Backed out changeset 67acd8531789 (bug 1665486) for causing hazard bustages in FunctionBroker.h

CLOSED TREE

dom/plugins/ipc/FunctionBroker.cpp

@@ -275,7 +275,7 @@ static void GrantFileAccess(base::ProcessId aClientId, LPOPENFILENAME& aLpofn,
 
 template <>
 template <>
-BROKER_DISABLE_CFGUARD BOOL GetSaveFileNameWFB::RunFunction(
+BOOL GetSaveFileNameWFB::RunFunction(
     GetSaveFileNameWFB::FunctionType* aOrigFunction, base::ProcessId aClientId,
     LPOPENFILENAMEW& aLpofn) const {
   BOOL result = aOrigFunction(aLpofn);
@@ -299,7 +299,7 @@ typedef FileDlgFunctionBroker<ID_GetOpenFileNameW, decltype(GetOpenFileNameW)>
 
 template <>
 template <>
-BROKER_DISABLE_CFGUARD BOOL GetOpenFileNameWFB::RunFunction(
+BOOL GetOpenFileNameWFB::RunFunction(
     GetOpenFileNameWFB::FunctionType* aOrigFunction, base::ProcessId aClientId,
     LPOPENFILENAMEW& aLpofn) const {
   BOOL result = aOrigFunction(aLpofn);
@@ -1332,9 +1332,10 @@ struct CMWReqInfo::ShouldMarshal<2> {
 
 template <>
 template <>
-BROKER_DISABLE_CFGUARD HANDLE CreateMutexWFB::RunFunction(
-    CreateMutexWFB::FunctionType* aOrigFunction, base::ProcessId aClientId,
-    LPSECURITY_ATTRIBUTES& aAttribs, BOOL& aOwner, LPCWSTR& aName) const {
+HANDLE CreateMutexWFB::RunFunction(CreateMutexWFB::FunctionType* aOrigFunction,
+                                   base::ProcessId aClientId,
+                                   LPSECURITY_ATTRIBUTES& aAttribs,
+                                   BOOL& aOwner, LPCWSTR& aName) const {
   // Use CreateMutexW to get the camera mutex and DuplicateHandle to open it
   // for use in the child process.
   // Recall that aAttribs, aOwner and aName are all unmarshaled so they are

dom/plugins/ipc/FunctionBroker.h

@@ -153,16 +153,6 @@
  *
  */
 
-#if defined(XP_WIN) && defined(__clang__) && __has_declspec_attribute(guard)
-// Workaround for https://bugs.llvm.org/show_bug.cgi?id=47617
-// Some of the brokered function thunks don't get properly marked as call
-// targets, so we have to disable CFG when returning to the original function.
-// Unlike `INTERCEPTOR_DISABLE_CFGUARD`, this happens in 64-bit builds too.
-#  define BROKER_DISABLE_CFGUARD __declspec(guard(nocf))
-#else
-#  define BROKER_DISABLE_CFGUARD /* nothing */
-#endif
-
 namespace mozilla {
 namespace plugins {
 
@@ -1246,8 +1236,7 @@ class FunctionBroker<functionId, ResultType HOOK_CALL(ParamTypes...),
   };
 
   template <typename... VarParams>
-  BROKER_DISABLE_CFGUARD ResultType RunFunction(FunctionType* aFunction,
-                                                base::ProcessId aClientId,
+  ResultType RunFunction(FunctionType* aFunction, base::ProcessId aClientId,
                          VarParams&... aParams) const {
     return aFunction(aParams...);
   };