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vm.py
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vm.py
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import json
from time import sleep
from instructions import *
from visualizer import start_visualizer
from flask_socketio import SocketIO
CELLSIZE = 256
def noneid(key):
if key is None:
return None
return key.keyid
class VMException(Exception):
pass
class Key:
def __init__(self, keyid, comment=None):
self.keyid = keyid
self.refs = 0#increase on copy, decrease on KeyList delete
self.comment = comment
def __str__(self):
#[%i]" % self.refs
return "🔑 " + str(self.__class__).split(".")[-1][:-2] + ": " + str(self.keyid)
def __repr__(self):
return str(self)
def attenuate(self, option=None):
return self
def dumps(self):
return {
"class": "Key",#self.__class__.__name__,
"keyid": self.keyid,
"refs": self.refs,
"comment": self.comment
}
def loads(data):
key = Key(data["keyid"], comment=data["comment"])
key.refs = data["refs"]
return key
def fixreferences(self, keys):
pass
class DataKey(Key):
def __init__(self, keyid, value, *args, **kwargs):
super().__init__(keyid, *args, **kwargs)
self.value = value
def dumps(self):
return {
"class": "DataKey",
"keyid": self.keyid,
"value": self.value,
"refs": self.refs,
"comment": self.comment
}
def loads(data):
key = DataKey(data["keyid"], data["value"], comment=data["comment"])
key.refs = data["refs"]
return key
class PageKey(Key):
def __init__(self, keyid, secret, *args, **kwargs):
super().__init__(keyid, *args, **kwargs)
self.secret = secret
def attenuate(self, vm, option=None):
if option == A_READ:
return vm.create_key(PageReadKey, self.secret, comment="Attenuated")
def dumps(self):
return {
"class": "PageKey",#self.__class__.__name__,
"keyid": self.keyid,
"secret": self.secret,
"refs": self.refs,
"comment": self.comment
}
def loads(data):
key = PageKey(data["keyid"], data["secret"], comment=data["comment"])
key.refs = data["refs"]
return key
class PageReadKey(Key):
pass
# Parent meter, controlling domain, resources
class MeterKey(DataKey):
def __init__(self, keyid, value, parent, keeper=None, *args, **kwargs):
super().__init__(keyid, value, *args, **kwargs)
self.parent = parent
self.keeper = keeper
def use(self, amount):
if self.value >= 0 and self.value < amount:
return False
else:
self.value -= amount
return True
def attenuate(self, vm, option):
if option == 0:
return self#still return copy?
else:
return vm.create_key(MeterKey, self.value//option, self, comment="Attenuated Meter")#XXXBULLSHIT
def dumps(self):
return {
"class": "MeterKey",#"#self.__class__.__name__,
"keyid": self.keyid,
"value": self.value,
"refs": self.refs,
"parent": self.parent.keyid if self.parent else None,
"keeper": self.keeper.keyid,
"comment": self.comment
}
def loads(data):
key = MeterKey(data["keyid"], data["value"], data["parent"], data["keeper"], comment=data["comment"])
key.refs = data["refs"]
return key
def fixreferences(self, keys):
if self.parent:
self.parent = keys[self.parent]
self.keeper = keys[self.keeper]
class SystemKey(DataKey):
pass
class Page:
def __init__(self, type, parentmeter, size, comment=None):
if size != -1 and not parentmeter.use(size):#eh, with size == 0 could spam?
raise AssertionError("NOT IMPLEMENTED")
return None
self.type = type
self.meter = parentmeter
self.data = [None for i in range(size)]
self.comment = comment
def __iter__(self):
return iter(self.data)
def dumps(self):
return {
"class": "Page",#self.__class__.__name__,
"type": self.type,
"meter": self.meter.keyid,
"data": self.data if self.type == PG_DATA else [noneid(key) for key in self.data],
"comment": self.comment
}
def loads(data):
page = Page(data["type"], data["meter"], -1, comment=data["comment"])
page.data = data["data"]
return page
def fixreferences(self, keys):
self.meter = keys[self.meter]
if self.type == PG_KEYS:
self.data = [keys[keyid] if keyid else None for keyid in self.data]
class PageContext:
def __init__(self, vm, page, option):
self.vm = vm
self.page = page
self.option = option
def resize(self, size):
if self.option != A_WRITE:
raise VMException("No write permissions on page")
return None
if not self.page.meter.use(size):
raise AssertionError("NOT IMPLEMENTED")
return None
if size < len(self.page.data):
self.page.data = self.page.data[:size]
else:
self.page.data += [0 for i in range(size-len(self.page.data))]
def __getitem__(self, key):
return self.page.data[key]
def __setitem__(self, key, value):
if self.option != A_WRITE:
raise VMException("No write permissions on page")
return None
if self.page.type == PG_DATA and isinstance(value, int):
self.page.data[key] = value
elif self.page.type == PG_KEYS and isinstance(value, Key):
if self.page.data[key] is not None:
self.page.data[key].refs -= 1
if self.page.data[key].refs <= 0:
del self.vm.keys[self.page.data[key].keyid]
value.refs += 1
self.page.data[key] = value
else:
raise ValueError("Invalid write", self.page.type, value)
def __repr__(self):
return str(self.page.data)
def __len__(self):
return len(self.page.data)
def __iter__(self):
return iter(self.page.data)
def loadkey(data):
if data["class"] in "Key PageKey MeterKey DataKey".split():
return globals()[data["class"]].loads(data)
raise Exception("Invalid key class", data["class"])
class KeyVM:
def __init__(self):
self.ids = 0
self.keys = {}
self.prime_time_meter = self.create_key(MeterKey, -1, None, comment="Prime Time Meter")
self.prime_memory_meter = self.create_key(MeterKey, -1, None, comment="Prime Memory Meter")
self.prime_system_key = self.create_key(SystemKey, 0, comment="Prime System Key")
self.pages = {}
self.active = None#assume single-threaded
def __repr__(self):
keypages = 0
datapages = 0
keys = 0
for pageid, page in self.pages.items():
if page.type == PG_KEYS:
keypages += 1
for field in page:
if field is not None:
keys += 1
else:
datapages += 1
a = f"Time: {self.prime_time_meter.value}\tMemory:{self.prime_memory_meter.value}\t"
#b = f"Domain:{len(self.get_page(self.active))}\tPages:{len(self.pages)}\t"
c = f"DataPages:{datapages}\tKeyPages:{keypages}\tKeys:{keys}"
return a+c
def create_id(self):
#should use dict with globally unique id, in case pages get deleted
self.ids += 1
return self.ids
def create_key(self, keyclass, *args, **kwargs):
key = keyclass(self.create_id(), *args, **kwargs)
self.keys[key.keyid] = key
return key
def create_page(self, type, memory_meter_key, pagesize, comment=None):
page = Page(type, memory_meter_key, pagesize, comment=comment)
keycomment = None if comment is None else comment + " Page Key"
pagekey = self.create_key(PageKey, self.create_id(), comment=keycomment)
self.pages[pagekey.secret] = page
return pagekey
def get_page(self, pagekey):
assert isinstance(pagekey, PageKey)
page = self.pages[pagekey.secret]
if isinstance(pagekey, PageReadKey):
option = A_READ
else:
option = A_WRITE
page_context = PageContext(self, page, option)
return page_context
def domainkey_from_code(self, code, stacksize=None, datasize=None):
domainkey = self.create_page(PG_KEYS, self.prime_memory_meter, DOMAINFIELDS, comment="Domain")
self.prime_time_meter.keeper = domainkey
self.prime_memory_meter.keeper = domainkey
domainpage = self.get_page(domainkey)
domainpage[D_SELF] = domainkey
# TODO DANGER: if not checked datakeys could be misused for value as reference
domainpage[D_STATE] = self.create_key(DataKey, S_ACTIVE, comment="D_STATE")
domainpage[D_TIME] = self.prime_time_meter
domainpage[D_MEMORY] = self.prime_memory_meter
domainpage[D_IP] = self.create_key(DataKey, 0, comment="D_IP")
codepagekey = self.create_page(PG_DATA, self.prime_memory_meter, len(code), comment="Code")
self.copycode(codepagekey, code)
domainpage[D_CODE] = codepagekey
domainpage[D_POINTER] = self.create_key(DataKey, 0, comment="Stack Pointer")
stackpagekey = self.create_page(PG_DATA, self.prime_memory_meter, stacksize if stacksize else 256, comment="Stack")
domainpage[D_STACK] = stackpagekey
datapagekey = self.create_page(PG_DATA, self.prime_memory_meter, datasize if datasize else 256, comment="Data")
domainpage[D_DATA] = datapagekey
# First domain receives prime system key
domainpage[D_RECV] = self.prime_system_key
return domainkey
def copycode(self, codepagekey, code):
codepage = self.get_page(codepagekey)
assert len(code) <= len(codepage)
for i in range(len(code)):
codepage[i] = code[i]
def run_code(self, code, timelimit=None, memorylimit=None, stacksize=None, datasize=None, debug=False, opendebugger=False, debugcomm=False, debugsleep=None):
if timelimit is not None:
self.prime_time_meter.value = timelimit
if memorylimit is not None:
self.prime_memory_meter.value = memorylimit
domainkey = self.domainkey_from_code(code, stacksize=stacksize, datasize=datasize)
self.active = domainkey
self.run_active(debug=debug, opendebugger=opendebugger, debugcomm=debugcomm, debugsleep=debugsleep)
return self.image()
def image(self):
# Spec: Must be guaranteed to be JSON-serializable
jdata = {
"active": self.active.keyid,
"ids": self.ids,
"keys": {keyid: key.dumps() for keyid, key in self.keys.items()},
"pages": {pageid: page.dumps() for pageid, page in self.pages.items()},
"prime_memory_meter": self.prime_memory_meter.keyid,
"prime_time_meter": self.prime_time_meter.keyid,
"prime_system_key": noneid(self.prime_system_key),
}
return jdata
def run(self, image, timelimit=None, memorylimit=None, debug=False, opendebugger=False, debugcomm=False, debugsleep=None):
jdata = image
keys = jdata["keys"]
pages = jdata["pages"]
self.keys = {int(keyid):loadkey(keydump) for keyid, keydump in keys.items()}
self.pages = {int(pageid):Page.loads(pagedump) for pageid, pagedump in pages.items()}
for key in self.keys.values():
key.fixreferences(self.keys)
for page in self.pages.values():
page.fixreferences(self.keys)
self.active = self.keys[jdata["active"]]
self.ids = jdata["ids"]
if debug:
print(self.keys)
self.prime_time_meter = self.keys[jdata["prime_time_meter"]]
self.prime_memory_meter = self.keys[jdata["prime_memory_meter"]]
try:
self.prime_system_key = self.keys[jdata["prime_system_key"]]
except KeyError:
# Looks like the domain threw its system key away. Oh well
self.prime_system_key = None
if timelimit is not None:
self.prime_time_meter.value = timelimit
if memorylimit is not None:
self.prime_memory_meter.value = memorylimit
self.run_active(debug=debug, opendebugger=opendebugger, debugcomm=debugcomm, debugsleep=debugsleep)
return self.image()
def system_call(key):
# TODO must return key of some sort
pass
def setorcreate(self, pagecontext, index, value, comment=None):
if pagecontext[index] is None or not isinstance(pagecontext[index], DataKey):
pagecontext[index] = self.create_key(DataKey, value, comment=comment)
else:
pagecontext[index].value = value
def run_active(self, debug=False, opendebugger=False, debugcomm=False, debugsleep=None):
sio = None
if debug:
if opendebugger:
start_visualizer()
if debugcomm:
sio = SocketIO(message_queue="redis://127.0.0.1:6379/0", use_reloader=False, debug=False)
sio.emit('broadcast', {'message': "{'status': 'VM connected'}"})
current = self.active
while True:#current.associated(self, D_STATE).value == S_ACTIVE:
# do a step
# Ascend the meter chain
if debug:
print(self)
# TODO investigate this
if current is None:
break
# TODO what if this fails?
domainpage = self.get_page(current)
self.setorcreate(domainpage, D_STATE, S_ACTIVE)
try:
timekey = domainpage[D_TIME]
chain = [timekey]
if debug:
self.viz(sio, opendebugger, debugsleep)
while True:
parentkey = chain[-1].parent
if parentkey is None:
break
chain.append(parentkey)
#print([str(k) for k in chain])
#print(chain)
EXIT_VM = False
STEPCOST = 1
for meterkey in chain[::-1]:
if meterkey.value <= STEPCOST:
parentmeterkey = meterkey.parent
if parentmeterkey is None:
EXIT_VM = True
break
current = parentmeterkey.keeper
continue
if EXIT_VM:
break
for meterkey in chain:
meterkey.value -= STEPCOST
codepage = self.get_page(domainpage[D_CODE])
# TODO assert datapage
ipkey = domainpage[D_IP]
ip = ipkey.value
if ip >= len(codepage):
# TODO move up
if timekey.parent is None:
break
continue
I = codepage[ip]
stackpage = self.get_page(domainpage[D_STACK])
pointerkey = domainpage[D_POINTER]
pointer = pointerkey.value
datapage = self.get_page(domainpage[D_DATA])
#print(str(self) + f"\tIP:{ip}\tINSTR:{INSTRUCTIONNAMES[I]}\tPNT:{pointer}")
reqs = REQUIREMENTS[I]
jump = False
def codearg():
return codepage[ip+1]
def codeargs(n):
return codepage[ip+1:ip+1+n]
def pop():
if pointerkey.value == 0:
raise VMException("StackUnderflow")
value = stackpage[pointerkey.value-1]
stackpage[pointerkey.value-1] = 0
pointerkey.value -= 1
return value
def popn(n):
if pointerkey.value < n:
raise VMException("StackUnderflow")
values = []
for index in range(pointerkey.value-n, pointerkey.value, 1):
values.append(stackpage[index])
stackpage[index] = 0
pointerkey.value -= n
return values
def push(v):
if pointerkey.value + 1 >= len(stackpage):
raise VMException("StackOverflow")
stackpage[pointerkey.value] = v
pointerkey.value += 1
def pushn():
pass
if I == I_PUSH:
arg = codearg()
push(arg)
elif I == I_ADD:
a,b = popn(2)
push(a+b)
elif I == I_SUB:
a,b = popn(2)
push(a-b)
elif I == I_MUL:
a,b = popn(2)
push(a*b)
elif I == I_DIV:
a,b = popn(2)
if b == 0:
raise VMException("DivisionByZero")
push(a//b)
elif I == I_MOD:
a,b = popn(2)
if b == 0:
raise VMException("DivisionByZero")
push(a%b)
elif I == I_AND:
a,b = popn(2)
push(a&b)
elif I == I_OR:
a,b = popn(2)
push(a|b)
elif I == I_XOR:
a,b = popn(2)
push(a^b)
elif I == I_NOT:
a = pop()
push(~a)
elif I == I_CREATEPAGE:
targetindex, type, meterkeyindex, size = popn(4)
domainpage[targetindex] = self.create_page(type, domainpage[meterkeyindex], size)
elif I == I_PAGETYPE:
sourceindex = pop()
page = self.get_page(domainpage[sourceindex])
push(page.type)
elif I == I_PAGESIZEGET:
sourceindex = pop()
page = self.get_page(domainpage[sourceindex])
push(len(page))
elif I == I_PAGESIZESET:
targetindex, size = popn(2)
page = self.get_page(domainpage[targetindex])
page.resize(size)
elif I == I_COPYKEY:
targetpagekeyindex, targetpageindex, sourcepagekeyindex, sourcepageindex = popn(4)
sourcepage = self.get_page(domainpage[sourcepagekeyindex])
key = sourcepage[sourcepageindex]
targetpage = self.get_page(domainpage[targetpagekeyindex])
targetpage[targetpageindex] = key
elif I == I_ATTENUATE:
targetpagekeyindex, targetpageindex, sourcepagekeyindex, sourcepageindex, type = popn(5)
sourcepage = self.get_page(domainpage[sourcepagekeyindex])
key = sourcepage[sourcepageindex]
targetpage = self.get_page(domainpage[targetpagekeyindex])
attenuated_key = key.attenuate(self, type)
targetpage[targetpageindex] = attenuated_key
elif I == I_JUMP:
jumptarget = pop()
ipkey.value = jumptarget
jump = True
elif I == I_JUMPIF:
jumptarget, condition = popn(2)
if condition:
ipkey.value = jumptarget
jump = True
elif I == I_CALL:
targetdomainkeyindex, transferkeyindex = popn(2)
targetdomainkey = domainpage[domainkeyindex]
if isinstance(targetdomainkey, SystemKey):
domainpage[D_RECV] = system_call(domainpage[transferkeyindex])
else:
targetdomain = self.get_page(targetdomainkey)
self.setorcreate(domainpage, D_STATE, S_ACTIVE)
transferkey = domainpage[transferkeyindex]
targetdomain[D_RECV] = transferkey
# check if targetdomain is keypage!
self.active = targetdomainkey
current = self.active
elif I == I_PAGEREAD:
sourcepagekeyindex, sourcepageindex = popn(2)
sourcepage = self.get_page(domainpage[sourcepagekeyindex])
if sourcepage.type != PG_DATA:
raise VMException("Trying to read from non-data page")
# XXX just skip?
push(sourcepage[sourcepageindex])
elif I == I_PAGEWRITE:
data, targetpagekeyindex, targetpageindex = popn(3)
targetpage = self.get_page(domainpage[targetpagekeyindex])
if targetpage.type != PG_DATA:
raise VMException("Trying to write to non-data page")
# XXX just skip?
targetpage[targetpageindex] = data
#print("Stack:", stackpage[:pointerkey.value])
if not jump:
ipkey.value += 1 + reqs[R_CARGS]
except VMException as e:
print(e)
# XXX make sure this domainpage is actually the most recent one
self.setorcreate(domainpage, D_STATE, S_ERROR)
timekey = domainpage[D_TIME]
EXIT_VM = False
# check domain repair key
# ensure control returns to caller or meter parent
while True:
if timekey.keeper is not None:
keeper = self.get_page(timekey.keeper)
if keeper[D_STATE].value != S_ERROR:
self.active = timekey.keeper
current = self.active
break
if timekey.parent is None:
EXIT_VM = True
break
timekey = timekey.parent
if EXIT_VM:
break
def viz(self, sio, opendebugger=False, debugsleep=None):
if opendebugger:
image = self.image()
for page in image["pages"].values():
if page["type"] == PG_KEYS and page["comment"] == "Domain":
pageid = image["keys"][page["data"][D_CODE]]["secret"]
codepage = image["pages"][pageid]
ipvalue = image["keys"][page["data"][D_IP]]["value"]
codepage["ip"] = ipvalue
for page in image["pages"].values():
if page["type"] == PG_DATA and page["comment"] == "Code":
page["disasm"] = self.disassemble(page)
sio.emit('broadcast', {'type': 'update', 'message': {'image': json.dumps(image)}})
if debugsleep:
sleep(debugsleep)
def disassemble(self, codepage):
i = 0
result = []
while i < len(codepage["data"]):
opcode = codepage["data"][i]
numargs = REQUIREMENTS[opcode][0]
opinfo = {"op": INSTRUCTIONNAMES[opcode]}
if numargs > 0:
opinfo["args"] = codepage["data"][i+1:i+1+numargs]
if "ip" in codepage and codepage["ip"] == i:
opinfo["active"] = True
result.append(opinfo)
i += 1 + numargs#skip args
return result