[#79914] [Ruby trunk Bug#13282] opt_str_freeze does not always dedupe — normalperson@...
Issue #13282 has been reported by Eric Wong.
4 messages
2017/03/05
[#80140] [Ruby trunk Feature#13295] [PATCH] compile.c: apply opt_str_freeze to String#-@ (uminus) — shyouhei@...
Issue #13295 has been updated by shyouhei (Shyouhei Urabe).
5 messages
2017/03/13
[#80362] Re: [Ruby trunk Feature#13295] [PATCH] compile.c: apply opt_str_freeze to String#-@ (uminus)
— Eric Wong <normalperson@...>
2017/03/26
shyouhei@ruby-lang.org wrote:
[#80368] Re: [Ruby trunk Feature#13295] [PATCH] compile.c: apply opt_str_freeze to String#-@ (uminus)
— SASADA Koichi <ko1@...>
2017/03/27
On 2017/03/26 15:16, Eric Wong wrote:
[#80205] Re: [ruby-cvs:65166] duerst:r58000 (trunk): clarifiy 'codepoint' in documentation of String#each_codepoint — Eric Wong <normalperson@...>
duerst@ruby-lang.org wrote:
4 messages
2017/03/17
[#80213] Re: [ruby-cvs:65166] duerst:r58000 (trunk): clarifiy 'codepoint' in documentation of String#each_codepoint
— Martin J. Dürst <duerst@...>
2017/03/17
Hello Eric,
[#80290] [Ruby trunk Feature#13355] [PATCH] compile.c: optimize literal String range in case/when dispatch — normalperson@...
Issue #13355 has been reported by normalperson (Eric Wong).
4 messages
2017/03/23
[#80410] Re: [Ruby trunk Feature#13355] [PATCH] compile.c: optimize literal String range in case/when dispatch
— Eric Wong <normalperson@...>
2017/03/27
normalperson@yhbt.net wrote:
[#80415] [Ruby trunk Feature#12589] VM performance improvement proposal — vmakarov@...
Issue #12589 has been updated by vmakarov (Vladimir Makarov).
5 messages
2017/03/28
[#80488] [Ruby trunk Feature#12589] VM performance improvement proposal — vmakarov@...
Issue #12589 has been updated by vmakarov (Vladimir Makarov).
4 messages
2017/03/29
[ruby-core:80398] [Ruby trunk Bug#13075] String#unpack with block / String#unpack1 exposes uninitialized memory
From:
nagachika00@...
Date:
2017-03-27 16:13:27 UTC
List:
ruby-core #80398
Issue #13075 has been updated by nagachika (Tomoyuki Chikanaga).
Backport changed from 2.1: REQUIRED, 2.2: DONE, 2.3: REQUIRED, 2.4: DONE to 2.1: REQUIRED, 2.2: DONE, 2.3: DONE, 2.4: DONE
ruby_2_3 r58171 merged revision(s) 57187,57234.
----------------------------------------
Bug #13075: String#unpack with block / String#unpack1 exposes uninitialized memory
https://bugs.ruby-lang.org/issues/13075#change-63887
* Author: rhenium (Kazuki Yamaguchi)
* Status: Closed
* Priority: Normal
* Assignee:
* Target version:
* ruby -v:
* Backport: 2.1: REQUIRED, 2.2: DONE, 2.3: DONE, 2.4: DONE
----------------------------------------
A problematic code looks like (in pack.c, pack_unpack_internal()):
~~~c
case 'b':
{
VALUE bitstr;
char *t;
int bits;
long i;
if (p[-1] == '*' || len > (send - s) * 8)
len = (send - s) * 8;
bits = 0;
UNPACK_PUSH(bitstr = rb_usascii_str_new(0, len));
t = RSTRING_PTR(bitstr);
for (i=0; i<len; i++) {
if (i & 7) bits >>= 1;
else bits = (unsigned char)*s++;
*t++ = (bits & 1) ? '1' : '0';
}
}
break;
~~~
UNPACK_PUSH() immediately yields the value (String#unpack with block) or returns to the caller (String#unpack1), but the content bytes are not initialized at the time.
This bug dates back to r11175 (Ruby 1.9.0).
--
https://bugs.ruby-lang.org/
Unsubscribe: <mailto:ruby-core-request@ruby-lang.org?subject=unsubscribe>
<http://lists.ruby-lang.org/cgi-bin/mailman/options/ruby-core>