PLDD(1) Linux User Manual PLDD(1)

pldd - display dynamic shared objects linked into a process

pldd pid
pldd option

The pldd command displays a list of the dynamic shared objects (DSOs) that are linked into the process with the specified process ID (PID). The list includes the libraries that have been dynamically loaded using dlopen(3).

-?, --help
Display a help message and exit.
Display a short usage message and exit.
-V, --version
Display program version information and exit.

On success, pldd exits with the status 0. If the specified process does not exist, the user does not have permission to access its dynamic shared object list, or no command-line arguments are supplied, pldd exists with a status of 1. If given an invalid option, it exits with the status 64.

pldd is available since glibc 2.15.

The pldd command is not specified by POSIX.1. Some other systems have a similar command.

The command

lsof -p PID

also shows output that includes the dynamic shared objects that are linked into a process.
The gdb(1) info shared command also shows the shared libraries being used by a process, so that one can obtain similar output to pldd using a command such as the following (to monitor the process with the specified pid):

$  gdb -ex "set confirm off" -ex "set height 0" -ex "info shared" \
         -ex "quit" -p $pid | grep '^0x.*0x'

From glibc 2.19 to 2.29, pldd was broken: it just hung when executed. This problem was fixed in glibc 2.30, and the fix has been backported to earlier glibc versions in some distributions.

$  echo $$               # Display PID of shell
$  pldd $$               # Display DSOs linked into the shell
1143:   /usr/bin/bash

ldd(1), lsof(1), dlopen(3),
2019-08-02 GNU