rewrite incremental-session-fail to rmake

Author: Oneirical

src/tools/run-make-support/src/lib.rs

@@ -274,23 +274,29 @@ pub fn set_host_rpath(cmd: &mut Command) {
 /// Read the contents of a file that cannot simply be read by
 /// read_to_string, due to invalid utf8 data, then assert that it contains `expected`.
 #[track_caller]
-pub fn invalid_utf8_contains_str<P: AsRef<Path>>(path: P, expected: &str) {
-    use std::io::Read;
-    let mut file = std::fs::File::open(path).unwrap();
-    let mut buffer = Vec::new();
-    file.read_to_end(&mut buffer).unwrap();
-    assert!(String::from_utf8_lossy(&buffer).contains(expected));
+pub fn invalid_utf8_contains<P: AsRef<Path>>(path: P, expected: &str) {
+    let buffer = fs_wrapper::read(path.as_ref());
+    if !String::from_utf8_lossy(&buffer).contains(expected) {
+        eprintln!("=== FILE CONTENTS (LOSSY) ===");
+        eprintln!("{}", String::from_utf8_lossy(&buffer));
+        eprintln!("=== SPECIFIED TEXT ===");
+        eprintln!("{}", expected);
+        panic!("specified text was not found in file");
+    }
 }
 
 /// Read the contents of a file that cannot simply be read by
 /// read_to_string, due to invalid utf8 data, then assert that it does not contain `expected`.
 #[track_caller]
-pub fn invalid_utf8_not_contains_str<P: AsRef<Path>>(path: P, expected: &str) {
-    use std::io::Read;
-    let mut file = std::fs::File::open(path).unwrap();
-    let mut buffer = Vec::new();
-    file.read_to_end(&mut buffer).unwrap();
-    assert!(!String::from_utf8_lossy(&buffer).contains(expected));
+pub fn invalid_utf8_not_contains<P: AsRef<Path>>(path: P, expected: &str) {
+    let buffer = fs_wrapper::read(path.as_ref());
+    if String::from_utf8_lossy(&buffer).contains(expected) {
+        eprintln!("=== FILE CONTENTS (LOSSY) ===");
+        eprintln!("{}", String::from_utf8_lossy(&buffer));
+        eprintln!("=== SPECIFIED TEXT ===");
+        eprintln!("{}", expected);
+        panic!("specified text was unexpectedly found in file");
+    }
 }
 
 /// Copy a directory into another.

src/tools/tidy/src/allowed_run_make_makefiles.txt

@@ -67,7 +67,6 @@ run-make/inaccessible-temp-dir/Makefile
 run-make/include_bytes_deps/Makefile
 run-make/incr-add-rust-src-component/Makefile
 run-make/incr-foreign-head-span/Makefile
-run-make/incremental-session-fail/Makefile
 run-make/inline-always-many-cgu/Makefile
 run-make/interdependent-c-libraries/Makefile
 run-make/intrinsic-unreachable/Makefile

tests/run-make/extern-flag-fun/rmake.rs

@@ -5,21 +5,23 @@
 // as non-private. This test checks that these rules are enforced.
 // See https://github.com/rust-lang/rust/pull/15319
 
-//@ ignore-cross-compile
-
 use run_make_support::{rust_lib_name, rustc};
 
 fn main() {
     rustc().input("bar.rs").crate_type("rlib").run();
+    // Exactly the same rlib as the first line, only the filename changes.
     rustc().input("bar.rs").crate_type("rlib").extra_filename("-a").run();
     rustc().input("bar-alt.rs").crate_type("rlib").run();
+    // The crate must be valid.
     rustc().input("foo.rs").extern_("bar", "no-exist").run_fail();
     rustc().input("foo.rs").extern_("bar", "foo.rs").run_fail();
+    // Compilation fails with two different rlibs.
     rustc()
         .input("foo.rs")
         .extern_("bar", rust_lib_name("bar"))
         .extern_("bar", rust_lib_name("bar-alt"))
         .run_fail();
+    // Even though this one has seemingly two rlibs, they are one and the same.
     rustc()
         .input("foo.rs")
         .extern_("bar", rust_lib_name("bar"))

tests/run-make/incremental-debugger-visualizer/rmake.rs

@@ -1,20 +1,15 @@
-// This test makes sure that changes to files referenced via //[debugger_visualizer]
-// are picked up when compiling incrementally.
+// This test ensures that changes to files referenced via #[debugger_visualizer]
+// (in this case, foo.py and foo.natvis) are picked up when compiling incrementally.
+// See https://github.com/rust-lang/rust/pull/111641
 
-// We have to copy the source to $(TMPDIR) because Github CI mounts the source
-// directory as readonly. We need to apply modifications to some of the source
-// file.
-
-use run_make_support::{
-    fs_wrapper, invalid_utf8_contains_str, invalid_utf8_not_contains_str, rustc,
-};
+use run_make_support::{fs_wrapper, invalid_utf8_contains, invalid_utf8_not_contains, rustc};
 use std::io::Read;
 
 fn main() {
     fs_wrapper::create_file("foo.py");
     fs_wrapper::write("foo.py", "GDB script v1");
     fs_wrapper::create_file("foo.natvis");
-    fs_wrapper::write("foo.py", "Natvis v1");
+    fs_wrapper::write("foo.natvis", "Natvis v1");
     rustc()
         .input("foo.rs")
         .crate_type("rlib")
@@ -23,8 +18,8 @@ fn main() {
         .arg("-Zincremental-verify-ich")
         .run();
 
-    invalid_utf8_contains_str("libfoo.rmeta", "GDB script v1");
-    invalid_utf8_contains_str("libfoo.rmeta", "Natvis v1");
+    invalid_utf8_contains("libfoo.rmeta", "GDB script v1");
+    invalid_utf8_contains("libfoo.rmeta", "Natvis v1");
 
     // Change only the GDB script and check that the change has been picked up
     fs_wrapper::remove_file("foo.py");
@@ -38,14 +33,14 @@ fn main() {
         .arg("-Zincremental-verify-ich")
         .run();
 
-    invalid_utf8_contains_str("libfoo.rmeta", "GDB script v2");
-    invalid_utf8_not_contains_str("libfoo.rmeta", "GDB script v1");
-    invalid_utf8_contains_str("libfoo.rmeta", "Natvis v1");
+    invalid_utf8_contains("libfoo.rmeta", "GDB script v2");
+    invalid_utf8_not_contains("libfoo.rmeta", "GDB script v1");
+    invalid_utf8_contains("libfoo.rmeta", "Natvis v1");
 
     // Now change the Natvis version and check that the change has been picked up
     fs_wrapper::remove_file("foo.natvis");
     fs_wrapper::create_file("foo.natvis");
-    fs_wrapper::write("foo.py", "Natvis v2");
+    fs_wrapper::write("foo.natvis", "Natvis v2");
     rustc()
         .input("foo.rs")
         .crate_type("rlib")
@@ -54,8 +49,8 @@ fn main() {
         .arg("-Zincremental-verify-ich")
         .run();
 
-    invalid_utf8_contains_str("libfoo.rmeta", "GDB script v2");
-    invalid_utf8_not_contains_str("libfoo.rmeta", "GDB script v1");
-    invalid_utf8_not_contains_str("libfoo.rmeta", "Natvis v1");
-    invalid_utf8_contains_str("libfoo.rmeta", "Natvis v2");
+    invalid_utf8_contains("libfoo.rmeta", "GDB script v2");
+    invalid_utf8_not_contains("libfoo.rmeta", "GDB script v1");
+    invalid_utf8_not_contains("libfoo.rmeta", "Natvis v1");
+    invalid_utf8_contains("libfoo.rmeta", "Natvis v2");
 }

tests/run-make/incremental-session-fail/Makefile

@@ -0,0 +1,15 @@
+// Failing to create the directory where output incremental
+// files would be stored used to cause an ICE (Internal Compiler
+// Error). This was patched in #85698, and this test checks that
+// the ensuing compilation failure is not an ICE.
+// See https://github.com/rust-lang/rust/pull/85698
+
+use run_make_support::{fs_wrapper, rustc};
+
+fn main() {
+    fs_wrapper::create_file("session");
+    // rustc should fail to create the session directory here.
+    let out = rustc().input("foo.rs").crate_type("rlib").incremental("session").run_fail();
+    out.assert_stderr_contains("could not create incremental compilation crate directory");
+    out.assert_stderr_not_contains("internal compiler error");
+}