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orca/ext/wasm3/source/m3_api_wasi.c

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orca runtime initial commit
2023-04-12 14:21:03 +00:00
//
// m3_api_wasi.c
//
// Created by Volodymyr Shymanskyy on 11/20/19.
// Copyright © 2019 Volodymyr Shymanskyy. All rights reserved.
//
#define _POSIX_C_SOURCE 200809L
#include "m3_api_wasi.h"
#include "m3_env.h"
#include "m3_exception.h"
#if defined(d_m3HasWASI)
// Fixup wasi_core.h
#if defined (M3_COMPILER_MSVC)
# define _Static_assert(...)
# define __attribute__(...)
# define _Noreturn
#endif
#include "extra/wasi_core.h"
#include <sys/types.h>
#include <sys/stat.h>
#include <time.h>
#include <errno.h>
#include <stdio.h>
#include <fcntl.h>
#if defined(APE)
// Actually Portable Executable
// All functions are already included in cosmopolitan.h
#elif defined(__wasi__) || defined(__APPLE__) || defined(__ANDROID_API__) || defined(__OpenBSD__) || defined(__linux__) || defined(__EMSCRIPTEN__) || defined(__CYGWIN__)
# include <unistd.h>
# include <sys/uio.h>
# if defined(__APPLE__)
# include <TargetConditionals.h>
# if TARGET_OS_OSX // TARGET_OS_MAC includes iOS
# include <sys/random.h>
# else // iOS / Simulator
# include <Security/Security.h>
# endif
# else
# include <sys/random.h>
# endif
# define HAS_IOVEC
#elif defined(_WIN32)
# include <Windows.h>
# include <io.h>
// See http://msdn.microsoft.com/en-us/library/windows/desktop/aa387694.aspx
# define SystemFunction036 NTAPI SystemFunction036
# include <NTSecAPI.h>
# undef SystemFunction036
# define ssize_t SSIZE_T
# define open _open
# define read _read
# define write _write
# define close _close
#endif
static m3_wasi_context_t* wasi_context;
typedef struct wasi_iovec_t
{
__wasi_size_t buf;
__wasi_size_t buf_len;
} wasi_iovec_t;
#define PREOPEN_CNT 5
typedef struct Preopen {
int fd;
const char* path;
const char* real_path;
} Preopen;
Preopen preopen[PREOPEN_CNT] = {
{ 0, "<stdin>" , "" },
{ 1, "<stdout>", "" },
{ 2, "<stderr>", "" },
{ -1, "/" , "." },
{ -1, "./" , "." },
};
#if defined(APE)
# define APE_SWITCH_BEG
# define APE_SWITCH_END {}
# define APE_CASE_RET(e1,e2) if (errnum == e1) return e2; else
#else
# define APE_SWITCH_BEG switch (errnum) {
# define APE_SWITCH_END }
# define APE_CASE_RET(e1,e2) case e1: return e2; break;
#endif
static
__wasi_errno_t errno_to_wasi(int errnum) {
APE_SWITCH_BEG
APE_CASE_RET( EPERM , __WASI_ERRNO_PERM )
APE_CASE_RET( ENOENT , __WASI_ERRNO_NOENT )
APE_CASE_RET( ESRCH , __WASI_ERRNO_SRCH )
APE_CASE_RET( EINTR , __WASI_ERRNO_INTR )
APE_CASE_RET( EIO , __WASI_ERRNO_IO )
APE_CASE_RET( ENXIO , __WASI_ERRNO_NXIO )
APE_CASE_RET( E2BIG , __WASI_ERRNO_2BIG )
APE_CASE_RET( ENOEXEC , __WASI_ERRNO_NOEXEC )
APE_CASE_RET( EBADF , __WASI_ERRNO_BADF )
APE_CASE_RET( ECHILD , __WASI_ERRNO_CHILD )
APE_CASE_RET( EAGAIN , __WASI_ERRNO_AGAIN )
APE_CASE_RET( ENOMEM , __WASI_ERRNO_NOMEM )
APE_CASE_RET( EACCES , __WASI_ERRNO_ACCES )
APE_CASE_RET( EFAULT , __WASI_ERRNO_FAULT )
APE_CASE_RET( EBUSY , __WASI_ERRNO_BUSY )
APE_CASE_RET( EEXIST , __WASI_ERRNO_EXIST )
APE_CASE_RET( EXDEV , __WASI_ERRNO_XDEV )
APE_CASE_RET( ENODEV , __WASI_ERRNO_NODEV )
APE_CASE_RET( ENOTDIR , __WASI_ERRNO_NOTDIR )
APE_CASE_RET( EISDIR , __WASI_ERRNO_ISDIR )
APE_CASE_RET( EINVAL , __WASI_ERRNO_INVAL )
APE_CASE_RET( ENFILE , __WASI_ERRNO_NFILE )
APE_CASE_RET( EMFILE , __WASI_ERRNO_MFILE )
APE_CASE_RET( ENOTTY , __WASI_ERRNO_NOTTY )
APE_CASE_RET( ETXTBSY , __WASI_ERRNO_TXTBSY )
APE_CASE_RET( EFBIG , __WASI_ERRNO_FBIG )
APE_CASE_RET( ENOSPC , __WASI_ERRNO_NOSPC )
APE_CASE_RET( ESPIPE , __WASI_ERRNO_SPIPE )
APE_CASE_RET( EROFS , __WASI_ERRNO_ROFS )
APE_CASE_RET( EMLINK , __WASI_ERRNO_MLINK )
APE_CASE_RET( EPIPE , __WASI_ERRNO_PIPE )
APE_CASE_RET( EDOM , __WASI_ERRNO_DOM )
APE_CASE_RET( ERANGE , __WASI_ERRNO_RANGE )
APE_SWITCH_END
return __WASI_ERRNO_INVAL;
}
#if defined(_WIN32)
#if !defined(__MINGW32__)
static inline
int clock_gettime(int clk_id, struct timespec *spec)
{
__int64 wintime; GetSystemTimeAsFileTime((FILETIME*)&wintime);
wintime -= 116444736000000000i64; //1jan1601 to 1jan1970
spec->tv_sec = wintime / 10000000i64; //seconds
spec->tv_nsec = wintime % 10000000i64 *100; //nano-seconds
return 0;
}
static inline
int clock_getres(int clk_id, struct timespec *spec) {
return -1; // Defaults to 1000000
}
#endif
static inline
int convert_clockid(__wasi_clockid_t in) {
return 0;
}
#else // _WIN32
static inline
int convert_clockid(__wasi_clockid_t in) {
switch (in) {
case __WASI_CLOCKID_MONOTONIC: return CLOCK_MONOTONIC;
case __WASI_CLOCKID_PROCESS_CPUTIME_ID: return CLOCK_PROCESS_CPUTIME_ID;
case __WASI_CLOCKID_REALTIME: return CLOCK_REALTIME;
case __WASI_CLOCKID_THREAD_CPUTIME_ID: return CLOCK_THREAD_CPUTIME_ID;
default: return -1;
}
}
#endif // _WIN32
static inline
__wasi_timestamp_t convert_timespec(const struct timespec *ts) {
if (ts->tv_sec < 0)
return 0;
if ((__wasi_timestamp_t)ts->tv_sec >= UINT64_MAX / 1000000000)
return UINT64_MAX;
return (__wasi_timestamp_t)ts->tv_sec * 1000000000 + ts->tv_nsec;
}
#if defined(HAS_IOVEC)
static inline
const void* copy_iov_to_host(IM3Runtime runtime, void* _mem, struct iovec* host_iov, wasi_iovec_t* wasi_iov, int32_t iovs_len)
{
// Convert wasi memory offsets to host addresses
for (int i = 0; i < iovs_len; i++) {
host_iov[i].iov_base = m3ApiOffsetToPtr(m3ApiReadMem32(&wasi_iov[i].buf));
host_iov[i].iov_len = m3ApiReadMem32(&wasi_iov[i].buf_len);
m3ApiCheckMem(host_iov[i].iov_base, host_iov[i].iov_len);
}
m3ApiSuccess();
}
#endif
/*
* WASI API implementation
*/
m3ApiRawFunction(m3_wasi_generic_args_get)
{
m3ApiReturnType (uint32_t)
m3ApiGetArgMem (uint32_t * , argv)
m3ApiGetArgMem (char * , argv_buf)
m3_wasi_context_t* context = (m3_wasi_context_t*)(_ctx->userdata);
if (context == NULL) { m3ApiReturn(__WASI_ERRNO_INVAL); }
m3ApiCheckMem(argv, context->argc * sizeof(uint32_t));
for (u32 i = 0; i < context->argc; ++i)
{
m3ApiWriteMem32(&argv[i], m3ApiPtrToOffset(argv_buf));
size_t len = strlen (context->argv[i]);
m3ApiCheckMem(argv_buf, len);
memcpy (argv_buf, context->argv[i], len);
argv_buf += len;
* argv_buf++ = 0;
}
m3ApiReturn(__WASI_ERRNO_SUCCESS);
}
m3ApiRawFunction(m3_wasi_generic_args_sizes_get)
{
m3ApiReturnType (uint32_t)
m3ApiGetArgMem (__wasi_size_t * , argc)
m3ApiGetArgMem (__wasi_size_t * , argv_buf_size)
m3ApiCheckMem(argc, sizeof(__wasi_size_t));
m3ApiCheckMem(argv_buf_size, sizeof(__wasi_size_t));
m3_wasi_context_t* context = (m3_wasi_context_t*)(_ctx->userdata);
if (context == NULL) { m3ApiReturn(__WASI_ERRNO_INVAL); }
__wasi_size_t buf_len = 0;
for (u32 i = 0; i < context->argc; ++i)
{
buf_len += strlen (context->argv[i]) + 1;
}
m3ApiWriteMem32(argc, context->argc);
m3ApiWriteMem32(argv_buf_size, buf_len);
m3ApiReturn(__WASI_ERRNO_SUCCESS);
}
m3ApiRawFunction(m3_wasi_generic_environ_get)
{
m3ApiReturnType (uint32_t)
m3ApiGetArgMem (uint32_t * , env)
m3ApiGetArgMem (char * , env_buf)
// TODO
m3ApiReturn(__WASI_ERRNO_SUCCESS);
}
m3ApiRawFunction(m3_wasi_generic_environ_sizes_get)
{
m3ApiReturnType (uint32_t)
m3ApiGetArgMem (__wasi_size_t * , env_count)
m3ApiGetArgMem (__wasi_size_t * , env_buf_size)
m3ApiCheckMem(env_count, sizeof(__wasi_size_t));
m3ApiCheckMem(env_buf_size, sizeof(__wasi_size_t));
// TODO
m3ApiWriteMem32(env_count, 0);
m3ApiWriteMem32(env_buf_size, 0);
m3ApiReturn(__WASI_ERRNO_SUCCESS);
}
m3ApiRawFunction(m3_wasi_generic_fd_prestat_dir_name)
{
m3ApiReturnType (uint32_t)
m3ApiGetArg (__wasi_fd_t , fd)
m3ApiGetArgMem (char * , path)
m3ApiGetArg (__wasi_size_t , path_len)
m3ApiCheckMem(path, path_len);
if (fd < 3 || fd >= PREOPEN_CNT) { m3ApiReturn(__WASI_ERRNO_BADF); }
size_t slen = strlen(preopen[fd].path) + 1;
memcpy(path, preopen[fd].path, M3_MIN(slen, path_len));
m3ApiReturn(__WASI_ERRNO_SUCCESS);
}
m3ApiRawFunction(m3_wasi_generic_fd_prestat_get)
{
m3ApiReturnType (uint32_t)
m3ApiGetArg (__wasi_fd_t , fd)
m3ApiGetArgMem (uint8_t * , buf)
m3ApiCheckMem(buf, 8);
if (fd < 3 || fd >= PREOPEN_CNT) { m3ApiReturn(__WASI_ERRNO_BADF); }
m3ApiWriteMem32(buf+0, __WASI_PREOPENTYPE_DIR);
m3ApiWriteMem32(buf+4, strlen(preopen[fd].path) + 1);
m3ApiReturn(__WASI_ERRNO_SUCCESS);
}
m3ApiRawFunction(m3_wasi_generic_fd_fdstat_get)
{
m3ApiReturnType (uint32_t)
m3ApiGetArg (__wasi_fd_t , fd)
m3ApiGetArgMem (__wasi_fdstat_t * , fdstat)
m3ApiCheckMem(fdstat, sizeof(__wasi_fdstat_t));
#ifdef _WIN32
// TODO: This needs a proper implementation
if (fd < PREOPEN_CNT) {
fdstat->fs_filetype= __WASI_FILETYPE_DIRECTORY;
} else {
fdstat->fs_filetype= __WASI_FILETYPE_REGULAR_FILE;
}
fdstat->fs_flags = 0;
fdstat->fs_rights_base = (uint64_t)-1; // all rights
fdstat->fs_rights_inheriting = (uint64_t)-1; // all rights
m3ApiReturn(__WASI_ERRNO_SUCCESS);
#else
struct stat fd_stat;
#if !defined(APE) // TODO: not implemented in Cosmopolitan
int fl = fcntl(fd, F_GETFL);
if (fl < 0) { m3ApiReturn(errno_to_wasi(errno)); }
#endif
fstat(fd, &fd_stat);
int mode = fd_stat.st_mode;
fdstat->fs_filetype = (S_ISBLK(mode) ? __WASI_FILETYPE_BLOCK_DEVICE : 0) |
(S_ISCHR(mode) ? __WASI_FILETYPE_CHARACTER_DEVICE : 0) |
(S_ISDIR(mode) ? __WASI_FILETYPE_DIRECTORY : 0) |
(S_ISREG(mode) ? __WASI_FILETYPE_REGULAR_FILE : 0) |
//(S_ISSOCK(mode) ? __WASI_FILETYPE_SOCKET_STREAM : 0) |
(S_ISLNK(mode) ? __WASI_FILETYPE_SYMBOLIC_LINK : 0);
#if !defined(APE)
m3ApiWriteMem16(&fdstat->fs_flags,
((fl & O_APPEND) ? __WASI_FDFLAGS_APPEND : 0) |
((fl & O_DSYNC) ? __WASI_FDFLAGS_DSYNC : 0) |
((fl & O_NONBLOCK) ? __WASI_FDFLAGS_NONBLOCK : 0) |
//((fl & O_RSYNC) ? __WASI_FDFLAGS_RSYNC : 0) |
((fl & O_SYNC) ? __WASI_FDFLAGS_SYNC : 0));
#endif // APE
fdstat->fs_rights_base = (uint64_t)-1; // all rights
// Make descriptors 0,1,2 look like a TTY
if (fd <= 2) {
fdstat->fs_rights_base &= ~(__WASI_RIGHTS_FD_SEEK | __WASI_RIGHTS_FD_TELL);
}
fdstat->fs_rights_inheriting = (uint64_t)-1; // all rights
m3ApiReturn(__WASI_ERRNO_SUCCESS);
#endif
}
m3ApiRawFunction(m3_wasi_generic_fd_fdstat_set_flags)
{
m3ApiReturnType (uint32_t)
m3ApiGetArg (__wasi_fd_t , fd)
m3ApiGetArg (__wasi_fdflags_t , flags)
// TODO
m3ApiReturn(__WASI_ERRNO_SUCCESS);
}
m3ApiRawFunction(m3_wasi_unstable_fd_seek)
{
m3ApiReturnType (uint32_t)
m3ApiGetArg (__wasi_fd_t , fd)
m3ApiGetArg (__wasi_filedelta_t , offset)
m3ApiGetArg (uint32_t , wasi_whence)
m3ApiGetArgMem (__wasi_filesize_t * , result)
m3ApiCheckMem(result, sizeof(__wasi_filesize_t));
int whence;
switch (wasi_whence) {
case 0: whence = SEEK_CUR; break;
case 1: whence = SEEK_END; break;
case 2: whence = SEEK_SET; break;
default: m3ApiReturn(__WASI_ERRNO_INVAL);
}
int64_t ret;
#if defined(M3_COMPILER_MSVC) || defined(__MINGW32__)
ret = _lseeki64(fd, offset, whence);
#else
ret = lseek(fd, offset, whence);
#endif
if (ret < 0) { m3ApiReturn(errno_to_wasi(errno)); }
m3ApiWriteMem64(result, ret);
m3ApiReturn(__WASI_ERRNO_SUCCESS);
}
m3ApiRawFunction(m3_wasi_snapshot_preview1_fd_seek)
{
m3ApiReturnType (uint32_t)
m3ApiGetArg (__wasi_fd_t , fd)
m3ApiGetArg (__wasi_filedelta_t , offset)
m3ApiGetArg (uint32_t , wasi_whence)
m3ApiGetArgMem (__wasi_filesize_t * , result)
m3ApiCheckMem(result, sizeof(__wasi_filesize_t));
int whence;
switch (wasi_whence) {
case 0: whence = SEEK_SET; break;
case 1: whence = SEEK_CUR; break;
case 2: whence = SEEK_END; break;
default: m3ApiReturn(__WASI_ERRNO_INVAL);
}
int64_t ret;
#if defined(M3_COMPILER_MSVC) || defined(__MINGW32__)
ret = _lseeki64(fd, offset, whence);
#else
ret = lseek(fd, offset, whence);
#endif
if (ret < 0) { m3ApiReturn(errno_to_wasi(errno)); }
m3ApiWriteMem64(result, ret);
m3ApiReturn(__WASI_ERRNO_SUCCESS);
}
m3ApiRawFunction(m3_wasi_generic_path_open)
{
m3ApiReturnType (uint32_t)
m3ApiGetArg (__wasi_fd_t , dirfd)
m3ApiGetArg (__wasi_lookupflags_t , dirflags)
m3ApiGetArgMem (const char * , path)
m3ApiGetArg (__wasi_size_t , path_len)
m3ApiGetArg (__wasi_oflags_t , oflags)
m3ApiGetArg (__wasi_rights_t , fs_rights_base)
m3ApiGetArg (__wasi_rights_t , fs_rights_inheriting)
m3ApiGetArg (__wasi_fdflags_t , fs_flags)
m3ApiGetArgMem (__wasi_fd_t * , fd)
m3ApiCheckMem(path, path_len);
m3ApiCheckMem(fd, sizeof(__wasi_fd_t));
if (path_len >= 512)
m3ApiReturn(__WASI_ERRNO_INVAL);
// copy path so we can ensure it is NULL terminated
#if defined(M3_COMPILER_MSVC)
char host_path[512];
#else
char host_path[path_len+1];
#endif
memcpy (host_path, path, path_len);
host_path[path_len] = '\0'; // NULL terminator
#if defined(APE)
// TODO: This all needs a proper implementation
int flags = ((oflags & __WASI_OFLAGS_CREAT) ? O_CREAT : 0) |
((oflags & __WASI_OFLAGS_EXCL) ? O_EXCL : 0) |
((oflags & __WASI_OFLAGS_TRUNC) ? O_TRUNC : 0) |
((fs_flags & __WASI_FDFLAGS_APPEND) ? O_APPEND : 0);
if ((fs_rights_base & __WASI_RIGHTS_FD_READ) &&
(fs_rights_base & __WASI_RIGHTS_FD_WRITE)) {
flags |= O_RDWR;
} else if ((fs_rights_base & __WASI_RIGHTS_FD_WRITE)) {
flags |= O_WRONLY;
} else if ((fs_rights_base & __WASI_RIGHTS_FD_READ)) {
flags |= O_RDONLY; // no-op because O_RDONLY is 0
}
int mode = 0644;
int host_fd = open (host_path, flags, mode);
if (host_fd < 0)
{
m3ApiReturn(errno_to_wasi (errno));
}
else
{
m3ApiWriteMem32(fd, host_fd);
m3ApiReturn(__WASI_ERRNO_SUCCESS);
}
#elif defined(_WIN32)
// TODO: This all needs a proper implementation
int flags = ((oflags & __WASI_OFLAGS_CREAT) ? _O_CREAT : 0) |
((oflags & __WASI_OFLAGS_EXCL) ? _O_EXCL : 0) |
((oflags & __WASI_OFLAGS_TRUNC) ? _O_TRUNC : 0) |
((fs_flags & __WASI_FDFLAGS_APPEND) ? _O_APPEND : 0) |
_O_BINARY;
if ((fs_rights_base & __WASI_RIGHTS_FD_READ) &&
(fs_rights_base & __WASI_RIGHTS_FD_WRITE)) {
flags |= _O_RDWR;
} else if ((fs_rights_base & __WASI_RIGHTS_FD_WRITE)) {
flags |= _O_WRONLY;
} else if ((fs_rights_base & __WASI_RIGHTS_FD_READ)) {
flags |= _O_RDONLY; // no-op because O_RDONLY is 0
}
int mode = 0644;
int host_fd = open (host_path, flags, mode);
if (host_fd < 0)
{
m3ApiReturn(errno_to_wasi (errno));
}
else
{
m3ApiWriteMem32(fd, host_fd);
m3ApiReturn(__WASI_ERRNO_SUCCESS);
}
#else
// translate o_flags and fs_flags into flags and mode
int flags = ((oflags & __WASI_OFLAGS_CREAT) ? O_CREAT : 0) |
//((oflags & __WASI_OFLAGS_DIRECTORY) ? O_DIRECTORY : 0) |
((oflags & __WASI_OFLAGS_EXCL) ? O_EXCL : 0) |
((oflags & __WASI_OFLAGS_TRUNC) ? O_TRUNC : 0) |
((fs_flags & __WASI_FDFLAGS_APPEND) ? O_APPEND : 0) |
((fs_flags & __WASI_FDFLAGS_DSYNC) ? O_DSYNC : 0) |
((fs_flags & __WASI_FDFLAGS_NONBLOCK) ? O_NONBLOCK : 0) |
//((fs_flags & __WASI_FDFLAGS_RSYNC) ? O_RSYNC : 0) |
((fs_flags & __WASI_FDFLAGS_SYNC) ? O_SYNC : 0);
if ((fs_rights_base & __WASI_RIGHTS_FD_READ) &&
(fs_rights_base & __WASI_RIGHTS_FD_WRITE)) {
flags |= O_RDWR;
} else if ((fs_rights_base & __WASI_RIGHTS_FD_WRITE)) {
flags |= O_WRONLY;
} else if ((fs_rights_base & __WASI_RIGHTS_FD_READ)) {
flags |= O_RDONLY; // no-op because O_RDONLY is 0
}
int mode = 0644;
int host_fd = openat (preopen[dirfd].fd, host_path, flags, mode);
if (host_fd < 0)
{
m3ApiReturn(errno_to_wasi (errno));
}
else
{
m3ApiWriteMem32(fd, host_fd);
m3ApiReturn(__WASI_ERRNO_SUCCESS);
}
#endif
}
m3ApiRawFunction(m3_wasi_generic_fd_read)
{
m3ApiReturnType (uint32_t)
m3ApiGetArg (__wasi_fd_t , fd)
m3ApiGetArgMem (wasi_iovec_t * , wasi_iovs)
m3ApiGetArg (__wasi_size_t , iovs_len)
m3ApiGetArgMem (__wasi_size_t * , nread)
m3ApiCheckMem(wasi_iovs, iovs_len * sizeof(wasi_iovec_t));
m3ApiCheckMem(nread, sizeof(__wasi_size_t));
#if defined(HAS_IOVEC)
struct iovec iovs[iovs_len];
const void* mem_check = copy_iov_to_host(runtime, _mem, iovs, wasi_iovs, iovs_len);
if (mem_check != m3Err_none) {
return mem_check;
}
ssize_t ret = readv(fd, iovs, iovs_len);
if (ret < 0) { m3ApiReturn(errno_to_wasi(errno)); }
m3ApiWriteMem32(nread, ret);
m3ApiReturn(__WASI_ERRNO_SUCCESS);
#else
ssize_t res = 0;
for (__wasi_size_t i = 0; i < iovs_len; i++) {
void* addr = m3ApiOffsetToPtr(m3ApiReadMem32(&wasi_iovs[i].buf));
size_t len = m3ApiReadMem32(&wasi_iovs[i].buf_len);
if (len == 0) continue;
m3ApiCheckMem(addr, len);
int ret = read (fd, addr, len);
if (ret < 0) m3ApiReturn(errno_to_wasi(errno));
res += ret;
if ((size_t)ret < len) break;
}
m3ApiWriteMem32(nread, res);
m3ApiReturn(__WASI_ERRNO_SUCCESS);
#endif
}
m3ApiRawFunction(m3_wasi_generic_fd_write)
{
m3ApiReturnType (uint32_t)
m3ApiGetArg (__wasi_fd_t , fd)
m3ApiGetArgMem (wasi_iovec_t * , wasi_iovs)
m3ApiGetArg (__wasi_size_t , iovs_len)
m3ApiGetArgMem (__wasi_size_t * , nwritten)
m3ApiCheckMem(wasi_iovs, iovs_len * sizeof(wasi_iovec_t));
m3ApiCheckMem(nwritten, sizeof(__wasi_size_t));
#if defined(HAS_IOVEC)
struct iovec iovs[iovs_len];
const void* mem_check = copy_iov_to_host(runtime, _mem, iovs, wasi_iovs, iovs_len);
if (mem_check != m3Err_none) {
return mem_check;
}
ssize_t ret = writev(fd, iovs, iovs_len);
if (ret < 0) { m3ApiReturn(errno_to_wasi(errno)); }
m3ApiWriteMem32(nwritten, ret);
m3ApiReturn(__WASI_ERRNO_SUCCESS);
#else
ssize_t res = 0;
for (__wasi_size_t i = 0; i < iovs_len; i++) {
void* addr = m3ApiOffsetToPtr(m3ApiReadMem32(&wasi_iovs[i].buf));
size_t len = m3ApiReadMem32(&wasi_iovs[i].buf_len);
if (len == 0) continue;
m3ApiCheckMem(addr, len);
int ret = write (fd, addr, len);
if (ret < 0) m3ApiReturn(errno_to_wasi(errno));
res += ret;
if ((size_t)ret < len) break;
}
m3ApiWriteMem32(nwritten, res);
m3ApiReturn(__WASI_ERRNO_SUCCESS);
#endif
}
m3ApiRawFunction(m3_wasi_generic_fd_close)
{
m3ApiReturnType (uint32_t)
m3ApiGetArg (__wasi_fd_t, fd)
int ret = close(fd);
m3ApiReturn(ret == 0 ? __WASI_ERRNO_SUCCESS : ret);
}
m3ApiRawFunction(m3_wasi_generic_fd_datasync)
{
m3ApiReturnType (uint32_t)
m3ApiGetArg (__wasi_fd_t, fd)
#if defined(_WIN32)
int ret = _commit(fd);
#elif defined(__APPLE__)
int ret = fsync(fd);
#elif defined(__ANDROID_API__) || defined(__OpenBSD__) || defined(__linux__) || defined(__EMSCRIPTEN__)
int ret = fdatasync(fd);
#else
int ret = __WASI_ERRNO_NOSYS;
#endif
m3ApiReturn(ret == 0 ? __WASI_ERRNO_SUCCESS : ret);
}
m3ApiRawFunction(m3_wasi_generic_random_get)
{
m3ApiReturnType (uint32_t)
m3ApiGetArgMem (uint8_t * , buf)
m3ApiGetArg (__wasi_size_t , buf_len)
m3ApiCheckMem(buf, buf_len);
while (1) {
ssize_t retlen = 0;
#if defined(__wasi__) || defined(__APPLE__) || defined(__ANDROID_API__) || defined(__OpenBSD__) || defined(__EMSCRIPTEN__)
size_t reqlen = M3_MIN (buf_len, 256);
# if defined(__APPLE__) && (TARGET_OS_IPHONE || TARGET_IPHONE_SIMULATOR)
retlen = SecRandomCopyBytes(kSecRandomDefault, reqlen, buf) < 0 ? -1 : reqlen;
# else
retlen = getentropy(buf, reqlen) < 0 ? -1 : reqlen;
# endif
#elif defined(__FreeBSD__) || defined(__linux__)
retlen = getrandom(buf, buf_len, 0);
#elif defined(_WIN32)
if (RtlGenRandom(buf, buf_len) == TRUE) {
m3ApiReturn(__WASI_ERRNO_SUCCESS);
}
#else
m3ApiReturn(__WASI_ERRNO_NOSYS);
#endif
if (retlen < 0) {
if (errno == EINTR || errno == EAGAIN) {
continue;
}
m3ApiReturn(errno_to_wasi(errno));
} else if (retlen == buf_len) {
m3ApiReturn(__WASI_ERRNO_SUCCESS);
} else {
buf += retlen;
buf_len -= retlen;
}
}
}
m3ApiRawFunction(m3_wasi_generic_clock_res_get)
{
m3ApiReturnType (uint32_t)
m3ApiGetArg (__wasi_clockid_t , wasi_clk_id)
m3ApiGetArgMem (__wasi_timestamp_t * , resolution)
m3ApiCheckMem(resolution, sizeof(__wasi_timestamp_t));
int clk = convert_clockid(wasi_clk_id);
if (clk < 0) m3ApiReturn(__WASI_ERRNO_INVAL);
struct timespec tp;
if (clock_getres(clk, &tp) != 0) {
m3ApiWriteMem64(resolution, 1000000);
} else {
m3ApiWriteMem64(resolution, convert_timespec(&tp));
}
m3ApiReturn(__WASI_ERRNO_SUCCESS);
}
m3ApiRawFunction(m3_wasi_generic_clock_time_get)
{
m3ApiReturnType (uint32_t)
m3ApiGetArg (__wasi_clockid_t , wasi_clk_id)
m3ApiGetArg (__wasi_timestamp_t , precision)
m3ApiGetArgMem (__wasi_timestamp_t * , time)
m3ApiCheckMem(time, sizeof(__wasi_timestamp_t));
int clk = convert_clockid(wasi_clk_id);
if (clk < 0) m3ApiReturn(__WASI_ERRNO_INVAL);
struct timespec tp;
if (clock_gettime(clk, &tp) != 0) {
m3ApiReturn(errno_to_wasi(errno));
}
m3ApiWriteMem64(time, convert_timespec(&tp));
m3ApiReturn(__WASI_ERRNO_SUCCESS);
}
m3ApiRawFunction(m3_wasi_generic_proc_exit)
{
m3ApiGetArg (uint32_t, code)
m3_wasi_context_t* context = (m3_wasi_context_t*)(_ctx->userdata);
if (context) {
context->exit_code = code;
}
m3ApiTrap(m3Err_trapExit);
}
static
M3Result SuppressLookupFailure(M3Result i_result)
{
if (i_result == m3Err_functionLookupFailed)
return m3Err_none;
else
return i_result;
}
m3_wasi_context_t* m3_GetWasiContext()
{
return wasi_context;
}
M3Result m3_LinkWASI (IM3Module module)
{
M3Result result = m3Err_none;
#ifdef _WIN32
setmode(fileno(stdin), O_BINARY);
setmode(fileno(stdout), O_BINARY);
setmode(fileno(stderr), O_BINARY);
#else
// Preopen dirs
for (int i = 3; i < PREOPEN_CNT; i++) {
preopen[i].fd = open(preopen[i].real_path, O_RDONLY);
}
#endif
if (!wasi_context) {
wasi_context = (m3_wasi_context_t*)malloc(sizeof(m3_wasi_context_t));
wasi_context->exit_code = 0;
wasi_context->argc = 0;
wasi_context->argv = 0;
}
static const char* namespaces[2] = { "wasi_unstable", "wasi_snapshot_preview1" };
// Some functions are incompatible between WASI versions
_ (SuppressLookupFailure (m3_LinkRawFunction (module, "wasi_unstable", "fd_seek", "i(iIi*)", &m3_wasi_unstable_fd_seek)));
_ (SuppressLookupFailure (m3_LinkRawFunction (module, "wasi_snapshot_preview1", "fd_seek", "i(iIi*)", &m3_wasi_snapshot_preview1_fd_seek)));
//_ (SuppressLookupFailure (m3_LinkRawFunction (module, "wasi_unstable", "fd_filestat_get", "i(i*)", &m3_wasi_unstable_fd_filestat_get)));
//_ (SuppressLookupFailure (m3_LinkRawFunction (module, "wasi_snapshot_preview1", "fd_filestat_get", "i(i*)", &m3_wasi_snapshot_preview1_fd_filestat_get)));
//_ (SuppressLookupFailure (m3_LinkRawFunction (module, "wasi_unstable", "path_filestat_get", "i(ii*i*)", &m3_wasi_unstable_path_filestat_get)));
//_ (SuppressLookupFailure (m3_LinkRawFunction (module, "wasi_snapshot_preview1", "path_filestat_get", "i(ii*i*)", &m3_wasi_snapshot_preview1_path_filestat_get)));
for (int i=0; i<2; i++)
{
const char* wasi = namespaces[i];
_ (SuppressLookupFailure (m3_LinkRawFunctionEx (module, wasi, "args_get", "i(**)", &m3_wasi_generic_args_get, wasi_context)));
_ (SuppressLookupFailure (m3_LinkRawFunctionEx (module, wasi, "args_sizes_get", "i(**)", &m3_wasi_generic_args_sizes_get, wasi_context)));
_ (SuppressLookupFailure (m3_LinkRawFunction (module, wasi, "clock_res_get", "i(i*)", &m3_wasi_generic_clock_res_get)));
_ (SuppressLookupFailure (m3_LinkRawFunction (module, wasi, "clock_time_get", "i(iI*)", &m3_wasi_generic_clock_time_get)));
_ (SuppressLookupFailure (m3_LinkRawFunction (module, wasi, "environ_get", "i(**)", &m3_wasi_generic_environ_get)));
_ (SuppressLookupFailure (m3_LinkRawFunction (module, wasi, "environ_sizes_get", "i(**)", &m3_wasi_generic_environ_sizes_get)));
//_ (SuppressLookupFailure (m3_LinkRawFunction (module, wasi, "fd_advise", "i(iIIi)", )));
//_ (SuppressLookupFailure (m3_LinkRawFunction (module, wasi, "fd_allocate", "i(iII)", )));
_ (SuppressLookupFailure (m3_LinkRawFunction (module, wasi, "fd_close", "i(i)", &m3_wasi_generic_fd_close)));
_ (SuppressLookupFailure (m3_LinkRawFunction (module, wasi, "fd_datasync", "i(i)", &m3_wasi_generic_fd_datasync)));
_ (SuppressLookupFailure (m3_LinkRawFunction (module, wasi, "fd_fdstat_get", "i(i*)", &m3_wasi_generic_fd_fdstat_get)));
_ (SuppressLookupFailure (m3_LinkRawFunction (module, wasi, "fd_fdstat_set_flags", "i(ii)", &m3_wasi_generic_fd_fdstat_set_flags)));
//_ (SuppressLookupFailure (m3_LinkRawFunction (module, wasi, "fd_fdstat_set_rights", "i(iII)", )));
//_ (SuppressLookupFailure (m3_LinkRawFunction (module, wasi, "fd_filestat_set_size", "i(iI)", )));
//_ (SuppressLookupFailure (m3_LinkRawFunction (module, wasi, "fd_filestat_set_times","i(iIIi)", )));
//_ (SuppressLookupFailure (m3_LinkRawFunction (module, wasi, "fd_pread", "i(i*iI*)",)));
_ (SuppressLookupFailure (m3_LinkRawFunction (module, wasi, "fd_prestat_get", "i(i*)", &m3_wasi_generic_fd_prestat_get)));
_ (SuppressLookupFailure (m3_LinkRawFunction (module, wasi, "fd_prestat_dir_name", "i(i*i)", &m3_wasi_generic_fd_prestat_dir_name)));
//_ (SuppressLookupFailure (m3_LinkRawFunction (module, wasi, "fd_pwrite", "i(i*iI*)",)));
_ (SuppressLookupFailure (m3_LinkRawFunction (module, wasi, "fd_read", "i(i*i*)", &m3_wasi_generic_fd_read)));
//_ (SuppressLookupFailure (m3_LinkRawFunction (module, wasi, "fd_readdir", "i(i*iI*)",)));
//_ (SuppressLookupFailure (m3_LinkRawFunction (module, wasi, "fd_renumber", "i(ii)", )));
//_ (SuppressLookupFailure (m3_LinkRawFunction (module, wasi, "fd_sync", "i(i)", )));
//_ (SuppressLookupFailure (m3_LinkRawFunction (module, wasi, "fd_tell", "i(i*)", )));
_ (SuppressLookupFailure (m3_LinkRawFunction (module, wasi, "fd_write", "i(i*i*)", &m3_wasi_generic_fd_write)));
//_ (SuppressLookupFailure (m3_LinkRawFunction (module, wasi, "path_create_directory", "i(i*i)", )));
//_ (SuppressLookupFailure (m3_LinkRawFunction (module, wasi, "path_filestat_set_times", "i(ii*iIIi)", )));
//_ (SuppressLookupFailure (m3_LinkRawFunction (module, wasi, "path_link", "i(ii*ii*i)", )));
_ (SuppressLookupFailure (m3_LinkRawFunction (module, wasi, "path_open", "i(ii*iiIIi*)", &m3_wasi_generic_path_open)));
//_ (SuppressLookupFailure (m3_LinkRawFunction (module, wasi, "path_readlink", "i(i*i*i*)", )));
//_ (SuppressLookupFailure (m3_LinkRawFunction (module, wasi, "path_remove_directory", "i(i*i)", )));
//_ (SuppressLookupFailure (m3_LinkRawFunction (module, wasi, "path_rename", "i(i*ii*i)", )));
//_ (SuppressLookupFailure (m3_LinkRawFunction (module, wasi, "path_symlink", "i(*ii*i)", )));
//_ (SuppressLookupFailure (m3_LinkRawFunction (module, wasi, "path_unlink_file", "i(i*i)", )));
//_ (SuppressLookupFailure (m3_LinkRawFunction (module, wasi, "poll_oneoff", "i(**i*)", &m3_wasi_generic_poll_oneoff)));
_ (SuppressLookupFailure (m3_LinkRawFunctionEx (module, wasi, "proc_exit", "v(i)", &m3_wasi_generic_proc_exit, wasi_context)));
//_ (SuppressLookupFailure (m3_LinkRawFunction (module, wasi, "proc_raise", "i(i)", )));
_ (SuppressLookupFailure (m3_LinkRawFunction (module, wasi, "random_get", "i(*i)", &m3_wasi_generic_random_get)));
//_ (SuppressLookupFailure (m3_LinkRawFunction (module, wasi, "sched_yield", "i()", )));
//_ (SuppressLookupFailure (m3_LinkRawFunction (module, wasi, "sock_recv", "i(i*ii**)", )));
//_ (SuppressLookupFailure (m3_LinkRawFunction (module, wasi, "sock_send", "i(i*ii*)", )));
//_ (SuppressLookupFailure (m3_LinkRawFunction (module, wasi, "sock_shutdown", "i(ii)", )));
}
_catch:
return result;
}
#endif // d_m3HasWASI