Adding upstream version 124.0.1.upstream/124.0.1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

8 files changed, 2369 insertions, 0 deletions

diff --git a/third_party/rlbox_wasm2c_sandbox/LICENSE b/third_party/rlbox_wasm2c_sandbox/LICENSE
new file mode 100755
index 0000000000..87e0ce55af
--- /dev/null
+++ b/third_party/rlbox_wasm2c_sandbox/LICENSE
@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2019 UCSD PLSysSec
+
+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.
diff --git a/third_party/rlbox_wasm2c_sandbox/c_src/wasm2c_sandbox_wrapper.c b/third_party/rlbox_wasm2c_sandbox/c_src/wasm2c_sandbox_wrapper.c
new file mode 100755
index 0000000000..99b1e7ec56
--- /dev/null
+++ b/third_party/rlbox_wasm2c_sandbox/c_src/wasm2c_sandbox_wrapper.c
@@ -0,0 +1,7 @@
+#include <stdlib.h>
+
+int main(int argc, char *argv[]) {
+    (void) argc;
+    (void) argv;
+    abort();
+}
diff --git a/third_party/rlbox_wasm2c_sandbox/include/rlbox_wasm2c_sandbox.hpp b/third_party/rlbox_wasm2c_sandbox/include/rlbox_wasm2c_sandbox.hpp
new file mode 100644
index 0000000000..cc6195d84e
--- /dev/null
+++ b/third_party/rlbox_wasm2c_sandbox/include/rlbox_wasm2c_sandbox.hpp
@@ -0,0 +1,971 @@
+#pragma once
+
+#include "rlbox_wasm2c_tls.hpp"
+#include "wasm-rt.h"
+#include "wasm2c_rt_mem.h"
+#include "wasm2c_rt_minwasi.h"
+
+// Pull the helper header from the main repo for dynamic_check and scope_exit
+#include "rlbox_helpers.hpp"
+
+#include <cstdint>
+#include <iostream>
+#include <limits>
+#include <map>
+#include <memory>
+#include <mutex>
+// RLBox allows applications to provide a custom shared lock implementation
+#ifndef RLBOX_USE_CUSTOM_SHARED_LOCK
+#  include <shared_mutex>
+#endif
+#include <string>
+#include <type_traits>
+#include <utility>
+#include <vector>
+
+#if defined(_WIN32)
+// Ensure the min/max macro in the header doesn't collide with functions in
+// std::
+#  ifndef NOMINMAX
+#    define NOMINMAX
+#  endif
+#  include <windows.h>
+#else
+#  include <dlfcn.h>
+#endif
+
+#define RLBOX_WASM2C_UNUSED(...) (void)__VA_ARGS__
+
+// Use the same convention as rlbox to allow applications to customize the
+// shared lock
+#ifndef RLBOX_USE_CUSTOM_SHARED_LOCK
+#  define RLBOX_SHARED_LOCK(name) std::shared_timed_mutex name
+#  define RLBOX_ACQUIRE_SHARED_GUARD(name, ...)                                \
+    std::shared_lock<std::shared_timed_mutex> name(__VA_ARGS__)
+#  define RLBOX_ACQUIRE_UNIQUE_GUARD(name, ...)                                \
+    std::unique_lock<std::shared_timed_mutex> name(__VA_ARGS__)
+#else
+#  if !defined(RLBOX_SHARED_LOCK) || !defined(RLBOX_ACQUIRE_SHARED_GUARD) ||   \
+    !defined(RLBOX_ACQUIRE_UNIQUE_GUARD)
+#    error                                                                     \
+      "RLBOX_USE_CUSTOM_SHARED_LOCK defined but missing definitions for RLBOX_SHARED_LOCK, RLBOX_ACQUIRE_SHARED_GUARD, RLBOX_ACQUIRE_UNIQUE_GUARD"
+#  endif
+#endif
+
+#define DEFINE_RLBOX_WASM2C_MODULE_TYPE(modname)                               \
+  struct rlbox_wasm2c_module_type_##modname                                    \
+  {                                                                            \
+    using instance_t = w2c_##modname;                                          \
+                                                                               \
+    using create_instance_t = void (*)(instance_t*,                            \
+                                       struct w2c_env*,                        \
+                                       struct w2c_wasi__snapshot__preview1*);  \
+    static constexpr create_instance_t create_instance =                       \
+      &wasm2c_##modname##_instantiate;                                         \
+                                                                               \
+    using free_instance_t = void (*)(instance_t*);                             \
+    static constexpr free_instance_t free_instance = &wasm2c_##modname##_free; \
+                                                                               \
+    using get_func_type_t = wasm_rt_func_type_t (*)(uint32_t, uint32_t, ...);  \
+    static constexpr get_func_type_t get_func_type =                           \
+      &wasm2c_##modname##_get_func_type;                                       \
+                                                                               \
+    static constexpr const uint64_t* initial_memory_pages =                    \
+      &wasm2c_##modname##_min_env_memory;                                      \
+    static constexpr const uint8_t* is_memory_64 =                             \
+      &wasm2c_##modname##_is64_env_memory;                                     \
+    static constexpr const uint32_t* initial_func_elements =                   \
+      &wasm2c_##modname##_min_env_0x5F_indirect_function_table;                \
+                                                                               \
+    static constexpr const char* prefix = #modname;                            \
+                                                                               \
+    /* A function that returns the address of the func specified as a          \
+     * constexpr string */                                                     \
+    /* Unfortunately, there is no way to implement the below in C++. */        \
+    /* Implement this to fully support multiple static modules. */             \
+    /* static constexpr void* dlsym_in_w2c_module(const char* func_name) { */  \
+    /*    return &w2c_##modname##_%func%; */                                   \
+    /* } */                                                                    \
+                                                                               \
+    static constexpr auto malloc_address = &w2c_##modname##_malloc;            \
+    static constexpr auto free_address = &w2c_##modname##_free;                \
+  }
+
+// wasm_module_name module name used when compiling with wasm2c
+#ifndef RLBOX_WASM2C_MODULE_NAME
+#  error "Expected definition for RLBOX_WASM2C_MODULE_NAME"
+#endif
+
+// Need an extra macro to expand RLBOX_WASM2C_MODULE_NAME
+#define INVOKE_DEFINE_RLBOX_WASM2C_MODULE_TYPE(modname)                        \
+  DEFINE_RLBOX_WASM2C_MODULE_TYPE(modname)
+
+INVOKE_DEFINE_RLBOX_WASM2C_MODULE_TYPE(RLBOX_WASM2C_MODULE_NAME);
+
+// Concat after macro expansion
+#define RLBOX_WASM2C_CONCAT2(x, y) x##y
+#define RLBOX_WASM2C_CONCAT(x, y) RLBOX_WASM2C_CONCAT2(x, y)
+
+#define RLBOX_WASM_MODULE_TYPE_CURR                                            \
+  RLBOX_WASM2C_CONCAT(rlbox_wasm2c_module_type_, RLBOX_WASM2C_MODULE_NAME)
+
+#define RLBOX_WASM2C_STRINGIFY(x) RLBOX_WASM2C_STRINGIFY2(x)
+#define RLBOX_WASM2C_STRINGIFY2(x) #x
+
+#define RLBOX_WASM2C_MODULE_NAME_STR                                           \
+  RLBOX_WASM2C_STRINGIFY(RLBOX_WASM2C_MODULE_NAME)
+
+#define RLBOX_WASM2C_MODULE_FUNC_HELPER2(part1, part2, part3)                  \
+  part1##part2##part3
+#define RLBOX_WASM2C_MODULE_FUNC_HELPER(part1, part2, part3)                   \
+  RLBOX_WASM2C_MODULE_FUNC_HELPER2(part1, part2, part3)
+#define RLBOX_WASM2C_MODULE_FUNC(name)                                         \
+  RLBOX_WASM2C_MODULE_FUNC_HELPER(w2c_, RLBOX_WASM2C_MODULE_NAME, name)
+
+namespace rlbox {
+
+namespace wasm2c_detail {
+
+  template<typename T>
+  constexpr bool false_v = false;
+
+  // https://stackoverflow.com/questions/6512019/can-we-get-the-type-of-a-lambda-argument
+  namespace return_argument_detail {
+    template<typename Ret, typename... Rest>
+    Ret helper(Ret (*)(Rest...));
+
+    template<typename Ret, typename F, typename... Rest>
+    Ret helper(Ret (F::*)(Rest...));
+
+    template<typename Ret, typename F, typename... Rest>
+    Ret helper(Ret (F::*)(Rest...) const);
+
+    template<typename F>
+    decltype(helper(&F::operator())) helper(F);
+  } // namespace return_argument_detail
+
+  template<typename T>
+  using return_argument =
+    decltype(return_argument_detail::helper(std::declval<T>()));
+
+  ///////////////////////////////////////////////////////////////
+
+  // https://stackoverflow.com/questions/37602057/why-isnt-a-for-loop-a-compile-time-expression
+  namespace compile_time_for_detail {
+    template<std::size_t N>
+    struct num
+    {
+      static const constexpr auto value = N;
+    };
+
+    template<class F, std::size_t... Is>
+    inline void compile_time_for_helper(F func, std::index_sequence<Is...>)
+    {
+      (func(num<Is>{}), ...);
+    }
+  } // namespace compile_time_for_detail
+
+  template<std::size_t N, typename F>
+  inline void compile_time_for(F func)
+  {
+    compile_time_for_detail::compile_time_for_helper(
+      func, std::make_index_sequence<N>());
+  }
+
+  ///////////////////////////////////////////////////////////////
+
+  template<typename T, typename = void>
+  struct convert_type_to_wasm_type
+  {
+    static_assert(std::is_void_v<T>, "Missing specialization");
+    using type = void;
+    // wasm2c has no void type so use i32 for now
+    static constexpr wasm_rt_type_t wasm2c_type = WASM_RT_I32;
+  };
+
+  template<typename T>
+  struct convert_type_to_wasm_type<
+    T,
+    std::enable_if_t<(std::is_integral_v<T> || std::is_enum_v<T>)&&sizeof(T) <=
+                     sizeof(uint32_t)>>
+  {
+    using type = uint32_t;
+    static constexpr wasm_rt_type_t wasm2c_type = WASM_RT_I32;
+  };
+
+  template<typename T>
+  struct convert_type_to_wasm_type<
+    T,
+    std::enable_if_t<(std::is_integral_v<T> ||
+                      std::is_enum_v<T>)&&sizeof(uint32_t) < sizeof(T) &&
+                     sizeof(T) <= sizeof(uint64_t)>>
+  {
+    using type = uint64_t;
+    static constexpr wasm_rt_type_t wasm2c_type = WASM_RT_I64;
+  };
+
+  template<typename T>
+  struct convert_type_to_wasm_type<T,
+                                   std::enable_if_t<std::is_same_v<T, float>>>
+  {
+    using type = T;
+    static constexpr wasm_rt_type_t wasm2c_type = WASM_RT_F32;
+  };
+
+  template<typename T>
+  struct convert_type_to_wasm_type<T,
+                                   std::enable_if_t<std::is_same_v<T, double>>>
+  {
+    using type = T;
+    static constexpr wasm_rt_type_t wasm2c_type = WASM_RT_F64;
+  };
+
+  template<typename T>
+  struct convert_type_to_wasm_type<
+    T,
+    std::enable_if_t<std::is_pointer_v<T> || std::is_class_v<T>>>
+  {
+    // pointers are 32 bit indexes in wasm
+    // class paramters are passed as a pointer to an object in the stack or heap
+    using type = uint32_t;
+    static constexpr wasm_rt_type_t wasm2c_type = WASM_RT_I32;
+  };
+
+  ///////////////////////////////////////////////////////////////
+
+  namespace prepend_arg_type_detail {
+    template<typename T, typename T_ArgNew>
+    struct helper;
+
+    template<typename T_ArgNew, typename T_Ret, typename... T_Args>
+    struct helper<T_Ret(T_Args...), T_ArgNew>
+    {
+      using type = T_Ret(T_ArgNew, T_Args...);
+    };
+  }
+
+  template<typename T_Func, typename T_ArgNew>
+  using prepend_arg_type =
+    typename prepend_arg_type_detail::helper<T_Func, T_ArgNew>::type;
+
+  ///////////////////////////////////////////////////////////////
+
+  namespace change_return_type_detail {
+    template<typename T, typename T_RetNew>
+    struct helper;
+
+    template<typename T_RetNew, typename T_Ret, typename... T_Args>
+    struct helper<T_Ret(T_Args...), T_RetNew>
+    {
+      using type = T_RetNew(T_Args...);
+    };
+  }
+
+  template<typename T_Func, typename T_RetNew>
+  using change_return_type =
+    typename change_return_type_detail::helper<T_Func, T_RetNew>::type;
+
+  ///////////////////////////////////////////////////////////////
+
+  namespace change_class_arg_types_detail {
+    template<typename T, typename T_ArgNew>
+    struct helper;
+
+    template<typename T_ArgNew, typename T_Ret, typename... T_Args>
+    struct helper<T_Ret(T_Args...), T_ArgNew>
+    {
+      using type =
+        T_Ret(std::conditional_t<std::is_class_v<T_Args>, T_ArgNew, T_Args>...);
+    };
+  }
+
+  template<typename T_Func, typename T_ArgNew>
+  using change_class_arg_types =
+    typename change_class_arg_types_detail::helper<T_Func, T_ArgNew>::type;
+
+} // namespace wasm2c_detail
+
+// declare the static symbol with weak linkage to keep this header only
+#if defined(_WIN32)
+__declspec(selectany)
+#else
+__attribute__((weak))
+#endif
+  std::once_flag rlbox_wasm2c_initialized;
+
+class rlbox_wasm2c_sandbox
+{
+public:
+  using T_LongLongType = int64_t;
+  using T_LongType = int32_t;
+  using T_IntType = int32_t;
+  using T_PointerType = uint32_t;
+  using T_ShortType = int16_t;
+
+private:
+  mutable typename RLBOX_WASM_MODULE_TYPE_CURR::instance_t wasm2c_instance{ 0 };
+  struct w2c_env sandbox_memory_env;
+  struct w2c_wasi__snapshot__preview1 wasi_env;
+  bool instance_initialized = false;
+  wasm_rt_memory_t sandbox_memory_info;
+  mutable wasm_rt_funcref_table_t sandbox_callback_table;
+  uintptr_t heap_base;
+  size_t return_slot_size = 0;
+  T_PointerType return_slot = 0;
+  mutable std::vector<T_PointerType> callback_free_list;
+
+  static const size_t MAX_CALLBACKS = 128;
+  mutable RLBOX_SHARED_LOCK(callback_mutex);
+  void* callback_unique_keys[MAX_CALLBACKS]{ 0 };
+  void* callbacks[MAX_CALLBACKS]{ 0 };
+  uint32_t callback_slot_assignment[MAX_CALLBACKS]{ 0 };
+  mutable std::map<const void*, uint32_t> internal_callbacks;
+  mutable std::map<uint32_t, const void*> slot_assignments;
+
+#ifndef RLBOX_EMBEDDER_PROVIDES_TLS_STATIC_VARIABLES
+  thread_local static inline rlbox_wasm2c_sandbox_thread_data thread_data{ 0,
+                                                                           0 };
+#endif
+
+  template<typename T_FormalRet, typename T_ActualRet>
+  inline auto serialize_to_sandbox(T_ActualRet arg)
+  {
+    if constexpr (std::is_class_v<T_FormalRet>) {
+      // structs returned as pointers into wasm memory/wasm stack
+      auto ptr = reinterpret_cast<T_FormalRet*>(
+        impl_get_unsandboxed_pointer<T_FormalRet*>(arg));
+      T_FormalRet ret = *ptr;
+      return ret;
+    } else {
+      return arg;
+    }
+  }
+
+  template<uint32_t N, typename T_Ret, typename... T_Args>
+  static typename wasm2c_detail::convert_type_to_wasm_type<T_Ret>::type
+  callback_interceptor(
+    void* /* vmContext */,
+    typename wasm2c_detail::convert_type_to_wasm_type<T_Args>::type... params)
+  {
+#ifdef RLBOX_EMBEDDER_PROVIDES_TLS_STATIC_VARIABLES
+    auto& thread_data = *get_rlbox_wasm2c_sandbox_thread_data();
+#endif
+    thread_data.last_callback_invoked = N;
+    using T_Func = T_Ret (*)(T_Args...);
+    T_Func func;
+    {
+#ifndef RLBOX_SINGLE_THREADED_INVOCATIONS
+      RLBOX_ACQUIRE_SHARED_GUARD(lock, thread_data.sandbox->callback_mutex);
+#endif
+      func = reinterpret_cast<T_Func>(thread_data.sandbox->callbacks[N]);
+    }
+    // Callbacks are invoked through function pointers, cannot use std::forward
+    // as we don't have caller context for T_Args, which means they are all
+    // effectively passed by value
+    return func(
+      thread_data.sandbox->template serialize_to_sandbox<T_Args>(params)...);
+  }
+
+  template<uint32_t N, typename T_Ret, typename... T_Args>
+  static void callback_interceptor_promoted(
+    void* /* vmContext */,
+    typename wasm2c_detail::convert_type_to_wasm_type<T_Ret>::type ret,
+    typename wasm2c_detail::convert_type_to_wasm_type<T_Args>::type... params)
+  {
+#ifdef RLBOX_EMBEDDER_PROVIDES_TLS_STATIC_VARIABLES
+    auto& thread_data = *get_rlbox_wasm2c_sandbox_thread_data();
+#endif
+    thread_data.last_callback_invoked = N;
+    using T_Func = T_Ret (*)(T_Args...);
+    T_Func func;
+    {
+#ifndef RLBOX_SINGLE_THREADED_INVOCATIONS
+      RLBOX_ACQUIRE_SHARED_GUARD(lock, thread_data.sandbox->callback_mutex);
+#endif
+      func = reinterpret_cast<T_Func>(thread_data.sandbox->callbacks[N]);
+    }
+    // Callbacks are invoked through function pointers, cannot use std::forward
+    // as we don't have caller context for T_Args, which means they are all
+    // effectively passed by value
+    auto ret_val = func(
+      thread_data.sandbox->template serialize_to_sandbox<T_Args>(params)...);
+    // Copy the return value back
+    auto ret_ptr = reinterpret_cast<T_Ret*>(
+      thread_data.sandbox->template impl_get_unsandboxed_pointer<T_Ret*>(ret));
+    *ret_ptr = ret_val;
+  }
+
+  template<typename T_Ret, typename... T_Args>
+  inline wasm_rt_func_type_t get_wasm2c_func_index(
+    // dummy for template inference
+    T_Ret (*)(T_Args...) = nullptr) const
+  {
+    // Class return types as promoted to args
+    constexpr bool promoted = std::is_class_v<T_Ret>;
+    constexpr uint32_t param_count =
+      promoted ? (sizeof...(T_Args) + 1) : (sizeof...(T_Args));
+    constexpr uint32_t ret_count =
+      promoted ? 0 : (std::is_void_v<T_Ret> ? 0 : 1);
+
+    wasm_rt_func_type_t ret = nullptr;
+    if constexpr (ret_count == 0) {
+      ret = RLBOX_WASM_MODULE_TYPE_CURR::get_func_type(
+        param_count,
+        ret_count,
+        wasm2c_detail::convert_type_to_wasm_type<T_Args>::wasm2c_type...);
+    } else {
+      ret = RLBOX_WASM_MODULE_TYPE_CURR::get_func_type(
+        param_count,
+        ret_count,
+        wasm2c_detail::convert_type_to_wasm_type<T_Args>::wasm2c_type...,
+        wasm2c_detail::convert_type_to_wasm_type<T_Ret>::wasm2c_type);
+    }
+
+    return ret;
+  }
+
+  void ensure_return_slot_size(size_t size)
+  {
+    if (size > return_slot_size) {
+      if (return_slot_size) {
+        impl_free_in_sandbox(return_slot);
+      }
+      return_slot = impl_malloc_in_sandbox(size);
+      detail::dynamic_check(
+        return_slot != 0,
+        "Error initializing return slot. Sandbox may be out of memory!");
+      return_slot_size = size;
+    }
+  }
+
+  // function takes a 32-bit value and returns the next power of 2
+  // return is a 64-bit value as large 32-bit values will return 2^32
+  static inline uint64_t next_power_of_two(uint32_t value)
+  {
+    uint64_t power = 1;
+    while (power < value) {
+      power *= 2;
+    }
+    return power;
+  }
+
+protected:
+#define rlbox_wasm2c_sandbox_lookup_symbol(func_name)                          \
+  reinterpret_cast<void*>(&RLBOX_WASM2C_MODULE_FUNC(_##func_name)) /* NOLINT   \
+                                                                    */
+
+  // adding a template so that we can use static_assert to fire only if this
+  // function is invoked
+  template<typename T = void>
+  void* impl_lookup_symbol(const char* func_name)
+  {
+    constexpr bool fail = std::is_same_v<T, void>;
+    static_assert(
+      !fail,
+      "The wasm2c_sandbox uses static calls and thus developers should add\n\n"
+      "#define RLBOX_USE_STATIC_CALLS() rlbox_wasm2c_sandbox_lookup_symbol\n\n"
+      "to their code, to ensure that static calls are handled correctly.");
+    return nullptr;
+  }
+
+public:
+#define FALLIBLE_DYNAMIC_CHECK(infallible, cond, msg)                          \
+  if (infallible) {                                                            \
+    detail::dynamic_check(cond, msg);                                          \
+  } else if (!(cond)) {                                                        \
+    impl_destroy_sandbox();                                                    \
+    return false;                                                              \
+  }
+
+  /**
+   * @brief creates the Wasm sandbox from the given shared library
+   *
+   * @param infallible if set to true, the sandbox aborts on failure. If false,
+   * the sandbox returns creation status as a return value
+   * @param custom_capacity allows optionally overriding the platform-specified
+   * maximum size of the wasm heap allowed for this sandbox instance.
+   * @return true when sandbox is successfully created. false when infallible is
+   * set to false and sandbox was not successfully created. If infallible is set
+   * to true, this function will never return false.
+   */
+  inline bool impl_create_sandbox(
+    bool infallible = true,
+    const w2c_mem_capacity* custom_capacity = nullptr)
+  {
+    FALLIBLE_DYNAMIC_CHECK(
+      infallible, instance_initialized == false, "Sandbox already initialized");
+
+    bool minwasi_init_succeeded = true;
+
+    std::call_once(rlbox_wasm2c_initialized, [&]() {
+      wasm_rt_init();
+      minwasi_init_succeeded = minwasi_init();
+    });
+
+    FALLIBLE_DYNAMIC_CHECK(
+      infallible, minwasi_init_succeeded, "Could not initialize min wasi");
+
+    const bool minwasi_init_inst_succeeded = minwasi_init_instance(&wasi_env);
+    FALLIBLE_DYNAMIC_CHECK(
+      infallible, minwasi_init_inst_succeeded, "Could not initialize min wasi instance");
+
+    if (custom_capacity) {
+      FALLIBLE_DYNAMIC_CHECK(
+        infallible, custom_capacity->is_valid, "Invalid capacity");
+    }
+
+    sandbox_memory_info = create_wasm2c_memory(
+      *RLBOX_WASM_MODULE_TYPE_CURR::initial_memory_pages, custom_capacity);
+    FALLIBLE_DYNAMIC_CHECK(infallible,
+                           sandbox_memory_info.data != nullptr,
+                           "Could not allocate a heap for the wasm2c sandbox");
+
+    FALLIBLE_DYNAMIC_CHECK(infallible,
+                           *RLBOX_WASM_MODULE_TYPE_CURR::is_memory_64 == 0,
+                           "Does not support Wasm with memory64");
+
+    const uint32_t max_table_size = 0xffffffffu; /* this means unlimited */
+    wasm_rt_allocate_funcref_table(
+      &sandbox_callback_table,
+      *RLBOX_WASM_MODULE_TYPE_CURR::initial_func_elements,
+      max_table_size);
+
+    sandbox_memory_env.sandbox_memory_info = &sandbox_memory_info;
+    sandbox_memory_env.sandbox_callback_table = &sandbox_callback_table;
+    wasi_env.instance_memory = &sandbox_memory_info;
+    RLBOX_WASM_MODULE_TYPE_CURR::create_instance(
+      &wasm2c_instance, &sandbox_memory_env, &wasi_env);
+
+    heap_base = reinterpret_cast<uintptr_t>(impl_get_memory_location());
+
+    if constexpr (sizeof(uintptr_t) != sizeof(uint32_t)) {
+      // On larger platforms, check that the heap is aligned to the pointer size
+      // i.e. 32-bit pointer => aligned to 4GB. The implementations of
+      // impl_get_unsandboxed_pointer_no_ctx and
+      // impl_get_sandboxed_pointer_no_ctx below rely on this.
+      uintptr_t heap_offset_mask = std::numeric_limits<T_PointerType>::max();
+      FALLIBLE_DYNAMIC_CHECK(infallible,
+                             (heap_base & heap_offset_mask) == 0,
+                             "Sandbox heap not aligned to 4GB");
+    }
+
+    instance_initialized = true;
+
+    return true;
+  }
+
+#undef FALLIBLE_DYNAMIC_CHECK
+
+  inline void impl_destroy_sandbox()
+  {
+    if (return_slot_size) {
+      impl_free_in_sandbox(return_slot);
+    }
+
+    if (instance_initialized) {
+      instance_initialized = false;
+      RLBOX_WASM_MODULE_TYPE_CURR::free_instance(&wasm2c_instance);
+    }
+
+    destroy_wasm2c_memory(&sandbox_memory_info);
+    wasm_rt_free_funcref_table(&sandbox_callback_table);
+    minwasi_cleanup_instance(&wasi_env);
+  }
+
+  template<typename T>
+  inline void* impl_get_unsandboxed_pointer(T_PointerType p) const
+  {
+    if constexpr (std::is_function_v<std::remove_pointer_t<T>>) {
+      RLBOX_ACQUIRE_UNIQUE_GUARD(lock, callback_mutex);
+      auto found = slot_assignments.find(p);
+      if (found != slot_assignments.end()) {
+        auto ret = found->second;
+        return const_cast<void*>(ret);
+      } else {
+        return nullptr;
+      }
+    } else {
+      return reinterpret_cast<void*>(heap_base + p);
+    }
+  }
+
+  template<typename T>
+  inline T_PointerType impl_get_sandboxed_pointer(const void* p) const
+  {
+    if constexpr (std::is_function_v<std::remove_pointer_t<T>>) {
+      RLBOX_ACQUIRE_UNIQUE_GUARD(lock, callback_mutex);
+
+      uint32_t slot_number = 0;
+      auto found = internal_callbacks.find(p);
+      if (found != internal_callbacks.end()) {
+        slot_number = found->second;
+      } else {
+
+        slot_number = new_callback_slot();
+        wasm_rt_funcref_t func_val;
+        func_val.func_type = get_wasm2c_func_index(static_cast<T>(nullptr));
+        func_val.func =
+          reinterpret_cast<wasm_rt_function_ptr_t>(const_cast<void*>(p));
+        func_val.module_instance = &wasm2c_instance;
+
+        sandbox_callback_table.data[slot_number] = func_val;
+        internal_callbacks[p] = slot_number;
+        slot_assignments[slot_number] = p;
+      }
+      return static_cast<T_PointerType>(slot_number);
+    } else {
+      if constexpr (sizeof(uintptr_t) == sizeof(uint32_t)) {
+        return static_cast<T_PointerType>(reinterpret_cast<uintptr_t>(p) -
+                                          heap_base);
+      } else {
+        return static_cast<T_PointerType>(reinterpret_cast<uintptr_t>(p));
+      }
+    }
+  }
+
+  template<typename T>
+  static inline void* impl_get_unsandboxed_pointer_no_ctx(
+    T_PointerType p,
+    const void* example_unsandboxed_ptr,
+    rlbox_wasm2c_sandbox* (*expensive_sandbox_finder)(
+      const void* example_unsandboxed_ptr))
+  {
+    // on 32-bit platforms we don't assume the heap is aligned
+    if constexpr (sizeof(uintptr_t) == sizeof(uint32_t)) {
+      auto sandbox = expensive_sandbox_finder(example_unsandboxed_ptr);
+      return sandbox->template impl_get_unsandboxed_pointer<T>(p);
+    } else {
+      if constexpr (std::is_function_v<std::remove_pointer_t<T>>) {
+        // swizzling function pointers needs access to the function pointer
+        // tables and thus cannot be done without context
+        auto sandbox = expensive_sandbox_finder(example_unsandboxed_ptr);
+        return sandbox->template impl_get_unsandboxed_pointer<T>(p);
+      } else {
+        // grab the memory base from the example_unsandboxed_ptr
+        uintptr_t heap_base_mask =
+          std::numeric_limits<uintptr_t>::max() &
+          ~(static_cast<uintptr_t>(std::numeric_limits<T_PointerType>::max()));
+        uintptr_t computed_heap_base =
+          reinterpret_cast<uintptr_t>(example_unsandboxed_ptr) & heap_base_mask;
+        uintptr_t ret = computed_heap_base | p;
+        return reinterpret_cast<void*>(ret);
+      }
+    }
+  }
+
+  template<typename T>
+  static inline T_PointerType impl_get_sandboxed_pointer_no_ctx(
+    const void* p,
+    const void* example_unsandboxed_ptr,
+    rlbox_wasm2c_sandbox* (*expensive_sandbox_finder)(
+      const void* example_unsandboxed_ptr))
+  {
+    // on 32-bit platforms we don't assume the heap is aligned
+    if constexpr (sizeof(uintptr_t) == sizeof(uint32_t)) {
+      auto sandbox = expensive_sandbox_finder(example_unsandboxed_ptr);
+      return sandbox->template impl_get_sandboxed_pointer<T>(p);
+    } else {
+      if constexpr (std::is_function_v<std::remove_pointer_t<T>>) {
+        // swizzling function pointers needs access to the function pointer
+        // tables and thus cannot be done without context
+        auto sandbox = expensive_sandbox_finder(example_unsandboxed_ptr);
+        return sandbox->template impl_get_sandboxed_pointer<T>(p);
+      } else {
+        // Just clear the memory base to leave the offset
+        RLBOX_WASM2C_UNUSED(example_unsandboxed_ptr);
+        uintptr_t ret = reinterpret_cast<uintptr_t>(p) &
+                        std::numeric_limits<T_PointerType>::max();
+        return static_cast<T_PointerType>(ret);
+      }
+    }
+  }
+
+  static inline bool impl_is_in_same_sandbox(const void* p1, const void* p2)
+  {
+    uintptr_t heap_base_mask = std::numeric_limits<uintptr_t>::max() &
+                               ~(std::numeric_limits<T_PointerType>::max());
+    return (reinterpret_cast<uintptr_t>(p1) & heap_base_mask) ==
+           (reinterpret_cast<uintptr_t>(p2) & heap_base_mask);
+  }
+
+  inline bool impl_is_pointer_in_sandbox_memory(const void* p)
+  {
+    size_t length = impl_get_total_memory();
+    uintptr_t p_val = reinterpret_cast<uintptr_t>(p);
+    return p_val >= heap_base && p_val < (heap_base + length);
+  }
+
+  inline bool impl_is_pointer_in_app_memory(const void* p)
+  {
+    return !(impl_is_pointer_in_sandbox_memory(p));
+  }
+
+  inline size_t impl_get_total_memory() { return sandbox_memory_info.size; }
+
+  inline void* impl_get_memory_location() const
+  {
+    return sandbox_memory_info.data;
+  }
+
+  template<typename T, typename T_Converted, typename... T_Args>
+  auto impl_invoke_with_func_ptr(T_Converted* func_ptr, T_Args&&... params)
+  {
+#ifdef RLBOX_EMBEDDER_PROVIDES_TLS_STATIC_VARIABLES
+    auto& thread_data = *get_rlbox_wasm2c_sandbox_thread_data();
+#endif
+    auto old_sandbox = thread_data.sandbox;
+    thread_data.sandbox = this;
+    auto on_exit =
+      detail::make_scope_exit([&] { thread_data.sandbox = old_sandbox; });
+
+    // WASM functions are mangled in the following manner
+    // 1. All primitive types are left as is and follow an LP32 machine model
+    // (as opposed to the possibly 64-bit application)
+    // 2. All pointers are changed to u32 types
+    // 3. Returned class are returned as an out parameter before the actual
+    // function parameters
+    // 4. All class parameters are passed as pointers (u32 types)
+    // 5. The heap address is passed in as the first argument to the function
+    //
+    // RLBox accounts for the first 2 differences in T_Converted type, but we
+    // need to handle the rest
+
+    // Handle point 3
+    using T_Ret = wasm2c_detail::return_argument<T_Converted>;
+    if constexpr (std::is_class_v<T_Ret>) {
+      using T_Conv1 = wasm2c_detail::change_return_type<T_Converted, void>;
+      using T_Conv2 = wasm2c_detail::prepend_arg_type<T_Conv1, T_PointerType>;
+      auto func_ptr_conv =
+        reinterpret_cast<T_Conv2*>(reinterpret_cast<uintptr_t>(func_ptr));
+      ensure_return_slot_size(sizeof(T_Ret));
+      impl_invoke_with_func_ptr<T>(func_ptr_conv, return_slot, params...);
+
+      auto ptr = reinterpret_cast<T_Ret*>(
+        impl_get_unsandboxed_pointer<T_Ret*>(return_slot));
+      T_Ret ret = *ptr;
+      return ret;
+    }
+
+    // Handle point 4
+    constexpr size_t alloc_length = [&] {
+      if constexpr (sizeof...(params) > 0) {
+        return ((std::is_class_v<T_Args> ? 1 : 0) + ...);
+      } else {
+        return 0;
+      }
+    }();
+
+    // 0 arg functions create 0 length arrays which is not allowed
+    T_PointerType allocations_buff[alloc_length == 0 ? 1 : alloc_length];
+    T_PointerType* allocations = allocations_buff;
+
+    auto serialize_class_arg =
+      [&](auto arg) -> std::conditional_t<std::is_class_v<decltype(arg)>,
+                                          T_PointerType,
+                                          decltype(arg)> {
+      using T_Arg = decltype(arg);
+      if constexpr (std::is_class_v<T_Arg>) {
+        auto slot = impl_malloc_in_sandbox(sizeof(T_Arg));
+        auto ptr =
+          reinterpret_cast<T_Arg*>(impl_get_unsandboxed_pointer<T_Arg*>(slot));
+        *ptr = arg;
+        allocations[0] = slot;
+        allocations++;
+        return slot;
+      } else {
+        return arg;
+      }
+    };
+
+    // 0 arg functions don't use serialize
+    RLBOX_WASM2C_UNUSED(serialize_class_arg);
+
+    using T_ConvNoClass =
+      wasm2c_detail::change_class_arg_types<T_Converted, T_PointerType>;
+
+    // Handle Point 5
+    using T_ConvHeap = wasm2c_detail::prepend_arg_type<
+      T_ConvNoClass,
+      typename RLBOX_WASM_MODULE_TYPE_CURR::instance_t*>;
+
+    // Function invocation
+    auto func_ptr_conv =
+      reinterpret_cast<T_ConvHeap*>(reinterpret_cast<uintptr_t>(func_ptr));
+
+    using T_NoVoidRet =
+      std::conditional_t<std::is_void_v<T_Ret>, uint32_t, T_Ret>;
+    T_NoVoidRet ret;
+
+    if constexpr (std::is_void_v<T_Ret>) {
+      RLBOX_WASM2C_UNUSED(ret);
+      func_ptr_conv(&wasm2c_instance, serialize_class_arg(params)...);
+    } else {
+      ret = func_ptr_conv(&wasm2c_instance, serialize_class_arg(params)...);
+    }
+
+    for (size_t i = 0; i < alloc_length; i++) {
+      impl_free_in_sandbox(allocations_buff[i]);
+    }
+
+    if constexpr (!std::is_void_v<T_Ret>) {
+      return ret;
+    }
+  }
+
+  inline T_PointerType impl_malloc_in_sandbox(size_t size)
+  {
+    if constexpr (sizeof(size) > sizeof(uint32_t)) {
+      detail::dynamic_check(size <= std::numeric_limits<uint32_t>::max(),
+                            "Attempting to malloc more than the heap size");
+    }
+    using T_Func = void*(size_t);
+    using T_Converted = T_PointerType(uint32_t);
+    T_PointerType ret = impl_invoke_with_func_ptr<T_Func, T_Converted>(
+      reinterpret_cast<T_Converted*>(
+        RLBOX_WASM_MODULE_TYPE_CURR::malloc_address),
+      static_cast<uint32_t>(size));
+    return ret;
+  }
+
+  inline void impl_free_in_sandbox(T_PointerType p)
+  {
+    using T_Func = void(void*);
+    using T_Converted = void(T_PointerType);
+    impl_invoke_with_func_ptr<T_Func, T_Converted>(
+      reinterpret_cast<T_Converted*>(RLBOX_WASM_MODULE_TYPE_CURR::free_address),
+      p);
+  }
+
+private:
+  // Should be called with callback_mutex held
+  uint32_t new_callback_slot() const
+  {
+    if (callback_free_list.size() > 0) {
+      uint32_t ret = callback_free_list.back();
+      callback_free_list.pop_back();
+      return ret;
+    }
+
+    const uint32_t curr_size = sandbox_callback_table.size;
+
+    detail::dynamic_check(
+      curr_size < sandbox_callback_table.max_size,
+      "Could not find an empty row in Wasm instance table. This would "
+      "happen if you have registered too many callbacks, or unsandboxed "
+      "too many function pointers.");
+
+    wasm_rt_funcref_t func_val{ 0 };
+    // on success, this returns the previous number of elements in the table
+    const uint32_t ret =
+      wasm_rt_grow_funcref_table(&sandbox_callback_table, 1, func_val);
+
+    detail::dynamic_check(
+      ret != 0 && ret != (uint32_t)-1,
+      "Adding a new callback slot to the wasm instance failed.");
+
+    // We have expanded the number of slots
+    // Previous slots size: ret
+    // New slot is at index: ret
+    const uint32_t slot_number = ret;
+    return slot_number;
+  }
+
+  void free_callback_slot(uint32_t slot) const
+  {
+    callback_free_list.push_back(slot);
+  }
+
+public:
+  template<typename T_Ret, typename... T_Args>
+  inline T_PointerType impl_register_callback(void* key, void* callback)
+  {
+    bool found = false;
+    uint32_t found_loc = 0;
+    wasm_rt_function_ptr_t chosen_interceptor = nullptr;
+
+    RLBOX_ACQUIRE_UNIQUE_GUARD(lock, callback_mutex);
+
+    // need a compile time for loop as we we need I to be a compile time value
+    // this is because we are setting the I'th callback ineterceptor
+    wasm2c_detail::compile_time_for<MAX_CALLBACKS>([&](auto I) {
+      constexpr auto i = I.value;
+      if (!found && callbacks[i] == nullptr) {
+        found = true;
+        found_loc = i;
+
+        if constexpr (std::is_class_v<T_Ret>) {
+          chosen_interceptor = (wasm_rt_function_ptr_t)(
+            callback_interceptor_promoted<i, T_Ret, T_Args...>);
+        } else {
+          chosen_interceptor =
+            (wasm_rt_function_ptr_t)(callback_interceptor<i, T_Ret, T_Args...>);
+        }
+      }
+    });
+
+    detail::dynamic_check(
+      found,
+      "Could not find an empty slot in sandbox function table. This would "
+      "happen if you have registered too many callbacks, or unsandboxed "
+      "too many function pointers. You can file a bug if you want to "
+      "increase the maximum allowed callbacks or unsadnboxed functions "
+      "pointers");
+
+    wasm_rt_funcref_t func_val;
+    func_val.func_type = get_wasm2c_func_index<T_Ret, T_Args...>();
+    func_val.func = chosen_interceptor;
+    func_val.module_instance = &wasm2c_instance;
+
+    const uint32_t slot_number = new_callback_slot();
+    sandbox_callback_table.data[slot_number] = func_val;
+
+    callback_unique_keys[found_loc] = key;
+    callbacks[found_loc] = callback;
+    callback_slot_assignment[found_loc] = slot_number;
+    slot_assignments[slot_number] = callback;
+
+    return static_cast<T_PointerType>(slot_number);
+  }
+
+  static inline std::pair<rlbox_wasm2c_sandbox*, void*>
+  impl_get_executed_callback_sandbox_and_key()
+  {
+#ifdef RLBOX_EMBEDDER_PROVIDES_TLS_STATIC_VARIABLES
+    auto& thread_data = *get_rlbox_wasm2c_sandbox_thread_data();
+#endif
+    auto sandbox = thread_data.sandbox;
+    auto callback_num = thread_data.last_callback_invoked;
+    void* key = sandbox->callback_unique_keys[callback_num];
+    return std::make_pair(sandbox, key);
+  }
+
+  template<typename T_Ret, typename... T_Args>
+  inline void impl_unregister_callback(void* key)
+  {
+    bool found = false;
+    uint32_t i = 0;
+    {
+      RLBOX_ACQUIRE_UNIQUE_GUARD(lock, callback_mutex);
+      for (; i < MAX_CALLBACKS; i++) {
+        if (callback_unique_keys[i] == key) {
+          const uint32_t slot_number = callback_slot_assignment[i];
+          wasm_rt_funcref_t func_val{ 0 };
+          sandbox_callback_table.data[slot_number] = func_val;
+
+          callback_unique_keys[i] = nullptr;
+          callbacks[i] = nullptr;
+          callback_slot_assignment[i] = 0;
+          found = true;
+          break;
+        }
+      }
+    }
+
+    detail::dynamic_check(
+      found, "Internal error: Could not find callback to unregister");
+
+    return;
+  }
+};
+
+} // namespace rlbox
diff --git a/third_party/rlbox_wasm2c_sandbox/include/rlbox_wasm2c_tls.hpp b/third_party/rlbox_wasm2c_sandbox/include/rlbox_wasm2c_tls.hpp
new file mode 100644
index 0000000000..b87ac7bf5f
--- /dev/null
+++ b/third_party/rlbox_wasm2c_sandbox/include/rlbox_wasm2c_tls.hpp
@@ -0,0 +1,33 @@
+#pragma once
+
+#include <stdint.h>
+
+namespace rlbox {
+
+class rlbox_wasm2c_sandbox;
+
+struct rlbox_wasm2c_sandbox_thread_data
+{
+  rlbox_wasm2c_sandbox* sandbox;
+  uint32_t last_callback_invoked;
+};
+
+#ifdef RLBOX_EMBEDDER_PROVIDES_TLS_STATIC_VARIABLES
+
+rlbox_wasm2c_sandbox_thread_data* get_rlbox_wasm2c_sandbox_thread_data();
+
+#  define RLBOX_WASM2C_SANDBOX_STATIC_VARIABLES()                              \
+    thread_local rlbox::rlbox_wasm2c_sandbox_thread_data                       \
+      rlbox_wasm2c_sandbox_thread_info{ 0, 0 };                                \
+                                                                               \
+    namespace rlbox {                                                          \
+      rlbox_wasm2c_sandbox_thread_data* get_rlbox_wasm2c_sandbox_thread_data() \
+      {                                                                        \
+        return &rlbox_wasm2c_sandbox_thread_info;                              \
+      }                                                                        \
+    }                                                                          \
+    static_assert(true, "Enforce semi-colon")
+
+#endif
+
+} // namespace rlbox
diff --git a/third_party/rlbox_wasm2c_sandbox/include/wasm2c_rt_mem.h b/third_party/rlbox_wasm2c_sandbox/include/wasm2c_rt_mem.h
new file mode 100644
index 0000000000..e61b9fa3eb
--- /dev/null
+++ b/third_party/rlbox_wasm2c_sandbox/include/wasm2c_rt_mem.h
@@ -0,0 +1,46 @@
+#ifndef WASM_RT_OS_H_
+#define WASM_RT_OS_H_
+
+#include <stdbool.h>
+#include <stddef.h>
+#include <stdint.h>
+#include <time.h>
+
+#include "wasm-rt.h"
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+  typedef struct w2c_env
+  {
+    wasm_rt_memory_t* sandbox_memory_info;
+    wasm_rt_funcref_table_t* sandbox_callback_table;
+  } w2c_env;
+
+  wasm_rt_memory_t* w2c_env_memory(struct w2c_env* instance);
+  wasm_rt_funcref_table_t* w2c_env_0x5F_indirect_function_table(
+    struct w2c_env*);
+
+  typedef struct w2c_mem_capacity
+  {
+    bool is_valid;
+    bool is_mem_32;
+    uint64_t max_pages;
+    uint64_t max_size;
+  } w2c_mem_capacity;
+
+  w2c_mem_capacity get_valid_wasm2c_memory_capacity(uint64_t min_capacity,
+                                                    bool is_mem_32);
+
+  wasm_rt_memory_t create_wasm2c_memory(
+    uint32_t initial_pages,
+    const w2c_mem_capacity* custom_capacity);
+  void destroy_wasm2c_memory(wasm_rt_memory_t* memory);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
diff --git a/third_party/rlbox_wasm2c_sandbox/include/wasm2c_rt_minwasi.h b/third_party/rlbox_wasm2c_sandbox/include/wasm2c_rt_minwasi.h
new file mode 100644
index 0000000000..51542b5d1e
--- /dev/null
+++ b/third_party/rlbox_wasm2c_sandbox/include/wasm2c_rt_minwasi.h
@@ -0,0 +1,38 @@
+#ifndef WASM_RT_MINWASI_H_
+#define WASM_RT_MINWASI_H_
+
+/* A minimum wasi implementation supporting only stdin, stdout, stderr, argv
+ * (upto 100 args) and clock functions. */
+
+#include <stdbool.h>
+#include <stdint.h>
+
+#include "wasm-rt.h"
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+  typedef struct w2c_wasi__snapshot__preview1
+  {
+    wasm_rt_memory_t* instance_memory;
+
+    uint32_t main_argc;
+    const char** main_argv;
+
+    uint32_t env_count;
+    const char** env;
+
+    void* clock_data;
+  } w2c_wasi__snapshot__preview1;
+
+  bool minwasi_init();
+  bool minwasi_init_instance(w2c_wasi__snapshot__preview1* wasi_data);
+  void minwasi_cleanup_instance(w2c_wasi__snapshot__preview1* wasi_data);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
diff --git a/third_party/rlbox_wasm2c_sandbox/src/wasm2c_rt_mem.c b/third_party/rlbox_wasm2c_sandbox/src/wasm2c_rt_mem.c
new file mode 100644
index 0000000000..1bdf6f715c
--- /dev/null
+++ b/third_party/rlbox_wasm2c_sandbox/src/wasm2c_rt_mem.c
@@ -0,0 +1,454 @@
+#include "wasm2c_rt_mem.h"
+#include "wasm-rt.h"
+
+#include <errno.h>
+#include <inttypes.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+enum
+{
+  MMAP_PROT_NONE = 0,
+  MMAP_PROT_READ = 1,
+  MMAP_PROT_WRITE = 2,
+  MMAP_PROT_EXEC = 4
+};
+
+/* Memory map flags */
+enum
+{
+  MMAP_MAP_NONE = 0,
+  /* Put the mapping into 0 to 2 G, supported only on x86_64 */
+  MMAP_MAP_32BIT = 1,
+  /* Don't interpret addr as a hint: place the mapping at exactly
+     that address. */
+  MMAP_MAP_FIXED = 2
+};
+
+// Try reserving an aligned memory space.
+// Returns pointer to allocated space on success, 0 on failure.
+static void* os_mmap_aligned(void* addr,
+                             size_t requested_length,
+                             int prot,
+                             int flags,
+                             size_t alignment,
+                             size_t alignment_offset);
+// Unreserve the memory space
+static void os_munmap(void* addr, size_t size);
+// Allocates and sets the permissions on the previously reserved memory space
+// Returns 0 on success, non zero on failure.
+static int os_mmap_commit(void* curr_heap_end_pointer,
+                          size_t expanded_size,
+                          int prot);
+
+wasm_rt_memory_t* w2c_env_memory(struct w2c_env* instance)
+{
+  return instance->sandbox_memory_info;
+}
+
+wasm_rt_funcref_table_t* w2c_env_0x5F_indirect_function_table(
+  struct w2c_env* instance)
+{
+  return instance->sandbox_callback_table;
+}
+
+#define WASM_PAGE_SIZE 65536
+#define RLBOX_FOUR_GIG 0x100000000ull
+
+#if UINTPTR_MAX == 0xffffffffffffffff
+// Guard page of 4GiB
+#  define WASM_HEAP_GUARD_PAGE_SIZE 0x100000000ull
+// Heap aligned to 4GB
+#  define WASM_HEAP_ALIGNMENT 0x100000000ull
+// By default max heap is 4GB
+#  define WASM_HEAP_DEFAULT_MAX_PAGES 65536
+#elif UINTPTR_MAX == 0xffffffff
+// No guard pages
+#  define WASM_HEAP_GUARD_PAGE_SIZE 0
+// Unaligned heap
+#  define WASM_HEAP_ALIGNMENT 0
+// Default max heap is 16MB
+#  define WASM_HEAP_DEFAULT_MAX_PAGES 256
+#else
+#  error "Unknown pointer size"
+#endif
+
+static uint64_t compute_heap_reserve_space(uint32_t chosen_max_pages)
+{
+  const uint64_t heap_reserve_size =
+    ((uint64_t)chosen_max_pages) * WASM_PAGE_SIZE + WASM_HEAP_GUARD_PAGE_SIZE;
+  return heap_reserve_size;
+}
+
+w2c_mem_capacity get_valid_wasm2c_memory_capacity(uint64_t min_capacity,
+                                                  bool is_mem_32)
+{
+  const w2c_mem_capacity err_val = { false /* is_valid */,
+                                     false /* is_mem_32 */,
+                                     0 /* max_pages */,
+                                     0 /* max_size */ };
+
+  // We do not handle memory 64
+  if (!is_mem_32) {
+    return err_val;
+  }
+
+  const uint64_t default_capacity =
+    ((uint64_t)WASM_HEAP_DEFAULT_MAX_PAGES) * WASM_PAGE_SIZE;
+
+  if (min_capacity <= default_capacity) {
+    // Handle 0 case and small values
+    const w2c_mem_capacity ret = { true /* is_valid */,
+                                   true /* is_mem_32 */,
+                                   WASM_HEAP_DEFAULT_MAX_PAGES /* max_pages */,
+                                   default_capacity /* max_size */ };
+    return ret;
+  } else if (min_capacity > UINT32_MAX) {
+    // Handle out of range values
+    return err_val;
+  }
+
+  const uint64_t page_size_minus_1 = WASM_PAGE_SIZE - 1;
+  // Get number of pages greater than min_capacity
+  const uint64_t capacity_pages = ((min_capacity - 1) / page_size_minus_1) + 1;
+
+  const w2c_mem_capacity ret = { true /* is_valid */,
+                                 true /* is_mem_32 */,
+                                 capacity_pages /* max_pages */,
+                                 capacity_pages *
+                                   WASM_PAGE_SIZE /* max_size */ };
+  return ret;
+}
+
+wasm_rt_memory_t create_wasm2c_memory(uint32_t initial_pages,
+                                      const w2c_mem_capacity* custom_capacity)
+{
+
+  if (custom_capacity && !custom_capacity->is_valid) {
+    wasm_rt_memory_t ret = { 0 };
+    return ret;
+  }
+
+  const uint32_t byte_length = initial_pages * WASM_PAGE_SIZE;
+  const uint64_t chosen_max_pages =
+    custom_capacity ? custom_capacity->max_pages : WASM_HEAP_DEFAULT_MAX_PAGES;
+  const uint64_t heap_reserve_size =
+    compute_heap_reserve_space(chosen_max_pages);
+
+  uint8_t* data = 0;
+  const uint64_t retries = 10;
+  for (uint64_t i = 0; i < retries; i++) {
+    data = (uint8_t*)os_mmap_aligned(0,
+                                     heap_reserve_size,
+                                     MMAP_PROT_NONE,
+                                     MMAP_MAP_NONE,
+                                     WASM_HEAP_ALIGNMENT,
+                                     0 /* alignment_offset */);
+    if (data) {
+      int ret =
+        os_mmap_commit(data, byte_length, MMAP_PROT_READ | MMAP_PROT_WRITE);
+      if (ret != 0) {
+        // failed to set permissions
+        os_munmap(data, heap_reserve_size);
+        data = 0;
+      }
+      break;
+    }
+  }
+
+  wasm_rt_memory_t ret;
+  ret.data = data;
+  ret.max_pages = chosen_max_pages;
+  ret.pages = initial_pages;
+  ret.size = byte_length;
+  return ret;
+}
+
+void destroy_wasm2c_memory(wasm_rt_memory_t* memory)
+{
+  if (memory->data != 0) {
+    const uint64_t heap_reserve_size =
+      compute_heap_reserve_space(memory->max_pages);
+    os_munmap(memory->data, heap_reserve_size);
+    memory->data = 0;
+  }
+}
+
+#undef WASM_HEAP_DEFAULT_MAX_PAGES
+#undef WASM_HEAP_ALIGNMENT
+#undef WASM_HEAP_GUARD_PAGE_SIZE
+#undef RLBOX_FOUR_GIG
+#undef WASM_PAGE_SIZE
+
+// Based on
+// https://web.archive.org/web/20191012035921/http://nadeausoftware.com/articles/2012/01/c_c_tip_how_use_compiler_predefined_macros_detect_operating_system#BSD
+// Check for windows (non cygwin) environment
+#if defined(_WIN32)
+
+#  include <windows.h>
+
+static size_t os_getpagesize()
+{
+  SYSTEM_INFO S;
+  GetNativeSystemInfo(&S);
+  return S.dwPageSize;
+}
+
+static void* win_mmap(void* hint,
+                      size_t size,
+                      int prot,
+                      int flags,
+                      DWORD alloc_flag)
+{
+  DWORD flProtect = PAGE_NOACCESS;
+  size_t request_size, page_size;
+  void* addr;
+
+  page_size = os_getpagesize();
+  request_size = (size + page_size - 1) & ~(page_size - 1);
+
+  if (request_size < size)
+    /* integer overflow */
+    return NULL;
+
+  if (request_size == 0)
+    request_size = page_size;
+
+  if (prot & MMAP_PROT_EXEC) {
+    if (prot & MMAP_PROT_WRITE)
+      flProtect = PAGE_EXECUTE_READWRITE;
+    else
+      flProtect = PAGE_EXECUTE_READ;
+  } else if (prot & MMAP_PROT_WRITE)
+    flProtect = PAGE_READWRITE;
+  else if (prot & MMAP_PROT_READ)
+    flProtect = PAGE_READONLY;
+
+  addr = VirtualAlloc((LPVOID)hint, request_size, alloc_flag, flProtect);
+  return addr;
+}
+
+static void* os_mmap_aligned(void* addr,
+                             size_t requested_length,
+                             int prot,
+                             int flags,
+                             size_t alignment,
+                             size_t alignment_offset)
+{
+  size_t padded_length = requested_length + alignment + alignment_offset;
+  uintptr_t unaligned =
+    (uintptr_t)win_mmap(addr, padded_length, prot, flags, MEM_RESERVE);
+
+  if (!unaligned) {
+    return (void*)unaligned;
+  }
+
+  // Round up the next address that has addr % alignment = 0
+  const size_t alignment_corrected = alignment == 0 ? 1 : alignment;
+  uintptr_t aligned_nonoffset =
+    (unaligned + (alignment_corrected - 1)) & ~(alignment_corrected - 1);
+
+  // Currently offset 0 is aligned according to alignment
+  // Alignment needs to be enforced at the given offset
+  uintptr_t aligned = 0;
+  if ((aligned_nonoffset - alignment_offset) >= unaligned) {
+    aligned = aligned_nonoffset - alignment_offset;
+  } else {
+    aligned = aligned_nonoffset - alignment_offset + alignment;
+  }
+
+  if (aligned == unaligned && padded_length == requested_length) {
+    return (void*)aligned;
+  }
+
+  // Sanity check
+  if (aligned < unaligned ||
+      (aligned + (requested_length - 1)) > (unaligned + (padded_length - 1)) ||
+      (aligned + alignment_offset) % alignment_corrected != 0) {
+    os_munmap((void*)unaligned, padded_length);
+    return NULL;
+  }
+
+  // windows does not support partial unmapping, so unmap and remap
+  os_munmap((void*)unaligned, padded_length);
+  aligned = (uintptr_t)win_mmap(
+    (void*)aligned, requested_length, prot, flags, MEM_RESERVE);
+  return (void*)aligned;
+}
+
+static void os_munmap(void* addr, size_t size)
+{
+  DWORD alloc_flag = MEM_RELEASE;
+  if (addr) {
+    if (VirtualFree(addr, 0, alloc_flag) == 0) {
+      size_t page_size = os_getpagesize();
+      size_t request_size = (size + page_size - 1) & ~(page_size - 1);
+      int64_t curr_err = errno;
+      printf("os_munmap error addr:%p, size:0x%zx, errno:%" PRId64 "\n",
+             addr,
+             request_size,
+             curr_err);
+    }
+  }
+}
+
+static int os_mmap_commit(void* curr_heap_end_pointer,
+                          size_t expanded_size,
+                          int prot)
+{
+  uintptr_t addr = (uintptr_t)win_mmap(
+    curr_heap_end_pointer, expanded_size, prot, MMAP_MAP_NONE, MEM_COMMIT);
+  int ret = addr ? 0 : -1;
+  return ret;
+}
+
+#elif !defined(_WIN32) && (defined(__unix__) || defined(__unix) ||             \
+                           (defined(__APPLE__) && defined(__MACH__)))
+
+#  include <sys/mman.h>
+#  include <unistd.h>
+
+static size_t os_getpagesize()
+{
+  return getpagesize();
+}
+
+static void* os_mmap(void* hint, size_t size, int prot, int flags)
+{
+  int map_prot = PROT_NONE;
+  int map_flags = MAP_ANONYMOUS | MAP_PRIVATE;
+  uint64_t request_size, page_size;
+  void* addr;
+
+  page_size = (uint64_t)os_getpagesize();
+  request_size = (size + page_size - 1) & ~(page_size - 1);
+
+  if ((size_t)request_size < size)
+    /* integer overflow */
+    return NULL;
+
+  if (request_size > 16 * (uint64_t)UINT32_MAX)
+    /* At most 16 G is allowed */
+    return NULL;
+
+  if (prot & MMAP_PROT_READ)
+    map_prot |= PROT_READ;
+
+  if (prot & MMAP_PROT_WRITE)
+    map_prot |= PROT_WRITE;
+
+  if (prot & MMAP_PROT_EXEC)
+    map_prot |= PROT_EXEC;
+
+#  if defined(BUILD_TARGET_X86_64) || defined(BUILD_TARGET_AMD_64)
+#    ifndef __APPLE__
+  if (flags & MMAP_MAP_32BIT)
+    map_flags |= MAP_32BIT;
+#    endif
+#  endif
+
+  if (flags & MMAP_MAP_FIXED)
+    map_flags |= MAP_FIXED;
+
+  addr = mmap(hint, request_size, map_prot, map_flags, -1, 0);
+
+  if (addr == MAP_FAILED)
+    return NULL;
+
+  return addr;
+}
+
+static void* os_mmap_aligned(void* addr,
+                             size_t requested_length,
+                             int prot,
+                             int flags,
+                             size_t alignment,
+                             size_t alignment_offset)
+{
+  size_t padded_length = requested_length + alignment + alignment_offset;
+  uintptr_t unaligned = (uintptr_t)os_mmap(addr, padded_length, prot, flags);
+
+  if (!unaligned) {
+    return (void*)unaligned;
+  }
+
+  // Round up the next address that has addr % alignment = 0
+  const size_t alignment_corrected = alignment == 0 ? 1 : alignment;
+  uintptr_t aligned_nonoffset =
+    (unaligned + (alignment_corrected - 1)) & ~(alignment_corrected - 1);
+
+  // Currently offset 0 is aligned according to alignment
+  // Alignment needs to be enforced at the given offset
+  uintptr_t aligned = 0;
+  if ((aligned_nonoffset - alignment_offset) >= unaligned) {
+    aligned = aligned_nonoffset - alignment_offset;
+  } else {
+    aligned = aligned_nonoffset - alignment_offset + alignment;
+  }
+
+  // Sanity check
+  if (aligned < unaligned ||
+      (aligned + (requested_length - 1)) > (unaligned + (padded_length - 1)) ||
+      (aligned + alignment_offset) % alignment_corrected != 0) {
+    os_munmap((void*)unaligned, padded_length);
+    return NULL;
+  }
+
+  {
+    size_t unused_front = aligned - unaligned;
+    if (unused_front != 0) {
+      os_munmap((void*)unaligned, unused_front);
+    }
+  }
+
+  {
+    size_t unused_back =
+      (unaligned + (padded_length - 1)) - (aligned + (requested_length - 1));
+    if (unused_back != 0) {
+      os_munmap((void*)(aligned + requested_length), unused_back);
+    }
+  }
+
+  return (void*)aligned;
+}
+
+static void os_munmap(void* addr, size_t size)
+{
+  uint64_t page_size = (uint64_t)os_getpagesize();
+  uint64_t request_size = (size + page_size - 1) & ~(page_size - 1);
+
+  if (addr) {
+    if (munmap(addr, request_size)) {
+      printf("os_munmap error addr:%p, size:0x%" PRIx64 ", errno:%d\n",
+             addr,
+             request_size,
+             errno);
+    }
+  }
+}
+
+static int os_mmap_commit(void* addr, size_t size, int prot)
+{
+  int map_prot = PROT_NONE;
+  uint64_t page_size = (uint64_t)os_getpagesize();
+  uint64_t request_size = (size + page_size - 1) & ~(page_size - 1);
+
+  if (!addr)
+    return 0;
+
+  if (prot & MMAP_PROT_READ)
+    map_prot |= PROT_READ;
+
+  if (prot & MMAP_PROT_WRITE)
+    map_prot |= PROT_WRITE;
+
+  if (prot & MMAP_PROT_EXEC)
+    map_prot |= PROT_EXEC;
+
+  return mprotect(addr, request_size, map_prot);
+}
+
+#else
+#  error "Unknown OS"
+#endif
diff --git a/third_party/rlbox_wasm2c_sandbox/src/wasm2c_rt_minwasi.c b/third_party/rlbox_wasm2c_sandbox/src/wasm2c_rt_minwasi.c
new file mode 100644
index 0000000000..9289cd75b1
--- /dev/null
+++ b/third_party/rlbox_wasm2c_sandbox/src/wasm2c_rt_minwasi.c
@@ -0,0 +1,799 @@
+/* A minimum wasi implementation supporting only stdin, stdout, stderr, argv
+ * (upto 1000 args), env (upto 1000 env), and clock functions. */
+
+#include <assert.h>
+#include <stdbool.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+
+#ifdef _WIN32
+#  include <windows.h>
+#endif
+
+#if defined(__APPLE__) && defined(__MACH__)
+// Macs priors to OSX 10.12 don't have the clock functions. So we will use mac
+// specific options
+#  include <mach/mach_time.h>
+#  include <sys/time.h>
+#endif
+
+#include "wasm-rt.h"
+#include "wasm2c_rt_minwasi.h"
+
+#ifndef WASM_RT_CORE_TYPES_DEFINED
+#  define WASM_RT_CORE_TYPES_DEFINED
+typedef uint8_t u8;
+typedef int8_t s8;
+typedef uint16_t u16;
+typedef int16_t s16;
+typedef uint32_t u32;
+typedef int32_t s32;
+typedef uint64_t u64;
+typedef int64_t s64;
+typedef float f32;
+typedef double f64;
+#endif
+
+#ifndef UNLIKELY
+#  if defined(__GNUC__)
+#    define UNLIKELY(x) __builtin_expect(!!(x), 0)
+#    define LIKELY(x) __builtin_expect(!!(x), 1)
+#  else
+#    define UNLIKELY(x) (x)
+#    define LIKELY(x) (x)
+#  endif
+#endif
+
+#define TRAP(x) wasm_rt_trap(WASM_RT_TRAP_##x)
+
+#define WASI_MEMACCESS(mem, a) ((void*)&(mem->data[a]))
+
+#define WASI_MEMCHECK_SIZE(mem, a, sz)                                         \
+  if (UNLIKELY(((u64)(a)) + sz > mem->size))                                   \
+  TRAP(OOB)
+
+#define WASI_CHECK_COPY(mem, a, sz, src)                                       \
+  do {                                                                         \
+    WASI_MEMCHECK_SIZE(mem, a, sz);                                            \
+    memcpy(WASI_MEMACCESS(mem, a), src, sz);                                   \
+  } while (0)
+
+#define WASI_MEMCHECK(mem, a, t) WASI_MEMCHECK_SIZE(mem, a, sizeof(t))
+
+#define DEFINE_WASI_LOAD(name, t1, t2, t3)                                     \
+  static inline t3 name(wasm_rt_memory_t* mem, u64 addr)                       \
+  {                                                                            \
+    WASI_MEMCHECK(mem, addr, t1);                                              \
+    t1 result;                                                                 \
+    memcpy(&result, WASI_MEMACCESS(mem, addr), sizeof(t1));                    \
+    return (t3)(t2)result;                                                     \
+  }
+
+#define DEFINE_WASI_STORE(name, t1, t2)                                        \
+  static inline void name(wasm_rt_memory_t* mem, u64 addr, t2 value)           \
+  {                                                                            \
+    WASI_MEMCHECK(mem, addr, t1);                                              \
+    t1 wrapped = (t1)value;                                                    \
+    memcpy(WASI_MEMACCESS(mem, addr), &wrapped, sizeof(t1));                   \
+  }
+
+DEFINE_WASI_LOAD(wasm_i32_load, u32, u32, u32);
+DEFINE_WASI_STORE(wasm_i32_store, u32, u32);
+DEFINE_WASI_STORE(wasm_i64_store, u64, u64);
+
+static bool safe_add_u32(u32* ret, u32 a, u32 b)
+{
+  if (UINT32_MAX - a < b) {
+    *ret = 0;
+    return false;
+  }
+  *ret = a + b;
+  return true;
+}
+
+// clang-format off
+
+////////////// Supported WASI APIs
+//
+// Clock operations
+// ----------------
+// errno_t clock_res_get(void* ctx, clockid_t clock_id, timestamp_t* resolution);
+// errno_t clock_time_get(void* ctx, clockid_t clock_id, timestamp_t precision, timestamp_t* time);
+//
+// File operations
+// ----------------
+// Only the default descriptors of STDIN, STDOUT, STDERR are allowed by the
+// runtime.
+//
+// errno_t fd_prestat_get(void* ctx, fd_t fd, prestat_t* buf);
+// errno_t fd_read(void* ctx, fd_t fd, const iovec_t* iovs, size_t iovs_len, size_t* nread);
+// errno_t fd_write(void* ctx, fd_t fd, const ciovec_t* iovs, size_t iovs_len, size_t* nwritten);
+
+////////////// Partially supported WASI APIs
+//
+// App environment operations
+// --------------------------
+// These APIs work but return an empty buffer
+//
+// errno_t args_get(void* ctx, char** argv, char* argv_buf);
+// errno_t args_sizes_get(void* ctx, size_t* argc, size_t* argv_buf_size);
+// errno_t environ_get(void* ctx, char** environment, char* environ_buf);
+// errno_t environ_sizes_get(void* ctx, size_t* environ_count, size_t* environ_buf_size);
+//
+// Proc exit operation
+// -------------------
+// This is a no-op here in this runtime as the focus is on library
+// sandboxing
+//
+// errno_t proc_exit(void* ctx, exitcode_t rval);
+
+////////////// Unsupported WASI APIs
+// errno_t fd_advise(void* ctx, fd_t fd, filesize_t offset, filesize_t len, advice_t advice);
+// errno_t fd_allocate(void* ctx, fd_t fd, filesize_t offset, filesize_t len);
+// errno_t fd_close(void* ctx, fd_t fd);
+// errno_t fd_datasync(void* ctx, fd_t fd);
+// errno_t fd_fdstat_get(void* ctx, fd_t fd, fdstat_t* buf);
+// errno_t fd_fdstat_set_flags(void* ctx, fd_t fd, fdflags_t flags);
+// errno_t fd_fdstat_set_rights(void* ctx, fd_t fd, rights_t fs_rights_base, rights_t fs_rights_inheriting);
+// errno_t fd_filestat_get(void* ctx, fd_t fd, filestat_t* buf);
+// errno_t fd_filestat_set_size(void* ctx, fd_t fd, filesize_t st_size);
+// errno_t fd_filestat_set_times(void* ctx, fd_t fd, timestamp_t st_atim, timestamp_t st_mtim, fstflags_t fst_flags);
+// errno_t fd_pread(void* ctx, fd_t fd, const iovec_t* iovs, size_t iovs_len, filesize_t offset, size_t* nread);
+// errno_t fd_prestat_dir_name(void* ctx, fd_t fd, char* path, size_t path_len);
+// errno_t fd_pwrite(void* ctx, fd_t fd, const ciovec_t* iovs, size_t iovs_len, filesize_t offset, size_t* nwritten);
+// errno_t fd_readdir(void* ctx, fd_t fd, void* buf, size_t buf_len, dircookie_t cookie, size_t* bufused);
+// errno_t fd_renumber(void* ctx, fd_t from, fd_t to);
+// errno_t fd_seek(void* ctx, fd_t fd, filedelta_t offset, whence_t whence, filesize_t* newoffset);
+// errno_t fd_sync(void* ctx, fd_t fd);
+// errno_t fd_tell(void* ctx, fd_t fd, filesize_t* offset);
+// errno_t path_create_directory(void* ctx, fd_t fd, const char* path, size_t path_len);
+// errno_t path_filestat_get(void* ctx, fd_t fd, lookupflags_t flags, const char* path, size_t path_len, filestat_t* buf);
+// errno_t path_filestat_set_times(void* ctx, fd_t fd, lookupflags_t flags, const char* path, size_t path_len, timestamp_t st_atim, timestamp_t st_mtim, fstflags_t fst_flags);
+// errno_t path_link(void* ctx, fd_t old_fd, lookupflags_t old_flags, const char* old_path, size_t old_path_len, fd_t new_fd, const char* new_path, size_t new_path_len);
+// errno_t path_open(void* ctx, fd_t dirfd, lookupflags_t dirflags, const char* path, size_t path_len, oflags_t o_flags, rights_t fs_rights_base, rights_t fs_rights_inheriting, fdflags_t fs_flags, fd_t* fd);
+// errno_t path_readlink(void* ctx, fd_t fd, const char* path, size_t path_len, char* buf, size_t buf_len, size_t* bufused);
+// errno_t path_remove_directory(void* ctx, fd_t fd, const char* path, size_t path_len);
+// errno_t path_rename(void* ctx, fd_t old_fd, const char* old_path, size_t old_path_len, fd_t new_fd, const char* new_path, size_t new_path_len);
+// errno_t path_symlink(void* ctx, const char* old_path, size_t old_path_len, fd_t fd, const char* new_path, size_t new_path_len);
+// errno_t path_unlink_file(void* ctx, fd_t fd, const char* path, size_t path_len);
+// errno_t poll_oneoff(void* ctx, const subscription_t* in, event_t* out, size_t nsubscriptions, size_t* nevents);
+// errno_t proc_raise(void* ctx, signal_t sig);
+// errno_t random_get(void* ctx, void* buf, size_t buf_len);
+// errno_t sched_yield(t* uvwasi);
+// errno_t sock_accept(void* ctx, fd_t sock, flags_t fdflags, fd* fd);
+// errno_t sock_recv(void* ctx, fd_t sock, const iovec_t* ri_data, size_t ri_data_len, riflags_t ri_flags, size_t* ro_datalen, roflags_t* ro_flags);
+// errno_t sock_send(void* ctx, fd_t sock, const ciovec_t* si_data, size_t si_data_len, siflags_t si_flags, size_t* so_datalen);
+// errno_t sock_shutdown(void* ctx, fd_t sock, sdflags_t how);
+
+// clang-format on
+
+// Success
+#define WASI_SUCCESS 0
+// Bad file descriptor.
+#define WASI_BADF_ERROR 8
+// Invalid argument
+#define WASI_INVAL_ERROR 28
+// Operation not permitted.
+#define WASI_PERM_ERROR 63
+// Syscall not implemented
+#define WASI_NOSYS_ERROR 53
+
+#define WASI_RET_ERR_ON_FAIL(exp)                                              \
+  if (!(exp)) {                                                                \
+    return WASI_INVAL_ERROR;                                                   \
+  }
+
+/////////////////////////////////////////////////////////////
+// Clock operations
+/////////////////////////////////////////////////////////////
+
+#if defined(_WIN32)
+
+typedef struct
+{
+  LARGE_INTEGER counts_per_sec; /* conversion factor */
+} wasi_win_clock_info_t;
+
+static wasi_win_clock_info_t g_wasi_win_clock_info;
+static int g_os_data_initialized = 0;
+
+static bool os_clock_init()
+{
+  // From here:
+  // https://stackoverflow.com/questions/5404277/porting-clock-gettime-to-windows/38212960#38212960
+  if (QueryPerformanceFrequency(&g_wasi_win_clock_info.counts_per_sec) == 0) {
+    return false;
+  }
+  g_os_data_initialized = 1;
+  return true;
+}
+
+static bool os_clock_init_instance(void** clock_data_pointer)
+{
+  if (!g_os_data_initialized) {
+    os_clock_init();
+  }
+
+  wasi_win_clock_info_t* alloc =
+    (wasi_win_clock_info_t*)malloc(sizeof(wasi_win_clock_info_t));
+  if (!alloc) {
+    return false;
+  }
+  memcpy(alloc, &g_wasi_win_clock_info, sizeof(wasi_win_clock_info_t));
+  *clock_data_pointer = alloc;
+  return true;
+}
+
+static void os_clock_cleanup_instance(void** clock_data_pointer)
+{
+  if (*clock_data_pointer == 0) {
+    free(*clock_data_pointer);
+    *clock_data_pointer = 0;
+  }
+}
+
+static int os_clock_gettime(void* clock_data,
+                            int clock_id,
+                            struct timespec* out_struct)
+{
+  wasi_win_clock_info_t* alloc = (wasi_win_clock_info_t*)clock_data;
+
+  LARGE_INTEGER count;
+  (void)clock_id;
+
+  if (alloc->counts_per_sec.QuadPart <= 0 ||
+      QueryPerformanceCounter(&count) == 0) {
+    return -1;
+  }
+
+#  define BILLION 1000000000LL
+  out_struct->tv_sec = count.QuadPart / alloc->counts_per_sec.QuadPart;
+  out_struct->tv_nsec =
+    ((count.QuadPart % alloc->counts_per_sec.QuadPart) * BILLION) /
+    alloc->counts_per_sec.QuadPart;
+#  undef BILLION
+
+  return 0;
+}
+
+static int os_clock_getres(void* clock_data,
+                           int clock_id,
+                           struct timespec* out_struct)
+{
+  (void)clock_id;
+  out_struct->tv_sec = 0;
+  out_struct->tv_nsec = 1000;
+  return 0;
+}
+
+#elif defined(__APPLE__) && defined(__MACH__)
+
+typedef struct
+{
+  mach_timebase_info_data_t timebase; /* numer = 0, denom = 0 */
+  struct timespec inittime; /* nanoseconds since 1-Jan-1970 to init() */
+  uint64_t initclock;       /* ticks since boot to init() */
+} wasi_mac_clock_info_t;
+
+static wasi_mac_clock_info_t g_wasi_mac_clock_info;
+static int g_os_data_initialized = 0;
+
+static bool os_clock_init()
+{
+  // From here:
+  // https://stackoverflow.com/questions/5167269/clock-gettime-alternative-in-mac-os-x/21352348#21352348
+  if (mach_timebase_info(&g_wasi_mac_clock_info.timebase) != 0) {
+    return false;
+  }
+
+  // microseconds since 1 Jan 1970
+  struct timeval micro;
+  if (gettimeofday(&micro, NULL) != 0) {
+    return false;
+  }
+
+  g_wasi_mac_clock_info.initclock = mach_absolute_time();
+
+  g_wasi_mac_clock_info.inittime.tv_sec = micro.tv_sec;
+  g_wasi_mac_clock_info.inittime.tv_nsec = micro.tv_usec * 1000;
+
+  g_os_data_initialized = 1;
+  return true;
+}
+
+static bool os_clock_init_instance(void** clock_data_pointer)
+{
+  if (!g_os_data_initialized) {
+    os_clock_init();
+  }
+
+  wasi_mac_clock_info_t* alloc =
+    (wasi_mac_clock_info_t*)malloc(sizeof(wasi_mac_clock_info_t));
+  if (!alloc) {
+    return false;
+  }
+  memcpy(alloc, &g_wasi_mac_clock_info, sizeof(wasi_mac_clock_info_t));
+  *clock_data_pointer = alloc;
+  return true;
+}
+
+static void os_clock_cleanup_instance(void** clock_data_pointer)
+{
+  if (*clock_data_pointer == 0) {
+    free(*clock_data_pointer);
+    *clock_data_pointer = 0;
+  }
+}
+
+static int os_clock_gettime(void* clock_data,
+                            int clock_id,
+                            struct timespec* out_struct)
+{
+  int ret = 0;
+  wasi_mac_clock_info_t* alloc = (wasi_mac_clock_info_t*)clock_data;
+
+  // From here:
+  // https://stackoverflow.com/questions/5167269/clock-gettime-alternative-in-mac-os-x/21352348#21352348
+
+  (void)clock_id;
+  // ticks since init
+  uint64_t clock = mach_absolute_time() - alloc->initclock;
+  // nanoseconds since init
+  uint64_t nano = clock * (uint64_t)(alloc->timebase.numer) /
+                  (uint64_t)(alloc->timebase.denom);
+  *out_struct = alloc->inittime;
+
+#  define BILLION 1000000000L
+  out_struct->tv_sec += nano / BILLION;
+  out_struct->tv_nsec += nano % BILLION;
+  // normalize
+  out_struct->tv_sec += out_struct->tv_nsec / BILLION;
+  out_struct->tv_nsec = out_struct->tv_nsec % BILLION;
+#  undef BILLION
+  return ret;
+}
+
+static int os_clock_getres(void* clock_data,
+                           int clock_id,
+                           struct timespec* out_struct)
+{
+  int ret = 0;
+  (void)clock_id;
+  out_struct->tv_sec = 0;
+  out_struct->tv_nsec = 1;
+  return ret;
+}
+
+#else
+
+static bool os_clock_init()
+{
+  return true;
+}
+
+static bool os_clock_init_instance(void** clock_data_pointer)
+{
+  (void)clock_data_pointer;
+  return true;
+}
+
+static void os_clock_cleanup_instance(void** clock_data_pointer)
+{
+  (void)clock_data_pointer;
+}
+
+static int os_clock_gettime(void* clock_data,
+                            int clock_id,
+                            struct timespec* out_struct)
+{
+  (void)clock_data;
+  int ret = clock_gettime(clock_id, out_struct);
+  return ret;
+}
+
+static int os_clock_getres(void* clock_data,
+                           int clock_id,
+                           struct timespec* out_struct)
+{
+  (void)clock_data;
+  int ret = clock_getres(clock_id, out_struct);
+  return ret;
+}
+
+#endif
+
+#define WASM_CLOCK_REALTIME 0
+#define WASM_CLOCK_MONOTONIC 1
+#define WASM_CLOCK_PROCESS_CPUTIME 2
+#define WASM_CLOCK_THREAD_CPUTIME_ID 3
+
+static int check_clock(u32 clock_id)
+{
+  return clock_id == WASM_CLOCK_REALTIME || clock_id == WASM_CLOCK_MONOTONIC ||
+         clock_id == WASM_CLOCK_PROCESS_CPUTIME ||
+         clock_id == WASM_CLOCK_THREAD_CPUTIME_ID;
+}
+
+// out is a pointer to a u64 timestamp in nanoseconds
+// https://github.com/WebAssembly/WASI/blob/main/phases/snapshot/docs.md#-timestamp-u64
+u32 w2c_wasi__snapshot__preview1_clock_time_get(
+  w2c_wasi__snapshot__preview1* wasi_data,
+  u32 clock_id,
+  u64 precision,
+  u32 out)
+{
+  if (!check_clock(clock_id)) {
+    return WASI_INVAL_ERROR;
+  }
+
+  struct timespec out_struct;
+  int ret = os_clock_gettime(wasi_data->clock_data, clock_id, &out_struct);
+  u64 result =
+    ((u64)out_struct.tv_sec) * 1000 * 1000 * 1000 + ((u64)out_struct.tv_nsec);
+  wasm_i64_store(wasi_data->instance_memory, out, result);
+  return ret;
+}
+
+u32 w2c_wasi__snapshot__preview1_clock_res_get(
+  w2c_wasi__snapshot__preview1* wasi_data,
+  u32 clock_id,
+  u32 out)
+{
+  if (!check_clock(clock_id)) {
+    return WASI_INVAL_ERROR;
+  }
+
+  struct timespec out_struct;
+  int ret = os_clock_getres(wasi_data->clock_data, clock_id, &out_struct);
+  u64 result =
+    ((u64)out_struct.tv_sec) * 1000 * 1000 * 1000 + ((u64)out_struct.tv_nsec);
+  wasm_i64_store(wasi_data->instance_memory, out, result);
+  return ret;
+}
+
+/////////////////////////////////////////////////////////////
+////////// File operations
+/////////////////////////////////////////////////////////////
+
+// Only allow stdin (0), stdout (1), stderr(2)
+
+#define WASM_STDIN 0
+#define WASM_STDOUT 1
+#define WASM_STDERR 2
+
+u32 w2c_wasi__snapshot__preview1_fd_prestat_get(
+  w2c_wasi__snapshot__preview1* wasi_data,
+  u32 fd,
+  u32 prestat)
+{
+  if (fd == WASM_STDIN || fd == WASM_STDOUT || fd == WASM_STDERR) {
+    return WASI_PERM_ERROR;
+  }
+  return WASI_BADF_ERROR;
+}
+
+u32 w2c_wasi__snapshot__preview1_fd_write(
+  w2c_wasi__snapshot__preview1* wasi_data,
+  u32 fd,
+  u32 iov,
+  u32 iovcnt,
+  u32 pnum)
+{
+  if (fd != WASM_STDOUT && fd != WASM_STDERR) {
+    return WASI_BADF_ERROR;
+  }
+
+  u32 num = 0;
+  for (u32 i = 0; i < iovcnt; i++) {
+    u32 ptr = wasm_i32_load(wasi_data->instance_memory, iov + i * 8);
+    u32 len = wasm_i32_load(wasi_data->instance_memory, iov + i * 8 + 4);
+
+    WASI_MEMCHECK_SIZE(wasi_data->instance_memory, ptr, len);
+
+    size_t result = fwrite(WASI_MEMACCESS(wasi_data->instance_memory, ptr),
+                           1 /* size */,
+                           len /* n */,
+                           fd == WASM_STDOUT ? stdout : stderr);
+
+    // Guaranteed by fwrite
+    assert(result <= len);
+
+    WASI_RET_ERR_ON_FAIL(safe_add_u32(&num, num, (u32)result));
+
+    if (((u32)result) != len) {
+      wasm_i32_store(wasi_data->instance_memory, pnum, num);
+      return WASI_PERM_ERROR;
+    }
+  }
+
+  wasm_i32_store(wasi_data->instance_memory, pnum, num);
+  return WASI_SUCCESS;
+}
+
+u32 w2c_wasi__snapshot__preview1_fd_read(
+  w2c_wasi__snapshot__preview1* wasi_data,
+  u32 fd,
+  u32 iov,
+  u32 iovcnt,
+  u32 pnum)
+{
+  if (fd != WASM_STDIN) {
+    return WASI_BADF_ERROR;
+  }
+
+  u32 num = 0;
+  for (u32 i = 0; i < iovcnt; i++) {
+    u32 ptr = wasm_i32_load(wasi_data->instance_memory, iov + i * 8);
+    u32 len = wasm_i32_load(wasi_data->instance_memory, iov + i * 8 + 4);
+
+    WASI_MEMCHECK_SIZE(wasi_data->instance_memory, ptr, len);
+    size_t result = fread(WASI_MEMACCESS(wasi_data->instance_memory, ptr),
+                          1 /* size */,
+                          len /* n */,
+                          stdin);
+
+    // Guaranteed by fwrite
+    assert(result <= len);
+
+    WASI_RET_ERR_ON_FAIL(safe_add_u32(&num, num, (u32)result));
+
+    if (((u32)result) != len) {
+      break; // nothing more to read
+    }
+  }
+  wasm_i32_store(wasi_data->instance_memory, pnum, num);
+  return WASI_SUCCESS;
+}
+
+/////////////////////////////////////////////////////////////
+// App environment operations
+/////////////////////////////////////////////////////////////
+
+#define ARGV_AND_ENV_LIMIT 1000
+
+static u32 strings_sizes_get(wasm_rt_memory_t* instance_memory,
+                             const char* name,
+                             u32 p_str_count,
+                             u32 p_str_buff_size,
+                             u32 string_count,
+                             const char** strings)
+{
+  u32 chosen_count = string_count;
+  if (chosen_count > ARGV_AND_ENV_LIMIT) {
+    chosen_count = ARGV_AND_ENV_LIMIT;
+    printf("Truncated %s args to %d\n", name, ARGV_AND_ENV_LIMIT);
+  }
+
+  u32 curr_buf_size = 0;
+  for (u32 i = 0; i < chosen_count; i++) {
+    size_t original_len = strlen(strings[i]);
+    // len has to be at most u32 - 1
+    WASI_RET_ERR_ON_FAIL(original_len < (size_t)UINT32_MAX);
+
+    u32 len = (u32)original_len;
+    u32 len_plus_nullchar = len + 1;
+
+    WASI_RET_ERR_ON_FAIL(
+      safe_add_u32(&curr_buf_size, curr_buf_size, len_plus_nullchar));
+  }
+
+  wasm_i32_store(instance_memory, p_str_count, chosen_count);
+  wasm_i32_store(instance_memory, p_str_buff_size, curr_buf_size);
+  return WASI_SUCCESS;
+}
+
+static u32 strings_get(wasm_rt_memory_t* instance_memory,
+                       const char* name,
+                       u32 p_str_arr,
+                       u32 p_str_buf,
+                       u32 string_count,
+                       const char** strings)
+{
+  u32 chosen_count = string_count;
+  if (chosen_count > ARGV_AND_ENV_LIMIT) {
+    chosen_count = ARGV_AND_ENV_LIMIT;
+    // Warning is already printed in get_size
+  }
+
+  u32 curr_buf_loc = 0;
+
+  for (u32 i = 0; i < chosen_count; i++) {
+    // Implement: p_str_arr[i] = p_str_buf[curr_buf_loc]
+    u32 target_argv_i_ref;
+    WASI_RET_ERR_ON_FAIL(safe_add_u32(&target_argv_i_ref, p_str_arr, i * 4));
+
+    u32 target_buf_curr_ref;
+    WASI_RET_ERR_ON_FAIL(
+      safe_add_u32(&target_buf_curr_ref, p_str_buf, curr_buf_loc));
+
+    wasm_i32_store(instance_memory, target_argv_i_ref, target_buf_curr_ref);
+
+    // Implement: strcpy(p_str_buf[curr_buf_loc], strings[i]);
+    size_t original_len = strlen(strings[i]);
+    // len has to be at most u32 - 1
+    WASI_RET_ERR_ON_FAIL(original_len < (size_t)UINT32_MAX);
+
+    u32 len = (u32)original_len;
+    u32 len_plus_nullchar = len + 1;
+
+    WASI_CHECK_COPY(
+      instance_memory, target_buf_curr_ref, len_plus_nullchar, strings[i]);
+    // Implement: curr_buf_loc += strlen(p_str_buf[curr_buf_loc])
+    WASI_RET_ERR_ON_FAIL(
+      safe_add_u32(&curr_buf_loc, curr_buf_loc, len_plus_nullchar));
+  }
+  return WASI_SUCCESS;
+}
+
+u32 w2c_wasi__snapshot__preview1_args_sizes_get(
+  w2c_wasi__snapshot__preview1* wasi_data,
+  u32 p_argc,
+  u32 p_argv_buf_size)
+{
+  return strings_sizes_get(wasi_data->instance_memory,
+                           "main",
+                           p_argc,
+                           p_argv_buf_size,
+                           wasi_data->main_argc,
+                           wasi_data->main_argv);
+}
+
+u32 w2c_wasi__snapshot__preview1_args_get(
+  w2c_wasi__snapshot__preview1* wasi_data,
+  u32 p_argv,
+  u32 p_argv_buf)
+{
+  return strings_get(wasi_data->instance_memory,
+                     "main",
+                     p_argv,
+                     p_argv_buf,
+                     wasi_data->main_argc,
+                     wasi_data->main_argv);
+}
+
+u32 w2c_wasi__snapshot__preview1_environ_sizes_get(
+  w2c_wasi__snapshot__preview1* wasi_data,
+  u32 p_env_count,
+  u32 p_env_buf_size)
+{
+  return strings_sizes_get(wasi_data->instance_memory,
+                           "env",
+                           p_env_count,
+                           p_env_buf_size,
+                           wasi_data->env_count,
+                           wasi_data->env);
+}
+
+u32 w2c_wasi__snapshot__preview1_environ_get(
+  w2c_wasi__snapshot__preview1* wasi_data,
+  u32 p_env,
+  u32 p_env_buf)
+{
+  return strings_get(wasi_data->instance_memory,
+                     "env",
+                     p_env,
+                     p_env_buf,
+                     wasi_data->env_count,
+                     wasi_data->env);
+}
+
+/////////////////////////////////////////////////////////////
+// Proc exit operation
+/////////////////////////////////////////////////////////////
+
+void w2c_wasi__snapshot__preview1_proc_exit(
+  w2c_wasi__snapshot__preview1* wasi_data,
+  u32 x)
+{
+#ifdef WASM2C_WASI_TRAP_ON_EXIT
+  TRAP(WASI);
+#else
+  exit(x);
+#endif
+}
+
+/////////////////////////////////////////////////////////////
+////////////// Unsupported WASI APIs
+/////////////////////////////////////////////////////////////
+
+#define STUB_IMPORT_IMPL(ret, name, params)                                    \
+  ret name params { return WASI_NOSYS_ERROR; }
+
+// clang-format off
+
+STUB_IMPORT_IMPL(u32, w2c_wasi__snapshot__preview1_fd_advise,
+                 (w2c_wasi__snapshot__preview1* wasi_data, u32 a, u64 b, u64 c, u32 d));
+STUB_IMPORT_IMPL(u32, w2c_wasi__snapshot__preview1_fd_allocate,
+                 (w2c_wasi__snapshot__preview1* wasi_data, u32 a, u64 b, u64 c));
+STUB_IMPORT_IMPL(u32, w2c_wasi__snapshot__preview1_fd_close,
+                 (w2c_wasi__snapshot__preview1* wasi_data, u32 fd));
+STUB_IMPORT_IMPL(u32, w2c_wasi__snapshot__preview1_fd_datasync,
+                 (w2c_wasi__snapshot__preview1* wasi_data, u32 a));
+STUB_IMPORT_IMPL(u32, w2c_wasi__snapshot__preview1_fd_fdstat_get,
+                 (w2c_wasi__snapshot__preview1* wasi_data, u32 a, u32 b));
+STUB_IMPORT_IMPL(u32, w2c_wasi__snapshot__preview1_fd_fdstat_set_flags,
+                 (w2c_wasi__snapshot__preview1* wasi_data, u32 a, u32 b));
+STUB_IMPORT_IMPL(u32, w2c_wasi__snapshot__preview1_fd_fdstat_set_rights,
+                 (w2c_wasi__snapshot__preview1* wasi_data, u32 a, u64 b, u64 c));
+STUB_IMPORT_IMPL(u32, w2c_wasi__snapshot__preview1_fd_filestat_get,
+                 (w2c_wasi__snapshot__preview1* wasi_data, u32 a, u32 b));
+STUB_IMPORT_IMPL(u32, w2c_wasi__snapshot__preview1_fd_filestat_set_size,
+                 (w2c_wasi__snapshot__preview1* wasi_data, u32 a, u64 b));
+STUB_IMPORT_IMPL(u32, w2c_wasi__snapshot__preview1_fd_filestat_set_times,
+                 (w2c_wasi__snapshot__preview1* wasi_data, u32 a, u64 b, u64 c, u32 d));
+STUB_IMPORT_IMPL(u32, w2c_wasi__snapshot__preview1_fd_pread,
+                 (w2c_wasi__snapshot__preview1* wasi_data, u32 a, u32 b, u32 c, u64 d, u32 e));
+STUB_IMPORT_IMPL(u32, w2c_wasi__snapshot__preview1_fd_prestat_dir_name,
+                 (w2c_wasi__snapshot__preview1* wasi_data, u32 a, u32 b, u32 c));
+STUB_IMPORT_IMPL(u32, w2c_wasi__snapshot__preview1_fd_pwrite,
+                 (w2c_wasi__snapshot__preview1* wasi_data, u32 a, u32 b, u32 c, u64 d, u32 e));
+STUB_IMPORT_IMPL(u32, w2c_wasi__snapshot__preview1_fd_readdir,
+                 (w2c_wasi__snapshot__preview1* wasi_data, u32 a, u32 b, u32 c, u64 d, u32 e));
+STUB_IMPORT_IMPL(u32, w2c_wasi__snapshot__preview1_fd_renumber,
+                 (w2c_wasi__snapshot__preview1* wasi_data, u32 a, u32 b));
+STUB_IMPORT_IMPL(u32, w2c_wasi__snapshot__preview1_fd_seek,
+                 (w2c_wasi__snapshot__preview1* wasi_data, u32 fd, u64 offset, u32 whence, u32 new_offset));
+STUB_IMPORT_IMPL(u32, w2c_wasi__snapshot__preview1_fd_sync,
+                 (w2c_wasi__snapshot__preview1* wasi_data, u32 a));
+STUB_IMPORT_IMPL(u32, w2c_wasi__snapshot__preview1_fd_tell,
+                 (w2c_wasi__snapshot__preview1* wasi_data, u32 a, u32 b));
+STUB_IMPORT_IMPL(u32, w2c_wasi__snapshot__preview1_path_create_directory,
+                 (w2c_wasi__snapshot__preview1* wasi_data, u32 a, u32 b, u32 c));
+STUB_IMPORT_IMPL(u32, w2c_wasi__snapshot__preview1_path_filestat_get,
+                 (w2c_wasi__snapshot__preview1* wasi_data, u32 a, u32 b, u32 c, u32 d, u32 e));
+STUB_IMPORT_IMPL(u32, w2c_wasi__snapshot__preview1_path_filestat_set_times,
+                 (w2c_wasi__snapshot__preview1* wasi_data, u32 a, u32 b, u32 c, u32 d, u64 e, u64 f, u32 g));
+STUB_IMPORT_IMPL(u32, w2c_wasi__snapshot__preview1_path_link,
+                 (w2c_wasi__snapshot__preview1* wasi_data, u32 a, u32 b, u32 c, u32 d, u32 e, u32 f, u32 g));
+STUB_IMPORT_IMPL(u32, w2c_wasi__snapshot__preview1_path_open,
+                 (w2c_wasi__snapshot__preview1* wasi_data, u32 a, u32 b, u32 c, u32 d, u32 e, u64 f, u64 g, u32 h, u32 i));
+STUB_IMPORT_IMPL(u32, w2c_wasi__snapshot__preview1_path_readlink,
+                 (w2c_wasi__snapshot__preview1* wasi_data, u32 a, u32 b, u32 c, u32 d, u32 e, u32 f));
+STUB_IMPORT_IMPL(u32, w2c_wasi__snapshot__preview1_path_remove_directory,
+                 (w2c_wasi__snapshot__preview1* wasi_data, u32 a, u32 b, u32 c));
+STUB_IMPORT_IMPL(u32, w2c_wasi__snapshot__preview1_path_rename,
+                 (w2c_wasi__snapshot__preview1* wasi_data, u32 a, u32 b, u32 c, u32 d, u32 e, u32 f));
+STUB_IMPORT_IMPL(u32, w2c_wasi__snapshot__preview1_path_symlink,
+                 (w2c_wasi__snapshot__preview1* wasi_data, u32 a, u32 b, u32 c, u32 d, u32 e));
+STUB_IMPORT_IMPL(u32, w2c_wasi__snapshot__preview1_path_unlink_file,
+                 (w2c_wasi__snapshot__preview1* wasi_data, u32 a, u32 b, u32 c));
+STUB_IMPORT_IMPL(u32, w2c_wasi__snapshot__preview1_poll_oneoff,
+                 (w2c_wasi__snapshot__preview1* wasi_data, u32 a, u32 b, u32 c, u32 d));
+STUB_IMPORT_IMPL(u32, w2c_wasi__snapshot__preview1_proc_raise,
+                 (w2c_wasi__snapshot__preview1* wasi_data, u32 a));
+STUB_IMPORT_IMPL(u32, w2c_wasi__snapshot__preview1_random_get,
+                 (w2c_wasi__snapshot__preview1* wasi_data, u32 a, u32 b));
+STUB_IMPORT_IMPL(u32, w2c_wasi__snapshot__preview1_sched_yield,
+                 (w2c_wasi__snapshot__preview1* wasi_data));
+STUB_IMPORT_IMPL(u32, w2c_wasi__snapshot__preview1_sock_accept,
+                 (w2c_wasi__snapshot__preview1* wasi_data, u32 a, u32 b, u32 c));
+STUB_IMPORT_IMPL(u32, w2c_wasi__snapshot__preview1_sock_recv,
+                 (w2c_wasi__snapshot__preview1* wasi_data, u32 a, u32 b, u32 c, u32 d, u32 e, u32 f));
+STUB_IMPORT_IMPL(u32, w2c_wasi__snapshot__preview1_sock_send,
+                 (w2c_wasi__snapshot__preview1* wasi_data, u32 a, u32 b, u32 c, u32 d, u32 e));
+STUB_IMPORT_IMPL(u32, w2c_wasi__snapshot__preview1_sock_shutdown,
+                 (w2c_wasi__snapshot__preview1* wasi_data, u32 a, u32 b));
+
+// clang-format on
+
+/////////////////////////////////////////////////////////////
+////////// Misc
+/////////////////////////////////////////////////////////////
+
+bool minwasi_init()
+{
+  return os_clock_init();
+}
+
+bool minwasi_init_instance(w2c_wasi__snapshot__preview1* wasi_data)
+{
+  return os_clock_init_instance(&(wasi_data->clock_data));
+}
+
+void minwasi_cleanup_instance(w2c_wasi__snapshot__preview1* wasi_data)
+{
+  os_clock_cleanup_instance(&(wasi_data->clock_data));
+}