godot/modules/mono/mono_gd/gd_mono_assembly.cpp
Ignacio Etcheverry e9e7aab8eb Mono: Some assembly referencing changes and cleanup
Apparently we don't need to call mono_debug_close_image ourselves and we can call mono_image_close right away as it's not our duty to keep that reference.
2019-03-10 18:55:31 +01:00

485 lines
15 KiB
C++

/*************************************************************************/
/* gd_mono_assembly.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
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/* Copyright (c) 2007-2019 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2019 Godot Engine contributors (cf. AUTHORS.md) */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
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/* 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: */
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/* The above copyright notice and this permission notice shall be */
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/* 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.*/
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/*************************************************************************/
#include "gd_mono_assembly.h"
#include <mono/metadata/mono-debug.h>
#include <mono/metadata/tokentype.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_class.h"
bool GDMonoAssembly::no_search = false;
bool GDMonoAssembly::in_preload = false;
Vector<String> GDMonoAssembly::search_dirs;
void GDMonoAssembly::fill_search_dirs(Vector<String> &r_search_dirs, const String &p_custom_config) {
const char *rootdir = mono_assembly_getrootdir();
if (rootdir) {
String framework_dir = String::utf8(rootdir).plus_file("mono").plus_file("4.5");
r_search_dirs.push_back(framework_dir);
r_search_dirs.push_back(framework_dir.plus_file("Facades"));
}
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());
}
r_search_dirs.push_back(GodotSharpDirs::get_res_assemblies_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());
#endif
}
void GDMonoAssembly::assembly_load_hook(MonoAssembly *assembly, void *user_data) {
if (no_search)
return;
// If our search and preload hooks fail to load the assembly themselves, the mono runtime still might.
// Just do Assembly.LoadFrom("/Full/Path/On/Disk.dll");
// In this case, we wouldn't have the assembly known in GDMono, which causes crashes
// if any class inside the assembly is looked up by Godot.
// And causing a lookup like that is as easy as throwing an exception defined in it...
// No, we can't make the assembly load hooks smart enough because they get passed a MonoAssemblyName* only,
// not the disk path passed to say Assembly.LoadFrom().
_wrap_mono_assembly(assembly);
}
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) {
(void)user_data; // UNUSED
String name = mono_assembly_name_get_name(aname);
bool has_extension = name.ends_with(".dll") || name.ends_with(".exe");
if (no_search)
return NULL;
GDMonoAssembly **loaded_asm = GDMono::get_singleton()->get_loaded_assembly(has_extension ? name.get_basename() : name);
if (loaded_asm)
return (*loaded_asm)->get_assembly();
no_search = true; // Avoid the recursion madness
GDMonoAssembly *res = _load_assembly_search(name, search_dirs, refonly);
no_search = false;
return res ? res->get_assembly() : NULL;
}
static _THREAD_LOCAL_(MonoImage *) image_corlib_loading = NULL;
MonoAssembly *GDMonoAssembly::_preload_hook(MonoAssemblyName *aname, char **, void *user_data, bool refonly) {
(void)user_data; // UNUSED
if (search_dirs.empty()) {
fill_search_dirs(search_dirs);
}
{
// If we find the assembly here, we load it with `mono_assembly_load_from_full`,
// which in turn invokes load hooks before returning the MonoAssembly to us.
// One of the load hooks is `load_aot_module`. This hook can end up calling preload hooks
// again for the same assembly in certain in certain circumstances (the `do_load_image` part).
// If this is the case and we return NULL due to the no_search condition below,
// it will result in an internal crash later on. Therefore we need to return the assembly we didn't
// get yet from `mono_assembly_load_from_full`. Luckily we have the image, which already got it.
// This must be done here. If done in search hooks, it would cause `mono_assembly_load_from_full`
// to think another MonoAssembly for this assembly was already loaded, making it delete its own,
// when in fact both pointers were the same... This hooks thing is confusing.
if (image_corlib_loading) {
return mono_image_get_assembly(image_corlib_loading);
}
}
if (no_search)
return NULL;
no_search = true;
in_preload = true;
String name = mono_assembly_name_get_name(aname);
bool has_extension = name.ends_with(".dll");
GDMonoAssembly *res = NULL;
if (has_extension ? name == "mscorlib.dll" : name == "mscorlib") {
GDMonoAssembly **stored_assembly = GDMono::get_singleton()->get_loaded_assembly(has_extension ? name.get_basename() : name);
if (stored_assembly)
return (*stored_assembly)->get_assembly();
res = _load_assembly_search("mscorlib.dll", search_dirs, refonly);
}
no_search = false;
in_preload = false;
return res ? res->get_assembly() : NULL;
}
GDMonoAssembly *GDMonoAssembly::_load_assembly_search(const String &p_name, const Vector<String> &p_search_dirs, bool p_refonly) {
GDMonoAssembly *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 = _load_assembly_from(p_name.get_basename(), path, p_refonly);
if (res != NULL)
return res;
}
} else {
path = search_dir.plus_file(p_name + ".dll");
if (FileAccess::exists(path)) {
res = _load_assembly_from(p_name, path, p_refonly);
if (res != NULL)
return res;
}
path = search_dir.plus_file(p_name + ".exe");
if (FileAccess::exists(path)) {
res = _load_assembly_from(p_name, path, p_refonly);
if (res != NULL)
return res;
}
}
}
return NULL;
}
GDMonoAssembly *GDMonoAssembly::_load_assembly_from(const String &p_name, const String &p_path, bool p_refonly) {
GDMonoAssembly *assembly = memnew(GDMonoAssembly(p_name, p_path));
Error err = assembly->load(p_refonly);
if (err != OK) {
memdelete(assembly);
ERR_FAIL_V(NULL);
}
MonoDomain *domain = mono_domain_get();
GDMono::get_singleton()->add_assembly(domain ? mono_domain_get_id(domain) : 0, assembly);
return assembly;
}
void GDMonoAssembly::_wrap_mono_assembly(MonoAssembly *assembly) {
String name = mono_assembly_name_get_name(mono_assembly_get_name(assembly));
MonoImage *image = mono_assembly_get_image(assembly);
GDMonoAssembly *gdassembly = memnew(GDMonoAssembly(name, mono_image_get_filename(image)));
Error err = gdassembly->wrapper_for_image(image);
if (err != OK) {
memdelete(gdassembly);
ERR_FAIL();
}
MonoDomain *domain = mono_domain_get();
GDMono::get_singleton()->add_assembly(domain ? mono_domain_get_id(domain) : 0, gdassembly);
}
void GDMonoAssembly::initialize() {
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);
}
Error GDMonoAssembly::load(bool p_refonly) {
ERR_FAIL_COND_V(loaded, ERR_FILE_ALREADY_IN_USE);
refonly = p_refonly;
uint64_t last_modified_time = FileAccess::get_modified_time(path);
Vector<uint8_t> data = FileAccess::get_file_as_array(path);
ERR_FAIL_COND_V(data.empty(), ERR_FILE_CANT_READ);
String image_filename = ProjectSettings::get_singleton()->globalize_path(path);
MonoImageOpenStatus status = MONO_IMAGE_OK;
image = mono_image_open_from_data_with_name(
(char *)&data[0], data.size(),
true, &status, refonly,
image_filename.utf8().get_data());
ERR_FAIL_COND_V(status != MONO_IMAGE_OK, ERR_FILE_CANT_OPEN);
ERR_FAIL_NULL_V(image, ERR_FILE_CANT_OPEN);
#ifdef DEBUG_ENABLED
Vector<uint8_t> pdb_data;
String pdb_path(path + ".pdb");
if (!FileAccess::exists(pdb_path)) {
pdb_path = 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 is_corlib_preload = in_preload && name == "mscorlib";
if (is_corlib_preload)
image_corlib_loading = image;
assembly = mono_assembly_load_from_full(image, image_filename.utf8().get_data(), &status, refonly);
if (is_corlib_preload)
image_corlib_loading = NULL;
ERR_FAIL_COND_V(status != MONO_IMAGE_OK || assembly == NULL, ERR_FILE_CANT_OPEN);
// Decrement refcount which was previously incremented by mono_image_open_from_data_with_name
mono_image_close(image);
loaded = true;
modified_time = last_modified_time;
return OK;
}
Error GDMonoAssembly::wrapper_for_image(MonoImage *p_image) {
ERR_FAIL_COND_V(loaded, ERR_FILE_ALREADY_IN_USE);
assembly = mono_image_get_assembly(p_image);
ERR_FAIL_NULL_V(assembly, FAILED);
image = p_image;
loaded = true;
return OK;
}
void GDMonoAssembly::unload() {
ERR_FAIL_COND(!loaded);
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;
loaded = false;
}
GDMonoClass *GDMonoAssembly::get_class(const StringName &p_namespace, const StringName &p_name) {
ERR_FAIL_COND_V(!loaded, 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_COND_V(!loaded, NULL);
Map<MonoClass *, GDMonoClass *>::Element *match = cached_raw.find(p_mono_class);
if (match)
return match->value();
StringName namespace_name = mono_class_get_namespace(p_mono_class);
StringName class_name = 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_back();
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_from(const String &p_name, const String &p_path, bool p_refonly) {
GDMonoAssembly **loaded_asm = GDMono::get_singleton()->get_loaded_assembly(p_name);
if (loaded_asm)
return *loaded_asm;
#ifdef DEBUG_ENABLED
CRASH_COND(!FileAccess::exists(p_path));
#endif
no_search = true;
GDMonoAssembly *res = _load_assembly_from(p_name, p_path, p_refonly);
no_search = false;
return res;
}
GDMonoAssembly::GDMonoAssembly(const String &p_name, const String &p_path) {
loaded = false;
gdobject_class_cache_updated = false;
name = p_name;
path = p_path;
refonly = false;
modified_time = 0;
assembly = NULL;
image = NULL;
}
GDMonoAssembly::~GDMonoAssembly() {
if (loaded)
unload();
}