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Overview
Comment: | Fix a problem with handling SQLITE_FCNTL_MMAP_SIZE requests with a negative parameter in os_unix.c. |
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Downloads: | Tarball | ZIP archive |
Timelines: | family | ancestors | descendants | both | mmap-size-limit |
Files: | files | file ages | folders |
SHA3-256: |
4249fcf7b0c0233f9b3ba5139702738d |
User & Date: | dan 2017-08-07 18:54:10.201 |
Context
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: f08d63b413 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: 4249fcf7b0 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: 7c8b6f1cac user: dan tags: mmap-size-limit) | |
Changes
Changes to src/os_unix.c.
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3857 3858 3859 3860 3861 3862 3863 | 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. */ | | | 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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