Code crashes with glibc error

[Sharey]

Hi… I am trying to run the code:

///

 void y_h3()
  {

   # define n  1
  Int_t irun[] ={902,903,904};
  TFile *f[n];
  TTree *tree[n];
  Double_t epr1, epr2, eclk, ebcm, ebcm_up, eclk_r, etime, etrack, epion1, epion2, et2, en1, ecer, eytar, edelta,eth,ephi;
 
   for (Int_t i=0; i<n; i++) {
    f[i] = new TFile(Form("file.root",irun[i]),"read");
    tree[i] = (TTree*)f[i]->Get("T");
    tree_TS[i] = (TTree*)f[i]->Get("TSLeft");
    tree[i]->SetBranchAddress("L.prl1.e",&epr1);
    tree[i]->SetBranchAddress("L.prl2.e", &epr2);
} 

  for(Int_t i=0; i<n; i++){
    in =tree[i]->GetEntries();
    for(Int_t j=0; j<1000; j++){
      tree[i]->GetEntry(j);}
       }

  }

The code crashing in the j-loop with the following error:

*** glibc detected *** /u/apps/root/5.34.36/root/bin/root.exe: double free or corruption (out): 0x0000000002907c10 ***
======= Backtrace: =========
/lib64/libc.so.6[0x3759c75e66]
/lib64/libc.so.6[0x3759c789b3]
/u/apps/root/5.34.36/root/lib/libCint.so(G__destroy_upto+0x2ca)[0x7f48e63223ca]
/u/apps/root/5.34.36/root/lib/libCint.so(G__interpret_func+0x4084)[0x7f48e6291da4]
/u/apps/root/5.34.36/root/lib/libCint.so(G__getfunction+0x192b)[0x7f48e627df7b]
/u/apps/root/5.34.36/root/lib/libCint.so(G__getitem+0x86e)[0x7f48e625c8ae]
/u/apps/root/5.34.36/root/lib/libCint.so(G__getexpr+0x4048)[0x7f48e6261428]
/u/apps/root/5.34.36/root/lib/libCint.so(G__calc_internal+0x3f8)[0x7f48e626a938]
/u/apps/root/5.34.36/root/lib/libCint.so(G__process_cmd+0x4ea3)[0x7f48e62e6b53]
/u/apps/root/5.34.36/root/lib/libCore.so(_ZN5TCint11ProcessLineEPKcPN12TInterpreter10EErrorCodeE+0x536)[0x7f48e6d28246]
/u/apps/root/5.34.36/root/lib/libCore.so(_ZN5TCint16ProcessLineSynchEPKcPN12TInterpreter10EErrorCodeE+0x103)[0x7f48e6d25893]
/u/apps/root/5.34.36/root/lib/libCore.so(_ZN12TApplication11ExecuteFileEPKcPib+0x848)[0x7f48e6d73848]
/u/apps/root/5.34.36/root/lib/libCore.so(_ZN12TApplication11ProcessLineEPKcbPi+0x8f6)[0x7f48e6d72cd6]
/u/apps/root/5.34.36/root/lib/libRint.so(_ZN5TRint15HandleTermInputEv+0x21b)[0x7f48e751b66b]
/u/apps/root/5.34.36/root/lib/libCore.so(_ZN11TUnixSystem16CheckDescriptorsEv+0x14e)[0x7f48e6d652fe]
/u/apps/root/5.34.36/root/lib/libCore.so(_ZN11TUnixSystem16DispatchOneEventEb+0xd3)[0x7f48e6d655e3]
/u/apps/root/5.34.36/root/lib/libCore.so(_ZN7TSystem9InnerLoopEv+0x16)[0x7f48e6dcae66]
/u/apps/root/5.34.36/root/lib/libCore.so(_ZN7TSystem3RunEv+0x7b)[0x7f48e6dcc8eb]
/u/apps/root/5.34.36/root/lib/libCore.so(_ZN12TApplication3RunEb+0x1f)[0x7f48e6d6fabf]
/u/apps/root/5.34.36/root/lib/libRint.so(_ZN5TRint3RunEb+0x294)[0x7f48e751cbd4]
/u/apps/root/5.34.36/root/bin/root.exe(main+0x4c)[0x40107c]
/lib64/libc.so.6(__libc_start_main+0xfd)[0x3759c1ed5d]
/u/apps/root/5.34.36/root/bin/root.exe[0x400f49]

What is going wrong with my code?

When I remove:

tree[i]->GetEntry(j);

the code does not crash. But I need to call the values of each entry.
Thanks

Sharey

[Danilo]

Hi,

can you check if any of the pointers you are using are null, i.e. the ones stored in the tree C array? Alternatively, could you share one of the rootfiles you are using, i.e. “file.root902”, “file.root903”, “file.root904”?

Cheers,
D

[Wile_E_Coyote]

#include "TFile.h"
#include "TTree.h"

void y_h3() {
  const Int_t n = 1;
  Int_t irun[] = {902, 903, 904}; // note: at least [n] values are required
  TFile *f[n] = {0};
  TTree *tree[n] = {0};
  TTree *tree_TS[n] = {0};
  Double_t epr1, epr2, eclk, ebcm, ebcm_up, eclk_r, etime, etrack, epion1, epion2, et2, en1, ecer, eytar, edelta,eth,ephi;
  
  for (Int_t i = 0; i < n; i++) {
    f[i] = TFile::Open(Form("file%d.root", irun[i]), "read");
    if ((!f[i]) || f[i]->IsZombie()) { delete f[i]; f[i] = 0; continue; };
    f[i]->GetObject("T", tree[i]);
    f[i]->GetObject("TSLeft", tree_TS[i]);
    if (tree[i]) {
      tree[i]->SetBranchAddress("L.prl1.e", &epr1);
      tree[i]->SetBranchAddress("L.prl2.e", &epr2);
    }
  }
  
  for(Int_t i = 0; i < n; i++) {
    if (!tree[i]) continue;
    Long64_t in = tree[i]->GetEntries();
    for(Int_t j = 0; j < in; j++) {
      tree[i]->GetEntry(j);
    }
  }
  
  for (Int_t i = 0; i < n; i++) {
    delete f[i]; // automatically deletes all related trees
  }
}

[Sharey]

Hi,

dpiparo:

I checked, and you are right! one variable was stored as an array. That fixed the problem Thanks.

Wile_E_Coyote:

Thanks!!