Runtime error when include cthreads lib
lazarus / 32-Linux

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guiwunsch · 2021-07-25 23:23

Hi.
I'm trying to code a multithread application in Lazarus, but I've
noticed that when I include the "cthreads" lib (always the first line
of my project.lpr file), on some Linux distros, I get a runtime error
when running the application. I believe it's some broken library.
However, I don't know how to identify it. Could you help me?

project1.lpr:
Code: [Select]program project1;

uses
  cthreads,
  cmem;

begin
  writeln('test');
end.
error:
Code: [Select][root@dockerinaja /]# ./project1
Runtime error 203 at $0000000000418D5C
  $0000000000418D5C
  $000000000040086D
ldd ./project1:
Code: [Select][root@dockerinaja /]# ldd /project1
        linux-vdso.so.1 (0x00007ffc43fbd000)
        libpthread.so.0 => /lib64/libpthread.so.0 (0x00007f359ff5e000)
        libdl.so.2 => /lib64/libdl.so.2 (0x00007f359ff58000)
        libc.so.6 => /lib64/libc.so.6 (0x00007f359fd92000)
        /lib64/ld-linux-x86-64.so.2 (0x00007f359ff8b000)

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Handoko · 2021-07-26 02:13

This is the default uses clause generated by Lazarus, maybe you can
try:

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 uses 
{$IFDEF UNIX}{$IFDEF UseCThreads}  cthreads,  {$ENDIF}{$ENDIF} 
Interfaces, // this includes the LCL widgetset  Forms, unit1  { you
can add units after this };

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guiwunsch · 2021-07-26 02:22

I've tried it that way. I just removed it to simplify the code in my
sample to show that even codding very "clean" it presents the same
error. I believe it is nothing in the code, but in the Linux
distribution, as the same code works in other distributions. However,
I would like some tips, as I don't know where to start debugging this
problem.

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ccrause · 2021-07-26 06:14

Quote from: guiwunsch on July 26, 2021, 04:22:05 am However, I would
like some tips, as I don't know where to start debugging this problem.
 Runtime error 203 means heap overflow. Perhaps remove cmem, or put it
before cthreads.

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guiwunsch · 2021-07-31 22:54

I noticed that I had a very old version of Free Pascal. I just updated
to version 3.2.0 and it fixed my problem. Thanks.