Error 3 : Dynamic Memory Allocation - 2024.1 English

Enable the _ERROR6_ macro in the application source file linux_test_application.c and disable _ERROR3_ and _ERROR5_ as shown below.

//#define _ERROR3_
//#define _ERROR5_
#define _ERROR6_

The goal of dynamic memory allocation debugging is to understand memory management.

1. Under FLOW, highlight the linux_test_app, and Build.

2. Under FLOW, highlight the linux_test_app, and Debug to launch a Launch Configuration.

3. Select, the Target Connection; either physical_zcu102, or qemu_zcu102 and the Work Directory to /home/petalinux`

1. The code stops at the program entry.

2. Use debugging techniques such as the Variables view, step over, breakpoints, and so on to identify the incorrect memory assignment.

3. Place a breakpoint at the following lines.

   *ptr = i + 1;
   ptr++;
   

4. Click Resume and let the tool stop at the breakpoint.

5. Open Variables view to check the ptr value. Observe that a value is not correctly assigned to a pointer.

6. Comment out the following code lines:

   #ifdef _ERROR6_
   ................
   ................
   ................
   //ptr = i + 1;
   //ptr++;
   ................
   

7. Uncomment the following line of code to make the appropriate pointer assignment.

   #ifdef _ERROR6_
   ................
   ................
   ................
   ................
   ptr[i] = i + 1;
   ................
   

8. Rebuild the application.

9. Relaunch the Launch Configuration

10. Observe the output.