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Code Issues Releases Activity

ams.mitm: avoid using std::unordered_map, it manifests exception code

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This commit is contained in:
Michael Scire 2021-10-07 22:59:16 -07:00
parent 41a4bf53f6
commit 229651fe72
1 changed files with 41 additions and 10 deletions
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51
stratosphere/ams_mitm/source/fs_mitm/fs_mitm_service.cpp
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@ -36,7 +36,40 @@ namespace ams::mitm::fs {
constinit os::SdkMutex g_data_storage_lock;
constinit os::SdkMutex g_storage_cache_lock;
std::unordered_map<u64, std::weak_ptr<fs::IStorage>> g_storage_cache;
class StorageCacheEntry : public util::IntrusiveRedBlackTreeBaseNode<StorageCacheEntry> {
public:
using RedBlackKeyType = u64;
private:
ncm::ProgramId m_program_id;
std::weak_ptr<fs::IStorage> m_storage;
public:
StorageCacheEntry(ncm::ProgramId program_id, const std::shared_ptr<fs::IStorage> *sp) : m_program_id(program_id), m_storage(*sp) { /* ... */ }
constexpr ncm::ProgramId GetProgramId() const { return m_program_id; }
constexpr const std::weak_ptr<fs::IStorage> &GetStorage() const { return m_storage; }
void SetStorage(const std::shared_ptr<fs::IStorage> *sp) { m_storage = *sp; }
static constexpr ALWAYS_INLINE int Compare(const RedBlackKeyType &lval, const StorageCacheEntry &rhs) {
const auto rval = rhs.GetProgramId().value;
if (lval < rval) {
return -1;
} else if (lval == rval) {
return 0;
} else {
return 1;
}
}
static constexpr ALWAYS_INLINE int Compare(const StorageCacheEntry &lhs, const StorageCacheEntry &rhs) {
return Compare(lhs.GetProgramId().value, rhs);
}
};
using StorageCache = typename util::IntrusiveRedBlackTreeBaseTraits<StorageCacheEntry>::TreeType<StorageCacheEntry>;
constinit StorageCache g_storage_cache;
constinit os::SdkMutex g_boot0_detect_lock;
constinit bool g_detected_boot0_kind = false;
@ -60,27 +93,25 @@ namespace ams::mitm::fs {
std::shared_ptr<fs::IStorage> GetStorageCacheEntry(ncm::ProgramId program_id) {
std::scoped_lock lk(g_storage_cache_lock);
auto it = g_storage_cache.find(static_cast<u64>(program_id));
if (it == g_storage_cache.end()) {
if (const auto it = g_storage_cache.find_key(program_id.value); it != g_storage_cache.end()) {
return it->GetStorage().lock();
} else {
return nullptr;
}
return it->second.lock();
}
void SetStorageCacheEntry(ncm::ProgramId program_id, std::shared_ptr<fs::IStorage> *new_intf) {
std::scoped_lock lk(g_storage_cache_lock);
auto it = g_storage_cache.find(static_cast<u64>(program_id));
if (it != g_storage_cache.end()) {
auto cur_intf = it->second.lock();
if (cur_intf != nullptr) {
if (auto it = g_storage_cache.find_key(program_id.value); it != g_storage_cache.end()) {
if (auto cur_intf = it->GetStorage().lock(); cur_intf != nullptr) {
*new_intf = cur_intf;
return;
}
}
g_storage_cache[static_cast<u64>(program_id)] = *new_intf;
auto *new_entry = new StorageCacheEntry(program_id, new_intf);
g_storage_cache.insert(*new_entry);
}
bool GetSettingsItemBooleanValue(const char *name, const char *key) {