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Add a test for the outcome of a process crash within an xWrite VFS method

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call.

FossilOrigin-Name: eb8718006cb23ba9304da5c30d19863d688495f0eaae3794c5ad870e481866f8
This commit is contained in:
dan
2017-07-22 20:12:31 +00:00
parent 4da30f8888
commit 33447e7793
6 changed files with 313 additions and 59 deletions
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218
src/test_devsym.c
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@@ -28,6 +28,7 @@
** Name used to identify this VFS.
*/
#define DEVSYM_VFS_NAME "devsym"
#define WRITECRASH_NAME "writecrash"
typedef struct devsym_file devsym_file;
struct devsym_file {
@@ -72,61 +73,13 @@ static int devsymRandomness(sqlite3_vfs*, int nByte, char *zOut);
static int devsymSleep(sqlite3_vfs*, int microseconds);
static int devsymCurrentTime(sqlite3_vfs*, double*);
static sqlite3_vfs devsym_vfs = {
2, /* iVersion */
sizeof(devsym_file), /* szOsFile */
DEVSYM_MAX_PATHNAME, /* mxPathname */
0, /* pNext */
DEVSYM_VFS_NAME, /* zName */
0, /* pAppData */
devsymOpen, /* xOpen */
devsymDelete, /* xDelete */
devsymAccess, /* xAccess */
devsymFullPathname, /* xFullPathname */
#ifndef SQLITE_OMIT_LOAD_EXTENSION
devsymDlOpen, /* xDlOpen */
devsymDlError, /* xDlError */
devsymDlSym, /* xDlSym */
devsymDlClose, /* xDlClose */
#else
0, /* xDlOpen */
0, /* xDlError */
0, /* xDlSym */
0, /* xDlClose */
#endif /* SQLITE_OMIT_LOAD_EXTENSION */
devsymRandomness, /* xRandomness */
devsymSleep, /* xSleep */
devsymCurrentTime, /* xCurrentTime */
0, /* xGetLastError */
0 /* xCurrentTimeInt64 */
};
static sqlite3_io_methods devsym_io_methods = {
2, /* iVersion */
devsymClose, /* xClose */
devsymRead, /* xRead */
devsymWrite, /* xWrite */
devsymTruncate, /* xTruncate */
devsymSync, /* xSync */
devsymFileSize, /* xFileSize */
devsymLock, /* xLock */
devsymUnlock, /* xUnlock */
devsymCheckReservedLock, /* xCheckReservedLock */
devsymFileControl, /* xFileControl */
devsymSectorSize, /* xSectorSize */
devsymDeviceCharacteristics, /* xDeviceCharacteristics */
devsymShmMap, /* xShmMap */
devsymShmLock, /* xShmLock */
devsymShmBarrier, /* xShmBarrier */
devsymShmUnmap /* xShmUnmap */
};
struct DevsymGlobal {
sqlite3_vfs *pVfs;
int iDeviceChar;
int iSectorSize;
int nWriteCrash;
};
struct DevsymGlobal g = {0, 0, 512};
struct DevsymGlobal g = {0, 0, 512, 0};
/*
** Close an devsym-file.
@@ -271,6 +224,26 @@ static int devsymOpen(
int flags,
int *pOutFlags
){
static sqlite3_io_methods devsym_io_methods = {
2, /* iVersion */
devsymClose, /* xClose */
devsymRead, /* xRead */
devsymWrite, /* xWrite */
devsymTruncate, /* xTruncate */
devsymSync, /* xSync */
devsymFileSize, /* xFileSize */
devsymLock, /* xLock */
devsymUnlock, /* xUnlock */
devsymCheckReservedLock, /* xCheckReservedLock */
devsymFileControl, /* xFileControl */
devsymSectorSize, /* xSectorSize */
devsymDeviceCharacteristics, /* xDeviceCharacteristics */
devsymShmMap, /* xShmMap */
devsymShmLock, /* xShmLock */
devsymShmBarrier, /* xShmBarrier */
devsymShmUnmap /* xShmUnmap */
};
int rc;
devsym_file *p = (devsym_file *)pFile;
p->pReal = (sqlite3_file *)&p[1];
@@ -372,6 +345,137 @@ static int devsymCurrentTime(sqlite3_vfs *pVfs, double *pTimeOut){
return g.pVfs->xCurrentTime(g.pVfs, pTimeOut);
}
/*
** Return the sector-size in bytes for an writecrash-file.
*/
static int writecrashSectorSize(sqlite3_file *pFile){
devsym_file *p = (devsym_file *)pFile;
return sqlite3OsSectorSize(p->pReal);
}
/*
** Return the device characteristic flags supported by an writecrash-file.
*/
static int writecrashDeviceCharacteristics(sqlite3_file *pFile){
devsym_file *p = (devsym_file *)pFile;
return sqlite3OsDeviceCharacteristics(p->pReal);
}
/*
** Write data to an writecrash-file.
*/
static int writecrashWrite(
sqlite3_file *pFile,
const void *zBuf,
int iAmt,
sqlite_int64 iOfst
){
devsym_file *p = (devsym_file *)pFile;
if( g.nWriteCrash>0 ){
g.nWriteCrash--;
if( g.nWriteCrash==0 ) abort();
}
return sqlite3OsWrite(p->pReal, zBuf, iAmt, iOfst);
}
/*
** Open an writecrash file handle.
*/
static int writecrashOpen(
sqlite3_vfs *pVfs,
const char *zName,
sqlite3_file *pFile,
int flags,
int *pOutFlags
){
static sqlite3_io_methods writecrash_io_methods = {
2, /* iVersion */
devsymClose, /* xClose */
devsymRead, /* xRead */
writecrashWrite, /* xWrite */
devsymTruncate, /* xTruncate */
devsymSync, /* xSync */
devsymFileSize, /* xFileSize */
devsymLock, /* xLock */
devsymUnlock, /* xUnlock */
devsymCheckReservedLock, /* xCheckReservedLock */
devsymFileControl, /* xFileControl */
writecrashSectorSize, /* xSectorSize */
writecrashDeviceCharacteristics, /* xDeviceCharacteristics */
devsymShmMap, /* xShmMap */
devsymShmLock, /* xShmLock */
devsymShmBarrier, /* xShmBarrier */
devsymShmUnmap /* xShmUnmap */
};
int rc;
devsym_file *p = (devsym_file *)pFile;
p->pReal = (sqlite3_file *)&p[1];
rc = sqlite3OsOpen(g.pVfs, zName, p->pReal, flags, pOutFlags);
if( p->pReal->pMethods ){
pFile->pMethods = &writecrash_io_methods;
}
return rc;
}
static sqlite3_vfs devsym_vfs = {
2, /* iVersion */
sizeof(devsym_file), /* szOsFile */
DEVSYM_MAX_PATHNAME, /* mxPathname */
0, /* pNext */
DEVSYM_VFS_NAME, /* zName */
0, /* pAppData */
devsymOpen, /* xOpen */
devsymDelete, /* xDelete */
devsymAccess, /* xAccess */
devsymFullPathname, /* xFullPathname */
#ifndef SQLITE_OMIT_LOAD_EXTENSION
devsymDlOpen, /* xDlOpen */
devsymDlError, /* xDlError */
devsymDlSym, /* xDlSym */
devsymDlClose, /* xDlClose */
#else
0, /* xDlOpen */
0, /* xDlError */
0, /* xDlSym */
0, /* xDlClose */
#endif /* SQLITE_OMIT_LOAD_EXTENSION */
devsymRandomness, /* xRandomness */
devsymSleep, /* xSleep */
devsymCurrentTime, /* xCurrentTime */
0, /* xGetLastError */
0 /* xCurrentTimeInt64 */
};
static sqlite3_vfs writecrash_vfs = {
2, /* iVersion */
sizeof(devsym_file), /* szOsFile */
DEVSYM_MAX_PATHNAME, /* mxPathname */
0, /* pNext */
WRITECRASH_NAME, /* zName */
0, /* pAppData */
writecrashOpen, /* xOpen */
devsymDelete, /* xDelete */
devsymAccess, /* xAccess */
devsymFullPathname, /* xFullPathname */
#ifndef SQLITE_OMIT_LOAD_EXTENSION
devsymDlOpen, /* xDlOpen */
devsymDlError, /* xDlError */
devsymDlSym, /* xDlSym */
devsymDlClose, /* xDlClose */
#else
0, /* xDlOpen */
0, /* xDlError */
0, /* xDlSym */
0, /* xDlClose */
#endif /* SQLITE_OMIT_LOAD_EXTENSION */
devsymRandomness, /* xRandomness */
devsymSleep, /* xSleep */
devsymCurrentTime, /* xCurrentTime */
0, /* xGetLastError */
0 /* xCurrentTimeInt64 */
};
/*
** This procedure registers the devsym vfs with SQLite. If the argument is
@@ -379,10 +483,13 @@ static int devsymCurrentTime(sqlite3_vfs *pVfs, double *pTimeOut){
** available function in this file.
*/
void devsym_register(int iDeviceChar, int iSectorSize){
if( g.pVfs==0 ){
g.pVfs = sqlite3_vfs_find(0);
devsym_vfs.szOsFile += g.pVfs->szOsFile;
writecrash_vfs.szOsFile += g.pVfs->szOsFile;
sqlite3_vfs_register(&devsym_vfs, 0);
sqlite3_vfs_register(&writecrash_vfs, 0);
}
if( iDeviceChar>=0 ){
g.iDeviceChar = iDeviceChar;
@@ -403,4 +510,15 @@ void devsym_unregister(){
g.iSectorSize = 0;
}
void devsym_crash_on_write(int nWrite){
if( g.pVfs==0 ){
g.pVfs = sqlite3_vfs_find(0);
devsym_vfs.szOsFile += g.pVfs->szOsFile;
writecrash_vfs.szOsFile += g.pVfs->szOsFile;
sqlite3_vfs_register(&devsym_vfs, 0);
sqlite3_vfs_register(&writecrash_vfs, 0);
}
g.nWriteCrash = nWrite;
}
#endif