With SQLITE_ENABLE_BLOCK_ATOMIC_WRITE enabled, if a transaction is committing

and there is a new freelist page at the end of the database file which would
cause the database file size to grow, ensure that page is written and the
file size grows before the block-atomic-write commits.  Fix for the
problem identified by [forum:/forumpost/3bd8d497b2|forum post 3bd8d497b2]

FossilOrigin-Name: c9fdd6805df04f05ef347e5a43506fd37a729c5924abb6e1103e871c4ac2d6dc

diff --git a/manifest b/manifest
index b00c6fb9426e40c5d1411aae30735df2bce7c13b..482e9ce639c28a497234638b1f12acce1060911b 100644 (file)
--- a/manifest
+++ b/manifest
@@ -1,5 +1,5 @@
-C For\sWindows\sCLI,\sinstitute\sa\sversion\scheck\sto\sdetermine\sdefault\sMBCS\sor\sUTF-8\stranslation\son\sconsole\sI/O.\s(Default\sto\sUTF-8\swhere\sknown\spossible.)
-D 2023-10-29T20:05:18.263
+C With\sSQLITE_ENABLE_BLOCK_ATOMIC_WRITE\senabled,\sif\sa\stransaction\sis\scommitting\nand\sthere\sis\sa\snew\sfreelist\spage\sat\sthe\send\sof\sthe\sdatabase\sfile\swhich\swould\ncause\sthe\sdatabase\sfile\ssize\sto\sgrow,\sensure\sthat\spage\sis\swritten\sand\sthe\nfile\ssize\sgrows\sbefore\sthe\sblock-atomic-write\scommits.\s\sFix\sfor\sthe\nproblem\sidentified\sby\s[forum:/forumpost/3bd8d497b2|forum\spost\s3bd8d497b2]
+D 2023-10-30T12:09:48.933
 F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
 F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
 F LICENSE.md df5091916dbb40e6e9686186587125e1b2ff51f022cc334e886c19a0e9982724
@@ -708,7 +708,7 @@ F src/os_setup.h 6011ad7af5db4e05155f385eb3a9b4470688de6f65d6166b8956e58a3d87210
 F src/os_unix.c cb116fde9e3ca3c1bbfdf89d6928f776a2a34da168e2667426523a4db353b271
 F src/os_win.c 4a50a154aeebc66a1f8fb79c1ff6dd5fe3d005556533361e0d460d41cb6a45a8
 F src/os_win.h 7b073010f1451abe501be30d12f6bc599824944a
-F src/pager.c 2188897e1102a776dcb1bbe8b2eb70ac7de8863c9cb95ef09d35e9bad406cf45
+F src/pager.c 9c9343d9ff407fb9e01f8c22e9babbe42807ab53aa1c7d747da77bb2b2f74629
 F src/pager.h f4d33fec8052603758792045493423b8871a996da2d0973927b7d36cd6070473
 F src/parse.y 020d80386eb216ec9520549106353c517d2bbc89be28752ffdca649a9eaf56ec
 F src/pcache.c 040b165f30622a21b7a9a77c6f2e4877a32fb7f22d4c7f0d2a6fa6833a156a75
@@ -2139,8 +2139,8 @@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a91a7acc6293828957a386a8a93
 F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
 F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
 F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
-P 765290663b28e90a0494997baf023f9610a4ed32f0ff0099bf9fc3d485733fca 046c84296627382ee416f64b02b77a937b368e30b32e6b800de5a854810766f6
-R 21d5e98541aed894e5aa957e7e737a78
-U larrybr
-Z 388b78b418fa51ea2b695e5b2ab587f8
+P ddc6ead6453e0f98943bd07aedd90d47bc2e9e9e27b008d493491168bea2b3f1
+R d568eda5a52aecc6980b1f18605b773c
+U drh
+Z 6faa5f859e86aecdc04ddabbaa63c135
 # Remove this line to create a well-formed Fossil manifest.

diff --git a/manifest.uuid b/manifest.uuid
index cec26a520d510b80a2a7d2b134332831195d669e..127b422d23c3a5051c110dac38933b741195013e 100644 (file)
--- a/manifest.uuid
+++ b/manifest.uuid
@@ -1 +1 @@
-ddc6ead6453e0f98943bd07aedd90d47bc2e9e9e27b008d493491168bea2b3f1
\ No newline at end of file
+c9fdd6805df04f05ef347e5a43506fd37a729c5924abb6e1103e871c4ac2d6dc
\ No newline at end of file

diff --git a/src/pager.c b/src/pager.c
index 5c2d556b3e4d592f76737d1dd9d2993ffe642524..826e90f1376a31c6d196ff43ee24587994dbe0b8 100644 (file)
--- a/src/pager.c
+++ b/src/pager.c
@@ -6588,6 +6588,13 @@ int sqlite3PagerCommitPhaseOne(
         rc = sqlite3OsFileControl(fd, SQLITE_FCNTL_BEGIN_ATOMIC_WRITE, 0);
         if( rc==SQLITE_OK ){
           rc = pager_write_pagelist(pPager, pList);
+          if( rc==SQLITE_OK && pPager->dbSize>pPager->dbFileSize ){
+            char *pTmp = pPager->pTmpSpace;
+            int szPage = (int)pPager->pageSize;
+            memset(pTmp, 0, szPage);
+            rc = sqlite3OsWrite(pPager->fd, pTmp, szPage,
+                      (pPager->dbSize*pPager->pageSize)-szPage);
+          }
           if( rc==SQLITE_OK ){
             rc = sqlite3OsFileControl(fd, SQLITE_FCNTL_COMMIT_ATOMIC_WRITE, 0);
           }