Hi,
I have a large, complex, non-public project where I used to identify
performance issues using callgrind (via QtCreator) but that stopped
working. Now I don't get any function names, instead I get
"0x0123456789" or similar.
I created a very simple project and it still doesn't work as expected.
You can find the project here:
https://github.com/abrock/callgrind-test
I build it like this:
g++ -g main.cpp
and run it like this:
valgrind --tool=callgrind ./a.out
which gives me this output:
==8960== Callgrind, a call-graph generating cache profiler
==8960== Copyright (C) 2002-2017, and GNU GPL'd, by Josef Weidendorfer
et al.
==8960== Using Valgrind-3.13.0 and LibVEX; rerun with -h for copyright info
==8960== Command: ./a.out
==8960==
==8960== For interactive control, run 'callgrind_control -h'.
Hello World!
The sum is: 4950
The sum is: 49995000
==8960==
==8960== Events: Ir
==8960== Collected : 14374235
==8960==
==8960== I refs: 14,374,235
Then I run kcachegrind:
kcachegrind callgrind.out.8960
which gives me this result:
https://imgur.com/a/anljbAL
It shows the two trees for the two functions with different runtimes as
expected, but no function names and complains about missing debug
symbols and doesn't seem to know the name of the executable.
This is my g++ version:
g++ -v
Using built-in specs.
COLLECT_GCC=g++
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/8/lto-wrapper
OFFLOAD_TARGET_NAMES=nvptx-none
OFFLOAD_TARGET_DEFAULT=1
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Debian 8.2.0-6'
--with-bugurl=file:///usr/share/doc/gcc-8/README.Bugs
--enable-languages=c,ada,c++,go,brig,d,fortran,objc,obj-c++
--prefix=/usr --with-gcc-major-version-only --program-suffix=-8
--program-prefix=x86_64-linux-gnu- --enable-shared
--enable-linker-build-id --libexecdir=/usr/lib
--without-included-gettext --enable-threads=posix --libdir=/usr/lib
--enable-nls --with-sysroot=/ --enable-clocale=gnu
--enable-libstdcxx-debug --enable-libstdcxx-time=yes
--with-default-libstdcxx-abi=new --enable-gnu-unique-object
--disable-vtable-verify --enable-libmpx --enable-plugin
--enable-default-pie --with-system-zlib --with-target-system-zlib
--enable-objc-gc=auto --enable-multiarch --disable-werror
--with-arch-32=i686 --with-abi=m64 --with-multilib-list=m32,m64,mx32
--enable-multilib --with-tune=generic
--enable-offload-targets=nvptx-none --without-cuda-driver
--enable-checking=release --build=x86_64-linux-gnu
--host=x86_64-linux-gnu --target=x86_64-linux-gnu
Thread model: posix
gcc version 8.2.0 (Debian 8.2.0-6)
I'm out of ideas, did I do something wrong? Feels like I missed
something totally obvious.
I tried the git version of valgrind which works as expected for the
simple test program but crashes for my large project:
valgrind: m_debuginfo/debuginfo.c:738 (check_CFSI_related_invariants):
Assertion 'cfsi_fits' failed.
host stacktrace:
==24946==at 0x58022AB4: show_sched_status_wrk (m_libcassert.c:369)
==24946==by 0x58022BC7: report_and_quit (m_libcassert.c:440)
==24946==by 0x58022D59: vgPlain_assert_fail (m_libcassert.c:506)
==24946==by 0x58049F7F: vgPlain_di_notify_mmap (debuginfo.c:738)
==24946==by 0x5807A96B: vgModuleLocal_generic_PRE_sys_mmap
(syswrap-generic.c:2402)
==24946==by 0x5808640F: vgSysWrap_amd64_linux_sys_mmap_before
(syswrap-amd64-linux.c:404)
==24946==by 0x58076081: vgPlain_client_syscall (syswrap-main.c:1863)
==24946==by 0x58072C1A: handle_syscall (scheduler.c:1176)
==24946==by 0x580744D6: vgPlain_scheduler (scheduler.c:1498)
==24946==by 0x580D5330: run_a_thread_NORETURN (syswrap-linux.c:103)
sched status:
running_tid=1
Thread 1: status = VgTs_Runnable syscall 9 (lwpid 24946)
==24946==at 0x401A693: mmap (mmap64.c:52)
==24946==by 0x40060AD: _dl_map_object_from_fd (dl-map-segments.h:94)
==24946==by 0x400890E: _dl_map_object (dl-load.c:2461)
==24946==by 0x400D061: openaux (dl-deps.c:63)
==24946==by 0x401950A: _dl_catch_exception (dl-error-skeleton.c:196)
==24946==by 0x400D2F2: _dl_map_object_deps (dl-deps.c:249)
==24946==by 0x4003D95: dl_main (rtld.c:1726)
==24946==by 0x401862F: _dl_sysdep_start (dl-sysdep.c:253)
==24946==by 0x40020D7: _dl_start (rtld.c:414)
==24946==by 0x4001217: ??? (in /lib/x86_64-linux-gnu/ld-2.27.so)
client stack range: [0x1FFEFFE000 0x1FFF000FFF] client SP: 0x1FFEFFE258
valgrind stack range: [0x1002A8E000 0x1002B8DFFF] top usage: 16248 of
1048576
Best Regards,
Alexander
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