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We've reports of hash collision with codeparser. Looking at the way collision problems occur with md5 and the way our function templating works, I can believe we may run into issues. This patch therefore switches to sha256. Performance wise, parse time could appear to rise by 4s in 374s Before: 384329 in 2.966s (md5) After: 349743 in 2.340s (sha256) 34723 in 1.245s (md5) since we still have md5 used elsewhere in the code, something we should look at next (using sha256 everywhere is around 5.3s in total) Unfortunately this does nearly double the size of the codeparser cache file due to the hash size change. (Bitbake rev: 4bed7a97198176503fe8c72d8dd7c36b28fc9dd1) Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org> |
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Bitbake
=======
BitBake is a generic task execution engine that allows shell and Python tasks to be run
efficiently and in parallel while working within complex inter-task dependency constraints.
One of BitBake's main users, OpenEmbedded, takes this core and builds embedded Linux software
stacks using a task-oriented approach.
For information about Bitbake, see the OpenEmbedded website:
http://www.openembedded.org/
Bitbake plain documentation can be found under the doc directory or its integrated
html version at the Yocto Project website:
http://yoctoproject.org/documentation
Contributing
------------
Please refer to
http://www.openembedded.org/wiki/How_to_submit_a_patch_to_OpenEmbedded
for guidelines on how to submit patches, just note that the latter documentation is intended
for OpenEmbedded (and its core) not bitbake patches (bitbake-devel@lists.openembedded.org)
but in general main guidelines apply. Once the commit(s) have been created, the way to send
the patch is through git-send-email. For example, to send the last commit (HEAD) on current
branch, type:
git send-email -M -1 --to bitbake-devel@lists.openembedded.org
Mailing list:
http://lists.openembedded.org/mailman/listinfo/bitbake-devel
Source code:
http://git.openembedded.org/bitbake/