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test: Verify all sysroot crates are unstable
As we continue to add more crates to the compiler and use them to implement various features we want to be sure we're not accidentally expanding the API surface area of the compiler! To that end this commit adds a new `run-make` test which will attempt to `extern crate foo` all crates in the sysroot, verifying that they're all unstable. This commit discovered that the `std_shim` and `test_shim` crates were accidentally stable and fixes the situation by deleting those shims. The shims are no longer necessary due to changes in Cargo that have happened since they were originally incepted.
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14 files changed

+65
-158
lines changed

14 files changed

+65
-158
lines changed

‎src/Cargo.lock

-15
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‎src/Cargo.toml

+2-2
Original file line numberDiff line numberDiff line change
@@ -2,8 +2,8 @@
22
members = [
33
"bootstrap",
44
"rustc",
5-
"rustc/std_shim",
6-
"rustc/test_shim",
5+
"libstd",
6+
"libtest",
77
"tools/cargotest",
88
"tools/compiletest",
99
"tools/error_index_generator",

‎src/bootstrap/README.md

+2-2
Original file line numberDiff line numberDiff line change
@@ -267,8 +267,8 @@ build/
267267
The current build is unfortunately not quite as simple as `cargo build` in a
268268
directory, but rather the compiler is split into three different Cargo projects:
269269

270-
* `src/rustc/std_shim` - a project which builds and compiles libstd
271-
* `src/rustc/test_shim` - a project which builds and compiles libtest
270+
* `src/libstd` - the standard library
271+
* `src/libtest` - testing support, depends on libstd
272272
* `src/rustc` - the actual compiler itself
273273

274274
Each "project" has a corresponding Cargo.lock file with all dependencies, and

‎src/bootstrap/check.rs

+2-2
Original file line numberDiff line numberDiff line change
@@ -346,10 +346,10 @@ pub fn krate(build: &Build,
346346
krate: Option<&str>) {
347347
let (name, path, features, root) = match mode {
348348
Mode::Libstd => {
349-
("libstd", "src/rustc/std_shim", build.std_features(), "std_shim")
349+
("libstd", "src/libstd", build.std_features(), "std")
350350
}
351351
Mode::Libtest => {
352-
("libtest", "src/rustc/test_shim", String::new(), "test_shim")
352+
("libtest", "src/libtest", String::new(), "test")
353353
}
354354
Mode::Librustc => {
355355
("librustc", "src/rustc", build.rustc_features(), "rustc-main")

‎src/bootstrap/compile.rs

+2-2
Original file line numberDiff line numberDiff line change
@@ -64,7 +64,7 @@ pub fn std(build: &Build, target: &str, compiler: &Compiler) {
6464
}
6565
cargo.arg("--features").arg(features)
6666
.arg("--manifest-path")
67-
.arg(build.src.join("src/rustc/std_shim/Cargo.toml"));
67+
.arg(build.src.join("src/libstd/Cargo.toml"));
6868

6969
if let Some(target) = build.config.target_config.get(target) {
7070
if let Some(ref jemalloc) = target.jemalloc {
@@ -162,7 +162,7 @@ pub fn test(build: &Build, target: &str, compiler: &Compiler) {
162162
build.clear_if_dirty(&out_dir, &libstd_stamp(build, compiler, target));
163163
let mut cargo = build.cargo(compiler, Mode::Libtest, target, "build");
164164
cargo.arg("--manifest-path")
165-
.arg(build.src.join("src/rustc/test_shim/Cargo.toml"));
165+
.arg(build.src.join("src/libtest/Cargo.toml"));
166166
build.run(&mut cargo);
167167
update_mtime(build, &libtest_stamp(build, compiler, target));
168168
}

‎src/bootstrap/doc.rs

+2-2
Original file line numberDiff line numberDiff line change
@@ -152,7 +152,7 @@ pub fn std(build: &Build, stage: u32, target: &str) {
152152

153153
let mut cargo = build.cargo(&compiler, Mode::Libstd, target, "doc");
154154
cargo.arg("--manifest-path")
155-
.arg(build.src.join("src/rustc/std_shim/Cargo.toml"))
155+
.arg(build.src.join("src/libstd/Cargo.toml"))
156156
.arg("--features").arg(build.std_features());
157157

158158
// We don't want to build docs for internal std dependencies unless
@@ -198,7 +198,7 @@ pub fn test(build: &Build, stage: u32, target: &str) {
198198

199199
let mut cargo = build.cargo(&compiler, Mode::Libtest, target, "doc");
200200
cargo.arg("--manifest-path")
201-
.arg(build.src.join("src/rustc/test_shim/Cargo.toml"));
201+
.arg(build.src.join("src/libtest/Cargo.toml"));
202202
build.run(&mut cargo);
203203
cp_r(&out_dir, &out)
204204
}

‎src/bootstrap/metadata.rs

+2-2
Original file line numberDiff line numberDiff line change
@@ -43,8 +43,8 @@ struct ResolveNode {
4343
}
4444

4545
pub fn build(build: &mut Build) {
46-
build_krate(build, "src/rustc/std_shim");
47-
build_krate(build, "src/rustc/test_shim");
46+
build_krate(build, "src/libstd");
47+
build_krate(build, "src/libtest");
4848
build_krate(build, "src/rustc");
4949
}
5050

‎src/bootstrap/step.rs

+25-25
Original file line numberDiff line numberDiff line change
@@ -246,14 +246,14 @@ pub fn build_rules<'a>(build: &'a Build) -> Rules {
246246
crate_rule(build,
247247
&mut rules,
248248
"libstd-link",
249-
"build-crate-std_shim",
249+
"build-crate-std",
250250
compile::std_link)
251251
.dep(|s| s.name("startup-objects"))
252252
.dep(|s| s.name("create-sysroot").target(s.host));
253253
crate_rule(build,
254254
&mut rules,
255255
"libtest-link",
256-
"build-crate-test_shim",
256+
"build-crate-test",
257257
compile::test_link)
258258
.dep(|s| s.name("libstd-link"));
259259
crate_rule(build,
@@ -263,13 +263,13 @@ pub fn build_rules<'a>(build: &'a Build) -> Rules {
263263
compile::rustc_link)
264264
.dep(|s| s.name("libtest-link"));
265265

266-
for (krate, path, _default) in krates("std_shim") {
266+
for (krate, path, _default) in krates("std") {
267267
rules.build(&krate.build_step, path)
268268
.dep(|s| s.name("startup-objects"))
269269
.dep(move |s| s.name("rustc").host(&build.config.build).target(s.host))
270270
.run(move |s| compile::std(build, s.target, &s.compiler()));
271271
}
272-
for (krate, path, _default) in krates("test_shim") {
272+
for (krate, path, _default) in krates("test") {
273273
rules.build(&krate.build_step, path)
274274
.dep(|s| s.name("libstd-link"))
275275
.run(move |s| compile::test(build, s.target, &s.compiler()));
@@ -384,7 +384,7 @@ pub fn build_rules<'a>(build: &'a Build) -> Rules {
384384
"pretty", "run-fail-fulldeps");
385385
}
386386

387-
for (krate, path, _default) in krates("std_shim") {
387+
for (krate, path, _default) in krates("std") {
388388
rules.test(&krate.test_step, path)
389389
.dep(|s| s.name("libtest"))
390390
.dep(|s| s.name("emulator-copy-libs"))
@@ -400,7 +400,7 @@ pub fn build_rules<'a>(build: &'a Build) -> Rules {
400400
Mode::Libstd, TestKind::Test, None));
401401

402402
// std benchmarks
403-
for (krate, path, _default) in krates("std_shim") {
403+
for (krate, path, _default) in krates("std") {
404404
rules.bench(&krate.bench_step, path)
405405
.dep(|s| s.name("libtest"))
406406
.dep(|s| s.name("emulator-copy-libs"))
@@ -415,7 +415,7 @@ pub fn build_rules<'a>(build: &'a Build) -> Rules {
415415
.run(move |s| check::krate(build, &s.compiler(), s.target,
416416
Mode::Libstd, TestKind::Bench, None));
417417

418-
for (krate, path, _default) in krates("test_shim") {
418+
for (krate, path, _default) in krates("test") {
419419
rules.test(&krate.test_step, path)
420420
.dep(|s| s.name("libtest"))
421421
.dep(|s| s.name("emulator-copy-libs"))
@@ -583,13 +583,13 @@ pub fn build_rules<'a>(build: &'a Build) -> Rules {
583583
.default(build.config.docs)
584584
.host(true)
585585
.run(move |s| doc::error_index(build, s.target));
586-
for (krate, path, default) in krates("std_shim") {
586+
for (krate, path, default) in krates("std") {
587587
rules.doc(&krate.doc_step, path)
588588
.dep(|s| s.name("libstd-link"))
589589
.default(default && build.config.docs)
590590
.run(move |s| doc::std(build, s.stage, s.target));
591591
}
592-
for (krate, path, default) in krates("test_shim") {
592+
for (krate, path, default) in krates("test") {
593593
rules.doc(&krate.doc_step, path)
594594
.dep(|s| s.name("libtest-link"))
595595
.default(default && build.config.compiler_docs)
@@ -1154,23 +1154,23 @@ mod tests {
11541154

11551155
let mut build = Build::new(flags, config);
11561156
let cwd = env::current_dir().unwrap();
1157-
build.crates.insert("std_shim".to_string(), ::Crate {
1158-
name: "std_shim".to_string(),
1157+
build.crates.insert("std".to_string(), ::Crate {
1158+
name: "std".to_string(),
11591159
deps: Vec::new(),
1160-
path: cwd.join("src/std_shim"),
1161-
doc_step: "doc-std_shim".to_string(),
1162-
build_step: "build-crate-std_shim".to_string(),
1163-
test_step: "test-std_shim".to_string(),
1164-
bench_step: "bench-std_shim".to_string(),
1160+
path: cwd.join("src/std"),
1161+
doc_step: "doc-std".to_string(),
1162+
build_step: "build-crate-std".to_string(),
1163+
test_step: "test-std".to_string(),
1164+
bench_step: "bench-std".to_string(),
11651165
});
1166-
build.crates.insert("test_shim".to_string(), ::Crate {
1167-
name: "test_shim".to_string(),
1166+
build.crates.insert("test".to_string(), ::Crate {
1167+
name: "test".to_string(),
11681168
deps: Vec::new(),
1169-
path: cwd.join("src/test_shim"),
1170-
doc_step: "doc-test_shim".to_string(),
1171-
build_step: "build-crate-test_shim".to_string(),
1172-
test_step: "test-test_shim".to_string(),
1173-
bench_step: "bench-test_shim".to_string(),
1169+
path: cwd.join("src/test"),
1170+
doc_step: "doc-test".to_string(),
1171+
build_step: "build-crate-test".to_string(),
1172+
test_step: "test-test".to_string(),
1173+
bench_step: "bench-test".to_string(),
11741174
});
11751175
build.crates.insert("rustc-main".to_string(), ::Crate {
11761176
name: "rustc-main".to_string(),
@@ -1360,7 +1360,7 @@ mod tests {
13601360
let all = rules.expand(&plan);
13611361
println!("all rules: {:#?}", all);
13621362
assert!(!all.contains(&step.name("rustc")));
1363-
assert!(!all.contains(&step.name("build-crate-std_shim").stage(1)));
1363+
assert!(!all.contains(&step.name("build-crate-std").stage(1)));
13641364

13651365
// all stage0 compiles should be for the build target, A
13661366
for step in all.iter().filter(|s| s.stage == 0) {
@@ -1425,7 +1425,7 @@ mod tests {
14251425

14261426
assert!(!plan.iter().any(|s| s.name.contains("rustc")));
14271427
assert!(plan.iter().all(|s| {
1428-
!s.name.contains("test_shim") || s.target == "C"
1428+
!s.name.contains("test") || s.target == "C"
14291429
}));
14301430
}
14311431

‎src/liballoc_jemalloc/lib.rs

-12
Original file line numberDiff line numberDiff line change
@@ -122,18 +122,6 @@ mod imp {
122122
let flags = align_to_flags(align);
123123
unsafe { nallocx(size as size_t, flags) as usize }
124124
}
125-
126-
// These symbols are used by jemalloc on android but the really old android
127-
// we're building on doesn't have them defined, so just make sure the symbols
128-
// are available.
129-
#[no_mangle]
130-
#[cfg(all(target_os = "android", not(cargobuild)))]
131-
pub extern "C" fn pthread_atfork(_prefork: *mut u8,
132-
_postfork_parent: *mut u8,
133-
_postfork_child: *mut u8)
134-
-> i32 {
135-
0
136-
}
137125
}
138126

139127
#[cfg(dummy_jemalloc)]

‎src/rustc/std_shim/Cargo.toml

-46
This file was deleted.

‎src/rustc/std_shim/lib.rs

-17
This file was deleted.

‎src/rustc/test_shim/Cargo.toml

-16
This file was deleted.

‎src/rustc/test_shim/lib.rs

-15
This file was deleted.

‎src/test/run-make/sysroot-crates-are-unstable/Makefile

+28
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,28 @@
1+
# This is a whitelist of crates which are stable, we don't check for the
2+
# instability of these crates as they're all stable!
3+
STABLE_CRATES := \
4+
std \
5+
core \
6+
proc_macro
7+
8+
# Generate a list of all crates in the sysroot. To do this we list all files in
9+
# rustc's sysroot, look at the filename, strip everything after the `-`, and
10+
# strip the leading `lib` (if present)
11+
SYSROOT := $(shell $(RUSTC) --print sysroot)
12+
LIBS := $(wildcard $(SYSROOT)/lib/rustlib/$(TARGET)/lib/*)
13+
LIBS := $(foreach lib,$(LIBS),$(notdir $(lib)))
14+
LIBS := $(foreach lib,$(LIBS),$(word 1,$(subst -, ,$(lib))))
15+
LIBS := $(foreach lib,$(LIBS),$(patsubst lib%,%,$(lib)))
16+
LIBS := $(filter-out $(STABLE_CRATES),$(LIBS))
17+
18+
all: $(foreach lib,$(LIBS),check-crate-$(lib)-is-unstable)
19+
20+
check-crate-%-is-unstable:
21+
@echo verifying $* is an unstable crate
22+
@echo 'extern crate $*;' | \
23+
$(RUSTC) - --crate-type rlib 2>&1 | cat > $(TMPDIR)/$*; \
24+
true
25+
@grep -q 'use of unstable library feature' $(TMPDIR)/$* || \
26+
(echo crate $* is not unstable && \
27+
cat $(TMPDIR)/$* && \
28+
false)

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