to a newly allocated Tcl_Obj, NULL on error. * * Side effects: * The reference count in the ByteCode attached to the Proc is bumped up * by one, since the internal rep stores a pointer to it. * *---------------------------------------------------------------------- */ Tcl_Obj * TclNewProcBodyObj( Proc *procPtr) /* the Proc struct to store as the internal * representation. */ { Tcl_Obj *objPtr; if (!procPtr) { return NULL; } TclNewObj(objPtr); if (objPtr) { objPtr->typePtr = &tclProcBodyType; objPtr->internalRep.otherValuePtr = procPtr; procPtr->refCount++; } return objPtr; }  /* *---------------------------------------------------------------------- * * ProcBodyDup -- * * Tcl_ObjType's Dup function for the proc body object. Bumps the * reference count on the Proc stored in the internal representation. * * Results: * None. * * Side effects: * Sets up the object in dupPtr to be a duplicate of the one in srcPtr. * *---------------------------------------------------------------------- */ static void ProcBodyDup( Tcl_Obj *srcPtr, /* Object to copy. */ Tcl_Obj *dupPtr) /* Target object for the duplication. */ { Proc *procPtr = srcPtr->internalRep.otherValuePtr; dupPtr->typePtr = &tclProcBodyType; dupPtr->internalRep.otherValuePtr = procPtr; procPtr->refCount++; }  /* *---------------------------------------------------------------------- * * ProcBodyFree -- * * Tcl_ObjType's Free function for the proc body object. The reference * count on its Proc struct is decreased by 1; if the count reaches 0, * the proc is freed. * * Results: * None. * * Side effects: * If the reference count on the Proc struct reaches 0, the struct is * freed. * *---------------------------------------------------------------------- */ static void ProcBodyFree( Tcl_Obj *objPtr) /* The object to clean up. */ { Proc *procPtr = objPtr->internalRep.otherValuePtr; procPtr->refCount--; if (procPtr->refCount <= 0) { TclProcCleanupProc(procPtr); } }  /* *---------------------------------------------------------------------- * * DupLambdaInternalRep, FreeLambdaInternalRep, SetLambdaFromAny -- * * How to manage the internal representations of lambda term objects. * Syntactically they look like a two- or three-element list, where the * first element is the formal arguments, the second is the the body, and * the (optional) third is the namespace to execute the lambda term * within (the global namespace is assumed if it is absent). * *---------------------------------------------------------------------- */ static void DupLambdaInternalRep( Tcl_Obj *srcPtr, /* Object with internal rep to copy. */ register Tcl_Obj *copyPtr) /* Object with internal rep to set. */ { Proc *procPtr = srcPtr->internalRep.twoPtrValue.ptr1; Tcl_Obj *nsObjPtr = srcPtr->internalRep.twoPtrValue.ptr2; copyPtr->internalRep.twoPtrValue.ptr1 = procPtr; copyPtr->internalRep.twoPtrValue.ptr2 = nsObjPtr; procPtr->refCount++; Tcl_IncrRefCount(nsObjPtr); copyPtr->typePtr = &lambdaType; } static void FreeLambdaInternalRep( register Tcl_Obj *objPtr) /* CmdName object with internal representation * to free. */ { Proc *procPtr = objPtr->internalRep.twoPtrValue.ptr1; Tcl_Obj *nsObjPtr = objPtr->internalRep.twoPtrValue.ptr2; procPtr->refCount--; if (procPtr->refCount == 0) { TclProcCleanupProc(procPtr); } TclDecrRefCount(nsObjPtr); } static int SetLambdaFromAny( Tcl_Interp *interp, /* Used for error reporting if not NULL. */ register Tcl_Obj *objPtr) /* The object to convert. */ { Interp *iPtr = (Interp *) interp; char *name; Tcl_Obj *argsPtr, *bodyPtr, *nsObjPtr, **objv, *errPtr; int objc, result; Proc *procPtr; /* * Convert objPtr to list type first; if it cannot be converted, or if its * length is not 2, then it cannot be converted to lambdaType. */ result = TclListObjGetElements(interp, objPtr, &objc, &objv); if ((result != TCL_OK) || ((objc != 2) && (objc != 3))) { TclNewLiteralStringObj(errPtr, "can't interpret \""); Tcl_AppendObjToObj(errPtr, objPtr); Tcl_AppendToObj(errPtr, "\" as a lambda expression", -1); Tcl_SetObjResult(interp, errPtr); return TCL_ERROR; } argsPtr = objv[0]; bodyPtr = objv[1]; /* * Create and initialize the Proc struct. The cmdPtr field is set to NULL * to signal that this is an anonymous function. */ name = TclGetString(objPtr); if (TclCreateProc(interp, /*ignored nsPtr*/ NULL, name, argsPtr, bodyPtr, &procPtr) != TCL_OK) { Tcl_AppendObjToErrorInfo(interp, Tcl_ObjPrintf( "\n (parsing lambda expression \"%s\")", name)); return TCL_ERROR; } /* * CAREFUL: TclCreateProc returns refCount==1! [Bug 1578454] * procPtr->refCount = 1; */ procPtr->cmdPtr = NULL; /* * TIP #280: Remember the line the apply body is starting on. In a Byte * code context we ask the engine to provide us with the necessary * information. This is for the initialization of the byte code compiler * when the body is used for the first time. * * NOTE: The body is the second word in the 'objPtr'. Its location, * accessible through 'context.line[1]' (see below) is therefore only the * first approximation of the actual line the body is on. We have to use * the string rep of the 'objPtr' to determine the exact line. This is * available already through 'name'. Use 'TclListLines', see 'switch' * (tclCmdMZ.c). * * This code is nearly identical to the #280 code in Tcl_ProcObjCmd, see * this file. The differences are the different index of the body in the * line array of the context, and the special processing mentioned in the * previous paragraph to track into the list. Find a way to factor the * common elements into a single function. */ if (iPtr->cmdFramePtr) { CmdFrame *contextPtr; contextPtr = (CmdFrame *) TclStackAlloc(interp, sizeof(CmdFrame)); *contextPtr = *iPtr->cmdFramePtr; if (contextPtr->type == TCL_LOCATION_BC) { /* * Retrieve the source context from the bytecode. This call * accounts for the reference to the source file, if any, held in * 'context.data.eval.path'. */ TclGetSrcInfoForPc(contextPtr); } else if (contextPtr->type == TCL_LOCATION_SOURCE) { /* * We created a new reference to the source file path name when we * created 'context' above. Account for the reference. */ Tcl_IncrRefCount(contextPtr->data.eval.path); } if (contextPtr->type == TCL_LOCATION_SOURCE) { /* * We can record source location within a lambda only if the body * was not created by substitution. */ if (contextPtr->line && (contextPtr->nline >= 2) && (contextPtr->line[1] >= 0)) { int isNew, buf[2]; CmdFrame *cfPtr = (CmdFrame *) ckalloc(sizeof(CmdFrame)); /* * Move from approximation (line of list cmd word) to actual * location (line of 2nd list element). */ TclListLines(name, contextPtr->line[1], 2, buf); cfPtr->level = -1; cfPtr->type = contextPtr->type; cfPtr->line = (int *) ckalloc(sizeof(int)); cfPtr->line[0] = buf[1]; cfPtr->nline = 1; cfPtr->framePtr = NULL; cfPtr->nextPtr = NULL; cfPtr->data.eval.path = contextPtr->data.eval.path; Tcl_IncrRefCount(cfPtr->data.eval.path); cfPtr->cmd.str.cmd = NULL; cfPtr->cmd.str.len = 0; Tcl_SetHashValue(Tcl_CreateHashEntry(iPtr->linePBodyPtr, (char *) procPtr, &isNew), cfPtr); } /* * 'contextPtr' is going out of scope. Release the reference that * it's holding to the source file path */ Tcl_DecrRefCount(contextPtr->data.eval.path); } TclStackFree(interp, contextPtr); } /* * Set the namespace for this lambda: given by objv[2] understood as a * global reference, or else global per default. */ if (objc == 2) { TclNewLiteralStringObj(nsObjPtr, "::"); } else { char *nsName = TclGetString(objv[2]); if ((*nsName != ':') || (*(nsName+1) != ':')) { TclNewLiteralStringObj(nsObjPtr, "::"); Tcl_AppendObjToObj(nsObjPtr, objv[2]); } else { nsObjPtr = objv[2]; } } Tcl_IncrRefCount(nsObjPtr); /* * Free the list internalrep of objPtr - this will free argsPtr, but * bodyPtr retains a reference from the Proc structure. Then finish the * conversion to lambdaType. */ objPtr->typePtr->freeIntRepProc(objPtr); objPtr->internalRep.twoPtrValue.ptr1 = procPtr; objPtr->internalRep.twoPtrValue.ptr2 = nsObjPtr; objPtr->typePtr = &lambdaType; return TCL_OK; }  /* *---------------------------------------------------------------------- * * Tcl_ApplyObjCmd -- * * This object-based function is invoked to process the "apply" Tcl * command. See the user documentation for details on what it does. * * Results: * A standard Tcl object result value. * * Side effects: * Depends on the content of the lambda term (i.e., objv[1]). * *---------------------------------------------------------------------- */ int Tcl_ApplyObjCmd( ClientData dummy, /* Not used. */ Tcl_Interp *interp, /* Current interpreter. */ int objc, /* Number of arguments. */ Tcl_Obj *CONST objv[]) /* Argument objects. */ { Interp *iPtr = (Interp *) interp; Proc *procPtr = NULL; Tcl_Obj *lambdaPtr, *nsObjPtr; int result, isRootEnsemble; Command cmd; Tcl_Namespace *nsPtr; ExtraFrameInfo efi; if (objc < 2) { Tcl_WrongNumArgs(interp, 1, objv, "lambdaExpr ?arg1 arg2 ...?"); return TCL_ERROR; } /* * Set lambdaPtr, convert it to lambdaType in the current interp if * necessary. */ lambdaPtr = objv[1]; if (lambdaPtr->typePtr == &lambdaType) { procPtr = lambdaPtr->internalRep.twoPtrValue.ptr1; } #define JOE_EXTENSION 0 #if JOE_EXTENSION else { /* * Joe English's suggestion to allow cmdNames to function as lambdas. * Also requires making tclCmdNameType non-static in tclObj.c */ Tcl_Obj *elemPtr; int numElem; if ((lambdaPtr->typePtr == &tclCmdNameType) || (TclListObjGetElements(interp, lambdaPtr, &numElem, &elemPtr) == TCL_OK && numElem == 1)) { return Tcl_EvalObjv(interp, objc-1, objv+1, 0); } } #endif if ((procPtr == NULL) || (procPtr->iPtr != iPtr)) { result = SetLambdaFromAny(interp, lambdaPtr); if (result != TCL_OK) { return result; } procPtr = lambdaPtr->internalRep.twoPtrValue.ptr1; } memset(&cmd, 0, sizeof(Command)); procPtr->cmdPtr = &cmd; /* * TIP#280 (semi-)HACK! * * Using cmd.clientData to tell [info frame] how to render the * 'lambdaPtr'. The InfoFrameCmd will detect this case by testing cmd.hPtr * for NULL. This condition holds here because of the 'memset' above, and * nowhere else (in the core). Regular commands always have a valid * 'hPtr', and lambda's never. */ efi.length = 1; efi.fields[0].name = "lambda"; efi.fields[0].proc = NULL; efi.fields[0].clientData = lambdaPtr; cmd.clientData = &efi; /* * Find the namespace where this lambda should run, and push a call frame * for that namespace. Note that TclObjInterpProc() will pop it. */ nsObjPtr = lambdaPtr->internalRep.twoPtrValue.ptr2; result = TclGetNamespaceFromObj(interp, nsObjPtr, &nsPtr); if (result != TCL_OK) { return result; } cmd.nsPtr = (Namespace *) nsPtr; isRootEnsemble = (iPtr->ensembleRewrite.sourceObjs == NULL); if (isRootEnsemble) { iPtr->ensembleRewrite.sourceObjs = objv; iPtr->ensembleRewrite.numRemovedObjs = 1; iPtr->ensembleRewrite.numInsertedObjs = 0; } else { iPtr->ensembleRewrite.numInsertedObjs -= 1; } result = PushProcCallFrame((ClientData) procPtr, interp, objc, objv, 1); if (result == TCL_OK) { result = TclObjInterpProcCore(interp, objv[1], 2, &MakeLambdaError); } if (isRootEnsemble) { iPtr->ensembleRewrite.sourceObjs = NULL; iPtr->ensembleRewrite.numRemovedObjs = 0; iPtr->ensembleRewrite.numInsertedObjs = 0; } return result; }  /* *---------------------------------------------------------------------- * * MakeLambdaError -- * * Function called by TclObjInterpProc to create the stack information * upon an error from a lambda term. * * Results: * The interpreter's error info trace is set to a value that supplements * the error code. * * Side effects: * none. * *---------------------------------------------------------------------- */ static void MakeLambdaError( Tcl_Interp *interp, /* The interpreter in which the procedure was * called. */ Tcl_Obj *procNameObj) /* Name of the procedure. Used for error * messages and trace information. */ { int overflow, limit = 60, nameLen; const char *procName = Tcl_GetStringFromObj(procNameObj, &nameLen); overflow = (nameLen > limit); Tcl_AppendObjToErrorInfo(interp, Tcl_ObjPrintf( "\n (lambda term \"%.*s%s\" line %d)", (overflow ? limit : nameLen), procName, (overflow ? "..." : ""), interp->errorLine)); }   /* *---------------------------------------------------------------------- * * Tcl_DisassembleObjCmd -- * * Implementation of the "::tcl::unsupported::disassemble" command. This * command is not documented, but will disassemble procedures, lambda * terms and general scripts. Note that will compile terms if necessary * in order to disassemble them. * *---------------------------------------------------------------------- */ int Tcl_DisassembleObjCmd( ClientData dummy, /* Not used. */ Tcl_Interp *interp, /* Current interpreter. */ int objc, /* Number of arguments. */ Tcl_Obj *CONST objv[]) /* Argument objects. */ { static const char *types[] = { "lambda", "proc", "script", NULL }; enum Types { DISAS_LAMBDA, DISAS_PROC, DISAS_SCRIPT }; int idx, result; if (objc != 3) { Tcl_WrongNumArgs(interp, 1, objv, "type procName|lambdaTerm|script"); return TCL_ERROR; } if (Tcl_GetIndexFromObj(interp, objv[1], types, "type", 0, &idx)!=TCL_OK){ return TCL_ERROR; } switch ((enum Types) idx) { case DISAS_LAMBDA: { Proc *procPtr = NULL; Command cmd; Tcl_Obj *nsObjPtr; Tcl_Namespace *nsPtr; /* * Compile (if uncompiled) and disassemble a lambda term. */ if (objv[2]->typePtr == &lambdaType) { procPtr = objv[2]->internalRep.twoPtrValue.ptr1; } if (procPtr == NULL || procPtr->iPtr != (Interp *) interp) { result = SetLambdaFromAny(interp, objv[2]); if (result != TCL_OK) { return result; } procPtr = objv[2]->internalRep.twoPtrValue.ptr1; } memset(&cmd, 0, sizeof(Command)); nsObjPtr = objv[2]->internalRep.twoPtrValue.ptr2; result = TclGetNamespaceFromObj(interp, nsObjPtr, &nsPtr); if (result != TCL_OK) { return result; } cmd.nsPtr = (Namespace *) nsPtr; procPtr->cmdPtr = &cmd; result = PushProcCallFrame(procPtr, interp, objc, objv, 1); if (result != TCL_OK) { return result; } TclPopStackFrame(interp); if (((ByteCode *) procPtr->bodyPtr->internalRep.otherValuePtr)->flags & TCL_BYTECODE_PRECOMPILED) { Tcl_AppendResult(interp, "may not disassemble prebuilt bytecode", NULL); return TCL_ERROR; } Tcl_SetObjResult(interp, TclDisassembleByteCodeObj(procPtr->bodyPtr)); break; } case DISAS_PROC: { Proc *procPtr = TclFindProc((Interp *) interp, TclGetString(objv[2])); if (procPtr == NULL) { Tcl_AppendResult(interp, "\"", TclGetString(objv[2]), "\" isn't a procedure", NULL); return TCL_ERROR; } /* * Compile (if uncompiled) and disassemble a procedure. */ result = PushProcCallFrame(procPtr, interp, 2, objv+1, 1); if (result != TCL_OK) { return result; } TclPopStackFrame(interp); if (((ByteCode *) procPtr->bodyPtr->internalRep.otherValuePtr)->flags & TCL_BYTECODE_PRECOMPILED) { Tcl_AppendResult(interp, "may not disassemble prebuilt bytecode", NULL); return TCL_ERROR; } Tcl_SetObjResult(interp, TclDisassembleByteCodeObj(procPtr->bodyPtr)); break; } case DISAS_SCRIPT: /* * Compile and disassemble a script. */ if (objv[2]->typePtr != &tclByteCodeType) { if (TclSetByteCodeFromAny(interp, objv[2], NULL, NULL) != TCL_OK){ return TCL_ERROR; } } Tcl_SetObjResult(interp, TclDisassembleByteCodeObj(objv[2])); break; } return TCL_OK; }  /* * Local Variables: * mode: c * c-basic-offset: 4 * fill-column: 78 * End: */

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