Analyze Glibc heap memory

Question

I research an embedded device that use GLIBC 2.25.

When I look at /proc/PID/maps I see under the heap section some anonymous sections ,I understand that sections create when the process use new

I dump those sections with dd and there is there interesting value that I want to understand is that buffer allocated or free, and what is the size of this buffer.

How can I do that please?

There is just not much information here to act on. Can you add more details? — Henrique Bucher
– Henrique Bucher, Commented Jan 11, 2023 at 11:43
Your actual results, what you see. You posted this question several days ago and nobody even commented on it for a reason. — Henrique Bucher
– Henrique Bucher, Commented Jan 11, 2023 at 20:10

Yogesh Dhawale · Accepted Answer · 2023-01-18 05:32:05Z

Instead of analyzing the memory from proc, you may want to try following options, limited to your env.

use tools like valgrind if you suspect any kind of leaks or invalid read/writes.
rather than looking at output of dd, attach to running process and inspect memory within process, gives you context to make sense of memory usage.
use logging to dump addresses of allocation/free/read/write. This allows you to build better understanding of memory usage.

You may have to use all of the above options depending upon the complexity of your task.

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