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#!/usr/bin/env python3
import kconfiglib
import logging
import os
import re
import shutil
import subprocess
from versuchung.experiment import Experiment
from versuchung.types import String, Bool, Integer
from versuchung.files import File, Directory
logger = logging.getLogger(__name__)
class AttributeExperiment(Experiment):
outputs = {
"config": File(".config"),
"attributes": File("attributes.json"),
"build_out": File("build.out"),
"build_err": File("build.err"),
}
def run(self):
build_command = self.build_command.value.split()
attr_command = self.attr_command.value.split()
shutil.copyfile(f"{self.project_root.path}/.config", self.config.path)
subprocess.check_call(
["make", "clean"],
cwd=self.project_root.path,
stdout=subprocess.PIPE,
stderr=subprocess.PIPE,
)
try:
with open(self.build_out.path, "w") as out_fd, open(
self.build_err.path, "w"
) as err_fd:
subprocess.check_call(
build_command,
cwd=self.project_root.path,
stdout=out_fd,
stderr=err_fd,
)
except subprocess.CalledProcessError:
logger.info("build error")
return
with open(self.attributes.path, "w") as attr_fd:
subprocess.check_call(
attr_command, cwd=self.project_root.path, stdout=attr_fd
)
class RandomConfig(AttributeExperiment):
inputs = {
"randconfig_seed": String("FIXME"),
"kconfig_hash": String("FIXME"),
"project_root": Directory("/tmp"),
"project_version": String("FIXME"),
"clean_command": String("make clean"),
"build_command": String("make"),
"attr_command": String("make attributes"),
}
class ExploreConfig(AttributeExperiment):
inputs = {
"config_hash": String("FIXME"),
"kconfig_hash": String("FIXME"),
"project_root": Directory("/tmp"),
"project_version": String("FIXME"),
"clean_command": String("make clean"),
"build_command": String("make"),
"attr_command": String("make attributes"),
}
class KConfig:
def __init__(self, working_directory):
self.cwd = working_directory
self.clean_command = "make clean"
self.build_command = "make"
self.attribute_command = "make attributes"
self.randconfig_command = "make randconfig"
self.kconfig = "Kconfig"
def randconfig(self):
status = subprocess.run(
self.randconfig_command.split(),
cwd=self.cwd,
stdout=subprocess.PIPE,
stderr=subprocess.PIPE,
universal_newlines=True,
)
# make randconfig occasionally generates illegal configurations, so a project may run randconfig more than once.
# Make sure to return the seed of the latest run (don't short-circuit).
seed = None
for line in status.stderr.split("\n"):
match = re.match("KCONFIG_SEED=(.*)", line)
if match:
seed = match.group(1)
if seed:
return seed
raise RuntimeError("KCONFIG_SEED not found")
def git_commit_id(self):
status = subprocess.run(
["git", "rev-parse", "HEAD"],
cwd=self.cwd,
stdout=subprocess.PIPE,
stderr=subprocess.PIPE,
universal_newlines=True,
)
revision = status.stdout.strip()
return revision
def file_hash(self, config_file):
status = subprocess.run(
["sha256sum", config_file],
cwd=self.cwd,
stdout=subprocess.PIPE,
stderr=subprocess.PIPE,
universal_newlines=True,
)
sha256sum = status.stdout.split()[0]
return sha256sum
def run_randconfig(self):
"""Run a randomconfig experiment in the selected project. Results are written to the current working directory."""
experiment = RandomConfig()
experiment(
[
"--randconfig_seed",
self.randconfig(),
"--kconfig_hash",
self.file_hash(f"{self.cwd}/{self.kconfig}"),
"--project_version",
self.git_commit_id(),
"--project_root",
self.cwd,
"--clean_command",
self.clean_command,
"--build_command",
self.build_command,
"--attr_command",
self.attribute_command,
]
)
success = os.path.exists(experiment.attributes.path)
return {"success": success, "config_path": experiment.config.path}
def config_is_functional(self, kconf):
for choice in kconf.choices:
if (
not choice.is_optional
and 2 in choice.assignable
and choice.selection is None
):
return False
return True
def run_exploration_from_file(self, config_file):
kconfig_file = f"{self.cwd}/{self.kconfig}"
kconf = kconfiglib.Kconfig(kconfig_file)
kconf.load_config(config_file)
symbols = list(kconf.syms.keys())
experiment = ExploreConfig()
shutil.copyfile(config_file, f"{self.cwd}/.config")
experiment(
[
"--config_hash",
self.file_hash(config_file),
"--kconfig_hash",
self.file_hash(kconfig_file),
"--project_version",
self.git_commit_id(),
"--project_root",
self.cwd,
"--clean_command",
self.clean_command,
"--build_command",
self.build_command,
"--attr_command",
self.attribute_command,
]
)
for symbol in kconf.syms.values():
if kconfiglib.TYPE_TO_STR[symbol.type] != "bool":
continue
if symbol.tri_value == 0 and 2 in symbol.assignable:
logger.debug(f"Set {symbol.name} to y")
symbol.set_value(2)
elif symbol.tri_value == 2 and 0 in symbol.assignable:
logger.debug(f"Set {symbol.name} to n")
symbol.set_value(0)
else:
continue
if not self.config_is_functional(kconf):
logger.debug("Configuration is non-functional")
kconf.load_config(config_file)
continue
kconf.write_config(f"{self.cwd}/.config")
experiment = ExploreConfig()
experiment(
[
"--config_hash",
self.file_hash(f"{self.cwd}/.config"),
"--kconfig_hash",
self.file_hash(kconfig_file),
"--project_version",
self.git_commit_id(),
"--project_root",
self.cwd,
"--clean_command",
self.clean_command,
"--build_command",
self.build_command,
"--attr_command",
self.attribute_command,
]
)
kconf.load_config(config_file)
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