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Convert frame unwinders to use the current frame and

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"struct value".

	* frame.c (frame_debug): Make global.
	(get_frame_id): Pass this frame to unwinder routines.
	(frame_pc_unwind): Remove unused unwind->prev_pc support.
	(do_frame_register_read): Do not discard the return value of
	frame_register_read.
	(frame_register_unwind): Remove debug messages.  Use
	frame_unwind_register_value.
	(frame_unwind_register_value, get_frame_register_value): New
	functions.
	(create_new_frame, get_frame_base_address, get_frame_locals_address)
	(get_frame_args_address, get_frame_type): Pass this frame to
	unwinder routines.
	(frame_cleanup_after_sniffer, frame_prepare_for_sniffer): New
	functions.
	* frame.h: Update comments.
	(frame_debug, frame_unwind_register_value, get_frame_register_value)
	(frame_prepare_for_sniffer): Declare.
	* frame-unwind.h: Update comments and parameter names.
	(default_frame_sniffer): Declare.
	(frame_prev_register_ftype): Return a struct value *.
	(struct frame_unwind): Remove prev_pc member.
	(frame_unwind_sniffer_ftype, frame_unwind_append_sniffer): Delete.
	(frame_unwind_append_unwinder, frame_unwind_got_optimized)
	(frame_unwind_got_register, frame_unwind_got_memory)
	(frame_unwind_got_constant, frame_unwind_got_address): Declare.
	* frame-base.h: Update comments and parameter names.
	* valops.c (value_fetch_lazy): Use get_frame_register_value.  Iterate
	if necessary.  Add debugging output.
	* sentinel-frame.c (sentinel_frame_prev_register)
	(sentinel_frame_this_id): Update for new signature.
	(sentinel_frame_prev_pc): Delete.
	(sentinel_frame_unwinder): Remove prev_pc.
	* ia64-tdep.c (ia64_libunwind_frame_unwind): Do not initialize
	prev_pc.
	* libunwind-frame.c (libunwind_frame_unwind): Likewise.
	* frame-unwind.c (struct frame_unwind_table_entry): Remove sniffer.
	(frame_unwind_append_sniffer): Delete.
	(frame_unwind_append_unwinder): New function.
	(frame_unwind_find_by_frame): Take this frame.  Only use sniffers
	from unwinders.  Use frame_prepare_for_sniffer.
	(default_frame_sniffer, frame_unwind_got_optimized)
	(frame_unwind_got_register, frame_unwind_got_memory)
	(frame_unwind_got_constant, frame_unwind_got_address): New functions.
	* dummy-frame.c (dummy_frame_sniffer): Use gdbarch_dummy_id.
	(dummy_frame_prev_register, dummy_frame_this_id): Update for new
	signature.
	* gdbarch.sh: Replace unwind_dummy_id with dummy_id.
	* gdbarch.c, gdbarch.c: Regenerated.
	* frame-base.c (default_frame_base_address)
	(default_frame_locals_address, default_frame_args_address): Update
	for new signature.
	(frame_base_find_by_frame): Pass this frame to unwinder routines.
	* infcall.c (call_function_by_hand): Update comments.
	* Makefile.in (frame-unwind.o): Update dependencies.

	* gdbint.texinfo (Stack Frames): New chapter.
	(Algorithms): Move Frames text to the new chapter.
	(Target Conditionals): Delete SAVE_DUMMY_FRAME_TOS.  Document
	gdbarch_dummy_id instead of gdbarch_unwind_dummy_id.
This commit is contained in:
Daniel Jacobowitz 2008-04-30 21:16:46 +00:00
parent 9214ee5f5f
commit 669fac235d
19 changed files with 687 additions and 321 deletions
Download patch file Download diff file Expand all files Collapse all files

18
gdb/frame-base.h
View file

@ -28,9 +28,9 @@ struct gdbarch;
struct regcache;
/* Assuming the frame chain: (outer) prev <-> this <-> next (inner);
and that this is a `normal frame'; use the NEXT frame, and its
register unwind method, to determine the address of THIS frame's
`base'.
and that this is a `normal frame'; use THIS frame, and implicitly
the NEXT frame's register unwind method, to determine the address
of THIS frame's `base'.
The exact meaning of `base' is highly dependant on the type of the
debug info. It is assumed that dwarf2, stabs, ... will each
@ -42,17 +42,17 @@ struct regcache;
/* A generic base address. */
typedef CORE_ADDR (frame_this_base_ftype) (struct frame_info *next_frame,
typedef CORE_ADDR (frame_this_base_ftype) (struct frame_info *this_frame,
void **this_base_cache);
/* The base address of the frame's local variables. */
typedef CORE_ADDR (frame_this_locals_ftype) (struct frame_info *next_frame,
typedef CORE_ADDR (frame_this_locals_ftype) (struct frame_info *this_frame,
void **this_base_cache);
/* The base address of the frame's arguments / parameters. */
typedef CORE_ADDR (frame_this_args_ftype) (struct frame_info *next_frame,
typedef CORE_ADDR (frame_this_args_ftype) (struct frame_info *this_frame,
void **this_base_cache);
struct frame_base
@ -65,10 +65,10 @@ struct frame_base
frame_this_args_ftype *this_args;
};
/* Given the NEXT frame, return the frame base methods for THIS frame,
/* Given THIS frame, return the frame base methods for THIS frame,
or NULL if it can't handle THIS frame. */
typedef const struct frame_base *(frame_base_sniffer_ftype) (struct frame_info *next_frame);
typedef const struct frame_base *(frame_base_sniffer_ftype) (struct frame_info *this_frame);
/* Append a frame base sniffer to the list. The sniffers are polled
in the order that they are appended. */
@ -86,6 +86,6 @@ extern void frame_base_set_default (struct gdbarch *gdbarch,
/* Iterate through the list of frame base handlers until one returns
an implementation. */
extern const struct frame_base *frame_base_find_by_frame (struct frame_info *next_frame);
extern const struct frame_base *frame_base_find_by_frame (struct frame_info *this_frame);
#endif