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270 lines
11 KiB
Python
270 lines
11 KiB
Python
#
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# SymbiYosys (sby) -- Front-end for Yosys-based formal verification flows
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#
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# Copyright (C) 2016 Claire Xenia Wolf <claire@yosyshq.com>
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#
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# Permission to use, copy, modify, and/or distribute this software for any
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# purpose with or without fee is hereby granted, provided that the above
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# copyright notice and this permission notice appear in all copies.
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#
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# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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#
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import re, os, getopt, click, json
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from sby_core import SbyProc
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from sby_sim import sim_witness_trace
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def run(mode, task, engine_idx, engine):
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opts, solver_args = getopt.getopt(engine[1:], "", [])
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if len(solver_args) == 0:
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task.error("Missing solver command.")
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for o, a in opts:
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task.error("Unexpected AIGER engine options.")
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status_2 = "UNKNOWN"
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model_variant = ""
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json_output = False
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if solver_args[0] == "suprove":
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if mode not in ["live", "prove"]:
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task.error("The aiger solver 'suprove' is only supported in live and prove modes.")
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if mode == "live" and (len(solver_args) == 1 or solver_args[1][0] != "+"):
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solver_args.insert(1, "+simple_liveness")
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solver_cmd = " ".join([task.exe_paths["suprove"]] + solver_args[1:])
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elif solver_args[0] == "avy":
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model_variant = "_fold"
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if mode != "prove":
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task.error("The aiger solver 'avy' is only supported in prove mode.")
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solver_cmd = " ".join([task.exe_paths["avy"], "--cex", "-"] + solver_args[1:])
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elif solver_args[0] == "rIC3":
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if mode != "prove":
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task.error("The aiger solver 'rIC3' is only supported in prove mode.")
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solver_cmd = " ".join([task.exe_paths["rIC3"], "--witness"] + solver_args[1:])
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elif solver_args[0] == "aigbmc":
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if mode != "bmc":
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task.error("The aiger solver 'aigbmc' is only supported in bmc mode.")
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solver_cmd = " ".join([task.exe_paths["aigbmc"], str(task.opt_depth - 1)] + solver_args[1:])
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status_2 = "PASS" # aigbmc outputs status 2 when BMC passes
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elif solver_args[0] == "imctk-eqy-engine":
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model_variant = "_fold"
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json_output = True
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if mode != "prove":
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task.error("The aiger solver 'imctk-eqy-engine' is only supported in prove mode.")
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args = ["--bmc-depth", str(task.opt_depth), "--jsonl-output"]
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solver_cmd = " ".join([task.exe_paths["imctk-eqy-engine"], *args, *solver_args[1:]])
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else:
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task.error(f"Invalid solver command {solver_args[0]}.")
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smtbmc_vcd = task.opt_vcd and not task.opt_vcd_sim
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run_aigsmt = (mode != "live") and (smtbmc_vcd or (task.opt_append and task.opt_append_assume))
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smtbmc_append = 0
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sim_append = 0
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log = task.log_prefix(f"engine_{engine_idx}")
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if mode != "live":
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if task.opt_append_assume:
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smtbmc_append = task.opt_append
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elif smtbmc_vcd:
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if not task.opt_append_assume:
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log("For VCDs generated by smtbmc the option 'append_assume off' is ignored")
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smtbmc_append = task.opt_append
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else:
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sim_append = task.opt_append
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proc = SbyProc(
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task,
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f"engine_{engine_idx}",
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task.model(f"aig{model_variant}"),
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f"cd {task.workdir}; {solver_cmd} model/design_aiger{model_variant}.aig",
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logfile=open(f"{task.workdir}/engine_{engine_idx}/logfile.txt", "w")
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)
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if solver_args[0] not in ["avy", "rIC3"]:
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proc.checkretcode = True
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proc_status = None
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produced_cex = False
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end_of_cex = False
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aiw_file = open(f"{task.workdir}/engine_{engine_idx}/trace.aiw", "w")
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def output_callback(line):
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nonlocal proc_status
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nonlocal produced_cex
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nonlocal end_of_cex
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if json_output:
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# Forward log messages, but strip the prefix containing runtime and memory stats
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if not line.startswith('{'):
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print(line, file=proc.logfile, flush=True)
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matched = re.match(r".*(TRACE|DEBUG|INFO|WARN|ERROR) (.*)", line)
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if matched:
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if matched[1] == "INFO":
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task.log(matched[2])
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else:
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task.log(f"{matched[1]} {matched[2]}")
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return None
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event = json.loads(line)
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if "aiw" in event:
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print(event["aiw"], file=aiw_file)
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if "status" in event:
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if event["status"] == "pass":
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proc_status = "PASS"
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elif event["status"] == "fail":
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proc_status = "FAIL"
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return None
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if proc_status is not None:
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if not end_of_cex and not produced_cex and line.isdigit():
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produced_cex = True
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if not end_of_cex:
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print(line, file=aiw_file)
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if line == ".":
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end_of_cex = True
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return None
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if line.startswith("u"):
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return f"No CEX up to depth {int(line[1:])-1}."
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if line in ["0", "1", "2"]:
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print(line, file=aiw_file)
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if line == "0": proc_status = "PASS"
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if line == "1": proc_status = "FAIL"
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if line == "2": proc_status = status_2
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return None
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def exit_callback(retcode):
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aiw_file.close()
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aigsmt_exit_callback(task, engine_idx, proc_status,
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run_aigsmt=run_aigsmt, smtbmc_vcd=smtbmc_vcd, smtbmc_append=smtbmc_append, sim_append=sim_append, )
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proc.output_callback = output_callback
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proc.register_exit_callback(exit_callback)
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def aigsmt_exit_callback(task, engine_idx, proc_status, *, run_aigsmt, smtbmc_vcd, smtbmc_append, sim_append):
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if proc_status is None:
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task.error(f"engine_{engine_idx}: Could not determine engine status.")
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task.update_status(proc_status)
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task.summary.set_engine_status(engine_idx, proc_status)
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task.terminate()
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if proc_status == "FAIL" and (not run_aigsmt or task.opt_aigsmt != "none"):
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aigsmt_trace_callback(task, engine_idx, proc_status, run_aigsmt=run_aigsmt, smtbmc_vcd=smtbmc_vcd, smtbmc_append=smtbmc_append, sim_append=sim_append)
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def aigsmt_trace_callback(task, engine_idx, proc_status, *, run_aigsmt, smtbmc_vcd, smtbmc_append, sim_append, name="trace"):
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trace_prefix = f"engine_{engine_idx}/{name}"
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aiw2yw_suffix = '_aiw' if run_aigsmt else ''
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witness_proc = SbyProc(
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task, f"engine_{engine_idx}", [],
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f"cd {task.workdir}; {task.exe_paths['witness']} aiw2yw engine_{engine_idx}/{name}.aiw model/design_aiger.ywa engine_{engine_idx}/{name}{aiw2yw_suffix}.yw",
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)
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final_proc = witness_proc
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if run_aigsmt:
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smtbmc_opts = []
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smtbmc_opts += ["-s", task.opt_aigsmt]
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if task.opt_tbtop is not None:
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smtbmc_opts += ["--vlogtb-top", task.opt_tbtop]
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smtbmc_opts += ["--noprogress", f"--append {smtbmc_append}"]
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if smtbmc_vcd:
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smtbmc_opts += [f"--dump-vcd {trace_prefix}.vcd"]
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smtbmc_opts += [f"--dump-yw {trace_prefix}.yw", f"--dump-vlogtb {trace_prefix}_tb.v", f"--dump-smtc {trace_prefix}.smtc"]
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proc2 = SbyProc(
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task,
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f"engine_{engine_idx}",
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[*task.model("smt2"), witness_proc],
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f"cd {task.workdir}; {task.exe_paths['smtbmc']} {' '.join(smtbmc_opts)} --yw engine_{engine_idx}/{name}{aiw2yw_suffix}.yw model/design_smt2.smt2",
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logfile=open(f"{task.workdir}/engine_{engine_idx}/logfile2.txt", "w"),
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)
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proc2_status = None
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last_prop = []
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current_step = None
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def output_callback2(line):
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nonlocal proc2_status
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nonlocal last_prop
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nonlocal current_step
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smt2_trans = {'\\':'/', '|':'/'}
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def parse_mod_path(path_string):
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# Match a path with . as delimiter, allowing escaped tokens in
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# verilog `\name ` format
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return [m[1] or m[0] for m in re.findall(r"(\\([^ ]*) |[^\.]+)(?:\.|$)", path_string)]
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match = re.match(r"^## [0-9: ]+ .* in step ([0-9]+)\.\.", line)
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if match:
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current_step = int(match[1])
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return line
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match = re.match(r"^## [0-9: ]+ Status: FAILED", line)
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if match: proc2_status = "FAIL"
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match = re.match(r"^## [0-9: ]+ Status: PASSED", line)
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if match: proc2_status = "PASS"
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match = re.match(r"^## [0-9: ]+ Assert failed in ([^:]+): (\S+)(?: \((\S+)\))?", line)
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if match:
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path = parse_mod_path(match[1])
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cell_name = match[3] or match[2]
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prop = task.design.hierarchy.find_property(path, cell_name, trans_dict=smt2_trans)
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prop.status = "FAIL"
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task.status_db.set_task_property_status(prop, data=dict(source="aigsmt", engine=f"engine_{engine_idx}"))
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last_prop.append(prop)
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return line
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match = re.match(r"^## [0-9: ]+ Writing trace to VCD file: (\S+)", line)
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if match:
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tracefile = match[1]
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trace = os.path.basename(tracefile)[:-4]
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task.summary.add_event(engine_idx=engine_idx, trace=trace, path=tracefile)
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if match and last_prop:
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for p in last_prop:
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task.summary.add_event(
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engine_idx=engine_idx, trace=trace,
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type=p.celltype, hdlname=p.hdlname, src=p.location, step=current_step)
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p.tracefiles.append(tracefile)
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last_prop = []
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return line
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return line
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def exit_callback2(retcode):
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if proc2_status is None:
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task.error(f"engine_{engine_idx}: Could not determine aigsmt status.")
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if proc2_status != "FAIL":
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task.error(f"engine_{engine_idx}: Unexpected aigsmt status.")
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proc2.output_callback = output_callback2
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proc2.register_exit_callback(exit_callback2)
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final_proc = proc2
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if task.opt_fst or (task.opt_vcd and task.opt_vcd_sim):
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final_proc = sim_witness_trace(f"engine_{engine_idx}", task, engine_idx, f"engine_{engine_idx}/{name}.yw", append=sim_append, deps=[final_proc])
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elif not run_aigsmt:
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task.log(f"{click.style(f'engine_{engine_idx}', fg='magenta')}: Engine did not produce a counter example.")
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return final_proc
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