[netcore] Correctly send exit code to the caller

Commit migrated from mono/mono@8da9eeb

src/mono/mono/mini/main-core.c

@@ -6,6 +6,7 @@
 #include "mini-runtime.h"
 #include <mono/metadata/assembly.h>
 #include <mono/metadata/assembly-internals.h>
+#include <mono/metadata/environment.h>
 #include <mono/metadata/loader-internals.h>
 #include <mono/utils/mono-logger-internals.h>
 
@@ -281,6 +282,8 @@ int STDAPICALLTYPE coreclr_execute_assembly (void* hostHandle, unsigned int doma
 	*ptr = NULL;
 
 	mono_parse_env_options (&mono_argc, &mono_argv);
+
+	// TODO: Should be return code of Main only (mono_jit_exec result)
 	*exitCode = mono_main (mono_argc, mono_argv);
 
 	return 0;
@@ -292,6 +295,7 @@ int STDAPICALLTYPE coreclr_execute_assembly (void* hostHandle, unsigned int doma
 // Parameters:
 //  hostHandle              - Handle of the host
 //  domainId                - Id of the domain 
+//  latchedExitCode         - Latched exit code after domain unloaded
 //
 // Returns:
 //  HRESULT indicating status of the operation. S_OK if the assembly was successfully executed
@@ -307,6 +311,8 @@ int STDAPICALLTYPE coreclr_shutdown_2 (void* hostHandle, unsigned int domainId,
 	trusted_platform_assemblies = NULL;
 	mono_core_trusted_platform_assemblies_free (a);
 
+	*latchedExitCode = mono_environment_exitcode_get ();
+
 	return 0;
 }