RGBCube/serenity
1
Fork 0
mirror of https://github.com/RGBCube/serenity synced 2025-07-25 22:37:35 +00:00
Code Issues Activity Actions

LibDebug: Parse DWARF information entries

Browse source 
We can now iterate the tree structure of the DIEs, access attribute
values and parse some very basic DWARF expressions.
This commit is contained in:
Itamar 2020-05-04 12:14:39 +03:00 • committed by Andreas Kling
parent 2cafc36d9c
commit c5eb20d0cc
14 changed files with 1067 additions and 3 deletions
Download patch file Download diff file Expand all files Collapse all files

37
Libraries/LibDebug/DebugInfo.h
View file

@ -26,11 +26,15 @@
#pragma once
#include <AK/NonnullOwnPtrVector.h>
#include <AK/NonnullRefPtr.h>
#include <AK/Optional.h>
#include <AK/Vector.h>
#include <LibDebug/Dwarf/DwarfInfo.h>
#include <LibELF/Loader.h>
#include <Libraries/LibDebug/Dwarf/DIE.h>
#include <Libraries/LibDebug/Dwarf/LineProgram.h>
#include <sys/arch/i386/regs.h>
class DebugInfo {
public:
@ -45,6 +49,33 @@ public:
bool operator!=(const SourcePosition& other) const { return !(*this == other); }
};
struct VariableInfo {
enum class LocationType {
None,
Address,
Regsiter,
};
String name;
String type;
LocationType location_type { LocationType::None };
union {
u32 address;
} location_data { 0 };
NonnullOwnPtrVector<VariableInfo> members;
VariableInfo* parent { nullptr };
};
struct VariablesScope {
bool is_function { false };
Optional<String> name;
u32 address_low { 0 };
u32 address_high { 0 };
Vector<Dwarf::DIE> dies_of_variables;
};
NonnullOwnPtrVector<VariableInfo> get_variables_in_current_scope(const PtraceRegisters&) const;
Optional<SourcePosition> get_source_position(u32 address) const;
Optional<u32> get_instruction_from_source(const String& file, size_t line) const;
@ -63,9 +94,15 @@ public:
}
private:
void prepare_variable_scopes();
void prepare_lines();
void parse_scopes_impl(const Dwarf::DIE& die);
Optional<VariablesScope> get_scope(u32 instruction_pointer) const;
NonnullOwnPtr<VariableInfo> create_variable_info(const Dwarf::DIE& variable_die, const PtraceRegisters&) const;
NonnullRefPtr<const ELF::Loader> m_elf;
NonnullRefPtr<Dwarf::DwarfInfo> m_dwarf_info;
Vector<VariablesScope> m_scopes;
Vector<LineProgram::LineInfo> m_sorted_lines;
};