symbol will appear when I remove flto in CMakeLists.txt. But I have to enable flto.. On Thu, Oct 15, 2020 at 4:40 PM Jiany Wu <wujianyue000@xxxxxxxxx> wrote: > I tried to reproduce with ubuntu, with this zip. > > Could you please give a hand about this issue? thanks indeed, seems no > matter what gcc version above 9.1.0, will also have this issue. > > ## Reproduce step > cd build > cmake .. > make > readelf -a libtime_opt.so | grep foo > > output is: > 00000201020 000a00000007 R_X86_64_JUMP_SLO 000000000000066a _Z3foov + > 0 > 10: 000000000000066a 18 FUNC GLOBAL DEFAULT 12 _Z3foov > 49: 000000000000066a 18 FUNC GLOBAL DEFAULT 12 _Z3foov > > addr2line -e libtime_opt.so -f 0x66a > > output is: > _Z3foov > ??:? > > ./Jianyue > > On Wed, Oct 14, 2020 at 5:24 PM Jiany Wu <wujianyue000@xxxxxxxxx> wrote: > >> Seems gcc help is missing, add back gcc help >> >> On Wed, Oct 14, 2020 at 5:22 PM Jiany Wu <wujianyue000@xxxxxxxxx> wrote: >> >>> When try to check Line Table, seems there are many errors saying There >>> is a hole. I checked the OK version, seems also has holes, but not so many >>> holes;-) >>> >>> # readelf --debug-dump=loc libfoo.so | head >>> readelf: libfoo.so: Warning: Location lists in .debug_loc >>> section start at 0x6 >>> readelf: libfoo.so: Warning: There is a hole [0x52 - 0x54] in .debug_loc >>> section. >>> readelf: libfoo.so: Warning: There is a hole [0x77 - 0x7d] in .debug_loc >>> section. >>> readelf: libfoo.so: Warning: There is a hole [0xc6 - 0xd2] in .debug_loc >>> section. >>> Contents of the .debug_loc section: >>> readelf: libfoo.so: Warning: >>> There is a hole [0x157 - 0x163] in .debug_loc section. >>> Offset Begin End Expression >>> 00000006 0000000000257a70 0000000000257a81 (DW_OP_reg5 (rdi)) >>> 00000019 0000000000257a81 0000000000257aae (DW_OP_reg6 (rbp)) >>> 0000002c 0000000000257aae 0000000000257aaf (DW_OP_GNU_entry_value: ( >>> DW_OP_reg5 (rdi)); DW_OP_stack_value) >>> 00000042 <End of list> >>> readelf: libfoo.so: Warning: There is a hole [0x1fa - 0x202] in . >>> debug_loc section. >>> 00000054 0000000000257a8e 0000000000257a98 (DW_OP_reg3 (rbx)) >>> 00000067 <End of list> >>> 0000007d 0000000000257a7c 0000000000257a8e (DW_OP_reg3 (rbx)) >>> readelf: libfoo.so: Warning: There is a hole [0x25e - 0x260] in . >>> debug_loc section. >>> >>> On Wed, Oct 14, 2020 at 4:30 PM Jiany Wu <wujianyue000@xxxxxxxxx> wrote: >>> >>>> Also tried -flto=thin -ffat-lto-objects, result seems same, still can't >>>> find file and line. >>>> >>>> On Wed, Oct 14, 2020 at 2:58 PM Jiany Wu <wujianyue000@xxxxxxxxx> >>>> wrote: >>>> >>>>> x86_64-pc-linux-gnu-gcc *.a(many internal .a, checked, they all built >>>>> with gcc 9.1.0) -ldpdk -Wl,--no-whole-archive -lz -llzma -lcurl -lssl >>>>> -lcrypto -lcrypt -lcap -lpthread -lrt -lstdc++ -ldl -lm -lsctp -lpcap >>>>> -lminizip -o libfoo.so >>>>> >>>>> >>>>> On Wed, Oct 14, 2020 at 2:56 PM Jiany Wu <wujianyue000@xxxxxxxxx> >>>>> wrote: >>>>> >>>>>> It has different static libraries, shared libraries, so different GCC >>>>>> used, like 6.4.1(assume from other shared libraries), project itself is >>>>>> using 9.1.0. >>>>>> >>>>>> On Wed, Oct 14, 2020 at 2:54 PM Jiany Wu <wujianyue000@xxxxxxxxx> >>>>>> wrote: >>>>>> >>>>>>> I also tried to use -flto -fno-fat-lto-objects, but seems still >>>>>>> not working. >>>>>>> >>>>>>> strings -a libfoo.so | grep GNU.*march >>>>>>> GNU C17 9.1.0 -m64 -march=corei7 -g -O2 -O3 >>>>>>> -feliminate-unused-debug-types -fPIC >>>>>>> GNU C17 9.1.0 -m64 -march=corei7 -mavx2 -g -O2 -O3 >>>>>>> -feliminate-unused-debug-types -fPIC >>>>>>> GNU C17 9.1.0 -m64 -march=corei7 -g -O2 >>>>>>> -feliminate-unused-debug-types -fPIC >>>>>>> GNU C17 9.1.0 -m64 -march=corei7 -g -O2 -O3 >>>>>>> -feliminate-unused-debug-types -fno-strict-aliasing -fPIC >>>>>>> GNU C99 9.1.0 -m64 -march=corei7 -g -O2 -O3 -std=gnu99 >>>>>>> -feliminate-unused-debug-types -fPIC >>>>>>> GNU C17 9.1.0 -m64 -march=corei7 -g -O2 -O3 >>>>>>> -feliminate-unused-debug-types -flax-vector-conversions -fPIC >>>>>>> GNU C17 9.1.0 -m64 -march=corei7 -g -O2 -Ofast >>>>>>> -feliminate-unused-debug-types -fno-prefetch-loop-arrays -fPIC >>>>>>> GNU C17 9.1.0 -m64 -march=corei7 -g -g -O2 -O3 >>>>>>> -feliminate-unused-debug-types -fPIC >>>>>>> GNU C17 9.1.0 -P -m64 -march=tremont -mtune=tremont -mfpmath=sse >>>>>>> -msse4.2 -ggdb3 -g3 -O3 -ftree-vectorize -fno-dwarf2-cfi-asm >>>>>>> -funwind-tables -fPIC -ftls-model=initial-exec -flto -fno-fat-lto-objects >>>>>>> -fno-strict-aliasing -fasynchronous-unwind-tables -fmessage-length=0 >>>>>>> GNU C++11 9.1.0 -P -m64 -march=tremont -mtune=tremont -mfpmath=sse >>>>>>> -msse4.2 -ggdb3 -g3 -O3 -std=c++11 -fno-exceptions -fPIC >>>>>>> -ftls-model=initial-exec -flto -fno-fat-lto-objects -fno-strict-aliasing >>>>>>> -fasynchronous-unwind-tables -fmessage-length=0 >>>>>>> GNU C++98 9.1.0 -P -m64 -march=tremont -mtune=tremont -mfpmath=sse >>>>>>> -msse4.2 -ggdb3 -g3 -O3 -std=c++98 -fPIC -ftls-model=initial-exec -flto >>>>>>> -fno-fat-lto-objects -fno-strict-aliasing -fasynchronous-unwind-tables >>>>>>> -fmessage-length=0 >>>>>>> GNU C17 9.1.0 -P -m64 -march=tremont -mtune=tremont -mfpmath=sse >>>>>>> -msse4.2 -ggdb3 -g3 -O3 -fvisibility=hidden -ftree-vectorize >>>>>>> -fno-dwarf2-cfi-asm -funwind-tables -fPIC -ftls-model=initial-exec -flto >>>>>>> -fno-fat-lto-objects -fno-strict-aliasing -fasynchronous-unwind-tables >>>>>>> -fmessage-length=0 >>>>>>> GNU C++14 9.1.0 -P -m64 -march=tremont -mtune=tremont -mfpmath=sse >>>>>>> -msse4.2 -ggdb3 -g3 -O3 -fvisibility=hidden -fPIC -ftls-model=initial-exec >>>>>>> -flto -fno-fat-lto-objects -fno-strict-aliasing >>>>>>> -fasynchronous-unwind-tables -fmessage-length=0 >>>>>>> GNU C++14 9.1.0 -P -m64 -march=tremont -mtune=tremont -mfpmath=sse >>>>>>> -msse4.2 -ggdb3 -g3 -O3 -fPIC -ftls-model=initial-exec -flto >>>>>>> -fno-fat-lto-objects -fno-strict-aliasing -fasynchronous-unwind-tables >>>>>>> -fmessage-length=0 >>>>>>> GNU C17 9.1.0 -P -m64 -march=tremont -mtune=tremont -mfpmath=sse >>>>>>> -msse4.2 -ggdb3 -g3 -O3 -O0 -ftree-vectorize -fno-dwarf2-cfi-asm >>>>>>> -funwind-tables -fPIC -ftls-model=initial-exec -flto -fno-fat-lto-objects >>>>>>> -fno-strict-aliasing -fasynchronous-unwind-tables -fmessage-length=0 >>>>>>> GNU C17 9.1.0 -P -m64 -march=tremont -mtune=tremont -mfpmath=sse >>>>>>> -msse4.2 -ggdb3 -g3 -O3 -fdefer-pop -fmerge-constants -fthread-jumps >>>>>>> -fif-conversion -fif-conversion2 -fguess-branch-probability >>>>>>> -fcprop-registers -foptimize-sibling-calls -fcse-follow-jumps >>>>>>> -frerun-cse-after-loop -fgcse -fgcse-lm -fgcse-sm -fgcse-las >>>>>>> -fdelete-null-pointer-checks -fexpensive-optimizations -fsched-interblock >>>>>>> -fsched-spec -fcaller-saves -fpeephole2 -freorder-blocks >>>>>>> -freorder-functions -funit-at-a-time -falign-functions -falign-jumps >>>>>>> -falign-loops -falign-labels -fcrossjumping -finline-functions >>>>>>> -ftree-vectorize -fno-dwarf2-cfi-asm -funwind-tables -fPIC >>>>>>> -ftls-model=initial-exec -flto -fno-fat-lto-objects -fno-strict-aliasing >>>>>>> -fasynchronous-unwind-tables -fmessage-length=0 >>>>>>> GNU C11 9.1.0 -P -m64 -march=tremont -mtune=tremont -mfpmath=sse >>>>>>> -msse4.2 -ggdb3 -g3 -O3 -std=gnu11 -ftree-vectorize -fno-dwarf2-cfi-asm >>>>>>> -funwind-tables -fPIC -ftls-model=initial-exec -flto -fno-fat-lto-objects >>>>>>> -fno-strict-aliasing -fasynchronous-unwind-tables -fmessage-length=0 >>>>>>> GNU C++11 9.1.0 -P -m64 -march=tremont -mtune=tremont -mfpmath=sse >>>>>>> -msse4.2 -ggdb3 -g3 -O3 -std=c++11 -fPIC -ftls-model=initial-exec -flto >>>>>>> -fno-fat-lto-objects -fno-strict-aliasing -fasynchronous-unwind-tables >>>>>>> -fmessage-length=0 >>>>>>> GNU C++14 9.1.0 -P -m64 -march=tremont -mtune=tremont -mfpmath=sse >>>>>>> -msse4.2 -ggdb3 -g3 -O3 -std=c++14 -fpermissive -fPIC >>>>>>> -ftls-model=initial-exec -flto -fno-fat-lto-objects -fno-strict-aliasing >>>>>>> -fasynchronous-unwind-tables -fmessage-length=0 >>>>>>> GNU C++14 9.1.0 -m64 -march=tremont -mtune=tremont -mfpmath=sse >>>>>>> -msse4.2 -ggdb3 -O3 -std=c++14 -fPIC -flto -fno-fat-lto-objects >>>>>>> -ftls-model=initial-exec -fvisibility=hidden >>>>>>> GNU C17 9.1.0 -m64 -march=tremont -mtune=tremont -mfpmath=sse >>>>>>> -msse4.2 -ggdb3 -O3 -fPIC -flto -fno-fat-lto-objects >>>>>>> -ftls-model=initial-exec -fvisibility=hidden >>>>>>> GNU C11 6.4.1 20180518 -mtune=generic -march=x86-64 -g -O2 >>>>>>> -std=gnu11 -fgnu89-inline -feliminate-unused-debug-types >>>>>>> -fmerge-all-constants -fno-stack-protector -frounding-math -fno-math-errno >>>>>>> -fPIC -ftls-model=initial-exec >>>>>>> >>>>>>> On Wed, Oct 14, 2020 at 2:53 PM Jiany Wu <wujianyue000@xxxxxxxxx> >>>>>>> wrote: >>>>>>> >>>>>>>> Hi Dan >>>>>>>> >>>>>>>> Sorry, I put the command wrongly. >>>>>>>> I abbreviated ths steps, actually I'm using libfoo.optdebug, which >>>>>>>> is copied from original file, without flto option, same file, same build, >>>>>>>> addr2line has file and line. >>>>>>>> >>>>>>>> objcopy --only-keep-debug libfoo.so libfoo.optdebug >>>>>>>> >>>>>>>> x86_64-pc-linux-gnu-addr2line -e libfoo.optdebug 0x6a1e20 -f >>>>>>>> foo >>>>>>>> ??:? >>>>>>>> >>>>>>>> ./Jianyue >>>>>>>> >>>>>>>> >>>>>>>> On Wed, Oct 14, 2020 at 2:16 PM Dan Kegel <dank@xxxxxxxxx> wrote: >>>>>>>> >>>>>>>>> Did you want to run addr2line on libfoo.so instead of the default >>>>>>>>> a.out? If so, you may need to add -e libfoo.so or the like. >>>>>>>>> >>>>>>>>> Jiany Wu via Gcc-help <gcc-help@xxxxxxxxxxx> schrieb am Di., 13. >>>>>>>>> Okt. 2020, 22:53: >>>>>>>>> >>>>>>>>>> BTW, I used gcc-ar, and only -flto is used for lto optimization, >>>>>>>>>> without >>>>>>>>>> -fuse-linker-plugin, I had tried to add it, but seems the same. >>>>>>>>>> >>>>>>>>>> On Wed, Oct 14, 2020 at 1:47 PM Jiany Wu <wujianyue000@xxxxxxxxx> >>>>>>>>>> wrote: >>>>>>>>>> >>>>>>>>>> > Hi, >>>>>>>>>> > >>>>>>>>>> > Could you help give a hand about this issue? Or any suggestions? >>>>>>>>>> > >>>>>>>>>> > Can find function but can't find file and line. >>>>>>>>>> > Thanks indeed in advance. >>>>>>>>>> > >>>>>>>>>> > >>>>>>>>>> > >>>>>>>>>> > $ readelf -a libfoo.so | grep foo >>>>>>>>>> > >>>>>>>>>> > 9374: 0000000000783080 179 FUNC GLOBAL DEFAULT 12 foo >>>>>>>>>> > >>>>>>>>>> > 30182: 0000000000783080 179 FUNC GLOBAL DEFAULT 12 foo >>>>>>>>>> > >>>>>>>>>> > >>>>>>>>>> > >>>>>>>>>> > $ addr2line 0x783080 -f >>>>>>>>>> > >>>>>>>>>> > foo >>>>>>>>>> > >>>>>>>>>> > ??:? >>>>>>>>>> > >>>>>>>>>> > >>>>>>>>>> > Gcc version: >>>>>>>>>> > >>>>>>>>>> > Target: x86_64-poky-linux >>>>>>>>>> > >>>>>>>>>> > Configured with: >>>>>>>>>> > ../../../../../../work-shared/gcc-9.1.0-r0/gcc-9.1.0/configure >>>>>>>>>> > --build=x86_64-linux --host=x86_64-pokysdk-linux >>>>>>>>>> --target=x86_64-poky-linux >>>>>>>>>> > --prefix=/opt/poky/2.1.1/sysroots/x86_64-pokysdk-linux/usr >>>>>>>>>> > --exec_prefix=/opt/poky/2.1.1/sysroots/x86_64-pokysdk-linux/usr >>>>>>>>>> > >>>>>>>>>> --bindir=/opt/poky/2.1.1/sysroots/x86_64-pokysdk-linux/usr/bin/x86_64-poky-linux >>>>>>>>>> > >>>>>>>>>> --sbindir=/opt/poky/2.1.1/sysroots/x86_64-pokysdk-linux/usr/bin/x86_64-poky-linux >>>>>>>>>> > >>>>>>>>>> --libexecdir=/opt/poky/2.1.1/sysroots/x86_64-pokysdk-linux/usr/libexec/x86_64-poky-linux >>>>>>>>>> > >>>>>>>>>> --datadir=/opt/poky/2.1.1/sysroots/x86_64-pokysdk-linux/usr/share >>>>>>>>>> > --sysconfdir=/opt/poky/2.1.1/sysroots/x86_64-pokysdk-linux/etc >>>>>>>>>> > >>>>>>>>>> --sharedstatedir=/opt/poky/2.1.1/sysroots/x86_64-pokysdk-linux/com >>>>>>>>>> > >>>>>>>>>> --localstatedir=/opt/poky/2.1.1/sysroots/x86_64-pokysdk-linux/var >>>>>>>>>> > >>>>>>>>>> --libdir=/opt/poky/2.1.1/sysroots/x86_64-pokysdk-linux/usr/lib/x86_64-poky-linux >>>>>>>>>> > >>>>>>>>>> --includedir=/opt/poky/2.1.1/sysroots/x86_64-pokysdk-linux/usr/include >>>>>>>>>> > >>>>>>>>>> --oldincludedir=/opt/poky/2.1.1/sysroots/x86_64-pokysdk-linux/usr/include >>>>>>>>>> > >>>>>>>>>> --infodir=/opt/poky/2.1.1/sysroots/x86_64-pokysdk-linux/usr/share/info >>>>>>>>>> > >>>>>>>>>> --mandir=/opt/poky/2.1.1/sysroots/x86_64-pokysdk-linux/usr/share/man >>>>>>>>>> > --disable-silent-rules >>>>>>>>>> > --disable-dependency-tracking--enable-clocale=generic >>>>>>>>>> --with-gnu-ld >>>>>>>>>> > --enable-shared --enable-languages=c,c++ --enable-threads=posix >>>>>>>>>> > --enable-multilib --enable-c99 --enable-long-long >>>>>>>>>> --enable-symvers=gnu >>>>>>>>>> > --program-prefix=x86_64-poky-linux- --without-local-prefix >>>>>>>>>> --enable-lto >>>>>>>>>> > --disable-libssp --enable-libitm --disable-bootstrap >>>>>>>>>> --disable-libmudflap >>>>>>>>>> > --with-system-zlib --with-linker-hash-style=gnu >>>>>>>>>> --enable-linker-build-id >>>>>>>>>> > --with-ppl=no --with-cloog=no --enable-checking=release >>>>>>>>>> > --enable-cheaders=c_global --without-isl >>>>>>>>>> > --with-gxx-include-dir=/not/exist/usr/include/c++/9.1.0 >>>>>>>>>> > --with-sysroot=/not/exist --enable-poison-system-directories >>>>>>>>>> > --disable-static --with-glibc-version=2.28 --enable-__cxa_atexit >>>>>>>>>> > --disable-plugin --enable-fix-cortex-a53-835769 >>>>>>>>>> --enable-__cxa_atexit >>>>>>>>>> > --enable-libmudflap --enable-libgomp --disable-libstdcxx-pch >>>>>>>>>> > >>>>>>>>>> > Thread model: posix >>>>>>>>>> > >>>>>>>>>> > gcc version 9.1.0 (GCC) >>>>>>>>>> > >>>>>>>>>> > >>>>>>>>>> > >>>>>>>>>> > Addr2line version: >>>>>>>>>> > >>>>>>>>>> > GNU addr2line (GNU Binutils) 2.31.0.20180718 >>>>>>>>>> > >>>>>>>>>> > Copyright (C) 2018 Free Software Foundation, Inc. >>>>>>>>>> > >>>>>>>>>> > This program is free software; you may redistribute it under >>>>>>>>>> the terms of >>>>>>>>>> > >>>>>>>>>> > the GNU General Public License version 3 or (at your option) >>>>>>>>>> any later >>>>>>>>>> > version. >>>>>>>>>> > >>>>>>>>>> > This program has absolutely no warranty. >>>>>>>>>> > >>>>>>>>>> > >>>>>>>>>> > >>>>>>>>>> > >>>>>>>>>> > ./Jianyue >>>>>>>>>> > >>>>>>>>>> >>>>>>>>>>
