This tutorial explains Linux “pmap” command, options and its usage with examples.
pmap – report memory map of a process
Description :
The pmap command reports the memory map of a process or processes.
Usage :
pmap [ -x | -d ] [ -q ] pids…
pmap -V
Options :
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-x
Show the extended format.
-d
Show the device format.
-q
Do not display some header/footer lines.
-V
Displays version of program.
Examples :
1. View the memory map of a process
$ pmap 3244 3244: man pmap 00314000 108K r-x-- /lib/ld-2.10.1.so 0032f000 4K r---- /lib/ld-2.10.1.so 00330000 4K rw--- /lib/ld-2.10.1.so 0035a000 20K r-x-- /usr/lib/libgdbm.so.3.0.0 0035f000 4K r---- /usr/lib/libgdbm.so.3.0.0 00360000 4K rw--- /usr/lib/libgdbm.so.3.0.0 00bf5000 4K r-x-- [ anon ] 00c83000 1272K r-x-- /lib/tls/i686/cmov/libc-2.10.1.so 00dc1000 4K ----- /lib/tls/i686/cmov/libc-2.10.1.so 00dc2000 8K r---- /lib/tls/i686/cmov/libc-2.10.1.so 00dc4000 4K rw--- /lib/tls/i686/cmov/libc-2.10.1.so 00dc5000 12K rw--- [ anon ] 00e62000 80K r-x-- /lib/libz.so.1.2.3.3 00e76000 4K r---- /lib/libz.so.1.2.3.3 00e77000 4K rw--- /lib/libz.so.1.2.3.3 08048000 164K r-x-- /usr/bin/man 08071000 4K r---- /usr/bin/man 08072000 4K rw--- /usr/bin/man 08073000 4K rw--- [ anon ] 09b3a000 380K rw--- [ anon ] b78de000 8K rw--- [ anon ] b78f3000 8K rw--- [ anon ] bf8c0000 84K rw--- [ stack ] total 2192K
2. View memory map of multiple processes
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$ pmap 13327 13353 13360
3. Extended Format Display using -x option
$ pmap 18282 18282: man pmap 00007f3229279000 7044K r---- /usr/lib/locale/locale-archive 00007f322995a000 88K r-x-- /lib/x86_64-linux-gnu/libz.so.1.2.7 00007f3229970000 2044K ----- /lib/x86_64-linux-gnu/libz.so.1.2.7 00007f3229b6f000 4K r---- /lib/x86_64-linux-gnu/libz.so.1.2.7 00007f3229b70000 4K rw--- /lib/x86_64-linux-gnu/libz.so.1.2.7 00007f3229b71000 20K r-x-- /usr/lib/x86_64-linux-gnu/libgdbm.so.3.0.0 00007f3229b76000 2044K ----- /usr/lib/x86_64-linux-gnu/libgdbm.so.3.0.0 00007f3229d75000 4K r---- /usr/lib/x86_64-linux-gnu/libgdbm.so.3.0.0 00007f3229d76000 4K rw--- /usr/lib/x86_64-linux-gnu/libgdbm.so.3.0.0 00007f3229d77000 1784K r-x-- /lib/x86_64-linux-gnu/libc-2.17.so 00007f3229f35000 2044K ----- /lib/x86_64-linux-gnu/libc-2.17.so 00007f322a134000 16K r---- /lib/x86_64-linux-gnu/libc-2.17.so 00007f322a138000 8K rw--- /lib/x86_64-linux-gnu/libc-2.17.so 00007f322a13a000 20K rw--- [ anon ] 00007f322a13f000 48K r-x-- /usr/lib/x86_64-linux-gnu/libpipeline.so.1.2.2 00007f322a14b000 2044K ----- /usr/lib/x86_64-linux-gnu/libpipeline.so.1.2.2 00007f322a34a000 4K r---- /usr/lib/x86_64-linux-gnu/libpipeline.so.1.2.2 00007f322a34b000 4K rw--- /usr/lib/x86_64-linux-gnu/libpipeline.so.1.2.2 00007f322a34c000 116K r-x-- /usr/lib/man-db/libman-2.6.3.so 00007f322a369000 2044K ----- /usr/lib/man-db/libman-2.6.3.so 00007f322a568000 4K r---- /usr/lib/man-db/libman-2.6.3.so 00007f322a569000 4K rw--- /usr/lib/man-db/libman-2.6.3.so 00007f322a56a000 4K rw--- [ anon ] 00007f322a56b000 20K r-x-- /usr/lib/man-db/libmandb-2.6.3.so 00007f322a570000 2044K ----- /usr/lib/man-db/libmandb-2.6.3.so 00007f322a76f000 4K r---- /usr/lib/man-db/libmandb-2.6.3.so 00007f322a770000 4K rw--- /usr/lib/man-db/libmandb-2.6.3.so 00007f322a771000 140K r-x-- /lib/x86_64-linux-gnu/ld-2.17.so 00007f322a97a000 20K rw--- [ anon ] 00007f322a98a000 28K r--s- /usr/lib/x86_64-linux-gnu/gconv/gconv-modules.cache 00007f322a991000 8K rw--- [ anon ] 00007f322a993000 4K r---- /lib/x86_64-linux-gnu/ld-2.17.so 00007f322a994000 8K rw--- /lib/x86_64-linux-gnu/ld-2.17.so 00007f322a996000 96K r-x-- /usr/bin/man 00007f322abae000 4K r---- /usr/bin/man 00007f322abaf000 4K rw--- /usr/bin/man 00007f322abb0000 4K rw--- [ anon ] 00007f322b356000 396K rw--- [ anon ] 00007fff237e1000 132K rw--- [ stack ] 00007fff23861000 8K r-x-- [ anon ] ffffffffff600000 4K r-x-- [ anon ] total 22328K $ pmap -x 18282 18282: man pmap Address Kbytes RSS Dirty Mode Mapping 00007f3229279000 7044 56 0 r---- locale-archive 00007f322995a000 88 8 0 r-x-- libz.so.1.2.7 00007f3229970000 2044 0 0 ----- libz.so.1.2.7 00007f3229b6f000 4 4 4 r---- libz.so.1.2.7 00007f3229b70000 4 4 4 rw--- libz.so.1.2.7 00007f3229b71000 20 16 0 r-x-- libgdbm.so.3.0.0 00007f3229b76000 2044 0 0 ----- libgdbm.so.3.0.0 00007f3229d75000 4 4 4 r---- libgdbm.so.3.0.0 00007f3229d76000 4 4 4 rw--- libgdbm.so.3.0.0 00007f3229d77000 1784 640 0 r-x-- libc-2.17.so 00007f3229f35000 2044 0 0 ----- libc-2.17.so 00007f322a134000 16 16 16 r---- libc-2.17.so 00007f322a138000 8 8 8 rw--- libc-2.17.so 00007f322a13a000 20 12 12 rw--- [ anon ] 00007f322a13f000 48 36 0 r-x-- libpipeline.so.1.2.2 00007f322a14b000 2044 0 0 ----- libpipeline.so.1.2.2 00007f322a34a000 4 4 4 r---- libpipeline.so.1.2.2 00007f322a34b000 4 4 4 rw--- libpipeline.so.1.2.2 00007f322a34c000 116 76 0 r-x-- libman-2.6.3.so 00007f322a369000 2044 0 0 ----- libman-2.6.3.so 00007f322a568000 4 4 4 r---- libman-2.6.3.so 00007f322a569000 4 4 4 rw--- libman-2.6.3.so 00007f322a56a000 4 4 4 rw--- [ anon ] 00007f322a56b000 20 16 0 r-x-- libmandb-2.6.3.so 00007f322a570000 2044 0 0 ----- libmandb-2.6.3.so 00007f322a76f000 4 4 4 r---- libmandb-2.6.3.so 00007f322a770000 4 4 4 rw--- libmandb-2.6.3.so 00007f322a771000 140 116 0 r-x-- ld-2.17.so 00007f322a97a000 20 20 20 rw--- [ anon ] 00007f322a98a000 28 24 0 r--s- gconv-modules.cache 00007f322a991000 8 8 8 rw--- [ anon ] 00007f322a993000 4 4 4 r---- ld-2.17.so 00007f322a994000 8 8 8 rw--- ld-2.17.so 00007f322a996000 96 80 0 r-x-- man 00007f322abae000 4 4 4 r---- man 00007f322abaf000 4 4 4 rw--- man 00007f322abb0000 4 4 4 rw--- [ anon ] 00007f322b356000 396 320 320 rw--- [ anon ] 00007fff237e1000 132 20 20 rw--- [ stack ] 00007fff23861000 8 4 0 r-x-- [ anon ] ffffffffff600000 4 0 0 r-x-- [ anon ] ---------------- ------ ------ ------ total kB 22356 1544 472
4. Display in Device Format
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$ pmap -d 18282 18282: man pmap Address Kbytes Mode Offset Device Mapping 00007f3229279000 7044 r---- 0000000000000000 008:00001 locale-archive 00007f322995a000 88 r-x-- 0000000000000000 008:00001 libz.so.1.2.7 00007f3229970000 2044 ----- 0000000000016000 008:00001 libz.so.1.2.7 00007f3229b6f000 4 r---- 0000000000015000 008:00001 libz.so.1.2.7 00007f3229b70000 4 rw--- 0000000000016000 008:00001 libz.so.1.2.7 00007f3229b71000 20 r-x-- 0000000000000000 008:00001 libgdbm.so.3.0.0 00007f3229b76000 2044 ----- 0000000000005000 008:00001 libgdbm.so.3.0.0 00007f3229d75000 4 r---- 0000000000004000 008:00001 libgdbm.so.3.0.0 00007f3229d76000 4 rw--- 0000000000005000 008:00001 libgdbm.so.3.0.0 00007f3229d77000 1784 r-x-- 0000000000000000 008:00001 libc-2.17.so 00007f3229f35000 2044 ----- 00000000001be000 008:00001 libc-2.17.so 00007f322a134000 16 r---- 00000000001bd000 008:00001 libc-2.17.so 00007f322a138000 8 rw--- 00000000001c1000 008:00001 libc-2.17.so 00007f322a13a000 20 rw--- 0000000000000000 000:00000 [ anon ] 00007f322a13f000 48 r-x-- 0000000000000000 008:00001 libpipeline.so.1.2.2 00007f322a14b000 2044 ----- 000000000000c000 008:00001 libpipeline.so.1.2.2 00007f322a34a000 4 r---- 000000000000b000 008:00001 libpipeline.so.1.2.2 00007f322a34b000 4 rw--- 000000000000c000 008:00001 libpipeline.so.1.2.2 00007f322a34c000 116 r-x-- 0000000000000000 008:00001 libman-2.6.3.so 00007f322a369000 2044 ----- 000000000001d000 008:00001 libman-2.6.3.so 00007f322a568000 4 r---- 000000000001c000 008:00001 libman-2.6.3.so 00007f322a569000 4 rw--- 000000000001d000 008:00001 libman-2.6.3.so 00007f322a56a000 4 rw--- 0000000000000000 000:00000 [ anon ] 00007f322a56b000 20 r-x-- 0000000000000000 008:00001 libmandb-2.6.3.so 00007f322a570000 2044 ----- 0000000000005000 008:00001 libmandb-2.6.3.so 00007f322a76f000 4 r---- 0000000000004000 008:00001 libmandb-2.6.3.so 00007f322a770000 4 rw--- 0000000000005000 008:00001 libmandb-2.6.3.so 00007f322a771000 140 r-x-- 0000000000000000 008:00001 ld-2.17.so 00007f322a97a000 20 rw--- 0000000000000000 000:00000 [ anon ] 00007f322a98a000 28 r--s- 0000000000000000 008:00001 gconv-modules.cache 00007f322a991000 8 rw--- 0000000000000000 000:00000 [ anon ] 00007f322a993000 4 r---- 0000000000022000 008:00001 ld-2.17.so 00007f322a994000 8 rw--- 0000000000023000 008:00001 ld-2.17.so 00007f322a996000 96 r-x-- 0000000000000000 008:00001 man 00007f322abae000 4 r---- 0000000000018000 008:00001 man 00007f322abaf000 4 rw--- 0000000000019000 008:00001 man 00007f322abb0000 4 rw--- 0000000000000000 000:00000 [ anon ] 00007f322b356000 396 rw--- 0000000000000000 000:00000 [ anon ] 00007fff237e1000 132 rw--- 0000000000000000 000:00000 [ stack ] 00007fff23861000 8 r-x-- 0000000000000000 000:00000 [ anon ] ffffffffff600000 4 r-x-- 0000000000000000 000:00000 [ anon ] mapped: 22328K writeable/private: 624K shared: 28K
5. Don’t show headers and footers in output
$ pmap -q 18282 18282: man pmap 00007f3229279000 7044K r---- /usr/lib/locale/locale-archive 00007f322995a000 88K r-x-- /lib/x86_64-linux-gnu/libz.so.1.2.7 00007f3229970000 2044K ----- /lib/x86_64-linux-gnu/libz.so.1.2.7 00007f3229b6f000 4K r---- /lib/x86_64-linux-gnu/libz.so.1.2.7 00007f3229b70000 4K rw--- /lib/x86_64-linux-gnu/libz.so.1.2.7 00007f3229b71000 20K r-x-- /usr/lib/x86_64-linux-gnu/libgdbm.so.3.0.0 00007f3229b76000 2044K ----- /usr/lib/x86_64-linux-gnu/libgdbm.so.3.0.0 00007f3229d75000 4K r---- /usr/lib/x86_64-linux-gnu/libgdbm.so.3.0.0 00007f3229d76000 4K rw--- /usr/lib/x86_64-linux-gnu/libgdbm.so.3.0.0 00007f3229d77000 1784K r-x-- /lib/x86_64-linux-gnu/libc-2.17.so 00007f3229f35000 2044K ----- /lib/x86_64-linux-gnu/libc-2.17.so 00007f322a134000 16K r---- /lib/x86_64-linux-gnu/libc-2.17.so 00007f322a138000 8K rw--- /lib/x86_64-linux-gnu/libc-2.17.so 00007f322a13a000 20K rw--- [ anon ] 00007f322a13f000 48K r-x-- /usr/lib/x86_64-linux-gnu/libpipeline.so.1.2.2 00007f322a14b000 2044K ----- /usr/lib/x86_64-linux-gnu/libpipeline.so.1.2.2 00007f322a34a000 4K r---- /usr/lib/x86_64-linux-gnu/libpipeline.so.1.2.2 00007f322a34b000 4K rw--- /usr/lib/x86_64-linux-gnu/libpipeline.so.1.2.2 00007f322a34c000 116K r-x-- /usr/lib/man-db/libman-2.6.3.so 00007f322a369000 2044K ----- /usr/lib/man-db/libman-2.6.3.so 00007f322a568000 4K r---- /usr/lib/man-db/libman-2.6.3.so 00007f322a569000 4K rw--- /usr/lib/man-db/libman-2.6.3.so 00007f322a56a000 4K rw--- [ anon ] 00007f322a56b000 20K r-x-- /usr/lib/man-db/libmandb-2.6.3.so 00007f322a570000 2044K ----- /usr/lib/man-db/libmandb-2.6.3.so 00007f322a76f000 4K r---- /usr/lib/man-db/libmandb-2.6.3.so 00007f322a770000 4K rw--- /usr/lib/man-db/libmandb-2.6.3.so 00007f322a771000 140K r-x-- /lib/x86_64-linux-gnu/ld-2.17.so 00007f322a97a000 20K rw--- [ anon ] 00007f322a98a000 28K r--s- /usr/lib/x86_64-linux-gnu/gconv/gconv-modules.cache 00007f322a991000 8K rw--- [ anon ] 00007f322a993000 4K r---- /lib/x86_64-linux-gnu/ld-2.17.so 00007f322a994000 8K rw--- /lib/x86_64-linux-gnu/ld-2.17.so 00007f322a996000 96K r-x-- /usr/bin/man 00007f322abae000 4K r---- /usr/bin/man 00007f322abaf000 4K rw--- /usr/bin/man 00007f322abb0000 4K rw--- [ anon ] 00007f322b356000 396K rw--- [ anon ] 00007fff237e1000 132K rw--- [ stack ] 00007fff23861000 8K r-x-- [ anon ] ffffffffff600000 4K r-x-- [ anon ]
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