[fpc-devel] Lazarus Apache module crashes during concurrent requests

[ABorka]

OK, after 4 days of pulling my (remaining) hair out I was able to 
compile a basic C apache module on Ubuntu 8.04 (apache 2.2.8).

It seems both fpc/lazarus (not working apache module) and the C compiled 
(working apache module) one shows

sizeof(request_rec) =  412
sizeof(module_struct) = 56

So the length seems to be the same for for both. Still, the Lazarus 
compiled apache module doesn't even load in apache (mod_hello.pp or any 
of the other examples included in fpc).
If the exports is included then it loads but doesn't work at all:

modified "mod_hello.pp" from fpc/packages/httpd22/examples/
{*******************************************************************
*  Test library of the Apache Pascal Headers
*******************************************************************}
library mod_hello;

{*******************************************************************
*  The mode must be objfpc on this unit because the unix code uses
* some extensions introduced on Free Pascal
*******************************************************************}
{$ifdef fpc}
   {$mode objfpc}{$H+}
{$endif}

{$IFDEF WIN32}
   {$DEFINE WINDOWS}
{$ENDIF}

{$define Apache2_2}

uses SysUtils, httpd {$ifndef Apache1_3}, apr{$endif};

var
  test_module: module; public name 'test_module';
  default_module_ptr: Pmodule;

const
   MODULE_NAME = 'mod_hello.so';

{*******************************************************************
*  Free Pascal only supports exporting variables on Windows
*******************************************************************}
{ $ifdef WINDOWS}//commented out, exports work in Linux now
exports
  test_module name 'test_module';
{ $endif}//commented out, exports work in Linux now
.
.snip
.


Not sure why the Lazarus/fpc apache modules do not work on apache 2.2.8 
or 2.2.9 on Ubuntu.
The above module is loaded, the handler registering function is called, 
but the handler never gets triggered when the module is called from a 
browser.


Michael Van Canneyt wrote:
>>
>> Any suggestions?
> 
> Yes: please print the size of the Request_rec (or TRequest_Rec) and the
> same record in C. Compare if they are equal. Same for the module record.
> If they are not equal, then we know it is a problem with the pascal 
> definition of this record. I've had to do this exercise about 30 times 
> myself on various platforms to get it right. Maybe they changed the 
> size again.
> 
> Michael.
> _______________________________________________
> fpc-devel maillist  -  fpc-devel at lists.freepascal.org
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>