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Add EndianReader<T> #298

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merged 3 commits into from
May 16, 2018
Merged

Add EndianReader<T> #298

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694f177
Add EndianReader<T>
fitzgen Apr 29, 2018
b850eb8
Add a self-parse of `.debug_info` test using `EndianRcSlice`
fitzgen May 15, 2018
6f5e049
Add a parse-self benchmark for `.debug_info` and `EndianRcSlice
fitzgen May 15, 2018
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50 changes: 34 additions & 16 deletions benches/bench.rs
100644 → 100755
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Original file line number Diff line number Diff line change
Expand Up @@ -11,6 +11,7 @@ use std::env;
use std::fs::File;
use std::io::Read;
use std::path::PathBuf;
use std::rc::Rc;

pub fn read_section(section: &str) -> Vec<u8> {
let mut path = PathBuf::from(env::var("CARGO_MANIFEST_DIR").unwrap_or_else(|_| ".".into()));
Expand Down Expand Up @@ -46,30 +47,47 @@ fn bench_parsing_debug_abbrev(b: &mut test::Bencher) {
});
}

#[inline]
fn impl_bench_parsing_debug_info<R: Reader>(debug_info: DebugInfo<R>, debug_abbrev: DebugAbbrev<R>) {
let mut iter = debug_info.units();
while let Some(unit) = iter.next().expect("Should parse compilation unit") {
let abbrevs = unit.abbreviations(&debug_abbrev)
.expect("Should parse abbreviations");

let mut cursor = unit.entries(&abbrevs);
while let Some((_, entry)) = cursor.next_dfs().expect("Should parse next dfs") {
let mut attrs = entry.attrs();
while let Some(attr) = attrs.next().expect("Should parse entry's attribute") {
test::black_box(&attr);
}
}
}
}

#[bench]
fn bench_parsing_debug_info(b: &mut test::Bencher) {
let debug_info = read_section("debug_info");
let debug_info = DebugInfo::new(&debug_info, LittleEndian);

let debug_abbrev = read_section("debug_abbrev");
let debug_abbrev = DebugAbbrev::new(&debug_abbrev, LittleEndian);

let debug_info = read_section("debug_info");
b.iter(|| impl_bench_parsing_debug_info(debug_info, debug_abbrev));
}

b.iter(|| {
let debug_info = DebugInfo::new(&debug_info, LittleEndian);
#[bench]
fn bench_parsing_debug_info_with_endian_rc_slice(b: &mut test::Bencher) {
let debug_info = read_section("debug_info");
let debug_info = Rc::from(&debug_info[..]);
let debug_info = gimli::EndianRcSlice::new(debug_info, LittleEndian);
let debug_info = DebugInfo::from(debug_info);

let mut iter = debug_info.units();
while let Some(unit) = iter.next().expect("Should parse compilation unit") {
let abbrevs = unit.abbreviations(&debug_abbrev)
.expect("Should parse abbreviations");
let debug_abbrev = read_section("debug_abbrev");
let debug_abbrev = Rc::from(&debug_abbrev[..]);
let debug_abbrev = gimli::EndianRcSlice::new(debug_abbrev, LittleEndian);
let debug_abbrev = DebugAbbrev::from(debug_abbrev);

let mut cursor = unit.entries(&abbrevs);
while let Some((_, entry)) = cursor.next_dfs().expect("Should parse next dfs") {
let mut attrs = entry.attrs();
while let Some(attr) = attrs.next().expect("Should parse entry's attribute") {
test::black_box(&attr);
}
}
}
});
b.iter(|| impl_bench_parsing_debug_info(debug_info.clone(), debug_abbrev.clone()));
}

#[bench]
Expand Down
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