Bug 1035125 Part 8: Pass sandboxing pointers through XRE_InitChildProcess instead of linking to more functions in xul. r=aklotz,glandium

MozReview-Commit-ID: 5AiktOArpfU

--HG--
extra : rebase_source : 1ba3be949e2bfeb3b67687ab05d43342852ab764

dom/media/gmp/GMPLoader.cpp

@@ -7,11 +7,9 @@
 #include "GMPLoader.h"
 #include <stdio.h>
 #include "mozilla/Attributes.h"
-#include "mozilla/UniquePtr.h"
 #include "gmp-entrypoints.h"
 #include "prlink.h"
 #include "prenv.h"
-#include "nsAutoPtr.h"
 
 #include <string>
 
@@ -79,8 +77,8 @@ private:
   UniquePtr<GMPAdapter> mAdapter;
 };
 
-GMPLoader* CreateGMPLoader(SandboxStarter* aStarter) {
-  return static_cast<GMPLoader*>(new GMPLoaderImpl(aStarter));
+UniquePtr<GMPLoader> CreateGMPLoader(SandboxStarter* aStarter) {
+  return MakeUnique<GMPLoaderImpl>(aStarter);
 }
 
 class PassThroughGMPAdapter : public GMPAdapter {

dom/media/gmp/GMPLoader.h

@@ -10,6 +10,7 @@
 #include <stdint.h>
 #include "prlink.h"
 #include "gmp-entrypoints.h"
+#include "mozilla/UniquePtr.h"
 
 #if defined(XP_MACOSX) && defined(MOZ_GMP_SANDBOX)
 #include "mozilla/Sandbox.h"
@@ -98,7 +99,7 @@ public:
 
 // On Desktop, this function resides in plugin-container.
 // On Mobile, this function resides in XUL.
-GMPLoader* CreateGMPLoader(SandboxStarter* aStarter);
+UniquePtr<GMPLoader> CreateGMPLoader(SandboxStarter* aStarter);
 
 } // namespace gmp
 } // namespace mozilla

ipc/contentproc/plugin-container.cpp

@@ -25,9 +25,8 @@
 #include "GMPLoader.h"
 
 #if defined(XP_WIN) && defined(MOZ_SANDBOX)
-#include "mozilla/sandboxTarget.h"
-#include "mozilla/sandboxing/loggingCallbacks.h"
-#include "sandbox/win/src/sandbox_factory.h"
+#include "mozilla/sandboxing/SandboxInitialization.h"
+#include "mozilla/sandboxing/sandboxLogging.h"
 #endif
 
 #if defined(XP_LINUX) && defined(MOZ_GMP_SANDBOX)
@@ -86,7 +85,7 @@ class WinSandboxStarter : public mozilla::gmp::SandboxStarter {
 public:
     virtual bool Start(const char *aLibPath) override {
         if (gIsSandboxEnabled) {
-            sandbox::SandboxFactory::GetTargetServices()->LowerToken();
+            mozilla::sandboxing::LowerSandbox();
         }
         return true;
     }
@@ -163,21 +162,17 @@ content_process_main(int argc, char* argv[])
 #endif
     }
 
+    XREChildData childData;
+
 #if defined(XP_WIN) && defined(MOZ_SANDBOX)
     if (gIsSandboxEnabled) {
-        sandbox::TargetServices* target_service =
-            sandbox::SandboxFactory::GetTargetServices();
-        if (!target_service) {
+        childData.sandboxTargetServices =
+            mozilla::sandboxing::GetInitializedTargetServices();
+        if (!childData.sandboxTargetServices) {
             return 1;
         }
 
-        sandbox::ResultCode result = target_service->Init();
-        if (result != sandbox::SBOX_ALL_OK) {
-           return 2;
-        }
-
-        mozilla::SandboxTarget::Instance()->SetTargetServices(target_service);
-        mozilla::sandboxing::PrepareForLogging();
+        childData.ProvideLogFunction = mozilla::sandboxing::ProvideLogFunction;
     }
 #endif
 
@@ -225,16 +220,15 @@ content_process_main(int argc, char* argv[])
         SetDllDirectory(L"");
     }
 #endif
-    nsAutoPtr<mozilla::gmp::GMPLoader> loader;
 #if !defined(MOZ_WIDGET_ANDROID) && !defined(MOZ_WIDGET_GONK)
     // On desktop, the GMPLoader lives in plugin-container, so that its
     // code can be covered by an EME/GMP vendor's voucher.
     nsAutoPtr<mozilla::gmp::SandboxStarter> starter(MakeSandboxStarter());
     if (XRE_GetProcessType() == GeckoProcessType_GMPlugin) {
-        loader = mozilla::gmp::CreateGMPLoader(starter);
+        childData.gmpLoader = mozilla::gmp::CreateGMPLoader(starter);
     }
 #endif
-    nsresult rv = XRE_InitChildProcess(argc, argv, loader);
+    nsresult rv = XRE_InitChildProcess(argc, argv, &childData);
     NS_ENSURE_SUCCESS(rv, 1);
 
     return 0;

mozglue/android/APKOpen.cpp

@@ -35,6 +35,7 @@
 
 #include "mozilla/TimeStamp.h"
 #include "mozilla/UniquePtr.h"
+#include "XREChildData.h"
 
 /* Android headers don't define RUSAGE_THREAD */
 #ifndef RUSAGE_THREAD
@@ -421,6 +422,7 @@ ChildProcessInit(int argc, char* argv[])
 
   fXRE_SetProcessType(argv[--argc]);
 
-  return fXRE_InitChildProcess(argc, argv, nullptr);
+  XREChildData childData;
+  return fXRE_InitChildProcess(argc, argv, &childData);
 }
 

security/sandbox/chromium-shim/sandbox/win/loggingCallbacks.h

@@ -7,53 +7,20 @@
 #ifndef security_sandbox_loggingCallbacks_h__
 #define security_sandbox_loggingCallbacks_h__
 
-#include "mozilla/sandboxing/loggingTypes.h"
-#include "mozilla/sandboxing/sandboxLogging.h"
-
-#ifdef TARGET_SANDBOX_EXPORTS
 #include <sstream>
 #include <iostream>
 
 #include "mozilla/Preferences.h"
+#include "mozilla/sandboxing/loggingTypes.h"
 #include "nsContentUtils.h"
 
 #ifdef MOZ_STACKWALKING
 #include "mozilla/StackWalk.h"
 #endif
 
-#define TARGET_SANDBOX_EXPORT __declspec(dllexport)
-#else
-#define TARGET_SANDBOX_EXPORT __declspec(dllimport)
-#endif
-
 namespace mozilla {
 namespace sandboxing {
 
-// We need to use a callback to work around the fact that sandbox_s lib is
-// linked into plugin-container.exe directly and also via xul.dll via
-// sandboxbroker.dll. This causes problems with holding the state required to
-// implement sandbox logging.
-// So, we provide a callback from plugin-container.exe that the code in xul.dll
-// can call to make sure we hit the right version of the code.
-void TARGET_SANDBOX_EXPORT
-SetProvideLogFunctionCb(ProvideLogFunctionCb aProvideLogFunctionCb);
-
-// Provide a call back so a pointer to a logging function can be passed later.
-static void
-PrepareForLogging()
-{
-  SetProvideLogFunctionCb(ProvideLogFunction);
-}
-
-#ifdef TARGET_SANDBOX_EXPORTS
-static ProvideLogFunctionCb sProvideLogFunctionCb = nullptr;
-
-void
-SetProvideLogFunctionCb(ProvideLogFunctionCb aProvideLogFunctionCb)
-{
-  sProvideLogFunctionCb = aProvideLogFunctionCb;
-}
-
 #ifdef MOZ_STACKWALKING
 static uint32_t sStackTraceDepth = 0;
 
@@ -110,15 +77,15 @@ Log(const char* aMessageType,
 
 // Initialize sandbox logging if required.
 static void
-InitLoggingIfRequired()
+InitLoggingIfRequired(ProvideLogFunctionCb aProvideLogFunctionCb)
 {
-  if (!sProvideLogFunctionCb) {
+  if (!aProvideLogFunctionCb) {
     return;
   }
 
   if (Preferences::GetBool("security.sandbox.windows.log") ||
       PR_GetEnv("MOZ_WIN_SANDBOX_LOGGING")) {
-    sProvideLogFunctionCb(Log);
+    aProvideLogFunctionCb(Log);
 
 #if defined(MOZ_CONTENT_SANDBOX) && defined(MOZ_STACKWALKING)
     // We can only log the stack trace on process types where we know that the
@@ -130,8 +97,8 @@ InitLoggingIfRequired()
 #endif
   }
 }
-#endif
+
 } // sandboxing
 } // mozilla
 
-#endif // security_sandbox_loggingCallbacks_h__
+#endif // security_sandbox_loggingCallbacks_h__

security/sandbox/chromium-shim/sandbox/win/sandboxLogging.h

@@ -13,12 +13,6 @@
 
 #include "loggingTypes.h"
 
-#ifdef SANDBOX_EXPORTS
-#define SANDBOX_EXPORT __declspec(dllexport)
-#else
-#define SANDBOX_EXPORT __declspec(dllimport)
-#endif
-
 namespace sandbox {
 class TargetPolicy;
 }
@@ -28,7 +22,7 @@ namespace sandboxing {
 
 // This is used to pass a LogCallback to the sandboxing code, as the logging
 // requires code to which we cannot link directly.
-void SANDBOX_EXPORT ProvideLogFunction(LogFunction aLogFunction);
+void ProvideLogFunction(LogFunction aLogFunction);
 
 // Set up dummy interceptions via the broker, so we can log calls.
 void ApplyLoggingPolicy(sandbox::TargetPolicy& aPolicy);

security/sandbox/moz.build

@@ -28,6 +28,7 @@ elif CONFIG['OS_ARCH'] == 'WINNT':
         'chromium-shim/sandbox/win/loggingCallbacks.h',
         'chromium-shim/sandbox/win/loggingTypes.h',
         'chromium-shim/sandbox/win/sandboxLogging.h',
+        'win/SandboxInitialization.h',
     ]
 
     SOURCES += [
@@ -128,6 +129,7 @@ elif CONFIG['OS_ARCH'] == 'WINNT':
         'chromium/sandbox/win/src/win2k_threadpool.cc',
         'chromium/sandbox/win/src/win_utils.cc',
         'chromium/sandbox/win/src/window.cc',
+        'win/SandboxInitialization.cpp',
     ]
 
     if CONFIG['CPU_ARCH'] == 'x86_64':

security/sandbox/win/SandboxInitialization.cpp

@@ -0,0 +1,46 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=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/. */
+
+#include "SandboxInitialization.h"
+
+#include "sandbox/win/src/sandbox_factory.h"
+
+namespace mozilla {
+namespace sandboxing {
+
+static sandbox::TargetServices*
+InitializeTargetServices()
+{
+  sandbox::TargetServices* targetServices =
+    sandbox::SandboxFactory::GetTargetServices();
+  if (!targetServices) {
+    return nullptr;
+  }
+
+  if (targetServices->Init() != sandbox::SBOX_ALL_OK) {
+    return nullptr;
+  }
+
+  return targetServices;
+}
+
+sandbox::TargetServices*
+GetInitializedTargetServices()
+{
+  static sandbox::TargetServices* sInitializedTargetServices =
+    InitializeTargetServices();
+
+  return sInitializedTargetServices;
+}
+
+void
+LowerSandbox()
+{
+  GetInitializedTargetServices()->LowerToken();
+}
+
+} // sandboxing
+} // mozilla

security/sandbox/win/SandboxInitialization.h

@@ -0,0 +1,35 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=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/. */
+
+#ifndef mozilla_sandboxing_SandboxInitialization_h
+#define mozilla_sandboxing_SandboxInitialization_h
+
+namespace sandbox {
+class TargetServices;
+}
+
+namespace mozilla {
+// Note the Chromium code just uses a bare sandbox namespace, which makes using
+// sandbox for our namespace painful.
+namespace sandboxing {
+
+/**
+ * Initializes (if required) and returns the Chromium sandbox TargetServices.
+ *
+ * @return the TargetServices or null if the creation or initialization failed.
+ */
+sandbox::TargetServices* GetInitializedTargetServices();
+
+/**
+ * Lowers the permissions on the process sandbox.
+ * Provided because the GMP sandbox needs to be lowered from the executable.
+ */
+void LowerSandbox();
+
+} // sandboxing
+} // mozilla
+
+#endif // mozilla_sandboxing_SandboxInitialization_h

security/sandbox/win/src/sandboxtarget/sandboxTarget.h

@@ -12,17 +12,10 @@
 #include "mozilla/Assertions.h"
 #include "base/MissingBasicTypes.h"
 #include "sandbox/win/src/sandbox.h"
-#include "sandbox/win/src/target_services.h"
 
-#ifdef TARGET_SANDBOX_EXPORTS
-#define TARGET_SANDBOX_EXPORT __declspec(dllexport)
-#else
-#define TARGET_SANDBOX_EXPORT __declspec(dllimport)
-#endif
 namespace mozilla {
 
-
-class TARGET_SANDBOX_EXPORT SandboxTarget
+class SandboxTarget
 {
 public:
   /**

toolkit/xre/moz.build

@@ -159,6 +159,12 @@ LOCAL_INCLUDES += [
     '/xpcom/build',
 ]
 
+if CONFIG['MOZ_SANDBOX'] and CONFIG['OS_ARCH'] == 'WINNT':
+    LOCAL_INCLUDES += [
+        '/security/sandbox/chromium',
+        '/security/sandbox/chromium-shim',
+    ]
+
 if CONFIG['MOZ_WIDGET_TOOLKIT'] == 'cocoa':
     LOCAL_INCLUDES += [
         '/widget',

toolkit/xre/nsEmbedFunctions.cpp

@@ -79,7 +79,7 @@
  #include "base/histogram.h"
 
 #if defined(MOZ_SANDBOX) && defined(XP_WIN)
-#define TARGET_SANDBOX_EXPORTS
+#include "mozilla/sandboxTarget.h"
 #include "mozilla/sandboxing/loggingCallbacks.h"
 #endif
 
@@ -297,11 +297,12 @@ SetTaskbarGroupId(const nsString& aId)
 nsresult
 XRE_InitChildProcess(int aArgc,
                      char* aArgv[],
-                     GMPLoader* aGMPLoader)
+                     const XREChildData* aChildData)
 {
   NS_ENSURE_ARG_MIN(aArgc, 2);
   NS_ENSURE_ARG_POINTER(aArgv);
   NS_ENSURE_ARG_POINTER(aArgv[0]);
+  MOZ_ASSERT(aChildData);
 
 #ifdef HAS_DLL_BLOCKLIST
   DllBlocklist_Initialize();
@@ -314,13 +315,13 @@ XRE_InitChildProcess(int aArgc,
 #if !defined(MOZ_WIDGET_ANDROID) && !defined(MOZ_WIDGET_GONK)
   // On non-Fennec Gecko, the GMPLoader code resides in plugin-container,
   // and we must forward it through to the GMP code here.
-  GMPProcessChild::SetGMPLoader(aGMPLoader);
+  GMPProcessChild::SetGMPLoader(aChildData->gmpLoader.get());
 #else
   // On Fennec, the GMPLoader's code resides inside XUL (because for the time
   // being GMPLoader relies upon NSPR, which we can't use in plugin-container
   // on Android), so we create it here inside XUL and pass it to the GMP code.
-  nsAutoPtr<GMPLoader> loader(CreateGMPLoader(nullptr));
-  GMPProcessChild::SetGMPLoader(loader);
+  UniquePtr<GMPLoader> loader = CreateGMPLoader(nullptr);
+  GMPProcessChild::SetGMPLoader(loader.get());
 #endif
 
 #if defined(XP_WIN)
@@ -345,6 +346,12 @@ XRE_InitChildProcess(int aArgc,
     if (_fileno(stdin) == -1 || _get_osfhandle(fileno(stdin)) == -1)
         freopen("CONIN$", "r", stdin);
   }
+
+#if defined(MOZ_SANDBOX)
+  if (aChildData->sandboxTargetServices) {
+    SandboxTarget::Instance()->SetTargetServices(aChildData->sandboxTargetServices);
+  }
+#endif
 #endif
 
   // NB: This must be called before profiler_init
@@ -628,7 +635,7 @@ XRE_InitChildProcess(int aArgc,
 #if defined(MOZ_SANDBOX) && defined(XP_WIN)
       // We need to do this after the process has been initialised, as
       // InitLoggingIfRequired may need access to prefs.
-      mozilla::sandboxing::InitLoggingIfRequired();
+      mozilla::sandboxing::InitLoggingIfRequired(aChildData->ProvideLogFunction);
 #endif
 
       OverrideDefaultLocaleIfNeeded();

xpcom/build/XREChildData.h

@@ -0,0 +1,51 @@
+/* -*- 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/. */
+
+#ifndef XREChildData_h
+#define XREChildData_h
+
+#include "mozilla/UniquePtr.h"
+
+#if defined(XP_WIN) && defined(MOZ_SANDBOX)
+#include "mozilla/sandboxing/loggingTypes.h"
+
+namespace sandbox {
+class TargetServices;
+}
+#endif
+
+namespace mozilla {
+namespace gmp {
+class GMPLoader;
+}
+}
+
+/**
+ * Data needed to start a child process.
+ */
+struct XREChildData
+{
+#if !defined(MOZ_WIDGET_ANDROID) && !defined(MOZ_WIDGET_GONK)
+  /**
+   * Used to load the GMP binary.
+   */
+  mozilla::UniquePtr<mozilla::gmp::GMPLoader> gmpLoader;
+#endif
+
+#if defined(XP_WIN) && defined(MOZ_SANDBOX)
+  /**
+   * Chromium sandbox TargetServices.
+   */
+  sandbox::TargetServices* sandboxTargetServices = nullptr;
+
+  /**
+   * Function to provide a logging function to the chromium sandbox code.
+   */
+  mozilla::sandboxing::ProvideLogFunctionCb ProvideLogFunction = nullptr;
+#endif
+};
+
+#endif // XREChildData_h

xpcom/build/moz.build

@@ -10,6 +10,7 @@ EXPORTS += [
     'nsXPCOMCIDInternal.h',
     'nsXREAppData.h',
     'nsXULAppAPI.h',
+    'XREChildData.h',
     'xrecore.h',
 ]
 

xpcom/build/nsXULAppAPI.h

@@ -19,6 +19,7 @@
 #include "mozilla/Assertions.h"
 #include "mozilla/Vector.h"
 #include "mozilla/TimeStamp.h"
+#include "XREChildData.h"
 
 /**
  * A directory service key which provides the platform-correct "application
@@ -411,7 +412,7 @@ class GMPLoader;
 XRE_API(nsresult,
         XRE_InitChildProcess, (int aArgc,
                                char* aArgv[],
-                               mozilla::gmp::GMPLoader* aGMPLoader))
+                               const XREChildData* aChildData))
 
 XRE_API(GeckoProcessType,
         XRE_GetProcessType, ())