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Visualising your memory usage

Eliot Stock

The linker in the GCC toolchain, ld, produces a *.Map file which shows you how the memory on your micro is being used. This file is a goldmine of information but it's a bit difficult for humans to absorb.

I've whipped up a web page which uses the excellent D3.js library to draw a visualisation of your memory usage, using the *.Map file as input. Blocks of memory are drawn proportionally so it's easy to see how much memory you have left and where it's all being used. Click on a block to zoom in on it.

You can run the tool right off the github project page, or download it and modify it for your needs. Pull requests welcome.

https://github.com/eliotstock/memory

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Cheers,

Eliot

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  • Ah, you are right. If I join the lines together with .text in them:

    ex -c '%g/\.text/j' -c "wq" prog.map

    then I get a lot more info. A better one would be the one that leaves alone the lines that are already on one line:

    ex -c '%g/\.text\S*[\s]*$/j' -c "wq" prog.map

    And succeeded by replacing .text.blah with .text:

    sed -i 's/\.text\S*/.text/g' prog.map

    The only thing left is that the items get really small when you're program gets big. I've to look in the zooming options in your code, but thanks again!

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  • Ah, you are right. If I join the lines together with .text in them:

    ex -c '%g/\.text/j' -c "wq" prog.map

    then I get a lot more info. A better one would be the one that leaves alone the lines that are already on one line:

    ex -c '%g/\.text\S*[\s]*$/j' -c "wq" prog.map

    And succeeded by replacing .text.blah with .text:

    sed -i 's/\.text\S*/.text/g' prog.map

    The only thing left is that the items get really small when you're program gets big. I've to look in the zooming options in your code, but thanks again!

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