Problem with NSAutoreleasePool in GNUstep

[ramana rao]

 

JP,

 

    It seeme there is a problem with GNUstep NSAutorelease pools, unless I am very much mistaken

 

 

 

    I wrote a simple program like follows,

 

 

    ***********************************

    Check Program memory at Stage1

 

    NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];

 

    Allocate some memory, say by initializing a huge array theArray

 

    Check Program memory at Stage2

 

    release theArray

 

   Check Program memory at Stage3

 

   [pool release];

 

   Check Program memory at Stage4

 

  ***********************************

   

  I am expecting the Program memory at Stage1 and Stage4 to be same, and it is so in OpenStep, but not so in GNUstep.   In GNUstep the memory allocated in within Autorelease pool block is not released.

 

Interestingly (in GNUstep) if the above code portion if I repeat, (say by keeping a loop) the later iterations are not taking new memory. Previously allocated memory is being used

 

This a serious problem, with WarmStartServer some time 1 GB is used up and that goes unreleased

 

Any idea on this

 

thanks

 

Ramana Rao

 

 

 

 

The Sample code I am giving below

 

 #import <Foundation/Foundation.h>
#import "OIProcessStatistics.h"
int main (int argc, const char *argv[])
{
    NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];
    NSString *str;
    int i,j;
    // insert your code here
     NSLog(@"processStatistics");
     file://str = [OIProcessStatistics getCurrentProcessMemoryUsage];
     NSLog(@"Memory Usage = %@",[OIProcessStatistics getCurrentProcessMemoryUsage]);

 

     {
       NSAutoreleasePool * poolInner = [[NSAutoreleasePool alloc] init];
      

     int i;
       NSMutableArray *theArr = [ [NSMutableArray alloc] init];
       NSLog(@"Memory Usage before allocation = %@",[OIProcessStatistics getCurrentProcessMemoryUsage]);
       for(i = 0; i< 100000; i++){
          [theArr addObject:[NSString stringWithFormat:@"Hellllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllloooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooo %d",i]];
     }
    

     NSLog(@"Memory Usage after allocation = %@",[OIProcessStatistics getCurrentProcessMemoryUsage]);
      [theArr removeAllObjects];
    

     NSLog(@"Memory Usage after removal = %@",[OIProcessStatistics getCurrentProcessMemoryUsage]);

 

      [theArr release];
      [poolInner release];
    

    NSLog(@"Memory Usage  after autorlelease pool = %@",[OIProcessStatistics getCurrentProcessMemoryUsage]);
     }

    [pool release];
    exit(0);       // insure the process exit status is 0
}

 

 

 

The supplementary class

 

 

OIProcessStatistics.m

/* OIProcessStatistics.m created by Administrator on Thu 25-Oct-2001 */

 

#import "OIProcessStatistics.h"
#include <unistd.h>
#include <stdlib.h>
@implementation OIProcessStatistics
+ (NSString *)getCurrentProcessMemoryUsage
{
 char buffer[1000];
 int i;
 NSString *str;
 NSMutableArray *arr;
 file://NSLog(@"pID = %d",getpid());
 sprintf(buffer,"echo q | prstat -p %d > /OITempFile.txt",getpid());
 system(buffer);
        
 file://NSLog(@"Str = %@",str);
 arr = [str componentsSeparatedByString:@" "];
 file://NSLog(@"arr _One_ = %@",arr);
 for(i = 0; i <[arr count];i++){
  if( [ [arr objectAtIndex:i] length] == 0){
   [arr removeObjectAtIndex:i];
  --i;}
 }
        file://NSLog(@"arr Two = %@",arr);
 return [arr objectAtIndex:13];
}
@end

 

OIProcessStatistics.h

 

/* OIProcessStatistics.h created by Administrator on Thu 25-Oct-2001 */

 

#import <Foundation/Foundation.h>

 

@interface OIProcessStatistics : NSObject
{

 

}
+ (NSString *)getCurrentProcessMemoryUsage;
@end