Zero stack walker tweak

[Gary Benson]

Hi all,

This commit combines the handling of most of the different types of
frame you get with Zero and Shark.  The old method mirrors how it's
done for the architecture-specific HotSpot ports, but it's unnecessary
with Zero.  I balked at adding yet another unnecessary special case to
handle Shark-compiled JNI method wrappers...

Cheers,
Gary

--
http://gbenson.net/

diff -r b078cdccad9c -r 3adabf9ea7ef ChangeLog
--- a/ChangeLog Wed Nov 11 10:30:19 2009 +0000
+++ b/ChangeLog Wed Nov 11 10:34:05 2009 +0000
@@ -1,3 +1,15 @@
[phone]  Gary Benson  <gbenson@...>
+
+ * ports/hotspot/src/cpu/zero/vm/frame_zero.hpp
+ (frame::is_fake_stub_frame): Removed.
+ (frame::sender_for_fake_stub_frame): Likewise.
+ (frame::sender_for_nonentry_frame): New method.
+ * ports/hotspot/src/cpu/zero/vm/frame_zero.cpp
+ (frame::is_fake_stub_frame): Removed.
+ (frame::sender_for_fake_stub_frame): Likewise.
+ (frame::sender_for_nonentry_frame): New method.
+ (frame::sender): Refactored.
+
 2009-11-11  Gary Benson  <gbenson@...>
 
  * ports/hotspot/src/cpu/zero/vm/entry_zero.hpp
diff -r b078cdccad9c -r 3adabf9ea7ef ports/hotspot/src/cpu/zero/vm/frame_zero.cpp
--- a/ports/hotspot/src/cpu/zero/vm/frame_zero.cpp Wed Nov 11 10:30:19 2009 +0000
+++ b/ports/hotspot/src/cpu/zero/vm/frame_zero.cpp Wed Nov 11 10:34:05 2009 +0000
@@ -36,10 +36,6 @@
   return zeroframe()->is_interpreter_frame();
 }
 
-bool frame::is_fake_stub_frame() const {
-  return zeroframe()->is_fake_stub_frame();
-}
-
 frame frame::sender_for_entry_frame(RegisterMap *map) const {
   assert(map != NULL, "map must be set");
   assert(!entry_frame_is_first(), "next Java fp must be non zero");
@@ -50,15 +46,7 @@
   return frame(sender_sp(), sp() + 1);
 }
 
-frame frame::sender_for_interpreter_frame(RegisterMap *map) const {
-  return frame(sender_sp(), sp() + 1);
-}
-
-frame frame::sender_for_compiled_frame(RegisterMap *map) const {
-  return frame(sender_sp(), sp() + 1);
-}
-
-frame frame::sender_for_fake_stub_frame(RegisterMap *map) const {
+frame frame::sender_for_nonentry_frame(RegisterMap *map) const {
   return frame(sender_sp(), sp() + 1);
 }
 
@@ -69,17 +57,8 @@
 
   if (is_entry_frame())
     return sender_for_entry_frame(map);
-
-  if (is_interpreted_frame())
-    return sender_for_interpreter_frame(map);
-
-  if (is_compiled_frame())
-    return sender_for_compiled_frame(map);
-
-  if (is_fake_stub_frame())
-    return sender_for_fake_stub_frame(map);
-
-  ShouldNotReachHere();
+  else
+    return sender_for_nonentry_frame(map);
 }
 
 #ifdef CC_INTERP
diff -r b078cdccad9c -r 3adabf9ea7ef ports/hotspot/src/cpu/zero/vm/frame_zero.hpp
--- a/ports/hotspot/src/cpu/zero/vm/frame_zero.hpp Wed Nov 11 10:30:19 2009 +0000
+++ b/ports/hotspot/src/cpu/zero/vm/frame_zero.hpp Wed Nov 11 10:34:05 2009 +0000
@@ -65,10 +65,7 @@
   }
 
  public:
-  bool is_fake_stub_frame() const;
-
- public:
-  frame sender_for_fake_stub_frame(RegisterMap* map) const;
+  frame sender_for_nonentry_frame(RegisterMap* map) const;
 
  public:
   void zero_print_on_error(int           index,