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Overview
| Comment: | Fix a problem with handling SQLITE_FCNTL_MMAP_SIZE requests with a negative parameter in os_unix.c. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | mmap-size-limit |
| Files: | files | file ages | folders |
| SHA3-256: |
4249fcf7b0c0233f9b3ba5139702738d |
| User & Date: | dan 2017-08-07 18:54:10 |
Context
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2017-08-07
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| 19:06 | On Windows, avoid casting a value larger than 2^31 to a (SIZE_T) on systems where it is a 32-bit type. (Leaf check-in: f08d63b4 user: mistachkin tags: mmap-size-limit) | |
| 18:54 | Fix a problem with handling SQLITE_FCNTL_MMAP_SIZE requests with a negative parameter in os_unix.c. (check-in: 4249fcf7 user: dan tags: mmap-size-limit) | |
| 18:27 | Update bigmmap.test to account for builds that use "-DSQLITE_MAX_MMAP_SIZE=<integer-constant>LL". (check-in: 7c8b6f1c user: dan tags: mmap-size-limit) | |
Changes
Changes to src/os_unix.c.
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int rc = SQLITE_OK;
if( newLimit>sqlite3GlobalConfig.mxMmap ){
newLimit = sqlite3GlobalConfig.mxMmap;
}
/* The value of newLimit may be eventually cast to (size_t) and passed
** to mmap(). Restrict its value to 2GB if (size_t) is a 32-bit type. */
if( sizeof(size_t)<8 ){
newLimit = (newLimit & 0x7FFFFFFF);
}
*(i64*)pArg = pFile->mmapSizeMax;
if( newLimit>=0 && newLimit!=pFile->mmapSizeMax && pFile->nFetchOut==0 ){
pFile->mmapSizeMax = newLimit;
if( pFile->mmapSize>0 ){
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3857 3858 3859 3860 3861 3862 3863 3864 3865 3866 3867 3868 3869 3870 3871 |
int rc = SQLITE_OK;
if( newLimit>sqlite3GlobalConfig.mxMmap ){
newLimit = sqlite3GlobalConfig.mxMmap;
}
/* The value of newLimit may be eventually cast to (size_t) and passed
** to mmap(). Restrict its value to 2GB if (size_t) is a 32-bit type. */
if( newLimit>0 && sizeof(size_t)<8 ){
newLimit = (newLimit & 0x7FFFFFFF);
}
*(i64*)pArg = pFile->mmapSizeMax;
if( newLimit>=0 && newLimit!=pFile->mmapSizeMax && pFile->nFetchOut==0 ){
pFile->mmapSizeMax = newLimit;
if( pFile->mmapSize>0 ){
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