/
cominterop.c
3256 lines (2714 loc) · 92.9 KB
/
cominterop.c
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/*
* cominterop.c: COM Interop Support
*
*
* (C) 2002 Ximian, Inc. http://www.ximian.com
*
*/
#include "config.h"
#ifdef HAVE_ALLOCA_H
#include <alloca.h>
#endif
#include "object.h"
#include "loader.h"
#include "cil-coff.h"
#include "metadata/cominterop.h"
#include "metadata/marshal.h"
#include "metadata/method-builder.h"
#include "metadata/tabledefs.h"
#include "metadata/exception.h"
#include "metadata/appdomain.h"
#include "mono/metadata/debug-helpers.h"
#include "mono/metadata/threadpool.h"
#include "mono/metadata/threads.h"
#include "mono/metadata/monitor.h"
#include "mono/metadata/metadata-internals.h"
#include "mono/metadata/domain-internals.h"
#include "mono/metadata/gc-internal.h"
#include "mono/metadata/threads-types.h"
#include "mono/metadata/string-icalls.h"
#include "mono/metadata/attrdefs.h"
#include "mono/metadata/gc-internal.h"
#include "mono/utils/mono-counters.h"
#include <string.h>
#include <errno.h>
#ifndef DISABLE_COM
#define OPDEF(a,b,c,d,e,f,g,h,i,j) \
a = i,
typedef enum {
MONO_MARSHAL_NONE, /* No marshalling needed */
MONO_MARSHAL_COPY, /* Can be copied by value to the new domain */
MONO_MARSHAL_COPY_OUT, /* out parameter that needs to be copied back to the original instance */
MONO_MARSHAL_SERIALIZE /* Value needs to be serialized into the new domain */
} MonoXDomainMarshalType;
typedef enum {
MONO_COM_DEFAULT,
MONO_COM_MS
} MonoCOMProvider;
static MonoCOMProvider com_provider = MONO_COM_DEFAULT;
enum {
#include "mono/cil/opcode.def"
LAST = 0xff
};
#undef OPDEF
/* This mutex protects the various cominterop related caches in MonoImage */
#define mono_cominterop_lock() EnterCriticalSection (&cominterop_mutex)
#define mono_cominterop_unlock() LeaveCriticalSection (&cominterop_mutex)
static CRITICAL_SECTION cominterop_mutex;
/* STDCALL on windows, CDECL everywhere else to work with XPCOM and MainWin COM */
#ifdef HOST_WIN32
#define STDCALL __stdcall
#else
#define STDCALL
#endif
/* Upon creation of a CCW, only allocate a weak handle and set the
* reference count to 0. If the unmanaged client code decides to addref and
* hold onto the CCW, I then allocate a strong handle. Once the reference count
* goes back to 0, convert back to a weak handle.
*/
typedef struct {
guint32 ref_count;
guint32 gc_handle;
GHashTable* vtable_hash;
#ifdef HOST_WIN32
gpointer free_marshaler;
#endif
} MonoCCW;
/* This type is the actual pointer passed to unmanaged code
* to represent a COM interface.
*/
typedef struct {
gpointer vtable;
MonoCCW* ccw;
} MonoCCWInterface;
/* IUnknown */
static int STDCALL cominterop_ccw_addref (MonoCCWInterface* ccwe);
static int STDCALL cominterop_ccw_release (MonoCCWInterface* ccwe);
static int STDCALL cominterop_ccw_queryinterface (MonoCCWInterface* ccwe, guint8* riid, gpointer* ppv);
/* IDispatch */
static int STDCALL cominterop_ccw_get_type_info_count (MonoCCWInterface* ccwe, guint32 *pctinfo);
static int STDCALL cominterop_ccw_get_type_info (MonoCCWInterface* ccwe, guint32 iTInfo, guint32 lcid, gpointer *ppTInfo);
static int STDCALL cominterop_ccw_get_ids_of_names (MonoCCWInterface* ccwe, gpointer riid,
gunichar2** rgszNames, guint32 cNames,
guint32 lcid, gint32 *rgDispId);
static int STDCALL cominterop_ccw_invoke (MonoCCWInterface* ccwe, guint32 dispIdMember,
gpointer riid, guint32 lcid,
guint16 wFlags, gpointer pDispParams,
gpointer pVarResult, gpointer pExcepInfo,
guint32 *puArgErr);
static MonoMethod *
cominterop_get_managed_wrapper_adjusted (MonoMethod *method);
static gpointer
cominterop_get_ccw (MonoObject* object, MonoClass* itf);
static MonoObject*
cominterop_get_ccw_object (MonoCCWInterface* ccw_entry, gboolean verify);
/* SAFEARRAY marshalling */
static gboolean
mono_marshal_safearray_begin (gpointer safearray, MonoArray **result, gpointer *indices, gpointer empty, gpointer parameter, gboolean allocateNewArray);
static gpointer
mono_marshal_safearray_get_value (gpointer safearray, gpointer indices);
static gboolean
mono_marshal_safearray_next (gpointer safearray, gpointer indices);
static void
mono_marshal_safearray_end (gpointer safearray, gpointer indices);
static gboolean
mono_marshal_safearray_create (MonoArray *input, gpointer *newsafearray, gpointer *indices, gpointer empty);
static void
mono_marshal_safearray_set_value (gpointer safearray, gpointer indices, gpointer value);
static void
mono_marshal_safearray_free_indices (gpointer indices);
/**
* cominterop_method_signature:
* @method: a method
*
* Returns: the corresponding unmanaged method signature for a managed COM
* method.
*/
static MonoMethodSignature*
cominterop_method_signature (MonoMethod* method)
{
MonoMethodSignature *res;
MonoImage *image = method->klass->image;
MonoMethodSignature *sig = mono_method_signature (method);
gboolean preserve_sig = method->iflags & METHOD_IMPL_ATTRIBUTE_PRESERVE_SIG;
int sigsize;
int i;
int param_count = sig->param_count + 1; // convert this arg into IntPtr arg
if (!preserve_sig &&!MONO_TYPE_IS_VOID (sig->ret))
param_count++;
res = mono_metadata_signature_alloc (image, param_count);
sigsize = MONO_SIZEOF_METHOD_SIGNATURE + sig->param_count * sizeof (MonoType *);
memcpy (res, sig, sigsize);
// now move args forward one
for (i = sig->param_count-1; i >= 0; i--)
res->params[i+1] = sig->params[i];
// first arg is interface pointer
res->params[0] = &mono_defaults.int_class->byval_arg;
if (preserve_sig) {
res->ret = sig->ret;
}
else {
// last arg is return type
if (!MONO_TYPE_IS_VOID (sig->ret)) {
res->params[param_count-1] = mono_metadata_type_dup (image, sig->ret);
res->params[param_count-1]->byref = 1;
res->params[param_count-1]->attrs = PARAM_ATTRIBUTE_OUT;
}
// return type is always int32 (HRESULT)
res->ret = &mono_defaults.int32_class->byval_arg;
}
// no pinvoke
res->pinvoke = FALSE;
// no hasthis
res->hasthis = 0;
// set param_count
res->param_count = param_count;
// STDCALL on windows, CDECL everywhere else to work with XPCOM and MainWin COM
#ifdef HOST_WIN32
res->call_convention = MONO_CALL_STDCALL;
#else
res->call_convention = MONO_CALL_C;
#endif
return res;
}
/**
* cominterop_get_function_pointer:
* @itf: a pointer to the COM interface
* @slot: the vtable slot of the method pointer to return
*
* Returns: the unmanaged vtable function pointer from the interface
*/
static gpointer
cominterop_get_function_pointer (gpointer itf, int slot)
{
gpointer func;
func = *((*(gpointer**)itf)+slot);
return func;
}
/**
* cominterop_object_is_com_object:
* @obj: a pointer to the object
*
* Returns: a value indicating if the object is a
* Runtime Callable Wrapper (RCW) for a COM object
*/
static gboolean
cominterop_object_is_rcw (MonoObject *obj)
{
MonoClass *klass = NULL;
MonoRealProxy* real_proxy = NULL;
if (!obj)
return FALSE;
klass = mono_object_class (obj);
if (klass != mono_defaults.transparent_proxy_class)
return FALSE;
real_proxy = ((MonoTransparentProxy*)obj)->rp;
if (!real_proxy)
return FALSE;
klass = mono_object_class (real_proxy);
return (klass && klass == mono_defaults.com_interop_proxy_class);
}
static int
cominterop_get_com_slot_begin (MonoClass* klass)
{
static MonoClass *interface_type_attribute = NULL;
MonoCustomAttrInfo *cinfo = NULL;
MonoInterfaceTypeAttribute* itf_attr = NULL;
if (!interface_type_attribute)
interface_type_attribute = mono_class_from_name (mono_defaults.corlib, "System.Runtime.InteropServices", "InterfaceTypeAttribute");
cinfo = mono_custom_attrs_from_class (klass);
if (cinfo) {
itf_attr = (MonoInterfaceTypeAttribute*)mono_custom_attrs_get_attr (cinfo, interface_type_attribute);
if (!cinfo->cached)
mono_custom_attrs_free (cinfo);
}
if (itf_attr && itf_attr->intType == 1)
return 3; /* 3 methods in IUnknown*/
else
return 7; /* 7 methods in IDispatch*/
}
/**
* cominterop_get_method_interface:
* @method: method being called
*
* Returns: the MonoClass* representing the interface on which
* the method is defined.
*/
static MonoClass*
cominterop_get_method_interface (MonoMethod* method)
{
MonoError error;
MonoClass *ic = method->klass;
/* if method is on a class, we need to look up interface method exists on */
if (!MONO_CLASS_IS_INTERFACE(method->klass)) {
GPtrArray *ifaces = mono_class_get_implemented_interfaces (method->klass, &error);
g_assert (mono_error_ok (&error));
if (ifaces) {
int i;
mono_class_setup_vtable (method->klass);
for (i = 0; i < ifaces->len; ++i) {
int j, offset;
gboolean found = FALSE;
ic = g_ptr_array_index (ifaces, i);
offset = mono_class_interface_offset (method->klass, ic);
for (j = 0; j < ic->method.count; ++j) {
if (method->klass->vtable [j + offset] == method) {
found = TRUE;
break;
}
}
if (found)
break;
ic = NULL;
}
g_ptr_array_free (ifaces, TRUE);
}
}
if (!ic)
g_assert (ic);
g_assert (MONO_CLASS_IS_INTERFACE (ic));
return ic;
}
/**
* cominterop_get_com_slot_for_method:
* @method: a method
*
* Returns: the method's slot in the COM interface vtable
*/
static int
cominterop_get_com_slot_for_method (MonoMethod* method)
{
guint32 slot = method->slot;
MonoClass *ic = method->klass;
/* if method is on a class, we need to look up interface method exists on */
if (!MONO_CLASS_IS_INTERFACE(ic)) {
int offset = 0;
int i = 0;
ic = cominterop_get_method_interface (method);
offset = mono_class_interface_offset (method->klass, ic);
g_assert(offset >= 0);
for(i = 0; i < ic->method.count; ++i) {
if (method->klass->vtable [i + offset] == method)
{
slot = ic->methods[i]->slot;
break;
}
}
}
g_assert (ic);
g_assert (MONO_CLASS_IS_INTERFACE (ic));
return slot + cominterop_get_com_slot_begin (ic);
}
static void
cominterop_mono_string_to_guid (MonoString* string, guint8 *guid);
static gboolean
cominterop_class_guid (MonoClass* klass, guint8* guid)
{
static MonoClass *GuidAttribute = NULL;
MonoCustomAttrInfo *cinfo;
/* Handle the GuidAttribute */
if (!GuidAttribute)
GuidAttribute = mono_class_from_name (mono_defaults.corlib, "System.Runtime.InteropServices", "GuidAttribute");
cinfo = mono_custom_attrs_from_class (klass);
if (cinfo) {
MonoReflectionGuidAttribute *attr = (MonoReflectionGuidAttribute*)mono_custom_attrs_get_attr (cinfo, GuidAttribute);
if (!attr)
return FALSE;
if (!cinfo->cached)
mono_custom_attrs_free (cinfo);
cominterop_mono_string_to_guid (attr->guid, guid);
return TRUE;
}
return FALSE;
}
static gboolean
cominterop_com_visible (MonoClass* klass)
{
static MonoClass *ComVisibleAttribute = NULL;
MonoError error;
MonoCustomAttrInfo *cinfo;
GPtrArray *ifaces;
MonoBoolean visible = 1;
/* Handle the ComVisibleAttribute */
if (!ComVisibleAttribute)
ComVisibleAttribute = mono_class_from_name (mono_defaults.corlib, "System.Runtime.InteropServices", "ComVisibleAttribute");
cinfo = mono_custom_attrs_from_class (klass);
if (cinfo) {
MonoReflectionComVisibleAttribute *attr = (MonoReflectionComVisibleAttribute*)mono_custom_attrs_get_attr (cinfo, ComVisibleAttribute);
if (attr)
visible = attr->visible;
if (!cinfo->cached)
mono_custom_attrs_free (cinfo);
if (visible)
return TRUE;
}
ifaces = mono_class_get_implemented_interfaces (klass, &error);
g_assert (mono_error_ok (&error));
if (ifaces) {
int i;
for (i = 0; i < ifaces->len; ++i) {
MonoClass *ic = NULL;
ic = g_ptr_array_index (ifaces, i);
if (MONO_CLASS_IS_IMPORT (ic))
visible = TRUE;
}
g_ptr_array_free (ifaces, TRUE);
}
return visible;
}
static void cominterop_raise_hr_exception (int hr)
{
static MonoMethod* throw_exception_for_hr = NULL;
MonoException* ex;
void* params[1] = {&hr};
if (!throw_exception_for_hr)
throw_exception_for_hr = mono_class_get_method_from_name (mono_defaults.marshal_class, "GetExceptionForHR", 1);
ex = (MonoException*)mono_runtime_invoke (throw_exception_for_hr, NULL, params, NULL);
mono_raise_exception (ex);
}
/**
* cominterop_get_interface:
* @obj: managed wrapper object containing COM object
* @ic: interface type to retrieve for COM object
*
* Returns: the COM interface requested
*/
static gpointer
cominterop_get_interface (MonoComObject* obj, MonoClass* ic, gboolean throw_exception)
{
gpointer itf = NULL;
g_assert (ic);
g_assert (MONO_CLASS_IS_INTERFACE (ic));
mono_cominterop_lock ();
if (obj->itf_hash)
itf = g_hash_table_lookup (obj->itf_hash, GUINT_TO_POINTER ((guint)ic->interface_id));
mono_cominterop_unlock ();
if (!itf) {
guint8 iid [16];
int found = cominterop_class_guid (ic, iid);
int hr;
g_assert(found);
hr = ves_icall_System_Runtime_InteropServices_Marshal_QueryInterfaceInternal (obj->iunknown, iid, &itf);
if (hr < 0 && throw_exception) {
cominterop_raise_hr_exception (hr);
}
if (hr >= 0 && itf) {
mono_cominterop_lock ();
if (!obj->itf_hash)
obj->itf_hash = g_hash_table_new (mono_aligned_addr_hash, NULL);
g_hash_table_insert (obj->itf_hash, GUINT_TO_POINTER ((guint)ic->interface_id), itf);
mono_cominterop_unlock ();
}
}
if (throw_exception)
g_assert (itf);
return itf;
}
static int
cominterop_get_hresult_for_exception (MonoException* exc)
{
int hr = 0;
return hr;
}
static MonoReflectionType *
cominterop_type_from_handle (MonoType *handle)
{
MonoDomain *domain = mono_domain_get ();
MonoClass *klass = mono_class_from_mono_type (handle);
MONO_ARCH_SAVE_REGS;
mono_class_init (klass);
return mono_type_get_object (domain, handle);
}
static void
register_icall (gpointer func, const char *name, const char *sigstr, gboolean save)
{
MonoMethodSignature *sig = mono_create_icall_signature (sigstr);
mono_register_jit_icall (func, name, sig, save);
}
void
mono_cominterop_init (void)
{
char* com_provider_env = NULL;
InitializeCriticalSection (&cominterop_mutex);
com_provider_env = getenv ("MONO_COM");
if (com_provider_env && !strcmp(com_provider_env, "MS"))
com_provider = MONO_COM_MS;
register_icall (cominterop_get_method_interface, "cominterop_get_method_interface", "ptr ptr", FALSE);
register_icall (cominterop_get_function_pointer, "cominterop_get_function_pointer", "ptr ptr int32", FALSE);
register_icall (cominterop_object_is_rcw, "cominterop_object_is_rcw", "int32 object", FALSE);
register_icall (cominterop_get_ccw, "cominterop_get_ccw", "ptr object ptr", FALSE);
register_icall (cominterop_get_ccw_object, "cominterop_get_ccw_object", "object ptr int32", FALSE);
register_icall (cominterop_get_hresult_for_exception, "cominterop_get_hresult_for_exception", "int32 object", FALSE);
register_icall (cominterop_get_interface, "cominterop_get_interface", "ptr object ptr int32", FALSE);
register_icall (mono_string_to_bstr, "mono_string_to_bstr", "ptr obj", FALSE);
register_icall (mono_string_from_bstr, "mono_string_from_bstr", "obj ptr", FALSE);
register_icall (mono_free_bstr, "mono_free_bstr", "void ptr", FALSE);
register_icall (cominterop_type_from_handle, "cominterop_type_from_handle", "object ptr", FALSE);
/* SAFEARRAY marshalling */
register_icall (mono_marshal_safearray_begin, "mono_marshal_safearray_begin", "int32 ptr ptr ptr ptr ptr int32", FALSE);
register_icall (mono_marshal_safearray_get_value, "mono_marshal_safearray_get_value", "ptr ptr ptr", FALSE);
register_icall (mono_marshal_safearray_next, "mono_marshal_safearray_next", "int32 ptr ptr", FALSE);
register_icall (mono_marshal_safearray_end, "mono_marshal_safearray_end", "void ptr ptr", FALSE);
register_icall (mono_marshal_safearray_create, "mono_marshal_safearray_create", "int32 object ptr ptr ptr", FALSE);
register_icall (mono_marshal_safearray_set_value, "mono_marshal_safearray_set_value", "void ptr ptr ptr", FALSE);
register_icall (mono_marshal_safearray_free_indices, "mono_marshal_safearray_free_indices", "void ptr", FALSE);
}
void
mono_cominterop_cleanup (void)
{
DeleteCriticalSection (&cominterop_mutex);
}
void
mono_mb_emit_cominterop_call (MonoMethodBuilder *mb, MonoMethodSignature *sig, MonoMethod* method)
{
// get function pointer from 1st arg, the COM interface pointer
mono_mb_emit_ldarg (mb, 0);
mono_mb_emit_icon (mb, cominterop_get_com_slot_for_method (method));
mono_mb_emit_icall (mb, cominterop_get_function_pointer);
mono_mb_emit_byte (mb, MONO_CUSTOM_PREFIX);
mono_mb_emit_byte (mb, CEE_MONO_SAVE_LMF);
mono_mb_emit_calli (mb, sig);
mono_mb_emit_byte (mb, MONO_CUSTOM_PREFIX);
mono_mb_emit_byte (mb, CEE_MONO_RESTORE_LMF);
}
void
mono_cominterop_emit_ptr_to_object_conv (MonoMethodBuilder *mb, MonoType *type, MonoMarshalConv conv, MonoMarshalSpec *mspec)
{
switch (conv) {
case MONO_MARSHAL_CONV_OBJECT_INTERFACE:
case MONO_MARSHAL_CONV_OBJECT_IUNKNOWN:
case MONO_MARSHAL_CONV_OBJECT_IDISPATCH: {
static MonoClass* com_interop_proxy_class = NULL;
static MonoMethod* com_interop_proxy_get_proxy = NULL;
static MonoMethod* get_transparent_proxy = NULL;
int real_proxy;
guint32 pos_null = 0, pos_ccw = 0, pos_end = 0;
MonoClass *klass = NULL;
/* COM types are initialized lazily */
mono_init_com_types ();
klass = mono_class_from_mono_type (type);
mono_mb_emit_ldloc (mb, 1);
mono_mb_emit_byte (mb, CEE_LDNULL);
mono_mb_emit_byte (mb, CEE_STIND_REF);
mono_mb_emit_ldloc (mb, 0);
mono_mb_emit_byte (mb, CEE_LDIND_I);
pos_null = mono_mb_emit_short_branch (mb, CEE_BRFALSE_S);
/* load dst to store later */
mono_mb_emit_ldloc (mb, 1);
mono_mb_emit_ldloc (mb, 0);
mono_mb_emit_byte (mb, CEE_LDIND_I);
mono_mb_emit_icon (mb, TRUE);
mono_mb_emit_icall (mb, cominterop_get_ccw_object);
pos_ccw = mono_mb_emit_short_branch (mb, CEE_BRTRUE_S);
if (!com_interop_proxy_class)
com_interop_proxy_class = mono_class_from_name (mono_defaults.corlib, "Mono.Interop", "ComInteropProxy");
if (!com_interop_proxy_get_proxy)
com_interop_proxy_get_proxy = mono_class_get_method_from_name_flags (com_interop_proxy_class, "GetProxy", 2, METHOD_ATTRIBUTE_PRIVATE);
if (!get_transparent_proxy)
get_transparent_proxy = mono_class_get_method_from_name (mono_defaults.real_proxy_class, "GetTransparentProxy", 0);
real_proxy = mono_mb_add_local (mb, &com_interop_proxy_class->byval_arg);
mono_mb_emit_ldloc (mb, 0);
mono_mb_emit_byte (mb, CEE_LDIND_I);
mono_mb_emit_ptr (mb, &mono_defaults.com_object_class->byval_arg);
mono_mb_emit_icall (mb, cominterop_type_from_handle);
mono_mb_emit_managed_call (mb, com_interop_proxy_get_proxy, NULL);
mono_mb_emit_managed_call (mb, get_transparent_proxy, NULL);
if (conv == MONO_MARSHAL_CONV_OBJECT_INTERFACE) {
g_assert (klass);
mono_mb_emit_op (mb, CEE_CASTCLASS, klass);
}
mono_mb_emit_byte (mb, CEE_STIND_REF);
pos_end = mono_mb_emit_short_branch (mb, CEE_BR_S);
/* is already managed object */
mono_mb_patch_short_branch (mb, pos_ccw);
mono_mb_emit_ldloc (mb, 0);
mono_mb_emit_byte (mb, CEE_LDIND_I);
mono_mb_emit_icon (mb, TRUE);
mono_mb_emit_icall (mb, cominterop_get_ccw_object);
if (conv == MONO_MARSHAL_CONV_OBJECT_INTERFACE) {
g_assert (klass);
mono_mb_emit_op (mb, CEE_CASTCLASS, klass);
}
mono_mb_emit_byte (mb, CEE_STIND_REF);
mono_mb_patch_short_branch (mb, pos_end);
/* case if null */
mono_mb_patch_short_branch (mb, pos_null);
break;
}
default:
g_assert_not_reached ();
}
}
void
mono_cominterop_emit_object_to_ptr_conv (MonoMethodBuilder *mb, MonoType *type, MonoMarshalConv conv, MonoMarshalSpec *mspec)
{
switch (conv) {
case MONO_MARSHAL_CONV_OBJECT_INTERFACE:
case MONO_MARSHAL_CONV_OBJECT_IDISPATCH:
case MONO_MARSHAL_CONV_OBJECT_IUNKNOWN: {
guint32 pos_null = 0, pos_rcw = 0, pos_end = 0;
/* COM types are initialized lazily */
mono_init_com_types ();
mono_mb_emit_ldloc (mb, 1);
mono_mb_emit_icon (mb, 0);
mono_mb_emit_byte (mb, CEE_CONV_U);
mono_mb_emit_byte (mb, CEE_STIND_I);
mono_mb_emit_ldloc (mb, 0);
mono_mb_emit_byte (mb, CEE_LDIND_REF);
// if null just break, dst was already inited to 0
pos_null = mono_mb_emit_short_branch (mb, CEE_BRFALSE_S);
mono_mb_emit_ldloc (mb, 0);
mono_mb_emit_byte (mb, CEE_LDIND_REF);
mono_mb_emit_icall (mb, cominterop_object_is_rcw);
pos_rcw = mono_mb_emit_short_branch (mb, CEE_BRFALSE_S);
// load dst to store later
mono_mb_emit_ldloc (mb, 1);
// load src
mono_mb_emit_ldloc (mb, 0);
mono_mb_emit_byte (mb, CEE_LDIND_REF);
mono_mb_emit_ldflda (mb, G_STRUCT_OFFSET (MonoTransparentProxy, rp));
mono_mb_emit_byte (mb, CEE_LDIND_REF);
/* load the RCW from the ComInteropProxy*/
mono_mb_emit_ldflda (mb, G_STRUCT_OFFSET (MonoComInteropProxy, com_object));
mono_mb_emit_byte (mb, CEE_LDIND_REF);
if (conv == MONO_MARSHAL_CONV_OBJECT_INTERFACE) {
mono_mb_emit_ptr (mb, mono_type_get_class (type));
mono_mb_emit_icon (mb, TRUE);
mono_mb_emit_icall (mb, cominterop_get_interface);
}
else if (conv == MONO_MARSHAL_CONV_OBJECT_IUNKNOWN) {
static MonoProperty* iunknown = NULL;
if (!iunknown)
iunknown = mono_class_get_property_from_name (mono_defaults.com_object_class, "IUnknown");
mono_mb_emit_managed_call (mb, iunknown->get, NULL);
}
else if (conv == MONO_MARSHAL_CONV_OBJECT_IDISPATCH) {
static MonoProperty* idispatch = NULL;
if (!idispatch)
idispatch = mono_class_get_property_from_name (mono_defaults.com_object_class, "IDispatch");
mono_mb_emit_managed_call (mb, idispatch->get, NULL);
}
else {
g_assert_not_reached ();
}
mono_mb_emit_byte (mb, CEE_STIND_I);
pos_end = mono_mb_emit_short_branch (mb, CEE_BR_S);
// if not rcw
mono_mb_patch_short_branch (mb, pos_rcw);
/* load dst to store later */
mono_mb_emit_ldloc (mb, 1);
/* load src */
mono_mb_emit_ldloc (mb, 0);
mono_mb_emit_byte (mb, CEE_LDIND_REF);
if (conv == MONO_MARSHAL_CONV_OBJECT_INTERFACE)
mono_mb_emit_ptr (mb, mono_type_get_class (type));
else if (conv == MONO_MARSHAL_CONV_OBJECT_IUNKNOWN)
mono_mb_emit_ptr (mb, mono_defaults.iunknown_class);
else if (conv == MONO_MARSHAL_CONV_OBJECT_IDISPATCH)
mono_mb_emit_ptr (mb, mono_defaults.idispatch_class);
else
g_assert_not_reached ();
mono_mb_emit_icall (mb, cominterop_get_ccw);
mono_mb_emit_byte (mb, CEE_STIND_I);
mono_mb_patch_short_branch (mb, pos_end);
mono_mb_patch_short_branch (mb, pos_null);
break;
}
default:
g_assert_not_reached ();
}
}
/**
* cominterop_get_native_wrapper_adjusted:
* @method: managed COM Interop method
*
* Returns: the generated method to call with signature matching
* the unmanaged COM Method signature
*/
static MonoMethod *
cominterop_get_native_wrapper_adjusted (MonoMethod *method)
{
MonoMethod *res;
MonoMethodBuilder *mb_native;
MonoMarshalSpec **mspecs;
MonoMethodSignature *sig, *sig_native;
MonoMethodPInvoke *piinfo = (MonoMethodPInvoke *) method;
int i;
sig = mono_method_signature (method);
// create unmanaged wrapper
mb_native = mono_mb_new (method->klass, method->name, MONO_WRAPPER_MANAGED_TO_NATIVE);
sig_native = cominterop_method_signature (method);
mspecs = g_new (MonoMarshalSpec*, sig_native->param_count+1);
memset (mspecs, 0, sizeof(MonoMarshalSpec*)*(sig_native->param_count+1));
mono_method_get_marshal_info (method, mspecs);
// move managed args up one
for (i = sig->param_count; i >= 1; i--)
mspecs[i+1] = mspecs[i];
// first arg is IntPtr for interface
mspecs[1] = NULL;
if (!(method->iflags & METHOD_IMPL_ATTRIBUTE_PRESERVE_SIG)) {
// move return spec to last param
if (!MONO_TYPE_IS_VOID (sig->ret))
mspecs[sig_native->param_count] = mspecs[0];
mspecs[0] = NULL;
}
for (i = 1; i < sig_native->param_count; i++) {
int mspec_index = i + 1;
if (mspecs[mspec_index] == NULL) {
// default object to VARIANT
if (sig_native->params[i]->type == MONO_TYPE_OBJECT) {
mspecs[mspec_index] = g_new0 (MonoMarshalSpec, 1);
mspecs[mspec_index]->native = MONO_NATIVE_STRUCT;
}
else if (sig_native->params[i]->type == MONO_TYPE_STRING) {
mspecs[mspec_index] = g_new0 (MonoMarshalSpec, 1);
mspecs[mspec_index]->native = MONO_NATIVE_BSTR;
}
else if (sig_native->params[i]->type == MONO_TYPE_CLASS) {
mspecs[mspec_index] = g_new0 (MonoMarshalSpec, 1);
mspecs[mspec_index]->native = MONO_NATIVE_INTERFACE;
}
else if (sig_native->params[i]->type == MONO_TYPE_BOOLEAN) {
mspecs[mspec_index] = g_new0 (MonoMarshalSpec, 1);
mspecs[mspec_index]->native = MONO_NATIVE_VARIANTBOOL;
}
}
}
if (method->iflags & METHOD_IMPL_ATTRIBUTE_PRESERVE_SIG) {
// move return spec to last param
if (!MONO_TYPE_IS_VOID (sig->ret) && mspecs[0] == NULL) {
// default object to VARIANT
if (sig->ret->type == MONO_TYPE_OBJECT) {
mspecs[0] = g_new0 (MonoMarshalSpec, 1);
mspecs[0]->native = MONO_NATIVE_STRUCT;
}
else if (sig->ret->type == MONO_TYPE_STRING) {
mspecs[0] = g_new0 (MonoMarshalSpec, 1);
mspecs[0]->native = MONO_NATIVE_BSTR;
}
else if (sig->ret->type == MONO_TYPE_CLASS) {
mspecs[0] = g_new0 (MonoMarshalSpec, 1);
mspecs[0]->native = MONO_NATIVE_INTERFACE;
}
else if (sig->ret->type == MONO_TYPE_BOOLEAN) {
mspecs[0] = g_new0 (MonoMarshalSpec, 1);
mspecs[0]->native = MONO_NATIVE_VARIANTBOOL;
}
}
}
mono_marshal_emit_native_wrapper (method->klass->image, mb_native, sig_native, piinfo, mspecs, piinfo->addr, FALSE, TRUE);
res = mono_mb_create_method (mb_native, sig_native, sig_native->param_count + 16);
mono_mb_free (mb_native);
for (i = sig_native->param_count; i >= 0; i--)
if (mspecs [i])
mono_metadata_free_marshal_spec (mspecs [i]);
g_free (mspecs);
return res;
}
/**
* mono_cominterop_get_native_wrapper:
* @method: managed method
*
* Returns: the generated method to call
*/
MonoMethod *
mono_cominterop_get_native_wrapper (MonoMethod *method)
{
MonoMethod *res;
GHashTable *cache;
MonoMethodBuilder *mb;
MonoMethodSignature *sig, *csig;
g_assert (method);
cache = mono_marshal_get_cache (&method->klass->image->cominterop_wrapper_cache, mono_aligned_addr_hash, NULL);
if ((res = mono_marshal_find_in_cache (cache, method)))
return res;
mono_init_com_types ();
if (!method->klass->vtable)
mono_class_setup_vtable (method->klass);
if (!method->klass->methods)
mono_class_setup_methods (method->klass);
g_assert (!method->klass->exception_type); /*FIXME do proper error handling*/
sig = mono_method_signature (method);
mb = mono_mb_new (method->klass, method->name, MONO_WRAPPER_COMINTEROP);
/* if method klass is import, that means method
* is really a com call. let interop system emit it.
*/
if (MONO_CLASS_IS_IMPORT(method->klass)) {
/* FIXME: we have to call actual class .ctor
* instead of just __ComObject .ctor.
*/
if (!strcmp(method->name, ".ctor")) {
static MonoMethod *ctor = NULL;
if (!ctor)
ctor = mono_class_get_method_from_name (mono_defaults.com_object_class, ".ctor", 0);
mono_mb_emit_ldarg (mb, 0);
mono_mb_emit_managed_call (mb, ctor, NULL);
mono_mb_emit_byte (mb, CEE_RET);
}
else {
static MonoMethod * ThrowExceptionForHR = NULL;
MonoMethod *adjusted_method;
int retval = 0;
int ptr_this;
int i;
gboolean preserve_sig = method->iflags & METHOD_IMPL_ATTRIBUTE_PRESERVE_SIG;
// add local variables
ptr_this = mono_mb_add_local (mb, &mono_defaults.int_class->byval_arg);
if (!MONO_TYPE_IS_VOID (sig->ret))
retval = mono_mb_add_local (mb, sig->ret);
// get the type for the interface the method is defined on
// and then get the underlying COM interface for that type
mono_mb_emit_ldarg (mb, 0);
mono_mb_emit_ptr (mb, method);
mono_mb_emit_icall (mb, cominterop_get_method_interface);
mono_mb_emit_icon (mb, TRUE);
mono_mb_emit_icall (mb, cominterop_get_interface);
mono_mb_emit_stloc (mb, ptr_this);
// arg 1 is unmanaged this pointer
mono_mb_emit_ldloc (mb, ptr_this);
// load args
for (i = 1; i <= sig->param_count; i++)
mono_mb_emit_ldarg (mb, i);
// push managed return value as byref last argument
if (!MONO_TYPE_IS_VOID (sig->ret) && !preserve_sig)
mono_mb_emit_ldloc_addr (mb, retval);
adjusted_method = cominterop_get_native_wrapper_adjusted (method);
mono_mb_emit_managed_call (mb, adjusted_method, NULL);
if (!preserve_sig) {
if (!ThrowExceptionForHR)
ThrowExceptionForHR = mono_class_get_method_from_name (mono_defaults.marshal_class, "ThrowExceptionForHR", 1);
mono_mb_emit_managed_call (mb, ThrowExceptionForHR, NULL);
// load return value managed is expecting
if (!MONO_TYPE_IS_VOID (sig->ret))
mono_mb_emit_ldloc (mb, retval);
}
mono_mb_emit_byte (mb, CEE_RET);
}
}
/* Does this case ever get hit? */
else {
char *msg = g_strdup ("non imported interfaces on \
imported classes is not yet implemented.");
mono_mb_emit_exception (mb, "NotSupportedException", msg);
}
csig = mono_metadata_signature_dup_full (method->klass->image, sig);
csig->pinvoke = 0;
res = mono_mb_create_and_cache (cache, method,
mb, csig, csig->param_count + 16);
mono_mb_free (mb);
return res;
}
/**
* mono_cominterop_get_invoke:
* @method: managed method
*
* Returns: the generated method that calls the underlying __ComObject
* rather than the proxy object.
*/
MonoMethod *
mono_cominterop_get_invoke (MonoMethod *method)
{
MonoMethodSignature *sig;
MonoMethodBuilder *mb;
MonoMethod *res;
int i, temp_obj;
GHashTable* cache = mono_marshal_get_cache (&method->klass->image->cominterop_invoke_cache, mono_aligned_addr_hash, NULL);
g_assert (method);
if ((res = mono_marshal_find_in_cache (cache, method)))
return res;
sig = mono_signature_no_pinvoke (method);
/* we cant remote methods without this pointer */
if (!sig->hasthis)
return method;
mb = mono_mb_new (method->klass, method->name, MONO_WRAPPER_COMINTEROP_INVOKE);
/* get real proxy object, which is a ComInteropProxy in this case*/
temp_obj = mono_mb_add_local (mb, &mono_defaults.object_class->byval_arg);
mono_mb_emit_ldarg (mb, 0);
mono_mb_emit_ldflda (mb, G_STRUCT_OFFSET (MonoTransparentProxy, rp));
mono_mb_emit_byte (mb, CEE_LDIND_REF);
/* load the RCW from the ComInteropProxy*/
mono_mb_emit_ldflda (mb, G_STRUCT_OFFSET (MonoComInteropProxy, com_object));
mono_mb_emit_byte (mb, CEE_LDIND_REF);
/* load args and make the call on the RCW */