cb48ea406e
This PR switches the default backend on x86, for both the `cranelift-codegen` crate and for Wasmtime, to the new (`MachInst`-style, `VCode`-based) backend that has been under development and testing for some time now. The old backend is still available by default in builds with the `old-x86-backend` feature, or by requesting `BackendVariant::Legacy` from the appropriate APIs. As part of that switch, it adds some more runtime-configurable plumbing to the testing infrastructure so that tests can be run using the appropriate backend. `clif-util test` is now capable of parsing a backend selector option from filetests and instantiating the correct backend. CI has been updated so that the old x86 backend continues to run its tests, just as we used to run the new x64 backend separately. At some point, we will remove the old x86 backend entirely, once we are satisfied that the new backend has not caused any unforeseen issues and we do not need to revert.
135 lines
4.1 KiB
Rust
135 lines
4.1 KiB
Rust
use super::dump::{get_dwarfdump, DwarfDumpSection};
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use super::obj::compile_cranelift;
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use anyhow::{format_err, Result};
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use filecheck::{CheckerBuilder, NO_VARIABLES};
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use std::fs::read;
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use tempfile::NamedTempFile;
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#[allow(dead_code)]
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fn check_wasm(wasm_path: &str, directives: &str) -> Result<()> {
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let wasm = read(wasm_path)?;
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let obj_file = NamedTempFile::new()?;
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let obj_path = obj_file.path().to_str().unwrap();
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compile_cranelift(&wasm, None, obj_path)?;
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let dump = get_dwarfdump(obj_path, DwarfDumpSection::DebugInfo)?;
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let mut builder = CheckerBuilder::new();
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builder
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.text(directives)
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.map_err(|e| format_err!("unable to build checker: {:?}", e))?;
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let checker = builder.finish();
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let check = checker
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.explain(&dump, NO_VARIABLES)
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.map_err(|e| format_err!("{:?}", e))?;
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assert!(check.0, "didn't pass check {}", check.1);
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Ok(())
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}
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#[allow(dead_code)]
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fn check_line_program(wasm_path: &str, directives: &str) -> Result<()> {
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let wasm = read(wasm_path)?;
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let obj_file = NamedTempFile::new()?;
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let obj_path = obj_file.path().to_str().unwrap();
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compile_cranelift(&wasm, None, obj_path)?;
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let dump = get_dwarfdump(obj_path, DwarfDumpSection::DebugLine)?;
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let mut builder = CheckerBuilder::new();
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builder
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.text(directives)
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.map_err(|e| format_err!("unable to build checker: {:?}", e))?;
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let checker = builder.finish();
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let check = checker
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.explain(&dump, NO_VARIABLES)
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.map_err(|e| format_err!("{:?}", e))?;
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assert!(check.0, "didn't pass check {}", check.1);
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Ok(())
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}
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#[test]
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#[ignore]
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#[cfg(all(
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any(target_os = "linux", target_os = "macos"),
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target_pointer_width = "64"
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))]
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fn test_debug_dwarf_translate() -> Result<()> {
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check_wasm(
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"tests/all/debug/testsuite/fib-wasm.wasm",
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r##"
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check: DW_TAG_compile_unit
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# We have "fib" function
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check: DW_TAG_subprogram
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check: DW_AT_name ("fib")
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# Accepts one parameter
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check: DW_TAG_formal_parameter
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check: DW_AT_name ("n")
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check: DW_AT_decl_line (8)
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# Has four locals: t, a, b, i
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check: DW_TAG_variable
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check: DW_AT_name ("t")
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check: DW_AT_decl_line (9)
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check: DW_TAG_variable
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check: DW_AT_name ("a")
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check: DW_TAG_variable
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check: DW_AT_name ("b")
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check: DW_TAG_variable
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check: DW_AT_name ("i")
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check: DW_AT_decl_line (10)
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"##,
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)
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}
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#[test]
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#[ignore]
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#[cfg(all(
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any(target_os = "linux", target_os = "macos"),
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target_pointer_width = "64"
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))]
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fn test_debug_dwarf5_translate() -> Result<()> {
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check_wasm(
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"tests/all/debug/testsuite/fib-wasm-dwarf5.wasm",
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r##"
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check: DW_TAG_compile_unit
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# We have "fib" function
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check: DW_TAG_subprogram
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check: DW_AT_name ("fib")
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# Accepts one parameter
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check: DW_TAG_formal_parameter
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check: DW_AT_name ("n")
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check: DW_AT_decl_line (8)
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# Has four locals: t, a, b, i
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check: DW_TAG_variable
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check: DW_AT_name ("t")
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check: DW_AT_decl_line (9)
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check: DW_TAG_variable
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check: DW_AT_name ("a")
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check: DW_TAG_variable
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check: DW_AT_name ("b")
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check: DW_TAG_variable
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check: DW_AT_name ("i")
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check: DW_AT_decl_line (10)
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"##,
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)
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}
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#[test]
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#[ignore]
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#[cfg(all(
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any(target_os = "linux", target_os = "macos"),
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target_arch = "x86_64",
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target_pointer_width = "64",
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// Ignore test on new backend. This is a specific test with hardcoded
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// offsets and the new backend compiles the return basic-block at a different
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// offset, causing mismatches.
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feature = "old-x86-backend",
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))]
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fn test_debug_dwarf5_translate_lines() -> Result<()> {
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check_line_program(
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"tests/all/debug/testsuite/fib-wasm-dwarf5.wasm",
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r##"
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check: Address Line Column File ISA Discriminator Flags
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check: 0x000000000000013c 15 3 1 0 0
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# The important point is that the following offset must be _after_ the `ret` instruction.
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# FIXME: this +1 increment might vary on other archs.
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nextln: 0x000000000000013d 15 3 1 0 0 end_sequence
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"##,
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)
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}
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