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ThreadProvider.c
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ThreadProvider.c
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#include <WindowsInspector.Kernel/Debug.h>
#include <WindowsInspector.Kernel/KernelApi.h>
#include <WindowsInspector.Shared/Common.h>
#include <WindowsInspector.Kernel/EventBuffer.h>
#include "ThreadProvider.h"
#include "Providers.h"
VOID
OnThreadNotify(
__in HANDLE ProcessId,
__in HANDLE ThreadId,
__in BOOLEAN Create
);
NTSTATUS
InitializeThreadProvider(
VOID
)
{
return PsSetCreateThreadNotifyRoutine(OnThreadNotify);
}
VOID
ReleaseThreadProvider(
VOID
)
{
PsRemoveCreateThreadNotifyRoutine(OnThreadNotify);
}
NTSTATUS
GetThreadWin32StartAddress(
__in ULONG ThreadId,
__out PULONG_PTR Win32StartAddress
)
{
NTSTATUS Status;
HANDLE CreatingThreadObjectHandle = NULL;
PETHREAD Thread = NULL;
Status = PsLookupThreadByThreadId(UlongToHandle(ThreadId), &Thread);
if (!NT_SUCCESS(Status))
{
D_ERROR_STATUS_ARGS("Failed to find thread with id %d", Status, ThreadId);
goto cleanup;
}
Status = ObOpenObjectByPointer(
PsGetCurrentThread(),
OBJ_KERNEL_HANDLE,
NULL,
THREAD_QUERY_INFORMATION,
*PsThreadType,
KernelMode,
&CreatingThreadObjectHandle
);
ObDereferenceObject(Thread);
if (!NT_SUCCESS(Status))
{
D_ERROR_STATUS("Failed to create a handle to the new thread", Status);
goto cleanup;
}
Status = ZwQueryInformationThread(
CreatingThreadObjectHandle,
ThreadQuerySetWin32StartAddress,
Win32StartAddress,
sizeof(ULONG_PTR),
NULL
);
if (!NT_SUCCESS(Status))
{
D_ERROR_STATUS_ARGS("Cannot query thread start address %d", Status, ThreadId);
goto cleanup;
}
cleanup:
if (CreatingThreadObjectHandle)
{
ObCloseHandle(CreatingThreadObjectHandle, KernelMode);
}
return Status;
}
VOID
OnThreadCreate(
__in ULONG TargetProcessId,
__in ULONG TargetThreadId
)
{
ULONG_PTR StartAddress;
PTHREAD_CREATE_EVENT Event;
NTSTATUS Status;
Status = GetThreadWin32StartAddress(TargetThreadId, &StartAddress);
if (!NT_SUCCESS(Status))
{
D_ERROR_STATUS_ARGS("Could not find thread start address %d", Status, TargetThreadId);
return;
}
Status = AllocateBufferEvent(&Event, sizeof(THREAD_CREATE_EVENT));
if (!NT_SUCCESS(Status))
{
D_ERROR_STATUS("Could not allocate ThreadCreateEvent", Status);
return;
}
Event->Header.Type = EvtTypeThreadCreate;
KeQuerySystemTimePrecise(&Event->Header.Time);
Event->Header.ProcessId = HandleToUlong(PsGetCurrentProcessId());
Event->Header.ThreadId = HandleToUlong(PsGetCurrentThreadId());
Event->NewThreadId = TargetThreadId;
Event->TargetProcessId = TargetProcessId;
Event->StartAddress = StartAddress;
SendOrCancelBufferEvent(Event);
}
VOID
OnThreadExit(
__in ULONG ProcessId,
__in ULONG ThreadId
)
{
PTHREAD_EXIT_EVENT Event;
NTSTATUS Status;
Status = AllocateBufferEvent(&Event, sizeof(THREAD_EXIT_EVENT));
if (!NT_SUCCESS(Status))
{
D_ERROR_STATUS("Could not allocate ThreadExitEvent", Status);
return;
}
Event->Header.Type = EvtTypeThreadExit;
KeQuerySystemTimePrecise(&Event->Header.Time);
Event->Header.ThreadId = ThreadId;
Event->Header.ProcessId = ProcessId;
SendOrCancelBufferEvent(Event);
}
VOID
OnThreadNotify(
__in HANDLE ProcessId,
__in HANDLE ThreadId,
__in BOOLEAN Create
)
{
if (!g_Listening)
{
return;
}
if (Create)
{
OnThreadCreate(HandleToUlong(ProcessId), HandleToUlong(ThreadId));
}
else
{
OnThreadExit(HandleToUlong(ProcessId), HandleToUlong(ThreadId));
}
}