Tutorial

  • 2021.1
  • 12/04/2020
  • Public Content

Resolve Issue

Intel® Inspector
is a dynamic memory and threading error checking tool for users developing serial and multithreaded applications on Windows* and Linux* operating systems. This topic is part of a
tutorial
that shows how to find and fix
threading
errors using the
Intel Inspector
and a
C++
sample application.
To fix the detected threading error:

Investigate the Issue

The commenting embedded throughout the
find_and_fix_threading_errors.cpp
sample file reveals the cause of the data race problems: Multiple threads are concurrently accessing the global variable
col
. One possible correction strategy: Change the global variable to a local variable.

Access an Editor

Scroll to near line 80 in either code location region and double-click the
color col;
line in the
Source
tab to open the
find_and_fix_threading_errors.cpp
source file in an editor.

Change the Source Code

  1. Comment
    color col;
    and uncomment
    //color col;
    near line 88 to localize the variable
    col
    to the function
    render_one_pixel
    .
  2. Save your edits.
  3. Click the result tab to return to the
    Sources
    window.
    The
    Sources
    window data is unchanged because it is a snapshot of the source code at the time of analysis.
  4. Click the
    Summary
    button to redisplay the
    Summary
    window.

Product and Performance Information

1

Performance varies by use, configuration and other factors. Learn more at www.Intel.com/PerformanceIndex.