Revision: 795
http://www.exim.org/viewvc/pcre2?view=rev&revision=795
Author: ph10
Date: 2017-05-20 17:25:29 +0100 (Sat, 20 May 2017)
Log Message:
-----------
Documentation update.
Modified Paths:
--------------
code/trunk/maint/README
Modified: code/trunk/maint/README
===================================================================
--- code/trunk/maint/README 2017-05-20 15:34:50 UTC (rev 794)
+++ code/trunk/maint/README 2017-05-20 16:25:29 UTC (rev 795)
@@ -114,7 +114,14 @@
. Run tests in both 32-bit and 64-bit environments if possible.
-. Run tests with two different compilers if possible (e.g. clang and gcc).
+. Run tests with two or more different compilers (e.g. clang and gcc), and
+ make use of -fsanitize=address and friends where possible. For gcc,
+ -fsanitize=undefined -std=gnu99 picks up undefined behaviour at runtime, but
+ needs -fno-sanitize=shift to get rid of warnings for shifts of negative
+ numbers in the JIT compiler. For clang, -fsanitize=address,undefined,integer
+ can be used but -fno-sanitize=alignment,shift,unsigned-integer-overflow must
+ be added when compiling with JIT. Another useful clang option is
+ -fsanitize=signed-integer-overflow
. Do a test build using CMake.
@@ -248,14 +255,10 @@
leaves $2 set. In Perl, it's unset. Changing this in PCRE2 will be very hard
because I think it needs much more state to be remembered.
-. Perl 6 will be a revolution. Is it a revolution too far for PCRE?
-
. An option to use NUL as a line terminator in subject strings. This could be
done relatively easily. If it is done, a suitable option for pcre2grep is
also required.
-. Catch SIGSEGV for stack overflows?
-
. A feature to suspend a match via a callout was once requested.
. An option to convert results into character offsets and character lengths.
@@ -345,13 +348,15 @@
. A limit on substitutions: a user suggested somehow finding a way of making
match_limit apply to the whole operation instead of each match separately.
-. The (relatively new) initial pre-pass in pcre2_compile() that identifies all
- captures could be upgraded to do more parsing, saving the results in a new
- vector (on-stack if the pattern is small enough). All comment removal and
- escape processing could be done at this stage (so only done once). The code
- for the other two passes would then be simpler.
+. There was a suggestion that Perl should lock out \K in lookarounds. If it
+ does, PCRE2 should follow.
+. Redesign handling of class/nclass/xclass because the compile code logic is
+ currently very contorted and obscure.
+
+. Some #defines could be replaced with enums to improve robustness.
+
Philip Hazel
Email local part: ph10
Email domain: cam.ac.uk
-Last updated: 15 December 2015
+Last updated: 20 May 2017
