Can you have a memory leak without malloc?

Is it possible to make memory leak without using malloc? is: Yes, it is possible.

What is Valgrind memory leak?

Valgrind Memcheck is a tool that detects memory leaks and memory errors. Some of the most difficult C bugs come from mismanagement of memory: allocating the wrong size, using an uninitialized pointer, accessing memory after it was freed, overrunning a buffer, and so on.

What does indirectly lost mean Valgrind?

“indirectly lost” means your program is leaking memory in a pointer-based structure. (E.g. if the root node of a binary tree is “definitely lost”, all the children will be “indirectly lost”.) If you fix the “definitely lost” leaks, the “indirectly lost” leaks should go away.

How do I check for memory leaks?

Some of the most common and effective ways are:

  1. Using Memory Profilers. Memory profilers are tools that can monitor memory usage and help detect memory leaks in an application.
  2. Verbose Garbage Collection. To obtain a detailed trace of the Java GC, verbose garbage collection can be enabled.
  3. Using Heap Dumps.

What happens if you don’t deallocate memory?

If you lose all pointers to a chunk of memory without deallocating that memory then you have a memory leak. Your program will continue to own that memory, but has no way of ever using it again. A very small memory leak is not a problem.

What happens if you dont deallocate dynamic memory?

If you don’t free/delete dynamically allocated arrays they don’t get freed/deleted. That’s all. Use vector it deletes itself automatically and has a push_back function to add new elements to the existing array.

What is Valgrind used for?

Valgrind (/ˈvælɡrɪnd/) is a programming tool for memory debugging, memory leak detection, and profiling. Valgrind was originally designed to be a free memory debugging tool for Linux on x86, but has since evolved to become a generic framework for creating dynamic analysis tools such as checkers and profilers.

Is Valgrind ever wrong?

Yes, there are false positives with Valgrind, that’s why it has suppression files for particular glibc and gcc versions, for example. The false positives may arise if you are using older valgrind with newer gcc and glibc, i.e., valgrind 3.3 with glibc 2.9.