EXAMPLE: libbinderdebug: generic metric collector
Example binary to collect binder threadpool
usage plus client count for metric dashboards.
Note: dumpsys is already doing similar things as this.
If we have the generic format, we would probably
re-write /system/bin/dumpsys to support that format
rather than needing to use this other binary.
Bug: N/A
Test: N/A
Change-Id: I9f300f05e9475b6d39e8071e5843eccfb3584bc4
diff --git a/libs/binderdebug/stats.cpp b/libs/binderdebug/stats.cpp
new file mode 100644
index 0000000..9c26afa
--- /dev/null
+++ b/libs/binderdebug/stats.cpp
@@ -0,0 +1,62 @@
+/*
+ * Copyright (C) 2023 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 <android-base/logging.h>
+#include <binder/BpBinder.h>
+#include <binder/IServiceManager.h>
+#include <binderdebug/BinderDebug.h>
+#include <utils/Errors.h>
+
+#include <inttypes.h>
+
+namespace android {
+
+extern "C" int main() {
+ // ignore args - we only print csv
+
+ // we should use a csv library here for escaping, because
+ // the name is coming from another process
+ printf("name,binder_threads_in_use,binder_threads_started,client_count\n");
+
+ for (const String16& name : defaultServiceManager()->listServices()) {
+ sp<IBinder> binder = defaultServiceManager()->checkService(name);
+ if (binder == nullptr) {
+ fprintf(stderr, "%s is null", String8(name).c_str());
+ continue;
+ }
+
+ BpBinder* remote = binder->remoteBinder();
+ const auto handle = remote->getDebugBinderHandle();
+ CHECK(handle != std::nullopt);
+
+ pid_t pid;
+ CHECK_EQ(OK, binder->getDebugPid(&pid));
+
+ BinderPidInfo info;
+ CHECK_EQ(OK, getBinderPidInfo(BinderDebugContext::BINDER, pid, &info));
+
+ std::vector<pid_t> clientPids;
+ CHECK_EQ(OK,
+ getBinderClientPids(BinderDebugContext::BINDER, getpid(), pid, *handle,
+ &clientPids));
+
+ printf("%s,%" PRIu32 ",%" PRIu32 ",%zu\n", String8(name).c_str(), info.threadUsage,
+ info.threadCount, clientPids.size());
+ }
+ return 0;
+}
+
+} // namespace android