gdb/

	* frame.c (frame_unwind_pc): Rename to ...
	(frame_unwind_pc_if_available): ... this.  New `pc' output
	parameter.  Change return type to int.  Gracefully handle
	gdbarch_unwind_pc throwing NOT_AVAILABLE_ERROR.  Return 0 if that
	happened, or 1 otherwise.
	(frame_unwind_pc): Reimplement on top of
	frame_unwind_pc_if_available.
	(get_frame_func): Rename to ...
	(get_frame_func_if_available): New `pc' output parameter.  Change
	return type to int.  Gracefully handle the PC not being available.
	(get_frame_func): Reimplement on top of
	get_frame_func_if_available.
	(select_frame): Handle the PC being unavailable.
	(get_prev_frame): Handle the PC being unavailable.
	(get_frame_pc_if_available): New.
	(get_frame_address_in_block_if_available): New.
	(find_frame_sal): Handle the frame PC not being available.
	* frame.h (get_frame_pc_if_available): Declare.
	(get_frame_address_in_block_if_available): Declare.
	(get_frame_func_if_available): Declare.
	* stack.c (print_frame_info): Handle the PC being unavailable.
	(find_frame_funname): Ditto.
	(print_frame): Handle the PC being unavailable.
	(get_frame_language): Ditto.
	* blockframe.c (get_frame_block): Ditto.
	* macroscope.c (default_macro_scope): Ditto.
	* tui/tui-stack.c (tui_show_frame_info): Ditto.

1 files changed, 22 insertions, 0 deletions

diff --git a/gdb/frame.h b/gdb/frame.h
index e7053a8e7f5..25f20a944f7 100644
--- a/gdb/frame.h
+++ b/gdb/frame.h
@@ -284,6 +284,12 @@ extern struct frame_info *frame_find_by_id (struct frame_id id);
    This replaced: frame->pc; */
 extern CORE_ADDR get_frame_pc (struct frame_info *);
 
+/* Same as get_frame_pc, but return a boolean indication of whether
+   the PC is actually available, instead of throwing an error.  */
+
+extern int get_frame_pc_if_available (struct frame_info *frame,
+				      CORE_ADDR *pc);
+
 /* An address (not necessarily aligned to an instruction boundary)
    that falls within THIS frame's code block.
 
@@ -299,6 +305,15 @@ extern CORE_ADDR get_frame_pc (struct frame_info *);
 
 extern CORE_ADDR get_frame_address_in_block (struct frame_info *this_frame);
 
+/* Same as get_frame_address_in_block, but returns a boolean
+   indication of whether the frame address is determinable (when the
+   PC is unavailable, it will not be), instead of possibly throwing an
+   error trying to read an unavailable PC.  */
+
+extern int
+  get_frame_address_in_block_if_available (struct frame_info *this_frame,
+					   CORE_ADDR *pc);
+
 /* The frame's inner-most bound.  AKA the stack-pointer.  Confusingly
    known as top-of-stack.  */
 
@@ -309,6 +324,13 @@ extern CORE_ADDR get_frame_sp (struct frame_info *);
    that function isn't known.  */
 extern CORE_ADDR get_frame_func (struct frame_info *fi);
 
+/* Same as get_frame_func, but returns a boolean indication of whether
+   the frame function is determinable (when the PC is unavailable, it
+   will not be), instead of possibly throwing an error trying to read
+   an unavailable PC.  */
+
+extern int get_frame_func_if_available (struct frame_info *fi, CORE_ADDR *);
+
 /* Closely related to the resume address, various symbol table
    attributes that are determined by the PC.  Note that for a normal
    frame, the PC refers to the resume address after the return, and