Merge "binder: remove dead logging code" into main am: 37a8f0f384 (b0132893) · Commits · e / os / android_frameworks_base

core/jni/android_util_Binder.cpp

+0 −116

Original line number	Diff line number	Diff line
		@@ -1305,103 +1305,6 @@ static jboolean android_os_BinderProxy_isBinderAlive(JNIEnv* env, jobject obj)
		return alive ? JNI_TRUE : JNI_FALSE;
		}

		static int getprocname(pid_t pid, char *buf, size_t len) {
		char filename[32];
		FILE *f;

		snprintf(filename, sizeof(filename), "/proc/%d/cmdline", pid);
		f = fopen(filename, "re");
		if (!f) {
		*buf = '\0';
		return 1;
		}
		if (!fgets(buf, len, f)) {
		*buf = '\0';
		fclose(f);
		return 2;
		}
		fclose(f);
		return 0;
		}

		static bool push_eventlog_string(char** pos, const char* end, const char* str) {
		jint len = strlen(str);
		int space_needed = 1 + sizeof(len) + len;
		if (end - *pos < space_needed) {
		ALOGW("not enough space for string. remain=%" PRIdPTR "; needed=%d",
		end - *pos, space_needed);
		return false;
		}
		**pos = EVENT_TYPE_STRING;
		(*pos)++;
		memcpy(*pos, &len, sizeof(len));
		*pos += sizeof(len);
		memcpy(*pos, str, len);
		*pos += len;
		return true;
		}

		static bool push_eventlog_int(char** pos, const char* end, jint val) {
		int space_needed = 1 + sizeof(val);
		if (end - *pos < space_needed) {
		ALOGW("not enough space for int. remain=%" PRIdPTR "; needed=%d",
		end - *pos, space_needed);
		return false;
		}
		**pos = EVENT_TYPE_INT;
		(*pos)++;
		memcpy(*pos, &val, sizeof(val));
		*pos += sizeof(val);
		return true;
		}

		// From frameworks/base/core/java/android/content/EventLogTags.logtags:

		static const bool kEnableBinderSample = false;

		#define LOGTAG_BINDER_OPERATION 52004

		static void conditionally_log_binder_call(int64_t start_millis,
		IBinder* target, jint code) {
		int duration_ms = static_cast<int>(uptimeMillis() - start_millis);

		int sample_percent;
		if (duration_ms >= 500) {
		sample_percent = 100;
		} else {
		sample_percent = 100 * duration_ms / 500;
		if (sample_percent == 0) {
		return;
		}
		if (sample_percent < (random() % 100 + 1)) {
		return;
		}
		}

		char process_name[40];
		getprocname(getpid(), process_name, sizeof(process_name));
		String8 desc(target->getInterfaceDescriptor());

		char buf[LOGGER_ENTRY_MAX_PAYLOAD];
		buf[0] = EVENT_TYPE_LIST;
		buf[1] = 5;
		char* pos = &buf[2];
		char* end = &buf[LOGGER_ENTRY_MAX_PAYLOAD - 1]; // leave room for final \n
		if (!push_eventlog_string(&pos, end, desc.string())) return;
		if (!push_eventlog_int(&pos, end, code)) return;
		if (!push_eventlog_int(&pos, end, duration_ms)) return;
		if (!push_eventlog_string(&pos, end, process_name)) return;
		if (!push_eventlog_int(&pos, end, sample_percent)) return;
		*(pos++) = '\n'; // conventional with EVENT_TYPE_LIST apparently.
		android_bWriteLog(LOGTAG_BINDER_OPERATION, buf, pos - buf);
		}

		// We only measure binder call durations to potentially log them if
		// we're on the main thread.
		static bool should_time_binder_calls() {
		return (getpid() == gettid());
		}

		static jboolean android_os_BinderProxy_transact(JNIEnv* env, jobject obj,
		jint code, jobject dataObj, jobject replyObj, jint flags) // throws RemoteException
		{
		@@ -1428,29 +1331,10 @@ static jboolean android_os_BinderProxy_transact(JNIEnv* env, jobject obj,
		ALOGV("Java code calling transact on %p in Java object %p with code %" PRId32 "\n",
		target, obj, code);


		bool time_binder_calls;
		int64_t start_millis;
		if (kEnableBinderSample) {
		// Only log the binder call duration for things on the Java-level main thread.
		// But if we don't
		time_binder_calls = should_time_binder_calls();

		if (time_binder_calls) {
		start_millis = uptimeMillis();
		}
		}

		//printf("Transact from Java code to %p sending: ", target); data->print();
		status_t err = target->transact(code, *data, reply, flags);
		//if (reply) printf("Transact from Java code to %p received: ", target); reply->print();

		if (kEnableBinderSample) {
		if (time_binder_calls) {
		conditionally_log_binder_call(start_millis, target, code);
		}
		}

		if (err == NO_ERROR) {
		return JNI_TRUE;
		} else if (err == UNKNOWN_TRANSACTION) {