[Findit] Add findit_for_client to do analysis based on client_id

appengine/findit/crash/findit_for_client.py

+# Copyright 2016 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+"""This module is interfacas between clients-specific code and core.
+
+Note, fracas and cracas are almost identical and fracas is an intermidiate
+state while transfering to cracas, so they can be handled in the same code path
+and can be referred to as chromecrash."""
+
+import copy
+import json
+import logging
+
+from google.appengine.ext import ndb
+
+from common import appengine_util
+from common import time_util
+from crash import findit_for_chromecrash
+from crash.type_enums import CrashClient
+from model import analysis_status
+from model.crash.crash_config import CrashConfig
+from model.crash.fracas_crash_analysis import FracasCrashAnalysis
+
+_FINDIT_FRACAS_FEEDBACK_URL_TEMPLATE = '%s/crash/fracas-result-feedback?key=%s'
+
+
+def CheckPolicyForClient(crash_identifiers, chrome_version, signature,
+                         client_id, platform, stack_trace, customized_data):
+  """Checks if args pass client policy and updates parameters."""
+  crash_config = CrashConfig.Get()
+
+  # Cracas and Fracas share the sampe policy.
+  if client_id == CrashClient.FRACAS or client_id == CrashClient.CRACAS:
+    channel = customized_data.get('channel')
+    # TODO(katesonia): Remove the default value after adding validity check to
+    # config.
+    if platform not in crash_config.fracas.get(
+        'supported_platform_list_by_channel', {}).get(channel, []):
+      # Bail out if either the channel or platform is not supported yet.
+      logging.info('Ananlysis of channel %s, platform %s is not supported. '
+                   'No analysis is scheduled for %s',
+                   channel, platform, repr(crash_identifiers))
+      return False, None
+
+    # TODO(katesonia): Remove the default value after adding validity check to
+    # config.
+    for blacklist_marker in crash_config.fracas.get(
+        'signature_blacklist_markers', []):
+      if blacklist_marker in signature:
+        logging.info('%s signature is not supported. '
+                     'No analysis is scheduled for %s', blacklist_marker,
+                     repr(crash_identifiers))
+        return False, None
+
+    # TODO(katesonia): Remove the default value after adding validity check to
+    # config.
+    platform_rename = crash_config.fracas.get('platform_rename', {})
+    platform = platform_rename.get(platform, platform)
+
+  elif client_id == CrashClient.CLUSTERFUZZ:  # pragma: no cover.
+    # TODO(katesonia): Add clusterfuzz policy check.
+    pass
+
+  return True, (crash_identifiers, chrome_version, signature, client_id,
+                platform, stack_trace, customized_data)
+
+
+def GetAnalysisForClient(crash_identifiers, client_id):
+  """Gets analysis entity based on client id."""
+  if client_id == CrashClient.FRACAS:
+    return FracasCrashAnalysis.Get(crash_identifiers)
+  elif client_id == CrashClient.CRACAS:  # pragma: no cover.
+    # TODO(katesonia): Add CracasCrashAnalysis model.
+    return None
+  elif client_id == CrashClient.CLUSTERFUZZ:  # pragma: no cover.
+    # TODO(katesonia): Add ClusterfuzzCrashAnalysis model.
+    return None
+
+  return None
+
+
+def CreateAnalysisForClient(crash_identifiers, client_id):
+  """Creates analysis entity based on client id."""
+  if client_id == CrashClient.FRACAS:
+    return FracasCrashAnalysis.Create(crash_identifiers)
+  elif client_id == CrashClient.CRACAS:  # pragma: no cover.
+    # TODO(katesonia): define CracasCrashAnalysis.
+    return None
+  elif client_id == CrashClient.CLUSTERFUZZ: # pragma: no cover.
+    # TODO(katesonia): define ClusterfuzzCrashAnalysis.
+    return None
+
+  return None
+
+
+def SetAnalysis(analysis, chrome_version, signature,
+                client_id, platform, stack_trace, customized_data):
+  """Sets necessary info in the analysis for findit to run analysis."""
+  analysis.Reset()
+
+  # Set common properties.
+  analysis.crashed_version = chrome_version
+  analysis.stack_trace = stack_trace
+  analysis.signature = signature
+  analysis.platform = platform
+  analysis.client_id = client_id
+
+  if client_id == CrashClient.FRACAS or client_id == CrashClient.CRACAS:
+    # Set customized properties.
+    analysis.historical_metadata = customized_data.get('historical_metadata')
+    analysis.channel = customized_data.get('channel')
+  elif client_id == CrashClient.CLUSTERFUZZ:  # pragma: no cover.
+    # TODO(katesonia): Set up clusterfuzz customized data.
+    pass
+
+  # Set analysis progress properties.
+  analysis.status = analysis_status.PENDING
+  analysis.requested_time = time_util.GetUTCNow()
+
+  analysis.put()
+
+
+def GetPublishResultFromAnalysis(analysis, crash_identifiers, client_id):
+  """Gets result to be published to client from datastore analysis."""
+  analysis_result = copy.deepcopy(analysis.result)
+
+  if (analysis.client_id == CrashClient.FRACAS or
+      analysis.client_id == CrashClient.CRACAS):
+    analysis_result['feedback_url'] = _FINDIT_FRACAS_FEEDBACK_URL_TEMPLATE % (
+        appengine_util.GetDefaultVersionHostname(), analysis.key.urlsafe())
+    if analysis_result['found']:
+      for cl in analysis_result['suspected_cls']:
+        cl['confidence'] = round(cl['confidence'], 2)
+        cl.pop('reason', None)
+  elif client_id == CrashClient.CLUSTERFUZZ:  # pragma: no cover.
+    # TODO(katesonia): Post process clusterfuzz analysis result if needed.
+    pass
+
+  return {
+      'crash_identifiers': crash_identifiers,
+      'client_id': analysis.client_id,
+      'result': analysis_result,
+  }
+
+
+def FindCulprit(analysis):
+  result = {'found': False}
+  tags = {'found_suspects': False,
+          'has_regression_range': False}
+
+  if (analysis.client_id == CrashClient.FRACAS or
+      analysis.client_id == CrashClient.CRACAS):
+    result, tags = findit_for_chromecrash.FindCulpritForChromeCrash(
+        analysis.signature, analysis.platform, analysis.stack_trace,
+        analysis.crashed_version, analysis.historical_metadata)
+  elif analysis.client_id == CrashClient.CLUSTERFUZZ:  # pragma: no cover.
+    # TODO(katesonia): Implement findit_for_clusterfuzz.
+    pass
+
+  return result, tags