Bug Summary

File:proplist.c
Warning:line 172, column 41
This statement is never executed

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 proplist.c -analyzer-store=region -analyzer-opt-analyze-nested-blocks -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 -relaxed-aliasing -menable-no-infs -menable-no-nans -fapprox-func -menable-unsafe-fp-math -fno-signed-zeros -mreassociate -freciprocal-math -fdenormal-fp-math=preserve-sign,preserve-sign -ffp-contract=fast -fno-rounding-math -ffast-math -ffinite-math-only -mconstructor-aliases -funwind-tables=2 -target-cpu x86-64 -tune-cpu generic -debugger-tuning=gdb -ffunction-sections -fdata-sections -fcoverage-compilation-dir=/rootdir/src -resource-dir /usr/lib/llvm-14/lib/clang/14.0.6 -D HAVE_CONFIG_H -I . -I .. -D KA_PLUGIN_PATH="/usr/local/lib/libkanberra-0.31" -D KA_MACHINE_ID="/usr/local/var/lib/dbus/machine-id" -D PIC -internal-isystem /usr/lib/llvm-14/lib/clang/14.0.6/include -internal-isystem /usr/local/include -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/12/../../../../x86_64-linux-gnu/include -internal-externc-isystem /usr/include/x86_64-linux-gnu -internal-externc-isystem /include -internal-externc-isystem /usr/include -Wwrite-strings -Wno-long-long -Wno-overlength-strings -Wno-unused-parameter -Wno-missing-field-initializers -Wno-unused-result -fconst-strings -fdebug-compilation-dir=/rootdir/src -ferror-limit 19 -fgnuc-version=4.2.1 -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.core.SizeofPtr -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/2022-12-26-013403-18485-1 -x c proplist.c
1/*-*- Mode: C; c-basic-offset: 8 -*-*/
2
3/***
4 This file is part of libkanberra.
5
6 Copyright 2008 Lennart Poettering
7
8 libkanberra is free software; you can redistribute it and/or modify
9 it under the terms of the GNU Lesser General Public License as
10 published by the Free Software Foundation, either version 2.1 of the
11 License, or (at your option) any later version.
12
13 libkanberra is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 Lesser General Public License for more details.
17
18 You should have received a copy of the GNU Lesser General Public
19 License along with libkanberra. If not, see
20 <http://www.gnu.org/licenses/>.
21***/
22
23#ifdef HAVE_CONFIG_H1
24#include <config.h>
25#endif
26
27#include <stdarg.h>
28
29#include "kanberra.h"
30#include "proplist.h"
31#include "macro.h"
32#include "malloc.h"
33
34static unsigned calc_hash(const char *c) {
35 unsigned hash = 0;
36
37 for (; *c; c++)
38 hash = 31 * hash + (unsigned) *c;
39
40 return hash;
41}
42
43/**
44 * ka_proplist_create:
45 * @p: A pointer where to fill in a pointer for the new property list.
46 *
47 * Allocate a new empty property list.
48 *
49 * Returns: 0 on success, negative error code on error.
50 */
51int ka_proplist_create(ka_proplist **_p) {
52 ka_proplist *p;
53 ka_return_val_if_fail(_p, KA_ERROR_INVALID)do { if ((__builtin_expect((!(_p)),0))) { if (ka_debug()) fprintf
(stderr, "Assertion '%s' failed at %s:%u, function %s().\n", "_p"
, "proplist.c", 53, __PRETTY_FUNCTION__); return (KA_ERROR_INVALID
); } } while((0));
54
55 if (!(p = ka_new0(ka_proplist, 1)((ka_proplist*) calloc(1, (sizeof(ka_proplist)*(1))))))
56 return KA_ERROR_OOM;
57
58 if (!(p->mutex = ka_mutex_new())) {
59 ka_freefree(p);
60 return KA_ERROR_OOM;
61 }
62
63 *_p = p;
64
65 return KA_SUCCESS;
66}
67
68static int _unset(ka_proplist *p, const char *key) {
69 ka_prop *prop, *nprop;
70 unsigned i;
71
72 ka_return_val_if_fail(p, KA_ERROR_INVALID)do { if ((__builtin_expect((!(p)),0))) { if (ka_debug()) fprintf
(stderr, "Assertion '%s' failed at %s:%u, function %s().\n", "p"
, "proplist.c", 72, __PRETTY_FUNCTION__); return (KA_ERROR_INVALID
); } } while((0));
73 ka_return_val_if_fail(key, KA_ERROR_INVALID)do { if ((__builtin_expect((!(key)),0))) { if (ka_debug()) fprintf
(stderr, "Assertion '%s' failed at %s:%u, function %s().\n", "key"
, "proplist.c", 73, __PRETTY_FUNCTION__); return (KA_ERROR_INVALID
); } } while((0));
74
75 i = calc_hash(key) % N_HASHTABLE31;
76
77 nprop = NULL((void*)0);
78 for (prop = p->prop_hashtable[i]; prop; nprop = prop, prop = prop->next_in_slot)
79 if (strcmp(prop->key, key) == 0)
80 break;
81
82 if (prop) {
83 if (nprop)
84 nprop->next_in_slot = prop->next_in_slot;
85 else
86 p->prop_hashtable[i] = prop->next_in_slot;
87
88 if (prop->prev_item)
89 prop->prev_item->next_item = prop->next_item;
90 else
91 p->first_item = prop->next_item;
92
93 if (prop->next_item)
94 prop->next_item->prev_item = prop->prev_item;
95
96 ka_freefree(prop->key);
97 ka_freefree(prop);
98 }
99
100 return KA_SUCCESS;
101}
102
103/**
104 * ka_proplist_sets:
105 * @p: The property list to add this key/value pair to
106 * @key: The key for this key/value pair
107 * @value: The value for this key/value pair
108 *
109 * Add a new string key/value pair to the property list.
110 *
111 * Returns: 0 on success, negative error code on error.
112 */
113
114int ka_proplist_sets(ka_proplist *p, const char *key, const char *value) {
115 ka_return_val_if_fail(p, KA_ERROR_INVALID)do { if ((__builtin_expect((!(p)),0))) { if (ka_debug()) fprintf
(stderr, "Assertion '%s' failed at %s:%u, function %s().\n", "p"
, "proplist.c", 115, __PRETTY_FUNCTION__); return (KA_ERROR_INVALID
); } } while((0));
116 ka_return_val_if_fail(key, KA_ERROR_INVALID)do { if ((__builtin_expect((!(key)),0))) { if (ka_debug()) fprintf
(stderr, "Assertion '%s' failed at %s:%u, function %s().\n", "key"
, "proplist.c", 116, __PRETTY_FUNCTION__); return (KA_ERROR_INVALID
); } } while((0));
117 ka_return_val_if_fail(value, KA_ERROR_INVALID)do { if ((__builtin_expect((!(value)),0))) { if (ka_debug()) fprintf
(stderr, "Assertion '%s' failed at %s:%u, function %s().\n", "value"
, "proplist.c", 117, __PRETTY_FUNCTION__); return (KA_ERROR_INVALID
); } } while((0));
118
119 return ka_proplist_set(p, key, value, strlen(value)+1);
120}
121
122/**
123 * ka_proplist_setf:
124 * @p: The property list to add this key/value pair to
125 * @key: The key for this key/value pair
126 * @format: The format string for the value for this key/value pair
127 * @...: The parameters for the format string
128 *
129 * Much like ka_proplist_sets(): add a new string key/value pair to
130 * the property list. Takes a standard C format string plus arguments
131 * and formats a string of it.
132 *
133 * Returns: 0 on success, negative error code on error.
134 */
135
136int ka_proplist_setf(ka_proplist *p, const char *key, const char *format, ...) {
137 int ret;
138 char *k;
139 ka_prop *prop;
140 size_t size = 100;
141 unsigned h;
142
143 ka_return_val_if_fail(p, KA_ERROR_INVALID)do { if ((__builtin_expect((!(p)),0))) { if (ka_debug()) fprintf
(stderr, "Assertion '%s' failed at %s:%u, function %s().\n", "p"
, "proplist.c", 143, __PRETTY_FUNCTION__); return (KA_ERROR_INVALID
); } } while((0));
144 ka_return_val_if_fail(key, KA_ERROR_INVALID)do { if ((__builtin_expect((!(key)),0))) { if (ka_debug()) fprintf
(stderr, "Assertion '%s' failed at %s:%u, function %s().\n", "key"
, "proplist.c", 144, __PRETTY_FUNCTION__); return (KA_ERROR_INVALID
); } } while((0));
145 ka_return_val_if_fail(format, KA_ERROR_INVALID)do { if ((__builtin_expect((!(format)),0))) { if (ka_debug())
fprintf(stderr, "Assertion '%s' failed at %s:%u, function %s().\n"
, "format" , "proplist.c", 145, __PRETTY_FUNCTION__); return (
KA_ERROR_INVALID); } } while((0));
146
147 if (!(k = ka_strdupstrdup(key)))
148 return KA_ERROR_OOM;
149
150 for (;;) {
151 va_list ap;
152 int r;
153
154 if (!(prop = ka_mallocmalloc(KA_ALIGN(sizeof(ka_prop))(ka_align(sizeof(ka_prop))) + size))) {
155 ka_freefree(k);
156 return KA_ERROR_OOM;
157 }
158
159
160 va_start(ap, format)__builtin_va_start(ap, format);
161 r = vsnprintf(KA_PROP_DATA(prop)((void*) ((char*) (prop) + (ka_align(sizeof(ka_prop))))), size, format, ap);
162 va_end(ap)__builtin_va_end(ap);
163
164 ((char*) KA_PROP_DATA(prop)((void*) ((char*) (prop) + (ka_align(sizeof(ka_prop))))))[size-1] = 0;
165
166 if (r > -1 && (size_t) r < size) {
167 prop->nbytes = (size_t) r+1;
168 break;
169 }
170
171 if (r > -1) /* glibc 2.1 */
172 size = (size_t) r+1;
This statement is never executed
173 else /* glibc 2.0 */
174 size *= 2;
175
176 ka_freefree(prop);
177 }
178
179 prop->key = k;
180
181 ka_mutex_lock(p->mutex);
182
183 if ((ret = _unset(p, key)) < 0) {
184 ka_freefree(prop);
185 ka_freefree(k);
186 goto finish;
187 }
188
189 h = calc_hash(key) % N_HASHTABLE31;
190
191 prop->next_in_slot = p->prop_hashtable[h];
192 p->prop_hashtable[h] = prop;
193
194 prop->prev_item = NULL((void*)0);
195 if ((prop->next_item = p->first_item))
196 prop->next_item->prev_item = prop;
197 p->first_item = prop;
198
199finish:
200
201 ka_mutex_unlock(p->mutex);
202
203 return ret;
204}
205
206/**
207 * ka_proplist_set:
208 * @p: The property list to add this key/value pair to
209 * @key: The key for this key/value pair
210 * @data: The binary value for this key value pair
211 * @nbytes: The size of thebinary value for this key value pair.
212 *
213 * Add a new binary key/value pair to the property list.
214 *
215 * Returns: 0 on success, negative error code on error.
216 */
217
218int ka_proplist_set(ka_proplist *p, const char *key, const void *data, size_t nbytes) {
219 int ret;
220 char *k;
221 ka_prop *prop;
222 unsigned h;
223
224 ka_return_val_if_fail(p, KA_ERROR_INVALID)do { if ((__builtin_expect((!(p)),0))) { if (ka_debug()) fprintf
(stderr, "Assertion '%s' failed at %s:%u, function %s().\n", "p"
, "proplist.c", 224, __PRETTY_FUNCTION__); return (KA_ERROR_INVALID
); } } while((0));
225 ka_return_val_if_fail(key, KA_ERROR_INVALID)do { if ((__builtin_expect((!(key)),0))) { if (ka_debug()) fprintf
(stderr, "Assertion '%s' failed at %s:%u, function %s().\n", "key"
, "proplist.c", 225, __PRETTY_FUNCTION__); return (KA_ERROR_INVALID
); } } while((0));
226 ka_return_val_if_fail(!nbytes || data, KA_ERROR_INVALID)do { if ((__builtin_expect((!(!nbytes || data)),0))) { if (ka_debug
()) fprintf(stderr, "Assertion '%s' failed at %s:%u, function %s().\n"
, "!nbytes || data" , "proplist.c", 226, __PRETTY_FUNCTION__)
; return (KA_ERROR_INVALID); } } while((0));
227
228 if (!(k = ka_strdupstrdup(key)))
229 return KA_ERROR_OOM;
230
231 if (!(prop = ka_mallocmalloc(KA_ALIGN(sizeof(ka_prop))(ka_align(sizeof(ka_prop))) + nbytes))) {
232 ka_freefree(k);
233 return KA_ERROR_OOM;
234 }
235
236 prop->key = k;
237 prop->nbytes = nbytes;
238 memcpy(KA_PROP_DATA(prop)((void*) ((char*) (prop) + (ka_align(sizeof(ka_prop))))), data, nbytes);
239
240 ka_mutex_lock(p->mutex);
241
242 if ((ret = _unset(p, key)) < 0) {
243 ka_freefree(prop);
244 ka_freefree(k);
245 goto finish;
246 }
247
248 h = calc_hash(key) % N_HASHTABLE31;
249
250 prop->next_in_slot = p->prop_hashtable[h];
251 p->prop_hashtable[h] = prop;
252
253 prop->prev_item = NULL((void*)0);
254 if ((prop->next_item = p->first_item))
255 prop->next_item->prev_item = prop;
256 p->first_item = prop;
257
258finish:
259
260 ka_mutex_unlock(p->mutex);
261
262 return ret;
263}
264
265/* Not exported, not self-locking */
266ka_prop* ka_proplist_get_unlocked(ka_proplist *p, const char *key) {
267 ka_prop *prop;
268 unsigned i;
269
270 ka_return_val_if_fail(p, NULL)do { if ((__builtin_expect((!(p)),0))) { if (ka_debug()) fprintf
(stderr, "Assertion '%s' failed at %s:%u, function %s().\n", "p"
, "proplist.c", 270, __PRETTY_FUNCTION__); return (((void*)0
)); } } while((0));
271 ka_return_val_if_fail(key, NULL)do { if ((__builtin_expect((!(key)),0))) { if (ka_debug()) fprintf
(stderr, "Assertion '%s' failed at %s:%u, function %s().\n", "key"
, "proplist.c", 271, __PRETTY_FUNCTION__); return (((void*)0
)); } } while((0));
272
273 i = calc_hash(key) % N_HASHTABLE31;
274
275 for (prop = p->prop_hashtable[i]; prop; prop = prop->next_in_slot)
276 if (strcmp(prop->key, key) == 0)
277 return prop;
278
279 return NULL((void*)0);
280}
281
282/* Not exported, not self-locking */
283const char* ka_proplist_gets_unlocked(ka_proplist *p, const char *key) {
284 ka_prop *prop;
285
286 ka_return_val_if_fail(p, NULL)do { if ((__builtin_expect((!(p)),0))) { if (ka_debug()) fprintf
(stderr, "Assertion '%s' failed at %s:%u, function %s().\n", "p"
, "proplist.c", 286, __PRETTY_FUNCTION__); return (((void*)0
)); } } while((0));
287 ka_return_val_if_fail(key, NULL)do { if ((__builtin_expect((!(key)),0))) { if (ka_debug()) fprintf
(stderr, "Assertion '%s' failed at %s:%u, function %s().\n", "key"
, "proplist.c", 287, __PRETTY_FUNCTION__); return (((void*)0
)); } } while((0));
288
289 if (!(prop = ka_proplist_get_unlocked(p, key)))
290 return NULL((void*)0);
291
292 if (!memchr(KA_PROP_DATA(prop)((void*) ((char*) (prop) + (ka_align(sizeof(ka_prop))))), 0, prop->nbytes))
293 return NULL((void*)0);
294
295 return KA_PROP_DATA(prop)((void*) ((char*) (prop) + (ka_align(sizeof(ka_prop)))));
296}
297
298/**
299 * ka_proplist_destroy:
300 * @p: The property list to destroy
301 *
302 * Destroys a property list that was created with ka_proplist_create() earlier.
303 *
304 * Returns: 0 on success, negative error code on error.
305 */
306
307int ka_proplist_destroy(ka_proplist *p) {
308 ka_prop *prop, *nprop;
309
310 ka_return_val_if_fail(p, KA_ERROR_INVALID)do { if ((__builtin_expect((!(p)),0))) { if (ka_debug()) fprintf
(stderr, "Assertion '%s' failed at %s:%u, function %s().\n", "p"
, "proplist.c", 310, __PRETTY_FUNCTION__); return (KA_ERROR_INVALID
); } } while((0));
311
312 for (prop = p->first_item; prop; prop = nprop) {
313 nprop = prop->next_item;
314 ka_freefree(prop->key);
315 ka_freefree(prop);
316 }
317
318 ka_mutex_free(p->mutex);
319
320 ka_freefree(p);
321
322 return KA_SUCCESS;
323}
324
325static int merge_into(ka_proplist *a, ka_proplist *b) {
326 int ret = KA_SUCCESS;
327 ka_prop *prop;
328
329 ka_return_val_if_fail(a, KA_ERROR_INVALID)do { if ((__builtin_expect((!(a)),0))) { if (ka_debug()) fprintf
(stderr, "Assertion '%s' failed at %s:%u, function %s().\n", "a"
, "proplist.c", 329, __PRETTY_FUNCTION__); return (KA_ERROR_INVALID
); } } while((0));
330 ka_return_val_if_fail(b, KA_ERROR_INVALID)do { if ((__builtin_expect((!(b)),0))) { if (ka_debug()) fprintf
(stderr, "Assertion '%s' failed at %s:%u, function %s().\n", "b"
, "proplist.c", 330, __PRETTY_FUNCTION__); return (KA_ERROR_INVALID
); } } while((0));
331
332 ka_mutex_lock(b->mutex);
333
334 for (prop = b->first_item; prop; prop = prop->next_item)
335 if ((ret = ka_proplist_set(a, prop->key, KA_PROP_DATA(prop)((void*) ((char*) (prop) + (ka_align(sizeof(ka_prop))))), prop->nbytes)) < 0)
336 break;
337
338 ka_mutex_unlock(b->mutex);
339
340 return ret;
341}
342
343int ka_proplist_merge(ka_proplist **_a, ka_proplist *b, ka_proplist *c) {
344 ka_proplist *a;
345 int ret;
346
347 ka_return_val_if_fail(_a, KA_ERROR_INVALID)do { if ((__builtin_expect((!(_a)),0))) { if (ka_debug()) fprintf
(stderr, "Assertion '%s' failed at %s:%u, function %s().\n", "_a"
, "proplist.c", 347, __PRETTY_FUNCTION__); return (KA_ERROR_INVALID
); } } while((0));
348 ka_return_val_if_fail(b, KA_ERROR_INVALID)do { if ((__builtin_expect((!(b)),0))) { if (ka_debug()) fprintf
(stderr, "Assertion '%s' failed at %s:%u, function %s().\n", "b"
, "proplist.c", 348, __PRETTY_FUNCTION__); return (KA_ERROR_INVALID
); } } while((0));
349 ka_return_val_if_fail(c, KA_ERROR_INVALID)do { if ((__builtin_expect((!(c)),0))) { if (ka_debug()) fprintf
(stderr, "Assertion '%s' failed at %s:%u, function %s().\n", "c"
, "proplist.c", 349, __PRETTY_FUNCTION__); return (KA_ERROR_INVALID
); } } while((0));
350
351 if ((ret = ka_proplist_create(&a)) < 0)
352 return ret;
353
354 if ((ret = merge_into(a, b)) < 0 ||
355 (ret = merge_into(a, c)) < 0) {
356 ka_proplist_destroy(a);
357 return ret;
358 }
359
360 *_a = a;
361 return KA_SUCCESS;
362}
363
364ka_bool_t ka_proplist_contains(ka_proplist *p, const char *key) {
365 ka_bool_t b;
366
367 ka_return_val_if_fail(p, FALSE)do { if ((__builtin_expect((!(p)),0))) { if (ka_debug()) fprintf
(stderr, "Assertion '%s' failed at %s:%u, function %s().\n", "p"
, "proplist.c", 367, __PRETTY_FUNCTION__); return ((0)); } }
while((0));
368 ka_return_val_if_fail(key, FALSE)do { if ((__builtin_expect((!(key)),0))) { if (ka_debug()) fprintf
(stderr, "Assertion '%s' failed at %s:%u, function %s().\n", "key"
, "proplist.c", 368, __PRETTY_FUNCTION__); return ((0)); } }
while((0));
369
370 ka_mutex_lock(p->mutex);
371 b = !!ka_proplist_get_unlocked(p, key);
372 ka_mutex_unlock(p->mutex);
373
374 return b;
375}
376
377int ka_proplist_merge_ap(ka_proplist *p, va_list ap) {
378 int ret;
379
380 ka_return_val_if_fail(p, KA_ERROR_INVALID)do { if ((__builtin_expect((!(p)),0))) { if (ka_debug()) fprintf
(stderr, "Assertion '%s' failed at %s:%u, function %s().\n", "p"
, "proplist.c", 380, __PRETTY_FUNCTION__); return (KA_ERROR_INVALID
); } } while((0));
381
382 for (;;) {
383 const char *key, *value;
384
385 if (!(key = va_arg(ap, const char*)__builtin_va_arg(ap, const char*)))
386 break;
387
388 if (!(value = va_arg(ap, const char*)__builtin_va_arg(ap, const char*)))
389 return KA_ERROR_INVALID;
390
391 if ((ret = ka_proplist_sets(p, key, value)) < 0)
392 return ret;
393 }
394
395 return KA_SUCCESS;
396}
397
398int ka_proplist_from_ap(ka_proplist **_p, va_list ap) {
399 int ret;
400 ka_proplist *p;
401
402 ka_return_val_if_fail(_p, KA_ERROR_INVALID)do { if ((__builtin_expect((!(_p)),0))) { if (ka_debug()) fprintf
(stderr, "Assertion '%s' failed at %s:%u, function %s().\n", "_p"
, "proplist.c", 402, __PRETTY_FUNCTION__); return (KA_ERROR_INVALID
); } } while((0));
403
404 if ((ret = ka_proplist_create(&p)) < 0)
405 return ret;
406
407 if ((ret = ka_proplist_merge_ap(p, ap)) < 0)
408 goto fail;
409
410 *_p = p;
411
412 return KA_SUCCESS;
413
414fail:
415 ka_assert_se(ka_proplist_destroy(p) == KA_SUCCESS)do { if ((__builtin_expect((!(ka_proplist_destroy(p) == KA_SUCCESS
)),0))) { fprintf(stderr, "Assertion '%s' failed at %s:%u, function %s(). Aborting.\n"
, "ka_proplist_destroy(p) == KA_SUCCESS" , "proplist.c", 415,
__PRETTY_FUNCTION__); abort(); } } while ((0));
416
417 return ret;
418}