Label Threads, Fibers, & MachineThreads in VM backtrace.

Author: brixen

machine/memory/managed.hpp

@@ -88,6 +88,17 @@ namespace memory {
       }
     }
 
+    const char* kind_name() const {
+      switch(kind_) {
+        case eThread:
+          return "Thread";
+        case eFiber:
+          return "Fiber";
+        case eSystem:
+          return "MachineThread";
+      }
+    }
+
     Kind kind() const {
       return kind_;
     }

machine/signal.cpp

@@ -310,7 +310,7 @@ namespace rubinius {
 
       while(frame) {
         if(first) {
-          logger::fatal("--- Thread %d backtrace ---", vm->thread_id());
+          logger::fatal("--- %s %d backtrace ---", vm->kind_name(), vm->thread_id());
           first = false;
         }