Tcl Source Code

2013-08-01  Harald Oehlmann  <[email protected]>

	* tclUnixNotify.c Tcl_InitNotifier: Bug [a0bc856dcd]
	  Start notifier thread again if we were forked, to solve Rivet bug
	  55153.

2013-07-05  Kevin B. Kenny  <[email protected]>

	* library/tzdata/Africa/Casablanca:
	* library/tzdata/America/Asuncion:
	* library/tzdata/Antarctica/Macquarie:
	* library/tzdata/Asia/Gaza:

static Tcl_ObjCmdProc	ExprIsqrtFunc;
static Tcl_ObjCmdProc	ExprRandFunc;
static Tcl_ObjCmdProc	ExprRoundFunc;
static Tcl_ObjCmdProc	ExprSqrtFunc;
static Tcl_ObjCmdProc	ExprSrandFunc;
static Tcl_ObjCmdProc	ExprUnaryFunc;
static Tcl_ObjCmdProc	ExprWideFunc;
static Tcl_Obj *	GetCommandSource(Interp *iPtr, int objc,
			    Tcl_Obj *const objv[], int lookup);
static void		MathFuncWrongNumArgs(Tcl_Interp *interp, int expected,
			    int actual, Tcl_Obj *const *objv);
static Tcl_NRPostProc	NRCoroutineCallerCallback;
static Tcl_NRPostProc	NRCoroutineExitCallback;
static int NRCommand(ClientData data[], Tcl_Interp *interp, int result);

static Tcl_NRPostProc	NRRunObjProc;
static void		ProcessUnexpectedResult(Tcl_Interp *interp,
			    int returnCode);
static int		RewindCoroutine(CoroutineData *corPtr, int result);
static void		TEOV_SwitchVarFrame(Tcl_Interp *interp);
static void		TEOV_PushExceptionHandlers(Tcl_Interp *interp,
			    int objc, Tcl_Obj *const objv[], int flags);
static inline Command *	TEOV_LookupCmdFromObj(Tcl_Interp *interp,
			    Tcl_Obj *namePtr, Namespace *lookupNsPtr);
static int		TEOV_NotFound(Tcl_Interp *interp, int objc,
			    Tcl_Obj *const objv[], Namespace *lookupNsPtr);
static int		TEOV_RunEnterTraces(Tcl_Interp *interp,
			    Command **cmdPtrPtr, int objc,
			    Tcl_Obj *const objv[], Namespace *lookupNsPtr);
static Tcl_NRPostProc	RewindCoroutineCallback;
static Tcl_NRPostProc	TailcallCleanup;
static Tcl_NRPostProc	TEOEx_ByteCodeCallback;
static Tcl_NRPostProc	TEOEx_ListCallback;
static Tcl_NRPostProc	TEOV_Error;
static Tcl_NRPostProc	TEOV_Exception;

    return code;
}

/*
 *----------------------------------------------------------------------
 *
 * GetCommandSource --
 *
 *	This function returns a Tcl_Obj with the full source string for the
 *	command. This insures that traces get a correct NUL-terminated command
 *	string. The Tcl_Obj has refCount==1.
 *
 *	*** MAINTAINER WARNING ***
 *	The returned Tcl_Obj is all wrong for any purpose but getting the
 *	source string for an objc/objv command line in the stringRep (no
 *	stringRep if no source is available) and the corresponding substituted
 *	version in the List intrep.
 *	This means that the intRep and stringRep DO NOT COINCIDE! Using these
 *	Tcl_Objs normally is likely to break things.
 *
 *----------------------------------------------------------------------
 */

static Tcl_Obj *
GetCommandSource(
    Interp *iPtr,
    int objc,
    Tcl_Obj *const objv[],
    int lookup)
{
    Tcl_Obj *objPtr, *obj2Ptr;
    CmdFrame *cfPtr = iPtr->cmdFramePtr;
    const char *command = NULL;
    int numChars;

    objPtr = Tcl_NewListObj(objc, objv);
    if (lookup && cfPtr && (cfPtr->numLevels == iPtr->numLevels-1)) {
	switch (cfPtr->type) {
	case TCL_LOCATION_EVAL:
	case TCL_LOCATION_SOURCE:
	    command = cfPtr->cmd.str.cmd;
	    numChars = cfPtr->cmd.str.len;
	    break;
	case TCL_LOCATION_BC:
	case TCL_LOCATION_PREBC:
	    command = TclGetSrcInfoForCmd(iPtr, &numChars);
	    break;
	case TCL_LOCATION_EVAL_LIST:
	    /* Got it already */
	    break;
	}
	if (command) {
	    obj2Ptr = Tcl_NewStringObj(command, numChars);
	    objPtr->bytes = obj2Ptr->bytes;
	    objPtr->length = numChars;
	    obj2Ptr->bytes = NULL;
	    Tcl_DecrRefCount(obj2Ptr);
	}
    }
    Tcl_IncrRefCount(objPtr);
    return objPtr;
}

/*
 *----------------------------------------------------------------------
 *
 * TclCleanupCommand --
 *
 *	This function frees up a Command structure unless it is still
 *	referenced from an interpreter's command hashtable or from a CmdName
 *	Tcl object representing the name of a command in a ByteCode
 *	instruction sequence.
 *

  commandFound:
    if (iPtr->tracePtr || (cmdPtr->flags & CMD_HAS_EXEC_TRACES)) {
	/*
	 * Call enter traces. They will schedule a call to the leave traces if
	 * necessary.
	 */

	result = TEOV_RunEnterTraces(interp, &cmdPtr, objc, objv, lookupNsPtr);


	if (!cmdPtr) {
	    return TEOV_NotFound(interp, objc, objv, lookupNsPtr);
	}
	if (result != TCL_OK) {
	    return result;
	}
    }

    return result;
}

static int
TEOV_RunEnterTraces(
    Tcl_Interp *interp,
    Command **cmdPtrPtr,

    int objc,
    Tcl_Obj *const objv[],
    Namespace *lookupNsPtr)
{
    Interp *iPtr = (Interp *) interp;
    Command *cmdPtr = *cmdPtrPtr;
    int traceCode = TCL_OK;
    int cmdEpoch = cmdPtr->cmdEpoch;
    int newEpoch;
    const char *command;
    int length;
    Tcl_Obj *commandPtr;

    commandPtr = GetCommandSource(iPtr, objc, objv, 1);
    command = Tcl_GetStringFromObj(commandPtr, &length);

    /*
     * Call trace functions.
     * Execute any command or execution traces. Note that we bump up the
     * command's reference count for the duration of the calling of the traces
     * so that the structure doesn't go away underneath our feet.

     */

    if (cmdEpoch != newEpoch) {
	cmdPtr = TEOV_LookupCmdFromObj(interp, objv[0], lookupNsPtr);
	*cmdPtrPtr = cmdPtr;
    }

    if (cmdPtr) {
	/*
	 * Command was found: push a record to schedule the leave traces.
	 */

	TclNRAddCallback(interp, TEOV_RunLeaveTraces, INT2PTR(traceCode),
		commandPtr, cmdPtr, NULL);
	cmdPtr->refCount++;
    } else {
	Tcl_DecrRefCount(commandPtr);
    }
    return traceCode;
}

static int
TEOV_RunLeaveTraces(
    ClientData data[],
    Tcl_Interp *interp,
    int result)
{
    Interp *iPtr = (Interp *) interp;
    const char *command;
    int length, objc;
    Tcl_Obj **objv;
    int traceCode = PTR2INT(data[0]);

    Tcl_Obj *commandPtr = data[1];
    Command *cmdPtr = data[2];

    command = Tcl_GetStringFromObj(commandPtr, &length);
    if (TCL_OK != Tcl_ListObjGetElements(interp, commandPtr, &objc, &objv)) {
	Tcl_Panic("Who messed with commandPtr?");
    }

    if (!(cmdPtr->flags & CMD_IS_DELETED)) {



	if ((cmdPtr->flags & CMD_HAS_EXEC_TRACES) && traceCode == TCL_OK){
	    traceCode = TclCheckExecutionTraces(interp, command, length,
		    cmdPtr, result, TCL_TRACE_LEAVE_EXEC, objc, objv);
	}
	if (iPtr->tracePtr != NULL && traceCode == TCL_OK) {
	    traceCode = TclCheckInterpTraces(interp, command, length,
		    cmdPtr, result, TCL_TRACE_LEAVE_EXEC, objc, objv);
	}

    expand = expandStack;
    p = script;
    bytesLeft = numBytes;

    /*
     * TIP #280 Initialize tracking. Do not push on the frame stack yet.
     *
     * We may continue counting based on a specific context (CTX), or open a
     * new context, either for a sourced script, or 'eval'. For sourced files
     * we always have a path object, even if nothing was specified in the
     * interp itself. That makes code using it simpler as NULL checks can be
     * left out. Sourced file without path in the 'scriptFile' is possible
     * during Tcl initialization.
     */

    eeFramePtr->level = iPtr->cmdFramePtr ? iPtr->cmdFramePtr->level + 1 : 1;
    eeFramePtr->numLevels = iPtr->numLevels;
    eeFramePtr->framePtr = iPtr->framePtr;
    eeFramePtr->nextPtr = iPtr->cmdFramePtr;
    eeFramePtr->nline = 0;
    eeFramePtr->line = NULL;


    iPtr->cmdFramePtr = eeFramePtr;
    if (iPtr->evalFlags & TCL_EVAL_CTX) {
	/*
	 * Path information comes out of the context.
	 */

	eeFramePtr->type = TCL_LOCATION_SOURCE;
	eeFramePtr->data.eval.path = iPtr->invokeCmdFramePtr->data.eval.path;
	Tcl_IncrRefCount(eeFramePtr->data.eval.path);
    } else if (iPtr->evalFlags & TCL_EVAL_FILE) {
	/*
	 * Set up for a sourced file.
	 */

	eeFramePtr->type = TCL_LOCATION_SOURCE;

	if (iPtr->scriptFile) {

	     * TIP #280: Remember the command itself for 'info frame'. We
	     * shorten the visible command by one char to exclude the
	     * termination character, if necessary. Here is where we put our
	     * frame on the stack of frames too. _After_ the nested commands
	     * have been executed.
	     */

	    eeFramePtr->cmd.str.cmd = parsePtr->commandStart;
	    eeFramePtr->cmd.str.len = parsePtr->commandSize;

	    if (parsePtr->term ==
		    parsePtr->commandStart + parsePtr->commandSize - 1) {
		eeFramePtr->cmd.str.len--;
	    }

	    eeFramePtr->nline = objectsUsed;
	    eeFramePtr->line = lines;

	    TclArgumentEnter(interp, objv, objectsUsed, eeFramePtr);
	    code = Tcl_EvalObjv(interp, objectsUsed, objv, TCL_EVAL_NOERR);

	    TclArgumentRelease(interp, objv, objectsUsed);

	    eeFramePtr->line = NULL;
	    eeFramePtr->nline = 0;





	    if (code != TCL_OK) {
		goto error;
	    }
	    for (i = 0; i < objectsUsed; i++) {
		Tcl_DecrRefCount(objv[i]);
	    }

 *
 * Tcl_EvalObjEx, TclEvalObjEx --
 *
 *	Execute Tcl commands stored in a Tcl object. These commands are
 *	compiled into bytecodes if necessary, unless TCL_EVAL_DIRECT is
 *	specified.
 *





 * Results:
 *	The return value is one of the return codes defined in tcl.h (such as
 *	TCL_OK), and the interpreter's result contains a value to supplement
 *	the return code.
 *
 * Side effects:
 *	The object is converted, if necessary, to a ByteCode object that holds

    /*
     * This function consists of three independent blocks for: direct
     * evaluation of canonical lists, compilation and bytecode execution and
     * finally direct evaluation. Precisely one of these blocks will be run.
     */

    if (TclListObjIsCanonical(objPtr)) {
	Tcl_Obj *listPtr = objPtr;
	CmdFrame *eoFramePtr = NULL;
	int objc;
	Tcl_Obj **objv;

	/*
	 * Pure List Optimization (no string representation). In this case, we
	 * can safely use Tcl_EvalObjv instead and get an appreciable
	 * improvement in execution speed. This is because it allows us to
	 * avoid a setFromAny step that would just pack everything into a
	 * string and back out again.
	 *
	 * This also preserves any associations between list elements and
	 * location information for such elements.
	 *
	 * This restriction has been relaxed a bit by storing in lists whether
	 * they are "canonical" or not (a canonical list being one that is
	 * either pure or that has its string rep derived by
	 * UpdateStringOfList from the internal rep).
	 */

	/*
	 * Shimmer protection! Always pass an unshared obj. The caller could
	 * incr the refCount of objPtr AFTER calling us! To be completely safe
	 * we always make a copy. The callback takes care od the refCounts for
	 * both listPtr and objPtr.
	 *

	 * FIXME OPT: preserve just the internal rep?
	 */

	Tcl_IncrRefCount(objPtr);
	listPtr = TclListObjCopy(interp, objPtr);
	Tcl_IncrRefCount(listPtr);
	TclDecrRefCount(objPtr);

	if (word != INT_MIN) {
	    /*
	     * TIP #280 Structures for tracking lines. As we know that this is
	     * dynamic execution we ignore the invoker, even if known.
	     *
	     * TIP #280. We do _not_ compute all the line numbers for the

	     * should be pushed, as needed by alias and ensemble redirections.
	     */

	    eoFramePtr = TclStackAlloc(interp, sizeof(CmdFrame));
	    eoFramePtr->nline = 0;
	    eoFramePtr->line = NULL;

	    eoFramePtr->type = TCL_LOCATION_EVAL_LIST;
	    eoFramePtr->level = (iPtr->cmdFramePtr == NULL?
		    1 : iPtr->cmdFramePtr->level + 1);
	    eoFramePtr->numLevels = iPtr->numLevels;
	    eoFramePtr->framePtr = iPtr->framePtr;
	    eoFramePtr->nextPtr = iPtr->cmdFramePtr;


	    eoFramePtr->cmd.listPtr = listPtr;

	    eoFramePtr->data.eval.path = NULL;

	    iPtr->cmdFramePtr = eoFramePtr;


	}

	TclMarkTailcall(interp);
        TclNRAddCallback(interp, TEOEx_ListCallback, listPtr, eoFramePtr,
		NULL, NULL);

	ListObjGetElements(listPtr, objc, objv);
	return TclNREvalObjv(interp, objc, objv, flags, NULL);
    }

    if (!(flags & TCL_EVAL_DIRECT)) {
	/*

    }

    {
	/*
	 * We're not supposed to use the compiler or byte-code
	 * interpreter. Let Tcl_EvalEx evaluate the command directly (and
	 * probably more slowly).
	 *
	 * TIP #280. Propagate context as much as we can. Especially if the
	 * script to evaluate is a single literal it makes sense to look if
	 * our context is one with absolute line numbers we can then track
	 * into the literal itself too.
	 *
	 * See also tclCompile.c, TclInitCompileEnv, for the equivalent code
	 * in the bytecode compiler.
	 */

	const char *script;
	int numSrcBytes;

	/*
	 * Now we check if we have data about invisible continuation lines for

	 *
	 * Another important action is to save (and later restore) the
	 * continuation line information of the caller, in case we are
	 * executing nested commands in the eval/direct path.
	 */

	ContLineLoc *saveCLLocPtr = iPtr->scriptCLLocPtr;
	ContLineLoc *clLocPtr = TclContinuationsGet(objPtr);

	if (clLocPtr) {
	    iPtr->scriptCLLocPtr = clLocPtr;
	    Tcl_Preserve(iPtr->scriptCLLocPtr);
	} else {
	    iPtr->scriptCLLocPtr = NULL;
	}

	Tcl_IncrRefCount(objPtr);
	if (invoker == NULL) {
	    /*
	     * No context, force opening of our own.
	     */

	    script = Tcl_GetStringFromObj(objPtr, &numSrcBytes);
	    result = Tcl_EvalEx(interp, script, numSrcBytes, flags);
	} else {
	    /*
	     * We have an invoker, describing the command asking for the
	     * evaluation of a subordinate script. This script may originate
	     * in a literal word, or from a variable, etc. Using the line
	     * array we now check if we have good line information for the
	     * relevant word. The type of context is relevant as well. In a
	     * non-'source' context we don't have to try tracking lines.
	     *
	     * First see if the word exists and is a literal. If not we go
	     * through the easy dynamic branch. No need to perform more
	     * complex invokations.
	     */

	    int pc = 0;
	    CmdFrame *ctxPtr = TclStackAlloc(interp, sizeof(CmdFrame));

	    *ctxPtr = *invoker;
	    if (invoker->type == TCL_LOCATION_BC) {
		/*
		 * Note: Type BC => ctxPtr->data.eval.path is not used.
		 * ctxPtr->data.tebc.codePtr is used instead.
		 */

		TclGetSrcInfoForPc(ctxPtr);
		pc = 1;
	    }

	    script = Tcl_GetStringFromObj(objPtr, &numSrcBytes);

	    if ((invoker->nline <= word) ||
		    (invoker->line[word] < 0) ||
		    (ctxPtr->type != TCL_LOCATION_SOURCE)) {
		/*
		 * Dynamic script, or dynamic context, force our own context.
		 */

		result = Tcl_EvalEx(interp, script, numSrcBytes, flags);
	    } else {
		/*
		 * Absolute context to reuse.
		 */

		iPtr->invokeCmdFramePtr = ctxPtr;
		iPtr->evalFlags |= TCL_EVAL_CTX;

		result = TclEvalEx(interp, script, numSrcBytes, flags,
			ctxPtr->line[word], NULL, script);
	    }
	    if (pc && (ctxPtr->type == TCL_LOCATION_SOURCE)) {
		/*
		 * Death of SrcInfo reference.
		 */

		Tcl_DecrRefCount(ctxPtr->data.eval.path);
	    }
	    TclStackFree(interp, ctxPtr);
	}

	/*
	 * Now release the lock on the continuation line information, if any,
	 * and restore the caller's settings.
	 */

	if (iPtr->scriptCLLocPtr) {
	    Tcl_Release(iPtr->scriptCLLocPtr);
	}
	iPtr->scriptCLLocPtr = saveCLLocPtr;
	TclDecrRefCount(objPtr);
	return result;
    }
}

static int
TEOEx_ByteCodeCallback(
    ClientData data[],

    ClientData data[],
    Tcl_Interp *interp,
    int result)
{
    Interp *iPtr = (Interp *) interp;
    Tcl_Obj *listPtr = data[0];
    CmdFrame *eoFramePtr = data[1];


    /*
     * Remove the cmdFrame
     */

    if (eoFramePtr) {
	iPtr->cmdFramePtr = eoFramePtr->nextPtr;
	TclStackFree(interp, eoFramePtr);
    }

    TclDecrRefCount(listPtr);

    return result;
}

/*
 *----------------------------------------------------------------------

    case TCL_LOCATION_EVAL:
	/*
	 * Evaluation, dynamic script. Type, line, cmd, the latter through
	 * str.
	 */

	ADD_PAIR("type", Tcl_NewStringObj(typeString[framePtr->type], -1));

	ADD_PAIR("line", Tcl_NewIntObj(framePtr->line[0]));
	ADD_PAIR("cmd", Tcl_NewStringObj(framePtr->cmd.str.cmd,
		framePtr->cmd.str.len));
	break;

    case TCL_LOCATION_EVAL_LIST:
	/*
	 * List optimized evaluation. Type, line, cmd, the latter through
	 * listPtr, possibly a frame.
	 */

	ADD_PAIR("type", Tcl_NewStringObj(typeString[framePtr->type], -1));
	ADD_PAIR("line", Tcl_NewIntObj(1));

	/*
	 * We put a duplicate of the command list obj into the result to
	 * ensure that the 'pure List'-property of the command itself is not
	 * destroyed. Otherwise the query here would disable the list
	 * optimization path in Tcl_EvalObjEx.
	 */

	ADD_PAIR("cmd", Tcl_DuplicateObj(framePtr->cmd.listPtr));
	break;

    case TCL_LOCATION_PREBC:
	/*
	 * Precompiled. Result contains the type as signal, nothing else.
	 */

	    /*
	     * Death of reference by TclGetSrcInfoForPc.
	     */

	    Tcl_DecrRefCount(fPtr->data.eval.path);
	}

	ADD_PAIR("cmd",
		Tcl_NewStringObj(fPtr->cmd.str.cmd, fPtr->cmd.str.len));
	TclStackFree(interp, fPtr);
	break;
    }

    case TCL_LOCATION_SOURCE:
	/*
	 * Evaluation of a script file.
	 */

	ADD_PAIR("type", Tcl_NewStringObj(typeString[framePtr->type], -1));
	ADD_PAIR("line", Tcl_NewIntObj(framePtr->line[0]));
	ADD_PAIR("file", framePtr->data.eval.path);

	/*
	 * Refcount framePtr->data.eval.path goes up when lv is converted into
	 * the result list object.
	 */

	ADD_PAIR("cmd", Tcl_NewStringObj(framePtr->cmd.str.cmd,
		framePtr->cmd.str.len));
	break;

    case TCL_LOCATION_PROC:
	Tcl_Panic("TCL_LOCATION_PROC found in standard frame");
	break;
    }

     * 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);
    if (clLocPtr) {
	compEnv.clLoc = clLocPtr;
	compEnv.clNext = &compEnv.clLoc->loc[0];
	Tcl_Preserve(compEnv.clLoc);
    }

    TclCompileScript(interp, stringPtr, length, &compEnv);

    /*
     * Successful compilation. Add a "done" instruction at the end.
     */

	    !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);
    }

    envPtr->extCmdMapPtr = ckalloc(sizeof(ExtCmdLoc));
    envPtr->extCmdMapPtr->loc = NULL;
    envPtr->extCmdMapPtr->nloc = 0;
    envPtr->extCmdMapPtr->nuloc = 0;
    envPtr->extCmdMapPtr->path = NULL;

    if ((invoker == NULL) || (invoker->type == TCL_LOCATION_EVAL_LIST)) {
	/*
	 * Initialize the compiler for relative counting in case of a
	 * dynamic context.
	 */

	envPtr->line = 1;
	if (iPtr->evalFlags & TCL_EVAL_FILE) {

    /*
     * 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->clNext = NULL;

    envPtr->auxDataArrayPtr = envPtr->staticAuxDataArraySpace;
    envPtr->auxDataArrayNext = 0;
    envPtr->auxDataArrayEnd = COMPILEENV_INIT_AUX_DATA_SIZE;
    envPtr->mallocedAuxDataArray = 0;
}

    if (envPtr->mallocedAuxDataArray) {
	ckfree(envPtr->auxDataArrayPtr);
    }
    if (envPtr->extCmdMapPtr) {
	ReleaseCmdWordData(envPtr->extCmdMapPtr);
	envPtr->extCmdMapPtr = NULL;
    }

    /*
     * If we used data about invisible continuation lines, then now is the
     * time to release on our hold on it. The lock was set in function
     * TclSetByteCodeFromAny(), found in this file.
     */

    if (envPtr->clLoc) {
	Tcl_Release(envPtr->clLoc);
    }
}

/*
 *----------------------------------------------------------------------
 *
 * TclWordKnownAtCompileTime --
 *

				 * inefficient. If set to 2, that instruction
				 * should not be issued at all (by the generic
				 * part of the command compiler). */
    int expandCount;		/* Number of INST_EXPAND_START instructions
				 * encountered that have not yet been paired
				 * with a corresponding
				 * INST_INVOKE_EXPANDED. */
    ContLineLoc *clLoc;		/* If not NULL, the table holding the
				 * locations of the invisible continuation
				 * lines in the input script, to adjust the
				 * line counter. */
    int *clNext;		/* If not NULL, it refers to the next slot in
				 * clLoc to check for an invisible
				 * continuation line. */
} CompileEnv;

/*
 * The structure defining the bytecode instructions resulting from compiling a

     * TIP #280: Initialize the frame. Do not push it yet: it will be pushed
     * every time that we call out from this TD, popped when we return to it.
     */

    bcFramePtr->type = ((codePtr->flags & TCL_BYTECODE_PRECOMPILED)
	    ? TCL_LOCATION_PREBC : TCL_LOCATION_BC);
    bcFramePtr->level = (iPtr->cmdFramePtr ? iPtr->cmdFramePtr->level+1 : 1);
    bcFramePtr->numLevels = iPtr->numLevels;
    bcFramePtr->framePtr = iPtr->framePtr;
    bcFramePtr->nextPtr = iPtr->cmdFramePtr;
    bcFramePtr->nline = 0;
    bcFramePtr->line = NULL;
    bcFramePtr->litarg = NULL;
    bcFramePtr->data.tebc.codePtr = codePtr;
    bcFramePtr->data.tebc.pc = NULL;
    bcFramePtr->cmd.str.cmd = NULL;
    bcFramePtr->cmd.str.len = 0;


#ifdef TCL_COMPILE_STATS
    iPtr->stats.numExecutions++;
#endif

    /*
     * Push the callback for bytecode execution

#endif

    if (data[1] /* resume from invocation */) {
	if (iPtr->execEnvPtr->rewind) {
	    result = TCL_ERROR;
	}
	NRE_ASSERT(iPtr->cmdFramePtr == bcFramePtr);





	iPtr->cmdFramePtr = bcFramePtr->nextPtr;
	if (iPtr->flags & INTERP_DEBUG_FRAME) {
	    TclArgumentBCRelease((Tcl_Interp *) iPtr, bcFramePtr);
	}
	if (codePtr->flags & TCL_BYTECODE_RECOMPILE) {
	    iPtr->flags |= ERR_ALREADY_LOGGED;
	    codePtr->flags &= ~TCL_BYTECODE_RECOMPILE;

	}

	DECACHE_STACK_INFO();

	pc += pcAdjustment;
	TEBC_YIELD();
	return TclNREvalObjv(interp, objc, objv,
		TCL_EVAL_NOERR, NULL);

    /*
     * INST_CALL_BUILTIN_FUNC1 and INST_CALL_FUNC1 were made obsolete by the
     * changes to add a ::tcl::mathfunc namespace in 8.5.
     */

    case INST_CALL_BUILTIN_FUNC1:

	    Tcl_GetString(opndPtr), operator));
    Tcl_SetErrorCode(interp, "ARITH", "DOMAIN", description, NULL);
}

/*
 *----------------------------------------------------------------------
 *
 * TclGetSrcInfoForPc, GetSrcInfoForPc, TclGetSrcInfoForCmd --
 *
 *	Given a program counter value, finds the closest command in the
 *	bytecode code unit's CmdLocation array and returns information about
 *	that command's source: a pointer to its first byte and the number of
 *	characters.
 *
 * Results:
 *	If a command is found that encloses the program counter value, a
 *	pointer to the command's source is returned and the length of the
 *	source is stored at *lengthPtr. If multiple commands resulted in code
 *	at pc, information about the closest enclosing command is returned. If
 *	no matching command is found, NULL is returned and *lengthPtr is
 *	unchanged.
 *
 * Side effects:
 *	The CmdFrame at *cfPtr is updated.
 *
 *----------------------------------------------------------------------
 */

const char *
TclGetSrcInfoForCmd(
    Interp *iPtr,
    int *lenPtr)

{




    CmdFrame *cfPtr = iPtr->cmdFramePtr;
    ByteCode *codePtr = (ByteCode *) cfPtr->data.tebc.codePtr;

    return GetSrcInfoForPc((unsigned char *) cfPtr->data.tebc.pc,
	    codePtr, lenPtr, NULL, NULL);





}

void
TclGetSrcInfoForPc(
    CmdFrame *cfPtr)
{
    ByteCode *codePtr = (ByteCode *) cfPtr->data.tebc.codePtr;



    if (cfPtr->cmd.str.cmd == NULL) {

	cfPtr->cmd.str.cmd = GetSrcInfoForPc(
		(unsigned char *) cfPtr->data.tebc.pc, codePtr,
		&cfPtr->cmd.str.len, NULL, NULL);
    }

    if (cfPtr->cmd.str.cmd != NULL) {

	/*
	 * We now have the command. We can get the srcOffset back and from
	 * there find the list of word locations for this command.
	 */

	ExtCmdLoc *eclPtr;
	ECL *locPtr = NULL;
	int srcOffset, i;
	Interp *iPtr = (Interp *) *codePtr->interpHandle;
	Tcl_HashEntry *hePtr =
		Tcl_FindHashEntry(iPtr->lineBCPtr, codePtr);

	if (!hePtr) {
	    return;
	}

	srcOffset = cfPtr->cmd.str.cmd - codePtr->source;
	eclPtr = Tcl_GetHashValue(hePtr);

	for (i=0; i < eclPtr->nuloc; i++) {
	    if (eclPtr->loc[i].srcOffset == srcOffset) {
		locPtr = eclPtr->loc+i;
		break;
	    }

				 * NULL. */
    struct CmdFrame *nextPtr;	/* Link to calling frame. */
    /*
     * Data needed for Eval vs TEBC
     *
     * EXECUTION CONTEXTS and usage of CmdFrame
     *
     * Field	  TEBC		  EvalEx	  EvalObjEx
     * =======	  ====		  ======	  =========
     * level	  yes		  yes		  yes
     * type	  BC/PREBC	  SRC/EVAL	  EVAL_LIST
     * line0	  yes		  yes		  yes
     * framePtr	  yes		  yes		  yes
     * =======	  ====		  ======	  =========
     *
     * =======	  ====		  ======	  ========= union data
     * line1	  -		  yes		  -
     * line3	  -		  yes		  -
     * path	  -		  yes		  -
     * -------	  ----		  ------	  ---------
     * codePtr	  yes		  -		  -
     * pc	  yes		  -		  -
     * =======	  ====		  ======	  =========
     *
     * =======	  ====		  ======	  ========= | union cmd
     * listPtr	  -		  -		  yes	    |
     * -------	  ----		  ------	  --------- |
     * cmd	  yes		  yes		  -	    |
     * cmdlen	  yes		  yes		  -	    |
     * -------	  ----		  ------	  --------- |
     */

    union {
	struct {
	    Tcl_Obj *path;	/* Path of the sourced file the command is
				 * in. */
	} eval;
	struct {
	    const void *codePtr;/* Byte code currently executed... */
	    const char *pc;	/* ... and instruction pointer. */
	} tebc;
    } data;
    union {
	struct {
	    const char *cmd;	/* The executed command, if possible... */
	    int len;		/* ... and its length. */
	} str;
	Tcl_Obj *listPtr;	/* Tcl_EvalObjEx, cmd list. */
    } cmd;
    int numLevels;		/* Value of interp's numLevels when the frame
				 * was pushed. */
    const struct CFWordBC *litarg;
				/* Link to set of literal arguments which have
				 * ben pushed on the lineLABCPtr stack by
				 * TclArgumentBCEnter(). These will be removed
				 * by TclArgumentBCRelease. */
} CmdFrame;

/*
 * The following macros define the allowed values for the type field of the
 * CmdFrame structure above. Some of the values occur only in the extended
 * location data referenced via the 'baseLocPtr'.
 *
 * TCL_LOCATION_EVAL	  : Frame is for a script evaluated by EvalEx.
 * TCL_LOCATION_EVAL_LIST : Frame is for a script evaluated by the list
 *			    optimization path of EvalObjEx.
 * TCL_LOCATION_BC	  : Frame is for bytecode.
 * TCL_LOCATION_PREBC	  : Frame is for precompiled bytecode.
 * TCL_LOCATION_SOURCE	  : Frame is for a script evaluated by EvalEx, from a
 *			    sourced file.
 * TCL_LOCATION_PROC	  : Frame is for bytecode of a procedure.
 *
 * A TCL_LOCATION_BC type in a frame can be overridden by _SOURCE and _PROC
 * types, per the context of the byte code in execution.
 */

#define TCL_LOCATION_EVAL	(0) /* Location in a dynamic eval script. */
#define TCL_LOCATION_EVAL_LIST	(1) /* Location in a dynamic eval script,
				     * list-path. */
#define TCL_LOCATION_BC		(2) /* Location in byte code. */
#define TCL_LOCATION_PREBC	(3) /* Location in precompiled byte code, no
				     * location. */
#define TCL_LOCATION_SOURCE	(4) /* Location in a file. */
#define TCL_LOCATION_PROC	(5) /* Location in a dynamic proc. */
#define TCL_LOCATION_LAST	(6) /* Number of values in the enum. */

 * EvalFlag bits for Interp structures:
 *
 * TCL_ALLOW_EXCEPTIONS	1 means it's OK for the script to terminate with a
 *			code other than TCL_OK or TCL_ERROR; 0 means codes
 *			other than these should be turned into errors.
 */

#define TCL_ALLOW_EXCEPTIONS	4
#define TCL_EVAL_FILE		2
#define TCL_EVAL_CTX		8

/*
 * Flag bits for Interp structures:
 *
 * DELETED:		Non-zero means the interpreter has been deleted:
 *			don't process any more commands for it, and destroy
 *			the structure as soon as all nested invocations of

MODULE_SCOPE int	TclGetNumberFromObj(Tcl_Interp *interp,
			    Tcl_Obj *objPtr, ClientData *clientDataPtr,
			    int *typePtr);
MODULE_SCOPE int	TclGetOpenModeEx(Tcl_Interp *interp,
			    const char *modeString, int *seekFlagPtr,
			    int *binaryPtr);
MODULE_SCOPE Tcl_Obj *	TclGetProcessGlobalValue(ProcessGlobalValue *pgvPtr);
MODULE_SCOPE const char *TclGetSrcInfoForCmd(Interp *iPtr, int *lenPtr);

MODULE_SCOPE int	TclIncrObj(Tcl_Interp *interp, Tcl_Obj *valuePtr,
			    Tcl_Obj *incrPtr);
MODULE_SCOPE Tcl_Obj *	TclIncrObjVar2(Tcl_Interp *interp, Tcl_Obj *part1Ptr,
			    Tcl_Obj *part2Ptr, Tcl_Obj *incrPtr, int flags);
MODULE_SCOPE int	TclInfoExistsCmd(ClientData dummy, Tcl_Interp *interp,
			    int objc, Tcl_Obj *const objv[]);
MODULE_SCOPE int	TclInfoCoroutineCmd(ClientData dummy, Tcl_Interp *interp,

     * Allocate some working space.
     */

    superclasses = (Class **) ckalloc(sizeof(Class *) * superc);

    /*
     * Parse the arguments to get the class to use as superclasses.



     */









    for (i=0 ; i<superc ; i++) {
	superclasses[i] = GetClassInOuterContext(interp, superv[i],
		"only a class can be a superclass");
	if (superclasses[i] == NULL) {
	    goto failedAfterAlloc;
	}
	for (j=0 ; j<i ; j++) {
	    if (superclasses[j] == superclasses[i]) {
		Tcl_SetObjResult(interp, Tcl_NewStringObj(
			"class should only be a direct superclass once", -1));

		Tcl_SetErrorCode(interp, "TCL", "OO", "REPETITIOUS", NULL);
		goto failedAfterAlloc;
	    }
	}
	if (TclOOIsReachable(oPtr->classPtr, superclasses[i])) {
	    Tcl_SetObjResult(interp, Tcl_NewStringObj(
		    "attempt to form circular dependency graph", -1));
	    Tcl_SetErrorCode(interp, "TCL", "OO", "CIRCULARITY", NULL);
	failedAfterAlloc:
	    ckfree((char *) superclasses);
	    return TCL_ERROR;

	}
    }

    /*
     * Install the list of superclasses into the class. Note that this also
     * involves splicing the class out of the superclasses' subclass list that
     * it used to be a member of and splicing it into the new superclasses'

		cfPtr->nline = 1;
		cfPtr->framePtr = NULL;
		cfPtr->nextPtr = NULL;

		cfPtr->data.eval.path = context.data.eval.path;
		Tcl_IncrRefCount(cfPtr->data.eval.path);

		cfPtr->cmd.str.cmd = NULL;
		cfPtr->cmd.str.len = 0;

		hPtr = Tcl_CreateHashEntry(iPtr->linePBodyPtr,
			(char *) procPtr, &isNew);
		Tcl_SetHashValue(hPtr, cfPtr);
	    }

	    /*

		cfPtr->nline = 1;
		cfPtr->framePtr = NULL;
		cfPtr->nextPtr = NULL;

		cfPtr->data.eval.path = context.data.eval.path;
		Tcl_IncrRefCount(cfPtr->data.eval.path);

		cfPtr->cmd.str.cmd = NULL;
		cfPtr->cmd.str.len = 0;

		hPtr = Tcl_CreateHashEntry(iPtr->linePBodyPtr,
			(char *) procPtr, &isNew);
		Tcl_SetHashValue(hPtr, cfPtr);
	    }

	    /*

                                 * that a Tcl_Obj was not allocated by some
                                 * other thread. */
#endif /* TCL_MEM_DEBUG && TCL_THREADS */
} ThreadSpecificData;

static Tcl_ThreadDataKey dataKey;

static void             ContLineLocFree(char *clientData);
static void             TclThreadFinalizeContLines(ClientData clientData);
static ThreadSpecificData *TclGetContLineTable(void);

/*
 * Nested Tcl_Obj deletion management support
 *
 * All context references used in the object freeing code are pointers to this

    ThreadSpecificData *tsdPtr = TclGetContLineTable();
    Tcl_HashEntry *hPtr;
    Tcl_HashSearch hSearch;

    for (hPtr = Tcl_FirstHashEntry(tsdPtr->lineCLPtr, &hSearch);
	    hPtr != NULL; hPtr = Tcl_NextHashEntry(&hSearch)) {
	/*
	 * We are not using Tcl_EventuallyFree (as in TclFreeObj()) because
	 * here we can be sure that the compiler will not hold references to
	 * the data in the hashtable, and using TEF might bork the
	 * finalization sequence.
	 */

	ContLineLocFree(Tcl_GetHashValue(hPtr));
	Tcl_DeleteHashEntry(hPtr);
    }
    Tcl_DeleteHashTable(tsdPtr->lineCLPtr);
    ckfree(tsdPtr->lineCLPtr);
    tsdPtr->lineCLPtr = NULL;
}

/*
 *----------------------------------------------------------------------
 *
 * ContLineLocFree --
 *
 *	The freProc for continuation line location tables.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	Releases memory.
 *
 * TIP #280
 *----------------------------------------------------------------------
 */

static void
ContLineLocFree(
    char *clientData)
{
    ckfree(clientData);
}

/*
 *--------------------------------------------------------------
 *
 * Tcl_RegisterObjType --
 *
 *	This function is called to register a new Tcl object type in the table

    {
	ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey);
        Tcl_HashEntry *hPtr;

	if (tsdPtr->lineCLPtr) {
            hPtr = Tcl_FindHashEntry(tsdPtr->lineCLPtr, objPtr);
	    if (hPtr) {
		Tcl_EventuallyFree(Tcl_GetHashValue(hPtr), ContLineLocFree);
		Tcl_DeleteHashEntry(hPtr);
	    }
	}
    }
}
#else /* TCL_MEM_DEBUG */

    {
	ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey);
        Tcl_HashEntry *hPtr;

	if (tsdPtr->lineCLPtr) {
            hPtr = Tcl_FindHashEntry(tsdPtr->lineCLPtr, objPtr);
	    if (hPtr) {
		Tcl_EventuallyFree(Tcl_GetHashValue(hPtr), ContLineLocFree);
		Tcl_DeleteHashEntry(hPtr);
	    }
	}
    }
}
#endif /* TCL_MEM_DEBUG */


 * Copyright (c) 1998-2000 Ajuba Solutions.
 * Contributions from Don Porter, NIST, 2002. (not subject to US copyright)
 *
 * See the file "license.terms" for information on usage and redistribution of
 * this file, and for a DISCLAIMER OF ALL WARRANTIES.
 */
 

#include "tclInt.h"
#include "tclParse.h"

/*
 * The following table provides parsing information about each possible 8-bit
 * character. The table is designed to be referenced with either signed or
 * unsigned characters, so it has 384 entries. The first 128 entries

    }
    objPtr = Tcl_GetObjResult(interp);

    /*
     * At this point we should have an object containing the value of a
     * variable. Just return the string from that object.
     *
     * This should have returned the object for the user to manage, but
     * instead we have some weak reference to the string value in the object,
     * which is why we make sure the object exists after resetting the result.
     * This isn't ideal, but it's the best we can do with the current
     * documented interface. -- hobbs
     */

    if (!Tcl_IsShared(objPtr)) {
	Tcl_IncrRefCount(objPtr);
    }
    Tcl_ResetResult(interp);
    return TclGetString(objPtr);
}

/*
 *----------------------------------------------------------------------
 *

		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;

		hePtr = Tcl_CreateHashEntry(iPtr->linePBodyPtr,
			procPtr, &isNew);
		if (!isNew) {
		    /*
		     * Get the old command frame and release it. See also
		     * TclProcCleanupProc in this file. Currently it seems as

		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;
	    }

	    /*
	     * 'contextPtr' is going out of scope. Release the reference that
	     * it's holding to the source file path
	     */

		set name ::[join [lreverse $contextStack] ::]
		# create artifical proc to force an entry in the tclIndex
		$parser eval [list ::proc $name {} {}]
	    }
	}
    }
}















return

							 :America/Santiago
        {-14400 0 3600 0 2 0 5 2 0 0 0 0 11 0 1 2 0 0 0} :America/Manaus
        {-14400 0 3600 0 11 0 1 2 0 0 0 0 3 0 2 2 0 0 0} :America/Halifax
	{-12600 0 3600 0 10 0 5 2 0 0 0 0 4 0 1 2 0 0 0} :America/St_Johns
	{-10800 0 3600 0 2 0 2 2 0 0 0 0 10 0 3 2 0 0 0} :America/Sao_Paulo
	{-10800 0 3600 0 10 0 5 2 0 0 0 0 4 0 1 2 0 0 0} :America/Godthab
	{-10800 0 3600 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0}  :America/Buenos_Aires
        {-10800 0 3600 0 2 0 5 2 0 0 0 0 11 0 1 2 0 0 0} :America/Brasilia
        {-10800 0 3600 0 3 0 2 2 0 0 0 0 10 0 1 2 0 0 0} :America/Montevideo
	{-7200 0 3600 0 9 0 5 2 0 0 0 0 3 0 5 2 0 0 0}   :America/Noronha
	{-3600 0 3600 0 10 0 5 3 0 0 0 0 3 0 5 2 0 0 0}  :Atlantic/Azores
	{-3600 0 3600 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0}   :Atlantic/Cape_Verde
	{0 0 3600 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0}       :UTC
	{0 0 3600 0 10 0 5 2 0 0 0 0 3 0 5 1 0 0 0}      :Europe/London
	{3600 0 3600 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0}    :Africa/Kinshasa

} {{-append -clear -set} {Get Set}}
test oo-34.8 {TIP 380: slots - presence} {
    getMethods oo::objdefine::mixin
} {{-append -clear -set} {--default-operation Get Set}}
test oo-34.9 {TIP 380: slots - presence} {
    getMethods oo::objdefine::variable
} {{-append -clear -set} {Get Set}}





































cleanupTests
return

# Local Variables:
# mode: tcl
# End:

test parse-21.0 {Bug 1884496} testevent {
    set ::script {testevent delete a; set a [p]; set ::done $a}
    proc ::p {} {string first s $::script}
    testevent queue a head $::script
    vwait done
} {}







cleanupTests
}

namespace delete ::tcl::test::parse
return

namespace import -force ::tcltest::*

testConstraint testfork [llength [info commands testfork]]

# Test if the notifier thread is well initialized in a forked interpreter
# by Tcl_InitNotifier
test unixforkevent-1.1 {fork and test writeable event} \
    -constraints testfork \
    -body {
	set myFolder [makeDirectory unixtestfork]
	set pid [testfork]
	if {$pid == 0} {
	    # we are the forked process
	    set result initialized
	    set h [open [file join $myFolder test.txt] w]

		fi
	    fi
	fi

	# Does the pthread-implementation provide
	# 'pthread_attr_setstacksize' ?





for ac_func in pthread_attr_setstacksize pthread_atfork
do
as_ac_var=`echo "ac_cv_func_$ac_func" | $as_tr_sh`
echo "$as_me:$LINENO: checking for $ac_func" >&5
echo $ECHO_N "checking for $ac_func... $ECHO_C" >&6
if eval "test \"\${$as_ac_var+set}\" = set"; then

  cat >>confdefs.h <<_ACEOF
#define `echo "HAVE_$ac_func" | $as_tr_cpp` 1
_ACEOF

fi
done


    else
	TCL_THREADS=0
    fi
    # Do checking message here to not mess up interleaved configure output
    echo "$as_me:$LINENO: checking for building with threads" >&5
echo $ECHO_N "checking for building with threads... $ECHO_C" >&6
    if test "${TCL_THREADS}" = 1; then

		    fi
		fi
	    fi
	fi

	# Does the pthread-implementation provide
	# 'pthread_attr_setstacksize' ?



	AC_CHECK_FUNCS(pthread_attr_setstacksize pthread_atfork)

    else
	TCL_THREADS=0
    fi
    # Do checking message here to not mess up interleaved configure output
    AC_MSG_CHECKING([for building with threads])
    if test "${TCL_THREADS}" = 1; then
	AC_DEFINE(TCL_THREADS, 1, [Are we building with threads enabled?])

    }
    pid = fork();
    if (pid == -1) {
        Tcl_AppendResult(interp,
                "Cannot fork", NULL);
        return TCL_ERROR;
    }
#ifndef HAVE_PTHREAD_ATFORK
    /* Only needed when pthread_atfork is not present. */
    if (pid==0) {
	Tcl_InitNotifier();
    }
#endif
    Tcl_SetObjResult(interp, Tcl_NewIntObj(pid));
    return TCL_OK;
}