如果线程已被 SuspendThread() 挂起，我如何获取信息。没有提供此信息的 API。 toolhelp 快照 API 非常有限。 互联网和 StackOverflow 上有很多误导性信息。 StackOverflow 上的一些人甚至说这是不可能的。

其他人发布了需要 Windows 7 的解决方案。但我需要代码才能在 XP 上运行。

最佳答案

我自己找到了答案。 我编写了一个类 cProcInfo 来获取大量关于进程和线程的信息，例如:

1. 进程和线程标识符
2. 进程父标识符
3. 进程名称
4. 优先级
5. 上下文切换
6. 地址
7. 状态(运行、等待、暂停等)
8. 进程和线程启动的日期和时间
9. 在内核模式下花费的时间
10. 在用户模式下花费的时间
11. 内存使用情况
12. 处理次数
13. 页面错误

我的类(class)适用于 Windows 2000、XP、Vista、7、8...

下面的代码展示了如何判断进程1948中的线程640是否被挂起:

Main()
{
    cProcInfo i_Proc;
    DWORD u32_Error = i_Proc.Capture();
    if (u32_Error)
    {
        printf("Error 0x%X capturing processes.\n", u32_Error);
        return 0;
    }

    SYSTEM_PROCESS* pk_Proc = i_Proc.FindProcessByPid(1948);
    if (!pk_Proc)
    {
        printf("The process does not exist.\n");
        return 0;
    }

    SYSTEM_THREAD* pk_Thread = i_Proc.FindThreadByTid(pk_Proc, 640);
    if (!pk_Thread)
    {
        printf("The thread does not exist.\n");
        return 0;
    }

    BOOL b_Suspend;
    i_Proc.IsThreadSuspended(pk_Thread, &b_Suspend);

    if (b_Suspend) printf("The thread is suspended.\n");
    else           printf("The thread is not suspended.\n");
    return 0;
}

我的类首先使用NtQuerySystemInformation() 捕获所有当前正在运行的进程和线程，然后搜索所请求线程的信息。

您可以轻松添加按名称搜索进程的功能。 (pk_Proc->usName)

我的课来了。它只有一个头文件:

#pragma once

#include <winternl.h>
#include <winnt.h>

typedef LONG NTSTATUS;

#define STATUS_SUCCESS              ((NTSTATUS) 0x00000000)
#define STATUS_INFO_LENGTH_MISMATCH ((NTSTATUS) 0xC0000004)

enum KWAIT_REASON
{
    Executive,
    FreePage,
    PageIn,
    PoolAllocation,
    DelayExecution,
    Suspended,
    UserRequest,
    WrExecutive,
    WrFreePage,
    WrPageIn,
    WrPoolAllocation,
    WrDelayExecution,
    WrSuspended,
    WrUserRequest,
    WrEventPair,
    WrQueue,
    WrLpcReceive,
    WrLpcReply,
    WrVirtualMemory,
    WrPageOut,
    WrRendezvous,
    Spare2,
    Spare3,
    Spare4,
    Spare5,
    Spare6,
    WrKernel,
    MaximumWaitReason
};

enum THREAD_STATE
{
    Running = 2,
    Waiting = 5,
};

#pragma pack(push,8)

struct CLIENT_ID
{
    HANDLE UniqueProcess; // Process ID
    HANDLE UniqueThread;  // Thread ID
};

// http://www.geoffchappell.com/studies/windows/km/ntoskrnl/api/ex/sysinfo/thread.htm
// Size = 0x40 for Win32
// Size = 0x50 for Win64
struct SYSTEM_THREAD
{
    LARGE_INTEGER KernelTime;
    LARGE_INTEGER UserTime;  
    LARGE_INTEGER CreateTime;
    ULONG         WaitTime;
    PVOID         StartAddress;
    CLIENT_ID     ClientID;           // process/thread ids
    LONG          Priority;
    LONG          BasePriority;
    ULONG         ContextSwitches;
    THREAD_STATE  ThreadState;
    KWAIT_REASON  WaitReason;
};

struct VM_COUNTERS // virtual memory of process
{
    ULONG_PTR PeakVirtualSize;
    ULONG_PTR VirtualSize;
    ULONG     PageFaultCount;
    ULONG_PTR PeakWorkingSetSize;
    ULONG_PTR WorkingSetSize;
    ULONG_PTR QuotaPeakPagedPoolUsage;
    ULONG_PTR QuotaPagedPoolUsage;
    ULONG_PTR QuotaPeakNonPagedPoolUsage;
    ULONG_PTR QuotaNonPagedPoolUsage;
    ULONG_PTR PagefileUsage;
    ULONG_PTR PeakPagefileUsage;
};

// http://www.geoffchappell.com/studies/windows/km/ntoskrnl/api/ex/sysinfo/process.htm
// See also SYSTEM_PROCESS_INROMATION in Winternl.h
// Size = 0x00B8 for Win32
// Size = 0x0100 for Win64
struct SYSTEM_PROCESS
{
    ULONG          NextEntryOffset; // relative offset
    ULONG          ThreadCount;
    LARGE_INTEGER  WorkingSetPrivateSize;
    ULONG          HardFaultCount;
    ULONG          NumberOfThreadsHighWatermark;
    ULONGLONG      CycleTime;
    LARGE_INTEGER  CreateTime;
    LARGE_INTEGER  UserTime;  
    LARGE_INTEGER  KernelTime;
    UNICODE_STRING ImageName;
    LONG           BasePriority;
    PVOID          UniqueProcessId;
    PVOID          InheritedFromUniqueProcessId;
    ULONG          HandleCount;
    ULONG          SessionId;
    ULONG_PTR      UniqueProcessKey;
    VM_COUNTERS    VmCounters;
    ULONG_PTR      PrivatePageCount;
    IO_COUNTERS    IoCounters;   // defined in winnt.h
};

#pragma pack(pop)

typedef NTSTATUS (WINAPI* t_NtQueryInfo)(SYSTEM_INFORMATION_CLASS, PVOID, ULONG, PULONG);

class cProcInfo
{
public:
    cProcInfo()
    {
        #ifdef WIN64
            assert(sizeof(SYSTEM_THREAD) == 0x50 && sizeof(SYSTEM_PROCESS) == 0x100);
        #else
            assert(sizeof(SYSTEM_THREAD) == 0x40 && sizeof(SYSTEM_PROCESS) == 0xB8);
        #endif

        mu32_DataSize  = 1000;
        mp_Data        = NULL;
        mf_NtQueryInfo = NULL;
    }
    virtual ~cProcInfo()
    {
        if (mp_Data) LocalFree(mp_Data);
    }

    // Capture all running processes and all their threads.
    // returns an API or NTSTATUS Error code or zero if successfull
    DWORD Capture()
    {
        if (!mf_NtQueryInfo)
        {
            mf_NtQueryInfo = (t_NtQueryInfo)GetProcAddress(GetModuleHandleA("NtDll.dll"), "NtQuerySystemInformation");
            if (!mf_NtQueryInfo)
                return GetLastError();
        }

        // This must run in a loop because in the mean time a new process may have started 
        // and we need more buffer than u32_Needed !!
        while (true)
        {
            if (!mp_Data) 
            {
                mp_Data = (BYTE*)LocalAlloc(LMEM_FIXED, mu32_DataSize);
                if (!mp_Data)
                    return GetLastError();
            }

            ULONG u32_Needed = 0;
            NTSTATUS s32_Status = mf_NtQueryInfo(SystemProcessInformation, mp_Data, mu32_DataSize, &u32_Needed);

            if (s32_Status == STATUS_INFO_LENGTH_MISMATCH) // The buffer was too small
            {
                mu32_DataSize = u32_Needed + 4000;
                LocalFree(mp_Data);
                mp_Data = NULL;
                continue;
            }
            return s32_Status;
        }
    }

    // Searches a process by a given Process Identifier
    // Capture() must have been called before!
    SYSTEM_PROCESS* FindProcessByPid(DWORD u32_PID)
    {
        if (!mp_Data)
        {
            assert(mp_Data);
            return NULL;
        }

        SYSTEM_PROCESS* pk_Proc = (SYSTEM_PROCESS*)mp_Data;
        while (TRUE)
        {
            if ((DWORD)(DWORD_PTR)pk_Proc->UniqueProcessId == u32_PID)
                return pk_Proc;

            if (!pk_Proc->NextEntryOffset)
                return NULL;

            pk_Proc = (SYSTEM_PROCESS*)((BYTE*)pk_Proc + pk_Proc->NextEntryOffset);
        }
    }

    SYSTEM_THREAD* FindThreadByTid(SYSTEM_PROCESS* pk_Proc, DWORD u32_TID)
    {
        if (!pk_Proc)
        {
            assert(pk_Proc);
            return NULL;
        }

        // The first SYSTEM_THREAD structure comes immediately after the SYSTEM_PROCESS structure
        SYSTEM_THREAD* pk_Thread = (SYSTEM_THREAD*)((BYTE*)pk_Proc + sizeof(SYSTEM_PROCESS));

        for (DWORD i=0; i<pk_Proc->ThreadCount; i++)
        {
            if (pk_Thread->ClientID.UniqueThread == (HANDLE)(DWORD_PTR)u32_TID)
                return pk_Thread;

            pk_Thread++;
        }
        return NULL;
    }

    DWORD IsThreadSuspended(SYSTEM_THREAD* pk_Thread, BOOL* pb_Suspended)
    {
        if (!pk_Thread)
            return ERROR_INVALID_PARAMETER;

        *pb_Suspended = (pk_Thread->ThreadState == Waiting &&
                         pk_Thread->WaitReason  == Suspended);
        return 0;
    }

private:
    BYTE*         mp_Data;
    DWORD       mu32_DataSize;
    t_NtQueryInfo mf_NtQueryInfo;
};

// Based on the 32 bit code of Sven B. Schreiber on:
// http://www.informit.com/articles/article.aspx?p=22442&seqNum=5

关于c++ - 如何获取线程状态(例如挂起)、内存+CPU使用率、启动时间、优先级等，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/22949725/