mirror of
https://github.com/reactos/reactos.git
synced 2024-11-01 04:11:30 +00:00
486 lines
14 KiB
C++
486 lines
14 KiB
C++
////////////////////////////////////////////////////////////////////
|
|
// Copyright (C) Alexander Telyatnikov, Ivan Keliukh, Yegor Anchishkin, SKIF Software, 1999-2013. Kiev, Ukraine
|
|
// All rights reserved
|
|
// This file was released under the GPLv2 on June 2015.
|
|
////////////////////////////////////////////////////////////////////
|
|
/*
|
|
|
|
Module Name:
|
|
|
|
DLDetect.cpp
|
|
|
|
Abstract:
|
|
|
|
This file contains all source code related to DeadLock Detector.
|
|
|
|
Environment:
|
|
|
|
NT Kernel Mode
|
|
|
|
*/
|
|
|
|
#include "udffs.h"
|
|
|
|
/// define the file specific bug-check id
|
|
#define UDF_BUG_CHECK_ID UDF_FILE_DLD
|
|
|
|
|
|
/// Resource event (ExclusiveWaiters)
|
|
#define RESOURCE_EVENT_TAG 'vEeR'
|
|
/// Resource semaphore (SharedWaiters)
|
|
#define RESOURCE_SEMAFORE_TAG 'eSeR'
|
|
/// Resource owner table (OwnerTable)
|
|
#define RESOURCE_TABLE_TAG 'aTeR'
|
|
|
|
/// Maxmum recurse level while exploring thread-resource aquisition graf
|
|
#define DLD_MAX_REC_LEVEL 40
|
|
|
|
/// Maximum supported number of threads (initialized by DLDInit())
|
|
ULONG MaxThreadCount = 0;
|
|
|
|
/// Waiters table
|
|
PTHREAD_STRUCT DLDThreadTable;
|
|
/// 4 sec
|
|
LARGE_INTEGER DLDpTimeout;
|
|
/// 8 sec
|
|
ULONG DLDpResourceTimeoutCount = 0x2;
|
|
|
|
THREAD_REC_BLOCK DLDThreadAcquireChain[DLD_MAX_REC_LEVEL];
|
|
|
|
/// Initialize deadlock detector
|
|
VOID DLDInit(ULONG MaxThrdCount /// Maximum supported number of threads
|
|
) {
|
|
if (KeNumberProcessors>1) {
|
|
UDFPrint(("Deadlock Detector is designed for uniprocessor machines only!\n"));
|
|
BrutePoint();
|
|
}
|
|
DLDpTimeout.QuadPart = -40000000I64;
|
|
|
|
MaxThreadCount = MaxThrdCount;
|
|
DLDThreadTable = (PTHREAD_STRUCT) DLDAllocatePool(MaxThreadCount*sizeof(THREAD_STRUCT));
|
|
RtlZeroMemory(DLDThreadTable, sizeof(THREAD_STRUCT)*MaxThreadCount);
|
|
}
|
|
|
|
VOID DLDFree(VOID) {
|
|
|
|
DLDFreePool(DLDThreadTable);
|
|
|
|
}
|
|
|
|
PTHREAD_STRUCT DLDAllocFindThread(ULONG ThreadId) {
|
|
ULONG i = 0;
|
|
PTHREAD_STRUCT Temp = DLDThreadTable;
|
|
ULONG FirstEmpty = -1;
|
|
|
|
while (i<MaxThreadCount) {
|
|
if (Temp->ThreadId == ThreadId) {
|
|
return Temp;
|
|
} else if (FirstEmpty == -1 && !Temp->ThreadId) {
|
|
FirstEmpty = i;
|
|
}
|
|
Temp++;
|
|
i++;
|
|
}
|
|
// Not found. Allocate new one.
|
|
if (i == MaxThreadCount) {
|
|
if (FirstEmpty == -1) {
|
|
UDFPrint(("Not enough table entries. Try to increase MaxThrdCount on next build"));
|
|
BrutePoint();
|
|
}
|
|
i = FirstEmpty;
|
|
}
|
|
Temp = DLDThreadTable + i;
|
|
|
|
RtlZeroMemory(Temp, sizeof(THREAD_STRUCT));
|
|
Temp->ThreadId = ThreadId;
|
|
|
|
return Temp;
|
|
}
|
|
|
|
PTHREAD_STRUCT DLDFindThread(ULONG ThreadId) {
|
|
ULONG i = 0;
|
|
PTHREAD_STRUCT Temp = DLDThreadTable;
|
|
ULONG FirstEmpty = -1;
|
|
|
|
|
|
while (i<MaxThreadCount) {
|
|
if (Temp->ThreadId == ThreadId) {
|
|
return Temp;
|
|
}
|
|
Temp++;
|
|
i++;
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
BOOLEAN DLDProcessResource(PERESOURCE Resource,
|
|
PTHREAD_STRUCT ThrdStruct,
|
|
ULONG RecLevel);
|
|
|
|
|
|
/// TRUE Indicates deadlock
|
|
BOOLEAN DLDProcessThread(PTHREAD_STRUCT ThrdOwner,
|
|
PTHREAD_STRUCT ThrdStruct,
|
|
PERESOURCE Resource,
|
|
ULONG RecLevel) {
|
|
|
|
if (ThrdOwner == ThrdStruct) {
|
|
// ERESOURCE wait cycle. Deadlock detected.
|
|
UDFPrint(("DLD: *********DEADLOCK DETECTED*********\n"));
|
|
UDFPrint(("Thread %x holding resource %x\n",ThrdOwner->ThreadId,Resource));
|
|
return TRUE;
|
|
}
|
|
|
|
for (int i=RecLevel+1;i<DLD_MAX_REC_LEVEL;i++) {
|
|
if (DLDThreadAcquireChain[i].Thread->ThreadId == ThrdOwner->ThreadId) {
|
|
// ERESOURCE wait cycle. Deadlock detected.
|
|
UDFPrint(("DLD: *********DEADLOCK DETECTED*********\n"));
|
|
UDFPrint(("Thread %x holding resource %x\n",ThrdOwner->ThreadId,Resource));
|
|
for (int j=RecLevel+1;j<=i;j++) {
|
|
UDFPrint((" awaited by thread %x at (BugCheckId:%x:Line:%d) holding resource %x\n",
|
|
DLDThreadAcquireChain[i].Thread->ThreadId,
|
|
DLDThreadAcquireChain[i].Thread->BugCheckId,
|
|
DLDThreadAcquireChain[i].Thread->Line,
|
|
Resource));
|
|
}
|
|
BrutePoint();
|
|
return FALSE;
|
|
}
|
|
}
|
|
DLDThreadAcquireChain[RecLevel].Thread = ThrdOwner;
|
|
DLDThreadAcquireChain[RecLevel].HoldingResource = Resource;
|
|
|
|
// Find resource, awaited by thread
|
|
if (ThrdOwner->WaitingResource) {
|
|
if (DLDProcessResource(ThrdOwner->WaitingResource, ThrdStruct,RecLevel)) {
|
|
UDFPrint((" awaited by thread %x at (BugCheckId:%x:Line:%d) holding resource %x\n",
|
|
ThrdOwner->ThreadId,
|
|
ThrdOwner->BugCheckId,
|
|
ThrdOwner->Line,
|
|
Resource));
|
|
return TRUE;
|
|
}
|
|
}
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
|
|
/// TRUE Indicates deadlock
|
|
BOOLEAN DLDProcessResource( PERESOURCE Resource, // resource to process
|
|
PTHREAD_STRUCT ThrdStruct, // thread structure of caller's thread
|
|
ULONG RecLevel) // current recurse level
|
|
{
|
|
if (RecLevel <= 0) {
|
|
BrutePoint();
|
|
return FALSE;
|
|
}
|
|
|
|
|
|
// If resource is free, just return. Not possible, but we must check.
|
|
if (!Resource->ActiveCount) {
|
|
return FALSE;
|
|
}
|
|
|
|
PTHREAD_STRUCT ThreadOwner;
|
|
|
|
|
|
if (Resource->Flag & ResourceOwnedExclusive || (Resource->OwnerThreads[1].OwnerCount == 1)) {
|
|
|
|
// If only one owner
|
|
|
|
// Find thread owning this resource
|
|
if (Resource->Flag & ResourceOwnedExclusive) {
|
|
ThreadOwner = DLDFindThread(Resource->OwnerThreads[0].OwnerThread);
|
|
} else {
|
|
ThreadOwner = DLDFindThread(Resource->OwnerThreads[1].OwnerThread);
|
|
}
|
|
|
|
BOOLEAN Result = FALSE;
|
|
if (ThreadOwner) {
|
|
Result = DLDProcessThread(ThreadOwner, ThrdStruct, Resource,RecLevel-1);
|
|
}
|
|
return Result;
|
|
} else {
|
|
// Many owners
|
|
int i;
|
|
for (i=0; i<Resource->OwnerThreads[0].TableSize; i++) {
|
|
if (Resource->OwnerTable[i].OwnerThread) {
|
|
|
|
ThreadOwner = DLDFindThread(Resource->OwnerTable[i].OwnerThread);
|
|
if (ThreadOwner && DLDProcessThread(ThreadOwner, ThrdStruct, Resource,RecLevel-1)) {
|
|
|
|
return TRUE;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
|
|
|
|
VOID DLDpWaitForResource(
|
|
IN PERESOURCE Resource,
|
|
IN DISPATCHER_HEADER *DispatcherObject,
|
|
IN PTHREAD_STRUCT ThrdStruct
|
|
) {
|
|
KIRQL oldIrql;
|
|
ULONG ResourceWaitCount = 0;
|
|
|
|
Resource->ContentionCount++;
|
|
|
|
while (KeWaitForSingleObject(DispatcherObject,Executive,KernelMode,FALSE,&DLDpTimeout) == STATUS_TIMEOUT) {
|
|
KeAcquireSpinLock(&Resource->SpinLock, &oldIrql);
|
|
if (++ResourceWaitCount>DLDpResourceTimeoutCount) {
|
|
// May be deadlock?
|
|
ResourceWaitCount = 0;
|
|
|
|
if (DLDProcessResource(Resource, ThrdStruct,DLD_MAX_REC_LEVEL)) {
|
|
UDFPrint((" which thread %x has tried to acquire at (BugCheckId:%x:Line:%d)\n",
|
|
ThrdStruct->ThreadId,
|
|
ThrdStruct->BugCheckId,
|
|
ThrdStruct->Line
|
|
));
|
|
BrutePoint();
|
|
}
|
|
}
|
|
// Priority boosts
|
|
// .....
|
|
// End of priority boosts
|
|
KeReleaseSpinLock(&Resource->SpinLock, oldIrql);
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
VOID DLDpAcquireResourceExclusiveLite(
|
|
IN PERESOURCE Resource,
|
|
IN ERESOURCE_THREAD Thread,
|
|
IN KIRQL oldIrql,
|
|
IN ULONG BugCheckId,
|
|
IN ULONG Line
|
|
) {
|
|
KIRQL oldIrql2;
|
|
|
|
if (!(Resource->ExclusiveWaiters)) {
|
|
|
|
KeReleaseSpinLock(&Resource->SpinLock, oldIrql);
|
|
KeAcquireSpinLock(&Resource->SpinLock, &oldIrql2);
|
|
|
|
// If ExclusiveWaiters Event not yet allocated allocate new one
|
|
if (!(Resource->ExclusiveWaiters)) {
|
|
Resource->ExclusiveWaiters = (PKEVENT)ExAllocatePoolWithTag(NonPagedPool, sizeof(KEVENT),RESOURCE_EVENT_TAG);
|
|
KeInitializeEvent(Resource->ExclusiveWaiters,SynchronizationEvent,FALSE);
|
|
}
|
|
KeReleaseSpinLock(&Resource->SpinLock, oldIrql2);
|
|
DLDAcquireExclusive(Resource,BugCheckId,Line);
|
|
|
|
} else {
|
|
Resource->NumberOfExclusiveWaiters++;
|
|
|
|
PTHREAD_STRUCT ThrdStruct = DLDAllocFindThread(Thread);
|
|
|
|
|
|
// Set WaitingResource for current thread
|
|
ThrdStruct->WaitingResource = Resource;
|
|
ThrdStruct->BugCheckId = BugCheckId;
|
|
ThrdStruct->Line = Line;
|
|
|
|
KeReleaseSpinLock(&Resource->SpinLock, oldIrql);
|
|
|
|
DLDpWaitForResource(Resource,&(Resource->ExclusiveWaiters->Header),ThrdStruct);
|
|
|
|
KeAcquireSpinLock(&Resource->SpinLock, &oldIrql);
|
|
|
|
ThrdStruct->WaitingResource = NULL;
|
|
ThrdStruct->ThreadId = 0;
|
|
ThrdStruct->BugCheckId = 0;
|
|
ThrdStruct->Line = 0;
|
|
Resource->OwnerThreads[0].OwnerThread = Thread;
|
|
|
|
KeReleaseSpinLock(&Resource->SpinLock, oldIrql);
|
|
}
|
|
}
|
|
|
|
|
|
|
|
|
|
VOID DLDAcquireExclusive(PERESOURCE Resource,
|
|
ULONG BugCheckId,
|
|
ULONG Line
|
|
) {
|
|
|
|
KIRQL oldIrql;
|
|
|
|
KeAcquireSpinLock(&Resource->SpinLock, &oldIrql);
|
|
|
|
ERESOURCE_THREAD Thread = (ERESOURCE_THREAD)PsGetCurrentThread();
|
|
|
|
if (!Resource->ActiveCount) goto SimpleAcquire;
|
|
if ((Resource->Flag & ResourceOwnedExclusive) && Resource->OwnerThreads[0].OwnerThread == Thread) {
|
|
Resource->OwnerThreads[0].OwnerCount++;
|
|
KeReleaseSpinLock(&Resource->SpinLock, oldIrql);
|
|
return;
|
|
}
|
|
|
|
DLDpAcquireResourceExclusiveLite(Resource, Thread, oldIrql,BugCheckId,Line);
|
|
return;
|
|
|
|
SimpleAcquire:
|
|
|
|
Resource->Flag |= ResourceOwnedExclusive;
|
|
Resource->ActiveCount = 1;
|
|
Resource->OwnerThreads[0].OwnerThread = Thread;
|
|
Resource->OwnerThreads[0].OwnerCount = 1;
|
|
|
|
KeReleaseSpinLock(&Resource->SpinLock, oldIrql);
|
|
}
|
|
|
|
|
|
POWNER_ENTRY DLDpFindCurrentThread(
|
|
IN PERESOURCE Resource,
|
|
IN ERESOURCE_THREAD Thread
|
|
) {
|
|
|
|
if (Resource->OwnerThreads[0].OwnerThread == Thread) return &(Resource->OwnerThreads[0]);
|
|
if (Resource->OwnerThreads[1].OwnerThread == Thread) return &(Resource->OwnerThreads[1]);
|
|
|
|
POWNER_ENTRY LastEntry, CurrentEntry, FirstEmptyEntry = NULL;
|
|
if (!(Resource->OwnerThreads[1].OwnerThread)) FirstEmptyEntry = &(Resource->OwnerThreads[1]);
|
|
|
|
CurrentEntry = Resource->OwnerTable;
|
|
LastEntry = &(Resource->OwnerTable[Resource->OwnerThreads[0].TableSize]);
|
|
|
|
while (CurrentEntry != LastEntry) {
|
|
if (CurrentEntry->OwnerThread == Thread) {
|
|
PCHAR CurrentThread = (PCHAR)PsGetCurrentThread();
|
|
*((PULONG)(CurrentThread + 0x136)) = CurrentEntry - Resource->OwnerTable;
|
|
return CurrentEntry;
|
|
}
|
|
if (!(CurrentEntry->OwnerThread)) {
|
|
FirstEmptyEntry = CurrentEntry;
|
|
}
|
|
CurrentEntry++;
|
|
}
|
|
if (FirstEmptyEntry) {
|
|
PCHAR CurrentThread = (PCHAR)PsGetCurrentThread();
|
|
*((PULONG)(CurrentThread + 0x136)) = FirstEmptyEntry - Resource->OwnerTable;
|
|
return FirstEmptyEntry;
|
|
} else {
|
|
// Grow OwnerTable
|
|
|
|
|
|
USHORT OldSize = Resource->OwnerThreads[0].TableSize;
|
|
USHORT NewSize = 3;
|
|
if (OldSize) NewSize = OldSize + 4;
|
|
POWNER_ENTRY NewEntry = (POWNER_ENTRY)ExAllocatePoolWithTag(NonPagedPool, sizeof(OWNER_ENTRY)*NewSize,RESOURCE_TABLE_TAG);
|
|
RtlZeroMemory(NewEntry,sizeof(OWNER_ENTRY)*NewSize);
|
|
if (Resource->OwnerTable) {
|
|
RtlMoveMemory(NewEntry,Resource->OwnerTable,sizeof(OWNER_ENTRY)*OldSize);
|
|
ExFreePool(Resource->OwnerTable);
|
|
}
|
|
Resource->OwnerTable = NewEntry;
|
|
|
|
PCHAR CurrentThread = (PCHAR)PsGetCurrentThread();
|
|
*((PULONG)(CurrentThread + 0x136)) = OldSize;
|
|
Resource->OwnerThreads[0].TableSize = NewSize;
|
|
|
|
return &(NewEntry[OldSize]);
|
|
}
|
|
}
|
|
|
|
|
|
VOID DLDAcquireShared(PERESOURCE Resource,
|
|
ULONG BugCheckId,
|
|
ULONG Line,
|
|
BOOLEAN WaitForExclusive)
|
|
{
|
|
|
|
KIRQL oldIrql;
|
|
|
|
ERESOURCE_THREAD Thread = (ERESOURCE_THREAD)PsGetCurrentThread();
|
|
POWNER_ENTRY pOwnerEntry;
|
|
|
|
KeAcquireSpinLock(&Resource->SpinLock, &oldIrql);
|
|
|
|
if (!Resource->ActiveCount) {
|
|
Resource->Flag &= ~ResourceOwnedExclusive;
|
|
Resource->ActiveCount = 1;
|
|
Resource->OwnerThreads[1].OwnerThread = Thread;
|
|
Resource->OwnerThreads[1].OwnerCount = 1;
|
|
KeReleaseSpinLock(&Resource->SpinLock, oldIrql);
|
|
return;
|
|
}
|
|
|
|
if (Resource->Flag & ResourceOwnedExclusive ) {
|
|
if (Resource->OwnerThreads[0].OwnerThread == Thread) {
|
|
Resource->OwnerThreads[0].OwnerCount++;
|
|
KeReleaseSpinLock(&Resource->SpinLock, oldIrql);
|
|
return;
|
|
}
|
|
|
|
pOwnerEntry = DLDpFindCurrentThread(Resource, 0);
|
|
|
|
} else {
|
|
// owned shared by some thread(s)
|
|
|
|
pOwnerEntry = DLDpFindCurrentThread(Resource, Thread);
|
|
|
|
if (!WaitForExclusive && pOwnerEntry->OwnerThread == Thread) {
|
|
pOwnerEntry->OwnerCount++;
|
|
KeReleaseSpinLock(&Resource->SpinLock, oldIrql);
|
|
return;
|
|
}
|
|
|
|
if (!(Resource->NumberOfExclusiveWaiters)) {
|
|
|
|
pOwnerEntry->OwnerThread = Thread;
|
|
pOwnerEntry->OwnerCount = 1;
|
|
Resource->ActiveCount++;
|
|
KeReleaseSpinLock(&Resource->SpinLock, oldIrql);
|
|
|
|
return;
|
|
}
|
|
}
|
|
|
|
if (!(Resource->SharedWaiters)) {
|
|
Resource->SharedWaiters = (PKSEMAPHORE)ExAllocatePoolWithTag(NonPagedPool, sizeof(KSEMAPHORE),RESOURCE_SEMAFORE_TAG);
|
|
KeInitializeSemaphore(Resource->SharedWaiters,0,0x7fffffff);
|
|
}
|
|
|
|
Resource->NumberOfSharedWaiters++;
|
|
|
|
PTHREAD_STRUCT ThrdStruct = DLDAllocFindThread(Thread);
|
|
|
|
|
|
// Set WaitingResource for current thread
|
|
ThrdStruct->WaitingResource = Resource;
|
|
ThrdStruct->BugCheckId = BugCheckId;
|
|
ThrdStruct->Line = Line;
|
|
|
|
KeReleaseSpinLock(&Resource->SpinLock, oldIrql);
|
|
|
|
DLDpWaitForResource(Resource,&(Resource->SharedWaiters->Header),ThrdStruct);
|
|
|
|
KeAcquireSpinLock(&Resource->SpinLock, &oldIrql);
|
|
|
|
pOwnerEntry = DLDpFindCurrentThread(Resource, Thread);
|
|
pOwnerEntry->OwnerThread = Thread;
|
|
pOwnerEntry->OwnerCount = 1;
|
|
|
|
ThrdStruct->WaitingResource = NULL;
|
|
ThrdStruct->ThreadId = 0;
|
|
ThrdStruct->BugCheckId = 0;
|
|
ThrdStruct->Line = 0;
|
|
|
|
KeReleaseSpinLock(&Resource->SpinLock, oldIrql);
|
|
|
|
return;
|
|
|
|
}
|