Initial libmemtrack
libmemtrack is an interface to a device-specific Memory Tracker HAL
to account for memory that may not show up in the normal memory
usage tools that walk /proc/pid/maps.
Bug: 10294768
Change-Id: I436f6799898df0bf8bf29747be3bc9dea5721185
diff --git a/libmemtrack/memtrack_test.c b/libmemtrack/memtrack_test.c
new file mode 100644
index 0000000..f306f67
--- /dev/null
+++ b/libmemtrack/memtrack_test.c
@@ -0,0 +1,145 @@
+/*
+ * Copyright (C) 2013 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 <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/types.h>
+
+#include <memtrack.h>
+
+#include <pagemap/pagemap.h>
+
+#define DIV_ROUND_UP(x,y) (((x) + (y) - 1) / (y))
+
+static int getprocname(pid_t pid, char *buf, int len) {
+ char *filename;
+ FILE *f;
+ int rc = 0;
+ static const char* unknown_cmdline = "<unknown>";
+
+ if (len <= 0) {
+ return -1;
+ }
+
+ if (asprintf(&filename, "/proc/%zd/cmdline", pid) < 0) {
+ rc = 1;
+ goto exit;
+ }
+
+ f = fopen(filename, "r");
+ if (f == NULL) {
+ rc = 2;
+ goto releasefilename;
+ }
+
+ if (fgets(buf, len, f) == NULL) {
+ rc = 3;
+ goto closefile;
+ }
+
+closefile:
+ (void) fclose(f);
+releasefilename:
+ free(filename);
+exit:
+ if (rc != 0) {
+ /*
+ * The process went away before we could read its process name. Try
+ * to give the user "<unknown>" here, but otherwise they get to look
+ * at a blank.
+ */
+ if (strlcpy(buf, unknown_cmdline, (size_t)len) >= (size_t)len) {
+ rc = 4;
+ }
+ }
+
+ return rc;
+}
+
+int main(int argc, char *argv[])
+{
+ int ret;
+ pm_kernel_t *ker;
+ size_t num_procs;
+ pid_t *pids;
+ struct memtrack_proc *p;
+ size_t i;
+
+ (void)argc;
+ (void)argv;
+
+ ret = memtrack_init();
+ if (ret < 0) {
+ fprintf(stderr, "failed to initialize HAL: %s (%d)\n", strerror(-ret), ret);
+ exit(EXIT_FAILURE);
+ }
+
+ ret = pm_kernel_create(&ker);
+ if (ret) {
+ fprintf(stderr, "Error creating kernel interface -- "
+ "does this kernel have pagemap?\n");
+ exit(EXIT_FAILURE);
+ }
+
+ ret = pm_kernel_pids(ker, &pids, &num_procs);
+ if (ret) {
+ fprintf(stderr, "Error listing processes.\n");
+ exit(EXIT_FAILURE);
+ }
+
+ p = memtrack_proc_new();
+ if (ret) {
+ fprintf(stderr, "failed to create memtrack process handle\n");
+ exit(EXIT_FAILURE);
+ }
+
+ for (i = 0; i < num_procs; i++) {
+ pid_t pid = pids[i];
+ char cmdline[256];
+ size_t v1;
+ size_t v2;
+ size_t v3;
+ size_t v4;
+ size_t v5;
+ size_t v6;
+
+ getprocname(pid, cmdline, (int)sizeof(cmdline));
+
+ ret = memtrack_proc_get(p, pid);
+ if (ret) {
+ fprintf(stderr, "failed to get memory info for pid %d: %s (%d)\n",
+ pid, strerror(-ret), ret);
+ continue;
+ }
+
+ v1 = DIV_ROUND_UP(memtrack_proc_graphics_total(p), 1024);
+ v2 = DIV_ROUND_UP(memtrack_proc_graphics_pss(p), 1024);
+ v3 = DIV_ROUND_UP(memtrack_proc_gl_total(p), 1024);
+ v4 = DIV_ROUND_UP(memtrack_proc_gl_pss(p), 1024);
+ v5 = DIV_ROUND_UP(memtrack_proc_other_total(p), 1024);
+ v6 = DIV_ROUND_UP(memtrack_proc_other_pss(p), 1024);
+
+ if (v1 | v2 | v3 | v4 | v5 | v6) {
+ printf("%5d %6zu %6zu %6zu %6zu %6zu %6zu %s\n", pid,
+ v1, v2, v3, v4, v5, v6, cmdline);
+ }
+ }
+
+ memtrack_proc_destroy(p);
+
+ return 0;
+}