Remove NakedThrowHelper and ifdef-out its callers (#9771)

This change removes NakedThrowHelper function for Unix since it was not used.
It also ifdefs out its upstream callers.

4 files changed, 15 insertions, 56 deletions

diff --git a/src/vm/amd64/unixstubs.cpp b/src/vm/amd64/unixstubs.cpp
index e7f49577e4..eba5cc2971 100644
--- a/src/vm/amd64/unixstubs.cpp
+++ b/src/vm/amd64/unixstubs.cpp
@@ -11,11 +11,6 @@ extern "C"
         PORTABILITY_ASSERT("Implement for PAL");
     }
 
-    void NakedThrowHelper()
-    {
-        PORTABILITY_ASSERT("Implement for PAL");
-    }
-
     void PInvokeStubForHost()
     {
         PORTABILITY_ASSERT("Implement for PAL");
diff --git a/src/vm/arm/ehhelpers.S b/src/vm/arm/ehhelpers.S
index 1c8b5c04c1..27f246c607 100644
--- a/src/vm/arm/ehhelpers.S
+++ b/src/vm/arm/ehhelpers.S
@@ -75,27 +75,6 @@ OFFSET_OF_FRAME=(4 + SIZEOF__GSCookie)
         .endm
 
 // ------------------------------------------------------------------
-//
-// Helpers for async (NullRef, AccessViolation) exceptions
-//
-
-        NESTED_ENTRY NakedThrowHelper2,_TEXT,UnhandledExceptionHandlerUnix
-        push         {r0, lr}
-
-        // On entry:
-        //
-        // R0 = Address of FaultingExceptionFrame
-        bl C_FUNC(LinkFrameAndThrow)
-
-        // Target should not return.
-        EMIT_BREAKPOINT
-
-        NESTED_END NakedThrowHelper2, _TEXT
-
-
-        GenerateRedirectedStubWithFrame NakedThrowHelper, NakedThrowHelper2
-
-// ------------------------------------------------------------------
 
         // This helper enables us to call into a funclet after applying the non-volatiles
         NESTED_ENTRY CallEHFunclet, _TEXT, NoHandler
diff --git a/src/vm/arm64/asmhelpers.S b/src/vm/arm64/asmhelpers.S
index 64ec15319c..b318ad9efa 100644
--- a/src/vm/arm64/asmhelpers.S
+++ b/src/vm/arm64/asmhelpers.S
@@ -1012,27 +1012,6 @@ NESTED_END CallEHFilterFunclet, _TEXT
 
 
 // ------------------------------------------------------------------
-//
-// Helpers for async (NullRef, AccessViolation) exceptions
-//
-
-NESTED_ENTRY NakedThrowHelper2, _TEXT ,UnhandledExceptionHandlerUnix
-    PROLOG_SAVE_REG_PAIR_INDEXED fp,lr, -16
-
-    // On entry:
-    //
-    // X0 = Address of FaultingExceptionFrame
-    bl C_FUNC(LinkFrameAndThrow)
-
-    // Target should not return.
-    EMIT_BREAKPOINT
-
-NESTED_END NakedThrowHelper2, _TEXT
-
-
-GenerateRedirectedStubWithFrame NakedThrowHelper, NakedThrowHelper2
-
-// ------------------------------------------------------------------
 // ResolveWorkerChainLookupAsmStub
 //
 // This method will perform a quick chained lookup of the entry if the
diff --git a/src/vm/excep.cpp b/src/vm/excep.cpp
index 6c427399c3..630d3f5f37 100644
--- a/src/vm/excep.cpp
+++ b/src/vm/excep.cpp
@@ -6969,6 +6969,8 @@ bool IsGcMarker(DWORD exceptionCode, CONTEXT *pContext)
     return false;
 }
 
+#ifndef FEATURE_PAL
+
 // Return true if the access violation is well formed (has two info parameters
 // at the end)
 static inline BOOL
@@ -7040,6 +7042,8 @@ IsDebuggerFault(EXCEPTION_RECORD *pExceptionRecord,
     return false;
 }
 
+#endif // FEATURE_PAL
+
 #ifdef WIN64EXCEPTIONS
 
 #ifndef _TARGET_X86_
@@ -7188,6 +7192,8 @@ AdjustContextForWriteBarrier(
 #endif // ELSE
 }
 
+#if defined(USE_FEF) && !defined(FEATURE_PAL)
+
 struct SavedExceptionInfo
 {
     EXCEPTION_RECORD m_ExceptionRecord;
@@ -7242,9 +7248,6 @@ struct SavedExceptionInfo
     }
 };
 
-
-#if defined(USE_FEF)
-
 SavedExceptionInfo g_SavedExceptionInfo;  // Globals are guaranteed zero-init;
 
 void InitSavedExceptionInfo()
@@ -7322,13 +7325,13 @@ void HandleManagedFault(EXCEPTION_RECORD*               pExceptionRecord,
     SetIP(pContext, GetEEFuncEntryPoint(NakedThrowHelper));
 }
 
-#else // USE_FEF
+#else // USE_FEF && !FEATURE_PAL
 
 void InitSavedExceptionInfo()
 {
 }
 
-#endif // USE_FEF
+#endif // USE_FEF && !FEATURE_PAL
 
 //
 // Init a new frame
@@ -7442,6 +7445,8 @@ bool ShouldHandleManagedFault(
     return true;
 }
 
+#ifndef FEATURE_PAL
+
 LONG WINAPI CLRVectoredExceptionHandlerPhase2(PEXCEPTION_POINTERS pExceptionInfo);
 
 enum VEH_ACTION
@@ -7877,7 +7882,6 @@ VEH_ACTION WINAPI CLRVectoredExceptionHandlerPhase3(PEXCEPTION_POINTERS pExcepti
             // Remember the EIP for stress debugging purposes. 
             g_LastAccessViolationEIP = (void*) ::GetIP(pContext);
 
-#ifndef FEATURE_PAL
             // Note: we have a holder, called AVInRuntimeImplOkayHolder, that tells us that its okay to have an
             // AV in the Runtime's implementation in certain places. So, if its okay to have an AV at this
             // time, then skip the check for whether or not the AV is in our impl.
@@ -7941,7 +7945,6 @@ VEH_ACTION WINAPI CLRVectoredExceptionHandlerPhase3(PEXCEPTION_POINTERS pExcepti
                     EEPOLICY_HANDLE_FATAL_ERROR_USING_EXCEPTION_INFO(COR_E_EXECUTIONENGINE, pExceptionInfo);
                 }
             }
-#endif // !FEATURE_PAL
         }
     }
     else if (exceptionCode == BOOTUP_EXCEPTION_COMPLUS)
@@ -7953,6 +7956,8 @@ VEH_ACTION WINAPI CLRVectoredExceptionHandlerPhase3(PEXCEPTION_POINTERS pExcepti
     return VEH_NO_ACTION;
 }
 
+#endif // !FEATURE_PAL
+
 BOOL IsIPInEE(void *ip)
 {
     WRAPPER_NO_CONTRACT;
@@ -8161,6 +8166,8 @@ public:
 
 #endif // defined(_TARGET_X86_)
 
+#ifndef FEATURE_PAL
+
 LONG WINAPI CLRVectoredExceptionHandlerShim(PEXCEPTION_POINTERS pExceptionInfo)
 {
     //
@@ -8308,7 +8315,6 @@ LONG WINAPI CLRVectoredExceptionHandlerShim(PEXCEPTION_POINTERS pExceptionInfo)
         }
 
 #ifdef _DEBUG
-#ifndef FEATURE_PAL
 #ifndef WIN64EXCEPTIONS
         {
             CantAllocHolder caHolder;
@@ -8373,7 +8379,6 @@ LONG WINAPI CLRVectoredExceptionHandlerShim(PEXCEPTION_POINTERS pExceptionInfo)
                 }
             }
         }
-#endif // !FEATURE_PAL
 #endif // _DEBUG
 
 #ifndef WIN64EXCEPTIONS
@@ -8390,6 +8395,7 @@ LONG WINAPI CLRVectoredExceptionHandlerShim(PEXCEPTION_POINTERS pExceptionInfo)
     return result;
 }
 
+#endif // !FEATURE_PAL
 
 // Contains the handle to the registered VEH
 static PVOID g_hVectoredExceptionHandler = NULL;