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sqlite/sqlite-3.6.12-memalign.patch

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---------------------
PatchSet 6171
Date: 2009/04/05 15:22:09
Author: drh
Branch: HEAD
Tag: (none)
Branches:
Log:
Additional code to make sure and to assert that memory allocations have
8-byte alignment. Ticket #3777.
Members:
src/btree.c:1.589->1.590
src/memjournal.c:1.10->1.11
src/pager.c:1.577->1.578
src/sqliteInt.h:1.850->1.851
src/vdbeaux.c:1.446->1.447
src/vdbemem.c:1.139->1.140
Index: sqlite/src/btree.c
diff -u sqlite/src/btree.c:1.589 sqlite/src/btree.c:1.590
--- sqlite/src/btree.c:1.589 Thu Apr 2 20:16:59 2009
+++ sqlite/src/btree.c Sun Apr 5 12:22:09 2009
@@ -5357,13 +5357,13 @@
}
szCell = (u16*)&apCell[nMaxCells];
aCopy[0] = (u8*)&szCell[nMaxCells];
- assert( ((aCopy[0] - (u8*)0) & 7)==0 ); /* 8-byte alignment required */
+ assert( EIGHT_BYTE_ALIGNMENT(aCopy[0]) );
for(i=1; i<NB; i++){
aCopy[i] = &aCopy[i-1][pBt->pageSize+ROUND8(sizeof(MemPage))];
assert( ((aCopy[i] - (u8*)0) & 7)==0 ); /* 8-byte alignment required */
}
aSpace1 = &aCopy[NB-1][pBt->pageSize+ROUND8(sizeof(MemPage))];
- assert( ((aSpace1 - (u8*)0) & 7)==0 ); /* 8-byte alignment required */
+ assert( EIGHT_BYTE_ALIGNMENT(aSpace1) );
if( ISAUTOVACUUM ){
aFrom = &aSpace1[pBt->pageSize];
}
Index: sqlite/src/memjournal.c
diff -u sqlite/src/memjournal.c:1.10 sqlite/src/memjournal.c:1.11
--- sqlite/src/memjournal.c:1.10 Thu Apr 2 17:22:42 2009
+++ sqlite/src/memjournal.c Sun Apr 5 12:22:09 2009
@@ -237,6 +237,7 @@
*/
void sqlite3MemJournalOpen(sqlite3_file *pJfd){
MemJournal *p = (MemJournal *)pJfd;
+ assert( EIGHT_BYTE_ALIGNMENT(p) );
memset(p, 0, sqlite3MemJournalSize());
p->pMethod = &MemJournalMethods;
}
Index: sqlite/src/pager.c
diff -u sqlite/src/pager.c:1.577 sqlite/src/pager.c:1.578
--- sqlite/src/pager.c:1.577 Sat Apr 4 15:53:48 2009
+++ sqlite/src/pager.c Sun Apr 5 12:22:09 2009
@@ -3114,9 +3114,9 @@
** source file journal.c).
*/
if( sqlite3JournalSize(pVfs)>sqlite3MemJournalSize() ){
- journalFileSize = sqlite3JournalSize(pVfs);
+ journalFileSize = ROUND8(sqlite3JournalSize(pVfs));
}else{
- journalFileSize = sqlite3MemJournalSize();
+ journalFileSize = ROUND8(sqlite3MemJournalSize());
}
/* Set the output variable to NULL in case an error occurs. */
@@ -3172,23 +3172,25 @@
** Journal file name (nPathname+8+1 bytes)
*/
pPtr = (u8 *)sqlite3MallocZero(
- sizeof(*pPager) + /* Pager structure */
- pcacheSize + /* PCache object */
- pVfs->szOsFile + /* The main db file */
- journalFileSize * 2 + /* The two journal files */
- nPathname + 1 + /* zFilename */
- nPathname + 8 + 1 /* zJournal */
+ ROUND8(sizeof(*pPager)) + /* Pager structure */
+ ROUND8(pcacheSize) + /* PCache object */
+ ROUND8(pVfs->szOsFile) + /* The main db file */
+ journalFileSize * 2 + /* The two journal files */
+ nPathname + 1 + /* zFilename */
+ nPathname + 8 + 1 /* zJournal */
);
+ assert( EIGHT_BYTE_ALIGNMENT(journalFileSize) );
if( !pPtr ){
sqlite3_free(zPathname);
return SQLITE_NOMEM;
}
pPager = (Pager*)(pPtr);
- pPager->pPCache = (PCache*)(pPtr += sizeof(*pPager));
- pPager->fd = (sqlite3_file*)(pPtr += pcacheSize);
- pPager->sjfd = (sqlite3_file*)(pPtr += pVfs->szOsFile);
+ pPager->pPCache = (PCache*)(pPtr += ROUND8(sizeof(*pPager)));
+ pPager->fd = (sqlite3_file*)(pPtr += ROUND8(pcacheSize));
+ pPager->sjfd = (sqlite3_file*)(pPtr += ROUND8(pVfs->szOsFile));
pPager->jfd = (sqlite3_file*)(pPtr += journalFileSize);
pPager->zFilename = (char*)(pPtr += journalFileSize);
+ assert( EIGHT_BYTE_ALIGNMENT(pPager->jfd) );
/* Fill in the Pager.zFilename and Pager.zJournal buffers, if required. */
if( zPathname ){
Index: sqlite/src/sqliteInt.h
diff -u sqlite/src/sqliteInt.h:1.850 sqlite/src/sqliteInt.h:1.851
--- sqlite/src/sqliteInt.h:1.850 Wed Apr 1 18:03:01 2009
+++ sqlite/src/sqliteInt.h Sun Apr 5 12:22:09 2009
@@ -456,6 +456,11 @@
#define ROUNDDOWN8(x) ((x)&~7)
/*
+** Assert that the pointer X is aligned to an 8-byte boundary.
+*/
+#define EIGHT_BYTE_ALIGNMENT(X) ((((char*)(X) - (char*)0)&7)==0)
+
+/*
** An instance of the following structure is used to store the busy-handler
** callback for a given sqlite handle.
**
Index: sqlite/src/vdbeaux.c
diff -u sqlite/src/vdbeaux.c:1.446 sqlite/src/vdbeaux.c:1.447
--- sqlite/src/vdbeaux.c:1.446 Wed Mar 25 15:43:09 2009
+++ sqlite/src/vdbeaux.c Sun Apr 5 12:22:09 2009
@@ -1023,6 +1023,7 @@
u8 *pEnd, /* Pointer to 1 byte past the end of *ppFrom buffer */
int *pnByte /* If allocation cannot be made, increment *pnByte */
){
+ assert( EIGHT_BYTE_ALIGNMENT(*ppFrom) );
if( (*(void**)pp)==0 ){
nByte = ROUND8(nByte);
if( (pEnd - *ppFrom)>=nByte ){
@@ -1096,6 +1097,8 @@
if( isExplain && nMem<10 ){
nMem = 10;
}
+ zCsr += (zCsr - (u8*)0)&7;
+ assert( EIGHT_BYTE_ALIGNMENT(zCsr) );
do {
memset(zCsr, 0, zEnd-zCsr);
Index: sqlite/src/vdbemem.c
diff -u sqlite/src/vdbemem.c:1.139 sqlite/src/vdbemem.c:1.140
--- sqlite/src/vdbemem.c:1.139 Sun Mar 29 15:12:10 2009
+++ sqlite/src/vdbemem.c Sun Apr 5 12:22:09 2009
@@ -209,6 +209,7 @@
assert( !(fg&(MEM_Str|MEM_Blob)) );
assert( fg&(MEM_Int|MEM_Real) );
assert( (pMem->flags&MEM_RowSet)==0 );
+ assert( EIGHT_BYTE_ALIGNMENT(pMem) );
if( sqlite3VdbeMemGrow(pMem, nByte, 0) ){
@@ -345,6 +346,7 @@
i64 sqlite3VdbeIntValue(Mem *pMem){
int flags;
assert( pMem->db==0 || sqlite3_mutex_held(pMem->db->mutex) );
+ assert( EIGHT_BYTE_ALIGNMENT(pMem) );
flags = pMem->flags;
if( flags & MEM_Int ){
return pMem->u.i;
@@ -373,6 +375,7 @@
*/
double sqlite3VdbeRealValue(Mem *pMem){
assert( pMem->db==0 || sqlite3_mutex_held(pMem->db->mutex) );
+ assert( EIGHT_BYTE_ALIGNMENT(pMem) );
if( pMem->flags & MEM_Real ){
return pMem->r;
}else if( pMem->flags & MEM_Int ){
@@ -403,6 +406,7 @@
assert( pMem->flags & MEM_Real );
assert( (pMem->flags & MEM_RowSet)==0 );
assert( pMem->db==0 || sqlite3_mutex_held(pMem->db->mutex) );
+ assert( EIGHT_BYTE_ALIGNMENT(pMem) );
pMem->u.i = doubleToInt64(pMem->r);
if( pMem->r==(double)pMem->u.i ){
@@ -416,6 +420,8 @@
int sqlite3VdbeMemIntegerify(Mem *pMem){
assert( pMem->db==0 || sqlite3_mutex_held(pMem->db->mutex) );
assert( (pMem->flags & MEM_RowSet)==0 );
+ assert( EIGHT_BYTE_ALIGNMENT(pMem) );
+
pMem->u.i = sqlite3VdbeIntValue(pMem);
MemSetTypeFlag(pMem, MEM_Int);
return SQLITE_OK;
@@ -427,6 +433,8 @@
*/
int sqlite3VdbeMemRealify(Mem *pMem){
assert( pMem->db==0 || sqlite3_mutex_held(pMem->db->mutex) );
+ assert( EIGHT_BYTE_ALIGNMENT(pMem) );
+
pMem->r = sqlite3VdbeRealValue(pMem);
MemSetTypeFlag(pMem, MEM_Real);
return SQLITE_OK;
diff -u sqlite/src/vdbeaux.c:1.447 sqlite/src/vdbeaux.c:1.448
--- sqlite/src/vdbeaux.c:1.447 Sun Apr 5 12:22:09 2009
+++ sqlite/src/vdbeaux.c Mon Apr 6 11:11:43 2009
@@ -1099,6 +1099,7 @@
}
zCsr += (zCsr - (u8*)0)&7;
assert( EIGHT_BYTE_ALIGNMENT(zCsr) );
+ if( zEnd<zCsr ) zEnd = zCsr;
do {
memset(zCsr, 0, zEnd-zCsr);
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