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Fix other potentiall pointer aliasing problems associated with subclassing

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of the sqlite3_file object for various VFS implementations.

FossilOrigin-Name: 270ac1a0f232d75537be40abae559004e950b992cb2c7e94cd6de66e96ae17bd
This commit is contained in:
drh
2020-07-24 09:17:42 +00:00
parent d9059bdb5b
commit 0c52f5a2b0
8 changed files with 20 additions and 1891 deletions
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2
ext/misc/appendvfs.c
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@@ -439,7 +439,7 @@ static int apndOpen(
p = (ApndFile*)pFile;
memset(p, 0, sizeof(*p));
pSubFile = ORIGFILE(pFile);
p->base.pMethods = &apnd_io_methods;
pFile->pMethods = &apnd_io_methods;
rc = pSubVfs->xOpen(pSubVfs, zName, pSubFile, flags, pOutFlags);
if( rc ) goto apnd_open_done;
rc = pSubFile->pMethods->xFileSize(pSubFile, &sz);

2
ext/misc/cksumvfs.c
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@@ -634,7 +634,7 @@ static int cksmOpen(
p = (CksmFile*)pFile;
memset(p, 0, sizeof(*p));
pSubFile = ORIGFILE(pFile);
p->base.pMethods = &cksm_io_methods;
pFile->pMethods = &cksm_io_methods;
rc = pSubVfs->xOpen(pSubVfs, zName, pSubFile, flags, pOutFlags);
if( rc ) goto cksm_open_done;
if( flags & SQLITE_OPEN_WAL ){

1895
manifest
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File diff suppressed because it is too large Load Diff

2
manifest.uuid
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@@ -1 +1 @@
892e9191dc8f805678a501db1993437ee99a1e1849496a0a24ceec9b84123257
270ac1a0f232d75537be40abae559004e950b992cb2c7e94cd6de66e96ae17bd

2
src/memdb.c
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@@ -339,7 +339,7 @@ static int memdbOpen(
p->mFlags = SQLITE_DESERIALIZE_RESIZEABLE | SQLITE_DESERIALIZE_FREEONCLOSE;
assert( pOutFlags!=0 ); /* True because flags==SQLITE_OPEN_MAIN_DB */
*pOutFlags = flags | SQLITE_OPEN_MEMORY;
p->base.pMethods = &memdb_io_methods;
pFile->pMethods = &memdb_io_methods;
p->szMax = sqlite3GlobalConfig.mxMemdbSize;
return SQLITE_OK;
}

2
src/os_unix.c
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@@ -5692,7 +5692,7 @@ static int fillInUnixFile(
if( rc!=SQLITE_OK ){
if( h>=0 ) robust_close(pNew, h, __LINE__);
}else{
pNew->pMethod = pLockingStyle;
pId->pMethods = pLockingStyle;
OpenCounter(+1);
verifyDbFile(pNew);
}

2
src/os_win.c
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@@ -5266,7 +5266,7 @@ static int winOpen(
}
sqlite3_free(zTmpname);
pFile->pMethod = pAppData ? pAppData->pMethod : &winIoMethod;
id->pMethods = pAppData ? pAppData->pMethod : &winIoMethod;
pFile->pVfs = pVfs;
pFile->h = h;
if( isReadonly ){

4
src/test_multiplex.c
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@@ -591,9 +591,9 @@ static int multiplexOpen(
if( rc==SQLITE_OK ){
if( pSubOpen->pMethods->iVersion==1 ){
pMultiplexOpen->base.pMethods = &gMultiplex.sIoMethodsV1;
pConn->pMethods = &gMultiplex.sIoMethodsV1;
}else{
pMultiplexOpen->base.pMethods = &gMultiplex.sIoMethodsV2;
pConn->pMethods = &gMultiplex.sIoMethodsV2;
}
}else{
multiplexFreeComponents(pGroup);