tree 57f50d4cd399f3999f3c6ac0d8912e9a7891e263
parent 5ef5d4561dbc40c128d1e9bbd8e2da525adcf581
author Amin Hassani <ahassani@google.com> 1501881920 -0700
committer chrome-bot <chrome-bot@chromium.org> 1502500025 -0700

update_engine: Use the bsdiff library instead of its executable

Currently we use bsdiff binary to generate BSDIFF and SOURCE_BSDIFF
operations. This involves writing both the source and destination
extents into disk and letting bsdiff read them again into memory. Now
that we actually can use the bsdiff library itself, why not use the
provided bsdiff library functions that can directly read source and
destination data from the memory that we already have. This CL will
reduce the patch generating time and memory footprint.

BUG=none
TEST=cros_workon_make --board=amd64-generic --test update_engine; \
brillo_update_payload generate --payload=payload.delta \
--target_image=veyron-minnie-R62-9804.0.0.bin --source_image=veyron_minnie-R61-9765.13.0.bin

Change-Id: Ib115eb5186c133d56dab91f73a2bde3176f5732d
Reviewed-on: https://chromium-review.googlesource.com/602887
Commit-Ready: Amin Hassani <ahassani@chromium.org>
Tested-by: Amin Hassani <ahassani@chromium.org>
Reviewed-by: Ben Chan <benchan@chromium.org>