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Commit 1fb2fad8 authored by Steven Moreland's avatar Steven Moreland
Browse files

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
parent 69e22e9e

libs/binderdebug/Android.bp

+11 −0
Original line number Diff line number Diff line
@@ -21,6 +21,17 @@ package { 
    default_applicable_licenses: ["frameworks_native_license"],

}



cc_benchmark {

    name: "binder_thread_stats",

    shared_libs: [

        "libutils",

        "libbinder",

        "libbase",

    ],

    static_libs: ["libbinderdebug"],

    srcs: ["stats.cpp"],

}



cc_library {

    name: "libbinderdebug",

    vendor_available: true,

libs/binderdebug/stats.cpp

0 → 100644
+62 −0
Original line number Diff line number Diff line 
/*

 * 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