def doPrivileged(klass, vm, method, frame):
action = frame.get_local(0)
run_method_name = Class.method_name('run', '()Ljava/lang/Object;')
method = action._klass.methods[run_method_name]
# instance to call on
result = vm.wrap_run_method(action, method)
return result
def invokevirtual_special(vm, frame, offset, bytecode):
method_index = vm.constant_pool_index(bytecode, frame.pc)
new_klass, method = vm.resolve_field(frame.klass, method_index)
# fetch the instance and then extract the class from that.
# we do this so that in the case of an abstract class we get
# the implemented method
if bytecode[frame.pc] == 182:
instance = frame.stack[-len(method.parameters)-1]
if instance is null:
# remove all our method parameters
for i in xrange(len(method.parameters)+1):
frame.pop()
raise Exception
vm.throw_exception(frame, 'java/lang/NullPointerException')
return
assert new_klass.is_subclass(instance),\
'%s not a subclass of %s' % (str(new_klass), str(instance))
new_klass = instance._klass
if bytecode[frame.pc] == 184:
assert (method.access_flags & ACC_STATIC) != 0
# find the superclass that contains this method (or we have it)
method_name = Class.method_name(method.name, method.descriptor)
while method_name not in new_klass.methods:
new_klass = new_klass.super_class
if new_klass.super_class == new_klass:
break
assert method_name in new_klass.methods
new_method = new_klass.methods[method_name]
vm.run_method(new_klass, new_method)
frame.pc += 2
def invokevirtual_special(vm, frame, offset, bytecode):
method_index = vm.constant_pool_index(bytecode, frame.pc)
new_klass, method = vm.resolve_field(frame.klass, method_index)
# fetch the instance and then extract the class from that.
# we do this so that in the case of an abstract class we get
# the implemented method
if bytecode[frame.pc] == 182:
instance = frame.stack[-len(method.parameters) - 1]
if instance is null:
# remove all our method parameters
for i in xrange(len(method.parameters) + 1):
frame.pop()
raise Exception
vm.throw_exception(frame, 'java/lang/NullPointerException')
return
assert new_klass.is_subclass(instance),\
'%s not a subclass of %s' % (str(new_klass), str(instance))
new_klass = instance._klass
if bytecode[frame.pc] == 184:
assert (method.access_flags & ACC_STATIC) != 0
# find the superclass that contains this method (or we have it)
method_name = Class.method_name(method.name, method.descriptor)
while method_name not in new_klass.methods:
new_klass = new_klass.super_class
if new_klass.super_class == new_klass:
break
assert method_name in new_klass.methods
new_method = new_klass.methods[method_name]
vm.run_method(new_klass, new_method)
frame.pc += 2
def parse(self):
# read the first magic bytes
for magic in MAGIC:
byte = self._read_byte()
if byte != magic:
raise MalformedClassException()
klass = self.klass
# class file version
klass.minor_version = self._read_byte2()
klass.major_version = self._read_byte2()
constant_pool_length = self._read_byte2()
klass.constant_pool = ConstantPool(constant_pool_length)
while klass.constant_pool.size < constant_pool_length - 1:
klass.constant_pool.add_pool(self.parse_constant_pool_item())
klass.access_flags = self._read_byte2()
klass.this_class = klass.constant_pool.get_class(self._read_byte2())
super_class_index = self._read_byte2()
klass.super_class = 'java/lang/Object'
if super_class_index != 0:
klass.super_class = klass.constant_pool.get_class(
super_class_index)
interfaces_count = self._read_byte2()
for i in xrange(interfaces_count):
klass.interfaces.append(
klass.constant_pool.get_class(self._read_byte2()))
field_length = self._read_byte2()
for i in xrange(field_length):
field = self.parse_field()
klass.fields[field.name] = field
method_count = self._read_byte2()
for i in xrange(method_count):
method = self.parse_method()
klass.methods[Class.method_name(method)] = method
klass.attributes = self.parse_attributes()
def parse(self):
# read the first magic bytes
for magic in MAGIC:
byte = self._read_byte()
if byte != magic:
raise MalformedClassException()
klass = self.klass
# class file version
klass.minor_version = self._read_byte2()
klass.major_version = self._read_byte2()
constant_pool_length = self._read_byte2()
klass.constant_pool = ConstantPool(constant_pool_length)
while klass.constant_pool.size < constant_pool_length-1:
klass.constant_pool.add_pool(self.parse_constant_pool_item())
klass.access_flags = self._read_byte2()
klass.this_class = klass.constant_pool.get_class(self._read_byte2())
super_class_index = self._read_byte2()
klass.super_class = 'java/lang/Object'
if super_class_index != 0:
klass.super_class = klass.constant_pool.get_class(super_class_index)
interfaces_count = self._read_byte2()
for i in xrange(interfaces_count):
klass.interfaces.append(klass.constant_pool.get_class(self._read_byte2()))
field_length = self._read_byte2()
for i in xrange(field_length):
field = self.parse_field()
klass.fields[field.name] = field
method_count = self._read_byte2()
for i in xrange(method_count):
method = self.parse_method()
klass.methods[Class.method_name(method)] = method
klass.attributes = self.parse_attributes()