这线程恢复真的是比线程挂起麻烦的多，挂起线程插个apc就结了，线程恢复这块流程和分支非常多，wrk在这块的源码也不全，本次分析的流程和分支仅按照下方测试代码进行，不考虑其它情况；调试的操作系统是WindowsXP，单核
以下操作流程用伪代码表示（非IDA）（if均成立）
如分析有错，欢迎指出
VOID WINAPI testThreadA() {
while (TRUE) {
Sleep(1000);
printf("AAA\n");
}
}
HANDLE threadA = -1;
int main()
{
threadA = CreateThread(0, 0, (LPTHREAD_START_ROUTINE)testThreadA, 0, 0, 0);
SuspendThread(threadA);
__asm {
int 3;
}
ResumeThread(threadA);
system("pause");
return 0;
}
VOID WINAPI testThreadA() {
while (TRUE) {
Sleep(1000);
printf("AAA\n");
}
}
HANDLE threadA = -1;
int main()
{
threadA = CreateThread(0, 0, (LPTHREAD_START_ROUTINE)testThreadA, 0, 0, 0);
SuspendThread(threadA);
__asm {
int 3;
}
ResumeThread(threadA);
system("pause");
return 0;
}
ResumeThread(ThreadHandle);
//↓
NtResumeThread(ThreadHandle);
//↓
PsResumeThread(Thread);
//↓
KeResumeThread(Thread);
//↓
KiWaitTest(Thread->SuspendSemaphore,increment(0));
//↓
KiUnwaitThread(increment(0),OUT &waitListEntry);
//↓
KiUnlinkThread(Thread,increment(0));//断链WaitBlockList
//↓
KiReadyThread(); //挂入调度链表
ResumeThread(ThreadHandle);
//↓
NtResumeThread(ThreadHandle);
//↓
PsResumeThread(Thread);
//↓
KeResumeThread(Thread);
//↓
KiWaitTest(Thread->SuspendSemaphore,increment(0));
//↓
KiUnwaitThread(increment(0),OUT &waitListEntry);
//↓
KiUnlinkThread(Thread,increment(0));//断链WaitBlockList
//↓
KiReadyThread(); //挂入调度链表
KiWaitTest -> KiUnwaitThread -> KiUnlinkThread
-> KiReadyThread
KiWaitTest -> KiUnwaitThread -> KiUnlinkThread
-> KiReadyThread
int __stdcall KeResumeThread(_ETHREAD *Thread)
{
char SuspendCount = Thread->Tcb.SuspendCount;
if ( SuspendCount )//如果没调用过SuspendThread()挂起线程，该值为0
{
char newSuspendCount = SuspendCount - 1;
Thread->Tcb.SuspendCount = newSuspendCount;
if ( !newSuspendCount && !Thread->Tcb.FreezeCount )
{
++Thread->Tcb.SuspendSemaphore.Header.SignalState;
KiWaitTest(&Thread->Tcb.SuspendSemaphore, 0);
}
}
KiUnlockDispatcherDatabase(KeRaiseIrqlToDpcLevel());
return;
}
int __stdcall KeResumeThread(_ETHREAD *Thread)
{
char SuspendCount = Thread->Tcb.SuspendCount;
if ( SuspendCount )//如果没调用过SuspendThread()挂起线程，该值为0
{
char newSuspendCount = SuspendCount - 1;
Thread->Tcb.SuspendCount = newSuspendCount;
if ( !newSuspendCount && !Thread->Tcb.FreezeCount )
{
++Thread->Tcb.SuspendSemaphore.Header.SignalState;
KiWaitTest(&Thread->Tcb.SuspendSemaphore, 0);
}
}
KiUnlockDispatcherDatabase(KeRaiseIrqlToDpcLevel());
return;
}
__fastcall KiWaitTest(_KEVENT *Event, _KTHREAD *Increment)
{
LIST_ENTRY waitListEntry;
waitListEntry.Blink = &waitListEntry;
waitListEntry.Flink = &waitListEntry;
PLIST_ENTRY ListHead = &Event->Header.WaitListHead;
PKWAIT_BLOCK = WaitEntry = Event->Header.WaitListHead.Flink;
if(Event->Header.SignalState > 0){
if ( WaitEntry != ListHead ){
PKTHREAD Thread = WaitEntry->Thread;
if(WaitEntry->WaitType == WaitAny){
USHORT waitStatus = WaitEntry->WaitKey;
UCHAR Type = Event->Header.Type;
}
//获得一个需要挂入调度链表的就绪线程链表
KiUnwaitThread(Thread, waitStatus, increment, &waitListEntry);
WaitEntry = ListHead->Flink;
while(IsListEmpty(&waitListEntry)){
PVOID nextThread = waitListEntry.Flink;
WaitEntry = &waitListEntry;
waitListEntry.Flink = waitListEntry.Flink->Flink;
waitListEntry.Flink->Blink = &waitListEntry;
KiReadyThread((KTHREAD *)(nextThread - 96));
}
}
}
}
__fastcall KiWaitTest(_KEVENT *Event, _KTHREAD *Increment)
{
LIST_ENTRY waitListEntry;
waitListEntry.Blink = &waitListEntry;
waitListEntry.Flink = &waitListEntry;
PLIST_ENTRY ListHead = &Event->Header.WaitListHead;
PKWAIT_BLOCK = WaitEntry = Event->Header.WaitListHead.Flink;
if(Event->Header.SignalState > 0){
if ( WaitEntry != ListHead ){
PKTHREAD Thread = WaitEntry->Thread;
if(WaitEntry->WaitType == WaitAny){
USHORT waitStatus = WaitEntry->WaitKey;
UCHAR Type = Event->Header.Type;
}
//获得一个需要挂入调度链表的就绪线程链表
KiUnwaitThread(Thread, waitStatus, increment, &waitListEntry);
WaitEntry = ListHead->Flink;
while(IsListEmpty(&waitListEntry)){
PVOID nextThread = waitListEntry.Flink;
WaitEntry = &waitListEntry;
waitListEntry.Flink = waitListEntry.Flink->Flink;
waitListEntry.Flink->Blink = &waitListEntry;
KiReadyThread((KTHREAD *)(nextThread - 96));
}
}
}
}
KiUnwaitThread(_KTHREAD *thread, LONG_PTR WaitStatus, int Increment, OUT _LIST_ENTRY *WaitListEntry){
//将线程的等待块摘除
KiUnlinkThread(thread, WaitStatus);
CHAR Priority = thread->Priority;
KPROCESS Process = thread->ApcState.Process;
if ( Priority >= 16 ){
if(WaitListEntry != NULL){
PLIST_ENTRY prev = WaitListEntry->Blink;
PLIST_ENTRY waitList = &thread->WaitListEntry;
thread->WaitListEntry.Flink = WaitListEntry;
thread->WaitListEntry.Blink = Blink;
prev->Flink = &thread->WaitListEntry;
WaitListEntry->Blink = &thread->WaitListEntry;
return;
}
}
}
KiUnwaitThread(_KTHREAD *thread, LONG_PTR WaitStatus, int Increment, OUT _LIST_ENTRY *WaitListEntry){
//将线程的等待块摘除
KiUnlinkThread(thread, WaitStatus);
CHAR Priority = thread->Priority;
KPROCESS Process = thread->ApcState.Process;
if ( Priority >= 16 ){
if(WaitListEntry != NULL){
PLIST_ENTRY prev = WaitListEntry->Blink;
PLIST_ENTRY waitList = &thread->WaitListEntry;
thread->WaitListEntry.Flink = WaitListEntry;
thread->WaitListEntry.Blink = Blink;
prev->Flink = &thread->WaitListEntry;
WaitListEntry->Blink = &thread->WaitListEntry;
return;
}
}
}
BOOL __fastcall KiUnlinkThread(_KTHREAD *Thread, LONG_PTR WaitStatus){
Thread->WaitStatus |= WaitStatus;
WaitBlockList = Thread->WaitBlockList;
do{//将Thread从等待链中断链
PLIST_ENTRY Flink = WaitBlockList->WaitListEntry.Flink;
PLIST_ENTRY Blink = WaitBlockList->WaitListEntry.Blink;
Blink->Flink = WaitBlockList->WaitListEntry.Flink;
Flink->Blink = Blink;
WaitBlockList = WaitBlockList->NextWaitBlock;
}while ( WaitBlockList != Thread->WaitBlockList );
return;
}
BOOL __fastcall KiUnlinkThread(_KTHREAD *Thread, LONG_PTR WaitStatus){
Thread->WaitStatus |= WaitStatus;
WaitBlockList = Thread->WaitBlockList;
do{//将Thread从等待链中断链
PLIST_ENTRY Flink = WaitBlockList->WaitListEntry.Flink;
PLIST_ENTRY Blink = WaitBlockList->WaitListEntry.Blink;
Blink->Flink = WaitBlockList->WaitListEntry.Flink;
Flink->Blink = Blink;
WaitBlockList = WaitBlockList->NextWaitBlock;
}while ( WaitBlockList != Thread->WaitBlockList );
return;
}
KiReadyThread(_KTHREAD *Thread){
//设置字段属性
Thread->State = Standby;
Thread->WaitTime = KeTickCount
Thread->NextProcessor = Thread->IdleProcessor
Thread->State = Ready;
//将线程挂入调度链表
Thread->WaitListEntry.Flink = KiDispatcherReadyListHead
Thread->WaitListEntry.Blink = KiDispatcherReadyListHead.Blink
KiDispatcherReadyListHead.Blink.Flink = Thread->WaitListEntry
KiDispatcherReadyListHead.Blink = Thread->WaitListEntry
KiReadySummary |= 1 << Thread->priority;
}
KiReadyThread(_KTHREAD *Thread){
//设置字段属性
Thread->State = Standby;
Thread->WaitTime = KeTickCount
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