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With SQLITE_ENABLE_BLOCK_ATOMIC_WRITE enabled, if a transaction is committing

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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
This commit is contained in:
drh
2023-10-30 12:09:48 +00:00
parent 7c2d3e8a06
commit d2147bd32b
3 changed files with 15 additions and 8 deletions
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14
manifest
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@@ -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
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R 21d5e98541aed894e5aa957e7e737a78
U larrybr
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R d568eda5a52aecc6980b1f18605b773c
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Z 6faa5f859e86aecdc04ddabbaa63c135
# Remove this line to create a well-formed Fossil manifest.

2
manifest.uuid
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@@ -1 +1 @@
ddc6ead6453e0f98943bd07aedd90d47bc2e9e9e27b008d493491168bea2b3f1
c9fdd6805df04f05ef347e5a43506fd37a729c5924abb6e1103e871c4ac2d6dc

7
src/pager.c
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@@ -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);
}