diff options
Diffstat (limited to 'compiler/rustc_session/src/session.rs')
| -rw-r--r-- | compiler/rustc_session/src/session.rs | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/compiler/rustc_session/src/session.rs b/compiler/rustc_session/src/session.rs index fb4a437a487..1359f7eb7bb 100644 --- a/compiler/rustc_session/src/session.rs +++ b/compiler/rustc_session/src/session.rs @@ -6,6 +6,8 @@ use std::sync::Arc; use std::sync::atomic::AtomicBool; use std::{env, fmt, io}; +use rand::{RngCore, rng}; +use rustc_data_structures::base_n::{CASE_INSENSITIVE, ToBaseN}; use rustc_data_structures::flock; use rustc_data_structures::fx::{FxHashMap, FxIndexSet}; use rustc_data_structures::profiling::{SelfProfiler, SelfProfilerRef}; @@ -203,6 +205,14 @@ pub struct Session { target_filesearch: FileSearch, host_filesearch: FileSearch, + + /// A random string generated per invocation of rustc. + /// + /// This is prepended to all temporary files so that they do not collide + /// during concurrent invocations of rustc, or past invocations that were + /// preserved with a flag like `-C save-temps`, since these files may be + /// hard linked. + pub invocation_temp: Option<String>, } #[derive(PartialEq, Eq, PartialOrd, Ord)] @@ -1117,6 +1127,12 @@ pub fn build_session( let target_filesearch = filesearch::FileSearch::new(&sopts.search_paths, &target_tlib_path, &target); let host_filesearch = filesearch::FileSearch::new(&sopts.search_paths, &host_tlib_path, &host); + + let invocation_temp = sopts + .incremental + .as_ref() + .map(|_| rng().next_u32().to_base_fixed_len(CASE_INSENSITIVE).to_string()); + let sess = Session { target, host, @@ -1140,6 +1156,7 @@ pub fn build_session( expanded_args, target_filesearch, host_filesearch, + invocation_temp, }; validate_commandline_args_with_session_available(&sess); |