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Merge pull request #2141 from bytecodealliance/pch/cranelift_faerie_deprecated

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delete cranelift-faerie
This commit is contained in:
Pat Hickey
2020-08-18 13:00:32 -07:00
committed by GitHub
parent 924782191b 35c100fdca
commit 81b3450114
12 changed files with 0 additions and 899 deletions
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54
Cargo.lock generated
View File

@@ -414,18 +414,6 @@ dependencies = [
"serde",
]
[[package]]
name = "cranelift-faerie"
version = "0.66.0"
dependencies = [
"anyhow",
"cranelift-codegen",
"cranelift-module",
"faerie",
"goblin",
"target-lexicon",
]
[[package]]
name = "cranelift-filetests"
version = "0.66.0"
@@ -561,7 +549,6 @@ dependencies = [
"cranelift",
"cranelift-codegen",
"cranelift-entity",
"cranelift-faerie",
"cranelift-filetests",
"cranelift-frontend",
"cranelift-interpreter",
@@ -825,21 +812,6 @@ version = "0.0.0"
name = "example-wasi-wasm"
version = "0.0.0"
[[package]]
name = "faerie"
version = "0.15.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "dfef65b0e94693295c5d2fe2506f0ee6f43465342d4b5331659936aee8b16084"
dependencies = [
"goblin",
"indexmap",
"log",
"scroll",
"string-interner",
"target-lexicon",
"thiserror",
]
[[package]]
name = "fake-simd"
version = "0.1.2"
@@ -951,17 +923,6 @@ version = "0.3.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "9b919933a397b79c37e33b77bb2aa3dc8eb6e165ad809e58ff75bc7db2e34574"
[[package]]
name = "goblin"
version = "0.1.3"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "3081214398d39e4bd7f2c1975f0488ed04614ffdd976c6fc7a0708278552c0da"
dependencies = [
"log",
"plain",
"scroll",
]
[[package]]
name = "hashbrown"
version = "0.6.3"
@@ -1384,12 +1345,6 @@ dependencies = [
name = "peepmatic-traits"
version = "0.66.0"
[[package]]
name = "plain"
version = "0.2.3"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "b4596b6d070b27117e987119b4dac604f3c58cfb0b191112e24771b2faeac1a6"
[[package]]
name = "ppv-lite86"
version = "0.2.8"
@@ -1962,15 +1917,6 @@ version = "0.10.2"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "4fbd8c65873d2e06991c33399d5e4bccba6ba04743fe99e9656afa0c64137d2c"
[[package]]
name = "string-interner"
version = "0.7.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "fd710eadff449a1531351b0e43eb81ea404336fa2f56c777427ab0e32a4cf183"
dependencies = [
"serde",
]
[[package]]
name = "strsim"
version = "0.8.0"

1
cranelift/Cargo.toml
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@@ -25,7 +25,6 @@ cranelift-wasm = { path = "wasm", version = "0.66.0", optional = true }
cranelift-native = { path = "native", version = "0.66.0" }
cranelift-filetests = { path = "filetests", version = "0.66.0" }
cranelift-module = { path = "module", version = "0.66.0" }
cranelift-faerie = { path = "faerie", version = "0.66.0" }
cranelift-object = { path = "object", version = "0.66.0" }
cranelift-simplejit = { path = "simplejit", version = "0.66.0" }
cranelift-preopt = { path = "preopt", version = "0.66.0" }

5
cranelift/docs/index.md
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@@ -52,11 +52,6 @@
emits native object files using the
`object <https://github.com/gimli-rs/object>`_ library.
- [cranelift-faerie](https://docs.rs/cranelift-faerie)
This crate provides a faerie-based backend for `cranelift-module`, which
emits native object files using the
`faerie <https://github.com/m4b/faerie>`_ library.
- [cranelift-simplejit](https://docs.rs/cranelift-simplejit)
This crate provides a simple JIT backend for `cranelift-module`, which
emits code and data into memory.

21
cranelift/faerie/Cargo.toml
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@@ -1,21 +0,0 @@
[package]
name = "cranelift-faerie"
version = "0.66.0"
authors = ["The Cranelift Project Developers"]
description = "Emit Cranelift output to native object files with Faerie"
repository = "https://github.com/bytecodealliance/wasmtime"
documentation = "https://docs.rs/cranelift-faerie"
license = "Apache-2.0 WITH LLVM-exception"
readme = "README.md"
edition = "2018"
[dependencies]
cranelift-module = { path = "../module", version = "0.66.0" }
cranelift-codegen = { path = "../codegen", version = "0.66.0", default-features = false, features = ["std"] }
faerie = "0.15.0"
goblin = "0.1.0"
anyhow = "1.0"
target-lexicon = "0.10"
[badges]
maintenance = { status = "experimental" }

220
cranelift/faerie/LICENSE
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@@ -1,220 +0,0 @@
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9
cranelift/faerie/README.md
View File

@@ -1,9 +0,0 @@
This crate contains a library that enables
[Cranelift](https://crates.io/crates/cranelift)
to emit native object (".o") files, using the
[Faerie](https://crates.io/crates/faerie) library.
DEPRECATION NOTICE: the Cranelift developer team intends to stop maintaining
the `cranelift-faerie` crate and remove it from the `wasmtime` git repository
on or after August 3, 2020. We recommend users use its successor, the
`cranelift-object` crate.

482
cranelift/faerie/src/backend.rs
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@@ -1,482 +0,0 @@
//! Defines `FaerieBackend`.
use crate::container;
use anyhow::anyhow;
use cranelift_codegen::binemit::{
Addend, CodeOffset, NullStackMapSink, Reloc, RelocSink, StackMap, StackMapSink, TrapSink,
};
use cranelift_codegen::isa::TargetIsa;
use cranelift_codegen::{self, binemit, ir};
use cranelift_module::{
Backend, DataContext, DataDescription, DataId, FuncId, Init, Linkage, ModuleError,
ModuleNamespace, ModuleResult,
};
use faerie;
use std::convert::TryInto;
use std::fs::File;
use target_lexicon::Triple;
/// A builder for `FaerieBackend`.
pub struct FaerieBuilder {
isa: Box<dyn TargetIsa>,
name: String,
libcall_names: Box<dyn Fn(ir::LibCall) -> String>,
}
impl FaerieBuilder {
/// Create a new `FaerieBuilder` using the given Cranelift target, that
/// can be passed to
/// [`Module::new`](cranelift_module::Module::new)
///
/// Faerie output requires that TargetIsa have PIC (Position Independent Code) enabled.
///
/// The `libcall_names` function provides a way to translate `cranelift_codegen`'s `ir::LibCall`
/// enum to symbols. LibCalls are inserted in the IR as part of the legalization for certain
/// floating point instructions, and for stack probes. If you don't know what to use for this
/// argument, use `cranelift_module::default_libcall_names()`.
#[deprecated(
since = "0.65.0",
note = "the Cranelift developer team intends to stop maintaining the `cranelift-faerie`
crate and remove it from the `wasmtime` git repository on or after August 3, 2020. We
recommend users use its successor, the `cranelift-object` crate."
)]
pub fn new(
isa: Box<dyn TargetIsa>,
name: String,
libcall_names: Box<dyn Fn(ir::LibCall) -> String>,
) -> ModuleResult<Self> {
if !isa.flags().is_pic() {
return Err(ModuleError::Backend(anyhow!(
"faerie requires TargetIsa be PIC"
)));
}
Ok(Self {
isa,
name,
libcall_names,
})
}
}
/// A `FaerieBackend` implements `Backend` and emits ".o" files using the `faerie` library.
///
/// See the `FaerieBuilder` for a convenient way to construct `FaerieBackend` instances.
pub struct FaerieBackend {
isa: Box<dyn TargetIsa>,
artifact: faerie::Artifact,
libcall_names: Box<dyn Fn(ir::LibCall) -> String>,
}
pub struct FaerieCompiledFunction {
code_length: u32,
}
impl FaerieCompiledFunction {
pub fn code_length(&self) -> u32 {
self.code_length
}
}
pub struct FaerieCompiledData {}
impl Backend for FaerieBackend {
type Builder = FaerieBuilder;
type CompiledFunction = FaerieCompiledFunction;
type CompiledData = FaerieCompiledData;
// There's no need to return individual artifacts; we're writing them into
// the output file instead.
type FinalizedFunction = ();
type FinalizedData = ();
/// The returned value here provides functions for emitting object files
/// to memory and files.
type Product = FaerieProduct;
/// Create a new `FaerieBackend` using the given Cranelift target.
fn new(builder: FaerieBuilder) -> Self {
Self {
artifact: faerie::Artifact::new(builder.isa.triple().clone(), builder.name),
isa: builder.isa,
libcall_names: builder.libcall_names,
}
}
fn isa(&self) -> &dyn TargetIsa {
&*self.isa
}
fn declare_function(&mut self, _id: FuncId, name: &str, linkage: Linkage) {
self.artifact
.declare(name, translate_function_linkage(linkage))
.expect("inconsistent declarations");
}
fn declare_data(
&mut self,
_id: DataId,
name: &str,
linkage: Linkage,
writable: bool,
tls: bool,
align: Option<u8>,
) {
assert!(!tls, "Faerie doesn't yet support TLS");
self.artifact
.declare(name, translate_data_linkage(linkage, writable, align))
.expect("inconsistent declarations");
}
fn define_function<TS>(
&mut self,
_id: FuncId,
name: &str,
ctx: &cranelift_codegen::Context,
namespace: &ModuleNamespace<Self>,
total_size: u32,
trap_sink: &mut TS,
) -> ModuleResult<FaerieCompiledFunction>
where
TS: TrapSink,
{
let mut code: Vec<u8> = vec![0; total_size as usize];
// TODO: Replace this with FaerieStackMapSink once it is implemented.
let mut stack_map_sink = NullStackMapSink {};
// Non-lexical lifetimes would obviate the braces here.
{
let mut reloc_sink = FaerieRelocSink {
triple: self.isa.triple().clone(),
artifact: &mut self.artifact,
name,
namespace,
libcall_names: &*self.libcall_names,
};
unsafe {
ctx.emit_to_memory(
&*self.isa,
code.as_mut_ptr(),
&mut reloc_sink,
trap_sink,
&mut stack_map_sink,
)
};
}
// because `define` will take ownership of code, this is our last chance
let code_length = code.len() as u32;
self.artifact
.define(name, code)
.expect("inconsistent declaration");
Ok(FaerieCompiledFunction { code_length })
}
fn define_function_bytes(
&mut self,
_id: FuncId,
name: &str,
bytes: &[u8],
_namespace: &ModuleNamespace<Self>,
) -> ModuleResult<FaerieCompiledFunction> {
let code_length: u32 = match bytes.len().try_into() {
Ok(code_length) => code_length,
_ => Err(ModuleError::FunctionTooLarge(name.to_string()))?,
};
self.artifact
.define(name, bytes.to_vec())
.expect("inconsistent declaration");
Ok(FaerieCompiledFunction { code_length })
}
fn define_data(
&mut self,
_id: DataId,
name: &str,
_writable: bool,
tls: bool,
_align: Option<u8>,
data_ctx: &DataContext,
namespace: &ModuleNamespace<Self>,
) -> ModuleResult<FaerieCompiledData> {
assert!(!tls, "Faerie doesn't yet support TLS");
let &DataDescription {
ref init,
ref function_decls,
ref data_decls,
ref function_relocs,
ref data_relocs,
ref custom_segment_section,
} = data_ctx.description();
if let Some((segment, section)) = custom_segment_section {
return Err(cranelift_module::ModuleError::Backend(anyhow::anyhow!(
"Custom section not supported by cranelift-faerie: `{}:{}`",
segment,
section
)));
}
for &(offset, id) in function_relocs {
let to = &namespace.get_function_decl(&function_decls[id]).name;
self.artifact
.link(faerie::Link {
from: name,
to,
at: u64::from(offset),
})
.map_err(|e| ModuleError::Backend(e.into()))?;
}
for &(offset, id, addend) in data_relocs {
debug_assert_eq!(
addend, 0,
"faerie doesn't support addends in data section relocations yet"
);
let to = &namespace.get_data_decl(&data_decls[id]).name;
self.artifact
.link(faerie::Link {
from: name,
to,
at: u64::from(offset),
})
.map_err(|e| ModuleError::Backend(e.into()))?;
}
match *init {
Init::Uninitialized => {
panic!("data is not initialized yet");
}
Init::Zeros { size } => {
self.artifact
.define_zero_init(name, size)
.expect("inconsistent declaration");
}
Init::Bytes { ref contents } => {
self.artifact
.define(name, contents.to_vec())
.expect("inconsistent declaration");
}
}
Ok(FaerieCompiledData {})
}
fn write_data_funcaddr(
&mut self,
_data: &mut FaerieCompiledData,
_offset: usize,
_what: ir::FuncRef,
) {
unimplemented!()
}
fn write_data_dataaddr(
&mut self,
_data: &mut FaerieCompiledData,
_offset: usize,
_what: ir::GlobalValue,
_usize: binemit::Addend,
) {
unimplemented!()
}
fn finalize_function(
&mut self,
_id: FuncId,
_func: &FaerieCompiledFunction,
_namespace: &ModuleNamespace<Self>,
) {
// Nothing to do.
}
fn get_finalized_function(&self, _func: &FaerieCompiledFunction) {
// Nothing to do.
}
fn finalize_data(
&mut self,
_id: DataId,
_data: &FaerieCompiledData,
_namespace: &ModuleNamespace<Self>,
) {
// Nothing to do.
}
fn get_finalized_data(&self, _data: &FaerieCompiledData) {
// Nothing to do.
}
fn publish(&mut self) {
// Nothing to do.
}
fn finish(self, _namespace: &ModuleNamespace<Self>) -> FaerieProduct {
FaerieProduct {
artifact: self.artifact,
}
}
}
/// This is the output of `Module`'s
/// [`finish`](../cranelift_module/struct.Module.html#method.finish) function.
/// It provides functions for writing out the object file to memory or a file.
#[derive(Debug)]
pub struct FaerieProduct {
/// Faerie artifact with all functions, data, and links from the module defined
pub artifact: faerie::Artifact,
}
impl FaerieProduct {
/// Return the name of the output file. This is the name passed into `new`.
pub fn name(&self) -> &str {
&self.artifact.name
}
/// Call `emit` on the faerie `Artifact`, producing bytes in memory.
pub fn emit(&self) -> Result<Vec<u8>, faerie::ArtifactError> {
self.artifact.emit()
}
/// Call `write` on the faerie `Artifact`, writing to a file.
pub fn write(&self, sink: File) -> Result<(), faerie::ArtifactError> {
self.artifact.write(sink)
}
}
fn translate_function_linkage(linkage: Linkage) -> faerie::Decl {
match linkage {
Linkage::Import => faerie::Decl::function_import().into(),
Linkage::Local => faerie::Decl::function().into(),
Linkage::Preemptible => faerie::Decl::function().weak().into(),
Linkage::Hidden => faerie::Decl::function().global().hidden().into(),
Linkage::Export => faerie::Decl::function().global().into(),
}
}
fn translate_data_linkage(linkage: Linkage, writable: bool, align: Option<u8>) -> faerie::Decl {
let align = align.map(u64::from);
match linkage {
Linkage::Import => faerie::Decl::data_import().into(),
Linkage::Local => faerie::Decl::data()
.with_writable(writable)
.with_align(align)
.into(),
Linkage::Preemptible => faerie::Decl::data()
.weak()
.with_writable(writable)
.with_align(align)
.into(),
Linkage::Hidden => faerie::Decl::data()
.global()
.hidden()
.with_writable(writable)
.with_align(align)
.into(),
Linkage::Export => faerie::Decl::data()
.global()
.with_writable(writable)
.with_align(align)
.into(),
}
}
struct FaerieRelocSink<'a> {
triple: Triple,
artifact: &'a mut faerie::Artifact,
name: &'a str,
namespace: &'a ModuleNamespace<'a, FaerieBackend>,
libcall_names: &'a dyn Fn(ir::LibCall) -> String,
}
impl<'a> RelocSink for FaerieRelocSink<'a> {
fn reloc_block(&mut self, _offset: CodeOffset, _reloc: Reloc, _block_offset: CodeOffset) {
unimplemented!();
}
fn reloc_external(
&mut self,
offset: CodeOffset,
_srcloc: ir::SourceLoc,
reloc: Reloc,
name: &ir::ExternalName,
addend: Addend,
) {
let ref_name: String = match *name {
ir::ExternalName::User { .. } => {
if self.namespace.is_function(name) {
self.namespace.get_function_decl(name).name.clone()
} else {
self.namespace.get_data_decl(name).name.clone()
}
}
ir::ExternalName::LibCall(ref libcall) => {
let sym = (self.libcall_names)(*libcall);
self.artifact
.declare(sym.clone(), faerie::Decl::function_import())
.expect("faerie declaration of libcall");
sym
}
_ => panic!("invalid ExternalName {}", name),
};
let (raw_reloc, raw_addend) = container::raw_relocation(reloc, &self.triple);
// TODO: Handle overflow.
let final_addend = addend + raw_addend;
let addend_i32 = final_addend as i32;
debug_assert!(i64::from(addend_i32) == final_addend);
self.artifact
.link_with(
faerie::Link {
from: self.name,
to: &ref_name,
at: u64::from(offset),
},
faerie::Reloc::Raw {
reloc: raw_reloc,
addend: addend_i32,
},
)
.expect("faerie relocation error");
}
fn reloc_jt(&mut self, _offset: CodeOffset, reloc: Reloc, _jt: ir::JumpTable) {
match reloc {
Reloc::X86PCRelRodata4 => {
// Not necessary to record this unless we are going to split apart code and its
// jumptbl/rodata.
}
_ => {
panic!("Unhandled reloc");
}
}
}
fn reloc_constant(&mut self, _offset: CodeOffset, reloc: Reloc, _jt: ir::ConstantOffset) {
match reloc {
Reloc::X86PCRelRodata4 => {
// Not necessary to record this unless we are going to split apart code and its
// jumptbl/rodata.
}
_ => {
panic!("Unhandled reloc");
}
}
}
}
#[allow(dead_code)]
struct FaerieStackMapSink<'a> {
artifact: &'a mut faerie::Artifact,
namespace: &'a ModuleNamespace<'a, FaerieBackend>,
}
/// Faerie is currently not used in SpiderMonkey. Methods are unimplemented.
impl<'a> StackMapSink for FaerieStackMapSink<'a> {
fn add_stack_map(&mut self, _: CodeOffset, _: StackMap) {
unimplemented!("faerie support for stack maps");
}
}

65
cranelift/faerie/src/container.rs
View File

@@ -1,65 +0,0 @@
//! Utilities for working with Faerie container formats.
use cranelift_codegen::binemit::Reloc;
use target_lexicon::{Architecture, BinaryFormat, Triple};
/// An object file format.
#[derive(Copy, Clone, Debug, Eq, PartialEq)]
pub enum Format {
/// The ELF object file format.
ELF,
/// The Mach-O object file format.
MachO,
}
/// Translate from a Cranelift `Reloc` to a raw object-file-format-specific
/// relocation code and relocation-implied addend.
pub fn raw_relocation(reloc: Reloc, triple: &Triple) -> (u32, i64) {
match triple.binary_format {
BinaryFormat::Elf => {
use goblin::elf;
(
match triple.architecture {
Architecture::X86_64 => {
match reloc {
Reloc::Abs4 => elf::reloc::R_X86_64_32,
Reloc::Abs8 => elf::reloc::R_X86_64_64,
Reloc::X86PCRel4 | Reloc::X86CallPCRel4 => elf::reloc::R_X86_64_PC32,
// TODO: Get Cranelift to tell us when we can use
// R_X86_64_GOTPCRELX/R_X86_64_REX_GOTPCRELX.
Reloc::X86CallPLTRel4 => elf::reloc::R_X86_64_PLT32,
Reloc::X86GOTPCRel4 => elf::reloc::R_X86_64_GOTPCREL,
_ => unimplemented!(),
}
}
_ => unimplemented!("unsupported architecture: {}", triple),
},
// Most ELF relocations do not include an implicit addend.
0,
)
}
BinaryFormat::Macho => {
use goblin::mach;
match triple.architecture {
Architecture::X86_64 => {
match reloc {
Reloc::Abs8 => (u32::from(mach::relocation::R_ABS), 0),
// Mach-O doesn't need us to distinguish between PC-relative calls
// and PLT calls, but it does need us to distinguish between calls
// and non-calls. And, it includes the 4-byte addend implicitly.
Reloc::X86PCRel4 => (u32::from(mach::relocation::X86_64_RELOC_SIGNED), 4),
Reloc::X86CallPCRel4 | Reloc::X86CallPLTRel4 => {
(u32::from(mach::relocation::X86_64_RELOC_BRANCH), 4)
}
Reloc::X86GOTPCRel4 => {
(u32::from(mach::relocation::X86_64_RELOC_GOT_LOAD), 4)
}
_ => unimplemented!("unsupported mach-o reloc: {}", reloc),
}
}
_ => unimplemented!("unsupported architecture: {}", triple),
}
}
_ => unimplemented!("unsupported format"),
}
}

35
cranelift/faerie/src/lib.rs
View File

@@ -1,35 +0,0 @@
//! Top-level lib.rs for `cranelift_faerie`.
//!
//! Users of this module should not have to depend on faerie directly.
#![deny(
missing_docs,
trivial_numeric_casts,
unused_extern_crates,
unstable_features
)]
#![warn(unused_import_braces)]
#![cfg_attr(feature = "clippy", plugin(clippy(conf_file = "../../clippy.toml")))]
#![cfg_attr(feature = "cargo-clippy", allow(clippy::new_without_default))]
#![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
)
)]
mod backend;
mod container;
pub use crate::backend::{FaerieBackend, FaerieBuilder, FaerieProduct};
pub use crate::container::Format;
/// Version number of this crate.
pub const VERSION: &str = env!("CARGO_PKG_VERSION");

3
cranelift/module/README.md
View File

@@ -15,9 +15,6 @@ following `Backend` implementations:
code to memory for direct execution.
- `ObjectBackend`, provided by [cranelift-object], which emits native
object files.
- `FaerieBackend`, provided by [cranelift-faerie], which emits native
object files.
[cranelift-simplejit]: https://crates.io/crates/cranelift-simplejit
[cranelift-object]: https://crates.io/crates/cranelift-object
[cranelift-faerie]: https://crates.io/crates/cranelift-faerie

3
cranelift/module/src/backend.rs
View File

@@ -22,12 +22,9 @@ use std::string::String;
/// the contents of a `Module` to memory which can be directly executed.
/// - `ObjectBackend`, defined in [cranelift-object], which writes the
/// contents of a `Module` out as a native object file.
/// - `FaerieBackend`, defined in [cranelift-faerie], which writes the
/// contents of a `Module` out as a native object file.
///
/// [cranelift-simplejit]: https://docs.rs/cranelift-simplejit/
/// [cranelift-object]: https://docs.rs/cranelift-object/
/// [cranelift-faerie]: https://docs.rs/cranelift-faerie/
pub trait Backend
where
Self: marker::Sized,

1
scripts/publish.rs
View File

@@ -34,7 +34,6 @@ const CRATES_TO_PUBLISH: &[&str] = &[
"cranelift-preopt",
"cranelift-frontend",
"cranelift-wasm",
"cranelift-faerie",
"cranelift-native",
"cranelift-object",
"cranelift-interpreter",