After the encoding index instance variable is removed when all
instance variables are removed in `obj_free`, then `rb_str_free`
causes uninitialized instance variable warning and nil-to-integer
conversion exception. Both cases result in object allocation
during GC, and crashes.
Instead of searching twice to extract and to delete, extract and
delete the found position at the first search.
This makes faster nearly twice, for regexps and strings.
| |compare-ruby|built-ruby|
|:-------------|-----------:|---------:|
|regexp-short | 2.143M| 3.918M|
|regexp-long | 105.162k| 205.410k|
|string-short | 3.789M| 7.964M|
|string-long | 1.301M| 2.457M|
Move existing example to the corresponding paragraph and
add an example for `string =~ regexp` vs. `regexp =~ string`;
avoid using the receiver's identifier from the call-seq
because it does not appear in rendered HTML docs;
mention deprecation of Object#=~; fix some markup and typos.
Saves comitters' daily life by avoid #include-ing everything from
internal.h to make each file do so instead. This would significantly
speed up incremental builds.
We take the following inclusion order in this changeset:
1. "ruby/config.h", where _GNU_SOURCE is defined (must be the very
first thing among everything).
2. RUBY_EXTCONF_H if any.
3. Standard C headers, sorted alphabetically.
4. Other system headers, maybe guarded by #ifdef
5. Everything else, sorted alphabetically.
Exceptions are those win32-related headers, which tend not be self-
containing (headers have inclusion order dependencies).
This removes the related tests, and puts the related specs behind
version guards. This affects all code in lib, including some
libraries that may want to support older versions of Ruby.
Looking at the list of symbols inside of libruby-static.a, I found
hundreds of functions that are defined, but used from nowhere.
There can be reasons for each of them (e.g. some functions are
specific to some platform, some are useful when debugging, etc).
However it seems the functions deleted here exist for no reason.
This changeset reduces the size of ruby binary from 26,671,456
bytes to 26,592,864 bytes on my machine.
This changeset basically replaces `ruby_xmalloc(x * y)` into
`ruby_xmalloc2(x, y)`. Some convenient functions are also
provided for instance `rb_xmalloc_mul_add(x, y, z)` which allocates
x * y + z byes.
Since the introduction of STR_SHARED_ROOT, the word "shared"
has become very overloaded with respect to String's internal
states. Use a different name for STR_IS_SHARED_M and explain
its purpose.
The buffer deduplication codepath in rb_fstring can be used to free the buffer
of shared string roots, which leads to use-after-free.
Introudce a new flag to tag strings that at one point have been a shared root.
Check for it in rb_fstring to avoid freeing buffers that are shared by
multiple strings. This change is based on nobu's idea in [ruby-core:94838].
The included test case test for the sequence of calls to internal functions
that lead to this bug. See attached ticket for Ruby level repros.
[Bug #16151]
* string.c (rb_str_sub_bang): retrieves a pointer to the
replacement string buffer just before using it, for the case of
replacement with the receiver string itself. [Bug #16105]
This change:
* Added an explanation about back references except \n and \k<n>
(\` \& \' \+ \0)
* Added an explanation about an escape (\\)
* Added some rdoc references
* Rephrased and clarified the reason why double escape is needed, added
some examples, and moved the note to the last (because it is not
specific to the method itself).
rb_fstring behavior in this case is to freeze the receiver. I'm
not sure if that should be changed, so this takes the conservative
approach of duping the receiver in String#-@ before passing
to rb_fstring.
Fixes [Bug #15926]
* string.c (get_reg_grapheme_cluster): make regexp from properly
encoded sources fro wide-char encodings. [Bug #15965]
* regparse.c (node_extended_grapheme_cluster): suppress false
duplicated range warning for the time being.
When a string is #frozen, it's capacity is resized to fit (if it is much
larger), since we know it will no longer be mutated.
> puts ObjectSpace.dump(String.new("a"*30, capacity: 1000))
{"type":"STRING", "class":"0x7feaf00b7bf0", "bytesize":30, "capacity":1000, "value":"...
> puts ObjectSpace.dump(String.new("a"*30, capacity: 1000).freeze)
{"type":"STRING", "class":"0x7feaf00b7bf0", "frozen":true, "bytesize":30, "value":"...
(ObjectSpace.dump doesn't show capacity if capacity is equal to bytesize)
Previously, if we dedup into an fstring, using String#-@, capacity would
not be reduced.
> puts ObjectSpace.dump(-String.new("a"*30, capacity: 1000))
{"type":"STRING", "class":"0x7feaf00b7bf0", "frozen":true, "fstring":true, "bytesize":30, "capacity":1000, "value":"...
This commit makes rb_fstring call rb_str_resize, the same as
rb_str_freeze does.
Closes: https://github.com/ruby/ruby/pull/2256
Nobuyoshi Nakada
Jean Boussier
Jeremy Evans
Marcus Stollsteimer
卜部昌平
NARUSE, Yui
zverok
Lourens Naudé
Benoit Daloze
Alan Wu
git
Aaron Patterson
Yusuke Endoh
Takashi Kokubun
John Hawthorn