D - Bug : GC can't allocate a large buffer
- yaneurao sun-inet.or.jp (19/19) Jan 05 2004 In Win9x , GC can't allocate large buffers like this.
- yaneurao sun-inet.or.jp (6/8) Jan 05 2004 I've got to the back of it.
In Win9x , GC can't allocate large buffers like this.
byte [] v = new byte[4096*256];
GC can't allocate this. Somebody said something is wrong with GC,
but I don't think so.
When allocPage is failed , fullcollect would be called.
GetThreadContext in fullcollect returns FALSE.
and make an assert failure.
: Thread t = threads[n] ;
: if( !GetThreadContext( t.hdl, &context ) ){
: assert(0) ; // here
: }
Obviously t.hdl is the duplicated handle made by calling
getCurrentThreadHandle() from Thread.this() in std.thread.
But getCurrentThreadHandle can't duplicate this.
After DuplicateHandle is called, GetLastError says 'invalid handle' in Win9x.
(Now I can't guess why it is..)
That's all why GC can't allocate and GC looks to have a failure.
It is a very serious problem , I think. Fix required.
yaneurao.
Jan 05 2004
In article <btcaa0$a6f$1 digitaldaemon.com>, yaneurao sun-inet.or.jp says...In Win9x , GC can't allocate large buffers like this.I've got to the back of it. getCurrentThreadHandle in std.thread ,thread_hdl currentProcess = cast(thread_hdl)-1 ; // here has a problem< thread_hdl currentProcess = GetCurrentProcess() ; I don't know what 'cast(thread_hdl)-1' means... yaneurao.
Jan 05 2004
<yaneurao sun-inet.or.jp> wrote in message news:btdpq3$2i0a$1 digitaldaemon.com...In article <btcaa0$a6f$1 digitaldaemon.com>, yaneurao sun-inet.or.jpsays...Perhaps it would make more sense if written: cast(thread_hdl)(-1)In Win9x , GC can't allocate large buffers like this.I've got to the back of it. getCurrentThreadHandle in std.thread ,thread_hdl currentProcess = cast(thread_hdl)-1 ; // here has a problem< thread_hdl currentProcess = GetCurrentProcess() ; I don't know what 'cast(thread_hdl)-1' means...
Jan 22 2004
yaneurao <yaneurao_member pathlink.com> In article <bup47g$2o3v$2 digitaldaemon.com>, Walter says...I couldn't understand it for a moment , since MSDN in Japanese doesn't say anything about it. after , I found the following description MSDN in English. : A pseudo handle is a special constant, currently (HANDLE)-1, that is interpreted as the current process handle. For compatibility with future operating systems, it is best to call GetCurrentProcess instead of hard-coding this constant value. it is just what I want to say! (HANDLE)-1 should not be used. in Win9x at least Japanese Edition , it is fact that calling DuplicateHandle with currentProcessHandle being -1 will fail. and that's why GC in D can't allocate a large buffer in Win9x. yaneurao.Perhaps it would make more sense if written: cast(thread_hdl)(-1)In Win9x , GC can't allocate large buffers like this. thread_hdl currentProcess = cast(thread_hdl)-1 ; // here has a problem< thread_hdl currentProcess = GetCurrentProcess() ; I don't know what 'cast(thread_hdl)-1' means...
Jan 22 2004