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ebeffef36c5ad0e855cd208cc39989fc33511a6c
Commit Graph

145 Commits

Author SHA1 Message Date
drh
52fb8e1945 Faster memory allocation from lookaside by not trying to keep track of the 
number of outstanding allocations, and rather computing that value only
when requested.

FossilOrigin-Name: a06263f1efd2d45eac88b8d59e8fe8e458670fa3808c795feaa7f247fc36cbe9
 2017-08-29 20:21:12 +00:00
drh
b2a0f75c06 Remove the rarely-used scratch memory allocator. This makes the code smaller, 
faster, and easier to maintain.  In place of the scratch allocator, add the
SQLITE_CONFIG_SMALL_MALLOC configuration option that provides a hint to SQLite
that large memory allocations should be avoided.

FossilOrigin-Name: 54b000246cfb5c7b8adb61a17357ef5a49adddde9e48e8937834d5ba0beb8a6b
 2017-08-28 15:51:35 +00:00
drh
dbd6a7dc06 Split off sqlite3DbFreeNN() from sqlite3DbFree() and use it in cases where 
we know that the argument to be freed is never NULL.

FossilOrigin-Name: ad90e8bb5e47945607c8fb47b6ade8cfc52a9b684805cc40132629be0ecc14cc
 2017-04-05 12:39:49 +00:00
drh
a6bf20b587 Fix an error in the SQLITE_MAX_MEMORY implementation resulting from a bad 
merge.  Update the OSSFuzz interface so that it times out after running
the byte-code engine for 10 seconds.

FossilOrigin-Name: f8560c60d10c0365b33342ab05b5a953987b0471
 2017-03-10 17:03:11 +00:00
drh
1e45c7db56 Add the -DSQLITE_MAX_MEMORY=N compile-time option. The default is no limit. 
FossilOrigin-Name: eabd4ef498a0f0d97d65e321c4d06ab90523ed61
 2017-03-10 16:22:40 +00:00
drh
e43d6aee45 Add the SQLITE_MAX_MEMORY compile-time option that provides a hard upper bound 
on the amount of memory that SQLite will use, per process.

FossilOrigin-Name: 77dfe2abdae88dea81217f352d87e5ba2c822715
 2017-03-10 15:55:54 +00:00
drh
d879e3eb8d Change all legacy instances of "#if SQLITE_DEBUG" to "#ifdef SQLITE_DEBUG" for 
consistency.

FossilOrigin-Name: 670f10b24230863688270d12ac519609ade2302b
 2017-02-13 13:35:55 +00:00
mistachkin
40b84365e4 Typo fixes in comment. No changes to code. 
FossilOrigin-Name: c09dd5c0befaf5028abfead8114bd74a30ffe5d4
 2017-02-08 18:13:46 +00:00
drh
087a29c78b Always invoke the xRoundup() method of the memory allocator before calling 
xMalloc().

FossilOrigin-Name: 77b470b0df73dc5ae5ad2f0170ef7c50558c7c88
 2017-02-08 16:01:57 +00:00
drh
be7a0cee4e Fix the build for SQLITE_ENABLE_MEMORY_MANAGEMENT. 
FossilOrigin-Name: 8c85b8fdd7f0ba65fba83361d361a567b797a184
 2017-01-13 12:53:35 +00:00
drh
1d21bac8aa Avoid unnecessary calls to the xRoundup() method of the memory allocator when 
the soft heap limit is not set.

FossilOrigin-Name: 4209b89eab01814228a178963238e0dffffad2a4
 2017-01-10 16:09:46 +00:00
drh
1aa346950e Avoid a potential (harmless) signed integer overflow in memory usage 
accounting when calling sqlite3_realloc() to reduce the size of an
allocation.

FossilOrigin-Name: 2d71cbdf6bc24f0269027c70b39ea7f342436bdb
 2016-12-27 12:08:36 +00:00
drh
cee11adaaa Small size reduction and performance increase in the string duplicator. 
FossilOrigin-Name: cda998f080cb00779d8c0d1c83d8fe2b74462cd4
 2016-10-17 00:48:06 +00:00
mistachkin
fad3039c51 Enhance ability to debug out-of-memory errors. 
FossilOrigin-Name: 6a9c4a3ebfb7cc0738ef6634440ccab44a21ff28
 2016-02-13 23:43:46 +00:00
drh
f5818aa560 Make sure variable declarations occur at the beginning of blocks, even 
with SQLITE_DEBUG enabled.

FossilOrigin-Name: 2f7778e64d93ef237e23ceac01ea9808df5cf2a1
 2016-02-06 19:48:50 +00:00
drh
575fad6500 Add the slightly faster sqlite3DbMallocRawNN(db,n) routine for the majority 
cases where db is guaranteed to be not NULL.

FossilOrigin-Name: 0a802e96ab06e2643834b83671fa8353da1a348d
 2016-02-05 13:38:36 +00:00
drh
b84e574c89 Further performance improvements that fall out of the mallocFailed changes. 
FossilOrigin-Name: d94416ddca8f7ed727dd335d38155ea5945a86b7
 2016-02-05 02:42:54 +00:00
drh
4a642b6060 Improvements to the way that OOM errors are processed. 
FossilOrigin-Name: c3ef03478a5788c855b3aef385d43ae7f494f440
 2016-02-05 01:55:27 +00:00
drh
1da26a48dd Performance improvement in sqlite3DbMallocRaw(). 
FossilOrigin-Name: ff8eadbed5004ab03438f737492387dee6b9750a
 2016-01-20 03:36:32 +00:00
drh
ac536e613a Move pointer range comparisons into a macro, where they can be dealt with 
in a more portable way.

FossilOrigin-Name: ad3124c834b080aaaf24934d6f08b3601ac3ae53
 2015-12-10 15:09:17 +00:00
drh
56d90be183 Remove an unreachable branch in malloc.c. 
FossilOrigin-Name: a36b7fe92372a13ff0b6e08f1704496045c6f62a
 2015-10-26 12:55:56 +00:00
drh
59a052359d Remove a superfluous conditional from the memory allocation initialization. 
FossilOrigin-Name: 9ccf8f8d35723f2a9b59010b6d5f37a14164a188
 2015-10-15 17:21:35 +00:00
drh
039ca6ab59 Performance optimizations to the sqlite3MallocSize() by requiring the 
argument to always be non-NULL.

FossilOrigin-Name: cb65989b0710c65e4df69063b346344fdb1d12c7
 2015-10-15 16:20:57 +00:00
drh
b02392e6f0 Change sqlite3StatusSet() into sqlite3StatusHighwater() so that only the 
highwater mark is recorded.  This gives a small size reduction and
performance improvement.

FossilOrigin-Name: 6422d223dd10018703c6b083d29a3c35c837fc97
 2015-10-15 15:28:56 +00:00
drh
5fb72e5f3e No-op the sqlite3_memory_alarm() interface in a different way, that does 
not break legacy memory behavior.  This is a re-do of
check-in [5d3f5df4da9f40d5].

FossilOrigin-Name: 8250e2a487ee12c9a2dea5603ab60aed51e5dc7b
 2015-09-10 01:22:09 +00:00
drh
4ef299a32c The sqlite3_memory_alarm() interface has been deprecated and undocumented 
for almost 8 years (since version 3.5.3).  Change it into a no-op.

FossilOrigin-Name: 5d3f5df4da9f40d5897b5c23b2ea9333fc18ac2c
 2015-09-02 14:56:56 +00:00
drh
054bbabc76 Small size reduction and performance increase in sqlite3DbMallocSize(). 
FossilOrigin-Name: 8a80967f849eed002a701235ed7fb406099d566e
 2015-09-01 20:09:33 +00:00
drh
01c5c00c12 Preserve the number of requested PAGECACHE pages even if the memory pointer 
or size is zero.  Enhance the pcache1.c header comment to explain the memory
layout of a page cache line.

FossilOrigin-Name: dacb2a615ce1c0573baf4518000454038745cf2a
 2015-07-04 18:15:04 +00:00
drh
597d2b6412 Change sqlite3ApiExit() so that its first argument is never NULL. 
FossilOrigin-Name: 791b706ec6c3e80885666e48e01524f0e9a7557e
 2015-06-30 03:13:47 +00:00
drh
22c17b8bf5 Simplifications to error message processing. Fix a possible problem in error 
message formatting when vacuuming a database with a corrupt schema.

FossilOrigin-Name: 56ef98a04765c34c1c2f3ed7a6f03a732f3b886e
 2015-05-15 04:13:15 +00:00
drh
df5e1a00de Fix the sqlite3_memory_used() and sqlite3_memory_highwater() interfaces so 
that they really do provide a 64-bit answer.

FossilOrigin-Name: 8a0d5d5e9a4515603c47e9354af47550155a6f2d
 2015-05-10 02:01:08 +00:00
drh
592f0cb15e Avoid leaving the malloc subsystem in a partially initialized state if 
the low-level initialization callback fails.

FossilOrigin-Name: 3e872011ff5e27738c282f46d2b5803d94fe4b76
 2015-03-26 17:04:23 +00:00
drh
af89fe66ea Add the sqlite3_status64() interface. Make the new interface and the legacy 
sqlite3_status() both atomic and threadsafe.  Check threadsafety using
assert()s.

FossilOrigin-Name: 1ce8e8fa4b866aafa12b1da0eb4d02321af9293e
 2015-03-23 17:25:18 +00:00
mistachkin
d425864d33 Fix harmless compiler warnings with MSVC when assert() and SQLITE_MEMDEBUG are both enabled. 
FossilOrigin-Name: 9513dbd4860c8dd391f831982d09aff227d16f5c
 2015-03-21 23:38:59 +00:00
drh
cbd55b0362 Change the definition of SQLITE_CONFIG_SCRATCH so that at most one scratch 
buffer is used per thread.  Use the generic heap memory allocator for the
WalIterator object when running a checkpoint.

FossilOrigin-Name: 391c9b85abcb5ba300fb2e116384639310c69ed2
 2014-11-04 14:22:27 +00:00
drh
d231aa3a42 Enhance (and fix) the MEMTYPE tags associated with heap memory allocations 
when SQLITE_MEMDEBUG is used.

FossilOrigin-Name: ca5b789e33c4e5ce366d8f5372d086442f84e230
 2014-10-07 15:46:54 +00:00
drh
8da47419dd Update to requirements marks related to changes in the memory allocation 
interface and enhancement of the documentation regarding DEFAULT clauses
in CREATE TABLE.

FossilOrigin-Name: 440705b98a3429b830ea85e71cc1e414bc6d8058
 2014-10-03 14:54:47 +00:00
drh
17bcb10299 Add the Mem.szMalloc element to the Mem object and use it to keep track of 
the size of the Mem.zMalloc allocation.

FossilOrigin-Name: 9c09ac353df6041808cace41880f4729ee73f5e1
 2014-09-18 21:25:33 +00:00
drh
20f3df046a Fix harmless warnings on 32-bit MSVC builds. 
FossilOrigin-Name: 5192f964b2a85459553f1cea741b9791606ccc4e
 2014-09-18 02:20:54 +00:00
drh
3329a63ac5 Fix compiler warnings and change the nullMem structure initializer into a 
format that MSVC can understand.

FossilOrigin-Name: 163bfae8583b2d3002a3a43d6bf8a66fefd73acb
 2014-09-18 01:21:43 +00:00
drh
da4ca9d19c Add new APIs that take 64-bit length parameters: 
sqlite3_malloc64(),
sqlite3_realloc64(),
sqlite3_bind_blob64(),
sqlite3_bind_texte64(),
sqlite3_result_blob64(),
and sqlite3_result_texte64().
Internal memory allocation routines also now use 64-bit unsigned length
parameters for safety.
Also add the sqlite3_msize() interface.
Fix the sqlite3_get_table() to use sqlite3_realloc64() to avoid a
integer overflow problem.

FossilOrigin-Name: 94954850cf2e1ec0b7f590c7f46cdc54c72558ce
 2014-09-09 17:27:35 +00:00
drh
b50c65d561 Faster implementation of the sqlite3ApiExit() routine. 
FossilOrigin-Name: bd41d394d48516eb7d8ddc46abdcb427aa80173e
 2014-08-23 20:25:53 +00:00
drh
b4586f1254 Another memory allocator performance optimization. 
FossilOrigin-Name: 6da6f46d0c43e3b68c21f514ddf8ee663c20f249
 2014-08-23 19:42:06 +00:00
drh
3ccd5bf89e Changes to sqlite3ScratchMalloc() that make the entire memory allocation 
interface a little faster and about 100 bytes smaller.

FossilOrigin-Name: f83daa16f65ef35062412e88c214852a4aeb3da2
 2014-08-23 19:04:55 +00:00
drh
13f40da31d Split the sqlite3Error() routine into sqlite3Error() and 
sqlite3ErrorWithMsg(), for a slight size reduction and performance increase.

FossilOrigin-Name: cf561d1f0bb60b3d638632d20bd686dda4fa4a04
 2014-08-22 18:00:11 +00:00
drh
b0e7704e9f Simplify and improve the performance of the sqlite3VdbeMemGrow() routine. 
FossilOrigin-Name: 48ecf18774ba9572d86696c60d87007a619d9f53
 2013-12-10 19:49:00 +00:00
drh
9ccd8659ff Change the PRAGMA parser to use a binary search for the pragma name. 
Also:  Minor performance enhancement to sqlite3DbFree() and to the
token dequoter.

FossilOrigin-Name: 870c030b4e1854e6e0d39907fadbd82774c16f56
 2013-09-13 16:36:46 +00:00
drh
3608f177ba Make sure lookaside memory allocations are unusable after they are freed. 
FossilOrigin-Name: 3869aef6348018f584137f36f6924193a790e52f
 2012-05-21 16:59:16 +00:00
drh
de0f18154e Check the return code from sqlite3_initialize() called from within 
sqlite3_soft_heap_limit64() and return an error from sqlite3_soft_heap_limit64()
if sqlite3_initialize() fails.

FossilOrigin-Name: 676acce274fec692a1eb34d27ee4b1327b4b3334
 2011-12-22 17:10:35 +00:00
drh
2e5a422eee Fix a bug in memory usage tracking that was introduced by 
check-in [4e33a0eaf83922].

FossilOrigin-Name: 8ba456ae0b3d0c0b6f72f98bd0bc28f72dfa4ff5
 2011-05-05 17:00:51 +00:00