1429 lines
45 KiB
C++
1429 lines
45 KiB
C++
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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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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 "mozilla/Attributes.h"
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#include <cstdarg>
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#include "mozilla/Logging.h"
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#ifdef ANDROID
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#include <android/log.h>
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#endif
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#ifdef XP_WIN
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#include <windows.h>
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#endif
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#include "jsapi.h"
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#include "nsCOMPtr.h"
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#include "nsAutoPtr.h"
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#include "nsIComponentManager.h"
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#include "mozilla/Module.h"
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#include "nsIFile.h"
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#include "mozJSComponentLoader.h"
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#include "mozJSLoaderUtils.h"
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#include "nsIXPConnect.h"
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#include "nsIObserverService.h"
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#include "nsIScriptSecurityManager.h"
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#include "nsIFileURL.h"
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#include "nsIJARURI.h"
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#include "nsNetUtil.h"
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#include "jsprf.h"
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#include "nsJSPrincipals.h"
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#include "nsJSUtils.h"
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#include "xpcprivate.h"
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#include "xpcpublic.h"
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#include "nsContentUtils.h"
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#include "nsXULAppAPI.h"
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#include "WrapperFactory.h"
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#include "mozilla/AddonPathService.h"
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#include "mozilla/scache/StartupCache.h"
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#include "mozilla/scache/StartupCacheUtils.h"
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#include "mozilla/MacroForEach.h"
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#include "mozilla/Preferences.h"
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#include "mozilla/dom/ScriptSettings.h"
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#include "mozilla/UniquePtrExtensions.h"
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#include "mozilla/Unused.h"
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using namespace mozilla;
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using namespace mozilla::scache;
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using namespace xpc;
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using namespace JS;
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// This JSClass exists to trick silly code that expects toString()ing the
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// global in a component scope to return something with "BackstagePass" in it
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// to continue working.
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static const JSClass kFakeBackstagePassJSClass = { "FakeBackstagePass" };
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static const char kXPConnectServiceContractID[] = "@mozilla.org/js/xpc/XPConnect;1";
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static const char kObserverServiceContractID[] = "@mozilla.org/observer-service;1";
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static const char kJSCachePrefix[] = "jsloader";
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#define HAVE_PR_MEMMAP
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/**
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* Buffer sizes for serialization and deserialization of scripts.
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* FIXME: bug #411579 (tune this macro!) Last updated: Jan 2008
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*/
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#define XPC_SERIALIZATION_BUFFER_SIZE (64 * 1024)
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#define XPC_DESERIALIZATION_BUFFER_SIZE (12 * 8192)
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// MOZ_LOG=JSComponentLoader:5
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static LazyLogModule gJSCLLog("JSComponentLoader");
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#define LOG(args) MOZ_LOG(gJSCLLog, mozilla::LogLevel::Debug, args)
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// Components.utils.import error messages
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#define ERROR_SCOPE_OBJ "%s - Second argument must be an object."
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#define ERROR_NOT_PRESENT "%s - EXPORTED_SYMBOLS is not present."
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#define ERROR_NOT_AN_ARRAY "%s - EXPORTED_SYMBOLS is not an array."
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#define ERROR_GETTING_ARRAY_LENGTH "%s - Error getting array length of EXPORTED_SYMBOLS."
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#define ERROR_ARRAY_ELEMENT "%s - EXPORTED_SYMBOLS[%d] is not a string."
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#define ERROR_GETTING_SYMBOL "%s - Could not get symbol '%s'."
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#define ERROR_SETTING_SYMBOL "%s - Could not set symbol '%s' on target object."
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static bool
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Dump(JSContext* cx, unsigned argc, Value* vp)
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{
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CallArgs args = CallArgsFromVp(argc, vp);
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if (args.length() == 0)
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return true;
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RootedString str(cx, JS::ToString(cx, args[0]));
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if (!str)
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return false;
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JSAutoByteString utf8str;
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if (!utf8str.encodeUtf8(cx, str))
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return false;
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#ifdef ANDROID
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__android_log_print(ANDROID_LOG_INFO, "Gecko", "%s", utf8str.ptr());
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#endif
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#ifdef XP_WIN
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if (IsDebuggerPresent()) {
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nsAutoJSString wstr;
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if (!wstr.init(cx, str))
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return false;
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OutputDebugStringW(wstr.get());
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}
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#endif
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fputs(utf8str.ptr(), stdout);
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fflush(stdout);
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return true;
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}
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static bool
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Debug(JSContext* cx, unsigned argc, Value* vp)
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{
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#ifdef DEBUG
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return Dump(cx, argc, vp);
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#else
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return true;
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#endif
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}
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static const JSFunctionSpec gGlobalFun[] = {
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JS_FS("dump", Dump, 1,0),
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JS_FS("debug", Debug, 1,0),
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JS_FS("atob", Atob, 1,0),
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JS_FS("btoa", Btoa, 1,0),
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JS_FS_END
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};
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class MOZ_STACK_CLASS JSCLContextHelper
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{
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public:
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explicit JSCLContextHelper(JSContext* aCx);
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~JSCLContextHelper();
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void reportErrorAfterPop(char* buf);
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private:
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JSContext* mContext;
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char* mBuf;
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// prevent copying and assignment
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JSCLContextHelper(const JSCLContextHelper&) = delete;
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const JSCLContextHelper& operator=(const JSCLContextHelper&) = delete;
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};
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static nsresult
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MOZ_FORMAT_PRINTF(2, 3)
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ReportOnCallerUTF8(JSContext* callerContext,
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const char* format, ...) {
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if (!callerContext) {
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return NS_ERROR_FAILURE;
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}
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va_list ap;
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va_start(ap, format);
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char* buf = JS_vsmprintf(format, ap);
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if (!buf) {
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va_end(ap);
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return NS_ERROR_OUT_OF_MEMORY;
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}
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JS_ReportErrorUTF8(callerContext, "%s", buf);
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JS_smprintf_free(buf);
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va_end(ap);
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return NS_OK;
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}
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static nsresult
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MOZ_FORMAT_PRINTF(2, 3)
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ReportOnCallerUTF8(JSCLContextHelper& helper,
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const char* format, ...)
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{
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va_list ap;
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va_start(ap, format);
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char* buf = JS_vsmprintf(format, ap);
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if (!buf) {
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va_end(ap);
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return NS_ERROR_OUT_OF_MEMORY;
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}
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helper.reportErrorAfterPop(buf);
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va_end(ap);
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return NS_OK;
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}
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mozJSComponentLoader::mozJSComponentLoader()
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: mModules(16),
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mImports(16),
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mInProgressImports(16),
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mInitialized(false),
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mReuseLoaderGlobal(false)
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{
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MOZ_ASSERT(!sSelf, "mozJSComponentLoader should be a singleton");
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sSelf = this;
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}
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#define ENSURE_DEP(name) { nsresult rv = Ensure##name(); NS_ENSURE_SUCCESS(rv, rv); }
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#define ENSURE_DEPS(...) MOZ_FOR_EACH(ENSURE_DEP, (), (__VA_ARGS__));
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#define BEGIN_ENSURE(self, ...) { \
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if (m##self) \
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return NS_OK; \
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ENSURE_DEPS(__VA_ARGS__); \
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}
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class MOZ_STACK_CLASS ComponentLoaderInfo {
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public:
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explicit ComponentLoaderInfo(const nsACString& aLocation) : mLocation(aLocation) {}
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nsIIOService* IOService() { MOZ_ASSERT(mIOService); return mIOService; }
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nsresult EnsureIOService() {
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if (mIOService)
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return NS_OK;
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nsresult rv;
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mIOService = do_GetIOService(&rv);
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return rv;
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}
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nsIURI* URI() { MOZ_ASSERT(mURI); return mURI; }
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nsresult EnsureURI() {
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BEGIN_ENSURE(URI, IOService);
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return mIOService->NewURI(mLocation, nullptr, nullptr, getter_AddRefs(mURI));
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}
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nsIChannel* ScriptChannel() { MOZ_ASSERT(mScriptChannel); return mScriptChannel; }
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nsresult EnsureScriptChannel() {
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BEGIN_ENSURE(ScriptChannel, IOService, URI);
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return NS_NewChannel(getter_AddRefs(mScriptChannel),
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mURI,
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nsContentUtils::GetSystemPrincipal(),
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nsILoadInfo::SEC_ALLOW_CROSS_ORIGIN_DATA_IS_NULL,
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nsIContentPolicy::TYPE_SCRIPT,
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nullptr, // aLoadGroup
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nullptr, // aCallbacks
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nsIRequest::LOAD_NORMAL,
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mIOService);
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}
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nsIURI* ResolvedURI() { MOZ_ASSERT(mResolvedURI); return mResolvedURI; }
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nsresult EnsureResolvedURI() {
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BEGIN_ENSURE(ResolvedURI, ScriptChannel);
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return mScriptChannel->GetURI(getter_AddRefs(mResolvedURI));
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}
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nsAutoCString& Key() { return *mKey; }
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nsresult EnsureKey() {
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ENSURE_DEPS(ResolvedURI);
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mKey.emplace();
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return mResolvedURI->GetSpec(*mKey);
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}
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MOZ_MUST_USE nsresult GetLocation(nsCString& aLocation) {
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nsresult rv = EnsureURI();
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NS_ENSURE_SUCCESS(rv, rv);
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return mURI->GetSpec(aLocation);
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}
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private:
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const nsACString& mLocation;
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nsCOMPtr<nsIIOService> mIOService;
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nsCOMPtr<nsIURI> mURI;
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nsCOMPtr<nsIChannel> mScriptChannel;
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nsCOMPtr<nsIURI> mResolvedURI;
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Maybe<nsAutoCString> mKey; // This is safe because we're MOZ_STACK_CLASS
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};
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#undef BEGIN_ENSURE
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#undef ENSURE_DEPS
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#undef ENSURE_DEP
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mozJSComponentLoader::~mozJSComponentLoader()
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{
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if (mInitialized) {
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NS_ERROR("'xpcom-shutdown-loaders' was not fired before cleaning up mozJSComponentLoader");
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UnloadModules();
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}
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sSelf = nullptr;
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}
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mozJSComponentLoader*
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mozJSComponentLoader::sSelf;
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NS_IMPL_ISUPPORTS(mozJSComponentLoader,
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mozilla::ModuleLoader,
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xpcIJSModuleLoader,
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nsIObserver)
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nsresult
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mozJSComponentLoader::ReallyInit()
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{
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nsresult rv;
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mReuseLoaderGlobal = Preferences::GetBool("jsloader.reuseGlobal");
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nsCOMPtr<nsIScriptSecurityManager> secman =
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do_GetService(NS_SCRIPTSECURITYMANAGER_CONTRACTID);
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if (!secman)
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return NS_ERROR_FAILURE;
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rv = secman->GetSystemPrincipal(getter_AddRefs(mSystemPrincipal));
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if (NS_FAILED(rv) || !mSystemPrincipal)
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return NS_ERROR_FAILURE;
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nsCOMPtr<nsIObserverService> obsSvc =
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do_GetService(kObserverServiceContractID, &rv);
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NS_ENSURE_SUCCESS(rv, rv);
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rv = obsSvc->AddObserver(this, "xpcom-shutdown-loaders", false);
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NS_ENSURE_SUCCESS(rv, rv);
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mInitialized = true;
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return NS_OK;
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}
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// For terrible compatibility reasons, we need to consider both the global
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// lexical environment and the global of modules when searching for exported
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// symbols.
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static JSObject*
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ResolveModuleObjectProperty(JSContext* aCx, HandleObject aModObj, const char* name)
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{
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if (JS_HasExtensibleLexicalEnvironment(aModObj)) {
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RootedObject lexical(aCx, JS_ExtensibleLexicalEnvironment(aModObj));
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bool found;
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if (!JS_HasOwnProperty(aCx, lexical, name, &found)) {
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return nullptr;
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}
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if (found) {
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return lexical;
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}
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}
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return aModObj;
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}
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const mozilla::Module*
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mozJSComponentLoader::LoadModule(FileLocation& aFile)
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{
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if (!NS_IsMainThread()) {
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MOZ_ASSERT(false, "Don't use JS components off the main thread");
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return nullptr;
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}
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nsCOMPtr<nsIFile> file = aFile.GetBaseFile();
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nsCString spec;
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aFile.GetURIString(spec);
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ComponentLoaderInfo info(spec);
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nsresult rv = info.EnsureURI();
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NS_ENSURE_SUCCESS(rv, nullptr);
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if (!mInitialized) {
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rv = ReallyInit();
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if (NS_FAILED(rv))
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return nullptr;
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}
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ModuleEntry* mod;
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if (mModules.Get(spec, &mod))
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return mod;
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dom::AutoJSAPI jsapi;
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jsapi.Init();
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JSContext* cx = jsapi.cx();
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nsAutoPtr<ModuleEntry> entry(new ModuleEntry(RootingContext::get(cx)));
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RootedValue dummy(cx);
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rv = ObjectForLocation(info, file, &entry->obj, &entry->thisObjectKey,
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&entry->location, false, &dummy);
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if (NS_FAILED(rv)) {
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return nullptr;
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}
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nsCOMPtr<nsIXPConnect> xpc = do_GetService(kXPConnectServiceContractID,
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&rv);
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if (NS_FAILED(rv))
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return nullptr;
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nsCOMPtr<nsIComponentManager> cm;
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rv = NS_GetComponentManager(getter_AddRefs(cm));
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if (NS_FAILED(rv))
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return nullptr;
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JSAutoCompartment ac(cx, entry->obj);
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RootedObject entryObj(cx, entry->obj);
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RootedObject NSGetFactoryHolder(cx, ResolveModuleObjectProperty(cx, entryObj, "NSGetFactory"));
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RootedValue NSGetFactory_val(cx);
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if (!NSGetFactoryHolder ||
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!JS_GetProperty(cx, NSGetFactoryHolder, "NSGetFactory", &NSGetFactory_val) ||
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NSGetFactory_val.isUndefined())
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{
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return nullptr;
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}
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if (JS_TypeOfValue(cx, NSGetFactory_val) != JSTYPE_FUNCTION) {
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/*
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* spec's encoding is ASCII unless it's zip file, otherwise it's
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* random encoding. Latin1 variant is safe for random encoding.
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*/
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JS_ReportErrorLatin1(cx, "%s has NSGetFactory property that is not a function",
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spec.get());
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return nullptr;
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}
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RootedObject jsGetFactoryObj(cx);
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if (!JS_ValueToObject(cx, NSGetFactory_val, &jsGetFactoryObj) ||
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!jsGetFactoryObj) {
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/* XXX report error properly */
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return nullptr;
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}
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rv = xpc->WrapJS(cx, jsGetFactoryObj,
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NS_GET_IID(xpcIJSGetFactory), getter_AddRefs(entry->getfactoryobj));
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if (NS_FAILED(rv)) {
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/* XXX report error properly */
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#ifdef DEBUG
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fprintf(stderr, "mJCL: couldn't get nsIModule from jsval\n");
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#endif
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return nullptr;
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}
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// Cache this module for later
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mModules.Put(spec, entry);
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// Set the location information for the new global, so that tools like
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// about:memory may use that information
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if (!mReuseLoaderGlobal) {
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xpc::SetLocationForGlobal(entryObj, spec);
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}
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// The hash owns the ModuleEntry now, forget about it
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return entry.forget();
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}
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nsresult
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mozJSComponentLoader::FindTargetObject(JSContext* aCx,
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MutableHandleObject aTargetObject)
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{
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aTargetObject.set(nullptr);
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RootedObject targetObject(aCx);
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if (mReuseLoaderGlobal) {
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JSFunction* fun = js::GetOutermostEnclosingFunctionOfScriptedCaller(aCx);
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if (fun) {
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JSObject* funParent = js::GetNearestEnclosingWithEnvironmentObjectForFunction(fun);
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if (JS_GetClass(funParent) == &kFakeBackstagePassJSClass)
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targetObject = funParent;
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}
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}
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// The above could fail, even if mReuseLoaderGlobal, if the scripted
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// caller is not a component/JSM (it could be a DOM scope, for
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// instance).
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if (!targetObject) {
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// Our targetObject is the caller's global object. Let's get it.
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targetObject = CurrentGlobalOrNull(aCx);
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}
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aTargetObject.set(targetObject);
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return NS_OK;
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}
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// This requires that the keys be strings and the values be pointers.
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template <class Key, class Data, class UserData>
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static size_t
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SizeOfTableExcludingThis(const nsBaseHashtable<Key, Data, UserData>& aTable,
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MallocSizeOf aMallocSizeOf)
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|
{
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|
size_t n = aTable.ShallowSizeOfExcludingThis(aMallocSizeOf);
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for (auto iter = aTable.ConstIter(); !iter.Done(); iter.Next()) {
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n += iter.Key().SizeOfExcludingThisIfUnshared(aMallocSizeOf);
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n += iter.Data()->SizeOfIncludingThis(aMallocSizeOf);
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}
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return n;
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}
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size_t
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mozJSComponentLoader::SizeOfIncludingThis(MallocSizeOf aMallocSizeOf)
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{
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size_t n = aMallocSizeOf(this);
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n += SizeOfTableExcludingThis(mModules, aMallocSizeOf);
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n += SizeOfTableExcludingThis(mImports, aMallocSizeOf);
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n += SizeOfTableExcludingThis(mInProgressImports, aMallocSizeOf);
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return n;
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}
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|
// Some stack based classes for cleaning up on early return
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|
#ifdef HAVE_PR_MEMMAP
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|
class FileAutoCloser
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{
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|
public:
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|
explicit FileAutoCloser(PRFileDesc* file) : mFile(file) {}
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|
~FileAutoCloser() { PR_Close(mFile); }
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|
private:
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|
PRFileDesc* mFile;
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};
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class FileMapAutoCloser
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|
{
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public:
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explicit FileMapAutoCloser(PRFileMap* map) : mMap(map) {}
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|
~FileMapAutoCloser() { PR_CloseFileMap(mMap); }
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private:
|
|
PRFileMap* mMap;
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};
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|
#else
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|
class ANSIFileAutoCloser
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|
{
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|
public:
|
|
explicit ANSIFileAutoCloser(FILE* file) : mFile(file) {}
|
|
~ANSIFileAutoCloser() { fclose(mFile); }
|
|
private:
|
|
FILE* mFile;
|
|
};
|
|
#endif
|
|
|
|
JSObject*
|
|
mozJSComponentLoader::PrepareObjectForLocation(JSContext* aCx,
|
|
nsIFile* aComponentFile,
|
|
nsIURI* aURI,
|
|
bool aReuseLoaderGlobal,
|
|
bool* aRealFile)
|
|
{
|
|
nsCOMPtr<nsIXPConnectJSObjectHolder> holder;
|
|
if (aReuseLoaderGlobal) {
|
|
holder = mLoaderGlobal;
|
|
}
|
|
|
|
nsresult rv = NS_OK;
|
|
nsCOMPtr<nsIXPConnect> xpc =
|
|
do_GetService(kXPConnectServiceContractID, &rv);
|
|
NS_ENSURE_SUCCESS(rv, nullptr);
|
|
bool createdNewGlobal = false;
|
|
|
|
if (!mLoaderGlobal) {
|
|
RefPtr<BackstagePass> backstagePass;
|
|
rv = NS_NewBackstagePass(getter_AddRefs(backstagePass));
|
|
NS_ENSURE_SUCCESS(rv, nullptr);
|
|
|
|
CompartmentOptions options;
|
|
|
|
options.creationOptions()
|
|
.setZone(SystemZone)
|
|
.setAddonId(aReuseLoaderGlobal ? nullptr : MapURIToAddonID(aURI));
|
|
|
|
options.behaviors().setVersion(JSVERSION_LATEST);
|
|
|
|
if (xpc::SharedMemoryEnabled())
|
|
options.creationOptions().setSharedMemoryAndAtomicsEnabled(true);
|
|
|
|
// Defer firing OnNewGlobalObject until after the __URI__ property has
|
|
// been defined so the JS debugger can tell what module the global is
|
|
// for
|
|
rv = xpc->InitClassesWithNewWrappedGlobal(aCx,
|
|
static_cast<nsIGlobalObject*>(backstagePass),
|
|
mSystemPrincipal,
|
|
nsIXPConnect::DONT_FIRE_ONNEWGLOBALHOOK,
|
|
options,
|
|
getter_AddRefs(holder));
|
|
NS_ENSURE_SUCCESS(rv, nullptr);
|
|
createdNewGlobal = true;
|
|
|
|
RootedObject global(aCx, holder->GetJSObject());
|
|
NS_ENSURE_TRUE(global, nullptr);
|
|
|
|
backstagePass->SetGlobalObject(global);
|
|
|
|
JSAutoCompartment ac(aCx, global);
|
|
if (!JS_DefineFunctions(aCx, global, gGlobalFun) ||
|
|
!JS_DefineProfilingFunctions(aCx, global)) {
|
|
return nullptr;
|
|
}
|
|
|
|
if (aReuseLoaderGlobal) {
|
|
mLoaderGlobal = holder;
|
|
}
|
|
}
|
|
|
|
RootedObject obj(aCx, holder->GetJSObject());
|
|
NS_ENSURE_TRUE(obj, nullptr);
|
|
|
|
JSAutoCompartment ac(aCx, obj);
|
|
|
|
if (aReuseLoaderGlobal) {
|
|
// If we're reusing the loader global, we don't actually use the
|
|
// global, but rather we use a different object as the 'this' object.
|
|
obj = JS_NewObject(aCx, &kFakeBackstagePassJSClass);
|
|
NS_ENSURE_TRUE(obj, nullptr);
|
|
}
|
|
|
|
*aRealFile = false;
|
|
|
|
// need to be extra careful checking for URIs pointing to files
|
|
// EnsureFile may not always get called, especially on resource URIs
|
|
// so we need to call GetFile to make sure this is a valid file
|
|
nsCOMPtr<nsIFileURL> fileURL = do_QueryInterface(aURI, &rv);
|
|
nsCOMPtr<nsIFile> testFile;
|
|
if (NS_SUCCEEDED(rv)) {
|
|
fileURL->GetFile(getter_AddRefs(testFile));
|
|
}
|
|
|
|
if (testFile) {
|
|
*aRealFile = true;
|
|
|
|
if (XRE_IsParentProcess()) {
|
|
RootedObject locationObj(aCx);
|
|
|
|
rv = xpc->WrapNative(aCx, obj, aComponentFile,
|
|
NS_GET_IID(nsIFile),
|
|
locationObj.address());
|
|
NS_ENSURE_SUCCESS(rv, nullptr);
|
|
NS_ENSURE_TRUE(locationObj, nullptr);
|
|
|
|
if (!JS_DefineProperty(aCx, obj, "__LOCATION__", locationObj, 0))
|
|
return nullptr;
|
|
}
|
|
}
|
|
|
|
nsAutoCString nativePath;
|
|
rv = aURI->GetSpec(nativePath);
|
|
NS_ENSURE_SUCCESS(rv, nullptr);
|
|
|
|
// Expose the URI from which the script was imported through a special
|
|
// variable that we insert into the JSM.
|
|
RootedString exposedUri(aCx, JS_NewStringCopyN(aCx, nativePath.get(), nativePath.Length()));
|
|
NS_ENSURE_TRUE(exposedUri, nullptr);
|
|
|
|
if (!JS_DefineProperty(aCx, obj, "__URI__", exposedUri, 0))
|
|
return nullptr;
|
|
|
|
if (createdNewGlobal) {
|
|
// AutoEntryScript required to invoke debugger hook, which is a
|
|
// Gecko-specific concept at present.
|
|
dom::AutoEntryScript aes(holder->GetJSObject(),
|
|
"component loader report global");
|
|
RootedObject global(aes.cx(), holder->GetJSObject());
|
|
JS_FireOnNewGlobalObject(aes.cx(), global);
|
|
}
|
|
|
|
return obj;
|
|
}
|
|
|
|
nsresult
|
|
mozJSComponentLoader::ObjectForLocation(ComponentLoaderInfo& aInfo,
|
|
nsIFile* aComponentFile,
|
|
MutableHandleObject aObject,
|
|
MutableHandleScript aTableScript,
|
|
char** aLocation,
|
|
bool aPropagateExceptions,
|
|
MutableHandleValue aException)
|
|
{
|
|
MOZ_ASSERT(NS_IsMainThread(), "Must be on main thread.");
|
|
|
|
dom::AutoJSAPI jsapi;
|
|
jsapi.Init();
|
|
JSContext* cx = jsapi.cx();
|
|
|
|
bool realFile = false;
|
|
nsresult rv = aInfo.EnsureURI();
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
RootedObject obj(cx, PrepareObjectForLocation(cx, aComponentFile, aInfo.URI(),
|
|
mReuseLoaderGlobal, &realFile));
|
|
NS_ENSURE_TRUE(obj, NS_ERROR_FAILURE);
|
|
MOZ_ASSERT(JS_IsGlobalObject(obj) == !mReuseLoaderGlobal);
|
|
|
|
JSAutoCompartment ac(cx, obj);
|
|
|
|
RootedScript script(cx);
|
|
RootedFunction function(cx);
|
|
|
|
nsAutoCString nativePath;
|
|
rv = aInfo.URI()->GetSpec(nativePath);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
// Before compiling the script, first check to see if we have it in
|
|
// the startupcache. Note: as a rule, startupcache errors are not fatal
|
|
// to loading the script, since we can always slow-load.
|
|
|
|
bool writeToCache = false;
|
|
StartupCache* cache = StartupCache::GetSingleton();
|
|
|
|
nsAutoCString cachePath(kJSCachePrefix);
|
|
rv = PathifyURI(aInfo.URI(), cachePath);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
if (cache) {
|
|
if (!mReuseLoaderGlobal) {
|
|
rv = ReadCachedScript(cache, cachePath, cx, mSystemPrincipal, &script);
|
|
} else {
|
|
rv = ReadCachedFunction(cache, cachePath, cx, mSystemPrincipal,
|
|
function.address());
|
|
}
|
|
|
|
if (NS_SUCCEEDED(rv)) {
|
|
LOG(("Successfully loaded %s from startupcache\n", nativePath.get()));
|
|
} else {
|
|
// This is ok, it just means the script is not yet in the
|
|
// cache. Could mean that the cache was corrupted and got removed,
|
|
// but either way we're going to write this out.
|
|
writeToCache = true;
|
|
// ReadCachedScript and ReadCachedFunction may have set a pending
|
|
// exception.
|
|
JS_ClearPendingException(cx);
|
|
}
|
|
}
|
|
|
|
if (!script && !function) {
|
|
// The script wasn't in the cache , so compile it now.
|
|
LOG(("Slow loading %s\n", nativePath.get()));
|
|
|
|
// Use lazy source if both of these conditions hold:
|
|
//
|
|
// (1) mReuseLoaderGlobal is false. If mReuseLoaderGlobal is true, we
|
|
// can't do lazy source because we compile things as functions
|
|
// (rather than script), and lazy source isn't supported in that
|
|
// configuration. That's ok though, because we only do
|
|
// mReuseLoaderGlobal on b2g, where we invoke setDiscardSource(true)
|
|
// on the entire global.
|
|
//
|
|
// (2) We're using the startup cache. Non-lazy source + startup cache
|
|
// regresses installer size (due to source code stored in XDR
|
|
// encoded modules in omni.ja). Also, XDR decoding is relatively
|
|
// fast. Content processes don't use the startup cache, so we want
|
|
// them to use non-lazy source code to enable lazy parsing.
|
|
// See bug 1303754.
|
|
CompileOptions options(cx);
|
|
options.setNoScriptRval(mReuseLoaderGlobal ? false : true)
|
|
.setVersion(JSVERSION_LATEST)
|
|
.setFileAndLine(nativePath.get(), 1)
|
|
.setSourceIsLazy(!mReuseLoaderGlobal && !!cache);
|
|
|
|
if (realFile) {
|
|
#ifdef HAVE_PR_MEMMAP
|
|
int64_t fileSize;
|
|
rv = aComponentFile->GetFileSize(&fileSize);
|
|
if (NS_FAILED(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
int64_t maxSize = UINT32_MAX;
|
|
if (fileSize > maxSize) {
|
|
NS_ERROR("file too large");
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
PRFileDesc* fileHandle;
|
|
rv = aComponentFile->OpenNSPRFileDesc(PR_RDONLY, 0, &fileHandle);
|
|
if (NS_FAILED(rv)) {
|
|
return NS_ERROR_FILE_NOT_FOUND;
|
|
}
|
|
|
|
// Make sure the file is closed, no matter how we return.
|
|
FileAutoCloser fileCloser(fileHandle);
|
|
|
|
// We don't provide the file size here. If we did, PR_CreateFileMap
|
|
// would simply stat() the file to verify that the size we provided
|
|
// didn't require extending the file. We know that the file doesn't
|
|
// need to be extended, so skip the extra work by not providing the
|
|
// size.
|
|
PRFileMap* map = PR_CreateFileMap(fileHandle, 0, PR_PROT_READONLY);
|
|
if (!map) {
|
|
NS_ERROR("Failed to create file map");
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
// Make sure the file map is closed, no matter how we return.
|
|
FileMapAutoCloser mapCloser(map);
|
|
|
|
uint32_t fileSize32 = fileSize;
|
|
|
|
char* buf = static_cast<char*>(PR_MemMap(map, 0, fileSize32));
|
|
if (!buf) {
|
|
NS_WARNING("Failed to map file");
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
if (!mReuseLoaderGlobal) {
|
|
Compile(cx, options, buf, fileSize32, &script);
|
|
} else {
|
|
// Note: exceptions will get handled further down;
|
|
// don't early return for them here.
|
|
AutoObjectVector envChain(cx);
|
|
if (envChain.append(obj)) {
|
|
CompileFunction(cx, envChain,
|
|
options, nullptr, 0, nullptr,
|
|
buf, fileSize32, &function);
|
|
}
|
|
}
|
|
|
|
PR_MemUnmap(buf, fileSize32);
|
|
|
|
#else /* HAVE_PR_MEMMAP */
|
|
|
|
/**
|
|
* No memmap implementation, so fall back to
|
|
* reading in the file
|
|
*/
|
|
|
|
FILE* fileHandle;
|
|
rv = aComponentFile->OpenANSIFileDesc("r", &fileHandle);
|
|
if (NS_FAILED(rv)) {
|
|
return NS_ERROR_FILE_NOT_FOUND;
|
|
}
|
|
|
|
// Ensure file fclose
|
|
ANSIFileAutoCloser fileCloser(fileHandle);
|
|
|
|
int64_t len;
|
|
rv = aComponentFile->GetFileSize(&len);
|
|
if (NS_FAILED(rv) || len < 0) {
|
|
NS_WARNING("Failed to get file size");
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
char* buf = (char*) malloc(len * sizeof(char));
|
|
if (!buf) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
size_t rlen = fread(buf, 1, len, fileHandle);
|
|
if (rlen != (uint64_t)len) {
|
|
free(buf);
|
|
NS_WARNING("Failed to read file");
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
if (!mReuseLoaderGlobal) {
|
|
script = Compile(cx, options, buf, fileSize32);
|
|
} else {
|
|
// Note: exceptions will get handled further down;
|
|
// don't early return for them here.
|
|
AutoObjectVector envChain(cx);
|
|
if (envChain.append(obj)) {
|
|
CompileFunction(cx, envChain,
|
|
options, nullptr, 0, nullptr,
|
|
buf, fileSize32, &function);
|
|
}
|
|
}
|
|
|
|
free(buf);
|
|
|
|
#endif /* HAVE_PR_MEMMAP */
|
|
} else {
|
|
rv = aInfo.EnsureScriptChannel();
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
nsCOMPtr<nsIInputStream> scriptStream;
|
|
rv = NS_MaybeOpenChannelUsingOpen2(aInfo.ScriptChannel(),
|
|
getter_AddRefs(scriptStream));
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
uint64_t len64;
|
|
uint32_t bytesRead;
|
|
|
|
rv = scriptStream->Available(&len64);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
NS_ENSURE_TRUE(len64 < UINT32_MAX, NS_ERROR_FILE_TOO_BIG);
|
|
if (!len64)
|
|
return NS_ERROR_FAILURE;
|
|
uint32_t len = (uint32_t)len64;
|
|
|
|
/* malloc an internal buf the size of the file */
|
|
auto buf = MakeUniqueFallible<char[]>(len + 1);
|
|
if (!buf)
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
|
|
/* read the file in one swoop */
|
|
rv = scriptStream->Read(buf.get(), len, &bytesRead);
|
|
if (bytesRead != len)
|
|
return NS_BASE_STREAM_OSERROR;
|
|
|
|
buf[len] = '\0';
|
|
|
|
if (!mReuseLoaderGlobal) {
|
|
Compile(cx, options, buf.get(), bytesRead, &script);
|
|
} else {
|
|
// Note: exceptions will get handled further down;
|
|
// don't early return for them here.
|
|
AutoObjectVector envChain(cx);
|
|
if (envChain.append(obj)) {
|
|
CompileFunction(cx, envChain,
|
|
options, nullptr, 0, nullptr,
|
|
buf.get(), bytesRead, &function);
|
|
}
|
|
}
|
|
}
|
|
// Propagate the exception, if one exists. Also, don't leave the stale
|
|
// exception on this context.
|
|
if (!script && !function && aPropagateExceptions &&
|
|
jsapi.HasException()) {
|
|
if (!jsapi.StealException(aException))
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
}
|
|
}
|
|
|
|
if (!script && !function) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
// We must have a script or a function (but not both!) here. We have a
|
|
// script when we're not reusing the loader global, and a function
|
|
// otherwise.
|
|
MOZ_ASSERT(!!script != !!function);
|
|
MOZ_ASSERT(!!script == JS_IsGlobalObject(obj));
|
|
|
|
if (writeToCache) {
|
|
// We successfully compiled the script, so cache it.
|
|
if (script) {
|
|
rv = WriteCachedScript(cache, cachePath, cx, mSystemPrincipal,
|
|
script);
|
|
} else {
|
|
rv = WriteCachedFunction(cache, cachePath, cx, mSystemPrincipal,
|
|
function);
|
|
}
|
|
|
|
// Don't treat failure to write as fatal, since we might be working
|
|
// with a read-only cache.
|
|
if (NS_SUCCEEDED(rv)) {
|
|
LOG(("Successfully wrote to cache\n"));
|
|
} else {
|
|
LOG(("Failed to write to cache\n"));
|
|
}
|
|
}
|
|
|
|
// Assign aObject here so that it's available to recursive imports.
|
|
// See bug 384168.
|
|
aObject.set(obj);
|
|
|
|
RootedScript tableScript(cx, script);
|
|
if (!tableScript) {
|
|
tableScript = JS_GetFunctionScript(cx, function);
|
|
MOZ_ASSERT(tableScript);
|
|
}
|
|
|
|
aTableScript.set(tableScript);
|
|
|
|
|
|
{ // Scope for AutoEntryScript
|
|
|
|
// We're going to run script via JS_ExecuteScript or
|
|
// JS_CallFunction, so we need an AutoEntryScript.
|
|
// This is Gecko-specific and not in any spec.
|
|
dom::AutoEntryScript aes(CurrentGlobalOrNull(cx),
|
|
"component loader load module");
|
|
JSContext* aescx = aes.cx();
|
|
bool ok;
|
|
if (script) {
|
|
ok = JS_ExecuteScript(aescx, script);
|
|
} else {
|
|
RootedValue rval(cx);
|
|
ok = JS_CallFunction(aescx, obj, function,
|
|
JS::HandleValueArray::empty(), &rval);
|
|
}
|
|
|
|
if (!ok) {
|
|
if (aPropagateExceptions && aes.HasException()) {
|
|
// Ignore return value because we're returning an error code
|
|
// anyway.
|
|
Unused << aes.StealException(aException);
|
|
}
|
|
aObject.set(nullptr);
|
|
aTableScript.set(nullptr);
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
}
|
|
|
|
/* Freed when we remove from the table. */
|
|
*aLocation = ToNewCString(nativePath);
|
|
if (!*aLocation) {
|
|
aObject.set(nullptr);
|
|
aTableScript.set(nullptr);
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
void
|
|
mozJSComponentLoader::UnloadModules()
|
|
{
|
|
mInitialized = false;
|
|
|
|
if (mLoaderGlobal) {
|
|
MOZ_ASSERT(mReuseLoaderGlobal, "How did this happen?");
|
|
|
|
dom::AutoJSAPI jsapi;
|
|
jsapi.Init();
|
|
JSContext* cx = jsapi.cx();
|
|
RootedObject global(cx, mLoaderGlobal->GetJSObject());
|
|
if (global) {
|
|
JSAutoCompartment ac(cx, global);
|
|
if (JS_HasExtensibleLexicalEnvironment(global)) {
|
|
JS_SetAllNonReservedSlotsToUndefined(cx, JS_ExtensibleLexicalEnvironment(global));
|
|
}
|
|
JS_SetAllNonReservedSlotsToUndefined(cx, global);
|
|
} else {
|
|
NS_WARNING("Going to leak!");
|
|
}
|
|
|
|
mLoaderGlobal = nullptr;
|
|
}
|
|
|
|
mInProgressImports.Clear();
|
|
mImports.Clear();
|
|
|
|
for (auto iter = mModules.Iter(); !iter.Done(); iter.Next()) {
|
|
iter.Data()->Clear();
|
|
iter.Remove();
|
|
}
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
mozJSComponentLoader::Import(const nsACString& registryLocation,
|
|
HandleValue targetValArg,
|
|
JSContext* cx,
|
|
uint8_t optionalArgc,
|
|
MutableHandleValue retval)
|
|
{
|
|
MOZ_ASSERT(nsContentUtils::IsCallerChrome());
|
|
|
|
RootedValue targetVal(cx, targetValArg);
|
|
RootedObject targetObject(cx, nullptr);
|
|
if (optionalArgc) {
|
|
// The caller passed in the optional second argument. Get it.
|
|
if (targetVal.isObject()) {
|
|
// If we're passing in something like a content DOM window, chances
|
|
// are the caller expects the properties to end up on the object
|
|
// proper and not on the Xray holder. This is dubious, but can be used
|
|
// during testing. Given that dumb callers can already leak JSMs into
|
|
// content by passing a raw content JS object (where Xrays aren't
|
|
// possible), we aim for consistency here. Waive xray.
|
|
if (WrapperFactory::IsXrayWrapper(&targetVal.toObject()) &&
|
|
!WrapperFactory::WaiveXrayAndWrap(cx, &targetVal))
|
|
{
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
targetObject = &targetVal.toObject();
|
|
} else if (!targetVal.isNull()) {
|
|
// If targetVal isNull(), we actually want to leave targetObject null.
|
|
// Not doing so breaks |make package|.
|
|
return ReportOnCallerUTF8(cx, ERROR_SCOPE_OBJ,
|
|
PromiseFlatCString(registryLocation).get());
|
|
}
|
|
} else {
|
|
nsresult rv = FindTargetObject(cx, &targetObject);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
}
|
|
|
|
Maybe<JSAutoCompartment> ac;
|
|
if (targetObject) {
|
|
ac.emplace(cx, targetObject);
|
|
}
|
|
|
|
RootedObject global(cx);
|
|
nsresult rv = ImportInto(registryLocation, targetObject, cx, &global);
|
|
|
|
if (global) {
|
|
if (!JS_WrapObject(cx, &global)) {
|
|
NS_ERROR("can't wrap return value");
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
retval.setObject(*global);
|
|
}
|
|
return rv;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
mozJSComponentLoader::ImportInto(const nsACString& aLocation,
|
|
JSObject* aTargetObj,
|
|
nsAXPCNativeCallContext* cc,
|
|
JSObject** _retval)
|
|
{
|
|
JSContext* callercx;
|
|
nsresult rv = cc->GetJSContext(&callercx);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
RootedObject targetObject(callercx, aTargetObj);
|
|
RootedObject global(callercx);
|
|
rv = ImportInto(aLocation, targetObject, callercx, &global);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
*_retval = global;
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
mozJSComponentLoader::IsModuleLoaded(const nsACString& aLocation,
|
|
bool* retval)
|
|
{
|
|
MOZ_ASSERT(nsContentUtils::IsCallerChrome());
|
|
|
|
nsresult rv;
|
|
if (!mInitialized) {
|
|
rv = ReallyInit();
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
}
|
|
|
|
ComponentLoaderInfo info(aLocation);
|
|
rv = info.EnsureKey();
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
*retval = !!mImports.Get(info.Key());
|
|
return NS_OK;
|
|
}
|
|
|
|
static JSObject*
|
|
ResolveModuleObjectPropertyById(JSContext* aCx, HandleObject aModObj, HandleId id)
|
|
{
|
|
if (JS_HasExtensibleLexicalEnvironment(aModObj)) {
|
|
RootedObject lexical(aCx, JS_ExtensibleLexicalEnvironment(aModObj));
|
|
bool found;
|
|
if (!JS_HasOwnPropertyById(aCx, lexical, id, &found)) {
|
|
return nullptr;
|
|
}
|
|
if (found) {
|
|
return lexical;
|
|
}
|
|
}
|
|
return aModObj;
|
|
}
|
|
|
|
nsresult
|
|
mozJSComponentLoader::ImportInto(const nsACString& aLocation,
|
|
HandleObject targetObj,
|
|
JSContext* callercx,
|
|
MutableHandleObject vp)
|
|
{
|
|
vp.set(nullptr);
|
|
|
|
nsresult rv;
|
|
if (!mInitialized) {
|
|
rv = ReallyInit();
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
}
|
|
|
|
ComponentLoaderInfo info(aLocation);
|
|
rv = info.EnsureResolvedURI();
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
// get the JAR if there is one
|
|
nsCOMPtr<nsIJARURI> jarURI;
|
|
jarURI = do_QueryInterface(info.ResolvedURI(), &rv);
|
|
nsCOMPtr<nsIFileURL> baseFileURL;
|
|
if (NS_SUCCEEDED(rv)) {
|
|
nsCOMPtr<nsIURI> baseURI;
|
|
while (jarURI) {
|
|
jarURI->GetJARFile(getter_AddRefs(baseURI));
|
|
jarURI = do_QueryInterface(baseURI, &rv);
|
|
}
|
|
baseFileURL = do_QueryInterface(baseURI, &rv);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
} else {
|
|
baseFileURL = do_QueryInterface(info.ResolvedURI(), &rv);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
}
|
|
|
|
nsCOMPtr<nsIFile> sourceFile;
|
|
rv = baseFileURL->GetFile(getter_AddRefs(sourceFile));
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
nsCOMPtr<nsIFile> sourceLocalFile;
|
|
sourceLocalFile = do_QueryInterface(sourceFile, &rv);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
rv = info.EnsureKey();
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
ModuleEntry* mod;
|
|
nsAutoPtr<ModuleEntry> newEntry;
|
|
if (!mImports.Get(info.Key(), &mod) && !mInProgressImports.Get(info.Key(), &mod)) {
|
|
newEntry = new ModuleEntry(RootingContext::get(callercx));
|
|
if (!newEntry)
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
mInProgressImports.Put(info.Key(), newEntry);
|
|
|
|
rv = info.EnsureURI();
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
RootedValue exception(callercx);
|
|
rv = ObjectForLocation(info, sourceLocalFile, &newEntry->obj,
|
|
&newEntry->thisObjectKey,
|
|
&newEntry->location, true, &exception);
|
|
|
|
mInProgressImports.Remove(info.Key());
|
|
|
|
if (NS_FAILED(rv)) {
|
|
if (!exception.isUndefined()) {
|
|
// An exception was thrown during compilation. Propagate it
|
|
// out to our caller so they can report it.
|
|
if (!JS_WrapValue(callercx, &exception))
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
JS_SetPendingException(callercx, exception);
|
|
return NS_OK;
|
|
}
|
|
|
|
// Something failed, but we don't know what it is, guess.
|
|
return NS_ERROR_FILE_NOT_FOUND;
|
|
}
|
|
|
|
// Set the location information for the new global, so that tools like
|
|
// about:memory may use that information
|
|
if (!mReuseLoaderGlobal) {
|
|
xpc::SetLocationForGlobal(newEntry->obj, aLocation);
|
|
}
|
|
|
|
mod = newEntry;
|
|
}
|
|
|
|
MOZ_ASSERT(mod->obj, "Import table contains entry with no object");
|
|
vp.set(mod->obj);
|
|
|
|
if (targetObj) {
|
|
// cxhelper must be created before jsapi, so that jsapi is detroyed and
|
|
// pops any context it has pushed before we report to the caller context.
|
|
JSCLContextHelper cxhelper(callercx);
|
|
|
|
// Even though we are calling JS_SetPropertyById on targetObj, we want
|
|
// to ensure that we never run script here, so we use an AutoJSAPI and
|
|
// not an AutoEntryScript.
|
|
dom::AutoJSAPI jsapi;
|
|
jsapi.Init();
|
|
JSContext* cx = jsapi.cx();
|
|
JSAutoCompartment ac(cx, mod->obj);
|
|
|
|
RootedValue symbols(cx);
|
|
RootedObject exportedSymbolsHolder(cx, ResolveModuleObjectProperty(cx, mod->obj,
|
|
"EXPORTED_SYMBOLS"));
|
|
if (!exportedSymbolsHolder ||
|
|
!JS_GetProperty(cx, exportedSymbolsHolder,
|
|
"EXPORTED_SYMBOLS", &symbols)) {
|
|
nsCString location;
|
|
rv = info.GetLocation(location);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
return ReportOnCallerUTF8(cxhelper, ERROR_NOT_PRESENT,
|
|
location.get());
|
|
}
|
|
|
|
bool isArray;
|
|
if (!JS_IsArrayObject(cx, symbols, &isArray)) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
if (!isArray) {
|
|
nsCString location;
|
|
rv = info.GetLocation(location);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
return ReportOnCallerUTF8(cxhelper, ERROR_NOT_AN_ARRAY,
|
|
location.get());
|
|
}
|
|
|
|
RootedObject symbolsObj(cx, &symbols.toObject());
|
|
|
|
// Iterate over symbols array, installing symbols on targetObj:
|
|
|
|
uint32_t symbolCount = 0;
|
|
if (!JS_GetArrayLength(cx, symbolsObj, &symbolCount)) {
|
|
nsCString location;
|
|
rv = info.GetLocation(location);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
return ReportOnCallerUTF8(cxhelper, ERROR_GETTING_ARRAY_LENGTH,
|
|
location.get());
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
nsAutoCString logBuffer;
|
|
#endif
|
|
|
|
RootedValue value(cx);
|
|
RootedId symbolId(cx);
|
|
RootedObject symbolHolder(cx);
|
|
for (uint32_t i = 0; i < symbolCount; ++i) {
|
|
if (!JS_GetElement(cx, symbolsObj, i, &value) ||
|
|
!value.isString() ||
|
|
!JS_ValueToId(cx, value, &symbolId)) {
|
|
nsCString location;
|
|
rv = info.GetLocation(location);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
return ReportOnCallerUTF8(cxhelper, ERROR_ARRAY_ELEMENT,
|
|
location.get(), i);
|
|
}
|
|
|
|
symbolHolder = ResolveModuleObjectPropertyById(cx, mod->obj, symbolId);
|
|
if (!symbolHolder ||
|
|
!JS_GetPropertyById(cx, symbolHolder, symbolId, &value)) {
|
|
JSAutoByteString bytes;
|
|
RootedString symbolStr(cx, JSID_TO_STRING(symbolId));
|
|
if (!bytes.encodeUtf8(cx, symbolStr))
|
|
return NS_ERROR_FAILURE;
|
|
nsCString location;
|
|
rv = info.GetLocation(location);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
return ReportOnCallerUTF8(cxhelper, ERROR_GETTING_SYMBOL,
|
|
location.get(), bytes.ptr());
|
|
}
|
|
|
|
JSAutoCompartment target_ac(cx, targetObj);
|
|
|
|
if (!JS_WrapValue(cx, &value) ||
|
|
!JS_SetPropertyById(cx, targetObj, symbolId, value)) {
|
|
JSAutoByteString bytes;
|
|
RootedString symbolStr(cx, JSID_TO_STRING(symbolId));
|
|
if (!bytes.encodeUtf8(cx, symbolStr))
|
|
return NS_ERROR_FAILURE;
|
|
nsCString location;
|
|
rv = info.GetLocation(location);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
return ReportOnCallerUTF8(cxhelper, ERROR_SETTING_SYMBOL,
|
|
location.get(), bytes.ptr());
|
|
}
|
|
#ifdef DEBUG
|
|
if (i == 0) {
|
|
logBuffer.AssignLiteral("Installing symbols [ ");
|
|
}
|
|
JSAutoByteString bytes(cx, JSID_TO_STRING(symbolId));
|
|
if (!!bytes)
|
|
logBuffer.Append(bytes.ptr());
|
|
logBuffer.Append(' ');
|
|
if (i == symbolCount - 1) {
|
|
nsCString location;
|
|
rv = info.GetLocation(location);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
LOG(("%s] from %s\n", logBuffer.get(), location.get()));
|
|
}
|
|
#endif
|
|
}
|
|
}
|
|
|
|
// Cache this module for later
|
|
if (newEntry) {
|
|
mImports.Put(info.Key(), newEntry);
|
|
newEntry.forget();
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
mozJSComponentLoader::Unload(const nsACString & aLocation)
|
|
{
|
|
nsresult rv;
|
|
|
|
if (!mInitialized) {
|
|
return NS_OK;
|
|
}
|
|
|
|
MOZ_RELEASE_ASSERT(!mReuseLoaderGlobal, "Module unloading not supported when "
|
|
"compartment sharing is enabled");
|
|
|
|
ComponentLoaderInfo info(aLocation);
|
|
rv = info.EnsureKey();
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
ModuleEntry* mod;
|
|
if (mImports.Get(info.Key(), &mod)) {
|
|
mImports.Remove(info.Key());
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
mozJSComponentLoader::Observe(nsISupports* subject, const char* topic,
|
|
const char16_t* data)
|
|
{
|
|
if (!strcmp(topic, "xpcom-shutdown-loaders")) {
|
|
UnloadModules();
|
|
} else {
|
|
NS_ERROR("Unexpected observer topic.");
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
size_t
|
|
mozJSComponentLoader::ModuleEntry::SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const
|
|
{
|
|
size_t n = aMallocSizeOf(this);
|
|
n += aMallocSizeOf(location);
|
|
|
|
return n;
|
|
}
|
|
|
|
/* static */ already_AddRefed<nsIFactory>
|
|
mozJSComponentLoader::ModuleEntry::GetFactory(const mozilla::Module& module,
|
|
const mozilla::Module::CIDEntry& entry)
|
|
{
|
|
const ModuleEntry& self = static_cast<const ModuleEntry&>(module);
|
|
MOZ_ASSERT(self.getfactoryobj, "Handing out an uninitialized module?");
|
|
|
|
nsCOMPtr<nsIFactory> f;
|
|
nsresult rv = self.getfactoryobj->Get(*entry.cid, getter_AddRefs(f));
|
|
if (NS_FAILED(rv))
|
|
return nullptr;
|
|
|
|
return f.forget();
|
|
}
|
|
|
|
//----------------------------------------------------------------------
|
|
|
|
JSCLContextHelper::JSCLContextHelper(JSContext* aCx)
|
|
: mContext(aCx)
|
|
, mBuf(nullptr)
|
|
{
|
|
}
|
|
|
|
JSCLContextHelper::~JSCLContextHelper()
|
|
{
|
|
if (mBuf) {
|
|
JS_ReportErrorUTF8(mContext, "%s", mBuf);
|
|
JS_smprintf_free(mBuf);
|
|
}
|
|
}
|
|
|
|
void
|
|
JSCLContextHelper::reportErrorAfterPop(char* buf)
|
|
{
|
|
MOZ_ASSERT(!mBuf, "Already called reportErrorAfterPop");
|
|
mBuf = buf;
|
|
}
|