Fix RenderThread and worker thread names used by tools

Test: collected systrace and RenderThread hwuiTask1/2 shown
Change-Id: I1114ff72a7ed8c9dc86a64ebd15ca783d1b2ff08

core/jni/android_view_ThreadedRenderer.cpp

@@ -1202,12 +1202,12 @@ static const JNINativeMethod gMethods[] = {
 
 static JavaVM* mJvm = nullptr;
 
-static void attachRenderThreadToJvm() {
+static void attachRenderThreadToJvm(const char* name) {
     LOG_ALWAYS_FATAL_IF(!mJvm, "No jvm but we set the hook??");
 
     JavaVMAttachArgs args;
     args.version = JNI_VERSION_1_4;
-    args.name = NULL;
+    args.name = name;
     args.group = NULL;
     JNIEnv* env;
     mJvm->AttachCurrentThreadAsDaemon(&env, (void*) &args);

libs/hwui/renderthread/RenderThread.cpp

@@ -329,7 +329,7 @@ void RenderThread::requestVsync() {
 bool RenderThread::threadLoop() {
     setpriority(PRIO_PROCESS, 0, PRIORITY_DISPLAY);
     if (gOnStartHook) {
-        gOnStartHook();
+        gOnStartHook("RenderThread");
     }
     initThreadLocals();
 

libs/hwui/renderthread/RenderThread.h

@@ -75,7 +75,7 @@ struct VsyncSource {
 
 class DummyVsyncSource;
 
-typedef void (*JVMAttachHook)();
+typedef void (*JVMAttachHook)(const char* name);
 
 class RenderThread : private ThreadBase {
     PREVENT_COPY_AND_ASSIGN(RenderThread);

libs/hwui/thread/TaskManager.cpp

@@ -87,7 +87,7 @@ status_t TaskManager::WorkerThread::readyToRun() {
     setpriority(PRIO_PROCESS, 0, PRIORITY_FOREGROUND);
     auto onStartHook = renderthread::RenderThread::getOnStartHook();
     if (onStartHook) {
-        onStartHook();
+        onStartHook(mName.c_str());
     }
 
     return NO_ERROR;