Memory corruption

Hi All,
I seem to be having a memory issue with a ROOT script. I load two 1D histograms and then take the FFT of each. It seems that when I execute fft1->GetPointsComplex(re_full1,im_full1), I receive the following error:

root [0] .x deconv.C
*** Error in `/home/root-6.06.06/bin/root.exe’: malloc(): memory corruption: 0x00000000035f91e0 ***

I am not really sure where my memory is going. Here is the script I am working with:

#include <stdio.h>
#include <TMath.h>
#include <TCanvas.h>
#include <iostream>
#include <TROOT.h>
#include <TChain.h>
#include <TObject.h>
#include <TRandom.h>
#include <TFile.h>
#include <math.h>
#include <TF1Convolution.h>
#include <TF1.h>
#include <TH1F.h>
#include <TGraph.h>
#include <TVirtualFFT.h>
#include <TH1D.h>
#include <complex.h>

//using namespace std;

//using namespace RooFit;

void deconv()
  TFile *f1 = new TFile( "/home/jason/code/dataAnalysisCode/062016Bates/001.root" );
	TH1F *combineTOF1=(TH1F*)f1->Get("arate_ch0");
	TH1F *combineTOF2=(TH1F*)f1->Get("arate2_ch0");

  //Compute the transform of gamma flash////////////////////////////////////////
  int n=4000;

  TH1 *hm1 =0;
  hm1 = combineTOF1->FFT(hm1, "MAG");

  //Look at the phase of the output
  TH1 *hp1 = 0;
  hp1 = combineTOF1->FFT(hp1, "PH");
  //Look at the DC component and the Nyquist harmonic:
  Double_t re1, im1;
  TVirtualFFT *fft1 = TVirtualFFT::GetCurrentTransform();

  //Use the following method to get the full output:
  Double_t *re_full1 = new Double_t[n];
  Double_t *im_full1 = new Double_t[n];
  //Other code follows here



without the input file it is not possible to reproduce the issue.
Did you try to run the process under valgrind or GDB?


Hi Danilo,

Thank you for your response. It seems that I am probably having a heap overflow issue. I believe it is a problem with one of my pointers in my code, but I am still not exactly sure.



Running your application under valgrind should provide you with the information needed to track this problem down.