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marshal.c
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/**
* \file
* Routines for marshaling complex types in P/Invoke methods.
*
* Author:
* Paolo Molaro (lupus@ximian.com)
*
* Copyright 2002-2003 Ximian, Inc (http://www.ximian.com)
* Copyright 2004-2009 Novell, Inc (http://www.novell.com)
* Copyright 2011 Xamarin, Inc (http://www.xamarin.com)
*
* Licensed under the MIT license. See LICENSE file in the project root for full license information.
*/
#include "config.h"
#ifdef HAVE_ALLOCA_H
#include <alloca.h>
#endif
#include <glib.h>
#if defined(HOST_WIN32)
#include <mono/utils/mono-compiler.h>
MONO_PRAGMA_WARNING_PUSH()
MONO_PRAGMA_WARNING_DISABLE (4115) // warning C4115: 'IRpcStubBuffer': named type definition in parentheses
#include <winsock2.h>
#include <windows.h>
#include <objbase.h>
#include <oleauto.h>
MONO_PRAGMA_WARNING_POP()
#include <mono/utils/w32subset.h>
#endif
#include <mono/utils/w32api.h>
#include <mono/metadata/object.h>
#include <mono/metadata/loader.h>
#include "cil-coff.h"
#include "metadata/marshal.h"
#include "metadata/marshal-internals.h"
#include "metadata/marshal-shared.h"
#include "metadata/marshal-lightweight.h"
#include "metadata/method-builder.h"
#include "metadata/method-builder-internals.h"
#include "metadata/tabledefs.h"
#include <mono/metadata/exception.h>
#include <mono/metadata/appdomain.h>
#include "mono/metadata/abi-details.h"
#include "mono/metadata/class-abi-details.h"
#include "mono/metadata/components.h"
#include "mono/metadata/debug-helpers.h"
#include "mono/metadata/threads.h"
#include "mono/metadata/monitor.h"
#include "mono/metadata/class-init.h"
#include "mono/metadata/class-internals.h"
#include "mono/metadata/metadata-internals.h"
#include "mono/metadata/domain-internals.h"
#include "mono/metadata/gc-internals.h"
#include "mono/metadata/threads-types.h"
#include "mono/metadata/string-icalls.h"
#include "mono/metadata/attrdefs.h"
#include "mono/metadata/reflection-internals.h"
#include "mono/metadata/handle.h"
#include "mono/metadata/object-internals.h"
#include "mono/metadata/custom-attrs-internals.h"
#include "mono/metadata/abi-details.h"
#include "mono/metadata/custom-attrs-internals.h"
#include "mono/metadata/loader-internals.h"
#include "mono/metadata/jit-info.h"
#include "mono/metadata/icall-internals.h"
#include "mono/utils/mono-counters.h"
#include "mono/utils/mono-tls.h"
#include "mono/utils/mono-memory-model.h"
#include "mono/utils/atomic.h"
#include <mono/utils/mono-threads.h>
#include <mono/utils/mono-threads-coop.h>
#include <mono/utils/mono-error-internals.h>
#include <string.h>
#include <errno.h>
#include "icall-decl.h"
#include "icall-signatures.h"
static void
mono_string_utf16len_to_builder (MonoStringBuilderHandle sb, const gunichar2 *text, gsize len, MonoError *error);
/* #define DEBUG_RUNTIME_CODE */
#define OPDEF(a,b,c,d,e,f,g,h,i,j) \
a = i,
enum {
#include "mono/cil/opcode.def"
LAST = 0xff
};
#undef OPDEF
/*
* This mutex protects the various marshalling related caches in MonoImage
* and a few other data structures static to this file.
*
* The marshal lock is a non-recursive complex lock that sits below the domain lock in the
* runtime locking latice. Which means it can take simple locks suck as the image lock.
*/
#define mono_marshal_lock() mono_locks_coop_acquire (&marshal_mutex, MarshalLock)
#define mono_marshal_unlock() mono_locks_coop_release (&marshal_mutex, MarshalLock)
static MonoCoopMutex marshal_mutex;
static gboolean marshal_mutex_initialized;
static MonoNativeTlsKey last_error_tls_id;
static MonoNativeTlsKey load_type_info_tls_id;
static gboolean use_aot_wrappers;
static int class_marshal_info_count;
static MonoMarshalLightweightCallbacks *
get_marshal_cb (void);
static void
delegate_hash_table_add (MonoDelegateHandle d);
static void
delegate_hash_table_remove (MonoDelegate *d);
/* Lazy class loading functions */
//used by marshal-ilgen.c
GENERATE_TRY_GET_CLASS_WITH_CACHE (stringbuilder, "System.Text", "StringBuilder");
static GENERATE_TRY_GET_CLASS_WITH_CACHE (unmanaged_function_pointer_attribute, "System.Runtime.InteropServices", "UnmanagedFunctionPointerAttribute");
static GENERATE_TRY_GET_CLASS_WITH_CACHE (suppress_gc_transition_attribute, "System.Runtime.InteropServices", "SuppressGCTransitionAttribute")
static GENERATE_TRY_GET_CLASS_WITH_CACHE (unmanaged_callers_only_attribute, "System.Runtime.InteropServices", "UnmanagedCallersOnlyAttribute")
static GENERATE_TRY_GET_CLASS_WITH_CACHE (unmanaged_callconv_attribute, "System.Runtime.InteropServices", "UnmanagedCallConvAttribute")
GENERATE_TRY_GET_CLASS_WITH_CACHE (swift_self, "System.Runtime.InteropServices.Swift", "SwiftSelf")
GENERATE_TRY_GET_CLASS_WITH_CACHE (swift_self_t, "System.Runtime.InteropServices.Swift", "SwiftSelf`1");
GENERATE_TRY_GET_CLASS_WITH_CACHE (swift_error, "System.Runtime.InteropServices.Swift", "SwiftError")
GENERATE_TRY_GET_CLASS_WITH_CACHE (swift_indirect_result, "System.Runtime.InteropServices.Swift", "SwiftIndirectResult")
static gboolean type_is_blittable (MonoType *type);
static IlgenCallbacksToMono ilgenCallbacksToMono = {
&mono_get_object_type,
&mono_marshal_get_ptr_to_string_conv,
&mono_class_is_subclass_of_internal,
&mono_class_native_size,
&mono_class_try_get_handleref_class,
&mono_class_try_get_safehandle_class,
&mono_class_try_get_stringbuilder_class,
&mono_defaults,
&mono_marshal_boolean_conv_in_get_local_type,
&mono_marshal_boolean_managed_conv_in_get_conv_arg_class,
&mono_marshal_get_ptr_to_stringbuilder_conv,
&mono_marshal_get_string_encoding,
&mono_marshal_get_string_to_ptr_conv,
&mono_marshal_get_stringbuilder_to_ptr_conv,
&mono_marshal_load_type_info,
&mono_marshal_shared_conv_to_icall,
&mono_marshal_shared_emit_marshal_custom_get_instance,
&mono_marshal_shared_emit_struct_conv,
&mono_marshal_shared_emit_struct_conv_full,
&mono_marshal_shared_get_method_nofail,
&mono_marshal_shared_get_sh_dangerous_add_ref,
&mono_marshal_shared_get_sh_dangerous_release,
&mono_marshal_shared_init_safe_handle,
&mono_marshal_shared_is_in,
&mono_marshal_shared_is_out,
&mono_pinvoke_is_unicode,
&mono_reflection_type_from_name_checked,
&mono_memory_barrier,
&mono_marshal_need_free,
&mono_get_int_type,
{
&mono_marshal_shared_mb_emit_exception_marshal_directive,
&mono_mb_add_local,
&mono_mb_emit_add_to_local,
&mono_mb_emit_auto_layout_exception,
&mono_mb_emit_branch,
&mono_mb_emit_branch_label,
&mono_mb_emit_byte,
&mono_mb_emit_exception,
&mono_mb_emit_exception_full,
&mono_mb_emit_icall_id,
&mono_mb_emit_icon,
&mono_mb_emit_ldarg,
&mono_mb_emit_ldarg_addr,
&mono_mb_emit_ldflda,
&mono_mb_emit_ldloc,
&mono_mb_emit_ldloc_addr,
&mono_mb_emit_managed_call,
&mono_mb_emit_op,
&mono_mb_emit_stloc,
&mono_mb_get_label,
&mono_mb_patch_branch,
}
};
IlgenCallbacksToMono*
mono_marshal_get_mono_callbacks_for_ilgen (void)
{
return &ilgenCallbacksToMono;
}
static MonoImage*
get_method_image (MonoMethod *method)
{
return m_class_get_image (method->klass);
}
// func is an identifier, that names a function, and is also in jit-icall-reg.h,
// and therefore a field in mono_jit_icall_info and can be token pasted into an enum value.
//
// The name of func must be linkable for AOT, for example g_free does not work (monoeg_g_free instead),
// nor does the C++ overload fmod (mono_fmod instead). These functions therefore
// must be extern "C".
#ifndef DISABLE_JIT
#define register_icall(func, sig, no_wrapper) \
(mono_register_jit_icall_info (&mono_get_jit_icall_info ()->func, (gconstpointer)func, #func, (sig), (no_wrapper), #func))
#else
/* No need for the name/C symbol */
#define register_icall(func, sig, no_wrapper) \
(mono_register_jit_icall_info (&mono_get_jit_icall_info ()->func, (gconstpointer)func, NULL, (sig), (no_wrapper), NULL))
#endif
MonoMethodSignature*
mono_signature_no_pinvoke (MonoMethod *method)
{
MonoMethodSignature *sig = mono_method_signature_internal (method);
if (sig->pinvoke) {
sig = mono_metadata_signature_dup_full (get_method_image (method), sig);
sig->pinvoke = FALSE;
}
return sig;
}
void
mono_marshal_init_tls (void)
{
mono_native_tls_alloc (&last_error_tls_id, NULL);
mono_native_tls_alloc (&load_type_info_tls_id, NULL);
}
MonoObjectHandle
mono_object_isinst_icall_impl (MonoObjectHandle obj, MonoClass* klass, MonoError *error)
{
if (!klass)
return NULL_HANDLE;
/* This is called from stelemref so it is expected to succeed */
/* Fastpath */
if (mono_class_is_interface (klass)) {
MonoVTable *vt = mono_handle_vtable (obj);
if (!m_class_is_inited (klass))
mono_class_init_internal (klass);
if (MONO_VTABLE_IMPLEMENTS_INTERFACE (vt, m_class_get_interface_id (klass)))
return obj;
}
return mono_object_handle_isinst (obj, klass, error);
}
MonoStringHandle
ves_icall_mono_string_from_utf16_impl (const gunichar2 *data, MonoError *error)
{
MonoString *s = mono_string_from_utf16_checked (data, error);
return_val_if_nok (error, NULL_HANDLE_STRING);
return MONO_HANDLE_NEW (MonoString, s);
}
char*
ves_icall_mono_string_to_utf8_impl (MonoStringHandle str, MonoError *error)
{
return mono_string_handle_to_utf8 (str, error);
}
MonoStringHandle
ves_icall_string_new_wrapper_impl (const char *text, MonoError *error)
{
return text ? mono_string_new_handle (text, error) : NULL_HANDLE_STRING;
}
void
mono_marshal_init (void)
{
static gboolean module_initialized = FALSE;
if (!module_initialized) {
module_initialized = TRUE;
mono_coop_mutex_init_recursive (&marshal_mutex);
marshal_mutex_initialized = TRUE;
register_icall (mono_marshal_string_to_utf16, mono_icall_sig_ptr_obj, FALSE);
register_icall (mono_marshal_string_to_utf16_copy, mono_icall_sig_ptr_obj, FALSE);
register_icall (mono_string_to_utf16_internal, mono_icall_sig_ptr_obj, FALSE);
register_icall (ves_icall_mono_string_from_utf16, mono_icall_sig_obj_ptr, FALSE);
register_icall (mono_string_from_byvalstr, mono_icall_sig_obj_ptr_int, FALSE);
register_icall (mono_string_from_byvalwstr, mono_icall_sig_obj_ptr_int, FALSE);
register_icall (mono_string_from_ansibstr, mono_icall_sig_obj_ptr, FALSE);
register_icall (mono_string_from_tbstr, mono_icall_sig_obj_ptr, FALSE);
register_icall (mono_string_new_wrapper_internal, mono_icall_sig_obj_ptr, FALSE);
register_icall (ves_icall_string_new_wrapper, mono_icall_sig_obj_ptr, FALSE);
register_icall (mono_string_new_len_wrapper, mono_icall_sig_obj_ptr_int, FALSE);
register_icall (ves_icall_mono_string_to_utf8, mono_icall_sig_ptr_obj, FALSE);
register_icall (mono_string_to_utf8str, mono_icall_sig_ptr_obj, FALSE);
register_icall (mono_string_to_ansibstr, mono_icall_sig_ptr_object, FALSE);
register_icall (mono_string_to_tbstr, mono_icall_sig_ptr_object, FALSE);
register_icall (mono_string_builder_to_utf8, mono_icall_sig_ptr_object, FALSE);
register_icall (mono_string_builder_to_utf16, mono_icall_sig_ptr_object, FALSE);
register_icall (mono_array_to_savearray, mono_icall_sig_ptr_object, FALSE);
register_icall (mono_array_to_lparray, mono_icall_sig_ptr_object, FALSE);
register_icall (mono_free_lparray, mono_icall_sig_void_object_ptr, FALSE);
register_icall (mono_byvalarray_to_byte_array, mono_icall_sig_void_object_ptr_int32, FALSE);
register_icall (mono_array_to_byte_byvalarray, mono_icall_sig_void_ptr_object_int32, FALSE);
register_icall (mono_delegate_to_ftnptr, mono_icall_sig_ptr_object, FALSE);
register_icall (mono_ftnptr_to_delegate, mono_icall_sig_object_ptr_ptr, FALSE);
register_icall (mono_marshal_asany, mono_icall_sig_ptr_object_int32_int32, FALSE);
register_icall (mono_marshal_free_asany, mono_icall_sig_void_object_ptr_int32_int32, FALSE);
register_icall (ves_icall_marshal_alloc, mono_icall_sig_ptr_ptr, FALSE);
register_icall (mono_marshal_free, mono_icall_sig_void_ptr, FALSE);
register_icall (mono_marshal_set_last_error, mono_icall_sig_void, TRUE);
register_icall (mono_marshal_set_last_error_windows, mono_icall_sig_void_int32, TRUE);
register_icall (mono_marshal_clear_last_error, mono_icall_sig_void, TRUE);
register_icall (mono_string_utf8_to_builder, mono_icall_sig_void_ptr_ptr, FALSE);
register_icall (mono_string_utf8_to_builder2, mono_icall_sig_object_ptr, FALSE);
register_icall (mono_string_utf16_to_builder, mono_icall_sig_void_ptr_ptr, FALSE);
register_icall (mono_string_utf16_to_builder2, mono_icall_sig_object_ptr, FALSE);
register_icall (mono_marshal_free_array, mono_icall_sig_void_ptr_int32, FALSE);
register_icall (mono_string_to_byvalstr, mono_icall_sig_void_ptr_ptr_int32, FALSE);
register_icall (mono_string_to_byvalwstr, mono_icall_sig_void_ptr_ptr_int32, FALSE);
register_icall (mono_string_to_bstr, mono_icall_sig_ptr_obj, FALSE);
register_icall (mono_string_from_bstr_icall, mono_icall_sig_obj_ptr, FALSE);
register_icall (mono_free_bstr, mono_icall_sig_void_ptr, FALSE);
// Because #define g_free monoeg_g_free.
register_icall (monoeg_g_free, mono_icall_sig_void_ptr, FALSE);
register_icall (mono_object_isinst_icall, mono_icall_sig_object_object_ptr, TRUE);
register_icall (mono_struct_delete_old, mono_icall_sig_void_ptr_ptr, FALSE);
register_icall (mono_get_addr_compiled_method, mono_icall_sig_ptr_ptr_object, FALSE);
register_icall (mono_delegate_begin_invoke, mono_icall_sig_object_object_ptr, FALSE);
register_icall (mono_delegate_end_invoke, mono_icall_sig_object_object_ptr, FALSE);
register_icall (mono_gc_wbarrier_generic_nostore_internal, mono_icall_sig_void_ptr, TRUE);
register_icall (mono_gchandle_get_target_internal, mono_icall_sig_object_ptr, TRUE);
register_icall (mono_marshal_isinst_with_cache, mono_icall_sig_object_object_ptr_ptr, FALSE);
register_icall (mono_threads_enter_gc_safe_region_unbalanced, mono_icall_sig_ptr_ptr, TRUE);
register_icall (mono_threads_exit_gc_safe_region_unbalanced, mono_icall_sig_void_ptr_ptr, TRUE);
register_icall (mono_threads_enter_gc_unsafe_region_unbalanced, mono_icall_sig_ptr_ptr, TRUE);
register_icall (mono_threads_exit_gc_unsafe_region_unbalanced, mono_icall_sig_void_ptr_ptr, TRUE);
register_icall (mono_threads_attach_coop, mono_icall_sig_ptr_ptr_ptr, TRUE);
register_icall (mono_threads_detach_coop, mono_icall_sig_void_ptr_ptr, TRUE);
register_icall (mono_marshal_get_type_object, mono_icall_sig_object_ptr, TRUE);
register_icall (mono_marshal_lookup_pinvoke, mono_icall_sig_ptr_ptr, FALSE);
mono_counters_register ("MonoClass::class_marshal_info_count count",
MONO_COUNTER_METADATA | MONO_COUNTER_INT, &class_marshal_info_count);
}
}
void
mono_marshal_lock_internal (void)
{
mono_marshal_lock ();
}
void
mono_marshal_unlock_internal (void)
{
mono_marshal_unlock ();
}
// This is a JIT icall, it sets the pending exception (in wrapper) and return NULL on error.
gpointer
mono_delegate_to_ftnptr_impl (MonoDelegateHandle delegate, MonoError *error)
{
gpointer result = NULL;
MonoMethod *method, *wrapper;
MonoClass *klass;
MonoGCHandle target_handle = 0;
if (MONO_HANDLE_IS_NULL (delegate))
goto leave;
if (MONO_HANDLE_GETVAL (delegate, delegate_trampoline)) {
result = MONO_HANDLE_GETVAL (delegate, delegate_trampoline);
goto leave;
}
klass = mono_handle_class (delegate);
g_assert (m_class_is_delegate (klass));
method = MONO_HANDLE_GETVAL (delegate, method);
if (MONO_HANDLE_GETVAL (delegate, method_is_virtual)) {
MonoObjectHandle delegate_target = MONO_HANDLE_NEW_GET (MonoObject, delegate, target);
method = mono_object_handle_get_virtual_method (delegate_target, method, error);
goto_if_nok (error, leave);
}
if (method->flags & METHOD_ATTRIBUTE_PINVOKE_IMPL) {
gpointer ftnptr;
ftnptr = mono_lookup_pinvoke_call_internal (method, error);
if (!ftnptr) {
g_assert (!is_ok (error));
goto leave;
}
result = ftnptr;
goto leave;
}
MonoObjectHandle delegate_target;
delegate_target = MONO_HANDLE_NEW_GET (MonoObject, delegate, target);
if (!MONO_HANDLE_IS_NULL (delegate_target)) {
/* Produce a location which can be embedded in JITted code */
target_handle = mono_gchandle_new_weakref_from_handle (delegate_target);
}
wrapper = mono_marshal_get_managed_wrapper (method, klass, target_handle, error);
goto_if_nok (error, leave);
MONO_HANDLE_SETVAL (delegate, delegate_trampoline, gpointer, mono_compile_method_checked (wrapper, error));
goto_if_nok (error, leave);
// Add the delegate to the delegate hash table
delegate_hash_table_add (delegate);
/* when the object is collected, collect the dynamic method, too */
mono_object_register_finalizer ((MonoObject*) MONO_HANDLE_RAW (delegate));
result = MONO_HANDLE_GETVAL (delegate, delegate_trampoline);
leave:
if (!is_ok (error) && target_handle != 0)
mono_gchandle_free_internal (target_handle);
return result;
}
/*
* this hash table maps from a delegate trampoline object to a weak reference
* of the delegate. As an optimizations with a non-moving GC we store the
* object pointer itself, otherwise we use a GC handle.
*/
static GHashTable *delegate_hash_table;
static GHashTable *
delegate_hash_table_new (void) {
return g_hash_table_new (NULL, NULL);
}
static void
delegate_hash_table_remove (MonoDelegate *d)
{
MonoGCHandle gchandle = NULL;
if (!d->target)
return;
mono_marshal_lock ();
if (delegate_hash_table == NULL)
delegate_hash_table = delegate_hash_table_new ();
gchandle = (MonoGCHandle)g_hash_table_lookup (delegate_hash_table, d->delegate_trampoline);
g_hash_table_remove (delegate_hash_table, d->delegate_trampoline);
mono_marshal_unlock ();
if (gchandle)
mono_gchandle_free_internal (gchandle);
}
static void
delegate_hash_table_add (MonoDelegateHandle d)
{
mono_marshal_lock ();
if (delegate_hash_table == NULL)
delegate_hash_table = delegate_hash_table_new ();
gpointer delegate_trampoline = MONO_HANDLE_GETVAL (d, delegate_trampoline);
gboolean has_target = MONO_HANDLE_GETVAL (d, target) != NULL;
if (has_target) {
// If the delegate has an instance method there is 1 to 1 mapping between
// the delegate object and the delegate_trampoline
MonoGCHandle gchandle = (MonoGCHandle)g_hash_table_lookup (delegate_hash_table, delegate_trampoline);
if (gchandle) {
// Somehow, some other thread beat us to it ?
g_assert (mono_gchandle_target_equal (gchandle, MONO_HANDLE_CAST (MonoObject, d)));
} else {
gchandle = mono_gchandle_new_weakref_from_handle (MONO_HANDLE_CAST (MonoObject, d));
g_hash_table_insert (delegate_hash_table, delegate_trampoline, gchandle);
}
} else {
if (g_hash_table_lookup (delegate_hash_table, delegate_trampoline) == NULL) {
MonoGCHandle gchandle = mono_gchandle_from_handle (MONO_HANDLE_CAST (MonoObject, d), FALSE);
// This delegate will always be associated with its delegate_trampoline in the table.
// We don't free this delegate object because it is too expensive to keep track of these
// pairs and avoid races with the delegate finalization.
g_hash_table_insert (delegate_hash_table, delegate_trampoline, gchandle);
}
}
mono_marshal_unlock ();
}
/*
* mono_marshal_use_aot_wrappers:
*
* Instructs this module to use AOT compatible wrappers.
*/
void
mono_marshal_use_aot_wrappers (gboolean use)
{
use_aot_wrappers = use;
}
static void
parse_unmanaged_function_pointer_attr (MonoClass *klass, MonoMethodPInvoke *piinfo)
{
ERROR_DECL (error);
MonoCustomAttrInfo *cinfo;
MonoReflectionUnmanagedFunctionPointerAttribute *attr;
/* The attribute is only available in Net 2.0 */
if (mono_class_try_get_unmanaged_function_pointer_attribute_class ()) {
/*
* The pinvoke attributes are stored in a real custom attribute so we have to
* construct it.
*/
cinfo = mono_custom_attrs_from_class_checked (klass, error);
if (!is_ok (error)) {
g_warning ("Could not load UnmanagedFunctionPointerAttribute due to %s", mono_error_get_message (error));
mono_error_cleanup (error);
}
if (cinfo && !mono_runtime_get_no_exec ()) {
attr = (MonoReflectionUnmanagedFunctionPointerAttribute*)mono_custom_attrs_get_attr_checked (cinfo, mono_class_try_get_unmanaged_function_pointer_attribute_class (), error);
if (attr) {
piinfo->piflags = GINT_TO_UINT16 ((attr->call_conv << 8) | (attr->charset ? (attr->charset - 1) * 2 : 1) | attr->set_last_error);
} else {
if (!is_ok (error)) {
g_warning ("Could not load UnmanagedFunctionPointerAttribute due to %s", mono_error_get_message (error));
mono_error_cleanup (error);
}
}
if (!cinfo->cached)
mono_custom_attrs_free (cinfo);
}
}
}
/* This is a JIT icall, it sets the pending exception (in wrapper) and returns NULL on error */
MonoDelegateHandle
mono_ftnptr_to_delegate_impl (MonoClass *klass, gpointer ftn, MonoError *error)
{
MonoGCHandle gchandle;
MonoDelegateHandle d = MONO_HANDLE_NEW (MonoDelegate, NULL);
if (ftn == NULL)
goto leave;
mono_marshal_lock ();
if (delegate_hash_table == NULL)
delegate_hash_table = delegate_hash_table_new ();
gchandle = (MonoGCHandle)g_hash_table_lookup (delegate_hash_table, ftn);
mono_marshal_unlock ();
if (gchandle)
MONO_HANDLE_ASSIGN (d, MONO_HANDLE_CAST (MonoDelegate, mono_gchandle_get_target_handle (gchandle)));
if (MONO_HANDLE_IS_NULL (d)) {
/* This is a native function, so construct a delegate for it */
MonoMethodSignature *sig;
MonoMethod *wrapper;
MonoMarshalSpec **mspecs;
MonoMethod *invoke = mono_get_delegate_invoke_internal (klass);
MonoMethodPInvoke piinfo;
MonoObjectHandle this_obj;
int i;
if (!invoke) {
mono_error_set_argument_format (error, "t", "Type %s has no Invoke method.", m_class_get_name (klass));
goto leave;
}
if (use_aot_wrappers) {
wrapper = mono_marshal_get_native_func_wrapper_aot (klass);
this_obj = MONO_HANDLE_NEW (MonoObject, mono_value_box_checked (mono_defaults.int_class, &ftn, error));
goto_if_nok (error, leave);
} else {
memset (&piinfo, 0, sizeof (piinfo));
parse_unmanaged_function_pointer_attr (klass, &piinfo);
mspecs = g_new0 (MonoMarshalSpec*, mono_method_signature_internal (invoke)->param_count + 1);
mono_method_get_marshal_info (invoke, mspecs);
/* Freed below so don't alloc from mempool */
sig = mono_metadata_signature_dup (mono_method_signature_internal (invoke));
sig->hasthis = 0;
wrapper = mono_marshal_get_native_func_wrapper (m_class_get_image (klass), sig, &piinfo, mspecs, ftn);
this_obj = MONO_HANDLE_NEW (MonoObject, NULL);
for (i = mono_method_signature_internal (invoke)->param_count; i >= 0; i--)
if (mspecs [i])
mono_metadata_free_marshal_spec (mspecs [i]);
g_free (mspecs);
g_free (sig);
}
MONO_HANDLE_ASSIGN (d, mono_object_new_handle (klass, error));
goto_if_nok (error, leave);
gpointer compiled_ptr = mono_compile_method_checked (wrapper, error);
goto_if_nok (error, leave);
mono_delegate_ctor (MONO_HANDLE_CAST (MonoObject, d), this_obj, compiled_ptr, wrapper, error);
goto_if_nok (error, leave);
}
g_assert (!MONO_HANDLE_IS_NULL (d));
if (MONO_HANDLE_DOMAIN (d) != mono_domain_get ())
mono_error_set_not_supported (error, "Delegates cannot be marshalled from native code into a domain other than their home domain");
leave:
return d;
}
void
mono_delegate_free_ftnptr (MonoDelegate *delegate)
{
MonoJitInfo *ji;
void *ptr;
delegate_hash_table_remove (delegate);
ptr = (gpointer)mono_atomic_xchg_ptr (&delegate->delegate_trampoline, NULL);
if (!delegate->target) {
/* The wrapper method is shared between delegates -> no need to free it */
return;
}
if (ptr) {
MonoGCHandle gchandle;
void **method_data;
MonoMethod *method;
ji = mono_jit_info_table_find_internal (mono_get_addr_from_ftnptr (ptr), TRUE, FALSE);
/* FIXME we leak wrapper with the interpreter */
if (!ji)
return;
method = mono_jit_info_get_method (ji);
method_data = (void **)((MonoMethodWrapper*)method)->method_data;
/*the target gchandle is the first entry after size and the wrapper itself.*/
gchandle = (MonoGCHandle)method_data [2];
if (gchandle)
mono_gchandle_free_internal (gchandle);
mono_runtime_free_method (method);
}
}
/* This is a JIT icall, it sets the pending exception (in wrapper) and returns NULL on error */
MonoStringHandle
mono_string_from_byvalstr_impl (const char *data, int max_len, MonoError *error)
{
// FIXME This optimization ok to miss before wrapper? Or null is rare?
if (!data)
return NULL_HANDLE_STRING;
int len = 0;
while (len < max_len - 1 && data [len])
len++;
// FIXMEcoop
MonoString *s = mono_string_new_len_checked (data, len, error);
return_val_if_nok (error, NULL_HANDLE_STRING);
return MONO_HANDLE_NEW (MonoString, s);
}
/* This is a JIT icall, it sets the pending exception (in wrapper) and return NULL on error */
MonoStringHandle
mono_string_from_byvalwstr_impl (const gunichar2 *data, int max_len, MonoError *error)
{
// FIXME This optimization ok to miss before wrapper? Or null is rare?
if (!data)
return NULL_HANDLE_STRING;
// FIXME Check max_len while scanning data? mono_string_from_byvalstr does.
const size_t len = g_utf16_len (data);
return mono_string_new_utf16_handle (data, (gint32)MIN (len, GINT_TO_UINT(max_len)), error);
}
gpointer
mono_array_to_savearray_impl (MonoArrayHandle array, MonoError *error)
{
if (!MONO_HANDLE_BOOL (array))
return NULL;
g_assert_not_reached ();
return NULL;
}
gpointer
mono_array_to_lparray_impl (MonoArrayHandle array_handle, MonoError *error)
{
if (!MONO_HANDLE_BOOL (array_handle))
return NULL;
MonoArray *array = MONO_HANDLE_RAW (array_handle); // FIXMEcoop
return array->vector;
}
void
mono_free_lparray_impl (MonoArrayHandle array, gpointer* nativeArray, MonoError *error)
{
}
/* This is a JIT icall, it sets the pending exception (in wrapper) and returns on error */
void
mono_byvalarray_to_byte_array_impl (MonoArrayHandle arr, const char *native_arr, guint32 elnum, MonoError *error)
{
g_assert (m_class_get_element_class (mono_handle_class (arr)) == mono_defaults.char_class);
GError *gerror = NULL;
glong items_written;
gunichar2 *ut = g_utf8_to_utf16 (native_arr, elnum, NULL, &items_written, &gerror);
if (gerror) {
// FIXME set error?
g_error_free (gerror);
return;
}
MonoGCHandle gchandle = NULL;
memcpy (MONO_ARRAY_HANDLE_PIN (arr, gunichar2, 0, &gchandle), ut, items_written * sizeof (gunichar2));
mono_gchandle_free_internal (gchandle);
g_free (ut);
}
/* This is a JIT icall, it sets the pending exception (in wrapper) and returns on error */
void
mono_array_to_byte_byvalarray_impl (gpointer native_arr, MonoArrayHandle arr, guint32 elnum, MonoError *error)
{
g_assert (m_class_get_element_class (mono_handle_class (arr)) == mono_defaults.char_class);
GError *gerror = NULL;
MonoGCHandle gchandle = NULL;
char *as = g_utf16_to_utf8 (MONO_ARRAY_HANDLE_PIN (arr, gunichar2, 0, &gchandle), GUINTPTR_TO_LONG (mono_array_handle_length (arr)), NULL, NULL, &gerror);
mono_gchandle_free_internal (gchandle);
if (gerror) {
mono_error_set_argument (error, "string", gerror->message);
g_error_free (gerror);
return;
}
memcpy (native_arr, as, MIN (strlen (as), elnum));
g_free (as);
}
static MonoStringBuilderHandle
mono_string_builder_new (int starting_string_length, MonoError *error)
{
static MonoClass *string_builder_class;
static MonoMethod *sb_ctor;
void *args [1];
int initial_len = starting_string_length;
if (initial_len < 0)
initial_len = 0;
if (!sb_ctor) {
MonoMethodDesc *desc;
MonoMethod *m;
string_builder_class = mono_class_try_get_stringbuilder_class ();
g_assert (string_builder_class); //TODO don't swallow the error
desc = mono_method_desc_new (":.ctor(int)", FALSE);
m = mono_method_desc_search_in_class (desc, string_builder_class);
g_assert (m);
mono_method_desc_free (desc);
mono_memory_barrier ();
sb_ctor = m;
}
// We make a new array in the _to_builder function, so this
// array will always be garbage collected.
args [0] = &initial_len;
MonoStringBuilderHandle sb = MONO_HANDLE_CAST (MonoStringBuilder, mono_object_new_handle (string_builder_class, error));
mono_error_assert_ok (error);
mono_runtime_try_invoke_handle (sb_ctor, MONO_HANDLE_CAST (MonoObject, sb), args, error);
mono_error_assert_ok (error);
MonoArrayHandle chunkChars = MONO_HANDLE_NEW_GET (MonoArray, sb, chunkChars);
g_assert (MONO_HANDLE_GETVAL (chunkChars, max_length) >= GINT_TO_UINT(initial_len));
return sb;
}
static void
mono_string_utf16_to_builder_copy (MonoStringBuilderHandle sb, const gunichar2 *text, size_t string_len, MonoError *error)
{
MonoArrayHandle chunkChars = MONO_HANDLE_NEW (MonoArray, NULL);
MonoStringBuilderHandle chunk = MONO_HANDLE_NEW (MonoStringBuilder, MONO_HANDLE_RAW (sb));
guint capacity = mono_string_builder_capacity (sb);
g_assert (capacity >= string_len);
MONO_ENTER_NO_SAFEPOINTS;
do {
MONO_HANDLE_GET (chunkChars, chunk, chunkChars);
const guint32 maxLength = MONO_HANDLE_GETVAL (chunkChars, max_length);
g_assert (maxLength >= 0);
const guint32 chunkOffset = MONO_HANDLE_GETVAL (chunk, chunkOffset);
g_assert (chunkOffset >= 0);
if (maxLength > 0 && chunkOffset < string_len) {
// Check that we will not overrun our boundaries.
int charsToCopy = (int)MIN (string_len - chunkOffset, maxLength);
memcpy (MONO_HANDLE_RAW (chunkChars)->vector, text + chunkOffset, charsToCopy * sizeof (gunichar2));
MONO_HANDLE_SETVAL (chunk, chunkLength, int, charsToCopy);
} else {
MONO_HANDLE_SETVAL (chunk, chunkLength, int, 0);
}
MONO_HANDLE_GET (chunk, chunk, chunkPrevious);
} while (MONO_HANDLE_BOOL (chunk));
MONO_EXIT_NO_SAFEPOINTS;
}
MonoStringBuilderHandle
mono_string_utf16_to_builder2_impl (const gunichar2 *text, MonoError *error)
{
if (!text)
return NULL_HANDLE_STRING_BUILDER;
const gsize len = g_utf16_len (text);
MonoStringBuilderHandle sb = mono_string_builder_new ((int)len, error);
return_val_if_nok (error, NULL_HANDLE_STRING_BUILDER);
mono_string_utf16len_to_builder (sb, text, len, error);
return_val_if_nok (error, NULL_HANDLE_STRING_BUILDER);
return sb;
}
static void
mono_string_utf8len_to_builder (MonoStringBuilderHandle sb, const char *text, gsize len, MonoError *error)
{
if (!MONO_HANDLE_BOOL (sb) || !text)
return;
GError *gerror = NULL;
glong copied;
gunichar2* ut = g_utf8_to_utf16 (text, (glong)len, NULL, &copied, &gerror);
guint capacity = mono_string_builder_capacity (sb);
if (GLONG_TO_ULONG(copied) > capacity)
copied = capacity;
if (!gerror) {
MONO_HANDLE_SETRAW (sb, chunkPrevious, NULL);
mono_string_utf16_to_builder_copy (sb, ut, copied, error);
} else {
// FIXME? Set error?
g_error_free (gerror);
}
g_free (ut);
}
void
mono_string_utf8_to_builder_impl (MonoStringBuilderHandle sb, const char *text, MonoError *error)
{
mono_string_utf8len_to_builder (sb, text, text ? strlen (text) : 0, error);
}
MonoStringBuilderHandle
mono_string_utf8_to_builder2_impl (const char *text, MonoError *error)
{
if (!text)
return NULL_HANDLE_STRING_BUILDER;
const gsize len = strlen (text);
MonoStringBuilderHandle sb = mono_string_builder_new ((int)len, error);
return_val_if_nok (error, NULL_HANDLE_STRING_BUILDER);
mono_string_utf8len_to_builder (sb, text, len, error);
return_val_if_nok (error, NULL_HANDLE_STRING_BUILDER);
return sb;
}
static void
mono_string_utf16len_to_builder (MonoStringBuilderHandle sb, const gunichar2 *text, gsize len, MonoError *error)
{
if (!MONO_HANDLE_BOOL (sb) || !text)
return;
len = MIN (len, mono_string_builder_capacity (sb));
mono_string_utf16_to_builder_copy (sb, text, len, error);
}
void
mono_string_utf16_to_builder_impl (MonoStringBuilderHandle sb, const gunichar2 *text, MonoError *error)
{
mono_string_utf16len_to_builder (sb, text, text ? g_utf16_len (text) : 0, error);
}
/**
* mono_string_builder_to_utf8:
* \param sb the string builder
*
* Converts to utf8 the contents of the \c MonoStringBuilder .
*
* \returns a utf8 string with the contents of the \c StringBuilder .
*
* The return value must be released with mono_marshal_free.
*
* This is a JIT icall, it sets the pending exception (in wrapper) and returns NULL on error.
*/
gchar*
mono_string_builder_to_utf8_impl (MonoStringBuilderHandle sb, MonoError *error)
{
char *res = NULL;
GError *gerror = NULL;
char *tmp = NULL;
gunichar2 *str_utf16 = NULL;
glong byte_count;
guint len = 0;
if (!MONO_HANDLE_BOOL (sb))
goto exit;
str_utf16 = mono_string_builder_to_utf16_impl (sb, error);
goto_if_nok (error, exit);
tmp = g_utf16_to_utf8 (str_utf16, mono_string_builder_string_length (sb), NULL, &byte_count, &gerror);
if (gerror) {
mono_error_set_execution_engine (error, "Failed to convert StringBuilder from utf16 to utf8");
goto exit;
}
len = mono_string_builder_capacity (sb) + 1;
res = (char *)mono_marshal_alloc (MAX (GLONG_TO_ULONG(byte_count) + 1, len), error);
if (!is_ok (error)) {
res = NULL;
goto exit;
}
memcpy (res, tmp, byte_count);
res [byte_count] = 0;
exit:
g_error_free (gerror);
mono_marshal_free (str_utf16);
g_free (tmp);
return res;
}
/**
* mono_string_builder_to_utf16:
* \param sb the string builder
*
* Converts to utf16 the contents of the \c MonoStringBuilder .
*
* Returns: a utf16 string with the contents of the \c StringBuilder .
*
* The return value must be released with mono_marshal_free.
*
* This is a JIT icall, it sets the pending exception (in wrapper) and returns NULL on error.
*/
gunichar2*
mono_string_builder_to_utf16_impl (MonoStringBuilderHandle sb, MonoError *error)
{
if (!MONO_HANDLE_BOOL (sb))
return NULL;
g_assert (MONO_HANDLE_GET_BOOL (sb, chunkChars));
guint capacity = mono_string_builder_capacity (sb);
guint length = mono_string_builder_string_length (sb);
// Follow CoreCLR and double NULL terminate the buffer so we have more protection
// against native code putting garbage in there.
gunichar2 *str = (gunichar2 *)mono_marshal_alloc ((capacity + 2) * sizeof (gunichar2), error);
return_val_if_nok (error, NULL);
str [capacity] = 0;
str [capacity + 1] = 0;
MonoArrayHandle chunkChars = MONO_HANDLE_NEW (MonoArray, NULL);
MonoStringBuilderHandle chunk = MONO_HANDLE_NEW (MonoStringBuilder, MONO_HANDLE_RAW (sb));
MONO_ENTER_NO_SAFEPOINTS;
do {
const int chunkLength = MONO_HANDLE_GETVAL (chunk, chunkLength);
g_assert (chunkLength >= 0);
if (chunkLength > 0) {
// Check that we will not overrun our boundaries.
MONO_HANDLE_GET (chunkChars, chunk, chunkChars);
const int chunkOffset = MONO_HANDLE_GETVAL (chunk, chunkOffset);
g_assert (chunkOffset >= 0);
g_assertf ((chunkOffset + chunkLength) >= chunkLength, "integer overflow");
g_assertf (GINT_TO_UINT(chunkOffset + chunkLength) <= capacity, "A chunk in the StringBuilder had a length longer than expected from the offset.");