SmartInjector/thread.cpp at main · sssssssthedev/SmartInjector · GitHub

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#include "include/thread.h"

Thread::Thread(int tid) : tid(tid), handle(nullptr) { }

int Thread::get_tid() const
{
	return this->tid;
}

HANDLE Thread::get_handle()
{
    if (handle != nullptr) {
        return handle;
    }

    if (this->tid == 0) {
        printf("[%s] Cannot get handle, TID is 0.\n", __FUNCTION__);
        return nullptr;
    }
    HANDLE h = OpenThread(THREAD_SUSPEND_RESUME | THREAD_QUERY_INFORMATION, FALSE, this->tid);

    if (h == NULL) {
        DWORD lastError = GetLastError();
        printf("[%s] OpenThread failed. Error: %lu (0x%lx).\n", __FUNCTION__, this->tid, lastError, lastError);
        return nullptr;
    }
    handle = h;
    return handle;
}

bool Thread::suspend() {
    HANDLE h = get_handle();
    if (h == nullptr) {
        printf("[%s] Cannot suspend, handle is invalid/null (TID: %d).\n", __FUNCTION__, this->tid);
        return false;
    }
    DWORD suspendCount = SuspendThread(h);
    if (suspendCount == (DWORD)-1) {
        DWORD lastError = GetLastError();
        printf("[%s] SuspendThread (Win32) failed for TID %d (Error: %lu / 0x%lx)\n", __FUNCTION__, this->tid, lastError, lastError);
        return false;
    }
    return true;
}

bool Thread::resume() {
    HANDLE h = get_handle();
    if (h == nullptr) {
        printf("[%s] Cannot resume, handle is invalid/null (TID: %d).\n", __FUNCTION__, this->tid);
        return false;
    }
    DWORD suspendCount = ResumeThread(h);
    if (suspendCount == (DWORD)-1) {
        DWORD lastError = GetLastError();
        printf("[%s] ResumeThread (Win32) failed for TID %d (Error: %lu / 0x%lx)\n", __FUNCTION__, this->tid, lastError, lastError);
        return false;
    }
    return true;
}

bool Thread::context(CONTEXT& ctx) {
    HANDLE h = get_handle();
    ctx.ContextFlags = CONTEXT_ALL;
    NTSTATUS status = Sw3NtGetContextThread(h, &ctx);
    return NT_SUCCESS(status);
}

bool Thread::set_context(CONTEXT ctx) {
    HANDLE h = get_handle();
    NTSTATUS status = Sw3NtSetContextThread(h, &ctx);
    return NT_SUCCESS(status);
}

Thread::Thread(Thread&& other) noexcept : tid(other.tid) {
    handle = std::exchange(other.handle, nullptr);
}

Thread& Thread::operator=(Thread&& other) noexcept {
    if (this != &other) {
        if (handle != nullptr) {
            CloseHandle(handle);
        }
        tid = other.tid;
        handle = std::exchange(other.handle, nullptr);
    }
    return *this;
}

Thread::~Thread()
{
    if (handle != nullptr) {
        CloseHandle(handle);
        handle = nullptr;
    }
}