Rollup merge of #127523 - Oneirical:treasure-test, r=jieyouxu

Migrate `dump-ice-to-disk` and `panic-abort-eh_frame` `run-make` tests to rmake

Part of #121876 and the associated [Google Summer of Code project](https://blog.rust-lang.org/2024/05/01/gsoc-2024-selected-projects.html).

Please try:

try-job: x86_64-msvc
try-job: i686-mingw

src/tools/tidy/src/allowed_run_make_makefiles.txt

@@ -10,7 +10,6 @@ run-make/cross-lang-lto/Makefile
 run-make/dep-info-doesnt-run-much/Makefile
 run-make/dep-info-spaces/Makefile
 run-make/dep-info/Makefile
-run-make/dump-ice-to-disk/Makefile
 run-make/emit-to-stdout/Makefile
 run-make/export-executable-symbols/Makefile
 run-make/extern-flag-disambiguates/Makefile
@@ -42,7 +41,6 @@ run-make/native-link-modifier-bundle/Makefile
 run-make/native-link-modifier-whole-archive/Makefile
 run-make/no-alloc-shim/Makefile
 run-make/no-builtins-attribute/Makefile
-run-make/panic-abort-eh_frame/Makefile
 run-make/pdb-buildinfo-cl-cmd/Makefile
 run-make/pgo-gen-lto/Makefile
 run-make/pgo-indirect-call-promotion/Makefile

tests/run-make/dump-ice-to-disk/rmake.rs

@@ -0,0 +1,81 @@
+// This test checks if internal compilation error (ICE) log files work as expected.
+// - Get the number of lines from the log files without any configuration options,
+// then check that the line count doesn't change if the backtrace gets configured to be short
+// or full.
+// - Check that disabling ICE logging results in zero files created.
+// - Check that the ICE files contain some of the expected strings.
+// See https://github.com/rust-lang/rust/pull/108714
+
+use run_make_support::{cwd, has_extension, has_prefix, rfs, rustc, shallow_find_files};
+
+fn main() {
+    rustc().input("lib.rs").arg("-Ztreat-err-as-bug=1").run_fail();
+    let default = get_text_from_ice(".").lines().count();
+    clear_ice_files();
+
+    rustc().env("RUSTC_ICE", cwd()).input("lib.rs").arg("-Ztreat-err-as-bug=1").run_fail();
+    let ice_text = get_text_from_ice(cwd());
+    let default_set = ice_text.lines().count();
+    let content = ice_text;
+    let ice_files = shallow_find_files(cwd(), |path| {
+        has_prefix(path, "rustc-ice") && has_extension(path, "txt")
+    });
+    assert_eq!(ice_files.len(), 1); // There should only be 1 ICE file.
+    let ice_file_name =
+        ice_files.first().and_then(|f| f.file_name()).and_then(|n| n.to_str()).unwrap();
+    // Ensure that the ICE dump path doesn't contain `:`, because they cause problems on Windows.
+    assert!(!ice_file_name.contains(":"), "{ice_file_name}");
+
+    clear_ice_files();
+    rustc()
+        .env("RUSTC_ICE", cwd())
+        .input("lib.rs")
+        .env("RUST_BACKTRACE", "short")
+        .arg("-Ztreat-err-as-bug=1")
+        .run_fail();
+    let short = get_text_from_ice(cwd()).lines().count();
+    clear_ice_files();
+    rustc()
+        .env("RUSTC_ICE", cwd())
+        .input("lib.rs")
+        .env("RUST_BACKTRACE", "full")
+        .arg("-Ztreat-err-as-bug=1")
+        .run_fail();
+    let full = get_text_from_ice(cwd()).lines().count();
+    clear_ice_files();
+
+    // The ICE dump is explicitly disabled. Therefore, this should produce no files.
+    rustc().env("RUSTC_ICE", "0").input("lib.rs").arg("-Ztreat-err-as-bug=1").run_fail();
+    let ice_files = shallow_find_files(cwd(), |path| {
+        has_prefix(path, "rustc-ice") && has_extension(path, "txt")
+    });
+    assert!(ice_files.is_empty()); // There should be 0 ICE files.
+
+    // The line count should not change.
+    assert_eq!(short, default_set);
+    assert_eq!(short, default);
+    assert_eq!(full, default_set);
+    assert!(default > 0);
+    // Some of the expected strings in an ICE file should appear.
+    assert!(content.contains("thread 'rustc' panicked at"));
+    assert!(content.contains("stack backtrace:"));
+}
+
+fn clear_ice_files() {
+    let ice_files = shallow_find_files(cwd(), |path| {
+        has_prefix(path, "rustc-ice") && has_extension(path, "txt")
+    });
+    for file in ice_files {
+        rfs::remove_file(file);
+    }
+}
+
+#[track_caller]
+fn get_text_from_ice(dir: impl AsRef<std::path::Path>) -> String {
+    let ice_files =
+        shallow_find_files(dir, |path| has_prefix(path, "rustc-ice") && has_extension(path, "txt"));
+    assert_eq!(ice_files.len(), 1); // There should only be 1 ICE file.
+    let ice_file = ice_files.get(0).unwrap();
+    let output = rfs::read_to_string(ice_file);
+    output
+}

tests/run-make/panic-abort-eh_frame/rmake.rs

@@ -0,0 +1,24 @@
+// An `.eh_frame` section in an object file is a symptom of an UnwindAction::Terminate
+// being inserted, useful for determining whether or not unwinding is necessary.
+// This is useless when panics would NEVER unwind due to -C panic=abort. This section should
+// therefore never appear in the emit file of a -C panic=abort compilation, and this test
+// checks that this is respected.
+// See https://github.com/rust-lang/rust/pull/112403
+
+//@ only-linux
+// FIXME(Oneirical): the DW_CFA symbol appears on Windows-gnu, because uwtable
+// is forced to true on Windows targets (see #128136).
+
+use run_make_support::{llvm_objdump, rustc};
+
+fn main() {
+    rustc()
+        .input("foo.rs")
+        .crate_type("lib")
+        .emit("obj=foo.o")
+        .panic("abort")
+        .edition("2021")
+        .arg("-Zvalidate-mir")
+        .run();
+    llvm_objdump().arg("--dwarf=frames").input("foo.o").run().assert_stdout_not_contains("DW_CFA");
+}