[SOLVED] FPC 3.2.2/4 problem with the old memory manager (or my code
💁‍♂️)
lazarus / 64-FPC development

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ALLIGATOR · 2025-11-27 05:29

FPC 3.2.2 & 3.2.4 x64 Windows

Code: Pascal  [Select][+][-]window.onload = function(){var x1 =
document.getElementById("main_content_section"); if (x1) { var x =
document.getElementsByClassName("geshi");for (var i = 0; i program
app;begin  for argc:=9 to 9 do    GetMem(1);end.
Code: Pascal  [Select][+][-]window.onload = function(){var x1 =
document.getElementById("main_content_section"); if (x1) { var x =
document.getElementsByClassName("geshi");for (var i = 0; i Access
violation reading from address $FFFFFFFFFFFFFFFF

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H₂SO₄ · 2025-11-27 05:58

I don't know what else you'd expect to happen when carelessly
manipulating the argument count like that 

Take a look at  InternalExit  in  system.inc,  called on program
shutdown:

Code: Pascal  [Select][+][-]window.onload = function(){var x1 =
document.getElementById("main_content_section"); if (x1) { var x =
document.getElementsByClassName("geshi");for (var i = 0; i {$if
(defined(MSWINDOWS) and not defined(win16)) or defined(OS2)}  {
finally release the heap if possible, especially    important for
DLLs.    Reset the array to nil, and finally also argv itself to   
avoid double freeing problem in case this function gets called twice.
}  if assigned(argv) then    begin      for i:=0 to argc-1 do       
if assigned(argv[i]) then          begin           
sysfreemem(argv[i]);            argv[i]:=nil;          end;     
sysfreemem(argv);      argv:=nil;    end;{$endif}

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ALLIGATOR · 2025-11-27 06:38

Well, well!

In my defense, I will say that I don't have debug symbols for version
3.2.2/3.2.4, so I couldn't diagnose it properly. And on FPC [main],
the behavior did not repeat itself.

Thank you)