Tcl Source Code

     * declares that a delete is in progress and that recursive deletes should
     * be ignored.
     */

    cmdPtr->flags |= CMD_DYING;

    /*
     * Call each functions and then delete the trace.

     */

    cmdPtr->nsPtr->refCount++;

    if (cmdPtr->tracePtr != NULL) {
	CommandTrace *tracePtr;
	/* CallCommandTraces() does not cmdPtr, that's
	 * done just before Tcl_DeleteCommandFromToken() returns  */
	CallCommandTraces(iPtr,cmdPtr,NULL,NULL,TCL_TRACE_DELETE);

	/*
	 * Now delete these traces.
	 */

	    *foundNsPtr, *altFoundNsPtr, *actualCxtPtr;
    Tcl_Command token;
    Tcl_DictSearch search;
    Tcl_Obj *listObj;
    const char *simpleName;
    int index, done;

    if (nsPtr == NULL || nsPtr->flags & NS_DEAD) {
	if (!Tcl_InterpDeleted(interp)) {
	    Tcl_SetObjResult(interp, Tcl_NewStringObj(
		    "tried to manipulate ensemble of deleted namespace",
		    -1));
	    Tcl_SetErrorCode(interp, "TCL", "ENSEMBLE", "DEAD", NULL);
	}
	return TCL_ERROR;

	TclDStringAppendLiteral(&buf, "subcommand ?arg ...?");
	Tcl_WrongNumArgs(interp, 1, objv, Tcl_DStringValue(&buf));
	Tcl_DStringFree(&buf);

	return TCL_ERROR;
    }

    if (ensemblePtr->nsPtr->flags & NS_DEAD) {
	/*
	 * Don't know how we got here, but make things give up quickly.
	 */

	if (!Tcl_InterpDeleted(interp)) {
	    Tcl_SetObjResult(interp, Tcl_NewStringObj(
		    "ensemble activated for deleted namespace", -1));

	Namespace *pathNsPtr, *realNsPtr, *dummyNsPtr;

	(void) TclGetNamespaceForQualName(interp, name, cxtNsPtr,
		TCL_NAMESPACE_ONLY, &realNsPtr, &dummyNsPtr, &dummyNsPtr,
		&simpleName);
	if ((realNsPtr != NULL) && (simpleName != NULL)) {
	    if ((cxtNsPtr == realNsPtr)
		    || !(realNsPtr->flags & NS_DEAD)) {
		entryPtr = Tcl_FindHashEntry(&realNsPtr->cmdTable, simpleName);
		if (entryPtr != NULL) {
		    cmdPtr = (Command *)Tcl_GetHashValue(entryPtr);
		}
	    }
	}

	/*
	 * Next, check along the path.
	 */

	for (i=0 ; (cmdPtr == NULL) && i<cxtNsPtr->commandPathLength ; i++) {
	    pathNsPtr = cxtNsPtr->commandPathArray[i].nsPtr;
	    if (pathNsPtr == NULL) {
		continue;
	    }
	    (void) TclGetNamespaceForQualName(interp, name, pathNsPtr,
		    TCL_NAMESPACE_ONLY, &realNsPtr, &dummyNsPtr, &dummyNsPtr,
		    &simpleName);
	    if ((realNsPtr != NULL) && (simpleName != NULL)
		    && !(realNsPtr->flags & NS_DEAD)) {
		entryPtr = Tcl_FindHashEntry(&realNsPtr->cmdTable, simpleName);
		if (entryPtr != NULL) {
		    cmdPtr = (Command *)Tcl_GetHashValue(entryPtr);
		}
	    }
	}

	/*
	 * If we've still not found the command, look in the global namespace
	 * as a last resort.
	 */

	if (cmdPtr == NULL) {
	    (void) TclGetNamespaceForQualName(interp, name, NULL,
		    TCL_GLOBAL_ONLY, &realNsPtr, &dummyNsPtr, &dummyNsPtr,
		    &simpleName);
	    if ((realNsPtr != NULL) && (simpleName != NULL)
		    && !(realNsPtr->flags & NS_DEAD)) {
		entryPtr = Tcl_FindHashEntry(&realNsPtr->cmdTable, simpleName);
		if (entryPtr != NULL) {
		    cmdPtr = (Command *)Tcl_GetHashValue(entryPtr);
		}
	    }
	}
    } else {

        proc x {} {}
	trace add command x delete "namespace delete [namespace current];#"
    }
    namespace delete test_ns_2
} {}
test namespace-7.7 {Bug 1655305} -setup {
    interp create child
    # Can't invoke through the ensemble, since deleting ::tcl
    # (indirectly, via deleting the global namespace) deletes the ensemble.
    child eval {rename ::tcl::info::commands ::infocommands}
    child hide infocommands
    child eval {
	proc foo {} {
	    namespace delete ::
	}
    }

	namespace ensemble create
    }

    trace add command ns1 delete {
	namespace delete ns1
    }
} -body {
    # No segmentation fault given --enable-symbols.
    namespace delete ns1
} -result {}

test namespace-8.1 {TclTeardownNamespace, delete global namespace} {
    catch {interp delete test_interp}
    interp create test_interp
    interp eval test_interp {

    }
} -result {2 {} 2} -cleanup {
    catch {namespace delete ::test_ns_1}
    catch {namespace delete ::test_ns_2}
    catch {namespace delete ::test_ns_3}
    catch {namespace delete ::test_ns_4}
}
test namespace-51.13 {
    name resolution path control
    when the trace fires, ns_2 is being deleted but isn't gone yet, and is
    still visible for the trace
} -body {
    set ::result {}
    namespace eval ::test_ns_1 {
	proc foo {} {lappend ::result 1}
    }
    namespace eval ::test_ns_2 {
	proc foo {} {lappend ::result 2}
	trace add command foo delete "namespace eval ::test_ns_3 foo;#"

    namespace eval ::test_ns_4 {
	namespace path {::test_ns_2 ::test_ns_3 ::test_ns_1}
	proc bar {} {
	    list [foo] [namespace delete ::test_ns_2] [foo]
	}
	bar
    }

} -result {2 {} {2 3 2 1}} -cleanup {
    catch {namespace delete ::test_ns_1}
    catch {namespace delete ::test_ns_2}
    catch {namespace delete ::test_ns_3}
    catch {namespace delete ::test_ns_4}
}
test namespace-51.14 {name resolution path control} -setup {
    foreach cmd [info commands foo*] {

} -result 1


test namespace-56.6 {
	Namespace deletion traces on both the original routine and the imported
	routine should run without any memory error under a debug build.
} -body {
	variable res {} 

	proc ondelete {old new op} {
	    variable res
	    set tail [namespace tail $old] 
	    set up [namespace tail [namespace qualifiers $old]]
	    lappend res [list $up $tail]
	}
	

	namespace eval ns1 {} {
		namespace export *
		proc p1 {} {
			namespace upvar [namespace parent] res res
			incr res
		}
		trace add command p1 delete ondelete
	}

	namespace eval ns2 {} {
		namespace import [namespace parent]::ns1::p1
		trace add command p1 delete ondelete
	}

	namespace delete ns1
	namespace delete ns2
	after 1
	return $res
} -cleanup {
	unset res
	rename ondelete {}
} -result {{ns1 p1} {ns2 p1}}


test namespace-57.0 {
    an imported alias should be usable in the deletion trace for the alias

    see 29e8848eb976
} -body {