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-rw-r--r--generic/tclTrace.c308
1 files changed, 170 insertions, 138 deletions
diff --git a/generic/tclTrace.c b/generic/tclTrace.c
index 8f095b5..c0cde49 100644
--- a/generic/tclTrace.c
+++ b/generic/tclTrace.c
@@ -10,8 +10,6 @@
*
* See the file "license.terms" for information on usage and redistribution of
* this file, and for a DISCLAIMER OF ALL WARRANTIES.
- *
- * RCS: @(#) $Id: tclTrace.c,v 1.51 2008/09/05 01:20:00 msofer Exp $
*/
#include "tclInt.h"
@@ -24,11 +22,11 @@ typedef struct {
int flags; /* Operations for which Tcl command is to be
* invoked. */
size_t length; /* Number of non-NUL chars. in command. */
- char command[4]; /* Space for Tcl command to invoke. Actual
+ char command[1]; /* Space for Tcl command to invoke. Actual
* size will be as large as necessary to hold
* command. This field must be the last in the
- * structure, so that it can be larger than 4
- * bytes. */
+ * structure, so that it can be larger than 1
+ * byte. */
} TraceVarInfo;
typedef struct {
@@ -58,11 +56,11 @@ typedef struct {
* deleted too early. Keeps track of how many
* pieces of code have a pointer to this
* structure. */
- char command[4]; /* Space for Tcl command to invoke. Actual
+ char command[1]; /* Space for Tcl command to invoke. Actual
* size will be as large as necessary to hold
* command. This field must be the last in the
- * structure, so that it can be larger than 4
- * bytes. */
+ * structure, so that it can be larger than 1
+ * byte. */
} TraceCommandInfo;
/*
@@ -109,13 +107,13 @@ static Tcl_TraceTypeObjCmd TraceExecutionObjCmd;
* add to the list of supported trace types.
*/
-static const char *traceTypeOptions[] = {
+static const char *const traceTypeOptions[] = {
"execution", "command", "variable", NULL
};
static Tcl_TraceTypeObjCmd *const traceSubCmds[] = {
TraceExecutionObjCmd,
TraceCommandObjCmd,
- TraceVariableObjCmd,
+ TraceVariableObjCmd
};
/*
@@ -157,8 +155,8 @@ typedef struct StringTraceData {
#define FOREACH_VAR_TRACE(interp, name, clientData) \
(clientData) = NULL; \
- while (((clientData) = Tcl_VarTraceInfo((interp), (name), 0, \
- TraceVarProc, (clientData))) != NULL)
+ while (((clientData) = Tcl_VarTraceInfo2((interp), (name), NULL, \
+ 0, TraceVarProc, (clientData))) != NULL)
#define FOREACH_COMMAND_TRACE(interp, name, clientData) \
(clientData) = NULL; \
@@ -193,9 +191,10 @@ Tcl_TraceObjCmd(
Tcl_Obj *const objv[]) /* Argument objects. */
{
int optionIndex;
- char *name, *flagOps, *p;
+ const char *name;
+ const char *flagOps, *p;
/* Main sub commands to 'trace' */
- static const char *traceOptions[] = {
+ static const char *const traceOptions[] = {
"add", "info", "remove",
#ifndef TCL_REMOVE_OBSOLETE_TRACES
"variable", "vdelete", "vinfo",
@@ -238,7 +237,7 @@ Tcl_TraceObjCmd(
0, &typeIndex) != TCL_OK) {
return TCL_ERROR;
}
- return (traceSubCmds[typeIndex])(interp, optionIndex, objc, objv);
+ return traceSubCmds[typeIndex](interp, optionIndex, objc, objv);
}
case TRACE_INFO: {
/*
@@ -261,7 +260,7 @@ Tcl_TraceObjCmd(
0, &typeIndex) != TCL_OK) {
return TCL_ERROR;
}
- return (traceSubCmds[typeIndex])(interp, optionIndex, objc, objv);
+ return traceSubCmds[typeIndex](interp, optionIndex, objc, objv);
break;
}
@@ -305,9 +304,9 @@ Tcl_TraceObjCmd(
memcpy(copyObjv+1, objv, objc*sizeof(Tcl_Obj *));
copyObjv[4] = opsList;
if (optionIndex == TRACE_OLD_VARIABLE) {
- code = (traceSubCmds[2])(interp, TRACE_ADD, objc+1, copyObjv);
+ code = traceSubCmds[2](interp, TRACE_ADD, objc+1, copyObjv);
} else {
- code = (traceSubCmds[2])(interp, TRACE_REMOVE, objc+1, copyObjv);
+ code = traceSubCmds[2](interp, TRACE_REMOVE, objc+1, copyObjv);
}
Tcl_DecrRefCount(opsList);
return code;
@@ -325,26 +324,26 @@ Tcl_TraceObjCmd(
name = Tcl_GetString(objv[2]);
FOREACH_VAR_TRACE(interp, name, clientData) {
TraceVarInfo *tvarPtr = clientData;
+ char *q = ops;
pairObjPtr = Tcl_NewListObj(0, NULL);
- p = ops;
if (tvarPtr->flags & TCL_TRACE_READS) {
- *p = 'r';
- p++;
+ *q = 'r';
+ q++;
}
if (tvarPtr->flags & TCL_TRACE_WRITES) {
- *p = 'w';
- p++;
+ *q = 'w';
+ q++;
}
if (tvarPtr->flags & TCL_TRACE_UNSETS) {
- *p = 'u';
- p++;
+ *q = 'u';
+ q++;
}
if (tvarPtr->flags & TCL_TRACE_ARRAY) {
- *p = 'a';
- p++;
+ *q = 'a';
+ q++;
}
- *p = '\0';
+ *q = '\0';
/*
* Build a pair (2-item list) with the ops string as the first obj
@@ -367,8 +366,10 @@ Tcl_TraceObjCmd(
return TCL_OK;
badVarOps:
- Tcl_AppendResult(interp, "bad operations \"", flagOps,
- "\": should be one or more of rwua", NULL);
+ Tcl_SetObjResult(interp, Tcl_ObjPrintf(
+ "bad operations \"%s\": should be one or more of rwua",
+ flagOps));
+ Tcl_SetErrorCode(interp, "TCL", "OPERATION", "TRACE", "BADOPS", NULL);
return TCL_ERROR;
}
@@ -399,12 +400,12 @@ TraceExecutionObjCmd(
Tcl_Obj *const objv[]) /* Argument objects. */
{
int commandLength, index;
- char *name, *command;
+ const char *name, *command;
size_t length;
enum traceOptions {
TRACE_ADD, TRACE_INFO, TRACE_REMOVE
};
- static const char *opStrings[] = {
+ static const char *const opStrings[] = {
"enter", "leave", "enterstep", "leavestep", NULL
};
enum operations {
@@ -434,9 +435,11 @@ TraceExecutionObjCmd(
return result;
}
if (listLen == 0) {
- Tcl_SetResult(interp, "bad operation list \"\": must be "
- "one or more of enter, leave, enterstep, or leavestep",
- TCL_STATIC);
+ Tcl_SetObjResult(interp, Tcl_NewStringObj(
+ "bad operation list \"\": must be one or more of"
+ " enter, leave, enterstep, or leavestep", -1));
+ Tcl_SetErrorCode(interp, "TCL", "OPERATION", "TRACE", "NOOPS",
+ NULL);
return TCL_ERROR;
}
for (i = 0; i < listLen; i++) {
@@ -462,9 +465,8 @@ TraceExecutionObjCmd(
command = Tcl_GetStringFromObj(objv[5], &commandLength);
length = (size_t) commandLength;
if ((enum traceOptions) optionIndex == TRACE_ADD) {
- TraceCommandInfo *tcmdPtr = (TraceCommandInfo *)
- ckalloc((unsigned) (sizeof(TraceCommandInfo)
- - sizeof(tcmdPtr->command) + length + 1));
+ TraceCommandInfo *tcmdPtr = ckalloc(
+ TclOffset(TraceCommandInfo, command) + 1 + length);
tcmdPtr->flags = flags;
tcmdPtr->stepTrace = NULL;
@@ -477,11 +479,11 @@ TraceExecutionObjCmd(
TCL_TRACE_LEAVE_DURING_EXEC)) {
flags |= (TCL_TRACE_ENTER_EXEC | TCL_TRACE_LEAVE_EXEC);
}
- strcpy(tcmdPtr->command, command);
+ memcpy(tcmdPtr->command, command, length+1);
name = Tcl_GetString(objv[3]);
if (Tcl_TraceCommand(interp, name, flags, TraceCommandProc,
tcmdPtr) != TCL_OK) {
- ckfree((char *) tcmdPtr);
+ ckfree(tcmdPtr);
return TCL_ERROR;
}
} else {
@@ -532,7 +534,7 @@ TraceExecutionObjCmd(
Tcl_DeleteTrace(interp, tcmdPtr->stepTrace);
tcmdPtr->stepTrace = NULL;
if (tcmdPtr->startCmd != NULL) {
- ckfree((char *) tcmdPtr->startCmd);
+ ckfree(tcmdPtr->startCmd);
}
}
if (tcmdPtr->flags & TCL_TRACE_EXEC_IN_PROGRESS) {
@@ -543,7 +545,7 @@ TraceExecutionObjCmd(
tcmdPtr->flags = 0;
}
if ((--tcmdPtr->refCount) <= 0) {
- ckfree((char *) tcmdPtr);
+ ckfree(tcmdPtr);
}
break;
}
@@ -648,10 +650,10 @@ TraceCommandObjCmd(
Tcl_Obj *const objv[]) /* Argument objects. */
{
int commandLength, index;
- char *name, *command;
+ const char *name, *command;
size_t length;
enum traceOptions { TRACE_ADD, TRACE_INFO, TRACE_REMOVE };
- static const char *opStrings[] = { "delete", "rename", NULL };
+ static const char *const opStrings[] = { "delete", "rename", NULL };
enum operations { TRACE_CMD_DELETE, TRACE_CMD_RENAME };
switch ((enum traceOptions) optionIndex) {
@@ -676,8 +678,11 @@ TraceCommandObjCmd(
return result;
}
if (listLen == 0) {
- Tcl_SetResult(interp, "bad operation list \"\": must be "
- "one or more of delete or rename", TCL_STATIC);
+ Tcl_SetObjResult(interp, Tcl_NewStringObj(
+ "bad operation list \"\": must be one or more of"
+ " delete or rename", -1));
+ Tcl_SetErrorCode(interp, "TCL", "OPERATION", "TRACE", "NOOPS",
+ NULL);
return TCL_ERROR;
}
@@ -699,9 +704,8 @@ TraceCommandObjCmd(
command = Tcl_GetStringFromObj(objv[5], &commandLength);
length = (size_t) commandLength;
if ((enum traceOptions) optionIndex == TRACE_ADD) {
- TraceCommandInfo *tcmdPtr = (TraceCommandInfo *)
- ckalloc((unsigned) (sizeof(TraceCommandInfo)
- - sizeof(tcmdPtr->command) + length + 1));
+ TraceCommandInfo *tcmdPtr = ckalloc(
+ TclOffset(TraceCommandInfo, command) + 1 + length);
tcmdPtr->flags = flags;
tcmdPtr->stepTrace = NULL;
@@ -710,11 +714,11 @@ TraceCommandObjCmd(
tcmdPtr->length = length;
tcmdPtr->refCount = 1;
flags |= TCL_TRACE_DELETE;
- strcpy(tcmdPtr->command, command);
+ memcpy(tcmdPtr->command, command, length+1);
name = Tcl_GetString(objv[3]);
if (Tcl_TraceCommand(interp, name, flags, TraceCommandProc,
tcmdPtr) != TCL_OK) {
- ckfree((char *) tcmdPtr);
+ ckfree(tcmdPtr);
return TCL_ERROR;
}
} else {
@@ -745,7 +749,7 @@ TraceCommandObjCmd(
TraceCommandProc, clientData);
tcmdPtr->flags |= TCL_TRACE_DESTROYED;
if ((--tcmdPtr->refCount) <= 0) {
- ckfree((char *) tcmdPtr);
+ ckfree(tcmdPtr);
}
break;
}
@@ -840,10 +844,11 @@ TraceVariableObjCmd(
Tcl_Obj *const objv[]) /* Argument objects. */
{
int commandLength, index;
- char *name, *command;
+ const char *name, *command;
size_t length;
+ ClientData clientData;
enum traceOptions { TRACE_ADD, TRACE_INFO, TRACE_REMOVE };
- static const char *opStrings[] = {
+ static const char *const opStrings[] = {
"array", "read", "unset", "write", NULL
};
enum operations {
@@ -872,8 +877,11 @@ TraceVariableObjCmd(
return result;
}
if (listLen == 0) {
- Tcl_SetResult(interp, "bad operation list \"\": must be "
- "one or more of array, read, unset, or write", TCL_STATIC);
+ Tcl_SetObjResult(interp, Tcl_NewStringObj(
+ "bad operation list \"\": must be one or more of"
+ " array, read, unset, or write", -1));
+ Tcl_SetErrorCode(interp, "TCL", "OPERATION", "TRACE", "NOOPS",
+ NULL);
return TCL_ERROR;
}
for (i = 0; i < listLen ; i++) {
@@ -899,23 +907,24 @@ TraceVariableObjCmd(
command = Tcl_GetStringFromObj(objv[5], &commandLength);
length = (size_t) commandLength;
if ((enum traceOptions) optionIndex == TRACE_ADD) {
- CombinedTraceVarInfo *ctvarPtr = (CombinedTraceVarInfo *)
- ckalloc((unsigned) (sizeof(CombinedTraceVarInfo)
- + length + 1 - sizeof(ctvarPtr->traceCmdInfo.command)));
+ CombinedTraceVarInfo *ctvarPtr = ckalloc(
+ TclOffset(CombinedTraceVarInfo, traceCmdInfo.command)
+ + 1 + length);
+
ctvarPtr->traceCmdInfo.flags = flags;
if (objv[0] == NULL) {
ctvarPtr->traceCmdInfo.flags |= TCL_TRACE_OLD_STYLE;
}
ctvarPtr->traceCmdInfo.length = length;
flags |= TCL_TRACE_UNSETS | TCL_TRACE_RESULT_OBJECT;
- strcpy(ctvarPtr->traceCmdInfo.command, command);
+ memcpy(ctvarPtr->traceCmdInfo.command, command, length+1);
ctvarPtr->traceInfo.traceProc = TraceVarProc;
ctvarPtr->traceInfo.clientData = &ctvarPtr->traceCmdInfo;
ctvarPtr->traceInfo.flags = flags;
name = Tcl_GetString(objv[3]);
if (TraceVarEx(interp, name, NULL, (VarTrace *) ctvarPtr)
!= TCL_OK) {
- ckfree((char *) ctvarPtr);
+ ckfree(ctvarPtr);
return TCL_ERROR;
}
} else {
@@ -925,8 +934,6 @@ TraceVariableObjCmd(
* first one that matches.
*/
- ClientData clientData;
-
name = Tcl_GetString(objv[3]);
FOREACH_VAR_TRACE(interp, name, clientData) {
TraceVarInfo *tvarPtr = clientData;
@@ -945,7 +952,6 @@ TraceVariableObjCmd(
break;
}
case TRACE_INFO: {
- ClientData clientData;
Tcl_Obj *resultListPtr;
if (objc != 4) {
@@ -1112,7 +1118,7 @@ Tcl_TraceCommand(
* Set up trace information.
*/
- tracePtr = (CommandTrace *) ckalloc(sizeof(CommandTrace));
+ tracePtr = ckalloc(sizeof(CommandTrace));
tracePtr->traceProc = proc;
tracePtr->clientData = clientData;
tracePtr->flags = flags &
@@ -1121,8 +1127,18 @@ Tcl_TraceCommand(
tracePtr->refCount = 1;
cmdPtr->tracePtr = tracePtr;
if (tracePtr->flags & TCL_TRACE_ANY_EXEC) {
+ /*
+ * Bug 3484621: up the interp's epoch if this is a BC'ed command
+ */
+
+ if ((cmdPtr->compileProc != NULL) && !(cmdPtr->flags & CMD_HAS_EXEC_TRACES)){
+ Interp *iPtr = (Interp *) interp;
+ iPtr->compileEpoch++;
+ }
cmdPtr->flags |= CMD_HAS_EXEC_TRACES;
}
+
+
return TCL_OK;
}
@@ -1208,7 +1224,7 @@ Tcl_UntraceCommand(
tracePtr->flags = 0;
if ((--tracePtr->refCount) <= 0) {
- ckfree((char *) tracePtr);
+ ckfree(tracePtr);
}
if (hasExecTraces) {
@@ -1225,6 +1241,15 @@ Tcl_UntraceCommand(
*/
cmdPtr->flags &= ~CMD_HAS_EXEC_TRACES;
+
+ /*
+ * Bug 3484621: up the interp's epoch if this is a BC'ed command
+ */
+
+ if (cmdPtr->compileProc != NULL) {
+ Interp *iPtr = (Interp *) interp;
+ iPtr->compileEpoch++;
+ }
}
}
@@ -1276,9 +1301,9 @@ TraceCommandProc(
Tcl_DStringAppendElement(&cmd, oldName);
Tcl_DStringAppendElement(&cmd, (newName ? newName : ""));
if (flags & TCL_TRACE_RENAME) {
- Tcl_DStringAppend(&cmd, " rename", 7);
+ TclDStringAppendLiteral(&cmd, " rename");
} else if (flags & TCL_TRACE_DELETE) {
- Tcl_DStringAppend(&cmd, " delete", 7);
+ TclDStringAppendLiteral(&cmd, " delete");
}
/*
@@ -1297,7 +1322,7 @@ TraceCommandProc(
Tcl_DStringLength(&cmd), 0);
if (code != TCL_OK) {
/* We ignore errors in these traced commands */
- /*** QUESTION: Use Tcl_BackgroundError(interp); instead? ***/
+ /*** QUESTION: Use Tcl_BackgroundException(interp, code); instead? ***/
}
Tcl_DStringFree(&cmd);
}
@@ -1315,7 +1340,7 @@ TraceCommandProc(
Tcl_DeleteTrace(interp, tcmdPtr->stepTrace);
tcmdPtr->stepTrace = NULL;
if (tcmdPtr->startCmd != NULL) {
- ckfree((char *) tcmdPtr->startCmd);
+ ckfree(tcmdPtr->startCmd);
}
}
if (tcmdPtr->flags & TCL_TRACE_EXEC_IN_PROGRESS) {
@@ -1358,7 +1383,7 @@ TraceCommandProc(
tcmdPtr->refCount--;
}
if ((--tcmdPtr->refCount) <= 0) {
- ckfree((char *) tcmdPtr);
+ ckfree(tcmdPtr);
}
}
@@ -1450,7 +1475,7 @@ TclCheckExecutionTraces(
traceCode = TraceExecutionProc(tcmdPtr, interp, curLevel,
command, (Tcl_Command) cmdPtr, objc, objv);
if ((--tcmdPtr->refCount) <= 0) {
- ckfree((char *) tcmdPtr);
+ ckfree(tcmdPtr);
}
}
}
@@ -1460,7 +1485,11 @@ TclCheckExecutionTraces(
}
iPtr->activeCmdTracePtr = active.nextPtr;
if (state) {
- Tcl_RestoreInterpState(interp, state);
+ if (traceCode == TCL_OK) {
+ (void) Tcl_RestoreInterpState(interp, state);
+ } else {
+ Tcl_DiscardInterpState(state);
+ }
}
return traceCode;
@@ -1580,9 +1609,9 @@ TclCheckInterpTraces(
tcmdPtr->curFlags = traceFlags;
tcmdPtr->curCode = code;
}
- traceCode = (tracePtr->proc)(tracePtr->clientData,
- interp, curLevel, command, (Tcl_Command) cmdPtr,
- objc, objv);
+ traceCode = tracePtr->proc(tracePtr->clientData, interp,
+ curLevel, command, (Tcl_Command) cmdPtr, objc,
+ objv);
}
} else {
/*
@@ -1693,7 +1722,7 @@ CommandObjTraceDeleted(
TraceCommandInfo *tcmdPtr = clientData;
if ((--tcmdPtr->refCount) <= 0) {
- ckfree((char *) tcmdPtr);
+ ckfree(tcmdPtr);
}
}
@@ -1776,7 +1805,7 @@ TraceExecutionProc(
Tcl_DeleteTrace(interp, tcmdPtr->stepTrace);
tcmdPtr->stepTrace = NULL;
if (tcmdPtr->startCmd != NULL) {
- ckfree((char *) tcmdPtr->startCmd);
+ ckfree(tcmdPtr->startCmd);
}
}
@@ -1814,7 +1843,7 @@ TraceExecutionProc(
}
} else if (flags & TCL_TRACE_LEAVE_EXEC) {
Tcl_Obj *resultCode;
- char *resultCodeStr;
+ const char *resultCodeStr;
/*
* Append result code.
@@ -1908,7 +1937,7 @@ TraceExecutionProc(
}
if (call) {
if ((--tcmdPtr->refCount) <= 0) {
- ckfree((char *) tcmdPtr);
+ ckfree(tcmdPtr);
}
}
return traceCode;
@@ -1948,7 +1977,7 @@ TraceVarProc(
int code, destroy = 0;
Tcl_DString cmd;
int rewind = ((Interp *)interp)->execEnvPtr->rewind;
-
+
/*
* We might call Tcl_Eval() below, and that might evaluate [trace vdelete]
* which might try to free tvarPtr. We want to use tvarPtr until the end
@@ -1972,24 +2001,24 @@ TraceVarProc(
#ifndef TCL_REMOVE_OBSOLETE_TRACES
if (tvarPtr->flags & TCL_TRACE_OLD_STYLE) {
if (flags & TCL_TRACE_ARRAY) {
- Tcl_DStringAppend(&cmd, " a", 2);
+ TclDStringAppendLiteral(&cmd, " a");
} else if (flags & TCL_TRACE_READS) {
- Tcl_DStringAppend(&cmd, " r", 2);
+ TclDStringAppendLiteral(&cmd, " r");
} else if (flags & TCL_TRACE_WRITES) {
- Tcl_DStringAppend(&cmd, " w", 2);
+ TclDStringAppendLiteral(&cmd, " w");
} else if (flags & TCL_TRACE_UNSETS) {
- Tcl_DStringAppend(&cmd, " u", 2);
+ TclDStringAppendLiteral(&cmd, " u");
}
} else {
#endif
if (flags & TCL_TRACE_ARRAY) {
- Tcl_DStringAppend(&cmd, " array", 6);
+ TclDStringAppendLiteral(&cmd, " array");
} else if (flags & TCL_TRACE_READS) {
- Tcl_DStringAppend(&cmd, " read", 5);
+ TclDStringAppendLiteral(&cmd, " read");
} else if (flags & TCL_TRACE_WRITES) {
- Tcl_DStringAppend(&cmd, " write", 6);
+ TclDStringAppendLiteral(&cmd, " write");
} else if (flags & TCL_TRACE_UNSETS) {
- Tcl_DStringAppend(&cmd, " unset", 6);
+ TclDStringAppendLiteral(&cmd, " unset");
}
#ifndef TCL_REMOVE_OBSOLETE_TRACES
}
@@ -2025,6 +2054,7 @@ TraceVarProc(
}
if (code != TCL_OK) { /* copy error msg to result */
Tcl_Obj *errMsgObj = Tcl_GetObjResult(interp);
+
Tcl_IncrRefCount(errMsgObj);
result = (char *) errMsgObj;
}
@@ -2134,7 +2164,7 @@ Tcl_CreateObjTrace(
iPtr->tracesForbiddingInline++;
}
- tracePtr = (Trace *) ckalloc(sizeof(Trace));
+ tracePtr = ckalloc(sizeof(Trace));
tracePtr->level = level;
tracePtr->proc = proc;
tracePtr->clientData = clientData;
@@ -2197,8 +2227,7 @@ Tcl_CreateTrace(
* command. */
ClientData clientData) /* Arbitrary value word to pass to proc. */
{
- StringTraceData *data = (StringTraceData *)
- ckalloc(sizeof(StringTraceData));
+ StringTraceData *data = ckalloc(sizeof(StringTraceData));
data->clientData = clientData;
data->proc = proc;
@@ -2282,7 +2311,7 @@ static void
StringTraceDeleteProc(
ClientData clientData)
{
- ckfree((char *) clientData);
+ ckfree(clientData);
}
/*
@@ -2310,7 +2339,7 @@ Tcl_DeleteTrace(
{
Interp *iPtr = (Interp *) interp;
Trace *prevPtr, *tracePtr = (Trace *) trace;
- register Trace **tracePtr2 = &(iPtr->tracePtr);
+ register Trace **tracePtr2 = &iPtr->tracePtr;
ActiveInterpTrace *activePtr;
/*
@@ -2319,14 +2348,14 @@ Tcl_DeleteTrace(
*/
prevPtr = NULL;
- while ((*tracePtr2) != NULL && (*tracePtr2) != tracePtr) {
+ while (*tracePtr2 != NULL && *tracePtr2 != tracePtr) {
prevPtr = *tracePtr2;
- tracePtr2 = &((*tracePtr2)->nextPtr);
+ tracePtr2 = &prevPtr->nextPtr;
}
if (*tracePtr2 == NULL) {
return;
}
- (*tracePtr2) = (*tracePtr2)->nextPtr;
+ *tracePtr2 = (*tracePtr2)->nextPtr;
/*
* The code below makes it possible to delete traces while traces are
@@ -2365,7 +2394,7 @@ Tcl_DeleteTrace(
*/
if (tracePtr->delProc != NULL) {
- (tracePtr->delProc)(tracePtr->clientData);
+ tracePtr->delProc(tracePtr->clientData);
}
/*
@@ -2477,7 +2506,7 @@ TclObjCallVarTraces(
* variable, or -1. Only used when part1Ptr is
* NULL. */
{
- char *part1, *part2;
+ const char *part1, *part2;
if (!part1Ptr) {
part1Ptr = localName(iPtr->varFramePtr, index);
@@ -2555,7 +2584,7 @@ TclCallVarTraces(
char *newPart1;
Tcl_DStringInit(&nameCopy);
- Tcl_DStringAppend(&nameCopy, part1, (p-part1));
+ Tcl_DStringAppend(&nameCopy, part1, p-part1);
newPart1 = Tcl_DStringValue(&nameCopy);
newPart1[offset] = 0;
part1 = newPart1;
@@ -2672,53 +2701,42 @@ TclCallVarTraces(
done:
if (code == TCL_ERROR) {
if (leaveErrMsg) {
+ const char *verb = "";
const char *type = "";
- Tcl_Obj *options = Tcl_GetReturnOptions((Tcl_Interp *)iPtr, code);
- Tcl_Obj *errorInfoKey, *errorInfo;
-
- TclNewLiteralStringObj(errorInfoKey, "-errorinfo");
- Tcl_IncrRefCount(errorInfoKey);
- Tcl_DictObjGet(NULL, options, errorInfoKey, &errorInfo);
- Tcl_IncrRefCount(errorInfo);
- Tcl_DictObjRemove(NULL, options, errorInfoKey);
- if (Tcl_IsShared(errorInfo)) {
- Tcl_DecrRefCount(errorInfo);
- errorInfo = Tcl_DuplicateObj(errorInfo);
- Tcl_IncrRefCount(errorInfo);
- }
- Tcl_AppendToObj(errorInfo, "\n (", -1);
+
switch (flags&(TCL_TRACE_READS|TCL_TRACE_WRITES|TCL_TRACE_ARRAY)) {
case TCL_TRACE_READS:
- type = "read";
- Tcl_AppendToObj(errorInfo, type, -1);
+ verb = "read";
+ type = verb;
break;
case TCL_TRACE_WRITES:
- type = "set";
- Tcl_AppendToObj(errorInfo, "write", -1);
+ verb = "set";
+ type = "write";
break;
case TCL_TRACE_ARRAY:
- type = "trace array";
- Tcl_AppendToObj(errorInfo, "array", -1);
+ verb = "trace array";
+ type = "array";
break;
}
+
+ if (disposeFlags & TCL_TRACE_RESULT_OBJECT) {
+ Tcl_SetObjResult((Tcl_Interp *)iPtr, (Tcl_Obj *) result);
+ } else {
+ Tcl_SetObjResult((Tcl_Interp *)iPtr,
+ Tcl_NewStringObj(result, -1));
+ }
+ Tcl_AddErrorInfo((Tcl_Interp *)iPtr, "");
+
+ Tcl_AppendObjToErrorInfo((Tcl_Interp *)iPtr, Tcl_ObjPrintf(
+ "\n (%s trace on \"%s%s%s%s\")", type, part1,
+ (part2 ? "(" : ""), (part2 ? part2 : ""),
+ (part2 ? ")" : "") ));
if (disposeFlags & TCL_TRACE_RESULT_OBJECT) {
- TclVarErrMsg((Tcl_Interp *) iPtr, part1, part2, type,
+ TclVarErrMsg((Tcl_Interp *) iPtr, part1, part2, verb,
Tcl_GetString((Tcl_Obj *) result));
} else {
- TclVarErrMsg((Tcl_Interp *) iPtr, part1, part2, type, result);
- }
- Tcl_AppendToObj(errorInfo, " trace on \"", -1);
- Tcl_AppendToObj(errorInfo, part1, -1);
- if (part2 != NULL) {
- Tcl_AppendToObj(errorInfo, "(", -1);
- Tcl_AppendToObj(errorInfo, part1, -1);
- Tcl_AppendToObj(errorInfo, ")", -1);
- }
- Tcl_AppendToObj(errorInfo, "\")", -1);
- Tcl_DictObjPut(NULL, options, errorInfoKey, errorInfo);
- Tcl_DecrRefCount(errorInfoKey);
- Tcl_DecrRefCount(errorInfo);
- code = Tcl_SetReturnOptions((Tcl_Interp *) iPtr, options);
+ TclVarErrMsg((Tcl_Interp *) iPtr, part1, part2, verb, result);
+ }
iPtr->flags &= ~(ERR_ALREADY_LOGGED);
Tcl_DiscardInterpState(state);
} else {
@@ -2797,6 +2815,7 @@ DisposeTraceResult(
*----------------------------------------------------------------------
*/
+#undef Tcl_UntraceVar
void
Tcl_UntraceVar(
Tcl_Interp *interp, /* Interpreter containing variable. */
@@ -2892,6 +2911,16 @@ Tcl_UntraceVar2(
* The code below makes it possible to delete traces while traces are
* active: it makes sure that the deleted trace won't be processed by
* TclCallVarTraces.
+ *
+ * Caveat (Bug 3062331): When an unset trace handler on a variable
+ * tries to delete a different unset trace handler on the same variable,
+ * the results may be surprising. When variable unset traces fire, the
+ * traced variable is already gone. So the TclLookupVar() call above
+ * will not find that variable, and not finding it will never reach here
+ * to perform the deletion. This means callers of Tcl_UntraceVar*()
+ * attempting to delete unset traces from within the handler of another
+ * unset trace have to account for the possibility that their call to
+ * Tcl_UntraceVar*() is a no-op.
*/
for (activePtr = iPtr->activeVarTracePtr; activePtr != NULL;
@@ -2910,6 +2939,7 @@ Tcl_UntraceVar2(
} else {
prevPtr->nextPtr = nextPtr;
}
+ tracePtr->nextPtr = NULL;
Tcl_EventuallyFree(tracePtr, TCL_DYNAMIC);
for (tracePtr = nextPtr; tracePtr != NULL;
@@ -2954,6 +2984,7 @@ Tcl_UntraceVar2(
*----------------------------------------------------------------------
*/
+#undef Tcl_VarTraceInfo
ClientData
Tcl_VarTraceInfo(
Tcl_Interp *interp, /* Interpreter containing variable. */
@@ -3062,6 +3093,7 @@ Tcl_VarTraceInfo2(
*----------------------------------------------------------------------
*/
+#undef Tcl_TraceVar
int
Tcl_TraceVar(
Tcl_Interp *interp, /* Interpreter in which variable is to be
@@ -3119,7 +3151,7 @@ Tcl_TraceVar2(
register VarTrace *tracePtr;
int result;
- tracePtr = (VarTrace *) ckalloc(sizeof(VarTrace));
+ tracePtr = ckalloc(sizeof(VarTrace));
tracePtr->traceProc = proc;
tracePtr->clientData = clientData;
tracePtr->flags = flags;
@@ -3127,7 +3159,7 @@ Tcl_TraceVar2(
result = TraceVarEx(interp, part1, part2, tracePtr);
if (result != TCL_OK) {
- ckfree((char *) tracePtr);
+ ckfree(tracePtr);
}
return result;
}
@@ -3209,7 +3241,7 @@ TraceVarEx(
#endif
tracePtr->flags = tracePtr->flags & flagMask;
- hPtr = Tcl_CreateHashEntry(&iPtr->varTraces, (char *) varPtr, &isNew);
+ hPtr = Tcl_CreateHashEntry(&iPtr->varTraces, varPtr, &isNew);
if (isNew) {
tracePtr->nextPtr = NULL;
} else {
generated by cgit v0.12 at 2025-11-16 00:53:39 (GMT)