public inbox for gcc-bugs@sourceware.org
help / color / mirror / Atom feed
* [Bug middle-end/44817] New: Stage2/stage3 genautomata has invalid memory access
@ 2010-07-04 23:39 hjl dot tools at gmail dot com
2010-07-05 0:06 ` [Bug middle-end/44817] " hjl dot tools at gmail dot com
` (4 more replies)
0 siblings, 5 replies; 6+ messages in thread
From: hjl dot tools at gmail dot com @ 2010-07-04 23:39 UTC (permalink / raw)
To: gcc-bugs
On Linux/x86-64, revision 161806 gave:
# /usr/bin/valgrind --tool=memcheck build/genautomata
/export/gnu/import/svn/gcc-test/src-trunk/gcc/config/i386/i386.md
insn-conditions.md > /dev/null
==5903== Memcheck, a memory error detector
==5903== Copyright (C) 2002-2009, and GNU GPL'd, by Julian Seward et al.
==5903== Using Valgrind-3.5.0 and LibVEX; rerun with -h for copyright info
==5903== Command: build/genautomata
/export/gnu/import/svn/gcc-test/src-trunk/gcc/config/i386/i386.md
insn-conditions.md
==5903==
==5903== Invalid read of size 8
==5903== at 0x401BE7: check_absence_pattern_sets (genautomata.c:4353)
==5903== by 0x40D85F: create_automata (genautomata.c:3503)
==5903== by 0x4101D5: expand_automata (genautomata.c:9093)
==5903== by 0x4115B8: main (genautomata.c:9543)
==5903== Address 0x1c is not stack'd, malloc'd or (recently) free'd
==5903==
==5903==
==5903== Process terminating with default action of signal 11 (SIGSEGV)
==5903== Access not within mapped region at address 0x1C
==5903== at 0x401BE7: check_absence_pattern_sets (genautomata.c:4353)
==5903== by 0x40D85F: create_automata (genautomata.c:3503)
==5903== by 0x4101D5: expand_automata (genautomata.c:9093)
==5903== by 0x4115B8: main (genautomata.c:9543)
==5903== If you believe this happened as a result of a stack
==5903== overflow in your program's main thread (unlikely but
==5903== possible), you can try to increase the size of the
==5903== main thread stack using the --main-stacksize= flag.
==5903== The main thread stack size used in this run was 8388608.
==5903==
==5903== HEAP SUMMARY:
==5903== in use at exit: 11,187,082 bytes in 73,185 blocks
==5903== total heap usage: 83,419 allocs, 10,234 frees, 32,694,074 bytes
allocated
==5903==
--
Summary: Stage2/stage3 genautomata has invalid memory access
Product: gcc
Version: 4.5.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: middle-end
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: hjl dot tools at gmail dot com
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44817
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug middle-end/44817] Stage2/stage3 genautomata has invalid memory access
2010-07-04 23:39 [Bug middle-end/44817] New: Stage2/stage3 genautomata has invalid memory access hjl dot tools at gmail dot com
@ 2010-07-05 0:06 ` hjl dot tools at gmail dot com
2010-07-05 0:20 ` hjl dot tools at gmail dot com
` (3 subsequent siblings)
4 siblings, 0 replies; 6+ messages in thread
From: hjl dot tools at gmail dot com @ 2010-07-05 0:06 UTC (permalink / raw)
To: gcc-bugs
------- Comment #1 from hjl dot tools at gmail dot com 2010-07-05 00:05 -------
The code is
0000000000000260 <check_absence_pattern_sets>:
260: 41 57 push %r15
262: 44 8b 1d 00 00 00 00 mov 0x0(%rip),%r11d # 269
<check_absence_pattern_sets+0x9>
269: b8 01 00 00 00 mov $0x1,%eax
26e: 41 56 push %r14
270: 45 85 db test %r11d,%r11d
273: 41 55 push %r13
275: 41 54 push %r12
277: 55 push %rbp
278: 53 push %rbx
279: 0f 8e 94 00 00 00 jle 313
<check_absence_pattern_sets+0xb3>
27f: 48 8b 05 00 00 00 00 mov 0x0(%rip),%rax # 286
<check_absence_pattern_sets+0x26>
286: 48 8b 0d 00 00 00 00 mov 0x0(%rip),%rcx # 28d
<check_absence_pattern_sets+0x2d>
28d: 49 89 f5 mov %rsi,%r13
290: 4c 8b 35 00 00 00 00 mov 0x0(%rip),%r14 # 297
<check_absence_pattern_sets+0x37>
297: 45 31 e4 xor %r12d,%r12d
29a: 48 89 44 24 f0 mov %rax,-0x10(%rsp)
29f: 48 89 4c 24 f8 mov %rcx,-0x8(%rsp)
^^^^^^^^^^^^^^^^^^^^^^^ Is this safe?
...
350: 48 8b 4c 24 f8 mov -0x8(%rsp),%rcx
^^^^^^^^^^^ This is 0.
355: 48 98 cltq
357: 4c 8b 14 c1 mov (%rcx,%rax,8),%r10
35b: eb 80 jmp 2dd
<check_absence_pattern_sets+0x7d>
--
hjl dot tools at gmail dot com changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |ubizjak at gmail dot com
Version|4.5.1 |4.6.0
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44817
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug middle-end/44817] Stage2/stage3 genautomata has invalid memory access
2010-07-04 23:39 [Bug middle-end/44817] New: Stage2/stage3 genautomata has invalid memory access hjl dot tools at gmail dot com
2010-07-05 0:06 ` [Bug middle-end/44817] " hjl dot tools at gmail dot com
@ 2010-07-05 0:20 ` hjl dot tools at gmail dot com
2010-07-05 14:09 ` ubizjak at gmail dot com
` (2 subsequent siblings)
4 siblings, 0 replies; 6+ messages in thread
From: hjl dot tools at gmail dot com @ 2010-07-05 0:20 UTC (permalink / raw)
To: gcc-bugs
------- Comment #2 from hjl dot tools at gmail dot com 2010-07-05 00:20 -------
There is a 128byte red-zone. The code seems OK.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44817
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug middle-end/44817] Stage2/stage3 genautomata has invalid memory access
2010-07-04 23:39 [Bug middle-end/44817] New: Stage2/stage3 genautomata has invalid memory access hjl dot tools at gmail dot com
2010-07-05 0:06 ` [Bug middle-end/44817] " hjl dot tools at gmail dot com
2010-07-05 0:20 ` hjl dot tools at gmail dot com
@ 2010-07-05 14:09 ` ubizjak at gmail dot com
2010-07-05 15:57 ` hjl dot tools at gmail dot com
2010-07-26 18:41 ` hjl dot tools at gmail dot com
4 siblings, 0 replies; 6+ messages in thread
From: ubizjak at gmail dot com @ 2010-07-05 14:09 UTC (permalink / raw)
To: gcc-bugs
------- Comment #3 from ubizjak at gmail dot com 2010-07-05 14:09 -------
So, what is the problem here?
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44817
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug middle-end/44817] Stage2/stage3 genautomata has invalid memory access
2010-07-04 23:39 [Bug middle-end/44817] New: Stage2/stage3 genautomata has invalid memory access hjl dot tools at gmail dot com
` (2 preceding siblings ...)
2010-07-05 14:09 ` ubizjak at gmail dot com
@ 2010-07-05 15:57 ` hjl dot tools at gmail dot com
2010-07-26 18:41 ` hjl dot tools at gmail dot com
4 siblings, 0 replies; 6+ messages in thread
From: hjl dot tools at gmail dot com @ 2010-07-05 15:57 UTC (permalink / raw)
To: gcc-bugs
------- Comment #4 from hjl dot tools at gmail dot com 2010-07-05 15:57 -------
This may be a valgrind bug. I will investigate.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44817
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug middle-end/44817] Stage2/stage3 genautomata has invalid memory access
2010-07-04 23:39 [Bug middle-end/44817] New: Stage2/stage3 genautomata has invalid memory access hjl dot tools at gmail dot com
` (3 preceding siblings ...)
2010-07-05 15:57 ` hjl dot tools at gmail dot com
@ 2010-07-26 18:41 ` hjl dot tools at gmail dot com
4 siblings, 0 replies; 6+ messages in thread
From: hjl dot tools at gmail dot com @ 2010-07-26 18:41 UTC (permalink / raw)
To: gcc-bugs
------- Comment #5 from hjl dot tools at gmail dot com 2010-07-26 18:41 -------
It is a valgrind bug. I opened:
https://bugzilla.redhat.com/show_bug.cgi?id=618360
--
hjl dot tools at gmail dot com changed:
What |Removed |Added
----------------------------------------------------------------------------
URL| |https://bugzilla.redhat.com/
| |show_bug.cgi?id=618360
Status|UNCONFIRMED |RESOLVED
Resolution| |INVALID
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44817
^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2010-07-26 18:41 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2010-07-04 23:39 [Bug middle-end/44817] New: Stage2/stage3 genautomata has invalid memory access hjl dot tools at gmail dot com
2010-07-05 0:06 ` [Bug middle-end/44817] " hjl dot tools at gmail dot com
2010-07-05 0:20 ` hjl dot tools at gmail dot com
2010-07-05 14:09 ` ubizjak at gmail dot com
2010-07-05 15:57 ` hjl dot tools at gmail dot com
2010-07-26 18:41 ` hjl dot tools at gmail dot com
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).