author Sam Lantinga <>
Thu, 16 May 2013 00:43:22 -0700
changeset 7180 3733e68edbc3
parent 6571 bbf4d53d9e37
permissions -rw-r--r--
Fixed bug 1846 - _allmul implementation in SDL_stdlib.c doesn't clean up the stack

Colin Barrett

I see this manifest itself (VS2012 x86) as:

"Run-Time Check Failure #0 - The value of ESP was not properly saved across a function call. This is usually a result of calling a function declared with one calling convention with a function pointer declared with a different calling convention."

in the first call to SDL_GetTicks in my application. The disassembly at the problem line is:

hires_now.QuadPart *= 1000;
00AD0792 push 0
00AD0794 push 3E8h
00AD0799 mov eax,dword ptr [ebp-10h]
00AD079C push eax
00AD079D mov ecx,dword ptr [hires_now]
00AD07A0 push ecx
00AD07A1 call _allmul (0AE7D40h)
00AD07A6 mov dword ptr [hires_now],eax
00AD07A9 mov dword ptr [ebp-10h],edx

Apparently _allmul should be popping the stack but isn't (other similar functions in SDL_stdlib.c - _alldiv and whatnot - DO pop the stack).

A 'ret 10h' at the end of _allmul appears to do the trick
     1 2.0 release checklist:
     2  *
     4  * See why windows are being rearranged.  Is the shield window not up?
     5  * Make sure you can create and show a fullscreen window in one step
     6  * Write automated test case for multi-draw APIs
     7  * Implement assertion code on iPhone
     8  * Add __WINDOWS__ in addition to __WIN32__
     9  * Write test for fullscreen gamma to check X11 colormap handling
    11  * Check 1.2 revisions:
    12 	3554 - Need to resolve semantics for locking keys on different platforms
    13 	4874 - Do we want screen rotation?  At what level?
    14 	4974 - Windows file code needs to convert UTF-8 to Unicode, but we don't need to tap dance for Windows 95/98
    15 	4484, 4485 - Verify that SDL's Windows keyboard handling works correctly
    16 	4865 - See if this is still needed (mouse coordinate clamping)
    17 	4866 - See if this is still needed (blocking window repositioning)