angr.state_plugins.heap.heap_libc

class angr.state_plugins.heap.heap_libc.SimHeapLibc

Bases: SimHeapBase

A class of heap that implements the major libc heap management functions.

malloc(sim_size)

A somewhat faithful implementation of libc malloc.

Parameters:

sim_size – the amount of memory (in bytes) to be allocated

Returns:

the address of the allocation, or a NULL pointer if the allocation failed

free(ptr)

A somewhat faithful implementation of libc free.

Parameters:

ptr – the location in memory to be freed

calloc(sim_nmemb, sim_size)

A somewhat faithful implementation of libc calloc.

Parameters:

• sim_nmemb – the number of elements to allocated

• sim_size – the size of each element (in bytes)

Returns:

the address of the allocation, or a NULL pointer if the allocation failed

realloc(ptr, size)

A somewhat faithful implementation of libc realloc.

Parameters:

• ptr – the location in memory to be reallocated

• size – the new size desired for the allocation

Returns:

the address of the allocation, or a NULL pointer if the allocation was freed or if no new allocation was made