05-17-2006
after looking through it again, i see that i have to trace my pointer usage a lot better, ill post back when i fix it.
10 More Discussions You Might Find Interesting
1. Programming
hi,
I have made a small C program that make use of malloc and free for processing bitmap images. when i try to run the program, I am getting a error something like
*** glibc detected *** free(): invalid next size (normal): 0x0000000000503e70 ***
I am not sure of which free() is causing this... (1 Reply)
Discussion started by: vbreddy
1 Replies
2. Programming
I am using a structure defined as follows
struct gene_square
{
double *x;
double *y;
};I have class, with a member function which is a pointer of this type:
gene_square* m_Genes;I am allocating memory in the constructors like this:
m_Genes = new gene_square;
for (ii=0;... (1 Reply)
Discussion started by: jatoo
1 Replies
3. Programming
there seems not to be error in this segment. In some computers, it can work well. But in others, it will give a failure.
why it ocurrs and how to deal with it?
in a function:
if( *ver == NULL ) {
*ver = (vertex *) malloc(sizeof(vertex)); //this line
... (17 Replies)
Discussion started by: cdbug
17 Replies
4. Programming
Hi,
I am having a hell of a time getting this to work. So basically, I have opened a popen to run a program that is going to prompt an action to occur half way through, when it gets to this I need to create a separate process and do some stuff, then return to the original process. This works... (0 Replies)
Discussion started by: imrank27
0 Replies
5. Programming
*** glibc detected *** ./a.out: malloc(): memory corruption (fast):
Posted A minute ago
M trying to make multiway tree and dont know what happend when this part of code get executed:
01void ins(NODE *ptr)
02{
03 //working
04 if(ptr!=NULL)
05 {
06 SNODE *var=NULL;
07 var=(SNODE... (3 Replies)
Discussion started by: exgenome
3 Replies
6. Programming
Hi Friends,
while executing the below code, am getting *** glibc detected *** ./ok: malloc(): memory corruption (fast) error, please suggest how to solve this issue.
#include <stdio.h>
#include <string.h>
#include <sqlca.h>
#include <alloca.h>
/* Define constants for VARCHAR... (2 Replies)
Discussion started by: mpjobsrch
2 Replies
7. Programming
Hello.
I'm looking for a quite "interesting" bug I'm using fortran 90, compiler gfortran and the main idea is for every time step I build a bin structure for search contact between particles, for this at the begining
TYPE :: circle_index
INTEGER(kind = 4) :: ind_p
TYPE(circle_index),... (1 Reply)
Discussion started by: Marce
1 Replies
8. Programming
I am facing a problem of memory corruption. The loop runs for the first time but does not go through the second time. What could be the problem?
for(int z=0;z<2;z++)
{
fp=fopen("poly.dat","r");
/*do something which reads this file into a 2D array*/
fclose(fp);
... (10 Replies)
Discussion started by: dare
10 Replies
9. Programming
Currently I test a shared library vendor provided in linux , the following is the simple source :
#include <iostream>
using namespace std;
extern int test1();
extern int test2();
int main()
{
cout << "hello world" << endl ;
return 0 ;
cout << "Test 1" << endl;
... (6 Replies)
Discussion started by: barfatchen
6 Replies
10. Homework & Coursework Questions
Use and complete the template provided. The entire template must be completed. If you don't, your post may be deleted!
1. The problem statement, all variables and given/known data:
I'm doing aproximation of derivative called five-point stencil. For every value of x, in interval , in step... (0 Replies)
Discussion started by: antonija
0 Replies
trace(5) File Formats Manual trace(5)
Name
trace - system call tracer device
Description
The file is the system call trace device. It supports the following system calls: and The device supports 16 (configurable in as TR_USRS)
simultaneous users. It uses an 8192-byte buffer for trace records. The choice of which system calls to trace is done with the system call.
The call is used for efficient reading of the device. The call uses an 8192-byte buffer and returns when the buffer is 60% full. It is
required that the user use a buffer the same size as the system buffer size defined in as TR_BUFSIZE. All operations are defined in the
header file, The calls are:
--------------------------------
ioctl arg (pointer to)
--------------------------------
IOTR_GETOFF int a
IOTR_GETON int a
IOTR_GETALL int a
IOTR_GETPIDS int a[10]
IOTR_GETUIDS int a[10]
IOTR_GETSYSC int a[10]
IOTR_GETPGRP int a[10]
IOTR_SETOFF int a
IOTR_SETON int a
IOTR_SETALL int a
IOTR_SETPIDS int a[10]
IOTR_SETUIDS int a[10]
IOTR_SETSYSC int a[10]
IOTR_SETPGRP int a[10]
--------------------------------
Examples
A prototype example (with missing parts):
char cmd[BUFSIZ],buf[TR_BUFSIZ];
int pgrp[10],i;
fd = open("/dev/trace",0); /* open the device */
pgrp[0] = dofork(cmd); /* fork the command to trace */
for (i=1;i<TR_PGRP;i++) /* dofork sleeps 2 seconds while */
pgrp[i] = 0; /* we set up to do the trace */
i = ioctl(fd,IOTR_SETPGRP,pgrp);/* set up for the trace */
/* select code goes here */
read(fd,buf,sizeof(buf));
See Also
trace(1), close(2), ioctl(2), open(2), read(2), select(2)
trace(5)