Tcl Source Code

    iPtr->stubTable = &tclStubs;
    iPtr->objResultPtr = Tcl_NewObj();
    Tcl_IncrRefCount(iPtr->objResultPtr);
    iPtr->handle = TclHandleCreate(iPtr);
    iPtr->globalNsPtr = NULL;
    iPtr->hiddenCmdTablePtr = NULL;
    iPtr->interpInfo = NULL;

    iPtr->optimizer = TclOptimizeBytecode;

    iPtr->numLevels = 0;
    iPtr->maxNestingDepth = MAX_NESTING_DEPTH;
    iPtr->framePtr = NULL;	/* Initialise as soon as :: is available */
    iPtr->varFramePtr = NULL;	/* Initialise as soon as :: is available */

    /*

InfoFrameCmd(
    ClientData dummy,		/* Not used. */
    Tcl_Interp *interp,		/* Current interpreter. */
    int objc,			/* Number of arguments. */
    Tcl_Obj *const objv[])	/* Argument objects. */
{
    Interp *iPtr = (Interp *) interp;
    int level, code = TCL_OK;
    CmdFrame *framePtr, **cmdFramePtrPtr = &iPtr->cmdFramePtr;
    CoroutineData *corPtr = iPtr->execEnvPtr->corPtr;
    int topLevel = 0;

    if (objc > 2) {
	Tcl_WrongNumArgs(interp, 1, objv, "?number?");
	return TCL_ERROR;
    }

    while (corPtr) {
	while (*cmdFramePtrPtr) {
	    topLevel++;

	    cmdFramePtrPtr = &((*cmdFramePtrPtr)->nextPtr);
	}
	if (corPtr->caller.cmdFramePtr) {

	    *cmdFramePtrPtr = corPtr->caller.cmdFramePtr;


	}
	corPtr = corPtr->callerEEPtr->corPtr;
    }
    topLevel += (*cmdFramePtrPtr)->level;


    if (topLevel != iPtr->cmdFramePtr->level) {
	framePtr = iPtr->cmdFramePtr;
	while (framePtr) {
	    framePtr->level = topLevel--;

	    framePtr = framePtr->nextPtr;
	}
	if (topLevel) {



	    Tcl_Panic("Broken frame level calculation");
	}
	topLevel = iPtr->cmdFramePtr->level;
    }

    if (objc == 1) {
	/*
	 * Just "info frame".
	 */

	    goto levelError;
	}
    }

    Tcl_SetObjResult(interp, TclInfoFrame(interp, framePtr));

  done:
    cmdFramePtrPtr = &iPtr->cmdFramePtr;
    corPtr = iPtr->execEnvPtr->corPtr;
    while (corPtr) {
	CmdFrame *endPtr = corPtr->caller.cmdFramePtr;

	if (endPtr) {
	    if (*cmdFramePtrPtr == endPtr) {
		*cmdFramePtrPtr = NULL;
	    } else {
		CmdFrame *runPtr = *cmdFramePtrPtr;

		while (runPtr->nextPtr != endPtr) {
		    runPtr->level -= endPtr->level;
		    runPtr = runPtr->nextPtr;
		}
		runPtr->level = 1;
		runPtr->nextPtr = NULL;
	    }
	    cmdFramePtrPtr = &corPtr->caller.cmdFramePtr;
	}
	corPtr = corPtr->callerEEPtr->corPtr;
    }
    return code;
}

/*
 *----------------------------------------------------------------------
 *

    }

    /*
     * Apply some peephole optimizations that can cross specific/generic
     * instruction generator boundaries.
     */

    if (iPtr->optimizer) {
	(iPtr->optimizer)(&compEnv);
    }

    /*
     * Invoke the compilation hook procedure if one exists.
     */

    if (hookProc) {
	result = hookProc(interp, &compEnv, clientData);

			    ExceptionAux *auxPtr);
MODULE_SCOPE void	TclFinalizeLoopExceptionRange(CompileEnv *envPtr,
			    int range);
#ifdef TCL_COMPILE_STATS
MODULE_SCOPE char *	TclLiteralStats(LiteralTable *tablePtr);
MODULE_SCOPE int	TclLog2(int value);
#endif
MODULE_SCOPE void	TclOptimizeBytecode(void *envPtr);
#ifdef TCL_COMPILE_DEBUG
MODULE_SCOPE void	TclPrintByteCodeObj(Tcl_Interp *interp,
			    Tcl_Obj *objPtr);
#endif
MODULE_SCOPE int	TclPrintInstruction(ByteCode *codePtr,
			    const unsigned char *pc);
MODULE_SCOPE void	TclPrintObject(FILE *outFile,

    Tcl_HashTable *hiddenCmdTablePtr;
				/* Hash table used by tclBasic.c to keep track
				 * of hidden commands on a per-interp
				 * basis. */
    ClientData interpInfo;	/* Information used by tclInterp.c to keep
				 * track of master/slave interps on a
				 * per-interp basis. */
    void (*optimizer)(void *envPtr);
    /*
     * Information related to procedures and variables. See tclProc.c and
     * tclVar.c for usage.
     */

    int numLevels;		/* Keeps track of how many nested calls to
				 * Tcl_Eval are in progress for this

 *	A very simple peephole optimizer for bytecode.
 *
 * ----------------------------------------------------------------------
 */

void
TclOptimizeBytecode(
    void *envPtr)
{
    ConvertZeroEffectToNOP(envPtr);
    AdvanceJumps(envPtr);
    TrimUnreachable(envPtr);
}

/*

    proc a {} stack
} -body {
    coroutine aa a
} -cleanup {
    rename stack {}
    rename a {}
} -result {}
test coroutine-3.7 {bug 0b874c344d} {
    dict get [coroutine X coroutine Y info frame 0] cmd
} {coroutine X coroutine Y info frame 0}

test coroutine-4.1 {bug #2093188} -setup {
    proc foo {} {
	set v 1
	trace add variable v {write unset} bar
	yield
	set v 2