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readd sum cache, it is useful

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This commit is contained in:
Akash Mozumdar 2020-01-12 02:22:39 -07:00
parent cbd5b01385
commit 8e719b2964
3 changed files with 7 additions and 3 deletions
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2
include/common.h
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@ -26,7 +26,7 @@ constexpr bool x64 = true;
constexpr bool x64 = false;
#endif
template <typename T> using Array = T[];
template <typename T, typename... X> using Array = std::conditional_t<sizeof...(X), std::tuple<T, X...>[], T[]>;
template <auto F> using Functor = std::integral_constant<std::decay_t<decltype(F)>, F>;

2
text.cpp
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@ -102,7 +102,7 @@ const char* TOO_MANY_HOOKS = u8"Textractor: too many hooks: can't insert";
const char* STARTING_SEARCH = u8"Textractor: starting search";
const char* NOT_ENOUGH_TEXT = u8"Textractor: not enough text to search accurately";
const char* HOOK_SEARCH_INITIALIZED = u8"Textractor: search initialized with %zd hooks";
const char* MAKE_GAME_PROCESS_TEXT = u8"Textractor: please click around in the game to force it to process text during the next %d seconds!";
const char* MAKE_GAME_PROCESS_TEXT = u8"Textractor: please click around in the game to force it to process text during the next %d seconds";
const char* HOOK_SEARCH_FINISHED = u8"Textractor: hook search finished, %d results found";
const char* OUT_OF_RECORDS_RETRY = u8"Textractor: out of search records, please retry if results are poor (default record count increased)";
const char* FUNC_MISSING = u8"Textractor: function not present";

6
texthook/hookfinder.cc
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@ -25,6 +25,7 @@ namespace
std::unique_ptr<HookRecord[]> records;
long recordsAvailable;
uint64_t signatureCache[CACHE_SIZE] = {};
long sumCache[CACHE_SIZE] = {};
uintptr_t pageCache[CACHE_SIZE] = {};
#ifndef _WIN64
@ -147,6 +148,9 @@ void Send(char** stack, uintptr_t address)
uint64_t signature = ((uint64_t)i << 56) | ((uint64_t)(str[2] + str[3]) << 48) | address;
if (signatureCache[signature % CACHE_SIZE] == signature) continue;
signatureCache[signature % CACHE_SIZE] = signature;
// if there are huge amount of strings that are the same, it's probably garbage: filter them out
// can't store all the strings, so use sum as heuristic instead
if (_InterlockedIncrement(sumCache + (sum % CACHE_SIZE)) > 25) continue;
long n = sp.maxRecords - _InterlockedDecrement(&recordsAvailable);
if (n < sp.maxRecords)
{
@ -243,7 +247,7 @@ void SearchForHooks(SearchParam spUser)
}
records.reset();
VirtualFree(trampolines, 0, MEM_RELEASE);
for (int i = 0; i < CACHE_SIZE; ++i) signatureCache[i] = 0;
for (int i = 0; i < CACHE_SIZE; ++i) signatureCache[i] = sumCache[i] = 0;
}).detach();
}