benches/helpers/miri_helper.rs

   1 extern crate getopts;
   2 extern crate miri;
   3 extern crate rustc;
   4 extern crate rustc_driver;
   5 extern crate rustc_interface;
   6 extern crate test;
   7
   8 use self::miri::eval_main;
   9 use crate::test::Bencher;
  10 use rustc::hir::def_id::LOCAL_CRATE;
  11 use rustc_driver::Compilation;
  12 use rustc_interface::{interface, Queries};
  13
  14 struct MiriCompilerCalls<'a> {
  15     bencher: &'a mut Bencher,
  16 }
  17
  18 impl rustc_driver::Callbacks for MiriCompilerCalls<'_> {
  19     fn after_analysis<'tcx>(
  20         &mut self,
  21         compiler: &interface::Compiler,
  22         queries: &'tcx Queries<'tcx>,
  23     ) -> Compilation {
  24         compiler.session().abort_if_errors();
  25
  26         queries.global_ctxt().unwrap().peek_mut().enter(|tcx| {
  27             let (entry_def_id, _) =
  28                 tcx.entry_fn(LOCAL_CRATE).expect("no main or start function found");
  29
  30             self.bencher.iter(|| {
  31                 let config = miri::MiriConfig {
  32                     validate: true,
  33                     communicate: false,
  34                     ignore_leaks: false,
  35                     excluded_env_vars: vec![],
  36                     args: vec![],
  37                     seed: None,
  38                     tracked_pointer_tag: None,
  39                 };
  40                 eval_main(tcx, entry_def_id, config);
  41             });
  42         });
  43
  44         compiler.session().abort_if_errors();
  45
  46         Compilation::Stop
  47     }
  48 }
  49
  50 fn find_sysroot() -> String {
  51     // Taken from https://github.com/Manishearth/rust-clippy/pull/911.
  52     let home = option_env!("RUSTUP_HOME").or(option_env!("MULTIRUST_HOME"));
  53     let toolchain = option_env!("RUSTUP_TOOLCHAIN").or(option_env!("MULTIRUST_TOOLCHAIN"));
  54     match (home, toolchain) {
  55         (Some(home), Some(toolchain)) => format!("{}/toolchains/{}", home, toolchain),
  56         _ => option_env!("RUST_SYSROOT")
  57             .expect("need to specify RUST_SYSROOT env var or use rustup or multirust")
  58             .to_owned(),
  59     }
  60 }
  61
  62 pub fn run(filename: &str, bencher: &mut Bencher) {
  63     let args = &[
  64         "miri".to_string(),
  65         format!("benches/helpers/{}.rs", filename),
  66         "--sysroot".to_string(),
  67         find_sysroot(),
  68     ];
  69     rustc_driver::run_compiler(args, &mut MiriCompilerCalls { bencher }, None, None).unwrap()
  70 }