From: "Lars O. Hansen" <lars DOT o DOT hansen AT gmx DOT de>
Newsgroups: comp.os.msdos.djgpp
Subject: problem with malloc and free
Date: Sat, 14 Dec 2002 10:47:30 +0100
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To: djgpp AT delorie DOT com
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Reply-To: djgpp AT delorie DOT com

the following code, if compiled per "gcc test.c" and executed (DOS), crashes for some compilations
and then when compiled again crashes not and then again when compiled again, crashes again.

if the (float*) casts are removed, the code always crashes.

if then either atexit(freeall), or either free(cxphi) in main or either free(cm) in freeall or
either free(cxphi) in freeall is removed, the code does not crash.

I am using djgpp downloaded last Wednesday from Zip Picker.



int array_size=360;

float *cm;
float *cxphi;


void setupall(void);
void freeall(void);


int main()
 {
  cm=(float*)malloc(3*sizeof(float)*array_size);
  cxphi=(float*)malloc(4*sizeof(float)*array_size);

  atexit(freeall);

  free(cxphi);
 }

void freeall()
 {
  free(cm);
  free(cxphi);
 }



Any help?


Lars