#![doc(html_root_url = "https://doc.rust-lang.org/nightly/")]
#![feature(bool_to_option)]
#![feature(box_patterns)]
#![feature(box_syntax)]
#![feature(core_intrinsics)]
#![feature(libc)]
#![feature(slice_patterns)]
#![feature(stmt_expr_attributes)]
#![feature(try_blocks)]
#![feature(in_band_lifetimes)]
#![feature(nll)]
#![feature(trusted_len)]
#![feature(associated_type_bounds)]
#![recursion_limit="256"]
//! This crate contains codegen code that is used by all codegen backends (LLVM and others).
//! The backend-agnostic functions of this crate use functions defined in various traits that
//! have to be implemented by each backends.
#[macro_use] extern crate log;
#[macro_use] extern crate rustc;
#[macro_use] extern crate syntax;
use std::path::{Path, PathBuf};
use rustc::dep_graph::WorkProduct;
use rustc::session::config::{OutputFilenames, OutputType, RUST_CGU_EXT};
use rustc::middle::lang_items::LangItem;
use rustc::hir::def_id::CrateNum;
use rustc::ty::query::Providers;
use rustc_data_structures::fx::{FxHashMap, FxHashSet};
use rustc_data_structures::sync::Lrc;
use rustc_data_structures::svh::Svh;
use rustc::middle::cstore::{LibSource, CrateSource, NativeLibrary};
use rustc::middle::dependency_format::Dependencies;
use syntax_pos::symbol::Symbol;
pub mod common;
pub mod traits;
pub mod mir;
pub mod debuginfo;
pub mod base;
pub mod glue;
pub mod meth;
pub mod mono_item;
pub mod back;
pub struct ModuleCodegen {
/// The name of the module. When the crate may be saved between
/// compilations, incremental compilation requires that name be
/// unique amongst **all** crates. Therefore, it should contain
/// something unique to this crate (e.g., a module path) as well
/// as the crate name and disambiguator.
/// We currently generate these names via CodegenUnit::build_cgu_name().
pub name: String,
pub module_llvm: M,
pub kind: ModuleKind,
}
// FIXME(eddyb) maybe include the crate name in this?
pub const METADATA_FILENAME: &str = "lib.rmeta";
pub const RLIB_BYTECODE_EXTENSION: &str = "bc.z";
impl ModuleCodegen {
pub fn into_compiled_module(self,
emit_obj: bool,
emit_bc: bool,
emit_bc_compressed: bool,
outputs: &OutputFilenames) -> CompiledModule {
let object = emit_obj
.to_option_with(|| outputs.temp_path(OutputType::Object, Some(&self.name)));
let bytecode = emit_bc
.to_option_with(|| outputs.temp_path(OutputType::Bitcode, Some(&self.name)));
let bytecode_compressed = emit_bc_compressed.to_option_with(|| {
outputs.temp_path(OutputType::Bitcode, Some(&self.name))
.with_extension(RLIB_BYTECODE_EXTENSION)
});
CompiledModule {
name: self.name.clone(),
kind: self.kind,
object,
bytecode,
bytecode_compressed,
}
}
}
#[derive(Debug)]
pub struct CompiledModule {
pub name: String,
pub kind: ModuleKind,
pub object: Option,
pub bytecode: Option,
pub bytecode_compressed: Option,
}
pub struct CachedModuleCodegen {
pub name: String,
pub source: WorkProduct,
}
#[derive(Copy, Clone, Debug, PartialEq)]
pub enum ModuleKind {
Regular,
Metadata,
Allocator,
}
bitflags::bitflags! {
pub struct MemFlags: u8 {
const VOLATILE = 1 << 0;
const NONTEMPORAL = 1 << 1;
const UNALIGNED = 1 << 2;
}
}
/// Misc info we load from metadata to persist beyond the tcx.
#[derive(Debug)]
pub struct CrateInfo {
pub panic_runtime: Option,
pub compiler_builtins: Option,
pub profiler_runtime: Option,
pub sanitizer_runtime: Option,
pub is_no_builtins: FxHashSet,
pub native_libraries: FxHashMap>>,
pub crate_name: FxHashMap,
pub used_libraries: Lrc>,
pub link_args: Lrc>,
pub used_crate_source: FxHashMap>,
pub used_crates_static: Vec<(CrateNum, LibSource)>,
pub used_crates_dynamic: Vec<(CrateNum, LibSource)>,
pub lang_item_to_crate: FxHashMap,
pub missing_lang_items: FxHashMap>,
pub dependency_formats: Lrc,
}
pub struct CodegenResults {
pub crate_name: Symbol,
pub modules: Vec,
pub allocator_module: Option,
pub metadata_module: Option,
pub crate_hash: Svh,
pub metadata: rustc::middle::cstore::EncodedMetadata,
pub windows_subsystem: Option,
pub linker_info: back::linker::LinkerInfo,
pub crate_info: CrateInfo,
}
pub fn provide(providers: &mut Providers<'_>) {
crate::back::symbol_export::provide(providers);
crate::base::provide_both(providers);
}
pub fn provide_extern(providers: &mut Providers<'_>) {
crate::back::symbol_export::provide_extern(providers);
crate::base::provide_both(providers);
}
/// Checks if the given filename ends with the `.rcgu.o` extension that `rustc`
/// uses for the object files it generates.
pub fn looks_like_rust_object_file(filename: &str) -> bool {
let path = Path::new(filename);
let ext = path.extension().and_then(|s| s.to_str());
if ext != Some(OutputType::Object.extension()) {
// The file name does not end with ".o", so it can't be an object file.
return false
}
// Strip the ".o" at the end
let ext2 = path.file_stem()
.and_then(|s| Path::new(s).extension())
.and_then(|s| s.to_str());
// Check if the "inner" extension
ext2 == Some(RUST_CGU_EXT)
}