mirror of
https://github.com/YosysHQ/yosys
synced 2025-10-31 19:52:31 +00:00
a52088b6af
This extends the experimental incremental JSON API to allow arbitrary smtlib subexpressions, defining smtlib constants and to allow access of signals by their .yw path. It also fixes a bug during .yw writing where values would be re-emitted in later cycles if they have no newer defined value and a potential crash when using --track-assumes.
616 lines
19 KiB
Python
616 lines
19 KiB
Python
from collections import defaultdict
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import json
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import typing
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import ywio
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if typing.TYPE_CHECKING:
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import smtbmc
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else:
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import sys
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smtbmc = sys.modules["__main__"]
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class InteractiveError(Exception):
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pass
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def mkkey(data):
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if isinstance(data, list):
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return tuple(map(mkkey, data))
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elif isinstance(data, dict):
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raise InteractiveError(f"JSON objects found in assumption key: {data!r}")
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return data
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class Incremental:
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def __init__(self):
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self.traceidx = 0
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self.state_set = set()
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self.map_cache = {}
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self._cached_hierwitness = {}
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self._witness_index = None
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self._yw_constraints = {}
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self._define_sorts = {}
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def setup(self):
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generic_assert_map = smtbmc.get_assert_map(
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smtbmc.topmod, "state", smtbmc.topmod
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)
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self.inv_generic_assert_map = {
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tuple(data[1:]): key for key, data in generic_assert_map.items()
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}
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assert len(self.inv_generic_assert_map) == len(generic_assert_map)
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def print_json(self, **kwargs):
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print(json.dumps(kwargs), flush=True)
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def print_msg(self, msg):
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self.print_json(msg=msg)
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def get_cached_assert(self, step, name):
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try:
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assert_map = self.map_cache[step]
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except KeyError:
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assert_map = self.map_cache[step] = smtbmc.get_assert_map(
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smtbmc.topmod, f"s{step}", smtbmc.topmod
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)
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return assert_map[self.inv_generic_assert_map[name]][0]
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def arg_step(self, cmd, declare=False, name="step", optional=False):
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step = cmd.get(name, None)
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if step is None and optional:
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return None
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if not isinstance(step, int):
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if optional:
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raise InteractiveError(f"{name} must be an integer")
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else:
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raise InteractiveError(f"integer {name} argument required")
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if declare and step in self.state_set:
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raise InteractiveError(f"step {step} already declared")
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if not declare and step not in self.state_set:
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raise InteractiveError(f"step {step} not declared")
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return step
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def expr_arg_len(self, expr, min_len, max_len=-1):
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if max_len == -1:
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max_len = min_len
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arg_len = len(expr) - 1
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if min_len is not None and arg_len < min_len:
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if min_len == max_len:
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raise InteractiveError(
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f"{json.dumps(expr[0])} expression must have "
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f"{min_len} argument{'s' if min_len != 1 else ''}"
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)
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else:
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raise InteractiveError(
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f"{json.dumps(expr[0])} expression must have at least "
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f"{min_len} argument{'s' if min_len != 1 else ''}"
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)
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if max_len is not None and arg_len > max_len:
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raise InteractiveError(
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f"{json.dumps(expr[0])} expression can have at most "
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f"{min_len} argument{'s' if max_len != 1 else ''}"
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)
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def expr_step(self, expr, smt_out):
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self.expr_arg_len(expr, 1)
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step = expr[1]
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if step not in self.state_set:
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raise InteractiveError(f"step {step} not declared")
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smt_out.append(f"s{step}")
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return "module", smtbmc.topmod
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def expr_cell(self, expr, smt_out):
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self.expr_arg_len(expr, 2)
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position = len(smt_out)
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smt_out.append(None)
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arg_sort = self.expr(expr[2], smt_out, required_sort=["module", None])
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smt_out.append(")")
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module = arg_sort[1]
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cell = expr[1]
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submod = smtbmc.smt.modinfo[module].cells.get(cell)
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if submod is None:
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raise InteractiveError(f"module {module!r} has no cell {cell!r}")
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smt_out[position] = f"(|{module}_h {cell}| "
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return ("module", submod)
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def expr_mod_constraint(self, expr, smt_out):
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suffix = expr[0][3:]
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self.expr_arg_len(expr, 1, 2 if suffix in ["_a", "_u", "_c"] else 1)
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position = len(smt_out)
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smt_out.append(None)
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arg_sort = self.expr(expr[-1], smt_out, required_sort=["module", None])
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module = arg_sort[1]
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if len(expr) == 3:
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smt_out[position] = f"(|{module}{suffix} {expr[1]}| "
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else:
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smt_out[position] = f"(|{module}{suffix}| "
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smt_out.append(")")
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return "Bool"
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def expr_mod_constraint2(self, expr, smt_out):
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self.expr_arg_len(expr, 2)
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position = len(smt_out)
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smt_out.append(None)
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arg_sort = self.expr(expr[1], smt_out, required_sort=["module", None])
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smt_out.append(" ")
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self.expr(expr[2], smt_out, required_sort=arg_sort)
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module = arg_sort[1]
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suffix = expr[0][3:]
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smt_out[position] = f"(|{module}{suffix}| "
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smt_out.append(")")
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return "Bool"
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def expr_not(self, expr, smt_out):
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self.expr_arg_len(expr, 1)
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smt_out.append("(not ")
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self.expr(expr[1], smt_out, required_sort="Bool")
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smt_out.append(")")
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return "Bool"
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def expr_eq(self, expr, smt_out):
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self.expr_arg_len(expr, 2)
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smt_out.append("(= ")
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arg_sort = self.expr(expr[1], smt_out)
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if (
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smtbmc.smt.unroll
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and isinstance(arg_sort, (list, tuple))
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and arg_sort[0] == "module"
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):
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raise InteractiveError("state equality not supported in unroll mode")
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smt_out.append(" ")
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self.expr(expr[2], smt_out, required_sort=arg_sort)
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smt_out.append(")")
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return "Bool"
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def expr_andor(self, expr, smt_out):
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if len(expr) == 1:
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smt_out.push({"and": "true", "or": "false"}[expr[0]])
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elif len(expr) == 2:
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self.expr(expr[1], smt_out, required_sort="Bool")
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else:
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sep = f"({expr[0]} "
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for arg in expr[1:]:
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smt_out.append(sep)
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sep = " "
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self.expr(arg, smt_out, required_sort="Bool")
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smt_out.append(")")
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return "Bool"
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def expr_bv_binop(self, expr, smt_out):
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self.expr_arg_len(expr, 2)
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smt_out.append(f"({expr[0]} ")
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arg_sort = self.expr(expr[1], smt_out, required_sort=("BitVec", None))
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smt_out.append(" ")
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self.expr(expr[2], smt_out, required_sort=arg_sort)
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smt_out.append(")")
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return arg_sort
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def expr_extract(self, expr, smt_out):
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self.expr_arg_len(expr, 3)
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hi = expr[1]
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lo = expr[2]
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smt_out.append(f"((_ extract {hi} {lo}) ")
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arg_sort = self.expr(expr[3], smt_out, required_sort=("BitVec", None))
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smt_out.append(")")
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if not (isinstance(hi, int) and 0 <= hi < arg_sort[1]):
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raise InteractiveError(
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f"high bit index must be 0 <= index < {arg_sort[1]}, is {hi!r}"
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)
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if not (isinstance(lo, int) and 0 <= lo <= hi):
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raise InteractiveError(
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f"low bit index must be 0 <= index < {hi}, is {lo!r}"
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)
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return "BitVec", hi - lo + 1
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def expr_bv(self, expr, smt_out):
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self.expr_arg_len(expr, 1)
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arg = expr[1]
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if not isinstance(arg, str) or arg.count("0") + arg.count("1") != len(arg):
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raise InteractiveError("bv argument must contain only 0 or 1 bits")
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smt_out.append("#b" + arg)
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return "BitVec", len(arg)
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def expr_yw(self, expr, smt_out):
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self.expr_arg_len(expr, 1, 2)
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if len(expr) == 2:
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name = None
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step = expr[1]
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elif len(expr) == 3:
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name = expr[1]
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step = expr[2]
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if step not in self.state_set:
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raise InteractiveError(f"step {step} not declared")
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if name not in self._yw_constraints:
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raise InteractiveError(f"no yw file loaded as name {name!r}")
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constraints = self._yw_constraints[name].get(step, [])
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if len(constraints) == 0:
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smt_out.append("true")
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elif len(constraints) == 1:
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smt_out.append(constraints[0])
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else:
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sep = "(and "
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for constraint in constraints:
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smt_out.append(sep)
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sep = " "
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smt_out.append(constraint)
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smt_out.append(")")
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return "Bool"
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def expr_yw_sig(self, expr, smt_out):
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self.expr_arg_len(expr, 3, 4)
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step = expr[1]
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path = expr[2]
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offset = expr[3]
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width = expr[4] if len(expr) == 5 else 1
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if not isinstance(offset, int) or offset < 0:
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raise InteractiveError(
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f"offset must be a non-negative integer, got {json.dumps(offset)}"
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)
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if not isinstance(width, int) or width <= 0:
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raise InteractiveError(
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f"width must be a positive integer, got {json.dumps(width)}"
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)
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if not isinstance(path, list) or not all(isinstance(s, str) for s in path):
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raise InteractiveError(
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f"path must be a string list, got {json.dumps(path)}"
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)
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if step not in self.state_set:
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raise InteractiveError(f"step {step} not declared")
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smt_expr = smtbmc.ywfile_signal(
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ywio.WitnessSig(path=path, offset=offset, width=width), step
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)
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smt_out.append(smt_expr)
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return "BitVec", width
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def expr_smtlib(self, expr, smt_out):
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self.expr_arg_len(expr, 2)
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smtlib_expr = expr[1]
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sort = expr[2]
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if not isinstance(smtlib_expr, str):
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raise InteractiveError(
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"raw SMT-LIB expression has to be a string, "
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f"got {json.dumps(smtlib_expr)}"
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)
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if (
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isinstance(sort, list)
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and len(sort) == 2
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and sort[0] == "BitVec"
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and (sort[1] is None or isinstance(sort[1], int))
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):
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sort = tuple(sort)
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elif not isinstance(sort, str):
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raise InteractiveError(f"unsupported raw SMT-LIB sort {json.dumps(sort)}")
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smt_out.append(smtlib_expr)
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return sort
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def expr_label(self, expr, smt_out):
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if len(expr) != 3:
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raise InteractiveError(
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f'expected ["!", label, sub_expr], got {json.dumps(expr)}'
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)
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label = expr[1]
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subexpr = expr[2]
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if not isinstance(label, str):
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raise InteractiveError("expression label has to be a string")
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smt_out.append("(! ")
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sort = self.expr(subexpr, smt_out)
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smt_out.append(" :named ")
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smt_out.append(label)
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smt_out.append(")")
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return sort
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def expr_def(self, expr, smt_out):
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self.expr_arg_len(expr, 1)
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sort = self._define_sorts.get(expr[1])
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if sort is None:
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raise InteractiveError(f"unknown definition {json.dumps(expr)}")
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smt_out.append(expr[1])
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return sort
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expr_handlers = {
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"step": expr_step,
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"cell": expr_cell,
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"mod_h": expr_mod_constraint,
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"mod_is": expr_mod_constraint,
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"mod_i": expr_mod_constraint,
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"mod_a": expr_mod_constraint,
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"mod_u": expr_mod_constraint,
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"mod_t": expr_mod_constraint2,
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"not": expr_not,
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"and": expr_andor,
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"or": expr_andor,
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"bv": expr_bv,
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"bvand": expr_bv_binop,
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"bvor": expr_bv_binop,
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"bvxor": expr_bv_binop,
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"extract": expr_extract,
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"def": expr_def,
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"=": expr_eq,
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"yw": expr_yw,
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"yw_sig": expr_yw_sig,
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"smtlib": expr_smtlib,
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"!": expr_label,
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}
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def expr(self, expr, smt_out, required_sort=None):
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if not isinstance(expr, (list, tuple)) or not expr:
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raise InteractiveError(
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f"expression must be a non-empty JSON array, found: {json.dumps(expr)}"
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)
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name = expr[0]
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handler = self.expr_handlers.get(name)
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if handler:
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sort = handler(self, expr, smt_out)
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if required_sort is not None:
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if isinstance(required_sort, (list, tuple)):
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if (
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not isinstance(sort, (list, tuple))
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or len(sort) != len(required_sort)
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or any(
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r is not None and r != s
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for r, s in zip(required_sort, sort)
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)
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):
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raise InteractiveError(
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f"required sort {json.dumps(required_sort)} "
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f"found sort {json.dumps(sort)}"
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)
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return sort
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raise InteractiveError(f"unknown expression {json.dumps(expr[0])}")
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def expr_smt(self, expr, required_sort):
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return self.expr_smt_and_sort(expr, required_sort)[0]
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def expr_smt_and_sort(self, expr, required_sort=None):
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smt_out = []
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output_sort = self.expr(expr, smt_out, required_sort=required_sort)
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out = "".join(smt_out)
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return out, output_sort
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def cmd_new_step(self, cmd):
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step = self.arg_step(cmd, declare=True)
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self.state_set.add(step)
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smtbmc.smt_state(step)
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def cmd_assert(self, cmd):
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name = cmd.get("cmd")
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assert_fn = {
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"assert_antecedent": smtbmc.smt_assert_antecedent,
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"assert_consequent": smtbmc.smt_assert_consequent,
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"assert": smtbmc.smt_assert,
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}[name]
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assert_fn(self.expr_smt(cmd.get("expr"), "Bool"))
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def cmd_assert_design_assumes(self, cmd):
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step = self.arg_step(cmd)
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smtbmc.smt_assert_design_assumes(step)
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def cmd_get_design_assume(self, cmd):
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key = mkkey(cmd.get("key"))
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return smtbmc.assume_enables.get(key)
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def cmd_update_assumptions(self, cmd):
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expr = cmd.get("expr")
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key = cmd.get("key")
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key = mkkey(key)
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result = smtbmc.smt.smt2_assumptions.pop(key, None)
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if expr is not None:
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expr = self.expr_smt(expr, "Bool")
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smtbmc.smt.smt2_assumptions[key] = expr
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return result
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def cmd_get_unsat_assumptions(self, cmd):
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return smtbmc.smt.get_unsat_assumptions(minimize=bool(cmd.get("minimize")))
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def cmd_push(self, cmd):
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smtbmc.smt_push()
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def cmd_pop(self, cmd):
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smtbmc.smt_pop()
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def cmd_check(self, cmd):
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return smtbmc.smt_check_sat()
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def cmd_smtlib(self, cmd):
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command = cmd.get("command")
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response = cmd.get("response", False)
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if not isinstance(command, str):
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raise InteractiveError(
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f"raw SMT-LIB command must be a string, found {json.dumps(command)}"
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)
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smtbmc.smt.write(command)
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if response:
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return smtbmc.smt.read()
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def cmd_define(self, cmd):
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expr = cmd.get("expr")
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if expr is None:
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raise InteractiveError("'define' copmmand requires 'expr' parameter")
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expr, sort = self.expr_smt_and_sort(expr)
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if isinstance(sort, tuple) and sort[0] == "module":
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raise InteractiveError("'define' does not support module sorts")
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define_name = f"|inc def {len(self._define_sorts)}|"
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self._define_sorts[define_name] = sort
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if isinstance(sort, tuple):
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sort = f"(_ {' '.join(map(str, sort))})"
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smtbmc.smt.write(f"(define-const {define_name} {sort} {expr})")
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return {"name": define_name}
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def cmd_design_hierwitness(self, cmd=None):
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allregs = (cmd is None) or bool(cmd.get("allreges", False))
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if self._cached_hierwitness[allregs] is not None:
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return self._cached_hierwitness[allregs]
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inits, seqs, clocks, mems = smtbmc.smt.hierwitness(smtbmc.topmod, allregs)
|
|
self._cached_hierwitness[allregs] = result = dict(
|
|
inits=inits, seqs=seqs, clocks=clocks, mems=mems
|
|
)
|
|
return result
|
|
|
|
def cmd_write_yw_trace(self, cmd):
|
|
steps = cmd.get("steps")
|
|
allregs = bool(cmd.get("allregs", False))
|
|
|
|
if steps is None:
|
|
steps = sorted(self.state_set)
|
|
|
|
path = cmd.get("path")
|
|
|
|
smtbmc.write_yw_trace(steps, self.traceidx, allregs=allregs, filename=path)
|
|
|
|
if path is None:
|
|
self.traceidx += 1
|
|
|
|
def cmd_read_yw_trace(self, cmd):
|
|
steps = cmd.get("steps")
|
|
path = cmd.get("path")
|
|
name = cmd.get("name")
|
|
skip_x = cmd.get("skip_x", False)
|
|
if path is None:
|
|
raise InteractiveError("path required")
|
|
|
|
constraints = defaultdict(list)
|
|
|
|
if steps is None:
|
|
steps = sorted(self.state_set)
|
|
|
|
map_steps = {i: int(j) for i, j in enumerate(steps)}
|
|
|
|
last_step = smtbmc.ywfile_constraints(
|
|
path, constraints, map_steps=map_steps, skip_x=skip_x
|
|
)
|
|
|
|
self._yw_constraints[name] = {
|
|
map_steps.get(i, i): [smtexpr for cexfile, smtexpr in constraint_list]
|
|
for i, constraint_list in constraints.items()
|
|
}
|
|
|
|
return dict(last_step=last_step)
|
|
|
|
def cmd_modinfo(self, cmd):
|
|
fields = cmd.get("fields", [])
|
|
|
|
mod = cmd.get("mod")
|
|
if mod is None:
|
|
mod = smtbmc.topmod
|
|
modinfo = smtbmc.smt.modinfo.get(mod)
|
|
if modinfo is None:
|
|
return None
|
|
|
|
result = dict(name=mod)
|
|
for field in fields:
|
|
result[field] = getattr(modinfo, field, None)
|
|
return result
|
|
|
|
def cmd_ping(self, cmd):
|
|
return cmd
|
|
|
|
cmd_handlers = {
|
|
"new_step": cmd_new_step,
|
|
"assert": cmd_assert,
|
|
"assert_antecedent": cmd_assert,
|
|
"assert_consequent": cmd_assert,
|
|
"assert_design_assumes": cmd_assert_design_assumes,
|
|
"get_design_assume": cmd_get_design_assume,
|
|
"update_assumptions": cmd_update_assumptions,
|
|
"get_unsat_assumptions": cmd_get_unsat_assumptions,
|
|
"push": cmd_push,
|
|
"pop": cmd_pop,
|
|
"check": cmd_check,
|
|
"smtlib": cmd_smtlib,
|
|
"define": cmd_define,
|
|
"design_hierwitness": cmd_design_hierwitness,
|
|
"write_yw_trace": cmd_write_yw_trace,
|
|
"read_yw_trace": cmd_read_yw_trace,
|
|
"modinfo": cmd_modinfo,
|
|
"ping": cmd_ping,
|
|
}
|
|
|
|
def handle_command(self, cmd):
|
|
if not isinstance(cmd, dict) or "cmd" not in cmd:
|
|
raise InteractiveError('object with "cmd" key required')
|
|
|
|
name = cmd.get("cmd", None)
|
|
|
|
handler = self.cmd_handlers.get(name)
|
|
if handler:
|
|
return handler(self, cmd)
|
|
else:
|
|
raise InteractiveError(f"unknown command: {name}")
|
|
|
|
def mainloop(self):
|
|
self.setup()
|
|
while True:
|
|
try:
|
|
cmd = input().strip()
|
|
if not cmd or cmd.startswith("#") or cmd.startswith("//"):
|
|
continue
|
|
try:
|
|
cmd = json.loads(cmd)
|
|
except json.decoder.JSONDecodeError as e:
|
|
self.print_json(err=f"invalid JSON: {e}")
|
|
continue
|
|
except EOFError:
|
|
break
|
|
|
|
try:
|
|
result = self.handle_command(cmd)
|
|
except InteractiveError as e:
|
|
self.print_json(err=str(e))
|
|
continue
|
|
except Exception as e:
|
|
self.print_json(err=f"internal error: {e}")
|
|
raise
|
|
else:
|
|
self.print_json(ok=result)
|