diff options
Diffstat (limited to 'generic/tclBasic.c')
| -rw-r--r-- | generic/tclBasic.c | 1362 |
1 files changed, 656 insertions, 706 deletions
diff --git a/generic/tclBasic.c b/generic/tclBasic.c index db365e3..1220239 100644 --- a/generic/tclBasic.c +++ b/generic/tclBasic.c @@ -127,17 +127,12 @@ 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 NRCoroutineActivateCallback; static Tcl_NRPostProc NRCoroutineCallerCallback; static Tcl_NRPostProc NRCoroutineExitCallback; static int NRCommand(ClientData data[], Tcl_Interp *interp, int result); -static Tcl_NRPostProc NRRunObjProc; -static Tcl_NRPostProc NRTailcallEval; static Tcl_ObjCmdProc OldMathFuncProc; static void OldMathFuncDeleteProc(ClientData clientData); static void ProcessUnexpectedResult(Tcl_Interp *interp, @@ -151,8 +146,8 @@ static inline Command * TEOV_LookupCmdFromObj(Tcl_Interp *interp, 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); + Command **cmdPtrPtr, Tcl_Obj *commandPtr, int objc, + Tcl_Obj *const objv[]); static Tcl_NRPostProc RewindCoroutineCallback; static Tcl_NRPostProc TailcallCleanup; static Tcl_NRPostProc TEOEx_ByteCodeCallback; @@ -162,11 +157,11 @@ static Tcl_NRPostProc TEOV_Exception; static Tcl_NRPostProc TEOV_NotFoundCallback; static Tcl_NRPostProc TEOV_RestoreVarFrame; static Tcl_NRPostProc TEOV_RunLeaveTraces; -static Tcl_NRPostProc YieldToCallback; +static Tcl_NRPostProc EvalObjvCore; +static Tcl_NRPostProc Dispatch; -static void ClearTailcall(Tcl_Interp *interp, - struct NRE_callback *tailcallPtr); static Tcl_ObjCmdProc NRCoroInjectObjCmd; +static Tcl_NRPostProc NRPostInvoke; MODULE_SCOPE const TclStubs tclStubs; @@ -190,11 +185,16 @@ typedef struct { Tcl_ObjCmdProc *objProc; /* Object-based function for command. */ CompileProc *compileProc; /* Function called to compile command. */ Tcl_ObjCmdProc *nreProc; /* NR-based function for command */ - int isSafe; /* If non-zero, command will be present in - * safe interpreter. Otherwise it will be - * hidden. */ + int flags; /* Various flag bits, as defined below. */ } CmdInfo; +#define CMD_IS_SAFE 1 /* Whether this command is part of the set of + * commands present by default in a safe + * interpreter. */ +/* CMD_COMPILES_EXPANDED - Whether the compiler for this command can handle + * expansion for itself rather than needing the generic layer to take care of + * it for it. Defined in tclInt.h. */ + /* * The built-in commands, and the functions that implement them: */ @@ -204,94 +204,95 @@ static const CmdInfo builtInCmds[] = { * Commands in the generic core. */ - {"append", Tcl_AppendObjCmd, TclCompileAppendCmd, NULL, 1}, - {"apply", Tcl_ApplyObjCmd, NULL, TclNRApplyObjCmd, 1}, - {"break", Tcl_BreakObjCmd, TclCompileBreakCmd, NULL, 1}, + {"append", Tcl_AppendObjCmd, TclCompileAppendCmd, NULL, CMD_IS_SAFE}, + {"apply", Tcl_ApplyObjCmd, NULL, TclNRApplyObjCmd, CMD_IS_SAFE}, + {"break", Tcl_BreakObjCmd, TclCompileBreakCmd, NULL, CMD_IS_SAFE}, #ifndef EXCLUDE_OBSOLETE_COMMANDS - {"case", Tcl_CaseObjCmd, NULL, NULL, 1}, + {"case", Tcl_CaseObjCmd, NULL, NULL, CMD_IS_SAFE}, #endif - {"catch", Tcl_CatchObjCmd, TclCompileCatchCmd, TclNRCatchObjCmd, 1}, - {"concat", Tcl_ConcatObjCmd, NULL, NULL, 1}, - {"continue", Tcl_ContinueObjCmd, TclCompileContinueCmd, NULL, 1}, - {"coroutine", NULL, NULL, TclNRCoroutineObjCmd, 1}, - {"error", Tcl_ErrorObjCmd, TclCompileErrorCmd, NULL, 1}, - {"eval", Tcl_EvalObjCmd, NULL, TclNREvalObjCmd, 1}, - {"expr", Tcl_ExprObjCmd, TclCompileExprCmd, TclNRExprObjCmd, 1}, - {"for", Tcl_ForObjCmd, TclCompileForCmd, TclNRForObjCmd, 1}, - {"foreach", Tcl_ForeachObjCmd, TclCompileForeachCmd, TclNRForeachCmd, 1}, - {"format", Tcl_FormatObjCmd, NULL, NULL, 1}, - {"global", Tcl_GlobalObjCmd, TclCompileGlobalCmd, NULL, 1}, - {"if", Tcl_IfObjCmd, TclCompileIfCmd, TclNRIfObjCmd, 1}, - {"incr", Tcl_IncrObjCmd, TclCompileIncrCmd, NULL, 1}, - {"join", Tcl_JoinObjCmd, NULL, NULL, 1}, - {"lappend", Tcl_LappendObjCmd, TclCompileLappendCmd, NULL, 1}, - {"lassign", Tcl_LassignObjCmd, TclCompileLassignCmd, NULL, 1}, - {"lindex", Tcl_LindexObjCmd, TclCompileLindexCmd, NULL, 1}, - {"linsert", Tcl_LinsertObjCmd, NULL, NULL, 1}, - {"list", Tcl_ListObjCmd, TclCompileListCmd, NULL, 1}, - {"llength", Tcl_LlengthObjCmd, TclCompileLlengthCmd, NULL, 1}, - {"lrange", Tcl_LrangeObjCmd, TclCompileLrangeCmd, NULL, 1}, - {"lrepeat", Tcl_LrepeatObjCmd, NULL, NULL, 1}, - {"lreplace", Tcl_LreplaceObjCmd, TclCompileLreplaceCmd, NULL, 1}, - {"lreverse", Tcl_LreverseObjCmd, NULL, NULL, 1}, - {"lsearch", Tcl_LsearchObjCmd, NULL, NULL, 1}, - {"lset", Tcl_LsetObjCmd, TclCompileLsetCmd, NULL, 1}, - {"lsort", Tcl_LsortObjCmd, NULL, NULL, 1}, - {"package", Tcl_PackageObjCmd, NULL, NULL, 1}, - {"proc", Tcl_ProcObjCmd, NULL, NULL, 1}, - {"regexp", Tcl_RegexpObjCmd, TclCompileRegexpCmd, NULL, 1}, - {"regsub", Tcl_RegsubObjCmd, NULL, NULL, 1}, - {"rename", Tcl_RenameObjCmd, NULL, NULL, 1}, - {"return", Tcl_ReturnObjCmd, TclCompileReturnCmd, NULL, 1}, - {"scan", Tcl_ScanObjCmd, NULL, NULL, 1}, - {"set", Tcl_SetObjCmd, TclCompileSetCmd, NULL, 1}, - {"split", Tcl_SplitObjCmd, NULL, NULL, 1}, - {"subst", Tcl_SubstObjCmd, TclCompileSubstCmd, TclNRSubstObjCmd, 1}, - {"switch", Tcl_SwitchObjCmd, TclCompileSwitchCmd, TclNRSwitchObjCmd, 1}, - {"tailcall", NULL, NULL, TclNRTailcallObjCmd, 1}, - {"throw", Tcl_ThrowObjCmd, TclCompileThrowCmd, NULL, 1}, - {"trace", Tcl_TraceObjCmd, NULL, NULL, 1}, - {"try", Tcl_TryObjCmd, TclCompileTryCmd, TclNRTryObjCmd, 1}, - {"unset", Tcl_UnsetObjCmd, TclCompileUnsetCmd, NULL, 1}, - {"uplevel", Tcl_UplevelObjCmd, NULL, TclNRUplevelObjCmd, 1}, - {"upvar", Tcl_UpvarObjCmd, TclCompileUpvarCmd, NULL, 1}, - {"variable", Tcl_VariableObjCmd, TclCompileVariableCmd, NULL, 1}, - {"while", Tcl_WhileObjCmd, TclCompileWhileCmd, TclNRWhileObjCmd, 1}, - {"yield", NULL, NULL, TclNRYieldObjCmd, 1}, - {"yieldto", NULL, NULL, TclNRYieldToObjCmd, 1}, + {"catch", Tcl_CatchObjCmd, TclCompileCatchCmd, TclNRCatchObjCmd, CMD_IS_SAFE}, + {"concat", Tcl_ConcatObjCmd, TclCompileConcatCmd, NULL, CMD_IS_SAFE}, + {"continue", Tcl_ContinueObjCmd, TclCompileContinueCmd, NULL, CMD_IS_SAFE}, + {"coroutine", NULL, NULL, TclNRCoroutineObjCmd, CMD_IS_SAFE}, + {"error", Tcl_ErrorObjCmd, TclCompileErrorCmd, NULL, CMD_IS_SAFE}, + {"eval", Tcl_EvalObjCmd, NULL, TclNREvalObjCmd, CMD_IS_SAFE}, + {"expr", Tcl_ExprObjCmd, TclCompileExprCmd, TclNRExprObjCmd, CMD_IS_SAFE}, + {"for", Tcl_ForObjCmd, TclCompileForCmd, TclNRForObjCmd, CMD_IS_SAFE}, + {"foreach", Tcl_ForeachObjCmd, TclCompileForeachCmd, TclNRForeachCmd, CMD_IS_SAFE}, + {"format", Tcl_FormatObjCmd, TclCompileFormatCmd, NULL, CMD_IS_SAFE}, + {"global", Tcl_GlobalObjCmd, TclCompileGlobalCmd, NULL, CMD_IS_SAFE}, + {"if", Tcl_IfObjCmd, TclCompileIfCmd, TclNRIfObjCmd, CMD_IS_SAFE}, + {"incr", Tcl_IncrObjCmd, TclCompileIncrCmd, NULL, CMD_IS_SAFE}, + {"join", Tcl_JoinObjCmd, NULL, NULL, CMD_IS_SAFE}, + {"lappend", Tcl_LappendObjCmd, TclCompileLappendCmd, NULL, CMD_IS_SAFE}, + {"lassign", Tcl_LassignObjCmd, TclCompileLassignCmd, NULL, CMD_IS_SAFE}, + {"lindex", Tcl_LindexObjCmd, TclCompileLindexCmd, NULL, CMD_IS_SAFE}, + {"linsert", Tcl_LinsertObjCmd, TclCompileLinsertCmd, NULL, CMD_IS_SAFE}, + {"list", Tcl_ListObjCmd, TclCompileListCmd, NULL, CMD_IS_SAFE|CMD_COMPILES_EXPANDED}, + {"llength", Tcl_LlengthObjCmd, TclCompileLlengthCmd, NULL, CMD_IS_SAFE}, + {"lmap", Tcl_LmapObjCmd, TclCompileLmapCmd, TclNRLmapCmd, CMD_IS_SAFE}, + {"lrange", Tcl_LrangeObjCmd, TclCompileLrangeCmd, NULL, CMD_IS_SAFE}, + {"lrepeat", Tcl_LrepeatObjCmd, NULL, NULL, CMD_IS_SAFE}, + {"lreplace", Tcl_LreplaceObjCmd, TclCompileLreplaceCmd, NULL, CMD_IS_SAFE}, + {"lreverse", Tcl_LreverseObjCmd, NULL, NULL, CMD_IS_SAFE}, + {"lsearch", Tcl_LsearchObjCmd, NULL, NULL, CMD_IS_SAFE}, + {"lset", Tcl_LsetObjCmd, TclCompileLsetCmd, NULL, CMD_IS_SAFE}, + {"lsort", Tcl_LsortObjCmd, NULL, NULL, CMD_IS_SAFE}, + {"package", Tcl_PackageObjCmd, NULL, NULL, CMD_IS_SAFE}, + {"proc", Tcl_ProcObjCmd, NULL, NULL, CMD_IS_SAFE}, + {"regexp", Tcl_RegexpObjCmd, TclCompileRegexpCmd, NULL, CMD_IS_SAFE}, + {"regsub", Tcl_RegsubObjCmd, TclCompileRegsubCmd, NULL, CMD_IS_SAFE}, + {"rename", Tcl_RenameObjCmd, NULL, NULL, CMD_IS_SAFE}, + {"return", Tcl_ReturnObjCmd, TclCompileReturnCmd, NULL, CMD_IS_SAFE}, + {"scan", Tcl_ScanObjCmd, NULL, NULL, CMD_IS_SAFE}, + {"set", Tcl_SetObjCmd, TclCompileSetCmd, NULL, CMD_IS_SAFE}, + {"split", Tcl_SplitObjCmd, NULL, NULL, CMD_IS_SAFE}, + {"subst", Tcl_SubstObjCmd, TclCompileSubstCmd, TclNRSubstObjCmd, CMD_IS_SAFE}, + {"switch", Tcl_SwitchObjCmd, TclCompileSwitchCmd, TclNRSwitchObjCmd, CMD_IS_SAFE}, + {"tailcall", NULL, TclCompileTailcallCmd, TclNRTailcallObjCmd, CMD_IS_SAFE}, + {"throw", Tcl_ThrowObjCmd, TclCompileThrowCmd, NULL, CMD_IS_SAFE}, + {"trace", Tcl_TraceObjCmd, NULL, NULL, CMD_IS_SAFE}, + {"try", Tcl_TryObjCmd, TclCompileTryCmd, TclNRTryObjCmd, CMD_IS_SAFE}, + {"unset", Tcl_UnsetObjCmd, TclCompileUnsetCmd, NULL, CMD_IS_SAFE}, + {"uplevel", Tcl_UplevelObjCmd, NULL, TclNRUplevelObjCmd, CMD_IS_SAFE}, + {"upvar", Tcl_UpvarObjCmd, TclCompileUpvarCmd, NULL, CMD_IS_SAFE}, + {"variable", Tcl_VariableObjCmd, TclCompileVariableCmd, NULL, CMD_IS_SAFE}, + {"while", Tcl_WhileObjCmd, TclCompileWhileCmd, TclNRWhileObjCmd, CMD_IS_SAFE}, + {"yield", NULL, TclCompileYieldCmd, TclNRYieldObjCmd, CMD_IS_SAFE}, + {"yieldto", NULL, TclCompileYieldToCmd, TclNRYieldToObjCmd, CMD_IS_SAFE}, /* * Commands in the OS-interface. Note that many of these are unsafe. */ - {"after", Tcl_AfterObjCmd, NULL, NULL, 1}, + {"after", Tcl_AfterObjCmd, NULL, NULL, CMD_IS_SAFE}, {"cd", Tcl_CdObjCmd, NULL, NULL, 0}, - {"close", Tcl_CloseObjCmd, NULL, NULL, 1}, - {"eof", Tcl_EofObjCmd, NULL, NULL, 1}, + {"close", Tcl_CloseObjCmd, NULL, NULL, CMD_IS_SAFE}, + {"eof", Tcl_EofObjCmd, NULL, NULL, CMD_IS_SAFE}, {"encoding", Tcl_EncodingObjCmd, NULL, NULL, 0}, {"exec", Tcl_ExecObjCmd, NULL, NULL, 0}, {"exit", Tcl_ExitObjCmd, NULL, NULL, 0}, - {"fblocked", Tcl_FblockedObjCmd, NULL, NULL, 1}, + {"fblocked", Tcl_FblockedObjCmd, NULL, NULL, CMD_IS_SAFE}, {"fconfigure", Tcl_FconfigureObjCmd, NULL, NULL, 0}, - {"fcopy", Tcl_FcopyObjCmd, NULL, NULL, 1}, - {"fileevent", Tcl_FileEventObjCmd, NULL, NULL, 1}, - {"flush", Tcl_FlushObjCmd, NULL, NULL, 1}, - {"gets", Tcl_GetsObjCmd, NULL, NULL, 1}, + {"fcopy", Tcl_FcopyObjCmd, NULL, NULL, CMD_IS_SAFE}, + {"fileevent", Tcl_FileEventObjCmd, NULL, NULL, CMD_IS_SAFE}, + {"flush", Tcl_FlushObjCmd, NULL, NULL, CMD_IS_SAFE}, + {"gets", Tcl_GetsObjCmd, NULL, NULL, CMD_IS_SAFE}, {"glob", Tcl_GlobObjCmd, NULL, NULL, 0}, {"load", Tcl_LoadObjCmd, NULL, NULL, 0}, {"open", Tcl_OpenObjCmd, NULL, NULL, 0}, - {"pid", Tcl_PidObjCmd, NULL, NULL, 1}, - {"puts", Tcl_PutsObjCmd, NULL, NULL, 1}, + {"pid", Tcl_PidObjCmd, NULL, NULL, CMD_IS_SAFE}, + {"puts", Tcl_PutsObjCmd, NULL, NULL, CMD_IS_SAFE}, {"pwd", Tcl_PwdObjCmd, NULL, NULL, 0}, - {"read", Tcl_ReadObjCmd, NULL, NULL, 1}, - {"seek", Tcl_SeekObjCmd, NULL, NULL, 1}, + {"read", Tcl_ReadObjCmd, NULL, NULL, CMD_IS_SAFE}, + {"seek", Tcl_SeekObjCmd, NULL, NULL, CMD_IS_SAFE}, {"socket", Tcl_SocketObjCmd, NULL, NULL, 0}, {"source", Tcl_SourceObjCmd, NULL, TclNRSourceObjCmd, 0}, - {"tell", Tcl_TellObjCmd, NULL, NULL, 1}, - {"time", Tcl_TimeObjCmd, NULL, NULL, 1}, + {"tell", Tcl_TellObjCmd, NULL, NULL, CMD_IS_SAFE}, + {"time", Tcl_TimeObjCmd, NULL, NULL, CMD_IS_SAFE}, {"unload", Tcl_UnloadObjCmd, NULL, NULL, 0}, - {"update", Tcl_UpdateObjCmd, NULL, NULL, 1}, - {"vwait", Tcl_VwaitObjCmd, NULL, NULL, 1}, + {"update", Tcl_UpdateObjCmd, NULL, NULL, CMD_IS_SAFE}, + {"vwait", Tcl_VwaitObjCmd, NULL, NULL, CMD_IS_SAFE}, {NULL, NULL, NULL, NULL, 0} }; @@ -485,6 +486,18 @@ Tcl_CreateInterp(void) Tcl_Panic("Tcl_CallFrame must not be smaller than CallFrame"); } +#if defined(_WIN32) && !defined(_WIN64) + if (sizeof(time_t) != 4) { + /*NOTREACHED*/ + Tcl_Panic("<time.h> is not compatible with MSVC"); + } + if ((TclOffset(Tcl_StatBuf,st_atime) != 32) + || (TclOffset(Tcl_StatBuf,st_ctime) != 40)) { + /*NOTREACHED*/ + Tcl_Panic("<sys/stat.h> is not compatible with MSVC"); + } +#endif + if (cancelTableInitialized == 0) { Tcl_MutexLock(&cancelLock); if (cancelTableInitialized == 0) { @@ -513,6 +526,9 @@ Tcl_CreateInterp(void) iPtr->hiddenCmdTablePtr = NULL; iPtr->interpInfo = NULL; + TCL_CT_ASSERT(sizeof(iPtr->extra) <= sizeof(Tcl_HashTable)); + iPtr->extra.optimizer = TclOptimizeBytecode; + iPtr->numLevels = 0; iPtr->maxNestingDepth = MAX_NESTING_DEPTH; iPtr->framePtr = NULL; /* Initialise as soon as :: is available */ @@ -772,6 +788,9 @@ Tcl_CreateInterp(void) cmdPtr->deleteProc = NULL; cmdPtr->deleteData = NULL; cmdPtr->flags = 0; + if (cmdInfoPtr->flags & CMD_COMPILES_EXPANDED) { + cmdPtr->flags |= CMD_COMPILES_EXPANDED; + } cmdPtr->importRefPtr = NULL; cmdPtr->tracePtr = NULL; cmdPtr->nreProc = cmdInfoPtr->nreProc; @@ -821,7 +840,9 @@ Tcl_CreateInterp(void) */ Tcl_CreateObjCommand(interp, "::tcl::unsupported::disassemble", - Tcl_DisassembleObjCmd, NULL, NULL); + Tcl_DisassembleObjCmd, INT2PTR(0), NULL); + Tcl_CreateObjCommand(interp, "::tcl::unsupported::getbytecode", + Tcl_DisassembleObjCmd, INT2PTR(1), NULL); Tcl_CreateObjCommand(interp, "::tcl::unsupported::representation", Tcl_RepresentationCmd, NULL, NULL); @@ -1004,7 +1025,7 @@ TclHideUnsafeCommands( return TCL_ERROR; } for (cmdInfoPtr = builtInCmds; cmdInfoPtr->name != NULL; cmdInfoPtr++) { - if (!cmdInfoPtr->isSafe) { + if (!(cmdInfoPtr->flags & CMD_IS_SAFE)) { Tcl_HideCommand(interp, cmdInfoPtr->name, cmdInfoPtr->name); } } @@ -1593,8 +1614,6 @@ DeleteInterpProc( ckfree(eclPtr->loc); } - Tcl_DeleteHashTable(&eclPtr->litInfo); - ckfree(eclPtr); Tcl_DeleteHashEntry(hPtr); } @@ -2068,10 +2087,19 @@ Tcl_CreateCommand( */ cmdPtr = Tcl_GetHashValue(hPtr); - oldRefPtr = cmdPtr->importRefPtr; - cmdPtr->importRefPtr = NULL; + cmdPtr->refCount++; + if (cmdPtr->importRefPtr) { + cmdPtr->flags |= CMD_REDEF_IN_PROGRESS; + } Tcl_DeleteCommandFromToken(interp, (Tcl_Command) cmdPtr); + + if (cmdPtr->flags & CMD_REDEF_IN_PROGRESS) { + oldRefPtr = cmdPtr->importRefPtr; + cmdPtr->importRefPtr = NULL; + } + TclCleanupCommandMacro(cmdPtr); + hPtr = Tcl_CreateHashEntry(&nsPtr->cmdTable, tail, &isNew); if (!isNew) { /* @@ -2160,12 +2188,9 @@ Tcl_CreateCommand( * future calls to Tcl_GetCommandName. * * Side effects: - * If no command named "cmdName" already exists for interp, one is - * created. Otherwise, if a command does exist, then if the object-based - * Tcl_ObjCmdProc is TclInvokeStringCommand, we assume Tcl_CreateCommand - * was called previously for the same command and just set its - * Tcl_ObjCmdProc to the argument "proc"; otherwise, we delete the old - * command. + * If a command named "cmdName" already exists for interp, it is + * first deleted. Then the new command is created from the arguments. + * [***] (See below for exception). * * In the future, during bytecode evaluation when "cmdName" is seen as * the name of a command by Tcl_EvalObj or Tcl_Eval, the object-based @@ -2232,17 +2257,22 @@ Tcl_CreateObjCommand( if (!isNew) { cmdPtr = Tcl_GetHashValue(hPtr); + /* Command already exists. */ + /* - * Command already exists. If its object-based Tcl_ObjCmdProc is - * TclInvokeStringCommand, we just set its Tcl_ObjCmdProc to the - * argument "proc". Otherwise, we delete the old command. + * [***] This is wrong. See Tcl Bug a16752c252. + * However, this buggy behavior is kept under particular + * circumstances to accommodate deployed binaries of the + * "tclcompiler" program. http://sourceforge.net/projects/tclpro/ + * that crash if the bug is fixed. */ - if (cmdPtr->objProc == TclInvokeStringCommand) { + if (cmdPtr->objProc == TclInvokeStringCommand + && cmdPtr->clientData == clientData + && cmdPtr->deleteData == clientData + && cmdPtr->deleteProc == deleteProc) { cmdPtr->objProc = proc; cmdPtr->objClientData = clientData; - cmdPtr->deleteProc = deleteProc; - cmdPtr->deleteData = clientData; return (Tcl_Command) cmdPtr; } @@ -2253,10 +2283,19 @@ Tcl_CreateObjCommand( * intact. */ - oldRefPtr = cmdPtr->importRefPtr; - cmdPtr->importRefPtr = NULL; + cmdPtr->refCount++; + if (cmdPtr->importRefPtr) { + cmdPtr->flags |= CMD_REDEF_IN_PROGRESS; + } Tcl_DeleteCommandFromToken(interp, (Tcl_Command) cmdPtr); + + if (cmdPtr->flags & CMD_REDEF_IN_PROGRESS) { + oldRefPtr = cmdPtr->importRefPtr; + cmdPtr->importRefPtr = NULL; + } + TclCleanupCommandMacro(cmdPtr); + hPtr = Tcl_CreateHashEntry(&nsPtr->cmdTable, tail, &isNew); if (!isNew) { /* @@ -2395,8 +2434,8 @@ TclInvokeStringCommand( * A standard Tcl string result value. * * Side effects: - * Besides those side effects of the called Tcl_CmdProc, - * TclInvokeStringCommand allocates and frees storage. + * Besides those side effects of the called Tcl_ObjCmdProc, + * TclInvokeObjectCommand allocates and frees storage. * *---------------------------------------------------------------------- */ @@ -3098,12 +3137,13 @@ Tcl_DeleteCommandFromToken( * commands were created that refer back to this command. Delete these * imported commands now. */ - - for (refPtr = cmdPtr->importRefPtr; refPtr != NULL; - refPtr = nextRefPtr) { - nextRefPtr = refPtr->nextPtr; - importCmd = (Tcl_Command) refPtr->importedCmdPtr; - Tcl_DeleteCommandFromToken(interp, importCmd); + if (!(cmdPtr->flags & CMD_REDEF_IN_PROGRESS)) { + for (refPtr = cmdPtr->importRefPtr; refPtr != NULL; + refPtr = nextRefPtr) { + nextRefPtr = refPtr->nextPtr; + importCmd = (Tcl_Command) refPtr->importedCmdPtr; + Tcl_DeleteCommandFromToken(interp, importCmd); + } } /* @@ -3339,66 +3379,6 @@ CancelEvalProc( /* *---------------------------------------------------------------------- * - * 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 @@ -3757,41 +3737,28 @@ Tcl_ListMathFuncs( Tcl_Interp *interp, const char *pattern) { - Namespace *globalNsPtr = (Namespace *) Tcl_GetGlobalNamespace(interp); - Namespace *nsPtr; - Namespace *dummy1NsPtr; - Namespace *dummy2NsPtr; - const char *dummyNamePtr; - Tcl_Obj *result = Tcl_NewObj(); - - TclGetNamespaceForQualName(interp, "::tcl::mathfunc", - globalNsPtr, TCL_FIND_ONLY_NS | TCL_GLOBAL_ONLY, - &nsPtr, &dummy1NsPtr, &dummy2NsPtr, &dummyNamePtr); - if (nsPtr == NULL) { - return result; + Tcl_Obj *script = Tcl_NewStringObj("::info functions ", -1); + Tcl_Obj *result; + Tcl_InterpState state; + + if (pattern) { + Tcl_Obj *patternObj = Tcl_NewStringObj(pattern, -1); + Tcl_Obj *arg = Tcl_NewListObj(1, &patternObj); + + Tcl_AppendObjToObj(script, arg); + Tcl_DecrRefCount(arg); /* Should tear down patternObj too */ } - if ((pattern != NULL) && TclMatchIsTrivial(pattern)) { - if (Tcl_FindHashEntry(&nsPtr->cmdTable, pattern) != NULL) { - Tcl_ListObjAppendElement(NULL, result, - Tcl_NewStringObj(pattern, -1)); - } + state = Tcl_SaveInterpState(interp, TCL_OK); + Tcl_IncrRefCount(script); + if (TCL_OK == Tcl_EvalObjEx(interp, script, 0)) { + result = Tcl_DuplicateObj(Tcl_GetObjResult(interp)); } else { - Tcl_HashSearch cmdHashSearch; - Tcl_HashEntry *cmdHashEntry = - Tcl_FirstHashEntry(&nsPtr->cmdTable,&cmdHashSearch); - - for (; cmdHashEntry != NULL; - cmdHashEntry = Tcl_NextHashEntry(&cmdHashSearch)) { - const char *cmdNamePtr = - Tcl_GetHashKey(&nsPtr->cmdTable, cmdHashEntry); - - if (pattern == NULL || Tcl_StringMatch(cmdNamePtr, pattern)) { - Tcl_ListObjAppendElement(NULL, result, - Tcl_NewStringObj(cmdNamePtr, -1)); - } - } + result = Tcl_NewObj(); } + Tcl_DecrRefCount(script); + Tcl_RestoreInterpState(interp, state); + return result; } @@ -4172,43 +4139,40 @@ TclNREvalObjv( * requested Command struct to be invoked. */ { Interp *iPtr = (Interp *) interp; - int result; - Namespace *lookupNsPtr = iPtr->lookupNsPtr; - Command **cmdPtrPtr; - - iPtr->lookupNsPtr = NULL; /* - * Push a callback with cleanup tasks for commands; the cmdPtr at data[0] - * will be filled later when the command is found: save its address at - * objProcPtr. - * * data[1] stores a marker for use by tailcalls; it will be set to 1 by - * command redirectors (imports, alias, ensembles) so that tailcalls - * finishes the source command and not just the target. + * command redirectors (imports, alias, ensembles) so that tailcall skips + * this callback (that marks the end of the target command) and goes back + * to the end of the source command. */ - if (iPtr->evalFlags & TCL_EVAL_REDIRECT) { - TclNRAddCallback(interp, NRCommand, NULL, INT2PTR(1), INT2PTR(objc), objv); - iPtr->evalFlags &= ~TCL_EVAL_REDIRECT; + if (iPtr->deferredCallbacks) { + iPtr->deferredCallbacks = NULL; } else { - TclNRAddCallback(interp, NRCommand, NULL, NULL, INT2PTR(objc), objv); + TclNRAddCallback(interp, NRCommand, NULL, NULL, NULL, NULL); } - cmdPtrPtr = (Command **) &(TOP_CB(interp)->data[0]); - - TclNRSpliceDeferred(interp); iPtr->numLevels++; - result = TclInterpReady(interp); - - if ((result != TCL_OK) || (objc == 0)) { - return result; - } - - if (cmdPtr) { - goto commandFound; - } + TclNRAddCallback(interp, EvalObjvCore, cmdPtr, INT2PTR(flags), + INT2PTR(objc), objv); + return TCL_OK; +} +static int +EvalObjvCore( + ClientData data[], + Tcl_Interp *interp, + int result) +{ + Command *cmdPtr = NULL, *preCmdPtr = data[0]; + int flags = PTR2INT(data[1]); + int objc = PTR2INT(data[2]); + Tcl_Obj **objv = data[3]; + Interp *iPtr = (Interp *) interp; + Namespace *lookupNsPtr = NULL; + int enterTracesDone = 0; + /* * Push records for task to be done on return, in INVERSE order. First, if * needed, the exception handlers (as they should happen last). @@ -4218,61 +4182,150 @@ TclNREvalObjv( TEOV_PushExceptionHandlers(interp, objc, objv, flags); } + if (TCL_OK != TclInterpReady(interp)) { + return TCL_ERROR; + } + + if (objc == 0) { + return TCL_OK; + } + + if (TclLimitExceeded(iPtr->limit)) { + return TCL_ERROR; + } + /* * Configure evaluation context to match the requested flags. */ - if ((flags & TCL_EVAL_INVOKE) || lookupNsPtr) { - if (!lookupNsPtr) { - lookupNsPtr = iPtr->globalNsPtr; - } + if (iPtr->lookupNsPtr) { + + /* + * Capture the namespace we should do command name resolution in, as + * instructed by our caller sneaking it in to us in a private interp + * field. Clear that field right away so we cannot possibly have its + * use leak where it should not. The sneaky message pass is done. + * + * Use of this mechanism overrides the TCL_EVAL_GLOBAL flag. + * TODO: Is that a bug? + */ + + lookupNsPtr = iPtr->lookupNsPtr; + iPtr->lookupNsPtr = NULL; + } else if (flags & TCL_EVAL_INVOKE) { + lookupNsPtr = iPtr->globalNsPtr; } else { - if (flags & TCL_EVAL_GLOBAL) { - TEOV_SwitchVarFrame(interp); - lookupNsPtr = iPtr->globalNsPtr; - } /* * TCL_EVAL_INVOKE was not set: clear rewrite rules */ iPtr->ensembleRewrite.sourceObjs = NULL; + + if (flags & TCL_EVAL_GLOBAL) { + TEOV_SwitchVarFrame(interp); + lookupNsPtr = iPtr->globalNsPtr; + } } /* - * Lookup the command + * Lookup the Command to dispatch. */ - cmdPtr = TEOV_LookupCmdFromObj(interp, objv[0], lookupNsPtr); - if (!cmdPtr) { - return TEOV_NotFound(interp, objc, objv, lookupNsPtr); + reresolve: + assert(cmdPtr == NULL); + if (preCmdPtr) { + /* Caller gave it to us */ + if (!(preCmdPtr->flags & CMD_IS_DELETED)) { + /* So long as it exists, use it. */ + cmdPtr = preCmdPtr; + } else if (flags & TCL_EVAL_NORESOLVE) { + /* + * When it's been deleted, and we're told not to attempt + * resolving it ourselves, all we can do is raise an error. + */ + Tcl_SetObjResult(interp, Tcl_ObjPrintf( + "attempt to invoke a deleted command")); + Tcl_SetErrorCode(interp, "TCL", "EVAL", "DELETEDCOMMAND", NULL); + return TCL_ERROR; + } } - - iPtr->cmdCount++; - if (TclLimitExceeded(iPtr->limit)) { - return TCL_ERROR; + if (cmdPtr == NULL) { + cmdPtr = TEOV_LookupCmdFromObj(interp, objv[0], lookupNsPtr); + if (!cmdPtr) { + return TEOV_NotFound(interp, objc, objv, lookupNsPtr); + } } - /* - * Found a command! The real work begins now ... - */ + if (enterTracesDone || iPtr->tracePtr + || (cmdPtr->flags & CMD_HAS_EXEC_TRACES)) { - commandFound: - if (iPtr->tracePtr || (cmdPtr->flags & CMD_HAS_EXEC_TRACES)) { - /* - * Call enter traces. They will schedule a call to the leave traces if - * necessary. - */ + Tcl_Obj *commandPtr = TclGetSourceFromFrame( + flags & TCL_EVAL_SOURCE_IN_FRAME ? iPtr->cmdFramePtr : NULL, + objc, objv); + Tcl_IncrRefCount(commandPtr); - result = TEOV_RunEnterTraces(interp, &cmdPtr, objc, objv, lookupNsPtr); - if (!cmdPtr) { - return TEOV_NotFound(interp, objc, objv, lookupNsPtr); - } - if (result != TCL_OK) { - return result; + if (!enterTracesDone) { + + int code = TEOV_RunEnterTraces(interp, &cmdPtr, commandPtr, + objc, objv); + + /* + * Send any exception from enter traces back as an exception + * raised by the traced command. + * TODO: Is this a bug? Letting an execution trace BREAK or + * CONTINUE or RETURN in the place of the traced command? + * Would either converting all exceptions to TCL_ERROR, or + * just swallowing them be better? (Swallowing them has the + * problem of permanently hiding program errors.) + */ + + if (code != TCL_OK) { + Tcl_DecrRefCount(commandPtr); + return code; + } + + /* + * If the enter traces made the resolved cmdPtr unusable, go + * back and resolve again, but next time don't run enter + * traces again. + */ + + if (cmdPtr == NULL) { + enterTracesDone = 1; + Tcl_DecrRefCount(commandPtr); + goto reresolve; + } } + + /* + * Schedule leave traces. Raise the refCount on the resolved + * cmdPtr, so that when it passes to the leave traces we know + * it's still valid. + */ + + cmdPtr->refCount++; + TclNRAddCallback(interp, TEOV_RunLeaveTraces, INT2PTR(objc), + commandPtr, cmdPtr, objv); } + TclNRAddCallback(interp, Dispatch, + cmdPtr->nreProc ? cmdPtr->nreProc : cmdPtr->objProc, + cmdPtr->objClientData, INT2PTR(objc), objv); + return TCL_OK; +} + +static int +Dispatch( + ClientData data[], + Tcl_Interp *interp, + int result) +{ + Tcl_ObjCmdProc *objProc = data[0]; + ClientData clientData = data[1]; + int objc = PTR2INT(data[2]); + Tcl_Obj **objv = data[3]; + Interp *iPtr = (Interp *) interp; #ifdef USE_DTRACE if (TCL_DTRACE_CMD_ARGS_ENABLED()) { @@ -4293,42 +4346,18 @@ TclNREvalObjv( TCL_DTRACE_CMD_INFO(a[0], a[1], a[2], a[3], i[0], i[1], a[4], a[5]); TclDecrRefCount(info); } - if (TCL_DTRACE_CMD_RETURN_ENABLED() || TCL_DTRACE_CMD_RESULT_ENABLED()) { + if ((TCL_DTRACE_CMD_RETURN_ENABLED() || TCL_DTRACE_CMD_RESULT_ENABLED()) + && objc) { TclNRAddCallback(interp, DTraceCmdReturn, objv[0], NULL, NULL, NULL); } - if (TCL_DTRACE_CMD_ENTRY_ENABLED()) { + if (TCL_DTRACE_CMD_ENTRY_ENABLED() && objc) { TCL_DTRACE_CMD_ENTRY(TclGetString(objv[0]), objc - 1, (Tcl_Obj **)(objv + 1)); } #endif /* USE_DTRACE */ - /* - * Fix the original callback to point to the now known cmdPtr. Insure that - * the Command struct lives until the command returns. - */ - - *cmdPtrPtr = cmdPtr; - cmdPtr->refCount++; - - /* - * Find the objProc to call: nreProc if available, objProc otherwise. Push - * a callback to do the actual running. - */ - if (cmdPtr->nreProc) { - TclNRAddCallback(interp, NRRunObjProc, cmdPtr, - INT2PTR(objc), (ClientData) objv, NULL); - return TCL_OK; - } else { - return cmdPtr->objProc(cmdPtr->objClientData, interp, objc, objv); - } -} - -void -TclPushTailcallPoint( - Tcl_Interp *interp) -{ - TclNRAddCallback(interp, NRCommand, NULL, NULL, NULL, NULL); - ((Interp *) interp)->numLevels++; + iPtr->cmdCount++; + return objProc(clientData, interp, objc, objv); } int @@ -4374,13 +4403,16 @@ NRCommand( int result) { Interp *iPtr = (Interp *) interp; - Command *cmdPtr = data[0]; - /* int cmdStart = PTR2INT(data[1]); NOT USED HERE */ - if (cmdPtr) { - TclCleanupCommandMacro(cmdPtr); + iPtr->numLevels--; + + /* + * If there is a tailcall, schedule it next + */ + + if (data[1] && (data[1] != INT2PTR(1))) { + TclNRAddCallback(interp, TclNRTailcallEval, data[1], NULL, NULL, NULL); } - ((Interp *)interp)->numLevels--; /* OPT ?? * Do not interrupt a series of cleanups with async or limit checks: @@ -4399,22 +4431,6 @@ NRCommand( return result; } - -static int -NRRunObjProc( - ClientData data[], - Tcl_Interp *interp, - int result) -{ - /* OPT: do not call? */ - - Command* cmdPtr = data[0]; - int objc = PTR2INT(data[1]); - Tcl_Obj **objv = data[2]; - - return cmdPtr->nreProc(cmdPtr->objClientData, interp, objc, objv); -} - /* *---------------------------------------------------------------------- @@ -4639,9 +4655,9 @@ TEOV_NotFound( savedNsPtr = varFramePtr->nsPtr; varFramePtr->nsPtr = lookupNsPtr; } - TclNRDeferCallback(interp, TEOV_NotFoundCallback, INT2PTR(handlerObjc), + TclSkipTailcall(interp); + TclNRAddCallback(interp, TEOV_NotFoundCallback, INT2PTR(handlerObjc), newObjv, savedNsPtr, NULL); - iPtr->evalFlags |= TCL_EVAL_REDIRECT; return TclNREvalObjv(interp, newObjc, newObjv, TCL_EVAL_NOERR, NULL); } @@ -4678,27 +4694,21 @@ static int TEOV_RunEnterTraces( Tcl_Interp *interp, Command **cmdPtrPtr, + Tcl_Obj *commandPtr, int objc, - Tcl_Obj *const objv[], - Namespace *lookupNsPtr) + Tcl_Obj *const objv[]) { 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); + int newEpoch, cmdEpoch = cmdPtr->cmdEpoch; + int length, traceCode = TCL_OK; + const char *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. + * command's reference count for the duration of the calling of the + * traces so that the structure doesn't go away underneath our feet. */ cmdPtr->refCount++; @@ -4713,29 +4723,22 @@ TEOV_RunEnterTraces( newEpoch = cmdPtr->cmdEpoch; TclCleanupCommandMacro(cmdPtr); - /* - * If the traces modified/deleted the command or any existing traces, they - * will update the command's epoch. We need to lookup again, but do not - * run enter traces on the newly found cmdPtr. - */ - - if (cmdEpoch != newEpoch) { - cmdPtr = TEOV_LookupCmdFromObj(interp, objv[0], lookupNsPtr); - *cmdPtrPtr = cmdPtr; + if (traceCode != TCL_OK) { + if (traceCode == TCL_ERROR) { + Tcl_Obj *info; + + TclNewLiteralStringObj(info, "\n (enter trace on \""); + Tcl_AppendLimitedToObj(info, command, length, 55, "..."); + Tcl_AppendToObj(info, "\")", 2); + Tcl_AppendObjToErrorInfo(interp, info); + iPtr->flags |= ERR_ALREADY_LOGGED; + } + return traceCode; } - - 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); + if (cmdEpoch != newEpoch) { + *cmdPtrPtr = NULL; } - return traceCode; + return TCL_OK; } static int @@ -4745,20 +4748,16 @@ TEOV_RunLeaveTraces( int result) { Interp *iPtr = (Interp *) interp; - const char *command; - int length, objc; - Tcl_Obj **objv; - int traceCode = PTR2INT(data[0]); + int traceCode = TCL_OK; + int objc = 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?"); - } + Tcl_Obj **objv = data[3]; + int length; + const char *command = Tcl_GetStringFromObj(commandPtr, &length); if (!(cmdPtr->flags & CMD_IS_DELETED)) { - if ((cmdPtr->flags & CMD_HAS_EXEC_TRACES) && traceCode == TCL_OK){ + if (cmdPtr->flags & CMD_HAS_EXEC_TRACES){ traceCode = TclCheckExecutionTraces(interp, command, length, cmdPtr, result, TCL_TRACE_LEAVE_EXEC, objc, objv); } @@ -4767,7 +4766,6 @@ TEOV_RunLeaveTraces( cmdPtr, result, TCL_TRACE_LEAVE_EXEC, objc, objv); } } - Tcl_DecrRefCount(commandPtr); /* * As cmdPtr is set, TclNRRunCallbacks is about to reduce the numlevels. @@ -4778,8 +4776,18 @@ TEOV_RunLeaveTraces( TclCleanupCommandMacro(cmdPtr); if (traceCode != TCL_OK) { - return traceCode; + if (traceCode == TCL_ERROR) { + Tcl_Obj *info; + + TclNewLiteralStringObj(info, "\n (leave trace on \""); + Tcl_AppendLimitedToObj(info, command, length, 55, "..."); + Tcl_AppendToObj(info, "\")", 2); + Tcl_AppendObjToErrorInfo(interp, info); + iPtr->flags |= ERR_ALREADY_LOGGED; + } + result = traceCode; } + Tcl_DecrRefCount(commandPtr); return result; } @@ -4795,7 +4803,6 @@ TEOV_LookupCmdFromObj( if (lookupNsPtr) { iPtr->varFramePtr->nsPtr = lookupNsPtr; - iPtr->lookupNsPtr = NULL; } cmdPtr = (Command *) Tcl_GetCommandFromObj(interp, namePtr); iPtr->varFramePtr->nsPtr = savedNsPtr; @@ -5014,31 +5021,22 @@ TclEvalEx( /* * 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. + * We 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; + eeFramePtr->cmdObj = 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) { + if (iPtr->evalFlags & TCL_EVAL_FILE) { /* * Set up for a sourced file. */ @@ -5081,7 +5079,9 @@ TclEvalEx( do { if (Tcl_ParseCommand(interp, p, bytesLeft, 0, parsePtr) != TCL_OK) { code = TCL_ERROR; - goto error; + Tcl_LogCommandInfo(interp, script, parsePtr->commandStart, + parsePtr->term + 1 - parsePtr->commandStart); + goto posterror; } /* @@ -5247,23 +5247,28 @@ TclEvalEx( * have been executed. */ - eeFramePtr->cmd.str.cmd = parsePtr->commandStart; - eeFramePtr->cmd.str.len = parsePtr->commandSize; + eeFramePtr->cmd = parsePtr->commandStart; + eeFramePtr->len = parsePtr->commandSize; if (parsePtr->term == parsePtr->commandStart + parsePtr->commandSize - 1) { - eeFramePtr->cmd.str.len--; + eeFramePtr->len--; } eeFramePtr->nline = objectsUsed; eeFramePtr->line = lines; TclArgumentEnter(interp, objv, objectsUsed, eeFramePtr); - code = Tcl_EvalObjv(interp, objectsUsed, objv, TCL_EVAL_NOERR); + code = Tcl_EvalObjv(interp, objectsUsed, objv, + TCL_EVAL_NOERR | TCL_EVAL_SOURCE_IN_FRAME); TclArgumentRelease(interp, objv, objectsUsed); eeFramePtr->line = NULL; eeFramePtr->nline = 0; + if (eeFramePtr->cmdObj) { + Tcl_DecrRefCount(eeFramePtr->cmdObj); + eeFramePtr->cmdObj = NULL; + } if (code != TCL_OK) { goto error; @@ -5337,6 +5342,7 @@ TclEvalEx( Tcl_LogCommandInfo(interp, script, parsePtr->commandStart, commandLength); } + posterror: iPtr->flags &= ~ERR_ALREADY_LOGGED; /* @@ -5611,76 +5617,88 @@ TclArgumentBCEnter( int objc, void *codePtr, CmdFrame *cfPtr, + int cmd, int pc) { + ExtCmdLoc *eclPtr; + int word; + ECL *ePtr; + CFWordBC *lastPtr = NULL; Interp *iPtr = (Interp *) interp; Tcl_HashEntry *hePtr = Tcl_FindHashEntry(iPtr->lineBCPtr, (char *) codePtr); - ExtCmdLoc *eclPtr; if (!hePtr) { return; } eclPtr = Tcl_GetHashValue(hePtr); - hePtr = Tcl_FindHashEntry(&eclPtr->litInfo, INT2PTR(pc)); - if (hePtr) { - int word; - int cmd = PTR2INT(Tcl_GetHashValue(hePtr)); - ECL *ePtr = &eclPtr->loc[cmd]; - CFWordBC *lastPtr = NULL; + ePtr = &eclPtr->loc[cmd]; - /* - * A few truths ... - * (1) ePtr->nline == objc - * (2) (ePtr->line[word] < 0) => !literal, for all words - * (3) (word == 0) => !literal - * - * Item (2) is why we can use objv to get the literals, and do not - * have to save them at compile time. - */ + /* + * ePtr->nline is the number of words originally parsed. + * + * objc is the number of elements getting invoked. + * + * If they are not the same, we arrived here by compiling an + * ensemble dispatch. Ensemble subcommands that lead to script + * evaluation are not supposed to get compiled, because a command + * such as [info level] in the script can expose some of the dispatch + * shenanigans. This means that we don't have to tend to the + * housekeeping, and can escape now. + */ + + if (ePtr->nline != objc) { + return; + } - if (ePtr->nline != objc) { - Tcl_Panic ("TIP 280 data structure inconsistency"); - } + /* + * Having disposed of the ensemble cases, we can state... + * A few truths ... + * (1) ePtr->nline == objc + * (2) (ePtr->line[word] < 0) => !literal, for all words + * (3) (word == 0) => !literal + * + * Item (2) is why we can use objv to get the literals, and do not + * have to save them at compile time. + */ - for (word = 1; word < objc; word++) { - if (ePtr->line[word] >= 0) { - int isnew; - Tcl_HashEntry *hPtr = Tcl_CreateHashEntry(iPtr->lineLABCPtr, - objv[word], &isnew); - CFWordBC *cfwPtr = ckalloc(sizeof(CFWordBC)); - - cfwPtr->framePtr = cfPtr; - cfwPtr->obj = objv[word]; - cfwPtr->pc = pc; - cfwPtr->word = word; - cfwPtr->nextPtr = lastPtr; - lastPtr = cfwPtr; - - if (isnew) { - /* - * The word is not on the stack yet, remember the current - * location and initialize references. - */ - - cfwPtr->prevPtr = NULL; - } else { - /* - * The object is already on the stack, however it may have - * a different location now (literal sharing may map - * multiple location to a single Tcl_Obj*. Save the old - * information in the new structure. - */ - - cfwPtr->prevPtr = Tcl_GetHashValue(hPtr); - } + for (word = 1; word < objc; word++) { + if (ePtr->line[word] >= 0) { + int isnew; + Tcl_HashEntry *hPtr = Tcl_CreateHashEntry(iPtr->lineLABCPtr, + objv[word], &isnew); + CFWordBC *cfwPtr = ckalloc(sizeof(CFWordBC)); + + cfwPtr->framePtr = cfPtr; + cfwPtr->obj = objv[word]; + cfwPtr->pc = pc; + cfwPtr->word = word; + cfwPtr->nextPtr = lastPtr; + lastPtr = cfwPtr; + + if (isnew) { + /* + * The word is not on the stack yet, remember the current + * location and initialize references. + */ - Tcl_SetHashValue(hPtr, cfwPtr); + cfwPtr->prevPtr = NULL; + } else { + /* + * The object is already on the stack, however it may have + * a different location now (literal sharing may map + * multiple location to a single Tcl_Obj*. Save the old + * information in the new structure. + */ + + cfwPtr->prevPtr = Tcl_GetHashValue(hPtr); } - } /* for */ - cfPtr->litarg = lastPtr; - } /* if */ + Tcl_SetHashValue(hPtr, cfwPtr); + } + } /* for */ + + cfPtr->litarg = lastPtr; } /* @@ -5828,6 +5846,7 @@ TclArgumentGet( *---------------------------------------------------------------------- */ +#undef Tcl_Eval int Tcl_Eval( Tcl_Interp *interp, /* Token for command interpreter (returned by @@ -5889,6 +5908,11 @@ Tcl_GlobalEvalObj( * compiled into bytecodes if necessary, unless TCL_EVAL_DIRECT is * specified. * + * If the flag TCL_EVAL_DIRECT is passed in, the value of invoker + * must be NULL. Support for non-NULL invokers in that mode has + * been removed since it was unused and untested. Failure to + * follow this limitation will lead to an assertion panic. + * * 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 @@ -5957,13 +5981,12 @@ TclNREvalObjEx( */ if (TclListObjIsCanonical(objPtr)) { - Tcl_Obj *listPtr = objPtr; CmdFrame *eoFramePtr = NULL; int objc; - Tcl_Obj **objv; + Tcl_Obj *listPtr, **objv; /* - * Pure List Optimization (no string representation). In this case, we + * Canonical List Optimization: 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 @@ -5971,11 +5994,6 @@ TclNREvalObjEx( * * 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). */ /* @@ -5984,13 +6002,13 @@ TclNREvalObjEx( * we always make a copy. The callback takes care od the refCounts for * both listPtr and objPtr. * + * TODO: Create a test to demo this need, or eliminate it. * FIXME OPT: preserve just the internal rep? */ Tcl_IncrRefCount(objPtr); listPtr = TclListObjCopy(interp, objPtr); Tcl_IncrRefCount(listPtr); - TclDecrRefCount(objPtr); if (word != INT_MIN) { /* @@ -6013,21 +6031,25 @@ TclNREvalObjEx( eoFramePtr->nline = 0; eoFramePtr->line = NULL; - eoFramePtr->type = TCL_LOCATION_EVAL_LIST; + eoFramePtr->type = TCL_LOCATION_EVAL; 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->cmdObj = objPtr; + eoFramePtr->cmd = NULL; + eoFramePtr->len = 0; eoFramePtr->data.eval.path = NULL; iPtr->cmdFramePtr = eoFramePtr; + + flags |= TCL_EVAL_SOURCE_IN_FRAME; } - TclNRDeferCallback(interp, TEOEx_ListCallback, listPtr, eoFramePtr, - NULL, NULL); + TclMarkTailcall(interp); + TclNRAddCallback(interp, TEOEx_ListCallback, listPtr, eoFramePtr, + objPtr, NULL); ListObjGetElements(listPtr, objc, objv); return TclNREvalObjv(interp, objc, objv, flags, NULL); @@ -6067,14 +6089,6 @@ TclNREvalObjEx( * 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; @@ -6098,92 +6112,19 @@ TclNREvalObjEx( */ 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. - */ + assert(invoker == NULL); - iPtr->invokeCmdFramePtr = ctxPtr; - iPtr->evalFlags |= TCL_EVAL_CTX; + iPtr->scriptCLLocPtr = TclContinuationsGet(objPtr); - result = TclEvalEx(interp, script, numSrcBytes, flags, - ctxPtr->line[word], NULL, script); - } - if (pc && (ctxPtr->type == TCL_LOCATION_SOURCE)) { - /* - * Death of SrcInfo reference. - */ + Tcl_IncrRefCount(objPtr); - Tcl_DecrRefCount(ctxPtr->data.eval.path); - } - TclStackFree(interp, ctxPtr); - } + script = Tcl_GetStringFromObj(objPtr, &numSrcBytes); + result = Tcl_EvalEx(interp, script, numSrcBytes, flags); - /* - * Now release the lock on the continuation line information, if any, - * and restore the caller's settings. - */ + TclDecrRefCount(objPtr); - if (iPtr->scriptCLLocPtr) { - Tcl_Release(iPtr->scriptCLLocPtr); - } iPtr->scriptCLLocPtr = saveCLLocPtr; - TclDecrRefCount(objPtr); return result; } } @@ -6243,6 +6184,7 @@ TEOEx_ListCallback( Interp *iPtr = (Interp *) interp; Tcl_Obj *listPtr = data[0]; CmdFrame *eoFramePtr = data[1]; + Tcl_Obj *objPtr = data[2]; /* * Remove the cmdFrame @@ -6252,6 +6194,7 @@ TEOEx_ListCallback( iPtr->cmdFramePtr = eoFramePtr->nextPtr; TclStackFree(interp, eoFramePtr); } + TclDecrRefCount(objPtr); TclDecrRefCount(listPtr); return result; @@ -6614,30 +6557,32 @@ TclObjInvoke( * TCL_INVOKE_HIDDEN, TCL_INVOKE_NO_UNKNOWN, * or TCL_INVOKE_NO_TRACEBACK. */ { - register Interp *iPtr = (Interp *) interp; - Tcl_HashTable *hTblPtr; /* Table of hidden commands. */ - const char *cmdName; /* Name of the command from objv[0]. */ - Tcl_HashEntry *hPtr = NULL; - Command *cmdPtr; - int result; - if (interp == NULL) { return TCL_ERROR; } - if ((objc < 1) || (objv == NULL)) { Tcl_SetObjResult(interp, Tcl_NewStringObj( "illegal argument vector", -1)); return TCL_ERROR; } - if ((flags & TCL_INVOKE_HIDDEN) == 0) { Tcl_Panic("TclObjInvoke: called without TCL_INVOKE_HIDDEN"); } + return Tcl_NRCallObjProc(interp, TclNRInvoke, NULL, objc, objv); +} - if (TclInterpReady(interp) == TCL_ERROR) { - return TCL_ERROR; - } +int +TclNRInvoke( + ClientData clientData, + Tcl_Interp *interp, + int objc, + Tcl_Obj *const objv[]) +{ + register Interp *iPtr = (Interp *) interp; + Tcl_HashTable *hTblPtr; /* Table of hidden commands. */ + const char *cmdName; /* Name of the command from objv[0]. */ + Tcl_HashEntry *hPtr = NULL; + Command *cmdPtr; cmdName = TclGetString(objv[0]); hTblPtr = iPtr->hiddenCmdTablePtr; @@ -6653,36 +6598,27 @@ TclObjInvoke( } cmdPtr = Tcl_GetHashValue(hPtr); - /* - * Invoke the command function. - */ - - iPtr->cmdCount++; - if (cmdPtr->objProc != NULL) { - result = cmdPtr->objProc(cmdPtr->objClientData, interp, objc, objv); - } else { - result = Tcl_NRCallObjProc(interp, cmdPtr->nreProc, - cmdPtr->objClientData, objc, objv); - } + /* Avoid the exception-handling brain damage when numLevels == 0 . */ + iPtr->numLevels++; + Tcl_NRAddCallback(interp, NRPostInvoke, NULL, NULL, NULL, NULL); /* - * If an error occurred, record information about what was being executed - * when the error occurred. + * Normal command resolution of objv[0] isn't going to find cmdPtr. + * That's the whole point of **hidden** commands. So tell the + * Eval core machinery not to even try (and risk finding something wrong). */ - if ((result == TCL_ERROR) - && ((flags & TCL_INVOKE_NO_TRACEBACK) == 0) - && ((iPtr->flags & ERR_ALREADY_LOGGED) == 0)) { - int length; - Tcl_Obj *command = Tcl_NewListObj(objc, objv); - const char *cmdString; + return TclNREvalObjv(interp, objc, objv, TCL_EVAL_NORESOLVE, cmdPtr); +} - Tcl_IncrRefCount(command); - cmdString = Tcl_GetStringFromObj(command, &length); - Tcl_LogCommandInfo(interp, cmdString, cmdString, length); - Tcl_DecrRefCount(command); - iPtr->flags &= ~ERR_ALREADY_LOGGED; - } +static int +NRPostInvoke( + ClientData clientData[], + Tcl_Interp *interp, + int result) +{ + Interp *iPtr = (Interp *)interp; + iPtr->numLevels--; return result; } @@ -6759,6 +6695,7 @@ Tcl_ExprString( *---------------------------------------------------------------------- */ +#undef Tcl_AddObjErrorInfo void Tcl_AppendObjToErrorInfo( Tcl_Interp *interp, /* Interpreter to which error information @@ -6792,6 +6729,7 @@ Tcl_AppendObjToErrorInfo( *---------------------------------------------------------------------- */ +#undef Tcl_AddErrorInfo void Tcl_AddErrorInfo( Tcl_Interp *interp, /* Interpreter to which error information @@ -6972,6 +6910,7 @@ Tcl_VarEval( *---------------------------------------------------------------------- */ +#undef Tcl_GlobalEval int Tcl_GlobalEval( Tcl_Interp *interp, /* Interpreter in which to evaluate @@ -7490,7 +7429,7 @@ ExprAbsFunc( return TCL_OK; } -#ifndef NO_WIDE_TYPE +#ifndef TCL_WIDE_INT_IS_LONG if (type == TCL_NUMBER_WIDE) { Tcl_WideInt w = *((const Tcl_WideInt *) ptr); @@ -8130,39 +8069,11 @@ Tcl_NRCallObjProc( int objc, Tcl_Obj *const objv[]) { - int result = TCL_OK; NRE_callback *rootPtr = TOP_CB(interp); -#ifdef USE_DTRACE - if (TCL_DTRACE_CMD_ARGS_ENABLED()) { - const char *a[10]; - int i = 0; - - while (i < 10) { - a[i] = i < objc ? TclGetString(objv[i]) : NULL; i++; - } - TCL_DTRACE_CMD_ARGS(a[0], a[1], a[2], a[3], a[4], a[5], a[6], a[7], - a[8], a[9]); - } - if (TCL_DTRACE_CMD_INFO_ENABLED() && ((Interp *) interp)->cmdFramePtr) { - Tcl_Obj *info = TclInfoFrame(interp, ((Interp *) interp)->cmdFramePtr); - const char *a[6]; int i[2]; - - TclDTraceInfo(info, a, i); - TCL_DTRACE_CMD_INFO(a[0], a[1], a[2], a[3], i[0], i[1], a[4], a[5]); - TclDecrRefCount(info); - } - if ((TCL_DTRACE_CMD_RETURN_ENABLED() || TCL_DTRACE_CMD_RESULT_ENABLED()) - && objc) { - TclNRAddCallback(interp, DTraceCmdReturn, objv[0], NULL, NULL, NULL); - } - if (TCL_DTRACE_CMD_ENTRY_ENABLED() && objc) { - TCL_DTRACE_CMD_ENTRY(TclGetString(objv[0]), objc - 1, - (Tcl_Obj **)(objv + 1)); - } -#endif /* USE_DTRACE */ - result = objProc(clientData, interp, objc, objv); - return TclNRRunCallbacks(interp, result, rootPtr); + TclNRAddCallback(interp, Dispatch, objProc, clientData, + INT2PTR(objc), objv); + return TclNRRunCallbacks(interp, TCL_OK, rootPtr); } /* @@ -8255,59 +8166,122 @@ Tcl_NRCmdSwap( Tcl_Obj *const objv[], int flags) { - return TclNREvalObjv(interp, objc, objv, flags, (Command *) cmd); + return TclNREvalObjv(interp, objc, objv, flags|TCL_EVAL_NOERR, + (Command *) cmd); } /***************************************************************************** - * Stuff for tailcalls + * Tailcall related code ***************************************************************************** * - * Just to show that IT CAN BE DONE! The precise semantics are not simple, - * require more thought. Possibly need a new Tcl return code to do it right? - * Questions include: - * (1) How is the objc/objv tailcall to be run? My current thinking is that - * it should essentially be - * [tailcall a b c] <=> [uplevel 1 [list a b c]] - * with two caveats - * (a) the current frame is dropped first, after running all pending - * cleanup tasks and saving its namespace - * (b) 'a' is looked up in the returning frame's namespace, but the - * command is run in the context to which we are returning - * Current implementation does this if [tailcall] is called from within - * a proc, errors otherwise. - * (2) Should a tailcall bypass [catch] in the returning frame? Current - * implementation does not (or does it? Changed, test!) - it causes an - * error. - * - * FIXME NRE! + * The steps of the tailcall dance are as follows: + * + * 1. when [tailcall] is invoked, it stores the corresponding callback in + * the current CallFrame and returns TCL_RETURN + * 2. when the CallFrame is popped, it calls TclSetTailcall to store the + * callback in the proper NRCommand callback - the spot where the command + * that pushed the CallFrame is completely cleaned up + * 3. when the NRCommand callback runs, it schedules the tailcall callback + * to run immediately after it returns + * + * One delicate point is to properly define the NRCommand where the tailcall + * will execute. There are functions whose purpose is to help define the + * precise spot: + * TclMarkTailcall: if the NEXT command to be pushed tailcalls, execution + * should continue right here + * TclSkipTailcall: if the NEXT command to be pushed tailcalls, execution + * should continue after the CURRENT command is fully returned ("skip + * the next command: we are redirecting to it, tailcalls should run + * after WE return") + * TclPushTailcallPoint: the search for a tailcalling spot cannot traverse + * this point. This is special for OO, as some of the oo constructs + * that behave like commands may not push an NRCommand callback. + */ + +void +TclMarkTailcall( + Tcl_Interp *interp) +{ + Interp *iPtr = (Interp *) interp; + + if (iPtr->deferredCallbacks == NULL) { + TclNRAddCallback(interp, NRCommand, NULL, NULL, + NULL, NULL); + iPtr->deferredCallbacks = TOP_CB(interp); + } +} + +void +TclSkipTailcall( + Tcl_Interp *interp) +{ + Interp *iPtr = (Interp *) interp; + + TclMarkTailcall(interp); + iPtr->deferredCallbacks->data[1] = INT2PTR(1); +} + +void +TclPushTailcallPoint( + Tcl_Interp *interp) +{ + TclNRAddCallback(interp, NRCommand, NULL, NULL, NULL, NULL); + ((Interp *) interp)->numLevels++; +} + + +/* + *---------------------------------------------------------------------- + * + * TclSetTailcall -- + * + * Splice a tailcall command in the proper spot of the NRE callback + * stack, so that it runs at the right time. + * + *---------------------------------------------------------------------- */ void -TclSpliceTailcall( +TclSetTailcall( Tcl_Interp *interp, - NRE_callback *tailcallPtr) + Tcl_Obj *listPtr) { /* * Find the splicing spot: right before the NRCommand of the thing - * being tailcalled. Note that we skip NRCommands marked in data[1] + * being tailcalled. Note that we skip NRCommands marked by a 1 in data[1] * (used by command redirectors). */ NRE_callback *runPtr; for (runPtr = TOP_CB(interp); runPtr; runPtr = runPtr->nextPtr) { - if (((runPtr->procPtr) == NRCommand) && !runPtr->data[1]) { + if (((runPtr->procPtr) == NRCommand) && !runPtr->data[1]) { break; } } if (!runPtr) { Tcl_Panic("tailcall cannot find the right splicing spot: should not happen!"); } - - tailcallPtr->nextPtr = runPtr->nextPtr; - runPtr->nextPtr = tailcallPtr; + runPtr->data[1] = listPtr; } + +/* + *---------------------------------------------------------------------- + * + * TclNRTailcallObjCmd -- + * + * Prepare the tailcall as a list and store it in the current + * varFrame. When the frame is later popped the tailcall will be spliced + * at the proper place. + * + * Results: + * The first NRCommand callback that is not marked to be skipped is + * updated so that its data[1] field contains the tailcall list. + * + *---------------------------------------------------------------------- + */ + int TclNRTailcallObjCmd( ClientData clientData, @@ -8322,9 +8296,9 @@ TclNRTailcallObjCmd( return TCL_ERROR; } - if (!iPtr->varFramePtr->isProcCallFrame) { /* or is upleveled */ + if (!(iPtr->varFramePtr->isProcCallFrame & 1)) { Tcl_SetObjResult(interp, Tcl_NewStringObj( - "tailcall can only be called from a proc or lambda", -1)); + "tailcall can only be called from a proc, lambda or method", -1)); Tcl_SetErrorCode(interp, "TCL", "TAILCALL", "ILLEGAL", NULL); return TCL_ERROR; } @@ -8335,55 +8309,64 @@ TclNRTailcallObjCmd( */ if (iPtr->varFramePtr->tailcallPtr) { - ClearTailcall(interp, iPtr->varFramePtr->tailcallPtr); + Tcl_DecrRefCount(iPtr->varFramePtr->tailcallPtr); iPtr->varFramePtr->tailcallPtr = NULL; } /* * Create the callback to actually evaluate the tailcalled * command, then set it in the varFrame so that PopCallFrame can use it - * at the proper time. Being lazy: exploit the TclNRAddCallBack macro to - * build the callback. + * at the proper time. */ if (objc > 1) { Tcl_Obj *listPtr, *nsObjPtr; Tcl_Namespace *nsPtr = (Tcl_Namespace *) iPtr->varFramePtr->nsPtr; Tcl_Namespace *ns1Ptr; - NRE_callback *tailcallPtr; - listPtr = Tcl_NewListObj(objc-1, objv+1); - Tcl_IncrRefCount(listPtr); + /* The tailcall data is in a Tcl list: the first element is the + * namespace, the rest the command to be tailcalled. */ + + listPtr = Tcl_NewListObj(objc, objv); nsObjPtr = Tcl_NewStringObj(nsPtr->fullName, -1); if ((TCL_OK != TclGetNamespaceFromObj(interp, nsObjPtr, &ns1Ptr)) || (nsPtr != ns1Ptr)) { Tcl_Panic("Tailcall failed to find the proper namespace"); } - Tcl_IncrRefCount(nsObjPtr); - - TclNRAddCallback(interp, NRTailcallEval, listPtr, nsObjPtr, - NULL, NULL); - tailcallPtr = TOP_CB(interp); - TOP_CB(interp) = tailcallPtr->nextPtr; - iPtr->varFramePtr->tailcallPtr = tailcallPtr; + TclListObjSetElement(interp, listPtr, 0, nsObjPtr); + + iPtr->varFramePtr->tailcallPtr = listPtr; } return TCL_RETURN; } + +/* + *---------------------------------------------------------------------- + * + * TclNRTailcallEval -- + * + * This NREcallback actually causes the tailcall to be evaluated. + * + *---------------------------------------------------------------------- + */ + int -NRTailcallEval( +TclNRTailcallEval( ClientData data[], Tcl_Interp *interp, int result) { Interp *iPtr = (Interp *) interp; - Tcl_Obj *listPtr = data[0]; - Tcl_Obj *nsObjPtr = data[1]; + Tcl_Obj *listPtr = data[0], *nsObjPtr; Tcl_Namespace *nsPtr; int objc; Tcl_Obj **objv; + Tcl_ListObjGetElements(interp, listPtr, &objc, &objv); + nsObjPtr = objv[0]; + if (result == TCL_OK) { result = TclGetNamespaceFromObj(interp, nsObjPtr, &nsPtr); } @@ -8402,10 +8385,10 @@ NRTailcallEval( * Perform the tailcall */ - TclNRDeferCallback(interp, TailcallCleanup, listPtr, nsObjPtr, NULL,NULL); + TclMarkTailcall(interp); + TclNRAddCallback(interp, TailcallCleanup, listPtr, NULL, NULL,NULL); iPtr->lookupNsPtr = (Namespace *) nsPtr; - ListObjGetElements(listPtr, objc, objv); - return TclNREvalObjv(interp, objc, objv, 0, NULL); + return TclNREvalObjv(interp, objc-1, objv+1, 0, NULL); } static int @@ -8415,19 +8398,9 @@ TailcallCleanup( int result) { Tcl_DecrRefCount((Tcl_Obj *) data[0]); - Tcl_DecrRefCount((Tcl_Obj *) data[1]); return result; } -static void -ClearTailcall( - Tcl_Interp *interp, - NRE_callback *tailcallPtr) -{ - TailcallCleanup(tailcallPtr->data, interp, TCL_OK); - TCLNR_FREE(interp, tailcallPtr); -} - void Tcl_NRAddCallback( @@ -8494,7 +8467,7 @@ TclNRYieldObjCmd( } NRE_ASSERT(!COR_IS_SUSPENDED(corPtr)); - TclNRAddCallback(interp, NRCoroutineActivateCallback, corPtr, + TclNRAddCallback(interp, TclNRCoroutineActivateCallback, corPtr, clientData, NULL, NULL); return TCL_OK; } @@ -8508,8 +8481,7 @@ TclNRYieldToObjCmd( { CoroutineData *corPtr = iPtr->execEnvPtr->corPtr; Tcl_Obj *listPtr, *nsObjPtr; - Tcl_Namespace *nsPtr = (Tcl_Namespace *) iPtr->varFramePtr->nsPtr; - Tcl_Namespace *ns1Ptr; + Tcl_Namespace *nsPtr = TclGetCurrentNamespace(interp); if (objc < 2) { Tcl_WrongNumArgs(interp, 1, objv, "command ?arg ...?"); @@ -8523,56 +8495,34 @@ TclNRYieldToObjCmd( return TCL_ERROR; } + if (((Namespace *) nsPtr)->flags & NS_DYING) { + Tcl_SetObjResult(interp, Tcl_NewStringObj( + "yieldto called in deleted namespace", -1)); + Tcl_SetErrorCode(interp, "TCL", "COROUTINE", "YIELDTO_IN_DELETED", + NULL); + return TCL_ERROR; + } + /* * Add the tailcall in the caller env, then just yield. * * This is essentially code from TclNRTailcallObjCmd */ - listPtr = Tcl_NewListObj(objc-1, objv+1); - Tcl_IncrRefCount(listPtr); - + listPtr = Tcl_NewListObj(objc, objv); nsObjPtr = Tcl_NewStringObj(nsPtr->fullName, -1); - if ((TCL_OK != TclGetNamespaceFromObj(interp, nsObjPtr, &ns1Ptr)) - || (nsPtr != ns1Ptr)) { - Tcl_Panic("yieldto failed to find the proper namespace"); - } - Tcl_IncrRefCount(nsObjPtr); + TclListObjSetElement(interp, listPtr, 0, nsObjPtr); /* * Add the callback in the caller's env, then instruct TEBC to yield. */ iPtr->execEnvPtr = corPtr->callerEEPtr; - TclNRAddCallback(interp, YieldToCallback, corPtr, listPtr, nsObjPtr, - NULL); + TclSetTailcall(interp, listPtr); iPtr->execEnvPtr = corPtr->eePtr; return TclNRYieldObjCmd(INT2PTR(CORO_ACTIVATE_YIELDM), interp, 1, objv); } - -static int -YieldToCallback( - ClientData data[], - Tcl_Interp *interp, - int result) -{ - /* CoroutineData *corPtr = data[0];*/ - Tcl_Obj *listPtr = data[1]; - ClientData nsPtr = data[2]; - NRE_callback *cbPtr; - - /* - * yieldTo: invoke the command using tailcall tech. - */ - - TclNRAddCallback(interp, NRTailcallEval, listPtr, nsPtr, NULL, NULL); - cbPtr = TOP_CB(interp); - TOP_CB(interp) = cbPtr->nextPtr; - - TclSpliceTailcall(interp, cbPtr); - return TCL_OK; -} static int RewindCoroutineCallback( @@ -8711,7 +8661,7 @@ NRCoroutineExitCallback( /* *---------------------------------------------------------------------- * - * NRCoroutineActivateCallback -- + * TclNRCoroutineActivateCallback -- * * This is the workhorse for coroutines: it implements both yield and * resume. @@ -8725,8 +8675,8 @@ NRCoroutineExitCallback( *---------------------------------------------------------------------- */ -static int -NRCoroutineActivateCallback( +int +TclNRCoroutineActivateCallback( ClientData data[], Tcl_Interp *interp, int result) @@ -8852,7 +8802,7 @@ NRCoroInjectObjCmd( return TCL_OK; } - + int TclNRInterpCoroutine( ClientData clientData, @@ -8901,7 +8851,7 @@ TclNRInterpCoroutine( break; } - TclNRAddCallback(interp, NRCoroutineActivateCallback, corPtr, + TclNRAddCallback(interp, TclNRCoroutineActivateCallback, corPtr, NULL, NULL, NULL); return TCL_OK; } @@ -9027,7 +8977,6 @@ TclNRCoroutineObjCmd( corPtr->running.lineLABCPtr = corPtr->lineLABCPtr; corPtr->stackLevel = NULL; corPtr->auxNumLevels = 0; - iPtr->numLevels--; /* * Create the coro's execEnv, switch to it to push the exit and coro @@ -9046,19 +8995,20 @@ TclNRCoroutineObjCmd( TclNRAddCallback(interp, NRCoroutineExitCallback, corPtr, NULL, NULL, NULL); + /* insure that the command is looked up in the correct namespace */ iPtr->lookupNsPtr = lookupNsPtr; Tcl_NREvalObj(interp, Tcl_NewListObj(objc-2, objv+2), 0); + iPtr->numLevels--; SAVE_CONTEXT(corPtr->running); RESTORE_CONTEXT(corPtr->caller); iPtr->execEnvPtr = corPtr->callerEEPtr; /* - * Now just resume the coroutine. Take care to insure that the command is - * looked up in the correct namespace. + * Now just resume the coroutine. */ - TclNRAddCallback(interp, NRCoroutineActivateCallback, corPtr, + TclNRAddCallback(interp, TclNRCoroutineActivateCallback, corPtr, NULL, NULL, NULL); return TCL_OK; } |