[fpc-devel] HEAP Memory Manager BUG

Peter Vreman peter at freepascal.org
Sat Jul 16 22:18:24 CEST 2005

At 23:15 15-7-2005, you wrote:
>We are trying to port a Project around 220.000 Lines of code from
>Delphi/Kylix to FPC. Primary it runs :-), our main problems were Variant
>Support (Various conversions behaving not as in Delphi/Kylix). We made an
>own Variant Manager (to not break the existing one ) which is closer to
>Delphi, we would like to contribute if we are done with it.
>The biggest problem still not solved is a BUG in the heap memory manager
>wich causes various SIGSEGV in various pieces of code i reported it
>yesterday as BUG 4189. (http://www.freepascal.org/bugs/showrec.php3?ID=4189)
>I want to supply additional info:
>Program test;
>var s:string;
>  setlength(s,3);
>  setlength(s,655360); -> CRASHES WITH SIGSEGV
>  writeln('OK');
>Compile with: fpc -Sdh test.pas
>Program crashes under linux and win32 with current SVN 2.1.1
>Problem seems to be in:
>function SysTryResizeMem(var p: pointer; size: ptrint): boolean;
>We "FIXED" it by changing function to:



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