Re: Unexpected 'Out of Memory'

It looks to me like you found a bug in 5.8.2 (or later?).

I get a segfault at the same point that you get the "out of memory" error.

P:\test>t
  1 is a square
  4 is a square
  9 is a square
 16 is a square
 25 is a square
 36 is a square
 49 is a square
 64 is a square
 81 is a square
100 is a square
  1 is a square
  4 is a square
  9 is a square
 16 is a square
 25 is a square
 36 is a square
 49 is a square
 64 is a square
 81 is a square
100 is a square
  1 is a square
  4 is a square
  9 is a square
 16 is a square
 25 is a square
 36 is a square
 49 is a square
# segfault occurs here.
AppName: perl.exe     AppVer: 5.8.2.808     ModName: perl58.dll
ModVer: 5.8.2.808     Offset: 0006676a


P:\test>perl -V
Summary of my perl5 (revision 5 version 8 subversion 2) configuration:
  Platform:
    osname=MSWin32, osvers=4.0, archname=MSWin32-x86-multi-thread
    uname=''
    config_args='undef'
    hint=recommended, useposix=true, d_sigaction=undef
    usethreads=undef use5005threads=undef useithreads=define usemultip
+licity=define
    useperlio=define d_sfio=undef uselargefiles=define usesocks=undef
    use64bitint=undef use64bitall=undef uselongdouble=undef
    usemymalloc=n, bincompat5005=undef
[SNIP]
[download]

Examine what is said, not who speaks.

"Efficiency is intelligent laziness." -David Dunham
"Think for yourself!" - Abigail
Timing (and a little luck) are everything!

Comment on Re: Unexpected 'Out of Memory' Download Code

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Re: Unexpected 'Out of Memory' by Abigail-II (Bishop) on Jan 13, 2004 at 17:10 UTC
Well, I installed valgrind on this box, and it came with a long list of reports, ending with: `==1340== More than 30000 total errors detected. I'm not reporting any + more. ==1340== Final error counts will be inaccurate. Go fix your program! ==1340== Rerun with --error-limit=no to disable this cutoff. Note ==1340== that errors may occur in your program without prior warning f +rom ==1340== Valgrind, because errors are no longer being displayed.` [download] I'll write a bugreport tonight. Abigail	[reply] [d/l]
Re: Re: Unexpected 'Out of Memory' by BrowserUk (Patriarch) on Jan 13, 2004 at 17:31 UTC
If it helps, the segfault on my system occurs at this instruction (marked '>') in the execution of Perl_mark_stack_grow, called from Perl_sv_clear. `Disassembly of Function perl58.dll!Perl_sv_clear (0x28066647) 0x2806674E: CALL 0x2805FB9D ; SYM:Perl_m +arkstack_grow 0x28066753: POP ECX 0x28066754: MOV ECX,DWORD PTR [ESI+0x40] ; <==0x28066 +74B(*-0x9) 0x28066757: MOV EAX,EBX 0x28066759: SUB EAX,DWORD PTR [ESI+0xC] 0x2806675C: PUSH 0x96 0x28066764: ADD EBX,0x4 0x28066767: SAR EAX,0x2 > 0x2806676A: MOV DWORD PTR [ECX],EAX 0x2806676C: MOV EAX,DWORD PTR [EBP+0x8] ; ARG:0x8 0x2806676F: MOV DWORD PTR [EBX],EAX` [download] Up to that point the stack is showing PID: 604 TID: 468 - Stack Contents for 0x2806676A 0x2806676A: perl58.dll:Perl_sv_clear + 0x0123 0x28066D47: perl58.dll:Perl_sv_free + 0x0108 0x28065787: perl58.dll:Perl_sv_force_normal_flags + 0x00AE 0x28060E74: perl58.dll:Perl_leave_scope + 0x0320 0x2805FB9A: perl58.dll:Perl_pop_scope + 0x001C 0x2803F50E: perl58.dll:Perl_sv_compile_2op + 0x5E1A 0x2805F97F: perl58.dll:Perl_runops_standard + 0x000C 0x2808A125: perl58.dll:RunPerl + 0x0086 0x00401012: perl.exe+0x00001012 0x77E814C7: GetCurrentDirectoryW + 0x0044 [download] which may or may not be useful in tracking down the problem? Examine what is said, not who speaks. "Efficiency is intelligent laziness." -David Dunham "Think for yourself!" - Abigail Timing (and a little luck) are everything!	[reply] [d/l] [select]