зеркало из https://github.com/mozilla/gecko-dev.git
82 строки
2.5 KiB
C++
82 строки
2.5 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "nsImportModule.h"
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#include "mozilla/dom/ScriptSettings.h"
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#include "mozJSComponentLoader.h"
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#include "nsContentUtils.h"
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#include "nsExceptionHandler.h"
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#include "nsPrintfCString.h"
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#include "xpcpublic.h"
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#include "xpcprivate.h"
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#include "js/PropertyAndElement.h" // JS_GetProperty
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using mozilla::dom::AutoJSAPI;
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namespace mozilla {
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namespace loader {
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static void AnnotateCrashReportWithJSException(JSContext* aCx,
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const char* aURI) {
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JS::RootedValue exn(aCx);
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if (JS_GetPendingException(aCx, &exn)) {
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JS_ClearPendingException(aCx);
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JSAutoRealm ar(aCx, xpc::PrivilegedJunkScope());
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JS_WrapValue(aCx, &exn);
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nsAutoCString file;
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uint32_t line;
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uint32_t column;
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nsAutoString msg;
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nsContentUtils::ExtractErrorValues(aCx, exn, file, &line, &column, msg);
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nsPrintfCString errorString("Failed to load module \"%s\": %s:%u:%u: %s",
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aURI, file.get(), line, column,
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NS_ConvertUTF16toUTF8(msg).get());
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CrashReporter::AnnotateCrashReport(
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CrashReporter::Annotation::JSModuleLoadError, errorString);
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}
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}
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nsresult ImportModule(const char* aURI, const char* aExportName,
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const nsIID& aIID, void** aResult, bool aInfallible) {
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AutoJSAPI jsapi;
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MOZ_ALWAYS_TRUE(jsapi.Init(xpc::PrivilegedJunkScope()));
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JSContext* cx = jsapi.cx();
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JS::RootedObject global(cx);
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JS::RootedObject exports(cx);
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nsresult rv = mozJSComponentLoader::Get()->Import(
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cx, nsDependentCString(aURI), &global, &exports);
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if (NS_WARN_IF(NS_FAILED(rv))) {
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if (aInfallible) {
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AnnotateCrashReportWithJSException(cx, aURI);
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MOZ_CRASH_UNSAFE_PRINTF("Failed to load critical module \"%s\"", aURI);
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}
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return rv;
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}
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if (aExportName) {
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JS::RootedValue namedExport(cx);
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if (!JS_GetProperty(cx, exports, aExportName, &namedExport)) {
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return NS_ERROR_FAILURE;
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}
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if (!namedExport.isObject()) {
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return NS_ERROR_XPC_BAD_CONVERT_JS;
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}
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exports.set(&namedExport.toObject());
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}
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return nsXPConnect::XPConnect()->WrapJS(cx, exports, aIID, aResult);
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}
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} // namespace loader
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} // namespace mozilla
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