I could reproduce the problem on Fedora 18 x86_64. The error shows up in
revision 23457, the only file changed in this revision is
compiler/arm/aoptcpu.pas.
Checkin comment for file was:
Revision *23457*
<http://svn.freepascal.org/cgi-bin/viewvc.cgi?view=revision&revision=23457>
- (view
<http://svn.freepascal.org/cgi-bin/viewvc.cgi/trunk/compiler/arm/aoptcpu.pas?revision=23457&view=markup>)
(annotate
<http://svn.freepascal.org/cgi-bin/viewvc.cgi/trunk/compiler/arm/aoptcpu.pas?annotate=23457>)
- [select for diffs]
<http://svn.freepascal.org/cgi-bin/viewvc.cgi/trunk/compiler/arm/aoptcpu.pas?r1=23457&view=log>
Modified /Sun Jan 20 14:57:43 2013 UTC/ (4 days, 6 hours ago) by /florian/
File length: 108993 byte(s)
Diff to previous 23456
<http://svn.freepascal.org/cgi-bin/viewvc.cgi/trunk/compiler/arm/aoptcpu.pas?r1=23456&r2=23457>
* improve ShiftShiftShift2ShiftShift to look further ahead
* check register usage so the destination register can be differen
On a mac the problem does not exist, there i can build latest revision
in svn without problems after applying Jeppe's patch for the IT problem
(Thank you for that one, Jeppe!!)
So, Koenraad, perhaps you can do a svn update -r 23456 (or 23455) and
retry the build, then you should hopefully have a very recent version of
arm-embedded compiler+rtl.
The compiler segfaults when trying to compile rtl:
make -C embedded all
make[3]: Entering directory `/home/ring/devel/fpc/rtl/embedded'
/usr/bin/mkdir -p /home/ring/devel/fpc/rtl/units/arm-embedded
/home/ring/devel/fpc/compiler/ppcrossarm -Cparmv7m @rtl.cfg -Ur
-Tembedded -Parm -XParm-embedded- -Xr -Ur -Xs -O2 -n -Fi../inc -Fi../arm
-FE. -FU/home/ring/devel/fpc/rtl/units/arm-embedded -darm -dRELEASE -Us
-Sg system.pp
make[3]: *** [system.ppu] Segmentation fault (core dumped)
make[3]: Leaving directory `/home/ring/devel/fpc/rtl/embedded'
Michael
Am 24.01.13 12:32, schrieb Jeppe Græsdal Johansen:
Den 24-01-2013 12:16, Koenraad Lelong skrev:
On 24-01-13 11:24, Jeppe Græsdal Johansen wrote:
Looks like a memory corruption problem. I just tried to compile trunk
with 2.6.0 as a starting compiler on win32 and had no problems(apart
from the broken RTL).
What starting compiler and what os/cpu are you on?
Hi,
What do you mean with memory corruption ? Is the memory of my PC
broken, or is the compiler messing with the memory and then corrupts
it ?
As far as I see it's not possible to compile the RTL. That's my
problem. The crosscompiler seems OK, when I run "ppcrossarm -i" I see
the output I expect.
I'm trying to be as clear as possible, but sometimes I presume too
much and the reader does not understand what I want to say :-(
What I was trying to do is pinpointing where it goes wrong. So I
manualy tried running the last line before the compilation (how to do
that : see the wiki) stopped with the segmentation fault. And I did
this with gdb to get a backtrace. That's what I sent to the list.
You say you can't compile the RTL, what error do you get ?
I'm compiling this with FPC 2.6.0, on Opensuse 12.1 64 bit.
Anyway, thanks for your reply.
Regards,
Koenraad Lelong.
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What I mean is that I think the crash you experience means there's a
bug in the compiler because your backtrace showed it crashed inside
the heap manager. A typical sign after someone is using deallocated
memory, or having buffer overflows.
I have fixed the issue with the RTL and submitted a patch:
http://bugs.freepascal.org/view.php?id=23738
It was the same you wrote about some time ago.
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