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Merge pull request #35208 from neikeq/mono-lazy-thread-attach

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Mono/C#: Script interface calls now attach the current thread
This commit is contained in:
Ignacio Roldán Etcheverry 2020-01-16 21:27:08 +01:00 committed by GitHub
commit 1191d26ddc
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GPG key ID: 4AEE18F83AFDEB23
3 changed files with 128 additions and 42 deletions
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110
modules/mono/csharp_script.cpp
View file

@ -559,6 +559,7 @@ Vector<ScriptLanguage::StackInfo> CSharpLanguage::debug_get_current_stack_info()
#ifdef DEBUG_ENABLED
_TLS_RECURSION_GUARD_V_(Vector<StackInfo>());
GD_MONO_SCOPE_THREAD_ATTACH;
if (!gdmono->is_runtime_initialized() || !GDMono::get_singleton()->get_core_api_assembly() || !GDMonoCache::cached_data.corlib_cache_updated)
return Vector<StackInfo>();
@ -583,6 +584,7 @@ Vector<ScriptLanguage::StackInfo> CSharpLanguage::debug_get_current_stack_info()
Vector<ScriptLanguage::StackInfo> CSharpLanguage::stack_trace_get_info(MonoObject *p_stack_trace) {
_TLS_RECURSION_GUARD_V_(Vector<StackInfo>());
GD_MONO_SCOPE_THREAD_ATTACH;
MonoException *exc = NULL;
@ -689,6 +691,7 @@ void CSharpLanguage::reload_all_scripts() {
#ifdef GD_MONO_HOT_RELOAD
if (is_assembly_reloading_needed()) {
GD_MONO_SCOPE_THREAD_ATTACH;
reload_assemblies(false);
}
#endif
@ -706,6 +709,7 @@ void CSharpLanguage::reload_tool_script(const Ref<Script> &p_script, bool p_soft
#ifdef GD_MONO_HOT_RELOAD
if (is_assembly_reloading_needed()) {
GD_MONO_SCOPE_THREAD_ATTACH;
reload_assemblies(p_soft_reload);
}
#endif
@ -1356,6 +1360,8 @@ void CSharpLanguage::free_instance_binding_data(void *p_data) {
if (finalizing)
return; // inside CSharpLanguage::finish(), all the gchandle bindings are released there
GD_MONO_ASSERT_THREAD_ATTACHED;
{
SCOPED_MUTEX_LOCK(language_bind_mutex);
@ -1382,6 +1388,7 @@ void CSharpLanguage::refcount_incremented_instance_binding(Object *p_object) {
#ifdef DEBUG_ENABLED
CRASH_COND(!ref_owner);
CRASH_COND(!p_object->has_script_instance_binding(get_language_index()));
#endif
void *data = p_object->get_script_instance_binding(get_language_index());
@ -1394,6 +1401,8 @@ void CSharpLanguage::refcount_incremented_instance_binding(Object *p_object) {
return;
if (ref_owner->reference_get_count() > 1 && gchandle->is_weak()) { // The managed side also holds a reference, hence 1 instead of 0
GD_MONO_SCOPE_THREAD_ATTACH;
// The reference count was increased after the managed side was the only one referencing our owner.
// This means the owner is being referenced again by the unmanaged side,
// so the owner must hold the managed side alive again to avoid it from being GCed.
@ -1415,6 +1424,7 @@ bool CSharpLanguage::refcount_decremented_instance_binding(Object *p_object) {
#ifdef DEBUG_ENABLED
CRASH_COND(!ref_owner);
CRASH_COND(!p_object->has_script_instance_binding(get_language_index()));
#endif
void *data = p_object->get_script_instance_binding(get_language_index());
@ -1429,6 +1439,8 @@ bool CSharpLanguage::refcount_decremented_instance_binding(Object *p_object) {
return refcount == 0;
if (refcount == 1 && gchandle.is_valid() && !gchandle->is_weak()) { // The managed side also holds a reference, hence 1 instead of 0
GD_MONO_SCOPE_THREAD_ATTACH;
// If owner owner is no longer referenced by the unmanaged side,
// the managed instance takes responsibility of deleting the owner when GCed.
@ -1480,6 +1492,8 @@ bool CSharpInstance::set(const StringName &p_name, const Variant &p_value) {
ERR_FAIL_COND_V(!script.is_valid(), false);
GD_MONO_SCOPE_THREAD_ATTACH;
MonoObject *mono_object = get_mono_object();
ERR_FAIL_NULL_V(mono_object, false);
@ -1532,6 +1546,8 @@ bool CSharpInstance::get(const StringName &p_name, Variant &r_ret) const {
ERR_FAIL_COND_V(!script.is_valid(), false);
GD_MONO_SCOPE_THREAD_ATTACH;
MonoObject *mono_object = get_mono_object();
ERR_FAIL_NULL_V(mono_object, false);
@ -1625,6 +1641,8 @@ void CSharpInstance::get_property_list(List<PropertyInfo> *p_properties) const {
ERR_FAIL_COND(!script.is_valid());
GD_MONO_SCOPE_THREAD_ATTACH;
MonoObject *mono_object = get_mono_object();
ERR_FAIL_NULL(mono_object);
@ -1669,6 +1687,8 @@ bool CSharpInstance::has_method(const StringName &p_method) const {
if (!script.is_valid())
return false;
GD_MONO_SCOPE_THREAD_ATTACH;
GDMonoClass *top = script->script_class;
while (top && top != script->native) {
@ -1684,6 +1704,11 @@ bool CSharpInstance::has_method(const StringName &p_method) const {
Variant CSharpInstance::call(const StringName &p_method, const Variant **p_args, int p_argcount, Variant::CallError &r_error) {
if (!script.is_valid())
ERR_FAIL_V(Variant());
GD_MONO_SCOPE_THREAD_ATTACH;
MonoObject *mono_object = get_mono_object();
if (!mono_object) {
@ -1691,9 +1716,6 @@ Variant CSharpInstance::call(const StringName &p_method, const Variant **p_args,
ERR_FAIL_V(Variant());
}
if (!script.is_valid())
ERR_FAIL_V(Variant());
GDMonoClass *top = script->script_class;
while (top && top != script->native) {
@ -1721,6 +1743,8 @@ Variant CSharpInstance::call(const StringName &p_method, const Variant **p_args,
void CSharpInstance::call_multilevel(const StringName &p_method, const Variant **p_args, int p_argcount) {
GD_MONO_SCOPE_THREAD_ATTACH;
if (script.is_valid()) {
MonoObject *mono_object = get_mono_object();
@ -1732,6 +1756,8 @@ void CSharpInstance::call_multilevel(const StringName &p_method, const Variant *
void CSharpInstance::_call_multilevel(MonoObject *p_mono_object, const StringName &p_method, const Variant **p_args, int p_argcount) {
GD_MONO_ASSERT_THREAD_ATTACHED;
GDMonoClass *top = script->script_class;
while (top && top != script->native) {
@ -1894,6 +1920,8 @@ void CSharpInstance::refcount_incremented() {
Reference *ref_owner = Object::cast_to<Reference>(owner);
if (ref_owner->reference_get_count() > 1 && gchandle->is_weak()) { // The managed side also holds a reference, hence 1 instead of 0
GD_MONO_SCOPE_THREAD_ATTACH;
// The reference count was increased after the managed side was the only one referencing our owner.
// This means the owner is being referenced again by the unmanaged side,
// so the owner must hold the managed side alive again to avoid it from being GCed.
@ -1917,6 +1945,8 @@ bool CSharpInstance::refcount_decremented() {
int refcount = ref_owner->reference_get_count();
if (refcount == 1 && !gchandle->is_weak()) { // The managed side also holds a reference, hence 1 instead of 0
GD_MONO_SCOPE_THREAD_ATTACH;
// If owner owner is no longer referenced by the unmanaged side,
// the managed instance takes responsibility of deleting the owner when GCed.
@ -1957,6 +1987,8 @@ MultiplayerAPI::RPCMode CSharpInstance::_member_get_rpc_mode(IMonoClassMember *p
MultiplayerAPI::RPCMode CSharpInstance::get_rpc_mode(const StringName &p_method) const {
GD_MONO_SCOPE_THREAD_ATTACH;
GDMonoClass *top = script->script_class;
while (top && top != script->native) {
@ -1973,6 +2005,8 @@ MultiplayerAPI::RPCMode CSharpInstance::get_rpc_mode(const StringName &p_method)
MultiplayerAPI::RPCMode CSharpInstance::get_rset_mode(const StringName &p_variable) const {
GD_MONO_SCOPE_THREAD_ATTACH;
GDMonoClass *top = script->script_class;
while (top && top != script->native) {
@ -1994,6 +2028,8 @@ MultiplayerAPI::RPCMode CSharpInstance::get_rset_mode(const StringName &p_variab
void CSharpInstance::notification(int p_notification) {
GD_MONO_SCOPE_THREAD_ATTACH;
if (p_notification == Object::NOTIFICATION_PREDELETE) {
// When NOTIFICATION_PREDELETE is sent, we also take the chance to call Dispose().
// It's safe to call Dispose() multiple times and NOTIFICATION_PREDELETE is guaranteed
@ -2031,6 +2067,8 @@ void CSharpInstance::notification(int p_notification) {
void CSharpInstance::_call_notification(int p_notification) {
GD_MONO_ASSERT_THREAD_ATTACHED;
MonoObject *mono_object = get_mono_object();
ERR_FAIL_NULL(mono_object);
@ -2055,6 +2093,8 @@ void CSharpInstance::_call_notification(int p_notification) {
}
String CSharpInstance::to_string(bool *r_valid) {
GD_MONO_SCOPE_THREAD_ATTACH;
MonoObject *mono_object = get_mono_object();
if (mono_object == NULL) {
@ -2103,6 +2143,8 @@ CSharpInstance::CSharpInstance() :
CSharpInstance::~CSharpInstance() {
GD_MONO_SCOPE_THREAD_ATTACH;
destructing_script_instance = true;
if (gchandle.is_valid()) {
@ -2206,6 +2248,8 @@ void CSharpScript::_update_exports_values(Map<StringName, Variant> &values, List
void CSharpScript::_update_member_info_no_exports() {
if (exports_invalidated) {
GD_MONO_ASSERT_THREAD_ATTACHED;
exports_invalidated = false;
member_info.clear();
@ -2264,6 +2308,8 @@ bool CSharpScript::_update_exports() {
bool changed = false;
if (exports_invalidated) {
GD_MONO_SCOPE_THREAD_ATTACH;
exports_invalidated = false;
changed = true;
@ -2413,6 +2459,8 @@ void CSharpScript::load_script_signals(GDMonoClass *p_class, GDMonoClass *p_nati
// make sure this classes signals are empty when loading for the first time
_signals.clear();
GD_MONO_SCOPE_THREAD_ATTACH;
GDMonoClass *top = p_class;
while (top && top != p_native_class) {
const Vector<GDMonoClass *> &delegates = top->get_all_delegates();
@ -2433,6 +2481,8 @@ void CSharpScript::load_script_signals(GDMonoClass *p_class, GDMonoClass *p_nati
}
bool CSharpScript::_get_signal(GDMonoClass *p_class, GDMonoClass *p_delegate, Vector<Argument> &params) {
GD_MONO_ASSERT_THREAD_ATTACHED;
if (p_delegate->has_attribute(CACHED_CLASS(SignalAttribute))) {
MonoType *raw_type = p_delegate->get_mono_type();
@ -2474,6 +2524,8 @@ bool CSharpScript::_get_signal(GDMonoClass *p_class, GDMonoClass *p_delegate, Ve
*/
bool CSharpScript::_get_member_export(IMonoClassMember *p_member, bool p_inspect_export, PropertyInfo &r_prop_info, bool &r_exported) {
GD_MONO_ASSERT_THREAD_ATTACHED;
// Goddammit, C++. All I wanted was some nested functions.
#define MEMBER_FULL_QUALIFIED_NAME(m_member) \
(m_member->get_enclosing_class()->get_full_name() + "." + (String)m_member->get_name())
@ -2552,6 +2604,8 @@ bool CSharpScript::_get_member_export(IMonoClassMember *p_member, bool p_inspect
int CSharpScript::_try_get_member_export_hint(IMonoClassMember *p_member, ManagedType p_type, Variant::Type p_variant_type, bool p_allow_generics, PropertyHint &r_hint, String &r_hint_string) {
GD_MONO_ASSERT_THREAD_ATTACHED;
if (p_variant_type == Variant::INT && p_type.type_encoding == MONO_TYPE_VALUETYPE && mono_class_is_enum(p_type.type_class->get_mono_ptr())) {
r_hint = PROPERTY_HINT_ENUM;
@ -2661,6 +2715,8 @@ Variant CSharpScript::call(const StringName &p_method, const Variant **p_args, i
return Variant();
}
GD_MONO_SCOPE_THREAD_ATTACH;
GDMonoClass *top = script_class;
while (top && top != native) {
@ -2853,6 +2909,8 @@ StringName CSharpScript::get_instance_base_type() const {
CSharpInstance *CSharpScript::_create_instance(const Variant **p_args, int p_argcount, Object *p_owner, bool p_isref, Variant::CallError &r_error) {
GD_MONO_ASSERT_THREAD_ATTACHED;
/* STEP 1, CREATE */
// Search the constructor first, to fail with an error if it's not found before allocating anything else.
@ -2947,12 +3005,14 @@ Variant CSharpScript::_new(const Variant **p_args, int p_argcount, Variant::Call
}
r_error.error = Variant::CallError::CALL_OK;
REF ref;
ERR_FAIL_NULL_V(native, Variant());
GD_MONO_SCOPE_THREAD_ATTACH;
Object *owner = ClassDB::instance(NATIVE_GDMONOCLASS_NAME(native));
REF ref;
Reference *r = Object::cast_to<Reference>(owner);
if (r) {
ref = REF(r);
@ -2990,6 +3050,8 @@ ScriptInstance *CSharpScript::instance_create(Object *p_this) {
}
}
GD_MONO_SCOPE_THREAD_ATTACH;
Variant::CallError unchecked_error;
return _create_instance(NULL, 0, p_this, Object::cast_to<Reference>(p_this) != NULL, unchecked_error);
}
@ -3037,6 +3099,8 @@ void CSharpScript::get_script_method_list(List<MethodInfo> *p_list) const {
if (!script_class)
return;
GD_MONO_SCOPE_THREAD_ATTACH;
// TODO: Filter out things unsuitable for explicit calls, like constructors.
const Vector<GDMonoMethod *> &methods = script_class->get_all_methods();
for (int i = 0; i < methods.size(); ++i) {
@ -3049,6 +3113,8 @@ bool CSharpScript::has_method(const StringName &p_method) const {
if (!script_class)
return false;
GD_MONO_SCOPE_THREAD_ATTACH;
return script_class->has_fetched_method_unknown_params(p_method);
}
@ -3057,6 +3123,8 @@ MethodInfo CSharpScript::get_method_info(const StringName &p_method) const {
if (!script_class)
return MethodInfo();
GD_MONO_SCOPE_THREAD_ATTACH;
GDMonoClass *top = script_class;
while (top && top != native) {
@ -3081,6 +3149,8 @@ Error CSharpScript::reload(bool p_keep_state) {
ERR_FAIL_COND_V(!p_keep_state && has_instances, ERR_ALREADY_IN_USE);
GD_MONO_SCOPE_THREAD_ATTACH;
GDMonoAssembly *project_assembly = GDMono::get_singleton()->get_project_assembly();
if (project_assembly) {
@ -3308,39 +3378,7 @@ RES ResourceFormatLoaderCSharpScript::load(const String &p_path, const String &p
script->set_path(p_original_path);
#ifndef TOOLS_ENABLED
#ifdef DEBUG_ENABLED
// User is responsible for thread attach/detach
CRASH_COND_MSG(mono_domain_get() == NULL, "Thread is not attached.");
#endif
#endif
#ifdef TOOLS_ENABLED
MonoDomain *domain = mono_domain_get();
if (Engine::get_singleton()->is_editor_hint() && domain == NULL) {
CRASH_COND(Thread::get_caller_id() == Thread::get_main_id());
// Thread is not attached, but we will make an exception in this case
// because this may be called by one of the editor's worker threads.
// Attach this thread temporarily to reload the script.
if (domain) {
MonoThread *mono_thread = mono_thread_attach(domain);
CRASH_COND(mono_thread == NULL);
script->reload();
mono_thread_detach(mono_thread);
}
} else { // just reload it normally
#endif
script->reload();
#ifdef TOOLS_ENABLED
}
#endif
if (r_error)
*r_error = OK;

35
modules/mono/mono_gd/gd_mono_utils.cpp
View file

@ -125,10 +125,12 @@ void set_main_thread(MonoThread *p_thread) {
mono_thread_set_main(p_thread);
}
void attach_current_thread() {
ERR_FAIL_COND(!GDMono::get_singleton()->is_runtime_initialized());
MonoThread *mono_thread = mono_thread_attach(mono_get_root_domain());
ERR_FAIL_NULL(mono_thread);
MonoThread *attach_current_thread() {
ERR_FAIL_COND_V(!GDMono::get_singleton()->is_runtime_initialized(), NULL);
MonoDomain *scripts_domain = GDMono::get_singleton()->get_scripts_domain();
MonoThread *mono_thread = mono_thread_attach(scripts_domain ? scripts_domain : mono_get_root_domain());
ERR_FAIL_NULL_V(mono_thread, NULL);
return mono_thread;
}
void detach_current_thread() {
@ -138,10 +140,20 @@ void detach_current_thread() {
mono_thread_detach(mono_thread);
}
void detach_current_thread(MonoThread *p_mono_thread) {
ERR_FAIL_COND(!GDMono::get_singleton()->is_runtime_initialized());
ERR_FAIL_NULL(p_mono_thread);
mono_thread_detach(p_mono_thread);
}
MonoThread *get_current_thread() {
return mono_thread_current();
}
bool is_thread_attached() {
return mono_domain_get() != NULL;
}
void runtime_object_init(MonoObject *p_this_obj, GDMonoClass *p_class, MonoException **r_exc) {
GDMonoMethod *ctor = p_class->get_method(".ctor", 0);
ERR_FAIL_NULL(ctor);
@ -617,4 +629,19 @@ GDMonoClass *make_generic_dictionary_type(MonoReflectionType *p_key_reftype, Mon
} // namespace Marshal
ScopeThreadAttach::ScopeThreadAttach() :
mono_thread(NULL) {
if (likely(GDMono::get_singleton()->is_runtime_initialized()) && unlikely(!mono_domain_get())) {
mono_thread = GDMonoUtils::attach_current_thread();
}
}
ScopeThreadAttach::~ScopeThreadAttach() {
if (unlikely(mono_thread)) {
GDMonoUtils::detach_current_thread(mono_thread);
}
}
// namespace Marshal
} // namespace GDMonoUtils

23
modules/mono/mono_gd/gd_mono_utils.h
View file

@ -83,9 +83,11 @@ _FORCE_INLINE_ void hash_combine(uint32_t &p_hash, const uint32_t &p_with_hash)
MonoObject *unmanaged_get_managed(Object *unmanaged);
void set_main_thread(MonoThread *p_thread);
void attach_current_thread();
MonoThread *attach_current_thread();
void detach_current_thread();
void detach_current_thread(MonoThread *p_mono_thread);
MonoThread *get_current_thread();
bool is_thread_attached();
_FORCE_INLINE_ bool is_main_thread() {
return mono_domain_get() != NULL && mono_thread_get_main() == mono_thread_current();
@ -142,6 +144,14 @@ uint64_t unbox_enum_value(MonoObject *p_boxed, MonoType *p_enum_basetype, bool &
void dispose(MonoObject *p_mono_object, MonoException **r_exc);
struct ScopeThreadAttach {
ScopeThreadAttach();
~ScopeThreadAttach();
private:
MonoThread *mono_thread;
};
} // namespace GDMonoUtils
#define NATIVE_GDMONOCLASS_NAME(m_class) (GDMonoMarshal::mono_string_to_godot((MonoString *)m_class->get_field(BINDINGS_NATIVE_NAME_FIELD)->get_value(NULL)))
@ -153,4 +163,15 @@ void dispose(MonoObject *p_mono_object, MonoException **r_exc);
#define GD_MONO_END_RUNTIME_INVOKE \
_runtime_invoke_count_ref -= 1;
#define GD_MONO_SCOPE_THREAD_ATTACH \
GDMonoUtils::ScopeThreadAttach __gdmono__scope__thread__attach__; \
(void)__gdmono__scope__thread__attach__;
#ifdef DEBUG_ENABLED
#define GD_MONO_ASSERT_THREAD_ATTACHED \
{ CRASH_COND(!GDMonoUtils::is_thread_attached()); }
#else
#define GD_MONO_ASSERT_THREAD_ATTACHED
#endif
#endif // GD_MONOUTILS_H