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[link] enable packed bundled lib in non stable cases

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This commit is contained in:
Daniil Belov 2023-01-26 17:10:13 +03:00 committed by BelovDV
parent dffea43fc1
commit 601fc8b36b
19 changed files with 145 additions and 126 deletions
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133
compiler/rustc_codegen_ssa/src/back/link.rs
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@ -270,10 +270,9 @@ pub fn each_linked_rlib(
/// Create an 'rlib'.
///
/// An rlib in its current incarnation is essentially a renamed .a file. The rlib primarily contains
/// the object file of the crate, but it also contains all of the object files from native
/// libraries. This is done by unzipping native libraries and inserting all of the contents into
/// this archive.
/// An rlib in its current incarnation is essentially a renamed .a file (with "dummy" object files).
/// The rlib primarily contains the object file of the crate, but it also some of the object files
/// from native libraries.
fn link_rlib<'a>(
sess: &'a Session,
archive_builder_builder: &dyn ArchiveBuilderBuilder,
@ -347,44 +346,23 @@ fn link_rlib<'a>(
// loaded from the libraries found here and then encode that into the
// metadata of the rlib we're generating somehow.
for lib in codegen_results.crate_info.used_libraries.iter() {
match lib.kind {
NativeLibKind::Static { bundle: None | Some(true), whole_archive: Some(true) }
if flavor == RlibFlavor::Normal && sess.opts.unstable_opts.packed_bundled_libs => {}
NativeLibKind::Static { bundle: None | Some(true), whole_archive: Some(true) }
if flavor == RlibFlavor::Normal =>
{
// Don't allow mixing +bundle with +whole_archive since an rlib may contain
// multiple native libs, some of which are +whole-archive and some of which are
// -whole-archive and it isn't clear how we can currently handle such a
// situation correctly.
// See https://github.com/rust-lang/rust/issues/88085#issuecomment-901050897
sess.emit_err(errors::IncompatibleLinkingModifiers);
}
NativeLibKind::Static { bundle: None | Some(true), .. } => {}
NativeLibKind::Static { bundle: Some(false), .. }
| NativeLibKind::Dylib { .. }
| NativeLibKind::Framework { .. }
| NativeLibKind::RawDylib
| NativeLibKind::LinkArg
| NativeLibKind::Unspecified => continue,
let NativeLibKind::Static { bundle: None | Some(true), whole_archive } = lib.kind else {
continue;
};
if whole_archive == Some(true) && !codegen_results.crate_info.feature_packed_bundled_libs {
sess.emit_err(errors::IncompatibleLinkingModifiers);
}
if let Some(name) = lib.name {
let location =
if flavor == RlibFlavor::Normal && let Some(filename) = lib.filename {
let path = find_native_static_library(filename.as_str(), true, &lib_search_paths, sess);
let src = read(path).map_err(|e| sess.emit_fatal(errors::ReadFileError {message: e }))?;
let (data, _) = create_wrapper_file(sess, b".bundled_lib".to_vec(), &src);
let wrapper_file = emit_wrapper_file(sess, &data, tmpdir, filename.as_str());
packed_bundled_libs.push(wrapper_file);
} else if let Some(name) = lib.name {
let path =
find_native_static_library(name.as_str(), lib.verbatim, &lib_search_paths, sess);
if sess.opts.unstable_opts.packed_bundled_libs && flavor == RlibFlavor::Normal {
let filename = lib.filename.unwrap();
let lib_path =
find_native_static_library(filename.as_str(), true, &lib_search_paths, sess);
let src = read(lib_path)
.map_err(|e| sess.emit_fatal(errors::ReadFileError { message: e }))?;
let (data, _) = create_wrapper_file(sess, b".bundled_lib".to_vec(), &src);
let wrapper_file = emit_wrapper_file(sess, &data, tmpdir, filename.as_str());
packed_bundled_libs.push(wrapper_file);
continue;
}
ab.add_archive(&location, Box::new(|_| false)).unwrap_or_else(|error| {
sess.emit_fatal(errors::AddNativeLibrary { library_path: location, error });
});
ab.add_archive(&path, Box::new(|_| false)).unwrap_or_else(|error| {
sess.emit_fatal(errors::AddNativeLibrary { library_path: path, error })});
}
}
@ -516,36 +494,14 @@ fn link_staticlib<'a>(
&codegen_results.crate_info,
Some(CrateType::Staticlib),
&mut |cnum, path| {
let name = codegen_results.crate_info.crate_name[&cnum];
let native_libs = &codegen_results.crate_info.native_libraries[&cnum];
// Here when we include the rlib into our staticlib we need to make a
// decision whether to include the extra object files along the way.
// These extra object files come from statically included native
// libraries, but they may be cfg'd away with #[link(cfg(..))].
//
// This unstable feature, though, only needs liblibc to work. The only
// use case there is where musl is statically included in liblibc.rlib,
// so if we don't want the included version we just need to skip it. As
// a result the logic here is that if *any* linked library is cfg'd away
// we just skip all object files.
//
// Clearly this is not sufficient for a general purpose feature, and
// we'd want to read from the library's metadata to determine which
// object files come from where and selectively skip them.
let skip_object_files = native_libs.iter().any(|lib| {
matches!(lib.kind, NativeLibKind::Static { bundle: None | Some(true), .. })
&& !relevant_lib(sess, lib)
});
let lto = are_upstream_rust_objects_already_included(sess)
&& !ignored_for_lto(sess, &codegen_results.crate_info, cnum);
// Ignoring obj file starting with the crate name
// as simple comparison is not enough - there
// might be also an extra name suffix
let obj_start = name.as_str().to_owned();
let native_libs = codegen_results.crate_info.native_libraries[&cnum].iter();
let relevant = native_libs.clone().filter(|lib| relevant_lib(sess, &lib));
let relevant_libs: FxHashSet<_> = relevant.filter_map(|lib| lib.filename).collect();
let bundled_libs: FxHashSet<_> = native_libs.filter_map(|lib| lib.filename).collect();
ab.add_archive(
path,
Box::new(move |fname: &str| {
@ -559,20 +515,25 @@ fn link_staticlib<'a>(
return true;
}
// Otherwise if this is *not* a rust object and we're skipping
// objects then skip this file
if skip_object_files
&& (!fname.starts_with(&obj_start) || !fname.ends_with(".o"))
{
// Skip objects for bundled libs.
if bundled_libs.contains(&Symbol::intern(fname)) {
return true;
}
// ok, don't skip this
false
}),
)
.unwrap();
archive_builder_builder
.extract_bundled_libs(path, tempdir.as_ref(), &relevant_libs)
.unwrap_or_else(|e| sess.emit_fatal(e));
for filename in relevant_libs {
let joined = tempdir.as_ref().join(filename.as_str());
let path = joined.as_path();
ab.add_archive(path, Box::new(|_| false)).unwrap();
}
all_native_libs
.extend(codegen_results.crate_info.native_libraries[&cnum].iter().cloned());
},
@ -2590,18 +2551,8 @@ fn add_static_crate<'a>(
cmd.link_rlib(&fix_windows_verbatim_for_gcc(path));
};
// 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| {
matches!(lib.kind, NativeLibKind::Static { bundle: None | Some(true), .. })
&& !relevant_lib(sess, lib)
});
if (!are_upstream_rust_objects_already_included(sess)
|| ignored_for_lto(sess, &codegen_results.crate_info, cnum))
&& !skip_native
if !are_upstream_rust_objects_already_included(sess)
|| ignored_for_lto(sess, &codegen_results.crate_info, cnum)
{
link_upstream(cratepath);
return;
@ -2632,17 +2583,13 @@ fn add_static_crate<'a>(
let is_rust_object =
canonical.starts_with(&canonical_name) && looks_like_rust_object_file(&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 =
upstream_rust_objects_already_included && is_rust_object && is_builtins;
if upstream_rust_objects_already_included && is_rust_object && is_builtins {
return true;
}
// We skip native libraries because:
// 1. This native libraries won't be used from the generated rlib,
@ -2653,10 +2600,6 @@ fn add_static_crate<'a>(
return true;
}
if skip_because_cfg_say_so || skip_because_lto {
return true;
}
false
}),
) {

1
compiler/rustc_codegen_ssa/src/base.rs
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@ -858,6 +858,7 @@ impl CrateInfo {
dependency_formats: tcx.dependency_formats(()).clone(),
windows_subsystem,
natvis_debugger_visualizers: Default::default(),
feature_packed_bundled_libs: tcx.features().packed_bundled_libs,
};
let crates = tcx.crates(());

1
compiler/rustc_codegen_ssa/src/lib.rs
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@ -159,6 +159,7 @@ pub struct CrateInfo {
pub dependency_formats: Lrc<Dependencies>,
pub windows_subsystem: Option<String>,
pub natvis_debugger_visualizers: BTreeSet<DebuggerVisualizerFile>,
pub feature_packed_bundled_libs: bool, // unstable feature flag.
}
#[derive(Encodable, Decodable)]

2
compiler/rustc_error_messages/locales/en-US/codegen_ssa.ftl
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@ -22,7 +22,7 @@ codegen_ssa_ignoring_output = ignoring -o because multiple .{$extension} files w
codegen_ssa_create_temp_dir = couldn't create a temp dir: {$error}
codegen_ssa_incompatible_linking_modifiers = the linking modifiers `+bundle` and `+whole-archive` are not compatible with each other when generating rlibs
codegen_ssa_incompatible_linking_modifiers = link modifiers combination `+bundle,+whole-archive` is unstable when generating rlibs
codegen_ssa_add_native_library = failed to add native library {$library_path}: {$error}

2
compiler/rustc_feature/src/active.rs
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@ -164,6 +164,8 @@ declare_features! (
(active, multiple_supertrait_upcastable, "CURRENT_RUSTC_VERSION", None, None),
/// Allows using `#[omit_gdb_pretty_printer_section]`.
(active, omit_gdb_pretty_printer_section, "1.5.0", None, None),
/// Allows using `+bundled,+whole-archive` native libs.
(active, packed_bundled_libs, "1.67.0", None, None),
/// Allows using `#[prelude_import]` on glob `use` items.
(active, prelude_import, "1.2.0", None, None),
/// Used to identify crates that contain the profiler runtime.

27
compiler/rustc_metadata/src/native_libs.rs
View File

@ -49,20 +49,21 @@ fn find_bundled_library(
name: Option<Symbol>,
verbatim: Option<bool>,
kind: NativeLibKind,
has_cfg: bool,
sess: &Session,
) -> Option<Symbol> {
if sess.opts.unstable_opts.packed_bundled_libs &&
sess.crate_types().iter().any(|ct| ct == &CrateType::Rlib || ct == &CrateType::Staticlib) &&
let NativeLibKind::Static { bundle: Some(true) | None, .. } = kind {
find_native_static_library(
name.unwrap().as_str(),
verbatim.unwrap_or(false),
&sess.target_filesearch(PathKind::Native).search_path_dirs(),
sess,
).file_name().and_then(|s| s.to_str()).map(Symbol::intern)
} else {
None
if let NativeLibKind::Static { bundle: Some(true) | None, whole_archive } = kind
&& sess.crate_types().iter().any(|t| matches!(t, &CrateType::Rlib | CrateType::Staticlib))
&& (sess.opts.unstable_opts.packed_bundled_libs || has_cfg || whole_archive == Some(true))
{
let verbatim = verbatim.unwrap_or(false);
let search_paths = &sess.target_filesearch(PathKind::Native).search_path_dirs();
return find_native_static_library(name.unwrap().as_str(), verbatim, search_paths, sess)
.file_name()
.and_then(|s| s.to_str())
.map(Symbol::intern);
}
None
}
pub(crate) fn collect(tcx: TyCtxt<'_>) -> Vec<NativeLib> {
@ -385,7 +386,7 @@ impl<'tcx> Collector<'tcx> {
let name = name.map(|(name, _)| name);
let kind = kind.unwrap_or(NativeLibKind::Unspecified);
let filename = find_bundled_library(name, verbatim, kind, sess);
let filename = find_bundled_library(name, verbatim, kind, cfg.is_some(), sess);
self.libs.push(NativeLib {
name,
filename,
@ -475,7 +476,7 @@ impl<'tcx> Collector<'tcx> {
let name = Some(Symbol::intern(new_name.unwrap_or(&passed_lib.name)));
let sess = self.tcx.sess;
let filename =
find_bundled_library(name, passed_lib.verbatim, passed_lib.kind, sess);
find_bundled_library(name, passed_lib.verbatim, passed_lib.kind, false, sess);
self.libs.push(NativeLib {
name,
filename,

1
compiler/rustc_span/src/symbol.rs
View File

@ -1049,6 +1049,7 @@ symbols! {
overlapping_marker_traits,
owned_box,
packed,
packed_bundled_libs,
panic,
panic_2015,
panic_2021,

35
tests/run-make/rlib-format-packed-bundled-libs-3/Makefile Normal file
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@ -0,0 +1,35 @@
-include ../../run-make-fulldeps/tools.mk
# ignore-cross-compile
# only-linux
# Make sure -Zpacked_bundled_libs-like behavior activates with whole-archive.
# We're using the llvm-nm instead of the system nm to ensure it is compatible
# with the LLVM bitcode generated by rustc.
NM = "$(LLVM_BIN_DIR)"/llvm-nm
all: $(call NATIVE_STATICLIB,native_dep_1) $(call NATIVE_STATICLIB,native_dep_2) $(call NATIVE_STATICLIB,native_dep_3) $(call NATIVE_STATICLIB,native_dep_4)
# test cfg with packed bundle
$(RUSTC) rust_dep_cfg.rs --crate-type=rlib -Zpacked_bundled_libs
$(RUSTC) main.rs --extern rust_dep=$(TMPDIR)/librust_dep_cfg.rlib --crate-type=staticlib --cfg should_add
$(AR) t $(TMPDIR)/librust_dep_cfg.rlib | $(CGREP) -e "libnative_dep_1.a"
$(AR) t $(TMPDIR)/librust_dep_cfg.rlib | $(CGREP) -e "libnative_dep_2.a"
$(AR) t $(TMPDIR)/libmain.a | $(CGREP) -e "libnative_dep_1.o"
$(AR) t $(TMPDIR)/libmain.a | $(CGREP) -ev "libnative_dep_2.o"
# test bundle with whole_archive
$(RUSTC) rust_dep.rs --crate-type=rlib
$(AR) t $(TMPDIR)/librust_dep.rlib | $(CGREP) -e "native_dep_1"
$(AR) t $(TMPDIR)/librust_dep.rlib | $(CGREP) -e "native_dep_3"
$(AR) t $(TMPDIR)/librust_dep.rlib | $(CGREP) -ev "native_dep_2"
$(AR) t $(TMPDIR)/librust_dep.rlib | $(CGREP) -ev "native_dep_4"
# Make sure compiler doesn't use files, that it shouldn't know about.
rm $(TMPDIR)/libnative_dep_1.a
rm $(TMPDIR)/libnative_dep_3.a
$(RUSTC) main.rs --extern rust_dep=$(TMPDIR)/librust_dep.rlib --print link-args > $(TMPDIR)/link_args
cat $(TMPDIR)/link_args | $(CGREP) -ev "native_dep_3"
cat $(TMPDIR)/link_args | $(CGREP) -e "--whole-archive.*native_dep_1.*--whole-archive.*lnative_dep_2.*no-whole-archive.*lnative_dep_4"

5
tests/run-make/rlib-format-packed-bundled-libs-3/main.rs Normal file
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@ -0,0 +1,5 @@
extern crate rust_dep;
pub fn main() {
rust_dep::rust_dep();
}

1
tests/run-make/rlib-format-packed-bundled-libs-3/native_dep_1.c Normal file
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@ -0,0 +1 @@
int native_f1() { return 1; }

1
tests/run-make/rlib-format-packed-bundled-libs-3/native_dep_2.c Normal file
View File

@ -0,0 +1 @@
int native_f2() { return 2; }

1
tests/run-make/rlib-format-packed-bundled-libs-3/native_dep_3.c Normal file
View File

@ -0,0 +1 @@
int native_f3() { return 3; }

1
tests/run-make/rlib-format-packed-bundled-libs-3/native_dep_4.c Normal file
View File

@ -0,0 +1 @@
int native_f4() { return 4; }

16
tests/run-make/rlib-format-packed-bundled-libs-3/rust_dep.rs Normal file
View File

@ -0,0 +1,16 @@
#![feature(packed_bundled_libs)]
#[link(name = "native_dep_1", kind = "static", modifiers = "+whole-archive,+bundle")]
extern "C" {}
#[link(name = "native_dep_2", kind = "static", modifiers = "+whole-archive,-bundle")]
extern "C" {}
#[link(name = "native_dep_3", kind = "static", modifiers = "+bundle")]
extern "C" {}
#[link(name = "native_dep_4", kind = "static", modifiers = "-bundle")]
extern "C" {}
#[no_mangle]
pub fn rust_dep() {}

10
tests/run-make/rlib-format-packed-bundled-libs-3/rust_dep_cfg.rs Normal file
View File

@ -0,0 +1,10 @@
#![feature(link_cfg)]
#[link(name = "native_dep_1", kind = "static", cfg(should_add))]
extern "C" {}
#[link(name = "native_dep_2", kind = "static", cfg(should_not_add))]
extern "C" {}
#[no_mangle]
pub fn rust_dep() {}

13
tests/ui/native-library-link-flags/mix-bundle-and-whole-archive-link-attr.rs
View File

@ -1,8 +1,11 @@
// compile-flags: -Zunstable-options --crate-type rlib
// gate-test-packed_bundled_libs
// ignore-wasm32-bare
// compile-flags: --crate-type rlib
// error-pattern: link modifiers combination `+bundle,+whole-archive` is unstable when generating rlibs
// build-fail
// error-pattern: the linking modifiers `+bundle` and `+whole-archive` are not compatible with each other when generating rlibs
#[link(name = "mylib", kind = "static", modifiers = "+bundle,+whole-archive")]
extern "C" { }
#[link(name = "rust_test_helpers", kind = "static", modifiers = "+bundle,+whole-archive")]
extern "C" {}
fn main() { }
fn main() {}

6
tests/ui/native-library-link-flags/mix-bundle-and-whole-archive-link-attr.stderr
View File

@ -1,6 +1,4 @@
error: the linking modifiers `+bundle` and `+whole-archive` are not compatible with each other when generating rlibs
error: link modifiers combination `+bundle,+whole-archive` is unstable when generating rlibs
error: could not find native static library `mylib`, perhaps an -L flag is missing?
error: aborting due to 2 previous errors
error: aborting due to previous error

9
tests/ui/native-library-link-flags/mix-bundle-and-whole-archive.rs
View File

@ -1,7 +1,8 @@
// Mixing +bundle and +whole-archive is not allowed
// gate-test-packed_bundled_libs
// compile-flags: -l static:+bundle,+whole-archive=mylib -Zunstable-options --crate-type rlib
// ignore-wasm32-bare
// compile-flags: -l static:+bundle,+whole-archive=rust_test_helpers --crate-type rlib
// error-pattern: link modifiers combination `+bundle,+whole-archive` is unstable when generating rlibs
// build-fail
// error-pattern: the linking modifiers `+bundle` and `+whole-archive` are not compatible with each other when generating rlibs
fn main() { }
fn main() {}

6
tests/ui/native-library-link-flags/mix-bundle-and-whole-archive.stderr
View File

@ -1,6 +1,4 @@
error: the linking modifiers `+bundle` and `+whole-archive` are not compatible with each other when generating rlibs
error: link modifiers combination `+bundle,+whole-archive` is unstable when generating rlibs
error: could not find native static library `mylib`, perhaps an -L flag is missing?
error: aborting due to 2 previous errors
error: aborting due to previous error