Bug Summary

File:root/firefox-clang/media/ffvpx/libavutil/mem.c
Warning:line 145, column 9
Value stored to 'size' is never read

Annotated Source Code

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clang -cc1 -cc1 -triple x86_64-pc-linux-gnu -O2 -analyze -disable-free -clear-ast-before-backend -disable-llvm-verifier -discard-value-names -main-file-name mem.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 -analyzer-config-compatibility-mode=true -mrelocation-model pic -pic-level 2 -fhalf-no-semantic-interposition -mframe-pointer=all -relaxed-aliasing -ffp-contract=off -fno-rounding-math -mconstructor-aliases -funwind-tables=2 -target-cpu x86-64 -tune-cpu generic -debugger-tuning=gdb -fdebug-compilation-dir=/root/firefox-clang/obj-x86_64-pc-linux-gnu/media/ffvpx/libavutil -fcoverage-compilation-dir=/root/firefox-clang/obj-x86_64-pc-linux-gnu/media/ffvpx/libavutil -resource-dir /usr/lib/llvm-23/lib/clang/23 -include /root/firefox-clang/obj-x86_64-pc-linux-gnu/mozilla-config.h -include libavutil_visibility.h -U _FORTIFY_SOURCE -D _FORTIFY_SOURCE=2 -D DEBUG=1 -D HAVE_AV_CONFIG_H -D ASSERT_LEVEL=2 -I /root/firefox-clang/media/ffvpx/libavutil -I /root/firefox-clang/obj-x86_64-pc-linux-gnu/media/ffvpx/libavutil -I /root/firefox-clang/third_party/khronos/vulkan-headers/include -I /root/firefox-clang/media/mozva -I /root/firefox-clang/media/ffvpx -I /root/firefox-clang/obj-x86_64-pc-linux-gnu/dist/include -I /root/firefox-clang/obj-x86_64-pc-linux-gnu/dist/include/nspr -I /root/firefox-clang/obj-x86_64-pc-linux-gnu/dist/include/nss -D MOZILLA_CLIENT -internal-isystem /usr/lib/llvm-23/lib/clang/23/include -internal-isystem /usr/local/include -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/16/../../../../x86_64-linux-gnu/include -internal-externc-isystem /usr/include/x86_64-linux-gnu -internal-externc-isystem /include -internal-externc-isystem /usr/include -Wno-error=tautological-type-limit-compare -Wno-range-loop-analysis -Wno-error=deprecated-declarations -Wno-error=array-bounds -Wno-error=free-nonheap-object -Wno-error=atomic-alignment -Wno-error=deprecated-builtins -Wno-psabi -Wno-error=builtin-macro-redefined -Wno-unknown-warning-option -Wno-character-conversion -Wno-parentheses -Wno-pointer-sign -Wno-sign-compare -Wno-switch -Wno-type-limits -Wno-unused-function -Wno-deprecated-declarations -Wno-absolute-value -Wno-incompatible-pointer-types -Wno-string-conversion -Wno-visibility -ferror-limit 19 -fstrict-flex-arrays=1 -stack-protector 2 -fstack-clash-protection -ftrivial-auto-var-init=pattern -fgnuc-version=4.2.1 -fskip-odr-check-in-gmf -fdiagnostics-absolute-paths -vectorize-loops -vectorize-slp -analyzer-checker optin.performance.Padding -analyzer-output=html -analyzer-config stable-report-filename=true -mllvm -dwarf-linkage-names=Abstract -faddrsig -fdwarf2-cfi-asm -o /tmp/scan-build-2026-09-01-224014-2642839-1 -x c /root/firefox-clang/media/ffvpx/libavutil/mem.c
1/*
2 * default memory allocator for libavutil
3 * Copyright (c) 2002 Fabrice Bellard
4 *
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22/**
23 * @file
24 * default memory allocator for libavutil
25 */
26
27#define _XOPEN_SOURCE600 600
28
29#include "config.h"
30
31#include <limits.h>
32#include <stdint.h>
33#include <stdlib.h>
34#include <stdatomic.h>
35#include <string.h>
36#if HAVE_MALLOC_H1
37#include <malloc.h>
38#endif
39
40#include "attributes.h"
41#include "avassert.h"
42#include "dynarray.h"
43#include "error.h"
44#include "internal.h"
45#include "intreadwrite.h"
46#include "macros.h"
47#include "mem.h"
48
49#ifdef MALLOC_PREFIX
50
51#define malloc AV_JOIN(MALLOC_PREFIX, malloc)MALLOC_PREFIXmalloc
52#define memalign AV_JOIN(MALLOC_PREFIX, memalign)MALLOC_PREFIXmemalign
53#define posix_memalign AV_JOIN(MALLOC_PREFIX, posix_memalign)MALLOC_PREFIXposix_memalign
54#define realloc AV_JOIN(MALLOC_PREFIX, realloc)MALLOC_PREFIXrealloc
55#define free AV_JOIN(MALLOC_PREFIX, free)MALLOC_PREFIXfree
56
57void *malloc(size_t size);
58void *memalign(size_t align, size_t size);
59int posix_memalign(void **ptr, size_t align, size_t size);
60void *realloc(void *ptr, size_t size);
61void free(void *ptr);
62
63#endif /* MALLOC_PREFIX */
64
65#define ALIGN(1 ? 64 : (1 ? 32 : 16)) (HAVE_SIMD_ALIGN_641 ? 64 : (HAVE_SIMD_ALIGN_321 ? 32 : 16))
66
67#define FF_MEMORY_POISON0x2a 0x2a
68
69/* NOTE: if you want to override these functions with your own
70 * implementations (not recommended) you have to link libav* as
71 * dynamic libraries and remove -Wl,-Bsymbolic from the linker flags.
72 * Note that this will cost performance. */
73
74static atomic_size_t max_alloc_size = INT_MAX2147483647;
75
76void av_max_alloc(size_t max){
77 atomic_store_explicit__c11_atomic_store(&max_alloc_size, max, memory_order_relaxed);
78}
79
80static int size_mult(size_t a, size_t b, size_t *r)
81{
82 size_t t;
83
84#if (!defined(__INTEL_COMPILER) && AV_GCC_VERSION_AT_LEAST(5,1)(4 > (5) || 4 == (5) && 2 >= (1))) || AV_HAS_BUILTIN(__builtin_mul_overflow)1
85 if (__builtin_mul_overflow(a, b, &t))
86 return AVERROR(EINVAL)(-(22));
87#else
88 t = a * b;
89 /* Hack inspired from glibc: don't try the division if nelem and elsize
90 * are both less than sqrt(SIZE_MAX). */
91 if ((a | b) >= ((size_t)1 << (sizeof(size_t) * 4)) && a && t / a != b)
92 return AVERROR(EINVAL)(-(22));
93#endif
94 *r = t;
95 return 0;
96}
97
98void *av_malloc(size_t size)
99{
100 void *ptr = NULL((void*)0);
101
102 if (size > atomic_load_explicit__c11_atomic_load(&max_alloc_size, memory_order_relaxed))
103 return NULL((void*)0);
104
105#if HAVE_POSIX_MEMALIGN1
106 if (size) //OS X on SDK 10.6 has a broken posix_memalign implementation
107 if (posix_memalign(&ptr, ALIGN(1 ? 64 : (1 ? 32 : 16)), size))
108 ptr = NULL((void*)0);
109#elif HAVE_ALIGNED_MALLOC0
110 ptr = _aligned_malloc(size, ALIGN(1 ? 64 : (1 ? 32 : 16)));
111#elif HAVE_MEMALIGN1
112#ifndef __DJGPP__
113 ptr = memalign(ALIGN(1 ? 64 : (1 ? 32 : 16)), size);
114#else
115 ptr = memalign(size, ALIGN(1 ? 64 : (1 ? 32 : 16)));
116#endif
117 /* Why 64?
118 * Indeed, we should align it:
119 * on 4 for 386
120 * on 16 for 486
121 * on 32 for 586, PPro - K6-III
122 * on 64 for K7 (maybe for P3 too).
123 * Because L1 and L2 caches are aligned on those values.
124 * But I don't want to code such logic here!
125 */
126 /* Why 32?
127 * For AVX ASM. SSE / NEON needs only 16.
128 * Why not larger? Because I did not see a difference in benchmarks ...
129 */
130 /* benchmarks with P3
131 * memalign(64) + 1 3071, 3051, 3032
132 * memalign(64) + 2 3051, 3032, 3041
133 * memalign(64) + 4 2911, 2896, 2915
134 * memalign(64) + 8 2545, 2554, 2550
135 * memalign(64) + 16 2543, 2572, 2563
136 * memalign(64) + 32 2546, 2545, 2571
137 * memalign(64) + 64 2570, 2533, 2558
138 *
139 * BTW, malloc seems to do 8-byte alignment by default here.
140 */
141#else
142 ptr = malloc(size);
143#endif
144 if(!ptr && !size) {
145 size = 1;
Value stored to 'size' is never read
146 ptr= av_malloc(1);
147 }
148#if CONFIG_MEMORY_POISONING0
149 if (ptr)
150 memset(ptr, FF_MEMORY_POISON0x2a, size);
151#endif
152 return ptr;
153}
154
155void *av_realloc(void *ptr, size_t size)
156{
157 void *ret;
158 if (size > atomic_load_explicit__c11_atomic_load(&max_alloc_size, memory_order_relaxed))
159 return NULL((void*)0);
160
161#if HAVE_ALIGNED_MALLOC0
162 ret = _aligned_realloc(ptr, size + !size, ALIGN(1 ? 64 : (1 ? 32 : 16)));
163#else
164 ret = realloc(ptr, size + !size);
165#endif
166#if CONFIG_MEMORY_POISONING0
167 if (ret && !ptr)
168 memset(ret, FF_MEMORY_POISON0x2a, size);
169#endif
170 return ret;
171}
172
173void *av_realloc_f(void *ptr, size_t nelem, size_t elsize)
174{
175 size_t size;
176 void *r;
177
178 if (size_mult(elsize, nelem, &size)) {
179 av_free(ptr);
180 return NULL((void*)0);
181 }
182 r = av_realloc(ptr, size);
183 if (!r)
184 av_free(ptr);
185 return r;
186}
187
188int av_reallocp(void *ptr, size_t size)
189{
190 void *val;
191
192 if (!size) {
193 av_freep(ptr);
194 return 0;
195 }
196
197 memcpy(&val, ptr, sizeof(val));
198 val = av_realloc(val, size);
199
200 if (!val) {
201 av_freep(ptr);
202 return AVERROR(ENOMEM)(-(12));
203 }
204
205 memcpy(ptr, &val, sizeof(val));
206 return 0;
207}
208
209void *av_malloc_array(size_t nmemb, size_t size)
210{
211 size_t result;
212 if (size_mult(nmemb, size, &result) < 0)
213 return NULL((void*)0);
214 return av_malloc(result);
215}
216
217void *av_realloc_array(void *ptr, size_t nmemb, size_t size)
218{
219 size_t result;
220 if (size_mult(nmemb, size, &result) < 0)
221 return NULL((void*)0);
222 return av_realloc(ptr, result);
223}
224
225int av_reallocp_array(void *ptr, size_t nmemb, size_t size)
226{
227 void *val;
228
229 memcpy(&val, ptr, sizeof(val));
230 val = av_realloc_f(val, nmemb, size);
231 memcpy(ptr, &val, sizeof(val));
232 if (!val && nmemb && size)
233 return AVERROR(ENOMEM)(-(12));
234
235 return 0;
236}
237
238void av_free(void *ptr)
239{
240#if HAVE_ALIGNED_MALLOC0
241 _aligned_free(ptr);
242#else
243 free(ptr);
244#endif
245}
246
247void av_freep(void *arg)
248{
249 void *val;
250
251 memcpy(&val, arg, sizeof(val));
252 memcpy(arg, &(void *){ NULL((void*)0) }, sizeof(val));
253 av_free(val);
254}
255
256void *av_mallocz(size_t size)
257{
258 void *ptr = av_malloc(size);
259 if (ptr)
260 memset(ptr, 0, size);
261 return ptr;
262}
263
264void *av_calloc(size_t nmemb, size_t size)
265{
266 size_t result;
267 if (size_mult(nmemb, size, &result) < 0)
268 return NULL((void*)0);
269 return av_mallocz(result);
270}
271
272char *av_strdup(const char *s)
273{
274 char *ptr = NULL((void*)0);
275 if (s) {
276 size_t len = strlen(s) + 1;
277 ptr = av_realloc(NULL((void*)0), len);
278 if (ptr)
279 memcpy(ptr, s, len);
280 }
281 return ptr;
282}
283
284char *av_strndup(const char *s, size_t len)
285{
286 char *ret = NULL((void*)0), *end;
287
288 if (!s)
289 return NULL((void*)0);
290
291 end = memchr(s, 0, len);
292 if (end)
293 len = end - s;
294
295 ret = av_realloc(NULL((void*)0), len + 1);
296 if (!ret)
297 return NULL((void*)0);
298
299 memcpy(ret, s, len);
300 ret[len] = 0;
301 return ret;
302}
303
304void *av_memdup(const void *p, size_t size)
305{
306 void *ptr = NULL((void*)0);
307 if (p) {
308 ptr = av_malloc(size);
309 if (ptr)
310 memcpy(ptr, p, size);
311 }
312 return ptr;
313}
314
315int av_dynarray_add_nofree(void *tab_ptr, int *nb_ptr, void *elem)
316{
317 void **tab;
318 memcpy(&tab, tab_ptr, sizeof(tab));
319
320 FF_DYNARRAY_ADD(INT_MAX, sizeof(*tab), tab, *nb_ptr, {do { size_t av_size_new = (*nb_ptr); if (!((*nb_ptr) & ((
*nb_ptr) - 1))) { av_size_new = (*nb_ptr) ? (*nb_ptr) <<
1 : 1; if (av_size_new > (2147483647) / (sizeof(*tab))) {
av_size_new = 0; } else { void *av_array_new = av_realloc((tab
), av_size_new * (sizeof(*tab))); if (!av_array_new) av_size_new
= 0; else (tab) = av_array_new; } } if (av_size_new) { { { tab
[*nb_ptr] = elem; memcpy(tab_ptr, &tab, sizeof(tab)); } }
(*nb_ptr)++; } else { { return (-(12)); } } } while (0)
321 tab[*nb_ptr] = elem;do { size_t av_size_new = (*nb_ptr); if (!((*nb_ptr) & ((
*nb_ptr) - 1))) { av_size_new = (*nb_ptr) ? (*nb_ptr) <<
1 : 1; if (av_size_new > (2147483647) / (sizeof(*tab))) {
av_size_new = 0; } else { void *av_array_new = av_realloc((tab
), av_size_new * (sizeof(*tab))); if (!av_array_new) av_size_new
= 0; else (tab) = av_array_new; } } if (av_size_new) { { { tab
[*nb_ptr] = elem; memcpy(tab_ptr, &tab, sizeof(tab)); } }
(*nb_ptr)++; } else { { return (-(12)); } } } while (0)
322 memcpy(tab_ptr, &tab, sizeof(tab));do { size_t av_size_new = (*nb_ptr); if (!((*nb_ptr) & ((
*nb_ptr) - 1))) { av_size_new = (*nb_ptr) ? (*nb_ptr) <<
1 : 1; if (av_size_new > (2147483647) / (sizeof(*tab))) {
av_size_new = 0; } else { void *av_array_new = av_realloc((tab
), av_size_new * (sizeof(*tab))); if (!av_array_new) av_size_new
= 0; else (tab) = av_array_new; } } if (av_size_new) { { { tab
[*nb_ptr] = elem; memcpy(tab_ptr, &tab, sizeof(tab)); } }
(*nb_ptr)++; } else { { return (-(12)); } } } while (0)
323 }, {do { size_t av_size_new = (*nb_ptr); if (!((*nb_ptr) & ((
*nb_ptr) - 1))) { av_size_new = (*nb_ptr) ? (*nb_ptr) <<
1 : 1; if (av_size_new > (2147483647) / (sizeof(*tab))) {
av_size_new = 0; } else { void *av_array_new = av_realloc((tab
), av_size_new * (sizeof(*tab))); if (!av_array_new) av_size_new
= 0; else (tab) = av_array_new; } } if (av_size_new) { { { tab
[*nb_ptr] = elem; memcpy(tab_ptr, &tab, sizeof(tab)); } }
(*nb_ptr)++; } else { { return (-(12)); } } } while (0)
324 return AVERROR(ENOMEM);do { size_t av_size_new = (*nb_ptr); if (!((*nb_ptr) & ((
*nb_ptr) - 1))) { av_size_new = (*nb_ptr) ? (*nb_ptr) <<
1 : 1; if (av_size_new > (2147483647) / (sizeof(*tab))) {
av_size_new = 0; } else { void *av_array_new = av_realloc((tab
), av_size_new * (sizeof(*tab))); if (!av_array_new) av_size_new
= 0; else (tab) = av_array_new; } } if (av_size_new) { { { tab
[*nb_ptr] = elem; memcpy(tab_ptr, &tab, sizeof(tab)); } }
(*nb_ptr)++; } else { { return (-(12)); } } } while (0)
325 })do { size_t av_size_new = (*nb_ptr); if (!((*nb_ptr) & ((
*nb_ptr) - 1))) { av_size_new = (*nb_ptr) ? (*nb_ptr) <<
1 : 1; if (av_size_new > (2147483647) / (sizeof(*tab))) {
av_size_new = 0; } else { void *av_array_new = av_realloc((tab
), av_size_new * (sizeof(*tab))); if (!av_array_new) av_size_new
= 0; else (tab) = av_array_new; } } if (av_size_new) { { { tab
[*nb_ptr] = elem; memcpy(tab_ptr, &tab, sizeof(tab)); } }
(*nb_ptr)++; } else { { return (-(12)); } } } while (0);
326 return 0;
327}
328
329void av_dynarray_add(void *tab_ptr, int *nb_ptr, void *elem)
330{
331 void **tab;
332 memcpy(&tab, tab_ptr, sizeof(tab));
333
334 FF_DYNARRAY_ADD(INT_MAX, sizeof(*tab), tab, *nb_ptr, {do { size_t av_size_new = (*nb_ptr); if (!((*nb_ptr) & ((
*nb_ptr) - 1))) { av_size_new = (*nb_ptr) ? (*nb_ptr) <<
1 : 1; if (av_size_new > (2147483647) / (sizeof(*tab))) {
av_size_new = 0; } else { void *av_array_new = av_realloc((tab
), av_size_new * (sizeof(*tab))); if (!av_array_new) av_size_new
= 0; else (tab) = av_array_new; } } if (av_size_new) { { { tab
[*nb_ptr] = elem; memcpy(tab_ptr, &tab, sizeof(tab)); } }
(*nb_ptr)++; } else { { *nb_ptr = 0; av_freep(tab_ptr); } } }
while (0)
335 tab[*nb_ptr] = elem;do { size_t av_size_new = (*nb_ptr); if (!((*nb_ptr) & ((
*nb_ptr) - 1))) { av_size_new = (*nb_ptr) ? (*nb_ptr) <<
1 : 1; if (av_size_new > (2147483647) / (sizeof(*tab))) {
av_size_new = 0; } else { void *av_array_new = av_realloc((tab
), av_size_new * (sizeof(*tab))); if (!av_array_new) av_size_new
= 0; else (tab) = av_array_new; } } if (av_size_new) { { { tab
[*nb_ptr] = elem; memcpy(tab_ptr, &tab, sizeof(tab)); } }
(*nb_ptr)++; } else { { *nb_ptr = 0; av_freep(tab_ptr); } } }
while (0)
336 memcpy(tab_ptr, &tab, sizeof(tab));do { size_t av_size_new = (*nb_ptr); if (!((*nb_ptr) & ((
*nb_ptr) - 1))) { av_size_new = (*nb_ptr) ? (*nb_ptr) <<
1 : 1; if (av_size_new > (2147483647) / (sizeof(*tab))) {
av_size_new = 0; } else { void *av_array_new = av_realloc((tab
), av_size_new * (sizeof(*tab))); if (!av_array_new) av_size_new
= 0; else (tab) = av_array_new; } } if (av_size_new) { { { tab
[*nb_ptr] = elem; memcpy(tab_ptr, &tab, sizeof(tab)); } }
(*nb_ptr)++; } else { { *nb_ptr = 0; av_freep(tab_ptr); } } }
while (0)
337 }, {do { size_t av_size_new = (*nb_ptr); if (!((*nb_ptr) & ((
*nb_ptr) - 1))) { av_size_new = (*nb_ptr) ? (*nb_ptr) <<
1 : 1; if (av_size_new > (2147483647) / (sizeof(*tab))) {
av_size_new = 0; } else { void *av_array_new = av_realloc((tab
), av_size_new * (sizeof(*tab))); if (!av_array_new) av_size_new
= 0; else (tab) = av_array_new; } } if (av_size_new) { { { tab
[*nb_ptr] = elem; memcpy(tab_ptr, &tab, sizeof(tab)); } }
(*nb_ptr)++; } else { { *nb_ptr = 0; av_freep(tab_ptr); } } }
while (0)
338 *nb_ptr = 0;do { size_t av_size_new = (*nb_ptr); if (!((*nb_ptr) & ((
*nb_ptr) - 1))) { av_size_new = (*nb_ptr) ? (*nb_ptr) <<
1 : 1; if (av_size_new > (2147483647) / (sizeof(*tab))) {
av_size_new = 0; } else { void *av_array_new = av_realloc((tab
), av_size_new * (sizeof(*tab))); if (!av_array_new) av_size_new
= 0; else (tab) = av_array_new; } } if (av_size_new) { { { tab
[*nb_ptr] = elem; memcpy(tab_ptr, &tab, sizeof(tab)); } }
(*nb_ptr)++; } else { { *nb_ptr = 0; av_freep(tab_ptr); } } }
while (0)
339 av_freep(tab_ptr);do { size_t av_size_new = (*nb_ptr); if (!((*nb_ptr) & ((
*nb_ptr) - 1))) { av_size_new = (*nb_ptr) ? (*nb_ptr) <<
1 : 1; if (av_size_new > (2147483647) / (sizeof(*tab))) {
av_size_new = 0; } else { void *av_array_new = av_realloc((tab
), av_size_new * (sizeof(*tab))); if (!av_array_new) av_size_new
= 0; else (tab) = av_array_new; } } if (av_size_new) { { { tab
[*nb_ptr] = elem; memcpy(tab_ptr, &tab, sizeof(tab)); } }
(*nb_ptr)++; } else { { *nb_ptr = 0; av_freep(tab_ptr); } } }
while (0)
340 })do { size_t av_size_new = (*nb_ptr); if (!((*nb_ptr) & ((
*nb_ptr) - 1))) { av_size_new = (*nb_ptr) ? (*nb_ptr) <<
1 : 1; if (av_size_new > (2147483647) / (sizeof(*tab))) {
av_size_new = 0; } else { void *av_array_new = av_realloc((tab
), av_size_new * (sizeof(*tab))); if (!av_array_new) av_size_new
= 0; else (tab) = av_array_new; } } if (av_size_new) { { { tab
[*nb_ptr] = elem; memcpy(tab_ptr, &tab, sizeof(tab)); } }
(*nb_ptr)++; } else { { *nb_ptr = 0; av_freep(tab_ptr); } } }
while (0);
341}
342
343void *av_dynarray2_add(void **tab_ptr, int *nb_ptr, size_t elem_size,
344 const uint8_t *elem_data)
345{
346 uint8_t *tab_elem_data = NULL((void*)0);
347
348 FF_DYNARRAY_ADD(INT_MAX, elem_size, *tab_ptr, *nb_ptr, {do { size_t av_size_new = (*nb_ptr); if (!((*nb_ptr) & ((
*nb_ptr) - 1))) { av_size_new = (*nb_ptr) ? (*nb_ptr) <<
1 : 1; if (av_size_new > (2147483647) / (elem_size)) { av_size_new
= 0; } else { void *av_array_new = av_realloc((*tab_ptr), av_size_new
* (elem_size)); if (!av_array_new) av_size_new = 0; else (*tab_ptr
) = av_array_new; } } if (av_size_new) { { { tab_elem_data = (
uint8_t *)*tab_ptr + (*nb_ptr) * elem_size; if (elem_data) memcpy
(tab_elem_data, elem_data, elem_size); else if (0) memset(tab_elem_data
, 0x2a, elem_size); } } (*nb_ptr)++; } else { { av_freep(tab_ptr
); *nb_ptr = 0; } } } while (0)
349 tab_elem_data = (uint8_t *)*tab_ptr + (*nb_ptr) * elem_size;do { size_t av_size_new = (*nb_ptr); if (!((*nb_ptr) & ((
*nb_ptr) - 1))) { av_size_new = (*nb_ptr) ? (*nb_ptr) <<
1 : 1; if (av_size_new > (2147483647) / (elem_size)) { av_size_new
= 0; } else { void *av_array_new = av_realloc((*tab_ptr), av_size_new
* (elem_size)); if (!av_array_new) av_size_new = 0; else (*tab_ptr
) = av_array_new; } } if (av_size_new) { { { tab_elem_data = (
uint8_t *)*tab_ptr + (*nb_ptr) * elem_size; if (elem_data) memcpy
(tab_elem_data, elem_data, elem_size); else if (0) memset(tab_elem_data
, 0x2a, elem_size); } } (*nb_ptr)++; } else { { av_freep(tab_ptr
); *nb_ptr = 0; } } } while (0)
350 if (elem_data)do { size_t av_size_new = (*nb_ptr); if (!((*nb_ptr) & ((
*nb_ptr) - 1))) { av_size_new = (*nb_ptr) ? (*nb_ptr) <<
1 : 1; if (av_size_new > (2147483647) / (elem_size)) { av_size_new
= 0; } else { void *av_array_new = av_realloc((*tab_ptr), av_size_new
* (elem_size)); if (!av_array_new) av_size_new = 0; else (*tab_ptr
) = av_array_new; } } if (av_size_new) { { { tab_elem_data = (
uint8_t *)*tab_ptr + (*nb_ptr) * elem_size; if (elem_data) memcpy
(tab_elem_data, elem_data, elem_size); else if (0) memset(tab_elem_data
, 0x2a, elem_size); } } (*nb_ptr)++; } else { { av_freep(tab_ptr
); *nb_ptr = 0; } } } while (0)
351 memcpy(tab_elem_data, elem_data, elem_size);do { size_t av_size_new = (*nb_ptr); if (!((*nb_ptr) & ((
*nb_ptr) - 1))) { av_size_new = (*nb_ptr) ? (*nb_ptr) <<
1 : 1; if (av_size_new > (2147483647) / (elem_size)) { av_size_new
= 0; } else { void *av_array_new = av_realloc((*tab_ptr), av_size_new
* (elem_size)); if (!av_array_new) av_size_new = 0; else (*tab_ptr
) = av_array_new; } } if (av_size_new) { { { tab_elem_data = (
uint8_t *)*tab_ptr + (*nb_ptr) * elem_size; if (elem_data) memcpy
(tab_elem_data, elem_data, elem_size); else if (0) memset(tab_elem_data
, 0x2a, elem_size); } } (*nb_ptr)++; } else { { av_freep(tab_ptr
); *nb_ptr = 0; } } } while (0)
352 else if (CONFIG_MEMORY_POISONING)do { size_t av_size_new = (*nb_ptr); if (!((*nb_ptr) & ((
*nb_ptr) - 1))) { av_size_new = (*nb_ptr) ? (*nb_ptr) <<
1 : 1; if (av_size_new > (2147483647) / (elem_size)) { av_size_new
= 0; } else { void *av_array_new = av_realloc((*tab_ptr), av_size_new
* (elem_size)); if (!av_array_new) av_size_new = 0; else (*tab_ptr
) = av_array_new; } } if (av_size_new) { { { tab_elem_data = (
uint8_t *)*tab_ptr + (*nb_ptr) * elem_size; if (elem_data) memcpy
(tab_elem_data, elem_data, elem_size); else if (0) memset(tab_elem_data
, 0x2a, elem_size); } } (*nb_ptr)++; } else { { av_freep(tab_ptr
); *nb_ptr = 0; } } } while (0)
353 memset(tab_elem_data, FF_MEMORY_POISON, elem_size);do { size_t av_size_new = (*nb_ptr); if (!((*nb_ptr) & ((
*nb_ptr) - 1))) { av_size_new = (*nb_ptr) ? (*nb_ptr) <<
1 : 1; if (av_size_new > (2147483647) / (elem_size)) { av_size_new
= 0; } else { void *av_array_new = av_realloc((*tab_ptr), av_size_new
* (elem_size)); if (!av_array_new) av_size_new = 0; else (*tab_ptr
) = av_array_new; } } if (av_size_new) { { { tab_elem_data = (
uint8_t *)*tab_ptr + (*nb_ptr) * elem_size; if (elem_data) memcpy
(tab_elem_data, elem_data, elem_size); else if (0) memset(tab_elem_data
, 0x2a, elem_size); } } (*nb_ptr)++; } else { { av_freep(tab_ptr
); *nb_ptr = 0; } } } while (0)
354 }, {do { size_t av_size_new = (*nb_ptr); if (!((*nb_ptr) & ((
*nb_ptr) - 1))) { av_size_new = (*nb_ptr) ? (*nb_ptr) <<
1 : 1; if (av_size_new > (2147483647) / (elem_size)) { av_size_new
= 0; } else { void *av_array_new = av_realloc((*tab_ptr), av_size_new
* (elem_size)); if (!av_array_new) av_size_new = 0; else (*tab_ptr
) = av_array_new; } } if (av_size_new) { { { tab_elem_data = (
uint8_t *)*tab_ptr + (*nb_ptr) * elem_size; if (elem_data) memcpy
(tab_elem_data, elem_data, elem_size); else if (0) memset(tab_elem_data
, 0x2a, elem_size); } } (*nb_ptr)++; } else { { av_freep(tab_ptr
); *nb_ptr = 0; } } } while (0)
355 av_freep(tab_ptr);do { size_t av_size_new = (*nb_ptr); if (!((*nb_ptr) & ((
*nb_ptr) - 1))) { av_size_new = (*nb_ptr) ? (*nb_ptr) <<
1 : 1; if (av_size_new > (2147483647) / (elem_size)) { av_size_new
= 0; } else { void *av_array_new = av_realloc((*tab_ptr), av_size_new
* (elem_size)); if (!av_array_new) av_size_new = 0; else (*tab_ptr
) = av_array_new; } } if (av_size_new) { { { tab_elem_data = (
uint8_t *)*tab_ptr + (*nb_ptr) * elem_size; if (elem_data) memcpy
(tab_elem_data, elem_data, elem_size); else if (0) memset(tab_elem_data
, 0x2a, elem_size); } } (*nb_ptr)++; } else { { av_freep(tab_ptr
); *nb_ptr = 0; } } } while (0)
356 *nb_ptr = 0;do { size_t av_size_new = (*nb_ptr); if (!((*nb_ptr) & ((
*nb_ptr) - 1))) { av_size_new = (*nb_ptr) ? (*nb_ptr) <<
1 : 1; if (av_size_new > (2147483647) / (elem_size)) { av_size_new
= 0; } else { void *av_array_new = av_realloc((*tab_ptr), av_size_new
* (elem_size)); if (!av_array_new) av_size_new = 0; else (*tab_ptr
) = av_array_new; } } if (av_size_new) { { { tab_elem_data = (
uint8_t *)*tab_ptr + (*nb_ptr) * elem_size; if (elem_data) memcpy
(tab_elem_data, elem_data, elem_size); else if (0) memset(tab_elem_data
, 0x2a, elem_size); } } (*nb_ptr)++; } else { { av_freep(tab_ptr
); *nb_ptr = 0; } } } while (0)
357 })do { size_t av_size_new = (*nb_ptr); if (!((*nb_ptr) & ((
*nb_ptr) - 1))) { av_size_new = (*nb_ptr) ? (*nb_ptr) <<
1 : 1; if (av_size_new > (2147483647) / (elem_size)) { av_size_new
= 0; } else { void *av_array_new = av_realloc((*tab_ptr), av_size_new
* (elem_size)); if (!av_array_new) av_size_new = 0; else (*tab_ptr
) = av_array_new; } } if (av_size_new) { { { tab_elem_data = (
uint8_t *)*tab_ptr + (*nb_ptr) * elem_size; if (elem_data) memcpy
(tab_elem_data, elem_data, elem_size); else if (0) memset(tab_elem_data
, 0x2a, elem_size); } } (*nb_ptr)++; } else { { av_freep(tab_ptr
); *nb_ptr = 0; } } } while (0);
358 return tab_elem_data;
359}
360
361static void fill16(uint8_t *dst, int len)
362{
363 uint32_t v = AV_RN16(dst - 2)(((const union unaligned_16 *) (dst - 2))->l);
364
365 v |= v << 16;
366
367 while (len >= 4) {
368 AV_WN32(dst, v)((((union unaligned_32 *) (dst))->l) = (v));
369 dst += 4;
370 len -= 4;
371 }
372
373 while (len--) {
374 *dst = dst[-2];
375 dst++;
376 }
377}
378
379static void fill24(uint8_t *dst, int len)
380{
381#if HAVE_BIGENDIAN0
382 uint32_t v = AV_RB24(dst - 3)((((const uint8_t*)(dst - 3))[0] << 16) | (((const uint8_t
*)(dst - 3))[1] << 8) | ((const uint8_t*)(dst - 3))[2]);
383 uint32_t a = v << 8 | v >> 16;
384 uint32_t b = v << 16 | v >> 8;
385 uint32_t c = v << 24 | v;
386#else
387 uint32_t v = AV_RL24(dst - 3)((((const uint8_t*)(dst - 3))[2] << 16) | (((const uint8_t
*)(dst - 3))[1] << 8) | ((const uint8_t*)(dst - 3))[0]);
388 uint32_t a = v | v << 24;
389 uint32_t b = v >> 8 | v << 16;
390 uint32_t c = v >> 16 | v << 8;
391#endif
392
393 while (len >= 12) {
394 AV_WN32(dst, a)((((union unaligned_32 *) (dst))->l) = (a));
395 AV_WN32(dst + 4, b)((((union unaligned_32 *) (dst + 4))->l) = (b));
396 AV_WN32(dst + 8, c)((((union unaligned_32 *) (dst + 8))->l) = (c));
397 dst += 12;
398 len -= 12;
399 }
400
401 if (len >= 4) {
402 AV_WN32(dst, a)((((union unaligned_32 *) (dst))->l) = (a));
403 dst += 4;
404 len -= 4;
405 }
406
407 if (len >= 4) {
408 AV_WN32(dst, b)((((union unaligned_32 *) (dst))->l) = (b));
409 dst += 4;
410 len -= 4;
411 }
412
413 while (len--) {
414 *dst = dst[-3];
415 dst++;
416 }
417}
418
419static void fill32(uint8_t *dst, int len)
420{
421 uint32_t v = AV_RN32(dst - 4)(((const union unaligned_32 *) (dst - 4))->l);
422
423#if HAVE_FAST_64BIT1
424 uint64_t v2= v + ((uint64_t)v<<32);
425 while (len >= 32) {
426 AV_WN64(dst , v2)((((union unaligned_64 *) (dst))->l) = (v2));
427 AV_WN64(dst+ 8, v2)((((union unaligned_64 *) (dst+ 8))->l) = (v2));
428 AV_WN64(dst+16, v2)((((union unaligned_64 *) (dst+16))->l) = (v2));
429 AV_WN64(dst+24, v2)((((union unaligned_64 *) (dst+24))->l) = (v2));
430 dst += 32;
431 len -= 32;
432 }
433#endif
434
435 while (len >= 4) {
436 AV_WN32(dst, v)((((union unaligned_32 *) (dst))->l) = (v));
437 dst += 4;
438 len -= 4;
439 }
440
441 while (len--) {
442 *dst = dst[-4];
443 dst++;
444 }
445}
446
447void av_memcpy_backptr(uint8_t *dst, int back, int cnt)
448{
449 const uint8_t *src = &dst[-back];
450 if (!back)
451 return;
452
453 if (back == 1) {
454 memset(dst, *src, cnt);
455 } else if (back == 2) {
456 fill16(dst, cnt);
457 } else if (back == 3) {
458 fill24(dst, cnt);
459 } else if (back == 4) {
460 fill32(dst, cnt);
461 } else {
462 if (cnt >= 16) {
463 int blocklen = back;
464 while (cnt > blocklen) {
465 memcpy(dst, src, blocklen);
466 dst += blocklen;
467 cnt -= blocklen;
468 blocklen <<= 1;
469 }
470 memcpy(dst, src, cnt);
471 return;
472 }
473 if (cnt >= 8) {
474 AV_COPY32U(dst, src)((((union unaligned_32 *) (dst))->l) = ((((const union unaligned_32
*) (src))->l)));;
475 AV_COPY32U(dst + 4, src + 4)((((union unaligned_32 *) (dst + 4))->l) = ((((const union
unaligned_32 *) (src + 4))->l)));;
476 src += 8;
477 dst += 8;
478 cnt -= 8;
479 }
480 if (cnt >= 4) {
481 AV_COPY32U(dst, src)((((union unaligned_32 *) (dst))->l) = ((((const union unaligned_32
*) (src))->l)));;
482 src += 4;
483 dst += 4;
484 cnt -= 4;
485 }
486 if (cnt >= 2) {
487 AV_COPY16U(dst, src)((((union unaligned_16 *) (dst))->l) = ((((const union unaligned_16
*) (src))->l)));;
488 src += 2;
489 dst += 2;
490 cnt -= 2;
491 }
492 if (cnt)
493 *dst = *src;
494 }
495}
496
497void *av_fast_realloc(void *ptr, unsigned int *size, size_t min_size)
498{
499 size_t max_size;
500
501 if (min_size <= *size)
502 return ptr;
503
504 max_size = atomic_load_explicit__c11_atomic_load(&max_alloc_size, memory_order_relaxed);
505 /* *size is an unsigned, so the real maximum is <= UINT_MAX. */
506 max_size = FFMIN(max_size, UINT_MAX)((max_size) > ((2147483647 *2U +1U)) ? ((2147483647 *2U +1U
)) : (max_size));
507
508 if (min_size > max_size) {
509 *size = 0;
510 return NULL((void*)0);
511 }
512
513 min_size = FFMIN(max_size, FFMAX(min_size + min_size / 16 + 32, min_size))((max_size) > (((min_size + min_size / 16 + 32) > (min_size
) ? (min_size + min_size / 16 + 32) : (min_size))) ? (((min_size
+ min_size / 16 + 32) > (min_size) ? (min_size + min_size
/ 16 + 32) : (min_size))) : (max_size));
514
515 ptr = av_realloc(ptr, min_size);
516 /* we could set this to the unmodified min_size but this is safer
517 * if the user lost the ptr and uses NULL now
518 */
519 if (!ptr)
520 min_size = 0;
521
522 *size = min_size;
523
524 return ptr;
525}
526
527static inline void fast_malloc(void *ptr, unsigned int *size, size_t min_size, int zero_realloc)
528{
529 size_t max_size;
530 void *val;
531
532 memcpy(&val, ptr, sizeof(val));
533 if (min_size <= *size) {
534 av_assert0(val || !min_size)do { if (!(val || !min_size)) { av_log(((void*)0), 0, "Assertion %s failed at %s:%d\n"
, "val || !min_size", "/root/firefox-clang/media/ffvpx/libavutil/mem.c"
, 534); abort(); } } while (0);
535 return;
536 }
537
538 max_size = atomic_load_explicit__c11_atomic_load(&max_alloc_size, memory_order_relaxed);
539 /* *size is an unsigned, so the real maximum is <= UINT_MAX. */
540 max_size = FFMIN(max_size, UINT_MAX)((max_size) > ((2147483647 *2U +1U)) ? ((2147483647 *2U +1U
)) : (max_size));
541
542 if (min_size > max_size) {
543 av_freep(ptr);
544 *size = 0;
545 return;
546 }
547 min_size = FFMIN(max_size, FFMAX(min_size + min_size / 16 + 32, min_size))((max_size) > (((min_size + min_size / 16 + 32) > (min_size
) ? (min_size + min_size / 16 + 32) : (min_size))) ? (((min_size
+ min_size / 16 + 32) > (min_size) ? (min_size + min_size
/ 16 + 32) : (min_size))) : (max_size));
548 av_freep(ptr);
549 val = zero_realloc ? av_mallocz(min_size) : av_malloc(min_size);
550 memcpy(ptr, &val, sizeof(val));
551 if (!val)
552 min_size = 0;
553 *size = min_size;
554 return;
555}
556
557void av_fast_malloc(void *ptr, unsigned int *size, size_t min_size)
558{
559 fast_malloc(ptr, size, min_size, 0);
560}
561
562void av_fast_mallocz(void *ptr, unsigned int *size, size_t min_size)
563{
564 fast_malloc(ptr, size, min_size, 1);
565}
566
567int av_size_mult(size_t a, size_t b, size_t *r)
568{
569 return size_mult(a, b, r);
570}