327 lines
8.8 KiB
C
327 lines
8.8 KiB
C
/*
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* Copyright 2002 by Albert Cahalan; all rights reserved.
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* This file may be used subject to the terms and conditions of the
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* GNU Library General Public License Version 2, or any later version
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* at your option, as published by the Free Software Foundation.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Library General Public License for more details.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <ctype.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <string.h>
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#include <unistd.h>
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#include <sys/ipc.h>
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#include <sys/shm.h>
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#include "proc/readproc.h"
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#include "proc/version.h"
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#include "proc/escape.h"
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static void usage(void) NORETURN;
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static void usage(void){
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fprintf(stderr,
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"Usage: pmap [-x | -d] [-q] pid...\n"
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"-x show details\n"
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"-d show offset and device number\n"
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"-q quiet; less header/footer info\n"
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"-V show the version number\n"
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);
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exit(1);
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}
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static int V_option;
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static int r_option; // ignored -- for SunOS compatibility
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static int x_option;
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static int d_option;
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static int q_option;
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static unsigned shm_minor = ~0u;
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static void discover_shm_minor(void){
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void *addr;
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int shmid;
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char mapbuf[256];
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if(!freopen("/proc/self/maps", "r", stdin)) return;
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// create
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shmid = shmget(IPC_PRIVATE, 42, IPC_CREAT | 0666);
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if(shmid==-1) return; // failed; oh well
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// attach
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addr = shmat(shmid, NULL, SHM_RDONLY);
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if(addr==(void*)-1) goto out_destroy;
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while(fgets(mapbuf, sizeof mapbuf, stdin)){
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char flags[32];
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char *tmp; // to clean up unprintables
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unsigned KLONG start, end;
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unsigned long long file_offset, inode;
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unsigned dev_major, dev_minor;
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sscanf(mapbuf,"%"KLF"x-%"KLF"x %31s %Lx %x:%x %Lu", &start, &end, flags, &file_offset, &dev_major, &dev_minor, &inode);
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tmp = strchr(mapbuf,'\n');
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if(tmp) *tmp='\0';
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tmp = mapbuf;
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while(*tmp){
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if(!isprint(*tmp)) *tmp='?';
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tmp++;
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}
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if(start > (unsigned long)addr) continue;
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if(dev_major) continue;
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if(flags[3] != 's') continue;
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if(strstr(mapbuf,"/SYSV")){
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shm_minor = dev_minor;
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break;
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}
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}
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if(shmdt(addr)) perror("shmdt");
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out_destroy:
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if(shmctl(shmid, IPC_RMID, NULL)) perror("IPC_RMID");
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return;
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}
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static const char *mapping_name(proc_t *p, unsigned KLONG addr, unsigned KLONG len, const char *mapbuf, unsigned advance, unsigned dev_major, unsigned dev_minor, unsigned long long inode){
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const char *cp;
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if(!dev_major && dev_minor==shm_minor && strstr(mapbuf,"/SYSV")){
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static char shmbuf[64];
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snprintf(shmbuf, sizeof shmbuf, " [ shmid=0x%Lx ]", inode);
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return shmbuf;
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}
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cp = strrchr(mapbuf,'/');
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if(cp){
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if(cp[1]) cp += advance;
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return cp;
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}
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cp = " [ anon ]";
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if( (p->start_stack >= addr) && (p->start_stack <= addr+len) ) cp = " [ stack ]";
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return cp;
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}
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// Overkill, but who knows what is proper? The "w" prog
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// uses the tty width to determine this.
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#define maxcmd 0xfffff
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static int one_proc(proc_t *p){
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char buf[32];
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char mapbuf[9600];
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char cmdbuf[512];
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unsigned long total_shared = 0ul;
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unsigned long total_private_readonly = 0ul;
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unsigned long total_private_writeable = 0ul;
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sprintf(buf,"/proc/%u/maps",p->tgid);
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if(!freopen(buf, "r", stdin)) return 1;
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escape_command(cmdbuf, p, sizeof cmdbuf, maxcmd, ESC_ARGS|ESC_BRACKETS);
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printf("%u: %s\n", p->tgid, cmdbuf);
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if(!q_option && (x_option|d_option)){
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if(x_option){
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if(sizeof(KLONG)==4) printf("Address Kbytes RSS Anon Locked Mode Mapping\n");
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else printf("Address Kbytes RSS Anon Locked Mode Mapping\n");
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}
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if(d_option){
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if(sizeof(KLONG)==4) printf("Address Kbytes Mode Offset Device Mapping\n");
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else printf("Address Kbytes Mode Offset Device Mapping\n");
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}
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}
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while(fgets(mapbuf,sizeof mapbuf,stdin)){
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char flags[32];
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char *tmp; // to clean up unprintables
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unsigned KLONG start, end, diff;
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unsigned long long file_offset, inode;
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unsigned dev_major, dev_minor;
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sscanf(mapbuf,"%"KLF"x-%"KLF"x %31s %Lx %x:%x %Lu", &start, &end, flags, &file_offset, &dev_major, &dev_minor, &inode);
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tmp = strchr(mapbuf,'\n');
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if(tmp) *tmp='\0';
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tmp = mapbuf;
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while(*tmp){
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if(!isprint(*tmp)) *tmp='?';
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tmp++;
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}
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diff = end-start;
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if(flags[3]=='s') total_shared += diff;
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if(flags[3]=='p'){
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flags[3] = '-';
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if(flags[1]=='w') total_private_writeable += diff;
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else total_private_readonly += diff;
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}
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// format used by Solaris 9 and procps-3.2.0+
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// an 'R' if swap not reserved (MAP_NORESERVE, SysV ISM shared mem, etc.)
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flags[4] = '-';
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flags[5] = '\0';
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if(x_option){
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const char *cp = mapping_name(p, start, diff, mapbuf, 1, dev_major, dev_minor, inode);
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printf(
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(sizeof(KLONG)==8)
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? "%016"KLF"x %7lu - - - %s %s\n"
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: "%08lx %7lu - - - %s %s\n",
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start,
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(unsigned long)(diff>>10),
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flags,
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cp
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);
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}
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if(d_option){
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const char *cp = mapping_name(p, start, diff, mapbuf, 1, dev_major, dev_minor, inode);
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printf(
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(sizeof(KLONG)==8)
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? "%016"KLF"x %7lu %s %016Lx %03x:%05x %s\n"
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: "%08lx %7lu %s %016Lx %03x:%05x %s\n",
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start,
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(unsigned long)(diff>>10),
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flags,
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file_offset,
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dev_major, dev_minor,
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cp
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);
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}
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if(!x_option && !d_option){
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const char *cp = mapping_name(p, start, diff, mapbuf, 0, dev_major, dev_minor, inode);
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printf(
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(sizeof(KLONG)==8)
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? "%016"KLF"x %6luK %s %s\n"
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: "%08lx %6luK %s %s\n",
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start,
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(unsigned long)(diff>>10),
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flags,
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cp
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);
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}
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}
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if(!q_option){
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if(x_option){
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if(sizeof(KLONG)==8){
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printf("---------------- ------ ------ ------ ------\n");
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printf(
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"total kB %15ld - - -\n",
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(total_shared + total_private_writeable + total_private_readonly) >> 10
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);
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}else{
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printf("-------- ------- ------- ------- -------\n");
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printf(
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"total kB %7ld - - -\n",
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(total_shared + total_private_writeable + total_private_readonly) >> 10
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);
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}
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}
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if(d_option){
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printf(
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"mapped: %ldK writeable/private: %ldK shared: %ldK\n",
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(total_shared + total_private_writeable + total_private_readonly) >> 10,
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total_private_writeable >> 10,
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total_shared >> 10
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);
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}
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if(!x_option && !d_option){
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if(sizeof(KLONG)==8) printf(" total %16ldK\n", (total_shared + total_private_writeable + total_private_readonly) >> 10);
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else printf(" total %8ldK\n", (total_shared + total_private_writeable + total_private_readonly) >> 10);
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}
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}
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return 0;
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}
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int main(int argc, char *argv[]){
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unsigned *pidlist;
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unsigned count = 0;
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PROCTAB* PT;
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proc_t p;
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int ret = 0;
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if(argc<2) usage();
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pidlist = malloc(sizeof(unsigned)*argc); // a bit more than needed perhaps
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while(*++argv){
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if(!strcmp("--version",*argv)){
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V_option++;
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continue;
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}
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if(**argv=='-'){
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char *walk = *argv;
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if(!walk[1]) usage();
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while(*++walk){
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switch(*walk){
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case 'V':
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V_option++;
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break;
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case 'x':
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x_option++;
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break;
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case 'r':
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r_option++;
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break;
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case 'd':
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d_option++;
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break;
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case 'q':
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q_option++;
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break;
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default:
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usage();
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}
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}
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}else{
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char *walk = *argv;
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char *endp;
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unsigned long pid;
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if(!strncmp("/proc/",walk,6)){
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walk += 6;
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// user allowed to do: pmap /proc/*
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if(*walk<'0' || *walk>'9') continue;
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}
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if(*walk<'0' || *walk>'9') usage();
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pid = strtoul(walk, &endp, 0);
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if(pid<1ul || pid>0x7ffffffful || *endp) usage();
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pidlist[count++] = pid;
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}
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}
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if( (x_option|V_option|r_option|d_option|q_option) >> 1 ) usage(); // dupes
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if(V_option){
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if(count|x_option|r_option|d_option|q_option) usage();
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fprintf(stdout, "pmap (%s)\n", procps_version);
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return 0;
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}
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if(count<1) usage(); // no processes
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if(d_option && x_option) usage();
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discover_shm_minor();
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pidlist[count] = 0; // old libproc interface is zero-terminated
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PT = openproc(PROC_FILLSTAT|PROC_FILLARG|PROC_PID, pidlist);
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while(readproc(PT, &p)){
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ret |= one_proc(&p);
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if(p.cmdline) free((void*)*p.cmdline);
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count--;
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}
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closeproc(PT);
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if(count) ret |= 42; // didn't find all processes asked for
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return ret;
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}
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