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Add assert() statements to os_unix.c to check that the mutex is held when it should be. 

FossilOrigin-Name: 11a669b6537d6bac67764fd91a319234345ac504
This commit is contained in:
dan 2009-08-21 08:29:10 +00:00
parent 6085f5e0a0
commit 9359c7b7ab
3 changed files with 44 additions and 15 deletions
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14
manifest
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@ -1,5 +1,5 @@
C Updated\ssqlite3AtoF()\sthat\sperforms\sslightly\sbetter\swith\sGCC,\sand\ssignificantly\sbetter\swith\sMSVC.
D 2009-08-21T02:13:14
C Add\sassert()\sstatements\sto\sos_unix.c\sto\scheck\sthat\sthe\smutex\sis\sheld\swhen\sit\sshould\sbe.
D 2009-08-21T08:29:10
F Makefile.arm-wince-mingw32ce-gcc fcd5e9cd67fe88836360bb4f9ef4cb7f8e2fb5a0
F Makefile.in 73ddeec9dd10b85876c5c2ce1fdce627e1dcc7f8
F Makefile.linux-gcc d53183f4aa6a9192d249731c90dbdffbd2c68654
@ -145,7 +145,7 @@ F src/os.c 9fea283e336ee31caa4654d6cb05a129a1c42d2f
F src/os.h 00a1334a4eecee7f7bef79ac606b88d325119f21
F src/os_common.h 8c61457df58f1a4bd5f5adc3e90e01b37bf7afbc
F src/os_os2.c bed77dc26e3a95ce4a204936b9a1ca6fe612fcc5
F src/os_unix.c 6895098a9e7bd5630fab59060da6397bebcf2ff9
F src/os_unix.c 85f6ed28690a3c4546edaa25252d52761490aa33
F src/os_win.c 58bb163f327e79726dd119344d908e4d98483c3f
F src/pager.c a47be286477ed6c7b9a342dd53d4e4043f29d8c2
F src/pager.h 11852d044c86cf5a9d6e34171fb0c4fcf1f6265f
@ -747,7 +747,7 @@ F tool/speedtest2.tcl ee2149167303ba8e95af97873c575c3e0fab58ff
F tool/speedtest8.c 2902c46588c40b55661e471d7a86e4dd71a18224
F tool/speedtest8inst1.c 293327bc76823f473684d589a8160bde1f52c14e
F tool/vdbe-compress.tcl 672f81d693a03f80f5ae60bfefacd8a349e76746
P 3ba316e9a32de406a4390fb3f52fccb48da4da30
R bbc63800e202da4f72f0395afa840353
U shane
Z aada4480e610c2af2b7cf949ce420cab
P f084f5a8ba850de627ca8e9de6c81ab1ad9b7a1b
R 86b75a5cb6d64dfb1579ca1b08107e59
U dan
Z 23bb429f975133621e0fd91ccb484fc5

2
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@ -1 +1 @@
f084f5a8ba850de627ca8e9de6c81ab1ad9b7a1b
11a669b6537d6bac67764fd91a319234345ac504

33
src/os_unix.c
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@ -260,7 +260,18 @@ struct unixFile {
/*
** Helper functions to obtain and relinquish the global mutex.
** Helper functions to obtain and relinquish the global mutex. The
** global mutex is used to protect the unixOpenCnt, unixLockInfo and
** vxworksFileId objects used by this file, all of which may be
** shared by multiple threads.
**
** Function unixMutexHeld() is used to assert() that the global mutex
** is held when required. This function is only used as part of assert()
** statements. e.g.
**
** unixEnterMutex()
** assert( unixMutexHeld() );
** unixEnterLeave()
*/
static void unixEnterMutex(void){
sqlite3_mutex_enter(sqlite3MutexAlloc(SQLITE_MUTEX_STATIC_MASTER));
@ -268,6 +279,11 @@ static void unixEnterMutex(void){
static void unixLeaveMutex(void){
sqlite3_mutex_leave(sqlite3MutexAlloc(SQLITE_MUTEX_STATIC_MASTER));
}
#ifdef SQLITE_DEBUG
static int unixMutexHeld(void) {
return sqlite3_mutex_held(sqlite3MutexAlloc(SQLITE_MUTEX_STATIC_MASTER));
}
#endif
#ifdef SQLITE_DEBUG
@ -737,7 +753,7 @@ struct unixOpenCnt {
int nRef; /* Number of pointers to this structure */
int nLock; /* Number of outstanding locks */
int nPending; /* Number of pending close() operations */
int *aPending; /* Malloced space holding fd's awaiting a close() */
int *aPending; /* Malloced space holding fds awaiting close() */
#if OS_VXWORKS
sem_t *pSem; /* Named POSIX semaphore */
char aSemName[MAX_PATHNAME+1]; /* Name of that semaphore */
@ -848,8 +864,12 @@ static void testThreadLockingBehavior(int fd_orig){
/*
** Release a unixLockInfo structure previously allocated by findLockInfo().
**
** The mutex entered using the unixEnterMutex() function must be held
** when this function is called.
*/
static void releaseLockInfo(struct unixLockInfo *pLock){
assert( unixMutexHeld() );
if( pLock ){
pLock->nRef--;
if( pLock->nRef==0 ){
@ -871,8 +891,12 @@ static void releaseLockInfo(struct unixLockInfo *pLock){
/*
** Release a unixOpenCnt structure previously allocated by findLockInfo().
**
** The mutex entered using the unixEnterMutex() function must be held
** when this function is called.
*/
static void releaseOpenCnt(struct unixOpenCnt *pOpen){
assert( unixMutexHeld() );
if( pOpen ){
pOpen->nRef--;
if( pOpen->nRef==0 ){
@ -898,6 +922,9 @@ static void releaseOpenCnt(struct unixOpenCnt *pOpen){
** describes that file descriptor. Create new ones if necessary. The
** return values might be uninitialized if an error occurs.
**
** The mutex entered using the unixEnterMutex() function must be held
** when this function is called.
**
** Return an appropriate error code.
*/
static int findLockInfo(
@ -913,6 +940,8 @@ static int findLockInfo(
struct unixLockInfo *pLock = 0;/* Candidate unixLockInfo object */
struct unixOpenCnt *pOpen; /* Candidate unixOpenCnt object */
assert( unixMutexHeld() );
/* Get low-level information about the file that we can used to
** create a unique name for the file.
*/