note
	description: "Call record"
	status: "See notice at end of class."
	legal: "See notice at end of class."
	date: "$Date: 2018-11-14 14:54:22 +0000 (Wed, 14 Nov 2018) $"
	revision: "$Revision: 102461 $"

class 
	RT_DBG_CALL_RECORD

create 
	make

feature {NONE} -- Initialization

	default_create
			-- Process instances of classes with no creation clause.
			-- (Default: do nothing.)
			-- (from ANY)
		do
		end

	make (rec: like recorder; ref: ANY; cid, fid: INTEGER_32; dep: INTEGER_32)
			-- Make as call {cid}.fid for object ref and depth dep
		require
			rec_attached: rec /= Void
			ref_attached: ref /= Void
		do
			recorder := rec
			class_type_id := cid
			feature_rout_id := fid
			depth := dep
			object := ref
			is_expanded := object_is_expanded (ref)
			last_position := [0, 0]
			rt_information_available := True
			create steps.make (3)
		end

	recorder: RT_DBG_EXECUTION_RECORDER
			-- Associated recorder.
	
feature -- Access

	generating_type: TYPE [detachable RT_DBG_CALL_RECORD]
			-- Type of current object
			-- (type of which it is a direct instance)
			-- (from ANY)
		external
			"built_in"
		ensure -- from ANY
			generating_type_not_void: Result /= Void
		end

	generator: STRING_8
			-- Name of current object's generating class
			-- (base class of the type of which it is a direct instance)
			-- (from ANY)
		external
			"built_in"
		ensure -- from ANY
			generator_not_void: Result /= Void
			generator_not_empty: not Result.is_empty
		end
	
feature {NONE} -- Access

	Bit_type: INTEGER_32 = 8
			-- This type is obsolete and is not used anymore.
			-- (from REFLECTOR_CONSTANTS)

	Boolean_type: INTEGER_32 = 3
			-- Abstract type ID for predefined type BOOLEAN.
			-- (from REFLECTOR_CONSTANTS)

	Character_32_type: INTEGER_32 = 12
			-- Abstract type ID for predefined type CHARACTER_32.
			-- Was declared in REFLECTOR_CONSTANTS as synonym of Wide_character_type.
			-- (from REFLECTOR_CONSTANTS)

	Character_8_type: INTEGER_32 = 2
			-- Abstract type ID for predefined type CHARACTER_8.
			-- Was declared in REFLECTOR_CONSTANTS as synonym of Character_type.
			-- (from REFLECTOR_CONSTANTS)

	Character_type: INTEGER_32 = 2
			-- Abstract type ID for predefined type CHARACTER_8.
			-- Was declared in REFLECTOR_CONSTANTS as synonym of Character_8_type.
			-- (from REFLECTOR_CONSTANTS)

	Double_type: INTEGER_32 = 6
			-- Abstract type ID for predefined type REAL_64.
			-- Was declared in REFLECTOR_CONSTANTS as synonym of Real_64_type.
			-- (from REFLECTOR_CONSTANTS)

	Expanded_type: INTEGER_32 = 7
			-- Abstract type ID for a non-predefined expanded type.
			-- (from REFLECTOR_CONSTANTS)

	Integer_16_type: INTEGER_32 = 10
			-- Abstract type ID for predefined type INTEGER_16.
			-- (from REFLECTOR_CONSTANTS)

	Integer_32_type: INTEGER_32 = 4
			-- Abstract type ID for predefined type INTEGER_32.
			-- Was declared in REFLECTOR_CONSTANTS as synonym of Integer_type.
			-- (from REFLECTOR_CONSTANTS)

	Integer_64_type: INTEGER_32 = 11
			-- Abstract type ID for predefined type INTEGER_64.
			-- (from REFLECTOR_CONSTANTS)

	Integer_8_type: INTEGER_32 = 9
			-- Abstract type ID for predefined type INTEGER_8.
			-- (from REFLECTOR_CONSTANTS)

	Integer_type: INTEGER_32 = 4
			-- Abstract type ID for predefined type INTEGER_32.
			-- Was declared in REFLECTOR_CONSTANTS as synonym of Integer_32_type.
			-- (from REFLECTOR_CONSTANTS)

	Max_predefined_type: INTEGER_32 = 16
			-- (from REFLECTOR_CONSTANTS)

	Min_predefined_type: INTEGER_32 = -2
			-- (from REFLECTOR_CONSTANTS)

	Natural_16_type: INTEGER_32 = 14
			-- Abstract type ID for predefined type NATURAL_16.
			-- (from REFLECTOR_CONSTANTS)

	Natural_32_type: INTEGER_32 = 15
			-- Abstract type ID for predefined type NATURAL_32.
			-- (from REFLECTOR_CONSTANTS)

	Natural_64_type: INTEGER_32 = 16
			-- Abstract type ID for predefined type NATURAL_64.
			-- (from REFLECTOR_CONSTANTS)

	Natural_8_type: INTEGER_32 = 13
			-- Abstract type ID for predefined type NATURAL_8.
			-- (from REFLECTOR_CONSTANTS)

	None_type: INTEGER_32 = -2
			-- Type ID representation for NONE.
			-- (from REFLECTOR_CONSTANTS)

	Pointer_type: INTEGER_32 = 0
			-- Abstract type ID for predefined type POINTER.
			-- (from REFLECTOR_CONSTANTS)

	Real_32_type: INTEGER_32 = 5
			-- Abstract type ID for predefined type REAL_32.
			-- Was declared in REFLECTOR_CONSTANTS as synonym of Real_type.
			-- (from REFLECTOR_CONSTANTS)

	Real_64_type: INTEGER_32 = 6
			-- Abstract type ID for predefined type REAL_64.
			-- Was declared in REFLECTOR_CONSTANTS as synonym of Double_type.
			-- (from REFLECTOR_CONSTANTS)

	Real_type: INTEGER_32 = 5
			-- Abstract type ID for predefined type REAL_32.
			-- Was declared in REFLECTOR_CONSTANTS as synonym of Real_32_type.
			-- (from REFLECTOR_CONSTANTS)

	Reference_type: INTEGER_32 = 1
			-- Abstract type ID for a reference type.
			-- (from REFLECTOR_CONSTANTS)

	Wide_character_type: INTEGER_32 = 12
			-- Abstract type ID for predefined type CHARACTER_32.
			-- Was declared in REFLECTOR_CONSTANTS as synonym of Character_32_type.
			-- (from REFLECTOR_CONSTANTS)
	
feature -- Comparison

	frozen deep_equal (a: detachable ANY; b: like arg #1): BOOLEAN
			-- Are a and b either both void
			-- or attached to isomorphic object structures?
			-- (from ANY)
		do
			if a = Void then
				Result := b = Void
			else
				Result := b /= Void and then a.is_deep_equal (b)
			end
		ensure -- from ANY
			instance_free: class
			shallow_implies_deep: standard_equal (a, b) implies Result
			both_or_none_void: (a = Void) implies (Result = (b = Void))
			same_type: (Result and (a /= Void)) implies (b /= Void and then a.same_type (b))
			symmetric: Result implies deep_equal (b, a)
		end

	frozen equal (a: detachable ANY; b: like arg #1): BOOLEAN
			-- Are a and b either both void or attached
			-- to objects considered equal?
			-- (from ANY)
		do
			if a = Void then
				Result := b = Void
			else
				Result := b /= Void and then a.is_equal (b)
			end
		ensure -- from ANY
			instance_free: class
			definition: Result = (a = Void and b = Void) or else ((a /= Void and b /= Void) and then a.is_equal (b))
		end

	frozen is_deep_equal (other: RT_DBG_CALL_RECORD): BOOLEAN
			-- Are Current and other attached to isomorphic object structures?
			-- (from ANY)
		require -- from ANY
			other_not_void: other /= Void
		external
			"built_in"
		ensure -- from ANY
			shallow_implies_deep: standard_is_equal (other) implies Result
			same_type: Result implies same_type (other)
			symmetric: Result implies other.is_deep_equal (Current)
		end

	is_equal (other: RT_DBG_CALL_RECORD): BOOLEAN
			-- Is other attached to an object considered
			-- equal to current object?
			-- (from ANY)
		require -- from ANY
			other_not_void: other /= Void
		external
			"built_in"
		ensure -- from ANY
			symmetric: Result implies other ~ Current
			consistent: standard_is_equal (other) implies Result
		end

	frozen standard_equal (a: detachable ANY; b: like arg #1): BOOLEAN
			-- Are a and b either both void or attached to
			-- field-by-field identical objects of the same type?
			-- Always uses default object comparison criterion.
			-- (from ANY)
		do
			if a = Void then
				Result := b = Void
			else
				Result := b /= Void and then a.standard_is_equal (b)
			end
		ensure -- from ANY
			instance_free: class
			definition: Result = (a = Void and b = Void) or else ((a /= Void and b /= Void) and then a.standard_is_equal (b))
		end

	frozen standard_is_equal (other: RT_DBG_CALL_RECORD): BOOLEAN
			-- Is other attached to an object of the same type
			-- as current object, and field-by-field identical to it?
			-- (from ANY)
		require -- from ANY
			other_not_void: other /= Void
		external
			"built_in"
		ensure -- from ANY
			same_type: Result implies same_type (other)
			symmetric: Result implies other.standard_is_equal (Current)
		end
	
feature {RT_DBG_EXECUTION_RECORDER, RT_DBG_CALL_RECORD} -- Status report

	has_call_record (c: like Current): BOOLEAN
			-- Is c contained by call_records ?
		require
			c_attached: c /= Void
		do
			Result := attached call_records as crecs and then crecs.has (c)
		end

	is_last_call_record (c: like Current): BOOLEAN
			-- Is c the last call record of Current?
		require
			c_attached: c /= Void
		do
			Result := attached call_records as crecs and then not crecs.is_empty and then crecs.last = c
		end

	parent_has_call_record (c: like Current): BOOLEAN
			-- Is c contained by parent?
		require
			c_attached: c /= Void
		do
			Result := attached parent as p and then p.has_call_record (c)
		end
	
feature -- Status report

	conforms_to (other: ANY): BOOLEAN
			-- Does type of current object conform to type
			-- of other (as per Eiffel: The Language, chapter 13)?
			-- (from ANY)
		require -- from ANY
			other_not_void: other /= Void
		external
			"built_in"
		end

	same_type (other: ANY): BOOLEAN
			-- Is type of current object identical to type of other?
			-- (from ANY)
		require -- from ANY
			other_not_void: other /= Void
		external
			"built_in"
		ensure -- from ANY
			definition: Result = (conforms_to (other) and other.conforms_to (Current))
		end
	
feature -- Duplication

	frozen clone (other: detachable ANY): like other
		obsolete "Use `twin' instead. [2017-05-31]"
			-- Void if other is void; otherwise new object
			-- equal to other
			--
			-- For non-void other, clone calls copy;
			-- to change copying/cloning semantics, redefine copy.
			-- (from ANY)
		do
			if other /= Void then
				Result := other.twin
			end
		ensure -- from ANY
			instance_free: class
			equal: Result ~ other
		end

	copy (other: RT_DBG_CALL_RECORD)
			-- Update current object using fields of object attached
			-- to other, so as to yield equal objects.
			-- (from ANY)
		require -- from ANY
			other_not_void: other /= Void
			type_identity: same_type (other)
		external
			"built_in"
		ensure -- from ANY
			is_equal: Current ~ other
		end

	frozen deep_clone (other: detachable ANY): like other
		obsolete "Use `deep_twin' instead. [2017-05-31]"
			-- Void if other is void: otherwise, new object structure
			-- recursively duplicated from the one attached to other
			-- (from ANY)
		do
			if other /= Void then
				Result := other.deep_twin
			end
		ensure -- from ANY
			instance_free: class
			deep_equal: deep_equal (other, Result)
		end

	frozen deep_copy (other: RT_DBG_CALL_RECORD)
			-- Effect equivalent to that of:
			--		copy (other . deep_twin)
			-- (from ANY)
		require -- from ANY
			other_not_void: other /= Void
		do
			copy (other.deep_twin)
		ensure -- from ANY
			deep_equal: deep_equal (Current, other)
		end

	frozen deep_twin: RT_DBG_CALL_RECORD
			-- New object structure recursively duplicated from Current.
			-- (from ANY)
		external
			"built_in"
		ensure -- from ANY
			deep_twin_not_void: Result /= Void
			deep_equal: deep_equal (Current, Result)
		end

	frozen standard_clone (other: detachable ANY): like other
		obsolete "Use `standard_twin' instead. [2017-05-31]"
			-- Void if other is void; otherwise new object
			-- field-by-field identical to other.
			-- Always uses default copying semantics.
			-- (from ANY)
		do
			if other /= Void then
				Result := other.standard_twin
			end
		ensure -- from ANY
			instance_free: class
			equal: standard_equal (Result, other)
		end

	frozen standard_copy (other: RT_DBG_CALL_RECORD)
			-- Copy every field of other onto corresponding field
			-- of current object.
			-- (from ANY)
		require -- from ANY
			other_not_void: other /= Void
			type_identity: same_type (other)
		external
			"built_in"
		ensure -- from ANY
			is_standard_equal: standard_is_equal (other)
		end

	frozen standard_twin: RT_DBG_CALL_RECORD
			-- New object field-by-field identical to other.
			-- Always uses default copying semantics.
			-- (from ANY)
		external
			"built_in"
		ensure -- from ANY
			standard_twin_not_void: Result /= Void
			equal: standard_equal (Result, Current)
		end

	frozen twin: RT_DBG_CALL_RECORD
			-- New object equal to Current
			-- twin calls copy; to change copying/twinning semantics, redefine copy.
			-- (from ANY)
		external
			"built_in"
		ensure -- from ANY
			twin_not_void: Result /= Void
			is_equal: Result ~ Current
		end
	
feature -- Basic operations

	frozen as_attached: attached RT_DBG_CALL_RECORD
		obsolete "Remove calls to this feature. [2017-05-31]"
			-- Attached version of Current.
			-- (Can be used during transitional period to convert
			-- non-void-safe classes to void-safe ones.)
			-- (from ANY)
		do
			Result := Current
		end

	frozen default: detachable RT_DBG_CALL_RECORD
			-- Default value of object's type
			-- (from ANY)
		do
		end

	frozen default_pointer: POINTER
			-- Default value of type POINTER
			-- (Avoid the need to write p.default for
			-- some p of type POINTER.)
			-- (from ANY)
		do
		ensure -- from ANY
			instance_free: class
		end

	default_rescue
			-- Process exception for routines with no Rescue clause.
			-- (Default: do nothing.)
			-- (from ANY)
		do
		end

	frozen do_nothing
			-- Execute a null action.
			-- (from ANY)
		do
		ensure -- from ANY
			instance_free: class
		end
	
feature {NONE} -- Implementation

	Reflected_object: REFLECTED_REFERENCE_OBJECT
			-- To enable object introspection.
			-- (from RT_DBG_INTERNAL)
		once
			create Result.make (Current)
		end

	Reflector: REFLECTOR
			-- To enable type discovery
			-- (from RT_DBG_INTERNAL)
		once
			create Result
		end
	
feature {NONE} -- Access local

	frozen c_stack_value_at (dep: INTEGER_32; a_loc_type: INTEGER_32; pos: INTEGER_32; a_rt_type: NATURAL_32): detachable ANY
			-- Object value referenced at off offset of object
			-- (from RT_DBG_INTERNAL)
		external
			"C inline use %"eif_debug.h%""
		alias
			"[
				#ifdef WORKBENCH
					return (EIF_REFERENCE) rt_dbg_stack_value((uint32)$dep, (uint32)$a_loc_type, (uint32)$pos, (uint32)$a_rt_type);
				#else
					return NULL;
				#endif
			]"
		end
	
feature -- Change

	register_position (a_line, a_nested: INTEGER_32)
			-- Set last position
		require
			a_line_valid: a_line > 0
			a_nested_valid: a_nested >= 0
		do
			last_position.line := a_line
			last_position.nested := a_nested
			debug ("rt_dbg_record")
				dtrace_indent (depth)
				dtrace ("BP_INFO (" + a_line.out + ", " + a_nested.out + ")%N")
			end
		end

	set_breakable_info (v: like breakable_info)
			-- Set breakable_info
		do
			breakable_info := v
		end

	wipe_out_value_records
			-- Wipe out value records
		local
			n: INTEGER_32
			vs: like value_records
		do
			vs := value_records
			if vs /= Void then
				n := n + vs.count
				value_records := Void
			end
			if object /= Void then
				n := n + 1
				object := Void
			end
			recorder.increment_records_count (- n)
		end
	
feature {RT_DBG_EXECUTION_RECORDER, RT_DBG_CALL_RECORD} -- Change

	add_call_record (c: like Current)
			-- Add call record c to Current's sub call records
		require
			c_attached: c /= Void
			record_parented_to_current: c.parent = Current
			not_flat: not is_flat
			is_ready_to_add_call_record: is_ready_to_add_call_record
		local
			crecs: like call_records
		do
			if attached call_records as ot_crecs then
				crecs := ot_crecs
			else
				create crecs.make (5)
				call_records := crecs
			end
			crecs.force (c)
			crecs.finish
			crecs.move (1)
			register_call_step
			if depth = 0 then
				depth := c.depth - 1
			end
		ensure
			in_records: attached call_records as cr and then cr.has (c) and then cr.after
		end

	add_value_record (v: RT_DBG_VALUE_RECORD)
			-- Add value record
		require
			v_attached: v /= Void
			is_not_flat: not is_flat
			is_ready_to_add_value_record: is_ready_to_add_value_record
		local
			l_value_records: like value_records
		do
			l_value_records := value_records
			if l_value_records = Void then
				create l_value_records.make (5)
				value_records := l_value_records
			end
			v.set_breakable_info (last_position.twin)
			l_value_records.force (v)
			l_value_records.finish
			l_value_records.move (1)
			register_value_step
			recorder.increment_records_count (1)
		ensure
			in_records: attached value_records as vr and then vr.has (v) and then vr.after
		end

	attach_to (p: like Current)
			-- Attach Current call record to parent call record c
		require
			p_attached: p /= Void
			not_in_parent_records: not parent_has_call_record (p)
		do
			parent := p
			p.add_call_record (Current)
			set_breakable_info (p.last_position.twin)
		ensure
			in_parent_records: attached parent as ot_p and then attached {like call_records} ot_p.call_records as cr and then cr.has (Current)
		end

	close
			-- Close current call
			-- It will discard useless records, and flatten sub calls' records.
		require
			is_not_closed: not is_closed
			call_records_closed: call_records_closed
		do
			if recorder.flatten_when_closing then
				flatten_value_records
				optimize_flat_value_records
			end
			rt_information_available := False
			is_closed := True
		ensure
			is_closed: is_closed
		end

	close_call_records
			-- Close sub calls
		require
			is_not_closed: not is_closed
		local
			c: like Current
		do
			if attached call_records as l_calls then
				across
					l_calls.new_cursor.reversed as i
				loop
					c := i.item
					if not c.is_closed then
						c.deep_close
					end
				end
			end
		ensure
			call_records_closed: call_records_closed
		end

	deep_close
			-- Close current call and call_records entries
		require
			is_not_closed: not is_closed
		do
			close_call_records
			close
		ensure
			call_records_closed: call_records_closed
			is_closed: is_closed
		end

	deep_close_until (r: like Current)
			-- Close Current, and all parent calls until call r
		require
			r_attached: r /= Void
			r_not_current: r /= Current
			is_not_closed: not is_closed
		local
			n: detachable like Current
		do
			from
				deep_close
				n := parent
			until
				n = Void or n = r
			loop
				n.deep_close
				n := n.parent
			end
		end

	flatten_value_records
			-- Flatten value records structure
		require
			not_flat: not is_flat
		do
			debug ("rt_dbg_optimization")
				dtrace_indent (depth)
				dtrace ("flatten_value_records (depth=" + depth.out + ") -start-%N")
			end
			if value_records = Void then
				create value_records.make (0)
			end
			if attached value_records as vals then
				get_value_records_flattened_into (vals)
			end
			if not recorder.keep_calls_records then
				call_records := Void
			end
			is_flat := True
			debug ("rt_dbg_optimization")
				dtrace_indent (depth)
				dtrace ("flatten_value_records (depth=" + depth.out + ") -end-%N")
			end
		ensure
			is_flat: is_flat
			flat_value_records_not_void: value_records /= Void
			no_records: not recorder.keep_calls_records implies call_records = Void
		end

	get_value_records_flattened_into (vals: attached like value_records)
			-- Flatten record rec
		require
			vals_attached: vals /= Void
			rec_not_flat_if_current: is_flat implies value_records /= vals
		local
			vrecs: like value_records
			v: RT_DBG_VALUE_RECORD
			c: CURSOR
			n: INTEGER_32
		do
			vrecs := value_records
			if is_flat then
				check
					value_records_not_void_if_flat: vrecs /= Void
				then
					c := vrecs.cursor
					vals.append (vrecs)
					vrecs.go_to (c)
					n := vrecs.count
				end
			else
				if vrecs /= Void then
					if vrecs = vals then
						from
							vals.start
						until
							vals.after
						loop
							v := vals.item
							if v = Void or else v.is_local_record then
								vals.remove
								n := n - 1
							else
								vals.forth
							end
						end
					else
						c := vrecs.cursor
						from
							vrecs.start
						until
							vrecs.after
						loop
							v := vrecs.item
							if v /= Void and then not v.is_local_record then
								vals.extend (v)
								n := n + 1
							end
							vrecs.forth
						end
						vrecs.go_to (c)
					end
				end
				if attached call_records as crecs then
					c := crecs.cursor
					from
						crecs.start
					until
						crecs.after
					loop
						debug ("rt_dbg_warning")
							if not crecs.item_for_iteration.is_flat then
								print ("Rec not flat !!!! %N")
							end
						end
						crecs.item_for_iteration.get_value_records_flattened_into (vals)
						crecs.forth
					end
					crecs.go_to (c)
				end
			end
			if vals = value_records then
				object := Void
				n := n - 1
			else
				wipe_out_value_records
			end
			recorder.increment_records_count (n)
		ensure
			flat_value_records_has_no_local: not flat_value_records_has_local
		end

	optimize_flat_value_records
			-- Optimize the flatten records to discard useless records
		require
			is_flat: is_flat
		local
			ot: ARRAYED_LIST [ANY]
			ort: ARRAY [detachable ARRAYED_LIST [RT_DBG_VALUE_RECORD]]
			orcds: detachable ARRAYED_LIST [RT_DBG_VALUE_RECORD]
			rec: RT_DBG_VALUE_RECORD
			o: detachable ANY
			oi: INTEGER_32
			b: BOOLEAN
			n: INTEGER_32
			retried: BOOLEAN
		do
			if not retried and then attached value_records as vals then
				n := 0
				if vals.count > 1 then
					from
						create ot.make (10)
						create ort.make_filled (Void, 1, ot.capacity - 1)
						vals.start
					until
						vals.after
					loop
						rec := vals.item_for_iteration
						check
							is_not_local_record: not rec.is_local_record
						end
						if attached rec.associated_object as rec_obj then
							if o /= rec_obj then
								o := rec_obj
								ot.search (o)
								if not ot.exhausted then
									oi := ot.index
									orcds := ort.item (oi)
								else
									ot.force (o)
									ot.finish
									oi := ot.index
									create orcds.make (10)
									ort.force (orcds, oi)
								end
							end
							check
								oi_positive: oi > 0
								o_attached: o /= Void
								orcds_attached: orcds /= Void
							then
							end
							if orcds.is_empty then
								orcds.force (rec)
							else
								from
									b := False
									orcds.finish
								until
									orcds.before or b
								loop
									b := orcds.item_for_iteration.position = rec.position
									orcds.back
								end
								if not b then
									orcds.force (rec)
								else
									n := n + 1
								end
							end
						end
						vals.forth
					end
					vals.wipe_out
					from
						ot.start
						oi := ot.index
					until
						ot.after
					loop
						oi := ot.index
						o := ot.item_for_iteration
						orcds := ort.item (oi)
						if orcds /= Void then
							from
								orcds.start
							until
								orcds.after
							loop
								vals.force (orcds.item_for_iteration)
								orcds.forth
							end
						end
						ot.forth
					end
				end
				debug ("rt_dbg_optimization")
					dtrace_indent (depth)
					dtrace ("optimize_flat_value_records (depth=" + depth.out + "): to " + vals.count.out + " (-" + n.out + ")%N")
				end
				recorder.increment_records_count (- n)
			end
		rescue
			dtrace ("Error: optimize_flat_field_records : rescued%N")
			retried := True
			retry
		end

	record_fields
			-- Records fields of target object
		require
			object_not_void: object /= Void
			is_not_flat: not is_flat
		local
			rs: like value_records
		do
			if not is_expanded then
				if attached object as o then
					rs := object_records (o)
				end
				value_records := rs
			end
			debug ("rt_dbg_record")
				if attached {like value_records} rs as ot_rs then
					dtrace_indent (depth)
					dtrace ("record_fields -> " + ot_rs.count.out + " value(s).%N")
					ot_rs.do_all (agent (r: RT_DBG_VALUE_RECORD)
							require
								r_attached: r /= Void
							do
								dtrace (" -> " + r.position.out + ") " + r.to_string + "%N")
							end)
				else
					dtrace_indent (depth)
					dtrace ("record_fields -> None.%N")
				end
			end
		end

	remove_parent
			-- Unattach from parent call record
		do
			parent := Void
		end
	
feature {NONE} -- Change field

	set_field_at (off: INTEGER_32; a_type: NATURAL_32; value: detachable ANY; object: ANY)
			-- (from RT_DBG_INTERNAL)
		require -- from RT_DBG_INTERNAL
			object_attached: object /= Void
		local
			a_eif_type: INTEGER_32
		do
			debug ("rt_dbg_internal")
				print ("set_field_at (" + off.out + ", " + a_type.out + ", value, " + object.generator + ") %N")
			end
			a_eif_type := eif_type (a_type)
			inspect a_eif_type
			when Boolean_type then
				if attached {BOOLEAN} value as bool then
					{ISE_RUNTIME}.set_boolean_field_at (off, $object.to_pointer, 0, bool)
				end
			when Character_8_type then
				if attached {CHARACTER_8} value as c8 then
					{ISE_RUNTIME}.set_character_8_field_at (off, $object.to_pointer, 0, c8)
				end
			when Character_32_type then
				if attached {CHARACTER_32} value as c32 then
					{ISE_RUNTIME}.set_character_32_field_at (off, $object.to_pointer, 0, c32)
				end
			when Natural_8_type then
				if attached {NATURAL_8} value as n8 then
					{ISE_RUNTIME}.set_natural_8_field_at (off, $object.to_pointer, 0, n8)
				end
			when Natural_16_type then
				if attached {NATURAL_16} value as n16 then
					{ISE_RUNTIME}.set_natural_16_field_at (off, $object.to_pointer, 0, n16)
				end
			when Natural_32_type then
				if attached {NATURAL_32} value as n32 then
					{ISE_RUNTIME}.set_natural_32_field_at (off, $object.to_pointer, 0, n32)
				end
			when Natural_64_type then
				if attached {NATURAL_64} value as n64 then
					{ISE_RUNTIME}.set_natural_64_field_at (off, $object.to_pointer, 0, n64)
				end
			when Integer_8_type then
				if attached {INTEGER_8} value as i8 then
					{ISE_RUNTIME}.set_integer_8_field_at (off, $object.to_pointer, 0, i8)
				end
			when Integer_16_type then
				if attached {INTEGER_16} value as i16 then
					{ISE_RUNTIME}.set_integer_16_field_at (off, $object.to_pointer, 0, i16)
				end
			when Integer_32_type then
				if attached {INTEGER_32} value as i32 then
					{ISE_RUNTIME}.set_integer_32_field_at (off, $object.to_pointer, 0, i32)
				end
			when Integer_64_type then
				if attached {INTEGER_64} value as i64 then
					{ISE_RUNTIME}.set_integer_64_field_at (off, $object.to_pointer, 0, i64)
				end
			when Real_32_type then
				if attached {REAL_32} value as r32 then
					{ISE_RUNTIME}.set_real_32_field_at (off, $object.to_pointer, 0, r32)
				end
			when Real_64_type then
				if attached {REAL_64} value as r64 then
					{ISE_RUNTIME}.set_real_64_field_at (off, $object.to_pointer, 0, r64)
				end
			when Pointer_type then
				if attached {POINTER} value as ptr then
					{ISE_RUNTIME}.set_pointer_field_at (off, $object.to_pointer, 0, ptr)
				end
			when Reference_type then
				{ISE_RUNTIME}.set_reference_field_at (off, $object.to_pointer, 0, value)
			else
			end
		end
	
feature {NONE} -- Change local

	frozen c_set_boolean_stack_value (dep: INTEGER_32; a_loc_type: INTEGER_32; pos: INTEGER_32; a_bool: BOOLEAN): INTEGER_32
			-- (from RT_DBG_INTERNAL)
		external
			"C inline use %"eif_debug.h%""
		alias
			"[
				#ifdef WORKBENCH
					EIF_TYPED_VALUE a_val; a_val.type = SK_BOOL; a_val.it_bool = (EIF_BOOLEAN) $a_bool;
					return rt_dbg_set_stack_value ((uint32)$dep, (uint32)$a_loc_type, (uint32)$pos, (EIF_TYPED_VALUE*) &a_val);
				#else
					return 0;
				#endif
			]"
		end

	frozen c_set_character_32_stack_value (dep: INTEGER_32; a_loc_type: INTEGER_32; pos: INTEGER_32; a_ch32: CHARACTER_32): INTEGER_32
			-- (from RT_DBG_INTERNAL)
		external
			"C inline use %"eif_debug.h%""
		alias
			"[
				#ifdef WORKBENCH
					EIF_TYPED_VALUE a_val; a_val.type = SK_WCHAR; a_val.it_c4 = (EIF_WIDE_CHAR) $a_ch32;
					return rt_dbg_set_stack_value ((uint32)$dep, (uint32)$a_loc_type, (uint32)$pos, (EIF_TYPED_VALUE*) &a_val);
				#else
					return 0;
				#endif
			]"
		end

	frozen c_set_character_8_stack_value (dep: INTEGER_32; a_loc_type: INTEGER_32; pos: INTEGER_32; a_ch8: CHARACTER_8): INTEGER_32
			-- (from RT_DBG_INTERNAL)
		external
			"C inline use %"eif_debug.h%""
		alias
			"[
				#ifdef WORKBENCH
					EIF_TYPED_VALUE a_val; a_val.type = SK_CHAR; a_val.it_c1 = (EIF_CHARACTER) $a_ch8;
					return rt_dbg_set_stack_value ((uint32)$dep, (uint32)$a_loc_type, (uint32)$pos, (EIF_TYPED_VALUE*) &a_val);
				#else
					return 0;
				#endif
			]"
		end

	frozen c_set_integer_16_stack_value (dep: INTEGER_32; a_loc_type: INTEGER_32; pos: INTEGER_32; a_i16: INTEGER_16): INTEGER_32
			-- (from RT_DBG_INTERNAL)
		external
			"C inline use %"eif_debug.h%""
		alias
			"[
				#ifdef WORKBENCH
					EIF_TYPED_VALUE a_val; a_val.type = SK_INT16; a_val.it_i2 = (EIF_INTEGER_16) $a_i16;
					return rt_dbg_set_stack_value ((uint32)$dep, (uint32)$a_loc_type, (uint32)$pos, (EIF_TYPED_VALUE*) &a_val);
				#else
					return 0;
				#endif
			]"
		end

	frozen c_set_integer_32_stack_value (dep: INTEGER_32; a_loc_type: INTEGER_32; pos: INTEGER_32; a_i32: INTEGER_32): INTEGER_32
			-- (from RT_DBG_INTERNAL)
		external
			"C inline use %"eif_debug.h%""
		alias
			"[
				#ifdef WORKBENCH
					EIF_TYPED_VALUE a_val; a_val.type = SK_INT32; a_val.it_i4 = (EIF_INTEGER_32) $a_i32;
					return rt_dbg_set_stack_value ((uint32)$dep, (uint32)$a_loc_type, (uint32)$pos, (EIF_TYPED_VALUE*) &a_val);
				#else
					return 0;
				#endif
			]"
		end

	frozen c_set_integer_64_stack_value (dep: INTEGER_32; a_loc_type: INTEGER_32; pos: INTEGER_32; a_i64: INTEGER_64): INTEGER_32
			-- (from RT_DBG_INTERNAL)
		external
			"C inline use %"eif_debug.h%""
		alias
			"[
				#ifdef WORKBENCH
					EIF_TYPED_VALUE a_val; a_val.type = SK_INT64; a_val.it_i8 = (EIF_INTEGER_64) $a_i64;
					return rt_dbg_set_stack_value ((uint32)$dep, (uint32)$a_loc_type, (uint32)$pos, (EIF_TYPED_VALUE*) &a_val);
				#else
					return 0;
				#endif
			]"
		end

	frozen c_set_integer_8_stack_value (dep: INTEGER_32; a_loc_type: INTEGER_32; pos: INTEGER_32; a_i8: INTEGER_8): INTEGER_32
			-- (from RT_DBG_INTERNAL)
		external
			"C inline use %"eif_debug.h%""
		alias
			"[
				#ifdef WORKBENCH
					EIF_TYPED_VALUE a_val; a_val.type = SK_INT8; a_val.it_i1 = (EIF_INTEGER_8) $a_i8;
					return rt_dbg_set_stack_value ((uint32)$dep, (uint32)$a_loc_type, (uint32)$pos, (EIF_TYPED_VALUE*) &a_val);
				#else
					return 0;
				#endif
			]"
		end

	frozen c_set_natural_16_stack_value (dep: INTEGER_32; a_loc_type: INTEGER_32; pos: INTEGER_32; a_n16: NATURAL_16): INTEGER_32
			-- (from RT_DBG_INTERNAL)
		external
			"C inline use %"eif_debug.h%""
		alias
			"[
				#ifdef WORKBENCH
					EIF_TYPED_VALUE a_val; a_val.type = SK_UINT16; a_val.it_n2 = (EIF_NATURAL_16) $a_n16;
					return rt_dbg_set_stack_value ((uint32)$dep, (uint32)$a_loc_type, (uint32)$pos, (EIF_TYPED_VALUE*) &a_val);
				#else
					return 0;
				#endif
			]"
		end

	frozen c_set_natural_32_stack_value (dep: INTEGER_32; a_loc_type: INTEGER_32; pos: INTEGER_32; a_n32: NATURAL_32): INTEGER_32
			-- (from RT_DBG_INTERNAL)
		external
			"C inline use %"eif_debug.h%""
		alias
			"[
				#ifdef WORKBENCH
					EIF_TYPED_VALUE a_val; a_val.type = SK_UINT32; a_val.it_n4 = (EIF_NATURAL_32) $a_n32;
					return rt_dbg_set_stack_value ((uint32)$dep, (uint32)$a_loc_type, (uint32)$pos, (EIF_TYPED_VALUE*) &a_val);
				#else
					return 0;
				#endif
			]"
		end

	frozen c_set_natural_64_stack_value (dep: INTEGER_32; a_loc_type: INTEGER_32; pos: INTEGER_32; a_n64: NATURAL_64): INTEGER_32
			-- (from RT_DBG_INTERNAL)
		external
			"C inline use %"eif_debug.h%""
		alias
			"[
				#ifdef WORKBENCH
					EIF_TYPED_VALUE a_val; a_val.type = SK_UINT64; a_val.it_n8 = (EIF_NATURAL_64) $a_n64;
					return rt_dbg_set_stack_value ((uint32)$dep, (uint32)$a_loc_type, (uint32)$pos, (EIF_TYPED_VALUE*) &a_val);
				#else
					return 0;
				#endif
			]"
		end

	frozen c_set_natural_8_stack_value (dep: INTEGER_32; a_loc_type: INTEGER_32; pos: INTEGER_32; a_n8: NATURAL_8): INTEGER_32
			-- (from RT_DBG_INTERNAL)
		external
			"C inline use %"eif_debug.h%""
		alias
			"[
				#ifdef WORKBENCH
					EIF_TYPED_VALUE a_val; a_val.type = SK_UINT8; a_val.it_n1 = (EIF_NATURAL_8) $a_n8;
					return rt_dbg_set_stack_value ((uint32)$dep, (uint32)$a_loc_type, (uint32)$pos, (EIF_TYPED_VALUE*) &a_val);
				#else
					return 0;
				#endif
			]"
		end

	frozen c_set_pointer_stack_value (dep: INTEGER_32; a_loc_type: INTEGER_32; pos: INTEGER_32; a_p: POINTER): INTEGER_32
			-- (from RT_DBG_INTERNAL)
		external
			"C inline use %"eif_debug.h%""
		alias
			"[
				#ifdef WORKBENCH
					EIF_TYPED_VALUE a_val; a_val.type = SK_POINTER; a_val.it_p = (EIF_POINTER) $a_p;
					return rt_dbg_set_stack_value ((uint32)$dep, (uint32)$a_loc_type, (uint32)$pos, (EIF_TYPED_VALUE*) &a_val);
				#else
					return 0;
				#endif
			]"
		end

	frozen c_set_real_32_stack_value (dep: INTEGER_32; a_loc_type: INTEGER_32; pos: INTEGER_32; a_i32: REAL_32): INTEGER_32
			-- (from RT_DBG_INTERNAL)
		external
			"C inline use %"eif_debug.h%""
		alias
			"[
				#ifdef WORKBENCH
					EIF_TYPED_VALUE a_val; a_val.type = SK_REAL32; a_val.it_r4 = (EIF_REAL_32) $a_i32;
					return rt_dbg_set_stack_value ((uint32)$dep, (uint32)$a_loc_type, (uint32)$pos, (EIF_TYPED_VALUE*) &a_val);
				#else
					return 0;
				#endif
			]"
		end

	frozen c_set_real_64_stack_value (dep: INTEGER_32; a_loc_type: INTEGER_32; pos: INTEGER_32; a_i64: REAL_64): INTEGER_32
			-- (from RT_DBG_INTERNAL)
		external
			"C inline use %"eif_debug.h%""
		alias
			"[
				#ifdef WORKBENCH
					EIF_TYPED_VALUE a_val; a_val.type = SK_REAL64; a_val.it_r8 = (EIF_REAL_64) $a_i64;
					return rt_dbg_set_stack_value ((uint32)$dep, (uint32)$a_loc_type, (uint32)$pos, (EIF_TYPED_VALUE*) &a_val);
				#else
					return 0;
				#endif
			]"
		end

	frozen c_set_reference_stack_value (dep: INTEGER_32; a_loc_type: INTEGER_32; pos: INTEGER_32; a_ref: POINTER): INTEGER_32
			-- (from RT_DBG_INTERNAL)
		require -- from RT_DBG_INTERNAL
			a_ref_not_null: a_ref /= default_pointer
		external
			"C inline use %"eif_debug.h%""
		alias
			"[
				#ifdef WORKBENCH
					EIF_TYPED_VALUE a_val; 
					a_val.type = SK_REF; 
					a_val.it_ref = (EIF_REFERENCE) &($a_ref);
					return rt_dbg_set_stack_value ((uint32)$dep, (uint32)$a_loc_type, (uint32)$pos, (EIF_TYPED_VALUE*) &a_val);
				#else
					return 0;
				#endif
			]"
		end

	frozen c_set_void_stack_value (dep: INTEGER_32; a_loc_type: INTEGER_32; pos: INTEGER_32): INTEGER_32
			-- (from RT_DBG_INTERNAL)
		external
			"C inline use %"eif_debug.h%""
		alias
			"[
				#ifdef WORKBENCH
					EIF_TYPED_VALUE a_val; 
					a_val.type = SK_VOID; 
					a_val.it_ref = (char*) 0;
					return rt_dbg_set_stack_value ((uint32)$dep, (uint32)$a_loc_type, (uint32)$pos, (EIF_TYPED_VALUE*) &a_val);
				#else
					return 0;
				#endif
			]"
		end

	Rt_dlt_argument: INTEGER_32 = 0
			-- DLT=DebugLocalType, the type is an argument of a function
			-- (from RT_DBG_INTERNAL)

	Rt_dlt_localvar: INTEGER_32 = 1
			-- DLT=DebugLocalType, the type is a local variable inside a function
			-- (from RT_DBG_INTERNAL)

	Rt_dlt_result: INTEGER_32 = 2
			-- DLT=DebugLocalType, the type is the Result of the current feature
			-- (from RT_DBG_INTERNAL)

	set_stack_value_at (dep: INTEGER_32; a_loc_type: INTEGER_32; pos: INTEGER_32; a_rt_type: NATURAL_32; value: detachable ANY): INTEGER_32
			-- Set stack value at position pos on stack of depth dep with value
			-- (from RT_DBG_INTERNAL)
		require -- from RT_DBG_INTERNAL
			a_loc_type_valid: a_loc_type = Rt_dlt_localvar or a_loc_type = Rt_dlt_argument or a_loc_type = Rt_dlt_result
		local
			a_eif_type: INTEGER_32
		do
			debug ("rt_dbg_internal")
				print ("set_stack_value_at (dep=" + dep.out + ", loc_type=" + a_loc_type.out + ", pos=" + pos.out + ", type=0x" + a_rt_type.to_hex_string + ", value=")
				if value = Void then
					print ("Void) %N")
				else
					print (value.generating_type.name + ": " + value.out + ") %N")
				end
			end
			a_eif_type := eif_type (a_rt_type)
			inspect a_eif_type
			when Boolean_type then
				if attached {BOOLEAN} value as bool then
					Result := c_set_boolean_stack_value (dep, a_loc_type, pos, bool)
				end
			when Character_8_type then
				if attached {CHARACTER_8} value as c8 then
					Result := c_set_character_8_stack_value (dep, a_loc_type, pos, c8)
				end
			when Character_32_type then
				if attached {CHARACTER_32} value as c32 then
					Result := c_set_character_32_stack_value (dep, a_loc_type, pos, c32)
				end
			when Natural_8_type then
				if attached {NATURAL_8} value as n8 then
					Result := c_set_natural_8_stack_value (dep, a_loc_type, pos, n8)
				end
			when Natural_16_type then
				if attached {NATURAL_16} value as n16 then
					Result := c_set_natural_16_stack_value (dep, a_loc_type, pos, n16)
				end
			when Natural_32_type then
				if attached {NATURAL_32} value as n32 then
					Result := c_set_natural_32_stack_value (dep, a_loc_type, pos, n32)
				end
			when Natural_64_type then
				if attached {NATURAL_64} value as n64 then
					Result := c_set_natural_64_stack_value (dep, a_loc_type, pos, n64)
				end
			when Integer_8_type then
				if attached {INTEGER_8} value as i8 then
					Result := c_set_integer_8_stack_value (dep, a_loc_type, pos, i8)
				end
			when Integer_16_type then
				if attached {INTEGER_16} value as i16 then
					Result := c_set_integer_16_stack_value (dep, a_loc_type, pos, i16)
				end
			when Integer_32_type then
				if attached {INTEGER_32} value as i32 then
					Result := c_set_integer_32_stack_value (dep, a_loc_type, pos, i32)
				end
			when Integer_64_type then
				if attached {INTEGER_64} value as i64 then
					Result := c_set_integer_64_stack_value (dep, a_loc_type, pos, i64)
				end
			when Real_32_type then
				if attached {REAL_32} value as r32 then
					Result := c_set_real_32_stack_value (dep, a_loc_type, pos, r32)
				end
			when Real_64_type then
				if attached {REAL_64} value as r64 then
					Result := c_set_real_64_stack_value (dep, a_loc_type, pos, r64)
				end
			when Pointer_type then
				if attached {POINTER} value as ptr then
					Result := c_set_pointer_stack_value (dep, a_loc_type, pos, ptr)
				end
			when Reference_type then
				if value /= Void then
					Result := c_set_reference_stack_value (dep, a_loc_type, pos, $value.to_pointer)
				else
					Result := c_set_void_stack_value (dep, a_loc_type, pos)
				end
			else
				Result := 2
			end
			debug ("rt_dbg_internal")
				print ("set_stack_value_at (dep=" + dep.out + ", loc_type=" + a_loc_type.out + ", pos=" + pos.out + ", ...) -> " + Result.out + " %N")
				print ("set_stack_value_at: check modification -> ")
				if attached stack_value_at (dep, a_loc_type, pos, a_rt_type) as a then
					print (a.generating_type.name + ": " + a.out + "%N")
				else
					print (" Void %N")
				end
			end
		end
	
feature {NONE} -- External implementation

	frozen c_eif_type (a_field_type: NATURAL_32): INTEGER_32
			-- EIF_ type related to a_field_type
			-- (from RT_DBG_INTERNAL)
		external
			"C inline use %"eif_internal.h%""
		alias
			"ei_eif_type((uint32) $a_field_type)"
		end

	frozen c_object_is_expanded (object: POINTER): BOOLEAN
			-- (from RT_DBG_INTERNAL)
		external
			"C inline use %"eif_eiffel.h%""
		alias
			"eif_is_expanded(HEADER($object)->ov_flags)"
		end

	frozen c_rt_dynamic_type (object: POINTER): INTEGER_32
			-- Dynamic type of object.
			-- (from RT_DBG_INTERNAL)
		external
			"C macro signature (EIF_REFERENCE): EIF_INTEGER use %"eif_macros.h%""
		alias
			"Dtype"
		end

	frozen c_rt_field_type (i: INTEGER_32; a_type_id: INTEGER_32): NATURAL_32
			-- RT field type related to i on a_type_id
			-- (from RT_DBG_INTERNAL)
		external
			"C inline use %"eif_internal.h%""
		alias
			"System(To_dtype($a_type_id)).cn_types[$i]"
		end
	
feature {NONE} -- Factory

	frozen object_attribute_record (off: INTEGER_32; t: NATURAL_32; obj: ANY): detachable RT_DBG_VALUE_RECORD
			-- Record for attribute of type t at offset o on object obj
			-- (from RT_DBG_INTERNAL)
		require -- from RT_DBG_INTERNAL
			obj_attached: obj /= Void
		local
			ft: INTEGER_32
			l_reflected_object: REFLECTED_REFERENCE_OBJECT
		do
			ft := eif_type (t)
			inspect ft
			when Boolean_type then
				create {RT_DBG_ATTRIBUTE_RECORD [BOOLEAN]} Result.make (obj, off, ft, t, {ISE_RUNTIME}.boolean_field_at (off, $obj.to_pointer, 0))
			when Character_8_type then
				create {RT_DBG_ATTRIBUTE_RECORD [CHARACTER_8]} Result.make (obj, off, ft, t, {ISE_RUNTIME}.character_8_field_at (off, $obj.to_pointer, 0))
			when Character_32_type then
				create {RT_DBG_ATTRIBUTE_RECORD [CHARACTER_32]} Result.make (obj, off, ft, t, {ISE_RUNTIME}.character_32_field_at (off, $obj.to_pointer, 0))
			when Integer_8_type then
				create {RT_DBG_ATTRIBUTE_RECORD [INTEGER_8]} Result.make (obj, off, ft, t, {ISE_RUNTIME}.integer_8_field_at (off, $obj.to_pointer, 0))
			when Integer_16_type then
				create {RT_DBG_ATTRIBUTE_RECORD [INTEGER_16]} Result.make (obj, off, ft, t, {ISE_RUNTIME}.integer_16_field_at (off, $obj.to_pointer, 0))
			when Integer_32_type then
				create {RT_DBG_ATTRIBUTE_RECORD [INTEGER_32]} Result.make (obj, off, ft, t, {ISE_RUNTIME}.integer_32_field_at (off, $obj.to_pointer, 0))
			when Integer_64_type then
				create {RT_DBG_ATTRIBUTE_RECORD [INTEGER_64]} Result.make (obj, off, ft, t, {ISE_RUNTIME}.integer_64_field_at (off, $obj.to_pointer, 0))
			when Natural_8_type then
				create {RT_DBG_ATTRIBUTE_RECORD [NATURAL_8]} Result.make (obj, off, ft, t, {ISE_RUNTIME}.natural_8_field_at (off, $obj.to_pointer, 0))
			when Natural_16_type then
				create {RT_DBG_ATTRIBUTE_RECORD [NATURAL_16]} Result.make (obj, off, ft, t, {ISE_RUNTIME}.natural_16_field_at (off, $obj.to_pointer, 0))
			when Natural_32_type then
				create {RT_DBG_ATTRIBUTE_RECORD [NATURAL_32]} Result.make (obj, off, ft, t, {ISE_RUNTIME}.natural_8_field_at (off, $obj.to_pointer, 0).to_natural_32)
			when Natural_64_type then
				create {RT_DBG_ATTRIBUTE_RECORD [NATURAL_64]} Result.make (obj, off, ft, t, {ISE_RUNTIME}.natural_8_field_at (off, $obj.to_pointer, 0).to_natural_64)
			when Real_32_type then
				create {RT_DBG_ATTRIBUTE_RECORD [REAL_32]} Result.make (obj, off, ft, t, {ISE_RUNTIME}.real_32_field_at (off, $obj.to_pointer, 0))
			when Real_64_type then
				create {RT_DBG_ATTRIBUTE_RECORD [REAL_64]} Result.make (obj, off, ft, t, {ISE_RUNTIME}.real_64_field_at (off, $obj.to_pointer, 0))
			when Pointer_type then
				create {RT_DBG_ATTRIBUTE_RECORD [POINTER]} Result.make (obj, off, ft, t, {ISE_RUNTIME}.pointer_field_at (off, $obj.to_pointer, 0))
			when Reference_type then
				create {RT_DBG_ATTRIBUTE_RECORD [ANY]} Result.make (obj, off, ft, t, {ISE_RUNTIME}.reference_field_at (off, $obj.to_pointer, 0))
			when Expanded_type then
				create l_reflected_object.make_for_expanded_field_at (obj, off)
				create {RT_DBG_ATTRIBUTE_RECORD [ANY]} Result.make (obj, off, ft, t, l_reflected_object.object)
			else
			end
		end

	frozen object_local_record (dep: INTEGER_32; pos: INTEGER_32; t: NATURAL_32): detachable RT_DBG_VALUE_RECORD
			-- Local or Result value record.
			-- (from RT_DBG_INTERNAL)
		local
			ft: INTEGER_32
		do
			ft := eif_type (t)
			inspect ft
			when Boolean_type then
				create {RT_DBG_LOCAL_RECORD [BOOLEAN]} Result.make (dep, pos, ft, t)
			when Character_8_type then
				create {RT_DBG_LOCAL_RECORD [CHARACTER_8]} Result.make (dep, pos, ft, t)
			when Character_32_type then
				create {RT_DBG_LOCAL_RECORD [CHARACTER_32]} Result.make (dep, pos, ft, t)
			when Natural_8_type then
				create {RT_DBG_LOCAL_RECORD [NATURAL_8]} Result.make (dep, pos, ft, t)
			when Natural_16_type then
				create {RT_DBG_LOCAL_RECORD [NATURAL_16]} Result.make (dep, pos, ft, t)
			when Natural_32_type then
				create {RT_DBG_LOCAL_RECORD [NATURAL_32]} Result.make (dep, pos, ft, t)
			when Natural_64_type then
				create {RT_DBG_LOCAL_RECORD [NATURAL_64]} Result.make (dep, pos, ft, t)
			when Integer_8_type then
				create {RT_DBG_LOCAL_RECORD [INTEGER_8]} Result.make (dep, pos, ft, t)
			when Integer_16_type then
				create {RT_DBG_LOCAL_RECORD [INTEGER_16]} Result.make (dep, pos, ft, t)
			when Integer_32_type then
				create {RT_DBG_LOCAL_RECORD [INTEGER_32]} Result.make (dep, pos, ft, t)
			when Integer_64_type then
				create {RT_DBG_LOCAL_RECORD [INTEGER_64]} Result.make (dep, pos, ft, t)
			when Real_32_type then
				create {RT_DBG_LOCAL_RECORD [REAL_32]} Result.make (dep, pos, ft, t)
			when Real_64_type then
				create {RT_DBG_LOCAL_RECORD [REAL_64]} Result.make (dep, pos, ft, t)
			when Pointer_type then
				create {RT_DBG_LOCAL_RECORD [POINTER]} Result.make (dep, pos, ft, t)
			when Reference_type then
				create {RT_DBG_LOCAL_RECORD [ANY]} Result.make (dep, pos, ft, t)
			when Expanded_type then
				create {RT_DBG_LOCAL_RECORD [ANY]} Result.make (dep, pos, ft, t)
			when None_type then
			else
			end
			if Result /= Void then
				Result.get_value
			end
		end

	frozen object_record (i: INTEGER_32; obj: ANY): detachable RT_DBG_VALUE_RECORD
			-- (from RT_DBG_INTERNAL)
		require -- from RT_DBG_INTERNAL
			obj_attached: obj /= Void
		local
			ft: INTEGER_32
			l_reflected_object: like Reflected_object
		do
			l_reflected_object := Reflected_object
			l_reflected_object.set_object (obj)
			ft := l_reflected_object.field_type (i)
			Result := object_attribute_record (l_reflected_object.field_offset (i), c_rt_field_type (i, ft), obj)
			inspect ft
			when Integer_8_type then
				create {RT_DBG_FIELD_RECORD [INTEGER_8]} Result.make (obj, i, ft, l_reflected_object.integer_8_field (i))
			when Integer_16_type then
				create {RT_DBG_FIELD_RECORD [INTEGER_16]} Result.make (obj, i, ft, l_reflected_object.integer_16_field (i))
			when Integer_32_type then
				create {RT_DBG_FIELD_RECORD [INTEGER_32]} Result.make (obj, i, ft, l_reflected_object.integer_32_field (i))
			when Integer_64_type then
				create {RT_DBG_FIELD_RECORD [INTEGER_64]} Result.make (obj, i, ft, l_reflected_object.integer_64_field (i))
			when Natural_8_type then
				create {RT_DBG_FIELD_RECORD [NATURAL_8]} Result.make (obj, i, ft, l_reflected_object.natural_8_field (i))
			when Natural_16_type then
				create {RT_DBG_FIELD_RECORD [NATURAL_16]} Result.make (obj, i, ft, l_reflected_object.natural_16_field (i))
			when Natural_32_type then
				create {RT_DBG_FIELD_RECORD [NATURAL_32]} Result.make (obj, i, ft, l_reflected_object.natural_32_field (i))
			when Natural_64_type then
				create {RT_DBG_FIELD_RECORD [NATURAL_64]} Result.make (obj, i, ft, l_reflected_object.natural_64_field (i))
			when Pointer_type then
				create {RT_DBG_FIELD_RECORD [POINTER]} Result.make (obj, i, ft, l_reflected_object.pointer_field (i))
			when Reference_type then
				create {RT_DBG_FIELD_RECORD [detachable ANY]} Result.make (obj, i, ft, l_reflected_object.reference_field (i))
			when Expanded_type then
				create {RT_DBG_FIELD_RECORD [detachable ANY]} Result.make (obj, i, ft, l_reflected_object.field (i))
			when Boolean_type then
				create {RT_DBG_FIELD_RECORD [BOOLEAN]} Result.make (obj, i, ft, l_reflected_object.boolean_field (i))
			when Real_32_type then
				create {RT_DBG_FIELD_RECORD [REAL_32]} Result.make (obj, i, ft, l_reflected_object.real_32_field (i))
			when Real_64_type then
				create {RT_DBG_FIELD_RECORD [REAL_64]} Result.make (obj, i, ft, l_reflected_object.real_64_field (i))
			when Character_8_type then
				create {RT_DBG_FIELD_RECORD [CHARACTER_8]} Result.make (obj, i, ft, l_reflected_object.character_8_field (i))
			when Character_32_type then
				create {RT_DBG_FIELD_RECORD [CHARACTER_32]} Result.make (obj, i, ft, l_reflected_object.character_32_field (i))
			else
			end
		end
	
feature -- Measure

	last_position: TUPLE [line: INTEGER_32; nested: INTEGER_32]
			-- Last position

	rt_information_available: BOOLEAN
			-- Is Runtime information available for this call ?

	same_object_type (ref: detachable ANY): BOOLEAN
			-- Is ref representing the same value as object ?
		do
			if attached ref then
				Result := attached object as o and then o.same_type (ref)
			else
				Result := object = Void
			end
		end
	
feature {NONE} -- Object access

	frozen eif_type (a_field_type: NATURAL_32): INTEGER_32
			-- EIF_ type from field type a_field_type
			-- (from RT_DBG_INTERNAL)
		do
			Result := c_eif_type (a_field_type)
		end

	frozen field_at (off: INTEGER_32; a_field_type: NATURAL_32; object: ANY): detachable ANY
			-- Object attached at offset off field of object
			-- (directly or through a reference)
			-- (from RT_DBG_INTERNAL)
		require -- from RT_DBG_INTERNAL
			object_not_void: object /= Void
			index_large_enough: off >= 1
		local
			t: INTEGER_32
		do
			t := eif_type (a_field_type)
			inspect t
			when Boolean_type then
				Result := {ISE_RUNTIME}.boolean_field_at (off, $object.to_pointer, 0)
			when Character_8_type then
				Result := {ISE_RUNTIME}.character_8_field_at (off, $object.to_pointer, 0)
			when Character_32_type then
				Result := {ISE_RUNTIME}.character_32_field_at (off, $object.to_pointer, 0)
			when Natural_8_type then
				Result := {ISE_RUNTIME}.natural_8_field_at (off, $object.to_pointer, 0)
			when Natural_16_type then
				Result := {ISE_RUNTIME}.natural_16_field_at (off, $object.to_pointer, 0)
			when Natural_32_type then
				Result := {ISE_RUNTIME}.natural_32_field_at (off, $object.to_pointer, 0)
			when Natural_64_type then
				Result := {ISE_RUNTIME}.natural_64_field_at (off, $object.to_pointer, 0)
			when Integer_8_type then
				Result := {ISE_RUNTIME}.integer_8_field_at (off, $object.to_pointer, 0)
			when Integer_16_type then
				Result := {ISE_RUNTIME}.integer_16_field_at (off, $object.to_pointer, 0)
			when Integer_32_type then
				Result := {ISE_RUNTIME}.integer_32_field_at (off, $object.to_pointer, 0)
			when Integer_64_type then
				Result := {ISE_RUNTIME}.integer_64_field_at (off, $object.to_pointer, 0)
			when Real_32_type then
				Result := {ISE_RUNTIME}.real_32_field_at (off, $object.to_pointer, 0)
			when Real_64_type then
				Result := {ISE_RUNTIME}.real_64_field_at (off, $object.to_pointer, 0)
			when Pointer_type then
				Result := {ISE_RUNTIME}.pointer_field_at (off, $object.to_pointer, 0)
			when Reference_type then
				Result := {ISE_RUNTIME}.reference_field_at (off, $object.to_pointer, 0)
			else
			end
		end

	frozen field_index_at (off: INTEGER_32; obj: ANY): INTEGER_32
			-- Field name at offset off on obj
			-- (from RT_DBG_INTERNAL)
		require -- from RT_DBG_INTERNAL
				obj /= Void
		local
			n: INTEGER_32
			l_reflected_object: like Reflected_object
		do
			from
				l_reflected_object := Reflected_object
				l_reflected_object.set_object (obj)
				n := l_reflected_object.field_count
			until
				n = 0 or Result > 0
			loop
				if off = l_reflected_object.field_offset (n) then
					Result := n
				end
				n := n - 1
			end
		end

	frozen field_name_at (off: INTEGER_32; obj: ANY): detachable STRING_8
			-- Field name at offset off on obj
			-- (from RT_DBG_INTERNAL)
		require -- from RT_DBG_INTERNAL
				obj /= Void
		local
			i: INTEGER_32
		do
			i := field_index_at (off, obj)
			if i > 0 then
				Reflected_object.set_object (obj)
				Result := Reflected_object.field_name (i)
			end
		end

	frozen object_field_count (obj: ANY): INTEGER_32
			-- Field_count on obj
			-- (from RT_DBG_INTERNAL)
		require -- from RT_DBG_INTERNAL
			obj_attached: obj /= Void
		do
			Reflected_object.set_object (obj)
			Result := Reflected_object.field_count
		end

	frozen object_is_expanded (object: ANY): BOOLEAN
			-- Is object an expanded value ?
			-- (from RT_DBG_INTERNAL)
		require -- from RT_DBG_INTERNAL
			object_not_void: object /= Void
		do
			Result := c_object_is_expanded ($object.to_pointer)
		end

	frozen object_records (obj: ANY): detachable ARRAYED_LIST [RT_DBG_VALUE_RECORD]
			-- List of field records on obj
			-- (from RT_DBG_INTERNAL)
		require -- from RT_DBG_INTERNAL
			obj_attached: obj /= Void
		local
			i, cnb: INTEGER_32
			l_records: like object_records
		do
			cnb := object_field_count (obj)
			if cnb > 0 then
				create l_records.make (cnb)
				from
					i := 1
				until
					i > cnb
				loop
					if attached {like object_record} object_record (i, obj) as r then
						l_records.extend (r)
					end
					i := i + 1
				end
				Result := l_records
			end
		end

	frozen rt_dynamic_type (object: ANY): INTEGER_32
			-- Dynamic type of object
			-- (from RT_DBG_INTERNAL)
		require -- from RT_DBG_INTERNAL
			object_not_void: object /= Void
		do
			Result := c_rt_dynamic_type ($object.to_pointer)
		ensure -- from RT_DBG_INTERNAL
			rt_dynamic_type_nonnegative: Result >= 0
		end

	frozen stack_value_at (dep: INTEGER_32; a_loc_type: INTEGER_32; pos: INTEGER_32; a_rt_type: NATURAL_32): detachable ANY
			-- Object attached at offset off field of object
			-- (directly or through a reference)
			-- (from RT_DBG_INTERNAL)
		require -- from RT_DBG_INTERNAL
			index_large_enough: pos >= 1
		do
			debug ("rt_dbg_internal")
				print ("%Nstack_value_at (" + dep.out + ", " + pos.out + ", 0x" + a_rt_type.to_hex_string + ")%N")
			end
			Result := c_stack_value_at (dep, a_loc_type, pos, a_rt_type)
			debug ("rt_dbg_internal")
				print ("stack_value_at -> ")
				if Result /= Void then
					print (Result.generating_type.name + " = " + Result.out)
				else
					print ("Void Result")
				end
				print ("%N")
			end
		end
	
feature -- Output

	Io: STD_FILES
			-- Handle to standard file setup
			-- (from ANY)
		once
			create Result
			Result.set_output_default
		ensure -- from ANY
			instance_free: class
			io_not_void: Result /= Void
		end

	out: STRING_8
			-- New string containing terse printable representation
			-- of current object
			-- (from ANY)
		do
			Result := tagged_out
		ensure -- from ANY
			out_not_void: Result /= Void
		end

	print (o: detachable ANY)
			-- Write terse external representation of o
			-- on standard output.
			-- (from ANY)
		do
			if o /= Void then
				Io.put_string (o.out)
			end
		ensure -- from ANY
			instance_free: class
		end

	frozen tagged_out: STRING_8
			-- New string containing terse printable representation
			-- of current object
			-- (from ANY)
		external
			"built_in"
		ensure -- from ANY
			tagged_out_not_void: Result /= Void
		end
	
feature -- Platform

	Operating_environment: OPERATING_ENVIRONMENT
			-- Objects available from the operating system
			-- (from ANY)
		once
			create Result
		ensure -- from ANY
			instance_free: class
			operating_environment_not_void: Result /= Void
		end
	
feature -- Properties

	breakable_info: detachable TUPLE [line: INTEGER_32; nested: INTEGER_32]
			-- Breakable info when call occurred.

	call_records: detachable ARRAYED_LIST [like Current]
			-- Sub call records.

	class_type_id: INTEGER_32
			-- Related written class type id.

	depth: INTEGER_32
			-- Call stack depth of Current's call

	dynamic_class_type_id: INTEGER_32
			-- Related dynamic class type id.
		do
			if attached {ANY} object as o then
				Result := rt_dynamic_type (o)
			end
		end

	feature_rout_id: INTEGER_32
			-- Related feature routine id.

	flat_value_records_has_local: BOOLEAN
			-- Does value_records has local values ?
		require
			is_flat: is_flat
		do
			if attached value_records as vals then
				Result := across
					vals as c
				some
					c.item.is_local_record
				end
			end
		end

	object: detachable ANY
			-- Target object.

	parent: detachable like Current
			-- Parent's call record.

	steps: ARRAYED_LIST [BOOLEAN]
			-- Steps data

	value_records: detachable ARRAYED_LIST [RT_DBG_VALUE_RECORD]
			-- Recorded values (assignment...)
	
feature {RT_DBG_EXECUTION_RECORDER, RT_DBG_CALL_RECORD} -- Query

	associated_replayable_call: detachable like Current
			-- Associated replayable call
		do
			if rt_information_available then
				Result := Current
			elseif attached parent as p then
				Result := p.associated_replayable_call
			end
		ensure
			result_not_void: Result /= Void and then Result.rt_information_available
		end

	available_calls_to_bottom: INTEGER_32
			-- Number of available calls to reach the bottom record.
		do
			if attached parent as p then
				Result := p.available_calls_to_bottom
			end
			Result := Result + 1
		end

	bottom: like Current
			-- Bottom's call record.
		do
			Result := Current
			if attached parent as p then
				Result := p.bottom
			end
		ensure
			result_attached: Result /= Void
		end

	call_by_id (a_id: STRING_8): detachable like Current
		require
			a_id_not_empty: a_id.count > 0
		local
			p: INTEGER_32
			i: INTEGER_32
			r: like Current
			sub_id: detachable STRING_8
		do
			debug ("rt_dbg_replay")
				dtrace_indent (depth)
				dtrace ("call_by_id (" + a_id + ")%N")
			end
			p := a_id.index_of ('.', 1)
			if p > 0 then
				sub_id := a_id.substring (p + 1, a_id.count)
				i := a_id.substring (1, p - 1).to_integer_32
			else
				i := a_id.to_integer_32
			end
			if attached call_records as crecs and then crecs.valid_index (i) then
				r := crecs.i_th (i)
				if sub_id = Void then
					Result := r
				else
					Result := r.call_by_id (sub_id)
				end
			end
			debug ("rt_dbg_replay")
				dtrace_indent (depth)
				dtrace ("call_by_id (" + a_id + ") -> Result=")
				if Result = Void then
					dtrace ("Void")
				else
					dtrace (Result.to_string (0))
				end
				dtrace ("%N")
			end
		end

	is_ready_to_add_call_record: BOOLEAN
			-- Is Current's structures in valid context to add call record?
		do
			Result := attached call_records as crecs implies crecs.after
		end

	is_ready_to_add_value_record: BOOLEAN
			-- Is Current's structures in valid context to add value record?
		do
			Result := attached value_records as vrecs implies vrecs.after
		end

	record_count_but (c: detachable like Current): INTEGER_32
			-- Number of records contained by Current and sub calls
			-- apart from the records contained by c (and sub calls)
		local
			r: like Current
			p: CURSOR
		do
			if is_flat then
				if attached value_records as ffr then
					Result := ffr.count
				end
			else
				if attached value_records as vrs then
					Result := vrs.count
				end
				if attached call_records as crs then
					p := crs.cursor
					from
						crs.start
					until
						crs.after
					loop
						r := crs.item_for_iteration
						if r /= c then
							Result := Result + r.record_count_but (Void)
						end
						crs.forth
					end
					crs.go_to (p)
				end
			end
			if object /= Void then
				Result := Result + 1
			end
		end

	to_string (a_level: INTEGER_32): STRING_8
			-- String representation of Current
		local
			subs: detachable STRING_8
			at_subs: STRING_8
			l_steps: like steps
			i: INTEGER_32
			val_cursor: detachable CURSOR
			call_cursor: detachable CURSOR
			c, v: INTEGER_32
			l_calls: like call_records
			l_values: like value_records
		do
			create Result.make (5)
			Result.append_character ('[')
			Result.append_integer (depth)
			Result.append_character ('.')
			Result.append_integer (dynamic_class_type_id)
			Result.append_character ('.')
			Result.append_integer (class_type_id)
			Result.append_character ('.')
			Result.append_integer (feature_rout_id)
			Result.append_character ('.')
			if attached breakable_info as bi then
				Result.append_integer (bi.line)
				Result.append_character ('.')
				Result.append_integer (bi.nested)
			else
				Result.append_integer (0)
				Result.append_character ('.')
				Result.append_integer (0)
			end
			if is_replaying and then attached replayed_position as rbi then
				Result.append_character ('.')
				Result.append_integer (rbi.line)
				Result.append_character ('.')
				Result.append_integer (rbi.nested)
			end
			Result.append_character ('%T')
			if is_flat then
				Result.append_character ('#')
			end
			if not rt_information_available then
				Result.append_character ('?')
			end
			l_values := value_records
			l_calls := call_records
			c := 0
			v := 0
			if a_level = 0 then
				if l_calls /= Void then
					c := l_calls.count
				end
			else
				l_steps := steps
				if l_steps.count > 0 and then attached {CURSOR} l_steps.cursor as steps_cursor then
					create at_subs.make_empty
					subs := at_subs
					from
						if l_values /= Void then
							val_cursor := l_values.cursor
							l_values.start
						end
						if l_calls /= Void then
							call_cursor := l_calls.cursor
							l_calls.start
						end
						i := l_steps.index
						l_steps.start
					until
						l_steps.after
					loop
						if l_steps.item then
							v := v + 1
						else
							if l_calls = Void then
							else
								if l_steps.index = i then
									at_subs.append_character ('!')
								end
								at_subs.append_string (l_calls.item.to_string (a_level - 1))
								l_calls.move (1)
							end
							c := c + 1
						end
						l_steps.forth
					end
					if l_values /= Void and then val_cursor /= Void then
						l_values.go_to (val_cursor)
						check
								v = l_values.count
						end
					end
					if l_calls /= Void and then call_cursor /= Void then
						l_calls.go_to (call_cursor)
						check
								c = l_calls.count
						end
					end
					l_steps.go_to (steps_cursor)
				end
			end
			if c > 0 then
				Result.append_character ('+')
				Result.append_integer (c)
				Result.append_character ('(')
				if subs /= Void then
					Result.append_string (subs)
				end
				Result.append_character (')')
			end
			Result.append_character (']')
		end
	
feature {NONE} -- Query

	changes_between (csr1: RT_DBG_CALL_RECORD; csr2: detachable RT_DBG_CALL_RECORD): ARRAYED_LIST [RT_DBG_VALUE_RECORD]
			-- Return records from r1 to -beginning-of- r2.
			-- (from RT_DBG_COMMON)
		require -- from RT_DBG_COMMON
			csr1_not_void: csr1 /= Void
		local
			chgs: like changes_between
			c, v: CURSOR
			r: detachable like changes_between
		do
			if csr1.is_flat then
				r := csr1.value_records
			end
			if r /= Void then
				Result := r
			else
				create Result.make (30)
				if attached csr1.value_records as vrecs then
					v := vrecs.cursor
					Result.append (vrecs)
					vrecs.go_to (v)
				end
				if attached csr1.call_records as crecs then
					c := crecs.cursor
					from
						crecs.start
					until
						crecs.after or crecs.item_for_iteration = csr2
					loop
						chgs := changes_between (crecs.item_for_iteration, csr2)
						if chgs /= Void then
							Result.append (chgs)
						end
						crecs.forth
					end
					crecs.go_to (c)
				end
			end
		ensure -- from RT_DBG_COMMON
			result_not_void: Result /= Void
		end
	
feature {NONE} -- Retrieval

	frozen internal_correct_mismatch
			-- Called from runtime to perform a proper dynamic dispatch on correct_mismatch
			-- from MISMATCH_CORRECTOR.
			-- (from ANY)
		local
			l_msg: STRING_8
			l_exc: EXCEPTIONS
		do
			if attached {MISMATCH_CORRECTOR} Current as l_corrector then
				l_corrector.correct_mismatch
			else
				create l_msg.make_from_string ("Mismatch: ")
				create l_exc
				l_msg.append (generating_type.name)
				l_exc.raise_retrieval_exception (l_msg)
			end
		end
	
feature -- Status

	call_records_closed: BOOLEAN
			-- Is call_records entries closed?
		require
			is_not_closed: not is_closed
		do
			if attached call_records as l_calls then
				Result := across
					l_calls.new_cursor.reversed as c
				all
					c.item.is_closed
				end
			else
				Result := True
			end
		end

	is_closed: BOOLEAN
			-- Is Current record closed ?

	is_expanded: BOOLEAN
			-- Is object an expanded value ?

	is_flat: BOOLEAN
			-- Is Current record flat ?
	
feature {RT_DBG_EXECUTION_RECORDER} -- Steps

	is_replaying: BOOLEAN
			-- Is currently replaying ?
		do
			Result := recorder.is_replaying
		end

	left_step: detachable ARRAYED_LIST [RT_DBG_VALUE_RECORD]
			-- Record between current and previous step
		require
			is_replaying: is_replaying
		local
			l_steps: like steps
		do
			l_steps := steps
			debug ("rt_dbg_replay")
				debug_display_steps
			end
			l_steps.move (-1)
			debug ("rt_dbg_replay")
				dtrace_indent (depth)
				dtrace ("left_step -> ")
				dtrace ("[" + l_steps.index.out + "/" + l_steps.count.out + "]: ")
			end
			if not l_steps.before then
				if l_steps.item then
					check
						value_records_attached: value_records /= Void
					end
					if attached value_records as vrecs then
						vrecs.move (-1)
						create Result.make (1)
						check
							value_records_not_before: not vrecs.before
						end
						Result.force (vrecs.item)
						debug ("rt_dbg_replay")
							dtrace ("VALUE ")
							dtrace (vrecs.index.out + "/" + vrecs.count.out)
						end
					end
				else
					check
						call_records_attached: call_records /= Void
					end
					if attached call_records as crecs then
						crecs.move (-1)
						debug ("rt_dbg_replay")
							dtrace ("CALL ")
							dtrace (crecs.index.out + "/" + crecs.count.out)
						end
						check
							call_records_not_before: not crecs.before
						end
						Result := changes_between (crecs.item, Void)
					end
				end
			end
			debug ("rt_dbg_replay")
				if Result = Void then
					dtrace ("=> Void %N")
				else
					dtrace ("=> " + Result.count.out + " %N")
				end
			end
		ensure
			value_records_cursor_valid: attached value_records as vrecs2 implies not vrecs2.before
			call_records_cursor_valid: attached call_records as crecs2 implies not crecs2.before
			steps_before_implies_record_first: steps.before implies ((not attached value_records as vrecs3 or else vrecs3.isfirst) and (not attached call_records as crecs3 or else crecs3.isfirst))
		end

	replayed_position: like last_position
			-- Replayed position
		require
			is_replaying: is_replaying
		local
			l_steps: like steps
			rpos: detachable like last_position
		do
			l_steps := steps
			if l_steps.after then
				rpos := last_position
			elseif l_steps.before then
				rpos := [0, 0]
			else
				if l_steps.item then
					check
						value_records_attached: value_records /= Void
					end
					if attached value_records as vrecs then
						rpos := vrecs.item.breakable_info
					end
				else
					check
						call_records_attached: call_records /= Void
					end
					if attached call_records as crecs then
						rpos := crecs.item.breakable_info
					end
				end
			end
			if attached {like replayed_position} rpos as ot_rpos then
				Result := ot_rpos
			else
				Result := [0, 0]
			end
		end

	replayed_position_is_first: BOOLEAN
			-- Replayed position is first
		require
			is_replaying: is_replaying
		do
			Result := steps.isfirst or steps.before
		end

	revert_left_step
			-- Revert previous left step
		require
			is_replaying: is_replaying
			steps_not_after: not steps.after
		local
			l_steps: like steps
		do
			l_steps := steps
			debug ("rt_dbg_replay")
				dtrace_indent (depth)
				dtrace ("revert_left_step -start-%N")
				debug_display_steps
			end
			if l_steps.before then
				l_steps.move (1)
			else
				if not l_steps.after then
					if l_steps.item then
						check
							value_records_attached: value_records /= Void
						end
						if attached value_records as vrecs then
							check
									not vrecs.after
							end
							vrecs.move (1)
						end
					else
						check
							call_records_attached: call_records /= Void
						end
						if attached call_records as crecs then
							check
									not crecs.after
							end
							crecs.move (1)
						end
					end
				end
				l_steps.move (1)
			end
			debug ("rt_dbg_replay")
				dtrace_indent (depth)
				dtrace ("revert_left_step -end-%N")
			end
		ensure
				steps.after implies (attached call_records as crecs2 implies crecs2.after) and (attached value_records as vrecs2 implies vrecs2.after)
		end
	
feature {NONE} -- Steps implementation

	register_call_step
			-- Register a call step
		require
			not_is_flat: not is_flat
		do
			debug ("rt_dbg_record")
				dtrace_indent (depth)
				dtrace (depth.out + " -> register_call_step @" + last_position.line.out + " %N")
			end
			register_step (False)
		ensure
			steps_is_after: steps.after
		end

	register_step (b: BOOLEAN)
			-- Register a step
		require
			not_is_flat: not is_flat
		local
			l_steps: like steps
		do
			l_steps := steps
			l_steps.force (b)
			l_steps.finish
			l_steps.move (1)
		ensure
			steps_is_after: steps.after
		end

	register_value_step
			-- Register a value step
		require
			not_is_flat: not is_flat
		do
			debug ("rt_dbg_record")
				dtrace_indent (depth)
				dtrace (depth.out + " -> register_value_step @" + last_position.line.out + " %N")
			end
			register_step (True)
		ensure
			steps_is_after: steps.after
		end
	
feature {NONE} -- Testing

	c_rt_set_is_inside_rt_eiffel_code (v: INTEGER_32)
			-- (from RT_DBG_INTERNAL)
		external
			"C inline use %"eif_debug.h%""
		alias
			"[
				#ifdef WORKBENCH
					EIF_GET_CONTEXT; is_inside_rt_eiffel_code = $v;
				#endif
			]"
		end

	test_locals (dep: INTEGER_32; loc_pos: INTEGER_32; val: ANY; a_rt_type: NATURAL_32)
			-- (from RT_DBG_INTERNAL)
		local
			s: STRING_8
			retried: BOOLEAN
		do
			if not retried then
				c_rt_set_is_inside_rt_eiffel_code (1)
				s := "----------------------------------%N"
				s.append ("Loc #" + loc_pos.out + "(stack depth=" + dep.out + ")")
				if val /= Void then
					s.append (": should be " + val.generating_type.name)
				end
				s.append ("%N")
				print (s)
				s.append (" -> ")
				if attached stack_value_at (dep, Rt_dlt_localvar, loc_pos, a_rt_type) as a then
					s.append (a.generating_type.name + "=" + a.out)
				else
					s.append ("Void object")
				end
				s.append ("%N")
				print (s)
				c_rt_set_is_inside_rt_eiffel_code (0)
			else
				print ("Rescued%N")
				c_rt_set_is_inside_rt_eiffel_code (0)
			end
		rescue
			retried := True
			retry
		end

	test_set_local (dep: INTEGER_32; loc_pos: INTEGER_32; val: ANY; a_rt_type: NATURAL_32)
			-- (from RT_DBG_INTERNAL)
		local
			s: STRING_8
			r: INTEGER_32
			retried: BOOLEAN
		do
			if not retried then
				c_rt_set_is_inside_rt_eiffel_code (1)
				s := "----------------------------------%N"
				s.append ("SetLoc #" + loc_pos.out + "(stack depth=" + dep.out + ")")
				if val /= Void then
					s.append (": value " + val.generating_type.name)
				else
					s.append (": value Void")
				end
				s.append ("%N")
				print (s)
				r := set_stack_value_at (dep, Rt_dlt_localvar, loc_pos, a_rt_type, val)
				s.append (" -> ")
				s.append ("Result = " + r.out)
				s.append ("%N")
				print (s)
				c_rt_set_is_inside_rt_eiffel_code (0)
			else
				print ("Rescued%N")
				c_rt_set_is_inside_rt_eiffel_code (0)
			end
		rescue
			retried := True
			retry
		end
	
feature {NONE} -- Trace

	dtrace (m: STRING_8)
			-- note: might be be removed with 6.2	
			-- (from RT_EXTENSION_COMMON)
		require -- from RT_EXTENSION_COMMON
			m_attached: m /= Void
		do
			Io.Error.put_string (m)
		end

	dtrace_indent (n: INTEGER_32)
			-- note: might be removed with 6.2
			-- (from RT_EXTENSION_COMMON)
		do
			Io.Error.put_string (create {STRING_8}.make_filled (' ', 2 * n))
		end
	
feature -- debug

	debug_display_steps
			-- Display steps for debugging purpose.
		local
			l_steps: like steps
			i: INTEGER_32
			v, c: INTEGER_32
			val_cursor: detachable CURSOR
			call_cursor: detachable CURSOR
			l_values: like value_records
			l_calls: like call_records
		do
			l_steps := steps
			l_values := value_records
			l_calls := call_records
			if attached {CURSOR} l_steps.cursor as steps_cursor then
				from
					i := l_steps.index
					v := 0
					c := 0
					l_steps.start
					print ("steps: " + i.out + " out of " + l_steps.count.out + "%N")
					if l_values /= Void then
						val_cursor := l_values.cursor
						print ("%Tvalues: " + l_values.index.out + " out of " + l_values.count.out + "%N")
						l_values.start
					else
						print ("%Tvalues: None %N")
					end
					if l_calls /= Void then
						call_cursor := l_calls.cursor
						print ("%Tcalls: " + l_calls.index.out + " out of " + l_calls.count.out + "%N")
						l_calls.start
					else
						print ("%Tcalls: None %N")
					end
				until
					l_steps.after
				loop
					print ("%T" + l_steps.index.out + "=")
					if l_steps.item then
						v := v + 1
						print ("VALUE#" + v.out + ": ")
						if l_values = Void then
							print ("None")
						else
							print (l_values.item.to_string)
							l_values.move (1)
						end
					else
						c := c + 1
						print ("CALL#" + c.out + ": ")
						if l_calls = Void then
							print ("None")
						else
							print (l_calls.item.to_string (0))
							l_calls.move (1)
						end
					end
					if i = l_steps.index then
						print (" <- ")
					end
					print ("%N")
					l_steps.forth
				end
				if l_values /= Void and val_cursor /= Void then
					l_values.go_to (val_cursor)
				end
				if l_calls /= Void and then call_cursor /= Void then
					l_calls.go_to (call_cursor)
				end
				l_steps.go_to (steps_cursor)
			end
		end

	debug_output: STRING_8
			-- Debug output as string representation.
		local
			tn: STRING_8
		do
			tn := Reflector.type_name_of_type (class_type_id)
			if attached object as o and then attached {STRING_8} o.generating_type as otn then
				if tn = Void then
					tn := otn
				elseif otn /~ tn then
					tn := otn + " from " + tn
				end
			end
			if tn = Void then
				tn := "_"
			end
			Result := "{" + tn + "}."
			Result.append (feature_rout_id.out + " <" + depth.out + ">")
			if attached breakable_info as bi then
				Result.append_character (' ')
				Result.append_character ('(')
				Result.append_integer (bi.line)
				Result.append_character (',')
				Result.append_integer (bi.nested)
				Result.append_character (')')
				Result.append_character (' ')
			end
			if is_flat then
				Result.append_character ('&')
			end
			if attached object as obj and then rt_dynamic_type (obj) /= class_type_id then
				Result.append_string (" -> ERROR Dtype(obj):" + rt_dynamic_type (obj).out + " /= " + class_type_id.out)
			end
		ensure -- from DEBUG_OUTPUT
			result_not_void: Result /= Void
		end
	
invariant
	recorder_attached: recorder /= Void
	steps_attached: steps /= Void
	last_position_attached: last_position /= Void
	non_empty_call_records: attached call_records as crecs implies not crecs.is_empty
	value_records_not_void_if_flat: is_flat implies value_records /= Void

		-- from ANY
	reflexive_equality: standard_is_equal (Current)
	reflexive_conformance: conforms_to (Current)

note
	library: "EiffelBase: Library of reusable components for Eiffel."
	copyright: "Copyright (c) 1984-2018, Eiffel Software and others"
	license: "Eiffel Forum License v2 (see http://www.eiffel.com/licensing/forum.txt)"
	source: "[
		Eiffel Software
		5949 Hollister Ave., Goleta, CA 93117 USA
		Telephone 805-685-1006, Fax 805-685-6869
		Website http://www.eiffel.com
		Customer support http://support.eiffel.com
	]"

end -- class RT_DBG_CALL_RECORD