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correct order

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This commit is contained in:
Akash Mozumdar 2019-09-16 17:19:54 -04:00
parent f9e1e61d51
commit 1aa381dff3
1 changed files with 12 additions and 17 deletions
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27
texthook/hookfinder.cc
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@ -10,8 +10,6 @@ extern const char* OUT_OF_RECORDS_RETRY;
extern const char* NOT_ENOUGH_TEXT;
extern const char* COULD_NOT_FIND;
extern WinMutex viewMutex;
namespace
{
SearchParam sp;
@ -26,7 +24,6 @@ namespace
std::unique_ptr<HookRecord[]> records;
long recordsAvailable;
uint64_t signatureCache[CACHE_SIZE] = {};
long sumCache[CACHE_SIZE] = {};
uintptr_t pageCache[CACHE_SIZE] = {};
#ifndef _WIN64
@ -149,18 +146,15 @@ 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 = _InterlockedDecrement(&recordsAvailable);
if (n > 0)
long n = sp.maxRecords - _InterlockedDecrement(&recordsAvailable);
if (n < sp.maxRecords)
{
records[n].address = address;
records[n].offset = i * sizeof(char*);
for (int j = 0; j < length; ++j) records[n].text[j] = str[j];
records[n].text[length] = 0;
}
if (n == 0)
if (n == sp.maxRecords)
{
spDefault.maxRecords = sp.maxRecords * 2;
ConsoleOutput(OUT_OF_RECORDS_RETRY);
@ -195,6 +189,7 @@ void SearchForHooks(SearchParam spUser)
{
static std::mutex m;
std::scoped_lock lock(m);
*(void**)(trampoline + send_offset) = Send;
sp = spUser.length == 0 ? spDefault : spUser;
@ -203,6 +198,11 @@ void SearchForHooks(SearchParam spUser)
catch (std::bad_alloc) { ConsoleOutput("Textractor: SearchForHooks ERROR: out of memory, retrying to allocate %d", sp.maxRecords /= 2); }
while (!records && sp.maxRecords);
ConsoleOutput(STARTING_SEARCH);
std::vector<uint64_t> addresses;
if (*sp.module) addresses = GetFunctions((uintptr_t)GetModuleHandleW(sp.module));
else for (auto& addr : addresses = Util::SearchMemory(sp.pattern, sp.length, PAGE_EXECUTE, sp.minAddress, sp.maxAddress)) addr += sp.offset;
uintptr_t moduleStartAddress = (uintptr_t)GetModuleHandleW(ITH_DLL);
uintptr_t moduleStopAddress = moduleStartAddress;
MEMORY_BASIC_INFORMATION info;
@ -212,13 +212,8 @@ void SearchForHooks(SearchParam spUser)
moduleStopAddress = (uintptr_t)info.BaseAddress + info.RegionSize;
} while (info.Protect >= PAGE_EXECUTE);
moduleStopAddress -= info.RegionSize;
ConsoleOutput(STARTING_SEARCH);
std::vector<uint64_t> addresses;
if (*sp.module) addresses = GetFunctions((uintptr_t)GetModuleHandleW(sp.module));
else for (auto& addr : addresses = Util::SearchMemory(sp.pattern, sp.length, PAGE_EXECUTE, sp.minAddress, sp.maxAddress)) addr += sp.offset;
addresses.erase(std::remove_if(addresses.begin(), addresses.end(), [&](uint64_t addr) { return addr > moduleStartAddress && addr < moduleStopAddress; }), addresses.end());
*(void**)(trampoline + send_offset) = Send;
auto trampolines = (decltype(trampoline)*)VirtualAlloc(NULL, sizeof(trampoline) * addresses.size(), MEM_COMMIT, PAGE_READWRITE);
VirtualProtect(trampolines, addresses.size() * sizeof(trampoline), PAGE_EXECUTE_READWRITE, DUMMY);
for (int i = 0; i < addresses.size(); ++i)
@ -253,7 +248,7 @@ void SearchForHooks(SearchParam spUser)
}
records.reset();
VirtualFree(trampolines, 0, MEM_RELEASE);
for (int i = 0; i < CACHE_SIZE; ++i) signatureCache[i] = sumCache[i] = pageCache[i] = 0;
for (int i = 0; i < CACHE_SIZE; ++i) signatureCache[i] = 0;
}).detach();
}