Avoid a segfault when running vacuum on an in-memory database. Ticket #3620. (CVS 6221)

FossilOrigin-Name: 407830c6839a81fa0a1010940740df3011713a88

manifest

@@ -1,5 +1,5 @@
-C Fix\sa\sround-off\serror\swhen\smoving\sdates\sby\snegative\smodifier\samounts.\nTicket\s#3618.\s\sEnhance\sthe\s"NNN\syears"\smodifier\sto\saccept\sfractional\nyears.\s(CVS\s6220)
-D 2009-01-30T17:27:44
+C Avoid\sa\ssegfault\swhen\srunning\svacuum\son\san\sin-memory\sdatabase.\sTicket\s#3620.\s(CVS\s6221)
+D 2009-01-31T14:54:07
 F Makefile.arm-wince-mingw32ce-gcc fcd5e9cd67fe88836360bb4f9ef4cb7f8e2fb5a0
 F Makefile.in 3871d308188cefcb7c5ab20da4c7b6aad023bc52
 F Makefile.linux-gcc d53183f4aa6a9192d249731c90dbdffbd2c68654
@@ -103,7 +103,7 @@ F src/attach.c 1c35f95da3c62d19de75b44cfefd12c81c1791b3
 F src/auth.c c8b2ab5c8bad4bd90ed7c294694f48269162c627
 F src/bitvec.c 44f7059ac1f874d364b34af31b9617e52223ba75
 F src/btmutex.c 63c5cc4ad5715690767ffcb741e185d7bc35ec1a
-F src/btree.c 606c67b1b544d2324a9e4ab365cedaa1f828c7f4
+F src/btree.c dfbbfc396fdd8cbc29754864a97c4df484b78870
 F src/btree.h 07359623fa24748709dd61212a32364a6adc6b56
 F src/btreeInt.h 44bcbfe387ba99a3a9f2527bd12fa1bb8bc574b3
 F src/build.c c8bf5dcef4d5889bc57eecdb8b3dba178e5e06a8
@@ -142,8 +142,8 @@ F src/os_common.h 24525d8b7bce66c374dfc1810a6c9043f3359b60
 F src/os_os2.c bed77dc26e3a95ce4a204936b9a1ca6fe612fcc5
 F src/os_unix.c c74255cc1fcddc38fc3cc1dcf70c2325d3c2948e
 F src/os_win.c ec133f2a3c0da786995ea09ba67056af8f18cc2e
-F src/pager.c 3a36360acb9caa54d4fdd6439454348eab3b4b5a
-F src/pager.h 59e3b500a0f6a8d17ec61976535007b0de39b9a4
+F src/pager.c 72f4e7b3076584889ce6286cd15ff2d985325026
+F src/pager.h eccf5cdeebd79006ba7f9577dd30d8179b1430da
 F src/parse.y 4f4d16aee0d11f69fec2adb77dac88878043ed8d
 F src/pcache.c fcf7738c83c4d3e9d45836b2334c8a368cc41274
 F src/pcache.h 9b927ccc5a538e31b4c3bc7eec4f976db42a1324
@@ -636,7 +636,7 @@ F test/types3.test a0f66bf12f80fad89493535474f7a6d16fa58150
 F test/unique.test 0253c4227a5dc533e312202ce21ecfad18058d18
 F test/update.test 8bc86fd7ef1a00014f76dc6a6a7c974df4aef172
 F test/utf16align.test 54cd35a27c005a9b6e7815d887718780b6a462ae
-F test/vacuum.test 07eff517a871f08165251860438cf8bbd87d6ed4
+F test/vacuum.test 68e39b2228b4b772166debef4a82accf6ddd32f3
 F test/vacuum2.test fd87eec0ed72c6cc0809f7867929e2895affed92
 F test/vacuum3.test f39ad1428347c5808cd2da7578c470f186a4d0ce
 F test/varint.test ab7b110089a08b9926ed7390e7e97bdefeb74102
@@ -693,7 +693,7 @@ F tool/speedtest16.c c8a9c793df96db7e4933f0852abb7a03d48f2e81
 F tool/speedtest2.tcl ee2149167303ba8e95af97873c575c3e0fab58ff
 F tool/speedtest8.c 2902c46588c40b55661e471d7a86e4dd71a18224
 F tool/speedtest8inst1.c 293327bc76823f473684d589a8160bde1f52c14e
-P c5dca1146de72071ed2e5fdf6890f41682272587
-R 6a74041552de27456797035382a955bb
-U drh
-Z 4f589fc1347644d84b8da190a4ca5065
+P 86be908c5e77ba2b9ac98e394fa987b443d790f8
+R 338358bbac17f79c52e09eabfb9a08f6
+U danielk1977
+Z 69820336f312727069bd2180b04a2b93

manifest.uuid

@@ -1 +1 @@
-86be908c5e77ba2b9ac98e394fa987b443d790f8
+407830c6839a81fa0a1010940740df3011713a88

src/btree.c

@@ -9,7 +9,7 @@
 **    May you share freely, never taking more than you give.
 **
 *************************************************************************
-** $Id: btree.c,v 1.562 2009/01/28 20:21:17 drh Exp $
+** $Id: btree.c,v 1.563 2009/01/31 14:54:07 danielk1977 Exp $
 **
 ** This file implements a external (disk-based) database using BTrees.
 ** See the header comment on "btreeInt.h" for additional information.
@@ -7390,6 +7390,10 @@ static int btreeCopyFile(Btree *pTo, Btree *pFrom){
     ** file APIs on the database file directly.
     */
     pBtTo->db = pTo->db;
+    if( nFromPageSize==nToPageSize ){
+      sqlite3PagerTruncateImage(pBtTo->pPager, nFromPage);
+      iNow = iSize;
+    }
     rc = sqlite3PagerCommitPhaseOne(pBtTo->pPager, 0, 1);
     if( iSize<iNow && rc==SQLITE_OK ){
       rc = sqlite3OsTruncate(pFile, iSize);

src/pager.c

@@ -18,7 +18,7 @@
 ** file simultaneously, or one process from reading the database while
 ** another is writing.
 **
-** @(#) $Id: pager.c,v 1.560 2009/01/30 05:40:27 shane Exp $
+** @(#) $Id: pager.c,v 1.561 2009/01/31 14:54:07 danielk1977 Exp $
 */
 #ifndef SQLITE_OMIT_DISKIO
 #include "sqliteInt.h"
@@ -2575,7 +2575,6 @@ static int pager_wait_on_lock(Pager *pPager, int locktype){
   return rc;
 }
 
-#ifndef SQLITE_OMIT_AUTOVACUUM
 /*
 ** Truncate the in-memory database file image to nPage pages. This 
 ** function does not actually modify the database file on disk. It 
@@ -2588,7 +2587,6 @@ void sqlite3PagerTruncateImage(Pager *pPager, Pgno nPage){
   assert( pPager->state>=PAGER_RESERVED );
   pPager->dbSize = nPage;
 }
-#endif  /* ifndef SQLITE_OMIT_AUTOVACUUM */
 
 /*
 ** Shutdown the page cache.  Free all memory and close all files.

src/pager.h

@@ -13,7 +13,7 @@
 ** subsystem.  The page cache subsystem reads and writes a file a page
 ** at a time and provides a journal for rollback.
 **
-** @(#) $Id: pager.h,v 1.98 2009/01/24 11:30:43 drh Exp $
+** @(#) $Id: pager.h,v 1.99 2009/01/31 14:54:07 danielk1977 Exp $
 */
 
 #ifndef _PAGER_H_
@@ -136,10 +136,8 @@ const char *sqlite3PagerJournalname(Pager*);
 int sqlite3PagerNosync(Pager*);
 void *sqlite3PagerTempSpace(Pager*);
 
-/* Functions used in auto-vacuum mode to truncate the database file. */
-#ifndef SQLITE_OMIT_AUTOVACUUM
-  void sqlite3PagerTruncateImage(Pager*,Pgno);
-#endif
+/* Functions used to truncate the database file. */
+void sqlite3PagerTruncateImage(Pager*,Pgno);
 
 /* Used by encryption extensions. */
 #ifdef SQLITE_HAS_CODEC

test/vacuum.test

@@ -11,7 +11,7 @@
 # This file implements regression tests for SQLite library.  The
 # focus of this file is testing the VACUUM statement.
 #
-# $Id: vacuum.test,v 1.42 2009/01/22 23:04:47 drh Exp $
+# $Id: vacuum.test,v 1.43 2009/01/31 14:54:07 danielk1977 Exp $
 
 set testdir [file dirname $argv0]
 source $testdir/tester.tcl
@@ -287,7 +287,14 @@ do_test vacuum-7.0 {
     CREATE TABLE t1(t);
     VACUUM;
   } db2
-} {}
+  execsql {
+    CREATE TABLE t2(t);
+    CREATE TABLE t3(t);
+    DROP TABLE t2;
+    VACUUM;
+    pragma integrity_check;
+  } db2
+} {ok}
 db2 close
 
 # Ticket #873.  VACUUM a database that has ' in its name.