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authorMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
committerMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
commit5f8de423f190bbb79a62f804151bc24824fa32d8 (patch)
tree10027f336435511475e392454359edea8e25895d /xpcom/components/nsNativeModuleLoader.cpp
parent49ee0794b5d912db1f95dce6eb52d781dc210db5 (diff)
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Add m-esr52 at 52.6.0
Diffstat (limited to 'xpcom/components/nsNativeModuleLoader.cpp')
-rw-r--r--xpcom/components/nsNativeModuleLoader.cpp220
1 files changed, 220 insertions, 0 deletions
diff --git a/xpcom/components/nsNativeModuleLoader.cpp b/xpcom/components/nsNativeModuleLoader.cpp
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+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ * This Original Code has been modified by IBM Corporation.
+ * Modifications made by IBM described herein are
+ * Copyright (c) International Business Machines
+ * Corporation, 2000
+ *
+ * Modifications to Mozilla code or documentation
+ * identified per MPL Section 3.3
+ *
+ * Date Modified by Description of modification
+ * 04/20/2000 IBM Corp. Added PR_CALLBACK for Optlink use in OS2
+ */
+
+#include "nsNativeModuleLoader.h"
+
+#include "mozilla/Logging.h"
+#include "prinit.h"
+#include "prerror.h"
+
+#include "nsComponentManager.h"
+#include "ManifestParser.h" // for LogMessage
+#include "nsCRTGlue.h"
+#include "nsThreadUtils.h"
+#include "nsTraceRefcnt.h"
+
+#include "nsIFile.h"
+#include "mozilla/WindowsDllBlocklist.h"
+
+#ifdef XP_WIN
+#include <windows.h>
+#endif
+
+#ifdef XP_MACOSX
+#include <signal.h>
+#endif
+
+#ifdef DEBUG
+#define IMPLEMENT_BREAK_AFTER_LOAD
+#endif
+
+using namespace mozilla;
+
+static LazyLogModule sNativeModuleLoaderLog("nsNativeModuleLoader");
+#define LOG(level, args) MOZ_LOG(sNativeModuleLoaderLog, level, args)
+
+nsresult
+nsNativeModuleLoader::Init()
+{
+ MOZ_ASSERT(NS_IsMainThread(), "Startup not on main thread?");
+ LOG(LogLevel::Debug, ("nsNativeModuleLoader::Init()"));
+ return NS_OK;
+}
+
+class LoadModuleMainThreadRunnable : public Runnable
+{
+public:
+ LoadModuleMainThreadRunnable(nsNativeModuleLoader* aLoader,
+ FileLocation& aFile)
+ : mManager(nsComponentManagerImpl::gComponentManager)
+ , mLoader(aLoader)
+ , mFile(aFile)
+ , mResult(nullptr)
+ {
+ }
+
+ NS_IMETHOD Run() override
+ {
+ mResult = mLoader->LoadModule(mFile);
+ return NS_OK;
+ }
+
+ RefPtr<nsComponentManagerImpl> mManager;
+ nsNativeModuleLoader* mLoader;
+ FileLocation mFile;
+ const mozilla::Module* mResult;
+};
+
+const mozilla::Module*
+nsNativeModuleLoader::LoadModule(FileLocation& aFile)
+{
+ if (aFile.IsZip()) {
+ NS_ERROR("Binary components cannot be loaded from JARs");
+ return nullptr;
+ }
+ nsCOMPtr<nsIFile> file = aFile.GetBaseFile();
+ nsresult rv;
+
+ if (!NS_IsMainThread()) {
+ // If this call is off the main thread, synchronously proxy it
+ // to the main thread.
+ RefPtr<LoadModuleMainThreadRunnable> r =
+ new LoadModuleMainThreadRunnable(this, aFile);
+ NS_DispatchToMainThread(r, NS_DISPATCH_SYNC);
+ return r->mResult;
+ }
+
+ nsCOMPtr<nsIHashable> hashedFile(do_QueryInterface(file));
+ if (!hashedFile) {
+ NS_ERROR("nsIFile is not nsIHashable");
+ return nullptr;
+ }
+
+ nsAutoCString filePath;
+ file->GetNativePath(filePath);
+
+ NativeLoadData data;
+
+ if (mLibraries.Get(hashedFile, &data)) {
+ NS_ASSERTION(data.mModule, "Corrupt mLibraries hash");
+ LOG(LogLevel::Debug,
+ ("nsNativeModuleLoader::LoadModule(\"%s\") - found in cache",
+ filePath.get()));
+ return data.mModule;
+ }
+
+ // We haven't loaded this module before
+ {
+#ifdef HAS_DLL_BLOCKLIST
+ AutoSetXPCOMLoadOnMainThread guard;
+#endif
+ rv = file->Load(&data.mLibrary);
+ }
+
+ if (NS_FAILED(rv)) {
+ char errorMsg[1024] = "<unknown; can't get error from NSPR>";
+
+ if (PR_GetErrorTextLength() < (int)sizeof(errorMsg)) {
+ PR_GetErrorText(errorMsg);
+ }
+
+ LogMessage("Failed to load native module at path '%s': (%lx) %s",
+ filePath.get(), rv, errorMsg);
+
+ return nullptr;
+ }
+
+#ifdef IMPLEMENT_BREAK_AFTER_LOAD
+ nsAutoCString leafName;
+ file->GetNativeLeafName(leafName);
+
+ char* env = getenv("XPCOM_BREAK_ON_LOAD");
+ char* blist;
+ if (env && *env && (blist = strdup(env))) {
+ char* nextTok = blist;
+ while (char* token = NS_strtok(":", &nextTok)) {
+ if (leafName.Find(token, true) != kNotFound) {
+ NS_BREAK();
+ }
+ }
+
+ free(blist);
+ }
+#endif
+
+ void* module = PR_FindSymbol(data.mLibrary, "NSModule");
+ if (!module) {
+ LogMessage("Native module at path '%s' doesn't export symbol `NSModule`.",
+ filePath.get());
+ PR_UnloadLibrary(data.mLibrary);
+ return nullptr;
+ }
+
+ data.mModule = *(mozilla::Module const* const*)module;
+ if (mozilla::Module::kVersion != data.mModule->mVersion) {
+ LogMessage("Native module at path '%s' is incompatible with this version of Firefox, has version %i, expected %i.",
+ filePath.get(), data.mModule->mVersion,
+ mozilla::Module::kVersion);
+ PR_UnloadLibrary(data.mLibrary);
+ return nullptr;
+ }
+
+ mLibraries.Put(hashedFile, data); // infallible
+ return data.mModule;
+}
+
+void
+nsNativeModuleLoader::UnloadLibraries()
+{
+ MOZ_ASSERT(NS_IsMainThread(), "Shutdown not on main thread?");
+
+ for (auto iter = mLibraries.Iter(); !iter.Done(); iter.Next()) {
+ NativeLoadData& loadData = iter.Data();
+ loadData.mModule = nullptr;
+ }
+
+ for (auto iter = mLibraries.Iter(); !iter.Done(); iter.Next()) {
+ if (MOZ_LOG_TEST(sNativeModuleLoaderLog, LogLevel::Debug)) {
+ nsIHashable* hashedFile = iter.Key();
+ nsCOMPtr<nsIFile> file(do_QueryInterface(hashedFile));
+
+ nsAutoCString filePath;
+ file->GetNativePath(filePath);
+
+ LOG(LogLevel::Debug,
+ ("nsNativeModuleLoader::UnloaderFunc(\"%s\")", filePath.get()));
+ }
+
+#ifdef NS_BUILD_REFCNT_LOGGING
+ nsTraceRefcnt::SetActivityIsLegal(false);
+#endif
+
+#if 0
+ // XXXbsmedberg: do this as soon as the static-destructor crash(es)
+ // are fixed
+ NativeLoadData& loadData = iter.Data();
+ PRStatus ret = PR_UnloadLibrary(loadData.mLibrary);
+ NS_ASSERTION(ret == PR_SUCCESS, "Failed to unload library");
+#endif
+
+#ifdef NS_BUILD_REFCNT_LOGGING
+ nsTraceRefcnt::SetActivityIsLegal(true);
+#endif
+
+ iter.Remove();
+ }
+}