Bug Summary

File:pr/Linux4.19_x86_64_gcc_glibc_PTH_64_DBG.OBJ/pr/tests/../../../pr/tests/bigfile.c
Warning:line 146, column 17
Value stored to 'keep' is never read

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 bigfile.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 -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=/var/lib/jenkins/workspace/nss-scan-build/nspr/Linux4.19_x86_64_gcc_glibc_PTH_64_DBG.OBJ/pr/tests -fcoverage-compilation-dir=/var/lib/jenkins/workspace/nss-scan-build/nspr/Linux4.19_x86_64_gcc_glibc_PTH_64_DBG.OBJ/pr/tests -resource-dir /usr/lib/llvm-18/lib/clang/18 -U NDEBUG -D DEBUG_jenkins -D PACKAGE_NAME="" -D PACKAGE_TARNAME="" -D PACKAGE_VERSION="" -D PACKAGE_STRING="" -D PACKAGE_BUGREPORT="" -D PACKAGE_URL="" -D DEBUG=1 -D HAVE_VISIBILITY_HIDDEN_ATTRIBUTE=1 -D HAVE_VISIBILITY_PRAGMA=1 -D XP_UNIX=1 -D _GNU_SOURCE=1 -D HAVE_FCNTL_FILE_LOCKING=1 -D HAVE_POINTER_LOCALTIME_R=1 -D LINUX=1 -D HAVE_DLADDR=1 -D HAVE_GETTID=1 -D HAVE_LCHOWN=1 -D HAVE_SETPRIORITY=1 -D HAVE_STRERROR=1 -D HAVE_SYSCALL=1 -D HAVE_SECURE_GETENV=1 -D _REENTRANT=1 -D FORCE_PR_LOG -D _PR_PTHREADS -U HAVE_CVAR_BUILT_ON_SEM -I /var/lib/jenkins/workspace/nss-scan-build/nss/../dist/Linux4.19_x86_64_gcc_glibc_PTH_64_DBG.OBJ/include -I ../../../pr/include -I ../../../pr/include/private -internal-isystem /usr/lib/llvm-18/lib/clang/18/include -internal-isystem /usr/local/include -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/14/../../../../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 -fno-inline -analyzer-output=html -analyzer-config stable-report-filename=true -faddrsig -D__GCC_HAVE_DWARF2_CFI_ASM=1 -o /tmp/scan-build-2024-05-18-082241-28900-1 -x c ../../../pr/tests/bigfile.c
1/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
2/* This Source Code Form is subject to the terms of the Mozilla Public
3 * License, v. 2.0. If a copy of the MPL was not distributed with this
4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
5
6#include "prio.h"
7#include "prmem.h"
8#include "prprf.h"
9#include "prinit.h"
10#include "prerror.h"
11#include "prthread.h"
12
13#include "plerror.h"
14#include "plgetopt.h"
15
16#define DEFAULT_COUNT10 10
17#define DEFAULT_FILESIZE1 1
18#define BUFFER_SIZE1000000 1000000
19
20typedef enum {v_silent, v_whisper, v_shout} Verbosity;
21static void Verbose(Verbosity, const char*, const char*, PRIntn);
22
23#define VERBOSE(_l, _m)Verbose(_l, _m, "../../../pr/tests/bigfile.c", 23) Verbose(_l, _m, __FILE__"../../../pr/tests/bigfile.c", __LINE__23)
24
25static PRIntn test_result = 2;
26static PRFileDesc *output = NULL((void*)0);
27static PRIntn verbose = v_silent;
28static PRIntn filesize = DEFAULT_FILESIZE1;
29
30static PRIntn Usage(void)
31{
32 PR_fprintf(output, "Bigfile test usage:\n");
33 PR_fprintf(output, ">bigfile [-G] [-d] [-v[*v]] [-s <n>] <filename>\n");
34 PR_fprintf(output, "\td\tdebug mode (equivalent to -vvv)\t(false)\n");
35 PR_fprintf(output, "\tv\tAdditional levels of output\t(none)\n");
36 PR_fprintf(output, "\tk\tKeep data file after exit\t(false)\n");
37 PR_fprintf(output, "\ts <n>\tFile size in megabytes\t\t(1 megabyte)\n");
38 PR_fprintf(output, "\t<filename>\tName of test file\t(none)\n");
39 return 2; /* nothing happened */
40} /* Usage */
41
42static PRStatus DeleteIfFound(const char *filename)
43{
44 PRStatus rv;
45 VERBOSE(v_shout, "Checking for existing file")Verbose(v_shout, "Checking for existing file", "../../../pr/tests/bigfile.c"
, 45);
46 rv = PR_Access(filename, PR_ACCESS_WRITE_OK);
47 if (PR_SUCCESS == rv)
48 {
49 VERBOSE(v_shout, "Deleting existing file")Verbose(v_shout, "Deleting existing file", "../../../pr/tests/bigfile.c"
, 49);
50 rv = PR_Delete(filename);
51 if (PR_FAILURE == rv) {
52 VERBOSE(v_shout, "Cannot delete big file")Verbose(v_shout, "Cannot delete big file", "../../../pr/tests/bigfile.c"
, 52);
53 }
54 }
55 else if (PR_FILE_NOT_FOUND_ERROR(-5950L) != PR_GetError()) {
56 VERBOSE(v_shout, "Cannot access big file")Verbose(v_shout, "Cannot access big file", "../../../pr/tests/bigfile.c"
, 56);
57 }
58 else {
59 rv = PR_SUCCESS;
60 }
61 return rv;
62} /* DeleteIfFound */
63
64static PRIntn Error(const char *msg, const char *filename)
65{
66 PRInt32 error = PR_GetError();
67 if (NULL((void*)0) != msg)
68 {
69 if (0 == error) {
70 PR_fprintf(output, msg);
71 }
72 else {
73 PL_FPrintError(output, msg);
74 }
75 }
76 (void)DeleteIfFound(filename);
77 if (v_shout == verbose) {
78 PR_Abort();
79 }
80 return 1;
81} /* Error */
82
83static void Verbose(
84 Verbosity level, const char *msg, const char *file, PRIntn line)
85{
86 if (level <= verbose) {
87 PR_fprintf(output, "[%s : %d]: %s\n", file, line, msg);
88 }
89} /* Verbose */
90
91static void PrintInfo(PRFileInfo64 *info, const char *filename)
92{
93 PRExplodedTime tm;
94 char ctime[40], mtime[40];
95 static const char *types[] = {"FILE", "DIRECTORY", "OTHER"};
96 PR_fprintf(
97 output, "[%s : %d]: File info for %s\n",
98 __FILE__"../../../pr/tests/bigfile.c", __LINE__98, filename);
99 PR_fprintf(
100 output, " type: %s, size: %llu bytes,\n",
101 types[info->type - 1], info->size);
102
103 PR_ExplodeTime(info->creationTime, PR_GMTParameters, &tm);
104 (void)PR_FormatTime(ctime, sizeof(ctime), "%c GMT", &tm);
105 PR_ExplodeTime(info->modifyTime, PR_GMTParameters, &tm);
106 (void)PR_FormatTime(mtime, sizeof(mtime), "%c GMT", &tm);
107
108 PR_fprintf(
109 output, " creation: %s,\n modify: %s\n", ctime, mtime);
110} /* PrintInfo */
111
112int main(int argc, char **argv)
113{
114 PRStatus rv;
115 char *buffer;
116 PLOptStatus os;
117 PRInt32 loop, bytes;
118 PRFileInfo small_info;
119 PRFileInfo64 big_info;
120 PRBool keep = PR_FALSE0;
121 PRFileDesc *file = NULL((void*)0);
122 const char *filename = NULL((void*)0);
123 PRIntn count = DEFAULT_COUNT10;
124 PRInt64 filesize64, big_answer, big_size, one_meg, zero_meg, big_fragment;
125 PRInt64 sevenFox = LL_INIT(0,0x7fffffff)((0L << 32) + 0x7fffffffL);
126
127 PLOptState *opt = PL_CreateOptState(argc, argv, "dtvhs:");
128
129 output = PR_GetSpecialFD(PR_StandardError);
130 PR_STDIO_INIT();
131
132 while (PL_OPT_EOL != (os = PL_GetNextOpt(opt)))
133 {
134 if (PL_OPT_BAD == os) {
135 continue;
136 }
137 switch (opt->option)
138 {
139 case 0:
140 filename = opt->value;
141 break;
142 case 'd': /* debug mode */
143 verbose = v_shout;
144 break;
145 case 'k': /* keep file */
146 keep = PR_TRUE1;
Value stored to 'keep' is never read
147 break;
148 case 'v': /* verbosity */
149 if (v_shout > verbose) {
150 verbose += 1;
151 }
152 break;
153 case 'c': /* loop counter */
154 count = atoi(opt->value);
155 break;
156 case 's': /* filesize */
157 filesize = atoi(opt->value);
158 break;
159 case 'h': /* confused */
160 default:
161 return Usage();
162 }
163 }
164 PL_DestroyOptState(opt);
165
166 if (0 == count) {
167 count = DEFAULT_COUNT10;
168 }
169 if (0 == filesize) {
170 filesize = DEFAULT_FILESIZE1;
171 }
172 if (NULL((void*)0) == filename)
173 {
174#define FILE_NAME"bigfile.dat" "bigfile.dat"
175 if (DEFAULT_FILESIZE1 != filesize) {
176 return Usage();
177 }
178 else {
179 filename = FILE_NAME"bigfile.dat";
180 }
181 }
182
183 if (PR_FAILURE == DeleteIfFound(filename)) {
184 return 1;
185 }
186
187 test_result = 0;
188
189 LL_I2L(zero_meg, 0)((zero_meg) = (PRInt64)(0));
190 LL_I2L(one_meg, 1000000)((one_meg) = (PRInt64)(1000000));
191 LL_I2L(filesize64, filesize)((filesize64) = (PRInt64)(filesize));
192 buffer = (char*)PR_MALLOC(BUFFER_SIZE)(PR_Malloc((1000000)));
193 LL_I2L(big_fragment, BUFFER_SIZE)((big_fragment) = (PRInt64)(1000000));
194 LL_MUL(filesize64, filesize64, one_meg)((filesize64) = (filesize64) * (one_meg));
195
196 for (loop = 0; loop < BUFFER_SIZE1000000; ++loop) {
197 buffer[loop] = (char)loop;
198 }
199
200 VERBOSE(v_whisper, "Creating big file")Verbose(v_whisper, "Creating big file", "../../../pr/tests/bigfile.c"
, 200);
201 file = PR_Open(filename, PR_CREATE_FILE0x08 | PR_WRONLY0x02, 0666);
202 if (NULL((void*)0) == file) {
203 return Error("PR_Open()", filename);
204 }
205
206 VERBOSE(v_whisper, "Testing available space in empty file")Verbose(v_whisper, "Testing available space in empty file", "../../../pr/tests/bigfile.c"
, 206);
207 big_answer = file->methods->available64(file);
208 if (!LL_IS_ZERO(big_answer)((big_answer) == 0)) {
209 return Error("empty available64()", filename);
210 }
211
212 LL_SUB(big_size, filesize64, one_meg)((big_size) = (filesize64) - (one_meg));
213 VERBOSE(v_whisper, "Creating sparse big file by seeking to end")Verbose(v_whisper, "Creating sparse big file by seeking to end"
, "../../../pr/tests/bigfile.c", 213);
214 big_answer = file->methods->seek64(file, big_size, PR_SEEK_SET);
215 if (!LL_EQ(big_answer, big_size)((big_answer) == (big_size))) {
216 return Error("seek", filename);
217 }
218
219 VERBOSE(v_whisper, "Writing block at end of sparse file")Verbose(v_whisper, "Writing block at end of sparse file", "../../../pr/tests/bigfile.c"
, 219);
220 bytes = file->methods->write(file, buffer, BUFFER_SIZE1000000);
221 if (bytes != BUFFER_SIZE1000000) {
222 return Error("write", filename);
223 }
224
225 VERBOSE(v_whisper, "Testing available space at end of sparse file")Verbose(v_whisper, "Testing available space at end of sparse file"
, "../../../pr/tests/bigfile.c", 225);
226 big_answer = file->methods->available64(file);
227 if (!LL_IS_ZERO(big_answer)((big_answer) == 0)) {
228 return Error("eof available64()", filename);
229 }
230
231 VERBOSE(v_whisper, "Getting big info on sparse big file")Verbose(v_whisper, "Getting big info on sparse big file", "../../../pr/tests/bigfile.c"
, 231);
232 rv = file->methods->fileInfo64(file, &big_info);
233 if (PR_FAILURE == rv) {
234 return Error("fileInfo64()", filename);
235 }
236 if (v_shout <= verbose) {
237 PrintInfo(&big_info, filename);
238 }
239
240 VERBOSE(v_whisper, "Getting small info on sparse big file")Verbose(v_whisper, "Getting small info on sparse big file", "../../../pr/tests/bigfile.c"
, 240);
241 rv = file->methods->fileInfo(file, &small_info);
242 if (LL_CMP(sevenFox, <, filesize64)((PRInt64)(sevenFox) < (PRInt64)(filesize64)) && (PR_SUCCESS == rv))
243 {
244 VERBOSE(v_whisper, "Should have failed and didn't")Verbose(v_whisper, "Should have failed and didn't", "../../../pr/tests/bigfile.c"
, 244);
245 return Error("fileInfo()", filename);
246 }
247 else if (LL_CMP(sevenFox, >, filesize64)((PRInt64)(sevenFox) > (PRInt64)(filesize64)) && (PR_FAILURE == rv))
248 {
249 VERBOSE(v_whisper, "Should have succeeded and didn't")Verbose(v_whisper, "Should have succeeded and didn't", "../../../pr/tests/bigfile.c"
, 249);
250 return Error("fileInfo()", filename);
251 }
252
253 VERBOSE(v_whisper, "Rewinding big file")Verbose(v_whisper, "Rewinding big file", "../../../pr/tests/bigfile.c"
, 253);
254 big_answer = file->methods->seek64(file, zero_meg, PR_SEEK_SET);
255 if (!LL_IS_ZERO(big_answer)((big_answer) == 0)) {
256 return Error("rewind seek64()", filename);
257 }
258
259 VERBOSE(v_whisper, "Establishing available space in rewound file")Verbose(v_whisper, "Establishing available space in rewound file"
, "../../../pr/tests/bigfile.c", 259);
260 big_answer = file->methods->available64(file);
261 if (LL_NE(filesize64, big_answer)((filesize64) != (big_answer))) {
262 return Error("bof available64()", filename);
263 }
264
265 VERBOSE(v_whisper, "Closing big file")Verbose(v_whisper, "Closing big file", "../../../pr/tests/bigfile.c"
, 265);
266 rv = file->methods->close(file);
267 if (PR_FAILURE == rv) {
268 return Error("close()", filename);
269 }
270
271 VERBOSE(v_whisper, "Reopening big file")Verbose(v_whisper, "Reopening big file", "../../../pr/tests/bigfile.c"
, 271);
272 file = PR_Open(filename, PR_RDWR0x04, 0666);
273 if (NULL((void*)0) == file) {
274 return Error("open failed", filename);
275 }
276
277 VERBOSE(v_whisper, "Checking available data in reopened file")Verbose(v_whisper, "Checking available data in reopened file"
, "../../../pr/tests/bigfile.c", 277);
278 big_answer = file->methods->available64(file);
279 if (LL_NE(filesize64, big_answer)((filesize64) != (big_answer))) {
280 return Error("reopened available64()", filename);
281 }
282
283 big_answer = zero_meg;
284 VERBOSE(v_whisper, "Rewriting every byte of big file data")Verbose(v_whisper, "Rewriting every byte of big file data", "../../../pr/tests/bigfile.c"
, 284);
285 do
286 {
287 bytes = file->methods->write(file, buffer, BUFFER_SIZE1000000);
288 if (bytes != BUFFER_SIZE1000000) {
289 return Error("write", filename);
290 }
291 LL_ADD(big_answer, big_answer, big_fragment)((big_answer) = (big_answer) + (big_fragment));
292 } while (LL_CMP(big_answer, <, filesize64)((PRInt64)(big_answer) < (PRInt64)(filesize64)));
293
294 VERBOSE(v_whisper, "Checking position at eof")Verbose(v_whisper, "Checking position at eof", "../../../pr/tests/bigfile.c"
, 294);
295 big_answer = file->methods->seek64(file, zero_meg, PR_SEEK_CUR);
296 if (LL_NE(big_answer, filesize64)((big_answer) != (filesize64))) {
297 return Error("file size error", filename);
298 }
299
300 VERBOSE(v_whisper, "Testing available space at eof")Verbose(v_whisper, "Testing available space at eof", "../../../pr/tests/bigfile.c"
, 300);
301 big_answer = file->methods->available64(file);
302 if (!LL_IS_ZERO(big_answer)((big_answer) == 0)) {
303 return Error("eof available64()", filename);
304 }
305
306 VERBOSE(v_whisper, "Rewinding full file")Verbose(v_whisper, "Rewinding full file", "../../../pr/tests/bigfile.c"
, 306);
307 big_answer = file->methods->seek64(file, zero_meg, PR_SEEK_SET);
308 if (!LL_IS_ZERO(big_answer)((big_answer) == 0)) {
309 return Error("bof seek64()", filename);
310 }
311
312 VERBOSE(v_whisper, "Testing available space in rewound file")Verbose(v_whisper, "Testing available space in rewound file",
"../../../pr/tests/bigfile.c", 312);
313 big_answer = file->methods->available64(file);
314 if (LL_NE(big_answer, filesize64)((big_answer) != (filesize64))) {
315 return Error("bof available64()", filename);
316 }
317
318 VERBOSE(v_whisper, "Seeking to end of big file")Verbose(v_whisper, "Seeking to end of big file", "../../../pr/tests/bigfile.c"
, 318);
319 big_answer = file->methods->seek64(file, filesize64, PR_SEEK_SET);
320 if (LL_NE(big_answer, filesize64)((big_answer) != (filesize64))) {
321 return Error("eof seek64()", filename);
322 }
323
324 VERBOSE(v_whisper, "Getting info on big file while it's open")Verbose(v_whisper, "Getting info on big file while it's open"
, "../../../pr/tests/bigfile.c", 324);
325 rv = file->methods->fileInfo64(file, &big_info);
326 if (PR_FAILURE == rv) {
327 return Error("fileInfo64()", filename);
328 }
329 if (v_shout <= verbose) {
330 PrintInfo(&big_info, filename);
331 }
332
333 VERBOSE(v_whisper, "Closing big file")Verbose(v_whisper, "Closing big file", "../../../pr/tests/bigfile.c"
, 333);
334 rv = file->methods->close(file);
335 if (PR_FAILURE == rv) {
336 return Error("close()", filename);
337 }
338
339 VERBOSE(v_whisper, "Getting info on big file after it's closed")Verbose(v_whisper, "Getting info on big file after it's closed"
, "../../../pr/tests/bigfile.c", 339);
340 rv = PR_GetFileInfo64(filename, &big_info);
341 if (PR_FAILURE == rv) {
342 return Error("fileInfo64()", filename);
343 }
344 if (v_shout <= verbose) {
345 PrintInfo(&big_info, filename);
346 }
347
348 VERBOSE(v_whisper, "Deleting big file")Verbose(v_whisper, "Deleting big file", "../../../pr/tests/bigfile.c"
, 348);
349 rv = PR_Delete(filename);
350 if (PR_FAILURE == rv) {
351 return Error("PR_Delete()", filename);
352 }
353
354 PR_DELETE(buffer){ PR_Free(buffer); (buffer) = ((void*)0); };
355 return test_result;
356} /* main */
357
358/* bigfile.c */