Valgrind is an instrumentation framework for dynamic analysis tools. At this school we use the tools for checking memory management bugs, but it includes many other tools such as for finding threading bugs and analysing cache access patterns. This exercise will introduce you to the basic mechanics of using Valgrind; later exercises will go into more detail.
Build memerror.cc:
[studentNM@esc-XY ~]$ cd esc17/hands-on/basic
[studentNM@esc-XY basic]$ g++ -g -o memerror memerror.cc
Run the test program under valgrind:
[studentNM@esc-XY basic]$ valgrind ./memerror
Re-build the executable without using the -g option and check the
consequences in the valgrind output.
The compiler can sometimes warn us about problems in our code:
[studentNM@esc-XY basic]$ g++ -g -Wall -Wextra -o memerror memerror.cc
Sanitizers can also help:
[studentNM@esc-XY basic]$ g++ -fsanitize=address -g -Wall -Wextra -o memerror memerror.cc
[studentNM@esc-XY basic]$ ./memerror