137 lines
5 KiB
Rust
137 lines
5 KiB
Rust
// This test checks if internal compilation error (ICE) log files work as expected.
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// - Get the number of lines from the log files without any configuration options,
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// then check that the line count doesn't change if the backtrace gets configured to be short
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// or full.
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// - Check that disabling ICE logging results in zero files created.
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// - Check that the ICE files contain some of the expected strings.
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// - exercise the -Zmetrics-dir nightly flag
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// - verify what happens when both the nightly flag and env variable are set
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// - test the RUST_BACKTRACE=0 behavior against the file creation
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// See https://github.com/rust-lang/rust/pull/108714
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use run_make_support::{cwd, has_extension, has_prefix, rfs, rustc, shallow_find_files};
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fn main() {
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rustc().input("lib.rs").arg("-Ztreat-err-as-bug=1").run_fail();
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let default = get_text_from_ice(".").lines().count();
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clear_ice_files();
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rustc().env("RUSTC_ICE", cwd()).input("lib.rs").arg("-Ztreat-err-as-bug=1").run_fail();
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let ice_text = get_text_from_ice(cwd());
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let default_set = ice_text.lines().count();
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let content = ice_text;
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let ice_files = shallow_find_files(cwd(), |path| {
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has_prefix(path, "rustc-ice") && has_extension(path, "txt")
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});
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assert_eq!(ice_files.len(), 1); // There should only be 1 ICE file.
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let ice_file_name =
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ice_files.first().and_then(|f| f.file_name()).and_then(|n| n.to_str()).unwrap();
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// Ensure that the ICE dump path doesn't contain `:`, because they cause problems on Windows.
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assert!(!ice_file_name.contains(":"), "{ice_file_name}");
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assert_eq!(default, default_set);
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assert!(default > 0);
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// Some of the expected strings in an ICE file should appear.
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assert!(content.contains("thread 'rustc' panicked at"));
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assert!(content.contains("stack backtrace:"));
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test_backtrace_short(default);
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test_backtrace_full(default);
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test_backtrace_disabled(default);
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clear_ice_files();
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// The ICE dump is explicitly disabled. Therefore, this should produce no files.
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rustc().env("RUSTC_ICE", "0").input("lib.rs").arg("-Ztreat-err-as-bug=1").run_fail();
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let ice_files = shallow_find_files(cwd(), |path| {
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has_prefix(path, "rustc-ice") && has_extension(path, "txt")
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});
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assert!(ice_files.is_empty()); // There should be 0 ICE files.
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metrics_dir(default);
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}
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fn test_backtrace_short(baseline: usize) {
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clear_ice_files();
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rustc()
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.env("RUSTC_ICE", cwd())
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.input("lib.rs")
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.env("RUST_BACKTRACE", "short")
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.arg("-Ztreat-err-as-bug=1")
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.run_fail();
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let short = get_text_from_ice(cwd()).lines().count();
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// backtrace length in dump shouldn't be changed by RUST_BACKTRACE
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assert_eq!(short, baseline);
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}
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fn test_backtrace_full(baseline: usize) {
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clear_ice_files();
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rustc()
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.env("RUSTC_ICE", cwd())
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.input("lib.rs")
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.env("RUST_BACKTRACE", "full")
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.arg("-Ztreat-err-as-bug=1")
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.run_fail();
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let full = get_text_from_ice(cwd()).lines().count();
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// backtrace length in dump shouldn't be changed by RUST_BACKTRACE
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assert_eq!(full, baseline);
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}
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fn test_backtrace_disabled(baseline: usize) {
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clear_ice_files();
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rustc()
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.env("RUSTC_ICE", cwd())
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.input("lib.rs")
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.env("RUST_BACKTRACE", "0")
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.arg("-Ztreat-err-as-bug=1")
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.run_fail();
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let disabled = get_text_from_ice(cwd()).lines().count();
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// backtrace length in dump shouldn't be changed by RUST_BACKTRACE
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assert_eq!(disabled, baseline);
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}
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fn metrics_dir(baseline: usize) {
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test_flag_only(baseline);
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test_flag_and_env(baseline);
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}
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fn test_flag_only(baseline: usize) {
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clear_ice_files();
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let metrics_arg = format!("-Zmetrics-dir={}", cwd().display());
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rustc().input("lib.rs").arg("-Ztreat-err-as-bug=1").arg(metrics_arg).run_fail();
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let output = get_text_from_ice(cwd()).lines().count();
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assert_eq!(output, baseline);
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}
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fn test_flag_and_env(baseline: usize) {
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clear_ice_files();
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let metrics_arg = format!("-Zmetrics-dir={}", cwd().display());
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let real_dir = cwd().join("actually_put_ice_here");
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rfs::create_dir(real_dir.clone());
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rustc()
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.input("lib.rs")
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.env("RUSTC_ICE", real_dir.clone())
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.arg("-Ztreat-err-as-bug=1")
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.arg(metrics_arg)
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.run_fail();
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let output = get_text_from_ice(real_dir).lines().count();
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assert_eq!(output, baseline);
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}
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fn clear_ice_files() {
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let ice_files = shallow_find_files(cwd(), |path| {
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has_prefix(path, "rustc-ice") && has_extension(path, "txt")
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});
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for file in ice_files {
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rfs::remove_file(file);
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}
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}
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#[track_caller]
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fn get_text_from_ice(dir: impl AsRef<std::path::Path>) -> String {
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let ice_files =
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shallow_find_files(dir, |path| has_prefix(path, "rustc-ice") && has_extension(path, "txt"));
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assert_eq!(ice_files.len(), 1); // There should only be 1 ICE file.
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let ice_file = ice_files.get(0).unwrap();
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let output = rfs::read_to_string(ice_file);
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output
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}
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