bjoernager/rust
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Preserve, clarify, and extend debug information

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`-Cdebuginfo=1` was never line tables only and
can't be due to backwards compatibility issues.
This was clarified and an option for line tables only
was added. Additionally an option for line info
directives only was added, which is well needed for
some targets. The debug info options should now
behave the same as clang's debug info options.
This commit is contained in:
Julia Tatz 2021-04-06 16:00:35 -04:00 • committed by Jynn Nelson
parent eb3e9c1f45
commit 0504a33383
13 changed files with 126 additions and 54 deletions
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29
compiler/rustc_session/src/config.rs
View file

@ -260,6 +260,8 @@ pub enum SymbolManglingVersion {
#[derive(Clone, Copy, Debug, PartialEq, Hash)]
pub enum DebugInfo {
None,
LineDirectivesOnly,
LineTablesOnly,
Limited,
Full,
}
@ -1979,11 +1981,7 @@ fn parse_opt_level(
}
}
fn select_debuginfo(
matches: &getopts::Matches,
cg: &CodegenOptions,
error_format: ErrorOutputType,
) -> DebugInfo {
fn select_debuginfo(matches: &getopts::Matches, cg: &CodegenOptions) -> DebugInfo {
let max_g = matches.opt_positions("g").into_iter().max();
let max_c = matches
.opt_strs_pos("C")
@ -1993,24 +1991,7 @@ fn select_debuginfo(
if let Some("debuginfo") = s.split('=').next() { Some(i) } else { None }
})
.max();
if max_g > max_c {
DebugInfo::Full
} else {
match cg.debuginfo {
0 => DebugInfo::None,
1 => DebugInfo::Limited,
2 => DebugInfo::Full,
arg => {
early_error(
error_format,
&format!(
"debug info level needs to be between \
0-2 (instead was `{arg}`)"
),
);
}
}
}
if max_g > max_c { DebugInfo::Full } else { cg.debuginfo }
}
pub(crate) fn parse_assert_incr_state(
@ -2498,7 +2479,7 @@ pub fn build_session_options(matches: &getopts::Matches) -> Options {
// to use them interchangeably. See the note above (regarding `-O` and `-C opt-level`)
// for more details.
let debug_assertions = cg.debug_assertions.unwrap_or(opt_level == OptLevel::No);
let debuginfo = select_debuginfo(matches, &cg, error_format);
let debuginfo = select_debuginfo(matches, &cg);
let mut search_paths = vec![];
for s in &matches.opt_strs("L") {