Add the ability to defer the initialization of the SyzyAsan crash reporter.

syzygy/agent/asan/runtime.cc

 // Copyright 2012 Google Inc. All Rights Reserved.
 //
 // 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,
@@ skipping 483 matching lines @@
   if (!SetUpMemoryNotifier())
     return false;
   if (!SetUpLogger())
     return false;
   if (!SetUpStackCache())
     return false;
   if (!SetUpHeapManager())
     return false;
   WindowsHeapAdapter::SetUp(heap_manager_.get());
 
-  // Determine the preferred crash reporter type, as specified in the
-  // environment. If this isn't present it defaults to
-  // kDefaultCrashReporterType, in which case experiments or command-line flags
-  // may specify the crash reporter to use.
-  CrashReporterType crash_reporter_type =
-      GetCrashReporterTypeFromEnvironment(logger());
-
   if (params_.feature_randomization) {
     AsanFeatureSet feature_set = GenerateRandomFeatureSet();
     PropagateFeatureSet(feature_set);
   }
 
   // Propagates the flags values to the different modules.
   PropagateParams();
 
-  // The name 'disable_breakpad_reporting' is legacy; this actually means to
-  // disable all external crash reporting integration.
-  if (!params_.disable_breakpad_reporting) {
-    // This will create the crash reporter with a preference for creating a
-    // reporter of the hinted type. If such a reporter isn't available, it will
-    // fall back to trying to create the most 'modern' reporter available.
-    crash_reporter_.reset(CreateCrashReporterWithTypeHint(
-        logger(), crash_reporter_type).release());
-  }
-
-  // Set up the appropriate error handler depending on whether or not
-  // we successfully initialized a crash reporter.
-  if (crash_reporter_.get() != nullptr) {
-    logger_->Write(base::StringPrintf(
-        "SyzyASAN: Using %s for error reporting.",
-        crash_reporter_->GetName()));
-    SetErrorCallBack(base::Bind(&CrashReporterErrorHandler));
-  } else {
-    logger_->Write("SyzyASAN: Using default error reporting handler.");
-    SetErrorCallBack(base::Bind(&DefaultErrorHandler));
-  }
+  InitializeCrashReporter();
 
   // Install the unhandled exception handler. This is only installed once
   // across all runtime instances in a process so we check that it hasn't
   // already been installed.
   // TODO(chrisha): Conditionally install this based on the crash reporter in
   // use. Eventually, Crashpad will provide us a callback instead of having us
   // register the handler ourselves.
   if (!uef_installed_) {
     uef_installed_ = true;
     previous_uef_ = ::SetUnhandledExceptionFilter(&UnhandledExceptionFilter);
@@ skipping 670 matching lines @@
 AsanFeatureSet AsanRuntime::GetEnabledFeatureSet() {
   AsanFeatureSet enabled_features = static_cast<AsanFeatureSet>(0U);
   if (heap_manager_->enable_page_protections_)
     enabled_features |= ASAN_FEATURE_ENABLE_PAGE_PROTECTIONS;
   if (params_.enable_large_block_heap)
     enabled_features |= ASAN_FEATURE_ENABLE_LARGE_BLOCK_HEAP;
 
   return enabled_features;
 }
 
+void AsanRuntime::InitializeCrashReporter() {
+  if (crash_reporter_.get() != nullptr) {
+    logger_->Write(base::StringPrintf(
+        "SyzyASAN: Reinitializing crash reporter.",
+        crash_reporter_->GetName()));
+  }
+
+  // Determine the preferred crash reporter type, as specified in the
+  // environment. If this isn't present it defaults to
+  // kDefaultCrashReporterType, in which case experiments or command-line flags
+  // may specify the crash reporter to use.
+  CrashReporterType crash_reporter_type =
+      GetCrashReporterTypeFromEnvironment(logger());
+
+  // The name 'disable_breakpad_reporting' is legacy; this actually means to
+  // disable all external crash reporting integration.
+  if (!params_.disable_breakpad_reporting) {
+    // This will create the crash reporter with a preference for creating a
+    // reporter of the hinted type. If such a reporter isn't available, it will
+    // fall back to trying to create the most 'modern' reporter available.
+    crash_reporter_.reset(CreateCrashReporterWithTypeHint(
+        logger(), crash_reporter_type).release());
+  }
+
+  // Set up the appropriate error handler depending on whether or not
+  // we successfully initialized a crash reporter.
+  if (crash_reporter_.get() != nullptr) {
+    logger_->Write(base::StringPrintf(
+        "SyzyASAN: Using %s for error reporting.",
+        crash_reporter_->GetName()));
+    SetErrorCallBack(base::Bind(&CrashReporterErrorHandler));
+  } else {
+    logger_->Write("SyzyASAN: Using default error reporting handler.");
+    SetErrorCallBack(base::Bind(&DefaultErrorHandler));
+  }
+}
+
 }  // namespace asan
 }  // namespace agent