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https://github.com/mkxp-z/mkxp-z.git
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379c22833f
To stop Ruby's garbage collector from freeing Ruby `VALUE`s while we're in the middle of using them in libretro builds, we need to make sure all the `VALUE`s we use are on the sandbox's stack. Also, to allow Ruby to recognize `VALUE`s on the sandbox's stack on big-endian targets, I've changed the serialization of `VALUE`s. Before, any `VALUE`s returned by a sandbox function were always converted to the target's endian, and any `VALUE`s passed to sandbox functions as argument were then converted back to WebAssembly's endianness, little-endian. Now, `VALUE`s are always little-endian; they are no longer converted to the target's endianness. That should be fine since `VALUE`s are supposed to be opaque values.
80 lines
2.5 KiB
C++
80 lines
2.5 KiB
C++
/*
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** sandbox.h
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**
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** This file is part of mkxp.
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**
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** Copyright (C) 2013 - 2021 Amaryllis Kulla <ancurio@mapleshrine.eu>
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**
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** mkxp is free software: you can redistribute it and/or modify
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** it under the terms of the GNU General Public License as published by
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** the Free Software Foundation, either version 2 of the License, or
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** (at your option) any later version.
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**
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** mkxp is distributed in the hope that it will be useful,
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** but WITHOUT ANY WARRANTY; without even the implied warranty of
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** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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** GNU General Public License for more details.
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**
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** You should have received a copy of the GNU General Public License
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** along with mkxp. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef MKXPZ_SANDBOX_H
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#define MKXPZ_SANDBOX_H
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#include <memory>
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#include <mkxp-sandbox-bindgen.h>
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#include "types.h"
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#define SANDBOX_COROUTINE(name, definition) struct name : boost::asio::coroutine { BOOST_TYPE_INDEX_REGISTER_CLASS inline name(struct mkxp_sandbox::bindings &bind) {} definition };
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#define SANDBOX_AWAIT(coroutine, ...) \
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do { \
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{ \
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mkxp_sandbox::bindings::stack_frame_guard<struct coroutine> frame = mkxp_sandbox::sandbox->bindings.bind<struct coroutine>(); \
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frame()(__VA_ARGS__); \
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if (frame().is_complete()) break; \
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} \
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yield; \
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} while (1)
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#define SANDBOX_AWAIT_AND_SET(variable, coroutine, ...) \
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do { \
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{ \
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mkxp_sandbox::bindings::stack_frame_guard<struct coroutine> frame = mkxp_sandbox::sandbox->bindings.bind<struct coroutine>(); \
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auto ret = frame()(__VA_ARGS__); \
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if (frame().is_complete()) { \
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variable = ret; \
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break; \
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} \
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} \
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yield; \
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} while (1)
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namespace mkxp_sandbox {
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struct sandbox {
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private:
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std::shared_ptr<struct w2c_ruby> ruby;
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std::unique_ptr<struct w2c_wasi__snapshot__preview1> wasi;
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usize sandbox_malloc(usize size);
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void sandbox_free(usize ptr);
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public:
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struct mkxp_sandbox::bindings bindings;
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sandbox(const char *game_path);
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~sandbox();
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template <typename T> inline void run() {
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T coroutine = T();
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for (;;) {
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coroutine();
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if (coroutine.is_complete()) break;
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w2c_ruby_mkxp_sandbox_yield(ruby.get());
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}
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}
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};
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extern std::unique_ptr<struct mkxp_sandbox::sandbox> sandbox;
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}
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#endif // MKXPZ_SANDBOX_H
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