Is there a command like pstree for libraries?
- by flashnode
I need to determine whether a library named libunaSA.so is being called directly by the process or by another library called libtoki2.so. I guess what I'm looking for is a pstree for libraries. The system is running RHEL 5.3 Beta.
This output shows the two libraries in the process map
# grep -e toki -e una /proc/2335/maps
0043f000-004ad000 r-xp 00000000 08:02 543465 /usr/lib/libtoki2.so
004ad000-004c5000 rwxp 0006d000 08:02 543465 /usr/lib/libtoki2.so
01185000-01397000 r-xp 00000000 08:02 543503 /usr/lib/libunaSA.so
01397000-013dc000 rwxp 00211000 08:02 543503 /usr/lib/libunaSA.so
This output shows that only the libtoki2.so library is in the current cache
# ldconfig -p | grep -e una -e toki
libtoki2.so (libc6) => /usr/lib/libtoki2.so
libtoki.so.4.4.1 (libc6) => /usr/lib/libtoki.so.4.4.1
libtoki.so.2 (libc6) => /usr/lib/libtoki.so.2
I attached strace to the running process but it doesn't provide much output
# strace -p 2335
Process 2335 attached - interrupt to quit
futex(0xb7ef5bd8, FUTEX_WAIT, 2336, NULL
Here's the output to ldd for each library
# ldd /usr/lib/libtoki2.so
linux-gate.so.1 => (0x00a0a000)
libdl.so.2 => /lib/libdl.so.2 (0x001bd000)
libstdc++-libc6.2-2.so.3 => /usr/lib/libstdc++-libc6.2-2.so.3 (0x00f3f000)
libm.so.6 => /lib/libm.so.6 (0x00b27000)
libc.so.6 => /lib/libc.so.6 (0x0043d000)
/lib/ld-linux.so.2 (0x00742000)
libgcc_s.so.1 => /lib/libgcc_s.so.1 (0x00110000)
# ldd /usr/lib/libunaSA.so
linux-gate.so.1 => (0x00244000)
libpthread.so.0 => /lib/libpthread.so.0 (0x00baf000)
libdl.so.2 => /lib/libdl.so.2 (0x007fa000)
libstdc++-libc6.2-2.so.3 => /usr/lib/libstdc++-libc6.2-2.so.3 (0x009ce000)
libm.so.6 => /lib/libm.so.6 (0x00c96000)
libc.so.6 => /lib/libc.so.6 (0x004a2000)
/lib/ld-linux.so.2 (0x00742000)
libgcc_s.so.1 => /lib/libgcc_s.so.1 (0x00a9f000)
