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-rw-r--r--generic/tclTrace.c493
1 files changed, 269 insertions, 224 deletions
diff --git a/generic/tclTrace.c b/generic/tclTrace.c
index 346defc..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 1.47.2.2 2009/10/17 22:35:58 dkf 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 *traceSubCmds[] = {
+static Tcl_TraceTypeObjCmd *const traceSubCmds[] = {
TraceExecutionObjCmd,
TraceCommandObjCmd,
- TraceVariableObjCmd,
+ TraceVariableObjCmd
};
/*
@@ -149,6 +147,21 @@ typedef struct StringTraceData {
ClientData clientData; /* Client data from Tcl_CreateTrace */
Tcl_CmdTraceProc *proc; /* Trace function from Tcl_CreateTrace */
} StringTraceData;
+
+/*
+ * Convenience macros for iterating over the list of traces. Note that each of
+ * these *must* be treated as a command, and *must* have a block following it.
+ */
+
+#define FOREACH_VAR_TRACE(interp, name, clientData) \
+ (clientData) = NULL; \
+ while (((clientData) = Tcl_VarTraceInfo2((interp), (name), NULL, \
+ 0, TraceVarProc, (clientData))) != NULL)
+
+#define FOREACH_COMMAND_TRACE(interp, name, clientData) \
+ (clientData) = NULL; \
+ while ((clientData = Tcl_CommandTraceInfo(interp, name, 0, \
+ TraceCommandProc, clientData)) != NULL)
/*
*----------------------------------------------------------------------
@@ -178,9 +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",
@@ -196,12 +210,12 @@ Tcl_TraceObjCmd(
};
if (objc < 2) {
- Tcl_WrongNumArgs(interp, 1, objv, "option ?arg arg ...?");
+ Tcl_WrongNumArgs(interp, 1, objv, "option ?arg ...?");
return TCL_ERROR;
}
- if (Tcl_GetIndexFromObj(interp, objv[1], traceOptions,
- "option", 0, &optionIndex) != TCL_OK) {
+ if (Tcl_GetIndexFromObj(interp, objv[1], traceOptions, "option", 0,
+ &optionIndex) != TCL_OK) {
return TCL_ERROR;
}
switch ((enum traceOptions) optionIndex) {
@@ -216,14 +230,14 @@ Tcl_TraceObjCmd(
int typeIndex;
if (objc < 3) {
- Tcl_WrongNumArgs(interp, 2, objv, "type ?arg arg ...?");
+ Tcl_WrongNumArgs(interp, 2, objv, "type ?arg ...?");
return TCL_ERROR;
}
if (Tcl_GetIndexFromObj(interp, objv[2], traceTypeOptions, "option",
0, &typeIndex) != TCL_OK) {
return TCL_ERROR;
}
- return (traceSubCmds[typeIndex])(interp, optionIndex, objc, objv);
+ return traceSubCmds[typeIndex](interp, optionIndex, objc, objv);
}
case TRACE_INFO: {
/*
@@ -246,7 +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;
}
@@ -290,9 +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;
@@ -307,32 +321,29 @@ Tcl_TraceObjCmd(
return TCL_ERROR;
}
resultListPtr = Tcl_NewObj();
- clientData = 0;
name = Tcl_GetString(objv[2]);
- while ((clientData = Tcl_VarTraceInfo(interp, name, 0,
- TraceVarProc, clientData)) != 0) {
-
- TraceVarInfo *tvarPtr = (TraceVarInfo *) clientData;
+ 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
@@ -355,8 +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;
}
@@ -387,12 +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 {
@@ -422,9 +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++) {
@@ -450,11 +465,9 @@ TraceExecutionObjCmd(
command = Tcl_GetStringFromObj(objv[5], &commandLength);
length = (size_t) commandLength;
if ((enum traceOptions) optionIndex == TRACE_ADD) {
- TraceCommandInfo *tcmdPtr;
+ TraceCommandInfo *tcmdPtr = ckalloc(
+ TclOffset(TraceCommandInfo, command) + 1 + length);
- tcmdPtr = (TraceCommandInfo *) ckalloc((unsigned)
- (sizeof(TraceCommandInfo) - sizeof(tcmdPtr->command)
- + length + 1));
tcmdPtr->flags = flags;
tcmdPtr->stepTrace = NULL;
tcmdPtr->startLevel = 0;
@@ -466,11 +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,
- (ClientData) tcmdPtr) != TCL_OK) {
- ckfree((char *) tcmdPtr);
+ tcmdPtr) != TCL_OK) {
+ ckfree(tcmdPtr);
return TCL_ERROR;
}
} else {
@@ -480,21 +493,19 @@ TraceExecutionObjCmd(
* first one that matches.
*/
- TraceCommandInfo *tcmdPtr;
- ClientData clientData = NULL;
- name = Tcl_GetString(objv[3]);
+ ClientData clientData;
/*
* First ensure the name given is valid.
*/
+ name = Tcl_GetString(objv[3]);
if (Tcl_FindCommand(interp,name,NULL,TCL_LEAVE_ERR_MSG) == NULL) {
return TCL_ERROR;
}
- while ((clientData = Tcl_CommandTraceInfo(interp, name, 0,
- TraceCommandProc, clientData)) != NULL) {
- tcmdPtr = (TraceCommandInfo *) clientData;
+ FOREACH_COMMAND_TRACE(interp, name, clientData) {
+ TraceCommandInfo *tcmdPtr = clientData;
/*
* In checking the 'flags' field we must remove any extraneous
@@ -523,7 +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) {
@@ -534,7 +545,7 @@ TraceExecutionObjCmd(
tcmdPtr->flags = 0;
}
if ((--tcmdPtr->refCount) <= 0) {
- ckfree((char *) tcmdPtr);
+ ckfree(tcmdPtr);
}
break;
}
@@ -544,14 +555,13 @@ TraceExecutionObjCmd(
}
case TRACE_INFO: {
ClientData clientData;
- Tcl_Obj *resultListPtr, *eachTraceObjPtr, *elemObjPtr;
+ Tcl_Obj *resultListPtr;
if (objc != 4) {
Tcl_WrongNumArgs(interp, 3, objv, "name");
return TCL_ERROR;
}
- clientData = NULL;
name = Tcl_GetString(objv[3]);
/*
@@ -563,11 +573,10 @@ TraceExecutionObjCmd(
}
resultListPtr = Tcl_NewListObj(0, NULL);
- while ((clientData = Tcl_CommandTraceInfo(interp, name, 0,
- TraceCommandProc, clientData)) != NULL) {
+ FOREACH_COMMAND_TRACE(interp, name, clientData) {
int numOps = 0;
- Tcl_Obj *opObj;
- TraceCommandInfo *tcmdPtr = (TraceCommandInfo *) clientData;
+ Tcl_Obj *opObj, *eachTraceObjPtr, *elemObjPtr;
+ TraceCommandInfo *tcmdPtr = clientData;
/*
* Build a list with the ops list as the first obj element and the
@@ -641,10 +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) {
@@ -669,8 +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;
}
@@ -692,11 +704,9 @@ TraceCommandObjCmd(
command = Tcl_GetStringFromObj(objv[5], &commandLength);
length = (size_t) commandLength;
if ((enum traceOptions) optionIndex == TRACE_ADD) {
- TraceCommandInfo *tcmdPtr;
+ TraceCommandInfo *tcmdPtr = ckalloc(
+ TclOffset(TraceCommandInfo, command) + 1 + length);
- tcmdPtr = (TraceCommandInfo *) ckalloc((unsigned)
- (sizeof(TraceCommandInfo) - sizeof(tcmdPtr->command)
- + length + 1));
tcmdPtr->flags = flags;
tcmdPtr->stepTrace = NULL;
tcmdPtr->startLevel = 0;
@@ -704,11 +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,
- (ClientData) tcmdPtr) != TCL_OK) {
- ckfree((char *) tcmdPtr);
+ tcmdPtr) != TCL_OK) {
+ ckfree(tcmdPtr);
return TCL_ERROR;
}
} else {
@@ -718,30 +728,28 @@ TraceCommandObjCmd(
* first one that matches.
*/
- TraceCommandInfo *tcmdPtr;
- ClientData clientData = NULL;
- name = Tcl_GetString(objv[3]);
+ ClientData clientData;
/*
* First ensure the name given is valid.
*/
+ name = Tcl_GetString(objv[3]);
if (Tcl_FindCommand(interp,name,NULL,TCL_LEAVE_ERR_MSG) == NULL) {
return TCL_ERROR;
}
- while ((clientData = Tcl_CommandTraceInfo(interp, name, 0,
- TraceCommandProc, clientData)) != NULL) {
- tcmdPtr = (TraceCommandInfo *) clientData;
- if ((tcmdPtr->length == length)
- && (tcmdPtr->flags == flags)
+ FOREACH_COMMAND_TRACE(interp, name, clientData) {
+ TraceCommandInfo *tcmdPtr = clientData;
+
+ if ((tcmdPtr->length == length) && (tcmdPtr->flags == flags)
&& (strncmp(command, tcmdPtr->command,
(size_t) length) == 0)) {
Tcl_UntraceCommand(interp, name, flags | TCL_TRACE_DELETE,
TraceCommandProc, clientData);
tcmdPtr->flags |= TCL_TRACE_DESTROYED;
if ((--tcmdPtr->refCount) <= 0) {
- ckfree((char *) tcmdPtr);
+ ckfree(tcmdPtr);
}
break;
}
@@ -751,30 +759,27 @@ TraceCommandObjCmd(
}
case TRACE_INFO: {
ClientData clientData;
- Tcl_Obj *resultListPtr, *eachTraceObjPtr, *elemObjPtr;
+ Tcl_Obj *resultListPtr;
if (objc != 4) {
Tcl_WrongNumArgs(interp, 3, objv, "name");
return TCL_ERROR;
}
- clientData = NULL;
- name = Tcl_GetString(objv[3]);
-
/*
* First ensure the name given is valid.
*/
+ name = Tcl_GetString(objv[3]);
if (Tcl_FindCommand(interp, name, NULL, TCL_LEAVE_ERR_MSG) == NULL) {
return TCL_ERROR;
}
resultListPtr = Tcl_NewListObj(0, NULL);
- while ((clientData = Tcl_CommandTraceInfo(interp, name, 0,
- TraceCommandProc, clientData)) != NULL) {
+ FOREACH_COMMAND_TRACE(interp, name, clientData) {
int numOps = 0;
- Tcl_Obj *opObj;
- TraceCommandInfo *tcmdPtr = (TraceCommandInfo *) clientData;
+ Tcl_Obj *opObj, *eachTraceObjPtr, *elemObjPtr;
+ TraceCommandInfo *tcmdPtr = clientData;
/*
* Build a list with the ops list as the first obj element and the
@@ -839,10 +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 {
@@ -871,8 +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++) {
@@ -898,25 +907,24 @@ TraceVariableObjCmd(
command = Tcl_GetStringFromObj(objv[5], &commandLength);
length = (size_t) commandLength;
if ((enum traceOptions) optionIndex == TRACE_ADD) {
- CombinedTraceVarInfo *ctvarPtr;
+ CombinedTraceVarInfo *ctvarPtr = ckalloc(
+ TclOffset(CombinedTraceVarInfo, traceCmdInfo.command)
+ + 1 + length);
- ctvarPtr = (CombinedTraceVarInfo *) ckalloc((unsigned)
- (sizeof(CombinedTraceVarInfo) + length + 1
- - sizeof(ctvarPtr->traceCmdInfo.command)));
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 = (ClientData)
- &ctvarPtr->traceCmdInfo;
+ 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);
+ if (TraceVarEx(interp, name, NULL, (VarTrace *) ctvarPtr)
+ != TCL_OK) {
+ ckfree(ctvarPtr);
return TCL_ERROR;
}
} else {
@@ -926,12 +934,10 @@ TraceVariableObjCmd(
* first one that matches.
*/
- TraceVarInfo *tvarPtr;
- ClientData clientData = 0;
name = Tcl_GetString(objv[3]);
- while ((clientData = Tcl_VarTraceInfo(interp, name, 0,
- TraceVarProc, clientData)) != 0) {
- tvarPtr = (TraceVarInfo *) clientData;
+ FOREACH_VAR_TRACE(interp, name, clientData) {
+ TraceVarInfo *tvarPtr = clientData;
+
if ((tvarPtr->length == length)
&& ((tvarPtr->flags & ~TCL_TRACE_OLD_STYLE)==flags)
&& (strncmp(command, tvarPtr->command,
@@ -946,8 +952,7 @@ TraceVariableObjCmd(
break;
}
case TRACE_INFO: {
- ClientData clientData;
- Tcl_Obj *resultListPtr, *eachTraceObjPtr, *elemObjPtr;
+ Tcl_Obj *resultListPtr;
if (objc != 4) {
Tcl_WrongNumArgs(interp, 3, objv, "name");
@@ -955,12 +960,10 @@ TraceVariableObjCmd(
}
resultListPtr = Tcl_NewObj();
- clientData = 0;
name = Tcl_GetString(objv[3]);
- while ((clientData = Tcl_VarTraceInfo(interp, name, 0, TraceVarProc,
- clientData)) != 0) {
- Tcl_Obj *opObj;
- TraceVarInfo *tvarPtr = (TraceVarInfo *) clientData;
+ FOREACH_VAR_TRACE(interp, name, clientData) {
+ Tcl_Obj *opObjPtr, *eachTraceObjPtr, *elemObjPtr;
+ TraceVarInfo *tvarPtr = clientData;
/*
* Build a list with the ops list as the first obj element and the
@@ -970,20 +973,20 @@ TraceVariableObjCmd(
elemObjPtr = Tcl_NewListObj(0, NULL);
if (tvarPtr->flags & TCL_TRACE_ARRAY) {
- TclNewLiteralStringObj(opObj, "array");
- Tcl_ListObjAppendElement(NULL, elemObjPtr, opObj);
+ TclNewLiteralStringObj(opObjPtr, "array");
+ Tcl_ListObjAppendElement(NULL, elemObjPtr, opObjPtr);
}
if (tvarPtr->flags & TCL_TRACE_READS) {
- TclNewLiteralStringObj(opObj, "read");
- Tcl_ListObjAppendElement(NULL, elemObjPtr, opObj);
+ TclNewLiteralStringObj(opObjPtr, "read");
+ Tcl_ListObjAppendElement(NULL, elemObjPtr, opObjPtr);
}
if (tvarPtr->flags & TCL_TRACE_WRITES) {
- TclNewLiteralStringObj(opObj, "write");
- Tcl_ListObjAppendElement(NULL, elemObjPtr, opObj);
+ TclNewLiteralStringObj(opObjPtr, "write");
+ Tcl_ListObjAppendElement(NULL, elemObjPtr, opObjPtr);
}
if (tvarPtr->flags & TCL_TRACE_UNSETS) {
- TclNewLiteralStringObj(opObj, "unset");
- Tcl_ListObjAppendElement(NULL, elemObjPtr, opObj);
+ TclNewLiteralStringObj(opObjPtr, "unset");
+ Tcl_ListObjAppendElement(NULL, elemObjPtr, opObjPtr);
}
eachTraceObjPtr = Tcl_NewListObj(0, NULL);
Tcl_ListObjAppendElement(NULL, eachTraceObjPtr, elemObjPtr);
@@ -1115,7 +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 &
@@ -1124,8 +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;
}
@@ -1211,7 +1224,7 @@ Tcl_UntraceCommand(
tracePtr->flags = 0;
if ((--tracePtr->refCount) <= 0) {
- ckfree((char *) tracePtr);
+ ckfree(tracePtr);
}
if (hasExecTraces) {
@@ -1228,6 +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++;
+ }
}
}
@@ -1261,7 +1283,7 @@ TraceCommandProc(
int flags) /* OR-ed bits giving operation and other
* information. */
{
- TraceCommandInfo *tcmdPtr = (TraceCommandInfo *) clientData;
+ TraceCommandInfo *tcmdPtr = clientData;
int code;
Tcl_DString cmd;
@@ -1279,9 +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");
}
/*
@@ -1300,7 +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);
}
@@ -1318,7 +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) {
@@ -1357,11 +1379,11 @@ TraceCommandProc(
state = Tcl_SaveInterpState(interp, TCL_OK);
Tcl_UntraceCommand(interp, oldName, untraceFlags,
TraceCommandProc, clientData);
- (void) Tcl_RestoreInterpState(interp, state);
+ Tcl_RestoreInterpState(interp, state);
tcmdPtr->refCount--;
}
if ((--tcmdPtr->refCount) <= 0) {
- ckfree((char *) tcmdPtr);
+ ckfree(tcmdPtr);
}
}
@@ -1441,8 +1463,7 @@ TclCheckExecutionTraces(
active.nextTracePtr = tracePtr->nextPtr;
}
if (tracePtr->traceProc == TraceCommandProc) {
- TraceCommandInfo *tcmdPtr = (TraceCommandInfo *)
- tracePtr->clientData;
+ TraceCommandInfo *tcmdPtr = tracePtr->clientData;
if (tcmdPtr->flags != 0) {
tcmdPtr->curFlags = traceFlags | TCL_TRACE_EXEC_DIRECT;
@@ -1451,10 +1472,10 @@ TclCheckExecutionTraces(
if (state == NULL) {
state = Tcl_SaveInterpState(interp, code);
}
- traceCode = TraceExecutionProc((ClientData) tcmdPtr, interp,
- curLevel, command, (Tcl_Command) cmdPtr, objc, objv);
+ traceCode = TraceExecutionProc(tcmdPtr, interp, curLevel,
+ command, (Tcl_Command) cmdPtr, objc, objv);
if ((--tcmdPtr->refCount) <= 0) {
- ckfree((char *) tcmdPtr);
+ ckfree(tcmdPtr);
}
}
}
@@ -1464,10 +1485,14 @@ TclCheckExecutionTraces(
}
iPtr->activeCmdTracePtr = active.nextPtr;
if (state) {
- (void) Tcl_RestoreInterpState(interp, state);
+ if (traceCode == TCL_OK) {
+ (void) Tcl_RestoreInterpState(interp, state);
+ } else {
+ Tcl_DiscardInterpState(state);
+ }
}
- return(traceCode);
+ return traceCode;
}
/*
@@ -1565,7 +1590,7 @@ TclCheckInterpTraces(
* it.
*/
- Tcl_Preserve((ClientData) tracePtr);
+ Tcl_Preserve(tracePtr);
tracePtr->flags |= TCL_TRACE_EXEC_IN_PROGRESS;
if (state == NULL) {
state = Tcl_SaveInterpState(interp, code);
@@ -1579,15 +1604,14 @@ TclCheckInterpTraces(
if (tracePtr->flags & traceFlags) {
if (tracePtr->proc == TraceExecutionProc) {
- TraceCommandInfo *tcmdPtr = (TraceCommandInfo *)
- tracePtr->clientData;
+ TraceCommandInfo *tcmdPtr = tracePtr->clientData;
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 {
/*
@@ -1605,19 +1629,19 @@ TclCheckInterpTraces(
}
}
tracePtr->flags &= ~TCL_TRACE_EXEC_IN_PROGRESS;
- Tcl_Release((ClientData) tracePtr);
+ Tcl_Release(tracePtr);
}
}
iPtr->activeInterpTracePtr = active.nextPtr;
if (state) {
if (traceCode == TCL_OK) {
- (void) Tcl_RestoreInterpState(interp, state);
+ Tcl_RestoreInterpState(interp, state);
} else {
Tcl_DiscardInterpState(state);
}
}
- return(traceCode);
+ return traceCode;
}
/*
@@ -1659,7 +1683,7 @@ CallTraceFunction(
* Copy the command characters into a new string.
*/
- commandCopy = TclStackAlloc(interp, (unsigned) (numChars + 1));
+ commandCopy = TclStackAlloc(interp, (unsigned) numChars + 1);
memcpy(commandCopy, command, (size_t) numChars);
commandCopy[numChars] = '\0';
@@ -1667,7 +1691,7 @@ CallTraceFunction(
* Call the trace function then free allocated storage.
*/
- traceCode = (tracePtr->proc)(tracePtr->clientData, (Tcl_Interp *) iPtr,
+ traceCode = tracePtr->proc(tracePtr->clientData, (Tcl_Interp *) iPtr,
iPtr->numLevels, commandCopy, (Tcl_Command) cmdPtr, objc, objv);
TclStackFree(interp, commandCopy);
@@ -1695,10 +1719,10 @@ static void
CommandObjTraceDeleted(
ClientData clientData)
{
- TraceCommandInfo *tcmdPtr = (TraceCommandInfo *) clientData;
+ TraceCommandInfo *tcmdPtr = clientData;
if ((--tcmdPtr->refCount) <= 0) {
- ckfree((char *) tcmdPtr);
+ ckfree(tcmdPtr);
}
}
@@ -1739,7 +1763,7 @@ TraceExecutionProc(
{
int call = 0;
Interp *iPtr = (Interp *) interp;
- TraceCommandInfo *tcmdPtr = (TraceCommandInfo *) clientData;
+ TraceCommandInfo *tcmdPtr = clientData;
int flags = tcmdPtr->curFlags;
int code = tcmdPtr->curCode;
int traceCode = TCL_OK;
@@ -1781,7 +1805,7 @@ TraceExecutionProc(
Tcl_DeleteTrace(interp, tcmdPtr->stepTrace);
tcmdPtr->stepTrace = NULL;
if (tcmdPtr->startCmd != NULL) {
- ckfree((char *) tcmdPtr->startCmd);
+ ckfree(tcmdPtr->startCmd);
}
}
@@ -1790,8 +1814,7 @@ TraceExecutionProc(
*/
if (call) {
- Tcl_DString cmd;
- Tcl_DString sub;
+ Tcl_DString cmd, sub;
int i, saveInterpFlags;
Tcl_DStringInit(&cmd);
@@ -1820,7 +1843,7 @@ TraceExecutionProc(
}
} else if (flags & TCL_TRACE_LEAVE_EXEC) {
Tcl_Obj *resultCode;
- char *resultCodeStr;
+ const char *resultCodeStr;
/*
* Append result code.
@@ -1900,8 +1923,7 @@ TraceExecutionProc(
tcmdPtr->refCount++;
tcmdPtr->stepTrace = Tcl_CreateObjTrace(interp, 0,
(tcmdPtr->flags & TCL_TRACE_ANY_EXEC) >> 2,
- TraceExecutionProc, (ClientData)tcmdPtr,
- CommandObjTraceDeleted);
+ TraceExecutionProc, tcmdPtr, CommandObjTraceDeleted);
}
}
if (flags & TCL_TRACE_DESTROYED) {
@@ -1915,7 +1937,7 @@ TraceExecutionProc(
}
if (call) {
if ((--tcmdPtr->refCount) <= 0) {
- ckfree((char *) tcmdPtr);
+ ckfree(tcmdPtr);
}
}
return traceCode;
@@ -1950,10 +1972,11 @@ TraceVarProc(
int flags) /* OR-ed bits giving operation and other
* information. */
{
- TraceVarInfo *tvarPtr = (TraceVarInfo *) clientData;
+ TraceVarInfo *tvarPtr = clientData;
char *result;
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]
@@ -1978,24 +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
}
@@ -2015,10 +2038,23 @@ TraceVarProc(
destroy = 1;
tvarPtr->flags |= TCL_TRACE_DESTROYED;
}
+
+ /*
+ * Make sure that unset traces are rune even if the execEnv is
+ * rewinding (coroutine deletion, [Bug 2093947]
+ */
+
+ if (rewind && (flags & TCL_TRACE_UNSETS)) {
+ ((Interp *)interp)->execEnvPtr->rewind = 0;
+ }
code = Tcl_EvalEx(interp, Tcl_DStringValue(&cmd),
Tcl_DStringLength(&cmd), 0);
+ if (rewind) {
+ ((Interp *)interp)->execEnvPtr->rewind = rewind;
+ }
if (code != TCL_OK) { /* copy error msg to result */
Tcl_Obj *errMsgObj = Tcl_GetObjResult(interp);
+
Tcl_IncrRefCount(errMsgObj);
result = (char *) errMsgObj;
}
@@ -2128,7 +2164,7 @@ Tcl_CreateObjTrace(
iPtr->tracesForbiddingInline++;
}
- tracePtr = (Trace *) ckalloc(sizeof(Trace));
+ tracePtr = ckalloc(sizeof(Trace));
tracePtr->level = level;
tracePtr->proc = proc;
tracePtr->clientData = clientData;
@@ -2191,13 +2227,12 @@ 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;
return Tcl_CreateObjTrace(interp, level, 0, StringTraceProc,
- (ClientData) data, StringTraceDeleteProc);
+ data, StringTraceDeleteProc);
}
/*
@@ -2226,7 +2261,7 @@ StringTraceProc(
int objc,
Tcl_Obj *const *objv)
{
- StringTraceData *data = (StringTraceData *) clientData;
+ StringTraceData *data = clientData;
Command *cmdPtr = (Command *) commandInfo;
const char **argv; /* Args to pass to string trace proc */
int i;
@@ -2249,7 +2284,7 @@ StringTraceProc(
* either command or argv.
*/
- (data->proc)(data->clientData, interp, level, (char *) command,
+ data->proc(data->clientData, interp, level, (char *) command,
cmdPtr->proc, cmdPtr->clientData, objc, argv);
TclStackFree(interp, (void *) argv);
@@ -2276,7 +2311,7 @@ static void
StringTraceDeleteProc(
ClientData clientData)
{
- ckfree((char *) clientData);
+ ckfree(clientData);
}
/*
@@ -2304,7 +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;
/*
@@ -2313,14 +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
@@ -2359,7 +2394,7 @@ Tcl_DeleteTrace(
*/
if (tracePtr->delProc != NULL) {
- (tracePtr->delProc)(tracePtr->clientData);
+ tracePtr->delProc(tracePtr->clientData);
}
/*
@@ -2392,8 +2427,7 @@ TclVarTraceExists(
Tcl_Interp *interp, /* The interpreter */
const char *varName) /* The variable name */
{
- Var *varPtr;
- Var *arrayPtr;
+ Var *varPtr, *arrayPtr;
/*
* The choice of "create" flag values is delicate here, and matches the
@@ -2413,7 +2447,7 @@ TclVarTraceExists(
if ((varPtr->flags & VAR_TRACED_READ)
|| (arrayPtr && (arrayPtr->flags & VAR_TRACED_READ))) {
- TclCallVarTraces((Interp *)interp, arrayPtr, varPtr, varName, NULL,
+ TclCallVarTraces((Interp *) interp, arrayPtr, varPtr, varName, NULL,
TCL_TRACE_READS, /* leaveErrMsg */ 0);
}
@@ -2472,7 +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);
@@ -2550,7 +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;
@@ -2576,25 +2610,25 @@ TclCallVarTraces(
result = NULL;
active.nextPtr = iPtr->activeVarTracePtr;
iPtr->activeVarTracePtr = &active;
- Tcl_Preserve((ClientData) iPtr);
+ Tcl_Preserve(iPtr);
if (arrayPtr && !TclIsVarTraceActive(arrayPtr)
&& (arrayPtr->flags & traceflags)) {
hPtr = Tcl_FindHashEntry(&iPtr->varTraces, (char *) arrayPtr);
active.varPtr = arrayPtr;
- for (tracePtr = (VarTrace *) Tcl_GetHashValue(hPtr);
- tracePtr != NULL; tracePtr = active.nextTracePtr) {
+ for (tracePtr = Tcl_GetHashValue(hPtr);
+ tracePtr != NULL; tracePtr = active.nextTracePtr) {
active.nextTracePtr = tracePtr->nextPtr;
if (!(tracePtr->flags & flags)) {
continue;
}
- Tcl_Preserve((ClientData) tracePtr);
+ Tcl_Preserve(tracePtr);
if (state == NULL) {
- state = Tcl_SaveInterpState((Tcl_Interp *)iPtr, code);
+ state = Tcl_SaveInterpState((Tcl_Interp *) iPtr, code);
}
- if (Tcl_InterpDeleted((Tcl_Interp *)iPtr)) {
+ if (Tcl_InterpDeleted((Tcl_Interp *) iPtr)) {
flags |= TCL_INTERP_DESTROYED;
}
- result = (*tracePtr->traceProc)(tracePtr->clientData,
+ result = tracePtr->traceProc(tracePtr->clientData,
(Tcl_Interp *) iPtr, part1, part2, flags);
if (result != NULL) {
if (flags & TCL_TRACE_UNSETS) {
@@ -2608,7 +2642,7 @@ TclCallVarTraces(
code = TCL_ERROR;
}
}
- Tcl_Release((ClientData) tracePtr);
+ Tcl_Release(tracePtr);
if (code == TCL_ERROR) {
goto done;
}
@@ -2625,20 +2659,20 @@ TclCallVarTraces(
active.varPtr = varPtr;
if (varPtr->flags & traceflags) {
hPtr = Tcl_FindHashEntry(&iPtr->varTraces, (char *) varPtr);
- for (tracePtr = (VarTrace *) Tcl_GetHashValue(hPtr);
- tracePtr != NULL; tracePtr = active.nextTracePtr) {
+ for (tracePtr = Tcl_GetHashValue(hPtr);
+ tracePtr != NULL; tracePtr = active.nextTracePtr) {
active.nextTracePtr = tracePtr->nextPtr;
if (!(tracePtr->flags & flags)) {
continue;
}
- Tcl_Preserve((ClientData) tracePtr);
+ Tcl_Preserve(tracePtr);
if (state == NULL) {
- state = Tcl_SaveInterpState((Tcl_Interp *)iPtr, code);
+ state = Tcl_SaveInterpState((Tcl_Interp *) iPtr, code);
}
- if (Tcl_InterpDeleted((Tcl_Interp *)iPtr)) {
+ if (Tcl_InterpDeleted((Tcl_Interp *) iPtr)) {
flags |= TCL_INTERP_DESTROYED;
}
- result = (*tracePtr->traceProc)(tracePtr->clientData,
+ result = tracePtr->traceProc(tracePtr->clientData,
(Tcl_Interp *) iPtr, part1, part2, flags);
if (result != NULL) {
if (flags & TCL_TRACE_UNSETS) {
@@ -2652,7 +2686,7 @@ TclCallVarTraces(
code = TCL_ERROR;
}
}
- Tcl_Release((ClientData) tracePtr);
+ Tcl_Release(tracePtr);
if (code == TCL_ERROR) {
goto done;
}
@@ -2688,7 +2722,8 @@ TclCallVarTraces(
if (disposeFlags & TCL_TRACE_RESULT_OBJECT) {
Tcl_SetObjResult((Tcl_Interp *)iPtr, (Tcl_Obj *) result);
} else {
- Tcl_SetResult((Tcl_Interp *)iPtr, result, TCL_STATIC);
+ Tcl_SetObjResult((Tcl_Interp *)iPtr,
+ Tcl_NewStringObj(result, -1));
}
Tcl_AddErrorInfo((Tcl_Interp *)iPtr, "");
@@ -2705,12 +2740,12 @@ TclCallVarTraces(
iPtr->flags &= ~(ERR_ALREADY_LOGGED);
Tcl_DiscardInterpState(state);
} else {
- (void) Tcl_RestoreInterpState((Tcl_Interp *)iPtr, state);
+ Tcl_RestoreInterpState((Tcl_Interp *) iPtr, state);
}
DisposeTraceResult(disposeFlags,result);
} else if (state) {
if (code == TCL_OK) {
- code = Tcl_RestoreInterpState((Tcl_Interp *)iPtr, state);
+ code = Tcl_RestoreInterpState((Tcl_Interp *) iPtr, state);
} else {
Tcl_DiscardInterpState(state);
}
@@ -2727,7 +2762,7 @@ TclCallVarTraces(
VarHashRefCount(varPtr)--;
}
iPtr->activeVarTracePtr = active.nextPtr;
- Tcl_Release((ClientData) iPtr);
+ Tcl_Release(iPtr);
return code;
}
@@ -2780,6 +2815,7 @@ DisposeTraceResult(
*----------------------------------------------------------------------
*/
+#undef Tcl_UntraceVar
void
Tcl_UntraceVar(
Tcl_Interp *interp, /* Interpreter containing variable. */
@@ -2858,9 +2894,8 @@ Tcl_UntraceVar2(
#endif
flags &= flagMask;
- hPtr = Tcl_FindHashEntry(&iPtr->varTraces,
- (char *) varPtr);
- for (tracePtr = (VarTrace *) Tcl_GetHashValue(hPtr), prevPtr = NULL; ;
+ hPtr = Tcl_FindHashEntry(&iPtr->varTraces, (char *) varPtr);
+ for (tracePtr = Tcl_GetHashValue(hPtr), prevPtr = NULL; ;
prevPtr = tracePtr, tracePtr = tracePtr->nextPtr) {
if (tracePtr == NULL) {
goto updateFlags;
@@ -2876,6 +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;
@@ -2895,7 +2940,7 @@ Tcl_UntraceVar2(
prevPtr->nextPtr = nextPtr;
}
tracePtr->nextPtr = NULL;
- Tcl_EventuallyFree((ClientData) tracePtr, TCL_DYNAMIC);
+ Tcl_EventuallyFree(tracePtr, TCL_DYNAMIC);
for (tracePtr = nextPtr; tracePtr != NULL;
tracePtr = tracePtr->nextPtr) {
@@ -2939,6 +2984,7 @@ Tcl_UntraceVar2(
*----------------------------------------------------------------------
*/
+#undef Tcl_VarTraceInfo
ClientData
Tcl_VarTraceInfo(
Tcl_Interp *interp, /* Interpreter containing variable. */
@@ -2989,7 +3035,6 @@ Tcl_VarTraceInfo2(
* call will return the first trace. */
{
Interp *iPtr = (Interp *) interp;
- register VarTrace *tracePtr;
Var *varPtr, *arrayPtr;
Tcl_HashEntry *hPtr;
@@ -3004,14 +3049,13 @@ Tcl_VarTraceInfo2(
* Find the relevant trace, if any, and return its clientData.
*/
- hPtr = Tcl_FindHashEntry(&iPtr->varTraces,
- (char *) varPtr);
+ hPtr = Tcl_FindHashEntry(&iPtr->varTraces, (char *) varPtr);
if (hPtr) {
- tracePtr = Tcl_GetHashValue(hPtr);
+ register VarTrace *tracePtr = Tcl_GetHashValue(hPtr);
if (prevClientData != NULL) {
- for ( ; tracePtr != NULL; tracePtr = tracePtr->nextPtr) {
+ for (; tracePtr != NULL; tracePtr = tracePtr->nextPtr) {
if ((tracePtr->clientData == prevClientData)
&& (tracePtr->traceProc == proc)) {
tracePtr = tracePtr->nextPtr;
@@ -3019,7 +3063,7 @@ Tcl_VarTraceInfo2(
}
}
}
- for (; tracePtr!=NULL ; tracePtr=tracePtr->nextPtr) {
+ for (; tracePtr != NULL ; tracePtr = tracePtr->nextPtr) {
if (tracePtr->traceProc == proc) {
return tracePtr->clientData;
}
@@ -3049,6 +3093,7 @@ Tcl_VarTraceInfo2(
*----------------------------------------------------------------------
*/
+#undef Tcl_TraceVar
int
Tcl_TraceVar(
Tcl_Interp *interp, /* Interpreter in which variable is to be
@@ -3106,7 +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;
@@ -3114,7 +3159,7 @@ Tcl_TraceVar2(
result = TraceVarEx(interp, part1, part2, tracePtr);
if (result != TCL_OK) {
- ckfree((char *) tracePtr);
+ ckfree(tracePtr);
}
return result;
}
@@ -3180,8 +3225,8 @@ TraceVarEx(
* because there should be no code path that ever sets both flags.
*/
- if ((tracePtr->flags&TCL_TRACE_RESULT_DYNAMIC)
- && (tracePtr->flags&TCL_TRACE_RESULT_OBJECT)) {
+ if ((tracePtr->flags & TCL_TRACE_RESULT_DYNAMIC)
+ && (tracePtr->flags & TCL_TRACE_RESULT_OBJECT)) {
Tcl_Panic("bad result flag combination");
}
@@ -3196,13 +3241,13 @@ 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 {
- tracePtr->nextPtr = (VarTrace *) Tcl_GetHashValue(hPtr);
+ tracePtr->nextPtr = Tcl_GetHashValue(hPtr);
}
- Tcl_SetHashValue(hPtr, (char *) tracePtr);
+ Tcl_SetHashValue(hPtr, tracePtr);
/*
* Mark the variable as traced so we know to call them.
generated by cgit v0.12 at 2025-10-31 20:29:26 (GMT)