auto import from //depot/cupcake/@135843
diff --git a/procrank/procrank.c b/procrank/procrank.c
new file mode 100644
index 0000000..585fddc
--- /dev/null
+++ b/procrank/procrank.c
@@ -0,0 +1,206 @@
+/*
+ * Copyright (C) 2008 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <dirent.h>
+#include <errno.h>
+#include <stdlib.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+#include <pagemap/pagemap.h>
+
+struct proc_info {
+ pid_t pid;
+ pm_memusage_t usage;
+ unsigned long wss;
+};
+
+static void usage(char *myname);
+static int getprocname(pid_t pid, char *buf, size_t len);
+static int numcmp(long long a, long long b);
+
+#define declare_sort(field) \
+ static int sort_by_ ## field (const void *a, const void *b)
+
+declare_sort(vss);
+declare_sort(rss);
+declare_sort(pss);
+declare_sort(uss);
+
+int (*compfn)(const void *a, const void *b);
+static int order;
+
+#define MAX_PROCS 256
+
+int main(int argc, char *argv[]) {
+ pm_kernel_t *ker;
+ pm_process_t *proc;
+ pid_t *pids;
+ struct proc_info *procs[MAX_PROCS];
+ size_t num_procs;
+ char cmdline[256];
+ int error;
+
+ #define WS_OFF 0
+ #define WS_ONLY 1
+ #define WS_RESET 2
+ int ws;
+
+ int i, j;
+
+ compfn = &sort_by_pss;
+ order = -1;
+ ws = WS_OFF;
+
+ for (i = 1; i < argc; i++) {
+ if (!strcmp(argv[i], "-v")) { compfn = &sort_by_vss; continue; }
+ if (!strcmp(argv[i], "-r")) { compfn = &sort_by_rss; continue; }
+ if (!strcmp(argv[i], "-p")) { compfn = &sort_by_pss; continue; }
+ if (!strcmp(argv[i], "-u")) { compfn = &sort_by_uss; continue; }
+ if (!strcmp(argv[i], "-w")) { ws = WS_ONLY; continue; }
+ if (!strcmp(argv[i], "-W")) { ws = WS_RESET; continue; }
+ if (!strcmp(argv[i], "-R")) { order *= -1; continue; }
+ if (!strcmp(argv[i], "-h")) { usage(argv[0]); exit(0); }
+ fprintf(stderr, "Invalid argument \"%s\".\n", argv[i]);
+ usage(argv[0]);
+ exit(EXIT_FAILURE);
+ }
+
+ error = pm_kernel_create(&ker);
+ if (error) {
+ fprintf(stderr, "Error creating kernel interface -- "
+ "does this kernel have pagemap?\n");
+ exit(EXIT_FAILURE);
+ }
+
+ error = pm_kernel_pids(ker, &pids, &num_procs);
+ if (error) {
+ fprintf(stderr, "Error listing processes.\n");
+ exit(EXIT_FAILURE);
+ }
+
+ for (i = 0; i < num_procs; i++) {
+ procs[i] = malloc(sizeof(struct proc_info));
+ if (!procs[i]) {
+ fprintf(stderr, "malloc: %s\n", strerror(errno));
+ exit(EXIT_FAILURE);
+ }
+ procs[i]->pid = pids[i];
+ error = pm_process_create(ker, pids[i], &proc);
+ if (!error) {
+ switch (ws) {
+ case WS_OFF:
+ pm_process_usage(proc, &procs[i]->usage);
+ break;
+ case WS_ONLY:
+ pm_process_workingset(proc, &procs[i]->usage, 0);
+ break;
+ case WS_RESET:
+ pm_process_workingset(proc, NULL, 1);
+ break;
+ }
+ pm_process_destroy(proc);
+ } else {
+ fprintf(stderr, "warning: could not create process interface for %d\n", pids[i]);
+ pm_memusage_zero(&procs[i]->usage);
+ }
+ }
+
+ free(pids);
+
+ if (ws == WS_RESET) exit(0);
+
+ j = 0;
+ for (i = 0; i < num_procs; i++) {
+ if (procs[i]->usage.vss)
+ procs[j++] = procs[i];
+ }
+ num_procs = j;
+
+ qsort(procs, num_procs, sizeof(procs[0]), compfn);
+
+ if (ws)
+ printf("%5s %7s %7s %7s %s\n", "PID", "WRss", "WPss", "WUss", "cmdline");
+ else
+ printf("%5s %7s %7s %7s %7s %s\n", "PID", "Vss", "Rss", "Pss", "Uss", "cmdline");
+ for (i = 0; i < num_procs; i++) {
+ getprocname(procs[i]->pid, cmdline, sizeof(cmdline));
+ if (ws)
+ printf("%5d %6dK %6dK %6dK %s\n",
+ procs[i]->pid,
+ procs[i]->usage.rss / 1024,
+ procs[i]->usage.pss / 1024,
+ procs[i]->usage.uss / 1024,
+ cmdline
+ );
+ else
+ printf("%5d %6dK %6dK %6dK %6dK %s\n",
+ procs[i]->pid,
+ procs[i]->usage.vss / 1024,
+ procs[i]->usage.rss / 1024,
+ procs[i]->usage.pss / 1024,
+ procs[i]->usage.uss / 1024,
+ cmdline
+ );
+ }
+
+ return 0;
+}
+
+static void usage(char *myname) {
+ fprintf(stderr, "Usage: %s [ -W ] [ -v | -r | -p | -u | -h ]\n"
+ " -v Sort by VSS.\n"
+ " -r Sort by RSS.\n"
+ " -p Sort by PSS.\n"
+ " -u Sort by USS.\n"
+ " (Default sort order is PSS.)\n"
+ " -R Reverse sort order (default is descending).\n"
+ " -w Display statistics for working set only.\n"
+ " -W Reset working set of all processes.\n"
+ " -h Display this help screen.\n",
+ myname);
+}
+
+static int getprocname(pid_t pid, char *buf, size_t len) {
+ char filename[20];
+ FILE *f;
+
+ sprintf(filename, "/proc/%d/cmdline", pid);
+ f = fopen(filename, "r");
+ if (!f) { *buf = '\0'; return 1; }
+ if (!fgets(buf, len, f)) { *buf = '\0'; return 2; }
+ fclose(f);
+ return 0;
+}
+
+static int numcmp(long long a, long long b) {
+ if (a < b) return -1;
+ if (a > b) return 1;
+ return 0;
+}
+
+#define create_sort(field, compfn) \
+ static int sort_by_ ## field (const void *a, const void *b) { \
+ return order * compfn( \
+ (*((struct proc_info**)a))->usage.field, \
+ (*((struct proc_info**)b))->usage.field \
+ ); \
+ }
+
+create_sort(vss, numcmp)
+create_sort(rss, numcmp)
+create_sort(pss, numcmp)
+create_sort(uss, numcmp)