TMapFile usage on MacOsX

From: daniel cussol <cussol_at_ccimap.in2p3.fr>
Date: Mon, 25 Apr 2005 10:51:48 +0200

Hello MacRooters,
 I run ROOT CVS version (4.03.05) on MacOs X.3.9. I have sent last week a message
(http://root.cern.ch/cgi-bin/print_hit_bold.pl/root/roottalk/roottalk05/0850.html) concerning TMapFile on MacOsX but I had no answers. Except for my bad use of root-cint (thanks to Fons for his quick answer ;-) ), I still not can use TMapFile on MacOsX, althought I run rootn.exe. I have tried several ROOT versions, and I even loaded and compiled the CVS version. The result is always the same: under rootn.exe, when I try to generate a TMapFile, I obtain the following error message:

rootn.exe

---

• *
• W E L C O M E to R O O T *
• *
• Version 4.03/05 24 April 2005 *
• *
• You are welcome to visit our Web site *
• http://root.cern.ch *
• *

  ---

FreeType Engine v2.1.3 used to render TrueType fonts. Compiled for macosx with thread support.

CINT/ROOT C/C++ Interpreter version 5.15.169, Mar 14 2005 Type ? for help. Commands must be C++ statements. Enclose multiple statements between { }. root [0] TMapFile *mf=TMapFile::Create("tutu.map","recreate",10000) Error in <TMapFile::TMapFile>: no memory mapped file capability available Use rootn.exe or link application against "-lNew" root [1]

I tried to track the problem. It appears that the fgHasCustomNewDelete field in TStorage is not set even if rootn.exe is executed. Since this flag is tested in the TMapFile::MapToAddress() method, and the result is kFALSE, the TMapFile::Create method returns the above error message. I tried to track where this flag was set to kTRUE via a TStorage::SetCustomNewDelete() and I found it was called in the G__Base2.cxx and in NexDelete.cxx files. Unfortunately, my understanding of C++ does not allow me to go further. I also tried to set it before calling the TMapFile::Create method, but in this case ROOT crashes with the follwing error message when I update the TMapFile:

rootn.exe

---

• *
• W E L C O M E to R O O T *
• *
• Version 4.03/05 24 April 2005 *
• *
• You are welcome to visit our Web site *
• http://root.cern.ch *
• *

  ---

FreeType Engine v2.1.3 used to render TrueType fonts. Compiled for macosx with thread support.

CINT/ROOT C/C++ Interpreter version 5.15.169, Mar 14 2005 Type ? for help. Commands must be C++ statements. Enclose multiple statements between { }.

root [0] TStorage::SetCustomNewDelete()                           
root [1] TMapFile *mf=TMapFile::Create("tutu.map","recreate",10000)
root [2] mf->Print()                                              
Memory mapped file:   tutu.map
Title:               
Option:               CREATE
Mapped Memory region: 0x3e000 - 0x41000 (0.01 MB)
Current breakval:     0x3e10c
root [3] TH1F *h1=new TH1F("h1","test",100,0,100)                 
root [4] mf->Update()                                             

Fatal in <CustomReAlloc2>: space was not allocated via custom new aborting
Abort

Is the fact that this flag is not set correctly for rootn.exe due to MacOsX limitations? Did I make something wrong or missed something when I have compiled my ROOT versions on MacOsX (I don't think so because this problem is present with the compiled version of ROOT 4.02.00 for MacOsX provided by Fons)? Do I have to set a special environement variable on MacOsX to allow the memory sharing? These errors can be easily reproduced by running the tutorial hprod.C. I have also to mention that all is running correctly on Scientific Linux. That is why I think it might be a configuration problem on my Mac or a general problem on MacOsX.3.9. Has somebody tested hprod.C on his Mac? Did it run correctly?  I hope that the indications I give will be helpfull for sombedy to help me ;-).

Thanks for your answers.
Friendly

-- 
Daniel CUSSOL

LPC Caen IN2P3/ENSICAEN/Universite de Caen
Boulevard du Marechal Juin
14050 CAEN CEDEX

e-mail : cussol_at_in2p3.fr
Tel    : +33-(0)2-31-45-29-73
FAX    : +33-(0)2-31-45-25-49

Received on Mon Apr 25 2005 - 10:50:28 MEST