btrace: extend struct btrace_insn

btrace: extend struct btrace_insn

Add the instruction's size as well as a coarse classification to struct
btrace_insn.  Use the information in ftrace_update_function and
ftrace_find_call.

2015-02-09  Markus Metzger  <markus.t.metzger@intel.com>

	* btrace.h (btrace_insn_class): New.
	(btrace_insn) <size, iclass>: New.
	* btrace.c (ftrace_find_call): Update parameters.  Update users.
	Use instruction classification.
	(ftrace_new_return): Update parameters.  Update users.
	(ftrace_update_function): Update parameters.  Update users.  Use
	instruction classification.
	(ftrace_update_insns): Update parameters.  Update users.
	(ftrace_classify_insn): New.
	(btrace_compute_ftrace_bts): Fill in new btrace_insn fields.  Add
	TRY_CATCH around call to gdb_insn_length.