Add Tracing for Binder Caching (a6676ba7) · Commits · e / os / android_frameworks_native

libs/binder/BackendUnifiedServiceManager.cpp

+21 −2

Original line number	Diff line number	Diff line
		@@ -114,11 +114,30 @@ binder::Status BackendUnifiedServiceManager::updateCache(const std::string& serv
		if (!kUseCache) {
		return binder::Status::ok();
		}
		std::string traceStr;
		if (atrace_is_tag_enabled(ATRACE_TAG_AIDL)) {
		traceStr = "BinderCacheWithInvalidation::updateCache : " + serviceName;
		}
		binder::ScopedTrace aidlTrace(ATRACE_TAG_AIDL, traceStr.c_str());

		if (service.getTag() == os::Service::Tag::binder) {
		sp<IBinder> binder = service.get<os::Service::Tag::binder>();
		if (binder && mCacheForGetService->isClientSideCachingEnabled(serviceName) &&
		binder->isBinderAlive()) {
		if (!binder) {
		binder::ScopedTrace
		aidlTrace(ATRACE_TAG_AIDL,
		"BinderCacheWithInvalidation::updateCache failed: binder_null");
		} else if (!binder->isBinderAlive()) {
		binder::ScopedTrace aidlTrace(ATRACE_TAG_AIDL,
		"BinderCacheWithInvalidation::updateCache failed: "
		"isBinderAlive_false");
		} else if (mCacheForGetService->isClientSideCachingEnabled(serviceName)) {
		binder::ScopedTrace aidlTrace(ATRACE_TAG_AIDL,
		"BinderCacheWithInvalidation::updateCache successful");
		return mCacheForGetService->setItem(serviceName, binder);
		} else {
		binder::ScopedTrace aidlTrace(ATRACE_TAG_AIDL,
		"BinderCacheWithInvalidation::updateCache failed: "
		"caching_not_enabled");
		}
		}
		return binder::Status::ok();

+18 −0

Original line number	Diff line number	Diff line
		@@ -18,6 +18,7 @@
		#include <android/os/BnServiceManager.h>
		#include <android/os/IServiceManager.h>
		#include <binder/IPCThreadState.h>
		#include <binder/Trace.h>
		#include <map>
		#include <memory>

		@@ -59,6 +60,12 @@ public:
		}

		bool removeItem(const std::string& key, const sp<IBinder>& who) {
		std::string traceStr;
		uint64_t tag = ATRACE_TAG_AIDL;
		if (atrace_is_tag_enabled(tag)) {
		traceStr = "BinderCacheWithInvalidation::removeItem " + key;
		}
		binder::ScopedTrace aidlTrace(tag, traceStr.c_str());
		std::lock_guard<std::mutex> lock(mCacheMutex);
		if (auto it = mCache.find(key); it != mCache.end()) {
		if (it->second.service == who) {
		@@ -81,11 +88,22 @@ public:
		if (item->localBinder() == nullptr) {
		status_t status = item->linkToDeath(deathRecipient);
		if (status != android::OK) {
		std::string traceStr;
		uint64_t tag = ATRACE_TAG_AIDL;
		if (atrace_is_tag_enabled(tag)) {
		traceStr =
		"BinderCacheWithInvalidation::setItem Failed LinkToDeath for service " +
		key + " : " + std::to_string(status);
		}
		binder::ScopedTrace aidlTrace(tag, traceStr.c_str());

		ALOGE("Failed to linkToDeath binder for service %s. Error: %d", key.c_str(),
		status);
		return binder::Status::fromStatusT(status);
		}
		}
		binder::ScopedTrace aidlTrace(ATRACE_TAG_AIDL,
		"BinderCacheWithInvalidation::setItem Successfully Cached");
		std::lock_guard<std::mutex> lock(mCacheMutex);
		Entry entry = {.service = item, .deathRecipient = deathRecipient};
		mCache[key] = entry;