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Initial reorg.

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This is largely the same as #305, but updated for the current tree.
This commit is contained in:
Dan Gohman
2019-11-07 17:11:06 -08:00
parent 2c69546a24
commit 22641de629
351 changed files with 52 additions and 52 deletions
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[package]
name = "wasmtime-wast"
version = "0.2.0"
authors = ["The Wasmtime Project Developers"]
description = "wast testing support for wasmtime"
categories = ["wasm"]
keywords = ["webassembly", "wasm"]
repository = "https://github.com/CraneStation/wasmtime"
license = "Apache-2.0 WITH LLVM-exception"
readme = "README.md"
edition = "2018"
[dependencies]
cranelift-codegen = { version = "0.49", features = ["enable-serde"] }
cranelift-entity = { version = "0.49", features = ["enable-serde"] }
cranelift-wasm = { version = "0.49", features = ["enable-serde"] }
wasmtime-jit = { path = "../jit" }
wasmtime-runtime = { path = "../runtime" }
wasmtime-environ = { path = "../environ" }
wast = "3.0.0"
anyhow = "1.0.19"
target-lexicon = "0.9.0"
[badges]
maintenance = { status = "experimental" }
travis-ci = { repository = "CraneStation/wasmtime" }
[features]
lightbeam = []

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This is the `wasmtime-wast` crate, which contains an implementation of WebAssembly's
"wast" test scripting language, which is used in the
[WebAssembly spec testsuite], using wasmtime for execution.
[WebAssembly spec testsuite]: https://github.com/WebAssembly/testsuite

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//! Implementation of the WAST text format for wasmtime.
#![deny(missing_docs, trivial_numeric_casts, unused_extern_crates)]
#![warn(unused_import_braces)]
#![deny(unstable_features)]
#![cfg_attr(feature = "clippy", plugin(clippy(conf_file = "../../clippy.toml")))]
#![cfg_attr(
feature = "cargo-clippy",
allow(clippy::new_without_default, clippy::new_without_default_derive)
)]
#![cfg_attr(
feature = "cargo-clippy",
warn(
clippy::float_arithmetic,
clippy::mut_mut,
clippy::nonminimal_bool,
clippy::option_map_unwrap_or,
clippy::option_map_unwrap_or_else,
clippy::print_stdout,
clippy::unicode_not_nfc,
clippy::use_self
)
)]
extern crate alloc;
mod spectest;
mod wast;
pub use crate::spectest::instantiate_spectest;
pub use crate::wast::WastContext;
/// Version number of this crate.
pub const VERSION: &str = env!("CARGO_PKG_VERSION");

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use alloc::rc::Rc;
use core::cell::RefCell;
use cranelift_codegen::ir::types;
use cranelift_codegen::{ir, isa};
use cranelift_entity::PrimaryMap;
use cranelift_wasm::{DefinedFuncIndex, Global, GlobalInit, Memory, Table, TableElementType};
use std::collections::hash_map::HashMap;
use target_lexicon::HOST;
use wasmtime_environ::{translate_signature, Export, MemoryPlan, Module, TablePlan};
use wasmtime_jit::target_tunables;
use wasmtime_runtime::{Imports, InstanceHandle, InstantiationError, VMContext, VMFunctionBody};
extern "C" fn spectest_print() {}
#[allow(clippy::print_stdout)]
extern "C" fn spectest_print_i32(_vmctx: &mut VMContext, x: i32) {
println!("{}: i32", x);
}
#[allow(clippy::print_stdout)]
extern "C" fn spectest_print_i64(_vmctx: &mut VMContext, x: i64) {
println!("{}: i64", x);
}
#[allow(clippy::print_stdout)]
extern "C" fn spectest_print_f32(_vmctx: &mut VMContext, x: f32) {
println!("{}: f32", x);
}
#[allow(clippy::print_stdout)]
extern "C" fn spectest_print_f64(_vmctx: &mut VMContext, x: f64) {
println!("{}: f64", x);
}
#[allow(clippy::print_stdout)]
extern "C" fn spectest_print_i32_f32(_vmctx: &mut VMContext, x: i32, y: f32) {
println!("{}: i32", x);
println!("{}: f32", y);
}
#[allow(clippy::print_stdout)]
extern "C" fn spectest_print_f64_f64(_vmctx: &mut VMContext, x: f64, y: f64) {
println!("{}: f64", x);
println!("{}: f64", y);
}
/// Return an instance implementing the "spectest" interface used in the
/// spec testsuite.
pub fn instantiate_spectest() -> Result<InstanceHandle, InstantiationError> {
let call_conv = isa::CallConv::triple_default(&HOST);
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 sig = module.signatures.push(translate_signature(
ir::Signature {
params: vec![],
returns: vec![],
call_conv,
},
pointer_type,
));
let func = module.functions.push(sig);
module
.exports
.insert("print".to_owned(), Export::Function(func));
finished_functions.push(spectest_print as *const VMFunctionBody);
let sig = module.signatures.push(translate_signature(
ir::Signature {
params: vec![ir::AbiParam::new(types::I32)],
returns: vec![],
call_conv,
},
pointer_type,
));
let func = module.functions.push(sig);
module
.exports
.insert("print_i32".to_owned(), Export::Function(func));
finished_functions.push(spectest_print_i32 as *const VMFunctionBody);
let sig = module.signatures.push(translate_signature(
ir::Signature {
params: vec![ir::AbiParam::new(types::I64)],
returns: vec![],
call_conv,
},
pointer_type,
));
let func = module.functions.push(sig);
module
.exports
.insert("print_i64".to_owned(), Export::Function(func));
finished_functions.push(spectest_print_i64 as *const VMFunctionBody);
let sig = module.signatures.push(translate_signature(
ir::Signature {
params: vec![ir::AbiParam::new(types::F32)],
returns: vec![],
call_conv,
},
pointer_type,
));
let func = module.functions.push(sig);
module
.exports
.insert("print_f32".to_owned(), Export::Function(func));
finished_functions.push(spectest_print_f32 as *const VMFunctionBody);
let sig = module.signatures.push(translate_signature(
ir::Signature {
params: vec![ir::AbiParam::new(types::F64)],
returns: vec![],
call_conv,
},
pointer_type,
));
let func = module.functions.push(sig);
module
.exports
.insert("print_f64".to_owned(), Export::Function(func));
finished_functions.push(spectest_print_f64 as *const VMFunctionBody);
let sig = module.signatures.push(translate_signature(
ir::Signature {
params: vec![ir::AbiParam::new(types::I32), ir::AbiParam::new(types::F32)],
returns: vec![],
call_conv,
},
pointer_type,
));
let func = module.functions.push(sig);
module
.exports
.insert("print_i32_f32".to_owned(), Export::Function(func));
finished_functions.push(spectest_print_i32_f32 as *const VMFunctionBody);
let sig = module.signatures.push(translate_signature(
ir::Signature {
params: vec![ir::AbiParam::new(types::F64), ir::AbiParam::new(types::F64)],
returns: vec![],
call_conv,
},
pointer_type,
));
let func = module.functions.push(sig);
module
.exports
.insert("print_f64_f64".to_owned(), Export::Function(func));
finished_functions.push(spectest_print_f64_f64 as *const VMFunctionBody);
let global = module.globals.push(Global {
ty: types::I32,
mutability: false,
initializer: GlobalInit::I32Const(666),
});
module
.exports
.insert("global_i32".to_owned(), Export::Global(global));
let global = module.globals.push(Global {
ty: types::I64,
mutability: false,
initializer: GlobalInit::I64Const(666),
});
module
.exports
.insert("global_i64".to_owned(), Export::Global(global));
let global = module.globals.push(Global {
ty: types::F32,
mutability: false,
initializer: GlobalInit::F32Const(0x44268000),
});
module
.exports
.insert("global_f32".to_owned(), Export::Global(global));
let global = module.globals.push(Global {
ty: types::F64,
mutability: false,
initializer: GlobalInit::F64Const(0x4084d00000000000),
});
module
.exports
.insert("global_f64".to_owned(), Export::Global(global));
let tunables = target_tunables(&HOST);
let table = module.table_plans.push(TablePlan::for_table(
Table {
ty: TableElementType::Func,
minimum: 10,
maximum: Some(20),
},
&tunables,
));
module
.exports
.insert("table".to_owned(), Export::Table(table));
let memory = module.memory_plans.push(MemoryPlan::for_memory(
Memory {
minimum: 1,
maximum: Some(2),
shared: false,
},
&tunables,
));
module
.exports
.insert("memory".to_owned(), Export::Memory(memory));
let imports = Imports::none();
let data_initializers = Vec::new();
let signatures = PrimaryMap::new();
InstanceHandle::new(
Rc::new(module),
Rc::new(RefCell::new(HashMap::new())),
finished_functions.into_boxed_slice(),
imports,
&data_initializers,
signatures.into_boxed_slice(),
None,
Box::new(()),
)
}

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use crate::spectest::instantiate_spectest;
use anyhow::{bail, Context as _, Result};
use std::path::Path;
use std::str;
use wasmtime_jit::{
ActionError, ActionOutcome, Compiler, Context, Features, InstanceHandle, InstantiationError,
RuntimeValue, SetupError,
};
/// Translate from a `script::Value` to a `RuntimeValue`.
fn runtime_value(v: &wast::Expression<'_>) -> RuntimeValue {
use wast::Instruction::*;
if v.instrs.len() != 1 {
panic!("too many instructions in {:?}", v);
}
match &v.instrs[0] {
I32Const(x) => RuntimeValue::I32(*x),
I64Const(x) => RuntimeValue::I64(*x),
F32Const(x) => RuntimeValue::F32(x.bits),
F64Const(x) => RuntimeValue::F64(x.bits),
V128Const(x) => RuntimeValue::V128(x.to_le_bytes()),
other => panic!("couldn't convert {:?} to a runtime value", other),
}
}
/// The wast test script language allows modules to be defined and actions
/// to be performed on them.
pub struct WastContext {
/// Wast files have a concept of a "current" module, which is the most
/// recently defined.
current: Option<InstanceHandle>,
context: Context,
}
impl WastContext {
/// Construct a new instance of `WastContext`.
pub fn new(compiler: Box<Compiler>) -> Self {
Self {
current: None,
context: Context::new(compiler),
}
}
/// Construct a new instance with the given features using the current `Context`
pub fn with_features(self, features: Features) -> Self {
Self {
context: self.context.with_features(features),
..self
}
}
fn get_instance(&mut self, instance_name: Option<&str>) -> Result<&mut InstanceHandle> {
let instance = if let Some(instance_name) = instance_name {
self.context
.get_instance(instance_name)
.context("failed to fetch instance")?
} else {
self.current
.as_mut()
.ok_or_else(|| anyhow::format_err!("no current instance"))?
};
Ok(instance)
}
/// Register "spectest" which is used by the spec testsuite.
pub fn register_spectest(&mut self) -> Result<()> {
let instance = instantiate_spectest()?;
self.context.name_instance("spectest".to_owned(), instance);
Ok(())
}
/// Perform the action portion of a command.
fn perform_execute(&mut self, exec: wast::WastExecute<'_>) -> Result<ActionOutcome> {
match exec {
wast::WastExecute::Invoke(invoke) => self.perform_invoke(invoke),
wast::WastExecute::Module(mut module) => {
let binary = module.encode()?;
let result = self.context.instantiate_module(None, &binary);
match result {
Ok(_) => Ok(ActionOutcome::Returned { values: Vec::new() }),
Err(ActionError::Setup(SetupError::Instantiate(
InstantiationError::StartTrap(message),
))) => Ok(ActionOutcome::Trapped { message }),
Err(e) => Err(e.into()),
}
}
wast::WastExecute::Get { module, global } => self.get(module.map(|s| s.name()), global),
}
}
fn perform_invoke(&mut self, exec: wast::WastInvoke<'_>) -> Result<ActionOutcome> {
self.invoke(exec.module.map(|i| i.name()), exec.name, &exec.args)
}
/// Define a module and register it.
fn module(&mut self, instance_name: Option<&str>, module: &[u8]) -> Result<()> {
let index = self
.context
.instantiate_module(instance_name.map(|s| s.to_string()), module)?;
self.current = Some(index);
Ok(())
}
/// Register an instance to make it available for performing actions.
fn register(&mut self, name: Option<&str>, as_name: &str) -> Result<()> {
let instance = self.get_instance(name)?.clone();
self.context.name_instance(as_name.to_string(), instance);
Ok(())
}
/// Invoke an exported function from an instance.
fn invoke(
&mut self,
instance_name: Option<&str>,
field: &str,
args: &[wast::Expression],
) -> Result<ActionOutcome> {
let value_args = args.iter().map(runtime_value).collect::<Vec<_>>();
let mut instance = self.get_instance(instance_name)?.clone();
let result = self
.context
.invoke(&mut instance, field, &value_args)
.with_context(|| format!("failed to invoke `{}`", field))?;
Ok(result)
}
/// Get the value of an exported global from an instance.
fn get(&mut self, instance_name: Option<&str>, field: &str) -> Result<ActionOutcome> {
let instance = self
.get_instance(instance_name.as_ref().map(|x| &**x))?
.clone();
let result = self
.context
.get(&instance, field)
.with_context(|| format!("failed to get field `{}`", field))?;
Ok(result)
}
/// Run a wast script from a byte buffer.
pub fn run_buffer(&mut self, filename: &str, wast: &[u8]) -> Result<()> {
use wast::WastDirective::*;
let wast = str::from_utf8(wast)?;
let adjust_wast = |mut err: wast::Error| {
err.set_path(filename.as_ref());
err.set_text(wast);
err
};
let context = |sp: wast::Span| {
let (line, col) = sp.linecol_in(wast);
format!("for directive on {}:{}:{}", filename, line, col)
};
let buf = wast::parser::ParseBuffer::new(wast).map_err(adjust_wast)?;
let wast = wast::parser::parse::<wast::Wast>(&buf).map_err(adjust_wast)?;
for directive in wast.directives {
match directive {
Module(mut module) => {
let binary = module.encode().map_err(adjust_wast)?;
self.module(module.name.map(|s| s.name()), &binary)
.with_context(|| context(module.span))?;
}
Register { span, name, module } => {
self.register(module.map(|s| s.name()), name)
.with_context(|| context(span))?;
}
Invoke(i) => {
let span = i.span;
self.perform_invoke(i).with_context(|| context(span))?;
}
AssertReturn {
span,
exec,
results,
} => match self.perform_execute(exec).with_context(|| context(span))? {
ActionOutcome::Returned { values } => {
for (v, e) in values.iter().zip(results.iter().map(runtime_value)) {
if *v == e {
continue;
}
bail!("{}\nexpected {}, got {}", context(span), e, v)
}
}
ActionOutcome::Trapped { message } => {
bail!("{}\nunexpected trap: {}", context(span), message)
}
},
AssertTrap {
span,
exec,
message,
} => match self.perform_execute(exec).with_context(|| context(span))? {
ActionOutcome::Returned { values } => {
bail!("{}\nexpected trap, got {:?}", context(span), values)
}
ActionOutcome::Trapped {
message: trap_message,
} => {
if trap_message.contains(message) {
continue;
}
if cfg!(feature = "lightbeam") {
println!(
"{}\nTODO: Check the assert_trap message: {}",
context(span),
message
);
continue;
}
bail!(
"{}\nexpected {}, got {}",
context(span),
message,
trap_message
)
}
},
AssertExhaustion {
span,
call,
message,
} => match self.perform_invoke(call).with_context(|| context(span))? {
ActionOutcome::Returned { values } => {
bail!("{}\nexpected trap, got {:?}", context(span), values)
}
ActionOutcome::Trapped {
message: trap_message,
} => {
if trap_message.contains(message) {
continue;
}
bail!(
"{}\nexpected exhaustion with {}, got {}",
context(span),
message,
trap_message
)
}
},
AssertReturnCanonicalNan { span, invoke } => {
match self.perform_invoke(invoke).with_context(|| context(span))? {
ActionOutcome::Returned { values } => {
for v in values.iter() {
match v {
RuntimeValue::I32(_) | RuntimeValue::I64(_) => {
bail!("{}\nunexpected integer in NaN test", context(span))
}
RuntimeValue::V128(_) => {
bail!("{}\nunexpected vector in NaN test", context(span))
}
RuntimeValue::F32(x) => {
if (x & 0x7fffffff) != 0x7fc00000 {
bail!("{}\nexpected canonical NaN", context(span))
}
}
RuntimeValue::F64(x) => {
if (x & 0x7fffffffffffffff) != 0x7ff8000000000000 {
bail!("{}\nexpected canonical NaN", context(span))
}
}
};
}
}
ActionOutcome::Trapped { message } => {
bail!("{}\nunexpected trap: {}", context(span), message)
}
}
}
AssertReturnArithmeticNan { span, invoke } => {
match self.perform_invoke(invoke).with_context(|| context(span))? {
ActionOutcome::Returned { values } => {
for v in values.iter() {
match v {
RuntimeValue::I32(_) | RuntimeValue::I64(_) => {
bail!("{}\nunexpected integer in NaN test", context(span))
}
RuntimeValue::V128(_) => {
bail!("{}\nunexpected vector in NaN test", context(span))
}
RuntimeValue::F32(x) => {
if (x & 0x00400000) != 0x00400000 {
bail!("{}\nexpected arithmetic NaN", context(span))
}
}
RuntimeValue::F64(x) => {
if (x & 0x0008000000000000) != 0x0008000000000000 {
bail!("{}\nexpected arithmetic NaN", context(span))
}
}
};
}
}
ActionOutcome::Trapped { message } => {
bail!("{}\nunexpected trap: {}", context(span), message)
}
}
}
AssertInvalid {
span,
mut module,
message,
} => {
let bytes = module.encode().map_err(adjust_wast)?;
let err = match self.module(None, &bytes) {
Ok(()) => bail!("{}\nexpected module to fail to build", context(span)),
Err(e) => e,
};
let error_message = err.to_string();
if !error_message.contains(&message) {
// TODO: change to bail!
println!(
"{}\nassert_invalid: expected {}, got {}",
context(span),
message,
error_message
)
}
}
AssertMalformed {
span,
module,
message,
} => {
let mut module = match module {
wast::QuoteModule::Module(m) => m,
// this is a `*.wat` parser test which we're not
// interested in
wast::QuoteModule::Quote(_) => return Ok(()),
};
let bytes = module.encode().map_err(adjust_wast)?;
let err = match self.module(None, &bytes) {
Ok(()) => {
bail!("{}\nexpected module to fail to instantiate", context(span))
}
Err(e) => e,
};
let error_message = err.to_string();
if !error_message.contains(&message) {
// TODO: change to bail!
println!(
"{}\nassert_malformed: expected {}, got {}",
context(span),
message,
error_message
)
}
}
AssertUnlinkable {
span,
mut module,
message,
} => {
let bytes = module.encode().map_err(adjust_wast)?;
let err = match self.module(None, &bytes) {
Ok(()) => bail!("{}\nexpected module to fail to link", context(span)),
Err(e) => e,
};
let error_message = err.to_string();
if !error_message.contains(&message) {
bail!(
"{}\nassert_unlinkable: expected {}, got {}",
context(span),
message,
error_message
)
}
}
AssertReturnFunc { .. } => panic!("need to implement assert_return_func"),
}
}
Ok(())
}
/// Run a wast script from a file.
pub fn run_file(&mut self, path: &Path) -> Result<()> {
let bytes =
std::fs::read(path).with_context(|| format!("failed to read `{}`", path.display()))?;
self.run_buffer(path.to_str().unwrap(), &bytes)
}
}