Add the signal catcher (for SIGQUIT and SIGUSR1).
Also fix some of the thread implementation.
Change-Id: If2d1b59a149ba1ac192ad9bc74319c8dff228549
diff --git a/src/signal_catcher.h b/src/signal_catcher.h
new file mode 100644
index 0000000..1c08542
--- /dev/null
+++ b/src/signal_catcher.h
@@ -0,0 +1,48 @@
+/*
+ * Copyright (C) 2008 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef ART_SRC_SIGNAL_CATCHER_H_
+#define ART_SRC_SIGNAL_CATCHER_H_
+
+#include <pthread.h>
+
+namespace art {
+
+class Runtime;
+class Thread;
+
+/*
+ * A thread that catches signals and does something useful. For
+ * example, when a SIGQUIT (Ctrl-\) arrives, we suspend and dump the
+ * status of all threads.
+ */
+class SignalCatcher {
+ public:
+ SignalCatcher();
+ ~SignalCatcher();
+
+ private:
+ static void* Run(void* arg);
+ static void HandleSigQuit();
+ static void HandleSigUsr1();
+
+ static bool halt_;
+ pthread_t thread_;
+};
+
+} // namespace art
+
+#endif // ART_SRC_SIGNAL_CATCHER_H_