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27,211 Commits 1,607 Branches 185 Tags
8dd4697e48c04a405c9c8da4a68b948e45b1f159
Commit Graph

379 Commits

Author SHA1 Message Date
drh
783e159e48 Fix harmless compiler warnings. 
FossilOrigin-Name: 92dc59132f8547635d73c61c21ea29b380c401ddc84a6d01412808e00386b9e8
 2020-05-06 20:55:38 +00:00
dan
7bb8b8a4f7 Add error code SQLITE_BUSY_TIMEOUT, used internally by the OS layer to indicate that a call to xShmLock() has failed due to timeout of a blocking lock. 
FossilOrigin-Name: f3ef9c7c2b4ba3de1057ad569f068b241d5f23e6629d8e0dacf85e57fd13b8aa
 2020-05-06 20:27:18 +00:00
dan
fc87ab8c4a Fix compiler warnings in non-SQLITE_ENABLE_SETLK_TIMEOUT builds. 
FossilOrigin-Name: 22de99ef410ba2a540871f3e61157d8dc4b969416f14808aeca73971b17fcd51
 2020-05-06 19:22:59 +00:00
dan
861fb1e9dc Block on the WRITER lock when attempting to run recovery. 
FossilOrigin-Name: 105d6c9bbcadc64faa2b24e315cb13227b17cfc6bf1b3512713f80ce56976a3d
 2020-05-06 19:14:41 +00:00
dan
d0e6d13301 Add tests for running recovery when opening a write transaction or performing a checkpoint with blocking locks enabled. Fix some failing assert() statements. 
FossilOrigin-Name: d096ea3fe20f8af90f9e3f798fd0a69527b32ac8e208ade58b9d0af0e831f41b
 2020-05-06 17:18:57 +00:00
dan
58021b237a Unless upgrading an existing read transaction, have ENABLE_SETLK_TIMEOUT builds attempt to use a blocking lock when opening a write transaction on a wal mode database. 
FossilOrigin-Name: d6f819a9e6b35f3fd558bd93255a6a24ad690a0fa15a82b009ca9c641db983c6
 2020-05-05 20:30:07 +00:00
dan
8714de97c0 Changes to avoid deadlock in SQLITE_ENABLE_SETLK_TIMEOUT builds. 
FossilOrigin-Name: 553423c23142cf0ec219192315d57ce8a0e10c3d8678d28bc110a1a9a7c17cee
 2020-05-04 19:42:35 +00:00
drh
fcf31b28ff Add the SQLITE_FCNTL_CKPT_START file-control. Use it to optimize the 
cksumvfs extension.

FossilOrigin-Name: b40f5aa344ae10cf4da83b3aa9e4866d6f6ffb06ba7e34ec1ce80c92468cf3bf
 2020-05-01 18:37:34 +00:00
dan
892edb69c4 Use __atomic_load_n() and __atomic_store_n() for a few more things where they are available. 
FossilOrigin-Name: a49f8ec552bede7da731e0571ccf49de1a30e7be3a5673150436c8b411ba6ffc
 2020-03-30 13:35:05 +00:00
dan
3e42b99175 Fix "GCC_VESRION" typo in wal.c. 
FossilOrigin-Name: fbd9378727141848ba2f5a8eee3076ecbd315e4a87b264c6d890103d56b2e4bc
 2020-03-30 11:17:37 +00:00
dan
97ccc1bd11 Modifications to the way blocking locks are used in SQLITE_ENABLE_SETLK_TIMEOUT builds so that multiple processes or threads may not deadlock when operating on a single database. 
FossilOrigin-Name: c516027d5fd876b7d0bf566435667d554db29ded30ad6fc1165caa4a93d015a0
 2020-03-27 17:23:17 +00:00
drh
b48c0d59fa Simplify the code by removing the unsupported and undocumented 
SQLITE_HAS_CODEC compile-time option

FossilOrigin-Name: 5a877221ce90e7523059353a68650c5fdd28ed032807afc2f10afbfbf864bdfe
 2020-02-07 01:12:53 +00:00
dan
1d7d8c8f74 Add the SQLITE_FCNTL_CKPT_DONE file-control for the use of custom VFSs. 
FossilOrigin-Name: 3cc39e5069c8a6a32ecc49c571593615c0f347cadcd3e0325b7f9a11ddc1f546
 2020-01-16 16:32:57 +00:00
drh
2ecf928ea9 More details on the comment justifying the aleged data race in the WAL-mode 
checkpoint logic.

FossilOrigin-Name: 0fab65c79f675c825ed7e85c82b65ce6f990c9d0796ebb3886942d241df7b268
 2019-11-27 20:40:44 +00:00
drh
55f66b341a Add new assert() statements in an attempt to help static analyzers avoid 
false-positives.

FossilOrigin-Name: 9e66458592d40fbd96ea5f21339573110ca1cfe328238a020c9420a87d35dd72
 2019-07-16 19:44:32 +00:00
drh
680f0fe32a Small performance and size optimization in sqlite3WalFindFrame(). 
FossilOrigin-Name: 03f2e78899fad99b0a0951b3a408268276954d4cd785389ed9a0192c9217f6fe
 2019-04-17 21:12:05 +00:00
drh
f6ad201ac2 Fixes for harmless compiler warnings. 
FossilOrigin-Name: c28c973ad6debd63f13e5d4d3da036f680baaec9d863eda039f2747db9f1cfd5
 2019-04-13 14:07:57 +00:00
drh
b92d7d264e Add a defense-in-depth NEVER() test to the WAL cleanup code. 
FossilOrigin-Name: 8d3af2010f4f652865f5c0d18e3bc793de05f8e75e75cc77786f61004b2ad28f
 2019-04-03 17:48:10 +00:00
drh
8741d0ddb0 Fix a harmless compiler warning that arose from the ENABLE_CURSOR_HINTS 
fix of check-in [0af18674ca5b34e67e]

FossilOrigin-Name: f578e62ae6f6cc78d8281adab9fa93f3f58711879c2860bbe19f291d257dc0af
 2018-09-12 00:21:11 +00:00
dan
8d4b7a3fa8 If a call to sqlite3_snapshot_open() fails because the requested snapshot no 
longer exists, return SQLITE_ERROR_SNAPSHOT instead of SQLITE_BUSY_SNAPSHOT.

FossilOrigin-Name: e07923128bb164efbafde29d49175b61f2ef44b2dfac5ae4ed61937945dfcf4c
 2018-08-31 19:00:16 +00:00
drh
876c7ea3fa Try to identify the places in WAL code where thread-safety depends on the 
underlying architecture supporting atomic load and store of aligned 32-bit
values.

FossilOrigin-Name: 47d44be4a68d377d0049a12b2587dbbcc0870b469473e1098f7c0358fe8c7532
 2018-08-30 20:28:18 +00:00
dan
f5778751f7 Fix a problem causing spurious SQLITE_CORRUPT errors when using the snapshot 
API to read from old database snapshots.

FossilOrigin-Name: 535155be584ad8c1836e6b1c62de836d9872056d39608c995221c928cb5b365d
 2018-08-28 11:23:52 +00:00
dan
588032fe33 Allow sqlite3_snapshot_open() to be called to change the snapshot after a read 
transaction is already open on database.

FossilOrigin-Name: 41399169954f9bef53c3fa89879f39823b80bd127f76cf60abbe24217878a571
 2018-08-15 14:03:26 +00:00
mistachkin
6389a7b0ac Minor style improvements. 
FossilOrigin-Name: 60bbca2b9a591800cd8e7b374e62d75b1df0e8fd2d2f71f9b4d5fd044da78be0
 2018-08-08 20:46:35 +00:00
dan
fa3d4c19a9 Allow sqlite3_snapshot_open() to be called to change the snapshot after a 
read transaction is already open on database.

FossilOrigin-Name: 051ac0152048ef52723196c26ca5f2629dafb782aec1c66fc30531bf54335043
 2018-08-06 17:12:36 +00:00
drh
4ece2f2657 Slightly smaller and faster code by encapsulating wal-index hash table 
location information in a separate WalHashLoc object rather than passing
around the various elements as separate variables.

FossilOrigin-Name: 538a365b7a32ab7fa84f59d7556242cfb59b76d287b6417eb3a823197a354e8e
 2018-06-09 16:49:00 +00:00
drh
49cc2f3b9c Fix walIteratorInit() so that it always leaves the iterator as a NULL pointer 
if an OOM occurs.  This fixes an assertion fault introduced by 
check-in [044b0b65e716bff].

FossilOrigin-Name: e5ce256aa1f7a8ae995b79c9da895827bee5d8d0724fc15413ff203dc9e2602d
 2018-03-05 23:23:28 +00:00
dan
f0cb61d6c2 In a checkpoint, figure out if it is possible to checkpoint any frames at all 
before creating the wal-iterator.

FossilOrigin-Name: 044b0b65e716bffeddedbd1b0360c4c332f6d2359167c1d327a5ff96539474cb
 2018-03-02 16:52:47 +00:00
dan
302ce47519 Optimize the obscure case of running a checkpoint against a very large wal 
file for which a large percentage of the frames have already been checkpointed.

FossilOrigin-Name: 0f5057dffa9be1bccab04894709d25bf1f066c4b1aef50d67ee635d46d300a4d
 2018-03-02 15:42:20 +00:00
drh
c0ec2f7762 Remove an unreachable branch in the walIndexPage() logic. 
FossilOrigin-Name: 4e61a9731f5949dcf05c541106b56be16add04a7730613481fc8519d3e4f493b
 2018-02-21 01:48:22 +00:00
drh
8d3e15eec4 Small performance improvement in sqltie3WalFindFrame(). 
FossilOrigin-Name: 52013cad0e6ce2d694f25e2984a76d438cef724f0e07c8bb9d3dce8a3caf4350
 2018-02-21 01:05:37 +00:00
drh
2e178d7321 Make the walIndexPage() routine about 3x faster by factoring out the seldom 
used reallocation logic into a separate subroutine.

FossilOrigin-Name: e2b107141cd97bd4ab240748a9ce43fc2ec950ea74610697a4a7a3d7a6441e6b
 2018-02-20 22:20:57 +00:00
dan
05573e41a8 Lock the wal file for all snapshot transactions, even if they would not 
otherwise require this, preventing checkpointers and writers from wrapping the
wal file. This means that if one connection has an open snapshot transaction
it is guaranteed that a second connection can open a transaction on the same
snapshot.

FossilOrigin-Name: b81a31495bd27c1d96f7df653da3502054240cb5acf66b860da7f0f9b422a524
 2017-11-28 13:39:41 +00:00
drh
8b17ac1919 Improvement to a comment. No changes to code. 
FossilOrigin-Name: 486949fc03706e0056439b52ce60931ea4ce0a65e391da7f6287fe13862de251
 2017-11-14 03:42:52 +00:00
drh
2e9b0923ac Remove some branches in walTryBeginRead() that were 
added by check-in [ce5d13c2de] but became unreachable with the addition
of logic in check-in [18b26843] that enabled read-only clients to parse
the WAL file into a heap-memory WAL-index, thus guaranteeing that the 
WAL-index header is always available.

FossilOrigin-Name: 9c6b38b9a96c11bdf9db4ea025720a4f49dcb723fa2e2776edc8453bce85c7e3
 2017-11-13 05:51:37 +00:00
drh
c05a063c68 In wal.c: improved comments, new assert() and testcase() macros, and 
replace some magic numbers with appropriate symbolic constants.

FossilOrigin-Name: 13ec8a77a47aa471af587459f4094da0d06674c5960f0d34777bcb3d38bc413b
 2017-11-11 20:11:01 +00:00
drh
870655bb9e Further comment improvements in wal.c. No code changes. 
FossilOrigin-Name: 346388007de585083dc67ad865b91db7c7d7b78c10a06f8bb7c48767c326c47e
 2017-11-11 13:30:44 +00:00
drh
85bc6df2f1 Improved comments and variable names in the read-only WAL logic. 
FossilOrigin-Name: d3c25740eec9a2a41c29e6e488fcf6587c1fb821147a442c29439b25a92154a5
 2017-11-10 20:00:50 +00:00
drh
9214c1efe8 Extra comments on the sqlite3OsShmMap() call in walBeginUnlocked(). No 
changes to code.

FossilOrigin-Name: 033ee92bf4d5dc57f5cb8fd02d1154ae06f2d3261d214e7191a82c70c8ffebf7
 2017-11-08 19:26:27 +00:00
drh
7e45e3a5d7 Change the name of SQLITE_READONLY_CANTLOCK to SQLITE_READONLY_CANTINIT. 
FossilOrigin-Name: 6d7f94faa7e6de62f82bc6cac019508a9c1ffd6fa1d14f52fa93e9c06afdd32f
 2017-11-08 17:32:12 +00:00
dan
6c9d8f640b Update an assert in wal.c. 
FossilOrigin-Name: 94527b897bac66d100ca92161f18b6f0e0768dd77ebcb06e3fb106f0e0e380ee
 2017-11-07 21:25:15 +00:00
dan
08ecefc5b1 Handle the race condition that may occur if another process connects and then 
checkpoints and truncates the wal file while a readonly-shm client is building
its heap-memory wal-index.

FossilOrigin-Name: 5a6703fc3f2174b3e9a624c7272ae013b73c42d6c97ffa62b58553efdb54e3bc
 2017-11-07 21:15:07 +00:00
dan
ab54838452 Add further test cases for the new code on this branch. And a couple of fixes. 
FossilOrigin-Name: 71af9acb227a91d9ad8798c9d0b12d6967e863d050f5cb1fddb45f25ee1f47db
 2017-11-06 19:49:34 +00:00
dan
cbd3321978 Add further tests for the code added on this branch. 
FossilOrigin-Name: a6716fcde38b28b8a03b40f9d16f78a57ec20f60cf391ff553692641cb7f0d3f
 2017-11-04 21:06:35 +00:00
dan
11caf4f4b7 In cases where a readonly_shm client cannot take the DMS lock on the *-shm 
file, have it parse the wal file and create a wal-index to access it in heap
memory.

FossilOrigin-Name: 18b268433d739486eac1b04947bd418655e4bc56e8dc63ffa558aa4552a32e30
 2017-11-04 18:10:03 +00:00
dan
dea5ce36f5 Avoid locking shm-lock WAL_READ_LOCK(0) during recovery. Doing this allows 
recovery to proceed while a readonly_shm connection in unlocked mode has an
ongoing read transaction.

FossilOrigin-Name: 5190d84a296b7cf716ef43bf7b6d4d351ef1a4d650de37dc01a5ab333da7c05d
 2017-11-02 11:12:03 +00:00
dan
92c02da33e If a readonly_shm connection cannot map the *-shm file because no other 
process is holding the DMS lock, have it read from the database file only,
ignoring any content in the wal file.

FossilOrigin-Name: ce5d13c2de69b73378637d4f7e109714f7cd17bf1d1ad995e0be442d517ed1b3
 2017-11-01 20:59:28 +00:00
drh
183f0aa6c4 Fix a minor comment typo. No changes to code. 
FossilOrigin-Name: 5f79e6d9c3d44b0cc7cf805429006f7b29a69e8d863b58472172a56b29a7bb4e
 2017-10-31 12:06:29 +00:00
drh
07dae088b9 Clarify some comments describing the WAL index file. No changes to code. 
FossilOrigin-Name: 3be3aad9ecbe33060cfa9c6059b9206ed221d1fd72a69c355a9387f9f4e075e7
 2017-10-30 20:44:36 +00:00
dan
21f2bafd9b Experimental change so that snapshot transactions always lock the wal file - 
preventing writers or truncate-checkpointers from wrapping it.

FossilOrigin-Name: d71eeaab9ecdeed772047498b781be1f0be0655af284b94cf676bb408ceea8b1
 2017-09-23 07:46:54 +00:00