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Upgrade SQLite to 3.40 (#699)

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Paul Kulchenko 2022-11-28 12:54:48 -08:00 • committed by GitHub
parent bcae817215
commit 0dc0758574
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151 changed files with 27917 additions and 22169 deletions
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493
third_party/sqlite3/os_unix.c vendored
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@ -46,16 +46,9 @@
*/
#include "libc/stdio/rand.h"
#include "libc/sysv/consts/lock.h"
#include "libc/calls/struct/stat.h"
#include "libc/sysv/consts/s.h"
#include "libc/runtime/runtime.h"
#include "libc/calls/struct/timeval.h"
#include "third_party/sqlite3/sqlite3.h"
#include "third_party/sqlite3/mutex.internal.h"
#include "third_party/sqlite3/mutex.internal.h"
#include "third_party/sqlite3/sqliteInt.h"
#include "libc/sysv/consts/f.h"
#include "libc/dce.h"
#include "third_party/sqlite3/sqliteInt.inc"
#if SQLITE_OS_UNIX /* This file is used on unix only */
/*
@ -101,10 +94,14 @@
*/
#include "libc/calls/calls.h"
#include "libc/calls/struct/flock.h"
#include "libc/calls/struct/stat.h"
#include "libc/calls/struct/timeval.h"
#include "libc/calls/weirdtypes.h"
#include "libc/errno.h"
#include "libc/runtime/sysconf.h"
#include "libc/runtime/runtime.h"
#include "libc/sysv/consts/f.h"
#include "libc/sysv/consts/s.h"
#include "libc/sysv/consts/map.h"
#include "libc/sysv/consts/mremap.h"
#include "libc/sysv/consts/o.h"
@ -114,6 +111,16 @@
#include "libc/time/time.h"
#include "libc/mem/mem.h"
#if !defined(SQLITE_OMIT_WAL) || SQLITE_MAX_MMAP_SIZE>0
#include "libc/isystem/sys/mman.h"
#endif
#if SQLITE_ENABLE_LOCKING_STYLE
# include "libc/isystem/sys/ioctl.h"
# include "libc/isystem/sys/file.h"
# include "libc/isystem/sys/param.h"
#endif /* SQLITE_ENABLE_LOCKING_STYLE */
/*
** Try to determine if gethostuuid() is available based on standard
** macros. This might sometimes compute the wrong value for some
@ -143,14 +150,13 @@
#if OS_VXWORKS
#include <semaphore.h>
#include <sys/ioctl.h>
#include "libc/limits.h"
# include <sys/ioctl.h>
# include <semaphore.h>
# include "libc/limits.h"
#endif /* OS_VXWORKS */
#ifdef HAVE_UTIME
#include "libc/time/time.h"
# include "libc/time/time.h"
#endif
/*
@ -296,7 +302,7 @@ static pid_t randomnessPid = 0;
/*
** Include code that is common to all os_*.c files
*/
#include "third_party/sqlite3/os_common.inc"
#include "os_common.h"
/*
** Define various macros that are missing from some systems.
@ -854,20 +860,20 @@ static int robust_ftruncate(int h, sqlite3_int64 sz){
** should handle ENOLCK, ENOTSUP, EOPNOTSUPP separately.
*/
static int sqliteErrorFromPosixError(int posixError, int sqliteIOErr) {
assert((sqliteIOErr == SQLITE_IOERR_LOCK) ||
(sqliteIOErr == SQLITE_IOERR_UNLOCK) ||
(sqliteIOErr == SQLITE_IOERR_RDLOCK) ||
(sqliteIOErr == SQLITE_IOERR_CHECKRESERVEDLOCK));
assert( (sqliteIOErr == SQLITE_IOERR_LOCK) ||
(sqliteIOErr == SQLITE_IOERR_UNLOCK) ||
(sqliteIOErr == SQLITE_IOERR_RDLOCK) ||
(sqliteIOErr == SQLITE_IOERR_CHECKRESERVEDLOCK) );
// changed switch to if-else
if (posixError == EACCES || posixError == EAGAIN || posixError == ETIMEDOUT ||
posixError == EBUSY || posixError == EINTR || posixError == ENOLCK)
/* random NFS retry error, unless during file system support
/* random NFS retry error, unless during file system support
* introspection, in which it actually means what it says */
return SQLITE_BUSY;
else if (posixError == EPERM)
return SQLITE_PERM;
else
return sqliteIOErr;
}
@ -3541,6 +3547,16 @@ int sqlite3_sync_count = 0;
int sqlite3_fullsync_count = 0;
#endif
/*
** We do not trust systems to provide a working fdatasync(). Some do.
** Others do no. To be safe, we will stick with the (slightly slower)
** fsync(). If you know that your system does support fdatasync() correctly,
** then simply compile with -Dfdatasync=fdatasync or -DHAVE_FDATASYNC
*/
#if !defined(fdatasync) && !HAVE_FDATASYNC
# define fdatasync fsync
#endif
/*
** Define HAVE_FULLFSYNC to 0 or 1 depending on whether or not
** the F_FULLFSYNC macro is defined. F_FULLFSYNC is currently
@ -3936,6 +3952,9 @@ static void unixModeBit(unixFile *pFile, unsigned char mask, int *pArg){
/* Forward declaration */
static int unixGetTempname(int nBuf, char *zBuf);
#ifndef SQLITE_OMIT_WAL
static int unixFcntlExternalReader(unixFile*, int*);
#endif
/*
** Information and control of an open file handle.
@ -4052,6 +4071,15 @@ static int unixFileControl(sqlite3_file *id, int op, void *pArg){
return proxyFileControl(id,op,pArg);
}
#endif /* SQLITE_ENABLE_LOCKING_STYLE && defined(__APPLE__) */
case SQLITE_FCNTL_EXTERNAL_READER: {
#ifndef SQLITE_OMIT_WAL
return unixFcntlExternalReader((unixFile*)id, (int*)pArg);
#else
*(int*)pArg = 0;
return SQLITE_OK;
#endif
}
}
return SQLITE_NOTFOUND;
}
@ -4297,6 +4325,40 @@ struct unixShm {
#define UNIX_SHM_BASE ((22+SQLITE_SHM_NLOCK)*4) /* first lock byte */
#define UNIX_SHM_DMS (UNIX_SHM_BASE+SQLITE_SHM_NLOCK) /* deadman switch */
/*
** Use F_GETLK to check whether or not there are any readers with open
** wal-mode transactions in other processes on database file pFile. If
** no error occurs, return SQLITE_OK and set (*piOut) to 1 if there are
** such transactions, or 0 otherwise. If an error occurs, return an
** SQLite error code. The final value of *piOut is undefined in this
** case.
*/
static int unixFcntlExternalReader(unixFile *pFile, int *piOut){
int rc = SQLITE_OK;
*piOut = 0;
if( pFile->pShm){
unixShmNode *pShmNode = pFile->pShm->pShmNode;
struct flock f;
memset(&f, 0, sizeof(f));
f.l_type = F_WRLCK;
f.l_whence = SEEK_SET;
f.l_start = UNIX_SHM_BASE + 3;
f.l_len = SQLITE_SHM_NLOCK - 3;
sqlite3_mutex_enter(pShmNode->pShmMutex);
if( osFcntl(pShmNode->hShm, F_GETLK, &f)<0 ){
rc = SQLITE_IOERR_LOCK;
}else{
*piOut = (f.l_type!=F_UNLCK);
}
sqlite3_mutex_leave(pShmNode->pShmMutex);
}
return rc;
}
/*
** Apply posix advisory locks for all bytes from ofst through ofst+n-1.
**
@ -4849,11 +4911,17 @@ static int unixShmLock(
int flags /* What to do with the lock */
){
unixFile *pDbFd = (unixFile*)fd; /* Connection holding shared memory */
unixShm *p = pDbFd->pShm; /* The shared memory being locked */
unixShmNode *pShmNode = p->pShmNode; /* The underlying file iNode */
unixShm *p; /* The shared memory being locked */
unixShmNode *pShmNode; /* The underlying file iNode */
int rc = SQLITE_OK; /* Result code */
u16 mask; /* Mask of locks to take or release */
int *aLock = pShmNode->aLock;
int *aLock;
p = pDbFd->pShm;
if( p==0 ) return SQLITE_IOERR_SHMLOCK;
pShmNode = p->pShmNode;
if( NEVER(pShmNode==0) ) return SQLITE_IOERR_SHMLOCK;
aLock = pShmNode->aLock;
assert( pShmNode==pDbFd->pInode->pShmNode );
assert( pShmNode->pInode==pDbFd->pInode );
@ -5737,25 +5805,35 @@ static int fillInUnixFile(
return rc;
}
/*
** Directories to consider for temp files.
*/
static const char *azTempDirs[] = {
0,
0,
"/var/tmp",
"/usr/tmp",
"/tmp",
"."
};
/*
** Initialize first two members of azTempDirs[] array.
*/
static void unixTempFileInit(void){
azTempDirs[0] = getenv("SQLITE_TMPDIR");
azTempDirs[1] = getenv("TMPDIR");
}
/*
** Return the name of a directory in which to put temporary files.
** If no suitable temporary file directory can be found, return NULL.
*/
static const char *unixTempFileDir(void){
static const char *azDirs[] = {
0,
0,
"/var/tmp",
"/usr/tmp",
"/tmp",
"."
};
unsigned int i = 0;
struct stat buf;
const char *zDir = sqlite3_temp_directory;
if( !azDirs[0] ) azDirs[0] = getenv("SQLITE_TMPDIR");
if( !azDirs[1] ) azDirs[1] = getenv("TMPDIR");
while(1){
if( zDir!=0
&& osStat(zDir, &buf)==0
@ -5764,8 +5842,8 @@ static const char *unixTempFileDir(void){
){
return zDir;
}
if( i>=sizeof(azDirs)/sizeof(azDirs[0]) ) break;
zDir = azDirs[i++];
if( i>=sizeof(azTempDirs)/sizeof(azTempDirs[0]) ) break;
zDir = azTempDirs[i++];
}
return 0;
}
@ -5778,6 +5856,7 @@ static const char *unixTempFileDir(void){
static int unixGetTempname(int nBuf, char *zBuf){
const char *zDir;
int iLimit = 0;
int rc = SQLITE_OK;
int e = errno; // [jart] don't pollute strace logs
/* It's odd to simulate an io-error here, but really this is just
@ -5787,19 +5866,27 @@ static int unixGetTempname(int nBuf, char *zBuf){
zBuf[0] = 0;
SimulateIOError( return SQLITE_IOERR );
sqlite3_mutex_enter(sqlite3MutexAlloc(SQLITE_MUTEX_STATIC_TEMPDIR));
zDir = unixTempFileDir();
if( zDir==0 ) return SQLITE_IOERR_GETTEMPPATH;
do{
u64 r;
sqlite3_randomness(sizeof(r), &r);
assert( nBuf>2 );
zBuf[nBuf-2] = 0;
sqlite3_snprintf(nBuf, zBuf, "%s/"SQLITE_TEMP_FILE_PREFIX"%llx%c",
zDir, r, 0);
if( zBuf[nBuf-2]!=0 || (iLimit++)>10 ) return SQLITE_ERROR;
}while( osAccess(zBuf,0)==0 );
if( zDir==0 ){
rc = SQLITE_IOERR_GETTEMPPATH;
}else{
do{
u64 r;
sqlite3_randomness(sizeof(r), &r);
assert( nBuf>2 );
zBuf[nBuf-2] = 0;
sqlite3_snprintf(nBuf, zBuf, "%s/"SQLITE_TEMP_FILE_PREFIX"%llx%c",
zDir, r, 0);
if( zBuf[nBuf-2]!=0 || (iLimit++)>10 ){
rc = SQLITE_ERROR;
break;
}
}while( osAccess(zBuf,0)==0 );
}
sqlite3_mutex_leave(sqlite3MutexAlloc(SQLITE_MUTEX_STATIC_TEMPDIR));
errno = e; // [jart] don't pollute strace logs
return SQLITE_OK;
return rc;
}
#if SQLITE_ENABLE_LOCKING_STYLE && defined(__APPLE__)
@ -5942,20 +6029,23 @@ static int findCreateFileMode(
**
** where NN is a decimal number. The NN naming schemes are
** used by the test_multiplex.c module.
**
** In normal operation, the journal file name will always contain
** a '-' character. However in 8+3 filename mode, or if a corrupt
** rollback journal specifies a super-journal with a goofy name, then
** the '-' might be missing or the '-' might be the first character in
** the filename. In that case, just return SQLITE_OK with *pMode==0.
*/
nDb = sqlite3Strlen30(zPath) - 1;
while( zPath[nDb]!='-' ){
/* In normal operation, the journal file name will always contain
** a '-' character. However in 8+3 filename mode, or if a corrupt
** rollback journal specifies a super-journal with a goofy name, then
** the '-' might be missing. */
if( nDb==0 || zPath[nDb]=='.' ) return SQLITE_OK;
nDb = sqlite3Strlen30(zPath) - 1;
while( nDb>0 && zPath[nDb]!='.' ){
if( zPath[nDb]=='-' ){
memcpy(zDb, zPath, nDb);
zDb[nDb] = '\0';
rc = getFileMode(zDb, pMode, pUid, pGid);
break;
}
nDb--;
}
memcpy(zDb, zPath, nDb);
zDb[nDb] = '\0';
rc = getFileMode(zDb, pMode, pUid, pGid);
}else if( flags & SQLITE_OPEN_DELETEONCLOSE ){
*pMode = 0600;
}else if( flags & SQLITE_OPEN_URI ){
@ -6073,6 +6163,11 @@ static int unixOpen(
}
bzero(p, sizeof(unixFile));
#ifdef SQLITE_ASSERT_NO_FILES
/* Applications that never read or write a persistent disk files */
assert( zName==0 );
#endif
if( eType==SQLITE_OPEN_MAIN_DB ){
UnixUnusedFd *pUnused;
pUnused = findReusableFd(zName, flags);
@ -6342,86 +6437,99 @@ static int unixAccess(
}
/*
** If the last component of the pathname in z[0]..z[j-1] is something
** other than ".." then back it out and return true. If the last
** component is empty or if it is ".." then return false.
** A pathname under construction
*/
static int unixBackupDir(const char *z, int *pJ){
int j = *pJ;
int i;
if( j<=0 ) return 0;
for(i=j-1; i>0 && z[i-1]!='/'; i--){}
if( i==0 ) return 0;
if( z[i]=='.' && i==j-2 && z[i+1]=='.' ) return 0;
*pJ = i-1;
return 1;
typedef struct DbPath DbPath;
struct DbPath {
int rc; /* Non-zero following any error */
int nSymlink; /* Number of symlinks resolved */
char *zOut; /* Write the pathname here */
int nOut; /* Bytes of space available to zOut[] */
int nUsed; /* Bytes of zOut[] currently being used */
};
/* Forward reference */
static void appendAllPathElements(DbPath*,const char*);
/*
** Append a single path element to the DbPath under construction
*/
static void appendOnePathElement(
DbPath *pPath, /* Path under construction, to which to append zName */
const char *zName, /* Name to append to pPath. Not zero-terminated */
int nName /* Number of significant bytes in zName */
){
assert( nName>0 );
assert( zName!=0 );
if( zName[0]=='.' ){
if( nName==1 ) return;
if( zName[1]=='.' && nName==2 ){
if( pPath->nUsed<=1 ){
pPath->rc = SQLITE_ERROR;
return;
}
assert( pPath->zOut[0]=='/' );
while( pPath->zOut[--pPath->nUsed]!='/' ){}
return;
}
}
if( pPath->nUsed + nName + 2 >= pPath->nOut ){
pPath->rc = SQLITE_ERROR;
return;
}
pPath->zOut[pPath->nUsed++] = '/';
memcpy(&pPath->zOut[pPath->nUsed], zName, nName);
pPath->nUsed += nName;
#if defined(HAVE_READLINK) && defined(HAVE_LSTAT)
if( pPath->rc==SQLITE_OK ){
const char *zIn;
struct stat buf;
pPath->zOut[pPath->nUsed] = 0;
zIn = pPath->zOut;
if( osLstat(zIn, &buf)!=0 ){
if( errno!=ENOENT ){
pPath->rc = unixLogError(SQLITE_CANTOPEN_BKPT, "lstat", zIn);
}
}else if( S_ISLNK(buf.st_mode) ){
ssize_t got;
char zLnk[SQLITE_MAX_PATHLEN+2];
if( pPath->nSymlink++ > SQLITE_MAX_SYMLINK ){
pPath->rc = SQLITE_CANTOPEN_BKPT;
return;
}
got = osReadlink(zIn, zLnk, sizeof(zLnk)-2);
if( got<=0 || got>=(ssize_t)sizeof(zLnk)-2 ){
pPath->rc = unixLogError(SQLITE_CANTOPEN_BKPT, "readlink", zIn);
return;
}
zLnk[got] = 0;
if( zLnk[0]=='/' ){
pPath->nUsed = 0;
}else{
pPath->nUsed -= nName + 1;
}
appendAllPathElements(pPath, zLnk);
}
}
#endif
}
/*
** Convert a relative pathname into a full pathname. Also
** simplify the pathname as follows:
**
** Remove all instances of /./
** Remove all isntances of /X/../ for any X
** Append all path elements in zPath to the DbPath under construction.
*/
static int mkFullPathname(
const char *zPath, /* Input path */
char *zOut, /* Output buffer */
int nOut /* Allocated size of buffer zOut */
static void appendAllPathElements(
DbPath *pPath, /* Path under construction, to which to append zName */
const char *zPath /* Path to append to pPath. Is zero-terminated */
){
int nPath = sqlite3Strlen30(zPath);
int iOff = 0;
int i, j;
if( zPath[0]!='/' ){
if( osGetcwd(zOut, nOut-2)==0 ){
return unixLogError(SQLITE_CANTOPEN_BKPT, "getcwd", zPath);
int i = 0;
int j = 0;
do{
while( zPath[i] && zPath[i]!='/' ){ i++; }
if( i>j ){
appendOnePathElement(pPath, &zPath[j], i-j);
}
iOff = sqlite3Strlen30(zOut);
zOut[iOff++] = '/';
}
if( (iOff+nPath+1)>nOut ){
/* SQLite assumes that xFullPathname() nul-terminates the output buffer
** even if it returns an error. */
zOut[iOff] = '\0';
return SQLITE_CANTOPEN_BKPT;
}
sqlite3_snprintf(nOut-iOff, &zOut[iOff], "%s", zPath);
/* Remove duplicate '/' characters. Except, two // at the beginning
** of a pathname is allowed since this is important on windows. */
for(i=j=1; zOut[i]; i++){
zOut[j++] = zOut[i];
while( zOut[i]=='/' && zOut[i+1]=='/' ) i++;
}
zOut[j] = 0;
assert( zOut[0]=='/' );
for(i=j=0; zOut[i]; i++){
if( zOut[i]=='/' ){
/* Skip over internal "/." directory components */
if( zOut[i+1]=='.' && zOut[i+2]=='/' ){
i += 1;
continue;
}
/* If this is a "/.." directory component then back out the
** previous term of the directory if it is something other than "..".
*/
if( zOut[i+1]=='.'
&& zOut[i+2]=='.'
&& zOut[i+3]=='/'
&& unixBackupDir(zOut, &j)
){
i += 2;
continue;
}
}
if( ALWAYS(j>=0) ) zOut[j] = zOut[i];
j++;
}
if( NEVER(j==0) ) zOut[j++] = '/';
zOut[j] = 0;
return SQLITE_OK;
j = i+1;
}while( zPath[i++] );
}
/*
@ -6439,86 +6547,27 @@ static int unixFullPathname(
int nOut, /* Size of output buffer in bytes */
char *zOut /* Output buffer */
){
#if !defined(HAVE_READLINK) || !defined(HAVE_LSTAT)
return mkFullPathname(zPath, zOut, nOut);
#else
int rc = SQLITE_OK;
int nByte;
int nLink = 0; /* Number of symbolic links followed so far */
const char *zIn = zPath; /* Input path for each iteration of loop */
char *zDel = 0;
assert( pVfs->mxPathname==MAX_PATHNAME );
DbPath path;
UNUSED_PARAMETER(pVfs);
/* It's odd to simulate an io-error here, but really this is just
** using the io-error infrastructure to test that SQLite handles this
** function failing. This function could fail if, for example, the
** current working directory has been unlinked.
*/
SimulateIOError( return SQLITE_ERROR );
do {
/* Call stat() on path zIn. Set bLink to true if the path is a symbolic
** link, or false otherwise. */
int bLink = 0;
struct stat buf;
if( osLstat(zIn, &buf)!=0 ){
if( errno!=ENOENT ){
rc = unixLogError(SQLITE_CANTOPEN_BKPT, "lstat", zIn);
}
}else{
bLink = S_ISLNK(buf.st_mode);
path.rc = 0;
path.nUsed = 0;
path.nSymlink = 0;
path.nOut = nOut;
path.zOut = zOut;
if( zPath[0]!='/' ){
char zPwd[SQLITE_MAX_PATHLEN+2];
if( osGetcwd(zPwd, sizeof(zPwd)-2)==0 ){
return unixLogError(SQLITE_CANTOPEN_BKPT, "getcwd", zPath);
}
if( bLink ){
nLink++;
if( zDel==0 ){
zDel = sqlite3_malloc(nOut);
if( zDel==0 ) rc = SQLITE_NOMEM_BKPT;
}else if( nLink>=SQLITE_MAX_SYMLINKS ){
rc = SQLITE_CANTOPEN_BKPT;
}
if( rc==SQLITE_OK ){
nByte = osReadlink(zIn, zDel, nOut-1);
if( nByte<0 ){
rc = unixLogError(SQLITE_CANTOPEN_BKPT, "readlink", zIn);
}else{
if( zDel[0]!='/' ){
int n;
for(n = sqlite3Strlen30(zIn); n>0 && zIn[n-1]!='/'; n--);
if( nByte+n+1>nOut ){
rc = SQLITE_CANTOPEN_BKPT;
}else{
memmove(&zDel[n], zDel, nByte+1);
memcpy(zDel, zIn, n);
nByte += n;
}
}
zDel[nByte] = '\0';
}
}
zIn = zDel;
}
assert( rc!=SQLITE_OK || zIn!=zOut || zIn[0]=='/' );
if( rc==SQLITE_OK && zIn!=zOut ){
rc = mkFullPathname(zIn, zOut, nOut);
}
if( bLink==0 ) break;
zIn = zOut;
}while( rc==SQLITE_OK );
sqlite3_free(zDel);
if( rc==SQLITE_OK && nLink ) rc = SQLITE_OK_SYMLINK;
return rc;
#endif /* HAVE_READLINK && HAVE_LSTAT */
appendAllPathElements(&path, zPwd);
}
appendAllPathElements(&path, zPath);
zOut[path.nUsed] = 0;
if( path.rc || path.nUsed<2 ) return SQLITE_CANTOPEN_BKPT;
if( path.nSymlink ) return SQLITE_OK_SYMLINK;
return SQLITE_OK;
}
#ifndef SQLITE_OMIT_LOAD_EXTENSION
/*
** Interfaces for opening a shared library, finding entry points
@ -7983,9 +8032,39 @@ int sqlite3_os_init(void){
/* Register all VFSes defined in the aVfs[] array */
for(i=0; i<(sizeof(aVfs)/sizeof(sqlite3_vfs)); i++){
#ifdef SQLITE_DEFAULT_UNIX_VFS
sqlite3_vfs_register(&aVfs[i],
0==strcmp(aVfs[i].zName,SQLITE_DEFAULT_UNIX_VFS));
#else
sqlite3_vfs_register(&aVfs[i], i==0);
#endif
}
#ifdef SQLITE_OS_KV_OPTIONAL
sqlite3KvvfsInit();
#endif
unixBigLock = sqlite3MutexAlloc(SQLITE_MUTEX_STATIC_VFS1);
#ifndef SQLITE_OMIT_WAL
/* Validate lock assumptions */
assert( SQLITE_SHM_NLOCK==8 ); /* Number of available locks */
assert( UNIX_SHM_BASE==120 ); /* Start of locking area */
/* Locks:
** WRITE UNIX_SHM_BASE 120
** CKPT UNIX_SHM_BASE+1 121
** RECOVER UNIX_SHM_BASE+2 122
** READ-0 UNIX_SHM_BASE+3 123
** READ-1 UNIX_SHM_BASE+4 124
** READ-2 UNIX_SHM_BASE+5 125
** READ-3 UNIX_SHM_BASE+6 126
** READ-4 UNIX_SHM_BASE+7 127
** DMS UNIX_SHM_BASE+8 128
*/
assert( UNIX_SHM_DMS==128 ); /* Byte offset of the deadman-switch */
#endif
/* Initialize temp file dir array. */
unixTempFileInit();
return SQLITE_OK;
}