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pmap: new applet. +1k.

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pmap is a tool used to look at processes' memory maps, normally found
in procps package. It provides more readable and easily sortable output
(one line per mapping) from  maps/smaps files in /proc/PID/.  This would
help in debugging memory usage issues, especially on devices where lots
of typing is not a viable option.

This patch does'n implement -d and -A command line options of GNU pmap,
since those are not that must have features and I was afraid of going
blind from looking at its code.

The implementation takes smaps scanning part out of procps_scan() function
and moves it into procps_read_smaps(), which does more detailed processing
of a single PID's smaps data.

Signed-off-by: Alexander Shishkin <virtuoso@slind.org>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Alexander Shishkin
2010-08-28 23:20:34 +02:00
committed by Denys Vlasenko
parent 74c992af5c
commit 0834a6d3b9
4 changed files with 251 additions and 67 deletions
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31
include/libbb.h
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@ -1387,6 +1387,29 @@ enum { COMM_LEN = TASK_COMM_LEN };
enum { COMM_LEN = 16 };
# endif
#endif
struct smaprec {
unsigned long mapped_rw;
unsigned long mapped_ro;
unsigned long shared_clean;
unsigned long shared_dirty;
unsigned long private_clean;
unsigned long private_dirty;
unsigned long stack;
unsigned long smap_pss, smap_swap;
unsigned long smap_size;
unsigned long smap_start;
char smap_mode[5];
char *smap_name;
};
#if !ENABLE_PMAP
#define procps_read_smaps(pid, total, cb, data) \
procps_read_smaps(pid, total)
#endif
int FAST_FUNC procps_read_smaps(pid_t pid, struct smaprec *total,
void (*cb)(struct smaprec *, void *), void *data);
typedef struct procps_status_t {
DIR *dir;
IF_FEATURE_SHOW_THREADS(DIR *task_dir;)
@ -1415,13 +1438,7 @@ typedef struct procps_status_t {
#endif
unsigned tty_major,tty_minor;
#if ENABLE_FEATURE_TOPMEM
unsigned long mapped_rw;
unsigned long mapped_ro;
unsigned long shared_clean;
unsigned long shared_dirty;
unsigned long private_clean;
unsigned long private_dirty;
unsigned long stack;
struct smaprec smaps;
#endif
char state[4];
/* basename of executable in exec(2), read from /proc/N/stat