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LibDebug+Everywhere: Make DebugInfo not own the ELF image

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This is required to avoid copying the image where otherwise a reference
would be enough.
This commit is contained in:
Ali Mohammad Pur 2021-08-06 00:35:36 +04:30 committed by Andreas Kling
parent 521217735b
commit c4437e19bd
Notes: sideshowbarker 2024-07-18 07:25:13 +09:00 
Author: https://github.com/alimpfard
Commit: https://github.com/SerenityOS/serenity/commit/c4437e19bdb
Pull-request: https://github.com/SerenityOS/serenity/pull/9227
9 changed files with 23 additions and 14 deletions
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5
Userland/DevTools/UserspaceEmulator/Emulator.cpp
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@ -419,8 +419,9 @@ MmapRegion const* Emulator::load_library_from_adress(FlatPtr address)
if (file_or_error.is_error())
return {};
auto debug_info = make<Debug::DebugInfo>(make<ELF::Image>(file_or_error.value()->bytes()));
m_dynamic_library_cache.set(lib_path, CachedELF { file_or_error.release_value(), move(debug_info) });
auto image = make<ELF::Image>(file_or_error.value()->bytes());
auto debug_info = make<Debug::DebugInfo>(*image);
m_dynamic_library_cache.set(lib_path, CachedELF { file_or_error.release_value(), move(debug_info), move(image) });
}
return region;
}

1
Userland/DevTools/UserspaceEmulator/Emulator.h
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@ -257,6 +257,7 @@ private:
struct CachedELF {
NonnullRefPtr<MappedFile> mapped_file;
NonnullOwnPtr<Debug::DebugInfo> debug_info;
NonnullOwnPtr<ELF::Image> image;
};
HashMap<String, CachedELF> m_dynamic_library_cache;

3
Userland/Libraries/LibCoreDump/Backtrace.cpp
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@ -35,7 +35,8 @@ ELFObjectInfo const* Backtrace::object_info_for_region(ELF::Core::MemoryRegionIn
return nullptr;
auto image = make<ELF::Image>(file_or_error.value()->bytes());
auto info = make<ELFObjectInfo>(file_or_error.release_value(), make<Debug::DebugInfo>(move(image)));
auto& image_reference = *image;
auto info = make<ELFObjectInfo>(file_or_error.release_value(), make<Debug::DebugInfo>(image_reference), move(image));
auto* info_ptr = info.ptr();
m_debug_info_cache.set(path, move(info));
return info_ptr;

4
Userland/Libraries/LibCoreDump/Backtrace.h
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@ -14,14 +14,16 @@
namespace CoreDump {
struct ELFObjectInfo {
ELFObjectInfo(NonnullRefPtr<MappedFile> file, NonnullOwnPtr<Debug::DebugInfo>&& debug_info)
ELFObjectInfo(NonnullRefPtr<MappedFile> file, NonnullOwnPtr<Debug::DebugInfo>&& debug_info, NonnullOwnPtr<ELF::Image> image)
: file(move(file))
, debug_info(move(debug_info))
, image(move(image))
{
}
NonnullRefPtr<MappedFile> file;
NonnullOwnPtr<Debug::DebugInfo> debug_info;
NonnullOwnPtr<ELF::Image> image;
};
class Backtrace {

6
Userland/Libraries/LibDebug/DebugInfo.cpp
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@ -15,11 +15,11 @@
namespace Debug {
DebugInfo::DebugInfo(NonnullOwnPtr<const ELF::Image> elf, String source_root, FlatPtr base_address)
: m_elf(move(elf))
DebugInfo::DebugInfo(ELF::Image const& elf, String source_root, FlatPtr base_address)
: m_elf(elf)
, m_source_root(move(source_root))
, m_base_address(base_address)
, m_dwarf_info(*m_elf)
, m_dwarf_info(m_elf)
{
prepare_variable_scopes();
prepare_lines();

6
Userland/Libraries/LibDebug/DebugInfo.h
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@ -24,9 +24,9 @@ class DebugInfo {
AK_MAKE_NONMOVABLE(DebugInfo);
public:
explicit DebugInfo(NonnullOwnPtr<const ELF::Image>, String source_root = {}, FlatPtr base_address = 0);
explicit DebugInfo(ELF::Image const&, String source_root = {}, FlatPtr base_address = 0);
ELF::Image const& elf() const { return *m_elf; }
ELF::Image const& elf() const { return m_elf; }
struct SourcePosition {
FlyString file_path;
@ -124,7 +124,7 @@ private:
Optional<Dwarf::LineProgram::DirectoryAndFile> get_source_path_of_inline(const Dwarf::DIE&) const;
Optional<uint32_t> get_line_of_inline(const Dwarf::DIE&) const;
NonnullOwnPtr<const ELF::Image> m_elf;
ELF::Image const& m_elf;
String m_source_root;
FlatPtr m_base_address { 0 };
Dwarf::DwarfInfo m_dwarf_info;

5
Userland/Libraries/LibDebug/DebugSession.cpp
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@ -448,8 +448,9 @@ void DebugSession::update_loaded_libs()
return IterationDecision::Continue;
FlatPtr base_address = entry.as_object().get("address").to_addr();
auto debug_info = make<DebugInfo>(make<ELF::Image>(file_or_error.value()->bytes()), m_source_root, base_address);
auto lib = make<LoadedLibrary>(lib_name, file_or_error.release_value(), move(debug_info), base_address);
auto image = make<ELF::Image>(file_or_error.value()->bytes());
auto debug_info = make<DebugInfo>(*image, m_source_root, base_address);
auto lib = make<LoadedLibrary>(lib_name, file_or_error.release_value(), move(image), move(debug_info), base_address);
m_loaded_libraries.set(lib_name, move(lib));
return IterationDecision::Continue;

4
Userland/Libraries/LibDebug/DebugSession.h
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@ -129,12 +129,14 @@ public:
struct LoadedLibrary {
String name;
NonnullRefPtr<MappedFile> file;
NonnullOwnPtr<ELF::Image> image;
NonnullOwnPtr<DebugInfo> debug_info;
FlatPtr base_address;
LoadedLibrary(String const& name, NonnullRefPtr<MappedFile> file, NonnullOwnPtr<DebugInfo>&& debug_info, FlatPtr base_address)
LoadedLibrary(String const& name, NonnullRefPtr<MappedFile> file, NonnullOwnPtr<ELF::Image> image, NonnullOwnPtr<DebugInfo>&& debug_info, FlatPtr base_address)
: name(name)
, file(move(file))
, image(move(image))
, debug_info(move(debug_info))
, base_address(base_address)
{

3
Userland/Libraries/LibSymbolication/Symbolication.cpp
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@ -18,6 +18,7 @@ namespace Symbolication {
struct CachedELF {
NonnullRefPtr<MappedFile> mapped_file;
NonnullOwnPtr<Debug::DebugInfo> debug_info;
NonnullOwnPtr<ELF::Image> image;
};
static HashMap<String, OwnPtr<CachedELF>> s_cache;
@ -73,7 +74,7 @@ Optional<Symbol> symbolicate(String const& path, FlatPtr address)
s_cache.set(path, {});
{};
}
auto cached_elf = make<CachedELF>(mapped_file.release_value(), make<Debug::DebugInfo>(move(elf)));
auto cached_elf = make<CachedELF>(mapped_file.release_value(), make<Debug::DebugInfo>(*elf), move(elf));
s_cache.set(path, move(cached_elf));
}