bjoernager/rust
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Parse "-Z instrument-xray" codegen option

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Recognize all bells and whistles that LLVM's XRay pass is capable of.
The always/never settings are a bit dumb without attributes but they're
still there. The default instruction count is chosen by the compiler,
not LLVM pass. We'll do it later.
This commit is contained in:
Oleksii Lozovskyi 2022-09-24 20:02:44 +09:00
parent ef934d9b63
commit 0e60df9ed1
5 changed files with 146 additions and 3 deletions
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26
compiler/rustc_session/src/config.rs
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@ -174,6 +174,25 @@ pub enum InstrumentCoverage {
Off,
}
/// Settings for `-Z instrument-xray` flag.
#[derive(Clone, Copy, Debug, Default, PartialEq, Eq, Hash)]
pub struct InstrumentXRay {
/// `-Z instrument-xray=always`, force instrumentation
pub always: bool,
/// `-Z instrument-xray=never`, disable instrumentation
pub never: bool,
/// `-Z instrument-xray=ignore-loops`, ignore presence of loops,
/// instrument functions based only on instruction count
pub ignore_loops: bool,
/// `-Z instrument-xray=instruction-threshold=N`, explicitly set instruction threshold
/// for instrumentation, or `None` to use compiler's default
pub instruction_threshold: Option<usize>,
/// `-Z instrument-xray=skip-entry`, do not instrument function entry
pub skip_entry: bool,
/// `-Z instrument-xray=skip-exit`, do not instrument function exit
pub skip_exit: bool,
}
#[derive(Clone, PartialEq, Hash, Debug)]
pub enum LinkerPluginLto {
LinkerPlugin(PathBuf),
@ -2805,9 +2824,9 @@ impl PpMode {
pub(crate) mod dep_tracking {
use super::{
BranchProtection, CFGuard, CFProtection, CrateType, DebugInfo, ErrorOutputType,
InstrumentCoverage, LdImpl, LinkerPluginLto, LocationDetail, LtoCli, OomStrategy, OptLevel,
OutputType, OutputTypes, Passes, SourceFileHashAlgorithm, SplitDwarfKind,
SwitchWithOptPath, SymbolManglingVersion, TraitSolver, TrimmedDefPaths,
InstrumentCoverage, InstrumentXRay, LdImpl, LinkerPluginLto, LocationDetail, LtoCli,
OomStrategy, OptLevel, OutputType, OutputTypes, Passes, SourceFileHashAlgorithm,
SplitDwarfKind, SwitchWithOptPath, SymbolManglingVersion, TraitSolver, TrimmedDefPaths,
};
use crate::lint;
use crate::options::WasiExecModel;
@ -2876,6 +2895,7 @@ pub(crate) mod dep_tracking {
CodeModel,
TlsModel,
InstrumentCoverage,
InstrumentXRay,
CrateType,
MergeFunctions,
PanicStrategy,