library dep

linux

使用 ldd 查看程序依赖的动态库

$ ldd /usr/bin/bash
	linux-vdso.so.1 (0x00007ffdd2749000)
	libtinfo.so.6 => /lib/x86_64-linux-gnu/libtinfo.so.6 (0x00007fcecb9b6100)
	libdl.so.2 => /lib/x86_64-linux-gnu/libdl.so.2 (0x00007fcecb9b0000)
	libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007fcecb7c5000)
	/lib64/ld-linux-x86-64.so.2 (0x00007fcecbb21000)

verbose 模式

$ ldd --verbose /usr/bin/bash
	linux-vdso.so.1 (0x00007ffce299c000)
	libtinfo.so.6 => /lib/x86_64-linux-gnu/libtinfo.so.6 (0x00007f6fb24dd000)
	libdl.so.2 => /lib/x86_64-linux-gnu/libdl.so.2 (0x00007f6fb24d6100)
	libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007f6fb22ec000)
	/lib64/ld-linux-x86-64.so.2 (0x00007f6fb2648000)

	Version information:
	/usr/bin/bash:
		libdl.so.2 (GLIBC_2.2.5) => /lib/x86_64-linux-gnu/libdl.so.2
		libtinfo.so.6 (NCURSES6_TINFO_5.0.19991023) => /lib/x86_64-linux-gnu/libtinfo.so.6
		libc.so.6 (GLIBC_2.11) => /lib/x86_64-linux-gnu/libc.so.6
		libc.so.6 (GLIBC_2.14) => /lib/x86_64-linux-gnu/libc.so.6
		libc.so.6 (GLIBC_2.8) => /lib/x86_64-linux-gnu/libc.so.6
		libc.so.6 (GLIBC_2.15) => /lib/x86_64-linux-gnu/libc.so.6
		libc.so.6 (GLIBC_2.4) => /lib/x86_64-linux-gnu/libc.so.6
		libc.so.6 (GLIBC_2.3.4) => /lib/x86_64-linux-gnu/libc.so.6
		libc.so.6 (GLIBC_2.3) => /lib/x86_64-linux-gnu/libc.so.6
		libc.so.6 (GLIBC_2.2.5) => /lib/x86_64-linux-gnu/libc.so.6
	/lib/x86_64-linux-gnu/libtinfo.so.6:
		libc.so.6 (GLIBC_2.3) => /lib/x86_64-linux-gnu/libc.so.6
		libc.so.6 (GLIBC_2.14) => /lib/x86_64-linux-gnu/libc.so.6
		libc.so.6 (GLIBC_2.16) => /lib/x86_64-linux-gnu/libc.so.6
		libc.so.6 (GLIBC_2.4) => /lib/x86_64-linux-gnu/libc.so.6
		libc.so.6 (GLIBC_2.3.4) => /lib/x86_64-linux-gnu/libc.so.6
		libc.so.6 (GLIBC_2.2.5) => /lib/x86_64-linux-gnu/libc.so.6
	/lib/x86_64-linux-gnu/libdl.so.2:
		ld-linux-x86-64.so.2 (GLIBC_PRIVATE) => /lib64/ld-linux-x86-64.so.2
		libc.so.6 (GLIBC_PRIVATE) => /lib/x86_64-linux-gnu/libc.so.6
		libc.so.6 (GLIBC_2.4) => /lib/x86_64-linux-gnu/libc.so.6
		libc.so.6 (GLIBC_2.2.5) => /lib/x86_64-linux-gnu/libc.so.6
	/lib/x86_64-linux-gnu/libc.so.6:
		ld-linux-x86-64.so.2 (GLIBC_2.3) => /lib64/ld-linux-x86-64.so.2
		ld-linux-x86-64.so.2 (GLIBC_PRIVATE) => /lib64/ld-linux-x86-64.so.2

Find dynamic library required by program using readelf.

$ readelf --dynamic /usr/bin/bash | grep NEEDED
 0x0000000000000001 (NEEDED)             Shared library: [libtinfo.so.6]
 0x0000000000000001 (NEEDED)             Shared library: [libdl.so.2]
 0x0000000000000001 (NEEDED)             Shared library: [libc.so.6]

$ readelf -d a.out | grep NEEDED

 0x0000000000000001 (NEEDED)             Shared library: [librt.so.1]
 0x0000000000000001 (NEEDED)             Shared library: [libc.so.6]

read library requirement of running processes from /proc//maps.

 $ awk '/.so/{print $6}'  /proc/$(pgrep bash | head -n1)/maps | sort -u
/usr/lib/x86_64-linux-gnu/ld-2.29.so
/usr/lib/x86_64-linux-gnu/libc-2.29.so
/usr/lib/x86_64-linux-gnu/libdl-2.29.so
/usr/lib/x86_64-linux-gnu/libnss_files-2.29.so
/usr/lib/x86_64-linux-gnu/libtinfo.so.6.1

View shared library requirement of a running process using lsof

$ lsof -p $(pgrep bash | head -n1) | grep mem
bash    4470 user  mem    REG    8,1    51672 404577 /usr/lib/x86_64-linux-gnu/libnss_files-2.29.so
bash    4470 user  mem    REG    8,1 14529344 401393 /usr/lib/locale/locale-archive
bash    4470 user  mem    REG    8,1  2000480 403822 /usr/lib/x86_64-linux-gnu/libc-2.29.so
bash    4470 user  mem    REG    8,1    18656 403961 /usr/lib/x86_64-linux-gnu/libdl-2.29.so
bash    4470 user  mem    REG    8,1   183528 404929 /usr/lib/x86_64-linux-gnu/libtinfo.so.6.1
bash    4470 user  mem    REG    8,1    26402 789841 /usr/lib/x86_64-linux-gnu/gconv/gconv-modules.cache
bash    4470 user  mem    REG    8,1   179032 403610 /usr/lib/x86_64-linux-gnu/ld-2.29.so

pgrep bash | head -n1 

gets the ID of the first process named bash

Use pmap to gather shared library requirement of a program.

$ pmap $(pgrep bash | head -n1) | grep .so | awk '{ print $4 }' | sort -u
ld-2.29.so
libc-2.29.so
libdl-2.29.so
libnss_files-2.29.so
libtinfo.so.6.1

windows

开源工具Dependencies

https://github.com/lucasg/Dependencies/releases

vs工具

dumpbin from Visual Studio tools (VCin folder) can help here:

dumpbin /dependents your_dll_file.dll

https://stackoverflow.com/questions/7378959/how-to-check-for-dll-dependency
https://www.simplified.guide/linux/show-shared-library-dependency