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5c118e3946b941ade486d10f4ec2f13efbecd76d
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731 Commits

Author SHA1 Message Date
drh
5128d009c6 Improvements to the robust_open() logic in the unix VFS so that if an attempt 
is made to open a repository on file descriptors 0, 1, or 2, and blocking
that file descriptor by opening it on /dev/null fails, then the open will
fail.

FossilOrigin-Name: d9c018f8155ab48df8e0e02519bba50588fe49fc
 2013-08-30 06:20:23 +00:00
drh
35a0379a05 Change the unix VFS so that it refuses to open a database file using 
a file descriptor less than 3.

FossilOrigin-Name: 66dddda06898abbf97fe0ac6a10ce1527ca8605e
 2013-08-29 23:34:53 +00:00
drh
0c9a8e345e Never leave an open file descriptor pointing into the middle of the 
database file if the file descriptor number is 2 or less.

FossilOrigin-Name: 3426673e4659eb68dbd14a3e41d4620d748432db
 2013-08-29 21:26:26 +00:00
mistachkin
09b404419a Merge updates from trunk. 
FossilOrigin-Name: 9d6860098f96efc7ea60e2d6116fb7d0e2685a55
 2013-08-26 19:36:18 +00:00
dan
4dd5144366 Fix for builds with both SQLITE_OMIT_WAL and SQLITE_MAX_MMAP_SIZE=0 defined. 
FossilOrigin-Name: edd5dbdc3239fc88799b822941603fcc828ecbb6
 2013-08-26 14:30:25 +00:00
mistachkin
b5ca3cbcd3 Fix a couple compilation issues on Unix. 
FossilOrigin-Name: 25b029d8f32440a94ef8af45153423f6702d7431
 2013-08-24 01:12:03 +00:00
mistachkin
e98844f723 Unify the result of PRAGMA mmap_size when mmap support is disabled. 
FossilOrigin-Name: 032c31593d6f569842830cac6222362be68b2084
 2013-08-24 00:59:24 +00:00
drh
b01e5b59a2 Disable posix_fallocate() for all systems, all the time, unless the 
HAVE_POSIX_FALLOCATE compile-time macro is supplied.

FossilOrigin-Name: b674462243138fcee192ef05d434665e30c681c4
 2013-06-20 14:07:37 +00:00
drh
2daffdf0b5 Only default HAVE_POSIX_FALLOCATE on for linux, and then only if it is not 
previously defined.

FossilOrigin-Name: 2b2ade92788be623af6f57e37d98994be2cec142
 2013-06-19 14:49:14 +00:00
drh
7fb1b30118 Only enable posix_fallocate by default on linux and mac. 
FossilOrigin-Name: b9b30d4f9845d212e2d3206abbf2795099e5d71d
 2013-06-19 14:28:34 +00:00
drh
34e258c942 Cause the mmap_size PRAGMA to immediately change the mmap space if the 
database connection is already active.  In particular, reducing mmap_size
will immediately free up process address space.

FossilOrigin-Name: 761177927cb51e4f5e66061ca39cf37edbe8346b
 2013-05-23 01:40:53 +00:00
dan
ede01a97d3 In os_unix.c and os_win.c, initialize the default mmap-limit of a new file descriptor to the current global default mmap-limit, not the current global maximum allowable mmap-limit. 
FossilOrigin-Name: 1def4ea3a02afc19648f4cd928b247f8fa55da80
 2013-05-17 12:10:52 +00:00
drh
6cf9d8d63a Add assert()s to the implementation of xRead() in the built-in VFSes to 
verify that the offset parameter is always non-negative.

FossilOrigin-Name: cf5c3642247fdd34d87f0368594cd7b8f081636a
 2013-05-09 18:12:40 +00:00
dan
32c12fe2bb Minor fixes for compilation with SQLITE_OMIT_WAL defined. 
FossilOrigin-Name: b81e87e72b976e7157a53a50abc5422e2a6c4c39
 2013-05-02 17:37:31 +00:00
drh
c5797545de Untested fix for building on VxWorks. 
FossilOrigin-Name: f14d55cf358b0392d3b8cd61dc85f43a610a8edf
 2013-04-27 12:13:29 +00:00
dan
47a2b4a0b0 Avoid using posix_fallocate() in WAL mode, as it is not supported by all file-systems. 
FossilOrigin-Name: 9c7523dabf4aee609287732ce787c9b9a9087e7f
 2013-04-26 16:09:29 +00:00
drh
da8caa0b2d Fix harmless compiler warnings. 
FossilOrigin-Name: 1a1cf5aa86734c832d845e07780262a178188d56
 2013-04-22 23:38:50 +00:00
drh
9b4c59fa1b Refactoring the mmap interface. The controlling pragma is now "mmap_size" 
instead of "mmap_limit".  Also change SQLITE_CONFIG_MMAP_LIMIT and
SQLITE_FCNTL_MMAP_LIMIT to SQLITE_CONFIG_MMAP_SIZE and
SQLITE_FCNTL_MMAP_SIZE, respecctively.  
The default mmap_size is now always 0, meaning that
memory mapped I/O is off by default.  There is a new compile-time option
SQLITE_MAX_MMAP_SIZE that determines a hard upper bound on the mmap_size.
Setting SQLITE_MAX_MMAP_SIZE to zero disables the memory-mapped I/O logic
and causes it to be omitted from the build.  An extra argument is added
to SQLITE_CONFIG_MMAP_SIZE that can optionally lower the SQLITE_MAX_MMAP_SIZE
at start-time. The SQLITE_MAX_MMAP_SIZE is zero for platforms where we 
know that it does not work, meaning that it cannot be turned on by mistake
on those platforms.

FossilOrigin-Name: ea1404a10abd7f68e1f8e0708c8a3199d1f79665
 2013-04-15 17:03:42 +00:00
drh
fbc7e8845d Have the UNIX VFS issue warnings via sqlite3_log() if a database file is 
renamed or unlinked or linked to more than one name while the file is open.

FossilOrigin-Name: e238dcf9189c029fbdcf89339e21d9cdd8fbf2c5
 2013-04-11 01:16:15 +00:00
drh
6e0b6d52da Add extra #ifndef statements in os_unix.c and os_win.c to make sure the 
memory mapped I/O really is disabled when SQLITE_DISABLE_MMAP is set.

FossilOrigin-Name: c1e2523c9051782569291fff998140f7e0b70b6d
 2013-04-09 16:19:20 +00:00
dan
bcb8a868ce Handle the case in os_unix.c where SQLITE_FCNTL_MMAP_LIMIT requests that the mmap limit be set to a value smaller than the current mapping. 
FossilOrigin-Name: 360473493ec1a7094a2b1c5436f3b70914a6dfdd
 2013-04-08 15:30:41 +00:00
drh
34f7490311 Change the mmap_limit pragma to report the new limit, or to report the 
existing limit if called with no arguments.  Report the default mmap_limit
as part of PRAGMA compile_options.  Set the default mmmap_limit to 0 for
all systems other than linux, mac, windows, and solaris.

FossilOrigin-Name: 2d9f1327fe79e40435ce1e2594d7cd9a5aea0ef2
 2013-04-03 13:09:18 +00:00
drh
2b8246e3e2 Initialize the mmap_limit of temporary files to the configured mmap_limit. 
FossilOrigin-Name: 24bab7596bb7385981a5d331df5eeb05353547f7
 2013-04-03 10:50:02 +00:00
drh
85830a70c2 Fix the unix driver to check defined(_BSD_SOURCE) rather than just the plain 
_BSD_SOURCE macro.  This fixes the build for OpenBSD.

FossilOrigin-Name: 1dd42ef4144ee08fb4ee1676d934a56a0e34bac2
 2013-04-03 00:42:01 +00:00
dan
48ccef8059 Fix a resource leak in os_unix.c. 
FossilOrigin-Name: b29cda03fe4e8d8f5b5acbbea2d69f284a2bdf23
 2013-04-02 20:55:01 +00:00
dan
4ff7bc45c6 Add test cases for errors in mmap() or mremap() is os_unix.c. 
FossilOrigin-Name: 3098a3c1e7305033904a496ef534cb312a876fab
 2013-04-02 12:04:09 +00:00
drh
3861f546e3 Remove a debugging printf() accidently left in the previous check-in. 
FossilOrigin-Name: 8198cdd8ac5dcc1c677fffa869ac965186b96abf
 2013-04-01 22:42:48 +00:00
drh
a1f42c7c32 Add the SQLITE_CONFIG_MMAP_LIMIT configuration option for overriding the 
SQLITE_DEFAULT_MMAP_LIMIT compile-time setting.  Enhance "PRAGMA mmap_limit"
so that without a specific database name, it sets the limit on all database
files and changes the default for any future databases that might be added
using ATTACH.

FossilOrigin-Name: 78141d0a16dd1d56b575fccd149de7fa789cb06c
 2013-04-01 22:38:06 +00:00
dan
e6ecd6630d Attempt to emulate mremap() on non-Linux systems by allocating a second mapping immediately following the first in virtual memory. 
FossilOrigin-Name: 4d67433db8fb4754ae6b192945e479f3d7bad579
 2013-04-01 17:56:59 +00:00
drh
6c5696381e Fix a comment in os_unix.c. No code changes. 
FossilOrigin-Name: 72813b8ec924b91583c679668f7c4561dff82a02
 2013-03-26 18:48:11 +00:00
drh
0d0614bdc6 Memory-mapped I/O is now on by default. The "PRAGMA mmap_limit(N)" can be 
used to issue a hint to the VFS to limit mmap space to N bytes.  The VFS
is free to ignore that hint if desired.  However, if "PRAGMA mmap_limit(0)"
is used, xFetch is never called.

FossilOrigin-Name: 1b37c4effdd03aa2ea938a71b4f22ed27391689b
 2013-03-25 23:09:28 +00:00
drh
d1ab8065c1 Add munmap and mremap to the set of os interfaces that can be overloaded 
in os_unix.c.

FossilOrigin-Name: 8776047bd776bbf266eb9c3b56683badb84ae73e
 2013-03-25 20:50:25 +00:00
dan
b7e3a326fe Use mremap() on Linux. 
FossilOrigin-Name: 431aecc8600c29c203546e48d256510510238887
 2013-03-25 20:30:13 +00:00
drh
dee6554811 Merge all recent trunk changes into the experimental-mmap branch. 
FossilOrigin-Name: a607d63f0b6a3d3785e9385187d3e6b92e14fc70
 2013-03-25 19:57:26 +00:00
dan
893c0ffc29 Add a test that simulates an error in mmap(). 
FossilOrigin-Name: 6ec7367d8e98425f00eeb8215ca8964313c1d0b7
 2013-03-25 19:05:07 +00:00
dan
df737fe6f5 Change the signature of the xUnfetch method to "int (*xUnfetch)(sqlite3_file*, sqlite3_int64 iOfst, void *p)". 
FossilOrigin-Name: 115b830509e8f0aa9d5965c1e9cd4f2ed9d01938
 2013-03-25 17:00:24 +00:00
dan
aef49d7141 Remove unnecessary code to round the size of a memory mapping to 4KB from os_unix.c. Rename SQLITE_IOERR_MREMAP to SQLITE_IOERR_MMAP. Fix other small issues in os_unix.c. 
FossilOrigin-Name: dce35c01a5fe66d2970075b1e3f0376026485e4c
 2013-03-25 16:28:54 +00:00
dan
a1afc7425a Fix a case in the pager where an xFetch() reference was being leaked following an OOM error. 
FossilOrigin-Name: 5885ba6ce768658ec25b60747430d147b315b55c
 2013-03-25 13:50:49 +00:00
dan
f23da96636 Replace the sqlite3_io_methods.xMremap interface with sqlite3_io_methods.xFetch and xUnfetch. 
FossilOrigin-Name: 1431be95579160fb70408d43e17fc23c7b69ab4a
 2013-03-23 21:00:41 +00:00
dan
c00033125d Add a fix for the assert() statements added by the previous commit. 
FossilOrigin-Name: 19345416ed5e1ab5b0b35993b0b9069c2fb1683b
 2013-03-22 17:46:11 +00:00
dan
6101d50471 Add assert statements to os_unix.c to ensure that any mapped region of the database file is not being read or written using the xRead() or xWrite() methods. 
FossilOrigin-Name: 765615f9fba7c1765eb741cb98a09a28b464ee55
 2013-03-22 08:58:38 +00:00
mistachkin
48864df97d Many spelling fixes in comments. No changes to code. 
FossilOrigin-Name: 6f6e2d50941e444ebc83604daddcc034137a05b7
 2013-03-21 21:20:32 +00:00
dan
c71b45e619 Do not use the Linux mremap() call. Use the same strategy for xMremap() as on OSX instead. 
FossilOrigin-Name: 5ed8ad780c991d2ca44003ee84350fb5e95ad58e
 2013-03-21 14:47:47 +00:00
dan
d306e1a3a1 Optimize the xMremap method in os_unix.c some. 
FossilOrigin-Name: 9529ed88a71fee02fae72dc86f0669bd6856ff92
 2013-03-20 18:25:49 +00:00
dan
eb97b29345 When possible, use memory mapping when appending new pages to a database file. 
FossilOrigin-Name: 14135da3cdbafd699563a29608f32347cda28338
 2013-03-20 14:26:59 +00:00
dan
5d8a137218 Add the sqlite3_io_methods.xMremap() method to the VFS interface. Also "PRAGMA mmap_size". 
FossilOrigin-Name: 6183f1bd86ceed76d22d9762f3d7eb33262c62d1
 2013-03-19 19:28:06 +00:00
dan
b2d3de3bf4 Use mmap() to read from the database file in rollback mode. This branch is unix only for now. 
FossilOrigin-Name: 6f21d9cbf5d457e63a7282015a89ae785526cf6d
 2013-03-14 18:34:37 +00:00
drh
cfc176973e Fix an operator precedence problem on the [1d8086902e] check-in. 
FossilOrigin-Name: 4f5f3aebe81c3cbe539db3e33ec38fa3de47e90b
 2013-03-06 01:41:53 +00:00
dan
b83c21e600 Do not attempt to set the permissions on an existing journal or wal file. Do this only immediately after creating a new file (or opening one zero bytes in size). 
FossilOrigin-Name: 1d8086902ee96347491bce5ec04dc92ccd42efa1
 2013-03-05 15:27:34 +00:00
drh
503a686e09 Always use strncmp() rather than memcmp() when comparing strings where one 
or other string might be less than the length parameter, since optimized
versions of memcmp() might read past the first difference and in so doing
generate an access violation.

FossilOrigin-Name: d73435587ba7459e2e2c32980d0e17abdeceb4bc
 2013-03-01 01:07:17 +00:00