From: danielk1977 <danielk1977@noemail.net>
Date: Fri, 20 Mar 2009 14:18:51 +0000 (+0000)
Subject: Make sure struct WhereClause is aligned on an 8-byte boundary. Fix for #3613, #3736... 
X-Git-Tag: version-3.6.15~386
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=be2296501c03e6807408c3a5c4b062a24daca561;p=thirdparty%2Fsqlite.git

Make sure struct WhereClause is aligned on an 8-byte boundary. Fix for #3613, #3736. (CVS 6364)

FossilOrigin-Name: 093a0cf4adc8613f744c2ccdef61f0b30a46818c
---

diff --git a/manifest b/manifest
index ecfcd0c706..7887ffb455 100644
--- a/manifest
+++ b/manifest
@@ -1,5 +1,5 @@
-C Rename\sthe\sunused\sMEM2\sstatic\smutex\sto\sOPEN\sand\sreuse\sit\sto\sserialize\saccess\nto\sthe\ssqlite3BtreeOpen()\sroutine\sto\sprevent\sa\srace\scondition\son\sdetection\nof\ssharable\scaches.\s\sTicket\s#3735.\s(CVS\s6363)
-D 2009-03-20T13:15:30
+C Make\ssure\sstruct\sWhereClause\sis\saligned\son\san\s8-byte\sboundary.\sFix\sfor\s#3613,\s#3736.\s(CVS\s6364)
+D 2009-03-20T14:18:52
 F Makefile.arm-wince-mingw32ce-gcc fcd5e9cd67fe88836360bb4f9ef4cb7f8e2fb5a0
 F Makefile.in 583e87706abc3026960ed759aff6371faf84c211
 F Makefile.linux-gcc d53183f4aa6a9192d249731c90dbdffbd2c68654
@@ -105,7 +105,7 @@ F src/bitvec.c 44f7059ac1f874d364b34af31b9617e52223ba75
 F src/btmutex.c 341502bc496dc0840dcb00cde65680fb0e85c3ab
 F src/btree.c 4fbb5f26f450bee7356ec63cb664c8d733e28d89
 F src/btree.h e302c5747494067cd4f5763000fbe7bca767d816
-F src/btreeInt.h 17697718bb5281b12da5c65ecb0bffc45f2c0125
+F src/btreeInt.h df64030d632f8c8ac217ed52e8b6b3eacacb33a5
 F src/build.c c816377c118047418fda81edb8866b9c7a4e4031
 F src/callback.c 09c6fedc77a45db99ba25a75d61382830314b357
 F src/complete.c cb14e06dbe79dee031031f0d9e686ff306afe07c
@@ -159,7 +159,7 @@ F src/select.c 4d0b77fd76ff80f09a798ee98953e344c9de8fbb
 F src/shell.c 0a11f831603f17fea20ca97133c0f64e716af4a7
 F src/sqlite.h.in 0db1e59d89aeacb8fe64a19fd14c13a796060ccb
 F src/sqlite3ext.h 1db7d63ab5de4b3e6b83dd03d1a4e64fef6d2a17
-F src/sqliteInt.h 250be86c98646e0d48436d6455b6fe916742bffa
+F src/sqliteInt.h 0ba7aac31f707d69f73455f2cff296787f76e109
 F src/sqliteLimit.h ffe93f5a0c4e7bd13e70cd7bf84cfb5c3465f45d
 F src/status.c 237b193efae0cf6ac3f0817a208de6c6c6ef6d76
 F src/table.c 332ab0ea691e63862e2a8bdfe2c0617ee61062a3
@@ -209,7 +209,7 @@ F src/vdbeblob.c 3408f5e1ab62627300b9c9c3168cff1de65e1658
 F src/vdbemem.c 543a79d722734d2f8b7ad70f08218c30bcc5bbf5
 F src/vtab.c 18d671f0a45d0159088070bc6b219a3105034c87
 F src/walker.c 42bd3f00ca2ef5ae842304ec0d59903ef051412d
-F src/where.c ac555c8f6ef71a80944b31dcb212f7127c9ae30c
+F src/where.c 42d3756dbed6ed390bafcd849cc2075230e0eda6
 F test/aggerror.test a867e273ef9e3d7919f03ef4f0e8c0d2767944f2
 F test/alias.test 597662c5d777a122f9a3df0047ea5c5bd383a911
 F test/all.test 14165b3e32715b700b5f0cbf8f6e3833dda0be45
@@ -709,7 +709,7 @@ F tool/speedtest16.c c8a9c793df96db7e4933f0852abb7a03d48f2e81
 F tool/speedtest2.tcl ee2149167303ba8e95af97873c575c3e0fab58ff
 F tool/speedtest8.c 2902c46588c40b55661e471d7a86e4dd71a18224
 F tool/speedtest8inst1.c 293327bc76823f473684d589a8160bde1f52c14e
-P 56e6fca1a9da69c3a0fe43b00db9a6d9d93f03ba
-R e2b2822c930e07999a7faadbecce8455
-U drh
-Z 94771809e81ff193bb7785b130c75e1e
+P 19fa5a29b97f017a9e176e48c848100299ba6920
+R 7488665d9a2cafa9025a5fd3b2a16baf
+U danielk1977
+Z 7d097ac4987cc470b6a73e382cea7d80
diff --git a/manifest.uuid b/manifest.uuid
index 5d0835618f..770f993086 100644
--- a/manifest.uuid
+++ b/manifest.uuid
@@ -1 +1 @@
-19fa5a29b97f017a9e176e48c848100299ba6920
\ No newline at end of file
+093a0cf4adc8613f744c2ccdef61f0b30a46818c
\ No newline at end of file
diff --git a/src/btreeInt.h b/src/btreeInt.h
index 3d2d02c9ea..0c196d36e6 100644
--- a/src/btreeInt.h
+++ b/src/btreeInt.h
@@ -9,7 +9,7 @@
 **    May you share freely, never taking more than you give.
 **
 *************************************************************************
-** $Id: btreeInt.h,v 1.45 2009/03/18 10:33:01 danielk1977 Exp $
+** $Id: btreeInt.h,v 1.46 2009/03/20 14:18:52 danielk1977 Exp $
 **
 ** This file implements a external (disk-based) database using BTrees.
 ** For a detailed discussion of BTrees, refer to
@@ -205,11 +205,6 @@
 */
 #include "sqliteInt.h"
 
-/* Round up a number to the next larger multiple of 8.  This is used
-** to force 8-byte alignment on 64-bit architectures.
-*/
-#define ROUND8(x)   ((x+7)&~7)
-
 
 /* The following value is the maximum cell size assuming a maximum page
 ** size give above.
diff --git a/src/sqliteInt.h b/src/sqliteInt.h
index f2833180da..506daaee94 100644
--- a/src/sqliteInt.h
+++ b/src/sqliteInt.h
@@ -11,7 +11,7 @@
 *************************************************************************
 ** Internal interface definitions for SQLite.
 **
-** @(#) $Id: sqliteInt.h,v 1.843 2009/03/18 10:33:01 danielk1977 Exp $
+** @(#) $Id: sqliteInt.h,v 1.844 2009/03/20 14:18:52 danielk1977 Exp $
 */
 #ifndef _SQLITEINT_H_
 #define _SQLITEINT_H_
@@ -444,6 +444,12 @@ extern const int sqlite3one;
 #define LARGEST_INT64  (0xffffffff|(((i64)0x7fffffff)<<32))
 #define SMALLEST_INT64 (((i64)-1) - LARGEST_INT64)
 
+/* 
+** Round up a number to the next larger multiple of 8.  This is used
+** to force 8-byte alignment on 64-bit architectures.
+*/
+#define ROUND8(x)    ((x+7)&~7)
+
 /*
 ** An instance of the following structure is used to store the busy-handler
 ** callback for a given sqlite handle. 
diff --git a/src/where.c b/src/where.c
index c506339f78..96e4652451 100644
--- a/src/where.c
+++ b/src/where.c
@@ -16,7 +16,7 @@
 ** so is applicable.  Because this module is responsible for selecting
 ** indices, you might also think of this module as the "query optimizer".
 **
-** $Id: where.c,v 1.374 2009/03/05 03:48:07 shane Exp $
+** $Id: where.c,v 1.375 2009/03/20 14:18:52 danielk1977 Exp $
 */
 #include "sqliteInt.h"
 
@@ -2861,7 +2861,7 @@ static void whereInfoFree(sqlite3 *db, WhereInfo *pWInfo){
         assert( pInfo->needToFreeIdxStr==0 || db->mallocFailed );
         if( pInfo->needToFreeIdxStr ){
           sqlite3_free(pInfo->idxStr);
-	}
+        }
         sqlite3DbFree(db, pInfo);
       }
     }
@@ -2968,6 +2968,7 @@ WhereInfo *sqlite3WhereBegin(
   int regRowSet         /* Register hold RowSet if WHERE_FILL_ROWSET is set */
 ){
   int i;                     /* Loop counter */
+  int nByteWInfo;            /* Num. bytes allocated for WhereInfo struct */
   WhereInfo *pWInfo;         /* Will become the return value of this function */
   Vdbe *v = pParse->pVdbe;   /* The virtual database engine */
   Bitmask notReady;          /* Cursors that are not yet positioned */
@@ -2993,15 +2994,19 @@ WhereInfo *sqlite3WhereBegin(
   }
 
   /* Allocate and initialize the WhereInfo structure that will become the
-  ** return value.
+  ** return value. A single allocation is used to store the WhereInfo
+  ** struct, the contents of WhereInfo.a[], the WhereClause structure
+  ** and the WhereMaskSet structure. Since WhereClause contains an 8-byte
+  ** field (type Bitmask) it must be aligned on an 8-byte boundary on
+  ** some architectures. Hence the ROUND8() below.
   */
   db = pParse->db;
-  pWInfo = sqlite3DbMallocZero(db,  
-                      sizeof(WhereInfo)
-                      + (pTabList->nSrc-1)*sizeof(WhereLevel)
-                      + sizeof(WhereClause)
-                      + sizeof(WhereMaskSet)
-           );
+  nByteWInfo = ROUND8(sizeof(WhereInfo)+(pTabList->nSrc-1)*sizeof(WhereLevel));
+  pWInfo = sqlite3DbMallocZero(db, 
+      nByteWInfo + 
+      sizeof(WhereClause) +
+      sizeof(WhereMaskSet)
+  );
   if( db->mallocFailed ){
     goto whereBeginError;
   }
@@ -3010,7 +3015,7 @@ WhereInfo *sqlite3WhereBegin(
   pWInfo->pTabList = pTabList;
   pWInfo->iBreak = sqlite3VdbeMakeLabel(v);
   pWInfo->regRowSet = (wctrlFlags & WHERE_FILL_ROWSET) ? regRowSet : -1;
-  pWInfo->pWC = pWC = (WhereClause*)&pWInfo->a[pWInfo->nLevel];
+  pWInfo->pWC = pWC = (WhereClause *)&((u8 *)pWInfo)[nByteWInfo];
   pWInfo->wctrlFlags = wctrlFlags;
   pMaskSet = (WhereMaskSet*)&pWC[1];