6d50099816
* Rewrite interpreter generically This change re-implements the Cranelift interpreter to use generic values; this makes it possible to do abstract interpretation of Cranelift instructions. In doing so, the interpretation state is extracted from the `Interpreter` structure and is accessed via a `State` trait; this makes it possible to not only more clearly observe the interpreter's state but also to interpret using a dummy state (e.g. `ImmutableRegisterState`). This addition made it possible to implement more of the Cranelift instructions (~70%, ignoring the x86-specific instructions). * Replace macros with closures
65 lines
2.3 KiB
Rust
65 lines
2.3 KiB
Rust
//! Test command for interpreting CLIF files and verifying their results
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//!
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//! The `interpret` test command interprets each function on the host machine
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//! using [RunCommand](cranelift_reader::RunCommand)s.
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use crate::subtest::{Context, SubTest};
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use cranelift_codegen::{self, ir};
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use cranelift_interpreter::environment::FunctionStore;
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use cranelift_interpreter::interpreter::{Interpreter, InterpreterState};
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use cranelift_interpreter::step::ControlFlow;
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use cranelift_reader::{parse_run_command, TestCommand};
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use log::trace;
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use std::borrow::Cow;
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struct TestInterpret;
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pub fn subtest(parsed: &TestCommand) -> anyhow::Result<Box<dyn SubTest>> {
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assert_eq!(parsed.command, "interpret");
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if !parsed.options.is_empty() {
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anyhow::bail!("No options allowed on {}", parsed);
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}
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Ok(Box::new(TestInterpret))
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}
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impl SubTest for TestInterpret {
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fn name(&self) -> &'static str {
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"interpret"
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}
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fn is_mutating(&self) -> bool {
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false
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}
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fn needs_isa(&self) -> bool {
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false
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}
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fn run(&self, func: Cow<ir::Function>, context: &Context) -> anyhow::Result<()> {
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for comment in context.details.comments.iter() {
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if let Some(command) = parse_run_command(comment.text, &func.signature)? {
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trace!("Parsed run command: {}", command);
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let mut env = FunctionStore::default();
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env.add(func.name.to_string(), &func);
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command
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.run(|func_name, args| {
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// Because we have stored function names with a leading %, we need to re-add it.
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let func_name = &format!("%{}", func_name);
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let state = InterpreterState::default().with_function_store(env);
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match Interpreter::new(state).call_by_name(func_name, args) {
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Ok(ControlFlow::Return(results)) => Ok(results.to_vec()),
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Ok(_) => {
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panic!("Unexpected returned control flow--this is likely a bug.")
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}
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Err(t) => Err(format!("unexpected trap: {:?}", t)),
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}
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})
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.map_err(|e| anyhow::anyhow!("{}", e))?;
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}
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}
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Ok(())
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}
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}
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