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* findvar.c (value_of_register): Mark the value as unavailable, if
	the register is unavailable.
	* frame.h (frame_register_unwind): New `unavailablep' parameter.
	(frame_register): New `unavailablep' parameter.
	(frame_register_read): Update comment.
	* frame.c (frame_register_unwind): New `unavailablep' parameter.
	Set it if the register is unavailable.  If the register is
	unavailable, clear the output buffer.
	(frame_register): New `unavailablep' parameter.  Pass it down.
	(frame_unwind_register): Adjust.
	(put_frame_register): Adjust.
	(frame_register_read): Adjust.  Also return false if the register
	is not available.
	(frame_register_unwind_location): Adjust.
	* sentinel-frame.c (sentinel_frame_prev_register): If the register
	is unavailable, mark the value accordingly.
	* stack.c (frame_info): Handle unavailable registers.

	gdb/testsuite/
	* gdb.trace/unavailable.exp (fpreg, spreg, pcreg): Define.
	(test_register, test_register_unavailable): New procedures.
	(gdb_unavailable_registers_test): New procedure.
	(gdb_trace_collection_test): Call it.
This commit is contained in:
Pedro Alves 2011-03-18 18:41:36 +00:00
parent e69aa73e27
commit 0fdb4f184b
8 changed files with 189 additions and 35 deletions
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15
gdb/findvar.c
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@ -265,6 +265,7 @@ value_of_register (int regnum, struct frame_info *frame)
struct gdbarch *gdbarch = get_frame_arch (frame);
CORE_ADDR addr;
int optim;
int unavail;
struct value *reg_val;
int realnum;
gdb_byte raw_buffer[MAX_REGISTER_SIZE];
@ -276,16 +277,24 @@ value_of_register (int regnum, struct frame_info *frame)
+ gdbarch_num_pseudo_regs (gdbarch))
return value_of_user_reg (regnum, frame);
frame_register (frame, regnum, &optim, &lval, &addr, &realnum, raw_buffer);
frame_register (frame, regnum, &optim, &unavail,
&lval, &addr, &realnum, raw_buffer);
reg_val = allocate_value (register_type (gdbarch, regnum));
memcpy (value_contents_raw (reg_val), raw_buffer,
register_size (gdbarch, regnum));
if (!optim && !unavail)
memcpy (value_contents_raw (reg_val), raw_buffer,
register_size (gdbarch, regnum));
else
memset (value_contents_raw (reg_val), 0,
register_size (gdbarch, regnum));
VALUE_LVAL (reg_val) = lval;
set_value_address (reg_val, addr);
VALUE_REGNUM (reg_val) = regnum;
set_value_optimized_out (reg_val, optim);
if (unavail)
mark_value_bytes_unavailable (reg_val, 0, register_size (gdbarch, regnum));
VALUE_FRAME_ID (reg_val) = get_frame_id (frame);
return reg_val;
}