Extend the Unix hosting API

This change modifies the Unix hosting API so that the hosting app can create
as many managed delegates as it needs and execute them as many times it wants.
The new API contains separate functions to initialize and shutdown CoreCLR
and a function to create a delegate.
The current ExecuteAssembly function behavior stays unmodified for now to
ensure that dnx that uses that API and that pulls the binary libcoreclr
is not broken.
After the dnx is updated to use the new coreclr_create_delegate API, I'll remove
the ExecuteAssembly.

Also done:
1) Added support for comments and skipping empty lines in the mscorwks_unixexports.src.
2) Restructured the mscorwks_unixexports.src
3) Added coreclr_execute_assembly to the unixinterface.cpp / exports
4) Modified coreruncommon.cpp to use the new hosting API

CMakeLists.txt

@@ -121,7 +121,7 @@ function(generate_exports_file inputFilename outputFilename)
   add_custom_command(
     OUTPUT ${outputFilename}
     COMMAND ${AWK} -f ${CMAKE_SOURCE_DIR}/${AWK_SCRIPT} ${inputFilename} >${outputFilename}
-    DEPENDS ${inputFilename}
+    DEPENDS ${inputFilename} ${CMAKE_SOURCE_DIR}/${AWK_SCRIPT}
     COMMENT "Generating exports file ${outputFilename}"
   )
   set_source_files_properties(${outputFilename}

generateexportedsymbols.awk

@@ -2,5 +2,10 @@
 	# Remove the CR character in case the sources are mapped from
 	# a Windows share and contain CRLF line endings
 	gsub(/\r/,"", $0);
-	print "_"  $0;
+
+	# Skip empty lines and comment lines starting with semicolon
+	if (NF && !match($0, /^[:space:]*;/))
+	{
+		print "_"  $0;
+	}
 } 

generateversionscript.awk

@@ -6,7 +6,12 @@ BEGIN {
 	# Remove the CR character in case the sources are mapped from
 	# a Windows share and contain CRLF line endings
 	gsub(/\r/,"", $0);
-	print "        "  $0 ";";
+
+	# Skip empty lines and comment lines starting with semicolon
+	if (NF && !match($0, /^[:space:]*;/))
+	{
+		print "        "  $0 ";";
+	}
 } 
 END {
 	print "    local: *;"

src/coreclr/hosts/unixcoreruncommon/coreruncommon.cpp

@@ -24,29 +24,31 @@ static const char * const coreClrDll = "libcoreclr.dylib";
 static const char * const coreClrDll = "libcoreclr.so";
 #endif
 
-// Windows types used by the ExecuteAssembly function
-typedef unsigned int DWORD;
-typedef const char16_t* LPCWSTR;
-typedef const char* LPCSTR;
-typedef int32_t HRESULT;
-
-#define SUCCEEDED(Status) ((HRESULT)(Status) >= 0)
-
-// Prototype of the ExecuteAssembly function from the libcoreclr.do
-typedef HRESULT (*ExecuteAssemblyFunction)(
-                    LPCSTR exePath,
-                    LPCSTR coreClrPath,
-                    LPCSTR appDomainFriendlyName,
-                    int propertyCount,
-                    LPCSTR* propertyKeys,
-                    LPCSTR* propertyValues,
-                    int argc,
-                    LPCSTR* argv,
-                    LPCSTR managedAssemblyPath,
-                    LPCSTR entryPointAssemblyName,
-                    LPCSTR entryPointTypeName,
-                    LPCSTR entryPointMethodsName,
-                    DWORD* exitCode);
+#define SUCCEEDED(Status) ((Status) >= 0)
+
+// Prototype of the coreclr_initialize function from the libcoreclr.so
+typedef int (*InitializeCoreCLRFunction)(
+            const char* exePath,
+            const char* appDomainFriendlyName,
+            int propertyCount,
+            const char** propertyKeys,
+            const char** propertyValues,
+            void** hostHandle,
+            unsigned int* domainId);
+
+// Prototype of the coreclr_shutdown function from the libcoreclr.so
+typedef int (*ShutdownCoreCLRFunction)(
+            void* hostHandle,
+            unsigned int domainId);
+
+// Prototype of the coreclr_execute_assembly function from the libcoreclr.so
+typedef int (*ExecuteAssemblyFunction)(
+            void* hostHandle,
+            unsigned int domainId,
+            int argc,
+            const char** argv,
+            const char* managedAssemblyPath,
+            unsigned int* exitCode);
 
 bool GetAbsolutePath(const char* path, std::string& absolutePath)
 {
@@ -233,8 +235,23 @@ int ExecuteManagedAssembly(
     void* coreclrLib = dlopen(coreClrDllPath.c_str(), RTLD_NOW | RTLD_LOCAL);
     if (coreclrLib != nullptr)
     {
-        ExecuteAssemblyFunction executeAssembly = (ExecuteAssemblyFunction)dlsym(coreclrLib, "ExecuteAssembly");
-        if (executeAssembly != nullptr)
+        InitializeCoreCLRFunction initializeCoreCLR = (InitializeCoreCLRFunction)dlsym(coreclrLib, "coreclr_initialize");
+        ExecuteAssemblyFunction executeAssembly = (ExecuteAssemblyFunction)dlsym(coreclrLib, "coreclr_execute_assembly");
+        ShutdownCoreCLRFunction shutdownCoreCLR = (ShutdownCoreCLRFunction)dlsym(coreclrLib, "coreclr_shutdown");
+
+        if (initializeCoreCLR == nullptr)
+        {
+            fprintf(stderr, "Function coreclr_initialize not found in the libcoreclr.so\n");
+        }
+        else if (executeAssembly == nullptr)
+        {
+            fprintf(stderr, "Function coreclr_execute_assembly not found in the libcoreclr.so\n");
+        }
+        else if (shutdownCoreCLR == nullptr)
+        {
+            fprintf(stderr, "Function coreclr_shutdown not found in the libcoreclr.so\n");
+        }
+        else
         {
             // Allowed property names:
             // APPBASE
@@ -272,30 +289,46 @@ int ExecuteManagedAssembly(
                 "UseLatestBehaviorWhenTFMNotSpecified"
             };
 
-            HRESULT st = executeAssembly(
-                            currentExeAbsolutePath,
-                            coreClrDllPath.c_str(),
-                            "unixcorerun",
-                            sizeof(propertyKeys) / sizeof(propertyKeys[0]),
-                            propertyKeys,
-                            propertyValues,
-                            managedAssemblyArgc,
-                            managedAssemblyArgv,
-                            managedAssemblyAbsolutePath,
-                            NULL,
-                            NULL,
-                            NULL,
-                            (DWORD*)&exitCode);
+            void* hostHandle;
+            unsigned int domainId;
+
+            int st = initializeCoreCLR(
+                        currentExeAbsolutePath, 
+                        "unixcorerun", 
+                        sizeof(propertyKeys) / sizeof(propertyKeys[0]), 
+                        propertyKeys, 
+                        propertyValues, 
+                        &hostHandle, 
+                        &domainId);
 
             if (!SUCCEEDED(st))
             {
-                fprintf(stderr, "ExecuteAssembly failed - status: 0x%08x\n", st);
+                fprintf(stderr, "coreclr_initialize failed - status: 0x%08x\n", st);
                 exitCode = -1;
             }
-        }
-        else
-        {
-            fprintf(stderr, "Function ExecuteAssembly not found in the libcoreclr.so\n");
+            else 
+            {
+                st = executeAssembly(
+                        hostHandle,
+                        domainId,
+                        managedAssemblyArgc,
+                        managedAssemblyArgv,
+                        managedAssemblyAbsolutePath,
+                        (unsigned int*)&exitCode);
+
+                if (!SUCCEEDED(st))
+                {
+                    fprintf(stderr, "coreclr_execute_assembly failed - status: 0x%08x\n", st);
+                    exitCode = -1;
+                }
+
+                st = shutdownCoreCLR(hostHandle, domainId);
+                if (!SUCCEEDED(st))
+                {
+                    fprintf(stderr, "coreclr_shutdown failed - status: 0x%08x\n", st);
+                    exitCode = -1;
+                }
+            }
         }
 
         if (dlclose(coreclrLib) != 0)

src/dlls/mscoree/mscorwks_unixexports.src

@@ -1,7 +1,30 @@
+; Unix hosting API
+coreclr_create_delegate
+coreclr_execute_assembly
+coreclr_initialize
+coreclr_shutdown
+
+; Obsolete Unix hosting API, to be removed
+ExecuteAssembly
+
+; PAL initialization and module registration
+PAL_InitializeCoreCLR 
+PAL_RegisterModule
+PAL_UnregisterModule
+
+; Functions exported by the coreclr
+CoreDllMain
+DllMain
+GetCLRRuntimeHost
+
+; Functions used by CoreFX
+EnsureOpenSslInitialized
+ForkAndExecProcess
+
+; Win32 API and other PAL functions used by the mscorlib
 CloseHandle
 CoCreateGuid
 CopyFileW
-CoreDllMain
 CoTaskMemAlloc
 CoTaskMemFree
 CreateDirectoryW
@@ -10,19 +33,14 @@ CreateFileW
 CreateMutexW
 CreateSemaphoreW
 DeleteFileW
-DllMain
 DuplicateHandle
-EnsureOpenSslInitialized
-ExecuteAssembly
 FindClose
 FindFirstFileW
 FindNextFileW
 FlushFileBuffers
-ForkAndExecProcess
 FormatMessageW
 FreeEnvironmentStringsW
 GetACP
-GetCLRRuntimeHost
 GetConsoleCP
 GetConsoleOutputCP
 GetCurrentDirectoryW
@@ -53,10 +71,7 @@ MultiByteToWideChar
 OpenEventW
 OpenMutexW
 OpenSemaphoreW
-PAL_InitializeCoreCLR 
 PAL_Random
-PAL_RegisterModule
-PAL_UnregisterModule
 QueryPerformanceCounter  
 QueryPerformanceFrequency
 RaiseException