dlls/user/hook.c HOOK_CallHooks() help

[Phil Lodwick]

Hi,

I have an application that is hitting the assert in HOOK_CallHooks.

------
trace:hook:HOOK_CallHooks calling hook in thread 0113 WH_CALLWNDPROC code 0
wp 0 lp 7fbef984
err:hook:HOOK_CallHooks Unknown hook id 4
wine-pthread: hook.c:381: HOOK_CallHooks: Assertion `0' failed.
------

Basically I have a call stack that looks like this:

4 0x7f886b31 HOOK_CallHooks+0x251(id=0x4, code=0x0, wparam=0x0,
lparam=0x7fbef984, unicode=0x0) [dlls/user/hook.c:381] in user32 (0x7fbef944)
  
5 0x7f8a4e8c call_window_proc+0x9c(hwnd=0x0, msg=0x0, wparam=0x0, lparam=0x0,
unicode=0x0, same_thread=0x0) [dlls/user/message.c:1512] in user32
(0x7fbef9a0)

6 0x7f8a5dca peek_message(msg=0x7fbefcd0, hwnd=0x0, first=0x0,
last=0xffffffff, flags=0x1) [dlls/user/message.c:2053] in user32 (0x7fbefca8)

7 0x7f8a7a16 PeekMessageW(msg_out=0x7fbefe10, hwnd=0x0, first=0x0, last=0x0,
flags=0x1) [dlls/user/message.c:2694] in user32 (0x7fbefcfc)
 
8 0x7f8a7cc9 GetMessageW+0x109(msg=0x7fbefe10, hwnd=0x0, first=0x0, last=0x0)
[dlls/user/message.c:2764] in user32 (0x7fbefdb0)

9 0x7f8a7e67 GetMessageA+0x37(msg=0x7fbefe10, hwnd=0x0, first=0x0, last=0x0)
[dlls/user/message.c:2804] in user32 (0x7fbefdd0)

-------------------

The WH_CALLWNDPROC is usually filtered out by the HOOK_IsHooked() call, but
not in this case.  I don't have source code available for the application.  I
was hoping somebody might have a good suggestion for the next step in
debugging this problem.  Right now I am going to start looking at GetMessageA
and follow that code down to call_window_proc and see if I see something
obvious.

Thanks,
Phil