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LibDebug: Support shared libraries

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DebugSession now makes the loader stop after loading the libraries,
and parses the loaded libraries of the program before continuing its
execution.

DebugSession now also supports inserting a breakpoint at a given symbol
or source position.
Additionally, DebugInfo now takes the base address of its object into
consideration.
This commit is contained in:
Itamar 2021-01-06 21:49:25 +02:00 • committed by Andreas Kling
parent ca9d6d21b5
commit 4b91e7c821
6 changed files with 328 additions and 53 deletions
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31
Libraries/LibDebug/DebugInfo.h
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@ -40,14 +40,30 @@ namespace Debug {
class DebugInfo {
public:
explicit DebugInfo(NonnullOwnPtr<const ELF::Image>);
explicit DebugInfo(NonnullOwnPtr<const ELF::Image>, String source_root = {}, FlatPtr base_address = 0);
const ELF::Image& elf() const { return *m_elf; }
struct SourcePosition {
FlyString file_path;
size_t line_number { 0 };
u32 address_of_first_statement { 0 };
Optional<u32> address_of_first_statement;
SourcePosition()
: SourcePosition(String::empty(), 0)
{
}
SourcePosition(String file_path, size_t line_number)
: file_path(file_path)
, line_number(line_number)
{
}
SourcePosition(String file_path, size_t line_number, u32 address_of_first_statement)
: file_path(file_path)
, line_number(line_number)
, address_of_first_statement(address_of_first_statement)
{
}
bool operator==(const SourcePosition& other) const { return file_path == other.file_path && line_number == other.line_number; }
bool operator!=(const SourcePosition& other) const { return !(*this == other); }
@ -93,7 +109,14 @@ public:
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;
struct SourcePositionAndAddress {
String file;
size_t line;
FlatPtr address;
};
Optional<SourcePositionAndAddress> get_address_from_source_position(const String& file, size_t line) const;
template<typename Callback>
void for_each_source_position(Callback callback) const
@ -120,6 +143,8 @@ private:
OwnPtr<VariableInfo> create_variable_info(const Dwarf::DIE& variable_die, const PtraceRegisters&) const;
NonnullOwnPtr<const ELF::Image> m_elf;
String m_source_root;
FlatPtr m_base_address { 0 };
Dwarf::DwarfInfo m_dwarf_info;
Vector<VariablesScope> m_scopes;