Diving into glibc heap
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In this section, implementation of glibc's heap management functions will be discussed in depth. The analysis was done on glibc's source code dated . The source is very well documented.
Apart from the source code, the matter presented is influenced by:
Before moving into the implementation, it is important to keep the following notes in mind:
Instead of size_t
, INTERNAL_SIZE_T
is used internally (which by default is to size_t
).
Alignment
is defined as 2 * (sizeof(size_t))
.
MORECORE
is defined as the routine to call to obtain more memory. By default it is as sbrk
.
Next, we shall study the different data types used internally, bins, chunks, and internals of the different functions used.
r2Con2016 Glibc Heap Analysis with radare2