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Provide the C WASI implementation as an option.

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This adds the C WASI implementation as a new crate, wasmtime-wasi-c,
and adds a command-line flag to the wasmtime command-line driver to
select which WASI implementation to use.
This commit is contained in:
Dan Gohman
2019-05-19 20:17:38 -07:00
parent d57fbc7d0c
commit 06b6ec42b9
39 changed files with 9597 additions and 16 deletions
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1
Cargo.toml
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@@ -31,6 +31,7 @@ wasmtime-jit = { path = "wasmtime-jit" }
wasmtime-obj = { path = "wasmtime-obj" } wasmtime-obj = { path = "wasmtime-obj" }
wasmtime-wast = { path = "wasmtime-wast" } wasmtime-wast = { path = "wasmtime-wast" }
wasmtime-wasi = { path = "wasmtime-wasi" } wasmtime-wasi = { path = "wasmtime-wasi" }
wasmtime-wasi-c = { path = "wasmtime-wasi-c" }
docopt = "1.0.1" docopt = "1.0.1"
serde = "1.0.75" serde = "1.0.75"
serde_derive = "1.0.75" serde_derive = "1.0.75"

28
src/wasmtime.rs
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@@ -50,6 +50,7 @@ use std::process::exit;
use wabt; use wabt;
use wasmtime_jit::{ActionOutcome, Context}; use wasmtime_jit::{ActionOutcome, Context};
use wasmtime_wasi::instantiate_wasi; use wasmtime_wasi::instantiate_wasi;
use wasmtime_wasi_c::instantiate_wasi_c;
use wasmtime_wast::instantiate_spectest; use wasmtime_wast::instantiate_spectest;
static LOG_FILENAME_PREFIX: &str = "wasmtime.dbg."; static LOG_FILENAME_PREFIX: &str = "wasmtime.dbg.";
@@ -62,8 +63,8 @@ including calling the start function if one is present. Additional functions
given with --invoke are then called. given with --invoke are then called.
Usage: Usage:
wasmtime [-odg] [--preload=<wasm>...] [--env=<env>...] [--dir=<dir>...] [--mapdir=<mapping>...] <file> [<arg>...] wasmtime [-odg] [--wasi-common] [--preload=<wasm>...] [--env=<env>...] [--dir=<dir>...] [--mapdir=<mapping>...] <file> [<arg>...]
wasmtime [-odg] [--preload=<wasm>...] [--env=<env>...] [--dir=<dir>...] [--mapdir=<mapping>...] --invoke=<fn> <file> [<arg>...] wasmtime [-odg] [--wasi-common] [--preload=<wasm>...] [--env=<env>...] [--dir=<dir>...] [--mapdir=<mapping>...] --invoke=<fn> <file> [<arg>...]
wasmtime --help | --version wasmtime --help | --version
Options: Options:
@@ -71,6 +72,7 @@ Options:
-o, --optimize runs optimization passes on the translated functions -o, --optimize runs optimization passes on the translated functions
-g generate debug information -g generate debug information
-d, --debug enable debug output on stderr/stdout -d, --debug enable debug output on stderr/stdout
--wasi-common enable the wasi-common implementation of WASI
--preload=<wasm> load an additional wasm module before loading the main module --preload=<wasm> load an additional wasm module before loading the main module
--env=<env> pass an environment variable (\"key=value\") to the program --env=<env> pass an environment variable (\"key=value\") to the program
--dir=<dir> grant access to the given host directory --dir=<dir> grant access to the given host directory
@@ -92,6 +94,7 @@ struct Args {
flag_env: Vec<String>, flag_env: Vec<String>,
flag_dir: Vec<String>, flag_dir: Vec<String>,
flag_mapdir: Vec<String>, flag_mapdir: Vec<String>,
flag_wasi_common: bool,
} }
fn read_to_end(path: PathBuf) -> Result<Vec<u8>, io::Error> { fn read_to_end(path: PathBuf) -> Result<Vec<u8>, io::Error> {
@@ -228,20 +231,15 @@ fn main() {
let preopen_dirs = compute_preopen_dirs(&args.flag_dir, &args.flag_mapdir); let preopen_dirs = compute_preopen_dirs(&args.flag_dir, &args.flag_mapdir);
let argv = compute_argv(&args.arg_file, &args.arg_arg); let argv = compute_argv(&args.arg_file, &args.arg_arg);
let environ = compute_environ(&args.flag_env); let environ = compute_environ(&args.flag_env);
context.name_instance(
"wasi_unstable".to_owned(),
instantiate_wasi("", global_exports, &preopen_dirs, &argv, &environ)
.expect("instantiating wasi"),
);
// FIXME: Also recognize "env", for compatibility with clang/llvm 8.0. And use let wasi = if args.flag_wasi_common {
// "__wasi_" prefixes for compatibility with prototype reference-sysroot. instantiate_wasi("", global_exports, &preopen_dirs, &argv, &environ)
let global_exports = context.get_global_exports(); } else {
context.name_instance( instantiate_wasi_c("", global_exports, &preopen_dirs, &argv, &environ)
"env".to_owned(), }
instantiate_wasi("__wasi_", global_exports, &preopen_dirs, &argv, &environ) .expect("instantiating wasi");
.expect("instantiating wasi"),
); context.name_instance("wasi_unstable".to_owned(), wasi);
// Enable/disable producing of debug info. // Enable/disable producing of debug info.
context.set_debug_info(args.flag_g); context.set_debug_info(args.flag_g);

30
wasmtime-wasi-c/Cargo.toml Normal file
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@@ -0,0 +1,30 @@
[package]
name = "wasmtime-wasi-c"
version = "0.0.0"
authors = ["The Cranelift Project Developers"]
publish = false
description = "WASI API support for Wasmtime"
categories = ["wasm"]
repository = "https://github.com/CraneStation/wasmtime"
license = "Apache-2.0 WITH LLVM-exception"
readme = "README.md"
[dependencies]
wasmtime-runtime = { path = "../wasmtime-runtime" }
wasmtime-environ = { path = "../wasmtime-environ" }
wasmtime-jit = { path = "../wasmtime-jit" }
cranelift-codegen = "0.30.0"
cranelift-entity = "0.30.0"
cranelift-wasm = "0.30.0"
target-lexicon = "0.3.0"
cast = { version = "0.2.2", default-features = false }
log = { version = "0.4.6", default-features = false }
libc = "0.2.50"
[build-dependencies]
cmake = "0.1.35"
bindgen = "0.49.0"
[badges]
maintenance = { status = "experimental" }
travis-ci = { repository = "CraneStation/wasmtime" }

220
wasmtime-wasi-c/LICENSE Normal file
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@@ -0,0 +1,220 @@
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8
wasmtime-wasi-c/README.md Normal file
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@@ -0,0 +1,8 @@
This is the `wasmtime-wasi-c` crate, which implements the
WebAssembly System Interface (WASI) API in C.
WASI is greatly inspired by and directly derived from [CloudABI].
It differs in that it has aspirations to expand to a greater
scope, and to better support the needs of WebAssembly engines.
[CloudABI]: https://cloudabi.org/

36
wasmtime-wasi-c/build.rs Normal file
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@@ -0,0 +1,36 @@
extern crate bindgen;
extern crate cmake;
use cmake::Config;
use std::env;
use std::path::PathBuf;
fn main() {
let dst = Config::new("sandboxed-system-primitives").build();
println!("cargo:rustc-link-search=native={}", dst.display());
println!("cargo:rustc-link-lib=static=SandboxedSystemPrimitives");
let bindings_builder = bindgen::Builder::default()
.header("sandboxed-system-primitives/include/wasmtime_ssp.h")
.header("sandboxed-system-primitives/src/posix.h")
.whitelist_function("wasmtime_ssp_.*")
.whitelist_function("fd_table_init")
.whitelist_function("fd_table_insert_existing")
.whitelist_function("fd_prestats_init")
.whitelist_function("fd_prestats_insert")
.whitelist_function("argv_environ_init")
.whitelist_type("__wasi_.*")
.whitelist_type("fd_table")
.whitelist_type("fd_prestats")
.whitelist_type("argv_environ_values")
.whitelist_var("__WASI_.*");
let out_path = PathBuf::from(env::var("OUT_DIR").unwrap());
bindings_builder
.generate()
.expect("Unable to generate bindings")
.write_to_file(out_path.join("wasmtime_ssp.rs"))
.expect("Couldn't write bindings!");
}

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18
wasmtime-wasi-c/js-polyfill/build.sh Executable file
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@@ -0,0 +1,18 @@
#!/bin/bash
set -euo pipefail
EMCC=emcc
# TODO: Remove the clang include once Emscripten supports <stdatomic.h>
"$EMCC" ../sandboxed-system-primitives/src/*.c \
-DWASMTIME_SSP_WASI_API \
-DWASMTIME_SSP_STATIC_CURFDS \
-I../sandboxed-system-primitives/include \
-Iclang \
--shell-file shell.html \
polyfill.c \
-s WARN_ON_UNDEFINED_SYMBOLS=0 \
-s EXPORTED_FUNCTIONS="['_main', '_handleFiles', '___wasi_args_get', '___wasi_args_sizes_get', '___wasi_clock_res_get', '___wasi_clock_time_get', '___wasi_environ_get', '___wasi_environ_sizes_get', '___wasi_fd_prestat_get', '___wasi_fd_prestat_dir_name', '___wasi_fd_close', '___wasi_fd_datasync', '___wasi_fd_pread', '___wasi_fd_pwrite', '___wasi_fd_read', '___wasi_fd_renumber', '___wasi_fd_seek', '___wasi_fd_tell', '___wasi_fd_fdstat_get', '___wasi_fd_fdstat_set_flags', '___wasi_fd_fdstat_set_rights', '___wasi_fd_sync', '___wasi_fd_write', '___wasi_fd_advise', '___wasi_fd_allocate', '___wasi_path_create_directory', '___wasi_path_link', '___wasi_path_open', '___wasi_fd_readdir', '___wasi_path_readlink', '___wasi_path_rename', '___wasi_fd_filestat_get', '___wasi_fd_filestat_set_times', '___wasi_fd_filestat_set_size', '___wasi_path_filestat_get', '___wasi_path_filestat_set_times', '___wasi_path_symlink', '___wasi_path_unlink_file', '___wasi_path_remove_directory', '___wasi_poll_oneoff', '___wasi_proc_exit', '___wasi_proc_raise', '___wasi_random_get', '___wasi_sched_yield', '___wasi_sock_recv', '___wasi_sock_send', '___wasi_sock_shutdown']" \
--pre-js wasi.js \
-o polyfill.html

190
wasmtime-wasi-c/js-polyfill/clang/stdatomic.h Normal file
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@@ -0,0 +1,190 @@
/*===---- stdatomic.h - Standard header for atomic types and operations -----===
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*
*===-----------------------------------------------------------------------===
*/
#ifndef __CLANG_STDATOMIC_H
#define __CLANG_STDATOMIC_H
/* If we're hosted, fall back to the system's stdatomic.h. FreeBSD, for
* example, already has a Clang-compatible stdatomic.h header.
*/
#if __STDC_HOSTED__ && __has_include_next(<stdatomic.h>)
# include_next <stdatomic.h>
#else
#include <stddef.h>
#include <stdint.h>
#ifdef __cplusplus
extern "C" {
#endif
/* 7.17.1 Introduction */
#define ATOMIC_BOOL_LOCK_FREE __CLANG_ATOMIC_BOOL_LOCK_FREE
#define ATOMIC_CHAR_LOCK_FREE __CLANG_ATOMIC_CHAR_LOCK_FREE
#define ATOMIC_CHAR16_T_LOCK_FREE __CLANG_ATOMIC_CHAR16_T_LOCK_FREE
#define ATOMIC_CHAR32_T_LOCK_FREE __CLANG_ATOMIC_CHAR32_T_LOCK_FREE
#define ATOMIC_WCHAR_T_LOCK_FREE __CLANG_ATOMIC_WCHAR_T_LOCK_FREE
#define ATOMIC_SHORT_LOCK_FREE __CLANG_ATOMIC_SHORT_LOCK_FREE
#define ATOMIC_INT_LOCK_FREE __CLANG_ATOMIC_INT_LOCK_FREE
#define ATOMIC_LONG_LOCK_FREE __CLANG_ATOMIC_LONG_LOCK_FREE
#define ATOMIC_LLONG_LOCK_FREE __CLANG_ATOMIC_LLONG_LOCK_FREE
#define ATOMIC_POINTER_LOCK_FREE __CLANG_ATOMIC_POINTER_LOCK_FREE
/* 7.17.2 Initialization */
#define ATOMIC_VAR_INIT(value) (value)
#define atomic_init __c11_atomic_init
/* 7.17.3 Order and consistency */
typedef enum memory_order {
memory_order_relaxed = __ATOMIC_RELAXED,
memory_order_consume = __ATOMIC_CONSUME,
memory_order_acquire = __ATOMIC_ACQUIRE,
memory_order_release = __ATOMIC_RELEASE,
memory_order_acq_rel = __ATOMIC_ACQ_REL,
memory_order_seq_cst = __ATOMIC_SEQ_CST
} memory_order;
#define kill_dependency(y) (y)
/* 7.17.4 Fences */
/* These should be provided by the libc implementation. */
void atomic_thread_fence(memory_order);
void atomic_signal_fence(memory_order);
#define atomic_thread_fence(order) __c11_atomic_thread_fence(order)
#define atomic_signal_fence(order) __c11_atomic_signal_fence(order)
/* 7.17.5 Lock-free property */
#define atomic_is_lock_free(obj) __c11_atomic_is_lock_free(sizeof(*(obj)))
/* 7.17.6 Atomic integer types */
#ifdef __cplusplus
typedef _Atomic(bool) atomic_bool;
#else
typedef _Atomic(_Bool) atomic_bool;
#endif
typedef _Atomic(char) atomic_char;
typedef _Atomic(signed char) atomic_schar;
typedef _Atomic(unsigned char) atomic_uchar;
typedef _Atomic(short) atomic_short;
typedef _Atomic(unsigned short) atomic_ushort;
typedef _Atomic(int) atomic_int;
typedef _Atomic(unsigned int) atomic_uint;
typedef _Atomic(long) atomic_long;
typedef _Atomic(unsigned long) atomic_ulong;
typedef _Atomic(long long) atomic_llong;
typedef _Atomic(unsigned long long) atomic_ullong;
typedef _Atomic(uint_least16_t) atomic_char16_t;
typedef _Atomic(uint_least32_t) atomic_char32_t;
typedef _Atomic(wchar_t) atomic_wchar_t;
typedef _Atomic(int_least8_t) atomic_int_least8_t;
typedef _Atomic(uint_least8_t) atomic_uint_least8_t;
typedef _Atomic(int_least16_t) atomic_int_least16_t;
typedef _Atomic(uint_least16_t) atomic_uint_least16_t;
typedef _Atomic(int_least32_t) atomic_int_least32_t;
typedef _Atomic(uint_least32_t) atomic_uint_least32_t;
typedef _Atomic(int_least64_t) atomic_int_least64_t;
typedef _Atomic(uint_least64_t) atomic_uint_least64_t;
typedef _Atomic(int_fast8_t) atomic_int_fast8_t;
typedef _Atomic(uint_fast8_t) atomic_uint_fast8_t;
typedef _Atomic(int_fast16_t) atomic_int_fast16_t;
typedef _Atomic(uint_fast16_t) atomic_uint_fast16_t;
typedef _Atomic(int_fast32_t) atomic_int_fast32_t;
typedef _Atomic(uint_fast32_t) atomic_uint_fast32_t;
typedef _Atomic(int_fast64_t) atomic_int_fast64_t;
typedef _Atomic(uint_fast64_t) atomic_uint_fast64_t;
typedef _Atomic(intptr_t) atomic_intptr_t;
typedef _Atomic(uintptr_t) atomic_uintptr_t;
typedef _Atomic(size_t) atomic_size_t;
typedef _Atomic(ptrdiff_t) atomic_ptrdiff_t;
typedef _Atomic(intmax_t) atomic_intmax_t;
typedef _Atomic(uintmax_t) atomic_uintmax_t;
/* 7.17.7 Operations on atomic types */
#define atomic_store(object, desired) __c11_atomic_store(object, desired, __ATOMIC_SEQ_CST)
#define atomic_store_explicit __c11_atomic_store
#define atomic_load(object) __c11_atomic_load(object, __ATOMIC_SEQ_CST)
#define atomic_load_explicit __c11_atomic_load
#define atomic_exchange(object, desired) __c11_atomic_exchange(object, desired, __ATOMIC_SEQ_CST)
#define atomic_exchange_explicit __c11_atomic_exchange
#define atomic_compare_exchange_strong(object, expected, desired) __c11_atomic_compare_exchange_strong(object, expected, desired, __ATOMIC_SEQ_CST, __ATOMIC_SEQ_CST)
#define atomic_compare_exchange_strong_explicit __c11_atomic_compare_exchange_strong
#define atomic_compare_exchange_weak(object, expected, desired) __c11_atomic_compare_exchange_weak(object, expected, desired, __ATOMIC_SEQ_CST, __ATOMIC_SEQ_CST)
#define atomic_compare_exchange_weak_explicit __c11_atomic_compare_exchange_weak
#define atomic_fetch_add(object, operand) __c11_atomic_fetch_add(object, operand, __ATOMIC_SEQ_CST)
#define atomic_fetch_add_explicit __c11_atomic_fetch_add
#define atomic_fetch_sub(object, operand) __c11_atomic_fetch_sub(object, operand, __ATOMIC_SEQ_CST)
#define atomic_fetch_sub_explicit __c11_atomic_fetch_sub
#define atomic_fetch_or(object, operand) __c11_atomic_fetch_or(object, operand, __ATOMIC_SEQ_CST)
#define atomic_fetch_or_explicit __c11_atomic_fetch_or
#define atomic_fetch_xor(object, operand) __c11_atomic_fetch_xor(object, operand, __ATOMIC_SEQ_CST)
#define atomic_fetch_xor_explicit __c11_atomic_fetch_xor
#define atomic_fetch_and(object, operand) __c11_atomic_fetch_and(object, operand, __ATOMIC_SEQ_CST)
#define atomic_fetch_and_explicit __c11_atomic_fetch_and
/* 7.17.8 Atomic flag type and operations */
typedef struct atomic_flag { atomic_bool _Value; } atomic_flag;
#define ATOMIC_FLAG_INIT { 0 }
/* These should be provided by the libc implementation. */
#ifdef __cplusplus
bool atomic_flag_test_and_set(volatile atomic_flag *);
bool atomic_flag_test_and_set_explicit(volatile atomic_flag *, memory_order);
#else
_Bool atomic_flag_test_and_set(volatile atomic_flag *);
_Bool atomic_flag_test_and_set_explicit(volatile atomic_flag *, memory_order);
#endif
void atomic_flag_clear(volatile atomic_flag *);
void atomic_flag_clear_explicit(volatile atomic_flag *, memory_order);
#define atomic_flag_test_and_set(object) __c11_atomic_exchange(&(object)->_Value, 1, __ATOMIC_SEQ_CST)
#define atomic_flag_test_and_set_explicit(object, order) __c11_atomic_exchange(&(object)->_Value, 1, order)
#define atomic_flag_clear(object) __c11_atomic_store(&(object)->_Value, 0, __ATOMIC_SEQ_CST)
#define atomic_flag_clear_explicit(object, order) __c11_atomic_store(&(object)->_Value, 0, order)
#ifdef __cplusplus
}
#endif
#endif /* __STDC_HOSTED__ */
#endif /* __CLANG_STDATOMIC_H */

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wasmtime-wasi-c/js-polyfill/polyfill.c Normal file
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#include <emscripten.h>
#include "wasmtime_ssp.h"
#include "../src/posix.h"
static __thread struct fd_table curfds_pointee;
int main(int argc, char *argv[]) {
return 0;
}
void handleFiles(void) {
struct fd_table *curfds = &curfds_pointee;
fd_table_init(curfds);
// Prepopulate curfds with stdin, stdout, and stderr file descriptors.
if (!fd_table_insert_existing(curfds, 0, 0))
__builtin_trap();
if (!fd_table_insert_existing(curfds, 1, 1))
__builtin_trap();
if (!fd_table_insert_existing(curfds, 2, 2))
__builtin_trap();
EM_ASM(" \
const imports = { wasi_unstable: WASIPolyfill }; \
let file = document.getElementById('input').files[0]; \
let file_with_mime_type = file.slice(0, file.size, 'application/wasm'); \
let response = new Response(file_with_mime_type); \
wasi_instantiateStreaming(response, imports) \
.then(obj => { \
setInstance(obj.instance); \
try { \
obj.instance.exports._start(); \
} catch (e) { \
if (e instanceof WASIExit) { \
handleWASIExit(e); \
} else { \
} \
} \
}) \
.catch(error => { \
console.log('error! ' + error); \
}); \
");
}

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wasmtime-wasi-c/js-polyfill/shell.html Normal file
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<!doctype html>
<!-- This file is derived from src/shell_minimal.html in Emscripten. -->
<html lang="en-us">
<head>
<meta charset="utf-8">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>WASI Web Polyfill</title>
<style>
.wasi { padding-right: 0; margin-left: auto; margin-right: auto; display: block; }
textarea.wasi { font-family: monospace; width: 80%; }
div.wasi { text-align: center; }
div.wasi_border { border: 1px solid black; }
</style>
</head>
<body>
<figure style="overflow:visible;" id="spinner"><div class="spinner"></div><center style="margin-top:0.5em"><strong>WASI</strong></center></figure>
<div class="wasi" id="status">Downloading...</div>
<div class="wasi">
<progress value="0" max="100" id="progress" hidden=1></progress>
</div>
<img class="wasi" src="WASI-small.png" width="200" height="200" border="0" alt="WASI logo">
<input class="wasi" type="file" id="input" onchange="_handleFiles(this.files)">
<hr>
<textarea class="wasi" id="output" rows="8"></textarea>
<script type='text/javascript'>
var statusElement = document.getElementById('status');
var progressElement = document.getElementById('progress');
var spinnerElement = document.getElementById('spinner');
var Module = {
preRun: [],
postRun: [],
print: (function() {
var element = document.getElementById('output');
if (element) element.value = ''; // clear browser cache
return function(text) {
if (arguments.length > 1) text = Array.prototype.slice.call(arguments).join(' ');
console.log(text);
if (element) {
element.value += text + "\n";
element.scrollTop = element.scrollHeight; // focus on bottom
}
};
})(),
printErr: function(text) {
if (arguments.length > 1) text = Array.prototype.slice.call(arguments).join(' ');
console.error(text);
},
setStatus: function(text) {
if (!Module.setStatus.last) Module.setStatus.last = { time: Date.now(), text: '' };
if (text === Module.setStatus.last.text) return;
var m = text.match(/([^(]+)\((\d+(\.\d+)?)\/(\d+)\)/);
var now = Date.now();
if (m && now - Module.setStatus.last.time < 30) return; // if this is a progress update, skip it if too soon
Module.setStatus.last.time = now;
Module.setStatus.last.text = text;
if (m) {
text = m[1];
progressElement.value = parseInt(m[2])*100;
progressElement.max = parseInt(m[4])*100;
progressElement.hidden = false;
spinnerElement.hidden = false;
} else {
progressElement.value = null;
progressElement.max = null;
progressElement.hidden = true;
if (!text) spinnerElement.hidden = true;
}
statusElement.innerHTML = text;
},
totalDependencies: 0,
monitorRunDependencies: function(left) {
this.totalDependencies = Math.max(this.totalDependencies, left);
Module.setStatus(left ? 'Preparing... (' + (this.totalDependencies-left) + '/' + this.totalDependencies + ')' : 'All downloads complete.');
}
};
Module.setStatus('Downloading...');
window.onerror = function() {
Module.setStatus('Exception thrown, see JavaScript console');
spinnerElement.style.display = 'none';
Module.setStatus = function(text) {
if (text) Module.printErr('[post-exception status] ' + text);
};
};
</script>
{{{ SCRIPT }}}
</body>
</html>

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wasmtime-wasi-c/js-polyfill/wasi.js Normal file
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// To implement `proc_exit`, we define a custom exception object
// that we can throw to unwind the stack and carry the exit value.
function WASIExit(return_value, message, fileName, lineNumber) {
let instance = new Error(message, fileName, lineNumber);
instance.return_value = return_value;
Object.setPrototypeOf(instance, Object.getPrototypeOf(this));
if (Error.captureStackTrace) {
Error.captureStackTrace(instance, WASIExit);
}
return instance;
}
WASIExit.prototype = Object.create(Error.prototype, {
constructor: {
value: Error,
enumerable: false,
writable: true,
configurable: true
}
});
if (Object.setPrototypeOf) {
Object.setPrototypeOf(WASIExit, Error);
} else {
WASIExit.__proto__ = Error;
}
function handleWASIExit(e) {
if (e.return_value != 0) {
console.log('program exited with non-zero exit status ' + e.return_value);
}
}
// Safari doesn't have instantiateStreaming
function wasi_instantiateStreaming(response, imports) {
if (WebAssembly && WebAssembly.instantiateStreaming) {
return WebAssembly.instantiateStreaming(response, imports);
}
return response.arrayBuffer()
.then(function(buffer) {
return WebAssembly.instantiate(buffer, imports);
});
}
// The current guest wasm instance.
var currentInstance;
// There are two heaps in play, the guest heap, which belongs to the WASI-using
// program, and the host heap, which belongs to the Emscripten-compiled polyfill
// library. The following declare support for the guest heap in a similar manner
// to Emscripten's heap.
var GUEST_HEAP,
/** @type {ArrayBuffer} */
GUEST_buffer,
/** @type {Int8Array} */
GUEST_HEAP8,
/** @type {Uint8Array} */
GUEST_HEAPU8,
/** @type {Int16Array} */
GUEST_HEAP16,
/** @type {Uint16Array} */
GUEST_HEAPU16,
/** @type {Int32Array} */
GUEST_HEAP32,
/** @type {Uint32Array} */
GUEST_HEAPU32,
/** @type {Float32Array} */
GUEST_HEAPF32,
/** @type {Float64Array} */
GUEST_HEAPF64;
function setInstance(instance) {
currentInstance = instance;
updateGuestBuffer();
}
/// We call updateGuestBuffer any time the guest's memory may have changed,
/// such as when creating a new instance, or after calling _malloc.
function updateGuestBuffer() {
var buf = currentInstance.exports.memory.buffer;
Module['GUEST_buffer'] = GUEST_buffer = buf;
Module['GUEST_HEAP8'] = GUEST_HEAP8 = new Int8Array(GUEST_buffer);
Module['GUEST_HEAP16'] = GUEST_HEAP16 = new Int16Array(GUEST_buffer);
Module['GUEST_HEAP32'] = GUEST_HEAP32 = new Int32Array(GUEST_buffer);
Module['GUEST_HEAPU8'] = GUEST_HEAPU8 = new Uint8Array(GUEST_buffer);
Module['GUEST_HEAPU16'] = GUEST_HEAPU16 = new Uint16Array(GUEST_buffer);
Module['GUEST_HEAPU32'] = GUEST_HEAPU32 = new Uint32Array(GUEST_buffer);
Module['GUEST_HEAPF32'] = GUEST_HEAPF32 = new Float32Array(GUEST_buffer);
Module['GUEST_HEAPF64'] = GUEST_HEAPF64 = new Float64Array(GUEST_buffer);
}
function copyin_bytes(src, len) {
let dst = _malloc(len);
updateGuestBuffer();
for (let i = 0; i < len; ++i) {
HEAP8[dst + i] = GUEST_HEAP8[src + i];
}
return dst;
}
function copyout_bytes(dst, src, len) {
updateGuestBuffer();
for (let i = 0; i < len; ++i) {
GUEST_HEAP8[dst + i] = HEAP8[src + i];
}
_free(src);
}
function copyout_i32(dst, src) {
updateGuestBuffer();
GUEST_HEAP32[dst>>2] = HEAP32[src>>2];
_free(src);
}
function copyout_i64(dst, src) {
updateGuestBuffer();
GUEST_HEAP32[dst>>2] = HEAP32[src>>2];
GUEST_HEAP32[(dst + 4)>>2] = HEAP32[(src + 4)>>2];
_free(src);
}
function translate_ciovs(iovs, iovs_len) {
host_iovs = _malloc(8 * iovs_len);
updateGuestBuffer();
for (let i = 0; i < iovs_len; ++i) {
let ptr = GUEST_HEAP32[(iovs + i * 8 + 0) >> 2];
let len = GUEST_HEAP32[(iovs + i * 8 + 4) >> 2];
let buf = copyin_bytes(ptr, len);
HEAP32[(host_iovs + i * 8 + 0)>>2] = buf;
HEAP32[(host_iovs + i * 8 + 4)>>2] = len;
}
return host_iovs;
}
function free_ciovs(host_iovs, iovs_len) {
for (let i = 0; i < iovs_len; ++i) {
let buf = HEAP32[(host_iovs + i * 8 + 0) >> 2];
_free(buf);
}
_free(host_iovs);
}
function translate_iovs(iovs, iovs_len) {
host_iovs = _malloc(8 * iovs_len);
updateGuestBuffer();
for (let i = 0; i < iovs_len; ++i) {
let len = GUEST_HEAP32[(iovs + i * 8 + 4) >> 2];
let buf = _malloc(len);
updateGuestBuffer();
HEAP32[(host_iovs + i * 8 + 0)>>2] = buf;
HEAP32[(host_iovs + i * 8 + 4)>>2] = len;
}
return host_iovs;
}
function free_iovs(host_iovs, iovs_len, iovs) {
updateGuestBuffer();
for (let i = 0; i < iovs_len; ++i) {
let buf = HEAP32[(host_iovs + i * 8 + 0) >> 2];
let len = HEAP32[(host_iovs + i * 8 + 4) >> 2];
let ptr = GUEST_HEAP32[(iovs + i * 8 + 0) >> 2];
copyout_bytes(ptr, buf, len);
}
_free(host_iovs);
}
var WASIPolyfill = {
args_get: function(argv, argv_buf) {
return 0;
},
args_sizes_get: function(argc, argv_buf_size) {
updateGuestBuffer();
// TODO: Implement command-line arguments.
GUEST_HEAP32[(argc) >> 2] = 0;
GUEST_HEAP32[(argv_buf_size) >> 2] = 0;
return 0;
},
clock_res_get: function(clock_id, resolution) {
let host_resolution = _malloc(8);
let ret = ___wasi_clock_res_get(clock_id, host_resolution);
copyout_i64(resolution, host_resolution);
return ret;
},
clock_time_get: function(clock_id, precision, time) {
let host_time = _malloc(8);
let ret = ___wasi_clock_time_get(clock_id, precision, host_time);
copyout_i64(time, host_time);
return ret;
},
environ_get: function(environ, environ_buf) {
return 0;
},
environ_sizes_get: function(environ_size, environ_buf_size) {
updateGuestBuffer();
// TODO: Implement environment variables.
GUEST_HEAP32[(environ_size) >> 2] = 0;
GUEST_HEAP32[(environ_buf_size) >> 2] = 0;
return 0;
},
fd_prestat_get: function(fd, buf) {
let host_buf = _malloc(8); // sizeof __wasi_prestat_t
let ret = ___wasi_fd_prestat_get(fd, host_buf);
copyout_bytes(buf, host_buf, 8);
return ret;
},
fd_prestat_dir_name: function(fd, path, path_len) {
let host_buf = _malloc(path_len);
let ret = ___wasi_fd_prestat_get(fd, host_buf, path_len);
copyout_bytes(buf, host_buf, path_len);
return ret;
},
fd_close: function(fd) {
return ___wasi_fd_close(fd);
},
fd_datasync: function(fd) {
return ___wasi_fd_datasync(fd);
},
fd_pread: function(fd, iovs, iovs_len, offset, nread) {
let host_iovs = translate_iovs(iovs, iovs_len);
let host_nread = _malloc(4);
let ret = ___wasi_fd_pread(fd, host_iovs, iovs_len, offset, host_nread);
copyout_i32(nread, host_nread);
free_iovs(host_iovs, iovs_len, iovs);
return ret;
},
fd_pwrite: function(fd, iovs, iovs_len, offset, nwritten) {
let host_iovs = translate_ciovs(iovs, iovs_len);
let host_nwritten = _malloc(4);
let ret = ___wasi_fd_pwrite(fd, host_iovs, iovs_len, offset, host_nwritten);
copyout_i32(nwritten, host_nwritten);
free_ciovs(host_iovs, iovs_len);
return ret;
},
fd_read: function(fd, iovs, iovs_len, nread) {
let host_iovs = translate_iovs(iovs, iovs_len);
let host_nread = _malloc(4);
let ret = ___wasi_fd_read(fd, host_iovs, iovs_len, host_nread);
copyout_i32(nread, host_nread);
free_iovs(host_iovs, iovs_len, iovs);
return ret;
},
fd_renumber: function(from, to) {
return ___wasi_fd_renumber(from, to);
},
fd_seek: function(fd, offset, whence, newoffset) {
let host_newoffset = _malloc(8);
let ret = ___wasi_fd_seek(fd, offset, whence, host_newoffset);
copyout_i64(newoffset, host_newoffset);
return ret;
},
fd_tell: function(fd, newoffset) {
let host_newoffset = _malloc(8);
let ret = ___wasi_fd_seek(fd, host_newoffset);
copyout_i64(newoffset, host_newoffset);
return ret;
},
fd_fdstat_get: function(fd, buf) {
let host_buf = _malloc(24); // sizeof __wasi_fdstat_t
let ret = ___wasi_fd_fdstat_get(fd, host_buf);
copyout_bytes(buf, host_buf, 24);
return ret;
},
fd_fdstat_set_flags: function(fd, flags) {
return ___wasi_fd_fdstat_set_flags(fd, flags);
},
fd_fdstat_set_rights: function(fd, fs_rights_base, fs_rights_inheriting) {
return ___wasi_fd_fdstat_set_rights(fd, fs_rights_base, fs_rights_inheriting);
},
fd_sync: function(fd) {
return ___wasi_fd_sync(fd);
},
fd_write: function(fd, iovs, iovs_len, nwritten) {
let host_iovs = translate_ciovs(iovs, iovs_len);
let host_nwritten = _malloc(4);
let ret = ___wasi_fd_write(fd, host_iovs, iovs_len, host_nwritten);
copyout_i32(nwritten, host_nwritten);
free_ciovs(host_iovs, iovs_len);
return ret;
},
fd_advise: function(fd, offset, len, advice) {
return ___wasi_fd_advise(fd, offset, len, advice);
},
fd_allocate: function(fd, offset, len) {
return ___wasi_fd_allocate(fd, offset, len);
},
path_create_directory: function(fd, path, path_len) {
let host_path = copyin_bytes(path, path_len);
let ret = ___wasi_path_create_directory(fd, host_path, path_len);
_free(host_path);
return ret;
},
path_link: function(fd0, path0, path_len0, fd1, path1, path_len1) {
let host_path0 = copyin_bytes(path0, path_len0);
let host_path1 = copyin_bytes(path1, path_len1);
let ret = ___wasi_path_link(fd, host_path0, path_len0, fd1, host_path1, path1_len);
_free(host_path1);
_free(host_path0);
return ret;
},
path_open: function(dirfd, dirflags, path, path_len, oflags, fs_rights_base, fs_rights_inheriting, fs_flags, fd) {
let host_path = copyin_bytes(path, path_len);
let host_fd = _malloc(4);
let ret = ___wasi_path_open(dirfd, dirflags, host_path, path_len, oflags, fs_rights_base, fs_rights_inheriting, fs_flags, host_fd);
copyout_i32(fd, host_fd);
_free(host_path);
return ret;
},
fd_readdir: function(fd, buf, buf_len, cookie, buf_used) {
let host_buf = _malloc(buf_len);
let host_buf_used = _malloc(4);
let ret = ___wasi_fd_readdir(fd, buf, buf_len, cookie, host_buf_used);
copyout_i32(buf_used, host_buf_used);
copyout_bytes(buf, host_buf, buf_len);
return ret;
},
path_readlink: function(fd, path, path_len, buf, buf_len, buf_used) {
let host_path = copyin_bytes(path, path_len);
let host_buf = _malloc(buf_len);
let host_buf_used = _malloc(4);
let ret = ___wasi_path_readlink(fd, path, path_len, buf, buf_len, host_buf_used);
copyout_i32(buf_used, host_buf_used);
copyout_bytes(buf, host_buf, buf_len);
_free(host_path);
return ret;
},
path_rename: function(fd0, path0, path_len0, fd1, path1, path_len1) {
let host_path0 = copyin_bytes(path0, path_len0);
let host_path1 = copyin_bytes(path1, path_len1);
let ret = ___wasi_path_rename(fd, host_path0, path_len0, fd1, host_path1, path1_len);
_free(host_path1);
_free(host_path0);
return ret;
},
fd_filestat_get: function(fd, buf) {
let host_buf = _malloc(56); // sizeof __wasi_filestat_t
let ret = ___wasi_fd_filestat_get(host_buf);
copyout_bytes(buf, host_buf, 56);
return ret;
},
fd_filestat_set_size: function(fd, size) {
return ___wasi_fd_filestat_set_size(fd, size);
},
fd_filestat_set_times: function(fd, st_atim, st_mtim, fstflags) {
return ___wasi_fd_filestat_set_times(fd, st_atim, st_mtim, fstflags);
},
path_filestat_get: function(fd, path, path_len, buf) {
let host_path = copyin_bytes(path, path_len);
let host_buf = _malloc(56); // sizeof __wasi_filestat_t
let ret = ___wasi_path_filestat_get(fd, host_path, path_len, host_buf);
copyout_bytes(buf, host_buf, 56);
_free(host_path);
return ret;
},
path_filestat_set_times: function(fd, path, path_len, st_atim, st_mtim, flags) {
let host_path = copyin_bytes(path, path_len);
let ret = ___wasi_path_filestat_set_times(fd, host_path, st_atim, st_mtim, fstflags);
_free(host_path);
return ret;
},
path_symlink: function(path0, path_len0, fd, path1, path_len1) {
let host_path0 = copyin_bytes(path0, path0_len);
let host_path1 = copyin_bytes(path1, path1_len);
let ret = ___wasi_path_symlink(host_path0, path_len0, fd, host_path1, path_len1);
_free(host_path1);
_free(host_path0);
return ret;
},
path_unlink_file: function(fd, path, path_len, flags) {
let host_path = copyin_bytes(path, path_len);
let ret = ___wasi_path_unlink_file(fd, host_path, path_len, flags);
_free(host_path);
return ret;
},
path_remove_directory: function(fd, path, path_len, flags) {
let host_path = copyin_bytes(path, path_len);
let ret = ___wasi_path_remove_directory(fd, host_path, path_len, flags);
_free(host_path);
return ret;
},
poll_oneoff: function(in_, out, nsubscriptions, nevents) {
let host_in = copyin_bytes(in_, nsubscriptions * 56); // sizeof __wasi_subscription_t
let host_out = _malloc(nsubscriptions * 32); // sizeof __wasi_event_t
let host_nevents = _malloc(4);
let ret = ___wasi_poll_oneoff(host_in, host_out, host_nevents);
copyout_bytes(out, host_out, nsubscriptions * 32);
copyout_i32(nevents, host_nevents);
_free(host_in);
return ret;
},
proc_exit: function(rval) {
let message;
if (rval == 0) {
message = "success";
} else {
message = "error code " + rval;
}
throw new WASIExit(rval, message);
},
proc_raise: function(sig) {
if (sig == 18 || // SIGSTOP
sig == 19 || // SIGTSTP
sig == 20 || // SIGTTIN
sig == 21 || // SIGTTOU
sig == 22 || // SIGURG
sig == 16 || // SIGCHLD
sig == 13) // SIGPIPE
{
return 0;
}
let message = "raised signal " + sig;
throw new WASIExit(128 + sig, message);
},
random_get: function(buf, buf_len) {
let host_buf = _malloc(buf_len);
let ret = ___wasi_random_get(host_buf, buf_len);
copyout_bytes(buf, host_buf, buf_len);
return ret;
},
sched_yield: function() {
return ___wasi_sched_yield();
},
sock_recv: function(sock, ri_data, ri_data_len, ri_flags, ro_datalen, ro_flags) {
let host_ri_data = translate_iovs(ri_data, ri_data_len);
let host_ro_datalen = _malloc(4);
let ret = ___wasi_sock_recv(sock, host_ri_data, ri_data_len, ri_flags, host_ro_data, ro_flags);
copyout_i32(ro_datalen, host_ro_datalen);
free_iovs(host_ri_data, ri_data_len, ri_data);
return ret;
},
sock_send: function(sock, si_data, si_data_len, si_flags, so_datalen) {
let host_si_data = translate_ciovs(si_data, si_data_len);
let host_so_datalen = _malloc(4);
let ret = ___wasi_sock_send(sock, host_si_data, si_data_len, si_flags, host_so_datalen);
copyout_i32(so_datalen, host_so_datalen);
free_ciovs(host_si_data, si_data_len);
return ret;
},
sock_shutdown: function(sock, how) {
return ___wasi_sock_shutdown(sock, how);
}
};

8
wasmtime-wasi-c/sandboxed-system-primitives/CMakeLists.txt Normal file
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@@ -0,0 +1,8 @@
cmake_minimum_required(VERSION 3.0)
project(SandboxedSystemPrimitives C)
include_directories(include)
add_library(SandboxedSystemPrimitives STATIC src/posix.c src/random.c src/str.c)
install(TARGETS SandboxedSystemPrimitives DESTINATION .)

7
wasmtime-wasi-c/sandboxed-system-primitives/LICENSE Normal file
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@@ -0,0 +1,7 @@
Please see the LICENSE file in each top-level directory for the terms applicable to that directory and its relative sub-directories.
The relevant directories and licenses are:
src/ - BSD-2-Clause; see src/LICENSE for details
include/ - CC0 1.0 Universal (CC0 1.0) Public Domain Dedication
polyfill/clang/ - MIT; see the header of polyfill/clang/stdatomic.h for details

9
wasmtime-wasi-c/sandboxed-system-primitives/README.md Normal file
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@@ -0,0 +1,9 @@
This repository contains adapted forms of the CloudABI project's "libemulator"
library, which includes implementations the CloudABI system calls using
standard native platform support. See the README.md and LICENSE files in
the individual subdirectories for details.
src/ - cloudabi-utils' libemulator; see src/README.md for details
include/ - wasi headers
This is currently an experimental prototype.

121
wasmtime-wasi-c/sandboxed-system-primitives/include/LICENSE Normal file
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@@ -0,0 +1,121 @@
Creative Commons Legal Code
CC0 1.0 Universal
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866
wasmtime-wasi-c/sandboxed-system-primitives/include/wasmtime_ssp.h Normal file
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@@ -0,0 +1,866 @@
/*
* Part of the Wasmtime Project, under the Apache License v2.0 with LLVM Exceptions.
* See https://github.com/CraneStation/wasmtime/blob/master/LICENSE for license information.
*
* This file declares an interface similar to WASI, but augmented to expose
* some implementation details such as the curfds arguments that we pass
* around to avoid storing them in TLS.
*/
#ifndef WASMTIME_SSP_H
#define WASMTIME_SSP_H
#include <stddef.h>
#include <stdint.h>
_Static_assert(_Alignof(int8_t) == 1, "non-wasi data layout");
_Static_assert(_Alignof(uint8_t) == 1, "non-wasi data layout");
_Static_assert(_Alignof(int16_t) == 2, "non-wasi data layout");
_Static_assert(_Alignof(uint16_t) == 2, "non-wasi data layout");
_Static_assert(_Alignof(int32_t) == 4, "non-wasi data layout");
_Static_assert(_Alignof(uint32_t) == 4, "non-wasi data layout");
_Static_assert(_Alignof(int64_t) == 8, "non-wasi data layout");
_Static_assert(_Alignof(uint64_t) == 8, "non-wasi data layout");
#ifdef __cplusplus
extern "C" {
#endif
typedef uint8_t __wasi_advice_t;
#define __WASI_ADVICE_NORMAL (0)
#define __WASI_ADVICE_SEQUENTIAL (1)
#define __WASI_ADVICE_RANDOM (2)
#define __WASI_ADVICE_WILLNEED (3)
#define __WASI_ADVICE_DONTNEED (4)
#define __WASI_ADVICE_NOREUSE (5)
typedef uint32_t __wasi_clockid_t;
#define __WASI_CLOCK_REALTIME (0)
#define __WASI_CLOCK_MONOTONIC (1)
#define __WASI_CLOCK_PROCESS_CPUTIME_ID (2)
#define __WASI_CLOCK_THREAD_CPUTIME_ID (3)
typedef uint64_t __wasi_device_t;
typedef uint64_t __wasi_dircookie_t;
#define __WASI_DIRCOOKIE_START (0)
typedef uint16_t __wasi_errno_t;
#define __WASI_ESUCCESS (0)
#define __WASI_E2BIG (1)
#define __WASI_EACCES (2)
#define __WASI_EADDRINUSE (3)
#define __WASI_EADDRNOTAVAIL (4)
#define __WASI_EAFNOSUPPORT (5)
#define __WASI_EAGAIN (6)
#define __WASI_EALREADY (7)
#define __WASI_EBADF (8)
#define __WASI_EBADMSG (9)
#define __WASI_EBUSY (10)
#define __WASI_ECANCELED (11)
#define __WASI_ECHILD (12)
#define __WASI_ECONNABORTED (13)
#define __WASI_ECONNREFUSED (14)
#define __WASI_ECONNRESET (15)
#define __WASI_EDEADLK (16)
#define __WASI_EDESTADDRREQ (17)
#define __WASI_EDOM (18)
#define __WASI_EDQUOT (19)
#define __WASI_EEXIST (20)
#define __WASI_EFAULT (21)
#define __WASI_EFBIG (22)
#define __WASI_EHOSTUNREACH (23)
#define __WASI_EIDRM (24)
#define __WASI_EILSEQ (25)
#define __WASI_EINPROGRESS (26)
#define __WASI_EINTR (27)
#define __WASI_EINVAL (28)
#define __WASI_EIO (29)
#define __WASI_EISCONN (30)
#define __WASI_EISDIR (31)
#define __WASI_ELOOP (32)
#define __WASI_EMFILE (33)
#define __WASI_EMLINK (34)
#define __WASI_EMSGSIZE (35)
#define __WASI_EMULTIHOP (36)
#define __WASI_ENAMETOOLONG (37)
#define __WASI_ENETDOWN (38)
#define __WASI_ENETRESET (39)
#define __WASI_ENETUNREACH (40)
#define __WASI_ENFILE (41)
#define __WASI_ENOBUFS (42)
#define __WASI_ENODEV (43)
#define __WASI_ENOENT (44)
#define __WASI_ENOEXEC (45)
#define __WASI_ENOLCK (46)
#define __WASI_ENOLINK (47)
#define __WASI_ENOMEM (48)
#define __WASI_ENOMSG (49)
#define __WASI_ENOPROTOOPT (50)
#define __WASI_ENOSPC (51)
#define __WASI_ENOSYS (52)
#define __WASI_ENOTCONN (53)
#define __WASI_ENOTDIR (54)
#define __WASI_ENOTEMPTY (55)
#define __WASI_ENOTRECOVERABLE (56)
#define __WASI_ENOTSOCK (57)
#define __WASI_ENOTSUP (58)
#define __WASI_ENOTTY (59)
#define __WASI_ENXIO (60)
#define __WASI_EOVERFLOW (61)
#define __WASI_EOWNERDEAD (62)
#define __WASI_EPERM (63)
#define __WASI_EPIPE (64)
#define __WASI_EPROTO (65)
#define __WASI_EPROTONOSUPPORT (66)
#define __WASI_EPROTOTYPE (67)
#define __WASI_ERANGE (68)
#define __WASI_EROFS (69)
#define __WASI_ESPIPE (70)
#define __WASI_ESRCH (71)
#define __WASI_ESTALE (72)
#define __WASI_ETIMEDOUT (73)
#define __WASI_ETXTBSY (74)
#define __WASI_EXDEV (75)
#define __WASI_ENOTCAPABLE (76)
typedef uint16_t __wasi_eventrwflags_t;
#define __WASI_EVENT_FD_READWRITE_HANGUP (0x0001)
typedef uint8_t __wasi_eventtype_t;
#define __WASI_EVENTTYPE_CLOCK (0)
#define __WASI_EVENTTYPE_FD_READ (1)
#define __WASI_EVENTTYPE_FD_WRITE (2)
typedef uint32_t __wasi_exitcode_t;
typedef uint32_t __wasi_fd_t;
typedef uint16_t __wasi_fdflags_t;
#define __WASI_FDFLAG_APPEND (0x0001)
#define __WASI_FDFLAG_DSYNC (0x0002)
#define __WASI_FDFLAG_NONBLOCK (0x0004)
#define __WASI_FDFLAG_RSYNC (0x0008)
#define __WASI_FDFLAG_SYNC (0x0010)
typedef int64_t __wasi_filedelta_t;
typedef uint64_t __wasi_filesize_t;
typedef uint8_t __wasi_filetype_t;
#define __WASI_FILETYPE_UNKNOWN (0)
#define __WASI_FILETYPE_BLOCK_DEVICE (1)
#define __WASI_FILETYPE_CHARACTER_DEVICE (2)
#define __WASI_FILETYPE_DIRECTORY (3)
#define __WASI_FILETYPE_REGULAR_FILE (4)
#define __WASI_FILETYPE_SOCKET_DGRAM (5)
#define __WASI_FILETYPE_SOCKET_STREAM (6)
#define __WASI_FILETYPE_SYMBOLIC_LINK (7)
typedef uint16_t __wasi_fstflags_t;
#define __WASI_FILESTAT_SET_ATIM (0x0001)
#define __WASI_FILESTAT_SET_ATIM_NOW (0x0002)
#define __WASI_FILESTAT_SET_MTIM (0x0004)
#define __WASI_FILESTAT_SET_MTIM_NOW (0x0008)
typedef uint64_t __wasi_inode_t;
typedef uint32_t __wasi_linkcount_t;
typedef uint32_t __wasi_lookupflags_t;
#define __WASI_LOOKUP_SYMLINK_FOLLOW (0x00000001)
typedef uint16_t __wasi_oflags_t;
#define __WASI_O_CREAT (0x0001)
#define __WASI_O_DIRECTORY (0x0002)
#define __WASI_O_EXCL (0x0004)
#define __WASI_O_TRUNC (0x0008)
typedef uint16_t __wasi_riflags_t;
#define __WASI_SOCK_RECV_PEEK (0x0001)
#define __WASI_SOCK_RECV_WAITALL (0x0002)
typedef uint64_t __wasi_rights_t;
#define __WASI_RIGHT_FD_DATASYNC (0x0000000000000001)
#define __WASI_RIGHT_FD_READ (0x0000000000000002)
#define __WASI_RIGHT_FD_SEEK (0x0000000000000004)
#define __WASI_RIGHT_FD_FDSTAT_SET_FLAGS (0x0000000000000008)
#define __WASI_RIGHT_FD_SYNC (0x0000000000000010)
#define __WASI_RIGHT_FD_TELL (0x0000000000000020)
#define __WASI_RIGHT_FD_WRITE (0x0000000000000040)
#define __WASI_RIGHT_FD_ADVISE (0x0000000000000080)
#define __WASI_RIGHT_FD_ALLOCATE (0x0000000000000100)
#define __WASI_RIGHT_PATH_CREATE_DIRECTORY (0x0000000000000200)
#define __WASI_RIGHT_PATH_CREATE_FILE (0x0000000000000400)
#define __WASI_RIGHT_PATH_LINK_SOURCE (0x0000000000000800)
#define __WASI_RIGHT_PATH_LINK_TARGET (0x0000000000001000)
#define __WASI_RIGHT_PATH_OPEN (0x0000000000002000)
#define __WASI_RIGHT_FD_READDIR (0x0000000000004000)
#define __WASI_RIGHT_PATH_READLINK (0x0000000000008000)
#define __WASI_RIGHT_PATH_RENAME_SOURCE (0x0000000000010000)
#define __WASI_RIGHT_PATH_RENAME_TARGET (0x0000000000020000)
#define __WASI_RIGHT_PATH_FILESTAT_GET (0x0000000000040000)
#define __WASI_RIGHT_PATH_FILESTAT_SET_SIZE (0x0000000000080000)
#define __WASI_RIGHT_PATH_FILESTAT_SET_TIMES (0x0000000000100000)
#define __WASI_RIGHT_FD_FILESTAT_GET (0x0000000000200000)
#define __WASI_RIGHT_FD_FILESTAT_SET_SIZE (0x0000000000400000)
#define __WASI_RIGHT_FD_FILESTAT_SET_TIMES (0x0000000000800000)
#define __WASI_RIGHT_PATH_SYMLINK (0x0000000001000000)
#define __WASI_RIGHT_PATH_REMOVE_DIRECTORY (0x0000000002000000)
#define __WASI_RIGHT_PATH_UNLINK_FILE (0x0000000004000000)
#define __WASI_RIGHT_POLL_FD_READWRITE (0x0000000008000000)
#define __WASI_RIGHT_SOCK_SHUTDOWN (0x0000000010000000)
typedef uint16_t __wasi_roflags_t;
#define __WASI_SOCK_RECV_DATA_TRUNCATED (0x0001)
typedef uint8_t __wasi_sdflags_t;
#define __WASI_SHUT_RD (0x01)
#define __WASI_SHUT_WR (0x02)
typedef uint16_t __wasi_siflags_t;
typedef uint8_t __wasi_signal_t;
// 0 is reserved; POSIX has special semantics for kill(pid, 0).
#define __WASI_SIGHUP (1)
#define __WASI_SIGINT (2)
#define __WASI_SIGQUIT (3)
#define __WASI_SIGILL (4)
#define __WASI_SIGTRAP (5)
#define __WASI_SIGABRT (6)
#define __WASI_SIGBUS (7)
#define __WASI_SIGFPE (8)
#define __WASI_SIGKILL (9)
#define __WASI_SIGUSR1 (10)
#define __WASI_SIGSEGV (11)
#define __WASI_SIGUSR2 (12)
#define __WASI_SIGPIPE (13)
#define __WASI_SIGALRM (14)
#define __WASI_SIGTERM (15)
#define __WASI_SIGCHLD (16)
#define __WASI_SIGCONT (17)
#define __WASI_SIGSTOP (18)
#define __WASI_SIGTSTP (19)
#define __WASI_SIGTTIN (20)
#define __WASI_SIGTTOU (21)
#define __WASI_SIGURG (22)
#define __WASI_SIGXCPU (23)
#define __WASI_SIGXFSZ (24)
#define __WASI_SIGVTALRM (25)
#define __WASI_SIGPROF (26)
#define __WASI_SIGWINCH (27)
#define __WASI_SIGPOLL (28)
#define __WASI_SIGPWR (29)
#define __WASI_SIGSYS (30)
typedef uint16_t __wasi_subclockflags_t;
#define __WASI_SUBSCRIPTION_CLOCK_ABSTIME (0x0001)
typedef uint64_t __wasi_timestamp_t;
typedef uint64_t __wasi_userdata_t;
typedef uint8_t __wasi_whence_t;
#define __WASI_WHENCE_CUR (0)
#define __WASI_WHENCE_END (1)
#define __WASI_WHENCE_SET (2)
typedef uint8_t __wasi_preopentype_t;
#define __WASI_PREOPENTYPE_DIR (0)
struct fd_table;
struct fd_prestats;
struct argv_environ_values;
typedef struct __wasi_dirent_t {
__wasi_dircookie_t d_next;
__wasi_inode_t d_ino;
uint32_t d_namlen;
__wasi_filetype_t d_type;
} __wasi_dirent_t;
_Static_assert(offsetof(__wasi_dirent_t, d_next) == 0, "non-wasi data layout");
_Static_assert(offsetof(__wasi_dirent_t, d_ino) == 8, "non-wasi data layout");
_Static_assert(offsetof(__wasi_dirent_t, d_namlen) == 16, "non-wasi data layout");
_Static_assert(offsetof(__wasi_dirent_t, d_type) == 20, "non-wasi data layout");
_Static_assert(sizeof(__wasi_dirent_t) == 24, "non-wasi data layout");
_Static_assert(_Alignof(__wasi_dirent_t) == 8, "non-wasi data layout");
typedef struct __wasi_event_t {
__wasi_userdata_t userdata;
__wasi_errno_t error;
__wasi_eventtype_t type;
union __wasi_event_u {
struct __wasi_event_u_fd_readwrite_t {
__wasi_filesize_t nbytes;
__wasi_eventrwflags_t flags;
} fd_readwrite;
} u;
} __wasi_event_t;
_Static_assert(offsetof(__wasi_event_t, userdata) == 0, "non-wasi data layout");
_Static_assert(offsetof(__wasi_event_t, error) == 8, "non-wasi data layout");
_Static_assert(offsetof(__wasi_event_t, type) == 10, "non-wasi data layout");
_Static_assert(
offsetof(__wasi_event_t, u.fd_readwrite.nbytes) == 16, "non-wasi data layout");
_Static_assert(
offsetof(__wasi_event_t, u.fd_readwrite.flags) == 24, "non-wasi data layout");
_Static_assert(sizeof(__wasi_event_t) == 32, "non-wasi data layout");
_Static_assert(_Alignof(__wasi_event_t) == 8, "non-wasi data layout");
typedef struct __wasi_prestat_t {
__wasi_preopentype_t pr_type;
union __wasi_prestat_u {
struct __wasi_prestat_u_dir_t {
size_t pr_name_len;
} dir;
} u;
} __wasi_prestat_t;
_Static_assert(offsetof(__wasi_prestat_t, pr_type) == 0, "non-wasi data layout");
_Static_assert(sizeof(void *) != 4 ||
offsetof(__wasi_prestat_t, u.dir.pr_name_len) == 4, "non-wasi data layout");
_Static_assert(sizeof(void *) != 8 ||
offsetof(__wasi_prestat_t, u.dir.pr_name_len) == 8, "non-wasi data layout");
_Static_assert(sizeof(void *) != 4 ||
sizeof(__wasi_prestat_t) == 8, "non-wasi data layout");
_Static_assert(sizeof(void *) != 8 ||
sizeof(__wasi_prestat_t) == 16, "non-wasi data layout");
_Static_assert(sizeof(void *) != 4 ||
_Alignof(__wasi_prestat_t) == 4, "non-wasi data layout");
_Static_assert(sizeof(void *) != 8 ||
_Alignof(__wasi_prestat_t) == 8, "non-wasi data layout");
typedef struct __wasi_fdstat_t {
__wasi_filetype_t fs_filetype;
__wasi_fdflags_t fs_flags;
__wasi_rights_t fs_rights_base;
__wasi_rights_t fs_rights_inheriting;
} __wasi_fdstat_t;
_Static_assert(
offsetof(__wasi_fdstat_t, fs_filetype) == 0, "non-wasi data layout");
_Static_assert(offsetof(__wasi_fdstat_t, fs_flags) == 2, "non-wasi data layout");
_Static_assert(
offsetof(__wasi_fdstat_t, fs_rights_base) == 8, "non-wasi data layout");
_Static_assert(
offsetof(__wasi_fdstat_t, fs_rights_inheriting) == 16,
"non-wasi data layout");
_Static_assert(sizeof(__wasi_fdstat_t) == 24, "non-wasi data layout");
_Static_assert(_Alignof(__wasi_fdstat_t) == 8, "non-wasi data layout");
typedef struct __wasi_filestat_t {
__wasi_device_t st_dev;
__wasi_inode_t st_ino;
__wasi_filetype_t st_filetype;
__wasi_linkcount_t st_nlink;
__wasi_filesize_t st_size;
__wasi_timestamp_t st_atim;
__wasi_timestamp_t st_mtim;
__wasi_timestamp_t st_ctim;
} __wasi_filestat_t;
_Static_assert(offsetof(__wasi_filestat_t, st_dev) == 0, "non-wasi data layout");
_Static_assert(offsetof(__wasi_filestat_t, st_ino) == 8, "non-wasi data layout");
_Static_assert(
offsetof(__wasi_filestat_t, st_filetype) == 16, "non-wasi data layout");
_Static_assert(
offsetof(__wasi_filestat_t, st_nlink) == 20, "non-wasi data layout");
_Static_assert(
offsetof(__wasi_filestat_t, st_size) == 24, "non-wasi data layout");
_Static_assert(
offsetof(__wasi_filestat_t, st_atim) == 32, "non-wasi data layout");
_Static_assert(
offsetof(__wasi_filestat_t, st_mtim) == 40, "non-wasi data layout");
_Static_assert(
offsetof(__wasi_filestat_t, st_ctim) == 48, "non-wasi data layout");
_Static_assert(sizeof(__wasi_filestat_t) == 56, "non-wasi data layout");
_Static_assert(_Alignof(__wasi_filestat_t) == 8, "non-wasi data layout");
typedef struct __wasi_ciovec_t {
const void *buf;
size_t buf_len;
} __wasi_ciovec_t;
_Static_assert(offsetof(__wasi_ciovec_t, buf) == 0, "non-wasi data layout");
_Static_assert(sizeof(void *) != 4 ||
offsetof(__wasi_ciovec_t, buf_len) == 4, "non-wasi data layout");
_Static_assert(sizeof(void *) != 8 ||
offsetof(__wasi_ciovec_t, buf_len) == 8, "non-wasi data layout");
_Static_assert(sizeof(void *) != 4 ||
sizeof(__wasi_ciovec_t) == 8, "non-wasi data layout");
_Static_assert(sizeof(void *) != 8 ||
sizeof(__wasi_ciovec_t) == 16, "non-wasi data layout");
_Static_assert(sizeof(void *) != 4 ||
_Alignof(__wasi_ciovec_t) == 4, "non-wasi data layout");
_Static_assert(sizeof(void *) != 8 ||
_Alignof(__wasi_ciovec_t) == 8, "non-wasi data layout");
typedef struct __wasi_iovec_t {
void *buf;
size_t buf_len;
} __wasi_iovec_t;
_Static_assert(offsetof(__wasi_iovec_t, buf) == 0, "non-wasi data layout");
_Static_assert(sizeof(void *) != 4 ||
offsetof(__wasi_iovec_t, buf_len) == 4, "non-wasi data layout");
_Static_assert(sizeof(void *) != 8 ||
offsetof(__wasi_iovec_t, buf_len) == 8, "non-wasi data layout");
_Static_assert(sizeof(void *) != 4 ||
sizeof(__wasi_iovec_t) == 8, "non-wasi data layout");
_Static_assert(sizeof(void *) != 8 ||
sizeof(__wasi_iovec_t) == 16, "non-wasi data layout");
_Static_assert(sizeof(void *) != 4 ||
_Alignof(__wasi_iovec_t) == 4, "non-wasi data layout");
_Static_assert(sizeof(void *) != 8 ||
_Alignof(__wasi_iovec_t) == 8, "non-wasi data layout");
typedef struct __wasi_subscription_t {
__wasi_userdata_t userdata;
__wasi_eventtype_t type;
union __wasi_subscription_u {
struct __wasi_subscription_u_clock_t {
__wasi_userdata_t identifier;
__wasi_clockid_t clock_id;
__wasi_timestamp_t timeout;
__wasi_timestamp_t precision;
__wasi_subclockflags_t flags;
} clock;
struct __wasi_subscription_u_fd_readwrite_t {
__wasi_fd_t fd;
} fd_readwrite;
} u;
} __wasi_subscription_t;
_Static_assert(
offsetof(__wasi_subscription_t, userdata) == 0, "non-wasi data layout");
_Static_assert(
offsetof(__wasi_subscription_t, type) == 8, "non-wasi data layout");
_Static_assert(
offsetof(__wasi_subscription_t, u.clock.identifier) == 16,
"non-wasi data layout");
_Static_assert(
offsetof(__wasi_subscription_t, u.clock.clock_id) == 24,
"non-wasi data layout");
_Static_assert(
offsetof(__wasi_subscription_t, u.clock.timeout) == 32, "non-wasi data layout");
_Static_assert(
offsetof(__wasi_subscription_t, u.clock.precision) == 40,
"non-wasi data layout");
_Static_assert(
offsetof(__wasi_subscription_t, u.clock.flags) == 48, "non-wasi data layout");
_Static_assert(
offsetof(__wasi_subscription_t, u.fd_readwrite.fd) == 16,
"non-wasi data layout");
_Static_assert(sizeof(__wasi_subscription_t) == 56, "non-wasi data layout");
_Static_assert(_Alignof(__wasi_subscription_t) == 8, "non-wasi data layout");
#if defined(WASMTIME_SSP_WASI_API)
#define WASMTIME_SSP_SYSCALL_NAME(name) \
asm("__wasi_" #name)
#else
#define WASMTIME_SSP_SYSCALL_NAME(name)
#endif
__wasi_errno_t wasmtime_ssp_args_get(
#if !defined(WASMTIME_SSP_STATIC_CURFDS)
struct argv_environ_values *arg_environ,
#endif
char **argv,
char *argv_buf
) WASMTIME_SSP_SYSCALL_NAME(args_get) __attribute__((__warn_unused_result__));
__wasi_errno_t wasmtime_ssp_args_sizes_get(
#if !defined(WASMTIME_SSP_STATIC_CURFDS)
struct argv_environ_values *arg_environ,
#endif
size_t *argc,
size_t *argv_buf_size
) WASMTIME_SSP_SYSCALL_NAME(args_sizes_get) __attribute__((__warn_unused_result__));
__wasi_errno_t wasmtime_ssp_clock_res_get(
__wasi_clockid_t clock_id,
__wasi_timestamp_t *resolution
) WASMTIME_SSP_SYSCALL_NAME(clock_res_get) __attribute__((__warn_unused_result__));
__wasi_errno_t wasmtime_ssp_clock_time_get(
__wasi_clockid_t clock_id,
__wasi_timestamp_t precision,
__wasi_timestamp_t *time
) WASMTIME_SSP_SYSCALL_NAME(clock_time_get) __attribute__((__warn_unused_result__));
__wasi_errno_t wasmtime_ssp_environ_get(
#if !defined(WASMTIME_SSP_STATIC_CURFDS)
struct argv_environ_values *arg_environ,
#endif
char **environ,
char *environ_buf
) WASMTIME_SSP_SYSCALL_NAME(environ_get) __attribute__((__warn_unused_result__));
__wasi_errno_t wasmtime_ssp_environ_sizes_get(
#if !defined(WASMTIME_SSP_STATIC_CURFDS)
struct argv_environ_values *arg_environ,
#endif
size_t *environ_count,
size_t *environ_buf_size
) WASMTIME_SSP_SYSCALL_NAME(environ_sizes_get) __attribute__((__warn_unused_result__));
__wasi_errno_t wasmtime_ssp_fd_prestat_get(
#if !defined(WASMTIME_SSP_STATIC_CURFDS)
struct fd_prestats *prestats,
#endif
__wasi_fd_t fd,
__wasi_prestat_t *buf
) WASMTIME_SSP_SYSCALL_NAME(fd_prestat_get) __attribute__((__warn_unused_result__));
__wasi_errno_t wasmtime_ssp_fd_prestat_dir_name(
#if !defined(WASMTIME_SSP_STATIC_CURFDS)
struct fd_prestats *prestats,
#endif
__wasi_fd_t fd,
char *path,
size_t path_len
) WASMTIME_SSP_SYSCALL_NAME(fd_prestat_dir_name) __attribute__((__warn_unused_result__));
__wasi_errno_t wasmtime_ssp_fd_close(
#if !defined(WASMTIME_SSP_STATIC_CURFDS)
struct fd_table *curfds,
struct fd_prestats *prestats,
#endif
__wasi_fd_t fd
) WASMTIME_SSP_SYSCALL_NAME(fd_close) __attribute__((__warn_unused_result__));
__wasi_errno_t wasmtime_ssp_fd_datasync(
#if !defined(WASMTIME_SSP_STATIC_CURFDS)
struct fd_table *curfds,
#endif
__wasi_fd_t fd
) WASMTIME_SSP_SYSCALL_NAME(fd_datasync) __attribute__((__warn_unused_result__));
__wasi_errno_t wasmtime_ssp_fd_pread(
#if !defined(WASMTIME_SSP_STATIC_CURFDS)
struct fd_table *curfds,
#endif
__wasi_fd_t fd,
const __wasi_iovec_t *iovs,
size_t iovs_len,
__wasi_filesize_t offset,
size_t *nread
) WASMTIME_SSP_SYSCALL_NAME(fd_pread) __attribute__((__warn_unused_result__));
__wasi_errno_t wasmtime_ssp_fd_pwrite(
#if !defined(WASMTIME_SSP_STATIC_CURFDS)
struct fd_table *curfds,
#endif
__wasi_fd_t fd,
const __wasi_ciovec_t *iovs,
size_t iovs_len,
__wasi_filesize_t offset,
size_t *nwritten
) WASMTIME_SSP_SYSCALL_NAME(fd_pwrite) __attribute__((__warn_unused_result__));
__wasi_errno_t wasmtime_ssp_fd_read(
#if !defined(WASMTIME_SSP_STATIC_CURFDS)
struct fd_table *curfds,
#endif
__wasi_fd_t fd,
const __wasi_iovec_t *iovs,
size_t iovs_len,
size_t *nread
) WASMTIME_SSP_SYSCALL_NAME(fd_read) __attribute__((__warn_unused_result__));
__wasi_errno_t wasmtime_ssp_fd_renumber(
#if !defined(WASMTIME_SSP_STATIC_CURFDS)
struct fd_table *curfds,
struct fd_prestats *prestats,
#endif
__wasi_fd_t from,
__wasi_fd_t to
) WASMTIME_SSP_SYSCALL_NAME(fd_renumber) __attribute__((__warn_unused_result__));
__wasi_errno_t wasmtime_ssp_fd_seek(
#if !defined(WASMTIME_SSP_STATIC_CURFDS)
struct fd_table *curfds,
#endif
__wasi_fd_t fd,
__wasi_filedelta_t offset,
__wasi_whence_t whence,
__wasi_filesize_t *newoffset
) WASMTIME_SSP_SYSCALL_NAME(fd_seek) __attribute__((__warn_unused_result__));
__wasi_errno_t wasmtime_ssp_fd_tell(
#if !defined(WASMTIME_SSP_STATIC_CURFDS)
struct fd_table *curfds,
#endif
__wasi_fd_t fd,
__wasi_filesize_t *newoffset
) WASMTIME_SSP_SYSCALL_NAME(fd_tell) __attribute__((__warn_unused_result__));
__wasi_errno_t wasmtime_ssp_fd_fdstat_get(
#if !defined(WASMTIME_SSP_STATIC_CURFDS)
struct fd_table *curfds,
#endif
__wasi_fd_t fd,
__wasi_fdstat_t *buf
) WASMTIME_SSP_SYSCALL_NAME(fd_fdstat_get) __attribute__((__warn_unused_result__));
__wasi_errno_t wasmtime_ssp_fd_fdstat_set_flags(
#if !defined(WASMTIME_SSP_STATIC_CURFDS)
struct fd_table *curfds,
#endif
__wasi_fd_t fd,
__wasi_fdflags_t flags
) WASMTIME_SSP_SYSCALL_NAME(fd_fdstat_set_flags) __attribute__((__warn_unused_result__));
__wasi_errno_t wasmtime_ssp_fd_fdstat_set_rights(
#if !defined(WASMTIME_SSP_STATIC_CURFDS)
struct fd_table *curfds,
#endif
__wasi_fd_t fd,
__wasi_rights_t fs_rights_base,
__wasi_rights_t fs_rights_inheriting
) WASMTIME_SSP_SYSCALL_NAME(fd_fdstat_set_rights) __attribute__((__warn_unused_result__));
__wasi_errno_t wasmtime_ssp_fd_sync(
#if !defined(WASMTIME_SSP_STATIC_CURFDS)
struct fd_table *curfds,
#endif
__wasi_fd_t fd
) WASMTIME_SSP_SYSCALL_NAME(fd_sync) __attribute__((__warn_unused_result__));
__wasi_errno_t wasmtime_ssp_fd_write(
#if !defined(WASMTIME_SSP_STATIC_CURFDS)
struct fd_table *curfds,
#endif
__wasi_fd_t fd,
const __wasi_ciovec_t *iovs,
size_t iovs_len,
size_t *nwritten
) WASMTIME_SSP_SYSCALL_NAME(fd_write) __attribute__((__warn_unused_result__));
__wasi_errno_t wasmtime_ssp_fd_advise(
#if !defined(WASMTIME_SSP_STATIC_CURFDS)
struct fd_table *curfds,
#endif
__wasi_fd_t fd,
__wasi_filesize_t offset,
__wasi_filesize_t len,
__wasi_advice_t advice
) WASMTIME_SSP_SYSCALL_NAME(fd_advise) __attribute__((__warn_unused_result__));
__wasi_errno_t wasmtime_ssp_fd_allocate(
#if !defined(WASMTIME_SSP_STATIC_CURFDS)
struct fd_table *curfds,
#endif
__wasi_fd_t fd,
__wasi_filesize_t offset,
__wasi_filesize_t len
) WASMTIME_SSP_SYSCALL_NAME(fd_allocate) __attribute__((__warn_unused_result__));
__wasi_errno_t wasmtime_ssp_path_create_directory(
#if !defined(WASMTIME_SSP_STATIC_CURFDS)
struct fd_table *curfds,
#endif
__wasi_fd_t fd,
const char *path,
size_t path_len
) WASMTIME_SSP_SYSCALL_NAME(path_create_directory) __attribute__((__warn_unused_result__));
__wasi_errno_t wasmtime_ssp_path_link(
#if !defined(WASMTIME_SSP_STATIC_CURFDS)
struct fd_table *curfds,
#endif
__wasi_fd_t old_fd,
__wasi_lookupflags_t old_flags,
const char *old_path,
size_t old_path_len,
__wasi_fd_t new_fd,
const char *new_path,
size_t new_path_len
) WASMTIME_SSP_SYSCALL_NAME(path_link) __attribute__((__warn_unused_result__));
__wasi_errno_t wasmtime_ssp_path_open(
#if !defined(WASMTIME_SSP_STATIC_CURFDS)
struct fd_table *curfds,
#endif
__wasi_fd_t dirfd,
__wasi_lookupflags_t dirflags,
const char *path,
size_t path_len,
__wasi_oflags_t oflags,
__wasi_rights_t fs_rights_base,
__wasi_rights_t fs_rights_inheriting,
__wasi_fdflags_t fs_flags,
__wasi_fd_t *fd
) WASMTIME_SSP_SYSCALL_NAME(path_open) __attribute__((__warn_unused_result__));
__wasi_errno_t wasmtime_ssp_fd_readdir(
#if !defined(WASMTIME_SSP_STATIC_CURFDS)
struct fd_table *curfds,
#endif
__wasi_fd_t fd,
void *buf,
size_t buf_len,
__wasi_dircookie_t cookie,
size_t *bufused
) WASMTIME_SSP_SYSCALL_NAME(fd_readdir) __attribute__((__warn_unused_result__));
__wasi_errno_t wasmtime_ssp_path_readlink(
#if !defined(WASMTIME_SSP_STATIC_CURFDS)
struct fd_table *curfds,
#endif
__wasi_fd_t fd,
const char *path,
size_t path_len,
char *buf,
size_t buf_len,
size_t *bufused
) WASMTIME_SSP_SYSCALL_NAME(path_readlink) __attribute__((__warn_unused_result__));
__wasi_errno_t wasmtime_ssp_path_rename(
#if !defined(WASMTIME_SSP_STATIC_CURFDS)
struct fd_table *curfds,
#endif
__wasi_fd_t old_fd,
const char *old_path,
size_t old_path_len,
__wasi_fd_t new_fd,
const char *new_path,
size_t new_path_len
) WASMTIME_SSP_SYSCALL_NAME(path_rename) __attribute__((__warn_unused_result__));
__wasi_errno_t wasmtime_ssp_fd_filestat_get(
#if !defined(WASMTIME_SSP_STATIC_CURFDS)
struct fd_table *curfds,
#endif
__wasi_fd_t fd,
__wasi_filestat_t *buf
) WASMTIME_SSP_SYSCALL_NAME(fd_filestat_get) __attribute__((__warn_unused_result__));
__wasi_errno_t wasmtime_ssp_fd_filestat_set_times(
#if !defined(WASMTIME_SSP_STATIC_CURFDS)
struct fd_table *curfds,
#endif
__wasi_fd_t fd,
__wasi_timestamp_t st_atim,
__wasi_timestamp_t st_mtim,
__wasi_fstflags_t fstflags
) WASMTIME_SSP_SYSCALL_NAME(fd_filestat_set_times) __attribute__((__warn_unused_result__));
__wasi_errno_t wasmtime_ssp_fd_filestat_set_size(
#if !defined(WASMTIME_SSP_STATIC_CURFDS)
struct fd_table *curfds,
#endif
__wasi_fd_t fd,
__wasi_filesize_t st_size
) WASMTIME_SSP_SYSCALL_NAME(fd_filestat_set_size) __attribute__((__warn_unused_result__));
__wasi_errno_t wasmtime_ssp_path_filestat_get(
#if !defined(WASMTIME_SSP_STATIC_CURFDS)
struct fd_table *curfds,
#endif
__wasi_fd_t fd,
__wasi_lookupflags_t flags,
const char *path,
size_t path_len,
__wasi_filestat_t *buf
) WASMTIME_SSP_SYSCALL_NAME(path_filestat_get) __attribute__((__warn_unused_result__));
__wasi_errno_t wasmtime_ssp_path_filestat_set_times(
#if !defined(WASMTIME_SSP_STATIC_CURFDS)
struct fd_table *curfds,
#endif
__wasi_fd_t fd,
__wasi_lookupflags_t flags,
const char *path,
size_t path_len,
__wasi_timestamp_t st_atim,
__wasi_timestamp_t st_mtim,
__wasi_fstflags_t fstflags
) WASMTIME_SSP_SYSCALL_NAME(path_filestat_set_times) __attribute__((__warn_unused_result__));
__wasi_errno_t wasmtime_ssp_path_symlink(
#if !defined(WASMTIME_SSP_STATIC_CURFDS)
struct fd_table *curfds,
#endif
const char *old_path,
size_t old_path_len,
__wasi_fd_t fd,
const char *new_path,
size_t new_path_len
) WASMTIME_SSP_SYSCALL_NAME(path_symlink) __attribute__((__warn_unused_result__));
__wasi_errno_t wasmtime_ssp_path_unlink_file(
#if !defined(WASMTIME_SSP_STATIC_CURFDS)
struct fd_table *curfds,
#endif
__wasi_fd_t fd,
const char *path,
size_t path_len
) WASMTIME_SSP_SYSCALL_NAME(path_unlink_file) __attribute__((__warn_unused_result__));
__wasi_errno_t wasmtime_ssp_path_remove_directory(
#if !defined(WASMTIME_SSP_STATIC_CURFDS)
struct fd_table *curfds,
#endif
__wasi_fd_t fd,
const char *path,
size_t path_len
) WASMTIME_SSP_SYSCALL_NAME(path_remove_directory) __attribute__((__warn_unused_result__));
__wasi_errno_t wasmtime_ssp_poll_oneoff(
#if !defined(WASMTIME_SSP_STATIC_CURFDS)
struct fd_table *curfds,
#endif
const __wasi_subscription_t *in,
__wasi_event_t *out,
size_t nsubscriptions,
size_t *nevents
) WASMTIME_SSP_SYSCALL_NAME(poll_oneoff) __attribute__((__warn_unused_result__));
_Noreturn void wasmtime_ssp_proc_exit(
__wasi_exitcode_t rval
) WASMTIME_SSP_SYSCALL_NAME(proc_exit);
__wasi_errno_t wasmtime_ssp_proc_raise(
__wasi_signal_t sig
) WASMTIME_SSP_SYSCALL_NAME(proc_raise) __attribute__((__warn_unused_result__));
__wasi_errno_t wasmtime_ssp_random_get(
void *buf,
size_t buf_len
) WASMTIME_SSP_SYSCALL_NAME(random_get) __attribute__((__warn_unused_result__));
__wasi_errno_t wasmtime_ssp_sock_recv(
#if !defined(WASMTIME_SSP_STATIC_CURFDS)
struct fd_table *curfds,
#endif
__wasi_fd_t sock,
const __wasi_iovec_t *ri_data,
size_t ri_data_len,
__wasi_riflags_t ri_flags,
size_t *ro_datalen,
__wasi_roflags_t *ro_flags
) WASMTIME_SSP_SYSCALL_NAME(sock_recv) __attribute__((__warn_unused_result__));
__wasi_errno_t wasmtime_ssp_sock_send(
#if !defined(WASMTIME_SSP_STATIC_CURFDS)
struct fd_table *curfds,
#endif
__wasi_fd_t sock,
const __wasi_ciovec_t *si_data,
size_t si_data_len,
__wasi_siflags_t si_flags,
size_t *so_datalen
) WASMTIME_SSP_SYSCALL_NAME(sock_send) __attribute__((__warn_unused_result__));
__wasi_errno_t wasmtime_ssp_sock_shutdown(
#if !defined(WASMTIME_SSP_STATIC_CURFDS)
struct fd_table *curfds,
#endif
__wasi_fd_t sock,
__wasi_sdflags_t how
) WASMTIME_SSP_SYSCALL_NAME(sock_shutdown) __attribute__((__warn_unused_result__));
__wasi_errno_t wasmtime_ssp_sched_yield(void)
WASMTIME_SSP_SYSCALL_NAME(sched_yield) __attribute__((__warn_unused_result__));
#ifdef __cplusplus
}
#endif
#undef WASMTIME_SSP_SYSCALL_NAME
#endif

24
wasmtime-wasi-c/sandboxed-system-primitives/src/LICENSE Normal file
View File

@@ -0,0 +1,24 @@
All code is distributed under the following license:
Copyright (c) 2015 Nuxi, https://nuxi.nl/
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
1. Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
SUCH DAMAGE.

14
wasmtime-wasi-c/sandboxed-system-primitives/src/README.md Normal file
View File

@@ -0,0 +1,14 @@
This directory consists of selected files copied from the [libemulator]
directory in the [cloudabi-utils] repository, with minor modifications,
along with the accompanying LICENSE file from that repository.
The modifications are marked with `WASMTIME_*` preprocessor macros.
The files were copied at git revision
be1ce21e1dded9c0c0a6ebe144cbea01cf44a874
which is dated
Sun Jan 13 23:26:03 2019 +0100
.
[libemulator]: https://github.com/NuxiNL/cloudabi-utils/tree/master/src/libemulator
[cloudabi-utils]: https://github.com/NuxiNL/cloudabi-utils

100
wasmtime-wasi-c/sandboxed-system-primitives/src/config.h Normal file
View File

@@ -0,0 +1,100 @@
// Part of the Wasmtime Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://github.com/CraneStation/wasmtime/blob/master/LICENSE for license information.
//
// Significant parts of this file are derived from cloudabi-utils. See
// https://github.com/CraneStation/wasmtime/blob/master/lib/wasi/sandboxed-system-primitives/src/LICENSE
// for license information.
//
// The upstream file contains the following copyright notice:
//
// Copyright (c) 2016 Nuxi, https://nuxi.nl/
#ifndef CONFIG_H
#define CONFIG_H
#include <stdlib.h>
#if defined(__FreeBSD__) || defined(__APPLE__)
#define CONFIG_HAS_ARC4RANDOM_BUF 1
#else
#define CONFIG_HAS_ARC4RANDOM_BUF 0
#endif
// On Linux, prefer to use getrandom, though it isn't available in
// GLIBC before 2.25.
#if defined(__linux__) && \
(!defined(__GLIBC__) || \
__GLIBC__ > 2 || \
(__GLIBC__ == 2 && __GLIBC_MINOR__ >= 25))
#define CONFIG_HAS_GETRANDOM 1
#else
#define CONFIG_HAS_GETRANDOM 0
#endif
#if defined(__CloudABI__)
#define CONFIG_HAS_CAP_ENTER 1
#else
#define CONFIG_HAS_CAP_ENTER 0
#endif
#if !defined(__APPLE__) && !defined(__FreeBSD__) && !defined(__EMSCRIPTEN__)
#define CONFIG_HAS_CLOCK_NANOSLEEP 1
#else
#define CONFIG_HAS_CLOCK_NANOSLEEP 0
#endif
#if !defined(__APPLE__) && !defined(__FreeBSD__)
#define CONFIG_HAS_FDATASYNC 1
#else
#define CONFIG_HAS_FDATASYNC 0
#endif
#ifndef __CloudABI__
#define CONFIG_HAS_ISATTY 1
#else
#define CONFIG_HAS_ISATTY 0
#endif
#ifndef __APPLE__
#define CONFIG_HAS_POSIX_FALLOCATE 1
#else
#define CONFIG_HAS_POSIX_FALLOCATE 0
#endif
#ifndef __APPLE__
#define CONFIG_HAS_PREADV 1
#else
#define CONFIG_HAS_PREADV 0
#endif
#if defined(__APPLE__) || defined(__CloudABI__)
#define CONFIG_HAS_PTHREAD_COND_TIMEDWAIT_RELATIVE_NP 1
#else
#define CONFIG_HAS_PTHREAD_COND_TIMEDWAIT_RELATIVE_NP 0
#endif
#ifndef __APPLE__
#define CONFIG_HAS_PTHREAD_CONDATTR_SETCLOCK 1
#else
#define CONFIG_HAS_PTHREAD_CONDATTR_SETCLOCK 0
#endif
#ifndef __APPLE__
#define CONFIG_HAS_PWRITEV 1
#else
#define CONFIG_HAS_PWRITEV 0
#endif
#ifdef __APPLE__
#define st_atimespec st_atim
#define st_mtimespec st_mtim
#define st_ctimespec st_ctim
#endif
#ifdef __APPLE__
#define CONFIG_TLS_USE_GSBASE 1
#else
#define CONFIG_TLS_USE_GSBASE 0
#endif
#endif

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// Part of the Wasmtime Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://github.com/CraneStation/wasmtime/blob/master/LICENSE for license information.
//
// Significant parts of this file are derived from cloudabi-utils. See
// https://github.com/CraneStation/wasmtime/blob/master/lib/wasi/sandboxed-system-primitives/src/LICENSE
// for license information.
//
// The upstream file contains the following copyright notice:
//
// Copyright (c) 2016 Nuxi, https://nuxi.nl/
#ifndef LOCKING_H
#define LOCKING_H
#include "config.h"
#include <assert.h>
#include <errno.h>
#include <pthread.h>
#include <stdint.h>
#include <time.h>
#ifndef __has_extension
#define __has_extension(x) 0
#endif
#if __has_extension(c_thread_safety_attributes)
#define LOCK_ANNOTATE(x) __attribute__((x))
#else
#define LOCK_ANNOTATE(x)
#endif
// Lock annotation macros.
#define LOCKABLE LOCK_ANNOTATE(lockable)
#define LOCKS_EXCLUSIVE(...) LOCK_ANNOTATE(exclusive_lock_function(__VA_ARGS__))
#define LOCKS_SHARED(...) LOCK_ANNOTATE(shared_lock_function(__VA_ARGS__))
#define TRYLOCKS_EXCLUSIVE(...) \
LOCK_ANNOTATE(exclusive_trylock_function(__VA_ARGS__))
#define TRYLOCKS_SHARED(...) LOCK_ANNOTATE(shared_trylock_function(__VA_ARGS__))
#define UNLOCKS(...) LOCK_ANNOTATE(unlock_function(__VA_ARGS__))
#define REQUIRES_EXCLUSIVE(...) \
LOCK_ANNOTATE(exclusive_locks_required(__VA_ARGS__))
#define REQUIRES_SHARED(...) LOCK_ANNOTATE(shared_locks_required(__VA_ARGS__))
#define REQUIRES_UNLOCKED(...) LOCK_ANNOTATE(locks_excluded(__VA_ARGS__))
#define NO_LOCK_ANALYSIS LOCK_ANNOTATE(no_thread_safety_analysis)
// Mutex that uses the lock annotations.
struct LOCKABLE mutex {
pthread_mutex_t object;
};
#define MUTEX_INITIALIZER \
{ PTHREAD_MUTEX_INITIALIZER }
static inline void mutex_init(struct mutex *lock) REQUIRES_UNLOCKED(*lock) {
pthread_mutex_init(&lock->object, NULL);
}
static inline void mutex_destroy(struct mutex *lock) REQUIRES_UNLOCKED(*lock) {
pthread_mutex_destroy(&lock->object);
}
static inline void mutex_lock(struct mutex *lock)
LOCKS_EXCLUSIVE(*lock) NO_LOCK_ANALYSIS {
pthread_mutex_lock(&lock->object);
}
static inline void mutex_unlock(struct mutex *lock)
UNLOCKS(*lock) NO_LOCK_ANALYSIS {
pthread_mutex_unlock(&lock->object);
}
// Read-write lock that uses the lock annotations.
struct LOCKABLE rwlock {
pthread_rwlock_t object;
};
static inline void rwlock_init(struct rwlock *lock) REQUIRES_UNLOCKED(*lock) {
pthread_rwlock_init(&lock->object, NULL);
}
static inline void rwlock_rdlock(struct rwlock *lock)
LOCKS_SHARED(*lock) NO_LOCK_ANALYSIS {
pthread_rwlock_rdlock(&lock->object);
}
static inline void rwlock_wrlock(struct rwlock *lock)
LOCKS_EXCLUSIVE(*lock) NO_LOCK_ANALYSIS {
pthread_rwlock_wrlock(&lock->object);
}
static inline void rwlock_unlock(struct rwlock *lock)
UNLOCKS(*lock) NO_LOCK_ANALYSIS {
pthread_rwlock_unlock(&lock->object);
}
// Condition variable that uses the lock annotations.
struct LOCKABLE cond {
pthread_cond_t object;
#if !CONFIG_HAS_PTHREAD_CONDATTR_SETCLOCK || \
!CONFIG_HAS_PTHREAD_COND_TIMEDWAIT_RELATIVE_NP
clockid_t clock;
#endif
};
static inline void cond_init_monotonic(struct cond *cond) {
#if CONFIG_HAS_PTHREAD_CONDATTR_SETCLOCK
pthread_condattr_t attr;
pthread_condattr_init(&attr);
pthread_condattr_setclock(&attr, CLOCK_MONOTONIC);
pthread_cond_init(&cond->object, &attr);
pthread_condattr_destroy(&attr);
#else
pthread_cond_init(&cond->object, NULL);
#endif
#if !CONFIG_HAS_PTHREAD_CONDATTR_SETCLOCK || \
!CONFIG_HAS_PTHREAD_COND_TIMEDWAIT_RELATIVE_NP
cond->clock = CLOCK_MONOTONIC;
#endif
}
static inline void cond_init_realtime(struct cond *cond) {
pthread_cond_init(&cond->object, NULL);
#if !CONFIG_HAS_PTHREAD_CONDATTR_SETCLOCK || \
!CONFIG_HAS_PTHREAD_COND_TIMEDWAIT_RELATIVE_NP
cond->clock = CLOCK_REALTIME;
#endif
}
static inline void cond_destroy(struct cond *cond) {
pthread_cond_destroy(&cond->object);
}
static inline void cond_signal(struct cond *cond) {
pthread_cond_signal(&cond->object);
}
static inline bool cond_timedwait(struct cond *cond, struct mutex *lock,
uint64_t timeout, bool abstime)
REQUIRES_EXCLUSIVE(*lock) NO_LOCK_ANALYSIS {
struct timespec ts = {
.tv_sec = (time_t)(timeout / 1000000000),
.tv_nsec = (long)(timeout % 1000000000),
};
if (abstime) {
#if !CONFIG_HAS_PTHREAD_CONDATTR_SETCLOCK
// No native support for sleeping on monotonic clocks. Convert the
// timeout to a relative value and then to an absolute value for the
// realtime clock.
if (cond->clock != CLOCK_REALTIME) {
struct timespec ts_monotonic;
clock_gettime(cond->clock, &ts_monotonic);
ts.tv_sec -= ts_monotonic.tv_sec;
ts.tv_nsec -= ts_monotonic.tv_nsec;
if (ts.tv_nsec < 0) {
ts.tv_nsec += 1000000000;
--ts.tv_sec;
}
struct timespec ts_realtime;
clock_gettime(CLOCK_REALTIME, &ts_realtime);
ts.tv_sec += ts_realtime.tv_sec;
ts.tv_nsec += ts_realtime.tv_nsec;
if (ts.tv_nsec >= 1000000000) {
ts.tv_nsec -= 1000000000;
++ts.tv_sec;
}
}
#endif
} else {
#if CONFIG_HAS_PTHREAD_COND_TIMEDWAIT_RELATIVE_NP
// Implementation supports relative timeouts.
int ret =
pthread_cond_timedwait_relative_np(&cond->object, &lock->object, &ts);
assert((ret == 0 || ret == ETIMEDOUT) &&
"pthread_cond_timedwait_relative_np() failed");
return ret == ETIMEDOUT;
#else
// Convert to absolute timeout.
struct timespec ts_now;
#if CONFIG_HAS_PTHREAD_CONDATTR_SETCLOCK
clock_gettime(cond->clock, &ts_now);
#else
clock_gettime(CLOCK_REALTIME, &ts_now);
#endif
ts.tv_sec += ts_now.tv_sec;
ts.tv_nsec += ts_now.tv_nsec;
if (ts.tv_nsec >= 1000000000) {
ts.tv_nsec -= 1000000000;
++ts.tv_sec;
}
#endif
}
int ret = pthread_cond_timedwait(&cond->object, &lock->object, &ts);
assert((ret == 0 || ret == ETIMEDOUT) && "pthread_cond_timedwait() failed");
return ret == ETIMEDOUT;
}
static inline void cond_wait(struct cond *cond, struct mutex *lock)
REQUIRES_EXCLUSIVE(*lock) NO_LOCK_ANALYSIS {
pthread_cond_wait(&cond->object, &lock->object);
}
#endif

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// Part of the Wasmtime Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://github.com/CraneStation/wasmtime/blob/master/LICENSE for license information.
//
// Significant parts of this file are derived from cloudabi-utils. See
// https://github.com/CraneStation/wasmtime/blob/master/lib/wasi/sandboxed-system-primitives/src/LICENSE
// for license information.
//
// The upstream file contains the following copyright notice:
//
// Copyright (c) 2015 Nuxi, https://nuxi.nl/
#ifndef COMMON_LIMITS_H
#define COMMON_LIMITS_H
#include <limits.h>
#define NUMERIC_MIN(t) \
_Generic((t)0, char \
: CHAR_MIN, signed char \
: SCHAR_MIN, unsigned char : 0, short \
: SHRT_MIN, unsigned short : 0, int \
: INT_MIN, unsigned int : 0, long \
: LONG_MIN, unsigned long : 0, long long \
: LLONG_MIN, unsigned long long : 0, default \
: (void)0)
#define NUMERIC_MAX(t) \
_Generic((t)0, char \
: CHAR_MAX, signed char \
: SCHAR_MAX, unsigned char \
: UCHAR_MAX, short \
: SHRT_MAX, unsigned short \
: USHRT_MAX, int \
: INT_MAX, unsigned int \
: UINT_MAX, long \
: LONG_MAX, unsigned long \
: ULONG_MAX, long long \
: LLONG_MAX, unsigned long long \
: ULLONG_MAX, default \
: (void)0)
#endif

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// Part of the Wasmtime Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://github.com/CraneStation/wasmtime/blob/master/LICENSE for license information.
//
// Significant parts of this file are derived from cloudabi-utils. See
// https://github.com/CraneStation/wasmtime/blob/master/lib/wasi/sandboxed-system-primitives/src/LICENSE
// for license information.
//
// The upstream file contains the following copyright notice:
//
// Copyright (c) 2016-2018 Nuxi, https://nuxi.nl/
#ifndef POSIX_H
#define POSIX_H
#include <stdbool.h>
#include <stddef.h>
#include "locking.h"
struct fd_entry;
struct fd_prestat;
struct syscalls;
struct fd_table {
struct rwlock lock;
struct fd_entry *entries;
size_t size;
size_t used;
};
struct fd_prestats {
struct rwlock lock;
struct fd_prestat *prestats;
size_t size;
size_t used;
};
struct argv_environ_values {
size_t argc;
size_t argv_buf_size;
char **argv;
char *argv_buf;
size_t environ_count;
size_t environ_buf_size;
char **environ;
char *environ_buf;
};
void fd_table_init(struct fd_table *);
bool fd_table_insert_existing(struct fd_table *, __wasi_fd_t, int);
void fd_prestats_init(struct fd_prestats *);
bool fd_prestats_insert(struct fd_prestats *, const char *, __wasi_fd_t);
void argv_environ_init(struct argv_environ_values *,
const size_t *argv_offsets, size_t argv_offsets_len,
const char *argv_buf, size_t argv_buf_len,
const size_t *environ_offsets, size_t environ_offsets_len,
const char *environ_buf, size_t environ_buf_len);
#endif

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// Part of the Wasmtime Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://github.com/CraneStation/wasmtime/blob/master/LICENSE for license information.
//
// Significant parts of this file are derived from cloudabi-utils. See
// https://github.com/CraneStation/wasmtime/blob/master/lib/wasi/sandboxed-system-primitives/src/LICENSE
// for license information.
//
// The upstream file contains the following copyright notice:
//
// Copyright (c) 2016 Nuxi, https://nuxi.nl/
#ifndef QUEUE_H
#define QUEUE_H
#include <stddef.h>
// LIST: Double-linked list.
#define LIST_HEAD(name, type) \
struct name { \
struct type *l_first; \
}
#define LIST_HEAD_INITIALIZER(head) \
{ NULL }
#define LIST_ENTRY(type) \
struct { \
struct type *l_next; \
struct type **l_prev; \
}
#define LIST_FOREACH(var, head, field) \
for ((var) = (head)->l_first; (var) != NULL; (var) = (var)->field.l_next)
#define LIST_INIT(head) \
do { \
(head)->l_first = NULL; \
} while (0)
#define LIST_INSERT_HEAD(head, element, field) \
do { \
(element)->field.l_next = (head)->l_first; \
if ((head)->l_first != NULL) \
(head)->l_first->field.l_prev = &(element)->field.l_next; \
(head)->l_first = (element); \
(element)->field.l_prev = &(head)->l_first; \
} while (0)
#define LIST_REMOVE(element, field) \
do { \
if ((element)->field.l_next != NULL) \
(element)->field.l_next->field.l_prev = (element)->field.l_prev; \
*(element)->field.l_prev = (element)->field.l_next; \
} while (0)
// TAILQ: Double-linked list with tail pointer.
#define TAILQ_HEAD(name, type) \
struct name { \
struct type *t_first; \
struct type **t_last; \
}
#define TAILQ_ENTRY(type) \
struct { \
struct type *t_next; \
struct type **t_prev; \
}
#define TAILQ_EMPTY(head) ((head)->t_first == NULL)
#define TAILQ_FIRST(head) ((head)->t_first)
#define TAILQ_FOREACH(var, head, field) \
for ((var) = (head)->t_first; (var) != NULL; (var) = (var)->field.t_next)
#define TAILQ_INIT(head) \
do { \
(head)->t_first = NULL; \
(head)->t_last = &(head)->t_first; \
} while (0)
#define TAILQ_INSERT_TAIL(head, elm, field) \
do { \
(elm)->field.t_next = NULL; \
(elm)->field.t_prev = (head)->t_last; \
*(head)->t_last = (elm); \
(head)->t_last = &(elm)->field.t_next; \
} while (0)
#define TAILQ_REMOVE(head, element, field) \
do { \
if ((element)->field.t_next != NULL) \
(element)->field.t_next->field.t_prev = (element)->field.t_prev; \
else \
(head)->t_last = (element)->field.t_prev; \
*(element)->field.t_prev = (element)->field.t_next; \
} while (0)
#endif

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// Part of the Wasmtime Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://github.com/CraneStation/wasmtime/blob/master/LICENSE for license information.
//
// Significant parts of this file are derived from cloudabi-utils. See
// https://github.com/CraneStation/wasmtime/blob/master/lib/wasi/sandboxed-system-primitives/src/LICENSE
// for license information.
//
// The upstream file contains the following copyright notice:
//
// Copyright (c) 2016 Nuxi, https://nuxi.nl/
#include "config.h"
#include <fcntl.h>
#include <pthread.h>
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <string.h>
#include <unistd.h>
#include "random.h"
#if CONFIG_HAS_ARC4RANDOM_BUF
void random_buf(void *buf, size_t len) {
arc4random_buf(buf, len);
}
#elif CONFIG_HAS_GETRANDOM
#include <sys/random.h>
void random_buf(void *buf, size_t len) {
for (;;) {
ssize_t x = getrandom(buf, len, 0);
if (x < 0) {
if (errno == EINTR)
continue;
fprintf(stderr, "getrandom failed: %s", strerror(errno));
abort();
}
if (x == len)
return;
buf = (void *)((unsigned char *)buf + x);
len -= x;
}
}
#else
static int urandom;
static void open_urandom(void) {
urandom = open("/dev/urandom", O_RDONLY);
if (urandom < 0) {
fputs("Failed to open /dev/urandom\n", stderr);
abort();
}
}
void random_buf(void *buf, size_t len) {
static pthread_once_t open_once = PTHREAD_ONCE_INIT;
pthread_once(&open_once, open_urandom);
if (read(urandom, buf, len) != len) {
fputs("Short read on /dev/urandom\n", stderr);
abort();
}
}
#endif
// Calculates a random number within the range [0, upper - 1] without
// any modulo bias.
//
// The function below repeatedly obtains a random number from
// arc4random() until it lies within the range [2^k % upper, 2^k). As
// this range has length k * upper, we can safely obtain a number
// without any modulo bias.
uintmax_t random_uniform(uintmax_t upper) {
// Compute 2^k % upper
// == (2^k - upper) % upper
// == -upper % upper.
uintmax_t lower = -upper % upper;
for (;;) {
uintmax_t value;
random_buf(&value, sizeof(value));
if (value >= lower)
return value % upper;
}
}

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// Part of the Wasmtime Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://github.com/CraneStation/wasmtime/blob/master/LICENSE for license information.
//
// Significant parts of this file are derived from cloudabi-utils. See
// https://github.com/CraneStation/wasmtime/blob/master/lib/wasi/sandboxed-system-primitives/src/LICENSE
// for license information.
//
// The upstream file contains the following copyright notice:
//
// Copyright (c) 2016 Nuxi, https://nuxi.nl/
#ifndef RANDOM_H
#define RANDOM_H
#include <stdint.h>
void random_buf(void *, size_t);
uintmax_t random_uniform(uintmax_t);
#endif

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// Part of the Wasmtime Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://github.com/CraneStation/wasmtime/blob/master/LICENSE for license information.
//
// Significant parts of this file are derived from cloudabi-utils. See
// https://github.com/CraneStation/wasmtime/blob/master/lib/wasi/sandboxed-system-primitives/src/LICENSE
// for license information.
//
// The upstream file contains the following copyright notice:
//
// Copyright (c) 2016 Nuxi, https://nuxi.nl/
#ifndef REFCOUNT_H
#define REFCOUNT_H
#include <assert.h>
#include <stdatomic.h>
#include <stdbool.h>
#include "locking.h"
// Simple reference counter.
struct LOCKABLE refcount {
atomic_uint count;
};
#define PRODUCES(...) LOCKS_SHARED(__VA_ARGS__) NO_LOCK_ANALYSIS
#define CONSUMES(...) UNLOCKS(__VA_ARGS__) NO_LOCK_ANALYSIS
// Initialize the reference counter.
static void refcount_init(struct refcount *r, unsigned int count) PRODUCES(*r) {
atomic_init(&r->count, count);
}
// Increment the reference counter.
static inline void refcount_acquire(struct refcount *r) PRODUCES(*r) {
atomic_fetch_add_explicit(&r->count, 1, memory_order_acquire);
}
// Decrement the reference counter, returning whether the reference
// dropped to zero.
static inline bool refcount_release(struct refcount *r) CONSUMES(*r) {
int old = atomic_fetch_sub_explicit(&r->count, 1, memory_order_release);
assert(old != 0 && "Reference count becoming negative");
return old == 1;
}
#endif

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// Part of the Wasmtime Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://github.com/CraneStation/wasmtime/blob/master/LICENSE for license information.
//
// Significant parts of this file are derived from cloudabi-utils. See
// https://github.com/CraneStation/wasmtime/blob/master/lib/wasi/sandboxed-system-primitives/src/LICENSE
// for license information.
//
// The upstream file contains the following copyright notice:
//
// Copyright (c) 2016 Nuxi, https://nuxi.nl/
#ifndef RIGHTS_H
#define RIGHTS_H
#define RIGHTS_ALL \
(__WASI_RIGHT_FD_DATASYNC | __WASI_RIGHT_FD_READ | \
__WASI_RIGHT_FD_SEEK | __WASI_RIGHT_FD_FDSTAT_SET_FLAGS | \
__WASI_RIGHT_FD_SYNC | __WASI_RIGHT_FD_TELL | __WASI_RIGHT_FD_WRITE | \
__WASI_RIGHT_FD_ADVISE | __WASI_RIGHT_FD_ALLOCATE | \
__WASI_RIGHT_PATH_CREATE_DIRECTORY | __WASI_RIGHT_PATH_CREATE_FILE | \
__WASI_RIGHT_PATH_LINK_SOURCE | __WASI_RIGHT_PATH_LINK_TARGET | \
__WASI_RIGHT_PATH_OPEN | __WASI_RIGHT_FD_READDIR | \
__WASI_RIGHT_PATH_READLINK | __WASI_RIGHT_PATH_RENAME_SOURCE | \
__WASI_RIGHT_PATH_RENAME_TARGET | __WASI_RIGHT_PATH_FILESTAT_GET | \
__WASI_RIGHT_PATH_FILESTAT_SET_SIZE | \
__WASI_RIGHT_PATH_FILESTAT_SET_TIMES | \
__WASI_RIGHT_FD_FILESTAT_GET | __WASI_RIGHT_FD_FILESTAT_SET_TIMES | \
__WASI_RIGHT_FD_FILESTAT_SET_SIZE | \
__WASI_RIGHT_PATH_SYMLINK | __WASI_RIGHT_PATH_UNLINK_FILE | \
__WASI_RIGHT_PATH_REMOVE_DIRECTORY | \
__WASI_RIGHT_POLL_FD_READWRITE | __WASI_RIGHT_SOCK_SHUTDOWN)
// Block and character device interaction is outside the scope of
// CloudABI. Simply allow everything.
#define RIGHTS_BLOCK_DEVICE_BASE RIGHTS_ALL
#define RIGHTS_BLOCK_DEVICE_INHERITING RIGHTS_ALL
#define RIGHTS_CHARACTER_DEVICE_BASE RIGHTS_ALL
#define RIGHTS_CHARACTER_DEVICE_INHERITING RIGHTS_ALL
// Only allow directory operations on directories. Directories can only
// yield file descriptors to other directories and files.
#define RIGHTS_DIRECTORY_BASE \
(__WASI_RIGHT_FD_FDSTAT_SET_FLAGS | __WASI_RIGHT_FD_SYNC | \
__WASI_RIGHT_FD_ADVISE | __WASI_RIGHT_PATH_CREATE_DIRECTORY | \
__WASI_RIGHT_PATH_CREATE_FILE | __WASI_RIGHT_PATH_LINK_SOURCE | \
__WASI_RIGHT_PATH_LINK_TARGET | __WASI_RIGHT_PATH_OPEN | \
__WASI_RIGHT_FD_READDIR | __WASI_RIGHT_PATH_READLINK | \
__WASI_RIGHT_PATH_RENAME_SOURCE | __WASI_RIGHT_PATH_RENAME_TARGET | \
__WASI_RIGHT_PATH_FILESTAT_GET | \
__WASI_RIGHT_PATH_FILESTAT_SET_SIZE | \
__WASI_RIGHT_PATH_FILESTAT_SET_TIMES | \
__WASI_RIGHT_FD_FILESTAT_GET | __WASI_RIGHT_FD_FILESTAT_SET_TIMES | \
__WASI_RIGHT_PATH_SYMLINK | __WASI_RIGHT_PATH_UNLINK_FILE | \
__WASI_RIGHT_PATH_REMOVE_DIRECTORY | \
__WASI_RIGHT_POLL_FD_READWRITE)
#define RIGHTS_DIRECTORY_INHERITING \
(RIGHTS_DIRECTORY_BASE | RIGHTS_REGULAR_FILE_BASE)
// Operations that apply to regular files.
#define RIGHTS_REGULAR_FILE_BASE \
(__WASI_RIGHT_FD_DATASYNC | __WASI_RIGHT_FD_READ | \
__WASI_RIGHT_FD_SEEK | __WASI_RIGHT_FD_FDSTAT_SET_FLAGS | \
__WASI_RIGHT_FD_SYNC | __WASI_RIGHT_FD_TELL | __WASI_RIGHT_FD_WRITE | \
__WASI_RIGHT_FD_ADVISE | __WASI_RIGHT_FD_ALLOCATE | \
__WASI_RIGHT_FD_FILESTAT_GET | __WASI_RIGHT_FD_FILESTAT_SET_SIZE | \
__WASI_RIGHT_FD_FILESTAT_SET_TIMES | __WASI_RIGHT_POLL_FD_READWRITE)
#define RIGHTS_REGULAR_FILE_INHERITING 0
// Operations that apply to sockets and socket pairs.
#define RIGHTS_SOCKET_BASE \
(__WASI_RIGHT_FD_READ | __WASI_RIGHT_FD_FDSTAT_SET_FLAGS | \
__WASI_RIGHT_FD_WRITE | __WASI_RIGHT_FD_FILESTAT_GET | \
__WASI_RIGHT_POLL_FD_READWRITE | __WASI_RIGHT_SOCK_SHUTDOWN)
#define RIGHTS_SOCKET_INHERITING RIGHTS_ALL
// Operations that apply to TTYs.
#define RIGHTS_TTY_BASE \
(__WASI_RIGHT_FD_READ | __WASI_RIGHT_FD_FDSTAT_SET_FLAGS | \
__WASI_RIGHT_FD_WRITE | __WASI_RIGHT_FD_FILESTAT_GET | \
__WASI_RIGHT_POLL_FD_READWRITE)
#define RIGHTS_TTY_INHERITING 0
#endif

17
wasmtime-wasi-c/sandboxed-system-primitives/src/signals.h Normal file
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// Part of the Wasmtime Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://github.com/CraneStation/wasmtime/blob/master/LICENSE for license information.
//
// Significant parts of this file are derived from cloudabi-utils. See
// https://github.com/CraneStation/wasmtime/blob/master/lib/wasi/sandboxed-system-primitives/src/LICENSE
// for license information.
//
// The upstream file contains the following copyright notice:
//
// Copyright (c) 2016 Nuxi, https://nuxi.nl/
#ifndef SIGNALS_H
#define SIGNALS_H
void signals_init(void);
#endif

33
wasmtime-wasi-c/sandboxed-system-primitives/src/str.c Normal file
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@@ -0,0 +1,33 @@
// Part of the Wasmtime Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://github.com/CraneStation/wasmtime/blob/master/LICENSE for license information.
//
// Significant parts of this file are derived from cloudabi-utils. See
// https://github.com/CraneStation/wasmtime/blob/master/lib/wasi/sandboxed-system-primitives/src/LICENSE
// for license information.
//
// The upstream file contains the following copyright notice:
//
// Copyright (c) 2016 Nuxi, https://nuxi.nl/
#include "config.h"
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include "str.h"
char *str_nullterminate(const char *s, size_t len) {
// Copy string.
char *ret = strndup(s, len);
if (ret == NULL)
return NULL;
// Ensure that it contains no null bytes within.
if (strlen(ret) != len) {
free(ret);
errno = EILSEQ;
return NULL;
}
return ret;
}

19
wasmtime-wasi-c/sandboxed-system-primitives/src/str.h Normal file
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// Part of the Wasmtime Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://github.com/CraneStation/wasmtime/blob/master/LICENSE for license information.
//
// Significant parts of this file are derived from cloudabi-utils. See
// https://github.com/CraneStation/wasmtime/blob/master/lib/wasi/sandboxed-system-primitives/src/LICENSE
// for license information.
//
// The upstream file contains the following copyright notice:
//
// Copyright (c) 2016 Nuxi, https://nuxi.nl/
#ifndef STR_H
#define STR_H
#include "config.h"
char *str_nullterminate(const char *, size_t);
#endif

6
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#![allow(non_camel_case_types, dead_code)]
include!(concat!(env!("OUT_DIR"), "/wasmtime_ssp.rs"));
pub type char = ::std::os::raw::c_char;
pub type void = ::std::os::raw::c_void;

205
wasmtime-wasi-c/src/instantiate.rs Normal file
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use crate::host::{
argv_environ_init, argv_environ_values, fd_prestats, fd_prestats_init, fd_prestats_insert,
fd_table, fd_table_init, fd_table_insert_existing,
};
use cranelift_codegen::ir::types;
use cranelift_codegen::{ir, isa};
use cranelift_entity::PrimaryMap;
use cranelift_wasm::DefinedFuncIndex;
use std::cell::RefCell;
use std::collections::HashMap;
use std::ffi::CString;
use std::fs::File;
use std::mem;
use std::os::unix::io::AsRawFd;
use std::rc::Rc;
use syscalls;
use target_lexicon::HOST;
use wasmtime_environ::{translate_signature, Export, Module};
use wasmtime_runtime::{Imports, InstanceHandle, InstantiationError, VMFunctionBody};
pub(crate) struct WASIState {
pub curfds: Box<fd_table>,
pub prestats: Box<fd_prestats>,
pub argv_environ: Box<argv_environ_values>,
}
/// Return an instance implementing the "wasi" interface.
pub fn instantiate_wasi_c(
prefix: &str,
global_exports: Rc<RefCell<HashMap<String, Option<wasmtime_runtime::Export>>>>,
preopened_dirs: &[(String, File)],
argv: &[String],
environ: &[(String, String)],
) -> Result<InstanceHandle, InstantiationError> {
let pointer_type = types::Type::triple_pointer_type(&HOST);
let mut module = Module::new();
let mut finished_functions: PrimaryMap<DefinedFuncIndex, *const VMFunctionBody> =
PrimaryMap::new();
let call_conv = isa::CallConv::triple_default(&HOST);
macro_rules! signature {
($name:ident) => {{
let sig = module.signatures.push(translate_signature(
ir::Signature {
params: syscalls::$name::params()
.into_iter()
.map(ir::AbiParam::new)
.collect(),
returns: syscalls::$name::results()
.into_iter()
.map(ir::AbiParam::new)
.collect(),
call_conv,
},
pointer_type,
));
let func = module.functions.push(sig);
module.exports.insert(
prefix.to_owned() + stringify!($name),
Export::Function(func),
);
finished_functions.push(syscalls::$name::SHIM as *const VMFunctionBody);
}};
}
signature!(args_get);
signature!(args_sizes_get);
signature!(clock_res_get);
signature!(clock_time_get);
signature!(environ_get);
signature!(environ_sizes_get);
signature!(fd_prestat_get);
signature!(fd_prestat_dir_name);
signature!(fd_close);
signature!(fd_datasync);
signature!(fd_pread);
signature!(fd_pwrite);
signature!(fd_read);
signature!(fd_renumber);
signature!(fd_seek);
signature!(fd_tell);
signature!(fd_fdstat_get);
signature!(fd_fdstat_set_flags);
signature!(fd_fdstat_set_rights);
signature!(fd_sync);
signature!(fd_write);
signature!(fd_advise);
signature!(fd_allocate);
signature!(path_create_directory);
signature!(path_link);
signature!(path_open);
signature!(fd_readdir);
signature!(path_readlink);
signature!(path_rename);
signature!(fd_filestat_get);
signature!(fd_filestat_set_times);
signature!(fd_filestat_set_size);
signature!(path_filestat_get);
signature!(path_filestat_set_times);
signature!(path_symlink);
signature!(path_unlink_file);
signature!(path_remove_directory);
signature!(poll_oneoff);
signature!(proc_exit);
signature!(proc_raise);
signature!(random_get);
signature!(sched_yield);
signature!(sock_recv);
signature!(sock_send);
signature!(sock_shutdown);
let imports = Imports::none();
let data_initializers = Vec::new();
let signatures = PrimaryMap::new();
let mut curfds = Box::new(unsafe { mem::zeroed::<fd_table>() });
let mut prestats = Box::new(unsafe { mem::zeroed::<fd_prestats>() });
let mut argv_environ = Box::new(unsafe { mem::zeroed::<argv_environ_values>() });
unsafe {
let argv_environ: &mut argv_environ_values = &mut *argv_environ;
let (argv_offsets, argv_buf, environ_offsets, environ_buf) =
allocate_argv_environ(argv, environ);
argv_environ_init(
argv_environ,
argv_offsets.as_ptr(),
argv_offsets.len(),
argv_buf.as_ptr(),
argv_buf.len(),
environ_offsets.as_ptr(),
environ_offsets.len(),
environ_buf.as_ptr(),
environ_buf.len(),
);
let curfds: *mut fd_table = &mut *curfds;
fd_table_init(curfds);
let prestats: *mut fd_prestats = &mut *prestats;
fd_prestats_init(prestats);
// Prepopulate curfds with stdin, stdout, and stderr file descriptors.
assert!(fd_table_insert_existing(curfds, 0, 0));
assert!(fd_table_insert_existing(curfds, 1, 1));
assert!(fd_table_insert_existing(curfds, 2, 2));
let mut wasm_fd = 3;
for (dir, file) in preopened_dirs {
assert!(fd_table_insert_existing(curfds, wasm_fd, file.as_raw_fd()));
assert!(fd_prestats_insert(
prestats,
CString::new(dir.as_str()).unwrap().as_ptr(),
wasm_fd,
));
wasm_fd += 1;
}
}
let host_state = WASIState {
curfds,
prestats,
argv_environ,
};
InstanceHandle::new(
Rc::new(module),
global_exports,
finished_functions.into_boxed_slice(),
imports,
&data_initializers,
signatures.into_boxed_slice(),
None,
Box::new(host_state),
)
}
fn allocate_argv_environ(
argv: &[String],
environ: &[(String, String)],
) -> (Vec<usize>, Vec<libc::c_char>, Vec<usize>, Vec<libc::c_char>) {
let mut argv_offsets = Vec::new();
let mut argv_buf = Vec::new();
let mut environ_offsets = Vec::new();
let mut environ_buf = Vec::new();
for arg in argv {
argv_offsets.push(argv_buf.len());
for c in arg.bytes() {
argv_buf.push(c as libc::c_char);
}
argv_buf.push('\0' as libc::c_char);
}
for (key, value) in environ {
environ_offsets.push(environ_buf.len());
for c in key.bytes() {
environ_buf.push(c as libc::c_char);
}
environ_buf.push('=' as libc::c_char);
for c in value.bytes() {
environ_buf.push(c as libc::c_char);
}
environ_buf.push('\0' as libc::c_char);
}
(argv_offsets, argv_buf, environ_offsets, environ_buf)
}

18
wasmtime-wasi-c/src/lib.rs Normal file
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extern crate cast;
extern crate cranelift_codegen;
extern crate cranelift_entity;
extern crate cranelift_wasm;
extern crate target_lexicon;
extern crate wasmtime_environ;
extern crate wasmtime_jit;
extern crate wasmtime_runtime;
#[macro_use]
extern crate log;
mod host;
mod instantiate;
mod syscalls;
mod translate;
mod wasm32;
pub use instantiate::instantiate_wasi_c;

1557
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573
wasmtime-wasi-c/src/translate.rs Normal file
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@@ -0,0 +1,573 @@
use cast;
use cast::From as _0;
use host;
use std::mem::{align_of, size_of, zeroed};
use std::slice;
use wasm32;
use wasmtime_runtime::{Export, VMContext};
/// Translate a wasm pointer into a native pointer.
///
/// This is unsafe due to trusting the contents of vmctx. The pointer result
/// is bounds and alignment checked.
unsafe fn decode_ptr(
vmctx: &mut VMContext,
ptr: wasm32::uintptr_t,
len: usize,
align: usize,
) -> Result<*mut u8, host::__wasi_errno_t> {
match vmctx.lookup_global_export("memory") {
Some(Export::Memory {
definition,
vmctx: _,
memory: _,
}) => {
if len > 0 {
// Check for overflow within the access.
let last = match (ptr as usize).checked_add(len - 1) {
Some(sum) => sum,
None => {
println!("!!! overflow");
return Err(host::__WASI_EFAULT as host::__wasi_errno_t);
}
};
// Check for out of bounds.
if last >= (*definition).current_length {
println!("!!! out of bounds");
return Err(host::__WASI_EFAULT as host::__wasi_errno_t);
}
}
// Check alignment.
if (ptr as usize) % align != 0 {
println!("!!! bad alignment: {} % {}", ptr, align);
return Err(host::__WASI_EINVAL as host::__wasi_errno_t);
}
// Ok, translate the address.
Ok((((*definition).base as usize) + (ptr as usize)) as *mut u8)
}
// No export named "__wasi_memory", or the export isn't a memory.
// FIXME: Is EINVAL the best code here?
x => {
println!(
"!!! no export named __wasi_memory, or the export isn't a mem: {:?}",
x
);
Err(host::__WASI_EINVAL as host::__wasi_errno_t)
}
}
}
unsafe fn decode_ptr_to<T>(
vmctx: &mut VMContext,
ptr: wasm32::uintptr_t,
) -> Result<*mut T, host::__wasi_errno_t> {
decode_ptr(vmctx, ptr, size_of::<T>(), align_of::<T>()).map(|ptr| ptr as *mut T)
}
unsafe fn decode_pointee<T>(
vmctx: &mut VMContext,
ptr: wasm32::uintptr_t,
) -> Result<(), host::__wasi_errno_t> {
// Check bounds and alignment.
decode_ptr_to::<T>(vmctx, ptr)?;
Ok(())
}
pub unsafe fn encode_pointee<T>(vmctx: &mut VMContext, ptr: wasm32::uintptr_t, t: T) {
// Bounds and alignment are checked in `decode_pointee`.
let ptr = decode_ptr_to::<T>(vmctx, ptr).unwrap();
ptr.write(t);
}
pub unsafe fn decode_slice_of<T>(
vmctx: &mut VMContext,
ptr: wasm32::uintptr_t,
len: wasm32::size_t,
) -> Result<(*mut T, usize), host::__wasi_errno_t> {
let len = cast::usize(len);
let ptr = decode_ptr(
vmctx,
ptr,
size_of::<T>().checked_mul(len).unwrap(),
align_of::<T>(),
)? as *mut T;
Ok((ptr, len))
}
pub fn encode_usize(len: usize) -> wasm32::size_t {
cast::u32(len).unwrap()
}
pub fn encode_device(device: host::__wasi_device_t) -> wasm32::__wasi_device_t {
device
}
pub fn encode_inode(inode: host::__wasi_inode_t) -> wasm32::__wasi_inode_t {
inode
}
pub fn encode_linkcount(linkcount: host::__wasi_linkcount_t) -> wasm32::__wasi_linkcount_t {
linkcount
}
pub fn decode_userdata(userdata: wasm32::__wasi_userdata_t) -> host::__wasi_userdata_t {
userdata
}
pub fn encode_userdata(userdata: host::__wasi_userdata_t) -> wasm32::__wasi_userdata_t {
userdata
}
pub fn decode_eventtype(eventtype: wasm32::__wasi_eventtype_t) -> host::__wasi_eventtype_t {
eventtype
}
pub fn encode_eventtype(eventtype: host::__wasi_eventtype_t) -> wasm32::__wasi_eventtype_t {
eventtype
}
pub fn decode_filesize(filesize: wasm32::__wasi_filesize_t) -> host::__wasi_filesize_t {
filesize
}
pub fn encode_filesize(filesize: host::__wasi_filesize_t) -> wasm32::__wasi_filesize_t {
filesize
}
pub fn encode_eventrwflags(
eventrwflags: host::__wasi_eventrwflags_t,
) -> wasm32::__wasi_eventrwflags_t {
eventrwflags
}
pub fn decode_subclockflags(
subclockflags: wasm32::__wasi_subclockflags_t,
) -> host::__wasi_subclockflags_t {
subclockflags
}
pub fn decode_fd(fd: wasm32::__wasi_fd_t) -> host::__wasi_fd_t {
fd
}
pub fn decode_filedelta(filedelta: wasm32::__wasi_filedelta_t) -> host::__wasi_filedelta_t {
filedelta
}
pub fn decode_whence(whence: wasm32::__wasi_whence_t) -> host::__wasi_whence_t {
whence
}
pub fn decode_clockid(clockid: wasm32::__wasi_clockid_t) -> host::__wasi_clockid_t {
clockid
}
pub fn decode_timestamp(timestamp: wasm32::__wasi_timestamp_t) -> host::__wasi_timestamp_t {
timestamp
}
pub fn encode_timestamp(timestamp: host::__wasi_timestamp_t) -> wasm32::__wasi_timestamp_t {
timestamp
}
pub fn decode_exitcode(exitcode: wasm32::__wasi_exitcode_t) -> host::__wasi_exitcode_t {
exitcode
}
pub fn decode_lookupflags(lookupflags: wasm32::__wasi_lookupflags_t) -> host::__wasi_lookupflags_t {
lookupflags
}
pub fn decode_oflags(oflags: wasm32::__wasi_oflags_t) -> host::__wasi_oflags_t {
oflags
}
pub fn decode_advice(advice: wasm32::__wasi_advice_t) -> host::__wasi_advice_t {
advice
}
pub fn decode_dircookie(dircookie: wasm32::__wasi_dircookie_t) -> host::__wasi_dircookie_t {
dircookie
}
pub fn encode_preopentype(preopentype: host::__wasi_preopentype_t) -> wasm32::__wasi_preopentype_t {
preopentype
}
pub fn encode_filetype(filetype: host::__wasi_filetype_t) -> wasm32::__wasi_filetype_t {
filetype
}
pub fn decode_fstflags(fstflags: wasm32::__wasi_fstflags_t) -> host::__wasi_fstflags_t {
fstflags
}
#[allow(dead_code)]
pub fn encode_fstflags(fstflags: host::__wasi_fstflags_t) -> wasm32::__wasi_fstflags_t {
fstflags
}
pub fn decode_fdflags(fdflags: wasm32::__wasi_fdflags_t) -> host::__wasi_fdflags_t {
fdflags
}
pub fn encode_fdflags(fdflags: host::__wasi_fdflags_t) -> wasm32::__wasi_fdflags_t {
fdflags
}
pub fn decode_sdflags(sdflags: wasm32::__wasi_sdflags_t) -> host::__wasi_sdflags_t {
sdflags
}
pub fn decode_rights(rights: wasm32::__wasi_rights_t) -> host::__wasi_rights_t {
rights
}
pub fn encode_rights(rights: host::__wasi_rights_t) -> wasm32::__wasi_rights_t {
rights
}
pub fn decode_riflags(riflags: wasm32::__wasi_riflags_t) -> host::__wasi_riflags_t {
riflags
}
pub fn decode_siflags(siflags: wasm32::__wasi_siflags_t) -> host::__wasi_siflags_t {
siflags
}
pub unsafe fn decode_char_slice(
vmctx: &mut VMContext,
ptr: wasm32::uintptr_t,
len: wasm32::size_t,
) -> Result<(*mut host::char, usize), host::__wasi_errno_t> {
decode_slice_of::<wasm32::char>(vmctx, ptr, len)
}
pub unsafe fn decode_charstar_slice(
vmctx: &mut VMContext,
ptr: wasm32::uintptr_t,
count: wasm32::size_t,
) -> Result<(*mut wasm32::uintptr_t, usize), host::__wasi_errno_t> {
decode_slice_of::<wasm32::uintptr_t>(vmctx, ptr, count)
}
pub unsafe fn encode_charstar_slice(
ptr: *mut wasm32::uintptr_t,
host_vec: Vec<*mut libc::c_char>,
guest_base: wasm32::uintptr_t,
host_base: *mut libc::c_char,
) {
for (i, host) in host_vec.iter().enumerate() {
let guest = if host.is_null() {
0
} else {
guest_base + (*host as usize - host_base as usize) as wasm32::uintptr_t
};
ptr.add(i).write(guest);
}
}
pub unsafe fn decode_ciovec(
vmctx: &mut VMContext,
ciovec: &wasm32::__wasi_ciovec_t,
) -> Result<host::__wasi_ciovec_t, host::__wasi_errno_t> {
let len = cast::usize(ciovec.buf_len);
Ok(host::__wasi_ciovec_t {
buf: decode_ptr(vmctx, ciovec.buf, len, 1)? as *const host::void,
buf_len: len,
})
}
pub unsafe fn decode_iovec(
vmctx: &mut VMContext,
iovec: &wasm32::__wasi_iovec_t,
) -> Result<host::__wasi_iovec_t, host::__wasi_errno_t> {
let len = cast::usize(iovec.buf_len);
Ok(host::__wasi_iovec_t {
buf: decode_ptr(vmctx, iovec.buf, len, 1)? as *mut host::void,
buf_len: len,
})
}
pub unsafe fn decode_ciovec_slice(
vmctx: &mut VMContext,
ptr: wasm32::uintptr_t,
len: wasm32::size_t,
) -> Result<Vec<host::__wasi_ciovec_t>, host::__wasi_errno_t> {
let slice = decode_slice_of::<wasm32::__wasi_ciovec_t>(vmctx, ptr, len)?;
let slice = slice::from_raw_parts(slice.0, slice.1);
slice.iter().map(|iov| decode_ciovec(vmctx, iov)).collect()
}
pub unsafe fn decode_iovec_slice(
vmctx: &mut VMContext,
ptr: wasm32::uintptr_t,
len: wasm32::size_t,
) -> Result<Vec<host::__wasi_iovec_t>, host::__wasi_errno_t> {
let slice = decode_slice_of::<wasm32::__wasi_iovec_t>(vmctx, ptr, len)?;
let slice = slice::from_raw_parts(slice.0, slice.1);
slice.iter().map(|iov| decode_iovec(vmctx, iov)).collect()
}
pub fn decode_subscription(
guest_subscription: wasm32::__wasi_subscription_t,
) -> Result<host::__wasi_subscription_t, host::__wasi_errno_t> {
let mut host_subscription = host::__wasi_subscription_t {
userdata: decode_userdata(guest_subscription.userdata),
type_: decode_eventtype(guest_subscription.type_),
u: unsafe { zeroed() },
};
match guest_subscription.type_ {
wasm32::__WASI_EVENTTYPE_CLOCK => unsafe {
host_subscription.u.clock =
host::__wasi_subscription_t___wasi_subscription_u___wasi_subscription_u_clock_t {
identifier: decode_userdata(guest_subscription.u.clock.identifier),
clock_id: decode_clockid(guest_subscription.u.clock.clock_id),
timeout: decode_timestamp(guest_subscription.u.clock.timeout),
precision: decode_timestamp(guest_subscription.u.clock.precision),
flags: decode_subclockflags(guest_subscription.u.clock.flags),
};
},
wasm32::__WASI_EVENTTYPE_FD_READ | wasm32::__WASI_EVENTTYPE_FD_WRITE => unsafe {
host_subscription
.u
.fd_readwrite =
host::__wasi_subscription_t___wasi_subscription_u___wasi_subscription_u_fd_readwrite_t {
fd: decode_fd(guest_subscription.u.fd_readwrite.fd),
}
},
_ => return Err(host::__WASI_EINVAL as host::__wasi_errno_t),
};
Ok(host_subscription)
}
pub unsafe fn decode_subscription_slice(
vmctx: &mut VMContext,
ptr: wasm32::uintptr_t,
len: wasm32::size_t,
) -> Result<Vec<host::__wasi_subscription_t>, host::__wasi_errno_t> {
let slice = decode_slice_of::<wasm32::__wasi_subscription_t>(vmctx, ptr, len)?;
let slice = slice::from_raw_parts(slice.0, slice.1);
slice
.iter()
.map(|subscription| decode_subscription(*subscription))
.collect()
}
pub fn encode_event(host_event: host::__wasi_event_t) -> wasm32::__wasi_event_t {
let mut guest_event = wasm32::__wasi_event_t {
userdata: encode_userdata(host_event.userdata),
error: encode_errno(host_event.error),
type_: encode_eventtype(host_event.type_),
u: unsafe { zeroed() },
__bindgen_padding_0: 0,
};
match u32::from(host_event.type_) {
host::__WASI_EVENTTYPE_CLOCK => {}
host::__WASI_EVENTTYPE_FD_READ | host::__WASI_EVENTTYPE_FD_WRITE => unsafe {
guest_event.u.fd_readwrite =
wasm32::__wasi_event_t___wasi_event_u___wasi_event_u_fd_readwrite_t {
nbytes: encode_filesize(host_event.u.fd_readwrite.nbytes),
flags: encode_eventrwflags(host_event.u.fd_readwrite.flags),
__bindgen_padding_0: zeroed(),
}
},
_ => panic!("unrecognized event type"),
};
guest_event
}
pub unsafe fn decode_event_slice(
vmctx: &mut VMContext,
ptr: wasm32::uintptr_t,
len: wasm32::size_t,
) -> Result<(*mut wasm32::__wasi_event_t, usize), host::__wasi_errno_t> {
decode_slice_of::<wasm32::__wasi_event_t>(vmctx, ptr, len)
}
pub unsafe fn encode_event_slice(
ptr: *mut wasm32::__wasi_event_t,
host_vec: Vec<host::__wasi_event_t>,
) {
for (i, host) in host_vec.iter().enumerate() {
let guest = encode_event(*host);
ptr.add(i * size_of::<wasm32::__wasi_event_t>())
.write(guest);
}
}
pub unsafe fn decode_fd_byref(
vmctx: &mut VMContext,
fd_ptr: wasm32::uintptr_t,
) -> Result<(), host::__wasi_errno_t> {
decode_pointee::<wasm32::__wasi_fd_t>(vmctx, fd_ptr)
}
pub unsafe fn encode_fd_byref(
vmctx: &mut VMContext,
fd_ptr: wasm32::uintptr_t,
fd: host::__wasi_fd_t,
) {
encode_pointee::<wasm32::__wasi_fd_t>(vmctx, fd_ptr, wasm32::size_t::cast(fd))
}
pub unsafe fn decode_timestamp_byref(
vmctx: &mut VMContext,
timestamp_ptr: wasm32::uintptr_t,
) -> Result<(), host::__wasi_errno_t> {
decode_pointee::<wasm32::__wasi_timestamp_t>(vmctx, timestamp_ptr)
}
pub unsafe fn encode_timestamp_byref(
vmctx: &mut VMContext,
timestamp_ptr: wasm32::uintptr_t,
host_timestamp: host::__wasi_timestamp_t,
) {
encode_pointee::<wasm32::__wasi_timestamp_t>(
vmctx,
timestamp_ptr,
wasm32::__wasi_timestamp_t::cast(host_timestamp),
)
}
pub unsafe fn decode_filesize_byref(
vmctx: &mut VMContext,
filesize_ptr: wasm32::uintptr_t,
) -> Result<(), host::__wasi_errno_t> {
decode_pointee::<wasm32::__wasi_filesize_t>(vmctx, filesize_ptr)
}
pub unsafe fn encode_filesize_byref(
vmctx: &mut VMContext,
filesize_ptr: wasm32::uintptr_t,
host_filesize: host::__wasi_filesize_t,
) {
encode_pointee::<wasm32::__wasi_filesize_t>(
vmctx,
filesize_ptr,
wasm32::__wasi_filesize_t::cast(host_filesize),
)
}
pub unsafe fn decode_roflags_byref(
vmctx: &mut VMContext,
roflags_ptr: wasm32::uintptr_t,
) -> Result<(), host::__wasi_errno_t> {
decode_pointee::<wasm32::__wasi_roflags_t>(vmctx, roflags_ptr)
}
pub unsafe fn encode_roflags_byref(
vmctx: &mut VMContext,
roflags_ptr: wasm32::uintptr_t,
host_roflags: host::__wasi_roflags_t,
) {
encode_pointee::<wasm32::__wasi_roflags_t>(
vmctx,
roflags_ptr,
wasm32::__wasi_roflags_t::cast(host_roflags),
)
}
pub unsafe fn decode_usize_byref(
vmctx: &mut VMContext,
usize_ptr: wasm32::uintptr_t,
) -> Result<(), host::__wasi_errno_t> {
decode_pointee::<wasm32::size_t>(vmctx, usize_ptr)
}
pub unsafe fn encode_usize_byref(
vmctx: &mut VMContext,
usize_ptr: wasm32::uintptr_t,
host_usize: usize,
) {
encode_pointee::<wasm32::size_t>(vmctx, usize_ptr, wasm32::size_t::cast(host_usize).unwrap())
}
pub unsafe fn decode_prestat_byref(
vmctx: &mut VMContext,
prestat_ptr: wasm32::uintptr_t,
) -> Result<(), host::__wasi_errno_t> {
decode_pointee::<wasm32::__wasi_prestat_t>(vmctx, prestat_ptr)?;
Ok(())
}
pub unsafe fn encode_prestat_byref(
vmctx: &mut VMContext,
prestat_ptr: wasm32::uintptr_t,
host_prestat: host::__wasi_prestat_t,
) {
let wasm32_prestat = wasm32::__wasi_prestat_t {
pr_type: encode_preopentype(host_prestat.pr_type),
u: wasm32::__wasi_prestat_t___wasi_prestat_u {
dir: wasm32::__wasi_prestat_t___wasi_prestat_u___wasi_prestat_u_dir_t {
pr_name_len: encode_usize(host_prestat.u.dir.pr_name_len),
},
},
};
encode_pointee::<wasm32::__wasi_prestat_t>(vmctx, prestat_ptr, wasm32_prestat)
}
pub unsafe fn decode_fdstat_byref(
vmctx: &mut VMContext,
fdstat_ptr: wasm32::uintptr_t,
) -> Result<(), host::__wasi_errno_t> {
decode_pointee::<wasm32::__wasi_fdstat_t>(vmctx, fdstat_ptr)?;
Ok(())
}
pub unsafe fn encode_fdstat_byref(
vmctx: &mut VMContext,
fdstat_ptr: wasm32::uintptr_t,
host_fdstat: host::__wasi_fdstat_t,
) {
let wasm32_fdstat = wasm32::__wasi_fdstat_t {
fs_filetype: encode_filetype(host_fdstat.fs_filetype),
fs_flags: encode_fdflags(host_fdstat.fs_flags),
__bindgen_padding_0: 0,
fs_rights_base: encode_rights(host_fdstat.fs_rights_base),
fs_rights_inheriting: encode_rights(host_fdstat.fs_rights_inheriting),
};
encode_pointee::<wasm32::__wasi_fdstat_t>(vmctx, fdstat_ptr, wasm32_fdstat)
}
pub unsafe fn decode_filestat_byref(
vmctx: &mut VMContext,
filestat_ptr: wasm32::uintptr_t,
) -> Result<(), host::__wasi_errno_t> {
decode_pointee::<wasm32::__wasi_filestat_t>(vmctx, filestat_ptr)?;
Ok(())
}
pub unsafe fn encode_filestat_byref(
vmctx: &mut VMContext,
filestat_ptr: wasm32::uintptr_t,
host_filestat: host::__wasi_filestat_t,
) {
let wasm32_filestat = wasm32::__wasi_filestat_t {
st_dev: encode_device(host_filestat.st_dev),
st_ino: encode_inode(host_filestat.st_ino),
st_filetype: encode_filetype(host_filestat.st_filetype),
st_nlink: encode_linkcount(host_filestat.st_nlink),
st_size: encode_filesize(host_filestat.st_size),
st_atim: encode_timestamp(host_filestat.st_atim),
st_mtim: encode_timestamp(host_filestat.st_mtim),
st_ctim: encode_timestamp(host_filestat.st_ctim),
};
encode_pointee::<wasm32::__wasi_filestat_t>(vmctx, filestat_ptr, wasm32_filestat)
}
pub fn encode_errno(e: host::__wasi_errno_t) -> wasm32::__wasi_errno_t {
assert!(e <= wasm32::__WASI_ENOTCAPABLE);
e
}

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wasmtime-wasi/README.md
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@@ -1,5 +1,5 @@
This is the `wasmtime-wasi` crate, which implements the This is the `wasmtime-wasi` crate, which implements the
WebAssembly System Interface (WASI) API. WebAssembly System Interface (WASI) API in Rust.
WASI is greatly inspired by and directly derived from [CloudABI]. WASI is greatly inspired by and directly derived from [CloudABI].
It differs in that it has aspirations to expand to a greater It differs in that it has aspirations to expand to a greater