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* [Bug preprocessor/45386] New: [4.6 Regression] valgrind reports out-of-bounds read in search_line_sse2
@ 2010-08-23 18:01 zsojka at seznam dot cz
2010-08-23 20:05 ` [Bug preprocessor/45386] " rguenth at gcc dot gnu dot org
2010-09-02 11:19 ` rguenth at gcc dot gnu dot org
0 siblings, 2 replies; 6+ messages in thread
From: zsojka at seznam dot cz @ 2010-08-23 18:01 UTC (permalink / raw)
To: gcc-bugs
---- testcase.c ----
int i;
--------------------
Actually, it seems any C file will suffice to reproduce.
Valgrind output:
$ valgrind -q --trace-children=yes gcc testcase.c -c
==10251== Invalid read of size 8
==10251== at 0xFEE4F3: search_line_sse2 (lex.c:372)
==10251== by 0xFEE6E9: _cpp_clean_line (lex.c:649)
==10251== by 0xFEF0E7: _cpp_get_fresh_line (lex.c:1862)
==10251== by 0xFF0871: _cpp_lex_direct (lex.c:1927)
==10251== by 0xFF1666: _cpp_lex_token (lex.c:1801)
==10251== by 0xFF3DA7: cpp_get_token (macro.c:1240)
==10251== by 0xFF405F: cpp_get_token_with_location (macro.c:1352)
==10251== by 0x54977C: c_lex_with_flags (c-lex.c:302)
==10251== by 0x502FE7: c_lex_one_token (c-parser.c:204)
==10251== by 0x513367: c_parse_file (c-parser.c:320)
==10251== by 0x54EE0A: c_common_parse_file (c-opts.c:1206)
==10251== by 0x8AB1D8: toplev_main (toplev.c:971)
==10251== Address 0x710b9c8 is 0 bytes after a block of size 8 alloc'd
==10251== at 0x4C261DF: realloc (in
/usr/lib64/valgrind/vgpreload_memcheck-amd64-linux.so)
==10251== by 0x1017B6C: xrealloc (xmalloc.c:179)
==10251== by 0xFE32BF: _cpp_convert_input (charset.c:1734)
==10251== by 0xFEBC52: read_file (files.c:648)
==10251== by 0xFEC67A: _cpp_stack_file (files.c:723)
==10251== by 0xFEDF60: cpp_read_main_file (init.c:570)
==10251== by 0x54E4BA: c_common_post_options (c-opts.c:1124)
==10251== by 0x8AA6D4: toplev_main (toplev.c:1743)
==10251== by 0x6589BBC: (below main) (in /lib64/libc-2.11.2.so)
==10251==
Tested revisions:
r163468 - fail
r162940 - OK
r161659 - OK
--
Summary: [4.6 Regression] valgrind reports out-of-bounds read in
search_line_sse2
Product: gcc
Version: 4.6.0
Status: UNCONFIRMED
Severity: minor
Priority: P3
Component: preprocessor
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: zsojka at seznam dot cz
GCC host triplet: x86_64-pc-linux-gnu
GCC target triplet: x86_64-pc-linux-gnu
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45386
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug preprocessor/45386] [4.6 Regression] valgrind reports out-of-bounds read in search_line_sse2
2010-08-23 18:01 [Bug preprocessor/45386] New: [4.6 Regression] valgrind reports out-of-bounds read in search_line_sse2 zsojka at seznam dot cz
@ 2010-08-23 20:05 ` rguenth at gcc dot gnu dot org
2010-09-02 11:19 ` rguenth at gcc dot gnu dot org
1 sibling, 0 replies; 6+ messages in thread
From: rguenth at gcc dot gnu dot org @ 2010-08-23 20:05 UTC (permalink / raw)
To: gcc-bugs
------- Comment #1 from rguenth at gcc dot gnu dot org 2010-08-23 20:05 -------
I think that's by design (it won't cross page boundary though).
--
rguenth at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |rth at gcc dot gnu dot org
Target Milestone|--- |4.6.0
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45386
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug preprocessor/45386] [4.6 Regression] valgrind reports out-of-bounds read in search_line_sse2
2010-08-23 18:01 [Bug preprocessor/45386] New: [4.6 Regression] valgrind reports out-of-bounds read in search_line_sse2 zsojka at seznam dot cz
2010-08-23 20:05 ` [Bug preprocessor/45386] " rguenth at gcc dot gnu dot org
@ 2010-09-02 11:19 ` rguenth at gcc dot gnu dot org
1 sibling, 0 replies; 6+ messages in thread
From: rguenth at gcc dot gnu dot org @ 2010-09-02 11:19 UTC (permalink / raw)
To: gcc-bugs
--
rguenth at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |WAITING
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45386
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug preprocessor/45386] [4.6 Regression] valgrind reports out-of-bounds read in search_line_sse2
[not found] <bug-45386-4@http.gcc.gnu.org/bugzilla/>
2010-09-29 16:17 ` tromey at gcc dot gnu.org
2015-08-20 15:56 ` pinskia at gcc dot gnu.org
@ 2015-08-20 16:27 ` manu at gcc dot gnu.org
2 siblings, 0 replies; 6+ messages in thread
From: manu at gcc dot gnu.org @ 2015-08-20 16:27 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=45386
Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |manu at gcc dot gnu.org
--- Comment #4 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
It should be possible to create a suppression file to silence false positives:
http://valgrind.org/docs/manual/manual-core.html#manual-core.suppress
but a comment in the code search_line_sse2 (lex.c:372) is probably as good to
avoid further duplicates.
>From gcc-bugs-return-495301-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Aug 20 17:02:49 2015
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From: "ville.voutilainen at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/63176] std::generate_canonical<float, std::numeric_limits<float>::digits>() generates 1.0f
Date: Thu, 20 Aug 2015 17:02:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?idc176
Ville Voutilainen <ville.voutilainen at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2015-08-20
CC| |redi at gcc dot gnu.org,
| |ville.voutilainen at gmail dot com
Ever confirmed|0 |1
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug preprocessor/45386] [4.6 Regression] valgrind reports out-of-bounds read in search_line_sse2
[not found] <bug-45386-4@http.gcc.gnu.org/bugzilla/>
2010-09-29 16:17 ` tromey at gcc dot gnu.org
@ 2015-08-20 15:56 ` pinskia at gcc dot gnu.org
2015-08-20 16:27 ` manu at gcc dot gnu.org
2 siblings, 0 replies; 6+ messages in thread
From: pinskia at gcc dot gnu.org @ 2015-08-20 15:56 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=45386
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |redi at gcc dot gnu.org
--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
*** Bug 67292 has been marked as a duplicate of this bug. ***
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug preprocessor/45386] [4.6 Regression] valgrind reports out-of-bounds read in search_line_sse2
[not found] <bug-45386-4@http.gcc.gnu.org/bugzilla/>
@ 2010-09-29 16:17 ` tromey at gcc dot gnu.org
2015-08-20 15:56 ` pinskia at gcc dot gnu.org
2015-08-20 16:27 ` manu at gcc dot gnu.org
2 siblings, 0 replies; 6+ messages in thread
From: tromey at gcc dot gnu.org @ 2010-09-29 16:17 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45386
Tom Tromey <tromey at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |RESOLVED
CC| |tromey at gcc dot gnu.org
Resolution| |INVALID
--- Comment #2 from Tom Tromey <tromey at gcc dot gnu.org> 2010-09-29 14:36:56 UTC ---
I agree, that is what is happening here.
I think this is invalid, so I am closing it.
^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2015-08-20 16:27 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2010-08-23 18:01 [Bug preprocessor/45386] New: [4.6 Regression] valgrind reports out-of-bounds read in search_line_sse2 zsojka at seznam dot cz
2010-08-23 20:05 ` [Bug preprocessor/45386] " rguenth at gcc dot gnu dot org
2010-09-02 11:19 ` rguenth at gcc dot gnu dot org
[not found] <bug-45386-4@http.gcc.gnu.org/bugzilla/>
2010-09-29 16:17 ` tromey at gcc dot gnu.org
2015-08-20 15:56 ` pinskia at gcc dot gnu.org
2015-08-20 16:27 ` manu at gcc dot gnu.org
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