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7,812 Commits 1,608 Branches 185 Tags
6f1501481f3acb932fbf76618cf7e78809b55e19
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68 Commits

Author SHA1 Message Date
dan
6f1501481f Remove entries from wal-index hash tables when a rollback or savepoint rollback occurs. 
FossilOrigin-Name: 36795c2b23a78978528cace193e386138adacd41
 2010-05-21 15:31:56 +00:00
drh
f0b20f8801 Fix the wal-index header read routine so that it correctly detects a zero 
header as being malformed and in need of a wal-index rebuild.

FossilOrigin-Name: 1a4eb3a3efe86c7caff4d9a5894953bce378f841
 2010-05-21 13:16:18 +00:00
drh
286a288493 Add a new xShmBarrier method to the VFS - a shared-memory fence operation. 
Implement the same in both unix and win32.  Use it to make the WAL subsystem
more robust.

FossilOrigin-Name: 1bd011c9fed5ef29fb616b4d0a52df3b82221b1f
 2010-05-20 23:51:06 +00:00
drh
7e263728f2 Make use of the extra information in the WAL header and frame header to 
enhance robustness.

FossilOrigin-Name: 9580ecb7e3beb1949a71784a3dcd1823a88e4a9d
 2010-05-20 21:21:09 +00:00
drh
23ea97b641 Convert the wal-header and frame-header to 24 bytes. Extra information in 
both headers is designed to enhance robustness after crashes, though the
extra information is currently unused.  This is a snapshot of a work in
progress.

FossilOrigin-Name: 669706431f186f92fdc0856a6206419a1e843f46
 2010-05-20 16:45:58 +00:00
drh
4c1cb6ab05 Fix a bug in the new checkpoint computation. Also update the checkpoint 
algorithm in the test scripts to align with the new implementation.

FossilOrigin-Name: 8b6056f2ee596f31b157a792fac05d11f7cb63bb
 2010-05-19 19:09:37 +00:00
drh
584c754d65 Revise the checksumming algorithm in wal.c. More variable refactoring. 
FossilOrigin-Name: 542b90eba6440a0bccef329788fd17a2d3fbeee6
 2010-05-19 18:08:10 +00:00
drh
6e81096fa2 Refactoring some variable names in wal.c. 
FossilOrigin-Name: 1d201ff51f7c5ecdf71a91ed25204b7130894282
 2010-05-19 17:49:50 +00:00
drh
027a128a78 Add a large comment to wal.c describing the WAL and wal-index file formats. 
FossilOrigin-Name: a71a22b52f4570e934063553a81b39268127dc44
 2010-05-19 01:53:53 +00:00
drh
29d4dbefaf Update the wal-index hash format so that hash-table space is reused following 
a rollback, thus preventing hash table overflows.  Add assert()s to verify
that hash tables do not overfill.  Further refactoring of the wal-index code.

FossilOrigin-Name: ada9a8c7b69c5dd2d66bbf62b61181651e6d2142
 2010-05-18 23:29:52 +00:00
drh
a2a42013d2 Refactoring of the WalIterator implementation. 
FossilOrigin-Name: b5b60fdcc5dcf41f2c79912075ac241f7ce220d6
 2010-05-18 18:01:08 +00:00
drh
5939f44375 Mark the shared-memory in the WAL implementation as volatile. 
FossilOrigin-Name: 0a6787908e989bd5e6af25acbdc59ebc8fa61d6d
 2010-05-18 13:27:12 +00:00
drh
e730fec883 Comment clarifications in wal.c. 
FossilOrigin-Name: a029be10172e2e6a2ef4e3eb2ea1bd0ca85b16ed
 2010-05-18 12:56:50 +00:00
drh
69c4696784 Remove an unreachable test from wal.c. 
FossilOrigin-Name: 7162c45673d1068d1fda55a70207a3cd77575502
 2010-05-17 20:16:50 +00:00
drh
5cccc940cc Allow sqlite3WalCheckpoint() to be called even if the WAL is in the 
SQLITE_SHM_READ state, as sometimes happens after an error.

FossilOrigin-Name: 175b296f9b9680f605537f52a8a53944deaa5391
 2010-05-13 15:44:00 +00:00
drh
5500a1f1e6 Make sure xShmGet is never called while already holding the shared-memory 
segment.

FossilOrigin-Name: 92ebdbc5f64ac63796ff56c1e1aec3b95c6bdd20
 2010-05-13 09:11:31 +00:00
dan
bd50ddeb42 Fix for a segfault that can follow a malloc failure. 
FossilOrigin-Name: 3cab9022457ce50f82c5822d8ba6c04a3a85cb6a
 2010-05-13 07:08:53 +00:00
drh
686138fe88 A couple simple fixes to get wal.test mostly working. 
FossilOrigin-Name: c74458127468f30b16715594c8d68e9d3c05d292
 2010-05-12 18:10:52 +00:00
drh
d9e5c4f6ed Refactoring the VFS-SHM methods used by WAL. This version compiles and 
runs non-WAL test cases but crashes and burns on wal.test.

FossilOrigin-Name: 2b00152c1ac0b3735aa6cfab61259ff04d81c701
 2010-05-12 18:01:39 +00:00
dan
ed36020daf Remove a branch made redundant by the earlier exclusive-mode changes. 
FossilOrigin-Name: c501b2ede6aad123bef0aa7ce8b356a134eb6d26
 2010-05-12 06:54:31 +00:00
dan
5543759b1b Changes so that WAL and exclusive-locking mode work together. 
FossilOrigin-Name: 71e7b1cf9f4cd02a2a9bc8a3e58acd7a7e3c7e60
 2010-05-11 12:19:26 +00:00
dan
bb23aff3df Modify the format of the wal-index to use a hash table to index log file segments. 
FossilOrigin-Name: 40b0a6357b160e04326ab176955a68a1cf3f8b7c
 2010-05-10 14:46:09 +00:00
drh
2905f053ef When running a checkpoint while in locking_mode=EXCLUSIVE, be sure to move 
the wal-index lock to UNLOCK from READ prior to promoting to CHECKPOINT.

FossilOrigin-Name: be114bdf9bb98c7287f8cb54340c630b0c412e9d
 2010-05-07 20:34:17 +00:00
drh
e874d9ed79 Change the xShmOpen() method of the VFS to take the database file name as 
its argument, not the WAL file name.  Also fix some unrelated compiler
warnings.

FossilOrigin-Name: a65c2939267ef6acec4e355a207f98f217e263d6
 2010-05-07 20:02:23 +00:00
dan
65f2ac58b6 Test another IO error case in wal.c. 
FossilOrigin-Name: 8b3b5ab8fa61ca4ef22c98abaab397707ee74ea3
 2010-05-07 09:43:50 +00:00
dan
998ad21271 Fix a problem with checkpointing large log files created by an external process. 
FossilOrigin-Name: 8f94bde568be52ecc5a976b7a09776ea7b4bb511
 2010-05-07 06:59:08 +00:00
dan
846705021d Since walIndexTryHdr() can no longer encounter any error conditions, change tehe function signature so that it does not return an error code. This removes unreachable branches from other code. 
FossilOrigin-Name: 061a282cc0bf76541ab1f99b351a49d489ff93ec
 2010-05-07 05:46:23 +00:00
dan
65be0d8cce Instead of transitioning to RECOVER state from CHECKPOINT when a recovery is required, perform the recovery while holding the CHECKPOINT lock. 
FossilOrigin-Name: bb0b6021e721c2e4f1533ab18381604c6b7b31d5
 2010-05-06 18:48:27 +00:00
dan
5273f58f37 If recovery is run before a checkpoint, change back to a CHECKPOINT lock before performing the actual checkpoint. 
FossilOrigin-Name: dc98ee169cfa43c89f1b36fb1150d4788710fda3
 2010-05-06 18:27:19 +00:00
dan
576bc3294d Only pass -1 as the size parameter to xShmGet when the caller does not care what size mapping is returned. Only call xShmSize when the underlying allocation (not the mapping) should be resized. 
FossilOrigin-Name: 637f51ddf9e4a57e1f171b6d2c6c93152074267e
 2010-05-06 18:04:50 +00:00
dan
b7d53f54ae Fix a bug whereby an old snapshot could be checkpointed (and subsequent transactions discarded) if the last connection to disconnect from a WAL database happended to be holding an out-of-date wal-index header. 
FossilOrigin-Name: d0c0034b0baa83046c1d6b94c886f7039e4e06f5
 2010-05-06 17:28:08 +00:00
dan
d41a29a653 Further coverage tests. 
FossilOrigin-Name: 98a9713e0030a36ea99a18a12a2e7685c6db72b3
 2010-05-06 15:56:28 +00:00
dan
a861469a07 Add tests to cover a couple of branches in wal.c. 
FossilOrigin-Name: 429f437fb776fc974a6adf791b729e25bea82fef
 2010-05-06 14:42:34 +00:00
dan
ff6dfc73fe Add tests for some lock-contention cases. 
FossilOrigin-Name: f0fcb9c9a67e2bf7bbedbedbc27791b605a21dd1
 2010-05-06 12:15:48 +00:00
dan
9a6b4e9adb Add test cases to test the libraries handling of corrupt wal-index headers. 
FossilOrigin-Name: 9465b267d420120c050bbe4f143ac824146a9e4a
 2010-05-06 11:32:09 +00:00
dan
8f6097c244 Add tests for handling errors returned by xShm VFS methods. 
FossilOrigin-Name: fbbcacb137e8f5246b88ad09331236aaa1900f60
 2010-05-06 07:43:58 +00:00
dan
c7991bdf29 Test the handling of errors returned by the xShmXXX() APIs. 
FossilOrigin-Name: 72663123d6be2b194cad7a6057d0f20dd0d9fe05
 2010-05-05 19:04:59 +00:00
dan
1018e90b1e When closing a WAL database, if the exclusive lock on the database file is obtained and the database successfully checkpointed, delete the wal-index file from the file system. 
FossilOrigin-Name: 2ac5d96c8e5831b392d83c86491d9ed8bc9c8db7
 2010-05-05 15:33:05 +00:00
drh
a8e654eb38 Be sure to release all wal-index locks before closing the wal-index. 
FossilOrigin-Name: b15b67fa14ff77963f470678ff6188c63be8e079
 2010-05-04 17:38:42 +00:00
drh
cd058ec4ef Relax an over-zealous assert() in sqlite3WalUndo(). 
FossilOrigin-Name: 8f9d22d58c75ad7476c1eea8ba296347e30b7beb
 2010-05-04 17:20:09 +00:00
drh
33bec22fb1 Take care not to invoke the xShmClose method of the VFS with a NULL 
shared memory object.

FossilOrigin-Name: 1465d3842c52aa7471f63deb47fe5b256d4e01c2
 2010-05-04 16:33:37 +00:00
dan
b6e099a973 Fix problems with recovering wal files that use a page-size other than the default. 
FossilOrigin-Name: 1a391f3c55dc9d4266552fa26d2a9839c6bafce4
 2010-05-04 14:47:39 +00:00
dan
ef37802545 Fix a typo in walfault.test. 
FossilOrigin-Name: 232dbe8ecec16485be5c5995fdf7a0ed951c2097
 2010-05-04 11:06:03 +00:00
dan
8d6ad1cc2c Test that the correct number of padding frames are appended to the log file after committing a transaction in synchronous=FULL mode. 
FossilOrigin-Name: a60104aa7e38e7d9f2ff2eae02687dc9c5dd5d77
 2010-05-04 10:36:20 +00:00
dan
76ed3bc044 Fix a couple of errors in WAL code that can occur in an OOM situation. 
FossilOrigin-Name: 9d3f3736be42ef8ab48b099d4712e08dfca97873
 2010-05-03 17:18:24 +00:00
drh
1fbe0f2a8f Change the VFS definition so that all methods take a VFS object pointer as 
their first parameter.

FossilOrigin-Name: 43b5b07f0d996d7ef7426346b1792e9ca898f487
 2010-05-03 16:30:27 +00:00
drh
2d536e187f Change the SHM interface so that it does not take the name of the shared 
object but rather the name of the WAL file and derives its own name from
that.  Remove the xShmDelete method from the VFS and replace it with a
delete flag on xShmClose.

FossilOrigin-Name: 94dea5f9c11a68564220cec76ac3fae2ba90e907
 2010-05-01 20:17:30 +00:00
dan
5cf53537a8 Support compile-time option SQLITE_OMIT_WAL, for building without WAL support. 
FossilOrigin-Name: 9b230c43dfa112e3e1589f9775926807bd36b36e
 2010-05-01 16:40:20 +00:00
dan
fe05aa144c Fix a problem with resizing the wal-index mapping after the mapping has been extended by an external process. 
FossilOrigin-Name: 79d356fea6008a8adf8ebd4906571375f3cf5213
 2010-04-30 17:05:23 +00:00
dan
c9d53dbe5a Fix a problem with calculating the required size of the wal-index when appending frames. 
FossilOrigin-Name: 9526b11130f3ed2f5227386a26263c767214603a
 2010-04-30 16:50:00 +00:00