Pengetahuan yang dipertingkatkan menggunakan ld dan ldd Linux bersama-sama boleh membantu kami menganalisis sebab kegagalan memuatkan fail perpustakaan pada masa jalan.

PHPz
Lepaskan: 2024-02-20 08:36:03
ke hadapan
1037 orang telah melayarinya

Pengetahuan yang dipertingkatkan menggunakan ld dan ldd Linux bersama-sama boleh membantu kami menganalisis sebab kegagalan memuatkan fail perpustakaan pada masa jalan.

Biasanya, apabila pembangun dan kakitangan operasi dan penyelenggaraan menangani masalah yang perpustakaan bergantung tidak dapat ditemui semasa menjalankan perisian, mereka boleh menggunakan beberapa alat untuk menjejaki proses pemuatan permulaan, seperti strace, gdb, dsb. Selain itu, anda juga boleh menggunakan arahan ld dan ldd untuk membantu menganalisis situasi perpustakaan bergantung untuk menyelesaikan masalah dengan lebih cepat. Alat ini boleh membantu mencari perpustakaan pergantungan yang hilang dan membimbing pengguna untuk mengambil tindakan yang sesuai untuk menyelesaikan masalah masa jalan perisian.

Di sini kami akan menganalisis fail perpustakaan dinamik libmpi_usempif80.so dan perpustakaan dinamik lain yang mana ia bergantung sebagai punca masalah.

Perkenalkan dahulu bagaimana arahan ld boleh membantu kami menganalisis perpustakaan lain yang mana perpustakaan mpi_usempif80 bergantung? Apabila pustaka mpi_usempif80 dimuatkan, laluan manakah dalam sistem semasa pustaka ini akan dicari?

#ld -lmpi_usempif08 –verbose

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Symbols in the DWARF debugging sections are relative to the beginning of the section so we begin them at 0.*/ /* DWARF 1.*/ .debug0 : { *(.debug) } .line 0 : { *(.line) } /* GNU DWARF 1 extensions.*/ .debug_srcinfo0 : { *(.debug_srcinfo) } .debug_sfnames0 : { *(.debug_sfnames) } /* DWARF 1.1 and DWARF 2.*/ .debug_aranges0 : { *(.debug_aranges) } .debug_pubnames 0 : { *(.debug_pubnames) } /* DWARF 2.*/ .debug_info 0 : { *(.debug_info .gnu.linkonce.wi.*) } .debug_abbrev 0 : { *(.debug_abbrev) } .debug_line 0 : { *(.debug_line .debug_line.* .debug_line_end) } .debug_frame0 : { *(.debug_frame) } .debug_str0 : { *(.debug_str) } .debug_loc0 : { *(.debug_loc) } .debug_macinfo0 : { *(.debug_macinfo) } /* SGI/MIPS DWARF 2 extensions.*/ .debug_weaknames 0 : { *(.debug_weaknames) } .debug_funcnames 0 : { *(.debug_funcnames) } .debug_typenames 0 : { *(.debug_typenames) } .debug_varnames0 : { *(.debug_varnames) } /* DWARF 3.*/ .debug_pubtypes 0 : { *(.debug_pubtypes) } .debug_ranges 0 : { *(.debug_ranges) } /* DWARF 5.*/ .debug_addr 0 : { *(.debug_addr) } .debug_line_str 0 : { *(.debug_line_str) } .debug_loclists 0 : { *(.debug_loclists) } .debug_macro0 : { *(.debug_macro) } .debug_names0 : { *(.debug_names) } .debug_rnglists 0 : { *(.debug_rnglists) } .debug_str_offsets 0 : { *(.debug_str_offsets) } .debug_sup0 : { *(.debug_sup) } .gnu.attributes 0 : { KEEP (*(.gnu.attributes)) } /DISCARD/ : { *(.note.GNU-stack) *(.gnu_debuglink) *(.gnu.lto_*) } } ================================================== ld: mode elf_x86_64 attempt to open /usr/local/lib/x86_64-linux-gnu/libmpi_usempif08.so failed attempt to open /usr/local/lib/x86_64-linux-gnu/libmpi_usempif08.a failed attempt to open /lib/x86_64-linux-gnu/libmpi_usempif08.so succeeded /lib/x86_64-linux-gnu/libmpi_usempif08.so libmpi_mpifh.so.40 needed by /lib/x86_64-linux-gnu/libmpi_usempif08.so attempt to open /build/openmpi-RCkqwI/openmpi-4.1.2/debian/build-gfortran/ompi/mpi/fortran/mpif-h/.libs/libmpi_mpifh.so.40 failed attempt to open /build/openmpi-RCkqwI/openmpi-4.1.2/debian/build-gfortran/ompi/.libs/libmpi_mpifh.so.40 failed attempt to open /usr/lib/x86_64-linux-gnu/openmpi/lib/libmpi_mpifh.so.40 failed attempt to open /usr/lib/x86_64-linux-gnu/libfakeroot/libmpi_mpifh.so.40 failed attempt to open /usr/local/lib/libmpi_mpifh.so.40 failed found libmpi_mpifh.so.40 at /usr/lib/x86_64-linux-gnu/libmpi_mpifh.so.40 libmpi.so.40 needed by /lib/x86_64-linux-gnu/libmpi_usempif08.so attempt to open /build/openmpi-RCkqwI/openmpi-4.1.2/debian/build-gfortran/ompi/mpi/fortran/mpif-h/.libs/libmpi.so.40 failed attempt to open /build/openmpi-RCkqwI/openmpi-4.1.2/debian/build-gfortran/ompi/.libs/libmpi.so.40 failed attempt to open /usr/lib/x86_64-linux-gnu/openmpi/lib/libmpi.so.40 failed attempt to open /usr/lib/x86_64-linux-gnu/libfakeroot/libmpi.so.40 failed attempt to open /usr/local/lib/libmpi.so.40 failed found libmpi.so.40 at /usr/lib/x86_64-linux-gnu/libmpi.so.40 libc.so.6 needed by /lib/x86_64-linux-gnu/libmpi_usempif08.so attempt to open /build/openmpi-RCkqwI/openmpi-4.1.2/debian/build-gfortran/ompi/mpi/fortran/mpif-h/.libs/libc.so.6 failed attempt to open /build/openmpi-RCkqwI/openmpi-4.1.2/debian/build-gfortran/ompi/.libs/libc.so.6 failed attempt to open /usr/lib/x86_64-linux-gnu/openmpi/lib/libc.so.6 failed attempt to open /usr/lib/x86_64-linux-gnu/libfakeroot/libc.so.6 failed attempt to open /usr/local/lib/libc.so.6 failed attempt to open /usr/lib/x86_64-linux-gnu/fortran/gfortran/libc.so.6 failed attempt to open /usr/lib/x86_64-linux-gnu/openmpi/lib/libc.so.6 failed attempt to open /usr/local/lib/x86_64-linux-gnu/libc.so.6 failed attempt to open /usr/local/lib/x86_64-linux-gnu/libc.so.6 failed attempt to open /usr/lib/x86_64-linux-gnu64/libc.so.6 failed attempt to open /usr/local/lib64/libc.so.6 failed attempt to open /lib64/libc.so.6 failed attempt to open /usr/lib64/libc.so.6 failed attempt to open /usr/local/lib/libc.so.6 failed attempt to open /lib/libc.so.6 failed attempt to open /usr/lib/libc.so.6 failed attempt to open /usr/x86_64-linux-gnu/lib64/libc.so.6 failed attempt to open /usr/x86_64-linux-gnu/lib/libc.so.6 failed attempt to open /build/openmpi-RCkqwI/openmpi-4.1.2/debian/build-gfortran/ompi/mpi/fortran/mpif-h/.libs/libc.so.6 failed attempt to open /build/openmpi-RCkqwI/openmpi-4.1.2/debian/build-gfortran/ompi/.libs/libc.so.6 failed attempt to open /usr/lib/x86_64-linux-gnu/openmpi/lib/libc.so.6 failed attempt to open /usr/lib/x86_64-linux-gnu/libfakeroot/libc.so.6 failed attempt to open /usr/local/lib/libc.so.6 failed found libc.so.6 at /usr/lib/x86_64-linux-gnu/libc.so.6 libopen-pal.so.40 needed by /usr/lib/x86_64-linux-gnu/libmpi_mpifh.so.40 attempt to open /build/openmpi-RCkqwI/openmpi-4.1.2/debian/build-gfortran/ompi/.libs/libopen-pal.so.40 failed attempt to open /build/openmpi-RCkqwI/openmpi-4.1.2/debian/build-gfortran/opal/.libs/libopen-pal.so.40 failed attempt to open /usr/lib/x86_64-linux-gnu/openmpi/lib/libopen-pal.so.40 failed attempt to open /usr/lib/x86_64-linux-gnu/libfakeroot/libopen-pal.so.40 failed attempt to open /usr/local/lib/libopen-pal.so.40 failed found libopen-pal.so.40 at /usr/lib/x86_64-linux-gnu/libopen-pal.so.40 libopen-rte.so.40 needed by /usr/lib/x86_64-linux-gnu/libmpi.so.40 attempt to open /usr/lib/x86_64-linux-gnu/openmpi/lib/libopen-rte.so.40 failed attempt to open /usr/lib/x86_64-linux-gnu/libfakeroot/libopen-rte.so.40 failed attempt to open /usr/local/lib/libopen-rte.so.40 failed found libopen-rte.so.40 at /usr/lib/x86_64-linux-gnu/libopen-rte.so.40 libm.so.6 needed by /usr/lib/x86_64-linux-gnu/libmpi.so.40 attempt to open /usr/lib/x86_64-linux-gnu/openmpi/lib/libm.so.6 failed attempt to open /usr/lib/x86_64-linux-gnu/libfakeroot/libm.so.6 failed attempt to open /usr/local/lib/libm.so.6 failed found libm.so.6 at /usr/lib/x86_64-linux-gnu/libm.so.6 libhwloc.so.15 needed by /usr/lib/x86_64-linux-gnu/libmpi.so.40 attempt to open /usr/lib/x86_64-linux-gnu/openmpi/lib/libhwloc.so.15 failed attempt to open /usr/lib/x86_64-linux-gnu/libfakeroot/libhwloc.so.15 failed attempt to open /usr/local/lib/libhwloc.so.15 failed found libhwloc.so.15 at /usr/lib/x86_64-linux-gnu/libhwloc.so.15 ld-linux-x86-64.so.2 needed by /usr/lib/x86_64-linux-gnu/libc.so.6 attempt to open /usr/lib/x86_64-linux-gnu/libfakeroot/ld-linux-x86-64.so.2 failed attempt to open /usr/local/lib/ld-linux-x86-64.so.2 failed found ld-linux-x86-64.so.2 at /usr/lib/x86_64-linux-gnu/ld-linux-x86-64.so.2 libevent_core-2.1.so.7 needed by /usr/lib/x86_64-linux-gnu/libopen-pal.so.40 attempt to open /usr/lib/x86_64-linux-gnu/libfakeroot/libevent_core-2.1.so.7 failed attempt to open /usr/local/lib/libevent_core-2.1.so.7 failed found libevent_core-2.1.so.7 at /usr/lib/x86_64-linux-gnu/libevent_core-2.1.so.7 libevent_pthreads-2.1.so.7 needed by /usr/lib/x86_64-linux-gnu/libopen-pal.so.40 attempt to open /usr/lib/x86_64-linux-gnu/libfakeroot/libevent_pthreads-2.1.so.7 failed attempt to open /usr/local/lib/libevent_pthreads-2.1.so.7 failed found libevent_pthreads-2.1.so.7 at /usr/lib/x86_64-linux-gnu/libevent_pthreads-2.1.so.7 libz.so.1 needed by /usr/lib/x86_64-linux-gnu/libopen-rte.so.40 attempt to open /usr/lib/x86_64-linux-gnu/openmpi/lib/libz.so.1 failed attempt to open /usr/lib/x86_64-linux-gnu/libfakeroot/libz.so.1 failed attempt to open /usr/local/lib/libz.so.1 failed found libz.so.1 at /usr/lib/x86_64-linux-gnu/libz.so.1 libudev.so.1 needed by /usr/lib/x86_64-linux-gnu/libhwloc.so.15 attempt to open /usr/lib/x86_64-linux-gnu/libfakeroot/libudev.so.1 failed attempt to open /usr/local/lib/libudev.so.1 failed found libudev.so.1 at /usr/lib/x86_64-linux-gnu/libudev.so.1 ld -lmpi_usempif08 --verbose | grep found found libmpi_mpifh.so.40 at /usr/lib/x86_64-linux-gnu/libmpi_mpifh.so.40 found libmpi.so.40 at /usr/lib/x86_64-linux-gnu/libmpi.so.40 ld: warning: cannot find entry symbol _start; not setting start address found libc.so.6 at /usr/lib/x86_64-linux-gnu/libc.so.6 found libopen-pal.so.40 at /usr/lib/x86_64-linux-gnu/libopen-pal.so.40 found libopen-rte.so.40 at /usr/lib/x86_64-linux-gnu/libopen-rte.so.40 found libm.so.6 at /usr/lib/x86_64-linux-gnu/libm.so.6 found libhwloc.so.15 at /usr/lib/x86_64-linux-gnu/libhwloc.so.15 found ld-linux-x86-64.so.2 at /usr/lib/x86_64-linux-gnu/ld-linux-x86-64.so.2 found libevent_core-2.1.so.7 at /usr/lib/x86_64-linux-gnu/libevent_core-2.1.so.7 found libevent_pthreads-2.1.so.7 at /usr/lib/x86_64-linux-gnu/libevent_pthreads-2.1.so.7 found libz.so.1 at /usr/lib/x86_64-linux-gnu/libz.so.1 found libudev.so.1 at /usr/lib/x86_64-linux-gnu/libudev.so.1
Salin selepas log masuk

Maklumat di atas sangat panjang dan mengandungi banyak maklumat berharga Jika anda hanya ingin melihat bahagian utama, maka saya akan mengekalkan kandungan utama dan menghasilkan versi ringkas maklumat keluaran:

.

#ld -lmpi_usempif08 –verbose

GNU ld (GNU Binutils for Ubuntu) 2.38 Supported emulations: elf_x86_64 …… using internal linker script: notice and this notice are preserved.*/ OUTPUT_FORMAT("elf64-x86-64", "elf64-x86-64", "elf64-x86-64") OUTPUT_ARCH(i386:x86-64) ENTRY(_start)# 运行时可执行文件从代码段的 _start 位置开始运行。 # 运行时需从哪些目录找动态库文件 SEARCH_DIR("=/usr/local/lib/x86_64-linux-gnu"); SEARCH_DIR("=/lib/x86_64-linux-gnu"); SEARCH_DIR("=/usr/lib/x86_64-linux-gnu"); SEARCH_DIR("=/usr/lib/x86_64-linux-gnu64"); SEARCH_DIR("=/usr/local/lib64"); SEARCH_DIR("=/lib64"); SEARCH_DIR("=/usr/lib64"); SEARCH_DIR("=/usr/local/lib"); SEARCH_DIR("=/lib"); SEARCH_DIR("=/usr/lib"); SEARCH_DIR("=/usr/x86_64-linux-gnu/lib64"); SEARCH_DIR("=/usr/x86_64-linux-gnu/lib"); # 二进制文件有哪些的代码段、数据段 SECTIONS { PROVIDE (__executable_start = SEGMENT_START("text-segment", 0x400000)); . = SEGMENT_START("text-segment", 0x400000) + SIZEOF_HEADERS; .interp : { *(.interp) } …… .rodata : { *(.rodata .rodata.* .gnu.linkonce.r.*) } …… /* Thread Local Storage sections*/ # 线程本地存储区域 .tdata : { PROVIDE_HIDDEN (__tdata_start = .); *(.tdata .tdata.* .gnu.linkonce.td.*) } .tbss: { *(.tbss .tbss.* .gnu.linkonce.tb.*) *(.tcommon) } .preinit_array: { PROVIDE_HIDDEN (__preinit_array_start = .); KEEP (*(.preinit_array)) PROVIDE_HIDDEN (__preinit_array_end = .); } # 数据区 .data : { *(.data .data.* .gnu.linkonce.d.*) SORT(CONSTRUCTORS) } .data1: { *(.data1) } _edata = .; PROVIDE (edata = .); . = .; __bss_start = .; # BSS区 .bss: { …… } …… } # 下面是本文的重点关注部分 ================================================== # 文件1:逐个目录匹配是否找到被依赖的libmpi_usempif08.so 库文件 ld: mode elf_x86_64 attempt to open /usr/local/lib/x86_64-linux-gnu/libmpi_usempif08.so failed attempt to open /usr/local/lib/x86_64-linux-gnu/libmpi_usempif08.a failed attempt to open /lib/x86_64-linux-gnu/libmpi_usempif08.so succeeded # 找到了 libmpi_usempif08.so 库文件 # 文件2:逐个目录匹配是否找到被依赖的 libmpi_mpifh.so 库文件 libmpi_mpifh.so.40 needed by /lib/x86_64-linux-gnu/libmpi_usempif08.so attempt to open /build/openmpi-RCkqwI/openmpi-4.1.2/debian/build-gfortran/ompi/mpi/fortran/mpif-h/.libs/libmpi_mpifh.so.40 failed attempt to open /build/openmpi-RCkqwI/openmpi-4.1.2/debian/build-gfortran/ompi/.libs/libmpi_mpifh.so.40 failed attempt to open /usr/lib/x86_64-linux-gnu/openmpi/lib/libmpi_mpifh.so.40 failed attempt to open /usr/lib/x86_64-linux-gnu/libfakeroot/libmpi_mpifh.so.40 failed attempt to open /usr/local/lib/libmpi_mpifh.so.40 failed found libmpi_mpifh.so.40 at /usr/lib/x86_64-linux-gnu/libmpi_mpifh.so.40 # 找到了 libmpi_mpifh.so 库文件 # 找 libmpi.so.40 libmpi.so.40 needed by /lib/x86_64-linux-gnu/libmpi_usempif08.so …… found libmpi.so.40 at /usr/lib/x86_64-linux-gnu/libmpi.so.40 # 找 libc.so.6 libc.so.6 needed by /lib/x86_64-linux-gnu/libmpi_usempif08.so …… found libc.so.6 at /usr/lib/x86_64-linux-gnu/libc.so.6 # 找 libopen-pal.so.40 libopen-pal.so.40 needed by /usr/lib/x86_64-linux-gnu/libmpi_mpifh.so.40 …… found libopen-pal.so.40 at /usr/lib/x86_64-linux-gnu/libopen-pal.so.40 # 找 libopen-rte.so.40 libopen-rte.so.40 needed by /usr/lib/x86_64-linux-gnu/libmpi.so.40 …… found libopen-rte.so.40 at /usr/lib/x86_64-linux-gnu/libopen-rte.so.40 # 找 libm.so.6 libm.so.6 needed by /usr/lib/x86_64-linux-gnu/libmpi.so.40 …… found libm.so.6 at /usr/lib/x86_64-linux-gnu/libm.so.6 libhwloc.so.15 needed by /usr/lib/x86_64-linux-gnu/libmpi.so.40 # 找 libhwloc.so.15 ……略 # 找 libudev.so.1 libudev.so.1 needed by /usr/lib/x86_64-linux-gnu/libhwloc.so.15 attempt to open /usr/lib/x86_64-linux-gnu/libfakeroot/libudev.so.1 failed attempt to open /usr/local/lib/libudev.so.1 failed found libudev.so.1 at /usr/lib/x86_64-linux-gnu/libudev.so.1
Salin selepas log masuk

Selanjutnya, kita boleh menggunakan grep untuk menapis untuk hanya memaparkan maklumat tentang perpustakaan yang sebenarnya ditemui oleh mpi_usempif08:

#ld -lmpi_usempif08 –verbose |

found libmpi_mpifh.so.40 at /usr/lib/x86_64-linux-gnu/libmpi_mpifh.so.40 found libmpi.so.40 at /usr/lib/x86_64-linux-gnu/libmpi.so.40 ld: warning: cannot find entry symbol _start; not setting start address found libc.so.6 at /usr/lib/x86_64-linux-gnu/libc.so.6 found libopen-pal.so.40 at /usr/lib/x86_64-linux-gnu/libopen-pal.so.40 found libopen-rte.so.40 at /usr/lib/x86_64-linux-gnu/libopen-rte.so.40 found libm.so.6 at /usr/lib/x86_64-linux-gnu/libm.so.6 found libhwloc.so.15 at /usr/lib/x86_64-linux-gnu/libhwloc.so.15 found ld-linux-x86-64.so.2 at /usr/lib/x86_64-linux-gnu/ld-linux-x86-64.so.2 found libevent_core-2.1.so.7 at /usr/lib/x86_64-linux-gnu/libevent_core-2.1.so.7 found libevent_pthreads-2.1.so.7 at /usr/lib/x86_64-linux-gnu/libevent_pthreads-2.1.so.7 found libz.so.1 at /usr/lib/x86_64-linux-gnu/libz.so.1 found libudev.so.1 at /usr/lib/x86_64-linux-gnu/libudev.so.1
Salin selepas log masuk

Dan ldd berbeza dengan ld. ldd menganalisis kebergantungan perpustakaan masa jalan Linux, dan ld ialah pemaut fail boleh laku yang sering digunakan dalam fasa pemautan menjana fail boleh laku daripada C/C++/Fortran dan kod bahasa lain.

Mari kita lihat menggunakan ldd untuk menganalisis perpustakaan lain yang bergantung kepada perpustakaan dinamik yang sama:

#ldd/usr/lib/x86_64-linux-gnu/libmpi_usempif08.so.40.30.0

linux-vdso.so.1 (0x00007ffd2f3fd000) libmpi_mpifh.so.40 => /usr/lib/x86_64-linux-gnu/libmpi_mpifh.so.40 (0x00007f34366bf000) libmpi.so.40 => /usr/lib/x86_64-linux-gnu/libmpi.so.40 (0x00007f3436588000) libc.so.6 => /usr/lib/x86_64-linux-gnu/libc.so.6 (0x00007f3436200000) libopen-pal.so.40 => /usr/lib/x86_64-linux-gnu/libopen-pal.so.40 (0x00007f34364d5000) libopen-rte.so.40 => /usr/lib/x86_64-linux-gnu/libopen-rte.so.40 (0x00007f3436143000) libm.so.6 => /usr/lib/x86_64-linux-gnu/libm.so.6 (0x00007f343605c000) libhwloc.so.15 => /usr/lib/x86_64-linux-gnu/libhwloc.so.15 (0x00007f3436477000) /lib64/ld-linux-x86-64.so.2 (0x00007f343677c000) libevent_core-2.1.so.7 => /usr/lib/x86_64-linux-gnu/libevent_core-2.1.so.7 (0x00007f3436442000) libevent_pthreads-2.1.so.7 => /usr/lib/x86_64-linux-gnu/libevent_pthreads-2.1.so.7 (0x00007f343643d000) libz.so.1 => /usr/lib/x86_64-linux-gnu/libz.so.1 (0x00007f3436040000) libudev.so.1 => /usr/lib/x86_64-linux-gnu/libudev.so.1 (0x00007f3436016000)
Salin selepas log masuk
Tempahan di sini adalah konsisten dengan hasil ld -lmpi_usempif08 –verbose |

Atas ialah kandungan terperinci Pengetahuan yang dipertingkatkan menggunakan ld dan ldd Linux bersama-sama boleh membantu kami menganalisis sebab kegagalan memuatkan fail perpustakaan pada masa jalan.. Untuk maklumat lanjut, sila ikut artikel berkaitan lain di laman web China PHP!

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