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227 | /**************************************************************************/
/* gd_mono_internals.cpp */
/**************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/**************************************************************************/
/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. */
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/**************************************************************************/
#include "gd_mono_internals.h"
#include "../csharp_script.h"
#include "../mono_gc_handle.h"
#include "../utils/macros.h"
#include "../utils/thread_local.h"
#include "gd_mono_class.h"
#include "gd_mono_marshal.h"
#include "gd_mono_utils.h"
#include <mono/metadata/exception.h>
namespace GDMonoInternals {
void tie_managed_to_unmanaged(MonoObject *managed, Object *unmanaged) {
// This method should not fail
CRASH_COND(!unmanaged);
// All mono objects created from the managed world (e.g.: 'new Player()')
// need to have a CSharpScript in order for their methods to be callable from the unmanaged side
Reference *ref = Object::cast_to<Reference>(unmanaged);
GDMonoClass *klass = GDMonoUtils::get_object_class(managed);
CRASH_COND(!klass);
GDMonoClass *native = GDMonoUtils::get_class_native_base(klass);
CRASH_COND(native == NULL);
if (native == klass) {
// If it's just a wrapper Godot class and not a custom inheriting class, then attach a
// script binding instead. One of the advantages of this is that if a script is attached
// later and it's not a C# script, then the managed object won't have to be disposed.
// Another reason for doing this is that this instance could outlive CSharpLanguage, which would
// be problematic when using a script. See: https://github.com/godotengine/godot/issues/25621
CSharpScriptBinding script_binding;
script_binding.inited = true;
script_binding.type_name = NATIVE_GDMONOCLASS_NAME(klass);
script_binding.wrapper_class = klass;
script_binding.gchandle = ref ? MonoGCHandle::create_weak(managed) : MonoGCHandle::create_strong(managed);
script_binding.owner = unmanaged;
if (ref) {
// Unsafe refcount increment. The managed instance also counts as a reference.
// This way if the unmanaged world has no references to our owner
// but the managed instance is alive, the refcount will be 1 instead of 0.
// See: godot_icall_Reference_Dtor(MonoObject *p_obj, Object *p_ptr)
// May not me referenced yet, so we must use init_ref() instead of reference()
if (ref->init_ref()) {
CSharpLanguage::get_singleton()->post_unsafe_reference(ref);
}
}
// The object was just created, no script instance binding should have been attached
CRASH_COND(unmanaged->has_script_instance_binding(CSharpLanguage::get_singleton()->get_language_index()));
void *data;
{
MutexLock lock(CSharpLanguage::get_singleton()->get_language_bind_mutex());
data = (void *)CSharpLanguage::get_singleton()->insert_script_binding(unmanaged, script_binding);
}
// Should be thread safe because the object was just created and nothing else should be referencing it
unmanaged->set_script_instance_binding(CSharpLanguage::get_singleton()->get_language_index(), data);
return;
}
Ref<MonoGCHandle> gchandle = ref ? MonoGCHandle::create_weak(managed) : MonoGCHandle::create_strong(managed);
Ref<CSharpScript> script = CSharpScript::create_for_managed_type(klass, native);
CRASH_COND(script.is_null());
ScriptInstance *si = CSharpInstance::create_for_managed_type(unmanaged, script.ptr(), gchandle);
unmanaged->set_script_and_instance(script.get_ref_ptr(), si);
}
void unhandled_exception(MonoException *p_exc) {
mono_print_unhandled_exception((MonoObject *)p_exc);
gd_unhandled_exception_event(p_exc);
if (GDMono::get_singleton()->get_unhandled_exception_policy() == GDMono::POLICY_TERMINATE_APP) {
// Too bad 'mono_invoke_unhandled_exception_hook' is not exposed to embedders
mono_unhandled_exception((MonoObject *)p_exc);
GDMono::unhandled_exception_hook((MonoObject *)p_exc, NULL);
GD_UNREACHABLE();<--- Statements following return, break, continue, goto or throw will never be executed.
} else {
#ifdef DEBUG_ENABLED
GDMonoUtils::debug_send_unhandled_exception_error((MonoException *)p_exc);
if (ScriptDebugger::get_singleton())
ScriptDebugger::get_singleton()->idle_poll();
#endif
}
}
void gd_unhandled_exception_event(MonoException *p_exc) {
MonoImage *mono_image = GDMono::get_singleton()->get_core_api_assembly()->get_image();
MonoClass *gd_klass = mono_class_from_name(mono_image, "Godot", "GD");
MonoMethod *unhandled_exception_method = mono_class_get_method_from_name(gd_klass, "OnUnhandledException", -1);
void *args[1];
args[0] = p_exc;
mono_runtime_invoke(unhandled_exception_method, nullptr, (void **)args, nullptr);
}
#ifdef DEBUG_ENABLED
static String _get_var_type(const Variant *p_var) {
String basestr;
if (p_var->get_type() == Variant::OBJECT) {
Object *bobj = *p_var;
if (!bobj) {
if (p_var->is_invalid_object()) {
basestr = "previously freed instance";
} else {
basestr = "null instance";
}
} else {
if (bobj->get_script_instance()) {
basestr = bobj->get_class() + " (" + bobj->get_script_instance()->get_script()->get_path().get_file() + ")";
} else {
basestr = bobj->get_class();
}
}
} else {
basestr = Variant::get_type_name(p_var->get_type());
}
return basestr;
}
static String _get_call_where(const String &p_method, const Variant *p_instance, const Variant **argptrs, int argc) {
String methodstr = p_method;
String basestr = _get_var_type(p_instance);
if (methodstr == "call") {
if (argc >= 1) {
methodstr = String(*argptrs[0]) + " (via call)";
}
} else if (methodstr == "call_recursive" && basestr == "TreeItem") {
if (argc >= 1) {
methodstr = String(*argptrs[0]) + " (via TreeItem.call_recursive)";
}
}
return "function '" + methodstr + "' in base '" + basestr + "'";
}
static String _get_call_error(const Variant::CallError &p_err, const String &p_where, const Variant **argptrs) {
String err_text;
if (p_err.error == Variant::CallError::CALL_ERROR_INVALID_ARGUMENT) {
int errorarg = p_err.argument;
// Handle the Object to Object case separately as we don't have further class details.
#ifdef DEBUG_ENABLED
if (p_err.expected == Variant::OBJECT && argptrs[errorarg]->get_type() == p_err.expected) {
err_text = "Invalid type in " + p_where + ". The Object-derived class of argument " + itos(errorarg + 1) + " (" + _get_var_type(argptrs[errorarg]) + ") is not a subclass of the expected argument class.";
} else
#endif // DEBUG_ENABLED
{
err_text = "Invalid type in " + p_where + ". Cannot convert argument " + itos(errorarg + 1) + " from " + Variant::get_type_name(argptrs[errorarg]->get_type()) + " to " + Variant::get_type_name(p_err.expected) + ".";
}
} else if (p_err.error == Variant::CallError::CALL_ERROR_TOO_MANY_ARGUMENTS) {
err_text = "Invalid call to " + p_where + ". Expected " + itos(p_err.argument) + " arguments.";
} else if (p_err.error == Variant::CallError::CALL_ERROR_TOO_FEW_ARGUMENTS) {
err_text = "Invalid call to " + p_where + ". Expected " + itos(p_err.argument) + " arguments.";
} else if (p_err.error == Variant::CallError::CALL_ERROR_INVALID_METHOD) {
err_text = "Invalid call. Nonexistent " + p_where + ".";
} else if (p_err.error == Variant::CallError::CALL_ERROR_INSTANCE_IS_NULL) {
err_text = "Attempt to call " + p_where + " on a null instance.";
} else {
err_text = "Bug, call error: #" + itos(p_err.error);
}
return err_text;
}
void check_call_error(const String &p_method, const Variant *p_instance, const Variant **p_args, int p_arg_count, const Variant::CallError &p_error) {
if (p_error.error == Variant::CallError::CALL_OK) {
// The call was successful.
return;
}
const String &where = _get_call_where(p_method, p_instance, p_args, p_arg_count);
ERR_PRINT(_get_call_error(p_error, where, p_args));
}
#else
void check_call_error(const String &p_method, const Variant &p_instance, const Variant **p_args, int p_arg_count, const Variant::CallError &p_error) {}
#endif
} // namespace GDMonoInternals
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