How can i get memory size allocated by my program?

Question

I write my project by c with opencv. I want print info about allocated memory or memory used by my program. Is there a functions, that give me the information about the memory ? Finally I'm using Qt for Linux and Windows ,

Thanks in advance.

This previous thread has some ideas http://stackoverflow.com/questions/6192531/best-strategy-for-profiling-memory-usage-of-my-code-open-source-and-3rd-party — Ari, Sep 21 '12 at 13:20

Dan · Answer 1 · 2012-09-21T15:24:42.840

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You can write wrappers to malloc and free that track how much memory you're using.

EDIT: If you also want to intercept calls to malloc and free in external libraries, you will have to define them in a shared library and load it before libc. How you do this depends on your OS.

edited Sep 21 '12 at 15:24

answered Sep 21 '12 at 13:21

Dan

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if you load a library and that uses the unwrapped `malloc`, is that memory used by your programn or not? – Remus Rusanu Sep 21 '12 at 13:34
could you give me example about malloc as wrapper and free . – Aym Sep 22 '12 at 13:55
@RemusRusanu it's absolutely possible indeed. One can call OS memory reservation functions directly. like `sbrk` (though unrecommended because it interferes with some malloc implementations). `memmap` which is used by modern mallocs, and gives isolated chunks of mem. `VirtualAlloc` on Win32, same concept. Or the `NTHeap` stuff too. – v.oddou Mar 23 '16 at 12:42

Remus Rusanu · Answer 2 · 2012-09-21T13:33:27.160

On Linux you look into your own process info pseudo-file:

/proc/[pid]/statm
Provides information about memory usage, measured in pages. The columns are:
size       total program size
           (same as VmSize in /proc/[pid]/status)
resident   resident set size
           (same as VmRSS in /proc/[pid]/status)
share      shared pages (from shared mappings)
text       text (code)
lib        library (unused in Linux 2.6)
data       data + stack
dt         dirty pages (unused in Linux 2.6)

On Windows you look at you own process Process Object performance counters:

Private Bytes Shows the current number of bytes that this process has allocated that cannot be shared with other processes.

score -1 · Answer 3 · answered Sep 21 '12 at 18:10

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You can also do some level of memory analysis of Code/Data segment during build time if you check elf, dump or map file. And GCC command line options for stack usage are: -fstack-usage and -fcallgraph-info.

answered Sep 21 '12 at 18:10

Rajiv Kumar Srivastav

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-1 I am pretty sure the OP is asking for the memory allocated at runtime. – quantum Sep 22 '12 at 01:35

How can i get memory size allocated by my program?

3 Answers3