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m3_api_uvwasi.c
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//
// m3_api_uvwasi.c
//
// Created by Colin J. Ihrig on 4/20/20.
// Copyright © 2020 Colin J. Ihrig, Volodymyr Shymanskyy. All rights reserved.
//
#define _POSIX_C_SOURCE 200809L
#include "m3_api_wasi.h"
#include "m3_api_defs.h"
#include "m3_env.h"
#include "m3_exception.h"
#if defined(d_m3HasUVWASI)
#include <stdio.h>
#include <string.h>
#include "uvwasi.h"
#ifdef __APPLE__
# include <crt_externs.h>
# define environ (*_NSGetEnviron())
#elif !defined(_MSC_VER)
extern char** environ;
#endif
uvwasi_t uvwasi;
typedef struct wasi_iovec_t
{
uvwasi_size_t buf;
uvwasi_size_t buf_len;
} wasi_iovec_t;
/*
* WASI API implementation
*/
m3ApiRawFunction(m3_wasi_unstable_args_get)
{
m3ApiReturnType (uint32_t)
m3ApiGetArgMem (uint32_t * , argv)
m3ApiGetArgMem (char * , argv_buf)
if (runtime == NULL) { m3ApiReturn(UVWASI_EINVAL); }
for (u32 i = 0; i < runtime->argc; ++i)
{
m3ApiWriteMem32(&argv[i], m3ApiPtrToOffset(argv_buf));
size_t len = strlen (runtime->argv[i]);
memcpy (argv_buf, runtime->argv[i], len);
argv_buf += len;
* argv_buf++ = 0;
}
m3ApiReturn(UVWASI_ESUCCESS);
}
m3ApiRawFunction(m3_wasi_unstable_args_sizes_get)
{
m3ApiReturnType (uint32_t)
m3ApiGetArgMem (uvwasi_size_t * , argc)
m3ApiGetArgMem (uvwasi_size_t * , argv_buf_size)
if (runtime == NULL) { m3ApiReturn(UVWASI_EINVAL); }
uvwasi_size_t buflen = 0;
for (u32 i = 0; i < runtime->argc; ++i)
{
buflen += strlen (runtime->argv[i]) + 1;
}
m3ApiWriteMem32(argc, runtime->argc);
m3ApiWriteMem32(argv_buf_size, buflen);
m3ApiReturn(UVWASI_ESUCCESS);
}
m3ApiRawFunction(m3_wasi_unstable_environ_get)
{
m3ApiReturnType (uint32_t)
m3ApiGetArgMem (uint32_t * , env)
m3ApiGetArgMem (char * , env_buf)
char **environment;
uvwasi_errno_t ret;
environment = calloc(uvwasi.envc, sizeof(char *));
if (environment == NULL) {
m3ApiReturn(UVWASI_ENOMEM);
}
ret = uvwasi_environ_get(&uvwasi, environment, env_buf);
if (ret != UVWASI_ESUCCESS) {
free(environment);
m3ApiReturn(ret);
}
uint32_t environ_buf_offset = m3ApiPtrToOffset(env_buf);
for (u32 i = 0; i < uvwasi.envc; ++i)
{
uint32_t offset = environ_buf_offset +
(environment[i] - environment[0]);
env[i] = offset;
}
free(environment);
m3ApiReturn(UVWASI_ESUCCESS);
}
m3ApiRawFunction(m3_wasi_unstable_environ_sizes_get)
{
m3ApiReturnType (uint32_t)
m3ApiGetArgMem (uvwasi_size_t * , env_count)
m3ApiGetArgMem (uvwasi_size_t * , env_buf_size)
uvwasi_size_t count;
uvwasi_size_t buf_size;
uvwasi_errno_t ret = uvwasi_environ_sizes_get(&uvwasi, &count, &buf_size);
m3ApiWriteMem32(env_count, count);
m3ApiWriteMem32(env_buf_size, buf_size);
m3ApiReturn(ret);
}
m3ApiRawFunction(m3_wasi_unstable_fd_prestat_dir_name)
{
m3ApiReturnType (uint32_t)
m3ApiGetArg (uvwasi_fd_t , fd)
m3ApiGetArgMem (char * , path)
m3ApiGetArg (uvwasi_size_t , path_len)
uvwasi_errno_t ret = uvwasi_fd_prestat_dir_name(&uvwasi, fd, path, path_len);
m3ApiReturn(ret);
}
m3ApiRawFunction(m3_wasi_unstable_fd_prestat_get)
{
m3ApiReturnType (uint32_t)
m3ApiGetArg (uvwasi_fd_t , fd)
m3ApiGetArgMem (uint32_t * , buf)
uvwasi_prestat_t prestat;
uvwasi_errno_t ret;
ret = uvwasi_fd_prestat_get(&uvwasi, fd, &prestat);
if (ret != UVWASI_ESUCCESS) {
m3ApiReturn(ret);
}
m3ApiWriteMem32(buf, prestat.pr_type);
m3ApiWriteMem32(buf+1, prestat.u.dir.pr_name_len);
m3ApiReturn(UVWASI_ESUCCESS);
}
m3ApiRawFunction(m3_wasi_unstable_fd_fdstat_get)
{
m3ApiReturnType (uint32_t)
m3ApiGetArg (uvwasi_fd_t , fd)
m3ApiGetArgMem (uint8_t * , fdstat)
uvwasi_fdstat_t stat;
uvwasi_errno_t ret = uvwasi_fd_fdstat_get(&uvwasi, fd, &stat);
if (ret != UVWASI_ESUCCESS) {
m3ApiReturn(ret);
}
m3ApiWriteMem16(fdstat, stat.fs_filetype);
m3ApiWriteMem16(fdstat+2, stat.fs_flags);
m3ApiWriteMem64(fdstat+8, stat.fs_rights_base);
m3ApiWriteMem64(fdstat+16, stat.fs_rights_inheriting);
m3ApiReturn(UVWASI_ESUCCESS);
}
m3ApiRawFunction(m3_wasi_unstable_fd_fdstat_set_flags)
{
m3ApiReturnType (uint32_t)
m3ApiGetArg (uvwasi_fd_t , fd)
m3ApiGetArg (uvwasi_fdflags_t , flags)
uvwasi_errno_t ret = uvwasi_fd_fdstat_set_flags(&uvwasi, fd, flags);
m3ApiReturn(ret);
}
// TODO: Remove this at some point
m3ApiRawFunction(m3_wasi_unstable_fd_seek)
{
m3ApiReturnType (uint32_t)
m3ApiGetArg (uvwasi_fd_t , fd)
m3ApiGetArg (uvwasi_filedelta_t , offset)
m3ApiGetArg (uint32_t , wasi_whence)
m3ApiGetArgMem (uvwasi_filesize_t * , result)
uvwasi_whence_t whence = wasi_whence;
switch (wasi_whence) {
case 0: whence = UVWASI_WHENCE_CUR; break;
case 1: whence = UVWASI_WHENCE_END; break;
case 2: whence = UVWASI_WHENCE_SET; break;
default: m3ApiReturn(UVWASI_EINVAL);
}
uvwasi_errno_t ret = uvwasi_fd_seek(&uvwasi, fd, offset, whence, result);
//TODO: m3ApiWriteMem
m3ApiReturn(ret);
}
m3ApiRawFunction(m3_wasi_snapshot_preview1_fd_seek)
{
m3ApiReturnType (uint32_t)
m3ApiGetArg (uvwasi_fd_t , fd)
m3ApiGetArg (uvwasi_filedelta_t , offset)
m3ApiGetArg (uint32_t , whence)
m3ApiGetArgMem (uvwasi_filesize_t * , result)
uvwasi_errno_t ret = uvwasi_fd_seek(&uvwasi, fd, offset, whence, result);
//TODO: m3ApiWriteMem
m3ApiReturn(ret);
}
m3ApiRawFunction(m3_wasi_unstable_path_open)
{
m3ApiReturnType (uint32_t)
m3ApiGetArg (uvwasi_fd_t , dirfd)
m3ApiGetArg (uvwasi_lookupflags_t , dirflags)
m3ApiGetArgMem (const char * , path)
m3ApiGetArg (uvwasi_size_t , path_len)
m3ApiGetArg (uvwasi_oflags_t , oflags)
m3ApiGetArg (uvwasi_rights_t , fs_rights_base)
m3ApiGetArg (uvwasi_rights_t , fs_rights_inheriting)
m3ApiGetArg (uvwasi_fdflags_t , fs_flags)
m3ApiGetArgMem (uvwasi_fd_t * , fd)
uvwasi_errno_t ret = uvwasi_path_open(&uvwasi,
dirfd,
dirflags,
path,
path_len,
oflags,
fs_rights_base,
fs_rights_inheriting,
fs_flags,
fd);
//TODO: m3ApiWriteMem
m3ApiReturn(ret);
}
m3ApiRawFunction(m3_wasi_unstable_path_filestat_get)
{
m3ApiReturnType (uint32_t)
m3ApiGetArg (uvwasi_fd_t , fd)
m3ApiGetArg (uvwasi_lookupflags_t , flags)
m3ApiGetArgMem (const char * , path)
m3ApiGetArg (uint32_t , path_len)
m3ApiGetArgMem (uvwasi_filestat_t * , buf)
uvwasi_errno_t ret = uvwasi_path_filestat_get(&uvwasi, fd, flags, path, path_len, buf);
//TODO: m3ApiWriteMem
m3ApiReturn(ret);
}
m3ApiRawFunction(m3_wasi_unstable_fd_read)
{
m3ApiReturnType (uint32_t)
m3ApiGetArg (uvwasi_fd_t , fd)
m3ApiGetArgMem (wasi_iovec_t * , wasi_iovs)
m3ApiGetArg (uvwasi_size_t , iovs_len)
m3ApiGetArgMem (uvwasi_size_t * , nread)
#if defined(M3_COMPILER_MSVC)
if (iovs_len > 32) m3ApiReturn(UVWASI_EINVAL);
uvwasi_ciovec_t iovs[32];
#else
if (iovs_len > 128) m3ApiReturn(UVWASI_EINVAL);
uvwasi_ciovec_t iovs[iovs_len];
#endif
uvwasi_size_t num_read;
uvwasi_errno_t ret;
for (uvwasi_size_t i = 0; i < iovs_len; ++i) {
iovs[i].buf = m3ApiOffsetToPtr(m3ApiReadMem32(&wasi_iovs[i].buf));
iovs[i].buf_len = m3ApiReadMem32(&wasi_iovs[i].buf_len);
}
ret = uvwasi_fd_read(&uvwasi, fd, (const uvwasi_iovec_t *) iovs, iovs_len, &num_read);
m3ApiWriteMem32(nread, num_read);
m3ApiReturn(ret);
}
m3ApiRawFunction(m3_wasi_unstable_fd_write)
{
m3ApiReturnType (uint32_t)
m3ApiGetArg (uvwasi_fd_t , fd)
m3ApiGetArgMem (wasi_iovec_t * , wasi_iovs)
m3ApiGetArg (uvwasi_size_t , iovs_len)
m3ApiGetArgMem (uvwasi_size_t * , nwritten)
#if defined(M3_COMPILER_MSVC)
if (iovs_len > 32) m3ApiReturn(UVWASI_EINVAL);
uvwasi_ciovec_t iovs[32];
#else
if (iovs_len > 128) m3ApiReturn(UVWASI_EINVAL);
uvwasi_ciovec_t iovs[iovs_len];
#endif
uvwasi_size_t num_written;
uvwasi_errno_t ret;
for (uvwasi_size_t i = 0; i < iovs_len; ++i) {
iovs[i].buf = m3ApiOffsetToPtr(m3ApiReadMem32(&wasi_iovs[i].buf));
iovs[i].buf_len = m3ApiReadMem32(&wasi_iovs[i].buf_len);
}
ret = uvwasi_fd_write(&uvwasi, fd, iovs, iovs_len, &num_written);
m3ApiWriteMem32(nwritten, num_written);
m3ApiReturn(ret);
}
m3ApiRawFunction(m3_wasi_unstable_fd_readdir)
{
m3ApiReturnType (uint32_t)
m3ApiGetArg (uvwasi_fd_t , fd)
m3ApiGetArgMem (void * , buf)
m3ApiGetArg (uvwasi_size_t , buf_len)
m3ApiGetArg (uvwasi_dircookie_t , cookie)
m3ApiGetArgMem (uvwasi_size_t * , bufused)
uvwasi_size_t uvbufused;
uvwasi_errno_t ret = uvwasi_fd_readdir(&uvwasi, fd, buf, buf_len, cookie, &uvbufused);
m3ApiWriteMem32(bufused, uvbufused);
m3ApiReturn(ret);
}
m3ApiRawFunction(m3_wasi_unstable_fd_close)
{
m3ApiReturnType (uint32_t)
m3ApiGetArg (uvwasi_fd_t, fd)
uvwasi_errno_t ret = uvwasi_fd_close(&uvwasi, fd);
m3ApiReturn(ret);
}
m3ApiRawFunction(m3_wasi_unstable_fd_datasync)
{
m3ApiReturnType (uint32_t)
m3ApiGetArg (uvwasi_fd_t, fd)
uvwasi_errno_t ret = uvwasi_fd_datasync(&uvwasi, fd);
m3ApiReturn(ret);
}
m3ApiRawFunction(m3_wasi_unstable_random_get)
{
m3ApiReturnType (uint32_t)
m3ApiGetArgMem (uint8_t * , buf)
m3ApiGetArg (uvwasi_size_t , buflen)
uvwasi_errno_t ret = uvwasi_random_get(&uvwasi, buf, buflen);
m3ApiReturn(ret);
}
m3ApiRawFunction(m3_wasi_unstable_clock_res_get)
{
m3ApiReturnType (uint32_t)
m3ApiGetArg (uvwasi_clockid_t , wasi_clk_id)
m3ApiGetArgMem (uvwasi_timestamp_t * , resolution)
uvwasi_errno_t ret = uvwasi_clock_res_get(&uvwasi, wasi_clk_id, resolution);
//TODO: m3ApiWriteMem64
m3ApiReturn(ret);
}
m3ApiRawFunction(m3_wasi_unstable_clock_time_get)
{
m3ApiReturnType (uint32_t)
m3ApiGetArg (uvwasi_clockid_t , wasi_clk_id)
m3ApiGetArg (uvwasi_timestamp_t , precision)
m3ApiGetArgMem (uvwasi_timestamp_t * , time)
uvwasi_errno_t ret = uvwasi_clock_time_get(&uvwasi, wasi_clk_id, precision, time);
//TODO: m3ApiWriteMem64
m3ApiReturn(ret);
}
m3ApiRawFunction(m3_wasi_unstable_poll_oneoff)
{
m3ApiReturnType (uint32_t)
m3ApiGetArgMem (const uvwasi_subscription_t * , in)
m3ApiGetArgMem (uvwasi_event_t * , out)
m3ApiGetArg (uvwasi_size_t , nsubscriptions)
m3ApiGetArgMem (uvwasi_size_t * , nevents)
uvwasi_errno_t ret = uvwasi_poll_oneoff(&uvwasi, in, out, nsubscriptions, nevents);
//TODO: m3ApiWriteMem
m3ApiReturn(ret);
}
m3ApiRawFunction(m3_wasi_unstable_proc_exit)
{
m3ApiGetArg (uint32_t, code)
runtime->exit_code = code;
m3ApiTrap(m3Err_trapExit);
}
static
M3Result SuppressLookupFailure(M3Result i_result)
{
if (i_result == m3Err_functionLookupFailed)
return m3Err_none;
else
return i_result;
}
M3Result m3_LinkWASI (IM3Module module)
{
M3Result result = m3Err_none;
#define ENV_COUNT 9
char* env[ENV_COUNT];
env[0] = "TERM=xterm-256color";
env[1] = "COLORTERM=truecolor";
env[2] = "LANG=en_US.UTF-8";
env[3] = "PWD=/";
env[4] = "HOME=/";
env[5] = "PATH=/";
env[6] = "WASM3=1";
env[7] = "WASM3_ARCH=" M3_ARCH;
env[8] = NULL;
#define PREOPENS_COUNT 2
uvwasi_preopen_t preopens[PREOPENS_COUNT];
preopens[0].mapped_path = "/";
preopens[0].real_path = ".";
preopens[1].mapped_path = ".";
preopens[1].real_path = ".";
uvwasi_options_t init_options;
memset(&init_options, 0, sizeof(uvwasi_options_t));
init_options.in = 0;
init_options.out = 1;
init_options.err = 2;
init_options.fd_table_size = 3;
init_options.argc = 0; // runtime->argc is not initialized at this point, so we implement args_get directly
init_options.argv = NULL;
init_options.envp = (const char **) env;
init_options.preopenc = PREOPENS_COUNT;
init_options.preopens = preopens;
init_options.allocator = NULL;
uvwasi_errno_t ret = uvwasi_init(&uvwasi, &init_options);
if (ret != UVWASI_ESUCCESS) {
return "uvwasi_init failed";
}
static const char* namespaces[2] = { "wasi_unstable", "wasi_snapshot_preview1" };
// fd_seek is incompatible
_ (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)));
for (int i=0; i<2; i++)
{
const char* wasi = namespaces[i];
_ (SuppressLookupFailure (m3_LinkRawFunction (module, wasi, "args_get", "i(**)", &m3_wasi_unstable_args_get)));
_ (SuppressLookupFailure (m3_LinkRawFunction (module, wasi, "args_sizes_get", "i(**)", &m3_wasi_unstable_args_sizes_get)));
_ (SuppressLookupFailure (m3_LinkRawFunction (module, wasi, "clock_res_get", "i(i*)", &m3_wasi_unstable_clock_res_get)));
_ (SuppressLookupFailure (m3_LinkRawFunction (module, wasi, "clock_time_get", "i(iI*)", &m3_wasi_unstable_clock_time_get)));
_ (SuppressLookupFailure (m3_LinkRawFunction (module, wasi, "environ_get", "i(**)", &m3_wasi_unstable_environ_get)));
_ (SuppressLookupFailure (m3_LinkRawFunction (module, wasi, "environ_sizes_get", "i(**)", &m3_wasi_unstable_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_unstable_fd_close)));
_ (SuppressLookupFailure (m3_LinkRawFunction (module, wasi, "fd_datasync", "i(i)", &m3_wasi_unstable_fd_datasync)));
_ (SuppressLookupFailure (m3_LinkRawFunction (module, wasi, "fd_fdstat_get", "i(i*)", &m3_wasi_unstable_fd_fdstat_get)));
_ (SuppressLookupFailure (m3_LinkRawFunction (module, wasi, "fd_fdstat_set_flags", "i(ii)", &m3_wasi_unstable_fd_fdstat_set_flags)));
//_ (SuppressLookupFailure (m3_LinkRawFunction (module, wasi, "fd_fdstat_set_rights", "i(iII)", )));
//_ (SuppressLookupFailure (m3_LinkRawFunction (module, wasi, "fd_filestat_get", "i(i*)", )));
//_ (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_unstable_fd_prestat_get)));
_ (SuppressLookupFailure (m3_LinkRawFunction (module, wasi, "fd_prestat_dir_name", "i(i*i)", &m3_wasi_unstable_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_unstable_fd_read)));
_ (SuppressLookupFailure (m3_LinkRawFunction (module, wasi, "fd_readdir", "i(i*iI*)",&m3_wasi_unstable_fd_readdir)));
//_ (SuppressLookupFailure (m3_LinkRawFunction (module, wasi, "fd_renumber", "i(ii)", )));
//_ (SuppressLookupFailure (m3_LinkRawFunction (module, wasi, "fd_seek", "i(iIi*)", &m3_wasi_unstable_fd_seek)));
//_ (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_unstable_fd_write)));
//_ (SuppressLookupFailure (m3_LinkRawFunction (module, wasi, "path_create_directory", "i(i*i)", )));
_ (SuppressLookupFailure (m3_LinkRawFunction (module, wasi, "path_filestat_get", "i(ii*i*)", &m3_wasi_unstable_path_filestat_get)));
//_ (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_unstable_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_unstable_poll_oneoff)));
_ (SuppressLookupFailure (m3_LinkRawFunction (module, wasi, "proc_exit", "v(i)", &m3_wasi_unstable_proc_exit)));
//_ (SuppressLookupFailure (m3_LinkRawFunction (module, wasi, "proc_raise", "i(i)", )));
_ (SuppressLookupFailure (m3_LinkRawFunction (module, wasi, "random_get", "i(*i)", &m3_wasi_unstable_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_m3HasUVWASI