C++ CompartmentOptions::setZone方法代码示例

JSContext*
XPCJSContextStack::InitSafeJSContext()
{
    MOZ_ASSERT(!mSafeJSContext);

    // Start by getting the principal holder and principal for this
    // context.  If we can't manage that, don't bother with the rest.
    nsRefPtr<nsNullPrincipal> principal = new nsNullPrincipal();
    nsresult rv = principal->Init();
    if (NS_FAILED(rv))
        MOZ_CRASH();

    nsXPConnect* xpc = nsXPConnect::XPConnect();
    JSRuntime *rt = xpc->GetRuntime()->Runtime();
    if (!rt)
        MOZ_CRASH();

    mSafeJSContext = JS_NewContext(rt, 8192);
    if (!mSafeJSContext)
        MOZ_CRASH();
    JSAutoRequest req(mSafeJSContext);
    ContextOptionsRef(mSafeJSContext).setNoDefaultCompartmentObject(true);

    JS_SetErrorReporter(mSafeJSContext, xpc::SystemErrorReporter);

    // Note - We intentionally avoid firing OnNewGlobalObject while
    // simultaneously skipping the call to setInvisibleToDebugger(true) here.
    // This lets us piggy-back on the assertions in the JS engine (which make
    // sure that, for non-invisible globals, we always fire onNewGlobalObject
    // before creating scripts), to assert that we never create scripts with
    // the SafeJSContextGlobal. This is all happening way before anyone could be
    // listening for debugger notifications anyway.
    JS::CompartmentOptions options;
    options.setZone(JS::SystemZone)
           .setTrace(TraceXPCGlobal);
    mSafeJSContextGlobal = CreateGlobalObject(mSafeJSContext,
                                              &SafeJSContextGlobalClass,
                                              principal, options);
    if (!mSafeJSContextGlobal)
        MOZ_CRASH();

    nsRefPtr<SandboxPrivate> sp = new SandboxPrivate(principal, mSafeJSContextGlobal);
    JS_SetPrivate(mSafeJSContextGlobal, sp.forget().take());
    return mSafeJSContext;
}

GlobalObject *
JSRuntime::createSelfHostingGlobal(JSContext *cx)
{
    MOZ_ASSERT(!cx->isExceptionPending());
    MOZ_ASSERT(!cx->runtime()->isAtomsCompartment(cx->compartment()));

    JS::CompartmentOptions options;
    options.setDiscardSource(true);
    options.setZone(JS::FreshZone);

    JSCompartment *compartment = NewCompartment(cx, nullptr, nullptr, options);
    if (!compartment)
        return nullptr;

    static const Class shgClass = {
        "self-hosting-global", JSCLASS_GLOBAL_FLAGS,
        nullptr, nullptr, nullptr, nullptr,
        nullptr, nullptr, nullptr, nullptr,
        nullptr, nullptr, nullptr,
        JS_GlobalObjectTraceHook
    };

    AutoCompartment ac(cx, compartment);
    Rooted<GlobalObject*> shg(cx, GlobalObject::createInternal(cx, &shgClass));
    if (!shg)
        return nullptr;

    cx->runtime()->selfHostingGlobal_ = shg;
    compartment->isSelfHosting = true;
    compartment->isSystem = true;

    if (!GlobalObject::initSelfHostingBuiltins(cx, shg, intrinsic_functions))
        return nullptr;

    JS_FireOnNewGlobalObject(cx, shg);

    return shg;
}

  nsresult Init()
  {
    mRuntime = JS_NewRuntime(sRuntimeHeapSize, JS_NO_HELPER_THREADS);
    NS_ENSURE_TRUE(mRuntime, NS_ERROR_OUT_OF_MEMORY);

    /*
     * Not setting this will cause JS_CHECK_RECURSION to report false
     * positives
     */
    JS_SetNativeStackQuota(mRuntime, 128 * sizeof(size_t) * 1024); 

    mContext = JS_NewContext(mRuntime, 0);
    NS_ENSURE_TRUE(mContext, NS_ERROR_OUT_OF_MEMORY);

    JSAutoRequest ar(mContext);

    JS::CompartmentOptions options;
    options.setZone(JS::SystemZone)
           .setVersion(JSVERSION_LATEST);
    mGlobal = JS_NewGlobalObject(mContext, &sGlobalClass, nullptr,
                                 JS::DontFireOnNewGlobalHook, options);
    NS_ENSURE_TRUE(mGlobal, NS_ERROR_OUT_OF_MEMORY);
    JS::Rooted<JSObject*> global(mContext, mGlobal);

    JSAutoCompartment ac(mContext, global);
    js::SetDefaultObjectForContext(mContext, global);
    JS_InitStandardClasses(mContext, global);

    JS_SetErrorReporter(mContext, PACErrorReporter);

    if (!JS_DefineFunctions(mContext, global, PACGlobalFunctions))
      return NS_ERROR_FAILURE;

    JS_FireOnNewGlobalObject(mContext, global);

    return NS_OK;
  }

//.........这里部分代码省略.........
                    fprintf(gErrFile, "+++ Failed to obtain SystemPrincipal from ScriptSecurityManager service.\n");
                } else {
                    // fetch the JS principals and stick in a global
                    gJSPrincipals = nsJSPrincipals::get(systemprincipal);
                    JS_HoldPrincipals(gJSPrincipals);
                }
            } else {
                fprintf(gErrFile, "+++ Failed to get ScriptSecurityManager service, running without principals");
            }
        }

        const JSSecurityCallbacks* scb = JS_GetSecurityCallbacks(rt);
        MOZ_ASSERT(scb, "We are assuming that nsScriptSecurityManager::Init() has been run");
        shellSecurityCallbacks = *scb;
        JS_SetSecurityCallbacks(rt, &shellSecurityCallbacks);

#ifdef TEST_TranslateThis
        nsCOMPtr<nsIXPCFunctionThisTranslator>
            translator(new nsXPCFunctionThisTranslator);
        xpc->SetFunctionThisTranslator(NS_GET_IID(nsITestXPCFunctionCallback), translator);
#endif

        nsRefPtr<BackstagePass> backstagePass;
        rv = NS_NewBackstagePass(getter_AddRefs(backstagePass));
        if (NS_FAILED(rv)) {
            fprintf(gErrFile, "+++ Failed to create BackstagePass: %8x\n",
                    static_cast<uint32_t>(rv));
            return 1;
        }

        // Make the default XPCShell global use a fresh zone (rather than the
        // System Zone) to improve cross-zone test coverage.
        JS::CompartmentOptions options;
        options.setZone(JS::FreshZone)
               .setVersion(JSVERSION_LATEST);
        nsCOMPtr<nsIXPConnectJSObjectHolder> holder;
        rv = xpc->InitClassesWithNewWrappedGlobal(cx,
                                                  static_cast<nsIGlobalObject*>(backstagePass),
                                                  systemprincipal,
                                                  0,
                                                  options,
                                                  getter_AddRefs(holder));
        if (NS_FAILED(rv))
            return 1;

        {
            JS::Rooted<JSObject*> glob(cx, holder->GetJSObject());
            if (!glob) {
                return 1;
            }

            // Even if we're building in a configuration where source is
            // discarded, there's no reason to do that on XPCShell, and doing so
            // might break various automation scripts.
            JS::CompartmentOptionsRef(glob).setDiscardSource(false);

            backstagePass->SetGlobalObject(glob);

            JSAutoCompartment ac(cx, glob);

            if (!JS_InitReflect(cx, glob)) {
                return 1;
            }

            if (!JS_DefineFunctions(cx, glob, glob_functions) ||
                !JS_DefineProfilingFunctions(cx, glob)) {

bool
XPCShellEnvironment::Init()
{
    nsresult rv;

#ifdef HAVE_SETBUF
    // unbuffer stdout so that output is in the correct order; note that stderr
    // is unbuffered by default
    setbuf(stdout, 0);
#endif

    nsCOMPtr<nsIJSRuntimeService> rtsvc =
        do_GetService("@mozilla.org/js/xpc/RuntimeService;1");
    if (!rtsvc) {
        NS_ERROR("failed to get nsJSRuntimeService!");
        return false;
    }

    JSRuntime *rt;
    if (NS_FAILED(rtsvc->GetRuntime(&rt)) || !rt) {
        NS_ERROR("failed to get JSRuntime from nsJSRuntimeService!");
        return false;
    }

    if (!mGlobalHolder.Hold(rt)) {
        NS_ERROR("Can't protect global object!");
        return false;
    }

    gOldContextCallback = JS_SetContextCallback(rt, ContextCallback);

    JSContext *cx = JS_NewContext(rt, 8192);
    if (!cx) {
        NS_ERROR("JS_NewContext failed!");

        JS_SetContextCallback(rt, gOldContextCallback);
        gOldContextCallback = NULL;

        return false;
    }
    mCx = cx;

    JS_SetContextPrivate(cx, this);

    nsCOMPtr<nsIXPConnect> xpc =
      do_GetService(nsIXPConnect::GetCID());
    if (!xpc) {
        NS_ERROR("failed to get nsXPConnect service!");
        return false;
    }

    nsCOMPtr<nsIPrincipal> principal;
    nsCOMPtr<nsIScriptSecurityManager> securityManager =
        do_GetService(NS_SCRIPTSECURITYMANAGER_CONTRACTID, &rv);
    if (NS_SUCCEEDED(rv) && securityManager) {
        rv = securityManager->GetSystemPrincipal(getter_AddRefs(principal));
        if (NS_FAILED(rv)) {
            fprintf(stderr, "+++ Failed to obtain SystemPrincipal from ScriptSecurityManager service.\n");
        } else {
            // fetch the JS principals and stick in a global
            mJSPrincipals = nsJSPrincipals::get(principal);
            JS_HoldPrincipals(mJSPrincipals);
        }
    } else {
        fprintf(stderr, "+++ Failed to get ScriptSecurityManager service, running without principals");
    }

    nsCxPusher pusher;
    pusher.Push(mCx);

    nsRefPtr<BackstagePass> backstagePass;
    rv = NS_NewBackstagePass(getter_AddRefs(backstagePass));
    if (NS_FAILED(rv)) {
        NS_ERROR("Failed to create backstage pass!");
        return false;
    }

    JS::CompartmentOptions options;
    options.setZone(JS::SystemZone)
           .setVersion(JSVERSION_LATEST);
    nsCOMPtr<nsIXPConnectJSObjectHolder> holder;
    rv = xpc->InitClassesWithNewWrappedGlobal(cx,
                                              static_cast<nsIGlobalObject *>(backstagePass),
                                              principal, 0,
                                              options,
                                              getter_AddRefs(holder));
    if (NS_FAILED(rv)) {
        NS_ERROR("InitClassesWithNewWrappedGlobal failed!");
        return false;
    }

    JS::Rooted<JSObject*> globalObj(cx, holder->GetJSObject());
    if (!globalObj) {
        NS_ERROR("Failed to get global JSObject!");
        return false;
    }

    backstagePass->SetGlobalObject(globalObj);

    {
//.........这里部分代码省略.........