runtime/dart/utils/handle_exception.cc

// Copyright 2018 The Fuchsia Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "handle_exception.h"

#include <string>

#include <fuchsia/crash/cpp/fidl.h>
#include <fuchsia/mem/cpp/fidl.h>
#include <lib/fsl/vmo/strings.h>
#include <lib/fxl/logging.h>
#include <sys/types.h>
#include <third_party/tonic/converter/dart_converter.h>
#include <zircon/errors.h>
#include <zircon/status.h>

namespace fuchsia {
namespace dart {

zx_status_t HandleIfException(component::StartupContext* context,
                              const std::string& component_url,
                              Dart_Handle result) {
  if (!Dart_IsError(result) || !Dart_ErrorHasException(result)) {
    return ZX_OK;
  }

  const std::string error =
      tonic::StdStringFromDart(Dart_ToString(Dart_ErrorGetException(result)));
  fuchsia::mem::Buffer stack_trace;
  if (!fsl::VmoFromString(tonic::StdStringFromDart(
                              Dart_ToString(Dart_ErrorGetStackTrace(result))),
                          &stack_trace)) {
    FXL_LOG(ERROR) << "failed to convert Dart stack trace to VMO";
    return ZX_ERR_INTERNAL;
  }

  fuchsia::crash::AnalyzerSyncPtr analyzer;
  context->ConnectToEnvironmentService(analyzer.NewRequest());
  FXL_DCHECK(analyzer);

  zx_status_t out_status;
  const zx_status_t status = analyzer->HandleManagedRuntimeException(
      fuchsia::crash::ManagedRuntimeLanguage::DART, component_url, error,
      std::move(stack_trace), &out_status);
  if (status != ZX_OK) {
    FXL_LOG(ERROR) << "failed to connect to crash analyzer: " << status << " ("
                   << zx_status_get_string(status) << ")";
    return ZX_ERR_INTERNAL;
  } else if (out_status != ZX_OK) {
    FXL_LOG(ERROR) << "failed to handle Dart exception: " << out_status << " ("
                   << zx_status_get_string(out_status) << ")";
    return ZX_ERR_INTERNAL;
  }
  return ZX_OK;
}

}  // namespace dart
}  // namespace fuchsia