Require that the buffer specified by SQLITE_CONFIG_HEAP be 8-byte aligned. (CVS 6739)

FossilOrigin-Name: 18b78068cc94de51f081824c93f7b14c7c35726d

manifest

@@ -1,5 +1,5 @@
-C Changes\sto\stokenize.c\sto\sfacilitate\sfull\scoverage\stesting.\s(CVS\s6738)
-D 2009-06-09T18:01:38
+C Require\sthat\sthe\sbuffer\sspecified\sby\sSQLITE_CONFIG_HEAP\sbe\s8-byte\saligned.\s(CVS\s6739)
+D 2009-06-09T18:02:10
 F Makefile.arm-wince-mingw32ce-gcc fcd5e9cd67fe88836360bb4f9ef4cb7f8e2fb5a0
 F Makefile.in 8b8fb7823264331210cddf103831816c286ba446
 F Makefile.linux-gcc d53183f4aa6a9192d249731c90dbdffbd2c68654
@@ -125,7 +125,7 @@ F src/insert.c 69ef88ce30d1f65315b57aba63b2d4e9bdca1090
 F src/journal.c e00df0c0da8413ab6e1bb7d7cab5665d4a9000d0
 F src/legacy.c 9a56cf126ceee332b56061bf16bd0fb4ff9e26c0
 F src/loadext.c 0e88a335665db0b2fb4cece3e49dcb65d832635a
-F src/main.c 1845bc74375dcd6c0f5f840c319c84a1f0e4f759
+F src/main.c 839ebfc7fa3b5a9f36223f536f6b5fef2a5ecf63
 F src/malloc.c 7b3b6423f5b355e5d649b91e16ef252d610bcf19
 F src/mem0.c f2f84062d1f35814d6535c9f9e33de3bfb3b132c
 F src/mem1.c e6d5c23941288df8191b8a98c28e3f57771e2270
@@ -160,7 +160,7 @@ F src/resolve.c f86d3490cf93a12f8a451720defc622cbc79873a
 F src/rowset.c c64dafba1f9fd876836c8db8682966b9d197eb1f
 F src/select.c 2d97084a176a63eabce2d043eb4fbb13c46d6e9f
 F src/shell.c db2643650b9268df89a4bedca3f1c6d9e786f1bb
-F src/sqlite.h.in 79210c4d8905cfb4b038486dde5f36fabb796a86
+F src/sqlite.h.in e23556112022f04c9c49a4fc9871be16223250c3
 F src/sqlite3ext.h 1db7d63ab5de4b3e6b83dd03d1a4e64fef6d2a17
 F src/sqliteInt.h f8d70341d527404c5f162dc7fcc0f005700d0b48
 F src/sqliteLimit.h ffe93f5a0c4e7bd13e70cd7bf84cfb5c3465f45d
@@ -733,7 +733,7 @@ F tool/speedtest2.tcl ee2149167303ba8e95af97873c575c3e0fab58ff
 F tool/speedtest8.c 2902c46588c40b55661e471d7a86e4dd71a18224
 F tool/speedtest8inst1.c 293327bc76823f473684d589a8160bde1f52c14e
 F tool/vdbe-compress.tcl 672f81d693a03f80f5ae60bfefacd8a349e76746
-P ed1d4f47ee9a2bcafdee92ee6bfcb2b0d1758f76
-R a484012154ac91faa0af1a2719a7c8fa
+P 5e8c48cff7e96e6030b796dba409844f4c758a60
+R cd4064526d818accd8a7986c2bb8a4af
 U drh
-Z 0d3e67979c087a1a6baac804f1996882
+Z 7b1665741275b81f0c1d362ef376953e

manifest.uuid

@@ -1 +1 @@
-5e8c48cff7e96e6030b796dba409844f4c758a60
+18b78068cc94de51f081824c93f7b14c7c35726d

src/main.c

@@ -14,7 +14,7 @@
 ** other files are for internal use by SQLite and should not be
 ** accessed by users of the library.
 **
-** $Id: main.c,v 1.555 2009/06/01 16:53:10 shane Exp $
+** $Id: main.c,v 1.556 2009/06/09 18:02:10 drh Exp $
 */
 #include "sqliteInt.h"
 
@@ -338,6 +338,11 @@ int sqlite3_config(int op, ...){
       sqlite3GlobalConfig.nHeap = va_arg(ap, int);
       sqlite3GlobalConfig.mnReq = va_arg(ap, int);
 
+      /* Must have 8-byte alignment */
+      if( ((sqlite3GlobalConfig.pHeap - (char*)0)&7)!=0 ){
+        return SQLITE_MISUSE;
+      }
+
       if( sqlite3GlobalConfig.pHeap==0 ){
         /* If the heap pointer is NULL, then restore the malloc implementation
         ** back to NULL pointers too.  This will cause the malloc to go
@@ -349,7 +354,6 @@ int sqlite3_config(int op, ...){
         /* The heap pointer is not NULL, then install one of the
         ** mem5.c/mem3.c methods. If neither ENABLE_MEMSYS3 nor
         ** ENABLE_MEMSYS5 is defined, return an error.
-        ** the default case and return an error.
         */
 #ifdef SQLITE_ENABLE_MEMSYS3
         sqlite3GlobalConfig.m = *sqlite3MemGetMemsys3();

src/sqlite.h.in

@@ -30,7 +30,7 @@
 ** the version number) and changes its name to "sqlite3.h" as
 ** part of the build process.
 **
-** @(#) $Id: sqlite.h.in,v 1.455 2009/05/24 21:59:28 drh Exp $
+** @(#) $Id: sqlite.h.in,v 1.456 2009/06/09 18:02:10 drh Exp $
 */
 #ifndef _SQLITE3_H_
 #define _SQLITE3_H_
@@ -1077,7 +1077,9 @@ struct sqlite3_mem_methods {
 ** undoing any prior invocation of [SQLITE_CONFIG_MALLOC].  If the
 ** memory pointer is not NULL and either [SQLITE_ENABLE_MEMSYS3] or
 ** [SQLITE_ENABLE_MEMSYS5] are defined, then the alternative memory
-** allocator is engaged to handle all of SQLites memory allocation needs.</dd>
+** allocator is engaged to handle all of SQLites memory allocation needs.
+** The first pointer (the memory pointer) must be aligned to an 8-byte
+** boundary or the behavior is undefined.</dd>
 **
 ** <dt>SQLITE_CONFIG_MUTEX</dt>
 ** <dd>This option takes a single argument which is a pointer to an