mono/mono_gd/gd_mono_assembly.cpp

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2023-05-23 17:54:30 +02:00
/**************************************************************************/
/* gd_mono_assembly.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_assembly.h"
#include <mono/metadata/mono-debug.h>
#include <mono/metadata/tokentype.h>
#include "core/io/file_access_pack.h"
#include "core/list.h"
#include "core/os/file_access.h"
#include "core/os/os.h"
#include "core/project_settings.h"
#include "../godotsharp_dirs.h"
#include "gd_mono_cache.h"
#include "gd_mono_class.h"
Vector<String> GDMonoAssembly::search_dirs;
void GDMonoAssembly::fill_search_dirs(Vector<String> &r_search_dirs, const String &p_custom_config, const String &p_custom_bcl_dir) {
String framework_dir;
if (!p_custom_bcl_dir.empty()) {
framework_dir = p_custom_bcl_dir;
} else if (mono_assembly_getrootdir()) {
framework_dir = String::utf8(mono_assembly_getrootdir()).plus_file("mono").plus_file("4.5");
}
if (!framework_dir.empty()) {
r_search_dirs.push_back(framework_dir);
r_search_dirs.push_back(framework_dir.plus_file("Facades"));
}
#if !defined(TOOLS_ENABLED)
String data_game_assemblies_dir = GodotSharpDirs::get_data_game_assemblies_dir();
if (!data_game_assemblies_dir.empty()) {
r_search_dirs.push_back(data_game_assemblies_dir);
}
#endif
if (p_custom_config.length()) {
r_search_dirs.push_back(GodotSharpDirs::get_res_temp_assemblies_base_dir().plus_file(p_custom_config));
} else {
r_search_dirs.push_back(GodotSharpDirs::get_res_temp_assemblies_dir());
}
if (p_custom_config.empty()) {
r_search_dirs.push_back(GodotSharpDirs::get_res_assemblies_dir());
} else {
String api_config = p_custom_config == "ExportRelease" ? "Release" : "Debug";
r_search_dirs.push_back(GodotSharpDirs::get_res_assemblies_base_dir().plus_file(api_config));
}
r_search_dirs.push_back(GodotSharpDirs::get_res_assemblies_base_dir());
r_search_dirs.push_back(OS::get_singleton()->get_resource_dir());
r_search_dirs.push_back(OS::get_singleton()->get_executable_path().get_base_dir());
#ifdef TOOLS_ENABLED
r_search_dirs.push_back(GodotSharpDirs::get_data_editor_tools_dir());
// For GodotTools to find the api assemblies
r_search_dirs.push_back(GodotSharpDirs::get_data_editor_prebuilt_api_dir().plus_file("Debug"));
#endif
}
// This is how these assembly loading hooks work:
//
// - The 'search' hook checks if the assembly has already been loaded, to avoid loading again.
// - The 'preload' hook does the actual loading and is only called if the
// 'search' hook didn't find the assembly in the list of loaded assemblies.
// - The 'load' hook is called after the assembly has been loaded. Its job is to add the
// assembly to the list of loaded assemblies so that the 'search' hook can look it up.
void GDMonoAssembly::assembly_load_hook(MonoAssembly *assembly, void *user_data) {
String name = String::utf8(mono_assembly_name_get_name(mono_assembly_get_name(assembly)));
MonoImage *image = mono_assembly_get_image(assembly);
GDMonoAssembly *gdassembly = memnew(GDMonoAssembly(name, image, assembly));
#ifdef GD_MONO_HOT_RELOAD
String path = String::utf8(mono_image_get_filename(image));
if (FileAccess::exists(path))
gdassembly->modified_time = FileAccess::get_modified_time(path);
#endif
MonoDomain *domain = mono_domain_get();
GDMono::get_singleton()->add_assembly(domain ? mono_domain_get_id(domain) : 0, gdassembly);
}
MonoAssembly *GDMonoAssembly::assembly_search_hook(MonoAssemblyName *aname, void *user_data) {
return GDMonoAssembly::_search_hook(aname, user_data, false);
}
MonoAssembly *GDMonoAssembly::assembly_refonly_search_hook(MonoAssemblyName *aname, void *user_data) {
return GDMonoAssembly::_search_hook(aname, user_data, true);
}
MonoAssembly *GDMonoAssembly::assembly_preload_hook(MonoAssemblyName *aname, char **assemblies_path, void *user_data) {
return GDMonoAssembly::_preload_hook(aname, assemblies_path, user_data, false);
}
MonoAssembly *GDMonoAssembly::assembly_refonly_preload_hook(MonoAssemblyName *aname, char **assemblies_path, void *user_data) {
return GDMonoAssembly::_preload_hook(aname, assemblies_path, user_data, true);
}
MonoAssembly *GDMonoAssembly::_search_hook(MonoAssemblyName *aname, void *user_data, bool refonly) {
String name = String::utf8(mono_assembly_name_get_name(aname));
bool has_extension = name.ends_with(".dll") || name.ends_with(".exe");
GDMonoAssembly *loaded_asm = GDMono::get_singleton()->get_loaded_assembly(has_extension ? name.get_basename() : name);
if (loaded_asm)
return loaded_asm->get_assembly();
return NULL;
}
MonoAssembly *GDMonoAssembly::_preload_hook(MonoAssemblyName *aname, char **, void *user_data, bool refonly) {
String name = String::utf8(mono_assembly_name_get_name(aname));
return _load_assembly_search(name, aname, refonly, search_dirs);
}
MonoAssembly *GDMonoAssembly::_load_assembly_search(const String &p_name, MonoAssemblyName *p_aname, bool p_refonly, const Vector<String> &p_search_dirs) {
MonoAssembly *res = NULL;
String path;
bool has_extension = p_name.ends_with(".dll") || p_name.ends_with(".exe");
for (int i = 0; i < p_search_dirs.size(); i++) {
const String &search_dir = p_search_dirs[i];
if (has_extension) {
path = search_dir.plus_file(p_name);
if (FileAccess::exists(path)) {
res = _real_load_assembly_from(path, p_refonly, p_aname);
if (res != NULL)
return res;
}
} else {
path = search_dir.plus_file(p_name + ".dll");
if (FileAccess::exists(path)) {
res = _real_load_assembly_from(path, p_refonly, p_aname);
if (res != NULL)
return res;
}
path = search_dir.plus_file(p_name + ".exe");
if (FileAccess::exists(path)) {
res = _real_load_assembly_from(path, p_refonly, p_aname);
if (res != NULL)
return res;
}
}
}
return NULL;
}
String GDMonoAssembly::find_assembly(const String &p_name) {
String path;
bool has_extension = p_name.ends_with(".dll") || p_name.ends_with(".exe");
for (int i = 0; i < search_dirs.size(); i++) {
const String &search_dir = search_dirs[i];
if (has_extension) {
path = search_dir.plus_file(p_name);
if (FileAccess::exists(path))
return path;
} else {
path = search_dir.plus_file(p_name + ".dll");
if (FileAccess::exists(path))
return path;
path = search_dir.plus_file(p_name + ".exe");
if (FileAccess::exists(path))
return path;
}
}
return String();
}
void GDMonoAssembly::initialize() {
fill_search_dirs(search_dirs);
mono_install_assembly_search_hook(&assembly_search_hook, NULL);
mono_install_assembly_refonly_search_hook(&assembly_refonly_search_hook, NULL);
mono_install_assembly_preload_hook(&assembly_preload_hook, NULL);
mono_install_assembly_refonly_preload_hook(&assembly_refonly_preload_hook, NULL);
mono_install_assembly_load_hook(&assembly_load_hook, NULL);
}
MonoAssembly *GDMonoAssembly::_real_load_assembly_from(const String &p_path, bool p_refonly, MonoAssemblyName *p_aname) {
Vector<uint8_t> data = FileAccess::get_file_as_array(p_path);
ERR_FAIL_COND_V_MSG(data.empty(), NULL, "Could read the assembly in the specified location");
String image_filename;
#ifdef ANDROID_ENABLED
if (p_path.begins_with("res://")) {
image_filename = p_path.substr(6, p_path.length());
} else {
image_filename = ProjectSettings::get_singleton()->globalize_path(p_path);
}
#else
// FIXME: globalize_path does not work on exported games
image_filename = ProjectSettings::get_singleton()->globalize_path(p_path);
#endif
MonoImageOpenStatus status = MONO_IMAGE_OK;
MonoImage *image = mono_image_open_from_data_with_name(
(char *)&data[0], data.size(),
true, &status, p_refonly,
image_filename.utf8());
ERR_FAIL_COND_V_MSG(status != MONO_IMAGE_OK || !image, NULL, "Failed to open assembly image from memory: '" + p_path + "'.");
if (p_aname != nullptr) {
// Check assembly version
const MonoTableInfo *table = mono_image_get_table_info(image, MONO_TABLE_ASSEMBLY);
ERR_FAIL_NULL_V(table, nullptr);
if (mono_table_info_get_rows(table)) {
uint32_t cols[MONO_ASSEMBLY_SIZE];
mono_metadata_decode_row(table, 0, cols, MONO_ASSEMBLY_SIZE);
// Not sure about .NET's policy. We will only ensure major and minor are equal, and ignore build and revision.
uint16_t major = cols[MONO_ASSEMBLY_MAJOR_VERSION];
uint16_t minor = cols[MONO_ASSEMBLY_MINOR_VERSION];
uint16_t required_minor;
uint16_t required_major = mono_assembly_name_get_version(p_aname, &required_minor, nullptr, nullptr);
if (required_major != 0) {
if (major != required_major && minor != required_minor) {
mono_image_close(image);
return nullptr;
}
}
}
}
#ifdef DEBUG_ENABLED
Vector<uint8_t> pdb_data;
String pdb_path(p_path + ".pdb");
if (!FileAccess::exists(pdb_path)) {
pdb_path = p_path.get_basename() + ".pdb"; // without .dll
if (!FileAccess::exists(pdb_path))
goto no_pdb;
}
pdb_data = FileAccess::get_file_as_array(pdb_path);
// mono_debug_close_image doesn't seem to be needed
mono_debug_open_image_from_memory(image, &pdb_data[0], pdb_data.size());
no_pdb:
#endif
bool need_manual_load_hook = mono_image_get_assembly(image) != nullptr; // Re-using an existing image with an assembly loaded
status = MONO_IMAGE_OK;
MonoAssembly *assembly = mono_assembly_load_from_full(image, image_filename.utf8().get_data(), &status, p_refonly);
ERR_FAIL_COND_V_MSG(status != MONO_IMAGE_OK || !assembly, nullptr, "Failed to load assembly for image");
if (need_manual_load_hook) {
// For some reason if an assembly survived domain reloading (maybe because it's referenced somewhere else),
// the mono internal search hook don't detect it, yet mono_image_open_from_data_with_name re-uses the image
// and assembly, and mono_assembly_load_from_full doesn't call the load hook. We need to call it manually.
String name = String::utf8(mono_assembly_name_get_name(mono_assembly_get_name(assembly)));
bool has_extension = name.ends_with(".dll") || name.ends_with(".exe");
GDMonoAssembly *loaded_asm = GDMono::get_singleton()->get_loaded_assembly(has_extension ? name.get_basename() : name);
if (!loaded_asm)
assembly_load_hook(assembly, nullptr);
}
// Decrement refcount which was previously incremented by mono_image_open_from_data_with_name
mono_image_close(image);
return assembly;
}
void GDMonoAssembly::unload() {
ERR_FAIL_NULL(image); // Should not be called if already unloaded
for (Map<MonoClass *, GDMonoClass *>::Element *E = cached_raw.front(); E; E = E->next()) {
memdelete(E->value());
}
cached_classes.clear();
cached_raw.clear();
assembly = NULL;
image = NULL;
}
String GDMonoAssembly::get_path() const {
return String::utf8(mono_image_get_filename(image));
}
GDMonoClass *GDMonoAssembly::get_class(const StringName &p_namespace, const StringName &p_name) {
ERR_FAIL_NULL_V(image, NULL);
ClassKey key(p_namespace, p_name);
GDMonoClass **match = cached_classes.getptr(key);
if (match)
return *match;
MonoClass *mono_class = mono_class_from_name(image, String(p_namespace).utf8(), String(p_name).utf8());
if (!mono_class)
return NULL;
GDMonoClass *wrapped_class = memnew(GDMonoClass(p_namespace, p_name, mono_class, this));
cached_classes[key] = wrapped_class;
cached_raw[mono_class] = wrapped_class;
return wrapped_class;
}
GDMonoClass *GDMonoAssembly::get_class(MonoClass *p_mono_class) {
ERR_FAIL_NULL_V(image, NULL);
Map<MonoClass *, GDMonoClass *>::Element *match = cached_raw.find(p_mono_class);
if (match)
return match->value();
StringName namespace_name = String::utf8(mono_class_get_namespace(p_mono_class));
StringName class_name = String::utf8(mono_class_get_name(p_mono_class));
GDMonoClass *wrapped_class = memnew(GDMonoClass(namespace_name, class_name, p_mono_class, this));
cached_classes[ClassKey(namespace_name, class_name)] = wrapped_class;
cached_raw[p_mono_class] = wrapped_class;
return wrapped_class;
}
GDMonoClass *GDMonoAssembly::get_object_derived_class(const StringName &p_class) {
GDMonoClass *match = NULL;
if (gdobject_class_cache_updated) {
Map<StringName, GDMonoClass *>::Element *result = gdobject_class_cache.find(p_class);
if (result)
match = result->get();
} else {
List<GDMonoClass *> nested_classes;
int rows = mono_image_get_table_rows(image, MONO_TABLE_TYPEDEF);
for (int i = 1; i < rows; i++) {
MonoClass *mono_class = mono_class_get(image, (i + 1) | MONO_TOKEN_TYPE_DEF);
if (!mono_class_is_assignable_from(CACHED_CLASS_RAW(GodotObject), mono_class))
continue;
GDMonoClass *current = get_class(mono_class);
if (!current)
continue;
nested_classes.push_back(current);
if (!match && current->get_name() == p_class)
match = current;
while (!nested_classes.empty()) {
GDMonoClass *current_nested = nested_classes.front()->get();
nested_classes.pop_front();
void *iter = NULL;
while (true) {
MonoClass *raw_nested = mono_class_get_nested_types(current_nested->get_mono_ptr(), &iter);
if (!raw_nested)
break;
GDMonoClass *nested_class = get_class(raw_nested);
if (nested_class) {
gdobject_class_cache.insert(nested_class->get_name(), nested_class);
nested_classes.push_back(nested_class);
}
}
}
gdobject_class_cache.insert(current->get_name(), current);
}
gdobject_class_cache_updated = true;
}
return match;
}
GDMonoAssembly *GDMonoAssembly::load(const String &p_name, MonoAssemblyName *p_aname, bool p_refonly, const Vector<String> &p_search_dirs) {
if (GDMono::get_singleton()->get_corlib_assembly() && (p_name == "mscorlib" || p_name == "mscorlib.dll"))
return GDMono::get_singleton()->get_corlib_assembly();
// We need to manually call the search hook in this case, as it won't be called in the next step
MonoAssembly *assembly = mono_assembly_invoke_search_hook(p_aname);
if (!assembly) {
assembly = _load_assembly_search(p_name, p_aname, p_refonly, p_search_dirs);
if (!assembly) {
return nullptr;
}
}
GDMonoAssembly *loaded_asm = GDMono::get_singleton()->get_loaded_assembly(p_name);
ERR_FAIL_NULL_V_MSG(loaded_asm, nullptr, "Loaded assembly missing from table. Did we not receive the load hook?");
ERR_FAIL_COND_V(loaded_asm->get_assembly() != assembly, nullptr);
return loaded_asm;
}
GDMonoAssembly *GDMonoAssembly::load_from(const String &p_name, const String &p_path, bool p_refonly) {
if (p_name == "mscorlib" || p_name == "mscorlib.dll")
return GDMono::get_singleton()->get_corlib_assembly();
// We need to manually call the search hook in this case, as it won't be called in the next step
MonoAssemblyName *aname = mono_assembly_name_new(p_name.utf8());
MonoAssembly *assembly = mono_assembly_invoke_search_hook(aname);
mono_assembly_name_free(aname);
mono_free(aname);
if (!assembly) {
assembly = _real_load_assembly_from(p_path, p_refonly);
if (!assembly) {
return nullptr;
}
}
GDMonoAssembly *loaded_asm = GDMono::get_singleton()->get_loaded_assembly(p_name);
ERR_FAIL_NULL_V_MSG(loaded_asm, NULL, "Loaded assembly missing from table. Did we not receive the load hook?");
return loaded_asm;
}
GDMonoAssembly::GDMonoAssembly(const String &p_name, MonoImage *p_image, MonoAssembly *p_assembly) :
name(p_name),
image(p_image),
assembly(p_assembly),
#ifdef GD_MONO_HOT_RELOAD
modified_time(0),
#endif
gdobject_class_cache_updated(false) {
}
GDMonoAssembly::~GDMonoAssembly() {
if (image)
unload();
}