wasmer/lib/runtime/build/spectests.rs

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2019-01-09 04:50:37 +00:00
//! This file will run at build time to autogenerate Rust tests based on
//! WebAssembly spec tests. It will convert the files indicated in TESTS
//! from "/spectests/{MODULE}.wast" to "/src/spectests/{MODULE}.rs".
use std::collections::HashMap;
use std::fs;
use std::path::PathBuf;
use wabt::script::{Action, Command, CommandKind, ModuleBinary, ScriptParser, Value};
use wabt::wasm2wat;
static BANNER: &str = "// Rust test file autogenerated with cargo build (build/spectests.rs).
// Please do NOT modify it by hand, as it will be reset on next build.\n";
const TESTS: [&str; 60] = [
"tests/spectests/address.wast",
"tests/spectests/align.wast",
"tests/spectests/binary.wast",
"tests/spectests/block.wast",
"tests/spectests/br.wast",
"tests/spectests/br_if.wast",
"tests/spectests/br_table.wast",
"tests/spectests/break_drop.wast",
"tests/spectests/call.wast",
"tests/spectests/call_indirect.wast",
"tests/spectests/comments.wast",
"tests/spectests/const_.wast",
"tests/spectests/conversions.wast",
"tests/spectests/custom.wast",
"tests/spectests/data.wast",
"tests/spectests/elem.wast",
"tests/spectests/endianness.wast",
"tests/spectests/exports.wast",
"tests/spectests/f32_.wast",
"tests/spectests/f32_bitwise.wast",
"tests/spectests/f32_cmp.wast",
"tests/spectests/f64_.wast",
"tests/spectests/f64_bitwise.wast",
"tests/spectests/f64_cmp.wast",
"tests/spectests/fac.wast",
"tests/spectests/float_exprs.wast",
"tests/spectests/float_literals.wast",
"tests/spectests/float_memory.wast",
"tests/spectests/float_misc.wast",
"tests/spectests/forward.wast",
"tests/spectests/func.wast",
"tests/spectests/func_ptrs.wast",
"tests/spectests/get_local.wast",
"tests/spectests/globals.wast",
"tests/spectests/i32_.wast",
"tests/spectests/i64_.wast",
"tests/spectests/if_.wast",
"tests/spectests/int_exprs.wast",
"tests/spectests/int_literals.wast",
"tests/spectests/labels.wast",
"tests/spectests/left_to_right.wast",
"tests/spectests/loop_.wast",
"tests/spectests/memory.wast",
"tests/spectests/memory_grow.wast",
"tests/spectests/memory_redundancy.wast",
"tests/spectests/memory_trap.wast",
"tests/spectests/nop.wast",
"tests/spectests/return_.wast",
"tests/spectests/select.wast",
"tests/spectests/set_local.wast",
"tests/spectests/stack.wast",
"tests/spectests/start.wast",
"tests/spectests/store_retval.wast",
"tests/spectests/switch.wast",
"tests/spectests/tee_local.wast",
"tests/spectests/token.wast",
"tests/spectests/traps.wast",
"tests/spectests/typecheck.wast",
"tests/spectests/types.wast",
"tests/spectests/unwind.wast",
];
fn wabt2rust_type(v: &Value) -> String {
match v {
Value::I32(_v) => format!("i32"),
Value::I64(_v) => format!("i64"),
Value::F32(_v) => format!("f32"),
Value::F64(_v) => format!("f64"),
}
}
fn wabt2rust_type_destructure(v: &Value, placeholder: &str) -> String {
match v {
Value::I32(_v) => format!("Value::I32({})", placeholder),
Value::I64(_v) => format!("Value::I64({})", placeholder),
Value::F32(_v) => format!("Value::F32({})", placeholder),
Value::F64(_v) => format!("Value::F64({})", placeholder),
}
}
fn is_nan(v: &Value) -> bool {
if let Value::F32(v) = v {
return v.is_nan();
} else if let Value::F64(v) = v {
return v.is_nan();
}
return false;
}
fn wabt2rust_value_bare(v: &Value) -> String {
match v {
Value::I32(v) => format!("{:?} as i32", v),
Value::I64(v) => format!("{:?} as i64", v),
Value::F32(v) => {
if v.is_infinite() {
if v.is_sign_negative() {
"f32::NEG_INFINITY".to_string()
} else {
"f32::INFINITY".to_string()
}
} else if v.is_nan() {
// Support for non-canonical NaNs
format!("f32::from_bits({:?})", v.to_bits())
} else {
format!("{:?} as f32", v)
}
}
Value::F64(v) => {
if v.is_infinite() {
if v.is_sign_negative() {
"f64::NEG_INFINITY".to_string()
} else {
"f64::INFINITY".to_string()
}
} else if v.is_nan() {
format!("f64::from_bits({:?})", v.to_bits())
} else {
format!("{:?} as f64", v)
}
}
}
}
fn wabt2rust_value(v: &Value) -> String {
match v {
Value::I32(v) => format!("Value::I32({:?} as i32)", v),
Value::I64(v) => format!("Value::I64({:?} as i64)", v),
Value::F32(v) => {
if v.is_infinite() {
if v.is_sign_negative() {
"Value::F32(f32::NEG_INFINITY)".to_string()
} else {
"Value::F32(f32::INFINITY)".to_string()
}
} else if v.is_nan() {
// Support for non-canonical NaNs
format!("Value::F32(f32::from_bits({:?}) as u32)", v.to_bits())
} else {
format!("Value::F32(({:?}f32).to_bits())", v)
}
}
Value::F64(v) => {
if v.is_infinite() {
if v.is_sign_negative() {
"Value::F64(f64::NEG_INFINITY)".to_string()
} else {
"Value::F64(f64::INFINITY)".to_string()
}
} else if v.is_nan() {
format!("Value::F64(f64::from_bits({:?}) as u64)", v.to_bits())
} else {
format!("Value::F64(({:?}f64).to_bits())", v)
}
}
}
}
struct WastTestGenerator {
last_module: i32,
last_line: u64,
command_no: i32,
filename: String,
script_parser: ScriptParser,
module_calls: HashMap<i32, Vec<String>>,
buffer: String,
}
impl WastTestGenerator {
fn new(path: &PathBuf) -> Self {
let filename = path.file_name().unwrap().to_str().unwrap();
let source = fs::read(&path).unwrap();
let script: ScriptParser = ScriptParser::from_source_and_name(&source, filename).unwrap();
let buffer = String::new();
WastTestGenerator {
last_module: 0,
last_line: 0,
command_no: 0,
filename: filename.to_string(),
script_parser: script,
buffer: buffer,
module_calls: HashMap::new(),
}
}
fn consume(&mut self) {
self.buffer.push_str(BANNER);
self.buffer.push_str(&format!(
"// Test based on spectests/{}
#![allow(
warnings,
dead_code
)]
use wabt::wat2wasm;
use wasmer_runtime::types::Value;
use wasmer_runtime::{{Instance, Module}};
use wasmer_clif_backend::CraneliftCompiler;
use crate::_common::{{
spectest_importobject,
NaNCheck,
}};\n\n",
self.filename
));
while let Some(Command { line, kind }) = &self.script_parser.next().unwrap() {
self.last_line = line.clone();
self.buffer
.push_str(&format!("\n// Line {}\n", self.last_line));
self.visit_command(&kind);
self.command_no = self.command_no + 1;
}
for n in 1..self.last_module + 1 {
self.flush_module_calls(n);
}
}
fn command_name(&self) -> String {
format!("c{}_l{}", self.command_no, self.last_line)
}
fn flush_module_calls(&mut self, module: i32) {
let calls: Vec<String> = self
.module_calls
.entry(module)
.or_insert(Vec::new())
.iter()
.map(|call_str| format!("{}(&mut instance);", call_str))
.collect();
if calls.len() > 0 {
self.buffer.push_str(
format!(
"\n#[test]
fn test_module_{}() {{
let mut instance = create_module_{}();
// We group the calls together
{}
}}\n",
module,
module,
calls.join("\n ")
)
.as_str(),
);
}
self.module_calls.remove(&module);
}
fn visit_module(&mut self, module: &ModuleBinary, _name: &Option<String>) {
let wasm_binary: Vec<u8> = module.clone().into_vec();
let wast_string = wasm2wat(wasm_binary).expect("Can't convert back to wasm");
let last_module = self.last_module;
self.flush_module_calls(last_module);
self.last_module = self.last_module + 1;
// self.module_calls.insert(self.last_module, vec![]);
self.buffer.push_str(
format!(
"fn create_module_{}() -> Instance {{
let module_str = \"{}\";
let wasm_binary = wat2wasm(module_str.as_bytes()).expect(\"WAST not valid or malformed\");
let module = wasmer_runtime::compile(&wasm_binary[..], &CraneliftCompiler::new()).expect(\"WASM can't be compiled\");
module.instantiate(&spectest_importobject()).expect(\"WASM can't be instantiated\")
}}\n",
self.last_module,
// We do this to ident four spaces, so it looks aligned to the function body
wast_string
.replace("\n", "\n ")
.replace("\\", "\\\\")
.replace("\"", "\\\""),
)
.as_str(),
);
// We set the start call to the module
let start_module_call = format!("start_module_{}", self.last_module);
self.buffer.push_str(
format!(
"\nfn {}(instance: &mut Instance) {{
// TODO Review is explicit start needed? Start now called in runtime::Instance::new()
//instance.start();
}}\n",
start_module_call
)
.as_str(),
);
self.module_calls
.entry(self.last_module)
.or_insert(Vec::new())
.push(start_module_call);
}
fn visit_assert_invalid(&mut self, module: &ModuleBinary) {
let wasm_binary: Vec<u8> = module.clone().into_vec();
// let wast_string = wasm2wat(wasm_binary).expect("Can't convert back to wasm");
let command_name = self.command_name();
self.buffer.push_str(
format!(
"#[test]
fn {}_assert_invalid() {{
let wasm_binary = {:?};
let module = wasmer_runtime::compile(wasm_binary, &CraneliftCompiler::new());
assert!(module.is_err(), \"WASM should not compile as is invalid\");
}}\n",
command_name,
wasm_binary,
// We do this to ident four spaces back
// String::from_utf8_lossy(&wasm_binary),
// wast_string.replace("\n", "\n "),
)
.as_str(),
);
}
// TODO: Refactor repetitive code
fn visit_assert_return_arithmetic_nan(&mut self, action: &Action) {
match action {
Action::Invoke {
module: _,
field,
args,
} => {
let return_type = wabt2rust_type(&args[0]);
let func_return = format!(" -> {}", return_type);
let assertion = String::from("assert!(result.is_quiet_nan())");
// We map the arguments provided into the raw Arguments provided
// to libffi
let mut args_types: Vec<String> = args.iter().map(wabt2rust_type).collect();
// args_types.push("&Instance".to_string());
let mut args_values: Vec<String> = args.iter().map(wabt2rust_value).collect();
// args_values.push("&result_object.instance".to_string());
let func_name = format!("{}_assert_return_arithmetic_nan", self.command_name());
self.buffer.push_str(
format!(
"fn {func_name}(instance: &mut Instance) {{
println!(\"Executing function {{}}\", \"{func_name}\");
let result = instance.call(\"{field}\", &[{args_values}]).unwrap().expect(\"Missing result in {func_name}\");
{assertion}
}}\n",
func_name=func_name,
field=field,
args_values=args_values.join(", "),
assertion=assertion,
)
.as_str(),
);
// field=field,
// args_types=args_types.join(", "),
// func_return=func_return,
self.module_calls
.entry(self.last_module)
.or_insert(Vec::new())
.push(func_name);
// let mut module_calls = self.module_calls.get(&self.last_module).unwrap();
// module_calls.push(func_name);
}
_ => {}
};
}
// PROBLEM: Im assuming the return type from the first argument type
// and wabt does gives us the `expected` result
// TODO: Refactor repetitive code
fn visit_assert_return_canonical_nan(&mut self, action: &Action) {
match action {
Action::Invoke {
module: _,
field,
args,
} => {
let return_type = match &field.as_str() {
&"f64.promote_f32" => String::from("f64"),
&"f32.promote_f64" => String::from("f32"),
_ => wabt2rust_type(&args[0]),
};
let func_return = format!(" -> {}", return_type);
let assertion = String::from("assert!(result.is_quiet_nan())");
// We map the arguments provided into the raw Arguments provided
// to libffi
let mut args_types: Vec<String> = args.iter().map(wabt2rust_type).collect();
// args_types.push("&Instance".to_string());
let mut args_values: Vec<String> = args.iter().map(wabt2rust_value).collect();
// args_values.push("&result_object.instance".to_string());
let func_name = format!("{}_assert_return_canonical_nan", self.command_name());
self.buffer.push_str(
format!(
"fn {func_name}(instance: &mut Instance) {{
println!(\"Executing function {{}}\", \"{func_name}\");
let result = instance.call(\"{field}\", &[{args_values}]).unwrap().expect(\"Missing result in {func_name}\");
{assertion}
}}\n",
func_name=func_name,
field=field,
args_values=args_values.join(", "),
assertion=assertion,
)
.as_str(),
);
self.module_calls
.entry(self.last_module)
.or_insert(Vec::new())
.push(func_name);
// let mut module_calls = self.module_calls.get(&self.last_module).unwrap();
// module_calls.push(func_name);
}
_ => {}
};
}
fn visit_assert_malformed(&mut self, module: &ModuleBinary) {
let wasm_binary: Vec<u8> = module.clone().into_vec();
let command_name = self.command_name();
// let wast_string = wasm2wat(wasm_binary).expect("Can't convert back to wasm");
self.buffer.push_str(
format!(
"#[test]
fn {}_assert_malformed() {{
let wasm_binary = {:?};
let compilation = wasmer_runtime::compile(wasm_binary, &CraneliftCompiler::new());
assert!(compilation.is_err(), \"WASM should not compile as is malformed\");
}}\n",
command_name,
wasm_binary,
// We do this to ident four spaces back
// String::from_utf8_lossy(&wasm_binary),
// wast_string.replace("\n", "\n "),
)
.as_str(),
);
}
// TODO: Refactor repetitive code
fn visit_action(&mut self, action: &Action, expected: Option<&Vec<Value>>) -> Option<String> {
match action {
Action::Invoke {
module: _,
field,
args,
} => {
let (func_return, assertion) = match expected {
Some(expected) => {
let func_return = if expected.len() > 0 {
format!(" -> {}", wabt2rust_type(&expected[0]))
} else {
"".to_string()
};
let expected_result = if expected.len() > 0 {
wabt2rust_value_bare(&expected[0])
} else {
"should not use this expect result".to_string()
};
let expected_some_result = if expected.len() > 0 {
format!("Some({})", wabt2rust_value(&expected[0]))
} else {
"None".to_string()
};
let return_type = if expected.len() > 0 {
wabt2rust_type(&expected[0])
} else {
"should not use this return type".to_string()
};
let return_type_destructure = if expected.len() > 0 {
wabt2rust_type_destructure(&expected[0], "result")
} else {
"should not use this result return type destructure".to_string()
};
let expected_type_destructure = if expected.len() > 0 {
wabt2rust_type_destructure(&expected[0], "expected")
} else {
"should not use this expected return type destructure".to_string()
};
let assertion = if expected.len() > 0 && is_nan(&expected[0]) {
format!(
"let expected = {expected_result};
if let {return_type_destructure} = result.unwrap() {{
assert!((result as {return_type}).is_nan());
assert_eq!((result as {return_type}).is_sign_positive(), (expected as {return_type}).is_sign_positive());
}} else {{
panic!(\"Unexpected result type {{:?}}\", result);
}}",
expected_result=expected_result,
return_type=return_type,
return_type_destructure=return_type_destructure
)
} else {
format!("assert_eq!(result, {});", expected_some_result)
};
(func_return, assertion)
}
None => ("".to_string(), "".to_string()),
};
// We map the arguments provided into the raw Arguments provided
// to libffi
let mut args_types: Vec<String> = args.iter().map(wabt2rust_type).collect();
// args_types.push("&Instance".to_string());
let mut args_values: Vec<String> = args.iter().map(wabt2rust_value).collect();
// args_values.push("&result_object.instance".to_string());
let func_name = format!("{}_action_invoke", self.command_name());
self.buffer.push_str(
format!(
"fn {func_name}(instance: &mut Instance) -> Result<(), String> {{
println!(\"Executing function {{}}\", \"{func_name}\");
let result = instance.call(\"{field}\", &[{args_values}]).expect(\"Missing result in {func_name}\");
{assertion}
result.map(|_| ())
}}\n",
func_name=func_name,
field=field,
args_values=args_values.join(", "),
assertion=assertion,
)
.as_str(),
);
Some(func_name)
// let mut module_calls = self.module_calls.get(&self.last_module).unwrap();
// module_calls.push(func_name);
}
_ => None,
}
}
fn visit_assert_return(&mut self, action: &Action, expected: &Vec<Value>) {
let action_fn_name = self.visit_action(action, Some(expected));
if action_fn_name.is_none() {
return;
}
self.module_calls
.entry(self.last_module)
.or_insert(Vec::new())
.push(action_fn_name.unwrap());
}
fn visit_perform_action(&mut self, action: &Action) {
let action_fn_name = self.visit_action(action, None);
if action_fn_name.is_none() {
return;
}
self.module_calls
.entry(self.last_module)
.or_insert(Vec::new())
.push(action_fn_name.unwrap());
}
fn visit_assert_trap(&mut self, action: &Action) {
let action_fn_name = self.visit_action(action, None);
if action_fn_name.is_none() {
return;
}
let trap_func_name = format!("{}_assert_trap", self.command_name());
self.buffer.push_str(
format!(
"
#[test]
fn {}() {{
let mut instance = create_module_{}();
let result = {}(&mut instance);
assert!(result.is_err());
}}\n",
trap_func_name,
self.last_module,
action_fn_name.unwrap(),
)
.as_str(),
);
// We don't group trap calls as they may cause memory faults
// on the instance memory. So we test them alone.
// self.module_calls
// .entry(self.last_module)
// .or_insert(Vec::new())
// .push(trap_func_name);
}
fn visit_command(&mut self, cmd: &CommandKind) {
match cmd {
CommandKind::Module { module, name } => {
self.visit_module(module, name);
}
CommandKind::AssertReturn { action, expected } => {
self.visit_assert_return(action, expected)
}
CommandKind::AssertReturnCanonicalNan { action } => {
self.visit_assert_return_canonical_nan(action);
}
CommandKind::AssertReturnArithmeticNan { action } => {
self.visit_assert_return_arithmetic_nan(action);
}
CommandKind::AssertTrap { action, message: _ } => {
self.visit_assert_trap(action);
}
CommandKind::AssertInvalid { module, message: _ } => {
self.visit_assert_invalid(module);
}
CommandKind::AssertMalformed { module, message: _ } => {
self.visit_assert_malformed(module);
}
CommandKind::AssertUninstantiable {
module: _,
message: _,
} => {
// Do nothing for now
}
CommandKind::AssertExhaustion { action: _ } => {
// Do nothing for now
}
CommandKind::AssertUnlinkable {
module: _,
message: _,
} => {
// Do nothing for now
}
CommandKind::Register {
name: _,
as_name: _,
} => {
// Do nothing for now
}
CommandKind::PerformAction(action) => {
self.visit_perform_action(action);
}
}
}
fn finalize(&self) -> &String {
&self.buffer
}
}
fn wast_to_rust(wast_filepath: &str) -> (String, i32) {
let wast_filepath = format!("{}/{}", env!("CARGO_MANIFEST_DIR"), wast_filepath);
let path = PathBuf::from(&wast_filepath);
let script_name: String = String::from(path.file_stem().unwrap().to_str().unwrap());
let rust_test_filepath = format!(
concat!(env!("CARGO_MANIFEST_DIR"), "/tests/spectests/{}.rs"),
script_name.clone().as_str()
);
if script_name == "_common" {
panic!("_common is a reserved name for the _common module. Please use other name for the spectest.");
}
let wast_modified = fs::metadata(&wast_filepath)
.expect("Can't get wast file metadata")
.modified()
.expect("Can't get wast file modified date");
let _should_modify = match fs::metadata(&rust_test_filepath) {
Ok(m) => {
m.modified()
.expect("Can't get rust test file modified date")
< wast_modified
}
Err(_) => true,
};
// panic!("SOULD MODIFY {:?} {:?}", should_modify, rust_test_filepath);
// if true {
// should_modify
let mut generator = WastTestGenerator::new(&path);
generator.consume();
let generated_script = generator.finalize();
fs::write(&rust_test_filepath, generated_script.as_bytes()).unwrap();
// }
(script_name, generator.command_no)
}
pub fn build() {
let rust_test_modpath = concat!(env!("CARGO_MANIFEST_DIR"), "/tests/spectests/mod.rs");
let mut modules: Vec<String> = Vec::new();
// modules.reserve_exact(TESTS.len());
for test in TESTS.iter() {
let (module_name, number_commands) = wast_to_rust(test);
if number_commands > 200 {
modules.push(format!(
"#[cfg(not(feature = \"fast-tests\"))]
mod {};",
module_name
));
} else {
modules.push(format!("mod {};", module_name));
}
}
modules.insert(0, BANNER.to_string());
modules.insert(1, "// The _common module is not autogenerated, as it provides common functions for the spectests\nmod _common;".to_string());
// We add an empty line
modules.push("".to_string());
let modfile: String = modules.join("\n");
let source = fs::read(&rust_test_modpath).unwrap();
// We only modify the mod file if has changed
if source != modfile.as_bytes() {
fs::write(&rust_test_modpath, modfile.as_bytes()).unwrap();
}
}