drivers/base/kdgdb/utils.c

   1 /*
   2  * COPYRIGHT:       GPL, see COPYING in the top level directory
   3  * PROJECT:         ReactOS kernel
   4  * FILE:            drivers/base/kddll/utils.c
   5  * PURPOSE:         Misc helper functions.
   6  */
   7
   8 #include "kdgdb.h"
   9
  10 /*
  11  * We cannot use PsLookupProcessThreadByCid or alike as we could be running at any IRQL.
  12  * So we have to loop over the process list.
  13  */
  14
  15 PEPROCESS
  16 find_process(
  17     _In_ UINT_PTR Pid)
  18 {
  19     HANDLE ProcessId = gdb_pid_to_handle(Pid);
  20     LIST_ENTRY* ProcessEntry;
  21     PEPROCESS Process;
  22
  23     /* Special case for idle process */
  24     if (Pid == 1)
  25         return TheIdleProcess;
  26
  27     for (ProcessEntry = ProcessListHead->Flink;
  28             ProcessEntry != ProcessListHead;
  29             ProcessEntry = ProcessEntry->Flink)
  30     {
  31         Process = CONTAINING_RECORD(ProcessEntry, EPROCESS, ActiveProcessLinks);
  32
  33         if (Process->UniqueProcessId == ProcessId)
  34             return Process;
  35     }
  36
  37     return NULL;
  38 }
  39
  40 PETHREAD
  41 find_thread(
  42     _In_ UINT_PTR Pid,
  43     _In_ UINT_PTR Tid)
  44 {
  45     HANDLE ThreadId = gdb_tid_to_handle(Tid);
  46     PETHREAD Thread;
  47     PEPROCESS Process;
  48     LIST_ENTRY* ThreadEntry;
  49
  50     /* Special case for the idle thread */
  51     if ((Pid == 1) && (Tid == 1))
  52         return TheIdleThread;
  53
  54     Process = find_process(Pid);
  55     if (!Process)
  56         return NULL;
  57
  58     for (ThreadEntry = Process->ThreadListHead.Flink;
  59             ThreadEntry != &Process->ThreadListHead;
  60             ThreadEntry = ThreadEntry->Flink)
  61     {
  62         Thread = CONTAINING_RECORD(ThreadEntry, ETHREAD, ThreadListEntry);
  63         /* For GDB, Tid == 0 means any thread */
  64         if ((Thread->Cid.UniqueThread == ThreadId) || (Tid == 0))
  65         {
  66             return Thread;
  67         }
  68     }
  69
  70     return NULL;
  71 }