import semantize
private import parser::tables
import mixin
+import primitive_types
redef class ToolContext
# --discover-call-trace
init
do
- self.true_instance = new PrimitiveInstance[Bool](mainmodule.bool_type, true)
- init_instance_primitive(self.true_instance)
- self.false_instance = new PrimitiveInstance[Bool](mainmodule.bool_type, false)
- init_instance_primitive(self.false_instance)
- self.null_instance = new MutableInstance(mainmodule.model.null_type)
+ if mainmodule.model.get_mclasses_by_name("Bool") != null then
+ self.true_instance = new PrimitiveInstance[Bool](mainmodule.bool_type, true)
+ init_instance_primitive(self.true_instance)
+ self.false_instance = new PrimitiveInstance[Bool](mainmodule.bool_type, false)
+ init_instance_primitive(self.false_instance)
+ end
+ self.null_instance = new PrimitiveInstance[nullable Object](mainmodule.model.null_type, null)
end
# Starts the interpreter on the main module of a program
# Subtype test in the context of the mainmodule
fun is_subtype(sub, sup: MType): Bool
do
- return sub.is_subtype(self.mainmodule, self.frame.arguments.first.mtype.as(MClassType), sup)
+ return sub.is_subtype(self.mainmodule, current_receiver_class, sup)
end
+ # Get a primitive method in the context of the main module
fun force_get_primitive_method(name: String, recv: MType): MMethod
do
assert recv isa MClassType
- return self.modelbuilder.force_get_primitive_method(self.frame.current_node, name, recv.mclass, self.mainmodule)
+ return self.modelbuilder.force_get_primitive_method(current_node, name, recv.mclass, self.mainmodule)
end
# Is a return executed?
# Set this mark to skip the evaluation until the end of the specified method frame
- var returnmark: nullable Frame = null
+ var returnmark: nullable FRAME = null
# Is a break or a continue executed?
# Set this mark to skip the evaluation until a labeled statement catch it with `is_escape`
# If `n` cannot be evaluated, then aborts.
fun stmt(n: nullable AExpr)
do
- if n != null then
- var frame = self.frame
- var old = frame.current_node
- frame.current_node = n
- #n.debug("Execute stmt")
- n.stmt(self)
- frame.current_node = old
+ if n == null then return
+
+ if n.comprehension != null then
+ var comprehension = frame.comprehension.as(not null)
+ var i = expr(n)
+ if i != null then comprehension.add(i)
+ return
end
+
+ var frame = self.frame
+ var old = frame.current_node
+ frame.current_node = n
+ n.stmt(self)
+ frame.current_node = old
end
# Map used to store values of nodes that must be evaluated once in the system (`AOnceExpr`)
return res
end
+ # Return a instance associated to a primitive class
+ # Current primitive classes are `Int`, `Bool`, and `String`
fun value_instance(object: Object): Instance
do
if object isa Int then
return res
end
+ # The virtual type of the frames used in the execution engine
+ type FRAME: Frame
+
# The current frame used to store local variables of the current method executed
- fun frame: Frame do return frames.first
+ fun frame: FRAME do return frames.first
# The stack of all frames. The first one is the current one.
- var frames = new List[Frame]
+ var frames = new List[FRAME]
# Return a stack trace. One line per function
fun stack_trace: String
return b.to_s
end
+ # The current node, used to print errors, debug and stack-traces
+ fun current_node: nullable ANode
+ do
+ if frames.is_empty then return null
+ return frames.first.current_node
+ end
+
+ # The dynamic type of the current `self`
+ fun current_receiver_class: MClassType
+ do
+ return frames.first.arguments.first.mtype.as(MClassType)
+ end
+
# Exit the program with a message
fun fatal(message: String)
do
- if frames.is_empty then
+ var node = current_node
+ if node == null then
print message
else
- self.frame.current_node.fatal(self, message)
+ node.fatal(self, message)
end
exit(1)
end
# Debug on the current node
fun debug(message: String)
do
- if frames.is_empty then
+ var node = current_node
+ if node == null then
print message
else
- self.frame.current_node.debug(message)
+ node.debug(message)
end
end
var val = mpropdef.constant_value
var node = modelbuilder.mpropdef2node(mpropdef)
+ if mpropdef.is_abstract then
+ if node != null then
+ self.frames.unshift new Frame(node, mpropdef, args)
+ end
+ fatal("Abstract method `{mpropdef.mproperty.name}` called on `{args.first.mtype}`")
+ abort
+ end
+
if node isa APropdef then
self.parameter_check(node, mpropdef, args)
return node.call(self, mpropdef, args)
end
end
- # Generate type checks in the C code to check covariant parameters
+ # Execute type checks of covariant parameters
fun parameter_check(node: ANode, mpropdef: MMethodDef, args: Array[Instance])
do
var msignature = mpropdef.msignature
var origmtype = mpropdef.mproperty.intro.msignature.mparameters[i].mtype
if not origmtype.need_anchor then continue
+ #print "{mpropdef}: {mpropdef.mproperty.intro.msignature.mparameters[i]}"
+
# get the parameter type
var mtype = msignature.mparameters[i].mtype
var anchor = args.first.mtype.as(MClassType)
fun send_commons(mproperty: MMethod, args: Array[Instance], mtype: MType): nullable Instance
do
if mtype isa MNullType then
- if mproperty.name == "==" then
+ if mproperty.name == "==" or mproperty.name == "is_same_instance" then
return self.bool_instance(args[0] == args[1])
else if mproperty.name == "!=" then
return self.bool_instance(args[0] != args[1])
self.send(p, args)
else if p isa MAttribute then
assert recv isa MutableInstance
- recv.attributes[p] = arguments[i]
+ write_attribute(p, recv, arguments[i])
i += 1
else abort
end
var cds = mtype.collect_mclassdefs(self.mainmodule).to_a
self.mainmodule.linearize_mclassdefs(cds)
for cd in cds do
- if not self.modelbuilder.mclassdef2nclassdef.has_key(cd) then continue
- var n = self.modelbuilder.mclassdef2nclassdef[cd]
- for npropdef in n.n_propdefs do
- if npropdef isa AAttrPropdef then
- res.add(npropdef)
- end
- end
+ res.add_all(modelbuilder.collect_attr_propdef(cd))
end
cache[mtype] = res
return mainmodule.get_primitive_class(name)
end
- # This function determine the correct type according the reciever of the current definition (self).
+ # This function determines the correct type according to the receiver of the current propdef (self).
fun unanchor_type(mtype: MType): MType
do
- return mtype.anchor_to(self.mainmodule, self.frame.arguments.first.mtype.as(MClassType))
+ return mtype.anchor_to(self.mainmodule, current_receiver_class)
end
# Placebo instance used to mark internal error result when `null` already have a meaning.
# The real value encapsulated if the instance is primitive.
# Else aborts.
- fun val: Object do abort
+ fun val: nullable Object do abort
end
# A instance with attribute (standards objects)
# Special instance to handle primitives values (int, bool, etc.)
# The trick it just to encapsulate the <<real>> value
-class PrimitiveInstance[E: Object]
+class PrimitiveInstance[E]
super Instance
# The real value encapsulated
redef fun ==(o)
do
- if not o isa PrimitiveInstance[Object] then return false
+ if not o isa PrimitiveInstance[nullable Object] then return false
return self.val == o.val
end
redef fun eq_is(o)
do
- if not o isa PrimitiveInstance[Object] then return false
+ if not o isa PrimitiveInstance[nullable Object] then return false
return self.val.is_same_instance(o.val)
end
- redef fun to_s do return "{mtype}#{val.object_id}({val})"
+ redef fun to_s do return "{mtype}#{val.object_id}({val or else "null"})"
redef fun to_i do return val.as(Int)
var arguments: Array[Instance]
# Mapping between a variable and the current value
private var map: Map[Variable, Instance] = new HashMap[Variable, Instance]
+ var comprehension: nullable Array[Instance] = null
end
redef class ANode
v.write_variable(variable, arguments[i+1])
end
- if mpropdef.is_abstract then
- v.fatal("Abstract method `{mpropdef.mproperty.name}` called on `{arguments.first.mtype}`")
- abort
- end
-
# Call the implicit super-init
var auto_super_inits = self.auto_super_inits
if auto_super_inits != null then
else if pname == "exit" then
exit(args[1].to_i)
abort
+ else if pname == "buffer_mode_full" then
+ return v.int_instance(sys.buffer_mode_full)
+ else if pname == "buffer_mode_line" then
+ return v.int_instance(sys.buffer_mode_line)
+ else if pname == "buffer_mode_none" then
+ return v.int_instance(sys.buffer_mode_none)
else if pname == "sys" then
return v.mainobj
else if cname == "Int" then
return v.int_instance(args[0].to_i.bin_xor(args[1].to_i))
else if pname == "bin_not" then
return v.int_instance(args[0].to_i.bin_not)
+ else if pname == "int_to_s_len" then
+ return v.int_instance(recvval.to_s.length)
else if pname == "native_int_to_s" then
- return v.native_string_instance(recvval.to_s)
+ var s = recvval.to_s
+ var srecv = args[1].val.as(Buffer)
+ srecv.clear
+ srecv.append(s)
+ srecv.add('\0')
+ return null
else if pname == "strerror_ext" then
return v.native_string_instance(recvval.strerror)
end
if fromval < 0 then
debug("Illegal access on {recvval} for element {fromval}/{recvval.length}")
end
- if fromval + lenval >= recvval.length then
+ if fromval + lenval > recvval.length then
debug("Illegal access on {recvval} for element {fromval}+{lenval}/{recvval.length}")
end
if toval < 0 then
debug("Illegal access on {destval} for element {toval}/{destval.length}")
end
- if toval + lenval >= destval.length then
+ if toval + lenval > destval.length then
debug("Illegal access on {destval} for element {toval}+{lenval}/{destval.length}")
end
recvval.as(FlatBuffer).copy(fromval, lenval, destval, toval)
else if pname == "atof" then
return v.float_instance(recvval.to_f)
end
+ else if cname == "String" then
+ var cs = v.send(v.force_get_primitive_method("to_cstring", args.first.mtype), [args.first])
+ var str = cs.val.to_s
+ if pname == "files" then
+ var res = new Array[Instance]
+ for f in str.files do res.add v.string_instance(f)
+ return v.array_instance(res, v.get_primitive_class("String").mclass_type)
+ end
else if pname == "calloc_string" then
return v.native_string_instance("!" * args[1].to_i)
else if cname == "NativeArray" then
else if pname == "length" then
return v.int_instance(recvval.length)
else if pname == "copy_to" then
- recvval.copy(0, args[2].to_i, args[1].val.as(Array[Instance]), 0)
+ recvval.copy_to(0, args[2].to_i, args[1].val.as(Array[Instance]), 0)
return null
end
else if cname == "NativeFile" then
if pname == "native_stdout" then
- var instance = new PrimitiveInstance[OStream](mpropdef.mclassdef.mclass.mclass_type, sys.stdout)
+ var inst = new PrimitiveNativeFile.native_stdout
+ var instance = new PrimitiveInstance[PrimitiveNativeFile](mpropdef.mclassdef.mclass.mclass_type, inst)
v.init_instance_primitive(instance)
return instance
else if pname == "native_stdin" then
- var instance = new PrimitiveInstance[IStream](mpropdef.mclassdef.mclass.mclass_type, sys.stdin)
+ var inst = new PrimitiveNativeFile.native_stdin
+ var instance = new PrimitiveInstance[PrimitiveNativeFile](mpropdef.mclassdef.mclass.mclass_type, inst)
v.init_instance_primitive(instance)
return instance
else if pname == "native_stderr" then
- var instance = new PrimitiveInstance[OStream](mpropdef.mclassdef.mclass.mclass_type, sys.stderr)
+ var inst = new PrimitiveNativeFile.native_stderr
+ var instance = new PrimitiveInstance[PrimitiveNativeFile](mpropdef.mclassdef.mclass.mclass_type, inst)
v.init_instance_primitive(instance)
return instance
else if pname == "io_open_read" then
var a1 = args[1].val.as(Buffer)
- var instance = new PrimitiveInstance[IStream](mpropdef.mclassdef.mclass.mclass_type, new IFStream.open(a1.to_s))
+ var inst = new PrimitiveNativeFile.io_open_read(a1.to_s)
+ var instance = new PrimitiveInstance[PrimitiveNativeFile](mpropdef.mclassdef.mclass.mclass_type, inst)
v.init_instance_primitive(instance)
return instance
else if pname == "io_open_write" then
var a1 = args[1].val.as(Buffer)
- var instance = new PrimitiveInstance[OStream](mpropdef.mclassdef.mclass.mclass_type, new OFStream.open(a1.to_s))
+ var inst = new PrimitiveNativeFile.io_open_write(a1.to_s)
+ var instance = new PrimitiveInstance[PrimitiveNativeFile](mpropdef.mclassdef.mclass.mclass_type, inst)
v.init_instance_primitive(instance)
return instance
end
var recvval = args.first.val
if pname == "io_write" then
var a1 = args[1].val.as(Buffer)
- recvval.as(OStream).write(a1.substring(0, args[2].to_i).to_s)
- return args[2]
+ return v.int_instance(recvval.as(PrimitiveNativeFile).io_write(a1.to_cstring, args[2].to_i))
else if pname == "io_read" then
- var str = recvval.as(IStream).read(args[2].to_i)
var a1 = args[1].val.as(Buffer)
- new FlatBuffer.from(str).copy(0, str.length, a1.as(FlatBuffer), 0)
- return v.int_instance(str.length)
+ var ns = new NativeString(a1.length)
+ var len = recvval.as(PrimitiveNativeFile).io_read(ns, args[2].to_i)
+ a1.clear
+ a1.append(ns.to_s_with_length(len))
+ return v.int_instance(len)
+ else if pname == "flush" then
+ recvval.as(PrimitiveNativeFile).flush
+ return null
else if pname == "io_close" then
- recvval.as(IOS).close
- return v.int_instance(0)
- else if pname == "address_is_null" then
- return v.false_instance
+ return v.int_instance(recvval.as(PrimitiveNativeFile).io_close)
+ else if pname == "set_buffering_type" then
+ return v.int_instance(recvval.as(PrimitiveNativeFile).set_buffering_type(args[1].to_i, args[2].to_i))
end
else if pname == "calloc_array" then
var recvtype = args.first.mtype.as(MClassType)
else if pname == "errno" then
return v.int_instance(sys.errno)
else if pname == "address_is_null" then
+ var recv = args[0]
+ if recv isa PrimitiveInstance[PrimitiveNativeFile] then
+ return v.bool_instance(recv.val.address_is_null)
+ end
return v.false_instance
end
return v.error_instance
end
end
-redef class AbstractArray[E]
- fun copy(start: Int, len: Int, dest: AbstractArray[E], new_start: Int)
- do
- self.copy_to(start, len, dest, new_start)
- end
-end
-
redef class AAttrPropdef
redef fun call(v, mpropdef, args)
do
evaluate_expr(v, recv)
return
end
- var mtype = self.mpropdef.static_mtype.as(not null)
+ var mpropdef = self.mpropdef
+ if mpropdef == null then return
+ var mtype = mpropdef.static_mtype.as(not null)
mtype = mtype.anchor_to(v.mainmodule, recv.mtype.as(MClassType))
if mtype isa MNullableType then
v.write_attribute(self.mpropdef.mproperty, recv, v.null_instance)
# Return a possible value
# NOTE: Do not call this method directly, but use `v.expr`
# This method is here to be implemented by subclasses.
- private fun expr(v: NaiveInterpreter): nullable Instance
+ protected fun expr(v: NaiveInterpreter): nullable Instance
do
fatal(v, "NOT YET IMPLEMENTED expr {class_name}")
abort
# Evaluate the node as a statement.
# NOTE: Do not call this method directly, but use `v.stmt`
# This method is here to be implemented by subclasses (no need to return something).
- private fun stmt(v: NaiveInterpreter)
+ protected fun stmt(v: NaiveInterpreter)
do
expr(v)
end
redef fun expr(v)
do
var val = new Array[Instance]
- for nexpr in self.n_exprs.n_exprs do
- var i = v.expr(nexpr)
- if i == null then return null
- val.add(i)
+ var old_comprehension = v.frame.comprehension
+ v.frame.comprehension = val
+ for nexpr in self.n_exprs do
+ if nexpr isa AForExpr then
+ v.stmt(nexpr)
+ else
+ var i = v.expr(nexpr)
+ if i == null then return null
+ val.add(i)
+ end
end
+ v.frame.comprehension = old_comprehension
var mtype = v.unanchor_type(self.mtype.as(not null)).as(MClassType)
var elttype = mtype.arguments.first
return v.array_instance(val, elttype)
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