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Overview
| Comment: | On Windows, avoid casting a value larger than 2^31 to a (SIZE_T) on systems where it is a 32-bit type. |
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| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | mmap-size-limit |
| Files: | files | file ages | folders |
| SHA3-256: | f08d63b413601b22726e8b96ff8eb779857321b9df30db0333f71e50ffb5077d |
| User & Date: | mistachkin 2017-08-07 19:06:54 |
Context
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2017-08-07
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| 19:12 | Avoid casting a value larger than 2^31 to a (size_t) or (SIZE_T) on systems where it is a 32-bit type. check-in: b26d7a1c user: dan tags: trunk | |
| 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 | |
Changes
Changes to src/os_unix.c.
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i64 newLimit = *(i64*)pArg;
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;
|
| > |
3856 3857 3858 3859 3860 3861 3862 3863 3864 3865 3866 3867 3868 3869 3870 3871 |
i64 newLimit = *(i64*)pArg;
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 not at least a
** 64-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;
|
Changes to src/os_win.c.
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#if SQLITE_MAX_MMAP_SIZE>0
case SQLITE_FCNTL_MMAP_SIZE: {
i64 newLimit = *(i64*)pArg;
int rc = SQLITE_OK;
if( newLimit>sqlite3GlobalConfig.mxMmap ){
newLimit = sqlite3GlobalConfig.mxMmap;
}
*(i64*)pArg = pFile->mmapSizeMax;
if( newLimit>=0 && newLimit!=pFile->mmapSizeMax && pFile->nFetchOut==0 ){
pFile->mmapSizeMax = newLimit;
if( pFile->mmapSize>0 ){
winUnmapfile(pFile);
rc = winMapfile(pFile, -1);
}
|
> > > > > > > > |
3555 3556 3557 3558 3559 3560 3561 3562 3563 3564 3565 3566 3567 3568 3569 3570 3571 3572 3573 3574 3575 3576 |
#if SQLITE_MAX_MMAP_SIZE>0
case SQLITE_FCNTL_MMAP_SIZE: {
i64 newLimit = *(i64*)pArg;
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 MapViewOfFile(). Restrict its value to 2GB if (SIZE_T) is not at
** least a 64-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 ){
winUnmapfile(pFile);
rc = winMapfile(pFile, -1);
}
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