Adding upstream version 124.0.1.upstream/124.0.1

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

2 files changed, 1253 insertions, 0 deletions

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));
+}