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Setup a split resolver cache

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Jeremy 2024-05-28 20:32:41 -05:00
parent 6c43e376ed
commit 56efcfa969
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GPG Key ID: 19AA8270105E8EB4
1 changed files with 26 additions and 5 deletions
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31
src/symbols/dwarf/dwarf_resolver.cpp
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@ -93,6 +93,8 @@ namespace libdwarf {
bool generated_cu_cache = false;
// Map from CU -> {srcfiles, count}
std::unordered_map<Dwarf_Off, std::pair<char**, Dwarf_Signed>> srcfiles_cache;
// Map from CU -> split full cu resolver
std::unordered_map<Dwarf_Off, std::unique_ptr<dwarf_resolver>> split_full_cu_resolvers;
// info for resolving a dwo object
optional<skeleton_info> skeleton;
@ -962,11 +964,30 @@ namespace libdwarf {
// maybe default to dwo_name but for now not doing anything
return;
}
dwarf_resolver resolver(
path,
skeleton_info{cu_die.clone(), dwversion, *this}
);
auto res = resolver.resolve_frame(object_frame_info);
// todo: slight inefficiency in this copy-back strategy due to other frame members
frame_with_inlines res;
if(get_cache_mode() == cache_mode::prioritize_memory) {
dwarf_resolver resolver(
path,
skeleton_info{cu_die.clone(), dwversion, *this}
);
res = resolver.resolve_frame(object_frame_info);
} else {
auto off = cu_die.get_global_offset();
auto it = split_full_cu_resolvers.find(off);
if(it == split_full_cu_resolvers.end()) {
it = split_full_cu_resolvers.emplace(
off,
std::unique_ptr<dwarf_resolver>(
new dwarf_resolver(
path,
skeleton_info{cu_die.clone(), dwversion, *this}
)
)
).first;
}
res = it->second->resolve_frame(object_frame_info);
}
frame = std::move(res.frame);
inlines = std::move(res.inlines);
}