What is massif Valgrind?

Massif is a heap profiler. It measures how much heap memory your program uses. This includes both the useful space, and the extra bytes allocated for book-keeping and alignment purposes. It can speed up your program — a smaller program will interact better with your machine’s caches and avoid paging.

How does Valgrind detect memory leaks?

Valgrind includes an option to check for memory leaks. With no option given, it will list a heap summary where it will say if there is any memory that has been allocated but not freed. If you use the option –leak-check=full it will give more information.

Is still reachable a memory leak?

“definitely lost” means your program is leaking memory — fix it! “possibly lost” means your program is probably leaking memory, unless you’re doing funny things with pointers. “still reachable” means your program is probably ok — it didn’t free some memory it could have. This is quite common and often reasonable.

How to use Valgrind to check for memory leaks?

Memcheck is one of the most popular tool in the Valgrind suite of tools that can be used to detect memory-related errors in a program executable. In this tutorial, we will learn how to use valgrind to check for memory leaks using memcheck tool through some examples.

How to use the massif tool in Valgrind?

Massif’s Output File Format To use this tool, you must specify –tool=massif on the Valgrind command line. 9.1. Overview Massif is a heap profiler. It measures how much heap memory your program uses. This includes both the useful space, and the extra bytes allocated for book-keeping and alignment purposes.

What does massif tell you about heap memory?

Massif can help identify these leaks. Importantly, Massif tells you not only how much heap memory your program is using, it also gives very detailed information that indicates which parts of your program are responsible for allocating the heap memory.

Are there any known limitations of using Valgrind?

Here are some of the known limitations of using Valgrind : 1 It slows down the overall processing of your program. 2 Cannot detect buffer overflows in case of stack variables. 3 It consumes a lot of memory. More