e4c3fc5cf2
I don't think this has happened in awhile but I've run a `cargo update` as well as trimming some of the duplicate/older dependencies in `Cargo.lock` by updating some of our immediate dependencies as well.
112 lines
3.3 KiB
Rust
112 lines
3.3 KiB
Rust
//! Helper utils for tracking and patching intra unit or section references.
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use gimli::write;
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use gimli::{DebugInfoOffset, Reader, UnitHeader, UnitOffset};
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use std::collections::HashMap;
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/// Stores compiled unit references: UnitEntryId+DwAt denotes a patch location
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/// and UnitOffset is a location in original DWARF.
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pub struct PendingUnitRefs {
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refs: Vec<(write::UnitEntryId, gimli::DwAt, UnitOffset)>,
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}
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impl PendingUnitRefs {
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pub fn new() -> Self {
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Self { refs: Vec::new() }
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}
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pub fn insert(&mut self, entry_id: write::UnitEntryId, attr: gimli::DwAt, offset: UnitOffset) {
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self.refs.push((entry_id, attr, offset));
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}
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}
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/// Stores .debug_info references: UnitEntryId+DwAt denotes a patch location
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/// and DebugInfoOffset is a location in original DWARF.
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pub struct PendingDebugInfoRefs {
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refs: Vec<(write::UnitEntryId, gimli::DwAt, DebugInfoOffset)>,
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}
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impl PendingDebugInfoRefs {
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pub fn new() -> Self {
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Self { refs: Vec::new() }
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}
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pub fn insert(
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&mut self,
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entry_id: write::UnitEntryId,
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attr: gimli::DwAt,
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offset: DebugInfoOffset,
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) {
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self.refs.push((entry_id, attr, offset));
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}
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}
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/// Stores map between read and written references of DWARF entries of
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/// a compiled unit.
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pub struct UnitRefsMap {
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map: HashMap<UnitOffset, write::UnitEntryId>,
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}
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impl UnitRefsMap {
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pub fn new() -> Self {
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Self {
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map: HashMap::new(),
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}
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}
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pub fn insert(&mut self, offset: UnitOffset, entry_id: write::UnitEntryId) {
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self.map.insert(offset, entry_id);
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}
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pub fn patch(&self, refs: PendingUnitRefs, comp_unit: &mut write::Unit) {
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for (die_id, attr_name, offset) in refs.refs {
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let die = comp_unit.get_mut(die_id);
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if let Some(unit_id) = self.map.get(&offset) {
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die.set(attr_name, write::AttributeValue::UnitRef(*unit_id));
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}
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}
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}
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}
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/// Stores map between read and written references of DWARF entries of
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/// the entire .debug_info.
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pub struct DebugInfoRefsMap {
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map: HashMap<DebugInfoOffset, (write::UnitId, write::UnitEntryId)>,
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}
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impl DebugInfoRefsMap {
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pub fn new() -> Self {
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Self {
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map: HashMap::new(),
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}
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}
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pub fn insert<R>(&mut self, unit: &UnitHeader<R>, unit_id: write::UnitId, unit_map: UnitRefsMap)
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where
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R: Reader<Offset = usize>,
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{
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self.map
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.extend(unit_map.map.into_iter().map(|(off, entry_id)| {
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let off = off
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.to_debug_info_offset(unit)
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.expect("should be in debug_info section");
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(off, (unit_id, entry_id))
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}));
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}
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pub fn patch(
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&self,
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refs: impl Iterator<Item = (write::UnitId, PendingDebugInfoRefs)>,
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units: &mut write::UnitTable,
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) {
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for (id, refs) in refs {
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let unit = units.get_mut(id);
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for (die_id, attr_name, offset) in refs.refs {
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let die = unit.get_mut(die_id);
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if let Some((id, entry_id)) = self.map.get(&offset) {
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die.set(
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attr_name,
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write::AttributeValue::DebugInfoRef(write::Reference::Entry(
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*id, *entry_id,
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)),
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);
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}
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}
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}
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}
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}
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