Hi,
while testing our code on freebsd 9RC1/32 bit with fpc 2.6rc1
it seems that all programs compiled on that system using threads crash
with an "Illegal Instruction 4 (core dumped)" error.
Binaries compiled on Freebsd 8.2/32 and transferred to the 9RC1 box work,
which is a bit strange.
Any ideas ?
further details below:
Simple test case:
---
program thrd;
{$mode objfpc}{$H+}
uses
cthreads,Classes;
type
T=class(TThread)
private
i:integer;
procedure Execute;override;
end;
procedure T.Execute;
begin
inc(i);
end;
begin
T.create(false);
end.
---
After compiling fpc 2_6 fixes with debug info, and running the program
gdb stops at the below marked line in cthreads.pp
procedure CAllocateThreadVars;
var
dataindex : pointer;
begin
{ we've to allocate the memory from system }
{ because the FPC heap management uses }
{ exceptions which use threadvars but }
{ these aren't allocated yet ... }
{ allocate room on the heap for the thread vars }
>>>>>
DataIndex:=Pointer(Fpmmap(nil,threadvarblocksize,3,MAP_PRIVATE+MAP_ANONYMOUS,-1,0));
FillChar(DataIndex^,threadvarblocksize,0);
pthread_setspecific(tlskey,dataindex);
end;
--
helmut
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