Attach Qt main c++ thread to jvm at the early beginning

We need it
1. to be sure, that thread is already attached to jvm
when we attach debugger to the process
2. to have a human-friendly name for main native thread

Change-Id: I1e572a0f09ec8af24a910835aaa6d302f6f2cb43
Reviewed-by: BogDan Vatra <bogdan@kdab.com>

1 files changed, 11 insertions, 0 deletions

diff --git a/src/plugins/platforms/android/androidjnimain.cpp b/src/plugins/platforms/android/androidjnimain.cpp
index ad2fef7070..594fcbadad 100644
--- a/src/plugins/platforms/android/androidjnimain.cpp
+++ b/src/plugins/platforms/android/androidjnimain.cpp
@@ -450,6 +450,17 @@ static jboolean startQtAndroidPlugin(JNIEnv* /*env*/, jobject /*object*//*, jobj
 
 static void *startMainMethod(void */*data*/)
 {
+    {
+        JNIEnv* env = nullptr;
+        JavaVMAttachArgs args;
+        args.version = JNI_VERSION_1_6;
+        args.name = "QtMainThread";
+        args.group = NULL;
+        JavaVM *vm = QtAndroidPrivate::javaVM();
+        if (vm != 0)
+            vm->AttachCurrentThread(&env, &args);
+    }
+
     QVarLengthArray<const char *> params(m_applicationParams.size());
     for (int i = 0; i < m_applicationParams.size(); i++)
         params[i] = static_cast<const char *>(m_applicationParams[i].constData());