[Bug 30860] New: HeapValidate() reports incorrect results when running under Valgrind

http://bugs.winehq.org/show_bug.cgi?id=30860

             Bug #: 30860
           Summary: HeapValidate() reports incorrect results when running
                    under Valgrind
           Product: Wine
           Version: 1.5.5
          Platform: x86
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: ntdll
        AssignedTo: wine-bugs(a)winehq.org
        ReportedBy: dank(a)kegel.com
    Classification: Unclassified


When run under Valgrind, the program

#include <windows.h>
#include <assert.h>
int WINAPI WinMain(HINSTANCE hinst, HINSTANCE hinstPrev,
                   LPSTR lpCmdLine, int nShowCmd)
{
    assert(HeapValidate(GetProcessHeap(), 0, 0));
}

fails the assertion, and the log shows

err:heap:HEAP_ValidateInUseArena Heap 0x7f000000: free block 0x7f000138
overwritten at 0x7f000138 by 0074006e

I think heap_set_debug_flags(), HEAP_ValidateInUseArena(), and probably others
would need changes for this to work.

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