diff options
Diffstat (limited to 'generic/tclInterp.c')
| -rw-r--r-- | generic/tclInterp.c | 4537 |
1 files changed, 3449 insertions, 1088 deletions
diff --git a/generic/tclInterp.c b/generic/tclInterp.c index 851123d..0da5d47 100644 --- a/generic/tclInterp.c +++ b/generic/tclInterp.c @@ -1,65 +1,67 @@ -/* +/* * tclInterp.c -- * - * This file implements the "interp" command which allows creation - * and manipulation of Tcl interpreters from within Tcl scripts. + * This file implements the "interp" command which allows creation and + * manipulation of Tcl interpreters from within Tcl scripts. * * Copyright (c) 1995-1997 Sun Microsystems, Inc. + * Copyright (c) 2004 Donal K. Fellows * * See the file "license.terms" for information on usage and redistribution * of this file, and for a DISCLAIMER OF ALL WARRANTIES. - * - * RCS: @(#) $Id: tclInterp.c,v 1.20.2.2 2003/05/12 22:35:40 dgp Exp $ */ #include "tclInt.h" -#include "tclPort.h" -#include <stdio.h> - + /* - * Counter for how many aliases were created (global) + * A pointer to a string that holds an initialization script that if non-NULL + * is evaluated in Tcl_Init() prior to the built-in initialization script + * above. This variable can be modified by the function below. */ -static int aliasCounter = 0; -TCL_DECLARE_MUTEX(cntMutex) +static const char *tclPreInitScript = NULL; + +/* Forward declaration */ +struct Target; /* * struct Alias: * - * Stores information about an alias. Is stored in the slave interpreter - * and used by the source command to find the target command in the master - * when the source command is invoked. + * Stores information about an alias. Is stored in the slave interpreter and + * used by the source command to find the target command in the master when + * the source command is invoked. */ typedef struct Alias { - Tcl_Obj *namePtr; /* Name of alias command in slave interp. */ + Tcl_Obj *token; /* Token for the alias command in the slave + * interp. This used to be the command name in + * the slave when the alias was first + * created. */ Tcl_Interp *targetInterp; /* Interp in which target command will be * invoked. */ - Tcl_Command slaveCmd; /* Source command in slave interpreter, - * bound to command that invokes the target - * command in the target interpreter. */ + Tcl_Command slaveCmd; /* Source command in slave interpreter, bound + * to command that invokes the target command + * in the target interpreter. */ Tcl_HashEntry *aliasEntryPtr; /* Entry for the alias hash table in slave. - * This is used by alias deletion to remove - * the alias from the slave interpreter - * alias table. */ - Tcl_HashEntry *targetEntryPtr; - /* Entry for target command in master. - * This is used in the master interpreter to - * map back from the target command to aliases - * redirecting to it. Random access to this - * hash table is never required - we are using - * a hash table only for convenience. */ - int objc; /* Count of Tcl_Obj in the prefix of the - * target command to be invoked in the - * target interpreter. Additional arguments - * specified when calling the alias in the - * slave interp will be appended to the prefix - * before the command is invoked. */ - Tcl_Obj *objPtr; /* The first actual prefix object - the target - * command name; this has to be at the end of the - * structure, which will be extended to accomodate - * the remaining objects in the prefix. */ + * This is used by alias deletion to remove + * the alias from the slave interpreter alias + * table. */ + struct Target *targetPtr; /* Entry for target command in master. This is + * used in the master interpreter to map back + * from the target command to aliases + * redirecting to it. */ + int objc; /* Count of Tcl_Obj in the prefix of the + * target command to be invoked in the target + * interpreter. Additional arguments specified + * when calling the alias in the slave interp + * will be appended to the prefix before the + * command is invoked. */ + Tcl_Obj *objPtr; /* The first actual prefix object - the target + * command name; this has to be at the end of + * the structure, which will be extended to + * accomodate the remaining objects in the + * prefix. */ } Alias; /* @@ -67,23 +69,23 @@ typedef struct Alias { * struct Slave: * * Used by the "interp" command to record and find information about slave - * interpreters. Maps from a command name in the master to information about - * a slave interpreter, e.g. what aliases are defined in it. + * interpreters. Maps from a command name in the master to information about a + * slave interpreter, e.g. what aliases are defined in it. */ typedef struct Slave { Tcl_Interp *masterInterp; /* Master interpreter for this slave. */ Tcl_HashEntry *slaveEntryPtr; - /* Hash entry in masters slave table for - * this slave interpreter. Used to find - * this record, and used when deleting the - * slave interpreter to delete it from the - * master's table. */ + /* Hash entry in masters slave table for this + * slave interpreter. Used to find this + * record, and used when deleting the slave + * interpreter to delete it from the master's + * table. */ Tcl_Interp *slaveInterp; /* The slave interpreter. */ Tcl_Command interpCmd; /* Interpreter object command. */ - Tcl_HashTable aliasTable; /* Table which maps from names of commands - * in slave interpreter to struct Alias - * defined below. */ + Tcl_HashTable aliasTable; /* Table which maps from names of commands in + * slave interpreter to struct Alias defined + * below. */ } Slave; /* @@ -94,43 +96,47 @@ typedef struct Slave { * interpreters and must be deleted when the target interpreter is deleted. In * case they would not be deleted the source interpreter would be left with a * "dangling pointer". One such record is stored in the Master record of the - * master interpreter (in the targetTable hashtable, see below) with the - * master for each alias which directs to a command in the master. These - * records are used to remove the source command for an from a slave if/when - * the master is deleted. + * master interpreter with the master for each alias which directs to a + * command in the master. These records are used to remove the source command + * for an from a slave if/when the master is deleted. They are organized in a + * doubly-linked list attached to the master interpreter. */ typedef struct Target { Tcl_Command slaveCmd; /* Command for alias in slave interp. */ Tcl_Interp *slaveInterp; /* Slave Interpreter. */ + struct Target *nextPtr; /* Next in list of target records, or NULL if + * at the end of the list of targets. */ + struct Target *prevPtr; /* Previous in list of target records, or NULL + * if at the start of the list of targets. */ } Target; /* * struct Master: * - * This record is used for two purposes: First, slaveTable (a hashtable) - * maps from names of commands to slave interpreters. This hashtable is - * used to store information about slave interpreters of this interpreter, - * to map over all slaves, etc. The second purpose is to store information - * about all aliases in slaves (or siblings) which direct to target commands - * in this interpreter (using the targetTable hashtable). - * - * NB: the flags field in the interp structure, used with SAFE_INTERP - * mask denotes whether the interpreter is safe or not. Safe - * interpreters have restricted functionality, can only create safe slave - * interpreters and can only load safe extensions. + * This record is used for two purposes: First, slaveTable (a hashtable) maps + * from names of commands to slave interpreters. This hashtable is used to + * store information about slave interpreters of this interpreter, to map over + * all slaves, etc. The second purpose is to store information about all + * aliases in slaves (or siblings) which direct to target commands in this + * interpreter (using the targetsPtr doubly-linked list). + * + * NB: the flags field in the interp structure, used with SAFE_INTERP mask + * denotes whether the interpreter is safe or not. Safe interpreters have + * restricted functionality, can only create safe slave interpreters and can + * only load safe extensions. */ typedef struct Master { - Tcl_HashTable slaveTable; /* Hash table for slave interpreters. - * Maps from command names to Slave records. */ - Tcl_HashTable targetTable; /* Hash table for Target Records. Contains - * all Target records which denote aliases - * from slaves or sibling interpreters that - * direct to commands in this interpreter. This - * table is used to remove dangling pointers - * from the slave (or sibling) interpreters - * when this interpreter is deleted. */ + Tcl_HashTable slaveTable; /* Hash table for slave interpreters. Maps + * from command names to Slave records. */ + Target *targetsPtr; /* The head of a doubly-linked list of all the + * target records which denote aliases from + * slaves or sibling interpreters that direct + * to commands in this interpreter. This list + * is used to remove dangling pointers from + * the slave (or sibling) interpreters when + * this interpreter is deleted. */ } Master; /* @@ -146,67 +152,308 @@ typedef struct InterpInfo { } InterpInfo; /* - * Prototypes for local static procedures: + * Limit callbacks handled by scripts are modelled as structures which are + * stored in hashes indexed by a two-word key. Note that the type of the + * 'type' field in the key is not int; this is to make sure that things are + * likely to work properly on 64-bit architectures. + */ + +typedef struct ScriptLimitCallback { + Tcl_Interp *interp; /* The interpreter in which to execute the + * callback. */ + Tcl_Obj *scriptObj; /* The script to execute to perform the + * user-defined part of the callback. */ + int type; /* What kind of callback is this. */ + Tcl_HashEntry *entryPtr; /* The entry in the hash table maintained by + * the target interpreter that refers to this + * callback record, or NULL if the entry has + * already been deleted from that hash + * table. */ +} ScriptLimitCallback; + +typedef struct ScriptLimitCallbackKey { + Tcl_Interp *interp; /* The interpreter that the limit callback was + * attached to. This is not the interpreter + * that the callback runs in! */ + long type; /* The type of callback that this is. */ +} ScriptLimitCallbackKey; + +/* + * TIP#143 limit handler internal representation. + */ + +struct LimitHandler { + int flags; /* The state of this particular handler. */ + Tcl_LimitHandlerProc *handlerProc; + /* The handler callback. */ + ClientData clientData; /* Opaque argument to the handler callback. */ + Tcl_LimitHandlerDeleteProc *deleteProc; + /* How to delete the clientData. */ + LimitHandler *prevPtr; /* Previous item in linked list of + * handlers. */ + LimitHandler *nextPtr; /* Next item in linked list of handlers. */ +}; + +/* + * Values for the LimitHandler flags field. + * LIMIT_HANDLER_ACTIVE - Whether the handler is currently being + * processed; handlers are never to be entered reentrantly. + * LIMIT_HANDLER_DELETED - Whether the handler has been deleted. This + * should not normally be observed because when a handler is + * deleted it is also spliced out of the list of handlers, but + * even so we will be careful. */ -static int AliasCreate _ANSI_ARGS_((Tcl_Interp *interp, +#define LIMIT_HANDLER_ACTIVE 0x01 +#define LIMIT_HANDLER_DELETED 0x02 + + + +/* + * Prototypes for local static functions: + */ + +static int AliasCreate(Tcl_Interp *interp, Tcl_Interp *slaveInterp, Tcl_Interp *masterInterp, Tcl_Obj *namePtr, Tcl_Obj *targetPtr, int objc, - Tcl_Obj *CONST objv[])); -static int AliasDelete _ANSI_ARGS_((Tcl_Interp *interp, - Tcl_Interp *slaveInterp, Tcl_Obj *namePtr)); -static int AliasDescribe _ANSI_ARGS_((Tcl_Interp *interp, - Tcl_Interp *slaveInterp, Tcl_Obj *objPtr)); -static int AliasList _ANSI_ARGS_((Tcl_Interp *interp, - Tcl_Interp *slaveInterp)); -static int AliasObjCmd _ANSI_ARGS_((ClientData dummy, + Tcl_Obj *const objv[]); +static int AliasDelete(Tcl_Interp *interp, + Tcl_Interp *slaveInterp, Tcl_Obj *namePtr); +static int AliasDescribe(Tcl_Interp *interp, + Tcl_Interp *slaveInterp, Tcl_Obj *objPtr); +static int AliasList(Tcl_Interp *interp, Tcl_Interp *slaveInterp); +static int AliasObjCmd(ClientData dummy, Tcl_Interp *currentInterp, int objc, - Tcl_Obj *CONST objv[])); -static void AliasObjCmdDeleteProc _ANSI_ARGS_(( - ClientData clientData)); - -static Tcl_Interp * GetInterp _ANSI_ARGS_((Tcl_Interp *interp, - Tcl_Obj *pathPtr)); -static Tcl_Interp * GetInterp2 _ANSI_ARGS_((Tcl_Interp *interp, int objc, - Tcl_Obj *CONST objv[])); -static void InterpInfoDeleteProc _ANSI_ARGS_(( - ClientData clientData, Tcl_Interp *interp)); -static Tcl_Interp * SlaveCreate _ANSI_ARGS_((Tcl_Interp *interp, - Tcl_Obj *pathPtr, int safe)); -static int SlaveEval _ANSI_ARGS_((Tcl_Interp *interp, - Tcl_Interp *slaveInterp, int objc, - Tcl_Obj *CONST objv[])); -static int SlaveExpose _ANSI_ARGS_((Tcl_Interp *interp, + Tcl_Obj *const objv[]); +static int AliasNRCmd(ClientData dummy, + Tcl_Interp *currentInterp, int objc, + Tcl_Obj *const objv[]); +static void AliasObjCmdDeleteProc(ClientData clientData); +static Tcl_Interp * GetInterp(Tcl_Interp *interp, Tcl_Obj *pathPtr); +static Tcl_Interp * GetInterp2(Tcl_Interp *interp, int objc, + Tcl_Obj *const objv[]); +static void InterpInfoDeleteProc(ClientData clientData, + Tcl_Interp *interp); +static int SlaveBgerror(Tcl_Interp *interp, Tcl_Interp *slaveInterp, int objc, - Tcl_Obj *CONST objv[])); -static int SlaveHide _ANSI_ARGS_((Tcl_Interp *interp, + Tcl_Obj *const objv[]); +static Tcl_Interp * SlaveCreate(Tcl_Interp *interp, Tcl_Obj *pathPtr, + int safe); +static int SlaveDebugCmd(Tcl_Interp *interp, + Tcl_Interp *slaveInterp, + int objc, Tcl_Obj *const objv[]); +static int SlaveEval(Tcl_Interp *interp, Tcl_Interp *slaveInterp, + int objc, Tcl_Obj *const objv[]); +static int SlaveExpose(Tcl_Interp *interp, Tcl_Interp *slaveInterp, int objc, - Tcl_Obj *CONST objv[])); -static int SlaveHidden _ANSI_ARGS_((Tcl_Interp *interp, - Tcl_Interp *slaveInterp)); -static int SlaveInvokeHidden _ANSI_ARGS_((Tcl_Interp *interp, - Tcl_Interp *slaveInterp, int global, int objc, - Tcl_Obj *CONST objv[])); -static int SlaveMarkTrusted _ANSI_ARGS_((Tcl_Interp *interp, - Tcl_Interp *slaveInterp)); -static int SlaveObjCmd _ANSI_ARGS_((ClientData dummy, - Tcl_Interp *interp, int objc, - Tcl_Obj *CONST objv[])); -static void SlaveObjCmdDeleteProc _ANSI_ARGS_(( - ClientData clientData)); -static int SlaveRecursionLimit _ANSI_ARGS_((Tcl_Interp *interp, + Tcl_Obj *const objv[]); +static int SlaveHide(Tcl_Interp *interp, Tcl_Interp *slaveInterp, + int objc, Tcl_Obj *const objv[]); +static int SlaveHidden(Tcl_Interp *interp, + Tcl_Interp *slaveInterp); +static int SlaveInvokeHidden(Tcl_Interp *interp, + Tcl_Interp *slaveInterp, + const char *namespaceName, + int objc, Tcl_Obj *const objv[]); +static int SlaveMarkTrusted(Tcl_Interp *interp, + Tcl_Interp *slaveInterp); +static int SlaveObjCmd(ClientData dummy, Tcl_Interp *interp, + int objc, Tcl_Obj *const objv[]); +static void SlaveObjCmdDeleteProc(ClientData clientData); +static int SlaveRecursionLimit(Tcl_Interp *interp, Tcl_Interp *slaveInterp, int objc, - Tcl_Obj *CONST objv[])); + Tcl_Obj *const objv[]); +static int SlaveCommandLimitCmd(Tcl_Interp *interp, + Tcl_Interp *slaveInterp, int consumedObjc, + int objc, Tcl_Obj *const objv[]); +static int SlaveTimeLimitCmd(Tcl_Interp *interp, + Tcl_Interp *slaveInterp, int consumedObjc, + int objc, Tcl_Obj *const objv[]); +static void InheritLimitsFromMaster(Tcl_Interp *slaveInterp, + Tcl_Interp *masterInterp); +static void SetScriptLimitCallback(Tcl_Interp *interp, int type, + Tcl_Interp *targetInterp, Tcl_Obj *scriptObj); +static void CallScriptLimitCallback(ClientData clientData, + Tcl_Interp *interp); +static void DeleteScriptLimitCallback(ClientData clientData); +static void RunLimitHandlers(LimitHandler *handlerPtr, + Tcl_Interp *interp); +static void TimeLimitCallback(ClientData clientData); + +/* NRE enabling */ +static Tcl_NRPostProc NRPostInvokeHidden; +static Tcl_ObjCmdProc NRInterpCmd; +static Tcl_ObjCmdProc NRSlaveCmd; /* + *---------------------------------------------------------------------- + * + * TclSetPreInitScript -- + * + * This routine is used to change the value of the internal variable, + * tclPreInitScript. + * + * Results: + * Returns the current value of tclPreInitScript. + * + * Side effects: + * Changes the way Tcl_Init() routine behaves. + * + *---------------------------------------------------------------------- + */ + +const char * +TclSetPreInitScript( + const char *string) /* Pointer to a script. */ +{ + const char *prevString = tclPreInitScript; + tclPreInitScript = string; + return(prevString); +} + +/* + *---------------------------------------------------------------------- + * + * Tcl_Init -- + * + * This function is typically invoked by Tcl_AppInit functions to find + * and source the "init.tcl" script, which should exist somewhere on the + * Tcl library path. + * + * Results: + * Returns a standard Tcl completion code and sets the interp's result if + * there is an error. + * + * Side effects: + * Depends on what's in the init.tcl script. + * + *---------------------------------------------------------------------- + */ + +int +Tcl_Init( + Tcl_Interp *interp) /* Interpreter to initialize. */ +{ + if (tclPreInitScript != NULL) { + if (Tcl_Eval(interp, tclPreInitScript) == TCL_ERROR) { + return TCL_ERROR; + } + } + + /* + * In order to find init.tcl during initialization, the following script + * is invoked by Tcl_Init(). It looks in several different directories: + * + * $tcl_library - can specify a primary location, if set, no + * other locations will be checked. This is the + * recommended way for a program that embeds + * Tcl to specifically tell Tcl where to find + * an init.tcl file. + * + * $env(TCL_LIBRARY) - highest priority so user can always override + * the search path unless the application has + * specified an exact directory above + * + * $tclDefaultLibrary - INTERNAL: This variable is set by Tcl on + * those platforms where it can determine at + * runtime the directory where it expects the + * init.tcl file to be. After [tclInit] reads + * and uses this value, it [unset]s it. + * External users of Tcl should not make use of + * the variable to customize [tclInit]. + * + * $tcl_libPath - OBSOLETE: This variable is no longer set by + * Tcl itself, but [tclInit] examines it in + * case some program that embeds Tcl is + * customizing [tclInit] by setting this + * variable to a list of directories in which + * to search. + * + * [tcl::pkgconfig get scriptdir,runtime] + * - the directory determined by configure to be + * the place where Tcl's script library is to + * be installed. + * + * The first directory on this path that contains a valid init.tcl script + * will be set as the value of tcl_library. + * + * Note that this entire search mechanism can be bypassed by defining an + * alternate tclInit command before calling Tcl_Init(). + */ + + return Tcl_Eval(interp, +"if {[namespace which -command tclInit] eq \"\"} {\n" +" proc tclInit {} {\n" +" global tcl_libPath tcl_library env tclDefaultLibrary\n" +" rename tclInit {}\n" +" if {[info exists tcl_library]} {\n" +" set scripts {{set tcl_library}}\n" +" } else {\n" +" set scripts {}\n" +" if {[info exists env(TCL_LIBRARY)] && ($env(TCL_LIBRARY) ne {})} {\n" +" lappend scripts {set env(TCL_LIBRARY)}\n" +" lappend scripts {\n" +"if {[regexp ^tcl(.*)$ [file tail $env(TCL_LIBRARY)] -> tail] == 0} continue\n" +"if {$tail eq [info tclversion]} continue\n" +"file join [file dirname $env(TCL_LIBRARY)] tcl[info tclversion]}\n" +" }\n" +" if {[info exists tclDefaultLibrary]} {\n" +" lappend scripts {set tclDefaultLibrary}\n" +" } else {\n" +" lappend scripts {::tcl::pkgconfig get scriptdir,runtime}\n" +" }\n" +" lappend scripts {\n" +"set parentDir [file dirname [file dirname [info nameofexecutable]]]\n" +"set grandParentDir [file dirname $parentDir]\n" +"file join $parentDir lib tcl[info tclversion]} \\\n" +" {file join $grandParentDir lib tcl[info tclversion]} \\\n" +" {file join $parentDir library} \\\n" +" {file join $grandParentDir library} \\\n" +" {file join $grandParentDir tcl[info patchlevel] library} \\\n" +" {\n" +"file join [file dirname $grandParentDir] tcl[info patchlevel] library}\n" +" if {[info exists tcl_libPath]\n" +" && [catch {llength $tcl_libPath} len] == 0} {\n" +" for {set i 0} {$i < $len} {incr i} {\n" +" lappend scripts [list lindex \\$tcl_libPath $i]\n" +" }\n" +" }\n" +" }\n" +" set dirs {}\n" +" set errors {}\n" +" foreach script $scripts {\n" +" lappend dirs [eval $script]\n" +" set tcl_library [lindex $dirs end]\n" +" set tclfile [file join $tcl_library init.tcl]\n" +" if {[file exists $tclfile]} {\n" +" if {[catch {uplevel #0 [list source $tclfile]} msg opts]} {\n" +" append errors \"$tclfile: $msg\n\"\n" +" append errors \"[dict get $opts -errorinfo]\n\"\n" +" continue\n" +" }\n" +" unset -nocomplain tclDefaultLibrary\n" +" return\n" +" }\n" +" }\n" +" unset -nocomplain tclDefaultLibrary\n" +" set msg \"Can't find a usable init.tcl in the following directories: \n\"\n" +" append msg \" $dirs\n\n\"\n" +" append msg \"$errors\n\n\"\n" +" append msg \"This probably means that Tcl wasn't installed properly.\n\"\n" +" error $msg\n" +" }\n" +"}\n" +"tclInit"); +} + +/* *--------------------------------------------------------------------------- * * TclInterpInit -- * - * Initializes the invoking interpreter for using the master, slave - * and safe interp facilities. This is called from inside - * Tcl_CreateInterp(). + * Initializes the invoking interpreter for using the master, slave and + * safe interp facilities. This is called from inside Tcl_CreateInterp(). * * Results: * Always returns TCL_OK for backwards compatibility. @@ -219,19 +466,19 @@ static int SlaveRecursionLimit _ANSI_ARGS_((Tcl_Interp *interp, */ int -TclInterpInit(interp) - Tcl_Interp *interp; /* Interpreter to initialize. */ +TclInterpInit( + Tcl_Interp *interp) /* Interpreter to initialize. */ { InterpInfo *interpInfoPtr; Master *masterPtr; - Slave *slavePtr; + Slave *slavePtr; - interpInfoPtr = (InterpInfo *) ckalloc(sizeof(InterpInfo)); - ((Interp *) interp)->interpInfo = (ClientData) interpInfoPtr; + interpInfoPtr = ckalloc(sizeof(InterpInfo)); + ((Interp *) interp)->interpInfo = interpInfoPtr; masterPtr = &interpInfoPtr->master; Tcl_InitHashTable(&masterPtr->slaveTable, TCL_STRING_KEYS); - Tcl_InitHashTable(&masterPtr->targetTable, TCL_ONE_WORD_KEYS); + masterPtr->targetsPtr = NULL; slavePtr = &interpInfoPtr->slave; slavePtr->masterInterp = NULL; @@ -240,7 +487,8 @@ TclInterpInit(interp) slavePtr->interpCmd = NULL; Tcl_InitHashTable(&slavePtr->aliasTable, TCL_STRING_KEYS); - Tcl_CreateObjCommand(interp, "interp", Tcl_InterpObjCmd, NULL, NULL); + Tcl_NRCreateCommand(interp, "interp", Tcl_InterpObjCmd, NRInterpCmd, + NULL, NULL); Tcl_CallWhenDeleted(interp, InterpInfoDeleteProc, NULL); return TCL_OK; @@ -251,30 +499,27 @@ TclInterpInit(interp) * * InterpInfoDeleteProc -- * - * Invoked when an interpreter is being deleted. It releases all - * storage used by the master/slave/safe interpreter facilities. + * Invoked when an interpreter is being deleted. It releases all storage + * used by the master/slave/safe interpreter facilities. * * Results: * None. * * Side effects: - * Cleans up storage. Sets the interpInfoPtr field of the interp - * to NULL. + * Cleans up storage. Sets the interpInfoPtr field of the interp to NULL. * *--------------------------------------------------------------------------- */ static void -InterpInfoDeleteProc(clientData, interp) - ClientData clientData; /* Ignored. */ - Tcl_Interp *interp; /* Interp being deleted. All commands for +InterpInfoDeleteProc( + ClientData clientData, /* Ignored. */ + Tcl_Interp *interp) /* Interp being deleted. All commands for * slave interps should already be deleted. */ { InterpInfo *interpInfoPtr; Slave *slavePtr; Master *masterPtr; - Tcl_HashSearch hSearch; - Tcl_HashEntry *hPtr; Target *targetPtr; interpInfoPtr = (InterpInfo *) ((Interp *) interp)->interpInfo; @@ -285,36 +530,34 @@ InterpInfoDeleteProc(clientData, interp) masterPtr = &interpInfoPtr->master; if (masterPtr->slaveTable.numEntries != 0) { - panic("InterpInfoDeleteProc: still exist commands"); + Tcl_Panic("InterpInfoDeleteProc: still exist commands"); } Tcl_DeleteHashTable(&masterPtr->slaveTable); /* * Tell any interps that have aliases to this interp that they should - * delete those aliases. If the other interp was already dead, it - * would have removed the target record already. + * delete those aliases. If the other interp was already dead, it would + * have removed the target record already. */ - hPtr = Tcl_FirstHashEntry(&masterPtr->targetTable, &hSearch); - while (hPtr != NULL) { - targetPtr = (Target *) Tcl_GetHashValue(hPtr); + for (targetPtr = masterPtr->targetsPtr; targetPtr != NULL; ) { + Target *tmpPtr = targetPtr->nextPtr; Tcl_DeleteCommandFromToken(targetPtr->slaveInterp, targetPtr->slaveCmd); - hPtr = Tcl_NextHashEntry(&hSearch); + targetPtr = tmpPtr; } - Tcl_DeleteHashTable(&masterPtr->targetTable); slavePtr = &interpInfoPtr->slave; if (slavePtr->interpCmd != NULL) { /* - * Tcl_DeleteInterp() was called on this interpreter, rather - * "interp delete" or the equivalent deletion of the command in the - * master. First ensure that the cleanup callback doesn't try to - * delete the interp again. + * Tcl_DeleteInterp() was called on this interpreter, rather "interp + * delete" or the equivalent deletion of the command in the master. + * First ensure that the cleanup callback doesn't try to delete the + * interp again. */ slavePtr->slaveInterp = NULL; - Tcl_DeleteCommandFromToken(slavePtr->masterInterp, + Tcl_DeleteCommandFromToken(slavePtr->masterInterp, slavePtr->interpCmd); } @@ -323,11 +566,11 @@ InterpInfoDeleteProc(clientData, interp) */ if (slavePtr->aliasTable.numEntries != 0) { - panic("InterpInfoDeleteProc: still exist aliases"); + Tcl_Panic("InterpInfoDeleteProc: still exist aliases"); } Tcl_DeleteHashTable(&slavePtr->aliasTable); - ckfree((char *) interpInfoPtr); + ckfree(interpInfoPtr); } /* @@ -335,8 +578,8 @@ InterpInfoDeleteProc(clientData, interp) * * Tcl_InterpObjCmd -- * - * This procedure is invoked to process the "interp" Tcl command. - * See the user documentation for details on what it does. + * This function is invoked to process the "interp" Tcl command. See the + * user documentation for details on what it does. * * Results: * A standard Tcl result. @@ -348,430 +591,524 @@ InterpInfoDeleteProc(clientData, interp) */ /* ARGSUSED */ int -Tcl_InterpObjCmd(clientData, interp, objc, objv) - ClientData clientData; /* Unused. */ - Tcl_Interp *interp; /* Current interpreter. */ - int objc; /* Number of arguments. */ - Tcl_Obj *CONST objv[]; /* Argument objects. */ +Tcl_InterpObjCmd( + ClientData clientData, /* Unused. */ + Tcl_Interp *interp, /* Current interpreter. */ + int objc, /* Number of arguments. */ + Tcl_Obj *const objv[]) /* Argument objects. */ { + return Tcl_NRCallObjProc(interp, NRInterpCmd, clientData, objc, objv); +} + +static int +NRInterpCmd( + ClientData clientData, /* Unused. */ + Tcl_Interp *interp, /* Current interpreter. */ + int objc, /* Number of arguments. */ + Tcl_Obj *const objv[]) /* Argument objects. */ +{ + Tcl_Interp *slaveInterp; int index; - static CONST char *options[] = { - "alias", "aliases", "create", "delete", - "eval", "exists", "expose", "hide", - "hidden", "issafe", "invokehidden", "marktrusted", - "recursionlimit", "slaves", "share", - "target", "transfer", - NULL + static const char *const options[] = { + "alias", "aliases", "bgerror", "cancel", + "create", "debug", "delete", + "eval", "exists", "expose", + "hide", "hidden", "issafe", + "invokehidden", "limit", "marktrusted", "recursionlimit", + "slaves", "share", "target", "transfer", + NULL }; enum option { - OPT_ALIAS, OPT_ALIASES, OPT_CREATE, OPT_DELETE, - OPT_EVAL, OPT_EXISTS, OPT_EXPOSE, OPT_HIDE, - OPT_HIDDEN, OPT_ISSAFE, OPT_INVOKEHID, OPT_MARKTRUSTED, - OPT_RECLIMIT, OPT_SLAVES, OPT_SHARE, - OPT_TARGET, OPT_TRANSFER + OPT_ALIAS, OPT_ALIASES, OPT_BGERROR, OPT_CANCEL, + OPT_CREATE, OPT_DEBUG, OPT_DELETE, + OPT_EVAL, OPT_EXISTS, OPT_EXPOSE, + OPT_HIDE, OPT_HIDDEN, OPT_ISSAFE, + OPT_INVOKEHID, OPT_LIMIT, OPT_MARKTRUSTED,OPT_RECLIMIT, + OPT_SLAVES, OPT_SHARE, OPT_TARGET, OPT_TRANSFER }; - if (objc < 2) { - Tcl_WrongNumArgs(interp, 1, objv, "cmd ?arg ...?"); - return TCL_ERROR; + Tcl_WrongNumArgs(interp, 1, objv, "cmd ?arg ...?"); + return TCL_ERROR; } - if (Tcl_GetIndexFromObj(interp, objv[1], options, "option", 0, + if (Tcl_GetIndexFromObj(interp, objv[1], options, "option", 0, &index) != TCL_OK) { return TCL_ERROR; } switch ((enum option) index) { - case OPT_ALIAS: { - Tcl_Interp *slaveInterp, *masterInterp; + case OPT_ALIAS: { + Tcl_Interp *masterInterp; - if (objc < 4) { - aliasArgs: - Tcl_WrongNumArgs(interp, 2, objv, - "slavePath slaveCmd ?masterPath masterCmd? ?args ..?"); - return TCL_ERROR; - } - slaveInterp = GetInterp(interp, objv[2]); - if (slaveInterp == (Tcl_Interp *) NULL) { + if (objc < 4) { + aliasArgs: + Tcl_WrongNumArgs(interp, 2, objv, + "slavePath slaveCmd ?masterPath masterCmd? ?arg ...?"); + return TCL_ERROR; + } + slaveInterp = GetInterp(interp, objv[2]); + if (slaveInterp == NULL) { + return TCL_ERROR; + } + if (objc == 4) { + return AliasDescribe(interp, slaveInterp, objv[3]); + } + if ((objc == 5) && (TclGetString(objv[4])[0] == '\0')) { + return AliasDelete(interp, slaveInterp, objv[3]); + } + if (objc > 5) { + masterInterp = GetInterp(interp, objv[4]); + if (masterInterp == NULL) { return TCL_ERROR; } - if (objc == 4) { - return AliasDescribe(interp, slaveInterp, objv[3]); - } - if ((objc == 5) && (Tcl_GetString(objv[4])[0] == '\0')) { - return AliasDelete(interp, slaveInterp, objv[3]); - } - if (objc > 5) { - masterInterp = GetInterp(interp, objv[4]); - if (masterInterp == (Tcl_Interp *) NULL) { - return TCL_ERROR; - } - if (Tcl_GetString(objv[5])[0] == '\0') { - if (objc == 6) { - return AliasDelete(interp, slaveInterp, objv[3]); - } - } else { - return AliasCreate(interp, slaveInterp, masterInterp, - objv[3], objv[5], objc - 6, objv + 6); + if (TclGetString(objv[5])[0] == '\0') { + if (objc == 6) { + return AliasDelete(interp, slaveInterp, objv[3]); } + } else { + return AliasCreate(interp, slaveInterp, masterInterp, objv[3], + objv[5], objc - 6, objv + 6); } - goto aliasArgs; } - case OPT_ALIASES: { - Tcl_Interp *slaveInterp; - - slaveInterp = GetInterp2(interp, objc, objv); - if (slaveInterp == NULL) { + goto aliasArgs; + } + case OPT_ALIASES: + slaveInterp = GetInterp2(interp, objc, objv); + if (slaveInterp == NULL) { + return TCL_ERROR; + } + return AliasList(interp, slaveInterp); + case OPT_BGERROR: + if (objc != 3 && objc != 4) { + Tcl_WrongNumArgs(interp, 2, objv, "path ?cmdPrefix?"); + return TCL_ERROR; + } + slaveInterp = GetInterp(interp, objv[2]); + if (slaveInterp == NULL) { + return TCL_ERROR; + } + return SlaveBgerror(interp, slaveInterp, objc - 3, objv + 3); + case OPT_CANCEL: { + int i, flags; + Tcl_Obj *resultObjPtr; + static const char *const cancelOptions[] = { + "-unwind", "--", NULL + }; + enum option { + OPT_UNWIND, OPT_LAST + }; + + flags = 0; + + for (i = 2; i < objc; i++) { + if (TclGetString(objv[i])[0] != '-') { + break; + } + if (Tcl_GetIndexFromObj(interp, objv[i], cancelOptions, "option", + 0, &index) != TCL_OK) { return TCL_ERROR; } - return AliasList(interp, slaveInterp); - } - case OPT_CREATE: { - int i, last, safe; - Tcl_Obj *slavePtr; - char buf[16 + TCL_INTEGER_SPACE]; - static CONST char *options[] = { - "-safe", "--", NULL - }; - enum option { - OPT_SAFE, OPT_LAST - }; - - safe = Tcl_IsSafe(interp); - - /* - * Weird historical rules: "-safe" is accepted at the end, too. - */ - slavePtr = NULL; - last = 0; - for (i = 2; i < objc; i++) { - if ((last == 0) && (Tcl_GetString(objv[i])[0] == '-')) { - if (Tcl_GetIndexFromObj(interp, objv[i], options, "option", - 0, &index) != TCL_OK) { - return TCL_ERROR; - } - if (index == OPT_SAFE) { - safe = 1; - continue; - } - i++; - last = 1; - } - if (slavePtr != NULL) { - Tcl_WrongNumArgs(interp, 2, objv, "?-safe? ?--? ?path?"); - return TCL_ERROR; - } - if (i < objc) { - slavePtr = objv[i]; - } - } - buf[0] = '\0'; - if (slavePtr == NULL) { + switch ((enum option) index) { + case OPT_UNWIND: /* - * Create an anonymous interpreter -- we choose its name and - * the name of the command. We check that the command name - * that we use for the interpreter does not collide with an - * existing command in the master interpreter. + * The evaluation stack in the target interp is to be unwound. */ - - for (i = 0; ; i++) { - Tcl_CmdInfo cmdInfo; - - sprintf(buf, "interp%d", i); - if (Tcl_GetCommandInfo(interp, buf, &cmdInfo) == 0) { - break; - } - } - slavePtr = Tcl_NewStringObj(buf, -1); - } - if (SlaveCreate(interp, slavePtr, safe) == NULL) { - if (buf[0] != '\0') { - Tcl_DecrRefCount(slavePtr); - } - return TCL_ERROR; - } - Tcl_SetObjResult(interp, slavePtr); - return TCL_OK; - } - case OPT_DELETE: { - int i; - InterpInfo *iiPtr; - Tcl_Interp *slaveInterp; - - for (i = 2; i < objc; i++) { - slaveInterp = GetInterp(interp, objv[i]); - if (slaveInterp == NULL) { - return TCL_ERROR; - } else if (slaveInterp == interp) { - Tcl_ResetResult(interp); - Tcl_AppendStringsToObj(Tcl_GetObjResult(interp), - "cannot delete the current interpreter", - (char *) NULL); - return TCL_ERROR; - } - iiPtr = (InterpInfo *) ((Interp *) slaveInterp)->interpInfo; - Tcl_DeleteCommandFromToken(iiPtr->slave.masterInterp, - iiPtr->slave.interpCmd); - } - return TCL_OK; - } - case OPT_EVAL: { - Tcl_Interp *slaveInterp; - if (objc < 4) { - Tcl_WrongNumArgs(interp, 2, objv, "path arg ?arg ...?"); - return TCL_ERROR; + flags |= TCL_CANCEL_UNWIND; + break; + case OPT_LAST: + i++; + goto endOfForLoop; } - slaveInterp = GetInterp(interp, objv[2]); - if (slaveInterp == NULL) { - return TCL_ERROR; - } - return SlaveEval(interp, slaveInterp, objc - 3, objv + 3); } - case OPT_EXISTS: { - int exists; - Tcl_Interp *slaveInterp; - exists = 1; - slaveInterp = GetInterp2(interp, objc, objv); - if (slaveInterp == NULL) { - if (objc > 3) { - return TCL_ERROR; - } - Tcl_ResetResult(interp); - exists = 0; - } - Tcl_SetIntObj(Tcl_GetObjResult(interp), exists); - return TCL_OK; + endOfForLoop: + if ((i + 2) < objc) { + Tcl_WrongNumArgs(interp, 2, objv, + "?-unwind? ?--? ?path? ?result?"); + return TCL_ERROR; } - case OPT_EXPOSE: { - Tcl_Interp *slaveInterp; - if ((objc < 4) || (objc > 5)) { - Tcl_WrongNumArgs(interp, 2, objv, - "path hiddenCmdName ?cmdName?"); - return TCL_ERROR; - } - slaveInterp = GetInterp(interp, objv[2]); + /* + * Did they specify a slave interp to cancel the script in progress + * in? If not, use the current interp. + */ + + if (i < objc) { + slaveInterp = GetInterp(interp, objv[i]); if (slaveInterp == NULL) { return TCL_ERROR; } - return SlaveExpose(interp, slaveInterp, objc - 3, objv + 3); + i++; + } else { + slaveInterp = interp; } - case OPT_HIDE: { - Tcl_Interp *slaveInterp; /* A slave. */ - if ((objc < 4) || (objc > 5)) { - Tcl_WrongNumArgs(interp, 2, objv, - "path cmdName ?hiddenCmdName?"); - return TCL_ERROR; - } - slaveInterp = GetInterp(interp, objv[2]); - if (slaveInterp == (Tcl_Interp *) NULL) { - return TCL_ERROR; - } - return SlaveHide(interp, slaveInterp, objc - 3, objv + 3); - } - case OPT_HIDDEN: { - Tcl_Interp *slaveInterp; /* A slave. */ + if (i < objc) { + resultObjPtr = objv[i]; - slaveInterp = GetInterp2(interp, objc, objv); - if (slaveInterp == NULL) { - return TCL_ERROR; - } - return SlaveHidden(interp, slaveInterp); - } - case OPT_ISSAFE: { - Tcl_Interp *slaveInterp; + /* + * Tcl_CancelEval removes this reference. + */ - slaveInterp = GetInterp2(interp, objc, objv); - if (slaveInterp == NULL) { - return TCL_ERROR; - } - Tcl_SetIntObj(Tcl_GetObjResult(interp), Tcl_IsSafe(slaveInterp)); - return TCL_OK; + Tcl_IncrRefCount(resultObjPtr); + i++; + } else { + resultObjPtr = NULL; } - case OPT_INVOKEHID: { - int i, index, global; - Tcl_Interp *slaveInterp; - static CONST char *hiddenOptions[] = { - "-global", "--", NULL - }; - enum hiddenOption { - OPT_GLOBAL, OPT_LAST - }; - - global = 0; - for (i = 3; i < objc; i++) { - if (Tcl_GetString(objv[i])[0] != '-') { - break; - } - if (Tcl_GetIndexFromObj(interp, objv[i], hiddenOptions, + + return Tcl_CancelEval(slaveInterp, resultObjPtr, 0, flags); + } + case OPT_CREATE: { + int i, last, safe; + Tcl_Obj *slavePtr; + char buf[16 + TCL_INTEGER_SPACE]; + static const char *const createOptions[] = { + "-safe", "--", NULL + }; + enum option { + OPT_SAFE, OPT_LAST + }; + + safe = Tcl_IsSafe(interp); + + /* + * Weird historical rules: "-safe" is accepted at the end, too. + */ + + slavePtr = NULL; + last = 0; + for (i = 2; i < objc; i++) { + if ((last == 0) && (Tcl_GetString(objv[i])[0] == '-')) { + if (Tcl_GetIndexFromObj(interp, objv[i], createOptions, "option", 0, &index) != TCL_OK) { return TCL_ERROR; } - if (index == OPT_GLOBAL) { - global = 1; - } else { - i++; - break; + if (index == OPT_SAFE) { + safe = 1; + continue; } + i++; + last = 1; } - if (objc - i < 1) { - Tcl_WrongNumArgs(interp, 2, objv, - "path ?-global? ?--? cmd ?arg ..?"); + if (slavePtr != NULL) { + Tcl_WrongNumArgs(interp, 2, objv, "?-safe? ?--? ?path?"); return TCL_ERROR; } - slaveInterp = GetInterp(interp, objv[2]); - if (slaveInterp == (Tcl_Interp *) NULL) { - return TCL_ERROR; + if (i < objc) { + slavePtr = objv[i]; } - return SlaveInvokeHidden(interp, slaveInterp, global, objc - i, - objv + i); } - case OPT_MARKTRUSTED: { - Tcl_Interp *slaveInterp; + buf[0] = '\0'; + if (slavePtr == NULL) { + /* + * Create an anonymous interpreter -- we choose its name and the + * name of the command. We check that the command name that we use + * for the interpreter does not collide with an existing command + * in the master interpreter. + */ - if (objc != 3) { - Tcl_WrongNumArgs(interp, 2, objv, "path"); - return TCL_ERROR; + for (i = 0; ; i++) { + Tcl_CmdInfo cmdInfo; + + sprintf(buf, "interp%d", i); + if (Tcl_GetCommandInfo(interp, buf, &cmdInfo) == 0) { + break; + } } - slaveInterp = GetInterp(interp, objv[2]); - if (slaveInterp == NULL) { - return TCL_ERROR; + slavePtr = Tcl_NewStringObj(buf, -1); + } + if (SlaveCreate(interp, slavePtr, safe) == NULL) { + if (buf[0] != '\0') { + Tcl_DecrRefCount(slavePtr); } - return SlaveMarkTrusted(interp, slaveInterp); + return TCL_ERROR; } - case OPT_RECLIMIT: { - Tcl_Interp *slaveInterp; + Tcl_SetObjResult(interp, slavePtr); + return TCL_OK; + } + case OPT_DEBUG: /* TIP #378 */ + /* + * Currently only -frame supported, otherwise ?-option ?value?? + */ - if (objc != 3 && objc != 4) { - Tcl_WrongNumArgs(interp, 2, objv, "path ?newlimit?"); - return TCL_ERROR; - } - slaveInterp = GetInterp(interp, objv[2]); + if (objc < 3 || objc > 5) { + Tcl_WrongNumArgs(interp, 2, objv, "path ?-frame ?bool??"); + return TCL_ERROR; + } + slaveInterp = GetInterp(interp, objv[2]); + if (slaveInterp == NULL) { + return TCL_ERROR; + } + return SlaveDebugCmd(interp, slaveInterp, objc - 3, objv + 3); + case OPT_DELETE: { + int i; + InterpInfo *iiPtr; + + for (i = 2; i < objc; i++) { + slaveInterp = GetInterp(interp, objv[i]); if (slaveInterp == NULL) { return TCL_ERROR; - } - return SlaveRecursionLimit(interp, slaveInterp, objc - 3, objv + 3); - } - case OPT_SLAVES: { - Tcl_Interp *slaveInterp; - InterpInfo *iiPtr; - Tcl_Obj *resultPtr; - Tcl_HashEntry *hPtr; - Tcl_HashSearch hashSearch; - char *string; - - slaveInterp = GetInterp2(interp, objc, objv); - if (slaveInterp == NULL) { + } else if (slaveInterp == interp) { + Tcl_SetObjResult(interp, Tcl_NewStringObj( + "cannot delete the current interpreter", -1)); + Tcl_SetErrorCode(interp, "TCL", "OPERATION", "INTERP", + "DELETESELF", NULL); return TCL_ERROR; } iiPtr = (InterpInfo *) ((Interp *) slaveInterp)->interpInfo; - resultPtr = Tcl_GetObjResult(interp); - hPtr = Tcl_FirstHashEntry(&iiPtr->master.slaveTable, &hashSearch); - for ( ; hPtr != NULL; hPtr = Tcl_NextHashEntry(&hashSearch)) { - string = Tcl_GetHashKey(&iiPtr->master.slaveTable, hPtr); - Tcl_ListObjAppendElement(NULL, resultPtr, - Tcl_NewStringObj(string, -1)); - } - return TCL_OK; + Tcl_DeleteCommandFromToken(iiPtr->slave.masterInterp, + iiPtr->slave.interpCmd); } - case OPT_SHARE: { - Tcl_Interp *slaveInterp; /* A slave. */ - Tcl_Interp *masterInterp; /* Its master. */ - Tcl_Channel chan; + return TCL_OK; + } + case OPT_EVAL: + if (objc < 4) { + Tcl_WrongNumArgs(interp, 2, objv, "path arg ?arg ...?"); + return TCL_ERROR; + } + slaveInterp = GetInterp(interp, objv[2]); + if (slaveInterp == NULL) { + return TCL_ERROR; + } + return SlaveEval(interp, slaveInterp, objc - 3, objv + 3); + case OPT_EXISTS: { + int exists = 1; - if (objc != 5) { - Tcl_WrongNumArgs(interp, 2, objv, "srcPath channelId destPath"); + slaveInterp = GetInterp2(interp, objc, objv); + if (slaveInterp == NULL) { + if (objc > 3) { return TCL_ERROR; } - masterInterp = GetInterp(interp, objv[2]); - if (masterInterp == NULL) { - return TCL_ERROR; + Tcl_ResetResult(interp); + exists = 0; + } + Tcl_SetObjResult(interp, Tcl_NewBooleanObj(exists)); + return TCL_OK; + } + case OPT_EXPOSE: + if ((objc < 4) || (objc > 5)) { + Tcl_WrongNumArgs(interp, 2, objv, "path hiddenCmdName ?cmdName?"); + return TCL_ERROR; + } + slaveInterp = GetInterp(interp, objv[2]); + if (slaveInterp == NULL) { + return TCL_ERROR; + } + return SlaveExpose(interp, slaveInterp, objc - 3, objv + 3); + case OPT_HIDE: + if ((objc < 4) || (objc > 5)) { + Tcl_WrongNumArgs(interp, 2, objv, "path cmdName ?hiddenCmdName?"); + return TCL_ERROR; + } + slaveInterp = GetInterp(interp, objv[2]); + if (slaveInterp == NULL) { + return TCL_ERROR; + } + return SlaveHide(interp, slaveInterp, objc - 3, objv + 3); + case OPT_HIDDEN: + slaveInterp = GetInterp2(interp, objc, objv); + if (slaveInterp == NULL) { + return TCL_ERROR; + } + return SlaveHidden(interp, slaveInterp); + case OPT_ISSAFE: + slaveInterp = GetInterp2(interp, objc, objv); + if (slaveInterp == NULL) { + return TCL_ERROR; + } + Tcl_SetObjResult(interp, Tcl_NewBooleanObj(Tcl_IsSafe(slaveInterp))); + return TCL_OK; + case OPT_INVOKEHID: { + int i; + const char *namespaceName; + static const char *const hiddenOptions[] = { + "-global", "-namespace", "--", NULL + }; + enum hiddenOption { + OPT_GLOBAL, OPT_NAMESPACE, OPT_LAST + }; + + namespaceName = NULL; + for (i = 3; i < objc; i++) { + if (TclGetString(objv[i])[0] != '-') { + break; } - chan = Tcl_GetChannel(masterInterp, Tcl_GetString(objv[3]), - NULL); - if (chan == NULL) { - TclTransferResult(masterInterp, TCL_OK, interp); + if (Tcl_GetIndexFromObj(interp, objv[i], hiddenOptions, "option", + 0, &index) != TCL_OK) { return TCL_ERROR; } - slaveInterp = GetInterp(interp, objv[4]); - if (slaveInterp == NULL) { - return TCL_ERROR; + if (index == OPT_GLOBAL) { + namespaceName = "::"; + } else if (index == OPT_NAMESPACE) { + if (++i == objc) { /* There must be more arguments. */ + break; + } else { + namespaceName = TclGetString(objv[i]); + } + } else { + i++; + break; } - Tcl_RegisterChannel(slaveInterp, chan); - return TCL_OK; } - case OPT_TARGET: { - Tcl_Interp *slaveInterp; - InterpInfo *iiPtr; - Tcl_HashEntry *hPtr; - Alias *aliasPtr; - char *aliasName; + if (objc - i < 1) { + Tcl_WrongNumArgs(interp, 2, objv, + "path ?-namespace ns? ?-global? ?--? cmd ?arg ..?"); + return TCL_ERROR; + } + slaveInterp = GetInterp(interp, objv[2]); + if (slaveInterp == NULL) { + return TCL_ERROR; + } + return SlaveInvokeHidden(interp, slaveInterp, namespaceName, objc - i, + objv + i); + } + case OPT_LIMIT: { + static const char *const limitTypes[] = { + "commands", "time", NULL + }; + enum LimitTypes { + LIMIT_TYPE_COMMANDS, LIMIT_TYPE_TIME + }; + int limitType; + + if (objc < 4) { + Tcl_WrongNumArgs(interp, 2, objv, + "path limitType ?-option value ...?"); + return TCL_ERROR; + } + slaveInterp = GetInterp(interp, objv[2]); + if (slaveInterp == NULL) { + return TCL_ERROR; + } + if (Tcl_GetIndexFromObj(interp, objv[3], limitTypes, "limit type", 0, + &limitType) != TCL_OK) { + return TCL_ERROR; + } + switch ((enum LimitTypes) limitType) { + case LIMIT_TYPE_COMMANDS: + return SlaveCommandLimitCmd(interp, slaveInterp, 4, objc,objv); + case LIMIT_TYPE_TIME: + return SlaveTimeLimitCmd(interp, slaveInterp, 4, objc, objv); + } + } + case OPT_MARKTRUSTED: + if (objc != 3) { + Tcl_WrongNumArgs(interp, 2, objv, "path"); + return TCL_ERROR; + } + slaveInterp = GetInterp(interp, objv[2]); + if (slaveInterp == NULL) { + return TCL_ERROR; + } + return SlaveMarkTrusted(interp, slaveInterp); + case OPT_RECLIMIT: + if (objc != 3 && objc != 4) { + Tcl_WrongNumArgs(interp, 2, objv, "path ?newlimit?"); + return TCL_ERROR; + } + slaveInterp = GetInterp(interp, objv[2]); + if (slaveInterp == NULL) { + return TCL_ERROR; + } + return SlaveRecursionLimit(interp, slaveInterp, objc - 3, objv + 3); + case OPT_SLAVES: { + InterpInfo *iiPtr; + Tcl_Obj *resultPtr; + Tcl_HashEntry *hPtr; + Tcl_HashSearch hashSearch; + char *string; - if (objc != 4) { - Tcl_WrongNumArgs(interp, 2, objv, "path alias"); - return TCL_ERROR; - } + slaveInterp = GetInterp2(interp, objc, objv); + if (slaveInterp == NULL) { + return TCL_ERROR; + } + iiPtr = (InterpInfo *) ((Interp *) slaveInterp)->interpInfo; + resultPtr = Tcl_NewObj(); + hPtr = Tcl_FirstHashEntry(&iiPtr->master.slaveTable, &hashSearch); + for ( ; hPtr != NULL; hPtr = Tcl_NextHashEntry(&hashSearch)) { + string = Tcl_GetHashKey(&iiPtr->master.slaveTable, hPtr); + Tcl_ListObjAppendElement(NULL, resultPtr, + Tcl_NewStringObj(string, -1)); + } + Tcl_SetObjResult(interp, resultPtr); + return TCL_OK; + } + case OPT_TRANSFER: + case OPT_SHARE: { + Tcl_Interp *masterInterp; /* The master of the slave. */ + Tcl_Channel chan; - slaveInterp = GetInterp(interp, objv[2]); - if (slaveInterp == NULL) { + if (objc != 5) { + Tcl_WrongNumArgs(interp, 2, objv, "srcPath channelId destPath"); + return TCL_ERROR; + } + masterInterp = GetInterp(interp, objv[2]); + if (masterInterp == NULL) { + return TCL_ERROR; + } + chan = Tcl_GetChannel(masterInterp, TclGetString(objv[3]), NULL); + if (chan == NULL) { + Tcl_TransferResult(masterInterp, TCL_OK, interp); + return TCL_ERROR; + } + slaveInterp = GetInterp(interp, objv[4]); + if (slaveInterp == NULL) { + return TCL_ERROR; + } + Tcl_RegisterChannel(slaveInterp, chan); + if (index == OPT_TRANSFER) { + /* + * When transferring, as opposed to sharing, we must unhitch the + * channel from the interpreter where it started. + */ + + if (Tcl_UnregisterChannel(masterInterp, chan) != TCL_OK) { + Tcl_TransferResult(masterInterp, TCL_OK, interp); return TCL_ERROR; } + } + return TCL_OK; + } + case OPT_TARGET: { + InterpInfo *iiPtr; + Tcl_HashEntry *hPtr; + Alias *aliasPtr; + const char *aliasName; + + if (objc != 4) { + Tcl_WrongNumArgs(interp, 2, objv, "path alias"); + return TCL_ERROR; + } - aliasName = Tcl_GetString(objv[3]); + slaveInterp = GetInterp(interp, objv[2]); + if (slaveInterp == NULL) { + return TCL_ERROR; + } - iiPtr = (InterpInfo *) ((Interp *) slaveInterp)->interpInfo; - hPtr = Tcl_FindHashEntry(&iiPtr->slave.aliasTable, aliasName); - if (hPtr == NULL) { - Tcl_AppendStringsToObj(Tcl_GetObjResult(interp), - "alias \"", aliasName, "\" in path \"", - Tcl_GetString(objv[2]), "\" not found", - (char *) NULL); - return TCL_ERROR; - } - aliasPtr = (Alias *) Tcl_GetHashValue(hPtr); - if (Tcl_GetInterpPath(interp, aliasPtr->targetInterp) != TCL_OK) { - Tcl_ResetResult(interp); - Tcl_AppendStringsToObj(Tcl_GetObjResult(interp), - "target interpreter for alias \"", aliasName, - "\" in path \"", Tcl_GetString(objv[2]), - "\" is not my descendant", (char *) NULL); - return TCL_ERROR; - } - return TCL_OK; + aliasName = TclGetString(objv[3]); + + iiPtr = (InterpInfo *) ((Interp *) slaveInterp)->interpInfo; + hPtr = Tcl_FindHashEntry(&iiPtr->slave.aliasTable, aliasName); + if (hPtr == NULL) { + Tcl_SetObjResult(interp, Tcl_ObjPrintf( + "alias \"%s\" in path \"%s\" not found", + aliasName, Tcl_GetString(objv[2]))); + Tcl_SetErrorCode(interp, "TCL", "LOOKUP", "ALIAS", aliasName, + NULL); + return TCL_ERROR; } - case OPT_TRANSFER: { - Tcl_Interp *slaveInterp; /* A slave. */ - Tcl_Interp *masterInterp; /* Its master. */ - Tcl_Channel chan; - - if (objc != 5) { - Tcl_WrongNumArgs(interp, 2, objv, - "srcPath channelId destPath"); - return TCL_ERROR; - } - masterInterp = GetInterp(interp, objv[2]); - if (masterInterp == NULL) { - return TCL_ERROR; - } - chan = Tcl_GetChannel(masterInterp, Tcl_GetString(objv[3]), NULL); - if (chan == NULL) { - TclTransferResult(masterInterp, TCL_OK, interp); - return TCL_ERROR; - } - slaveInterp = GetInterp(interp, objv[4]); - if (slaveInterp == NULL) { - return TCL_ERROR; - } - Tcl_RegisterChannel(slaveInterp, chan); - if (Tcl_UnregisterChannel(masterInterp, chan) != TCL_OK) { - TclTransferResult(masterInterp, TCL_OK, interp); - return TCL_ERROR; - } - return TCL_OK; + aliasPtr = Tcl_GetHashValue(hPtr); + if (Tcl_GetInterpPath(interp, aliasPtr->targetInterp) != TCL_OK) { + Tcl_SetObjResult(interp, Tcl_ObjPrintf( + "target interpreter for alias \"%s\" in path \"%s\" is " + "not my descendant", aliasName, Tcl_GetString(objv[2]))); + Tcl_SetErrorCode(interp, "TCL", "OPERATION", "INTERP", + "TARGETSHROUDED", NULL); + return TCL_ERROR; } + return TCL_OK; + } } return TCL_OK; } @@ -785,24 +1122,24 @@ Tcl_InterpObjCmd(clientData, interp, objc, objv) * potentially specified on the command line to an Tcl_Interp. * * Results: - * The return value is the interp specified on the command line, - * or the interp argument itself if no interp was specified on the - * command line. If the interp could not be found or the wrong - * number of arguments was specified on the command line, the return - * value is NULL and an error message is left in the interp's result. + * The return value is the interp specified on the command line, or the + * interp argument itself if no interp was specified on the command line. + * If the interp could not be found or the wrong number of arguments was + * specified on the command line, the return value is NULL and an error + * message is left in the interp's result. * * Side effects: * None. * *--------------------------------------------------------------------------- */ - + static Tcl_Interp * -GetInterp2(interp, objc, objv) - Tcl_Interp *interp; /* Default interp if no interp was specified +GetInterp2( + Tcl_Interp *interp, /* Default interp if no interp was specified * on the command line. */ - int objc; /* Number of arguments. */ - Tcl_Obj *CONST objv[]; /* Argument objects. */ + int objc, /* Number of arguments. */ + Tcl_Obj *const objv[]) /* Argument objects. */ { if (objc == 2) { return interp; @@ -831,25 +1168,25 @@ GetInterp2(interp, objc, objv) */ int -Tcl_CreateAlias(slaveInterp, slaveCmd, targetInterp, targetCmd, argc, argv) - Tcl_Interp *slaveInterp; /* Interpreter for source command. */ - CONST char *slaveCmd; /* Command to install in slave. */ - Tcl_Interp *targetInterp; /* Interpreter for target command. */ - CONST char *targetCmd; /* Name of target command. */ - int argc; /* How many additional arguments? */ - CONST char * CONST *argv; /* These are the additional args. */ +Tcl_CreateAlias( + Tcl_Interp *slaveInterp, /* Interpreter for source command. */ + const char *slaveCmd, /* Command to install in slave. */ + Tcl_Interp *targetInterp, /* Interpreter for target command. */ + const char *targetCmd, /* Name of target command. */ + int argc, /* How many additional arguments? */ + const char *const *argv) /* These are the additional args. */ { Tcl_Obj *slaveObjPtr, *targetObjPtr; Tcl_Obj **objv; int i; int result; - - objv = (Tcl_Obj **) ckalloc((unsigned) sizeof(Tcl_Obj *) * argc); + + objv = TclStackAlloc(slaveInterp, (unsigned) sizeof(Tcl_Obj *) * argc); for (i = 0; i < argc; i++) { - objv[i] = Tcl_NewStringObj(argv[i], -1); - Tcl_IncrRefCount(objv[i]); + objv[i] = Tcl_NewStringObj(argv[i], -1); + Tcl_IncrRefCount(objv[i]); } - + slaveObjPtr = Tcl_NewStringObj(slaveCmd, -1); Tcl_IncrRefCount(slaveObjPtr); @@ -862,7 +1199,7 @@ Tcl_CreateAlias(slaveInterp, slaveCmd, targetInterp, targetCmd, argc, argv) for (i = 0; i < argc; i++) { Tcl_DecrRefCount(objv[i]); } - ckfree((char *) objv); + TclStackFree(slaveInterp, objv); Tcl_DecrRefCount(targetObjPtr); Tcl_DecrRefCount(slaveObjPtr); @@ -886,13 +1223,13 @@ Tcl_CreateAlias(slaveInterp, slaveCmd, targetInterp, targetCmd, argc, argv) */ int -Tcl_CreateAliasObj(slaveInterp, slaveCmd, targetInterp, targetCmd, objc, objv) - Tcl_Interp *slaveInterp; /* Interpreter for source command. */ - CONST char *slaveCmd; /* Command to install in slave. */ - Tcl_Interp *targetInterp; /* Interpreter for target command. */ - CONST char *targetCmd; /* Name of target command. */ - int objc; /* How many additional arguments? */ - Tcl_Obj *CONST objv[]; /* Argument vector. */ +Tcl_CreateAliasObj( + Tcl_Interp *slaveInterp, /* Interpreter for source command. */ + const char *slaveCmd, /* Command to install in slave. */ + Tcl_Interp *targetInterp, /* Interpreter for target command. */ + const char *targetCmd, /* Name of target command. */ + int objc, /* How many additional arguments? */ + Tcl_Obj *const objv[]) /* Argument vector. */ { Tcl_Obj *slaveObjPtr, *targetObjPtr; int result; @@ -919,7 +1256,7 @@ Tcl_CreateAliasObj(slaveInterp, slaveCmd, targetInterp, targetCmd, objc, objv) * Gets information about an alias. * * Results: - * A standard Tcl result. + * A standard Tcl result. * * Side effects: * None. @@ -928,29 +1265,29 @@ Tcl_CreateAliasObj(slaveInterp, slaveCmd, targetInterp, targetCmd, objc, objv) */ int -Tcl_GetAlias(interp, aliasName, targetInterpPtr, targetNamePtr, argcPtr, - argvPtr) - Tcl_Interp *interp; /* Interp to start search from. */ - CONST char *aliasName; /* Name of alias to find. */ - Tcl_Interp **targetInterpPtr; /* (Return) target interpreter. */ - CONST char **targetNamePtr; /* (Return) name of target command. */ - int *argcPtr; /* (Return) count of addnl args. */ - CONST char ***argvPtr; /* (Return) additional arguments. */ +Tcl_GetAlias( + Tcl_Interp *interp, /* Interp to start search from. */ + const char *aliasName, /* Name of alias to find. */ + Tcl_Interp **targetInterpPtr, + /* (Return) target interpreter. */ + const char **targetNamePtr, /* (Return) name of target command. */ + int *argcPtr, /* (Return) count of addnl args. */ + const char ***argvPtr) /* (Return) additional arguments. */ { - InterpInfo *iiPtr; + InterpInfo *iiPtr = (InterpInfo *) ((Interp *) interp)->interpInfo; Tcl_HashEntry *hPtr; Alias *aliasPtr; int i, objc; Tcl_Obj **objv; - - iiPtr = (InterpInfo *) ((Interp *) interp)->interpInfo; + hPtr = Tcl_FindHashEntry(&iiPtr->slave.aliasTable, aliasName); if (hPtr == NULL) { - Tcl_AppendStringsToObj(Tcl_GetObjResult(interp), - "alias \"", aliasName, "\" not found", (char *) NULL); + Tcl_SetObjResult(interp, Tcl_ObjPrintf( + "alias \"%s\" not found", aliasName)); + Tcl_SetErrorCode(interp, "TCL", "LOOKUP", "ALIAS", aliasName, NULL); return TCL_ERROR; } - aliasPtr = (Alias *) Tcl_GetHashValue(hPtr); + aliasPtr = Tcl_GetHashValue(hPtr); objc = aliasPtr->objc; objv = &aliasPtr->objPtr; @@ -958,17 +1295,17 @@ Tcl_GetAlias(interp, aliasName, targetInterpPtr, targetNamePtr, argcPtr, *targetInterpPtr = aliasPtr->targetInterp; } if (targetNamePtr != NULL) { - *targetNamePtr = Tcl_GetString(objv[0]); + *targetNamePtr = TclGetString(objv[0]); } if (argcPtr != NULL) { *argcPtr = objc - 1; } if (argvPtr != NULL) { - *argvPtr = (CONST char **) - ckalloc((unsigned) sizeof(CONST char *) * (objc - 1)); - for (i = 1; i < objc; i++) { - *argvPtr[i - 1] = Tcl_GetString(objv[i]); - } + *argvPtr = (const char **) + ckalloc(sizeof(const char *) * (objc - 1)); + for (i = 1; i < objc; i++) { + (*argvPtr)[i - 1] = TclGetString(objv[i]); + } } return TCL_OK; } @@ -990,43 +1327,43 @@ Tcl_GetAlias(interp, aliasName, targetInterpPtr, targetNamePtr, argcPtr, */ int -Tcl_GetAliasObj(interp, aliasName, targetInterpPtr, targetNamePtr, objcPtr, - objvPtr) - Tcl_Interp *interp; /* Interp to start search from. */ - CONST char *aliasName; /* Name of alias to find. */ - Tcl_Interp **targetInterpPtr; /* (Return) target interpreter. */ - CONST char **targetNamePtr; /* (Return) name of target command. */ - int *objcPtr; /* (Return) count of addnl args. */ - Tcl_Obj ***objvPtr; /* (Return) additional args. */ +Tcl_GetAliasObj( + Tcl_Interp *interp, /* Interp to start search from. */ + const char *aliasName, /* Name of alias to find. */ + Tcl_Interp **targetInterpPtr, + /* (Return) target interpreter. */ + const char **targetNamePtr, /* (Return) name of target command. */ + int *objcPtr, /* (Return) count of addnl args. */ + Tcl_Obj ***objvPtr) /* (Return) additional args. */ { - InterpInfo *iiPtr; + InterpInfo *iiPtr = (InterpInfo *) ((Interp *) interp)->interpInfo; Tcl_HashEntry *hPtr; - Alias *aliasPtr; + Alias *aliasPtr; int objc; Tcl_Obj **objv; - iiPtr = (InterpInfo *) ((Interp *) interp)->interpInfo; hPtr = Tcl_FindHashEntry(&iiPtr->slave.aliasTable, aliasName); - if (hPtr == (Tcl_HashEntry *) NULL) { - Tcl_AppendStringsToObj(Tcl_GetObjResult(interp), - "alias \"", aliasName, "\" not found", (char *) NULL); - return TCL_ERROR; + if (hPtr == NULL) { + Tcl_SetObjResult(interp, Tcl_ObjPrintf( + "alias \"%s\" not found", aliasName)); + Tcl_SetErrorCode(interp, "TCL", "LOOKUP", "ALIAS", aliasName, NULL); + return TCL_ERROR; } - aliasPtr = (Alias *) Tcl_GetHashValue(hPtr); + aliasPtr = Tcl_GetHashValue(hPtr); objc = aliasPtr->objc; objv = &aliasPtr->objPtr; - if (targetInterpPtr != (Tcl_Interp **) NULL) { - *targetInterpPtr = aliasPtr->targetInterp; + if (targetInterpPtr != NULL) { + *targetInterpPtr = aliasPtr->targetInterp; } - if (targetNamePtr != (CONST char **) NULL) { - *targetNamePtr = Tcl_GetString(objv[0]); + if (targetNamePtr != NULL) { + *targetNamePtr = TclGetString(objv[0]); } - if (objcPtr != (int *) NULL) { - *objcPtr = objc - 1; + if (objcPtr != NULL) { + *objcPtr = objc - 1; } - if (objvPtr != (Tcl_Obj ***) NULL) { - *objvPtr = objv + 1; + if (objvPtr != NULL) { + *objvPtr = objv + 1; } return TCL_OK; } @@ -1036,30 +1373,29 @@ Tcl_GetAliasObj(interp, aliasName, targetInterpPtr, targetNamePtr, objcPtr, * * TclPreventAliasLoop -- * - * When defining an alias or renaming a command, prevent an alias - * loop from being formed. + * When defining an alias or renaming a command, prevent an alias loop + * from being formed. * * Results: * A standard Tcl object result. * * Side effects: - * If TCL_ERROR is returned, the function also stores an error message - * in the interpreter's result object. + * If TCL_ERROR is returned, the function also stores an error message in + * the interpreter's result object. * * NOTE: - * This function is public internal (instead of being static to - * this file) because it is also used from TclRenameCommand. + * This function is public internal (instead of being static to this + * file) because it is also used from TclRenameCommand. * *---------------------------------------------------------------------- */ int -TclPreventAliasLoop(interp, cmdInterp, cmd) - Tcl_Interp *interp; /* Interp in which to report errors. */ - Tcl_Interp *cmdInterp; /* Interp in which the command is - * being defined. */ - Tcl_Command cmd; /* Tcl command we are attempting - * to define. */ +TclPreventAliasLoop( + Tcl_Interp *interp, /* Interp in which to report errors. */ + Tcl_Interp *cmdInterp, /* Interp in which the command is being + * defined. */ + Tcl_Command cmd) /* Tcl command we are attempting to define. */ { Command *cmdPtr = (Command *) cmd; Alias *aliasPtr, *nextAliasPtr; @@ -1067,28 +1403,28 @@ TclPreventAliasLoop(interp, cmdInterp, cmd) Command *aliasCmdPtr; /* - * If we are not creating or renaming an alias, then it is - * always OK to create or rename the command. + * If we are not creating or renaming an alias, then it is always OK to + * create or rename the command. */ - + if (cmdPtr->objProc != AliasObjCmd) { - return TCL_OK; + return TCL_OK; } /* - * OK, we are dealing with an alias, so traverse the chain of aliases. - * If we encounter the alias we are defining (or renaming to) any in - * the chain then we have a loop. + * OK, we are dealing with an alias, so traverse the chain of aliases. If + * we encounter the alias we are defining (or renaming to) any in the + * chain then we have a loop. */ - aliasPtr = (Alias *) cmdPtr->objClientData; + aliasPtr = cmdPtr->objClientData; nextAliasPtr = aliasPtr; while (1) { Tcl_Obj *cmdNamePtr; - /* - * If the target of the next alias in the chain is the same as - * the source alias, we have a loop. + /* + * If the target of the next alias in the chain is the same as the + * source alias, we have a loop. */ if (Tcl_InterpDeleted(nextAliasPtr->targetInterp)) { @@ -1097,39 +1433,39 @@ TclPreventAliasLoop(interp, cmdInterp, cmd) * [Bug #641195] */ - Tcl_AppendStringsToObj(Tcl_GetObjResult(interp), - "cannot define or rename alias \"", - Tcl_GetString(aliasPtr->namePtr), - "\": interpreter deleted", (char *) NULL); + Tcl_SetObjResult(interp, Tcl_ObjPrintf( + "cannot define or rename alias \"%s\": interpreter deleted", + Tcl_GetCommandName(cmdInterp, cmd))); return TCL_ERROR; } cmdNamePtr = nextAliasPtr->objPtr; aliasCmd = Tcl_FindCommand(nextAliasPtr->targetInterp, - Tcl_GetString(cmdNamePtr), + TclGetString(cmdNamePtr), Tcl_GetGlobalNamespace(nextAliasPtr->targetInterp), /*flags*/ 0); - if (aliasCmd == (Tcl_Command) NULL) { - return TCL_OK; - } + if (aliasCmd == NULL) { + return TCL_OK; + } aliasCmdPtr = (Command *) aliasCmd; - if (aliasCmdPtr == cmdPtr) { - Tcl_AppendStringsToObj(Tcl_GetObjResult(interp), - "cannot define or rename alias \"", - Tcl_GetString(aliasPtr->namePtr), - "\": would create a loop", (char *) NULL); - return TCL_ERROR; - } - - /* + if (aliasCmdPtr == cmdPtr) { + Tcl_SetObjResult(interp, Tcl_ObjPrintf( + "cannot define or rename alias \"%s\": would create a loop", + Tcl_GetCommandName(cmdInterp, cmd))); + Tcl_SetErrorCode(interp, "TCL", "OPERATION", "INTERP", + "ALIASLOOP", NULL); + return TCL_ERROR; + } + + /* * Otherwise, follow the chain one step further. See if the target - * command is an alias - if so, follow the loop to its target - * command. Otherwise we do not have a loop. + * command is an alias - if so, follow the loop to its target command. + * Otherwise we do not have a loop. */ - if (aliasCmdPtr->objProc != AliasObjCmd) { - return TCL_OK; - } - nextAliasPtr = (Alias *) aliasCmdPtr->objClientData; + if (aliasCmdPtr->objProc != AliasObjCmd) { + return TCL_OK; + } + nextAliasPtr = aliasCmdPtr->objClientData; } /* NOTREACHED */ @@ -1146,24 +1482,23 @@ TclPreventAliasLoop(interp, cmdInterp, cmd) * A standard Tcl result. * * Side effects: - * An alias command is created and entered into the alias table - * for the slave interpreter. + * An alias command is created and entered into the alias table for the + * slave interpreter. * *---------------------------------------------------------------------- */ static int -AliasCreate(interp, slaveInterp, masterInterp, namePtr, targetNamePtr, - objc, objv) - Tcl_Interp *interp; /* Interp for error reporting. */ - Tcl_Interp *slaveInterp; /* Interp where alias cmd will live or from +AliasCreate( + Tcl_Interp *interp, /* Interp for error reporting. */ + Tcl_Interp *slaveInterp, /* Interp where alias cmd will live or from * which alias will be deleted. */ - Tcl_Interp *masterInterp; /* Interp in which target command will be + Tcl_Interp *masterInterp, /* Interp in which target command will be * invoked. */ - Tcl_Obj *namePtr; /* Name of alias cmd. */ - Tcl_Obj *targetNamePtr; /* Name of target cmd. */ - int objc; /* Additional arguments to store */ - Tcl_Obj *CONST objv[]; /* with alias. */ + Tcl_Obj *namePtr, /* Name of alias cmd. */ + Tcl_Obj *targetNamePtr, /* Name of target cmd. */ + int objc, /* Additional arguments to store */ + Tcl_Obj *const objv[]) /* with alias. */ { Alias *aliasPtr; Tcl_HashEntry *hPtr; @@ -1171,13 +1506,12 @@ AliasCreate(interp, slaveInterp, masterInterp, namePtr, targetNamePtr, Slave *slavePtr; Master *masterPtr; Tcl_Obj **prefv; - int new, i; + int isNew, i; - aliasPtr = (Alias *) ckalloc((unsigned) (sizeof(Alias) - + objc * sizeof(Tcl_Obj *))); - aliasPtr->namePtr = namePtr; - Tcl_IncrRefCount(aliasPtr->namePtr); - aliasPtr->targetInterp = masterInterp; + aliasPtr = ckalloc(sizeof(Alias) + objc * sizeof(Tcl_Obj *)); + aliasPtr->token = namePtr; + Tcl_IncrRefCount(aliasPtr->token); + aliasPtr->targetInterp = masterInterp; aliasPtr->objc = objc + 1; prefv = &aliasPtr->objPtr; @@ -1192,34 +1526,40 @@ AliasCreate(interp, slaveInterp, masterInterp, namePtr, targetNamePtr, Tcl_Preserve(slaveInterp); Tcl_Preserve(masterInterp); + if (slaveInterp == masterInterp) { + aliasPtr->slaveCmd = Tcl_NRCreateCommand(slaveInterp, + TclGetString(namePtr), AliasObjCmd, AliasNRCmd, aliasPtr, + AliasObjCmdDeleteProc); + } else { aliasPtr->slaveCmd = Tcl_CreateObjCommand(slaveInterp, - Tcl_GetString(namePtr), AliasObjCmd, (ClientData) aliasPtr, + TclGetString(namePtr), AliasObjCmd, aliasPtr, AliasObjCmdDeleteProc); + } if (TclPreventAliasLoop(interp, slaveInterp, aliasPtr->slaveCmd) != TCL_OK) { /* - * Found an alias loop! The last call to Tcl_CreateObjCommand made - * the alias point to itself. Delete the command and its alias - * record. Be careful to wipe out its client data first, so the - * command doesn't try to delete itself. + * Found an alias loop! The last call to Tcl_CreateObjCommand made the + * alias point to itself. Delete the command and its alias record. Be + * careful to wipe out its client data first, so the command doesn't + * try to delete itself. */ Command *cmdPtr; - - Tcl_DecrRefCount(aliasPtr->namePtr); + + Tcl_DecrRefCount(aliasPtr->token); Tcl_DecrRefCount(targetNamePtr); for (i = 0; i < objc; i++) { Tcl_DecrRefCount(objv[i]); } - + cmdPtr = (Command *) aliasPtr->slaveCmd; cmdPtr->clientData = NULL; cmdPtr->deleteProc = NULL; cmdPtr->deleteData = NULL; Tcl_DeleteCommandFromToken(slaveInterp, aliasPtr->slaveCmd); - ckfree((char *) aliasPtr); + ckfree(aliasPtr); /* * The result was already set by TclPreventAliasLoop. @@ -1231,28 +1571,42 @@ AliasCreate(interp, slaveInterp, masterInterp, namePtr, targetNamePtr, } /* - * Make an entry in the alias table. If it already exists delete - * the alias command. Then retry. + * Make an entry in the alias table. If it already exists, retry. */ slavePtr = &((InterpInfo *) ((Interp *) slaveInterp)->interpInfo)->slave; while (1) { - Alias *oldAliasPtr; - char *string; - - string = Tcl_GetString(namePtr); - hPtr = Tcl_CreateHashEntry(&slavePtr->aliasTable, string, &new); - if (new != 0) { + Tcl_Obj *newToken; + const char *string; + + string = TclGetString(aliasPtr->token); + hPtr = Tcl_CreateHashEntry(&slavePtr->aliasTable, string, &isNew); + if (isNew != 0) { break; } - oldAliasPtr = (Alias *) Tcl_GetHashValue(hPtr); - Tcl_DeleteCommandFromToken(slaveInterp, oldAliasPtr->slaveCmd); + /* + * The alias name cannot be used as unique token, it is already taken. + * We can produce a unique token by prepending "::" repeatedly. This + * algorithm is a stop-gap to try to maintain the command name as + * token for most use cases, fearful of possible backwards compat + * problems. A better algorithm would produce unique tokens that need + * not be related to the command name. + * + * ATTENTION: the tests in interp.test and possibly safe.test depend + * on the precise definition of these tokens. + */ + + TclNewLiteralStringObj(newToken, "::"); + Tcl_AppendObjToObj(newToken, aliasPtr->token); + Tcl_DecrRefCount(aliasPtr->token); + aliasPtr->token = newToken; + Tcl_IncrRefCount(aliasPtr->token); } aliasPtr->aliasEntryPtr = hPtr; - Tcl_SetHashValue(hPtr, (ClientData) aliasPtr); - + Tcl_SetHashValue(hPtr, aliasPtr); + /* * Create the new command. We must do it after deleting any old command, * because the alias may be pointing at a renamed alias, as in: @@ -1262,23 +1616,20 @@ AliasCreate(interp, slaveInterp, masterInterp, namePtr, targetNamePtr, * interp alias {} foo {} zop # Now recreate "foo"... */ - targetPtr = (Target *) ckalloc((unsigned) sizeof(Target)); + targetPtr = ckalloc(sizeof(Target)); targetPtr->slaveCmd = aliasPtr->slaveCmd; targetPtr->slaveInterp = slaveInterp; - Tcl_MutexLock(&cntMutex); - masterPtr = &((InterpInfo *) ((Interp *) masterInterp)->interpInfo)->master; - do { - hPtr = Tcl_CreateHashEntry(&masterPtr->targetTable, - (char *) aliasCounter, &new); - aliasCounter++; - } while (new == 0); - Tcl_MutexUnlock(&cntMutex); - - Tcl_SetHashValue(hPtr, (ClientData) targetPtr); - aliasPtr->targetEntryPtr = hPtr; + masterPtr = &((InterpInfo*) ((Interp*) masterInterp)->interpInfo)->master; + targetPtr->nextPtr = masterPtr->targetsPtr; + targetPtr->prevPtr = NULL; + if (masterPtr->targetsPtr != NULL) { + masterPtr->targetsPtr->prevPtr = targetPtr; + } + masterPtr->targetsPtr = targetPtr; + aliasPtr->targetPtr = targetPtr; - Tcl_SetObjResult(interp, namePtr); + Tcl_SetObjResult(interp, aliasPtr->token); Tcl_Release(slaveInterp); Tcl_Release(masterInterp); @@ -1302,10 +1653,10 @@ AliasCreate(interp, slaveInterp, masterInterp, namePtr, targetNamePtr, */ static int -AliasDelete(interp, slaveInterp, namePtr) - Tcl_Interp *interp; /* Interpreter for result & errors. */ - Tcl_Interp *slaveInterp; /* Interpreter containing alias. */ - Tcl_Obj *namePtr; /* Name of alias to delete. */ +AliasDelete( + Tcl_Interp *interp, /* Interpreter for result & errors. */ + Tcl_Interp *slaveInterp, /* Interpreter containing alias. */ + Tcl_Obj *namePtr) /* Name of alias to delete. */ { Slave *slavePtr; Alias *aliasPtr; @@ -1318,13 +1669,15 @@ AliasDelete(interp, slaveInterp, namePtr) */ slavePtr = &((InterpInfo *) ((Interp *) slaveInterp)->interpInfo)->slave; - hPtr = Tcl_FindHashEntry(&slavePtr->aliasTable, Tcl_GetString(namePtr)); + hPtr = Tcl_FindHashEntry(&slavePtr->aliasTable, TclGetString(namePtr)); if (hPtr == NULL) { - Tcl_AppendStringsToObj(Tcl_GetObjResult(interp), "alias \"", - Tcl_GetString(namePtr), "\" not found", NULL); - return TCL_ERROR; + Tcl_SetObjResult(interp, Tcl_ObjPrintf( + "alias \"%s\" not found", TclGetString(namePtr))); + Tcl_SetErrorCode(interp, "TCL", "LOOKUP", "ALIAS", + TclGetString(namePtr), NULL); + return TCL_ERROR; } - aliasPtr = (Alias *) Tcl_GetHashValue(hPtr); + aliasPtr = Tcl_GetHashValue(hPtr); Tcl_DeleteCommandFromToken(slaveInterp, aliasPtr->slaveCmd); return TCL_OK; } @@ -1334,10 +1687,9 @@ AliasDelete(interp, slaveInterp, namePtr) * * AliasDescribe -- * - * Sets the interpreter's result object to a Tcl list describing - * the given alias in the given interpreter: its target command - * and the additional arguments to prepend to any invocation - * of the alias. + * Sets the interpreter's result object to a Tcl list describing the + * given alias in the given interpreter: its target command and the + * additional arguments to prepend to any invocation of the alias. * * Results: * A standard Tcl result. @@ -1349,14 +1701,14 @@ AliasDelete(interp, slaveInterp, namePtr) */ static int -AliasDescribe(interp, slaveInterp, namePtr) - Tcl_Interp *interp; /* Interpreter for result & errors. */ - Tcl_Interp *slaveInterp; /* Interpreter containing alias. */ - Tcl_Obj *namePtr; /* Name of alias to describe. */ +AliasDescribe( + Tcl_Interp *interp, /* Interpreter for result & errors. */ + Tcl_Interp *slaveInterp, /* Interpreter containing alias. */ + Tcl_Obj *namePtr) /* Name of alias to describe. */ { Slave *slavePtr; Tcl_HashEntry *hPtr; - Alias *aliasPtr; + Alias *aliasPtr; Tcl_Obj *prefixPtr; /* @@ -1368,9 +1720,9 @@ AliasDescribe(interp, slaveInterp, namePtr) slavePtr = &((InterpInfo *) ((Interp *) slaveInterp)->interpInfo)->slave; hPtr = Tcl_FindHashEntry(&slavePtr->aliasTable, Tcl_GetString(namePtr)); if (hPtr == NULL) { - return TCL_OK; + return TCL_OK; } - aliasPtr = (Alias *) Tcl_GetHashValue(hPtr); + aliasPtr = Tcl_GetHashValue(hPtr); prefixPtr = Tcl_NewListObj(aliasPtr->objc, &aliasPtr->objPtr); Tcl_SetObjResult(interp, prefixPtr); return TCL_OK; @@ -1393,24 +1745,24 @@ AliasDescribe(interp, slaveInterp, namePtr) */ static int -AliasList(interp, slaveInterp) - Tcl_Interp *interp; /* Interp for data return. */ - Tcl_Interp *slaveInterp; /* Interp whose aliases to compute. */ +AliasList( + Tcl_Interp *interp, /* Interp for data return. */ + Tcl_Interp *slaveInterp) /* Interp whose aliases to compute. */ { Tcl_HashEntry *entryPtr; Tcl_HashSearch hashSearch; - Tcl_Obj *resultPtr; + Tcl_Obj *resultPtr = Tcl_NewObj(); Alias *aliasPtr; Slave *slavePtr; slavePtr = &((InterpInfo *) ((Interp *) slaveInterp)->interpInfo)->slave; - resultPtr = Tcl_GetObjResult(interp); entryPtr = Tcl_FirstHashEntry(&slavePtr->aliasTable, &hashSearch); for ( ; entryPtr != NULL; entryPtr = Tcl_NextHashEntry(&hashSearch)) { - aliasPtr = (Alias *) Tcl_GetHashValue(entryPtr); - Tcl_ListObjAppendElement(NULL, resultPtr, aliasPtr->namePtr); + aliasPtr = Tcl_GetHashValue(entryPtr); + Tcl_ListObjAppendElement(NULL, resultPtr, aliasPtr->token); } + Tcl_SetObjResult(interp, resultPtr); return TCL_OK; } @@ -1419,80 +1771,184 @@ AliasList(interp, slaveInterp) * * AliasObjCmd -- * - * This is the procedure that services invocations of aliases in a - * slave interpreter. One such command exists for each alias. When - * invoked, this procedure redirects the invocation to the target - * command in the master interpreter as designated by the Alias - * record associated with this command. + * This is the function that services invocations of aliases in a slave + * interpreter. One such command exists for each alias. When invoked, + * this function redirects the invocation to the target command in the + * master interpreter as designated by the Alias record associated with + * this command. * * Results: * A standard Tcl result. * * Side effects: - * Causes forwarding of the invocation; all possible side effects - * may occur as a result of invoking the command to which the - * invocation is forwarded. + * Causes forwarding of the invocation; all possible side effects may + * occur as a result of invoking the command to which the invocation is + * forwarded. * *---------------------------------------------------------------------- */ static int -AliasObjCmd(clientData, interp, objc, objv) - ClientData clientData; /* Alias record. */ - Tcl_Interp *interp; /* Current interpreter. */ - int objc; /* Number of arguments. */ - Tcl_Obj *CONST objv[]; /* Argument vector. */ +AliasNRCmd( + ClientData clientData, /* Alias record. */ + Tcl_Interp *interp, /* Current interpreter. */ + int objc, /* Number of arguments. */ + Tcl_Obj *const objv[]) /* Argument vector. */ +{ + Interp *iPtr = (Interp *) interp; + Alias *aliasPtr = clientData; + int prefc, cmdc, i; + Tcl_Obj **prefv, **cmdv; + int isRootEnsemble = (iPtr->ensembleRewrite.sourceObjs == NULL); + Tcl_Obj *listPtr; + List *listRep; + int flags = TCL_EVAL_INVOKE; + + /* + * Append the arguments to the command prefix and invoke the command in + * the target interp's global namespace. + */ + + prefc = aliasPtr->objc; + prefv = &aliasPtr->objPtr; + cmdc = prefc + objc - 1; + + listPtr = Tcl_NewListObj(cmdc, NULL); + listRep = listPtr->internalRep.twoPtrValue.ptr1; + listRep->elemCount = cmdc; + cmdv = &listRep->elements; + + prefv = &aliasPtr->objPtr; + memcpy(cmdv, prefv, (size_t) (prefc * sizeof(Tcl_Obj *))); + memcpy(cmdv+prefc, objv+1, (size_t) ((objc-1) * sizeof(Tcl_Obj *))); + + for (i=0; i<cmdc; i++) { + Tcl_IncrRefCount(cmdv[i]); + } + + /* + * Use the ensemble rewriting machinery to ensure correct error messages: + * only the source command should show, not the full target prefix. + */ + + if (isRootEnsemble) { + iPtr->ensembleRewrite.sourceObjs = objv; + iPtr->ensembleRewrite.numRemovedObjs = 1; + iPtr->ensembleRewrite.numInsertedObjs = prefc; + } else { + iPtr->ensembleRewrite.numInsertedObjs += prefc - 1; + } + + /* + * We are sending a 0-refCount obj, do not need a callback: it will be + * cleaned up automatically. But we may need to clear the rootEnsemble + * stuff ... + */ + + if (isRootEnsemble) { + TclNRAddCallback(interp, TclClearRootEnsemble, NULL, NULL, NULL, NULL); + } + TclSkipTailcall(interp); + return Tcl_NREvalObj(interp, listPtr, flags); +} + +static int +AliasObjCmd( + ClientData clientData, /* Alias record. */ + Tcl_Interp *interp, /* Current interpreter. */ + int objc, /* Number of arguments. */ + Tcl_Obj *const objv[]) /* Argument vector. */ { #define ALIAS_CMDV_PREALLOC 10 - Tcl_Interp *targetInterp; - Alias *aliasPtr; + Alias *aliasPtr = clientData; + Tcl_Interp *targetInterp = aliasPtr->targetInterp; int result, prefc, cmdc, i; Tcl_Obj **prefv, **cmdv; Tcl_Obj *cmdArr[ALIAS_CMDV_PREALLOC]; - aliasPtr = (Alias *) clientData; - targetInterp = aliasPtr->targetInterp; + Interp *tPtr = (Interp *) targetInterp; + int isRootEnsemble = (tPtr->ensembleRewrite.sourceObjs == NULL); /* - * Append the arguments to the command prefix and invoke the command - * in the target interp's global namespace. + * Append the arguments to the command prefix and invoke the command in + * the target interp's global namespace. */ - + prefc = aliasPtr->objc; prefv = &aliasPtr->objPtr; cmdc = prefc + objc - 1; if (cmdc <= ALIAS_CMDV_PREALLOC) { cmdv = cmdArr; } else { - cmdv = (Tcl_Obj **) ckalloc((unsigned) (cmdc * sizeof(Tcl_Obj *))); + cmdv = TclStackAlloc(interp, cmdc * sizeof(Tcl_Obj *)); } prefv = &aliasPtr->objPtr; - memcpy((VOID *) cmdv, (VOID *) prefv, - (size_t) (prefc * sizeof(Tcl_Obj *))); - memcpy((VOID *) (cmdv+prefc), (VOID *) (objv+1), - (size_t) ((objc-1) * sizeof(Tcl_Obj *))); + memcpy(cmdv, prefv, (size_t) (prefc * sizeof(Tcl_Obj *))); + memcpy(cmdv+prefc, objv+1, (size_t) ((objc-1) * sizeof(Tcl_Obj *))); Tcl_ResetResult(targetInterp); for (i=0; i<cmdc; i++) { Tcl_IncrRefCount(cmdv[i]); } - if (targetInterp != interp) { - Tcl_Preserve((ClientData) targetInterp); - result = Tcl_EvalObjv(targetInterp, cmdc, cmdv, TCL_EVAL_INVOKE); - TclTransferResult(targetInterp, result, interp); - Tcl_Release((ClientData) targetInterp); + + /* + * Use the ensemble rewriting machinery to ensure correct error messages: + * only the source command should show, not the full target prefix. + */ + + if (isRootEnsemble) { + tPtr->ensembleRewrite.sourceObjs = objv; + tPtr->ensembleRewrite.numRemovedObjs = 1; + tPtr->ensembleRewrite.numInsertedObjs = prefc; } else { - result = Tcl_EvalObjv(targetInterp, cmdc, cmdv, TCL_EVAL_INVOKE); + tPtr->ensembleRewrite.numInsertedObjs += prefc - 1; } + + /* + * Protect the target interpreter if it isn't the same as the source + * interpreter so that we can continue to work with it after the target + * command completes. + */ + + if (targetInterp != interp) { + Tcl_Preserve(targetInterp); + } + + /* + * Execute the target command in the target interpreter. + */ + + result = Tcl_EvalObjv(targetInterp, cmdc, cmdv, TCL_EVAL_INVOKE); + + /* + * Clean up the ensemble rewrite info if we set it in the first place. + */ + + if (isRootEnsemble) { + tPtr->ensembleRewrite.sourceObjs = NULL; + tPtr->ensembleRewrite.numRemovedObjs = 0; + tPtr->ensembleRewrite.numInsertedObjs = 0; + } + + /* + * If it was a cross-interpreter alias, we need to transfer the result + * back to the source interpreter and release the lock we previously set + * on the target interpreter. + */ + + if (targetInterp != interp) { + Tcl_TransferResult(targetInterp, result, interp); + Tcl_Release(targetInterp); + } + for (i=0; i<cmdc; i++) { Tcl_DecrRefCount(cmdv[i]); } - if (cmdv != cmdArr) { - ckfree((char *) cmdv); + TclStackFree(interp, cmdv); } - return result; + return result; #undef ALIAS_CMDV_PREALLOC } @@ -1501,42 +1957,54 @@ AliasObjCmd(clientData, interp, objc, objv) * * AliasObjCmdDeleteProc -- * - * Is invoked when an alias command is deleted in a slave. Cleans up - * all storage associated with this alias. + * Is invoked when an alias command is deleted in a slave. Cleans up all + * storage associated with this alias. * * Results: * None. * * Side effects: - * Deletes the alias record and its entry in the alias table for - * the interpreter. + * Deletes the alias record and its entry in the alias table for the + * interpreter. * *---------------------------------------------------------------------- */ static void -AliasObjCmdDeleteProc(clientData) - ClientData clientData; /* The alias record for this alias. */ +AliasObjCmdDeleteProc( + ClientData clientData) /* The alias record for this alias. */ { - Alias *aliasPtr; - Target *targetPtr; + Alias *aliasPtr = clientData; + Target *targetPtr; int i; Tcl_Obj **objv; - aliasPtr = (Alias *) clientData; - - Tcl_DecrRefCount(aliasPtr->namePtr); + Tcl_DecrRefCount(aliasPtr->token); objv = &aliasPtr->objPtr; for (i = 0; i < aliasPtr->objc; i++) { Tcl_DecrRefCount(objv[i]); } Tcl_DeleteHashEntry(aliasPtr->aliasEntryPtr); - targetPtr = (Target *) Tcl_GetHashValue(aliasPtr->targetEntryPtr); - ckfree((char *) targetPtr); - Tcl_DeleteHashEntry(aliasPtr->targetEntryPtr); + /* + * Splice the target record out of the target interpreter's master list. + */ + + targetPtr = aliasPtr->targetPtr; + if (targetPtr->prevPtr != NULL) { + targetPtr->prevPtr->nextPtr = targetPtr->nextPtr; + } else { + Master *masterPtr = &((InterpInfo *) ((Interp *) + aliasPtr->targetInterp)->interpInfo)->master; + + masterPtr->targetsPtr = targetPtr->nextPtr; + } + if (targetPtr->nextPtr != NULL) { + targetPtr->nextPtr->prevPtr = targetPtr->prevPtr; + } - ckfree((char *) aliasPtr); + ckfree(targetPtr); + ckfree(aliasPtr); } /* @@ -1544,29 +2012,29 @@ AliasObjCmdDeleteProc(clientData) * * Tcl_CreateSlave -- * - * Creates a slave interpreter. The slavePath argument denotes the - * name of the new slave relative to the current interpreter; the - * slave is a direct descendant of the one-before-last component of - * the path, e.g. it is a descendant of the current interpreter if - * the slavePath argument contains only one component. Optionally makes - * the slave interpreter safe. + * Creates a slave interpreter. The slavePath argument denotes the name + * of the new slave relative to the current interpreter; the slave is a + * direct descendant of the one-before-last component of the path, + * e.g. it is a descendant of the current interpreter if the slavePath + * argument contains only one component. Optionally makes the slave + * interpreter safe. * * Results: * Returns the interpreter structure created, or NULL if an error * occurred. * * Side effects: - * Creates a new interpreter and a new interpreter object command in - * the interpreter indicated by the slavePath argument. + * Creates a new interpreter and a new interpreter object command in the + * interpreter indicated by the slavePath argument. * *---------------------------------------------------------------------- */ Tcl_Interp * -Tcl_CreateSlave(interp, slavePath, isSafe) - Tcl_Interp *interp; /* Interpreter to start search at. */ - CONST char *slavePath; /* Name of slave to create. */ - int isSafe; /* Should new slave be "safe" ? */ +Tcl_CreateSlave( + Tcl_Interp *interp, /* Interpreter to start search at. */ + const char *slavePath, /* Name of slave to create. */ + int isSafe) /* Should new slave be "safe" ? */ { Tcl_Obj *pathPtr; Tcl_Interp *slaveInterp; @@ -1586,8 +2054,7 @@ Tcl_CreateSlave(interp, slavePath, isSafe) * Finds a slave interpreter by its path name. * * Results: - * Returns a Tcl_Interp * for the named interpreter or NULL if not - * found. + * Returns a Tcl_Interp * for the named interpreter or NULL if not found. * * Side effects: * None. @@ -1596,9 +2063,9 @@ Tcl_CreateSlave(interp, slavePath, isSafe) */ Tcl_Interp * -Tcl_GetSlave(interp, slavePath) - Tcl_Interp *interp; /* Interpreter to start search from. */ - CONST char *slavePath; /* Path of slave to find. */ +Tcl_GetSlave( + Tcl_Interp *interp, /* Interpreter to start search from. */ + const char *slavePath) /* Path of slave to find. */ { Tcl_Obj *pathPtr; Tcl_Interp *slaveInterp; @@ -1627,13 +2094,13 @@ Tcl_GetSlave(interp, slavePath) */ Tcl_Interp * -Tcl_GetMaster(interp) - Tcl_Interp *interp; /* Get the master of this interpreter. */ +Tcl_GetMaster( + Tcl_Interp *interp) /* Get the master of this interpreter. */ { Slave *slavePtr; /* Slave record of this interpreter. */ - if (interp == (Tcl_Interp *) NULL) { - return NULL; + if (interp == NULL) { + return NULL; } slavePtr = &((InterpInfo *) ((Interp *) interp)->interpInfo)->slave; return slavePtr->masterInterp; @@ -1642,22 +2109,86 @@ Tcl_GetMaster(interp) /* *---------------------------------------------------------------------- * + * TclSetSlaveCancelFlags -- + * + * This function marks all slave interpreters belonging to a given + * interpreter as being canceled or not canceled, depending on the + * provided flags. + * + * Results: + * None. + * + * Side effects: + * None. + * + *---------------------------------------------------------------------- + */ + +void +TclSetSlaveCancelFlags( + Tcl_Interp *interp, /* Set cancel flags of this interpreter. */ + int flags, /* Collection of OR-ed bits that control + * the cancellation of the script. Only + * TCL_CANCEL_UNWIND is currently + * supported. */ + int force) /* Non-zero to ignore numLevels for the purpose + * of resetting the cancellation flags. */ +{ + Master *masterPtr; /* Master record of given interpreter. */ + Tcl_HashEntry *hPtr; /* Search element. */ + Tcl_HashSearch hashSearch; /* Search variable. */ + Slave *slavePtr; /* Slave record of interpreter. */ + Interp *iPtr; + + if (interp == NULL) { + return; + } + + flags &= (CANCELED | TCL_CANCEL_UNWIND); + + masterPtr = &((InterpInfo *) ((Interp *) interp)->interpInfo)->master; + + hPtr = Tcl_FirstHashEntry(&masterPtr->slaveTable, &hashSearch); + for ( ; hPtr != NULL; hPtr = Tcl_NextHashEntry(&hashSearch)) { + slavePtr = Tcl_GetHashValue(hPtr); + iPtr = (Interp *) slavePtr->slaveInterp; + + if (iPtr == NULL) { + continue; + } + + if (flags == 0) { + TclResetCancellation((Tcl_Interp *) iPtr, force); + } else { + TclSetCancelFlags(iPtr, flags); + } + + /* + * Now, recursively handle this for the slaves of this slave + * interpreter. + */ + + TclSetSlaveCancelFlags((Tcl_Interp *) iPtr, flags, force); + } +} + +/* + *---------------------------------------------------------------------- + * * Tcl_GetInterpPath -- * * Sets the result of the asking interpreter to a proper Tcl list - * containing the names of interpreters between the asking and - * target interpreters. The target interpreter must be either the - * same as the asking interpreter or one of its slaves (including - * recursively). + * containing the names of interpreters between the asking and target + * interpreters. The target interpreter must be either the same as the + * asking interpreter or one of its slaves (including recursively). * * Results: - * TCL_OK if the target interpreter is the same as, or a descendant - * of, the asking interpreter; TCL_ERROR else. This way one can - * distinguish between the case where the asking and target interps - * are the same (an empty list is the result, and TCL_OK is returned) - * and when the target is not a descendant of the asking interpreter - * (in which case the Tcl result is an error message and the function - * returns TCL_ERROR). + * TCL_OK if the target interpreter is the same as, or a descendant of, + * the asking interpreter; TCL_ERROR else. This way one can distinguish + * between the case where the asking and target interps are the same (an + * empty list is the result, and TCL_OK is returned) and when the target + * is not a descendant of the asking interpreter (in which case the Tcl + * result is an error message and the function returns TCL_ERROR). * * Side effects: * None. @@ -1666,25 +2197,26 @@ Tcl_GetMaster(interp) */ int -Tcl_GetInterpPath(askingInterp, targetInterp) - Tcl_Interp *askingInterp; /* Interpreter to start search from. */ - Tcl_Interp *targetInterp; /* Interpreter to find. */ +Tcl_GetInterpPath( + Tcl_Interp *askingInterp, /* Interpreter to start search from. */ + Tcl_Interp *targetInterp) /* Interpreter to find. */ { InterpInfo *iiPtr; - + if (targetInterp == askingInterp) { - return TCL_OK; + Tcl_SetObjResult(askingInterp, Tcl_NewObj()); + return TCL_OK; } if (targetInterp == NULL) { return TCL_ERROR; } iiPtr = (InterpInfo *) ((Interp *) targetInterp)->interpInfo; - if (Tcl_GetInterpPath(askingInterp, iiPtr->slave.masterInterp) != TCL_OK) { - return TCL_ERROR; + if (Tcl_GetInterpPath(askingInterp, iiPtr->slave.masterInterp) != TCL_OK){ + return TCL_ERROR; } - Tcl_AppendElement(askingInterp, - Tcl_GetHashKey(&iiPtr->master.slaveTable, - iiPtr->slave.slaveEntryPtr)); + Tcl_ListObjAppendElement(NULL, Tcl_GetObjResult(askingInterp), + Tcl_NewStringObj(Tcl_GetHashKey(&iiPtr->master.slaveTable, + iiPtr->slave.slaveEntryPtr), -1)); return TCL_OK; } @@ -1697,7 +2229,7 @@ Tcl_GetInterpPath(askingInterp, targetInterp) * * Results: * Returns the slave interpreter known by that name in the calling - * interpreter, or NULL if no interpreter known by that name exists. + * interpreter, or NULL if no interpreter known by that name exists. * * Side effects: * Assigns to the pointer variable passed in, if not NULL. @@ -1706,41 +2238,42 @@ Tcl_GetInterpPath(askingInterp, targetInterp) */ static Tcl_Interp * -GetInterp(interp, pathPtr) - Tcl_Interp *interp; /* Interp. to start search from. */ - Tcl_Obj *pathPtr; /* List object containing name of interp. to +GetInterp( + Tcl_Interp *interp, /* Interp. to start search from. */ + Tcl_Obj *pathPtr) /* List object containing name of interp. to * be found. */ { Tcl_HashEntry *hPtr; /* Search element. */ Slave *slavePtr; /* Interim slave record. */ Tcl_Obj **objv; - int objc, i; + int objc, i; Tcl_Interp *searchInterp; /* Interim storage for interp. to find. */ InterpInfo *masterInfoPtr; - if (Tcl_ListObjGetElements(interp, pathPtr, &objc, &objv) != TCL_OK) { + if (TclListObjGetElements(interp, pathPtr, &objc, &objv) != TCL_OK) { return NULL; } searchInterp = interp; for (i = 0; i < objc; i++) { masterInfoPtr = (InterpInfo *) ((Interp *) searchInterp)->interpInfo; - hPtr = Tcl_FindHashEntry(&masterInfoPtr->master.slaveTable, - Tcl_GetString(objv[i])); - if (hPtr == NULL) { + hPtr = Tcl_FindHashEntry(&masterInfoPtr->master.slaveTable, + TclGetString(objv[i])); + if (hPtr == NULL) { searchInterp = NULL; break; } - slavePtr = (Slave *) Tcl_GetHashValue(hPtr); - searchInterp = slavePtr->slaveInterp; - if (searchInterp == NULL) { + slavePtr = Tcl_GetHashValue(hPtr); + searchInterp = slavePtr->slaveInterp; + if (searchInterp == NULL) { break; } } if (searchInterp == NULL) { - Tcl_AppendStringsToObj(Tcl_GetObjResult(interp), - "could not find interpreter \"", - Tcl_GetString(pathPtr), "\"", (char *) NULL); + Tcl_SetObjResult(interp, Tcl_ObjPrintf( + "could not find interpreter \"%s\"", TclGetString(pathPtr))); + Tcl_SetErrorCode(interp, "TCL", "LOOKUP", "INTERP", + TclGetString(pathPtr), NULL); } return searchInterp; } @@ -1748,11 +2281,53 @@ GetInterp(interp, pathPtr) /* *---------------------------------------------------------------------- * + * SlaveBgerror -- + * + * Helper function to set/query the background error handling command + * prefix of an interp + * + * Results: + * A standard Tcl result. + * + * Side effects: + * When (objc == 1), slaveInterp will be set to a new background handler + * of objv[0]. + * + *---------------------------------------------------------------------- + */ + +static int +SlaveBgerror( + Tcl_Interp *interp, /* Interp for error return. */ + Tcl_Interp *slaveInterp, /* Interp in which limit is set/queried. */ + int objc, /* Set or Query. */ + Tcl_Obj *const objv[]) /* Argument strings. */ +{ + if (objc) { + int length; + + if (TCL_ERROR == TclListObjLength(NULL, objv[0], &length) + || (length < 1)) { + Tcl_SetObjResult(interp, Tcl_NewStringObj( + "cmdPrefix must be list of length >= 1", -1)); + Tcl_SetErrorCode(interp, "TCL", "OPERATION", "INTERP", + "BGERRORFORMAT", NULL); + return TCL_ERROR; + } + TclSetBgErrorHandler(slaveInterp, objv[0]); + } + Tcl_SetObjResult(interp, TclGetBgErrorHandler(slaveInterp)); + return TCL_OK; +} + +/* + *---------------------------------------------------------------------- + * * SlaveCreate -- * - * Helper function to do the actual work of creating a slave interp - * and new object command. Also optionally makes the new slave - * interpreter "safe". + * Helper function to do the actual work of creating a slave interp and + * new object command. Also optionally makes the new slave interpreter + * "safe". * * Results: * Returns the new Tcl_Interp * if successful or NULL if not. If failed, @@ -1765,17 +2340,17 @@ GetInterp(interp, pathPtr) */ static Tcl_Interp * -SlaveCreate(interp, pathPtr, safe) - Tcl_Interp *interp; /* Interp. to start search from. */ - Tcl_Obj *pathPtr; /* Path (name) of slave to create. */ - int safe; /* Should we make it "safe"? */ +SlaveCreate( + Tcl_Interp *interp, /* Interp. to start search from. */ + Tcl_Obj *pathPtr, /* Path (name) of slave to create. */ + int safe) /* Should we make it "safe"? */ { Tcl_Interp *masterInterp, *slaveInterp; Slave *slavePtr; InterpInfo *masterInfoPtr; Tcl_HashEntry *hPtr; - char *path; - int new, objc; + const char *path; + int isNew, objc; Tcl_Obj **objv; if (Tcl_ListObjGetElements(interp, pathPtr, &objc, &objv) != TCL_OK) { @@ -1783,29 +2358,30 @@ SlaveCreate(interp, pathPtr, safe) } if (objc < 2) { masterInterp = interp; - path = Tcl_GetString(pathPtr); + path = TclGetString(pathPtr); } else { Tcl_Obj *objPtr; - + objPtr = Tcl_NewListObj(objc - 1, objv); masterInterp = GetInterp(interp, objPtr); Tcl_DecrRefCount(objPtr); if (masterInterp == NULL) { return NULL; } - path = Tcl_GetString(objv[objc - 1]); + path = TclGetString(objv[objc - 1]); } if (safe == 0) { safe = Tcl_IsSafe(masterInterp); } masterInfoPtr = (InterpInfo *) ((Interp *) masterInterp)->interpInfo; - hPtr = Tcl_CreateHashEntry(&masterInfoPtr->master.slaveTable, path, &new); - if (new == 0) { - Tcl_AppendStringsToObj(Tcl_GetObjResult(interp), - "interpreter named \"", path, - "\" already exists, cannot create", (char *) NULL); - return NULL; + hPtr = Tcl_CreateHashEntry(&masterInfoPtr->master.slaveTable, path, + &isNew); + if (isNew == 0) { + Tcl_SetObjResult(interp, Tcl_ObjPrintf( + "interpreter named \"%s\" already exists, cannot create", + path)); + return NULL; } slaveInterp = Tcl_CreateInterp(); @@ -1813,36 +2389,67 @@ SlaveCreate(interp, pathPtr, safe) slavePtr->masterInterp = masterInterp; slavePtr->slaveEntryPtr = hPtr; slavePtr->slaveInterp = slaveInterp; - slavePtr->interpCmd = Tcl_CreateObjCommand(masterInterp, path, - SlaveObjCmd, (ClientData) slaveInterp, SlaveObjCmdDeleteProc); + slavePtr->interpCmd = Tcl_NRCreateCommand(masterInterp, path, + SlaveObjCmd, NRSlaveCmd, slaveInterp, SlaveObjCmdDeleteProc); Tcl_InitHashTable(&slavePtr->aliasTable, TCL_STRING_KEYS); - Tcl_SetHashValue(hPtr, (ClientData) slavePtr); + Tcl_SetHashValue(hPtr, slavePtr); Tcl_SetVar(slaveInterp, "tcl_interactive", "0", TCL_GLOBAL_ONLY); - + /* * Inherit the recursion limit. */ + ((Interp *) slaveInterp)->maxNestingDepth = - ((Interp *) masterInterp)->maxNestingDepth ; + ((Interp *) masterInterp)->maxNestingDepth; if (safe) { - if (Tcl_MakeSafe(slaveInterp) == TCL_ERROR) { - goto error; - } + if (Tcl_MakeSafe(slaveInterp) == TCL_ERROR) { + goto error; + } } else { - if (Tcl_Init(slaveInterp) == TCL_ERROR) { - goto error; - } + if (Tcl_Init(slaveInterp) == TCL_ERROR) { + goto error; + } + /* - * This will create the "memory" command in slave interpreters - * if we compiled with TCL_MEM_DEBUG, otherwise it does nothing. + * This will create the "memory" command in slave interpreters if we + * compiled with TCL_MEM_DEBUG, otherwise it does nothing. */ + Tcl_InitMemory(slaveInterp); } + + /* + * Inherit the TIP#143 limits. + */ + + InheritLimitsFromMaster(slaveInterp, masterInterp); + + /* + * The [clock] command presents a safe API, but uses unsafe features in + * its implementation. This means it has to be implemented in safe interps + * as an alias to a version in the (trusted) master. + */ + + if (safe) { + Tcl_Obj *clockObj; + int status; + + TclNewLiteralStringObj(clockObj, "clock"); + Tcl_IncrRefCount(clockObj); + status = AliasCreate(interp, slaveInterp, masterInterp, clockObj, + clockObj, 0, NULL); + Tcl_DecrRefCount(clockObj); + if (status != TCL_OK) { + goto error2; + } + } + return slaveInterp; - error: - TclTransferResult(slaveInterp, TCL_ERROR, interp); + error: + Tcl_TransferResult(slaveInterp, TCL_ERROR, interp); + error2: Tcl_DeleteInterp(slaveInterp); return NULL; @@ -1853,8 +2460,8 @@ SlaveCreate(interp, pathPtr, safe) * * SlaveObjCmd -- * - * Command to manipulate an interpreter, e.g. to send commands to it - * to be evaluated. One such command exists for each slave interpreter. + * Command to manipulate an interpreter, e.g. to send commands to it to + * be evaluated. One such command exists for each slave interpreter. * * Results: * A standard Tcl result. @@ -1866,33 +2473,44 @@ SlaveCreate(interp, pathPtr, safe) */ static int -SlaveObjCmd(clientData, interp, objc, objv) - ClientData clientData; /* Slave interpreter. */ - Tcl_Interp *interp; /* Current interpreter. */ - int objc; /* Number of arguments. */ - Tcl_Obj *CONST objv[]; /* Argument objects. */ +SlaveObjCmd( + ClientData clientData, /* Slave interpreter. */ + Tcl_Interp *interp, /* Current interpreter. */ + int objc, /* Number of arguments. */ + Tcl_Obj *const objv[]) /* Argument objects. */ { - Tcl_Interp *slaveInterp; + return Tcl_NRCallObjProc(interp, NRSlaveCmd, clientData, objc, objv); +} + +static int +NRSlaveCmd( + ClientData clientData, /* Slave interpreter. */ + Tcl_Interp *interp, /* Current interpreter. */ + int objc, /* Number of arguments. */ + Tcl_Obj *const objv[]) /* Argument objects. */ +{ + Tcl_Interp *slaveInterp = clientData; int index; - static CONST char *options[] = { - "alias", "aliases", "eval", "expose", - "hide", "hidden", "issafe", "invokehidden", - "marktrusted", "recursionlimit", NULL + static const char *const options[] = { + "alias", "aliases", "bgerror", "debug", + "eval", "expose", "hide", "hidden", + "issafe", "invokehidden", "limit", "marktrusted", + "recursionlimit", NULL }; enum options { - OPT_ALIAS, OPT_ALIASES, OPT_EVAL, OPT_EXPOSE, - OPT_HIDE, OPT_HIDDEN, OPT_ISSAFE, OPT_INVOKEHIDDEN, - OPT_MARKTRUSTED, OPT_RECLIMIT + OPT_ALIAS, OPT_ALIASES, OPT_BGERROR, OPT_DEBUG, + OPT_EVAL, OPT_EXPOSE, OPT_HIDE, OPT_HIDDEN, + OPT_ISSAFE, OPT_INVOKEHIDDEN, OPT_LIMIT, OPT_MARKTRUSTED, + OPT_RECLIMIT }; - - slaveInterp = (Tcl_Interp *) clientData; + if (slaveInterp == NULL) { - panic("SlaveObjCmd: interpreter has been deleted"); + Tcl_Panic("SlaveObjCmd: interpreter has been deleted"); } if (objc < 2) { - Tcl_WrongNumArgs(interp, 1, objv, "cmd ?arg ...?"); - return TCL_ERROR; + Tcl_WrongNumArgs(interp, 1, objv, "cmd ?arg ...?"); + return TCL_ERROR; } if (Tcl_GetIndexFromObj(interp, objv[1], options, "option", 0, &index) != TCL_OK) { @@ -1900,114 +2518,152 @@ SlaveObjCmd(clientData, interp, objc, objv) } switch ((enum options) index) { - case OPT_ALIAS: { - if (objc > 2) { - if (objc == 3) { - return AliasDescribe(interp, slaveInterp, objv[2]); - } - if (Tcl_GetString(objv[3])[0] == '\0') { - if (objc == 4) { - return AliasDelete(interp, slaveInterp, objv[2]); - } - } else { - return AliasCreate(interp, slaveInterp, interp, objv[2], - objv[3], objc - 4, objv + 4); + case OPT_ALIAS: + if (objc > 2) { + if (objc == 3) { + return AliasDescribe(interp, slaveInterp, objv[2]); + } + if (TclGetString(objv[3])[0] == '\0') { + if (objc == 4) { + return AliasDelete(interp, slaveInterp, objv[2]); } + } else { + return AliasCreate(interp, slaveInterp, interp, objv[2], + objv[3], objc - 4, objv + 4); } - Tcl_WrongNumArgs(interp, 2, objv, - "aliasName ?targetName? ?args..?"); - return TCL_ERROR; } - case OPT_ALIASES: { - if (objc != 2) { - Tcl_WrongNumArgs(interp, 2, objv, (char *) NULL); - return TCL_ERROR; - } - return AliasList(interp, slaveInterp); + Tcl_WrongNumArgs(interp, 2, objv, "aliasName ?targetName? ?arg ...?"); + return TCL_ERROR; + case OPT_ALIASES: + if (objc != 2) { + Tcl_WrongNumArgs(interp, 2, objv, NULL); + return TCL_ERROR; } - case OPT_EVAL: { - if (objc < 3) { - Tcl_WrongNumArgs(interp, 2, objv, "arg ?arg ...?"); - return TCL_ERROR; - } - return SlaveEval(interp, slaveInterp, objc - 2, objv + 2); + return AliasList(interp, slaveInterp); + case OPT_BGERROR: + if (objc != 2 && objc != 3) { + Tcl_WrongNumArgs(interp, 2, objv, "?cmdPrefix?"); + return TCL_ERROR; } - case OPT_EXPOSE: { - if ((objc < 3) || (objc > 4)) { - Tcl_WrongNumArgs(interp, 2, objv, "hiddenCmdName ?cmdName?"); - return TCL_ERROR; - } - return SlaveExpose(interp, slaveInterp, objc - 2, objv + 2); + return SlaveBgerror(interp, slaveInterp, objc - 2, objv + 2); + case OPT_DEBUG: + /* + * TIP #378 + * Currently only -frame supported, otherwise ?-option ?value? ...? + */ + if (objc > 4) { + Tcl_WrongNumArgs(interp, 2, objv, "?-frame ?bool??"); + return TCL_ERROR; } - case OPT_HIDE: { - if ((objc < 3) || (objc > 4)) { - Tcl_WrongNumArgs(interp, 2, objv, "cmdName ?hiddenCmdName?"); - return TCL_ERROR; - } - return SlaveHide(interp, slaveInterp, objc - 2, objv + 2); + return SlaveDebugCmd(interp, slaveInterp, objc - 2, objv + 2); + case OPT_EVAL: + if (objc < 3) { + Tcl_WrongNumArgs(interp, 2, objv, "arg ?arg ...?"); + return TCL_ERROR; } - case OPT_HIDDEN: { - if (objc != 2) { - Tcl_WrongNumArgs(interp, 2, objv, NULL); - return TCL_ERROR; - } - return SlaveHidden(interp, slaveInterp); + return SlaveEval(interp, slaveInterp, objc - 2, objv + 2); + case OPT_EXPOSE: + if ((objc < 3) || (objc > 4)) { + Tcl_WrongNumArgs(interp, 2, objv, "hiddenCmdName ?cmdName?"); + return TCL_ERROR; } - case OPT_ISSAFE: { - if (objc != 2) { - Tcl_WrongNumArgs(interp, 2, objv, (char *) NULL); + return SlaveExpose(interp, slaveInterp, objc - 2, objv + 2); + case OPT_HIDE: + if ((objc < 3) || (objc > 4)) { + Tcl_WrongNumArgs(interp, 2, objv, "cmdName ?hiddenCmdName?"); + return TCL_ERROR; + } + return SlaveHide(interp, slaveInterp, objc - 2, objv + 2); + case OPT_HIDDEN: + if (objc != 2) { + Tcl_WrongNumArgs(interp, 2, objv, NULL); + return TCL_ERROR; + } + return SlaveHidden(interp, slaveInterp); + case OPT_ISSAFE: + if (objc != 2) { + Tcl_WrongNumArgs(interp, 2, objv, NULL); + return TCL_ERROR; + } + Tcl_SetObjResult(interp, Tcl_NewBooleanObj(Tcl_IsSafe(slaveInterp))); + return TCL_OK; + case OPT_INVOKEHIDDEN: { + int i; + const char *namespaceName; + static const char *const hiddenOptions[] = { + "-global", "-namespace", "--", NULL + }; + enum hiddenOption { + OPT_GLOBAL, OPT_NAMESPACE, OPT_LAST + }; + + namespaceName = NULL; + for (i = 2; i < objc; i++) { + if (TclGetString(objv[i])[0] != '-') { + break; + } + if (Tcl_GetIndexFromObj(interp, objv[i], hiddenOptions, "option", + 0, &index) != TCL_OK) { return TCL_ERROR; } - Tcl_SetIntObj(Tcl_GetObjResult(interp), Tcl_IsSafe(slaveInterp)); - return TCL_OK; - } - case OPT_INVOKEHIDDEN: { - int global, i, index; - static CONST char *hiddenOptions[] = { - "-global", "--", NULL - }; - enum hiddenOption { - OPT_GLOBAL, OPT_LAST - }; - global = 0; - for (i = 2; i < objc; i++) { - if (Tcl_GetString(objv[i])[0] != '-') { + if (index == OPT_GLOBAL) { + namespaceName = "::"; + } else if (index == OPT_NAMESPACE) { + if (++i == objc) { /* There must be more arguments. */ break; - } - if (Tcl_GetIndexFromObj(interp, objv[i], hiddenOptions, - "option", 0, &index) != TCL_OK) { - return TCL_ERROR; - } - if (index == OPT_GLOBAL) { - global = 1; } else { - i++; - break; + namespaceName = TclGetString(objv[i]); } + } else { + i++; + break; } - if (objc - i < 1) { - Tcl_WrongNumArgs(interp, 2, objv, - "?-global? ?--? cmd ?arg ..?"); - return TCL_ERROR; - } - return SlaveInvokeHidden(interp, slaveInterp, global, objc - i, - objv + i); } - case OPT_MARKTRUSTED: { - if (objc != 2) { - Tcl_WrongNumArgs(interp, 2, objv, NULL); - return TCL_ERROR; - } - return SlaveMarkTrusted(interp, slaveInterp); + if (objc - i < 1) { + Tcl_WrongNumArgs(interp, 2, objv, + "?-namespace ns? ?-global? ?--? cmd ?arg ..?"); + return TCL_ERROR; } - case OPT_RECLIMIT: { - if (objc != 2 && objc != 3) { - Tcl_WrongNumArgs(interp, 2, objv, "?newlimit?"); - return TCL_ERROR; - } - return SlaveRecursionLimit(interp, slaveInterp, objc - 2, objv + 2); + return SlaveInvokeHidden(interp, slaveInterp, namespaceName, + objc - i, objv + i); + } + case OPT_LIMIT: { + static const char *const limitTypes[] = { + "commands", "time", NULL + }; + enum LimitTypes { + LIMIT_TYPE_COMMANDS, LIMIT_TYPE_TIME + }; + int limitType; + + if (objc < 3) { + Tcl_WrongNumArgs(interp, 2, objv, "limitType ?-option value ...?"); + return TCL_ERROR; + } + if (Tcl_GetIndexFromObj(interp, objv[2], limitTypes, "limit type", 0, + &limitType) != TCL_OK) { + return TCL_ERROR; + } + switch ((enum LimitTypes) limitType) { + case LIMIT_TYPE_COMMANDS: + return SlaveCommandLimitCmd(interp, slaveInterp, 3, objc,objv); + case LIMIT_TYPE_TIME: + return SlaveTimeLimitCmd(interp, slaveInterp, 3, objc, objv); } } + case OPT_MARKTRUSTED: + if (objc != 2) { + Tcl_WrongNumArgs(interp, 2, objv, NULL); + return TCL_ERROR; + } + return SlaveMarkTrusted(interp, slaveInterp); + case OPT_RECLIMIT: + if (objc != 2 && objc != 3) { + Tcl_WrongNumArgs(interp, 2, objv, "?newlimit?"); + return TCL_ERROR; + } + return SlaveRecursionLimit(interp, slaveInterp, objc - 2, objv + 2); + } return TCL_ERROR; } @@ -2025,20 +2681,20 @@ SlaveObjCmd(clientData, interp, objc, objv) * None. * * Side effects: - * Cleans up all state associated with the slave interpreter and - * destroys the slave interpreter. + * Cleans up all state associated with the slave interpreter and destroys + * the slave interpreter. * *---------------------------------------------------------------------- */ static void -SlaveObjCmdDeleteProc(clientData) - ClientData clientData; /* The SlaveRecord for the command. */ +SlaveObjCmdDeleteProc( + ClientData clientData) /* The SlaveRecord for the command. */ { - Slave *slavePtr; /* Interim storage for Slave record. */ - Tcl_Interp *slaveInterp; /* And for a slave interp. */ + Slave *slavePtr; /* Interim storage for Slave record. */ + Tcl_Interp *slaveInterp = clientData; + /* And for a slave interp. */ - slaveInterp = (Tcl_Interp *) clientData; slavePtr = &((InterpInfo *) ((Interp *) slaveInterp)->interpInfo)->slave; /* @@ -2048,9 +2704,9 @@ SlaveObjCmdDeleteProc(clientData) Tcl_DeleteHashEntry(slavePtr->slaveEntryPtr); /* - * Set to NULL so that when the InterpInfo is cleaned up in the slave - * it does not try to delete the command causing all sorts of grief. - * See SlaveRecordDeleteProc(). + * Set to NULL so that when the InterpInfo is cleaned up in the slave it + * does not try to delete the command causing all sorts of grief. See + * SlaveRecordDeleteProc(). */ slavePtr->interpCmd = NULL; @@ -2063,6 +2719,77 @@ SlaveObjCmdDeleteProc(clientData) /* *---------------------------------------------------------------------- * + * SlaveDebugCmd -- TIP #378 + * + * Helper function to handle 'debug' command in a slave interpreter. + * + * Results: + * A standard Tcl result. + * + * Side effects: + * May modify INTERP_DEBUG_FRAME flag in the slave. + * + *---------------------------------------------------------------------- + */ + +static int +SlaveDebugCmd( + Tcl_Interp *interp, /* Interp for error return. */ + Tcl_Interp *slaveInterp, /* The slave interpreter in which command + * will be evaluated. */ + int objc, /* Number of arguments. */ + Tcl_Obj *const objv[]) /* Argument objects. */ +{ + static const char *const debugTypes[] = { + "-frame", NULL + }; + enum DebugTypes { + DEBUG_TYPE_FRAME + }; + int debugType; + Interp *iPtr; + Tcl_Obj *resultPtr; + + iPtr = (Interp *) slaveInterp; + if (objc == 0) { + resultPtr = Tcl_NewObj(); + Tcl_ListObjAppendElement(NULL, resultPtr, + Tcl_NewStringObj("-frame", -1)); + Tcl_ListObjAppendElement(NULL, resultPtr, + Tcl_NewBooleanObj(iPtr->flags & INTERP_DEBUG_FRAME)); + Tcl_SetObjResult(interp, resultPtr); + } else { + if (Tcl_GetIndexFromObj(interp, objv[0], debugTypes, "debug option", + 0, &debugType) != TCL_OK) { + return TCL_ERROR; + } + if (debugType == DEBUG_TYPE_FRAME) { + if (objc == 2) { /* set */ + if (Tcl_GetBooleanFromObj(interp, objv[1], &debugType) + != TCL_OK) { + return TCL_ERROR; + } + + /* + * Quietly ignore attempts to disable interp debugging. This + * is a one-way switch as frame debug info is maintained in a + * stack that must be consistent once turned on. + */ + + if (debugType) { + iPtr->flags |= INTERP_DEBUG_FRAME; + } + } + Tcl_SetObjResult(interp, + Tcl_NewBooleanObj(iPtr->flags & INTERP_DEBUG_FRAME)); + } + } + return TCL_OK; +} + +/* + *---------------------------------------------------------------------- + * * SlaveEval -- * * Helper function to evaluate a command in a slave interpreter. @@ -2077,30 +2804,49 @@ SlaveObjCmdDeleteProc(clientData) */ static int -SlaveEval(interp, slaveInterp, objc, objv) - Tcl_Interp *interp; /* Interp for error return. */ - Tcl_Interp *slaveInterp; /* The slave interpreter in which command +SlaveEval( + Tcl_Interp *interp, /* Interp for error return. */ + Tcl_Interp *slaveInterp, /* The slave interpreter in which command * will be evaluated. */ - int objc; /* Number of arguments. */ - Tcl_Obj *CONST objv[]; /* Argument objects. */ + int objc, /* Number of arguments. */ + Tcl_Obj *const objv[]) /* Argument objects. */ { int result; - Tcl_Obj *objPtr; - - Tcl_Preserve((ClientData) slaveInterp); + + /* + * TIP #285: If necessary, reset the cancellation flags for the slave + * interpreter now; otherwise, canceling a script in a master interpreter + * can result in a situation where a slave interpreter can no longer + * evaluate any scripts unless somebody calls the TclResetCancellation + * function for that particular Tcl_Interp. + */ + + TclSetSlaveCancelFlags(slaveInterp, 0, 0); + + Tcl_Preserve(slaveInterp); Tcl_AllowExceptions(slaveInterp); if (objc == 1) { - result = Tcl_EvalObjEx(slaveInterp, objv[0], 0); + /* + * TIP #280: Make actual argument location available to eval'd script. + */ + + Interp *iPtr = (Interp *) interp; + CmdFrame *invoker = iPtr->cmdFramePtr; + int word = 0; + + TclArgumentGet(interp, objv[0], &invoker, &word); + + result = TclEvalObjEx(slaveInterp, objv[0], 0, invoker, word); } else { - objPtr = Tcl_ConcatObj(objc, objv); + Tcl_Obj *objPtr = Tcl_ConcatObj(objc, objv); Tcl_IncrRefCount(objPtr); result = Tcl_EvalObjEx(slaveInterp, objPtr, 0); Tcl_DecrRefCount(objPtr); } - TclTransferResult(slaveInterp, result, interp); + Tcl_TransferResult(slaveInterp, result, interp); - Tcl_Release((ClientData) slaveInterp); + Tcl_Release(slaveInterp); return result; } @@ -2115,32 +2861,34 @@ SlaveEval(interp, slaveInterp, objc, objv) * A standard Tcl result. * * Side effects: - * After this call scripts in the slave will be able to invoke - * the newly exposed command. + * After this call scripts in the slave will be able to invoke the newly + * exposed command. * *---------------------------------------------------------------------- */ static int -SlaveExpose(interp, slaveInterp, objc, objv) - Tcl_Interp *interp; /* Interp for error return. */ - Tcl_Interp *slaveInterp; /* Interp in which command will be exposed. */ - int objc; /* Number of arguments. */ - Tcl_Obj *CONST objv[]; /* Argument strings. */ -{ - char *name; - +SlaveExpose( + Tcl_Interp *interp, /* Interp for error return. */ + Tcl_Interp *slaveInterp, /* Interp in which command will be exposed. */ + int objc, /* Number of arguments. */ + Tcl_Obj *const objv[]) /* Argument strings. */ +{ + const char *name; + if (Tcl_IsSafe(interp)) { - Tcl_AppendStringsToObj(Tcl_GetObjResult(interp), + Tcl_SetObjResult(interp, Tcl_NewStringObj( "permission denied: safe interpreter cannot expose commands", - (char *) NULL); + -1)); + Tcl_SetErrorCode(interp, "TCL", "OPERATION", "INTERP", "UNSAFE", + NULL); return TCL_ERROR; } - name = Tcl_GetString(objv[(objc == 1) ? 0 : 1]); - if (Tcl_ExposeCommand(slaveInterp, Tcl_GetString(objv[0]), + name = TclGetString(objv[(objc == 1) ? 0 : 1]); + if (Tcl_ExposeCommand(slaveInterp, TclGetString(objv[0]), name) != TCL_OK) { - TclTransferResult(slaveInterp, TCL_ERROR, interp); + Tcl_TransferResult(slaveInterp, TCL_ERROR, interp); return TCL_ERROR; } return TCL_OK; @@ -2157,36 +2905,38 @@ SlaveExpose(interp, slaveInterp, objc, objv) * A standard Tcl result. * * Side effects: - * When (objc == 1), slaveInterp will be set to a new recursion - * limit of objv[0]. + * When (objc == 1), slaveInterp will be set to a new recursion limit of + * objv[0]. * *---------------------------------------------------------------------- */ static int -SlaveRecursionLimit(interp, slaveInterp, objc, objv) - Tcl_Interp *interp; /* Interp for error return. */ - Tcl_Interp *slaveInterp; /* Interp in which limit is set/queried. */ - int objc; /* Set or Query. */ - Tcl_Obj *CONST objv[]; /* Argument strings. */ +SlaveRecursionLimit( + Tcl_Interp *interp, /* Interp for error return. */ + Tcl_Interp *slaveInterp, /* Interp in which limit is set/queried. */ + int objc, /* Set or Query. */ + Tcl_Obj *const objv[]) /* Argument strings. */ { Interp *iPtr; int limit; if (objc) { if (Tcl_IsSafe(interp)) { - Tcl_AppendStringsToObj(Tcl_GetObjResult(interp), - "permission denied: ", - "safe interpreters cannot change recursion limit", - (char *) NULL); + Tcl_SetObjResult(interp, Tcl_NewStringObj("permission denied: " + "safe interpreters cannot change recursion limit", -1)); + Tcl_SetErrorCode(interp, "TCL", "OPERATION", "INTERP", "UNSAFE", + NULL); return TCL_ERROR; } - if (Tcl_GetIntFromObj(interp, objv[0], &limit) == TCL_ERROR) { + if (TclGetIntFromObj(interp, objv[0], &limit) == TCL_ERROR) { return TCL_ERROR; } if (limit <= 0) { Tcl_SetObjResult(interp, Tcl_NewStringObj( "recursion limit must be > 0", -1)); + Tcl_SetErrorCode(interp, "TCL", "OPERATION", "INTERP", "BADLIMIT", + NULL); return TCL_ERROR; } Tcl_SetRecursionLimit(slaveInterp, limit); @@ -2194,14 +2944,15 @@ SlaveRecursionLimit(interp, slaveInterp, objc, objv) if (interp == slaveInterp && iPtr->numLevels > limit) { Tcl_SetObjResult(interp, Tcl_NewStringObj( "falling back due to new recursion limit", -1)); + Tcl_SetErrorCode(interp, "TCL", "RECURSION", NULL); return TCL_ERROR; } Tcl_SetObjResult(interp, objv[0]); - return TCL_OK; + return TCL_OK; } else { limit = Tcl_SetRecursionLimit(slaveInterp, 0); Tcl_SetObjResult(interp, Tcl_NewIntObj(limit)); - return TCL_OK; + return TCL_OK; } } @@ -2216,32 +2967,33 @@ SlaveRecursionLimit(interp, slaveInterp, objc, objv) * A standard Tcl result. * * Side effects: - * After this call scripts in the slave will no longer be able - * to invoke the named command. + * After this call scripts in the slave will no longer be able to invoke + * the named command. * *---------------------------------------------------------------------- */ static int -SlaveHide(interp, slaveInterp, objc, objv) - Tcl_Interp *interp; /* Interp for error return. */ - Tcl_Interp *slaveInterp; /* Interp in which command will be exposed. */ - int objc; /* Number of arguments. */ - Tcl_Obj *CONST objv[]; /* Argument strings. */ -{ - char *name; - +SlaveHide( + Tcl_Interp *interp, /* Interp for error return. */ + Tcl_Interp *slaveInterp, /* Interp in which command will be exposed. */ + int objc, /* Number of arguments. */ + Tcl_Obj *const objv[]) /* Argument strings. */ +{ + const char *name; + if (Tcl_IsSafe(interp)) { - Tcl_AppendStringsToObj(Tcl_GetObjResult(interp), + Tcl_SetObjResult(interp, Tcl_NewStringObj( "permission denied: safe interpreter cannot hide commands", - (char *) NULL); + -1)); + Tcl_SetErrorCode(interp, "TCL", "OPERATION", "INTERP", "UNSAFE", + NULL); return TCL_ERROR; } - name = Tcl_GetString(objv[(objc == 1) ? 0 : 1]); - if (Tcl_HideCommand(slaveInterp, Tcl_GetString(objv[0]), - name) != TCL_OK) { - TclTransferResult(slaveInterp, TCL_ERROR, interp); + name = TclGetString(objv[(objc == 1) ? 0 : 1]); + if (Tcl_HideCommand(slaveInterp, TclGetString(objv[0]), name) != TCL_OK) { + Tcl_TransferResult(slaveInterp, TCL_ERROR, interp); return TCL_ERROR; } return TCL_OK; @@ -2265,26 +3017,25 @@ SlaveHide(interp, slaveInterp, objc, objv) */ static int -SlaveHidden(interp, slaveInterp) - Tcl_Interp *interp; /* Interp for data return. */ - Tcl_Interp *slaveInterp; /* Interp whose hidden commands to query. */ +SlaveHidden( + Tcl_Interp *interp, /* Interp for data return. */ + Tcl_Interp *slaveInterp) /* Interp whose hidden commands to query. */ { - Tcl_Obj *listObjPtr; /* Local object pointer. */ + Tcl_Obj *listObjPtr = Tcl_NewObj(); /* Local object pointer. */ Tcl_HashTable *hTblPtr; /* For local searches. */ Tcl_HashEntry *hPtr; /* For local searches. */ Tcl_HashSearch hSearch; /* For local searches. */ - - listObjPtr = Tcl_GetObjResult(interp); + hTblPtr = ((Interp *) slaveInterp)->hiddenCmdTablePtr; - if (hTblPtr != (Tcl_HashTable *) NULL) { + if (hTblPtr != NULL) { for (hPtr = Tcl_FirstHashEntry(hTblPtr, &hSearch); - hPtr != (Tcl_HashEntry *) NULL; - hPtr = Tcl_NextHashEntry(&hSearch)) { - + hPtr != NULL; + hPtr = Tcl_NextHashEntry(&hSearch)) { Tcl_ListObjAppendElement(NULL, listObjPtr, Tcl_NewStringObj(Tcl_GetHashKey(hTblPtr, hPtr), -1)); } } + Tcl_SetObjResult(interp, listObjPtr); return TCL_OK; } @@ -2305,37 +3056,68 @@ SlaveHidden(interp, slaveInterp) */ static int -SlaveInvokeHidden(interp, slaveInterp, global, objc, objv) - Tcl_Interp *interp; /* Interp for error return. */ - Tcl_Interp *slaveInterp; /* The slave interpreter in which command - * will be invoked. */ - int global; /* Non-zero to invoke in global namespace. */ - int objc; /* Number of arguments. */ - Tcl_Obj *CONST objv[]; /* Argument objects. */ +SlaveInvokeHidden( + Tcl_Interp *interp, /* Interp for error return. */ + Tcl_Interp *slaveInterp, /* The slave interpreter in which command will + * be invoked. */ + const char *namespaceName, /* The namespace to use, if any. */ + int objc, /* Number of arguments. */ + Tcl_Obj *const objv[]) /* Argument objects. */ { int result; - + if (Tcl_IsSafe(interp)) { - Tcl_SetStringObj(Tcl_GetObjResult(interp), + Tcl_SetObjResult(interp, Tcl_NewStringObj( "not allowed to invoke hidden commands from safe interpreter", - -1); + -1)); + Tcl_SetErrorCode(interp, "TCL", "OPERATION", "INTERP", "UNSAFE", + NULL); return TCL_ERROR; } - Tcl_Preserve((ClientData) slaveInterp); + Tcl_Preserve(slaveInterp); Tcl_AllowExceptions(slaveInterp); - - if (global) { - result = TclObjInvokeGlobal(slaveInterp, objc, objv, - TCL_INVOKE_HIDDEN); + + if (namespaceName == NULL) { + NRE_callback *rootPtr = TOP_CB(slaveInterp); + + Tcl_NRAddCallback(interp, NRPostInvokeHidden, slaveInterp, + rootPtr, NULL, NULL); + return TclNRInvoke(NULL, slaveInterp, objc, objv); } else { - result = TclObjInvoke(slaveInterp, objc, objv, TCL_INVOKE_HIDDEN); + Namespace *nsPtr, *dummy1, *dummy2; + const char *tail; + + result = TclGetNamespaceForQualName(slaveInterp, namespaceName, NULL, + TCL_FIND_ONLY_NS | TCL_GLOBAL_ONLY | TCL_LEAVE_ERR_MSG + | TCL_CREATE_NS_IF_UNKNOWN, &nsPtr, &dummy1, &dummy2, &tail); + if (result == TCL_OK) { + result = TclObjInvokeNamespace(slaveInterp, objc, objv, + (Tcl_Namespace *) nsPtr, TCL_INVOKE_HIDDEN); + } } - TclTransferResult(slaveInterp, result, interp); + Tcl_TransferResult(slaveInterp, result, interp); + + Tcl_Release(slaveInterp); + return result; +} + +static int +NRPostInvokeHidden( + ClientData data[], + Tcl_Interp *interp, + int result) +{ + Tcl_Interp *slaveInterp = (Tcl_Interp *)data[0]; + NRE_callback *rootPtr = (NRE_callback *)data[1]; - Tcl_Release((ClientData) slaveInterp); - return result; + if (interp != slaveInterp) { + result = TclNRRunCallbacks(slaveInterp, result, rootPtr); + Tcl_TransferResult(slaveInterp, result, interp); + } + Tcl_Release(slaveInterp); + return result; } /* @@ -2349,22 +3131,24 @@ SlaveInvokeHidden(interp, slaveInterp, global, objc, objv) * A standard Tcl result. * * Side effects: - * After this call the hard-wired security checks in the core no - * longer prevent the slave from performing certain operations. + * After this call the hard-wired security checks in the core no longer + * prevent the slave from performing certain operations. * *---------------------------------------------------------------------- */ static int -SlaveMarkTrusted(interp, slaveInterp) - Tcl_Interp *interp; /* Interp for error return. */ - Tcl_Interp *slaveInterp; /* The slave interpreter which will be - * marked trusted. */ +SlaveMarkTrusted( + Tcl_Interp *interp, /* Interp for error return. */ + Tcl_Interp *slaveInterp) /* The slave interpreter which will be marked + * trusted. */ { if (Tcl_IsSafe(interp)) { - Tcl_AppendStringsToObj(Tcl_GetObjResult(interp), + Tcl_SetObjResult(interp, Tcl_NewStringObj( "permission denied: safe interpreter cannot mark trusted", - (char *) NULL); + -1)); + Tcl_SetErrorCode(interp, "TCL", "OPERATION", "INTERP", "UNSAFE", + NULL); return TCL_ERROR; } ((Interp *) slaveInterp)->flags &= ~SAFE_INTERP; @@ -2388,17 +3172,15 @@ SlaveMarkTrusted(interp, slaveInterp) */ int -Tcl_IsSafe(interp) - Tcl_Interp *interp; /* Is this interpreter "safe" ? */ +Tcl_IsSafe( + Tcl_Interp *interp) /* Is this interpreter "safe" ? */ { - Interp *iPtr; + Interp *iPtr = (Interp *) interp; - if (interp == (Tcl_Interp *) NULL) { - return 0; + if (iPtr == NULL) { + return 0; } - iPtr = (Interp *) interp; - - return ( (iPtr->flags) & SAFE_INTERP ) ? 1 : 0 ; + return (iPtr->flags & SAFE_INTERP) ? 1 : 0; } /* @@ -2407,34 +3189,50 @@ Tcl_IsSafe(interp) * Tcl_MakeSafe -- * * Makes its argument interpreter contain only functionality that is - * defined to be part of Safe Tcl. Unsafe commands are hidden, the - * env array is unset, and the standard channels are removed. + * defined to be part of Safe Tcl. Unsafe commands are hidden, the env + * array is unset, and the standard channels are removed. * * Results: * None. * * Side effects: - * Hides commands in its argument interpreter, and removes settings - * and channels. + * Hides commands in its argument interpreter, and removes settings and + * channels. * *---------------------------------------------------------------------- */ int -Tcl_MakeSafe(interp) - Tcl_Interp *interp; /* Interpreter to be made safe. */ +Tcl_MakeSafe( + Tcl_Interp *interp) /* Interpreter to be made safe. */ { - Tcl_Channel chan; /* Channel to remove from - * safe interpreter. */ + Tcl_Channel chan; /* Channel to remove from safe interpreter. */ Interp *iPtr = (Interp *) interp; + Tcl_Interp *master = ((InterpInfo*) iPtr->interpInfo)->slave.masterInterp; TclHideUnsafeCommands(interp); - + + if (master != NULL) { + /* + * Alias these function implementations in the slave to those in the + * master; the overall implementations are safe, but they're normally + * defined by init.tcl which is not sourced by safe interpreters. + * Assume these functions all work. [Bug 2895741] + */ + + (void) Tcl_Eval(interp, + "namespace eval ::tcl {namespace eval mathfunc {}}"); + (void) Tcl_CreateAlias(interp, "::tcl::mathfunc::min", master, + "::tcl::mathfunc::min", 0, NULL); + (void) Tcl_CreateAlias(interp, "::tcl::mathfunc::max", master, + "::tcl::mathfunc::max", 0, NULL); + } + iPtr->flags |= SAFE_INTERP; /* - * Unsetting variables : (which should not have been set - * in the first place, but...) + * Unsetting variables : (which should not have been set in the first + * place, but...) */ /* @@ -2443,7 +3241,7 @@ Tcl_MakeSafe(interp) Tcl_UnsetVar(interp, "env", TCL_GLOBAL_ONLY); - /* + /* * Remove unsafe parts of tcl_platform */ @@ -2453,37 +3251,1600 @@ Tcl_MakeSafe(interp) Tcl_UnsetVar2(interp, "tcl_platform", "user", TCL_GLOBAL_ONLY); /* - * Unset path informations variables - * (the only one remaining is [info nameofexecutable]) + * Unset path informations variables (the only one remaining is [info + * nameofexecutable]) */ Tcl_UnsetVar(interp, "tclDefaultLibrary", TCL_GLOBAL_ONLY); Tcl_UnsetVar(interp, "tcl_library", TCL_GLOBAL_ONLY); Tcl_UnsetVar(interp, "tcl_pkgPath", TCL_GLOBAL_ONLY); - + /* - * Remove the standard channels from the interpreter; safe interpreters - * do not ordinarily have access to stdin, stdout and stderr. + * Remove the standard channels from the interpreter; safe interpreters do + * not ordinarily have access to stdin, stdout and stderr. * * NOTE: These channels are not added to the interpreter by the * Tcl_CreateInterp call, but may be added later, by another I/O - * operation. We want to ensure that the interpreter does not have - * these channels even if it is being made safe after being used for - * some time.. + * operation. We want to ensure that the interpreter does not have these + * channels even if it is being made safe after being used for some time.. */ chan = Tcl_GetStdChannel(TCL_STDIN); - if (chan != (Tcl_Channel) NULL) { - Tcl_UnregisterChannel(interp, chan); + if (chan != NULL) { + Tcl_UnregisterChannel(interp, chan); } chan = Tcl_GetStdChannel(TCL_STDOUT); - if (chan != (Tcl_Channel) NULL) { - Tcl_UnregisterChannel(interp, chan); + if (chan != NULL) { + Tcl_UnregisterChannel(interp, chan); } chan = Tcl_GetStdChannel(TCL_STDERR); - if (chan != (Tcl_Channel) NULL) { - Tcl_UnregisterChannel(interp, chan); + if (chan != NULL) { + Tcl_UnregisterChannel(interp, chan); } return TCL_OK; } + +/* + *---------------------------------------------------------------------- + * + * Tcl_LimitExceeded -- + * + * Tests whether any limit has been exceeded in the given interpreter + * (i.e. whether the interpreter is currently unable to process further + * scripts). + * + * Results: + * A boolean value. + * + * Side effects: + * None. + * + * Notes: + * If you change this function, you MUST also update TclLimitExceeded() in + * tclInt.h. + *---------------------------------------------------------------------- + */ + +int +Tcl_LimitExceeded( + Tcl_Interp *interp) +{ + register Interp *iPtr = (Interp *) interp; + + return iPtr->limit.exceeded != 0; +} + +/* + *---------------------------------------------------------------------- + * + * Tcl_LimitReady -- + * + * Find out whether any limit has been set on the interpreter, and if so + * check whether the granularity of that limit is such that the full + * limit check should be carried out. + * + * Results: + * A boolean value that indicates whether to call Tcl_LimitCheck. + * + * Side effects: + * Increments the limit granularity counter. + * + * Notes: + * If you change this function, you MUST also update TclLimitReady() in + * tclInt.h. + * + *---------------------------------------------------------------------- + */ + +int +Tcl_LimitReady( + Tcl_Interp *interp) +{ + register Interp *iPtr = (Interp *) interp; + + if (iPtr->limit.active != 0) { + register int ticker = ++iPtr->limit.granularityTicker; + + if ((iPtr->limit.active & TCL_LIMIT_COMMANDS) && + ((iPtr->limit.cmdGranularity == 1) || + (ticker % iPtr->limit.cmdGranularity == 0))) { + return 1; + } + if ((iPtr->limit.active & TCL_LIMIT_TIME) && + ((iPtr->limit.timeGranularity == 1) || + (ticker % iPtr->limit.timeGranularity == 0))) { + return 1; + } + } + return 0; +} + +/* + *---------------------------------------------------------------------- + * + * Tcl_LimitCheck -- + * + * Check all currently set limits in the interpreter (where permitted by + * granularity). If a limit is exceeded, call its callbacks and, if the + * limit is still exceeded after the callbacks have run, make the + * interpreter generate an error that cannot be caught within the limited + * interpreter. + * + * Results: + * A Tcl result value (TCL_OK if no limit is exceeded, and TCL_ERROR if a + * limit has been exceeded). + * + * Side effects: + * May invoke system calls. May invoke other interpreters. May be + * reentrant. May put the interpreter into a state where it can no longer + * execute commands without outside intervention. + * + *---------------------------------------------------------------------- + */ + +int +Tcl_LimitCheck( + Tcl_Interp *interp) +{ + Interp *iPtr = (Interp *) interp; + register int ticker = iPtr->limit.granularityTicker; + + if (Tcl_InterpDeleted(interp)) { + return TCL_OK; + } + + if ((iPtr->limit.active & TCL_LIMIT_COMMANDS) && + ((iPtr->limit.cmdGranularity == 1) || + (ticker % iPtr->limit.cmdGranularity == 0)) && + (iPtr->limit.cmdCount < iPtr->cmdCount)) { + iPtr->limit.exceeded |= TCL_LIMIT_COMMANDS; + Tcl_Preserve(interp); + RunLimitHandlers(iPtr->limit.cmdHandlers, interp); + if (iPtr->limit.cmdCount >= iPtr->cmdCount) { + iPtr->limit.exceeded &= ~TCL_LIMIT_COMMANDS; + } else if (iPtr->limit.exceeded & TCL_LIMIT_COMMANDS) { + Tcl_SetObjResult(interp, Tcl_NewStringObj( + "command count limit exceeded", -1)); + Tcl_SetErrorCode(interp, "TCL", "LIMIT", "COMMANDS", NULL); + Tcl_Release(interp); + return TCL_ERROR; + } + Tcl_Release(interp); + } + + if ((iPtr->limit.active & TCL_LIMIT_TIME) && + ((iPtr->limit.timeGranularity == 1) || + (ticker % iPtr->limit.timeGranularity == 0))) { + Tcl_Time now; + + Tcl_GetTime(&now); + if (iPtr->limit.time.sec < now.sec || + (iPtr->limit.time.sec == now.sec && + iPtr->limit.time.usec < now.usec)) { + iPtr->limit.exceeded |= TCL_LIMIT_TIME; + Tcl_Preserve(interp); + RunLimitHandlers(iPtr->limit.timeHandlers, interp); + if (iPtr->limit.time.sec > now.sec || + (iPtr->limit.time.sec == now.sec && + iPtr->limit.time.usec >= now.usec)) { + iPtr->limit.exceeded &= ~TCL_LIMIT_TIME; + } else if (iPtr->limit.exceeded & TCL_LIMIT_TIME) { + Tcl_SetObjResult(interp, Tcl_NewStringObj( + "time limit exceeded", -1)); + Tcl_SetErrorCode(interp, "TCL", "LIMIT", "TIME", NULL); + Tcl_Release(interp); + return TCL_ERROR; + } + Tcl_Release(interp); + } + } + + return TCL_OK; +} + +/* + *---------------------------------------------------------------------- + * + * RunLimitHandlers -- + * + * Invoke all the limit handlers in a list (for a particular limit). + * Note that no particular limit handler callback will be invoked + * reentrantly. + * + * Results: + * None. + * + * Side effects: + * Depends on the limit handlers. + * + *---------------------------------------------------------------------- + */ + +static void +RunLimitHandlers( + LimitHandler *handlerPtr, + Tcl_Interp *interp) +{ + LimitHandler *nextPtr; + for (; handlerPtr!=NULL ; handlerPtr=nextPtr) { + if (handlerPtr->flags & (LIMIT_HANDLER_DELETED|LIMIT_HANDLER_ACTIVE)) { + /* + * Reentrant call or something seriously strange in the delete + * code. + */ + + nextPtr = handlerPtr->nextPtr; + continue; + } + + /* + * Set the ACTIVE flag while running the limit handler itself so we + * cannot reentrantly call this handler and know to use the alternate + * method of deletion if necessary. + */ + + handlerPtr->flags |= LIMIT_HANDLER_ACTIVE; + handlerPtr->handlerProc(handlerPtr->clientData, interp); + handlerPtr->flags &= ~LIMIT_HANDLER_ACTIVE; + + /* + * Rediscover this value; it might have changed during the processing + * of a limit handler. We have to record it here because we might + * delete the structure below, and reading a value out of a deleted + * structure is unsafe (even if actually legal with some + * malloc()/free() implementations.) + */ + + nextPtr = handlerPtr->nextPtr; + + /* + * If we deleted the current handler while we were executing it, we + * will have spliced it out of the list and set the + * LIMIT_HANDLER_DELETED flag. + */ + + if (handlerPtr->flags & LIMIT_HANDLER_DELETED) { + if (handlerPtr->deleteProc != NULL) { + handlerPtr->deleteProc(handlerPtr->clientData); + } + ckfree(handlerPtr); + } + } +} + +/* + *---------------------------------------------------------------------- + * + * Tcl_LimitAddHandler -- + * + * Add a callback handler for a particular resource limit. + * + * Results: + * None. + * + * Side effects: + * Extends the internal linked list of handlers for a limit. + * + *---------------------------------------------------------------------- + */ + +void +Tcl_LimitAddHandler( + Tcl_Interp *interp, + int type, + Tcl_LimitHandlerProc *handlerProc, + ClientData clientData, + Tcl_LimitHandlerDeleteProc *deleteProc) +{ + Interp *iPtr = (Interp *) interp; + LimitHandler *handlerPtr; + + /* + * Convert everything into a real deletion callback. + */ + + if (deleteProc == (Tcl_LimitHandlerDeleteProc *) TCL_DYNAMIC) { + deleteProc = (Tcl_LimitHandlerDeleteProc *) Tcl_Free; + } + if (deleteProc == (Tcl_LimitHandlerDeleteProc *) TCL_STATIC) { + deleteProc = NULL; + } + + /* + * Allocate a handler record. + */ + + handlerPtr = ckalloc(sizeof(LimitHandler)); + handlerPtr->flags = 0; + handlerPtr->handlerProc = handlerProc; + handlerPtr->clientData = clientData; + handlerPtr->deleteProc = deleteProc; + handlerPtr->prevPtr = NULL; + + /* + * Prepend onto the front of the correct linked list. + */ + + switch (type) { + case TCL_LIMIT_COMMANDS: + handlerPtr->nextPtr = iPtr->limit.cmdHandlers; + if (handlerPtr->nextPtr != NULL) { + handlerPtr->nextPtr->prevPtr = handlerPtr; + } + iPtr->limit.cmdHandlers = handlerPtr; + return; + + case TCL_LIMIT_TIME: + handlerPtr->nextPtr = iPtr->limit.timeHandlers; + if (handlerPtr->nextPtr != NULL) { + handlerPtr->nextPtr->prevPtr = handlerPtr; + } + iPtr->limit.timeHandlers = handlerPtr; + return; + } + + Tcl_Panic("unknown type of resource limit"); +} + +/* + *---------------------------------------------------------------------- + * + * Tcl_LimitRemoveHandler -- + * + * Remove a callback handler for a particular resource limit. + * + * Results: + * None. + * + * Side effects: + * The handler is spliced out of the internal linked list for the limit, + * and if not currently being invoked, deleted. Otherwise it is just + * marked for deletion and removed when the limit handler has finished + * executing. + * + *---------------------------------------------------------------------- + */ + +void +Tcl_LimitRemoveHandler( + Tcl_Interp *interp, + int type, + Tcl_LimitHandlerProc *handlerProc, + ClientData clientData) +{ + Interp *iPtr = (Interp *) interp; + LimitHandler *handlerPtr; + + switch (type) { + case TCL_LIMIT_COMMANDS: + handlerPtr = iPtr->limit.cmdHandlers; + break; + case TCL_LIMIT_TIME: + handlerPtr = iPtr->limit.timeHandlers; + break; + default: + Tcl_Panic("unknown type of resource limit"); + return; + } + + for (; handlerPtr!=NULL ; handlerPtr=handlerPtr->nextPtr) { + if ((handlerPtr->handlerProc != handlerProc) || + (handlerPtr->clientData != clientData)) { + continue; + } + + /* + * We've found the handler to delete; mark it as doomed if not already + * so marked (which shouldn't actually happen). + */ + + if (handlerPtr->flags & LIMIT_HANDLER_DELETED) { + return; + } + handlerPtr->flags |= LIMIT_HANDLER_DELETED; + + /* + * Splice the handler out of the doubly-linked list. + */ + + if (handlerPtr->prevPtr == NULL) { + switch (type) { + case TCL_LIMIT_COMMANDS: + iPtr->limit.cmdHandlers = handlerPtr->nextPtr; + break; + case TCL_LIMIT_TIME: + iPtr->limit.timeHandlers = handlerPtr->nextPtr; + break; + } + } else { + handlerPtr->prevPtr->nextPtr = handlerPtr->nextPtr; + } + if (handlerPtr->nextPtr != NULL) { + handlerPtr->nextPtr->prevPtr = handlerPtr->prevPtr; + } + + /* + * If nothing is currently executing the handler, delete its client + * data and the overall handler structure now. Otherwise it will all + * go away when the handler returns. + */ + + if (!(handlerPtr->flags & LIMIT_HANDLER_ACTIVE)) { + if (handlerPtr->deleteProc != NULL) { + handlerPtr->deleteProc(handlerPtr->clientData); + } + ckfree(handlerPtr); + } + return; + } +} + +/* + *---------------------------------------------------------------------- + * + * TclLimitRemoveAllHandlers -- + * + * Remove all limit callback handlers for an interpreter. This is invoked + * as part of deleting the interpreter. + * + * Results: + * None. + * + * Side effects: + * Limit handlers are deleted or marked for deletion (as with + * Tcl_LimitRemoveHandler). + * + *---------------------------------------------------------------------- + */ + +void +TclLimitRemoveAllHandlers( + Tcl_Interp *interp) +{ + Interp *iPtr = (Interp *) interp; + LimitHandler *handlerPtr, *nextHandlerPtr; + + /* + * Delete all command-limit handlers. + */ + + for (handlerPtr=iPtr->limit.cmdHandlers, iPtr->limit.cmdHandlers=NULL; + handlerPtr!=NULL; handlerPtr=nextHandlerPtr) { + nextHandlerPtr = handlerPtr->nextPtr; + + /* + * Do not delete here if it has already been marked for deletion. + */ + + if (handlerPtr->flags & LIMIT_HANDLER_DELETED) { + continue; + } + handlerPtr->flags |= LIMIT_HANDLER_DELETED; + handlerPtr->prevPtr = NULL; + handlerPtr->nextPtr = NULL; + + /* + * If nothing is currently executing the handler, delete its client + * data and the overall handler structure now. Otherwise it will all + * go away when the handler returns. + */ + + if (!(handlerPtr->flags & LIMIT_HANDLER_ACTIVE)) { + if (handlerPtr->deleteProc != NULL) { + handlerPtr->deleteProc(handlerPtr->clientData); + } + ckfree(handlerPtr); + } + } + + /* + * Delete all time-limit handlers. + */ + + for (handlerPtr=iPtr->limit.timeHandlers, iPtr->limit.timeHandlers=NULL; + handlerPtr!=NULL; handlerPtr=nextHandlerPtr) { + nextHandlerPtr = handlerPtr->nextPtr; + + /* + * Do not delete here if it has already been marked for deletion. + */ + + if (handlerPtr->flags & LIMIT_HANDLER_DELETED) { + continue; + } + handlerPtr->flags |= LIMIT_HANDLER_DELETED; + handlerPtr->prevPtr = NULL; + handlerPtr->nextPtr = NULL; + + /* + * If nothing is currently executing the handler, delete its client + * data and the overall handler structure now. Otherwise it will all + * go away when the handler returns. + */ + + if (!(handlerPtr->flags & LIMIT_HANDLER_ACTIVE)) { + if (handlerPtr->deleteProc != NULL) { + handlerPtr->deleteProc(handlerPtr->clientData); + } + ckfree(handlerPtr); + } + } + + /* + * Delete the timer callback that is used to trap limits that occur in + * [vwait]s... + */ + + if (iPtr->limit.timeEvent != NULL) { + Tcl_DeleteTimerHandler(iPtr->limit.timeEvent); + iPtr->limit.timeEvent = NULL; + } +} + +/* + *---------------------------------------------------------------------- + * + * Tcl_LimitTypeEnabled -- + * + * Check whether a particular limit has been enabled for an interpreter. + * + * Results: + * A boolean value. + * + * Side effects: + * None. + * + *---------------------------------------------------------------------- + */ + +int +Tcl_LimitTypeEnabled( + Tcl_Interp *interp, + int type) +{ + Interp *iPtr = (Interp *) interp; + + return (iPtr->limit.active & type) != 0; +} + +/* + *---------------------------------------------------------------------- + * + * Tcl_LimitTypeExceeded -- + * + * Check whether a particular limit has been exceeded for an interpreter. + * + * Results: + * A boolean value (note that Tcl_LimitExceeded will always return + * non-zero when this function returns non-zero). + * + * Side effects: + * None. + * + *---------------------------------------------------------------------- + */ + +int +Tcl_LimitTypeExceeded( + Tcl_Interp *interp, + int type) +{ + Interp *iPtr = (Interp *) interp; + + return (iPtr->limit.exceeded & type) != 0; +} + +/* + *---------------------------------------------------------------------- + * + * Tcl_LimitTypeSet -- + * + * Enable a particular limit for an interpreter. + * + * Results: + * None. + * + * Side effects: + * The limit is turned on and will be checked in future at an interval + * determined by the frequency of calling of Tcl_LimitReady and the + * granularity of the limit in question. + * + *---------------------------------------------------------------------- + */ + +void +Tcl_LimitTypeSet( + Tcl_Interp *interp, + int type) +{ + Interp *iPtr = (Interp *) interp; + + iPtr->limit.active |= type; +} + +/* + *---------------------------------------------------------------------- + * + * Tcl_LimitTypeReset -- + * + * Disable a particular limit for an interpreter. + * + * Results: + * None. + * + * Side effects: + * The limit is disabled. If the limit was exceeded when this function + * was called, the limit will no longer be exceeded afterwards and the + * interpreter will be free to execute further scripts (assuming it isn't + * also deleted, of course). + * + *---------------------------------------------------------------------- + */ + +void +Tcl_LimitTypeReset( + Tcl_Interp *interp, + int type) +{ + Interp *iPtr = (Interp *) interp; + + iPtr->limit.active &= ~type; + iPtr->limit.exceeded &= ~type; +} + +/* + *---------------------------------------------------------------------- + * + * Tcl_LimitSetCommands -- + * + * Set the command limit for an interpreter. + * + * Results: + * None. + * + * Side effects: + * Also resets whether the command limit was exceeded. This might permit + * a small amount of further execution in the interpreter even if the + * limit itself is theoretically exceeded. + * + *---------------------------------------------------------------------- + */ + +void +Tcl_LimitSetCommands( + Tcl_Interp *interp, + int commandLimit) +{ + Interp *iPtr = (Interp *) interp; + + iPtr->limit.cmdCount = commandLimit; + iPtr->limit.exceeded &= ~TCL_LIMIT_COMMANDS; +} + +/* + *---------------------------------------------------------------------- + * + * Tcl_LimitGetCommands -- + * + * Get the number of commands that may be executed in the interpreter + * before the command-limit is reached. + * + * Results: + * An upper bound on the number of commands. + * + * Side effects: + * None. + * + *---------------------------------------------------------------------- + */ + +int +Tcl_LimitGetCommands( + Tcl_Interp *interp) +{ + Interp *iPtr = (Interp *) interp; + + return iPtr->limit.cmdCount; +} + +/* + *---------------------------------------------------------------------- + * + * Tcl_LimitSetTime -- + * + * Set the time limit for an interpreter by copying it from the value + * pointed to by the timeLimitPtr argument. + * + * Results: + * None. + * + * Side effects: + * Also resets whether the time limit was exceeded. This might permit a + * small amount of further execution in the interpreter even if the limit + * itself is theoretically exceeded. + * + *---------------------------------------------------------------------- + */ + +void +Tcl_LimitSetTime( + Tcl_Interp *interp, + Tcl_Time *timeLimitPtr) +{ + Interp *iPtr = (Interp *) interp; + Tcl_Time nextMoment; + + memcpy(&iPtr->limit.time, timeLimitPtr, sizeof(Tcl_Time)); + if (iPtr->limit.timeEvent != NULL) { + Tcl_DeleteTimerHandler(iPtr->limit.timeEvent); + } + nextMoment.sec = timeLimitPtr->sec; + nextMoment.usec = timeLimitPtr->usec+10; + if (nextMoment.usec >= 1000000) { + nextMoment.sec++; + nextMoment.usec -= 1000000; + } + iPtr->limit.timeEvent = TclCreateAbsoluteTimerHandler(&nextMoment, + TimeLimitCallback, interp); + iPtr->limit.exceeded &= ~TCL_LIMIT_TIME; +} + +/* + *---------------------------------------------------------------------- + * + * TimeLimitCallback -- + * + * Callback that allows time limits to be enforced even when doing a + * blocking wait for events. + * + * Results: + * None. + * + * Side effects: + * May put the interpreter into a state where it can no longer execute + * commands. May make callbacks into other interpreters. + * + *---------------------------------------------------------------------- + */ + +static void +TimeLimitCallback( + ClientData clientData) +{ + Tcl_Interp *interp = clientData; + Interp *iPtr = clientData; + int code; + + Tcl_Preserve(interp); + iPtr->limit.timeEvent = NULL; + + /* + * Must reset the granularity ticker here to force an immediate full + * check. This is OK because we're swallowing the cost in the overall cost + * of the event loop. [Bug 2891362] + */ + + iPtr->limit.granularityTicker = 0; + + code = Tcl_LimitCheck(interp); + if (code != TCL_OK) { + Tcl_AddErrorInfo(interp, "\n (while waiting for event)"); + Tcl_BackgroundException(interp, code); + } + Tcl_Release(interp); +} + +/* + *---------------------------------------------------------------------- + * + * Tcl_LimitGetTime -- + * + * Get the current time limit. + * + * Results: + * The time limit (by it being copied into the variable pointed to by the + * timeLimitPtr). + * + * Side effects: + * None. + * + *---------------------------------------------------------------------- + */ + +void +Tcl_LimitGetTime( + Tcl_Interp *interp, + Tcl_Time *timeLimitPtr) +{ + Interp *iPtr = (Interp *) interp; + + memcpy(timeLimitPtr, &iPtr->limit.time, sizeof(Tcl_Time)); +} + +/* + *---------------------------------------------------------------------- + * + * Tcl_LimitSetGranularity -- + * + * Set the granularity divisor (which must be positive) for a particular + * limit. + * + * Results: + * None. + * + * Side effects: + * The granularity is updated. + * + *---------------------------------------------------------------------- + */ + +void +Tcl_LimitSetGranularity( + Tcl_Interp *interp, + int type, + int granularity) +{ + Interp *iPtr = (Interp *) interp; + if (granularity < 1) { + Tcl_Panic("limit granularity must be positive"); + } + + switch (type) { + case TCL_LIMIT_COMMANDS: + iPtr->limit.cmdGranularity = granularity; + return; + case TCL_LIMIT_TIME: + iPtr->limit.timeGranularity = granularity; + return; + } + Tcl_Panic("unknown type of resource limit"); +} + +/* + *---------------------------------------------------------------------- + * + * Tcl_LimitGetGranularity -- + * + * Get the granularity divisor for a particular limit. + * + * Results: + * The granularity divisor for the given limit. + * + * Side effects: + * None. + * + *---------------------------------------------------------------------- + */ + +int +Tcl_LimitGetGranularity( + Tcl_Interp *interp, + int type) +{ + Interp *iPtr = (Interp *) interp; + + switch (type) { + case TCL_LIMIT_COMMANDS: + return iPtr->limit.cmdGranularity; + case TCL_LIMIT_TIME: + return iPtr->limit.timeGranularity; + } + Tcl_Panic("unknown type of resource limit"); + return -1; /* NOT REACHED */ +} + +/* + *---------------------------------------------------------------------- + * + * DeleteScriptLimitCallback -- + * + * Callback for when a script limit (a limit callback implemented as a + * Tcl script in a master interpreter, as set up from Tcl) is deleted. + * + * Results: + * None. + * + * Side effects: + * The reference to the script callback from the controlling interpreter + * is removed. + * + *---------------------------------------------------------------------- + */ + +static void +DeleteScriptLimitCallback( + ClientData clientData) +{ + ScriptLimitCallback *limitCBPtr = clientData; + + Tcl_DecrRefCount(limitCBPtr->scriptObj); + if (limitCBPtr->entryPtr != NULL) { + Tcl_DeleteHashEntry(limitCBPtr->entryPtr); + } + ckfree(limitCBPtr); +} + +/* + *---------------------------------------------------------------------- + * + * CallScriptLimitCallback -- + * + * Invoke a script limit callback. Used to implement limit callbacks set + * at the Tcl level on child interpreters. + * + * Results: + * None. + * + * Side effects: + * Depends on the callback script. Errors are reported as background + * errors. + * + *---------------------------------------------------------------------- + */ + +static void +CallScriptLimitCallback( + ClientData clientData, + Tcl_Interp *interp) /* Interpreter which failed the limit */ +{ + ScriptLimitCallback *limitCBPtr = clientData; + int code; + + if (Tcl_InterpDeleted(limitCBPtr->interp)) { + return; + } + Tcl_Preserve(limitCBPtr->interp); + code = Tcl_EvalObjEx(limitCBPtr->interp, limitCBPtr->scriptObj, + TCL_EVAL_GLOBAL); + if (code != TCL_OK && !Tcl_InterpDeleted(limitCBPtr->interp)) { + Tcl_BackgroundException(limitCBPtr->interp, code); + } + Tcl_Release(limitCBPtr->interp); +} + +/* + *---------------------------------------------------------------------- + * + * SetScriptLimitCallback -- + * + * Install (or remove, if scriptObj is NULL) a limit callback script that + * is called when the target interpreter exceeds the type of limit + * specified. Each interpreter may only have one callback set on another + * interpreter through this mechanism (though as many interpreters may be + * limited as the programmer chooses overall). + * + * Results: + * None. + * + * Side effects: + * A limit callback implemented as an invokation of a Tcl script in + * another interpreter is either installed or removed. + * + *---------------------------------------------------------------------- + */ + +static void +SetScriptLimitCallback( + Tcl_Interp *interp, + int type, + Tcl_Interp *targetInterp, + Tcl_Obj *scriptObj) +{ + ScriptLimitCallback *limitCBPtr; + Tcl_HashEntry *hashPtr; + int isNew; + ScriptLimitCallbackKey key; + Interp *iPtr = (Interp *) interp; + + if (interp == targetInterp) { + Tcl_Panic("installing limit callback to the limited interpreter"); + } + + key.interp = targetInterp; + key.type = type; + + if (scriptObj == NULL) { + hashPtr = Tcl_FindHashEntry(&iPtr->limit.callbacks, (char *) &key); + if (hashPtr != NULL) { + Tcl_LimitRemoveHandler(targetInterp, type, CallScriptLimitCallback, + Tcl_GetHashValue(hashPtr)); + } + return; + } + + hashPtr = Tcl_CreateHashEntry(&iPtr->limit.callbacks, &key, + &isNew); + if (!isNew) { + limitCBPtr = Tcl_GetHashValue(hashPtr); + limitCBPtr->entryPtr = NULL; + Tcl_LimitRemoveHandler(targetInterp, type, CallScriptLimitCallback, + limitCBPtr); + } + + limitCBPtr = ckalloc(sizeof(ScriptLimitCallback)); + limitCBPtr->interp = interp; + limitCBPtr->scriptObj = scriptObj; + limitCBPtr->entryPtr = hashPtr; + limitCBPtr->type = type; + Tcl_IncrRefCount(scriptObj); + + Tcl_LimitAddHandler(targetInterp, type, CallScriptLimitCallback, + limitCBPtr, DeleteScriptLimitCallback); + Tcl_SetHashValue(hashPtr, limitCBPtr); +} + +/* + *---------------------------------------------------------------------- + * + * TclRemoveScriptLimitCallbacks -- + * + * Remove all script-implemented limit callbacks that make calls back + * into the given interpreter. This invoked as part of deleting an + * interpreter. + * + * Results: + * None. + * + * Side effects: + * The script limit callbacks are removed or marked for later removal. + * + *---------------------------------------------------------------------- + */ + +void +TclRemoveScriptLimitCallbacks( + Tcl_Interp *interp) +{ + Interp *iPtr = (Interp *) interp; + Tcl_HashEntry *hashPtr; + Tcl_HashSearch search; + ScriptLimitCallbackKey *keyPtr; + + hashPtr = Tcl_FirstHashEntry(&iPtr->limit.callbacks, &search); + while (hashPtr != NULL) { + keyPtr = (ScriptLimitCallbackKey *) + Tcl_GetHashKey(&iPtr->limit.callbacks, hashPtr); + Tcl_LimitRemoveHandler(keyPtr->interp, keyPtr->type, + CallScriptLimitCallback, Tcl_GetHashValue(hashPtr)); + hashPtr = Tcl_NextHashEntry(&search); + } + Tcl_DeleteHashTable(&iPtr->limit.callbacks); +} + +/* + *---------------------------------------------------------------------- + * + * TclInitLimitSupport -- + * + * Initialise all the parts of the interpreter relating to resource limit + * management. This allows an interpreter to both have limits set upon + * itself and set limits upon other interpreters. + * + * Results: + * None. + * + * Side effects: + * The resource limit subsystem is initialised for the interpreter. + * + *---------------------------------------------------------------------- + */ + +void +TclInitLimitSupport( + Tcl_Interp *interp) +{ + Interp *iPtr = (Interp *) interp; + + iPtr->limit.active = 0; + iPtr->limit.granularityTicker = 0; + iPtr->limit.exceeded = 0; + iPtr->limit.cmdCount = 0; + iPtr->limit.cmdHandlers = NULL; + iPtr->limit.cmdGranularity = 1; + memset(&iPtr->limit.time, 0, sizeof(Tcl_Time)); + iPtr->limit.timeHandlers = NULL; + iPtr->limit.timeEvent = NULL; + iPtr->limit.timeGranularity = 10; + Tcl_InitHashTable(&iPtr->limit.callbacks, + sizeof(ScriptLimitCallbackKey)/sizeof(int)); +} + +/* + *---------------------------------------------------------------------- + * + * InheritLimitsFromMaster -- + * + * Derive the interpreter limit configuration for a slave interpreter + * from the limit config for the master. + * + * Results: + * None. + * + * Side effects: + * The slave interpreter limits are set so that if the master has a + * limit, it may not exceed it by handing off work to slave interpreters. + * Note that this does not transfer limit callbacks from the master to + * the slave. + * + *---------------------------------------------------------------------- + */ + +static void +InheritLimitsFromMaster( + Tcl_Interp *slaveInterp, + Tcl_Interp *masterInterp) +{ + Interp *slavePtr = (Interp *) slaveInterp; + Interp *masterPtr = (Interp *) masterInterp; + + if (masterPtr->limit.active & TCL_LIMIT_COMMANDS) { + slavePtr->limit.active |= TCL_LIMIT_COMMANDS; + slavePtr->limit.cmdCount = 0; + slavePtr->limit.cmdGranularity = masterPtr->limit.cmdGranularity; + } + if (masterPtr->limit.active & TCL_LIMIT_TIME) { + slavePtr->limit.active |= TCL_LIMIT_TIME; + memcpy(&slavePtr->limit.time, &masterPtr->limit.time, + sizeof(Tcl_Time)); + slavePtr->limit.timeGranularity = masterPtr->limit.timeGranularity; + } +} + +/* + *---------------------------------------------------------------------- + * + * SlaveCommandLimitCmd -- + * + * Implementation of the [interp limit $i commands] and [$i limit + * commands] subcommands. See the interp manual page for a full + * description. + * + * Results: + * A standard Tcl result. + * + * Side effects: + * Depends on the arguments. + * + *---------------------------------------------------------------------- + */ + +static int +SlaveCommandLimitCmd( + Tcl_Interp *interp, /* Current interpreter. */ + Tcl_Interp *slaveInterp, /* Interpreter being adjusted. */ + int consumedObjc, /* Number of args already parsed. */ + int objc, /* Total number of arguments. */ + Tcl_Obj *const objv[]) /* Argument objects. */ +{ + static const char *const options[] = { + "-command", "-granularity", "-value", NULL + }; + enum Options { + OPT_CMD, OPT_GRAN, OPT_VAL + }; + Interp *iPtr = (Interp *) interp; + int index; + ScriptLimitCallbackKey key; + ScriptLimitCallback *limitCBPtr; + Tcl_HashEntry *hPtr; + + /* + * First, ensure that we are not reading or writing the calling + * interpreter's limits; it may only manipulate its children. Note that + * the low level API enforces this with Tcl_Panic, which we want to + * avoid. [Bug 3398794] + */ + + if (interp == slaveInterp) { + Tcl_SetObjResult(interp, Tcl_NewStringObj( + "limits on current interpreter inaccessible", -1)); + Tcl_SetErrorCode(interp, "TCL", "OPERATION", "INTERP", "SELF", NULL); + return TCL_ERROR; + } + + if (objc == consumedObjc) { + Tcl_Obj *dictPtr; + + TclNewObj(dictPtr); + key.interp = slaveInterp; + key.type = TCL_LIMIT_COMMANDS; + hPtr = Tcl_FindHashEntry(&iPtr->limit.callbacks, (char *) &key); + if (hPtr != NULL) { + limitCBPtr = Tcl_GetHashValue(hPtr); + if (limitCBPtr != NULL && limitCBPtr->scriptObj != NULL) { + Tcl_DictObjPut(NULL, dictPtr, Tcl_NewStringObj(options[0], -1), + limitCBPtr->scriptObj); + } else { + goto putEmptyCommandInDict; + } + } else { + Tcl_Obj *empty; + + putEmptyCommandInDict: + TclNewObj(empty); + Tcl_DictObjPut(NULL, dictPtr, + Tcl_NewStringObj(options[0], -1), empty); + } + Tcl_DictObjPut(NULL, dictPtr, Tcl_NewStringObj(options[1], -1), + Tcl_NewIntObj(Tcl_LimitGetGranularity(slaveInterp, + TCL_LIMIT_COMMANDS))); + + if (Tcl_LimitTypeEnabled(slaveInterp, TCL_LIMIT_COMMANDS)) { + Tcl_DictObjPut(NULL, dictPtr, Tcl_NewStringObj(options[2], -1), + Tcl_NewIntObj(Tcl_LimitGetCommands(slaveInterp))); + } else { + Tcl_Obj *empty; + + TclNewObj(empty); + Tcl_DictObjPut(NULL, dictPtr, + Tcl_NewStringObj(options[2], -1), empty); + } + Tcl_SetObjResult(interp, dictPtr); + return TCL_OK; + } else if (objc == consumedObjc+1) { + if (Tcl_GetIndexFromObj(interp, objv[consumedObjc], options, "option", + 0, &index) != TCL_OK) { + return TCL_ERROR; + } + switch ((enum Options) index) { + case OPT_CMD: + key.interp = slaveInterp; + key.type = TCL_LIMIT_COMMANDS; + hPtr = Tcl_FindHashEntry(&iPtr->limit.callbacks, (char *) &key); + if (hPtr != NULL) { + limitCBPtr = Tcl_GetHashValue(hPtr); + if (limitCBPtr != NULL && limitCBPtr->scriptObj != NULL) { + Tcl_SetObjResult(interp, limitCBPtr->scriptObj); + } + } + break; + case OPT_GRAN: + Tcl_SetObjResult(interp, Tcl_NewIntObj( + Tcl_LimitGetGranularity(slaveInterp, TCL_LIMIT_COMMANDS))); + break; + case OPT_VAL: + if (Tcl_LimitTypeEnabled(slaveInterp, TCL_LIMIT_COMMANDS)) { + Tcl_SetObjResult(interp, + Tcl_NewIntObj(Tcl_LimitGetCommands(slaveInterp))); + } + break; + } + return TCL_OK; + } else if ((objc-consumedObjc) & 1 /* isOdd(objc-consumedObjc) */) { + Tcl_WrongNumArgs(interp, consumedObjc, objv, "?-option value ...?"); + return TCL_ERROR; + } else { + int i, scriptLen = 0, limitLen = 0; + Tcl_Obj *scriptObj = NULL, *granObj = NULL, *limitObj = NULL; + int gran = 0, limit = 0; + + for (i=consumedObjc ; i<objc ; i+=2) { + if (Tcl_GetIndexFromObj(interp, objv[i], options, "option", 0, + &index) != TCL_OK) { + return TCL_ERROR; + } + switch ((enum Options) index) { + case OPT_CMD: + scriptObj = objv[i+1]; + (void) Tcl_GetStringFromObj(objv[i+1], &scriptLen); + break; + case OPT_GRAN: + granObj = objv[i+1]; + if (TclGetIntFromObj(interp, objv[i+1], &gran) != TCL_OK) { + return TCL_ERROR; + } + if (gran < 1) { + Tcl_SetObjResult(interp, Tcl_NewStringObj( + "granularity must be at least 1", -1)); + Tcl_SetErrorCode(interp, "TCL", "OPERATION", "INTERP", + "BADVALUE", NULL); + return TCL_ERROR; + } + break; + case OPT_VAL: + limitObj = objv[i+1]; + (void) Tcl_GetStringFromObj(objv[i+1], &limitLen); + if (limitLen == 0) { + break; + } + if (TclGetIntFromObj(interp, objv[i+1], &limit) != TCL_OK) { + return TCL_ERROR; + } + if (limit < 0) { + Tcl_SetObjResult(interp, Tcl_NewStringObj( + "command limit value must be at least 0", -1)); + Tcl_SetErrorCode(interp, "TCL", "OPERATION", "INTERP", + "BADVALUE", NULL); + return TCL_ERROR; + } + break; + } + } + if (scriptObj != NULL) { + SetScriptLimitCallback(interp, TCL_LIMIT_COMMANDS, slaveInterp, + (scriptLen > 0 ? scriptObj : NULL)); + } + if (granObj != NULL) { + Tcl_LimitSetGranularity(slaveInterp, TCL_LIMIT_COMMANDS, gran); + } + if (limitObj != NULL) { + if (limitLen > 0) { + Tcl_LimitSetCommands(slaveInterp, limit); + Tcl_LimitTypeSet(slaveInterp, TCL_LIMIT_COMMANDS); + } else { + Tcl_LimitTypeReset(slaveInterp, TCL_LIMIT_COMMANDS); + } + } + return TCL_OK; + } +} + +/* + *---------------------------------------------------------------------- + * + * SlaveTimeLimitCmd -- + * + * Implementation of the [interp limit $i time] and [$i limit time] + * subcommands. See the interp manual page for a full description. + * + * Results: + * A standard Tcl result. + * + * Side effects: + * Depends on the arguments. + * + *---------------------------------------------------------------------- + */ + +static int +SlaveTimeLimitCmd( + Tcl_Interp *interp, /* Current interpreter. */ + Tcl_Interp *slaveInterp, /* Interpreter being adjusted. */ + int consumedObjc, /* Number of args already parsed. */ + int objc, /* Total number of arguments. */ + Tcl_Obj *const objv[]) /* Argument objects. */ +{ + static const char *const options[] = { + "-command", "-granularity", "-milliseconds", "-seconds", NULL + }; + enum Options { + OPT_CMD, OPT_GRAN, OPT_MILLI, OPT_SEC + }; + Interp *iPtr = (Interp *) interp; + int index; + ScriptLimitCallbackKey key; + ScriptLimitCallback *limitCBPtr; + Tcl_HashEntry *hPtr; + + /* + * First, ensure that we are not reading or writing the calling + * interpreter's limits; it may only manipulate its children. Note that + * the low level API enforces this with Tcl_Panic, which we want to + * avoid. [Bug 3398794] + */ + + if (interp == slaveInterp) { + Tcl_SetObjResult(interp, Tcl_NewStringObj( + "limits on current interpreter inaccessible", -1)); + Tcl_SetErrorCode(interp, "TCL", "OPERATION", "INTERP", "SELF", NULL); + return TCL_ERROR; + } + + if (objc == consumedObjc) { + Tcl_Obj *dictPtr; + + TclNewObj(dictPtr); + key.interp = slaveInterp; + key.type = TCL_LIMIT_TIME; + hPtr = Tcl_FindHashEntry(&iPtr->limit.callbacks, (char *) &key); + if (hPtr != NULL) { + limitCBPtr = Tcl_GetHashValue(hPtr); + if (limitCBPtr != NULL && limitCBPtr->scriptObj != NULL) { + Tcl_DictObjPut(NULL, dictPtr, Tcl_NewStringObj(options[0], -1), + limitCBPtr->scriptObj); + } else { + goto putEmptyCommandInDict; + } + } else { + Tcl_Obj *empty; + putEmptyCommandInDict: + TclNewObj(empty); + Tcl_DictObjPut(NULL, dictPtr, + Tcl_NewStringObj(options[0], -1), empty); + } + Tcl_DictObjPut(NULL, dictPtr, Tcl_NewStringObj(options[1], -1), + Tcl_NewIntObj(Tcl_LimitGetGranularity(slaveInterp, + TCL_LIMIT_TIME))); + + if (Tcl_LimitTypeEnabled(slaveInterp, TCL_LIMIT_TIME)) { + Tcl_Time limitMoment; + + Tcl_LimitGetTime(slaveInterp, &limitMoment); + Tcl_DictObjPut(NULL, dictPtr, Tcl_NewStringObj(options[2], -1), + Tcl_NewLongObj(limitMoment.usec/1000)); + Tcl_DictObjPut(NULL, dictPtr, Tcl_NewStringObj(options[3], -1), + Tcl_NewLongObj(limitMoment.sec)); + } else { + Tcl_Obj *empty; + + TclNewObj(empty); + Tcl_DictObjPut(NULL, dictPtr, + Tcl_NewStringObj(options[2], -1), empty); + Tcl_DictObjPut(NULL, dictPtr, + Tcl_NewStringObj(options[3], -1), empty); + } + Tcl_SetObjResult(interp, dictPtr); + return TCL_OK; + } else if (objc == consumedObjc+1) { + if (Tcl_GetIndexFromObj(interp, objv[consumedObjc], options, "option", + 0, &index) != TCL_OK) { + return TCL_ERROR; + } + switch ((enum Options) index) { + case OPT_CMD: + key.interp = slaveInterp; + key.type = TCL_LIMIT_TIME; + hPtr = Tcl_FindHashEntry(&iPtr->limit.callbacks, (char *) &key); + if (hPtr != NULL) { + limitCBPtr = Tcl_GetHashValue(hPtr); + if (limitCBPtr != NULL && limitCBPtr->scriptObj != NULL) { + Tcl_SetObjResult(interp, limitCBPtr->scriptObj); + } + } + break; + case OPT_GRAN: + Tcl_SetObjResult(interp, Tcl_NewIntObj( + Tcl_LimitGetGranularity(slaveInterp, TCL_LIMIT_TIME))); + break; + case OPT_MILLI: + if (Tcl_LimitTypeEnabled(slaveInterp, TCL_LIMIT_TIME)) { + Tcl_Time limitMoment; + + Tcl_LimitGetTime(slaveInterp, &limitMoment); + Tcl_SetObjResult(interp, + Tcl_NewLongObj(limitMoment.usec/1000)); + } + break; + case OPT_SEC: + if (Tcl_LimitTypeEnabled(slaveInterp, TCL_LIMIT_TIME)) { + Tcl_Time limitMoment; + + Tcl_LimitGetTime(slaveInterp, &limitMoment); + Tcl_SetObjResult(interp, Tcl_NewLongObj(limitMoment.sec)); + } + break; + } + return TCL_OK; + } else if ((objc-consumedObjc) & 1 /* isOdd(objc-consumedObjc) */) { + Tcl_WrongNumArgs(interp, consumedObjc, objv, "?-option value ...?"); + return TCL_ERROR; + } else { + int i, scriptLen = 0, milliLen = 0, secLen = 0; + Tcl_Obj *scriptObj = NULL, *granObj = NULL; + Tcl_Obj *milliObj = NULL, *secObj = NULL; + int gran = 0; + Tcl_Time limitMoment; + int tmp; + + Tcl_LimitGetTime(slaveInterp, &limitMoment); + for (i=consumedObjc ; i<objc ; i+=2) { + if (Tcl_GetIndexFromObj(interp, objv[i], options, "option", 0, + &index) != TCL_OK) { + return TCL_ERROR; + } + switch ((enum Options) index) { + case OPT_CMD: + scriptObj = objv[i+1]; + (void) Tcl_GetStringFromObj(objv[i+1], &scriptLen); + break; + case OPT_GRAN: + granObj = objv[i+1]; + if (TclGetIntFromObj(interp, objv[i+1], &gran) != TCL_OK) { + return TCL_ERROR; + } + if (gran < 1) { + Tcl_SetObjResult(interp, Tcl_NewStringObj( + "granularity must be at least 1", -1)); + Tcl_SetErrorCode(interp, "TCL", "OPERATION", "INTERP", + "BADVALUE", NULL); + return TCL_ERROR; + } + break; + case OPT_MILLI: + milliObj = objv[i+1]; + (void) Tcl_GetStringFromObj(objv[i+1], &milliLen); + if (milliLen == 0) { + break; + } + if (TclGetIntFromObj(interp, objv[i+1], &tmp) != TCL_OK) { + return TCL_ERROR; + } + if (tmp < 0) { + Tcl_SetObjResult(interp, Tcl_NewStringObj( + "milliseconds must be at least 0", -1)); + Tcl_SetErrorCode(interp, "TCL", "OPERATION", "INTERP", + "BADVALUE", NULL); + return TCL_ERROR; + } + limitMoment.usec = ((long) tmp)*1000; + break; + case OPT_SEC: + secObj = objv[i+1]; + (void) Tcl_GetStringFromObj(objv[i+1], &secLen); + if (secLen == 0) { + break; + } + if (TclGetIntFromObj(interp, objv[i+1], &tmp) != TCL_OK) { + return TCL_ERROR; + } + if (tmp < 0) { + Tcl_SetObjResult(interp, Tcl_NewStringObj( + "seconds must be at least 0", -1)); + Tcl_SetErrorCode(interp, "TCL", "OPERATION", "INTERP", + "BADVALUE", NULL); + return TCL_ERROR; + } + limitMoment.sec = tmp; + break; + } + } + if (milliObj != NULL || secObj != NULL) { + if (milliObj != NULL) { + /* + * Setting -milliseconds but clearing -seconds, or resetting + * -milliseconds but not resetting -seconds? Bad voodoo! + */ + + if (secObj != NULL && secLen == 0 && milliLen > 0) { + Tcl_SetObjResult(interp, Tcl_NewStringObj( + "may only set -milliseconds if -seconds is not " + "also being reset", -1)); + Tcl_SetErrorCode(interp, "TCL", "OPERATION", "INTERP", + "BADUSAGE", NULL); + return TCL_ERROR; + } + if (milliLen == 0 && (secObj == NULL || secLen > 0)) { + Tcl_SetObjResult(interp, Tcl_NewStringObj( + "may only reset -milliseconds if -seconds is " + "also being reset", -1)); + Tcl_SetErrorCode(interp, "TCL", "OPERATION", "INTERP", + "BADUSAGE", NULL); + return TCL_ERROR; + } + } + + if (milliLen > 0 || secLen > 0) { + /* + * Force usec to be in range [0..1000000), possibly + * incrementing sec in the process. This makes it much easier + * for people to write scripts that do small time increments. + */ + + limitMoment.sec += limitMoment.usec / 1000000; + limitMoment.usec %= 1000000; + + Tcl_LimitSetTime(slaveInterp, &limitMoment); + Tcl_LimitTypeSet(slaveInterp, TCL_LIMIT_TIME); + } else { + Tcl_LimitTypeReset(slaveInterp, TCL_LIMIT_TIME); + } + } + if (scriptObj != NULL) { + SetScriptLimitCallback(interp, TCL_LIMIT_TIME, slaveInterp, + (scriptLen > 0 ? scriptObj : NULL)); + } + if (granObj != NULL) { + Tcl_LimitSetGranularity(slaveInterp, TCL_LIMIT_TIME, gran); + } + return TCL_OK; + } +} + +/* + * Local Variables: + * mode: c + * c-basic-offset: 4 + * fill-column: 78 + * End: + */ |