add basic analyze-kconfig script

1 files changed, 112 insertions, 0 deletions

diff --git a/lib/loader/kconfig.py b/lib/loader/kconfig.py
new file mode 100644
index 0000000..1dbebc8
--- /dev/null
+++ b/lib/loader/kconfig.py
@@ -0,0 +1,112 @@
+#!/usr/bin/env python3
+
+import kconfiglib
+from frozendict import frozendict
+import json
+import os
+import subprocess
+
+
+class KConfigAttributes:
+    def __init__(self, kconfig_path, datadir):
+        experiments = list()
+        failed_experiments = list()
+        for direntry in os.listdir(datadir):
+            config_path = f"{datadir}/{direntry}/.config"
+            attr_path = f"{datadir}/{direntry}/attributes.json"
+            metadata_path = f"{datadir}/{direntry}/metadata"
+            if os.path.exists(attr_path):
+                experiments.append((config_path, attr_path))
+            elif os.path.exists(config_path):
+                failed_experiments.append(config_path)
+
+        kconf = kconfiglib.Kconfig(kconfig_path)
+        self.kconf = kconf
+
+        self.kconfig_hash = self.file_hash(kconfig_path)
+        self.kconfig_dir = "unknown"
+        if "/" in kconfig_path:
+            self.kconfig_dir = kconfig_path.split("/")[-2]
+
+        self.symbol_names = sorted(
+            map(
+                lambda sym: sym.name,
+                filter(
+                    lambda sym: kconfiglib.TYPE_TO_STR[sym.type]
+                    in ("bool", "tristate", "int", "string", "hex"),
+                    kconf.syms.values(),
+                ),
+            )
+        )
+
+        self.choice_names = sorted(
+            map(lambda choice: choice.name or choice.name_and_loc, kconf.choices)
+        )
+
+        self.choice = dict()
+        self.choice_symbol_names = list()
+        for choice in kconf.choices:
+            self.choice[choice.name or choice.name_and_loc] = choice
+            self.choice_symbol_names.extend(map(lambda sym: sym.name, choice.syms))
+
+        self.symbol = dict()
+        for symbol_name in self.symbol_names:
+            self.symbol[symbol_name] = kconf.syms[symbol_name]
+
+        if int(os.getenv("DFATOOL_KCONF_WITH_CHOICE_NODES", 1)):
+            for sym_name in self.choice_symbol_names:
+                self.symbol_names.remove(sym_name)
+            self.param_names = self.symbol_names + self.choice_names
+        else:
+            self.param_names = self.symbol_names
+
+        self.data = list()
+        self.configs = list()
+        self.failures = list()
+
+        for config_path, attr_path in experiments:
+            self.configs.append(config_path)
+            kconf.load_config(config_path)
+            with open(attr_path, "r") as f:
+                attr = json.load(f)
+
+            param = self._conf_to_param()
+            self.data.append((frozendict(param), attr))
+
+        for config_path in failed_experiments:
+            kconf.load_config(config_path)
+            param = self._conf_to_param()
+            self.failures.append(frozendict(param))
+
+    def _conf_to_param(self):
+        param = dict()
+        for sym_name in self.symbol_names:
+            sym = self.kconf.syms[sym_name]
+            if not sym.visibility and sym.str_value == "":
+                param[sym_name] = None
+            elif kconfiglib.TYPE_TO_STR[sym.type] in ("int", "hex"):
+                try:
+                    param[sym_name] = int(sym.str_value, base=0)
+                except ValueError:
+                    print(
+                        f"Warning: Illegal value for {sym.__repr__()}, defaulting to None"
+                    )
+                    param[sym_name] = None
+            else:
+                param[sym_name] = sym.str_value
+        for choice in self.choice_names:
+            if self.choice[choice].selection is None:
+                param[choice] = None
+            else:
+                param[choice] = self.choice[choice].selection.name
+        return param
+
+    def file_hash(self, config_file):
+        status = subprocess.run(
+            ["sha256sum", config_file],
+            stdout=subprocess.PIPE,
+            stderr=subprocess.PIPE,
+            universal_newlines=True,
+        )
+        sha256sum = status.stdout.split()[0]
+        return sha256sum