Tell JVM to not wait for HWUI worker threads upon shutdown

RenderThread is setup as a daemon thread, which allows JVM to
exit without waiting on it. This CL does same setup for HWUI
worker threads, which offload work from the RenderThread.
This fixes an issue exposed by Vulkan pipeline, which is pushing
different loads to the worker threads and causing some java tests
to hang on exit. This is not a Vulkan specific issue, because GL
also hangs if worker thread is started.

Bug: 123374538
Test: Ran DismissDialogsInstrumentation test
Change-Id: Ie4ee94737ced975323a0792f57f8426c958e8056

1 files changed, 6 insertions, 0 deletions

diff --git a/libs/hwui/thread/TaskManager.cpp b/libs/hwui/thread/TaskManager.cpp
index 26ff6ebad3b4..6493d495716e 100644
--- a/libs/hwui/thread/TaskManager.cpp
+++ b/libs/hwui/thread/TaskManager.cpp
@@ -21,6 +21,7 @@
 #include "TaskManager.h"
 #include "TaskProcessor.h"
 #include "utils/MathUtils.h"
+#include "renderthread/RenderThread.h"
 
 namespace android {
 namespace uirenderer {
@@ -84,6 +85,11 @@ bool TaskManager::addTaskBase(const sp<TaskBase>& task, const sp<TaskProcessorBa
 
 status_t TaskManager::WorkerThread::readyToRun() {
     setpriority(PRIO_PROCESS, 0, PRIORITY_FOREGROUND);
+    auto onStartHook = renderthread::RenderThread::getOnStartHook();
+    if (onStartHook) {
+        onStartHook();
+    }
+
     return NO_ERROR;
 }