use crate::prelude::*;
-use rustc_index::vec::IndexVec;
-
-use cranelift_codegen::entity::EntityRef;
-use cranelift_codegen::ir::{Endianness, LabelValueLoc, ValueLabel};
+use cranelift_codegen::ir::Endianness;
use cranelift_codegen::isa::TargetIsa;
-use cranelift_codegen::ValueLocRange;
-use gimli::write::{
- Address, AttributeValue, DwarfUnit, Expression, LineProgram, LineString, Location,
- LocationList, Range, RangeList, UnitEntryId,
-};
-use gimli::{Encoding, Format, LineEncoding, RunTimeEndian, X86_64};
+use gimli::write::{Address, AttributeValue, DwarfUnit, LineProgram, LineString, Range, RangeList};
+use gimli::{Encoding, Format, LineEncoding, RunTimeEndian};
pub(crate) use emit::{DebugReloc, DebugRelocName};
pub(crate) use unwind::UnwindContext;
dwarf: DwarfUnit,
unit_range_list: RangeList,
-
- types: FxHashMap<Ty<'tcx>, UnitEntryId>,
}
impl<'tcx> DebugContext<'tcx> {
root.set(gimli::DW_AT_low_pc, AttributeValue::Address(Address::Constant(0)));
}
- DebugContext {
- tcx,
-
- endian,
-
- dwarf,
- unit_range_list: RangeList(Vec::new()),
-
- types: FxHashMap::default(),
- }
- }
-
- fn dwarf_ty(&mut self, ty: Ty<'tcx>) -> UnitEntryId {
- if let Some(type_id) = self.types.get(&ty) {
- return *type_id;
- }
-
- let new_entry = |dwarf: &mut DwarfUnit, tag| dwarf.unit.add(dwarf.unit.root(), tag);
-
- let primitive = |dwarf: &mut DwarfUnit, ate| {
- let type_id = new_entry(dwarf, gimli::DW_TAG_base_type);
- let type_entry = dwarf.unit.get_mut(type_id);
- type_entry.set(gimli::DW_AT_encoding, AttributeValue::Encoding(ate));
- type_id
- };
-
- let name = format!("{}", ty);
- let layout = self.tcx.layout_of(ParamEnv::reveal_all().and(ty)).unwrap();
-
- let type_id = match ty.kind() {
- ty::Bool => primitive(&mut self.dwarf, gimli::DW_ATE_boolean),
- ty::Char => primitive(&mut self.dwarf, gimli::DW_ATE_UTF),
- ty::Uint(_) => primitive(&mut self.dwarf, gimli::DW_ATE_unsigned),
- ty::Int(_) => primitive(&mut self.dwarf, gimli::DW_ATE_signed),
- ty::Float(_) => primitive(&mut self.dwarf, gimli::DW_ATE_float),
- ty::Ref(_, pointee_ty, _mutbl)
- | ty::RawPtr(ty::TypeAndMut { ty: pointee_ty, mutbl: _mutbl }) => {
- let type_id = new_entry(&mut self.dwarf, gimli::DW_TAG_pointer_type);
-
- // Ensure that type is inserted before recursing to avoid duplicates
- self.types.insert(ty, type_id);
-
- let pointee = self.dwarf_ty(*pointee_ty);
-
- let type_entry = self.dwarf.unit.get_mut(type_id);
-
- //type_entry.set(gimli::DW_AT_mutable, AttributeValue::Flag(mutbl == rustc_hir::Mutability::Mut));
- type_entry.set(gimli::DW_AT_type, AttributeValue::UnitRef(pointee));
-
- type_id
- }
- ty::Adt(adt_def, _substs) if adt_def.is_struct() && !layout.is_unsized() => {
- let type_id = new_entry(&mut self.dwarf, gimli::DW_TAG_structure_type);
-
- // Ensure that type is inserted before recursing to avoid duplicates
- self.types.insert(ty, type_id);
-
- let variant = adt_def.non_enum_variant();
-
- for (field_idx, field_def) in variant.fields.iter().enumerate() {
- let field_offset = layout.fields.offset(field_idx);
- let field_layout = layout.field(
- &layout::LayoutCx { tcx: self.tcx, param_env: ParamEnv::reveal_all() },
- field_idx,
- );
-
- let field_type = self.dwarf_ty(field_layout.ty);
-
- let field_id = self.dwarf.unit.add(type_id, gimli::DW_TAG_member);
- let field_entry = self.dwarf.unit.get_mut(field_id);
-
- field_entry.set(
- gimli::DW_AT_name,
- AttributeValue::String(field_def.name.as_str().to_string().into_bytes()),
- );
- field_entry.set(
- gimli::DW_AT_data_member_location,
- AttributeValue::Udata(field_offset.bytes()),
- );
- field_entry.set(gimli::DW_AT_type, AttributeValue::UnitRef(field_type));
- }
-
- type_id
- }
- _ => new_entry(&mut self.dwarf, gimli::DW_TAG_structure_type),
- };
-
- let type_entry = self.dwarf.unit.get_mut(type_id);
-
- type_entry.set(gimli::DW_AT_name, AttributeValue::String(name.into_bytes()));
- type_entry.set(gimli::DW_AT_byte_size, AttributeValue::Udata(layout.size.bytes()));
-
- self.types.insert(ty, type_id);
-
- type_id
- }
-
- fn define_local(&mut self, scope: UnitEntryId, name: String, ty: Ty<'tcx>) -> UnitEntryId {
- let dw_ty = self.dwarf_ty(ty);
-
- let var_id = self.dwarf.unit.add(scope, gimli::DW_TAG_variable);
- let var_entry = self.dwarf.unit.get_mut(var_id);
-
- var_entry.set(gimli::DW_AT_name, AttributeValue::String(name.into_bytes()));
- var_entry.set(gimli::DW_AT_type, AttributeValue::UnitRef(dw_ty));
-
- var_id
+ DebugContext { tcx, endian, dwarf, unit_range_list: RangeList(Vec::new()) }
}
pub(crate) fn define_function(
&mut self,
- instance: Instance<'tcx>,
func_id: FuncId,
name: &str,
- isa: &dyn TargetIsa,
context: &Context,
+ function_span: Span,
source_info_set: &indexmap::IndexSet<SourceInfo>,
- local_map: IndexVec<mir::Local, CPlace<'tcx>>,
) {
let symbol = func_id.as_u32() as usize;
- let mir = self.tcx.instance_mir(instance.def);
// FIXME: add to appropriate scope instead of root
let scope = self.dwarf.unit.root();
entry.set(gimli::DW_AT_name, AttributeValue::StringRef(name_id));
entry.set(gimli::DW_AT_linkage_name, AttributeValue::StringRef(name_id));
- let end = self.create_debug_lines(symbol, entry_id, context, mir.span, source_info_set);
+ let end =
+ self.create_debug_lines(symbol, entry_id, context, function_span, source_info_set);
self.unit_range_list.0.push(Range::StartLength {
begin: Address::Symbol { symbol, addend: 0 },
);
// Using Udata for DW_AT_high_pc requires at least DWARF4
func_entry.set(gimli::DW_AT_high_pc, AttributeValue::Udata(u64::from(end)));
-
- // FIXME make it more reliable and implement scopes before re-enabling this.
- if false {
- let value_labels_ranges = std::collections::HashMap::new(); // FIXME
-
- for (local, _local_decl) in mir.local_decls.iter_enumerated() {
- let ty = self.tcx.subst_and_normalize_erasing_regions(
- instance.substs,
- ty::ParamEnv::reveal_all(),
- mir.local_decls[local].ty,
- );
- let var_id = self.define_local(entry_id, format!("{:?}", local), ty);
-
- let location = place_location(
- self,
- isa,
- symbol,
- &local_map,
- &value_labels_ranges,
- Place { local, projection: ty::List::empty() },
- );
-
- let var_entry = self.dwarf.unit.get_mut(var_id);
- var_entry.set(gimli::DW_AT_location, location);
- }
- }
-
- // FIXME create locals for all entries in mir.var_debug_info
- }
-}
-
-fn place_location<'tcx>(
- debug_context: &mut DebugContext<'tcx>,
- isa: &dyn TargetIsa,
- symbol: usize,
- local_map: &IndexVec<mir::Local, CPlace<'tcx>>,
- #[allow(rustc::default_hash_types)] value_labels_ranges: &std::collections::HashMap<
- ValueLabel,
- Vec<ValueLocRange>,
- >,
- place: Place<'tcx>,
-) -> AttributeValue {
- assert!(place.projection.is_empty()); // FIXME implement them
-
- match local_map[place.local].inner() {
- CPlaceInner::Var(_local, var) => {
- let value_label = cranelift_codegen::ir::ValueLabel::new(var.index());
- if let Some(value_loc_ranges) = value_labels_ranges.get(&value_label) {
- let loc_list = LocationList(
- value_loc_ranges
- .iter()
- .map(|value_loc_range| Location::StartEnd {
- begin: Address::Symbol {
- symbol,
- addend: i64::from(value_loc_range.start),
- },
- end: Address::Symbol { symbol, addend: i64::from(value_loc_range.end) },
- data: translate_loc(isa, value_loc_range.loc).unwrap(),
- })
- .collect(),
- );
- let loc_list_id = debug_context.dwarf.unit.locations.add(loc_list);
-
- AttributeValue::LocationListRef(loc_list_id)
- } else {
- // FIXME set value labels for unused locals
-
- AttributeValue::Exprloc(Expression::new())
- }
- }
- CPlaceInner::VarPair(_, _, _) => {
- // FIXME implement this
-
- AttributeValue::Exprloc(Expression::new())
- }
- CPlaceInner::VarLane(_, _, _) => {
- // FIXME implement this
-
- AttributeValue::Exprloc(Expression::new())
- }
- CPlaceInner::Addr(_, _) => {
- // FIXME implement this (used by arguments and returns)
-
- AttributeValue::Exprloc(Expression::new())
-
- // For PointerBase::Stack:
- //AttributeValue::Exprloc(translate_loc(ValueLoc::Stack(*stack_slot)).unwrap())
- }
- }
-}
-
-// Adapted from https://github.com/CraneStation/wasmtime/blob/5a1845b4caf7a5dba8eda1fef05213a532ed4259/crates/debug/src/transform/expression.rs#L59-L137
-fn translate_loc(isa: &dyn TargetIsa, loc: LabelValueLoc) -> Option<Expression> {
- match loc {
- LabelValueLoc::Reg(reg) => {
- let machine_reg = isa.map_regalloc_reg_to_dwarf(reg).unwrap();
- let mut expr = Expression::new();
- expr.op_reg(gimli::Register(machine_reg));
- Some(expr)
- }
- LabelValueLoc::SPOffset(offset) => {
- let mut expr = Expression::new();
- expr.op_breg(X86_64::RSP, offset);
- Some(expr)
- }
}
}
projects / rust.git / blobdiff