bjoernager/rust
bjoernager/rust
1
Fork 0
Code Issues Pull requests Activity

Set path of the compile unit to the source directory

Browse source 
As part of the effort to implement split dwarf debug info, we ended up
setting the compile unit location to the output directory rather than
the source directory. Furthermore, it seems like we failed to remap the
prefixes for this as well!

The desired behaviour is to instead set the `DW_AT_GNU_dwo_name` to a
path relative to compiler's working directory. This still allows
debuggers to find the split dwarf files, while not changing the
behaviour of the code that is compiling with regular debug info, and not
changing the compiler's behaviour with regards to reproducibility.

Fixes #82074
This commit is contained in:
Simonas Kazlauskas 2021-02-14 17:12:14 +02:00
parent 3158857297
commit 16c71886c9
4 changed files with 13 additions and 21 deletions
Download patch file Download diff file Expand all files Collapse all files

2
compiler/rustc_codegen_llvm/src/back/write.rs
View file

@ -93,7 +93,7 @@ pub fn create_informational_target_machine(sess: &Session) -> &'static mut llvm:
pub fn create_target_machine(tcx: TyCtxt<'_>, mod_name: &str) -> &'static mut llvm::TargetMachine {
let split_dwarf_file = if tcx.sess.target_can_use_split_dwarf() {
tcx.output_filenames(LOCAL_CRATE)
.split_dwarf_filename(tcx.sess.split_debuginfo(), Some(mod_name))
.split_dwarf_path(tcx.sess.split_debuginfo(), Some(mod_name))
} else {
None
};