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* [Bug target/94972] New: Function multi-versioning binary may crash dynamic linker
@ 2020-05-06 13:37 d at ilvokhin dot com
2020-05-06 14:42 ` [Bug target/94972] " marxin at gcc dot gnu.org
2024-02-21 0:52 ` pinskia at gcc dot gnu.org
0 siblings, 2 replies; 3+ messages in thread
From: d at ilvokhin dot com @ 2020-05-06 13:37 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94972
Bug ID: 94972
Summary: Function multi-versioning binary may crash dynamic
linker
Product: gcc
Version: 9.1.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: d at ilvokhin dot com
Target Milestone: ---
Created attachment 48468
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=48468&action=edit
Simplified version of function multi-versioning example
I compiled simple binary (a simplified version of function multi-versioning
example from gcc.gnu.org) and do ldd -u -r on result.
This leads to ldd segfault in __cpu_indicator_init from libgcc_s.so.
Behaviour is observed at least for GCC 9.1.1 and 7.3.1 (both from Red Hat
devtoolset).
$ g++ --version
g++ (GCC) 9.1.1 20190605 (Red Hat 9.1.1-2)
Copyright (C) 2019 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
$ g++ tt.cpp -o cpp
$ ldd -u -r ./cpp
/usr/bin/ldd: line 116: 6148 Segmentation fault (core dumped)
LD_TRACE_LOADED_OBJECTS=1 LD_WARN=yes LD_BIND_NOW=yes
LD_LIBRARY_VERSION=$verify_out LD_VERBOSE= LD_DEBUG="unused" "$@
Backtrace is looks like that:
(gdb) bt
#0 0x00007efccf094c87 in __cpu_indicator_init () from /lib64/libgcc_s.so.1
#1 0x0000000000401178 in ?? ()
#2 0x00007fff5f97e220 in ?? ()
#3 0x00007efccf8bce5f in _dl_relocate_object () from
/lib64/ld-linux-x86-64.so.2
(gdb) disass
Dump of assembler code for function __cpu_indicator_init:
0x00007efccf094c70 <+0>: push %r15
0x00007efccf094c72 <+2>: push %r14
0x00007efccf094c74 <+4>: push %r13
0x00007efccf094c76 <+6>: push %r12
0x00007efccf094c78 <+8>: push %rbp
0x00007efccf094c79 <+9>: xor %ebp,%ebp
0x00007efccf094c7b <+11>: push %rbx
0x00007efccf094c7c <+12>: sub $0x18,%rsp
0x00007efccf094c80 <+16>: mov 0x212351(%rip),%rax #
0x7efccf2a6fd8
=> 0x00007efccf094c87 <+23>: mov (%rax),%eax
0x00007efccf094c89 <+25>: test %eax,%eax
^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug target/94972] Function multi-versioning binary may crash dynamic linker
2020-05-06 13:37 [Bug target/94972] New: Function multi-versioning binary may crash dynamic linker d at ilvokhin dot com
@ 2020-05-06 14:42 ` marxin at gcc dot gnu.org
2024-02-21 0:52 ` pinskia at gcc dot gnu.org
1 sibling, 0 replies; 3+ messages in thread
From: marxin at gcc dot gnu.org @ 2020-05-06 14:42 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94972
Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Last reconfirmed| |2020-05-06
Status|UNCONFIRMED |WAITING
CC| |jakub at gcc dot gnu.org,
| |jwakely.gcc at gmail dot com,
| |marxin at gcc dot gnu.org,
| |mpolacek at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Can't reproduce that on openSUSE Tumbleweed with:
marxin@marxinbox:~/Programming/testcases> g++ -v
Using built-in specs.
COLLECT_GCC=g++
COLLECT_LTO_WRAPPER=/usr/lib64/gcc/x86_64-suse-linux/9/lto-wrapper
OFFLOAD_TARGET_NAMES=hsa:nvptx-none
Target: x86_64-suse-linux
Configured with: ../configure --prefix=/usr --infodir=/usr/share/info
--mandir=/usr/share/man --libdir=/usr/lib64 --libexecdir=/usr/lib64
--enable-languages=c,c++,objc,fortran,obj-c++,ada,go,d
--enable-offload-targets=hsa,nvptx-none=/usr/nvptx-none, --without-cuda-driver
--disable-werror --with-gxx-include-dir=/usr/include/c++/9 --enable-ssp
--disable-libssp --disable-libvtv --disable-cet --disable-libcc1
--enable-plugin --with-bugurl=https://bugs.opensuse.org/
--with-pkgversion='SUSE Linux' --with-slibdir=/lib64 --with-system-zlib
--enable-libstdcxx-allocator=new --disable-libstdcxx-pch --enable-libphobos
--enable-version-specific-runtime-libs --with-gcc-major-version-only
--enable-linker-build-id --enable-linux-futex --enable-gnu-indirect-function
--program-suffix=-9 --without-system-libunwind --enable-multilib
--with-arch-32=x86-64 --with-tune=generic
--with-build-config=bootstrap-lto-lean --enable-link-mutex
--build=x86_64-suse-linux --host=x86_64-suse-linux
Thread model: posix
gcc version 9.3.1 20200406 [revision 6db837a5288ee3ca5ec504fbd5a765817e556ac2]
(SUSE Linux)
marxin@marxinbox:~/Programming/testcases> ldd --version
ldd (GNU libc) 2.31
Copyright (C) 2020 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
Written by Roland McGrath and Ulrich Drepper.
I'm adding RedHat guys to CC.
^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug target/94972] Function multi-versioning binary may crash dynamic linker
2020-05-06 13:37 [Bug target/94972] New: Function multi-versioning binary may crash dynamic linker d at ilvokhin dot com
2020-05-06 14:42 ` [Bug target/94972] " marxin at gcc dot gnu.org
@ 2024-02-21 0:52 ` pinskia at gcc dot gnu.org
1 sibling, 0 replies; 3+ messages in thread
From: pinskia at gcc dot gnu.org @ 2024-02-21 0:52 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94972
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
See Also| |https://sourceware.org/bugz
| |illa/show_bug.cgi?id=20019
Resolution|--- |MOVED
Status|WAITING |RESOLVED
--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Looks like it was fixed in dynamic linker.
Anyways no feedback in almost 4 years so closing as moved.
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2024-02-21 0:52 UTC | newest]
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2020-05-06 13:37 [Bug target/94972] New: Function multi-versioning binary may crash dynamic linker d at ilvokhin dot com
2020-05-06 14:42 ` [Bug target/94972] " marxin at gcc dot gnu.org
2024-02-21 0:52 ` pinskia at gcc dot gnu.org
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