/[pcre]/code/trunk/ChangeLog
ViewVC logotype

Diff of /code/trunk/ChangeLog

Parent Directory Parent Directory | Revision Log Revision Log | View Patch Patch

revision 1454 by ph10, Sun Feb 9 18:55:03 2014 UTC revision 1487 by ph10, Wed Jun 18 17:17:03 2014 UTC
# Line 1  Line 1 
1  ChangeLog for PCRE  ChangeLog for PCRE
2  ------------------  ------------------
3    
4  Version 8.35-RC1 xx-xxxx-201x  Version 8.36 xx-xxx-2014
5  -----------------------------  ------------------------
6    
7    1.  Got rid of some compiler warnings in the C++ modules that were shown up by
8        -Wmissing-field-initializers and -Wunused-parameter.
9    
10    2.  The tests for quantifiers being too big (greater than 65535) were being
11        applied after reading the number, and stupidly assuming that integer
12        overflow would give a negative number. The tests are now applied as the
13        numbers are read.
14    
15    3.  Tidy code in pcre_exec.c where two branches that used to be different are
16        now the same.
17    
18    4.  The JIT compiler did not generate match limit checks for certain
19        bracketed expressions with quantifiers. This may lead to exponential
20        backtracking, instead of returning with PCRE_ERROR_MATCHLIMIT. This
21        issue should be resolved now.
22    
23    5.  Fixed an issue, which occures when nested alternatives are optimized
24        with table jumps.
25    
26    6.  Inserted two casts and changed some ints to size_t in the light of some
27        reported 64-bit compiler warnings (Bugzilla 1477).
28    
29    7.  Fixed a bug concerned with zero-minimum possessive groups that could match
30        an empty string, which sometimes were behaving incorrectly in the
31        interpreter (though correctly in the JIT matcher). This pcretest input is
32        an example:
33    
34          '\A(?:[^"]++|"(?:[^"]*+|"")*+")++'
35          NON QUOTED "QUOT""ED" AFTER "NOT MATCHED
36    
37        the interpreter was reporting a match of 'NON QUOTED ' only, whereas the
38        JIT matcher and Perl both matched 'NON QUOTED "QUOT""ED" AFTER '. The test
39        for an empty string was breaking the inner loop and carrying on at a lower
40        level, when possessive repeated groups should always return to a higher
41        level as they have no backtrack points in them. The empty string test now
42        occurs at the outer level.
43    
44    8.  Fixed a bug that was incorrectly auto-possessifying \w+ in the pattern
45        ^\w+(?>\s*)(?<=\w) which caused it not to match "test test".
46    
47    9.  Give a compile-time error for \o{} (as Perl does) and for \x{} (which Perl
48        doesn't).
49    
50    10. Change 8.34/15 introduced a bug that caused the amount of memory needed
51        to hold a pattern to be incorrectly computed (too small) when there were
52        named back references to duplicated names. This could cause "internal
53        error: code overflow" or "double free or corruption" or other memory
54        handling errors.
55    
56    11. When named subpatterns had the same prefixes, back references could be
57        confused. For example, in this pattern:
58    
59          /(?P<Name>a)?(?P<Name2>b)?(?(<Name>)c|d)*l/
60    
61        the reference to 'Name' was incorrectly treated as a reference to a
62        duplicate name.
63    
64    12. A pattern such as /^s?c/mi8 where the optional character has more than
65        one "other case" was incorrectly compiled such that it would only try to
66        match starting at "c".
67    
68    13. When a pattern starting with \s was studied, VT was not included in the
69        list of possible starting characters; this should have been part of the
70        8.34/18 patch.
71    
72    14. If a character class started [\Qx]... where x is any character, the class
73        was incorrectly terminated at the ].
74    
75    
76    Version 8.35 04-April-2014
77    --------------------------
78    
79  1.  A new flag is set, when property checks are present in an XCLASS.  1.  A new flag is set, when property checks are present in an XCLASS.
80      When this flag is not set, PCRE can perform certain optimizations      When this flag is not set, PCRE can perform certain optimizations
# Line 30  Version 8.35-RC1 xx-xxxx-201x Line 102  Version 8.35-RC1 xx-xxxx-201x
102      above a certain treshold (e.g: 256). The only limitation is that the value      above a certain treshold (e.g: 256). The only limitation is that the value
103      must be bigger than the treshold as well. This function is useful, when      must be bigger than the treshold as well. This function is useful, when
104      the characters above the treshold are handled in the same way.      the characters above the treshold are handled in the same way.
105    
106  7.  The macros whose names start with RAWUCHAR are placeholders for a future  7.  The macros whose names start with RAWUCHAR are placeholders for a future
107      mode in which only the bottom 21 bits of 32-bit data items are used. To      mode in which only the bottom 21 bits of 32-bit data items are used. To
108      make this more memorable for those maintaining the code, the names have      make this more memorable for those maintaining the code, the names have
109      been changed to start with UCHAR21, and an extensive comment has been added      been changed to start with UCHAR21, and an extensive comment has been added
110      to their definition.      to their definition.
111    
112  8.  Add missing (new) files sljitNativeTILEGX.c and sljitNativeTILEGX-encoder.c  8.  Add missing (new) files sljitNativeTILEGX.c and sljitNativeTILEGX-encoder.c
113      to the export list in Makefile.am (they were accidentally omitted from the      to the export list in Makefile.am (they were accidentally omitted from the
114      8.34 tarball).      8.34 tarball).
115    
116  9.  The informational output from pcretest used the phrase "starting byte set"  9.  The informational output from pcretest used the phrase "starting byte set"
117      which is inappropriate for the 16-bit and 32-bit libraries. As the output      which is inappropriate for the 16-bit and 32-bit libraries. As the output
118      for "first char" and "need char" really means "non-UTF-char", I've changed      for "first char" and "need char" really means "non-UTF-char", I've changed
119      "byte" to "char", and slightly reworded the output. The documentation about      "byte" to "char", and slightly reworded the output. The documentation about
120      these values has also been (I hope) clarified.      these values has also been (I hope) clarified.
121    
122  10. Another JIT related optimization: use table jumps for selecting the correct  10. Another JIT related optimization: use table jumps for selecting the correct
123      backtracking path, when more than four alternatives are present inside a      backtracking path, when more than four alternatives are present inside a
# Line 54  Version 8.35-RC1 xx-xxxx-201x Line 126  Version 8.35-RC1 xx-xxxx-201x
126  11. Empty match is not possible, when the minimum length is greater than zero,  11. Empty match is not possible, when the minimum length is greater than zero,
127      and there is no \K in the pattern. JIT should avoid empty match checks in      and there is no \K in the pattern. JIT should avoid empty match checks in
128      such cases.      such cases.
129    
130  12. In a caseless character class with UCP support, when a character with more  12. In a caseless character class with UCP support, when a character with more
131      than one alternative case was not the first character of a range, not all      than one alternative case was not the first character of a range, not all
132      the alternative cases were added to the class. For example, s and \x{17f}      the alternative cases were added to the class. For example, s and \x{17f}
133      are both alternative cases for S: the class [RST] was handled correctly,      are both alternative cases for S: the class [RST] was handled correctly,
134      but [R-T] was not.      but [R-T] was not.
135    
136  13. The configure.ac file always checked for pthread support when JIT was  13. The configure.ac file always checked for pthread support when JIT was
137      enabled. This is not used in Windows, so I have put this test inside a      enabled. This is not used in Windows, so I have put this test inside a
138      check for the presence of windows.h (which was already tested for).      check for the presence of windows.h (which was already tested for).
139    
140  14. Improve pattern prefix search by a simplified Boyer-Moore algorithm in JIT.  14. Improve pattern prefix search by a simplified Boyer-Moore algorithm in JIT.
141      The algorithm provides a way to skip certain starting offsets, and usually      The algorithm provides a way to skip certain starting offsets, and usually
142      faster than linear prefix searches.      faster than linear prefix searches.
143    
144  15. Change 13 for 8.20 updated RunTest to check for the 'fr' locale as well  15. Change 13 for 8.20 updated RunTest to check for the 'fr' locale as well
145      as for 'fr_FR' and 'french'. For some reason, however, it then used the      as for 'fr_FR' and 'french'. For some reason, however, it then used the
146      Windows-specific input and output files, which have 'french' screwed in.      Windows-specific input and output files, which have 'french' screwed in.
147      So this could never have worked. One of the problems with locales is that      So this could never have worked. One of the problems with locales is that
148      they aren't always the same. I have now updated RunTest so that it checks      they aren't always the same. I have now updated RunTest so that it checks
149      the output of the locale test (test 3) against three different output      the output of the locale test (test 3) against three different output
150      files, and it allows the test to pass if any one of them matches. With luck      files, and it allows the test to pass if any one of them matches. With luck
151      this should make the test pass on some versions of Solaris where it was      this should make the test pass on some versions of Solaris where it was
152      failing. Because of the uncertainty, the script did not used to stop if      failing. Because of the uncertainty, the script did not used to stop if
153      test 3 failed; it now does. If further versions of a French locale ever      test 3 failed; it now does. If further versions of a French locale ever
154      come to light, they can now easily be added.      come to light, they can now easily be added.
155    
156  16. If --with-pcregrep-bufsize was given a non-integer value such as "50K",  16. If --with-pcregrep-bufsize was given a non-integer value such as "50K",
157      there was a message during ./configure, but it did not stop. This now      there was a message during ./configure, but it did not stop. This now
158      provokes an error. The invalid example in README has been corrected.      provokes an error. The invalid example in README has been corrected.
159      If a value less than the minimum is given, the minimum value has always      If a value less than the minimum is given, the minimum value has always
160      been used, but now a warning is given.      been used, but now a warning is given.
161    
162  17. If --enable-bsr-anycrlf was set, the special 16/32-bit test failed. This  17. If --enable-bsr-anycrlf was set, the special 16/32-bit test failed. This
163      was a bug in the test system, which is now fixed. Also, the list of various      was a bug in the test system, which is now fixed. Also, the list of various
164      configurations that are tested for each release did not have one with both      configurations that are tested for each release did not have one with both
165      16/32 bits and --enable-bar-anycrlf. It now does.      16/32 bits and --enable-bar-anycrlf. It now does.
166    
167  18. pcretest was missing "-C bsr" for displaying the \R default setting.  18. pcretest was missing "-C bsr" for displaying the \R default setting.
168    
169  19. Little endian PowerPC systems are supported now by the JIT compiler.  19. Little endian PowerPC systems are supported now by the JIT compiler.
170    
171  20. The fast forward newline mechanism could enter to an infinite loop on  20. The fast forward newline mechanism could enter to an infinite loop on
172      certain invalid UTF-8 input. Although we don't support these cases      certain invalid UTF-8 input. Although we don't support these cases
173      this issue can be fixed by a performance optimization.      this issue can be fixed by a performance optimization.
174    
175  21. Change 33 of 8.34 is not sufficient to ensure stack safety because it does  21. Change 33 of 8.34 is not sufficient to ensure stack safety because it does
176      not take account if existing stack usage. There is now a new global      not take account if existing stack usage. There is now a new global
177      variable called pcre_stack_guard that can be set to point to an external      variable called pcre_stack_guard that can be set to point to an external
178      function to check stack availability. It is called at the start of      function to check stack availability. It is called at the start of
179      processing every parenthesized group.      processing every parenthesized group.
180    
181    22. A typo in the code meant that in ungreedy mode the max/min qualifier
182        behaved like a min-possessive qualifier, and, for example, /a{1,3}b/U did
183        not match "ab".
184    
185    23. When UTF was disabled, the JIT program reported some incorrect compile
186        errors. These messages are silenced now.
187    
188    24. Experimental support for ARM-64 and MIPS-64 has been added to the JIT
189        compiler.
190    
191    25. Change all the temporary files used in RunGrepTest to be different to those
192        used by RunTest so that the tests can be run simultaneously, for example by
193        "make -j check".
194    
195    
196  Version 8.34 15-December-2013  Version 8.34 15-December-2013

Legend:
Removed from v.1454  
changed lines
  Added in v.1487

  ViewVC Help
Powered by ViewVC 1.1.5