cppcoreguidelines-no-malloc¶

This check handles C-Style memory management using malloc(), realloc(), calloc() and free(). It warns about its use and tries to suggest the use of an appropriate RAII object. Furthermore, it can be configured to check against a user-specified list of functions that are used for memory management (e.g. posix_memalign()). See C++ Core Guidelines.

There is no attempt made to provide fix-it hints, since manual resource management isn’t easily transformed automatically into RAII.

// Warns each of the following lines.
// Containers like std::vector or std::string should be used.
char* some_string = (char*) malloc(sizeof(char) * 20);
char* some_string = (char*) realloc(sizeof(char) * 30);
free(some_string);

int* int_array = (int*) calloc(30, sizeof(int));

// Rather use a smartpointer or stack variable.
struct some_struct* s = (struct some_struct*) malloc(sizeof(struct some_struct));