update

[rust.git] / src / etc / wasm32-shim.js

diff --git a/src/etc/wasm32-shim.js b/src/etc/wasm32-shim.js
index 378aae597331600acfbf5e42f1242c6e46c10870..262a53eabe3c7bf3030eafc9c8c79a8d3000522c 100644 (file)
--- a/src/etc/wasm32-shim.js
+++ b/src/etc/wasm32-shim.js
@@ -1,13 +1,3 @@
-// Copyright 2017 The Rust Project Developers. See the COPYRIGHT
-// file at the top-level directory of this distribution and at
-// http://rust-lang.org/COPYRIGHT.
-//
-// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
-// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
-// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
-// option. This file may not be copied, modified, or distributed
-// except according to those terms.
-
 // This is a small "shim" program which is used when wasm32 unit tests are run
 // in this repository. This program is intended to be run in node.js and will
 // load a wasm module into memory, instantiate it with a set of imports, and
@@ -25,113 +15,7 @@ const buffer = fs.readFileSync(process.argv[2]);
 Error.stackTraceLimit = 20;
 
 let m = new WebAssembly.Module(buffer);
-
-let memory = null;
-
-function viewstruct(data, fields) {
-  return new Uint32Array(memory.buffer).subarray(data/4, data/4 + fields);
-}
-
-function copystr(a, b) {
-  let view = new Uint8Array(memory.buffer).subarray(a, a + b);
-  return String.fromCharCode.apply(null, view);
-}
-
-function syscall_write([fd, ptr, len]) {
-  let s = copystr(ptr, len);
-  switch (fd) {
-    case 1: process.stdout.write(s); break;
-    case 2: process.stderr.write(s); break;
-  }
-}
-
-function syscall_exit([code]) {
-  process.exit(code);
-}
-
-function syscall_args(params) {
-  let [ptr, len] = params;
-
-  // Calculate total required buffer size
-  let totalLen = -1;
-  for (let i = 2; i < process.argv.length; ++i) {
-    totalLen += Buffer.byteLength(process.argv[i]) + 1;
-  }
-  if (totalLen < 0) { totalLen = 0; }
-  params[2] = totalLen;
-
-  // If buffer is large enough, copy data
-  if (len >= totalLen) {
-    let view = new Uint8Array(memory.buffer);
-    for (let i = 2; i < process.argv.length; ++i) {
-      let value = process.argv[i];
-      Buffer.from(value).copy(view, ptr);
-      ptr += Buffer.byteLength(process.argv[i]) + 1;
-    }
-  }
-}
-
-function syscall_getenv(params) {
-  let [keyPtr, keyLen, valuePtr, valueLen] = params;
-
-  let key = copystr(keyPtr, keyLen);
-  let value = process.env[key];
-
-  if (value == null) {
-    params[4] = 0xFFFFFFFF;
-  } else {
-    let view = new Uint8Array(memory.buffer);
-    let totalLen = Buffer.byteLength(value);
-    params[4] = totalLen;
-    if (valueLen >= totalLen) {
-      Buffer.from(value).copy(view, valuePtr);
-    }
-  }
-}
-
-function syscall_time(params) {
-  let t = Date.now();
-  let secs = Math.floor(t / 1000);
-  let millis = t % 1000;
-  params[1] = Math.floor(secs / 0x100000000);
-  params[2] = secs % 0x100000000;
-  params[3] = Math.floor(millis * 1000000);
-}
-
-let imports = {};
-imports.env = {
-  // These are generated by LLVM itself for various intrinsic calls. Hopefully
-  // one day this is not necessary and something will automatically do this.
-  fmod: function(x, y) { return x % y; },
-  exp2: function(x) { return Math.pow(2, x); },
-  exp2f: function(x) { return Math.pow(2, x); },
-  ldexp: function(x, y) { return x * Math.pow(2, y); },
-  ldexpf: function(x, y) { return x * Math.pow(2, y); },
-  sin: Math.sin,
-  sinf: Math.sin,
-  cos: Math.cos,
-  cosf: Math.cos,
-  log: Math.log,
-  log2: Math.log2,
-  log10: Math.log10,
-  log10f: Math.log10,
-
-  rust_wasm_syscall: function(index, data) {
-    switch (index) {
-      case 1: syscall_write(viewstruct(data, 3)); return true;
-      case 2: syscall_exit(viewstruct(data, 1)); return true;
-      case 3: syscall_args(viewstruct(data, 3)); return true;
-      case 4: syscall_getenv(viewstruct(data, 5)); return true;
-      case 6: syscall_time(viewstruct(data, 4)); return true;
-      default:
-        console.log("Unsupported syscall: " + index);
-        return false;
-    }
-  }
-};
-
-let instance = new WebAssembly.Instance(m, imports);
-memory = instance.exports.memory;
+let instance = new WebAssembly.Instance(m, {});
 try {
   instance.exports.main();
 } catch (e) {