https://bugs.kde.org/show_bug.cgi?id=390871
Bug ID: 390871
Summary: ELF debug info reader confused with multiple .rodata*
sections
Product: valgrind
Version: unspecified
Platform: Other
OS: Linux
Status: UNCONFIRMED
Severity: normal
Priority: NOR
Component: general
Assignee: jsew...@acm.org
Reporter: jrei...@bitwagon.com
Target Milestone: ---
Slightly edited from https://bugs.kde.org/show_bug.cgi?id=353802#c10 :
--18142-- WARNING: Serious error when reading debug info
--18142-- When reading debug info from
/export/home/paulf/tools/gcc/lib/libstdc++.so.6.0.25:
--18142-- Can't make sense of .rodata section mapping
(GCC SVN head, Solaris 11.3, Valgrind git head).
This problem has appeared under valgrind git tip:
commit dcb83cf846b529104cd528cd749b61f35deda476
Author: Rhys Kidd <rhysk...@gmail.com>
Date: Sun Feb 11 17:16:38 2018 -0500
The problem was reported by Paul Floyd in [Valgrind-users] ten days ago on
2018-02-11 with Subject: "rodata warning".
The cause appears to be hundreds of Elf32_Shdr (also Elf64_Shdr) with names
.rodata and/or .rodata.<subr_name>. Sample:
Section Headers:
[Nr] Name Type Addr Off Size ES Flg Lk Inf
Al
[15] .rodata._ZNKSt10l PROGBITS 00093a88 093a88 000010 01 AMS 0 0
1
[16] .rodata._ZNKSt12_ PROGBITS 00093a98 093a98 000008 01 AMS 0 0
1
[17] .rodata._ZNKSt12_ PROGBITS 00093aa0 093aa0 000007 01 AMS 0 0
1
[18] .rodata PROGBITS 00093ac0 093ac0 003504 00 A 0 0
32
[19] .rodata._ZTSNSt12 PROGBITS 00096fe0 096fe0 00002c 00 A 0 0
32
[20] .rodata._ZTSNSt12 PROGBITS 00097020 097020 00002b 00 A 0 0
32
[21] .rodata._ZNSt6chr PROGBITS 0009704b 09704b 000001 00 A 0 0
1
[22] .rodata._ZNSt6chr PROGBITS 0009704c 09704c 000001 00 A 0 0
1
[23] .rodata._ZNKSt9ba PROGBITS 0009704d 09704d 00000f 01 AMS 0 0
1
[24] .rodata._ZNKSt16b PROGBITS 0009705c 09705c 000016 01 AMS 0 0
1
[25] .rodata._ZNKSt20b PROGBITS 00097072 097072 00001a 01 AMS 0 0
1
[26] .rodata._ZNKSt8ba PROGBITS 0009708c 09708c 00000e 01 AMS 0 0
1
[27] .rodata._ZNKSt10b PROGBITS 0009709a 09709a 000010 01 AMS 0 0
1
[28] .rodata PROGBITS 000970ac 0970ac 0002b4 01 AMS 0 0
4
[29] .rodata._ZNKSt9ex PROGBITS 00097360 097360 00000f 01 AMS 0 0
1
and there are 639 more .rodata* Sections in that one file.
Inspection shows that the .rodata* are adjacent after considering alignment.
Therefore a workaround might be for the debuginfo reader to aggregate them all
into a single internal .rodata section. A simple proposed patch is:
https://bugsfiles.kde.org/attachment.cgi?id=110638
[This is a different cause than the related
https://bugs.kde.org/show_bug.cgi?id=353802 , and therefore Ivo Raisr requested
a new bug report.]
--
You are receiving this mail because:
You are watching all bug changes.
