Merge latest trunk changes with this branch.

FossilOrigin-Name: 1b2824f1d11ac336779372e322aecfb36fb2a31d

manifest

@@ -1,5 +1,5 @@
-C Merge\srecent\strunk\smicro-optimizations\sand\sthe\sDESC\sindex\sGROUP\sBY\sORDER\sBY\nbug\sfix\sinto\sthe\ssessions\sbranch.
-D 2014-10-14T13:41:32.002
+C Merge\slatest\strunk\schanges\swith\sthis\sbranch.
+D 2014-10-15T19:37:13.299
 F Makefile.arm-wince-mingw32ce-gcc d6df77f1f48d690bd73162294bbba7f59507c72f
 F Makefile.in dd5f245aa8c741bc65845747203c8ce2f3fb6c83
 F Makefile.linux-gcc 91d710bdc4998cb015f39edf3cb314ec4f4d7e23
@@ -188,9 +188,9 @@ F src/auth.c d8abcde53426275dab6243b441256fcd8ccbebb2
 F src/backup.c a31809c65623cc41849b94d368917f8bb66e6a7e
 F src/bitvec.c 19a4ba637bd85f8f63fc8c9bae5ade9fb05ec1cb
 F src/btmutex.c 49ca66250c7dfa844a4d4cb8272b87420d27d3a5
-F src/btree.c c9fcae8145436f728c61272cba72b1469c07f30d
+F src/btree.c 1b1123cba0c65caa0baa51e71b8c089e3167c3ed
 F src/btree.h a79aa6a71e7f1055f01052b7f821bd1c2dce95c8
-F src/btreeInt.h 1bd7957161a1346a914f1f09231610e777a8e58d
+F src/btreeInt.h 026d0129724e8f265fdc60d44ec240cf5a4e6179
 F src/build.c 9dc2bd94347b878c89627000c92b0c8d97ec2919
 F src/callback.c 7b44ce59674338ad48b0e84e7b72f935ea4f68b0
 F src/complete.c 535183afb3c75628b78ce82612931ac7cdf26f14
@@ -311,10 +311,10 @@ F src/vdbeInt.h 7254c20b45033e1194601a02f3a386e39263c0ab
 F src/vdbeapi.c 30a1c991147fdf4334900b5fed8a312ae7678707
 F src/vdbeaux.c 191ea23e5adbe5b6adcb9d31860b9fb890834e24
 F src/vdbeblob.c d65b01f439df63911ac3d7a9a85c15503965f2c3
-F src/vdbemem.c 1731e1db2b71e62243cf825b920d14adefaba3c7
+F src/vdbemem.c 96e41193b4affd9ebc0eea2fa628879dac88c744
 F src/vdbesort.c 5c1bacf90578d22b630fbf6ed98ccf60d83435ef
 F src/vdbetrace.c 7e4222955e07dd707a2f360c0eb73452be1cb010
-F src/vtab.c 019dbfd0406a7447c990e1f7bd1dfcdb8895697f
+F src/vtab.c cb0c194303fea276b48d7d4b6d970b5a96bde8de
 F src/wal.c 10e7de7ce90865a68153f001a61f1d985cd17983
 F src/wal.h df01efe09c5cb8c8e391ff1715cca294f89668a4
 F src/walker.c c253b95b4ee44b21c406e2a1052636c31ea27804
@@ -693,7 +693,7 @@ F test/lock.test 87af515b0c4cf928576d0f89946d67d7c265dfb4
 F test/lock2.test 5242d8ac4e2d59c403aebff606af449b455aceff
 F test/lock3.test f271375930711ae044080f4fe6d6eda930870d00
 F test/lock4.test e175ae13865bc87680607563bafba21f31a26f12
-F test/lock5.test 5ad6a1f536036ff1be915cfdd41481aeafda3273
+F test/lock5.test c6c5e0ebcb21c61a572870cc86c0cb9f14cede38
 F test/lock6.test ad5b387a3a8096afd3c68a55b9535056431b0cf5
 F test/lock7.test 49f1eaff1cdc491cc5dee3669f3c671d9f172431
 F test/lock_common.tcl 0c270b121d40959fa2f3add382200c27045b3d95
@@ -799,7 +799,7 @@ F test/rdonly.test dd30a4858d8e0fbad2304c2bd74a33d4df36412a
 F test/regexp1.test 497ea812f264d12b6198d6e50a76be4a1973a9d8
 F test/reindex.test 44edd3966b474468b823d481eafef0c305022254
 F test/releasetest.mk 2eced2f9ae701fd0a29e714a241760503ccba25a
-F test/releasetest.tcl 4296b9adbc5992bcd0b0b2876b7651f57c1494f2
+F test/releasetest.tcl a4279c890698584feb2ffc86735857a4e4474180
 F test/resolver01.test 33abf37ff8335e6bf98f2b45a0af3e06996ccd9a
 F test/rollback.test e9504a009a202c3ed711da2e6879ff60c5a4669c
 F test/rowhash.test 0bc1d31415e4575d10cacf31e1a66b5cc0f8be81
@@ -1221,7 +1221,7 @@ F tool/vdbe_profile.tcl 67746953071a9f8f2f668b73fe899074e2c6d8c1
 F tool/warnings-clang.sh f6aa929dc20ef1f856af04a730772f59283631d4
 F tool/warnings.sh 0abfd78ceb09b7f7c27c688c8e3fe93268a13b32
 F tool/win/sqlite.vsix deb315d026cc8400325c5863eef847784a219a2f
-P abfef254721ca29b653f24bfe80e88adaa92dc6c 005e5b388a8a97bca6d1f0e06c40d68d92aa1212
-R 97eb4d72b7b8377fe0610a9bf4a72e27
-U drh
-Z 615445a8ed5827e2422bf5308f655db8
+P 83d4114f2aa404e670ced33511183baacd813a01 3c1e70f4d55bc009ed9ed4cf6d756d7061985851
+R 573bb7e03bcfc05e0f889e571f4f3aa7
+U dan
+Z d7531a3919881ed86fbddd665aff411c

manifest.uuid

@@ -1 +1 @@
-83d4114f2aa404e670ced33511183baacd813a01
+1b2824f1d11ac336779372e322aecfb36fb2a31d

src/btree.c

@@ -2108,7 +2108,8 @@ static int removeFromSharingList(BtShared *pBt){
 
 /*
 ** Make sure pBt->pTmpSpace points to an allocation of 
-** MX_CELL_SIZE(pBt) bytes.
+** MX_CELL_SIZE(pBt) bytes with a 4-byte prefix for a left-child
+** pointer.
 */
 static void allocateTempSpace(BtShared *pBt){
   if( !pBt->pTmpSpace ){
@@ -2123,8 +2124,16 @@ static void allocateTempSpace(BtShared *pBt){
     ** it into a database page. This is not actually a problem, but it
     ** does cause a valgrind error when the 1 or 2 bytes of unitialized 
     ** data is passed to system call write(). So to avoid this error,
-    ** zero the first 4 bytes of temp space here.  */
-    if( pBt->pTmpSpace ) memset(pBt->pTmpSpace, 0, 4);
+    ** zero the first 4 bytes of temp space here.
+    **
+    ** Also:  Provide four bytes of initialized space before the
+    ** beginning of pTmpSpace as an area available to prepend the
+    ** left-child pointer to the beginning of a cell.
+    */
+    if( pBt->pTmpSpace ){
+      memset(pBt->pTmpSpace, 0, 8);
+      pBt->pTmpSpace += 4;
+    }
   }
 }
 
@@ -2132,8 +2141,11 @@ static void allocateTempSpace(BtShared *pBt){
 ** Free the pBt->pTmpSpace allocation
 */
 static void freeTempSpace(BtShared *pBt){
-  sqlite3PageFree( pBt->pTmpSpace);
-  pBt->pTmpSpace = 0;
+  if( pBt->pTmpSpace ){
+    pBt->pTmpSpace -= 4;
+    sqlite3PageFree(pBt->pTmpSpace);
+    pBt->pTmpSpace = 0;
+  }
 }
 
 /*

src/btreeInt.h

@@ -436,7 +436,7 @@ struct BtShared {
   BtLock *pLock;        /* List of locks held on this shared-btree struct */
   Btree *pWriter;       /* Btree with currently open write transaction */
 #endif
-  u8 *pTmpSpace;        /* BtShared.pageSize bytes of space for tmp use */
+  u8 *pTmpSpace;        /* Temp space sufficient to hold a single cell */
 };
 
 /*

src/vdbemem.c

@@ -143,7 +143,7 @@ SQLITE_NOINLINE int sqlite3VdbeMemGrow(Mem *pMem, int n, int bPreserve){
     }
   }
 
-  if( pMem->z && bPreserve && pMem->z!=pMem->zMalloc ){
+  if( bPreserve && pMem->z && pMem->z!=pMem->zMalloc ){
     memcpy(pMem->zMalloc, pMem->z, pMem->n);
   }
   if( (pMem->flags&MEM_Dyn)!=0 ){

src/vtab.c

@@ -519,6 +519,7 @@ static int vtabCallConstructor(
   }else if( ALWAYS(pVTable->pVtab) ){
     /* Justification of ALWAYS():  A correct vtab constructor must allocate
     ** the sqlite3_vtab object if successful.  */
+    memset(pVTable->pVtab, 0, sizeof(pVTable->pVtab[0]));
     pVTable->pVtab->pModule = pMod->pModule;
     pVTable->nRef = 1;
     if( sCtx.pTab ){

test/lock5.test

@@ -154,6 +154,7 @@ do_test lock5-flock.8 {
 do_test lock5-none.1 {
   sqlite3 db test.db -vfs unix-none
   sqlite3 db2 test.db -vfs unix-none
+  execsql { PRAGMA mmap_size = 0 } db2
   execsql {
     BEGIN;
     INSERT INTO t1 VALUES(3, 4);
@@ -162,8 +163,8 @@ do_test lock5-none.1 {
 do_test lock5-none.2 {
   execsql { SELECT * FROM t1 }
 } {1 2 3 4}
-do_test lock5-flock.3 {
-  execsql { SELECT * FROM t1 } db2
+do_test lock5-none.3 {
+  execsql { SELECT * FROM t1; } db2
 } {1 2}
 do_test lock5-none.4 {
   execsql { 
@@ -183,7 +184,7 @@ ifcapable memorymanage {
   } {1 2 3 4}
 }
 
-do_test lock5-flock.X {
+do_test lock5-none.X {
   db close
   db2 close
 } {}

test/releasetest.tcl

@@ -196,7 +196,8 @@ array set ::Platforms {
     "Device-Two"              test
     "Ftrapv"                  test
     "No-lookaside"            test
-    "Default"                 "threadtest test"
+    "Devkit"                  test
+    "Default"                 "threadtest fulltest"
     "Device-One"              fulltest
   }
   Linux-i686 {