topic Re: Find class/function contribution to final code size in LPCXpresso IDE

Find class/function contribution to final code size

lpcware — Wed, 15 Jun 2016 21:31:28 GMT

Content originally posted in LPCWare by miccio on Sat Jul 25 06:23:52 MST 2015
Hello everyone,

i'm using LPCXpresso 7.8 together with an LPC11C24 to develop an C++ application using a quite large library (nominal footprint of 22k). In addition to that I wrote a sort of HAL for the various peripherals that are going to be used.
Unfortunately when I try to compile the software I end up with the flash overflow error, even in Release build with -Os enabled on compiler, linker (link-time optimization enabled as well).
I therefore thought of optimizing everything by looking into the .map file in order to find out how much each class/function/header contributes to the code size.
Is there any documentation of the .map file format used by the toolchain or - better yet - a better way of investigating that?

Re: Find class/function contribution to final code size

lpcware — Wed, 15 Jun 2016 21:31:29 GMT

Content originally posted in LPCWare by R2D2 on Sat Jul 25 07:47:47 MST 2015

Quote: miccio
....a better way of investigating that?

Disassemble the complete executable :O

https://www.lpcware.com/content/faq/lpcxpresso/disassembling-objects-and-executables

Re: Find class/function contribution to final code size

lpcware — Wed, 15 Jun 2016 21:31:29 GMT

Content originally posted in LPCWare by TheFallGuy on Sat Jul 25 14:47:02 MST 2015
You might also try the symbol viewer. I think this shows function sizes.

Re: Find class/function contribution to final code size

lpcware — Wed, 15 Jun 2016 21:31:30 GMT

Content originally posted in LPCWare by miccio on Sun Jul 26 15:19:05 MST 2015

Quote: R2D2
Disassemble the complete executable :O

How would I be able to get the sizes from the individual parts, especially after optimization? :)

Quote: TheFallGuy
You might also try the symbol viewer. I think this shows function sizes.

I will check both on Monday and see what I can get. Thanks so far!