File size: 10,106 Bytes
fa19039 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 | #!/usr/bin/env python3
"""Export source-owned concrete function identities using the pinned DWARF reader.
This packages facts, not scores. dSYM use here does not add DecBench metric support.
"""
import argparse, collections, hashlib, json, sys, shlex
from pathlib import Path
from elftools.elf.elffile import ELFFile
import lief
from decbench.utils.binfmt import _build_dwarfinfo, die_attr_owner, die_str_attr
from decbench.utils.native_code import die_ranges
from decbench.metrics.type_match import _parse_function_die
def decode(value):
return value.decode("utf-8", "replace") if isinstance(value, bytes) else str(value)
def main():
ap = argparse.ArgumentParser()
ap.add_argument("status", type=Path)
ap.add_argument("--stage", type=Path, required=True)
ap.add_argument("--sources", type=Path, required=True)
a = ap.parse_args()
s = json.loads(a.status.read_text())
binary = a.stage / s["binary"]
source = (a.sources / s["project"]).resolve()
rows = []
f = None
try:
if s["platform"] == "macos":
db = (
binary.with_name(binary.name + ".dSYM")
/ "Contents/Resources/DWARF"
/ binary.name
)
b = lief.parse(str(db))
sections = {
"." + x.name[2:]: bytes(x.content)
for x in b.sections
if x.segment_name == "__DWARF"
}
if ".debug_str_offs" in sections:
sections[".debug_str_offsets"] = sections.pop(".debug_str_offs")
dw = _build_dwarfinfo(sections, True, 8, "AArch64")
else:
f = binary.open("rb")
elf = ELFFile(f)
dw = elf.get_dwarf_info()
image = lief.parse(str(binary))
executable = []
for section in image.sections:
if (s["platform"] == "macos" and section.name == "__text") or (
s["platform"] == "linux" and int(section.flags) & 4
):
executable.append(
(
section.virtual_address,
section.virtual_address + len(section.content),
)
)
assert executable, "No file-backed executable sections"
producer = set()
owned_cus = 0
all_concrete = 0
rejected_unmapped = 0
compile_sources = {}
if s["platform"] == "macos":
for command in json.loads(
(a.status.parent / "compile_commands.json").read_text()
):
original = Path(command["file"]).resolve()
args = command.get("arguments") or shlex.split(command["command"])
output = (
args[args.index("-o") + 1]
if "-o" in args
else command.get("output")
)
aliases = [original]
if output:
object_file = Path(command["directory"]) / output
stem = object_file.with_suffix("")
aliases.extend([stem, Path(str(stem) + ".ii")])
for alias in aliases:
alias = alias.resolve()
prior = compile_sources.get(alias)
assert (
prior is None or prior == original
), "Conflicting compile-command TU identity"
compile_sources[alias] = original
for cu in dw.iter_CUs():
top = cu.get_top_DIE()
name = decode(top.attributes["DW_AT_name"].value)
comp = (
decode(top.attributes.get("DW_AT_comp_dir").value)
if top.attributes.get("DW_AT_comp_dir")
else ""
)
producer.add(decode(top.attributes["DW_AT_producer"].value))
if s["platform"] == "macos":
tu = (
(Path(comp) / name).resolve()
if not Path(name).is_absolute()
else Path(name).resolve()
)
tu = compile_sources.get(tu, tu)
owned = (
tu.is_relative_to(source)
and "third_party" not in tu.relative_to(source).parts
and "deps" not in tu.relative_to(source).parts
)
else:
# Existing raw build pipeline clones each project to a temp src root.
# This is CU ownership only; function declaration paths remain raw evidence.
tu = Path(name) if Path(name).is_absolute() else Path(comp) / name
owned = (
"/src/" in tu.as_posix()
and "third_party" not in tu.parts
and "deps" not in tu.parts
)
if not owned:
continue
owned_cus += 1
for die in cu.iter_DIEs():
if die.tag != "DW_TAG_subprogram":
continue
ranges = die_ranges(die, dw)
if not ranges:
continue
if not all(
any(begin >= lo and end <= hi for lo, hi in executable)
for begin, end in ranges
):
rejected_unmapped += 1
continue
all_concrete += 1
if s["platform"] == "macos":
attr, owner = die_attr_owner(
die, "DW_AT_decl_file", follow_abstract_origin=True
)
if attr is None:
continue
lp = dw.line_program_for_CU(owner.cu)
version = lp.header["version"]
file_index = int(attr.value) - (0 if version >= 5 else 1)
files = lp["file_entry"]
if not 0 <= file_index < len(files):
continue
entry = files[file_index]
decl = Path(decode(entry.name))
directory_index = int(entry.dir_index) - (0 if version >= 5 else 1)
if not decl.is_absolute() and 0 <= directory_index < len(
lp["include_directory"]
):
decl = (
Path(decode(lp["include_directory"][directory_index]))
/ decl
)
if not decl.is_absolute():
decl = Path(comp) / decl
decl = decl.resolve()
if not decl.is_relative_to(source) or {"third_party", "deps"} & set(
decl.relative_to(source).parts
):
continue
fname, variables = _parse_function_die(die, dw)
if not fname:
continue
low = min(begin for begin, end in ranges)
link = die_str_attr(
die, "DW_AT_linkage_name", follow_abstract_origin=True
) or die_str_attr(
die, "DW_AT_MIPS_linkage_name", follow_abstract_origin=True
)
rows.append(
{
"binary_sha256": s["binary_sha256"],
"address": low,
"ranges": ranges,
"name": fname,
"linkage_name": link if link else None,
"source_tu": str(tu),
"die_offset": die.offset,
"variables": variables,
}
)
assert rows, "No source-owned named concrete function records"
counts = collections.Counter(x["name"] for x in rows)
for row in rows:
row["storage_key"] = (
row["name"]
if counts[row["name"]] == 1
else row["name"] + "@0x" + format(row["address"], "x")
)
result = {
"schema": "decbench-cpp-dwarf-evidence-v2",
"platform": s["platform"],
"project": s["project"],
"source_owned_cus": owned_cus,
"concrete_records_before_name_resolution": all_concrete,
"named_records": len(rows),
"unique_entry_addresses": len({x["address"] for x in rows}),
"rejected_unmapped_range_records": rejected_unmapped,
"producer": sorted(producer),
"ownership_method": (
"exact-native-source-root"
if s["platform"] == "macos"
else "raw-build-temp-src-layout; header-defined functions may include dependencies"
),
"source_level_and_abi_type_policy": "raw DWARF variable spellings/storage retained; no higher-level correctness scoring policy",
"functions": rows,
}
(a.status.parent / "dwarf-functions.json").write_text(
json.dumps(result, indent=2)
)
s.pop("dwarf_evidence_error", None)
s["source_owned_function_records"] = len(rows)
s["source_owned_cus"] = owned_cus
s["unique_source_entry_addresses"] = len({x["address"] for x in rows})
s["rejected_unmapped_range_records"] = rejected_unmapped
s["debug_producers"] = sorted(producer)
s["remaining_gates"] = [
x
for x in s["remaining_gates"]
if "function index" not in x and "function identity extraction" not in x
]
except Exception as e:
s["dwarf_evidence_error"] = str(e)
finally:
if f:
f.close()
a.status.write_text(json.dumps(s, indent=2))
print(
json.dumps(
{
"status": str(a.status),
"named_records": len(rows),
"error": s.get("dwarf_evidence_error"),
}
),
flush=True,
)
if __name__ == "__main__":
main()
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