Dumped code from the wasm2cretonne repo.
Integrated wasm test suite translation as cretonne test Fixes #146. Fixes #143.
This commit is contained in:
Denis Merigoux
committed by
Jakob Stoklund Olesen
Jakob Stoklund Olesen
parent
e8276ed965
commit
ee9989c4b9
227
cranelift/src/wasm.rs
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227
cranelift/src/wasm.rs
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//! CLI tool to use the functions provided by crates [wasm2cretonne](../wasm2cretonne/index.html)
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//! and [wasmstandalone](../wasmstandalone/index.html).
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//!
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//! Reads Wasm binary files (one Wasm module per file), translates the functions' code to Cretonne
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//! IL. Can also executes the `start` function of the module by laying out the memories, globals
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//! and tables, then emitting the translated code with hardcoded addresses to memory.
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use cretonne_wasm::{translate_module, FunctionTranslation, DummyRuntime, WasmRuntime};
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use std::path::PathBuf;
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use cretonne::loop_analysis::LoopAnalysis;
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use cretonne::flowgraph::ControlFlowGraph;
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use cretonne::dominator_tree::DominatorTree;
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use cretonne::Context;
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use cretonne::result::CtonError;
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use cretonne::ir;
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use cretonne::ir::entities::AnyEntity;
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use cretonne::isa::TargetIsa;
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use cretonne::verifier;
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use std::fs::File;
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use std::error::Error;
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use std::io;
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use std::io::BufReader;
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use std::io::prelude::*;
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use std::path::Path;
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use std::process::Command;
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use tempdir::TempDir;
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use term;
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macro_rules! vprintln {
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($x: expr, $($tts:tt)*) => {
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if $x {
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println!($($tts)*);
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}
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}
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}
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macro_rules! vprint {
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($x: expr, $($tts:tt)*) => {
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if $x {
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print!($($tts)*);
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}
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}
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}
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fn read_wasm_file(path: PathBuf) -> Result<Vec<u8>, io::Error> {
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let mut buf: Vec<u8> = Vec::new();
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let file = File::open(path)?;
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let mut buf_reader = BufReader::new(file);
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buf_reader.read_to_end(&mut buf)?;
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Ok(buf)
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}
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pub fn run(files: Vec<String>,
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flag_verbose: bool,
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flag_optimize: bool,
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flag_check: bool)
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-> Result<(), String> {
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for filename in files.iter() {
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let path = Path::new(&filename);
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let name = String::from(path.as_os_str().to_string_lossy());
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match handle_module(flag_verbose,
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flag_optimize,
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flag_check,
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path.to_path_buf(),
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name) {
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Ok(()) => {}
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Err(message) => return Err(message),
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}
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}
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Ok(())
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}
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fn handle_module(flag_verbose: bool,
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flag_optimize: bool,
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flag_check: bool,
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path: PathBuf,
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name: String)
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-> Result<(), String> {
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let mut terminal = term::stdout().unwrap();
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terminal.fg(term::color::YELLOW).unwrap();
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vprint!(flag_verbose, "Handling: ");
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terminal.reset().unwrap();
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vprintln!(flag_verbose, "\"{}\"", name);
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terminal.fg(term::color::MAGENTA).unwrap();
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vprint!(flag_verbose, "Translating...");
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terminal.reset().unwrap();
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let data = match path.extension() {
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None => {
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return Err(String::from("the file extension is not wasm or wast"));
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}
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Some(ext) => {
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match ext.to_str() {
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Some("wasm") => {
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match read_wasm_file(path.clone()) {
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Ok(data) => data,
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Err(err) => {
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return Err(String::from(err.description()));
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}
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}
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}
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Some("wast") => {
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let tmp_dir = TempDir::new("wasm2cretonne").unwrap();
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let file_path = tmp_dir.path().join("module.wasm");
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File::create(file_path.clone()).unwrap();
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Command::new("wast2wasm")
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.arg(path.clone())
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.arg("-o")
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.arg(file_path.to_str().unwrap())
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.output()
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.or_else(|e| if let io::ErrorKind::NotFound = e.kind() {
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return Err(String::from("wast2wasm not found"));
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} else {
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return Err(String::from(e.description()));
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})
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.unwrap();
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match read_wasm_file(file_path) {
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Ok(data) => data,
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Err(err) => {
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return Err(String::from(err.description()));
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}
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}
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}
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None | Some(&_) => {
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return Err(String::from("the file extension is not wasm or wast"));
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}
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}
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}
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};
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let mut dummy_runtime = DummyRuntime::new();
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let translation = {
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let mut runtime: &mut WasmRuntime = &mut dummy_runtime;
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match translate_module(&data, runtime) {
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Ok(x) => x,
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Err(string) => {
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return Err(string);
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}
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}
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};
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terminal.fg(term::color::GREEN).unwrap();
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vprintln!(flag_verbose, " ok");
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terminal.reset().unwrap();
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if flag_check {
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terminal.fg(term::color::MAGENTA).unwrap();
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vprint!(flag_verbose, "Checking... ");
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terminal.reset().unwrap();
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for func in translation.functions.iter() {
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let il = match func {
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&FunctionTranslation::Import() => continue,
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&FunctionTranslation::Code { ref il, .. } => il.clone(),
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};
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match verifier::verify_function(&il, None) {
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Ok(()) => (),
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Err(err) => return Err(pretty_verifier_error(&il, None, err)),
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}
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}
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terminal.fg(term::color::GREEN).unwrap();
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vprintln!(flag_verbose, " ok");
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terminal.reset().unwrap();
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}
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if flag_optimize {
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terminal.fg(term::color::MAGENTA).unwrap();
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vprint!(flag_verbose, "Optimizing... ");
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terminal.reset().unwrap();
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for func in translation.functions.iter() {
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let mut il = match func {
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&FunctionTranslation::Import() => continue,
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&FunctionTranslation::Code { ref il, .. } => il.clone(),
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};
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let mut loop_analysis = LoopAnalysis::new();
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let mut cfg = ControlFlowGraph::new();
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cfg.compute(&il);
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let mut domtree = DominatorTree::new();
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domtree.compute(&mut il, &cfg);
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loop_analysis.compute(&mut il, &mut cfg, &mut domtree);
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let mut context = Context::new();
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context.func = il;
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context.cfg = cfg;
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context.domtree = domtree;
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context.loop_analysis = loop_analysis;
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match verifier::verify_context(&context.func, &context.cfg, &context.domtree, None) {
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Ok(()) => (),
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Err(err) => {
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return Err(pretty_verifier_error(&context.func, None, err));
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}
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};
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match context.licm() {
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Ok(())=> (),
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Err(error) => {
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match error {
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CtonError::Verifier(err) => {
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return Err(pretty_verifier_error(&context.func, None, err));
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}
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CtonError::ImplLimitExceeded |
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CtonError::CodeTooLarge => return Err(String::from(error.description())),
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}
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}
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};
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match verifier::verify_context(&context.func, &context.cfg, &context.domtree, None) {
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Ok(()) => (),
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Err(err) => return Err(pretty_verifier_error(&context.func, None, err)),
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}
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}
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terminal.fg(term::color::GREEN).unwrap();
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vprintln!(flag_verbose, " ok");
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terminal.reset().unwrap();
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}
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Ok(())
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}
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/// Pretty-print a verifier error.
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pub fn pretty_verifier_error(func: &ir::Function,
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isa: Option<&TargetIsa>,
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err: verifier::Error)
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-> String {
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let msg = err.to_string();
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let str1 = match err.location {
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AnyEntity::Inst(inst) => {
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format!("{}\n{}: {}\n\n",
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msg,
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inst,
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func.dfg.display_inst(inst, isa))
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}
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_ => String::from(format!("{}\n", msg)),
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};
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format!("{}{}", str1, func.display(isa))
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}
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