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LibCoredump: Copy out the FooInfo structs to an aligned address

We were handing out unaligned pointers to these, which made UBSAN super
mad, copy them out to avoid that.
This commit is contained in:
Ali Mohammad Pur 2022-01-27 14:20:10 +03:30 committed by Linus Groh
parent e0db9cb876
commit e72521f286
5 changed files with 56 additions and 22 deletions

View file

@ -135,8 +135,8 @@ bool Reader::NotesEntryIterator::at_end() const
Optional<FlatPtr> Reader::peek_memory(FlatPtr address) const
{
const auto* region = region_containing(address);
if (!region)
auto region = region_containing(address);
if (!region.has_value())
return {};
FlatPtr offset_in_region = address - region->region_start;
@ -167,12 +167,12 @@ const JsonObject Reader::process_info() const
// FIXME: Maybe just cache this on the Reader instance after first access.
}
ELF::Core::MemoryRegionInfo const* Reader::first_region_for_object(StringView object_name) const
Optional<MemoryRegionInfo> Reader::first_region_for_object(StringView object_name) const
{
ELF::Core::MemoryRegionInfo const* ret = nullptr;
Optional<MemoryRegionInfo> ret;
for_each_memory_region_info([&ret, &object_name](auto& region_info) {
if (region_info.object_name() == object_name) {
ret = &region_info;
ret = region_info;
return IterationDecision::Break;
}
return IterationDecision::Continue;
@ -180,12 +180,12 @@ ELF::Core::MemoryRegionInfo const* Reader::first_region_for_object(StringView ob
return ret;
}
const ELF::Core::MemoryRegionInfo* Reader::region_containing(FlatPtr address) const
Optional<MemoryRegionInfo> Reader::region_containing(FlatPtr address) const
{
const ELF::Core::MemoryRegionInfo* ret = nullptr;
for_each_memory_region_info([&ret, address](const ELF::Core::MemoryRegionInfo& region_info) {
Optional<MemoryRegionInfo> ret;
for_each_memory_region_info([&ret, address](const auto& region_info) {
if (region_info.region_start <= address && region_info.region_end >= address) {
ret = &region_info;
ret = region_info;
return IterationDecision::Break;
}
return IterationDecision::Continue;
@ -272,8 +272,8 @@ HashMap<String, String> Reader::metadata() const
const Reader::LibraryData* Reader::library_containing(FlatPtr address) const
{
static HashMap<String, OwnPtr<LibraryData>> cached_libs;
auto* region = region_containing(address);
if (!region)
auto region = region_containing(address);
if (!region.has_value())
return {};
auto name = region->object_name();
@ -300,7 +300,7 @@ const Reader::LibraryData* Reader::library_containing(FlatPtr address) const
void Reader::for_each_library(Function<void(LibraryInfo)> func) const
{
HashTable<String> libraries;
for_each_memory_region_info([&](ELF::Core::MemoryRegionInfo const& region) {
for_each_memory_region_info([&](auto const& region) {
auto name = region.object_name();
if (name.is_null() || libraries.contains(name))
return IterationDecision::Continue;