0834a6d3b9
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>
112 lines
2.5 KiB
C
112 lines
2.5 KiB
C
/*
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* pmap implementation for busybox
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*
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* Copyright (C) 2010 Nokia Corporation. All rights reserved.
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* Written by Alexander Shishkin <virtuoso@slind.org>
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*
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* Licensed under GPLv2 or later, see the LICENSE file in this source tree
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* for details.
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*/
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//applet:IF_PMAP(APPLET(pmap, _BB_DIR_USR_BIN, _BB_SUID_DROP))
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//kbuild:lib-$(CONFIG_PMAP) += pmap.o
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//config:config PMAP
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//config: bool "pmap"
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//config: default y
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//config: help
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//config: Display processes' memory mappings.
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//usage:#define pmap_trivial_usage
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//usage: "[-x][-q] PID"
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//usage:#define pmap_full_usage "\n\n"
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//usage: "Display detailed precesses' memory usage\n"
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//usage: "\nOptions:"
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//usage: "\n -x show details"
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//usage: "\n -q quiet"
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#include "libbb.h"
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#if ULONG_MAX == 0xffffffff
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# define TABS "\t"
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# define AFMT "8"
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# define DASHES ""
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#else
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# define TABS "\t\t"
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# define AFMT "16"
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# define DASHES "--------"
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#endif
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enum {
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OPT_x = 1 << 0,
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OPT_q = 1 << 1,
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};
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static void print_smaprec(struct smaprec *currec, void *data)
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{
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unsigned opt = (unsigned)data;
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printf("%0" AFMT "lx ", currec->smap_start);
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if (opt & OPT_x)
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printf("%7lu %7lu %7lu %7lu ",
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currec->smap_size,
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currec->smap_pss,
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currec->private_dirty,
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currec->smap_swap);
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else
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printf("%7luK", currec->smap_size);
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printf(" %.4s %s\n", currec->smap_mode, currec->smap_name);
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}
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static int procps_get_maps(pid_t pid, unsigned opt)
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{
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struct smaprec total;
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int ret;
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char buf[256];
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read_cmdline(buf, sizeof(buf), pid, "no such process");
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printf("%u: %s\n", (int)pid, buf);
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if (!(opt & OPT_q) && (opt & OPT_x))
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puts("Address" TABS " Kbytes PSS Dirty Swap Mode Mapping");
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memset(&total, 0, sizeof(total));
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ret = procps_read_smaps(pid, &total, print_smaprec, (void*)opt);
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if (ret)
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return ret;
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if (!(opt & OPT_q)) {
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if (opt & OPT_x)
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printf("--------" DASHES " ------ ------ ------ ------\n"
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"total" TABS " %7lu %7lu %7lu %7lu\n",
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total.smap_size, total.smap_pss, total.private_dirty, total.smap_swap);
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else
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printf("mapped: %luK\n", total.smap_size);
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}
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return 0;
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}
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int pmap_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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int pmap_main(int argc UNUSED_PARAM, char **argv)
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{
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unsigned opts;
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int ret;
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opts = getopt32(argv, "xq");
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argv += optind;
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ret = 0;
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while (*argv) {
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pid_t pid = xatoi_positive(*argv++);
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/* GNU pmap returns 42 if any of the pids failed */
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if (procps_get_maps(pid, opts) != 0)
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ret = 42;
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}
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return ret;
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}
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