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Overview
| Comment: | Reduce the randomness in the sqliteRandomSeed() routine in order to silence bogus errors from valgrind. Tickets #535 and #536. (CVS 1149) |
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| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: | cfe0acf9ec6c89f1e77b8be7dcc23029 |
| User & Date: | drh 2003-12-31 13:21:18 |
Context
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2003-12-31
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| 16:00 | Fix a bug (ticket #541) introduced by the previous check-in ((1149)). (CVS 1150) check-in: 64624400 user: drh tags: trunk | |
| 13:21 | Reduce the randomness in the sqliteRandomSeed() routine in order to silence bogus errors from valgrind. Tickets #535 and #536. (CVS 1149) check-in: cfe0acf9 user: drh tags: trunk | |
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2003-12-24
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| 01:41 | minor edits for new date.c with mingw/msys on Windows (CVS 1148) check-in: 9392c514 user: dougcurrie tags: trunk | |
Changes
Changes to src/os.c.
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/*
** Get information to seed the random number generator. The seed
** is written into the buffer zBuf[256]. The calling function must
** supply a sufficiently large buffer.
*/
int sqliteOsRandomSeed(char *zBuf){
#ifdef SQLITE_TEST
/* When testing, always use the same random number sequence.
** This makes the tests repeatable.
*/
memset(zBuf, 0, 256);
#endif
#if OS_UNIX && !defined(SQLITE_TEST)
int pid;
time((time_t*)zBuf);
pid = getpid();
memcpy(&zBuf[sizeof(time_t)], &pid, sizeof(pid));
#endif
#if OS_WIN && !defined(SQLITE_TEST)
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/*
** Get information to seed the random number generator. The seed
** is written into the buffer zBuf[256]. The calling function must
** supply a sufficiently large buffer.
*/
int sqliteOsRandomSeed(char *zBuf){
/* We have to initialize zBuf to prevent valgrind from reporting
** errors. The reports issued by valgrind are incorrect - we would
** prefer that the randomness be increased by making use of the
** uninitialized space in zBuf - but valgrind errors tend to worry
** some users. Rather than argue, it seems easier just to initialize
** the whole array and silence valgrind, even if that means less randomness
** in the random seed.
**
** When testing, initializing zBuf[] to zero is all we do. That means
** that we always use the same random number sequence.* This makes the
** tests repeatable.
*/
memset(zBuf, 0, 256);
#if OS_UNIX && !defined(SQLITE_TEST)
int pid;
time((time_t*)zBuf);
pid = getpid();
memcpy(&zBuf[sizeof(time_t)], &pid, sizeof(pid));
#endif
#if OS_WIN && !defined(SQLITE_TEST)
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