483 lines
13 KiB
C
483 lines
13 KiB
C
/*
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* Copyright (C) 2008 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <assert.h>
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#include <dirent.h>
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#include <errno.h>
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#include <getopt.h>
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#include <stdbool.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include <pagemap/pagemap.h>
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#define MAX_CMDLINE 256
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struct process_info {
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pid_t pid;
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char cmdline[MAX_CMDLINE];
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};
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struct mapping_info {
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struct process_info *proc;
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pm_memusage_t usage;
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};
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struct library_info {
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struct library_info *next;
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char *name;
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struct mapping_info **mappings;
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size_t mappings_count;
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size_t mappings_size;
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pm_memusage_t total_usage;
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};
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static void usage(char *myname);
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static int getprocname(pid_t pid, char *buf, size_t len);
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static int numcmp(long long a, long long b);
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static int licmp(const void *a, const void *b);
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char *library_name_blacklist[] = { "[heap]", "[stack]", "", NULL };
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#define declare_sort(field) \
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static int sort_by_ ## field (const void *a, const void *b)
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declare_sort(vss);
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declare_sort(rss);
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declare_sort(pss);
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declare_sort(uss);
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declare_sort(swap);
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#define INIT_LIBRARIES 16
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#define INIT_MAPPINGS 4
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static int order;
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struct library_info **libraries;
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size_t libraries_count;
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size_t libraries_size;
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struct library_info *get_library(const char *name, bool all) {
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size_t i;
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struct library_info *library;
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if (!all) {
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for (i = 0; library_name_blacklist[i]; i++)
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if (!strcmp(name, library_name_blacklist[i]))
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return NULL;
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} else {
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if (name[0] == 0) {
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name = "[anon]";
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}
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}
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for (i = 0; i < libraries_count; i++) {
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if (!strcmp(libraries[i]->name, name))
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return libraries[i];
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}
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if (libraries_count >= libraries_size) {
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libraries = realloc(libraries, 2 * libraries_size * sizeof(struct library_info *));
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if (!libraries) {
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fprintf(stderr, "Couldn't resize libraries array: %s\n", strerror(errno));
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exit(EXIT_FAILURE);
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}
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libraries_size = 2 * libraries_size;
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}
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library = calloc(1, sizeof(*library));
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if (!library) {
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fprintf(stderr, "Couldn't allocate space for library struct: %s\n", strerror(errno));
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exit(EXIT_FAILURE);
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}
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library->name = malloc(strlen(name) + 1);
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if (!library->name) {
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fprintf(stderr, "Couldn't allocate space for library name: %s\n", strerror(errno));
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exit(EXIT_FAILURE);
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}
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strcpy(library->name, name);
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library->mappings = malloc(INIT_MAPPINGS * sizeof(struct mapping_info *));
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if (!library->mappings) {
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fprintf(stderr, "Couldn't allocate space for library mappings array: %s\n", strerror(errno));
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exit(EXIT_FAILURE);
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}
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library->mappings_count = 0; library->mappings_size = INIT_MAPPINGS;
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pm_memusage_zero(&library->total_usage);
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libraries[libraries_count++] = library;
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return library;
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}
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struct mapping_info *get_mapping(struct library_info *library, struct process_info *proc) {
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struct mapping_info *mapping;
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size_t i;
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for (i = 0; i < library->mappings_count; i++) {
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if (library->mappings[i]->proc == proc)
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return library->mappings[i];
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}
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if (library->mappings_count >= library->mappings_size) {
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library->mappings = realloc(library->mappings,
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2 * library->mappings_size * sizeof(struct mapping*));
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if (!library->mappings) {
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fprintf(stderr, "Couldn't resize mappings array: %s\n", strerror(errno));
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exit(EXIT_FAILURE);
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}
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library->mappings_size = 2 * library->mappings_size;
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}
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mapping = calloc(1, sizeof(*mapping));
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if (!mapping) {
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fprintf(stderr, "Couldn't allocate space for mapping struct: %s\n", strerror(errno));
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exit(EXIT_FAILURE);
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}
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mapping->proc = proc;
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pm_memusage_zero(&mapping->usage);
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library->mappings[library->mappings_count++] = mapping;
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return mapping;
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}
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struct process_info *get_process(pid_t pid) {
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struct process_info *process;
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process = calloc(1, sizeof(*process));
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if (!process) {
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fprintf(stderr, "Couldn't allocate space for process struct: %s\n", strerror(errno));
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exit(EXIT_FAILURE);
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}
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process->pid = pid;
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getprocname(pid, process->cmdline, sizeof(process->cmdline));
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return process;
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}
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static int parse_perm(const char *perm)
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{
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int ret = 0;
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while (*perm) {
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switch(*perm) {
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case 'r':
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ret |= PM_MAP_READ;
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break;
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case 'w':
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ret |= PM_MAP_WRITE;
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break;
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case 'x':
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ret |= PM_MAP_EXEC;
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break;
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default:
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fprintf(stderr, "Unknown permission '%c'\n", *perm);
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exit(EXIT_FAILURE);
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}
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perm++;
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}
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return ret;
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}
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int main(int argc, char *argv[]) {
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char cmdline[256];
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char *prefix;
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size_t prefix_len;
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int (*compfn)(const void *a, const void *b);
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pm_kernel_t *ker;
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pm_process_t *proc;
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pid_t *pids;
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size_t num_procs;
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pm_map_t **maps;
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size_t num_maps;
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pm_memusage_t map_usage;
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struct library_info *li, **lis;
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struct mapping_info *mi, **mis;
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struct process_info *pi;
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size_t i, j;
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int error;
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int perm;
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bool all;
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uint64_t required_flags;
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uint64_t flags_mask;
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bool has_swap = false;
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signal(SIGPIPE, SIG_IGN);
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compfn = &sort_by_pss;
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order = -1;
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prefix = NULL;
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prefix_len = 0;
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opterr = 0;
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perm = 0;
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all = false;
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required_flags = 0;
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flags_mask = 0;
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while (1) {
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int c;
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const struct option longopts[] = {
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{"all", 0, 0, 'a'},
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{"cached", 0, 0, 'c'},
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{"nocached", 0, 0, 'C'},
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{"ksm", 0, 0, 'k'},
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{"help", 0, 0, 'h'},
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{"pss", 0, 0, 'p'},
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{"uss", 0, 0, 'u'},
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{"vss", 0, 0, 'v'},
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{"rss", 0, 0, 'r'},
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{"swap", 0, 0, 's'},
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{"reverse", 0, 0, 'R'},
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{"path", required_argument, 0, 'P'},
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{"perm", required_argument, 0, 'm'},
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{0, 0, 0, 0}
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};
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c = getopt_long(argc, argv, "acChkm:pP:uvrsR", longopts, NULL);
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if (c < 0) {
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break;
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}
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/* Alphabetical cases */
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switch (c) {
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case 'a':
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all = true;
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break;
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case 'c':
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required_flags = 0;
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flags_mask = PM_PAGE_SWAPBACKED;
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break;
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case 'C':
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required_flags = PM_PAGE_SWAPBACKED;
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flags_mask = PM_PAGE_SWAPBACKED;
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break;
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case 'k':
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required_flags = PM_PAGE_KSM;
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flags_mask = PM_PAGE_KSM;
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break;
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case 'h':
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usage(argv[0]);
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exit(EXIT_SUCCESS);
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case 'm':
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perm = parse_perm(optarg);
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break;
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case 'p':
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compfn = &sort_by_pss;
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break;
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case 'P':
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prefix = optarg;
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prefix_len = strlen(prefix);
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break;
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case 'u':
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compfn = &sort_by_uss;
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break;
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case 'v':
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compfn = &sort_by_vss;
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break;
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case 'r':
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compfn = &sort_by_rss;
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break;
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case 's':
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compfn = &sort_by_swap;
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break;
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case 'R':
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order *= -1;
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break;
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case '?':
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fprintf(stderr, "Invalid argument \"%s\".\n", argv[optind - 1]);
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usage(argv[0]);
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exit(EXIT_FAILURE);
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default:
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abort();
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}
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}
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argc -= optind;
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argv += optind;
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libraries = malloc(INIT_LIBRARIES * sizeof(struct library_info *));
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libraries_count = 0; libraries_size = INIT_LIBRARIES;
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error = pm_kernel_create(&ker);
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if (error) {
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fprintf(stderr, "Error initializing kernel interface -- "
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"does this kernel have pagemap?\n");
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exit(EXIT_FAILURE);
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}
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error = pm_kernel_pids(ker, &pids, &num_procs);
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if (error) {
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fprintf(stderr, "Error listing processes.\n");
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exit(EXIT_FAILURE);
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}
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for (i = 0; i < num_procs; i++) {
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error = pm_process_create(ker, pids[i], &proc);
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if (error) {
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fprintf(stderr, "warning: could not create process interface for %d\n", pids[i]);
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continue;
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}
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pi = get_process(pids[i]);
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error = pm_process_maps(proc, &maps, &num_maps);
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if (error) {
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fprintf(stderr, "Error listing maps for process %d.\n", proc->pid);
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exit(EXIT_FAILURE);
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}
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for (j = 0; j < num_maps; j++) {
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if (prefix && (strncmp(pm_map_name(maps[j]), prefix, prefix_len)))
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continue;
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if (perm && (pm_map_flags(maps[j]) & PM_MAP_PERMISSIONS) != perm)
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continue;
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li = get_library(pm_map_name(maps[j]), all);
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if (!li)
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continue;
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mi = get_mapping(li, pi);
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error = pm_map_usage_flags(maps[j], &map_usage, flags_mask,
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required_flags);
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if (error) {
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fprintf(stderr, "Error getting map memory usage of "
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"map %s in process %d.\n",
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pm_map_name(maps[j]), proc->pid);
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exit(EXIT_FAILURE);
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}
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if (map_usage.swap) {
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has_swap = true;
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}
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pm_memusage_add(&mi->usage, &map_usage);
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pm_memusage_add(&li->total_usage, &map_usage);
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}
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}
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printf(" %6s %6s %6s %6s %6s ", "RSStot", "VSS", "RSS", "PSS", "USS");
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if (has_swap) {
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printf(" %6s ", "Swap");
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}
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printf("Name/PID\n");
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fflush(stdout);
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qsort(libraries, libraries_count, sizeof(libraries[0]), &licmp);
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for (i = 0; i < libraries_count; i++) {
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li = libraries[i];
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printf("%6zdK %6s %6s %6s %6s ", li->total_usage.pss / 1024, "", "", "", "");
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if (has_swap) {
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printf(" %6s ", "");
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}
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printf("%s\n", li->name);
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fflush(stdout);
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qsort(li->mappings, li->mappings_count, sizeof(li->mappings[0]), compfn);
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for (j = 0; j < li->mappings_count; j++) {
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mi = li->mappings[j];
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pi = mi->proc;
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printf( " %6s %6zdK %6zdK %6zdK %6zdK ", "",
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mi->usage.vss / 1024,
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mi->usage.rss / 1024,
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mi->usage.pss / 1024,
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mi->usage.uss / 1024);
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if (has_swap) {
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printf("%6zdK ", mi->usage.swap / 1024);
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}
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printf(" %s [%d]\n",
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pi->cmdline,
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pi->pid);
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}
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printf("\n");
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fflush(stdout);
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}
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return 0;
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}
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static void usage(char *myname) {
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fprintf(stderr, "Usage: %s [ -P | -L ] [ -v | -r | -p | -u | -s | -h ]\n"
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"\n"
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"Sort options:\n"
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" -v Sort processes by VSS.\n"
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" -r Sort processes by RSS.\n"
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" -p Sort processes by PSS.\n"
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" -u Sort processes by USS.\n"
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" -s Sort processes by swap.\n"
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" (Default sort order is PSS.)\n"
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" -a Show all mappings, including stack, heap and anon.\n"
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" -P /path Limit libraries displayed to those in path.\n"
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" -R Reverse sort order (default is descending).\n"
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" -m [r][w][x] Only list pages that exactly match permissions\n"
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" -c Only show cached (storage backed) pages\n"
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" -C Only show non-cached (ram/swap backed) pages\n"
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" -k Only show pages collapsed by KSM\n"
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" -h Display this help screen.\n",
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myname);
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}
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static int getprocname(pid_t pid, char *buf, size_t len) {
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char filename[20];
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FILE *f;
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sprintf(filename, "/proc/%d/cmdline", pid);
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f = fopen(filename, "r");
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if (!f) { *buf = '\0'; return 1; }
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if (!fgets(buf, len, f)) { *buf = '\0'; return 2; }
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fclose(f);
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return 0;
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}
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static int numcmp(long long a, long long b) {
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if (a < b) return -1;
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if (a > b) return 1;
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return 0;
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}
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static int licmp(const void *a, const void *b) {
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return order * numcmp(
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(*((struct library_info**)a))->total_usage.pss,
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(*((struct library_info**)b))->total_usage.pss
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);
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}
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#define create_sort(field, compfn) \
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static int sort_by_ ## field (const void *a, const void *b) { \
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return order * compfn( \
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(*((struct mapping_info**)a))->usage.field, \
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(*((struct mapping_info**)b))->usage.field \
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); \
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}
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create_sort(vss, numcmp)
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create_sort(rss, numcmp)
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create_sort(pss, numcmp)
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create_sort(uss, numcmp)
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create_sort(swap, numcmp)
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