mirror of
https://github.com/rust-lang/rust.git
synced 2024-11-27 09:14:20 +00:00
bjorn3
GitHub
commit
ef5d16178d
79
Cargo.lock
generated
79
Cargo.lock
generated
@ -87,6 +87,14 @@ dependencies = [
|
||||
"vec_map 0.8.1 (registry+https://github.com/rust-lang/crates.io-index)",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "cloudabi"
|
||||
version = "0.0.3"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
dependencies = [
|
||||
"bitflags 1.0.4 (registry+https://github.com/rust-lang/crates.io-index)",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "cranelift"
|
||||
version = "0.23.0"
|
||||
@ -258,6 +266,20 @@ dependencies = [
|
||||
"synstructure 0.10.1 (registry+https://github.com/rust-lang/crates.io-index)",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "fuchsia-zircon"
|
||||
version = "0.3.3"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
dependencies = [
|
||||
"bitflags 1.0.4 (registry+https://github.com/rust-lang/crates.io-index)",
|
||||
"fuchsia-zircon-sys 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "fuchsia-zircon-sys"
|
||||
version = "0.3.3"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
|
||||
[[package]]
|
||||
name = "gcc"
|
||||
version = "0.3.55"
|
||||
@ -361,6 +383,31 @@ dependencies = [
|
||||
"proc-macro2 0.4.21 (registry+https://github.com/rust-lang/crates.io-index)",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "rand"
|
||||
version = "0.5.5"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
dependencies = [
|
||||
"cloudabi 0.0.3 (registry+https://github.com/rust-lang/crates.io-index)",
|
||||
"fuchsia-zircon 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
|
||||
"libc 0.2.43 (registry+https://github.com/rust-lang/crates.io-index)",
|
||||
"rand_core 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
|
||||
"winapi 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "rand_core"
|
||||
version = "0.2.2"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
dependencies = [
|
||||
"rand_core 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "rand_core"
|
||||
version = "0.3.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
|
||||
[[package]]
|
||||
name = "raw-cpuid"
|
||||
version = "6.0.0"
|
||||
@ -415,6 +462,14 @@ dependencies = [
|
||||
"winapi 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "remove_dir_all"
|
||||
version = "0.5.1"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
dependencies = [
|
||||
"winapi 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "rustc-demangle"
|
||||
version = "0.1.9"
|
||||
@ -427,12 +482,15 @@ dependencies = [
|
||||
"ar 0.6.0 (registry+https://github.com/rust-lang/crates.io-index)",
|
||||
"bitflags 1.0.4 (registry+https://github.com/rust-lang/crates.io-index)",
|
||||
"byteorder 1.2.7 (registry+https://github.com/rust-lang/crates.io-index)",
|
||||
"cc 1.0.25 (registry+https://github.com/rust-lang/crates.io-index)",
|
||||
"cranelift 0.23.0 (git+https://github.com/CraneStation/cranelift.git)",
|
||||
"cranelift-faerie 0.23.0 (git+https://github.com/CraneStation/cranelift.git)",
|
||||
"cranelift-module 0.23.0 (git+https://github.com/CraneStation/cranelift.git)",
|
||||
"cranelift-simplejit 0.23.0 (git+https://github.com/CraneStation/cranelift.git)",
|
||||
"faerie 0.6.0 (registry+https://github.com/rust-lang/crates.io-index)",
|
||||
"libc 0.2.43 (registry+https://github.com/rust-lang/crates.io-index)",
|
||||
"target-lexicon 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
|
||||
"tempfile 3.0.4 (registry+https://github.com/rust-lang/crates.io-index)",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
@ -559,6 +617,19 @@ dependencies = [
|
||||
"serde_json 1.0.33 (registry+https://github.com/rust-lang/crates.io-index)",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "tempfile"
|
||||
version = "3.0.4"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
dependencies = [
|
||||
"cfg-if 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
|
||||
"libc 0.2.43 (registry+https://github.com/rust-lang/crates.io-index)",
|
||||
"rand 0.5.5 (registry+https://github.com/rust-lang/crates.io-index)",
|
||||
"redox_syscall 0.1.40 (registry+https://github.com/rust-lang/crates.io-index)",
|
||||
"remove_dir_all 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
|
||||
"winapi 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "termcolor"
|
||||
version = "1.0.4"
|
||||
@ -676,6 +747,7 @@ dependencies = [
|
||||
"checksum cc 1.0.25 (registry+https://github.com/rust-lang/crates.io-index)" = "f159dfd43363c4d08055a07703eb7a3406b0dac4d0584d96965a3262db3c9d16"
|
||||
"checksum cfg-if 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)" = "082bb9b28e00d3c9d39cc03e64ce4cea0f1bb9b3fde493f0cbc008472d22bdf4"
|
||||
"checksum clap 2.32.0 (registry+https://github.com/rust-lang/crates.io-index)" = "b957d88f4b6a63b9d70d5f454ac8011819c6efa7727858f458ab71c756ce2d3e"
|
||||
"checksum cloudabi 0.0.3 (registry+https://github.com/rust-lang/crates.io-index)" = "ddfc5b9aa5d4507acaf872de71051dfd0e309860e88966e1051e462a077aac4f"
|
||||
"checksum cranelift 0.23.0 (git+https://github.com/CraneStation/cranelift.git)" = "<none>"
|
||||
"checksum cranelift-bforest 0.23.0 (git+https://github.com/CraneStation/cranelift.git)" = "<none>"
|
||||
"checksum cranelift-codegen 0.23.0 (git+https://github.com/CraneStation/cranelift.git)" = "<none>"
|
||||
@ -692,6 +764,8 @@ dependencies = [
|
||||
"checksum faerie 0.6.0 (registry+https://github.com/rust-lang/crates.io-index)" = "7f869e12bcad2b4ff6ac60e01c2354957312fbf0c10dc938f340d58932b3db52"
|
||||
"checksum failure 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)" = "6dd377bcc1b1b7ce911967e3ec24fa19c3224394ec05b54aa7b083d498341ac7"
|
||||
"checksum failure_derive 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)" = "64c2d913fe8ed3b6c6518eedf4538255b989945c14c2a7d5cbff62a5e2120596"
|
||||
"checksum fuchsia-zircon 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)" = "2e9763c69ebaae630ba35f74888db465e49e259ba1bc0eda7d06f4a067615d82"
|
||||
"checksum fuchsia-zircon-sys 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)" = "3dcaa9ae7725d12cdb85b3ad99a434db70b468c09ded17e012d86b5c1010f7a7"
|
||||
"checksum gcc 0.3.55 (registry+https://github.com/rust-lang/crates.io-index)" = "8f5f3913fa0bfe7ee1fd8248b6b9f42a5af4b9d65ec2dd2c3c26132b950ecfc2"
|
||||
"checksum goblin 0.0.19 (registry+https://github.com/rust-lang/crates.io-index)" = "c65cd533b33e3d04c6e393225fa8919ddfcf5862ca8919c7f9a167c312ef41c2"
|
||||
"checksum heck 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)" = "ea04fa3ead4e05e51a7c806fc07271fdbde4e246a6c6d1efd52e72230b771b82"
|
||||
@ -707,12 +781,16 @@ dependencies = [
|
||||
"checksum proc-macro2 0.4.21 (registry+https://github.com/rust-lang/crates.io-index)" = "ab2fc21ba78ac73e4ff6b3818ece00be4e175ffbef4d0a717d978b48b24150c4"
|
||||
"checksum quick-error 1.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "9274b940887ce9addde99c4eee6b5c44cc494b182b97e73dc8ffdcb3397fd3f0"
|
||||
"checksum quote 0.6.10 (registry+https://github.com/rust-lang/crates.io-index)" = "53fa22a1994bd0f9372d7a816207d8a2677ad0325b073f5c5332760f0fb62b5c"
|
||||
"checksum rand 0.5.5 (registry+https://github.com/rust-lang/crates.io-index)" = "e464cd887e869cddcae8792a4ee31d23c7edd516700695608f5b98c67ee0131c"
|
||||
"checksum rand_core 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "1961a422c4d189dfb50ffa9320bf1f2a9bd54ecb92792fb9477f99a1045f3372"
|
||||
"checksum rand_core 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)" = "0905b6b7079ec73b314d4c748701f6931eb79fd97c668caa3f1899b22b32c6db"
|
||||
"checksum raw-cpuid 6.0.0 (registry+https://github.com/rust-lang/crates.io-index)" = "41219962ecab392f1e68db9e7ebd972800d4045a128cc23462b384e8c312cde1"
|
||||
"checksum redox_syscall 0.1.40 (registry+https://github.com/rust-lang/crates.io-index)" = "c214e91d3ecf43e9a4e41e578973adeb14b474f2bee858742d127af75a0112b1"
|
||||
"checksum redox_termios 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "7e891cfe48e9100a70a3b6eb652fef28920c117d366339687bd5576160db0f76"
|
||||
"checksum regex 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)" = "ee84f70c8c08744ea9641a731c7fadb475bf2ecc52d7f627feb833e0b3990467"
|
||||
"checksum regex-syntax 0.6.3 (registry+https://github.com/rust-lang/crates.io-index)" = "fbc557aac2b708fe84121caf261346cc2eed71978024337e42eb46b8a252ac6e"
|
||||
"checksum region 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)" = "cff177f64744f6f2a2054d231279383e59b0857b4d58dc2e8881e60b58aec8e5"
|
||||
"checksum remove_dir_all 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)" = "3488ba1b9a2084d38645c4c08276a1752dcbf2c7130d74f1569681ad5d2799c5"
|
||||
"checksum rustc-demangle 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)" = "bcfe5b13211b4d78e5c2cadfebd7769197d95c639c35a50057eb4c05de811395"
|
||||
"checksum rustc_version 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)" = "138e3e0acb6c9fb258b19b67cb8abd63c00679d2851805ea151465464fe9030a"
|
||||
"checksum ryu 0.2.6 (registry+https://github.com/rust-lang/crates.io-index)" = "7153dd96dade874ab973e098cb62fcdbb89a03682e46b144fd09550998d4a4a7"
|
||||
@ -729,6 +807,7 @@ dependencies = [
|
||||
"checksum syn 0.15.18 (registry+https://github.com/rust-lang/crates.io-index)" = "90c39a061e2f412a9f869540471ab679e85e50c6b05604daf28bc3060f75c430"
|
||||
"checksum synstructure 0.10.1 (registry+https://github.com/rust-lang/crates.io-index)" = "73687139bf99285483c96ac0add482c3776528beac1d97d444f6e91f203a2015"
|
||||
"checksum target-lexicon 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "4af5e2227f0b887d591d3724b796a96eff04226104d872f5b3883fcd427d64b9"
|
||||
"checksum tempfile 3.0.4 (registry+https://github.com/rust-lang/crates.io-index)" = "55c1195ef8513f3273d55ff59fe5da6940287a0d7a98331254397f464833675b"
|
||||
"checksum termcolor 1.0.4 (registry+https://github.com/rust-lang/crates.io-index)" = "4096add70612622289f2fdcdbd5086dc81c1e2675e6ae58d6c4f62a16c6d7f2f"
|
||||
"checksum termion 1.5.1 (registry+https://github.com/rust-lang/crates.io-index)" = "689a3bdfaab439fd92bc87df5c4c78417d3cbe537487274e9b0b2dce76e92096"
|
||||
"checksum textwrap 0.10.0 (registry+https://github.com/rust-lang/crates.io-index)" = "307686869c93e71f94da64286f9a9524c0f308a9e1c87a583de8e9c9039ad3f6"
|
||||
|
||||
@ -25,6 +25,9 @@ faerie = "0.6.0"
|
||||
ar = "0.6.0"
|
||||
bitflags = "1.0.3"
|
||||
byteorder = "1.2.6"
|
||||
cc = "1.0.25"
|
||||
libc = "0.2.43"
|
||||
tempfile = "3.0.4"
|
||||
|
||||
# Uncomment to use local checkout of cranelift
|
||||
#[patch."https://github.com/CraneStation/cranelift.git"]
|
||||
|
||||
22
build.sh
22
build.sh
@ -14,11 +14,7 @@ fi
|
||||
|
||||
build_example_bin() {
|
||||
$RUSTC $2 --crate-name $1 --crate-type bin
|
||||
|
||||
pushd target/out
|
||||
gcc $1 libmini_core.rlib -o $1_bin
|
||||
sh -c ./$1_bin || true
|
||||
popd
|
||||
sh -c ./target/out/$1 || true
|
||||
}
|
||||
|
||||
if [[ "$1" == "--release" ]]; then
|
||||
@ -54,16 +50,20 @@ rm -r target || true
|
||||
time xargo build
|
||||
popd
|
||||
|
||||
$RUSTC --sysroot ~/.xargo/HOST example/alloc_example.rs --crate-type bin
|
||||
# TODO linux linker doesn't accept duplicate definitions
|
||||
#gcc -Wl,--gc-sections target/out/alloc_example ~/.xargo/HOST/lib/rustlib/*/lib/libcore-*.rlib ~/.xargo/HOST/lib/rustlib/*/lib/liballoc-*.rlib ~/.xargo/HOST/lib/rustlib/*/lib/liballoc_system-*.rlib -o target/out/alloc_example_exe
|
||||
#hyperfine ./target/out/alloc_example_exe
|
||||
#$RUSTC --sysroot ~/.xargo/HOST example/alloc_example.rs --crate-type bin
|
||||
#./target/out/alloc_example
|
||||
|
||||
$RUSTC --sysroot ~/.xargo/HOST example/mod_bench.rs --crate-type bin
|
||||
gcc -Wl,--gc-sections target/out/mod_bench -lc -o target/out/mod_bench_exe
|
||||
|
||||
echo "[BUILD] RUSTFLAGS=-Zmir-opt-level=3"
|
||||
pushd xargo
|
||||
rm -r ~/.xargo/HOST || true
|
||||
rm -r target || true
|
||||
time RUSTFLAGS="-Zmir-opt-level=3 $RUSTFLAGS" xargo build
|
||||
popd
|
||||
|
||||
$RUSTC --sysroot ~/.xargo/HOST example/mod_bench.rs --crate-type bin -Zmir-opt-level=3 --crate-name mod_bench_inline
|
||||
gcc -Wl,--gc-sections target/out/mod_bench_inline -lc -o target/out/mod_bench_inline_exe
|
||||
|
||||
rustc example/mod_bench.rs --crate-type bin -Copt-level=0 -o target/out/mod_bench_llvm_0 -Cpanic=abort
|
||||
rustc example/mod_bench.rs --crate-type bin -Copt-level=1 -o target/out/mod_bench_llvm_1 -Cpanic=abort
|
||||
@ -71,6 +71,6 @@ rustc example/mod_bench.rs --crate-type bin -Copt-level=2 -o target/out/mod_benc
|
||||
rustc example/mod_bench.rs --crate-type bin -Copt-level=3 -o target/out/mod_bench_llvm_3 -Cpanic=abort
|
||||
echo
|
||||
echo "[Bench] mod_bench"
|
||||
hyperfine ./target/out/mod_bench{,_inline}_exe ./target/out/mod_bench_llvm_*
|
||||
hyperfine ./target/out/mod_bench{,_inline} ./target/out/mod_bench_llvm_*
|
||||
|
||||
cat target/out/log.txt | sort | uniq -c
|
||||
|
||||
99
src/archive.rs
Normal file
99
src/archive.rs
Normal file
@ -0,0 +1,99 @@
|
||||
use std::collections::HashMap;
|
||||
use std::fs::File;
|
||||
use std::path::PathBuf;
|
||||
|
||||
use crate::prelude::*;
|
||||
|
||||
pub struct ArchiveConfig<'a> {
|
||||
pub sess: &'a Session,
|
||||
pub dst: PathBuf,
|
||||
pub src: Option<PathBuf>,
|
||||
pub lib_search_paths: Vec<PathBuf>,
|
||||
}
|
||||
|
||||
pub struct ArchiveBuilder<'a> {
|
||||
cfg: ArchiveConfig<'a>,
|
||||
src_archive: Option<ar::Archive<File>>,
|
||||
src_entries: HashMap<String, usize>,
|
||||
builder: ar::Builder<File>,
|
||||
update_symbols: bool,
|
||||
}
|
||||
|
||||
impl<'a> ArchiveBuilder<'a> {
|
||||
pub fn new(cfg: ArchiveConfig<'a>) -> Self {
|
||||
let (src_archive, src_entries) = if let Some(src) = &cfg.src {
|
||||
let mut archive = ar::Archive::new(File::open(src).unwrap());
|
||||
let mut entries = HashMap::new();
|
||||
|
||||
let mut i = 0;
|
||||
while let Some(entry) = archive.next_entry() {
|
||||
let entry = entry.unwrap();
|
||||
entries.insert(
|
||||
String::from_utf8(entry.header().identifier().to_vec()).unwrap(),
|
||||
i,
|
||||
);
|
||||
i += 1;
|
||||
}
|
||||
|
||||
(Some(archive), entries)
|
||||
} else {
|
||||
(None, HashMap::new())
|
||||
};
|
||||
|
||||
let builder = ar::Builder::new(File::create(&cfg.dst).unwrap());
|
||||
|
||||
ArchiveBuilder {
|
||||
cfg,
|
||||
src_archive,
|
||||
src_entries,
|
||||
builder,
|
||||
update_symbols: false,
|
||||
}
|
||||
}
|
||||
|
||||
pub fn src_files(&self) -> Vec<String> {
|
||||
self.src_entries.keys().cloned().collect()
|
||||
}
|
||||
|
||||
pub fn remove_file(&mut self, name: &str) {
|
||||
assert!(
|
||||
self.src_entries.remove(name).is_some(),
|
||||
"Tried to remove file not existing in src archive",
|
||||
);
|
||||
}
|
||||
|
||||
pub fn update_symbols(&mut self) {
|
||||
self.update_symbols = true;
|
||||
}
|
||||
|
||||
pub fn build(mut self) {
|
||||
// Add files from original archive
|
||||
if let Some(mut src_archive) = self.src_archive {
|
||||
for (_entry_name, entry_idx) in self.src_entries.into_iter() {
|
||||
let entry = src_archive.jump_to_entry(entry_idx).unwrap();
|
||||
let orig_header = entry.header();
|
||||
let mut header =
|
||||
ar::Header::new(orig_header.identifier().to_vec(), orig_header.size());
|
||||
header.set_mtime(orig_header.mtime());
|
||||
header.set_uid(orig_header.uid());
|
||||
header.set_gid(orig_header.gid());
|
||||
header.set_mode(orig_header.mode());
|
||||
self.builder.append(&header, entry).unwrap();
|
||||
}
|
||||
}
|
||||
|
||||
// Finalize archive
|
||||
std::mem::drop(self.builder);
|
||||
|
||||
// Run ranlib to be able to link the archive
|
||||
let status = std::process::Command::new("ranlib")
|
||||
.arg(self.cfg.dst)
|
||||
.status()
|
||||
.expect("Couldn't run ranlib");
|
||||
assert!(
|
||||
status.success(),
|
||||
"Ranlib exited with code {:?}",
|
||||
status.code()
|
||||
);
|
||||
}
|
||||
}
|
||||
166
src/lib.rs
166
src/lib.rs
@ -17,6 +17,9 @@ extern crate rustc_mir;
|
||||
extern crate rustc_target;
|
||||
#[macro_use]
|
||||
extern crate rustc_data_structures;
|
||||
extern crate rustc_fs_util;
|
||||
#[macro_use]
|
||||
extern crate log;
|
||||
|
||||
extern crate ar;
|
||||
#[macro_use]
|
||||
@ -37,11 +40,19 @@ use std::sync::mpsc;
|
||||
use syntax::symbol::Symbol;
|
||||
|
||||
use rustc::dep_graph::DepGraph;
|
||||
use rustc::middle::cstore::MetadataLoader;
|
||||
use rustc::session::{config::OutputFilenames, CompileIncomplete};
|
||||
use rustc::middle::cstore::{
|
||||
self, CrateSource, LibSource, LinkagePreference, MetadataLoader, NativeLibrary,
|
||||
};
|
||||
use rustc::middle::lang_items::LangItem;
|
||||
use rustc::middle::weak_lang_items;
|
||||
use rustc::session::{
|
||||
config::{self, OutputFilenames, OutputType},
|
||||
CompileIncomplete,
|
||||
};
|
||||
use rustc::ty::query::Providers;
|
||||
use rustc_codegen_utils::codegen_backend::CodegenBackend;
|
||||
use rustc_codegen_utils::link::out_filename;
|
||||
use rustc_codegen_utils::linker::LinkerInfo;
|
||||
|
||||
use cranelift::codegen::settings;
|
||||
use cranelift_faerie::*;
|
||||
@ -60,11 +71,13 @@ macro_rules! unimpl {
|
||||
mod abi;
|
||||
mod allocator;
|
||||
mod analyze;
|
||||
mod archive;
|
||||
mod base;
|
||||
mod common;
|
||||
mod constant;
|
||||
mod intrinsics;
|
||||
mod link;
|
||||
mod link_copied;
|
||||
mod main_shim;
|
||||
mod metadata;
|
||||
mod pretty_clif;
|
||||
@ -88,7 +101,7 @@ mod prelude {
|
||||
self, subst::Substs, FnSig, Instance, InstanceDef, ParamEnv, PolyFnSig, Ty, TyCtxt,
|
||||
TypeAndMut, TypeFoldable,
|
||||
};
|
||||
pub use rustc_codegen_utils::CompiledModule;
|
||||
pub use rustc_codegen_utils::{CompiledModule, ModuleKind};
|
||||
pub use rustc_data_structures::{
|
||||
fx::{FxHashMap, FxHashSet},
|
||||
indexed_vec::Idx,
|
||||
@ -108,7 +121,7 @@ mod prelude {
|
||||
pub use crate::abi::*;
|
||||
pub use crate::base::{trans_operand, trans_place};
|
||||
pub use crate::common::*;
|
||||
pub use crate::{Caches, CodegenResults};
|
||||
pub use crate::{Caches, CodegenResults, CrateInfo};
|
||||
}
|
||||
|
||||
pub struct Caches<'tcx> {
|
||||
@ -127,10 +140,132 @@ impl<'tcx> Caches<'tcx> {
|
||||
|
||||
struct CraneliftCodegenBackend;
|
||||
|
||||
pub struct CrateInfo {
|
||||
panic_runtime: Option<CrateNum>,
|
||||
compiler_builtins: Option<CrateNum>,
|
||||
profiler_runtime: Option<CrateNum>,
|
||||
sanitizer_runtime: Option<CrateNum>,
|
||||
is_no_builtins: FxHashSet<CrateNum>,
|
||||
native_libraries: FxHashMap<CrateNum, Lrc<Vec<NativeLibrary>>>,
|
||||
crate_name: FxHashMap<CrateNum, String>,
|
||||
used_libraries: Lrc<Vec<NativeLibrary>>,
|
||||
link_args: Lrc<Vec<String>>,
|
||||
used_crate_source: FxHashMap<CrateNum, Lrc<CrateSource>>,
|
||||
used_crates_static: Vec<(CrateNum, LibSource)>,
|
||||
used_crates_dynamic: Vec<(CrateNum, LibSource)>,
|
||||
wasm_imports: FxHashMap<String, String>,
|
||||
lang_item_to_crate: FxHashMap<LangItem, CrateNum>,
|
||||
missing_lang_items: FxHashMap<CrateNum, Vec<LangItem>>,
|
||||
}
|
||||
|
||||
impl CrateInfo {
|
||||
pub fn new(tcx: TyCtxt) -> CrateInfo {
|
||||
let mut info = CrateInfo {
|
||||
panic_runtime: None,
|
||||
compiler_builtins: None,
|
||||
profiler_runtime: None,
|
||||
sanitizer_runtime: None,
|
||||
is_no_builtins: Default::default(),
|
||||
native_libraries: Default::default(),
|
||||
used_libraries: tcx.native_libraries(LOCAL_CRATE),
|
||||
link_args: tcx.link_args(LOCAL_CRATE),
|
||||
crate_name: Default::default(),
|
||||
used_crates_dynamic: cstore::used_crates(tcx, LinkagePreference::RequireDynamic),
|
||||
used_crates_static: cstore::used_crates(tcx, LinkagePreference::RequireStatic),
|
||||
used_crate_source: Default::default(),
|
||||
wasm_imports: Default::default(),
|
||||
lang_item_to_crate: Default::default(),
|
||||
missing_lang_items: Default::default(),
|
||||
};
|
||||
let lang_items = tcx.lang_items();
|
||||
|
||||
let load_wasm_items = tcx
|
||||
.sess
|
||||
.crate_types
|
||||
.borrow()
|
||||
.iter()
|
||||
.any(|c| *c != config::CrateType::Rlib)
|
||||
&& tcx.sess.opts.target_triple.triple() == "wasm32-unknown-unknown";
|
||||
|
||||
if load_wasm_items {
|
||||
info.load_wasm_imports(tcx, LOCAL_CRATE);
|
||||
}
|
||||
|
||||
let crates = tcx.crates();
|
||||
|
||||
let n_crates = crates.len();
|
||||
info.native_libraries.reserve(n_crates);
|
||||
info.crate_name.reserve(n_crates);
|
||||
info.used_crate_source.reserve(n_crates);
|
||||
info.missing_lang_items.reserve(n_crates);
|
||||
|
||||
for &cnum in crates.iter() {
|
||||
info.native_libraries
|
||||
.insert(cnum, tcx.native_libraries(cnum));
|
||||
info.crate_name
|
||||
.insert(cnum, tcx.crate_name(cnum).to_string());
|
||||
info.used_crate_source
|
||||
.insert(cnum, tcx.used_crate_source(cnum));
|
||||
if tcx.is_panic_runtime(cnum) {
|
||||
info.panic_runtime = Some(cnum);
|
||||
}
|
||||
if tcx.is_compiler_builtins(cnum) {
|
||||
info.compiler_builtins = Some(cnum);
|
||||
}
|
||||
if tcx.is_profiler_runtime(cnum) {
|
||||
info.profiler_runtime = Some(cnum);
|
||||
}
|
||||
if tcx.is_sanitizer_runtime(cnum) {
|
||||
info.sanitizer_runtime = Some(cnum);
|
||||
}
|
||||
if tcx.is_no_builtins(cnum) {
|
||||
info.is_no_builtins.insert(cnum);
|
||||
}
|
||||
if load_wasm_items {
|
||||
info.load_wasm_imports(tcx, cnum);
|
||||
}
|
||||
let missing = tcx.missing_lang_items(cnum);
|
||||
for &item in missing.iter() {
|
||||
if let Ok(id) = lang_items.require(item) {
|
||||
info.lang_item_to_crate.insert(item, id.krate);
|
||||
}
|
||||
}
|
||||
|
||||
// No need to look for lang items that are whitelisted and don't
|
||||
// actually need to exist.
|
||||
let missing = missing
|
||||
.iter()
|
||||
.cloned()
|
||||
.filter(|&l| !weak_lang_items::whitelisted(tcx, l))
|
||||
.collect();
|
||||
info.missing_lang_items.insert(cnum, missing);
|
||||
}
|
||||
|
||||
return info;
|
||||
}
|
||||
|
||||
fn load_wasm_imports(&mut self, tcx: TyCtxt, cnum: CrateNum) {
|
||||
self.wasm_imports.extend(
|
||||
tcx.wasm_import_module_map(cnum)
|
||||
.iter()
|
||||
.map(|(&id, module)| {
|
||||
let instance = Instance::mono(tcx, id);
|
||||
let import_name = tcx.symbol_name(instance);
|
||||
|
||||
(import_name.to_string(), module.clone())
|
||||
}),
|
||||
);
|
||||
}
|
||||
}
|
||||
|
||||
pub struct CodegenResults {
|
||||
artifact: faerie::Artifact,
|
||||
modules: Vec<CompiledModule>,
|
||||
allocator_module: Option<CompiledModule>,
|
||||
metadata: Vec<u8>,
|
||||
crate_name: Symbol,
|
||||
crate_info: CrateInfo,
|
||||
linker_info: LinkerInfo,
|
||||
}
|
||||
|
||||
impl CodegenBackend for CraneliftCodegenBackend {
|
||||
@ -261,10 +396,29 @@ impl CodegenBackend for CraneliftCodegenBackend {
|
||||
|
||||
tcx.sess.abort_if_errors();
|
||||
|
||||
let artifact = faerie_module.finish().artifact;
|
||||
|
||||
let tmp_file = tcx
|
||||
.output_filenames(LOCAL_CRATE)
|
||||
.temp_path(OutputType::Object, None);
|
||||
let obj = artifact.emit().unwrap();
|
||||
std::fs::write(&tmp_file, obj).unwrap();
|
||||
|
||||
return Box::new(CodegenResults {
|
||||
artifact: faerie_module.finish().artifact,
|
||||
artifact,
|
||||
metadata: metadata.raw_data,
|
||||
crate_name: tcx.crate_name(LOCAL_CRATE),
|
||||
crate_info: CrateInfo::new(tcx),
|
||||
linker_info: LinkerInfo::new(tcx),
|
||||
modules: vec![CompiledModule {
|
||||
name: "dummy".to_string(),
|
||||
kind: ModuleKind::Regular,
|
||||
object: Some(tmp_file),
|
||||
bytecode: None,
|
||||
bytecode_compressed: None,
|
||||
}],
|
||||
//modules: vec![],
|
||||
allocator_module: None,
|
||||
});
|
||||
}
|
||||
}
|
||||
@ -284,7 +438,7 @@ impl CodegenBackend for CraneliftCodegenBackend {
|
||||
let output_name = out_filename(sess, crate_type, &outputs, &res.crate_name.as_str());
|
||||
match crate_type {
|
||||
CrateType::Rlib => link::link_rlib(sess, &res, output_name),
|
||||
CrateType::Executable => link::link_bin(sess, &res, output_name),
|
||||
CrateType::Executable => link::link_bin(sess, &res, &output_name),
|
||||
_ => sess.fatal(&format!("Unsupported crate type: {:?}", crate_type)),
|
||||
}
|
||||
}
|
||||
|
||||
386
src/link.rs
386
src/link.rs
@ -1,9 +1,23 @@
|
||||
use std::env;
|
||||
use std::fs::File;
|
||||
use std::path::PathBuf;
|
||||
use std::io;
|
||||
use std::path::{Path, PathBuf};
|
||||
|
||||
use tempfile::Builder as TempFileBuilder;
|
||||
|
||||
use rustc::session::config::{self, CrateType, DebugInfo, RUST_CGU_EXT};
|
||||
use rustc::session::search_paths::PathKind;
|
||||
use rustc::session::Session;
|
||||
use rustc_codegen_utils::command::Command;
|
||||
use rustc_codegen_utils::linker::*;
|
||||
use rustc_fs_util::fix_windows_verbatim_for_gcc;
|
||||
use rustc_target::spec::{LinkerFlavor, PanicStrategy, RelroLevel};
|
||||
|
||||
pub(crate) fn link_rlib(sess: &Session, res: &crate::CodegenResults, output_name: PathBuf) {
|
||||
use crate::prelude::*;
|
||||
|
||||
use crate::link_copied::*;
|
||||
|
||||
pub(crate) fn link_rlib(sess: &Session, res: &CodegenResults, output_name: PathBuf) {
|
||||
let file = File::create(&output_name).unwrap();
|
||||
let mut builder = ar::Builder::new(file);
|
||||
|
||||
@ -42,21 +56,361 @@ pub(crate) fn link_rlib(sess: &Session, res: &crate::CodegenResults, output_name
|
||||
}
|
||||
}
|
||||
|
||||
pub(crate) fn link_bin(sess: &Session, res: &crate::CodegenResults, output_name: PathBuf) {
|
||||
pub(crate) fn link_bin(sess: &Session, codegen_results: &CodegenResults, out_filename: &Path) {
|
||||
let tmpdir = match TempFileBuilder::new().prefix("rustc").tempdir() {
|
||||
Ok(tmpdir) => tmpdir,
|
||||
Err(err) => sess.fatal(&format!("couldn't create a temp dir: {}", err)),
|
||||
};
|
||||
|
||||
// TODO: link executable
|
||||
let obj = res.artifact.emit().unwrap();
|
||||
std::fs::write(output_name, obj).unwrap();
|
||||
let obj = codegen_results.artifact.emit().unwrap();
|
||||
std::fs::write(tmpdir.path().join("out".to_string() + RUST_CGU_EXT), obj).unwrap();
|
||||
|
||||
let (linker, flavor) = linker_and_flavor(sess);
|
||||
let (pname, mut cmd) = get_linker(sess, &linker, flavor);
|
||||
|
||||
let root = sess.target_filesearch(PathKind::Native).get_lib_path();
|
||||
if let Some(args) = sess.target.target.options.pre_link_args.get(&flavor) {
|
||||
cmd.args(args);
|
||||
}
|
||||
if let Some(args) = sess.target.target.options.pre_link_args_crt.get(&flavor) {
|
||||
if sess.crt_static() {
|
||||
cmd.args(args);
|
||||
}
|
||||
}
|
||||
if let Some(ref args) = sess.opts.debugging_opts.pre_link_args {
|
||||
cmd.args(args);
|
||||
}
|
||||
cmd.args(&sess.opts.debugging_opts.pre_link_arg);
|
||||
|
||||
for obj in &sess.target.target.options.pre_link_objects_exe {
|
||||
cmd.arg(root.join(obj));
|
||||
}
|
||||
|
||||
if sess.crt_static() {
|
||||
for obj in &sess.target.target.options.pre_link_objects_exe_crt {
|
||||
cmd.arg(root.join(obj));
|
||||
}
|
||||
}
|
||||
|
||||
if sess.target.target.options.is_like_emscripten {
|
||||
cmd.arg("-s");
|
||||
cmd.arg(if sess.panic_strategy() == PanicStrategy::Abort {
|
||||
"DISABLE_EXCEPTION_CATCHING=1"
|
||||
} else {
|
||||
"DISABLE_EXCEPTION_CATCHING=0"
|
||||
});
|
||||
}
|
||||
|
||||
{
|
||||
let target_cpu = "x86_64-apple-darwin"; //::llvm_util::target_cpu(sess);
|
||||
let mut linker = codegen_results.linker_info.to_linker(cmd, &sess, flavor, target_cpu);
|
||||
link_args(&mut *linker, flavor, sess, CrateType::Executable, tmpdir.path(),
|
||||
out_filename, codegen_results);
|
||||
cmd = linker.finalize();
|
||||
}
|
||||
if let Some(args) = sess.target.target.options.late_link_args.get(&flavor) {
|
||||
cmd.args(args);
|
||||
}
|
||||
for obj in &sess.target.target.options.post_link_objects {
|
||||
cmd.arg(root.join(obj));
|
||||
}
|
||||
if sess.crt_static() {
|
||||
for obj in &sess.target.target.options.post_link_objects_crt {
|
||||
cmd.arg(root.join(obj));
|
||||
}
|
||||
}
|
||||
if let Some(args) = sess.target.target.options.post_link_args.get(&flavor) {
|
||||
cmd.args(args);
|
||||
}
|
||||
for &(ref k, ref v) in &sess.target.target.options.link_env {
|
||||
cmd.env(k, v);
|
||||
}
|
||||
|
||||
if sess.opts.debugging_opts.print_link_args {
|
||||
println!("{:?}", &cmd);
|
||||
}
|
||||
|
||||
// May have not found libraries in the right formats.
|
||||
sess.abort_if_errors();
|
||||
|
||||
// Invoke the system linker
|
||||
//
|
||||
// Note that there's a terribly awful hack that really shouldn't be present
|
||||
// in any compiler. Here an environment variable is supported to
|
||||
// automatically retry the linker invocation if the linker looks like it
|
||||
// segfaulted.
|
||||
//
|
||||
// Gee that seems odd, normally segfaults are things we want to know about!
|
||||
// Unfortunately though in rust-lang/rust#38878 we're experiencing the
|
||||
// linker segfaulting on Travis quite a bit which is causing quite a bit of
|
||||
// pain to land PRs when they spuriously fail due to a segfault.
|
||||
//
|
||||
// The issue #38878 has some more debugging information on it as well, but
|
||||
// this unfortunately looks like it's just a race condition in macOS's linker
|
||||
// with some thread pool working in the background. It seems that no one
|
||||
// currently knows a fix for this so in the meantime we're left with this...
|
||||
let retry_on_segfault = env::var("RUSTC_RETRY_LINKER_ON_SEGFAULT").is_ok();
|
||||
let mut prog;
|
||||
let mut i = 0;
|
||||
loop {
|
||||
i += 1;
|
||||
prog = exec_linker(sess, &mut cmd, out_filename, tmpdir.path());
|
||||
let output = match prog {
|
||||
Ok(ref output) => output,
|
||||
Err(_) => break,
|
||||
};
|
||||
if output.status.success() {
|
||||
break
|
||||
}
|
||||
let mut out = output.stderr.clone();
|
||||
out.extend(&output.stdout);
|
||||
let out = String::from_utf8_lossy(&out);
|
||||
|
||||
// Check to see if the link failed with "unrecognized command line option:
|
||||
// '-no-pie'" for gcc or "unknown argument: '-no-pie'" for clang. If so,
|
||||
// reperform the link step without the -no-pie option. This is safe because
|
||||
// if the linker doesn't support -no-pie then it should not default to
|
||||
// linking executables as pie. Different versions of gcc seem to use
|
||||
// different quotes in the error message so don't check for them.
|
||||
if sess.target.target.options.linker_is_gnu &&
|
||||
flavor != LinkerFlavor::Ld &&
|
||||
(out.contains("unrecognized command line option") ||
|
||||
out.contains("unknown argument")) &&
|
||||
out.contains("-no-pie") &&
|
||||
cmd.get_args().iter().any(|e| e.to_string_lossy() == "-no-pie") {
|
||||
for arg in cmd.take_args() {
|
||||
if arg.to_string_lossy() != "-no-pie" {
|
||||
cmd.arg(arg);
|
||||
}
|
||||
}
|
||||
continue;
|
||||
}
|
||||
if !retry_on_segfault || i > 3 {
|
||||
break
|
||||
}
|
||||
let msg_segv = "clang: error: unable to execute command: Segmentation fault: 11";
|
||||
let msg_bus = "clang: error: unable to execute command: Bus error: 10";
|
||||
if !(out.contains(msg_segv) || out.contains(msg_bus)) {
|
||||
break
|
||||
}
|
||||
}
|
||||
|
||||
match prog {
|
||||
Ok(prog) => {
|
||||
if !prog.status.success() {
|
||||
let mut output = prog.stderr.clone();
|
||||
output.extend_from_slice(&prog.stdout);
|
||||
sess.struct_err(&format!("linking with `{}` failed: {}",
|
||||
pname.display(),
|
||||
prog.status))
|
||||
.note(&format!("{:?}", &cmd))
|
||||
.note(&String::from_utf8_lossy(&output))
|
||||
.emit();
|
||||
sess.abort_if_errors();
|
||||
}
|
||||
},
|
||||
Err(e) => {
|
||||
let linker_not_found = e.kind() == io::ErrorKind::NotFound;
|
||||
|
||||
let mut linker_error = {
|
||||
if linker_not_found {
|
||||
sess.struct_err(&format!("linker `{}` not found", pname.display()))
|
||||
} else {
|
||||
sess.struct_err(&format!("could not exec the linker `{}`", pname.display()))
|
||||
}
|
||||
};
|
||||
|
||||
linker_error.note(&e.to_string());
|
||||
|
||||
if !linker_not_found {
|
||||
linker_error.note(&format!("{:?}", &cmd));
|
||||
}
|
||||
|
||||
linker_error.emit();
|
||||
|
||||
if sess.target.target.options.is_like_msvc && linker_not_found {
|
||||
sess.note_without_error("the msvc targets depend on the msvc linker \
|
||||
but `link.exe` was not found");
|
||||
sess.note_without_error("please ensure that VS 2013, VS 2015 or VS 2017 \
|
||||
was installed with the Visual C++ option");
|
||||
}
|
||||
sess.abort_if_errors();
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
// On macOS, debuggers need this utility to get run to do some munging of
|
||||
// the symbols. Note, though, that if the object files are being preserved
|
||||
// for their debug information there's no need for us to run dsymutil.
|
||||
if sess.target.target.options.is_like_osx &&
|
||||
sess.opts.debuginfo != DebugInfo::None
|
||||
{
|
||||
match Command::new("dsymutil").arg(out_filename).output() {
|
||||
Ok(..) => {}
|
||||
Err(e) => sess.fatal(&format!("failed to run dsymutil: {}", e)),
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
res.artifact
|
||||
.declare_with(
|
||||
&metadata_name,
|
||||
faerie::artifact::Decl::Data {
|
||||
global: true,
|
||||
writable: false,
|
||||
fn link_args(cmd: &mut dyn Linker,
|
||||
flavor: LinkerFlavor,
|
||||
sess: &Session,
|
||||
crate_type: config::CrateType,
|
||||
tmpdir: &Path,
|
||||
out_filename: &Path,
|
||||
codegen_results: &CodegenResults) {
|
||||
|
||||
// Linker plugins should be specified early in the list of arguments
|
||||
cmd.cross_lang_lto();
|
||||
|
||||
// The default library location, we need this to find the runtime.
|
||||
// The location of crates will be determined as needed.
|
||||
let lib_path = sess.target_filesearch(PathKind::All).get_lib_path();
|
||||
|
||||
// target descriptor
|
||||
let t = &sess.target.target;
|
||||
|
||||
cmd.include_path(&fix_windows_verbatim_for_gcc(&lib_path));
|
||||
for obj in codegen_results.modules.iter().filter_map(|m| m.object.as_ref()) {
|
||||
cmd.add_object(obj);
|
||||
}
|
||||
cmd.output_filename(out_filename);
|
||||
|
||||
// If we're building a dynamic library then some platforms need to make sure
|
||||
// that all symbols are exported correctly from the dynamic library.
|
||||
if crate_type != config::CrateType::Executable ||
|
||||
sess.target.target.options.is_like_emscripten {
|
||||
cmd.export_symbols(tmpdir, crate_type);
|
||||
}
|
||||
|
||||
let obj = codegen_results.allocator_module
|
||||
.as_ref()
|
||||
.and_then(|m| m.object.as_ref());
|
||||
if let Some(obj) = obj {
|
||||
cmd.add_object(obj);
|
||||
}
|
||||
|
||||
// Try to strip as much out of the generated object by removing unused
|
||||
// sections if possible. See more comments in linker.rs
|
||||
if !sess.opts.cg.link_dead_code {
|
||||
let keep_metadata = crate_type == config::CrateType::Dylib;
|
||||
cmd.gc_sections(keep_metadata);
|
||||
}
|
||||
|
||||
let used_link_args = &codegen_results.crate_info.link_args;
|
||||
|
||||
if crate_type == config::CrateType::Executable {
|
||||
let mut position_independent_executable = false;
|
||||
|
||||
if t.options.position_independent_executables {
|
||||
let empty_vec = Vec::new();
|
||||
let args = sess.opts.cg.link_args.as_ref().unwrap_or(&empty_vec);
|
||||
let more_args = &sess.opts.cg.link_arg;
|
||||
let mut args = args.iter().chain(more_args.iter()).chain(used_link_args.iter());
|
||||
|
||||
if !sess.crt_static() && !args.any(|x| *x == "-static") {
|
||||
position_independent_executable = true;
|
||||
}
|
||||
}
|
||||
|
||||
if position_independent_executable {
|
||||
cmd.position_independent_executable();
|
||||
} else {
|
||||
// recent versions of gcc can be configured to generate position
|
||||
// independent executables by default. We have to pass -no-pie to
|
||||
// explicitly turn that off. Not applicable to ld.
|
||||
if sess.target.target.options.linker_is_gnu
|
||||
&& flavor != LinkerFlavor::Ld {
|
||||
cmd.no_position_independent_executable();
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
let relro_level = match sess.opts.debugging_opts.relro_level {
|
||||
Some(level) => level,
|
||||
None => t.options.relro_level,
|
||||
};
|
||||
match relro_level {
|
||||
RelroLevel::Full => {
|
||||
cmd.full_relro();
|
||||
},
|
||||
res.metadata.clone(),
|
||||
)
|
||||
.unwrap();
|
||||
*/
|
||||
RelroLevel::Partial => {
|
||||
cmd.partial_relro();
|
||||
},
|
||||
RelroLevel::Off => {
|
||||
cmd.no_relro();
|
||||
},
|
||||
RelroLevel::None => {
|
||||
},
|
||||
}
|
||||
|
||||
// Pass optimization flags down to the linker.
|
||||
cmd.optimize();
|
||||
|
||||
// Pass debuginfo flags down to the linker.
|
||||
cmd.debuginfo();
|
||||
|
||||
// We want to, by default, prevent the compiler from accidentally leaking in
|
||||
// any system libraries, so we may explicitly ask linkers to not link to any
|
||||
// libraries by default. Note that this does not happen for windows because
|
||||
// windows pulls in some large number of libraries and I couldn't quite
|
||||
// figure out which subset we wanted.
|
||||
//
|
||||
// This is all naturally configurable via the standard methods as well.
|
||||
if !sess.opts.cg.default_linker_libraries.unwrap_or(false) &&
|
||||
t.options.no_default_libraries
|
||||
{
|
||||
cmd.no_default_libraries();
|
||||
}
|
||||
|
||||
// Take careful note of the ordering of the arguments we pass to the linker
|
||||
// here. Linkers will assume that things on the left depend on things to the
|
||||
// right. Things on the right cannot depend on things on the left. This is
|
||||
// all formally implemented in terms of resolving symbols (libs on the right
|
||||
// resolve unknown symbols of libs on the left, but not vice versa).
|
||||
//
|
||||
// For this reason, we have organized the arguments we pass to the linker as
|
||||
// such:
|
||||
//
|
||||
// 1. The local object that LLVM just generated
|
||||
// 2. Local native libraries
|
||||
// 3. Upstream rust libraries
|
||||
// 4. Upstream native libraries
|
||||
//
|
||||
// The rationale behind this ordering is that those items lower down in the
|
||||
// list can't depend on items higher up in the list. For example nothing can
|
||||
// depend on what we just generated (e.g. that'd be a circular dependency).
|
||||
// Upstream rust libraries are not allowed to depend on our local native
|
||||
// libraries as that would violate the structure of the DAG, in that
|
||||
// scenario they are required to link to them as well in a shared fashion.
|
||||
//
|
||||
// Note that upstream rust libraries may contain native dependencies as
|
||||
// well, but they also can't depend on what we just started to add to the
|
||||
// link line. And finally upstream native libraries can't depend on anything
|
||||
// in this DAG so far because they're only dylibs and dylibs can only depend
|
||||
// on other dylibs (e.g. other native deps).
|
||||
add_local_native_libraries(cmd, sess, codegen_results);
|
||||
add_upstream_rust_crates(cmd, sess, codegen_results, crate_type, tmpdir);
|
||||
add_upstream_native_libraries(cmd, sess, codegen_results, crate_type);
|
||||
|
||||
// Tell the linker what we're doing.
|
||||
if crate_type != config::CrateType::Executable {
|
||||
cmd.build_dylib(out_filename);
|
||||
}
|
||||
if crate_type == config::CrateType::Executable && sess.crt_static() {
|
||||
cmd.build_static_executable();
|
||||
}
|
||||
|
||||
if sess.opts.debugging_opts.pgo_gen.is_some() {
|
||||
cmd.pgo_gen();
|
||||
}
|
||||
|
||||
// Finally add all the linker arguments provided on the command line along
|
||||
// with any #[link_args] attributes found inside the crate
|
||||
if let Some(ref args) = sess.opts.cg.link_args {
|
||||
cmd.args(args);
|
||||
}
|
||||
cmd.args(&sess.opts.cg.link_arg);
|
||||
cmd.args(&used_link_args);
|
||||
}
|
||||
|
||||
777
src/link_copied.rs
Normal file
777
src/link_copied.rs
Normal file
@ -0,0 +1,777 @@
|
||||
//! All functions here are copied from https://github.com/rust-lang/rust/blob/942864a000efd74b73e36bda5606b2cdb55ecf39/src/librustc_codegen_llvm/back/link.rs
|
||||
|
||||
use std::env;
|
||||
use std::fmt;
|
||||
use std::fs;
|
||||
use std::io;
|
||||
use std::iter;
|
||||
use std::path::{Path, PathBuf};
|
||||
use std::process::{Output, Stdio};
|
||||
|
||||
use cc::windows_registry;
|
||||
|
||||
use rustc::middle::cstore::{NativeLibrary, NativeLibraryKind};
|
||||
use rustc::middle::dependency_format::Linkage;
|
||||
use rustc::session::config::{self, OutputType, RUST_CGU_EXT};
|
||||
use rustc::session::search_paths::PathKind;
|
||||
use rustc::session::Session;
|
||||
use rustc::util::common::time;
|
||||
use rustc_codegen_utils::command::Command;
|
||||
use rustc_codegen_utils::linker::*;
|
||||
use rustc_data_structures::fx::FxHashSet;
|
||||
use rustc_fs_util::fix_windows_verbatim_for_gcc;
|
||||
use rustc_target::spec::LinkerFlavor;
|
||||
use syntax::attr;
|
||||
|
||||
use crate::prelude::*;
|
||||
|
||||
use crate::archive::{ArchiveBuilder, ArchiveConfig};
|
||||
use crate::metadata::METADATA_FILENAME;
|
||||
|
||||
|
||||
// cg_clif doesn't have bytecode, so this is just a dummy
|
||||
const RLIB_BYTECODE_EXTENSION: &str = ".cg_clif_bytecode_dummy";
|
||||
|
||||
fn archive_search_paths(sess: &Session) -> Vec<PathBuf> {
|
||||
let mut search = Vec::new();
|
||||
sess.target_filesearch(PathKind::Native).for_each_lib_search_path(|path, _| {
|
||||
search.push(path.to_path_buf());
|
||||
});
|
||||
return search;
|
||||
}
|
||||
|
||||
fn archive_config<'a>(sess: &'a Session,
|
||||
output: &Path,
|
||||
input: Option<&Path>) -> ArchiveConfig<'a> {
|
||||
ArchiveConfig {
|
||||
sess,
|
||||
dst: output.to_path_buf(),
|
||||
src: input.map(|p| p.to_path_buf()),
|
||||
lib_search_paths: archive_search_paths(sess),
|
||||
}
|
||||
}
|
||||
|
||||
// The third parameter is for env vars, used on windows to set up the
|
||||
// path for MSVC to find its DLLs, and gcc to find its bundled
|
||||
// toolchain
|
||||
pub fn get_linker(sess: &Session, linker: &Path, flavor: LinkerFlavor) -> (PathBuf, Command) {
|
||||
let msvc_tool = windows_registry::find_tool(&sess.opts.target_triple.triple(), "link.exe");
|
||||
|
||||
// If our linker looks like a batch script on Windows then to execute this
|
||||
// we'll need to spawn `cmd` explicitly. This is primarily done to handle
|
||||
// emscripten where the linker is `emcc.bat` and needs to be spawned as
|
||||
// `cmd /c emcc.bat ...`.
|
||||
//
|
||||
// This worked historically but is needed manually since #42436 (regression
|
||||
// was tagged as #42791) and some more info can be found on #44443 for
|
||||
// emscripten itself.
|
||||
let mut cmd = match linker.to_str() {
|
||||
Some(linker) if cfg!(windows) && linker.ends_with(".bat") => Command::bat_script(linker),
|
||||
_ => match flavor {
|
||||
LinkerFlavor::Lld(f) => Command::lld(linker, f),
|
||||
LinkerFlavor::Msvc
|
||||
if sess.opts.cg.linker.is_none() && sess.target.target.options.linker.is_none() =>
|
||||
{
|
||||
Command::new(msvc_tool.as_ref().map(|t| t.path()).unwrap_or(linker))
|
||||
},
|
||||
_ => Command::new(linker),
|
||||
}
|
||||
};
|
||||
|
||||
// The compiler's sysroot often has some bundled tools, so add it to the
|
||||
// PATH for the child.
|
||||
let mut new_path = sess.host_filesearch(PathKind::All)
|
||||
.get_tools_search_paths();
|
||||
let mut msvc_changed_path = false;
|
||||
if sess.target.target.options.is_like_msvc {
|
||||
if let Some(ref tool) = msvc_tool {
|
||||
cmd.args(tool.args());
|
||||
for &(ref k, ref v) in tool.env() {
|
||||
if k == "PATH" {
|
||||
new_path.extend(env::split_paths(v));
|
||||
msvc_changed_path = true;
|
||||
} else {
|
||||
cmd.env(k, v);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
if !msvc_changed_path {
|
||||
if let Some(path) = env::var_os("PATH") {
|
||||
new_path.extend(env::split_paths(&path));
|
||||
}
|
||||
}
|
||||
cmd.env("PATH", env::join_paths(new_path).unwrap());
|
||||
|
||||
(linker.to_path_buf(), cmd)
|
||||
}
|
||||
|
||||
pub fn linker_and_flavor(sess: &Session) -> (PathBuf, LinkerFlavor) {
|
||||
fn infer_from(
|
||||
sess: &Session,
|
||||
linker: Option<PathBuf>,
|
||||
flavor: Option<LinkerFlavor>,
|
||||
) -> Option<(PathBuf, LinkerFlavor)> {
|
||||
match (linker, flavor) {
|
||||
(Some(linker), Some(flavor)) => Some((linker, flavor)),
|
||||
// only the linker flavor is known; use the default linker for the selected flavor
|
||||
(None, Some(flavor)) => Some((PathBuf::from(match flavor {
|
||||
LinkerFlavor::Em => if cfg!(windows) { "emcc.bat" } else { "emcc" },
|
||||
LinkerFlavor::Gcc => "cc",
|
||||
LinkerFlavor::Ld => "ld",
|
||||
LinkerFlavor::Msvc => "link.exe",
|
||||
LinkerFlavor::Lld(_) => "lld",
|
||||
}), flavor)),
|
||||
(Some(linker), None) => {
|
||||
let stem = linker.file_stem().and_then(|stem| stem.to_str()).unwrap_or_else(|| {
|
||||
sess.fatal("couldn't extract file stem from specified linker");
|
||||
}).to_owned();
|
||||
|
||||
let flavor = if stem == "emcc" {
|
||||
LinkerFlavor::Em
|
||||
} else if stem == "gcc" || stem.ends_with("-gcc") {
|
||||
LinkerFlavor::Gcc
|
||||
} else if stem == "ld" || stem == "ld.lld" || stem.ends_with("-ld") {
|
||||
LinkerFlavor::Ld
|
||||
} else if stem == "link" || stem == "lld-link" {
|
||||
LinkerFlavor::Msvc
|
||||
} else if stem == "lld" || stem == "rust-lld" {
|
||||
LinkerFlavor::Lld(sess.target.target.options.lld_flavor)
|
||||
} else {
|
||||
// fall back to the value in the target spec
|
||||
sess.target.target.linker_flavor
|
||||
};
|
||||
|
||||
Some((linker, flavor))
|
||||
},
|
||||
(None, None) => None,
|
||||
}
|
||||
}
|
||||
|
||||
// linker and linker flavor specified via command line have precedence over what the target
|
||||
// specification specifies
|
||||
if let Some(ret) = infer_from(
|
||||
sess,
|
||||
sess.opts.cg.linker.clone(),
|
||||
sess.opts.debugging_opts.linker_flavor,
|
||||
) {
|
||||
return ret;
|
||||
}
|
||||
|
||||
if let Some(ret) = infer_from(
|
||||
sess,
|
||||
sess.target.target.options.linker.clone().map(PathBuf::from),
|
||||
Some(sess.target.target.linker_flavor),
|
||||
) {
|
||||
return ret;
|
||||
}
|
||||
|
||||
bug!("Not enough information provided to determine how to invoke the linker");
|
||||
}
|
||||
|
||||
pub fn exec_linker(sess: &Session, cmd: &mut Command, out_filename: &Path, tmpdir: &Path)
|
||||
-> io::Result<Output>
|
||||
{
|
||||
// When attempting to spawn the linker we run a risk of blowing out the
|
||||
// size limits for spawning a new process with respect to the arguments
|
||||
// we pass on the command line.
|
||||
//
|
||||
// Here we attempt to handle errors from the OS saying "your list of
|
||||
// arguments is too big" by reinvoking the linker again with an `@`-file
|
||||
// that contains all the arguments. The theory is that this is then
|
||||
// accepted on all linkers and the linker will read all its options out of
|
||||
// there instead of looking at the command line.
|
||||
if !cmd.very_likely_to_exceed_some_spawn_limit() {
|
||||
match cmd.command().stdout(Stdio::piped()).stderr(Stdio::piped()).spawn() {
|
||||
Ok(child) => {
|
||||
let output = child.wait_with_output();
|
||||
flush_linked_file(&output, out_filename)?;
|
||||
return output;
|
||||
}
|
||||
Err(ref e) if command_line_too_big(e) => {
|
||||
info!("command line to linker was too big: {}", e);
|
||||
}
|
||||
Err(e) => return Err(e)
|
||||
}
|
||||
}
|
||||
|
||||
info!("falling back to passing arguments to linker via an @-file");
|
||||
let mut cmd2 = cmd.clone();
|
||||
let mut args = String::new();
|
||||
for arg in cmd2.take_args() {
|
||||
args.push_str(&Escape {
|
||||
arg: arg.to_str().unwrap(),
|
||||
is_like_msvc: sess.target.target.options.is_like_msvc,
|
||||
}.to_string());
|
||||
args.push_str("\n");
|
||||
}
|
||||
let file = tmpdir.join("linker-arguments");
|
||||
let bytes = if sess.target.target.options.is_like_msvc {
|
||||
let mut out = Vec::with_capacity((1 + args.len()) * 2);
|
||||
// start the stream with a UTF-16 BOM
|
||||
for c in iter::once(0xFEFF).chain(args.encode_utf16()) {
|
||||
// encode in little endian
|
||||
out.push(c as u8);
|
||||
out.push((c >> 8) as u8);
|
||||
}
|
||||
out
|
||||
} else {
|
||||
args.into_bytes()
|
||||
};
|
||||
fs::write(&file, &bytes)?;
|
||||
cmd2.arg(format!("@{}", file.display()));
|
||||
info!("invoking linker {:?}", cmd2);
|
||||
let output = cmd2.output();
|
||||
flush_linked_file(&output, out_filename)?;
|
||||
return output;
|
||||
|
||||
#[cfg(unix)]
|
||||
fn flush_linked_file(_: &io::Result<Output>, _: &Path) -> io::Result<()> {
|
||||
Ok(())
|
||||
}
|
||||
|
||||
#[cfg(windows)]
|
||||
fn flush_linked_file(command_output: &io::Result<Output>, out_filename: &Path)
|
||||
-> io::Result<()>
|
||||
{
|
||||
// On Windows, under high I/O load, output buffers are sometimes not flushed,
|
||||
// even long after process exit, causing nasty, non-reproducible output bugs.
|
||||
//
|
||||
// File::sync_all() calls FlushFileBuffers() down the line, which solves the problem.
|
||||
//
|
||||
// А full writeup of the original Chrome bug can be found at
|
||||
// randomascii.wordpress.com/2018/02/25/compiler-bug-linker-bug-windows-kernel-bug/amp
|
||||
|
||||
if let &Ok(ref out) = command_output {
|
||||
if out.status.success() {
|
||||
if let Ok(of) = fs::OpenOptions::new().write(true).open(out_filename) {
|
||||
of.sync_all()?;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
Ok(())
|
||||
}
|
||||
|
||||
#[cfg(unix)]
|
||||
fn command_line_too_big(err: &io::Error) -> bool {
|
||||
err.raw_os_error() == Some(::libc::E2BIG)
|
||||
}
|
||||
|
||||
#[cfg(windows)]
|
||||
fn command_line_too_big(err: &io::Error) -> bool {
|
||||
const ERROR_FILENAME_EXCED_RANGE: i32 = 206;
|
||||
err.raw_os_error() == Some(ERROR_FILENAME_EXCED_RANGE)
|
||||
}
|
||||
|
||||
struct Escape<'a> {
|
||||
arg: &'a str,
|
||||
is_like_msvc: bool,
|
||||
}
|
||||
|
||||
impl<'a> fmt::Display for Escape<'a> {
|
||||
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
|
||||
if self.is_like_msvc {
|
||||
// This is "documented" at
|
||||
// https://msdn.microsoft.com/en-us/library/4xdcbak7.aspx
|
||||
//
|
||||
// Unfortunately there's not a great specification of the
|
||||
// syntax I could find online (at least) but some local
|
||||
// testing showed that this seemed sufficient-ish to catch
|
||||
// at least a few edge cases.
|
||||
write!(f, "\"")?;
|
||||
for c in self.arg.chars() {
|
||||
match c {
|
||||
'"' => write!(f, "\\{}", c)?,
|
||||
c => write!(f, "{}", c)?,
|
||||
}
|
||||
}
|
||||
write!(f, "\"")?;
|
||||
} else {
|
||||
// This is documented at https://linux.die.net/man/1/ld, namely:
|
||||
//
|
||||
// > Options in file are separated by whitespace. A whitespace
|
||||
// > character may be included in an option by surrounding the
|
||||
// > entire option in either single or double quotes. Any
|
||||
// > character (including a backslash) may be included by
|
||||
// > prefixing the character to be included with a backslash.
|
||||
//
|
||||
// We put an argument on each line, so all we need to do is
|
||||
// ensure the line is interpreted as one whole argument.
|
||||
for c in self.arg.chars() {
|
||||
match c {
|
||||
'\\' |
|
||||
' ' => write!(f, "\\{}", c)?,
|
||||
c => write!(f, "{}", c)?,
|
||||
}
|
||||
}
|
||||
}
|
||||
Ok(())
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// # Rust Crate linking
|
||||
//
|
||||
// Rust crates are not considered at all when creating an rlib output. All
|
||||
// dependencies will be linked when producing the final output (instead of
|
||||
// the intermediate rlib version)
|
||||
pub fn add_upstream_rust_crates(cmd: &mut dyn Linker,
|
||||
sess: &Session,
|
||||
codegen_results: &CodegenResults,
|
||||
crate_type: config::CrateType,
|
||||
tmpdir: &Path) {
|
||||
// All of the heavy lifting has previously been accomplished by the
|
||||
// dependency_format module of the compiler. This is just crawling the
|
||||
// output of that module, adding crates as necessary.
|
||||
//
|
||||
// Linking to a rlib involves just passing it to the linker (the linker
|
||||
// will slurp up the object files inside), and linking to a dynamic library
|
||||
// involves just passing the right -l flag.
|
||||
|
||||
let formats = sess.dependency_formats.borrow();
|
||||
let data = formats.get(&crate_type).unwrap();
|
||||
|
||||
// Invoke get_used_crates to ensure that we get a topological sorting of
|
||||
// crates.
|
||||
let deps = &codegen_results.crate_info.used_crates_dynamic;
|
||||
|
||||
// There's a few internal crates in the standard library (aka libcore and
|
||||
// libstd) which actually have a circular dependence upon one another. This
|
||||
// currently arises through "weak lang items" where libcore requires things
|
||||
// like `rust_begin_unwind` but libstd ends up defining it. To get this
|
||||
// circular dependence to work correctly in all situations we'll need to be
|
||||
// sure to correctly apply the `--start-group` and `--end-group` options to
|
||||
// GNU linkers, otherwise if we don't use any other symbol from the standard
|
||||
// library it'll get discarded and the whole application won't link.
|
||||
//
|
||||
// In this loop we're calculating the `group_end`, after which crate to
|
||||
// pass `--end-group` and `group_start`, before which crate to pass
|
||||
// `--start-group`. We currently do this by passing `--end-group` after
|
||||
// the first crate (when iterating backwards) that requires a lang item
|
||||
// defined somewhere else. Once that's set then when we've defined all the
|
||||
// necessary lang items we'll pass `--start-group`.
|
||||
//
|
||||
// Note that this isn't amazing logic for now but it should do the trick
|
||||
// for the current implementation of the standard library.
|
||||
let mut group_end = None;
|
||||
let mut group_start = None;
|
||||
let mut end_with = FxHashSet::default();
|
||||
let info = &codegen_results.crate_info;
|
||||
for &(cnum, _) in deps.iter().rev() {
|
||||
if let Some(missing) = info.missing_lang_items.get(&cnum) {
|
||||
end_with.extend(missing.iter().cloned());
|
||||
if end_with.len() > 0 && group_end.is_none() {
|
||||
group_end = Some(cnum);
|
||||
}
|
||||
}
|
||||
end_with.retain(|item| info.lang_item_to_crate.get(item) != Some(&cnum));
|
||||
if end_with.len() == 0 && group_end.is_some() {
|
||||
group_start = Some(cnum);
|
||||
break
|
||||
}
|
||||
}
|
||||
|
||||
// If we didn't end up filling in all lang items from upstream crates then
|
||||
// we'll be filling it in with our crate. This probably means we're the
|
||||
// standard library itself, so skip this for now.
|
||||
if group_end.is_some() && group_start.is_none() {
|
||||
group_end = None;
|
||||
}
|
||||
|
||||
let mut compiler_builtins = None;
|
||||
|
||||
for &(cnum, _) in deps.iter() {
|
||||
if group_start == Some(cnum) {
|
||||
cmd.group_start();
|
||||
}
|
||||
|
||||
// We may not pass all crates through to the linker. Some crates may
|
||||
// appear statically in an existing dylib, meaning we'll pick up all the
|
||||
// symbols from the dylib.
|
||||
let src = &codegen_results.crate_info.used_crate_source[&cnum];
|
||||
match data[cnum.as_usize() - 1] {
|
||||
_ if codegen_results.crate_info.profiler_runtime == Some(cnum) => {
|
||||
add_static_crate(cmd, sess, codegen_results, tmpdir, crate_type, cnum);
|
||||
}
|
||||
_ if codegen_results.crate_info.sanitizer_runtime == Some(cnum) => {
|
||||
link_sanitizer_runtime(cmd, sess, codegen_results, tmpdir, cnum);
|
||||
}
|
||||
// compiler-builtins are always placed last to ensure that they're
|
||||
// linked correctly.
|
||||
_ if codegen_results.crate_info.compiler_builtins == Some(cnum) => {
|
||||
assert!(compiler_builtins.is_none());
|
||||
compiler_builtins = Some(cnum);
|
||||
}
|
||||
Linkage::NotLinked |
|
||||
Linkage::IncludedFromDylib => {}
|
||||
Linkage::Static => {
|
||||
add_static_crate(cmd, sess, codegen_results, tmpdir, crate_type, cnum);
|
||||
}
|
||||
Linkage::Dynamic => {
|
||||
add_dynamic_crate(cmd, sess, &src.dylib.as_ref().unwrap().0)
|
||||
}
|
||||
}
|
||||
|
||||
if group_end == Some(cnum) {
|
||||
cmd.group_end();
|
||||
}
|
||||
}
|
||||
|
||||
// compiler-builtins are always placed last to ensure that they're
|
||||
// linked correctly.
|
||||
// We must always link the `compiler_builtins` crate statically. Even if it
|
||||
// was already "included" in a dylib (e.g. `libstd` when `-C prefer-dynamic`
|
||||
// is used)
|
||||
if let Some(cnum) = compiler_builtins {
|
||||
add_static_crate(cmd, sess, codegen_results, tmpdir, crate_type, cnum);
|
||||
}
|
||||
|
||||
// Converts a library file-stem into a cc -l argument
|
||||
fn unlib<'a>(config: &config::Config, stem: &'a str) -> &'a str {
|
||||
if stem.starts_with("lib") && !config.target.options.is_like_windows {
|
||||
&stem[3..]
|
||||
} else {
|
||||
stem
|
||||
}
|
||||
}
|
||||
|
||||
// We must link the sanitizer runtime using -Wl,--whole-archive but since
|
||||
// it's packed in a .rlib, it contains stuff that are not objects that will
|
||||
// make the linker error. So we must remove those bits from the .rlib before
|
||||
// linking it.
|
||||
fn link_sanitizer_runtime(cmd: &mut dyn Linker,
|
||||
sess: &Session,
|
||||
codegen_results: &CodegenResults,
|
||||
tmpdir: &Path,
|
||||
cnum: CrateNum) {
|
||||
let src = &codegen_results.crate_info.used_crate_source[&cnum];
|
||||
let cratepath = &src.rlib.as_ref().unwrap().0;
|
||||
|
||||
if sess.target.target.options.is_like_osx {
|
||||
// On Apple platforms, the sanitizer is always built as a dylib, and
|
||||
// LLVM will link to `@rpath/*.dylib`, so we need to specify an
|
||||
// rpath to the library as well (the rpath should be absolute, see
|
||||
// PR #41352 for details).
|
||||
//
|
||||
// FIXME: Remove this logic into librustc_*san once Cargo supports it
|
||||
let rpath = cratepath.parent().unwrap();
|
||||
let rpath = rpath.to_str().expect("non-utf8 component in path");
|
||||
cmd.args(&["-Wl,-rpath".into(), "-Xlinker".into(), rpath.into()]);
|
||||
}
|
||||
|
||||
let dst = tmpdir.join(cratepath.file_name().unwrap());
|
||||
let cfg = archive_config(sess, &dst, Some(cratepath));
|
||||
let mut archive = ArchiveBuilder::new(cfg);
|
||||
archive.update_symbols();
|
||||
|
||||
for f in archive.src_files() {
|
||||
if f.ends_with(RLIB_BYTECODE_EXTENSION) || f == METADATA_FILENAME {
|
||||
archive.remove_file(&f);
|
||||
continue
|
||||
}
|
||||
}
|
||||
|
||||
archive.build();
|
||||
|
||||
cmd.link_whole_rlib(&dst);
|
||||
}
|
||||
|
||||
// Adds the static "rlib" versions of all crates to the command line.
|
||||
// There's a bit of magic which happens here specifically related to LTO and
|
||||
// dynamic libraries. Specifically:
|
||||
//
|
||||
// * For LTO, we remove upstream object files.
|
||||
// * For dylibs we remove metadata and bytecode from upstream rlibs
|
||||
//
|
||||
// When performing LTO, almost(*) all of the bytecode from the upstream
|
||||
// libraries has already been included in our object file output. As a
|
||||
// result we need to remove the object files in the upstream libraries so
|
||||
// the linker doesn't try to include them twice (or whine about duplicate
|
||||
// symbols). We must continue to include the rest of the rlib, however, as
|
||||
// it may contain static native libraries which must be linked in.
|
||||
//
|
||||
// (*) Crates marked with `#![no_builtins]` don't participate in LTO and
|
||||
// their bytecode wasn't included. The object files in those libraries must
|
||||
// still be passed to the linker.
|
||||
//
|
||||
// When making a dynamic library, linkers by default don't include any
|
||||
// object files in an archive if they're not necessary to resolve the link.
|
||||
// We basically want to convert the archive (rlib) to a dylib, though, so we
|
||||
// *do* want everything included in the output, regardless of whether the
|
||||
// linker thinks it's needed or not. As a result we must use the
|
||||
// --whole-archive option (or the platform equivalent). When using this
|
||||
// option the linker will fail if there are non-objects in the archive (such
|
||||
// as our own metadata and/or bytecode). All in all, for rlibs to be
|
||||
// entirely included in dylibs, we need to remove all non-object files.
|
||||
//
|
||||
// Note, however, that if we're not doing LTO or we're not producing a dylib
|
||||
// (aka we're making an executable), we can just pass the rlib blindly to
|
||||
// the linker (fast) because it's fine if it's not actually included as
|
||||
// we're at the end of the dependency chain.
|
||||
fn add_static_crate(cmd: &mut dyn Linker,
|
||||
sess: &Session,
|
||||
codegen_results: &CodegenResults,
|
||||
tmpdir: &Path,
|
||||
crate_type: config::CrateType,
|
||||
cnum: CrateNum) {
|
||||
let src = &codegen_results.crate_info.used_crate_source[&cnum];
|
||||
let cratepath = &src.rlib.as_ref().unwrap().0;
|
||||
|
||||
// See the comment above in `link_staticlib` and `link_rlib` for why if
|
||||
// there's a static library that's not relevant we skip all object
|
||||
// files.
|
||||
let native_libs = &codegen_results.crate_info.native_libraries[&cnum];
|
||||
let skip_native = native_libs.iter().any(|lib| {
|
||||
lib.kind == NativeLibraryKind::NativeStatic && !relevant_lib(sess, lib)
|
||||
});
|
||||
|
||||
if (!are_upstream_rust_objects_already_included(sess) ||
|
||||
ignored_for_lto(sess, &codegen_results.crate_info, cnum)) &&
|
||||
crate_type != config::CrateType::Dylib &&
|
||||
!skip_native {
|
||||
cmd.link_rlib(&fix_windows_verbatim_for_gcc(cratepath));
|
||||
return
|
||||
}
|
||||
|
||||
let dst = tmpdir.join(cratepath.file_name().unwrap());
|
||||
let name = cratepath.file_name().unwrap().to_str().unwrap();
|
||||
let name = &name[3..name.len() - 5]; // chop off lib/.rlib
|
||||
|
||||
time(sess, &format!("altering {}.rlib", name), || {
|
||||
let cfg = archive_config(sess, &dst, Some(cratepath));
|
||||
let mut archive = ArchiveBuilder::new(cfg);
|
||||
archive.update_symbols();
|
||||
|
||||
let mut any_objects = false;
|
||||
for f in archive.src_files() {
|
||||
if f.ends_with(RLIB_BYTECODE_EXTENSION) || f == METADATA_FILENAME {
|
||||
archive.remove_file(&f);
|
||||
continue
|
||||
}
|
||||
|
||||
let canonical = f.replace("-", "_");
|
||||
let canonical_name = name.replace("-", "_");
|
||||
|
||||
// Look for `.rcgu.o` at the end of the filename to conclude
|
||||
// that this is a Rust-related object file.
|
||||
fn looks_like_rust(s: &str) -> bool {
|
||||
let path = Path::new(s);
|
||||
let ext = path.extension().and_then(|s| s.to_str());
|
||||
if ext != Some(OutputType::Object.extension()) {
|
||||
return false
|
||||
}
|
||||
let ext2 = path.file_stem()
|
||||
.and_then(|s| Path::new(s).extension())
|
||||
.and_then(|s| s.to_str());
|
||||
ext2 == Some(RUST_CGU_EXT)
|
||||
}
|
||||
|
||||
let is_rust_object =
|
||||
canonical.starts_with(&canonical_name) &&
|
||||
looks_like_rust(&f);
|
||||
|
||||
// If we've been requested to skip all native object files
|
||||
// (those not generated by the rust compiler) then we can skip
|
||||
// this file. See above for why we may want to do this.
|
||||
let skip_because_cfg_say_so = skip_native && !is_rust_object;
|
||||
|
||||
// If we're performing LTO and this is a rust-generated object
|
||||
// file, then we don't need the object file as it's part of the
|
||||
// LTO module. Note that `#![no_builtins]` is excluded from LTO,
|
||||
// though, so we let that object file slide.
|
||||
let skip_because_lto = are_upstream_rust_objects_already_included(sess) &&
|
||||
is_rust_object &&
|
||||
(sess.target.target.options.no_builtins ||
|
||||
!codegen_results.crate_info.is_no_builtins.contains(&cnum));
|
||||
|
||||
if skip_because_cfg_say_so || skip_because_lto {
|
||||
archive.remove_file(&f);
|
||||
} else {
|
||||
any_objects = true;
|
||||
}
|
||||
}
|
||||
|
||||
if !any_objects {
|
||||
return
|
||||
}
|
||||
archive.build();
|
||||
|
||||
// If we're creating a dylib, then we need to include the
|
||||
// whole of each object in our archive into that artifact. This is
|
||||
// because a `dylib` can be reused as an intermediate artifact.
|
||||
//
|
||||
// Note, though, that we don't want to include the whole of a
|
||||
// compiler-builtins crate (e.g. compiler-rt) because it'll get
|
||||
// repeatedly linked anyway.
|
||||
if crate_type == config::CrateType::Dylib &&
|
||||
codegen_results.crate_info.compiler_builtins != Some(cnum) {
|
||||
cmd.link_whole_rlib(&fix_windows_verbatim_for_gcc(&dst));
|
||||
} else {
|
||||
cmd.link_rlib(&fix_windows_verbatim_for_gcc(&dst));
|
||||
}
|
||||
});
|
||||
}
|
||||
|
||||
// Same thing as above, but for dynamic crates instead of static crates.
|
||||
fn add_dynamic_crate(cmd: &mut dyn Linker, sess: &Session, cratepath: &Path) {
|
||||
// If we're performing LTO, then it should have been previously required
|
||||
// that all upstream rust dependencies were available in an rlib format.
|
||||
assert!(!are_upstream_rust_objects_already_included(sess));
|
||||
|
||||
// Just need to tell the linker about where the library lives and
|
||||
// what its name is
|
||||
let parent = cratepath.parent();
|
||||
if let Some(dir) = parent {
|
||||
cmd.include_path(&fix_windows_verbatim_for_gcc(dir));
|
||||
}
|
||||
let filestem = cratepath.file_stem().unwrap().to_str().unwrap();
|
||||
cmd.link_rust_dylib(&unlib(&sess.target, filestem),
|
||||
parent.unwrap_or(Path::new("")));
|
||||
}
|
||||
}
|
||||
|
||||
// # Native library linking
|
||||
//
|
||||
// User-supplied library search paths (-L on the command line). These are
|
||||
// the same paths used to find Rust crates, so some of them may have been
|
||||
// added already by the previous crate linking code. This only allows them
|
||||
// to be found at compile time so it is still entirely up to outside
|
||||
// forces to make sure that library can be found at runtime.
|
||||
//
|
||||
// Also note that the native libraries linked here are only the ones located
|
||||
// in the current crate. Upstream crates with native library dependencies
|
||||
// may have their native library pulled in above.
|
||||
pub fn add_local_native_libraries(cmd: &mut dyn Linker,
|
||||
sess: &Session,
|
||||
codegen_results: &CodegenResults) {
|
||||
sess.target_filesearch(PathKind::All).for_each_lib_search_path(|path, k| {
|
||||
match k {
|
||||
PathKind::Framework => { cmd.framework_path(path); }
|
||||
_ => { cmd.include_path(&fix_windows_verbatim_for_gcc(path)); }
|
||||
}
|
||||
});
|
||||
|
||||
let relevant_libs = codegen_results.crate_info.used_libraries.iter().filter(|l| {
|
||||
relevant_lib(sess, l)
|
||||
});
|
||||
|
||||
let search_path = archive_search_paths(sess);
|
||||
for lib in relevant_libs {
|
||||
let name = match lib.name {
|
||||
Some(ref l) => l,
|
||||
None => continue,
|
||||
};
|
||||
match lib.kind {
|
||||
NativeLibraryKind::NativeUnknown => cmd.link_dylib(&name.as_str()),
|
||||
NativeLibraryKind::NativeFramework => cmd.link_framework(&name.as_str()),
|
||||
NativeLibraryKind::NativeStaticNobundle => cmd.link_staticlib(&name.as_str()),
|
||||
NativeLibraryKind::NativeStatic => cmd.link_whole_staticlib(&name.as_str(),
|
||||
&search_path)
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// Link in all of our upstream crates' native dependencies. Remember that
|
||||
// all of these upstream native dependencies are all non-static
|
||||
// dependencies. We've got two cases then:
|
||||
//
|
||||
// 1. The upstream crate is an rlib. In this case we *must* link in the
|
||||
// native dependency because the rlib is just an archive.
|
||||
//
|
||||
// 2. The upstream crate is a dylib. In order to use the dylib, we have to
|
||||
// have the dependency present on the system somewhere. Thus, we don't
|
||||
// gain a whole lot from not linking in the dynamic dependency to this
|
||||
// crate as well.
|
||||
//
|
||||
// The use case for this is a little subtle. In theory the native
|
||||
// dependencies of a crate are purely an implementation detail of the crate
|
||||
// itself, but the problem arises with generic and inlined functions. If a
|
||||
// generic function calls a native function, then the generic function must
|
||||
// be instantiated in the target crate, meaning that the native symbol must
|
||||
// also be resolved in the target crate.
|
||||
pub fn add_upstream_native_libraries(cmd: &mut dyn Linker,
|
||||
sess: &Session,
|
||||
codegen_results: &CodegenResults,
|
||||
crate_type: config::CrateType) {
|
||||
// Be sure to use a topological sorting of crates because there may be
|
||||
// interdependencies between native libraries. When passing -nodefaultlibs,
|
||||
// for example, almost all native libraries depend on libc, so we have to
|
||||
// make sure that's all the way at the right (liblibc is near the base of
|
||||
// the dependency chain).
|
||||
//
|
||||
// This passes RequireStatic, but the actual requirement doesn't matter,
|
||||
// we're just getting an ordering of crate numbers, we're not worried about
|
||||
// the paths.
|
||||
let formats = sess.dependency_formats.borrow();
|
||||
let data = formats.get(&crate_type).unwrap();
|
||||
|
||||
let crates = &codegen_results.crate_info.used_crates_static;
|
||||
for &(cnum, _) in crates {
|
||||
for lib in codegen_results.crate_info.native_libraries[&cnum].iter() {
|
||||
let name = match lib.name {
|
||||
Some(ref l) => l,
|
||||
None => continue,
|
||||
};
|
||||
if !relevant_lib(sess, &lib) {
|
||||
continue
|
||||
}
|
||||
match lib.kind {
|
||||
NativeLibraryKind::NativeUnknown => cmd.link_dylib(&name.as_str()),
|
||||
NativeLibraryKind::NativeFramework => cmd.link_framework(&name.as_str()),
|
||||
NativeLibraryKind::NativeStaticNobundle => {
|
||||
// Link "static-nobundle" native libs only if the crate they originate from
|
||||
// is being linked statically to the current crate. If it's linked dynamically
|
||||
// or is an rlib already included via some other dylib crate, the symbols from
|
||||
// native libs will have already been included in that dylib.
|
||||
if data[cnum.as_usize() - 1] == Linkage::Static {
|
||||
cmd.link_staticlib(&name.as_str())
|
||||
}
|
||||
},
|
||||
// ignore statically included native libraries here as we've
|
||||
// already included them when we included the rust library
|
||||
// previously
|
||||
NativeLibraryKind::NativeStatic => {}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/// Returns a boolean indicating whether the specified crate should be ignored
|
||||
/// during LTO.
|
||||
///
|
||||
/// Crates ignored during LTO are not lumped together in the "massive object
|
||||
/// file" that we create and are linked in their normal rlib states. See
|
||||
/// comments below for what crates do not participate in LTO.
|
||||
///
|
||||
/// It's unusual for a crate to not participate in LTO. Typically only
|
||||
/// compiler-specific and unstable crates have a reason to not participate in
|
||||
/// LTO.
|
||||
fn ignored_for_lto(sess: &Session, info: &CrateInfo, cnum: CrateNum) -> bool {
|
||||
// If our target enables builtin function lowering in LLVM then the
|
||||
// crates providing these functions don't participate in LTO (e.g.
|
||||
// no_builtins or compiler builtins crates).
|
||||
!sess.target.target.options.no_builtins &&
|
||||
(info.is_no_builtins.contains(&cnum) || info.compiler_builtins == Some(cnum))
|
||||
}
|
||||
|
||||
fn relevant_lib(sess: &Session, lib: &NativeLibrary) -> bool {
|
||||
match lib.cfg {
|
||||
Some(ref cfg) => attr::cfg_matches(cfg, &sess.parse_sess, None),
|
||||
None => true,
|
||||
}
|
||||
}
|
||||
|
||||
fn are_upstream_rust_objects_already_included(sess: &Session) -> bool {
|
||||
match sess.lto() {
|
||||
Lto::Fat => true,
|
||||
Lto::Thin => {
|
||||
// If we defer LTO to the linker, we haven't run LTO ourselves, so
|
||||
// any upstream object files have not been copied yet.
|
||||
!sess.opts.debugging_opts.cross_lang_lto.enabled()
|
||||
}
|
||||
Lto::No |
|
||||
Lto::ThinLocal => false,
|
||||
}
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user