[Issue 7251] New: GC not working

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=7251

           Summary: GC not working
           Product: D
           Version: D2
          Platform: x86
        OS/Version: Windows
            Status: NEW
          Severity: regression
          Priority: P2
         Component: druntime
        AssignedTo: nobody at puremagic.com
        ReportedBy: wfunction at hotmail.com


--- Comment #0 from wfunction at hotmail.com 2012-01-08 23:40:33 PST ---
On DMD 2.057, the code:


import core.memory, std.stdio;
extern(Windows) int GlobalMemoryStatusEx(ref MEMORYSTATUSEX lpBuffer);
struct MEMORYSTATUSEX
{
    uint Length, MemoryLoad;
    ulong TotalPhys, AvailPhys, TotalPageFile, AvailPageFile;
    ulong TotalVirtual, AvailVirtual, AvailExtendedVirtual;
}
void testA(size_t count)
{
    size_t[] a;
    foreach (i; 0 .. count)
        a ~= i;
}
void main()
{
    MEMORYSTATUSEX ms;
    ms.Length = ms.sizeof;
    foreach (i; 0 .. 32)
    {
        testA(16 << 20);
        GlobalMemoryStatusEx(ms);
        stderr.writefln("AvailPhys: %s MiB", ms.AvailPhys >>> 20);
    }
}



Gives output:

AvailPhys: 3711 MiB
AvailPhys: 3365 MiB
AvailPhys: 3061 MiB
AvailPhys: 2747 MiB
AvailPhys: 2458 MiB
core.exception.OutOfMemoryError

Obviously, the GC is non-functional...

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