Merge in 'release/7.0' changes

Author: dotnet-bot

src/coreclr/dlls/mscoree/exports.cpp

@@ -23,6 +23,25 @@
 
 #define ASSERTE_ALL_BUILDS(expr) _ASSERTE_ALL_BUILDS((expr))
 
+#ifdef TARGET_UNIX
+#define NO_HOSTING_API_RETURN_ADDRESS ((void*)ULONG_PTR_MAX)
+void* g_hostingApiReturnAddress = NO_HOSTING_API_RETURN_ADDRESS;
+
+class HostingApiFrameHolder
+{
+public:
+    HostingApiFrameHolder(void* returnAddress)
+    {
+        g_hostingApiReturnAddress = returnAddress;
+    }
+
+    ~HostingApiFrameHolder()
+    {
+        g_hostingApiReturnAddress = NO_HOSTING_API_RETURN_ADDRESS;
+    }
+};
+#endif // TARGET_UNIX
+
 // Holder for const wide strings
 typedef NewArrayHolder<const WCHAR> ConstWStringHolder;
 
@@ -194,6 +213,7 @@ extern "C" int coreclr_create_delegate(void*, unsigned int, const char*, const c
 //  HRESULT indicating status of the operation. S_OK if the assembly was successfully executed
 //
 extern "C"
+NOINLINE
 DLLEXPORT
 int coreclr_initialize(
             const char* exePath,
@@ -212,6 +232,10 @@ int coreclr_initialize(
     bool hostPolicyEmbedded = false;
     PInvokeOverrideFn* pinvokeOverride = nullptr;
 
+#ifdef TARGET_UNIX
+    HostingApiFrameHolder apiFrameHolder(_ReturnAddress());
+#endif
+
     ConvertConfigPropertiesToUnicode(
         propertyKeys,
         propertyValues,
@@ -420,6 +444,7 @@ int coreclr_create_delegate(
 //  HRESULT indicating status of the operation. S_OK if the assembly was successfully executed
 //
 extern "C"
+NOINLINE
 DLLEXPORT
 int coreclr_execute_assembly(
             void* hostHandle,
@@ -435,6 +460,10 @@ int coreclr_execute_assembly(
     }
     *exitCode = -1;
 
+#ifdef TARGET_UNIX
+    HostingApiFrameHolder apiFrameHolder(_ReturnAddress());
+#endif
+
     ICLRRuntimeHost4* host = reinterpret_cast<ICLRRuntimeHost4*>(hostHandle);
 
     ConstWStringArrayHolder argvW;

src/coreclr/vm/exceptionhandling.cpp

@@ -4523,6 +4523,8 @@ VOID UnwindManagedExceptionPass2(PAL_SEHException& ex, CONTEXT* unwindStartConte
     EEPOLICY_HANDLE_FATAL_ERROR(COR_E_EXECUTIONENGINE);
 }
 
+extern void* g_hostingApiReturnAddress;
+
 //---------------------------------------------------------------------------------------
 //
 // This functions performs dispatching of a managed exception.
@@ -4724,7 +4726,8 @@ VOID DECLSPEC_NORETURN UnwindManagedExceptionPass1(PAL_SEHException& ex, CONTEXT
 
             STRESS_LOG2(LF_EH, LL_INFO100, "Processing exception at native frame: IP = %p, SP = %p \n", controlPc, sp);
 
-            if (controlPc == 0)
+            // Consider the exception unhandled if the unwinding cannot proceed further or if it went past the coreclr_initialize or coreclr_execute_assembly
+            if ((controlPc == 0) || (controlPc == (UINT_PTR)g_hostingApiReturnAddress))
             {
                 if (!GetThread()->HasThreadStateNC(Thread::TSNC_ProcessedUnhandledException))
                 {

src/coreclr/vm/stackwalk.cpp

@@ -709,6 +709,8 @@ PCODE Thread::VirtualUnwindNonLeafCallFrame(T_CONTEXT* pContext, KNONVOLATILE_CO
     return uControlPc;
 }
 
+extern void* g_hostingApiReturnAddress;
+
 // static
 UINT_PTR Thread::VirtualUnwindToFirstManagedCallFrame(T_CONTEXT* pContext)
 {
@@ -751,8 +753,9 @@ UINT_PTR Thread::VirtualUnwindToFirstManagedCallFrame(T_CONTEXT* pContext)
 
         uControlPc = GetIP(pContext);
 
-        if (uControlPc == 0)
+        if ((uControlPc == 0) || (uControlPc == (PCODE)g_hostingApiReturnAddress))
         {
+            uControlPc = 0;
             break;
         }
 #endif // !TARGET_UNIX