Hi.
in sqlite3.3.8(latest)
./configure --prefix=/sw CFLAGS=-g CPPFLAGS=-g
1 thread : 1 db model
Error on many thread's request(about 1k/sec) to same db file.
This problem repeated sometimes.
I use sqlite3_commit_hook, sqlite3_rollback_hook, sqlite3_update_hook
and sqlite3_set_authorizer APIs.
------------------- source code ----------------------------------
void client_safe_exit( struct thread_t *self )
{
db_close( &self->db );
}
int db_close( struct db_t *db )
{
int result;
if ( db->opened == TRUE )
{
db_err_free( db );
/*XXXXXXXXXXX ERROR */
result = sqlite3_close( db->db );
db->opened = FALSE;
db->db = NULL;
return result;
}
return SQLITE_OK;
}
------------------- gdb back trace result ------------------------
sqlitedbms(21573,0x1820600) malloc: *** Deallocation of a pointer
not malloced: 0x50a0e1; This could be a double free(), or free()
called with the middle of an allocated block; Try setting environment
variable MallocHelp to see tools to help debug
Program received signal EXC_BAD_ACCESS, Could not access memory.
Reason: KERN_INVALID_ADDRESS at address: 0x3500000c
[Switching to process 21573 thread 0x3f7f]
0x00226aba in sqlite3_close (db=0x521670) at ./src/main.c:155
155 pNext = pFunc->pNext;
(gdb) q
The program is running. Exit anyway? (y or n) t^Hy^H^C
Please answer y or n.
The program is running. Exit anyway? (y or n) n
Not confirmed.
(gdb) bt
#0 0x00226aba in sqlite3_close (db=0x521670) at ./src/main.c:155
#1 0x00003996 in db_close (db=0x1811824) at libsqlite3.c:101
#2 0x000056c2 in client_safe_exit (self=0x1811600) at proc.c:706
#3 0x00005d12 in client (data=0x1811600) at proc.c:379
#4 0x90023d87 in _pthread_body ()
(gdb) bt full
#0 0x00226aba in sqlite3_close (db=0x521670) at ./src/main.c:155
pFunc = (FuncDef *) 0x35000000
pNext = (FuncDef *) 0x35000000
i = (HashElem *) 0x52aff0
j = 2
#1 0x00003996 in db_close (db=0x1811824) at libsqlite3.c:101
result = 889192448
db = (struct db_t *) 0x1811824
#2 0x000056c2 in client_safe_exit (self=0x1811600) at proc.c:706
self = (struct thread_t *) 0x1811600
#3 0x00005d12 in client (data=0x1811600) at proc.c:379
pollfd = {
fd = 16,
events = 27,
revents = 19
}
poll_res = 889192448
read_res = 889192448
auth_res = 889192448
db_res = 74352
result = 889192448
http_res = 889192448
data = (void *) 0x1811600
#4 0x90023d87 in _pthread_body ()
No symbol table info available.
(gdb)
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