results.py

# Copyright 2025 Google LLC
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""The data structure of all result kinds."""
import dataclasses
from typing import Any, Optional

from experiment import textcov
from experiment.benchmark import Benchmark
from experiment.fuzz_target_error import SemanticCheckResult
from experiment.workdir import WorkDirs


class Result:
  """A benchmark generation result."""
  benchmark: Benchmark
  trial: int
  work_dirs: WorkDirs
  fuzz_target_source: str
  build_script_source: str
  author: Any
  chat_history: dict
  _repr_exclude = {'_repr_exclude', 'chat_history'}

  def __init__(self,
               benchmark: Benchmark,
               trial: int,
               work_dirs: WorkDirs,
               fuzz_target_source: str = '',
               build_script_source: str = '',
               author: Any = None,
               chat_history: Optional[dict] = None) -> None:
    self.benchmark = benchmark
    self.trial = trial
    self.work_dirs = work_dirs
    self.fuzz_target_source = fuzz_target_source
    self.build_script_source = build_script_source
    self.author = author
    self.chat_history = chat_history or {}

  def __repr__(self) -> str:
    attributes = [
        f'{k}={v!r}' for k, v in vars(self).items()
        if k not in self._repr_exclude
    ]
    return f'{self.__class__.__name__}({", ".join(attributes)})'

  def to_dict(self) -> dict:
    return {
        'function_signature': self.benchmark.function_signature,
        'project': self.benchmark.project,
        'project_commit': self.benchmark.commit,
        'project_language': self.benchmark.language,
        'trial': self.trial,
        'fuzz_target_source': self.fuzz_target_source,
        'build_script_source': self.build_script_source,
        'author': self.author.name,
        'chat_history': self.chat_history,
    }


# TODO: Make this class an attribute of Result, avoid too many attributes in one
# class.
class BuildResult(Result):
  """A benchmark generation result with build info."""
  compiles: bool  # Build success/failure.
  compile_error: str  # Build error message.
  compile_log: str  # Build full output.
  binary_exists: bool  # Fuzz target binary generated successfully.
  is_function_referenced: bool  # Fuzz target references function-under-test.
  _repr_exclude = Result._repr_exclude | {'compile_log', 'compile_error'}

  def __init__(self,
               benchmark: Benchmark,
               trial: int,
               work_dirs: WorkDirs,
               compiles: bool = False,
               compile_error: str = '',
               compile_log: str = '',
               binary_exists: bool = False,
               is_function_referenced: bool = False,
               fuzz_target_source: str = '',
               build_script_source: str = '',
               author: Any = None,
               chat_history: Optional[dict] = None) -> None:
    super().__init__(benchmark, trial, work_dirs, fuzz_target_source,
                     build_script_source, author, chat_history)
    self.compiles = compiles
    self.compile_error = compile_error
    self.compile_log = compile_log
    self.binary_exists = binary_exists
    self.is_function_referenced = is_function_referenced

  def to_dict(self) -> dict:
    return super().to_dict() | {
        'compiles': self.success,
        'compile_error': self.compile_error,
        'compile_log': self.compile_log,
        'binary_exists': self.binary_exists,
        'is_function_referenced': self.is_function_referenced,
    }

  @property
  def success(self):
    return self.compiles and self.binary_exists and self.is_function_referenced


# TODO: Make this class an attribute of Result, avoid too many attributes in one
# class.
class RunResult(BuildResult):
  """The fuzzing run-time result info."""
  crashes: bool
  run_error: str
  run_log: str
  coverage_summary: dict
  coverage: float
  line_coverage_diff: float
  reproducer_path: str
  textcov_diff: Optional[textcov.Textcov]
  log_path: str
  corpus_path: str
  coverage_report_path: str
  cov_pcs: int
  total_pcs: int
  _repr_exclude = BuildResult._repr_exclude | {'textcov_diff'}

  def __init__(
      self,
      benchmark: Benchmark,
      trial: int,
      work_dirs: WorkDirs,
      compiles: bool = False,
      compile_error: str = '',
      compile_log: str = '',
      binary_exists: bool = False,
      is_function_referenced: bool = False,
      crashes: bool = False,  # Runtime crash.
      run_error: str = '',  # Runtime crash error message.
      run_log: str = '',  # Full fuzzing output.
      coverage_summary: Optional[dict] = None,
      coverage: float = 0.0,
      line_coverage_diff: float = 0.0,
      textcov_diff: Optional[textcov.Textcov] = None,
      reproducer_path: str = '',
      log_path: str = '',
      corpus_path: str = '',
      coverage_report_path: str = '',
      cov_pcs: int = 0,
      total_pcs: int = 0,
      fuzz_target_source: str = '',
      build_script_source: str = '',
      author: Any = None,
      chat_history: Optional[dict] = None) -> None:
    super().__init__(benchmark, trial, work_dirs, compiles, compile_error,
                     compile_log, binary_exists, is_function_referenced,
                     fuzz_target_source, build_script_source, author,
                     chat_history)
    self.crashes = crashes
    self.run_error = run_error
    self.run_log = run_log
    self.coverage_summary = coverage_summary or {}
    self.coverage = coverage
    self.line_coverage_diff = line_coverage_diff
    self.reproducer_path = reproducer_path
    self.textcov_diff = textcov_diff
    self.log_path = log_path
    self.corpus_path = corpus_path
    self.coverage_report_path = coverage_report_path
    self.cov_pcs = cov_pcs
    self.total_pcs = total_pcs

  def to_dict(self) -> dict:
    return super().to_dict() | {
        'crashes':
            self.crashes,
        'run_error':
            self.run_error,
        'run_log':
            self.run_log,
        'coverage_summary':
            self.coverage_summary or {},
        'coverage':
            self.coverage,
        'line_coverage_diff':
            self.line_coverage_diff,
        'reproducer_path':
            self.reproducer_path,
        'textcov_diff':
            dataclasses.asdict(self.textcov_diff) if self.textcov_diff else '',
        'log_path':
            self.log_path,
        'corpus_path':
            self.corpus_path,
        'coverage_report_path':
            self.coverage_report_path,
        'cov_pcs':
            self.cov_pcs,
        'total_pcs':
            self.total_pcs,
    }

  # TODO(dongge): Define success property to show if the fuzz target was run.


class CrashResult(RunResult):
  """The fuzzing run-time result with crash info."""
  stacktrace: str
  true_bug: bool  # True/False positive crash
  insight: str  # Reason and fixes for crashes


class CoverageResult(RunResult):
  """The fuzzing run-time result with code coverage info."""
  coverage_percentage: float
  coverage_reports: dict[str, str]  # {source_file: coverage_report_content}
  insight: str  # Reason and fixes for low coverage


# TODO: Make this class an attribute of Result, avoid too many attributes in one
# class.
class AnalysisResult(Result):
  """Analysis of the fuzzing run-time result."""
  run_result: RunResult
  semantic_result: SemanticCheckResult
  crash_result: Optional[CrashResult]
  coverage_result: Optional[CoverageResult]

  def __init__(self,
               author: Any,
               run_result: RunResult,
               semantic_result: SemanticCheckResult,
               crash_result: Optional[CrashResult] = None,
               coverage_result: Optional[CoverageResult] = None,
               chat_history: Optional[dict] = None) -> None:
    super().__init__(run_result.benchmark, run_result.trial,
                     run_result.work_dirs, run_result.fuzz_target_source,
                     run_result.build_script_source, author, chat_history)
    self.run_result = run_result
    self.semantic_result = semantic_result
    self.crash_result = crash_result
    self.coverage_result = coverage_result

  def to_dict(self) -> dict:
    return self.run_result.to_dict() | {
        'semantic_result': self.semantic_result.to_dict(),
        'crash_result': self.crash_result,
        'coverage_result': self.coverage_result,
    }

  @property
  def success(self) -> bool:
    return not self.semantic_result.has_err

  @property
  def crashes(self) -> bool:
    return self.run_result.crashes

  @property
  def coverage(self) -> float:
    return self.run_result.coverage

  @property
  def line_coverage_diff(self) -> float:
    return self.run_result.line_coverage_diff

  @property
  def run_log(self) -> str:
    return self.run_result.run_log

  @property
  def log_path(self) -> str:
    return self.run_result.log_path


class TrialResult:
  """All history results for a trial of a benchmark in an experiment."""
  benchmark: Benchmark
  trial: int
  work_dirs: WorkDirs
  result_history: list[Result]

  def __init__(self,
               benchmark: Benchmark,
               trial: int,
               work_dirs: WorkDirs,
               result_history: Optional[list[Result]] = None) -> None:
    self.benchmark = benchmark
    self.trial = trial
    self.work_dirs = work_dirs
    self.result_history = result_history or []

  @property
  def function_signature(self) -> str:
    """Function signature of the benchmark."""
    return self.benchmark.function_signature

  @property
  def project(self) -> str:
    """Project name of the benchmark."""
    return self.benchmark.project

  @property
  def project_commit(self) -> str:
    """Project commit of the benchmark."""
    return self.benchmark.commit or ''

  @property
  def project_language(self) -> str:
    """Project language of the benchmark."""
    return self.benchmark.language

  @property
  def best_analysis_result(self) -> Optional[AnalysisResult]:
    """Last AnalysisResult in trial, prefer crashed and a non-semantic error."""
    # 1. Crashed for a non-semantic error
    for result in self.result_history[::-1]:
      if (isinstance(result, AnalysisResult) and result.crashes and
          not result.semantic_result.has_err):
        return result

    # 2. Crashed
    for result in self.result_history[::-1]:
      if isinstance(result, AnalysisResult) and result.crashes:
        return result

    # 3. AnalysisResult
    for result in self.result_history[::-1]:
      if isinstance(result, AnalysisResult):
        return result
    return None

  @property
  def best_result(self) -> Result:
    """Best result in trial based on coverage."""
    # Preference order:
    #   1. Highest coverage diff (AnalysisResult)
    #   2. Highest coverage diff (RunResult)
    #   3. Highest coverage (AnalysisResult)
    #   3. Highest coverage (RunResult)
    #   4. Last Build success (BuildResult)
    #   5. Last Result
    best_result = None

    max_cov_diff = 0
    for result in self.result_history:
      if (isinstance(result, (RunResult, AnalysisResult)) and
          result.line_coverage_diff >= max_cov_diff):
        max_cov_diff = result.line_coverage_diff
        best_result = result
    if best_result:
      return best_result

    max_cov = 0
    for result in self.result_history:
      if (isinstance(result, (RunResult, AnalysisResult)) and
          result.coverage >= max_cov):
        max_cov = result.coverage
        best_result = result
    if best_result:
      return best_result

    for result in self.result_history[::-1]:
      if isinstance(result, BuildResult) and result.success:
        return result

    return self.result_history[-1]

  @property
  def fuzz_target_source(self) -> str:
    """The best fuzz target source code."""
    result = self.best_result
    if isinstance(result, AnalysisResult):
      return result.run_result.fuzz_target_source
    return self.best_result.fuzz_target_source

  @property
  def build_script_source(self) -> str:
    """The best build script source code."""
    result = self.best_result
    if isinstance(result, AnalysisResult):
      return result.run_result.build_script_source
    return self.best_result.build_script_source

  @property
  def author(self) -> Any:
    """The author of the best result."""
    return self.best_result.author

  @property
  def chat_history(self) -> dict:
    """The chat history of the best result."""
    return self.best_result.chat_history

  @property
  def build_success(self) -> bool:
    """True if there is any build success."""
    return any(result.success
               for result in self.result_history
               if isinstance(result, BuildResult))

  @property
  def crashes(self) -> bool:
    """True if there is any runtime crash."""
    return any(result.crashes
               for result in self.result_history
               if isinstance(result, RunResult))

  @property
  def coverage(self) -> float:
    """Max line coverage diff."""
    return max((result.coverage
                for result in self.result_history
                if isinstance(result, RunResult)),
               default=0)

  @property
  def line_coverage_diff(self) -> float:
    """Max line coverage diff."""
    return max((result.line_coverage_diff
                for result in self.result_history
                if isinstance(result, RunResult)),
               default=0)

  @property
  def cov_pcs(self) -> int:
    """Log path of the best result if it is RunResult."""
    return max((result.cov_pcs
                for result in self.result_history
                if isinstance(result, RunResult)),
               default=0)

  @property
  def total_pcs(self) -> int:
    """Log path of the best result if it is RunResult."""
    return max((result.total_pcs
                for result in self.result_history
                if isinstance(result, RunResult)),
               default=0)

  @property
  def line_coverage_report(self) -> str:
    """Max line coverage diff report."""
    for result in self.result_history:
      if not isinstance(result, RunResult):
        continue
      if result.line_coverage_diff == self.line_coverage_diff:
        return result.coverage_report_path
    return ''

  @property
  def textcov_diff(self) -> textcov.Textcov:
    """Sum textcov diff."""
    all_textcov = textcov.Textcov()
    for result in self.result_history:
      if isinstance(result, RunResult) and result.textcov_diff:
        all_textcov.merge(result.textcov_diff)
    return all_textcov

  @property
  def run_error(self) -> str:
    """Run error of the best result if it is RunResult."""
    result = self.best_result
    if isinstance(result, RunResult):
      return result.run_error
    if isinstance(result, AnalysisResult):
      return result.run_result.run_error
    return ''

  @property
  def run_log(self) -> str:
    """Run log of the best result if it is RunResult."""
    result = self.best_result
    if isinstance(result, (RunResult, AnalysisResult)):
      return result.run_log
    return ''

  @property
  def log_path(self) -> str:
    """Log path of the best result if it is RunResult."""
    result = self.best_result
    if isinstance(result, (RunResult, AnalysisResult)):
      return result.log_path
    return ''

  @property
  def is_semantic_error(self) -> bool:
    """Validates if the best AnalysisResult has semantic error."""
    result = self.best_analysis_result
    if result:
      return result.semantic_result.has_err
    return False

  @property
  def semantic_error(self) -> str:
    """Semantic error type of the best AnalysisResult."""
    result = self.best_analysis_result
    if result:
      return result.semantic_result.type
    return '-'

  def to_dict(self) -> dict:
    return {
        'trial':
            self.trial,
        'function_signature':
            self.function_signature,
        'project':
            self.project,
        'project_commit':
            self.project_commit,
        'project_language':
            self.project_language,
        'fuzz_target_source':
            self.fuzz_target_source,
        'build_script_source':
            self.build_script_source,
        'author':
            self.author.name,
        'chat_history':
            self.chat_history,
        'compiles':
            self.build_success,
        'crashes':
            self.crashes,
        'coverage':
            self.coverage,
        'line_coverage_diff':
            self.line_coverage_diff,
        'cov_pcs':
            self.cov_pcs,
        'total_pcs':
            self.total_pcs,
        'line_coverage_report':
            self.line_coverage_report,
        'textcov_diff':
            dataclasses.asdict(self.textcov_diff) if self.textcov_diff else '',
        'run_error':
            self.run_error,
        'run_log':
            self.run_log,
        'log_path':
            self.log_path,
        'is_semantic_error':
            self.is_semantic_error,
        'semantic_error':
            self.semantic_error,
    }


class BenchmarkResult:
  """All trial results for a benchmark in an experiment."""
  benchmark: Benchmark
  work_dirs: WorkDirs
  trial_results: list[TrialResult]

  def __init__(self,
               benchmark: Benchmark,
               work_dirs: WorkDirs,
               trial_results: Optional[list[TrialResult]] = None) -> None:
    self.benchmark = benchmark
    self.work_dirs = work_dirs
    self.trial_results = trial_results or []

  @property
  def trial_count(self) -> int:
    """Total number of trials."""
    return len(self.trial_results)

  @property
  def build_success_count(self) -> int:
    """Build success count."""
    return sum(result.build_success for result in self.trial_results)

  @property
  def build_success_rate(self) -> float:
    """Build success Ratio."""
    if self.trial_count == 0:
      return 0
    return self.build_success_count / self.trial_count

  @property
  def crash_rate(self) -> float:
    """True if there is any run crash not caused by semantic error."""
    if self.trial_count == 0:
      return 0
    return sum(
        result.crashes for result in self.trial_results) / self.trial_count

  @property
  def coverage(self) -> float:
    """Max line coverage diff."""
    return max((result.coverage for result in self.trial_results), default=0)

  @property
  def line_coverage_diff(self) -> float:
    """Max line coverage diff."""
    return max((result.line_coverage_diff for result in self.trial_results),
               default=0)

  @property
  def line_coverage_report(self) -> str:
    """Max line coverage diff report."""
    for result in self.trial_results:
      if result.line_coverage_diff == self.line_coverage_diff:
        return result.line_coverage_report
    return ''

  @property
  def textcov_diff(self) -> textcov.Textcov:
    """Sum textcov diff."""
    all_textcov = textcov.Textcov()
    for result in self.trial_results:
      all_textcov.merge(result.textcov_diff)
    return all_textcov