Bug Summary

File:Create.c
Location:line 533, column 6
Description:Dereference of null pointer

Annotated Source Code

1/***********************************************************
2Copyright (c) 1993, Oracle and/or its affiliates. All rights reserved.
3
4Permission is hereby granted, free of charge, to any person obtaining a
5copy of this software and associated documentation files (the "Software"),
6to deal in the Software without restriction, including without limitation
7the rights to use, copy, modify, merge, publish, distribute, sublicense,
8and/or sell copies of the Software, and to permit persons to whom the
9Software is furnished to do so, subject to the following conditions:
10
11The above copyright notice and this permission notice (including the next
12paragraph) shall be included in all copies or substantial portions of the
13Software.
14
15THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
21DEALINGS IN THE SOFTWARE.
22
23Copyright 1987, 1988 by Digital Equipment Corporation, Maynard, Massachusetts.
24
25 All Rights Reserved
26
27Permission to use, copy, modify, and distribute this software and its
28documentation for any purpose and without fee is hereby granted,
29provided that the above copyright notice appear in all copies and that
30both that copyright notice and this permission notice appear in
31supporting documentation, and that the name of Digital not be
32used in advertising or publicity pertaining to distribution of the
33software without specific, written prior permission.
34
35DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
36ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
37DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
38ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
39WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
40ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
41SOFTWARE.
42
43******************************************************************/
44
45/*
46
47Copyright 1987, 1988, 1994, 1998 The Open Group
48
49Permission to use, copy, modify, distribute, and sell this software and its
50documentation for any purpose is hereby granted without fee, provided that
51the above copyright notice appear in all copies and that both that
52copyright notice and this permission notice appear in supporting
53documentation.
54
55The above copyright notice and this permission notice shall be included in
56all copies or substantial portions of the Software.
57
58THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
59IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
60FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
61OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
62AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
63CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
64
65Except as contained in this notice, the name of The Open Group shall not be
66used in advertising or otherwise to promote the sale, use or other dealings
67in this Software without prior written authorization from The Open Group.
68
69*/
70
71#ifdef HAVE_CONFIG_H1
72#include <config.h>
73#endif
74#include "IntrinsicI.h"
75#include "VarargsI.h"
76#include "ShellP.h"
77#include "CreateI.h"
78#ifndef X_NO_RESOURCE_CONFIGURATION_MANAGEMENT
79#include "ResConfigP.h"
80#endif
81#include <stdio.h>
82
83static String XtNxtCreateWidget = "xtCreateWidget";
84static String XtNxtCreatePopupShell = "xtCreatePopupShell";
85
86static void
87CallClassPartInit(WidgetClass ancestor, WidgetClass wc)
88{
89 if (ancestor->core_class.superclass != NULL((void*)0)) {
90 CallClassPartInit(ancestor->core_class.superclass, wc);
91 }
92 if (ancestor->core_class.class_part_initialize != NULL((void*)0)) {
93 (*(ancestor->core_class.class_part_initialize)) (wc);
94 }
95}
96
97void
98XtInitializeWidgetClass(WidgetClass wc)
99{
100 XtEnum inited;
101 LOCK_PROCESSif(_XtProcessLock)(*_XtProcessLock)();
102 if (wc->core_class.class_inited) {
103 UNLOCK_PROCESSif(_XtProcessUnlock)(*_XtProcessUnlock)();
104 return;
105 }
106 inited = 0x01;
107 {
108 WidgetClass pc;
109#define LeaveIfClass(c, d) if (pc == c) { inited = d; break; }
110 for (pc = wc; pc; pc = pc->core_class.superclass) {
111 LeaveIfClass(rectObjClass, 0x01 |
112 RectObjClassFlag0x02);
113 LeaveIfClass(coreWidgetClass, 0x01 |
114 RectObjClassFlag0x02 |
115 WidgetClassFlag0x04);
116 LeaveIfClass(compositeWidgetClass, 0x01 |
117 RectObjClassFlag0x02 |
118 WidgetClassFlag0x04 |
119 CompositeClassFlag0x08);
120 LeaveIfClass(constraintWidgetClass, 0x01 |
121 RectObjClassFlag0x02 |
122 WidgetClassFlag0x04 |
123 CompositeClassFlag0x08 |
124 ConstraintClassFlag0x10);
125 LeaveIfClass(shellWidgetClass, 0x01 |
126 RectObjClassFlag0x02 |
127 WidgetClassFlag0x04 |
128 CompositeClassFlag0x08 |
129 ShellClassFlag0x20);
130 LeaveIfClass(wmShellWidgetClass, 0x01 |
131 RectObjClassFlag0x02 |
132 WidgetClassFlag0x04 |
133 CompositeClassFlag0x08 |
134 ShellClassFlag0x20 |
135 WMShellClassFlag0x40);
136 LeaveIfClass(topLevelShellWidgetClass, 0x01 |
137 RectObjClassFlag0x02 |
138 WidgetClassFlag0x04 |
139 CompositeClassFlag0x08 |
140 ShellClassFlag0x20 |
141 WMShellClassFlag0x40 |
142 TopLevelClassFlag0x80);
143 }
144#undef LeaveIfClass
145 }
146 if (wc->core_class.version != XtVersion(11 * 1000 + 6) &&
147 wc->core_class.version != XtVersionDontCheck0) {
148 String param[3];
149 String mismatch = "Widget class %s version mismatch (recompilation needed):\n widget %d vs. intrinsics %d.";
150 String recompile = "Widget class %s must be re-compiled.";
151 Cardinal num_params;
152
153 param[0] = wc->core_class.class_name;
154 param[1] = (String) wc->core_class.version;
155 param[2] = (String) XtVersion(11 * 1000 + 6);
156
157 if (wc->core_class.version == (11 * 1000 + 5) || /* MIT X11R5 */
158 wc->core_class.version == (11 * 1000 + 4)) { /* MIT X11R4 */
159 if ((inited & WMShellClassFlag0x40) &&
160 (sizeof(Boolean) != sizeof(char) ||
161 sizeof(Atom) != sizeof(Widget) ||
162 sizeof(Atom) != sizeof(String))) {
163 num_params=3;
164 XtWarningMsg("versionMismatch","widget",XtCXtToolkitError,
165 mismatch, param, &num_params);
166 num_params=1;
167 XtErrorMsg("R4orR5versionMismatch","widget",XtCXtToolkitError,
168 recompile, param, &num_params);
169
170 }
171 }
172 else if (wc->core_class.version == (11 * 1000 + 3)) { /* MIT X11R3 */
173 if (inited & ShellClassFlag0x20) {
174 num_params=1;
175 XtWarningMsg("r3versionMismatch","widget",XtCXtToolkitError,
176 "Shell Widget class %s binary compiled for R3",
177 param,&num_params);
178 XtErrorMsg("R3versionMismatch","widget",XtCXtToolkitError,
179 recompile, param, &num_params);
180 }
181 }
182 else {
183 num_params=3;
184 XtWarningMsg("versionMismatch","widget",XtCXtToolkitError,
185 mismatch, param, &num_params);
186 if (wc->core_class.version == (2 * 1000 + 2)) /* MIT X11R2 */ {
187 num_params=1;
188 XtErrorMsg("r2versionMismatch","widget",XtCXtToolkitError,
189 recompile, param, &num_params);
190 }
191 }
192 }
193
194 if ((wc->core_class.superclass != NULL((void*)0))
195 && (!(wc->core_class.superclass->core_class.class_inited)))
196 XtInitializeWidgetClass(wc->core_class.superclass);
197
198 if (wc->core_class.class_initialize != NULL((void*)0))
199 (*(wc->core_class.class_initialize))();
200 CallClassPartInit(wc, wc);
201 wc->core_class.class_inited = inited;
202 UNLOCK_PROCESSif(_XtProcessUnlock)(*_XtProcessUnlock)();
203}
204
205static void
206CallInitialize (
207 WidgetClass class,
208 Widget req_widget,
209 Widget new_widget,
210 ArgList args,
211 Cardinal num_args)
212{
213 WidgetClass superclass;
214 XtInitProc initialize;
215 XtArgsProc initialize_hook;
216
217 LOCK_PROCESSif(_XtProcessLock)(*_XtProcessLock)();
218 superclass = class->core_class.superclass;
219 UNLOCK_PROCESSif(_XtProcessUnlock)(*_XtProcessUnlock)();
220 if (superclass)
221 CallInitialize (superclass, req_widget, new_widget, args, num_args);
222 LOCK_PROCESSif(_XtProcessLock)(*_XtProcessLock)();
223 initialize = class->core_class.initialize;
224 UNLOCK_PROCESSif(_XtProcessUnlock)(*_XtProcessUnlock)();
225 if (initialize)
226 (*initialize) (req_widget, new_widget, args, &num_args);
227 LOCK_PROCESSif(_XtProcessLock)(*_XtProcessLock)();
228 initialize_hook = class->core_class.initialize_hook;
229 UNLOCK_PROCESSif(_XtProcessUnlock)(*_XtProcessUnlock)();
230 if (initialize_hook)
231 (*initialize_hook) (new_widget, args, &num_args);
232}
233
234static void
235CallConstraintInitialize (
236 ConstraintWidgetClass class,
237 Widget req_widget,
238 Widget new_widget,
239 ArgList args,
240 Cardinal num_args)
241{
242 WidgetClass superclass;
243 XtInitProc initialize;
244
245 LOCK_PROCESSif(_XtProcessLock)(*_XtProcessLock)();
246 superclass = class->core_class.superclass;
247 UNLOCK_PROCESSif(_XtProcessUnlock)(*_XtProcessUnlock)();
248 if (superclass != constraintWidgetClass)
249 CallConstraintInitialize((ConstraintWidgetClass) superclass,
250 req_widget, new_widget, args, num_args);
251 LOCK_PROCESSif(_XtProcessLock)(*_XtProcessLock)();
252 initialize = class->constraint_class.initialize;
253 UNLOCK_PROCESSif(_XtProcessUnlock)(*_XtProcessUnlock)();
254 if (initialize)
255 (*initialize) (req_widget, new_widget, args, &num_args);
256}
257
258static Widget
259xtWidgetAlloc(
260 WidgetClass widget_class,
261 ConstraintWidgetClass parent_constraint_class,
262 Widget parent,
263 String name,
264 ArgList args, /* must be NULL if typed_args is non-NULL */
265 Cardinal num_args,
266 XtTypedArgList typed_args, /* must be NULL if args is non-NULL */
267 Cardinal num_typed_args)
268{
269 Widget widget;
270 Cardinal wsize, csize = 0;
271 ObjectClassExtension ext;
272
273 LOCK_PROCESSif(_XtProcessLock)(*_XtProcessLock)();
274 if (! (widget_class->core_class.class_inited))
275 XtInitializeWidgetClass(widget_class);
276 ext = (ObjectClassExtension)
277 XtGetClassExtension(widget_class,
278 XtOffsetOf(ObjectClassRec, object_class.extension)__builtin_offsetof(ObjectClassRec, object_class.extension),
279 NULLQUARK((XrmQuark) 0), XtObjectExtensionVersion1L,
280 sizeof(ObjectClassExtensionRec));
281 if (parent_constraint_class)
282 csize = parent_constraint_class->constraint_class.constraint_size;
283 if (ext && ext->allocate) {
284 XtAllocateProc allocate;
285 Cardinal extra = 0;
286 Cardinal nargs = num_args;
287 Cardinal ntyped = num_typed_args;
288 allocate = ext->allocate;
289 UNLOCK_PROCESSif(_XtProcessUnlock)(*_XtProcessUnlock)();
290 (*allocate)(widget_class, &csize, &extra, args, &nargs,
291 typed_args, &ntyped, &widget, NULL((void*)0));
292 } else {
293 wsize = widget_class->core_class.widget_size;
294 UNLOCK_PROCESSif(_XtProcessUnlock)(*_XtProcessUnlock)();
295 if (csize) {
296 if (sizeof(struct {char a; double b;}) !=
297 (sizeof(struct {char a; unsigned long b;}) -
298 sizeof(unsigned long) + sizeof(double))) {
299 if (csize && !(csize & (sizeof(double) - 1)))
300 wsize = (wsize + sizeof(double) - 1) & ~(sizeof(double)-1);
301 }
302 }
303 widget = (Widget) __XtMalloc((unsigned)(wsize + csize));
304 bzero(widget, wsize + csize)memset(widget,0,wsize + csize);
305 widget->core.constraints =
306 (csize ? (XtPointer)((char *)widget + wsize) : NULL((void*)0));
307 }
308 widget->core.self = widget;
309 widget->core.parent = parent;
310 widget->core.widget_class = widget_class;
311 widget->core.xrm_name = StringToName((name != NULL) ? name : "")XrmStringToQuark((name != ((void*)0)) ? name : "");
312 widget->core.being_destroyed =
313 (parent != NULL((void*)0) ? parent->core.being_destroyed : FALSE0);
314 return widget;
315}
316
317static void
318CompileCallbacks(
319 Widget widget)
320{
321 CallbackTable offsets;
322 InternalCallbackList* cl;
323 int i;
324
325 LOCK_PROCESSif(_XtProcessLock)(*_XtProcessLock)();
326 offsets = (CallbackTable)
327 widget->core.widget_class->core_class.callback_private;
328
329 for (i = (int)(long) *(offsets++); --i >= 0; offsets++) {
330 cl = (InternalCallbackList *)
331 ((char *) widget - (*offsets)->xrm_offset - 1);
332 if (*cl)
333 *cl = _XtCompileCallbackList((XtCallbackList) *cl);
334 }
335 UNLOCK_PROCESSif(_XtProcessUnlock)(*_XtProcessUnlock)();
336}
337
338static Widget
339xtCreate(
340 char *name,
341 char *class,
342 WidgetClass widget_class,
343 Widget parent,
344 Screen* default_screen, /* undefined when creating a nonwidget */
345 ArgList args, /* must be NULL if typed_args is non-NULL */
346 Cardinal num_args,
347 XtTypedArgList typed_args, /* must be NULL if args is non-NULL */
348 Cardinal num_typed_args,
349 ConstraintWidgetClass parent_constraint_class,
350 /* NULL if not a subclass of Constraint or if child is popup shell */
351 XtWidgetProc post_proc)
352{
353 /* need to use strictest alignment rules possible in next two decls. */
354 double widget_cache[100];
355 double constraint_cache[20];
356 Widget req_widget;
357 XtPointer req_constraints = NULL((void*)0);
358 Cardinal wsize, csize;
359 Widget widget;
360 XtCacheRef *cache_refs;
361 Cardinal i;
362 XtCreateHookDataRec call_data;
363
364 widget = xtWidgetAlloc(widget_class, parent_constraint_class, parent,
365 name, args, num_args, typed_args, num_typed_args);
366
367 if (XtIsRectObj(widget)(((Object)(widget))->object.widget_class->core_class.class_inited
& 0x02)) {
368 widget->core.managed = FALSE0;
369 }
370 if (XtIsWidget(widget)(((Object)(widget))->object.widget_class->core_class.class_inited
& 0x04)) {
371 widget->core.name = XrmNameToString(widget->core.xrm_name)XrmQuarkToString(widget->core.xrm_name);
372 widget->core.screen = default_screen;
373 widget->core.tm.translations = NULL((void*)0);
374 widget->core.window = (Window) 0;
375 widget->core.visible = TRUE1;
376 widget->core.popup_list = NULL((void*)0);
377 widget->core.num_popups = 0;
378 };
379 LOCK_PROCESSif(_XtProcessLock)(*_XtProcessLock)();
380 if (XtIsApplicationShell(widget)(_XtIsSubclassOf(widget, (WidgetClass)applicationShellWidgetClass
, (WidgetClass)topLevelShellWidgetClass, (XtEnum)0x80))) {
381 ApplicationShellWidget a = (ApplicationShellWidget) widget;
382 if (class != NULL((void*)0))
383 a->application.xrm_class = StringToClass(class)XrmStringToQuark(class);
384 else
385 a->application.xrm_class = widget_class->core_class.xrm_class;
386 a->application.class = XrmQuarkToString(a->application.xrm_class);
387 }
388 UNLOCK_PROCESSif(_XtProcessUnlock)(*_XtProcessUnlock)();
389
390 /* fetch resources */
391 cache_refs = _XtGetResources(widget, args, num_args,
392 typed_args, &num_typed_args);
393
394 /* Convert typed arg list to arg list */
395 if (typed_args != NULL((void*)0) && num_typed_args > 0) {
396 args = (ArgList)ALLOCATE_LOCAL(sizeof(Arg) * num_typed_args)__builtin_alloca ((int)(sizeof(Arg) * num_typed_args));
397 if (args == NULL((void*)0)) _XtAllocError(NULL((void*)0));
398 for (i = 0; i < num_typed_args; i++) {
399 args[i].name = typed_args[i].name;
400 args[i].value = typed_args[i].value;
401 }
402 num_args = num_typed_args;
403 }
404
405 CompileCallbacks(widget);
406
407 if (cache_refs != NULL((void*)0)) {
408 XtAddCallback(widget, XtNdestroyCallback((char*)&XtStrings[169]),
409 XtCallbackReleaseCacheRefList, (XtPointer)cache_refs );
410 }
411
412 wsize = widget_class->core_class.widget_size;
413 csize = 0;
414 req_widget = (Widget) XtStackAlloc(wsize, widget_cache)((wsize) <= sizeof(widget_cache) ? (XtPointer)(widget_cache
) : XtMalloc((unsigned)(wsize)));
415 (void) memmove ((char *) req_widget, (char *) widget, (int) wsize);
416 CallInitialize (XtClass(widget)((widget)->core.widget_class), req_widget, widget, args, num_args);
417 if (parent_constraint_class != NULL((void*)0)) {
418 csize = parent_constraint_class->constraint_class.constraint_size;
419 if (csize) {
420 req_constraints = XtStackAlloc(csize, constraint_cache)((csize) <= sizeof(constraint_cache) ? (XtPointer)(constraint_cache
) : XtMalloc((unsigned)(csize)));
421 (void) memmove((char*)req_constraints, widget->core.constraints,
422 (int)csize);
423 req_widget->core.constraints = req_constraints;
424 } else req_widget->core.constraints = NULL((void*)0);
425 CallConstraintInitialize(parent_constraint_class, req_widget, widget,
426 args, num_args);
427 if (csize) {
428 XtStackFree(req_constraints, constraint_cache){ if ((req_constraints) != ((XtPointer)(constraint_cache))) XtFree
(req_constraints); };
429 }
430 }
431 XtStackFree((XtPointer)req_widget, widget_cache){ if (((XtPointer)req_widget) != ((XtPointer)(widget_cache)))
XtFree((XtPointer)req_widget); };
432 if (post_proc != (XtWidgetProc) NULL((void*)0)) {
433 Widget hookobj;
434 (*post_proc)(widget);
435 hookobj = XtHooksOfDisplay((default_screen != (Screen*) NULL((void*)0)) ?
436 default_screen->display :
437 XtDisplayOfObject(parent)((((Object)(parent))->object.widget_class->core_class.class_inited
& 0x04) ? (parent)->core.screen->display : _XtIsHookObject
(parent) ? ((HookObject)(parent))->hooks.screen->display
: _XtWindowedAncestor(parent)->core.screen->display));
438 if (XtHasCallbacks(hookobj, XtNcreateHook((char*)&XtStrings[2050])) == XtCallbackHasSome) {
439
440 call_data.type = XtHcreate((char*)&XtStrings[2198]);
441 call_data.widget = widget;
442 call_data.args = args;
443 call_data.num_args = num_args;
444 XtCallCallbackList(hookobj,
445 ((HookObject)hookobj)->hooks.createhook_callbacks,
446 (XtPointer)&call_data);
447 }
448 }
449 if (typed_args != NULL((void*)0)) {
450 while (num_typed_args-- > 0) {
451
452 /* In GetResources we may have dynamically alloc'd store to hold */
453 /* a copy of a resource which was larger then sizeof(XtArgVal). */
454 /* We must free this store now in order to prevent a memory leak */
455 /* A typed arg that has a converted value in dynamic store has a */
456 /* negated size field. */
457
458 if (typed_args->type != NULL((void*)0) && typed_args->size < 0) {
459 XtFree((char*)typed_args->value);
460 typed_args->size = -(typed_args->size);
461 }
462 typed_args++;
463 }
464 DEALLOCATE_LOCAL((char*)args)do {} while(0);
465 }
466 return (widget);
467}
468
469static void
470widgetPostProc(Widget w)
471{
472 XtWidgetProc insert_child;
473 Widget parent = XtParent(w)((w)->core.parent);
474 String param = XtName(w);
475 Cardinal num_params = 1;
476
477 if (XtIsComposite(parent)(((Object)(parent))->object.widget_class->core_class.class_inited
& 0x08)) {
478 LOCK_PROCESSif(_XtProcessLock)(*_XtProcessLock)();
479 insert_child = ((CompositeWidgetClass) parent->core.widget_class)->
480 composite_class.insert_child;
481 UNLOCK_PROCESSif(_XtProcessUnlock)(*_XtProcessUnlock)();
482 } else {
483 return;
484 }
485 if (insert_child == NULL((void*)0)) {
486 XtAppErrorMsg(XtWidgetToApplicationContext(parent),
487 "nullProc","insertChild",XtCXtToolkitError,
488 "\"%s\" parent has NULL insert_child method",
489 &param, &num_params);
490 } else {
491 (*insert_child) (w);
492 }
493}
494
495Widget
496_XtCreateWidget(
497 String name,
498 WidgetClass widget_class,
499 Widget parent,
500 ArgList args,
501 Cardinal num_args,
502 XtTypedArgList typed_args,
503 Cardinal num_typed_args)
504{
505 register Widget widget;
506 ConstraintWidgetClass cwc;
507 Screen* default_screen;
508 XtEnum class_inited;
509 String params[3];
510 Cardinal num_params;
511
512 params[0] = name;
513 num_params = 1;
514
515 if (parent == NULL((void*)0)) {
1
Assuming 'parent' is equal to null
2
Taking true branch
516 XtErrorMsg("invalidParent", XtNxtCreateWidget, XtCXtToolkitError,
517 "XtCreateWidget \"%s\" requires non-NULL parent",
518 params, &num_params);
519 } else if (widget_class == NULL((void*)0)) {
520 XtAppErrorMsg(XtWidgetToApplicationContext(parent),
521 "invalidClass", XtNxtCreateWidget, XtCXtToolkitError,
522 "XtCreateWidget \"%s\" requires non-NULL widget class",
523 params, &num_params);
524 }
525 LOCK_PROCESSif(_XtProcessLock)(*_XtProcessLock)();
3
Within the expansion of the macro 'LOCK_PROCESS':
a
Assuming '_XtProcessLock' is null
526 if (!widget_class->core_class.class_inited)
4
Taking true branch
527 XtInitializeWidgetClass(widget_class);
528 class_inited = widget_class->core_class.class_inited;
529 UNLOCK_PROCESSif(_XtProcessUnlock)(*_XtProcessUnlock)();
5
Within the expansion of the macro 'UNLOCK_PROCESS':
a
Assuming '_XtProcessUnlock' is null
530 if ((class_inited & WidgetClassFlag0x04) == 0) {
6
Taking true branch
531 /* not a widget */
532 default_screen = NULL((void*)0);
533 if (XtIsComposite(parent)(((Object)(parent))->object.widget_class->core_class.class_inited
& 0x08)) {
7
Within the expansion of the macro 'XtIsComposite':
a
Dereference of null pointer
534 CompositeClassExtension ext;
535 ext = (CompositeClassExtension)
536 XtGetClassExtension(XtClass(parent)((parent)->core.widget_class),
537 XtOffsetOf(CompositeClassRec, composite_class.extension)__builtin_offsetof(CompositeClassRec, composite_class.extension
),
538 NULLQUARK((XrmQuark) 0), 1L, (Cardinal) 0);
539 LOCK_PROCESSif(_XtProcessLock)(*_XtProcessLock)();
540 if (ext &&
541 (ext->version > XtCompositeExtensionVersion2L ||
542 ext->record_size > sizeof(CompositeClassExtensionRec))) {
543 params[1] = XtClass(parent)((parent)->core.widget_class)->core_class.class_name;
544 num_params = 2;
545 XtAppWarningMsg(XtWidgetToApplicationContext(parent),
546 "invalidExtension", XtNxtCreateWidget,
547 XtCXtToolkitError,
548 "widget \"%s\" class %s has invalid CompositeClassExtension record",
549 params, &num_params);
550 }
551 if (!ext || !ext->accepts_objects) {
552 params[1] = XtName(parent);
553 num_params = 2;
554 XtAppErrorMsg(XtWidgetToApplicationContext(parent),
555 "nonWidget", XtNxtCreateWidget,XtCXtToolkitError,
556"attempt to add non-widget child \"%s\" to parent \"%s\" which supports only widgets",
557 params, &num_params);
558 }
559 UNLOCK_PROCESSif(_XtProcessUnlock)(*_XtProcessUnlock)();
560 }
561 } else {
562 default_screen = parent->core.screen;
563 }
564
565 if (XtIsConstraint(parent)(((Object)(parent))->object.widget_class->core_class.class_inited
& 0x10)) {
566 cwc = (ConstraintWidgetClass) parent->core.widget_class;
567 } else {
568 cwc = NULL((void*)0);
569 }
570 widget = xtCreate(name, (char *)NULL((void*)0), widget_class, parent,
571 default_screen, args, num_args,
572 typed_args, num_typed_args, cwc, widgetPostProc);
573 return (widget);
574}
575
576Widget
577XtCreateWidget(
578 _Xconstconst char* name,
579 WidgetClass widget_class,
580 Widget parent,
581 ArgList args,
582 Cardinal num_args
583 )
584{
585 Widget retval;
586 WIDGET_TO_APPCON(parent)XtAppContext app = (parent && _XtProcessLock ? XtWidgetToApplicationContext
(parent) : ((void*)0));
587
588 LOCK_APP(app)if(app && app->lock)(*app->lock)(app);
589 retval = _XtCreateWidget((String)name, widget_class, parent, args, num_args,
590 (XtTypedArgList)NULL((void*)0), (Cardinal)0);
591 UNLOCK_APP(app)if(app && app->unlock)(*app->unlock)(app);
592 return retval;
593}
594
595
596Widget
597XtCreateManagedWidget(
598 _Xconstconst char* name,
599 WidgetClass widget_class,
600 Widget parent,
601 ArgList args,
602 Cardinal num_args
603 )
604{
605 register Widget widget;
606 WIDGET_TO_APPCON(parent)XtAppContext app = (parent && _XtProcessLock ? XtWidgetToApplicationContext
(parent) : ((void*)0));
607
608 LOCK_APP(app)if(app && app->lock)(*app->lock)(app);
609 XtCheckSubclass(parent, compositeWidgetClass, "in XtCreateManagedWidget");
610 widget = _XtCreateWidget((String)name, widget_class, parent, args,
611 num_args, (XtTypedArgList)NULL((void*)0), (Cardinal) 0);
612 XtManageChild(widget);
613 UNLOCK_APP(app)if(app && app->unlock)(*app->unlock)(app);
614 return widget;
615}
616
617static void
618popupPostProc(Widget w)
619{
620 Widget parent = XtParent(w)((w)->core.parent);
621
622 parent->core.popup_list =
623 (WidgetList) XtRealloc((char*) parent->core.popup_list,
624 (unsigned) (parent->core.num_popups+1) * sizeof(Widget));
625 parent->core.popup_list[parent->core.num_popups++] = w;
626}
627
628Widget
629_XtCreatePopupShell(
630 String name,
631 WidgetClass widget_class,
632 Widget parent,
633 ArgList args,
634 Cardinal num_args,
635 XtTypedArgList typed_args,
636 Cardinal num_typed_args)
637{
638 register Widget widget;
639 Screen* default_screen;
640
641 if (parent == NULL((void*)0)) {
642 XtErrorMsg("invalidParent",XtNxtCreatePopupShell,XtCXtToolkitError,
643 "XtCreatePopupShell requires non-NULL parent",
644 (String *)NULL((void*)0), (Cardinal *)NULL((void*)0));
645 } else if (widget_class == NULL((void*)0)) {
646 XtAppErrorMsg(XtWidgetToApplicationContext(parent),
647 "invalidClass",XtNxtCreatePopupShell,XtCXtToolkitError,
648 "XtCreatePopupShell requires non-NULL widget class",
649 (String *)NULL((void*)0), (Cardinal *)NULL((void*)0));
650 }
651 XtCheckSubclass(parent, coreWidgetClass, "in XtCreatePopupShell");
652 default_screen = parent->core.screen;
653 widget = xtCreate(name, (char *)NULL((void*)0), widget_class, parent,
654 default_screen, args, num_args, typed_args,
655 num_typed_args, (ConstraintWidgetClass)NULL((void*)0),
656 popupPostProc);
657
658#ifndef X_NO_RESOURCE_CONFIGURATION_MANAGEMENT
659 XtAddEventHandler (widget, (EventMask) PropertyChangeMask(1L<<22), FALSE0,
660 (XtEventHandler) _XtResourceConfigurationEH, NULL((void*)0));
661#endif
662 return(widget);
663}
664
665Widget
666XtCreatePopupShell(
667 _Xconstconst char* name,
668 WidgetClass widget_class,
669 Widget parent,
670 ArgList args,
671 Cardinal num_args
672 )
673{
674 Widget retval;
675 WIDGET_TO_APPCON(parent)XtAppContext app = (parent && _XtProcessLock ? XtWidgetToApplicationContext
(parent) : ((void*)0));
676
677 LOCK_APP(app)if(app && app->lock)(*app->lock)(app);
678 retval = _XtCreatePopupShell((String)name, widget_class, parent, args,
679 num_args, (XtTypedArgList)NULL((void*)0), (Cardinal)0);
680 UNLOCK_APP(app)if(app && app->unlock)(*app->unlock)(app);
681 return retval;
682}
683
684Widget
685_XtAppCreateShell(
686 String name,
687 String class,
688 WidgetClass widget_class,
689 Display* display,
690 ArgList args,
691 Cardinal num_args,
692 XtTypedArgList typed_args,
693 Cardinal num_typed_args)
694{
695 Widget shell;
696
697 if (widget_class == NULL((void*)0)) {
698 XtAppErrorMsg(XtDisplayToApplicationContext(display),
699 "invalidClass","xtAppCreateShell",XtCXtToolkitError,
700 "XtAppCreateShell requires non-NULL widget class",
701 (String *)NULL((void*)0), (Cardinal *)NULL((void*)0));
702 }
703 if (name == NULL((void*)0))
704 name = XrmNameToString(_XtGetPerDisplay(display)->name)XrmQuarkToString(_XtGetPerDisplay(display)->name);
705 shell = xtCreate(name, class, widget_class, (Widget)NULL((void*)0),
706 (Screen*)DefaultScreenOfDisplay(display)(&((_XPrivDisplay)display)->screens[(((_XPrivDisplay)display
)->default_screen)]),
707 args, num_args, typed_args, num_typed_args,
708 (ConstraintWidgetClass) NULL((void*)0), _XtAddShellToHookObj);
709
710#ifndef X_NO_RESOURCE_CONFIGURATION_MANAGEMENT
711 XtAddEventHandler (shell, (EventMask) PropertyChangeMask(1L<<22), FALSE0,
712 (XtEventHandler) _XtResourceConfigurationEH, NULL((void*)0));
713#endif
714
715 return shell;
716}
717
718Widget
719XtAppCreateShell(
720 _Xconstconst char* name,
721 _Xconstconst char* class,
722 WidgetClass widget_class,
723 Display *display,
724 ArgList args,
725 Cardinal num_args
726 )
727{
728 Widget retval;
729 DPY_TO_APPCON(display)XtAppContext app = (_XtProcessLock ? XtDisplayToApplicationContext
(display): ((void*)0));
730
731 LOCK_APP(app)if(app && app->lock)(*app->lock)(app);
732 retval = _XtAppCreateShell((String)name, (String)class, widget_class,
733 display, args, num_args, (XtTypedArgList)NULL((void*)0), (Cardinal)0);
734 UNLOCK_APP(app)if(app && app->unlock)(*app->unlock)(app);
735 return retval;
736}
737
738/* ARGSUSED */
739Widget
740XtCreateApplicationShell(
741 _Xconstconst char* name, /* unused in R3 and later */
742 WidgetClass widget_class,
743 ArgList args,
744 Cardinal num_args
745 )
746{
747 Widget retval;
748 Display* dpy;
749 XrmClass class;
750 XtAppContext app = _XtDefaultAppContext();
751
752 LOCK_APP(app)if(app && app->lock)(*app->lock)(app);
753 dpy = app->list[0];
754 class = _XtGetPerDisplay(dpy)->class;
755
756 retval = _XtAppCreateShell((String)NULL((void*)0), XrmQuarkToString((XrmQuark)class),
757 widget_class, dpy, args, num_args,
758 (XtTypedArgList)NULL((void*)0), (Cardinal)0);
759 UNLOCK_APP(app)if(app && app->unlock)(*app->unlock)(app);
760 return retval;
761}
762
763Widget
764_XtCreateHookObj(Screen* screen)
765{
766 Widget req_widget;
767 double widget_cache[100];
768 Cardinal wsize = 0;
769 Widget hookobj = xtWidgetAlloc(hookObjectClass,
770 (ConstraintWidgetClass)NULL((void*)0),
771 (Widget)NULL((void*)0), "hooks",
772 (ArgList)NULL((void*)0), (Cardinal)0,
773 (XtTypedArgList)NULL((void*)0), (Cardinal)0);
774
775 ((HookObject)hookobj)->hooks.screen = screen;
776 (void) _XtGetResources(hookobj, (ArgList)NULL((void*)0), 0,
777 (XtTypedArgList)NULL((void*)0), &wsize);
778 CompileCallbacks(hookobj);
779 wsize = hookObjectClass->core_class.widget_size;
780 req_widget = (Widget) XtStackAlloc(wsize, widget_cache)((wsize) <= sizeof(widget_cache) ? (XtPointer)(widget_cache
) : XtMalloc((unsigned)(wsize)));
781 (void) memmove ((char *) req_widget, (char *) hookobj, (int) wsize);
782 CallInitialize (hookObjectClass, req_widget, hookobj,
783 (ArgList)NULL((void*)0), (Cardinal) 0);
784 XtStackFree((XtPointer)req_widget, widget_cache){ if (((XtPointer)req_widget) != ((XtPointer)(widget_cache)))
XtFree((XtPointer)req_widget); };
785 return hookobj;
786}