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Project Description

fpvgcc is a python script/package to help analyse code footprint on embedded microcontrollers using GCC generated Map files.

This module uses information contained within .map files generated by gcc (when invoked with -Wl,-Map,out.map), to provide easily readable summaries of static memory usage at various levels of the code hierarchy. This package generates no information that isn’t already contained within the .map file.

The provided outputs can be used to gain insight into the relative sizes of included code, and aid in prioritizing static memory optimization for very low memory platforms. Some provided functionality may also deliver minor usability improvements to the workflow involved in parsing though generated assembly listings.

Warning

This package does not attempt to perform any kind of dynamic analysis. All memory usage reported refers only to static memory usage. This means the size of actual functions and global variables which are instantiated in the C code itself.

Anything on the call stack, such as function locals, will not be accounted for. Similarly, anything in the heap which is allocated at runtime using malloc or similar will not be accounted for.

Due to this, the utility of this module is likely limited to code written for highly memory constrained embedded microcontrollers, where dynamic memory allocation is anyway avoided when possible.

Note

This script was first written based on the format of mapfiles generated by msp430-elf-gcc, v4.9.1. Over time, it was modifed to accept elements found in mapfiles generated by later versions and gcc-based toolchains for other platforms.

Still, remember that the file parsing was implemented by observing the content of real mapfiles, and not based on a file format specification. Even with toolchains it was written to support, there are large sections of the file that are not actually used. Due to this, the outputs generated are not always accurate. Various boundary conditions result in minor errors in size reporting.

Release History

Release History

0.7

This version

History Node

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0.6

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0.5

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TODO: Figure out how to actually get changelog content.

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Download Files

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File Name & Checksum SHA256 Checksum Help Version File Type Upload Date
fpvgcc-0.7-py2-none-any.whl (14.9 kB) Copy SHA256 Checksum SHA256 2.7 Wheel Aug 5, 2016
fpvgcc-0.7.tar.gz (30.0 kB) Copy SHA256 Checksum SHA256 Source Aug 5, 2016

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