This has already been fixed, see
http://www.sqlite.org/cvstrac/tktview?tn=3603
Regards,
Vivien
2009/2/4 Brodie Thiesfield <brofie...@jellycan.com>
> Hi,
>
> I know that there has been a number of crashes involving
> journal_mode = off. This problem continues for me in
> sqlite 3.6.10 almalgamation though. A trigger seems to
> be the cause.
>
> The following test program crashes on the last line
> (sqlite3_step) with a NULL pointer dereference of
> id->pMethods when compiled on Windows with VC2003.
>
> sqlite.c line 12576
>
> SQLITE_PRIVATE int sqlite3OsWrite(sqlite3_file *id, const void *pBuf, int
> amt, i64 offset){
> DO_OS_MALLOC_TEST;
> return id->pMethods->xWrite(id, pBuf, amt, offset);
> }
>
> If the prop table and associated triggers are removed,
> the crash doesn't occur.
>
> Regards,
> Brodie
>
>
> The stack trace is:
>
> > testsqlite.exe!sqlite3OsWrite(sqlite3_file * id=0x00510b58, const
> void * pBuf=0x0012e3e4, int amt=4, __int64 offset=0) Line 12576 + 0x1b
> C
> testsqlite.exe!write32bits(sqlite3_file * fd=0x00510b58, __int64
> offset=0, unsigned int val=4) Line 31128 + 0x17 C
> testsqlite.exe!subjournalPage(PgHdr * pPg=0x00388a64) Line 33450 +
> 0x1b C
> testsqlite.exe!pager_write(PgHdr * pPg=0x00388a64) Line 34311 + 0x9
> C
> testsqlite.exe!sqlite3PagerWrite(PgHdr * pDbPage=0x00388a64) Line
> 34420 + 0x9 C
> testsqlite.exe!insertCell(MemPage * pPage=0x00388e88, int i=0,
> unsigned char * pCell=0x00388f20, int sz=9, unsigned char *
> pTemp=0x00000000, unsigned char nSkip=0) Line 40971 + 0xc C
> testsqlite.exe!sqlite3BtreeInsert(BtCursor * pCur=0x00385760, const
> void * pKey=0x0051d698, __int64 nKey=8, const void * pData=0x004f6c22, int
> nData=0, int nZero=0, int appendBias=0) Line 42175 + 0x19 C
> testsqlite.exe!sqlite3VdbeExec(Vdbe * p=0x00386808) Line 52819 +
> 0x2c C
> testsqlite.exe!sqlite3Step(Vdbe * p=0x00386808) Line 47849 + 0x9
> C
> testsqlite.exe!sqlite3_step(sqlite3_stmt * pStmt=0x00386808) Line
> 47916 + 0x9 C
> testsqlite.exe!main(int argc=1, unsigned short * * argv=0x00381d88)
> Line 48 + 0x9 C++
> testsqlite.exe!mainCRTStartup() Line 259 + 0x19 C
> kernel32.dll!7c817067()
> ntdll.dll!7c915d27()
>
>
> The test program is:
>
> #include <windows.h>
> #include <assert.h>
> #include <io.h>
> #include <stdio.h>
> #include "sqlite3.h"
>
> int main(int argc, TCHAR * argv[])
> {
> sqlite3 * pDatabase = NULL;
> char * pszError = NULL;
> sqlite3_stmt * pStatement = NULL;
>
> unlink("test.sqlite");
> unlink("test.sqlite-journal");
>
> assert(SQLITE_OK == sqlite3_open_v2("test.sqlite",
> &pDatabase, SQLITE_OPEN_READWRITE | SQLITE_OPEN_CREATE, NULL));
>
> assert(SQLITE_OK == sqlite3_exec(pDatabase,
> "CREATE TABLE dic ( entryid INTEGER PRIMARY KEY AUTOINCREMENT NOT
> NULL, headword TEXT NOT NULL, source TEXT NOT NULL ); "
> "CREATE INDEX dic_headword_idx ON dic ( headword ); "
> "CREATE TABLE prop ( pkey TEXT PRIMARY KEY NOT NULL, pval TEXT NOT
> NULL ); "
> "INSERT INTO prop(pkey, pval) VALUES ('total_count', 0); "
> "CREATE TRIGGER count_insert_trigger AFTER INSERT ON [dic] FOR EACH
> ROW BEGIN"
> " UPDATE prop SET pval = pval + 1 WHERE pkey = 'total_count'; "
> "END; "
> "CREATE TRIGGER count_delete_trigger AFTER DELETE ON [dic] FOR EACH
> ROW BEGIN"
> " UPDATE prop SET pval = pval - 1 WHERE pkey = 'total_count'; "
> "END; ",
> NULL, NULL, &pszError));
>
> assert(SQLITE_OK == sqlite3_close(pDatabase));
>
> assert(SQLITE_OK == sqlite3_open_v2("test.sqlite", &pDatabase,
> SQLITE_OPEN_READWRITE, NULL));
>
> assert(SQLITE_OK == sqlite3_exec(pDatabase,
> "PRAGMA journal_mode = OFF; "
> "BEGIN IMMEDIATE TRANSACTION; ",
> NULL, NULL, &pszError));
>
> assert(SQLITE_OK == sqlite3_prepare_v2(pDatabase,
> "INSERT INTO dic (entryid, headword, source) VALUES (?, ?, ?);", -1,
> &pStatement, NULL));
>
> assert(SQLITE_OK == sqlite3_bind_null(pStatement, 1));
> assert(SQLITE_OK == sqlite3_bind_text16(pStatement, 2, "foo", -1,
> NULL));
> assert(SQLITE_OK == sqlite3_bind_text16(pStatement, 3, "bar", -1,
> NULL));
>
> assert(SQLITE_DONE == sqlite3_step(pStatement)); // crash here
>
> return 0;
> }
>
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