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| 1 | +// Check that the compiler toolchain (rustc) that we distribute is not using newer glibc |
| 2 | +// symbols than a specified minimum. |
| 3 | +// This test should only be executed on an extracted dist archive or in a dist-* CI job. |
| 4 | + |
| 5 | +//@ only-dist |
| 6 | +//@ only-x86_64-unknown-linux-gnu |
| 7 | +//@ ignore-cross-compile |
| 8 | + |
| 9 | +use std::path::{Path, PathBuf}; |
| 10 | + |
| 11 | +use run_make_support::{cmd, llvm_objdump, regex, rustc_path}; |
| 12 | + |
| 13 | +fn main() { |
| 14 | + // This is the maximum glibc version *supported* by the x86_64-unknown-linux-gnu target. |
| 15 | + // All glibc symbols used in the compiler must be lower or equal than this version. |
| 16 | + let max_supported = (2, 17, 99); |
| 17 | + |
| 18 | + let rustc = PathBuf::from(rustc_path()); |
| 19 | + // Check symbols directly in rustc |
| 20 | + check_symbols(&rustc, max_supported); |
| 21 | + |
| 22 | + // Find dynamic libraries referenced by rustc that come from our lib directory |
| 23 | + let lib_path = rustc.parent().unwrap().parent().unwrap().join("lib"); |
| 24 | + let dynamic_libs = find_dynamic_libs(&rustc) |
| 25 | + .into_iter() |
| 26 | + .filter_map(|path| path.canonicalize().ok()) |
| 27 | + .filter(|lib| lib.starts_with(&lib_path)) |
| 28 | + .collect::<Vec<_>>(); |
| 29 | + for lib in dynamic_libs { |
| 30 | + check_symbols(&lib, max_supported); |
| 31 | + } |
| 32 | +} |
| 33 | + |
| 34 | +#[derive(Debug, Ord, PartialOrd, Eq, PartialEq)] |
| 35 | +struct GlibcSymbol { |
| 36 | + name: String, |
| 37 | + version: (u32, u32, u32), |
| 38 | +} |
| 39 | + |
| 40 | +fn find_dynamic_libs(path: &Path) -> Vec<PathBuf> { |
| 41 | + cmd("ldd") |
| 42 | + .arg(path) |
| 43 | + .run() |
| 44 | + .stdout_utf8() |
| 45 | + .lines() |
| 46 | + .filter_map(|line| { |
| 47 | + let line = line.trim(); |
| 48 | + let Some((_, line)) = line.split_once(" => ") else { |
| 49 | + return None; |
| 50 | + }; |
| 51 | + line.split_ascii_whitespace().next().map(|path| PathBuf::from(path)) |
| 52 | + }) |
| 53 | + .collect() |
| 54 | +} |
| 55 | + |
| 56 | +fn check_symbols(file: &Path, max_supported: (u32, u32, u32)) { |
| 57 | + println!("Checking {}", file.display()); |
| 58 | + let mut invalid: Vec<GlibcSymbol> = get_glibc_symbols(file) |
| 59 | + .into_iter() |
| 60 | + .filter(|symbol| symbol.version > max_supported) |
| 61 | + .collect(); |
| 62 | + if !invalid.is_empty() { |
| 63 | + invalid.sort(); |
| 64 | + panic!( |
| 65 | + "Found invalid glibc symbols in {}:\n{}", |
| 66 | + file.display(), |
| 67 | + invalid |
| 68 | + .into_iter() |
| 69 | + .map(|symbol| format!( |
| 70 | + "{} ({:?} higher than max allowed {:?})", |
| 71 | + symbol.name, symbol.version, max_supported |
| 72 | + )) |
| 73 | + .collect::<Vec<_>>() |
| 74 | + .join("\n") |
| 75 | + ) |
| 76 | + } |
| 77 | +} |
| 78 | + |
| 79 | +fn get_glibc_symbols(file: &Path) -> Vec<GlibcSymbol> { |
| 80 | + let regex = regex::Regex::new(r#"GLIBC_(\d)+\.(\d+)(:?\.(\d+))?"#).unwrap(); |
| 81 | + |
| 82 | + // FIXME(kobzol): llvm-objdump currently chokes on the BOLTed librustc_driver.so file. |
| 83 | + // Use objdump instead, since it seems to work, and we only run this test in a specific |
| 84 | + // CI environment anyway. |
| 85 | + cmd("objdump") |
| 86 | + .arg("--dynamic-syms") |
| 87 | + .arg(file) |
| 88 | + .run() |
| 89 | + .stdout_utf8() |
| 90 | + .lines() |
| 91 | + .filter_map(|line| { |
| 92 | + // Example line |
| 93 | + // 0000000000000000 DF *UND* 0000000000000000 (GLIBC_2.2.5) sbrk |
| 94 | + let mut parts = line.split(" ").collect::<Vec<_>>().into_iter().rev(); |
| 95 | + let Some(name) = parts.next() else { |
| 96 | + return None; |
| 97 | + }; |
| 98 | + let Some(lib) = parts.next() else { |
| 99 | + return None; |
| 100 | + }; |
| 101 | + let Some(version) = regex.captures(lib) else { |
| 102 | + return None; |
| 103 | + }; |
| 104 | + let major = version.get(1).and_then(|m| m.as_str().parse().ok()).unwrap_or(0); |
| 105 | + let minor = version.get(2).and_then(|m| m.as_str().parse().ok()).unwrap_or(0); |
| 106 | + let patch = version.get(3).and_then(|m| m.as_str().parse().ok()).unwrap_or(0); |
| 107 | + Some(GlibcSymbol { version: (major, minor, patch), name: name.to_string() }) |
| 108 | + }) |
| 109 | + .collect() |
| 110 | +} |
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