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eaac9996edf679fd9b081508e23f98e70f5cdcd9
Commit Graph

201 Commits

Author SHA1 Message Date
drh
255a81f10a Modify sqlite3_str_finish() and sqlite3VMPrintf() so that they always 
return NULL on any OOM or SQLITE_LIMIT_LENGTH error.

FossilOrigin-Name: e7144ffd21294d7aebbfa6aa5a262797a6d16de11193f1bf6b75f5f27b04c940
 2019-02-22 15:42:10 +00:00
drh
7ba03ea15a Slight adjustment to the printf formatter large memory allocation detector 
so that it does not overestimate the amount of space needed for
oversize %d conversions.

FossilOrigin-Name: 1aee70d6de8a9b17ebb74a7cb1dad65139cde1b615dcce4d15d3a476fda8676b
 2019-02-01 21:08:27 +00:00
drh
2964225247 Prevent the printf formatter from doing large memory allocations - larger 
than either the size of the static buffer for interfaces like
sqlite3_snprintf(), or larger than SQLITE_LIMIT_LENGTH for interfaces that
are associated with a database connection.  This helps to prevent DOS
attacks on products that let hostile sources inject arbitrary SQL.  It also
helps fuzzers run faster and more effectively.

FossilOrigin-Name: 179e5d46054e5c86f53a79b7a0823d9a383da8391ad1d3c3b22645927a1e052b
 2019-02-01 20:29:04 +00:00
drh
9a6d01bff5 Performance improvement in the parsing of options to %-formats in the 
printf implementation.

FossilOrigin-Name: 40d8f8ae87abf928542c4e558a4c3a3eab18776a3e8db7ca1c5e5f744ca0bce3
 2019-02-01 18:46:41 +00:00
drh
af524a6343 Make sure the %z optimization for printf() is not invoked if there has been 
a prior error (SQLITE_NOMEM or SQLITE_TOOBIG) associated with the same
printf() call.

FossilOrigin-Name: a2304a3474b0ca35eee0af64286ce2f7cb24d181323e128d5f04f7fe6e1c0980
 2018-09-13 17:07:12 +00:00
drh
3e62ddbf13 Fix a harmless compiler warning. 
FossilOrigin-Name: 8d02c7a6a09f7520ad180b0d943db475894cd39b0ccdb2ad2c44009d5f25c8a6
 2018-05-30 00:59:09 +00:00
drh
f80bba9d8d Enhance the sqlite3_str_new() interface so that it always returns a valid 
and non-NULL pointer even in an OOM condition.

FossilOrigin-Name: ed5b09680fd6659ebbe5ace3c1c56f3962bbd75cfdf65c7565651900cf87917a
 2018-05-16 15:35:03 +00:00
drh
446135d724 Fix minor problems with the sqlite3_str interface. 
FossilOrigin-Name: 43ea8a6836ccb9910314d35e07d881694200c97ef5969629f62e49f7a2a42f92
 2018-05-09 14:29:40 +00:00
drh
0cdbe1aee0 Make the internal dynamic string interface available to extensions using 
the new sqlite3_str object and its associated methods.  This is mostly just
a renaming of internal objects and methods to use external names, through
there are a few small wrapper functions.

FossilOrigin-Name: 87f261f0cb800b06ad786f6df16f2c4dddd0d93dfdcc77b4a4eaa22920b56bf1
 2018-05-09 13:46:26 +00:00
drh
cc398969e0 Optimize calls to sqlite3_mprintf("%z...") so that they attempt to append 
text onto the end of the existing memory allocation rather than reallocating
and copying.

FossilOrigin-Name: 4bc8a48e644562f6e6192f4c6fc4a70f6bb59f8126ed6c6dc876bedf65d74cda
 2018-02-20 15:23:37 +00:00
drh
a15a7c352c Printing a value of 0 using %c terminates the string. 
FossilOrigin-Name: 255612f0a131f2f522cbca3cc5a1edcf7e38938abca25ba421e7e38a422db9c9
 2018-02-19 21:58:16 +00:00
drh
cf7c8370d1 Test cases and a bug fix on the new unicode handling in %c. 
FossilOrigin-Name: e41d64e95b9b6fec5dc329553822925e7d648a41912b420cfa1ba198736e6bab
 2018-02-19 20:23:20 +00:00
drh
136102beda Fix the %c substitution in printf() so that it works with unicode characters. 
FossilOrigin-Name: c35be1d9e9132fbadc74d207c1088e5a710a151c0835c38a63bf3c8e6fd711a0
 2018-02-19 18:56:52 +00:00
drh
57e3ba7623 Make the alternate-form-2 flag ("!") change the meaning of width and precision 
from bytes to characters for the %q, %Q, and %w extensions of printf().

FossilOrigin-Name: 391540acbea34eb88c75b1152b458d8936b3fdfff47633b9ec897775b015ba4c
 2018-02-19 18:03:10 +00:00
drh
62856465f2 In the printf() library, measure width and precision in characters rather 
than bytes if the "!" (alternate-form-2) flag is present on a %s or %z
substitution.

FossilOrigin-Name: ca31c6630422fca70e626dd38aae96296bd8535d491ca52391624a5e7e663636
 2018-02-19 17:03:23 +00:00
mistachkin
4a9ff91852 Make it possible to use OSTRACE for multi-process testing. 
FossilOrigin-Name: 0a7d416c4c43632725dc89cda8667cd9726b5152ee4692e4d0c9e2031e60cfb4
 2017-11-09 17:29:04 +00:00
drh
c84ddf14c5 Space and size optimization to the printf implementation. 
FossilOrigin-Name: d01d2cffefd1cdb52b386e4983599534c0fbbe6aebda186db53200e4b2283f0a
 2017-08-19 20:38:18 +00:00
drh
3f18e6d7a9 Remove the zBase field from the StrAccum object. Resulting code is slightly 
smaller and faster.

FossilOrigin-Name: 6e52fa5fd79988a433bae0152ceae036edab4bb18d2b48ed04c1f53f141728b0
 2017-08-12 02:01:55 +00:00
drh
5f42995a0a Avoid the possibility of signed integer overflow with oversized precisions 
in %d conversions in the printf() implementation.

FossilOrigin-Name: ef3a7c877a7549b351aafd983cfa96c863eb2641b6218bdd5cb563f659f879d8
 2017-03-20 16:34:18 +00:00
drh
2c338a9d9a Add the "," flag to printf(). 
FossilOrigin-Name: 064445b12f99f76e9a12957be97edd520ab3ae27
 2017-02-10 19:38:36 +00:00
drh
8236f688e8 Changes to the printf implementation for better performance. 
FossilOrigin-Name: acdb8f6f10953ed4290aadc9e026edd57d1dd21a
 2017-01-04 00:26:28 +00:00
dan
895decf6b5 Avoid passing NULL pointers to memcmp() or memcpy(), even when the 
"number-of-bytes" argument is passed 0.

FossilOrigin-Name: 56ff72ab44288296efc99a608f7edc4346366a50
 2016-12-30 14:15:56 +00:00
drh
e9bb566096 Performance enhancement to sqlite3_snprintf(). 
FossilOrigin-Name: c53dca7fadd81ea340fef776373cbb122c9ccd46
 2016-11-25 15:47:53 +00:00
drh
043e586e29 Performance improvement in sqlite3StrAccumFinish() for the common case where 
no memory allocation is required.

FossilOrigin-Name: b6acf5d4ef016326a079463e70e71c2fc95a352d
 2016-11-25 15:11:26 +00:00
drh
ad5a9d715f Renumber internal constants in the printf() implemention for a small 
performance improvement.

FossilOrigin-Name: 69d11447f4b1a8c536c3b6573d2a3419da870412
 2016-05-05 11:53:12 +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
5f4a686f8c Simplification and size reduction to the printf logic. Remove the bFlags 
parameter from sqlite3VXPrintf() and sqlite3XPrintf().  Use sqlite3XPrintf()
instead of sqlite3_snprintf() for rendering P4 values in EXPLAIN output.

FossilOrigin-Name: 0bdb41c45aa1cc8e5c136aaa6605d54b401483bd
 2016-01-30 12:50:25 +00:00
drh
fa385edff3 A new approach to very large sqlite3_mprintf() strings: Back out the 
[d655a665] check-in and instead make the size fields in StrAccum unsigned.
Strings generated by sqlite3_mprintf() can now be as large as 2^31-1 bytes.

FossilOrigin-Name: 7adb789f45698e5569b840d23f3f9488db3ed109
 2016-01-04 12:07:27 +00:00
drh
6044bf8bf3 Limit the length of sqlite3_mprintf() output to 2^30 bytes, even if 
SQLITE_MAX_LENGTH is set larger at compile-time.

FossilOrigin-Name: d655a665acfae676d30e90e3731f483bee6acc63
 2016-01-04 04:28:11 +00:00
drh
ea06a271a4 Avoid doing comparisons with pointers that might have been previously been 
passed to realloc() and/or free().

FossilOrigin-Name: f20396adb2cff12a17a3fc90b36241ae3fdfd62a
 2015-12-08 16:08:10 +00:00
drh
d797a9b5cb Changes to avoid obscure, theoretical undefined behavior. This is preventative 
measures only - no actual problems observed on tested compilers.

FossilOrigin-Name: a9e819082ba19e72db03bba37edfb7702ff489a5
 2015-12-07 16:43:44 +00:00
drh
c386ef4f2c Add the SQLITE_PRINTF_PRECISION_LIMIT compile-time option. 
FossilOrigin-Name: ecad75d69e0d5c83dd3584d363e557e84b65f7f2
 2015-11-30 22:52:14 +00:00
drh
96ceaf8680 Code simplification in sqlite3ColumnsFromExprList(). Update the %z format 
code so that it works with buffers obtained from sqlite3DbMalloc().  Add a
testcase for the slow column name uniquifier.

FossilOrigin-Name: 9272426057b6cb2d913519ff4c97aa6e211f7d51
 2015-11-14 22:04:22 +00:00
drh
2a8f671244 Optimizations to the printf formatter. 
FossilOrigin-Name: a3b35ddeca8f459e81105ab6477f3c5afb9b96d5
 2015-09-02 21:00:48 +00:00
drh
d37bea5bdc Use sqlite3XPrintf() instead of sqlite3StrAccumAppend() in a few places 
for better performance and a smaller footprint.

FossilOrigin-Name: 82355e41084387fa11b7b531e4d660dd3b4cd984
 2015-09-02 15:37:50 +00:00
drh
a8dbd52abb Amplify the comment on renderLogMsg() that explains the problems associated 
with calling sqlite3_log() from deep within the memory allocator.

FossilOrigin-Name: a73d7128fbca8dde5e90bd46ee915e39ae07dd1f
 2015-07-14 22:43:37 +00:00
mistachkin
f5b5f9b972 Fix typo in comment. No changes to code. 
FossilOrigin-Name: e49c291735e613e384f6da044ef865dd274cabc8
 2015-06-08 17:42:57 +00:00
drh
38b4149ca1 Factor out the TreeView parse tree printing module into a separate file. 
FossilOrigin-Name: c32ce54ca46a4be4373983be6fd44b1f3a0250d1
 2015-06-08 15:08:15 +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
0c6ab89b41 Remove four lines of superfluous code identified by clang scan-build. 
FossilOrigin-Name: 04afa3febee32854fbb09ef8d4ffffd432119716
 2015-05-05 18:52:54 +00:00
drh
c049057242 Cleanup of the sqlite3StrAccumInit() function. No functionality changes. 
FossilOrigin-Name: 7952c32268aa650d9ee946d5bfe190f712e3bbe6
 2015-05-02 11:45:53 +00:00
drh
f3cdcdccbe Use sqlite3_malloc64() in place of sqlite3_malloc() internally. 
FossilOrigin-Name: 48f553b05c05373c0af4b9c3a542979db3a2ee19
 2015-04-29 16:50:28 +00:00
mistachkin
02b0e267fb Make sure the sqlite3DebugPrintf() function is defined for OSTRACE as well. 
FossilOrigin-Name: ae5af70427e0df960a54c48cd27a6288500b1f31
 2015-04-16 03:37:19 +00:00
drh
3457338ced Fix a faulty assert() in the sqlite3StrAccumAppend() routine. 
FossilOrigin-Name: 998cfdb8dcda2cac94b83326751e16dcef8b267f
 2015-04-15 05:38:35 +00:00
drh
b6f47deb0c Avoid signed integer overflow when converting oversized in-line integer 
widths and precisions in printf().

FossilOrigin-Name: 8e4ac2ce24415926247961b00a62425ae85d6ffb
 2015-04-07 15:39:29 +00:00
dan
8c069147ce Another change to avoid a problem caused by integer overflow in the printf() code. 
FossilOrigin-Name: 95625ef3adc3c408d67e70f877f390445fbb8292
 2015-04-07 14:38:57 +00:00
drh
a30d22a7a6 Further changes to guard against integer overflow in the width and precision 
of printf() arguments.

FossilOrigin-Name: 5ce4e7d7651e5c72a59f03f7aeb366291e62ab57
 2015-04-07 13:28:41 +00:00
drh
74b42275ec Guard against excessive width and precision in floating-point conversions 
in the printf routines.

FossilOrigin-Name: c494171f77dc2e5e04cb6d865e688448f04e5920
 2015-04-07 12:41:17 +00:00
drh
96c707a3c2 Improvements to SQLITE_ENABLE_API_ARMOR. 
FossilOrigin-Name: 823ad40ccb5b51aaa0d5a48da63b465df9d0649a
 2015-02-13 16:36:14 +00:00
drh
1466e84187 The va_list argument cannot take on a NULL value and cannot be compared with 
NULL on some platforms (ex: ARM).  So do not attempt to do so.

FossilOrigin-Name: 1964e656b4b420e8d6a4ba12d270ed02db292b88
 2015-01-25 20:19:53 +00:00