Bug Summary

File:cdk/broadway/cdkdevice-broadway.c
Warning:line 358, column 3
Undefined or garbage value returned to caller

Annotated Source Code

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clang -cc1 -cc1 -triple x86_64-pc-linux-gnu -analyze -disable-free -clear-ast-before-backend -disable-llvm-verifier -discard-value-names -main-file-name cdkdevice-broadway.c -analyzer-checker=core -analyzer-checker=apiModeling -analyzer-checker=unix -analyzer-checker=deadcode -analyzer-checker=security.insecureAPI.UncheckedReturn -analyzer-checker=security.insecureAPI.getpw -analyzer-checker=security.insecureAPI.gets -analyzer-checker=security.insecureAPI.mktemp -analyzer-checker=security.insecureAPI.mkstemp -analyzer-checker=security.insecureAPI.vfork -analyzer-checker=nullability.NullPassedToNonnull -analyzer-checker=nullability.NullReturnedFromNonnull -analyzer-output plist -w -setup-static-analyzer -mrelocation-model pic -pic-level 2 -fhalf-no-semantic-interposition -mframe-pointer=all -fmath-errno -ffp-contract=on -fno-rounding-math -mconstructor-aliases -funwind-tables=2 -target-cpu x86-64 -tune-cpu generic -debugger-tuning=gdb -fdebug-compilation-dir=/rootdir/cdk/broadway -fcoverage-compilation-dir=/rootdir/cdk/broadway -resource-dir /usr/lib/llvm-19/lib/clang/19 -D HAVE_CONFIG_H -I . -I ../.. -D G_LOG_DOMAIN="Cdk" -D G_LOG_USE_STRUCTURED=1 -D CDK_COMPILATION -D CDK_DISABLE_DEPRECATION_WARNINGS -I ../.. -I ../../cdk -I ../../cdk -D G_ENABLE_DEBUG -D G_ENABLE_CONSISTENCY_CHECKS -D GLIB_MIN_REQUIRED_VERSION=GLIB_VERSION_2_66 -D GLIB_MAX_ALLOWED_VERSION=GLIB_VERSION_2_66 -I /usr/include/pango-1.0 -I /usr/include/glib-2.0 -I /usr/lib/x86_64-linux-gnu/glib-2.0/include -I /usr/include/sysprof-6 -I /usr/include/harfbuzz -I /usr/include/freetype2 -I /usr/include/libpng16 -I /usr/include/libmount -I /usr/include/blkid -I /usr/include/fribidi -I /usr/include/cairo -I /usr/include/pixman-1 -I /usr/include/gdk-pixbuf-2.0 -I /usr/include/x86_64-linux-gnu -I /usr/include/webp -I /usr/include/gio-unix-2.0 -D PIC -internal-isystem /usr/lib/llvm-19/lib/clang/19/include -internal-isystem /usr/local/include -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/15/../../../../x86_64-linux-gnu/include -internal-externc-isystem /usr/include/x86_64-linux-gnu -internal-externc-isystem /include -internal-externc-isystem /usr/include -ferror-limit 19 -fvisibility=hidden -fgnuc-version=4.2.1 -fskip-odr-check-in-gmf -analyzer-checker deadcode.DeadStores -analyzer-checker alpha.deadcode.UnreachableCode -analyzer-checker alpha.core.CastSize -analyzer-checker alpha.core.CastToStruct -analyzer-checker alpha.core.IdenticalExpr -analyzer-checker alpha.security.ArrayBoundV2 -analyzer-checker alpha.security.MallocOverflow -analyzer-checker alpha.security.ReturnPtrRange -analyzer-checker alpha.unix.SimpleStream -analyzer-checker alpha.unix.cstring.BufferOverlap -analyzer-checker alpha.unix.cstring.NotNullTerminated -analyzer-checker alpha.unix.cstring.OutOfBounds -analyzer-checker alpha.core.FixedAddr -analyzer-output=html -faddrsig -D__GCC_HAVE_DWARF2_CFI_ASM=1 -o /rootdir/html-report/2025-10-29-215236-44096-1 -x c cdkdevice-broadway.c
1/* CDK - The GIMP Drawing Kit
2 * Copyright (C) 2009 Carlos Garnacho <carlosg@gnome.org>
3 *
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
8 *
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
13 *
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with this library. If not, see <http://www.gnu.org/licenses/>.
16 */
17
18#include "config.h"
19#include <stdlib.h>
20
21#include "cdkdevice-broadway.h"
22
23#include "cdkwindow.h"
24#include "cdkprivate-broadway.h"
25
26static gboolean cdk_broadway_device_get_history (CdkDevice *device,
27 CdkWindow *window,
28 guint32 start,
29 guint32 stop,
30 CdkTimeCoord ***events,
31 gint *n_events);
32static void cdk_broadway_device_get_state (CdkDevice *device,
33 CdkWindow *window,
34 gdouble *axes,
35 CdkModifierType *mask);
36static void cdk_broadway_device_set_window_cursor (CdkDevice *device,
37 CdkWindow *window,
38 CdkCursor *cursor);
39static void cdk_broadway_device_warp (CdkDevice *device,
40 CdkScreen *screen,
41 gdouble x,
42 gdouble y);
43static void cdk_broadway_device_query_state (CdkDevice *device,
44 CdkWindow *window,
45 CdkWindow **root_window,
46 CdkWindow **child_window,
47 gdouble *root_x,
48 gdouble *root_y,
49 gdouble *win_x,
50 gdouble *win_y,
51 CdkModifierType *mask);
52static CdkGrabStatus cdk_broadway_device_grab (CdkDevice *device,
53 CdkWindow *window,
54 gboolean owner_events,
55 CdkEventMask event_mask,
56 CdkWindow *confine_to,
57 CdkCursor *cursor,
58 guint32 time_);
59static void cdk_broadway_device_ungrab (CdkDevice *device,
60 guint32 time_);
61static CdkWindow * cdk_broadway_device_window_at_position (CdkDevice *device,
62 gdouble *win_x,
63 gdouble *win_y,
64 CdkModifierType *mask,
65 gboolean get_toplevel);
66static void cdk_broadway_device_select_window_events (CdkDevice *device,
67 CdkWindow *window,
68 CdkEventMask event_mask);
69
70
71G_DEFINE_TYPE (CdkBroadwayDevice, cdk_broadway_device, CDK_TYPE_DEVICE)static void cdk_broadway_device_init (CdkBroadwayDevice *self
); static void cdk_broadway_device_class_init (CdkBroadwayDeviceClass
*klass); static GType cdk_broadway_device_get_type_once (void
); static gpointer cdk_broadway_device_parent_class = ((void*
)0); static gint CdkBroadwayDevice_private_offset; static void
cdk_broadway_device_class_intern_init (gpointer klass) { cdk_broadway_device_parent_class
= g_type_class_peek_parent (klass); if (CdkBroadwayDevice_private_offset
!= 0) g_type_class_adjust_private_offset (klass, &CdkBroadwayDevice_private_offset
); cdk_broadway_device_class_init ((CdkBroadwayDeviceClass*) klass
); } __attribute__ ((__unused__)) static inline gpointer cdk_broadway_device_get_instance_private
(CdkBroadwayDevice *self) { return (((gpointer) ((guint8*) (
self) + (glong) (CdkBroadwayDevice_private_offset)))); } GType
cdk_broadway_device_get_type (void) { static GType static_g_define_type_id
= 0; if ((__extension__ ({ _Static_assert (sizeof *(&static_g_define_type_id
) == sizeof (gpointer), "Expression evaluates to false"); (void
) (0 ? (gpointer) * (&static_g_define_type_id) : ((void*)
0)); (!(__extension__ ({ _Static_assert (sizeof *(&static_g_define_type_id
) == sizeof (gpointer), "Expression evaluates to false"); __typeof__
(*(&static_g_define_type_id)) gapg_temp_newval; __typeof__
((&static_g_define_type_id)) gapg_temp_atomic = (&static_g_define_type_id
); __atomic_load (gapg_temp_atomic, &gapg_temp_newval, 5)
; gapg_temp_newval; })) && g_once_init_enter_pointer (
&static_g_define_type_id)); })) ) { GType g_define_type_id
= cdk_broadway_device_get_type_once (); (__extension__ ({ _Static_assert
(sizeof *(&static_g_define_type_id) == sizeof (gpointer)
, "Expression evaluates to false"); 0 ? (void) (*(&static_g_define_type_id
) = (g_define_type_id)) : (void) 0; g_once_init_leave_pointer
((&static_g_define_type_id), (gpointer) (guintptr) (g_define_type_id
)); })) ; } return static_g_define_type_id; } __attribute__ (
(__noinline__)) static GType cdk_broadway_device_get_type_once
(void) { GType g_define_type_id = g_type_register_static_simple
((cdk_device_get_type ()), g_intern_static_string ("CdkBroadwayDevice"
), sizeof (CdkBroadwayDeviceClass), (GClassInitFunc)(void (*)
(void)) cdk_broadway_device_class_intern_init, sizeof (CdkBroadwayDevice
), (GInstanceInitFunc)(void (*)(void)) cdk_broadway_device_init
, (GTypeFlags) 0); { {{};} } return g_define_type_id; }
72
73static void
74cdk_broadway_device_class_init (CdkBroadwayDeviceClass *klass)
75{
76 CdkDeviceClass *device_class = CDK_DEVICE_CLASS (klass)((((CdkDeviceClass*) (void *) g_type_check_class_cast ((GTypeClass
*) ((klass)), ((cdk_device_get_type ()))))));
77
78 device_class->get_history = cdk_broadway_device_get_history;
79 device_class->get_state = cdk_broadway_device_get_state;
80 device_class->set_window_cursor = cdk_broadway_device_set_window_cursor;
81 device_class->warp = cdk_broadway_device_warp;
82 device_class->query_state = cdk_broadway_device_query_state;
83 device_class->grab = cdk_broadway_device_grab;
84 device_class->ungrab = cdk_broadway_device_ungrab;
85 device_class->window_at_position = cdk_broadway_device_window_at_position;
86 device_class->select_window_events = cdk_broadway_device_select_window_events;
87}
88
89static void
90cdk_broadway_device_init (CdkBroadwayDevice *device_core)
91{
92 CdkDevice *device;
93
94 device = CDK_DEVICE (device_core)((((CdkDevice*) (void *) g_type_check_instance_cast ((GTypeInstance
*) ((device_core)), ((cdk_device_get_type ()))))));
95
96 _cdk_device_add_axis (device, CDK_NONE((CdkAtom)((gpointer) (gulong) (0))), CDK_AXIS_X, 0, 0, 1);
97 _cdk_device_add_axis (device, CDK_NONE((CdkAtom)((gpointer) (gulong) (0))), CDK_AXIS_Y, 0, 0, 1);
98}
99
100static gboolean
101cdk_broadway_device_get_history (CdkDevice *device G_GNUC_UNUSED__attribute__ ((__unused__)),
102 CdkWindow *window G_GNUC_UNUSED__attribute__ ((__unused__)),
103 guint32 start G_GNUC_UNUSED__attribute__ ((__unused__)),
104 guint32 stop G_GNUC_UNUSED__attribute__ ((__unused__)),
105 CdkTimeCoord ***events G_GNUC_UNUSED__attribute__ ((__unused__)),
106 gint *n_events G_GNUC_UNUSED__attribute__ ((__unused__)))
107{
108 return FALSE(0);
109}
110
111static void
112cdk_broadway_device_get_state (CdkDevice *device,
113 CdkWindow *window,
114 gdouble *axes,
115 CdkModifierType *mask)
116{
117 gdouble x, y;
118
119 cdk_window_get_device_position_double (window, device, &x, &y, mask);
120
121 if (axes)
122 {
123 axes[0] = x;
124 axes[1] = y;
125 }
126}
127
128static void
129cdk_broadway_device_set_window_cursor (CdkDevice *device G_GNUC_UNUSED__attribute__ ((__unused__)),
130 CdkWindow *window G_GNUC_UNUSED__attribute__ ((__unused__)),
131 CdkCursor *cursor G_GNUC_UNUSED__attribute__ ((__unused__)))
132{
133}
134
135static void
136cdk_broadway_device_warp (CdkDevice *device G_GNUC_UNUSED__attribute__ ((__unused__)),
137 CdkScreen *screen G_GNUC_UNUSED__attribute__ ((__unused__)),
138 gdouble x G_GNUC_UNUSED__attribute__ ((__unused__)),
139 gdouble y G_GNUC_UNUSED__attribute__ ((__unused__)))
140{
141}
142
143static void
144cdk_broadway_device_query_state (CdkDevice *device,
145 CdkWindow *window,
146 CdkWindow **root_window,
147 CdkWindow **child_window,
148 gdouble *root_x,
149 gdouble *root_y,
150 gdouble *win_x,
151 gdouble *win_y,
152 CdkModifierType *mask)
153{
154 CdkWindow *toplevel;
155 CdkWindowImplBroadway *impl;
156 CdkDisplay *display;
157 CdkBroadwayDisplay *broadway_display;
158 gint32 device_root_x, device_root_y;
159 guint32 mouse_toplevel_id;
160 CdkWindow *mouse_toplevel;
161 guint32 mask32;
162
163 if (cdk_device_get_source (device) != CDK_SOURCE_MOUSE)
3
←
Assuming the condition is true
→
4
←
Taking true branch
→
164 return;
5
←
Returning without writing to '*child_window'
→
165
166 display = cdk_device_get_display (device);
167 broadway_display = CDK_BROADWAY_DISPLAY (display)((((CdkBroadwayDisplay*) (void *) g_type_check_instance_cast (
(GTypeInstance*) ((display)), ((cdk_broadway_display_get_type
()))))));
168
169 impl = CDK_WINDOW_IMPL_BROADWAY (window->impl)((((CdkWindowImplBroadway*) (void *) g_type_check_instance_cast
((GTypeInstance*) ((window->impl)), ((cdk_window_impl_broadway_get_type
()))))));
170 toplevel = impl->wrapper;
171
172 if (root_window)
173 {
174 CdkScreen *screen;
175
176 screen = cdk_window_get_screen (window);
177 *root_window = cdk_screen_get_root_window (screen);
178 }
179
180 _cdk_broadway_server_query_mouse (broadway_display->server,
181 &mouse_toplevel_id,
182 &device_root_x,
183 &device_root_y,
184 &mask32);
185 mouse_toplevel = g_hash_table_lookup (broadway_display->id_ht, GUINT_TO_POINTER (mouse_toplevel_id)((gpointer) (gulong) (mouse_toplevel_id)));
186
187 if (root_x)
188 *root_x = device_root_x;
189 if (root_y)
190 *root_y = device_root_y;
191 if (win_x)
192 *win_x = device_root_x - toplevel->x;
193 if (win_y)
194 *win_y = device_root_y - toplevel->y;
195 if (mask)
196 *mask = mask32;
197 if (child_window)
198 {
199 if (cdk_window_get_window_type (toplevel) == CDK_WINDOW_ROOT)
200 {
201 *child_window = mouse_toplevel;
202 if (*child_window == NULL((void*)0))
203 *child_window = toplevel;
204 }
205 else
206 {
207 /* No native children */
208 *child_window = toplevel;
209 }
210 }
211
212 return;
213}
214
215void
216_cdk_broadway_window_grab_check_unmap (CdkWindow *window,
217 gulong serial)
218{
219 CdkDisplay *display = cdk_window_get_display (window);
220 CdkDeviceManager *device_manager;
221 GList *devices, *d;
222
223 G_GNUC_BEGIN_IGNORE_DEPRECATIONSclang diagnostic push clang diagnostic ignored "-Wdeprecated-declarations"
;
224 device_manager = cdk_display_get_device_manager (display);
225
226 /* Get all devices */
227 devices = cdk_device_manager_list_devices (device_manager, CDK_DEVICE_TYPE_MASTER);
228 devices = g_list_concat (devices, cdk_device_manager_list_devices (device_manager, CDK_DEVICE_TYPE_SLAVE));
229 devices = g_list_concat (devices, cdk_device_manager_list_devices (device_manager, CDK_DEVICE_TYPE_FLOATING));
230 G_GNUC_END_IGNORE_DEPRECATIONSclang diagnostic pop ;
231
232 /* End all grabs on the newly hidden window */
233 for (d = devices; d; d = d->next)
234 _cdk_display_end_device_grab (display, d->data, serial, window, TRUE(!(0)));
235
236 g_list_free (devices);
237}
238
239
240void
241_cdk_broadway_window_grab_check_destroy (CdkWindow *window)
242{
243 CdkDisplay *display = cdk_window_get_display (window);
244 CdkDeviceManager *device_manager;
245 CdkDeviceGrabInfo *grab;
246 GList *devices, *d;
247
248 G_GNUC_BEGIN_IGNORE_DEPRECATIONSclang diagnostic push clang diagnostic ignored "-Wdeprecated-declarations"
;
249 device_manager = cdk_display_get_device_manager (display);
250
251 /* Get all devices */
252 devices = cdk_device_manager_list_devices (device_manager, CDK_DEVICE_TYPE_MASTER);
253 G_GNUC_END_IGNORE_DEPRECATIONSclang diagnostic pop ;
254
255 for (d = devices; d; d = d->next)
256 {
257 /* Make sure there is no lasting grab in this native window */
258 grab = _cdk_display_get_last_device_grab (display, d->data);
259
260 if (grab && grab->native_window == window)
261 {
262 grab->serial_end = grab->serial_start;
263 grab->implicit_ungrab = TRUE(!(0));
264 }
265
266 }
267
268 g_list_free (devices);
269}
270
271
272static CdkGrabStatus
273cdk_broadway_device_grab (CdkDevice *device,
274 CdkWindow *window,
275 gboolean owner_events,
276 CdkEventMask event_mask,
277 CdkWindow *confine_to G_GNUC_UNUSED__attribute__ ((__unused__)),
278 CdkCursor *cursor G_GNUC_UNUSED__attribute__ ((__unused__)),
279 guint32 time_)
280{
281 CdkDisplay *display;
282 CdkBroadwayDisplay *broadway_display;
283
284 display = cdk_device_get_display (device);
285 broadway_display = CDK_BROADWAY_DISPLAY (display)((((CdkBroadwayDisplay*) (void *) g_type_check_instance_cast (
(GTypeInstance*) ((display)), ((cdk_broadway_display_get_type
()))))));
286
287 if (cdk_device_get_source (device) == CDK_SOURCE_KEYBOARD)
288 {
289 /* Device is a keyboard */
290 return CDK_GRAB_SUCCESS;
291 }
292 else
293 {
294 /* Device is a pointer */
295 return _cdk_broadway_server_grab_pointer (broadway_display->server,
296 CDK_WINDOW_IMPL_BROADWAY (window->impl)((((CdkWindowImplBroadway*) (void *) g_type_check_instance_cast
((GTypeInstance*) ((window->impl)), ((cdk_window_impl_broadway_get_type
()))))))->id,
297 owner_events,
298 event_mask,
299 time_);
300 }
301}
302
303#define TIME_IS_LATER(time1, time2)( (( time1 > time2 ) && ( time1 - time2 < ((guint32
)-1)/2 )) || (( time1 < time2 ) && ( time2 - time1
> ((guint32)-1)/2 )) ) \
304 ( (( time1 > time2 ) && ( time1 - time2 < ((guint32)-1)/2 )) || \
305 (( time1 < time2 ) && ( time2 - time1 > ((guint32)-1)/2 )) \
306 )
307
308static void
309cdk_broadway_device_ungrab (CdkDevice *device,
310 guint32 time_)
311{
312 CdkDisplay *display;
313 CdkBroadwayDisplay *broadway_display;
314 guint32 serial;
315
316 display = cdk_device_get_display (device);
317 broadway_display = CDK_BROADWAY_DISPLAY (display)((((CdkBroadwayDisplay*) (void *) g_type_check_instance_cast (
(GTypeInstance*) ((display)), ((cdk_broadway_display_get_type
()))))));
318
319 if (cdk_device_get_source (device) == CDK_SOURCE_KEYBOARD)
320 {
321 /* Device is a keyboard */
322 }
323 else
324 {
325 /* Device is a pointer */
326 serial = _cdk_broadway_server_ungrab_pointer (broadway_display->server, time_);
327
328 if (serial != 0)
329 {
330 CdkDeviceGrabInfo *grab;
331
332 grab = _cdk_display_get_last_device_grab (display, device);
333 if (grab &&
334 (time_ == CDK_CURRENT_TIME0L ||
335 grab->time == CDK_CURRENT_TIME0L ||
336 !TIME_IS_LATER (grab->time, time_)( (( grab->time > time_ ) && ( grab->time - time_
< ((guint32)-1)/2 )) || (( grab->time < time_ ) &&
( time_ - grab->time > ((guint32)-1)/2 )) )))
337 grab->serial_end = serial;
338 }
339 }
340}
341
342static CdkWindow *
343cdk_broadway_device_window_at_position (CdkDevice *device,
344 gdouble *win_x,
345 gdouble *win_y,
346 CdkModifierType *mask,
347 gboolean get_toplevel G_GNUC_UNUSED__attribute__ ((__unused__)))
348{
349 CdkScreen *screen;
350 CdkWindow *root_window;
351 CdkWindow *window;
1
'window' declared without an initial value
→
352
353 screen = cdk_display_get_default_screen (cdk_device_get_display (device));
354 root_window = cdk_screen_get_root_window (screen);
355
356 cdk_broadway_device_query_state (device, root_window, NULL((void*)0), &window, NULL((void*)0), NULL((void*)0), win_x, win_y, mask);
2
←
Calling 'cdk_broadway_device_query_state'
→
6
←
Returning from 'cdk_broadway_device_query_state'
→
357
358 return window;
7
←
Undefined or garbage value returned to caller
359}
360
361static void
362cdk_broadway_device_select_window_events (CdkDevice *device G_GNUC_UNUSED__attribute__ ((__unused__)),
363 CdkWindow *window G_GNUC_UNUSED__attribute__ ((__unused__)),
364 CdkEventMask event_mask G_GNUC_UNUSED__attribute__ ((__unused__)))
365{
366}