Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream

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

4 files changed, 1088 insertions, 0 deletions

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..ed6975e27e
--- /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(_MSC_VER)
+__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