tree ff89d43d8cc1391ca0d6febed888860eee8b23dc
parent 0ede7bdf41b49022284cb6337bfd56b42aa594f6
author Xiaochu Liu <xiaochu@chromium.org> 1558052854 -0700
committer chrome-bot <chrome-bot@chromium.org> 1558735892 -0700

update_engine: trigger a crash on unrecoverable condition

CURLM_INTERNAL_ERROR and CURLM_OUT_OF_MEMORY are two libcurl error codes
that caller (update_engine) has no way to recover on its own. Reference: https://curl.haxx.se/libcurl/c/libcurl-errors.html

Since those error conditions aren't recoverable and might be responsible
for the failures to update observed in crbug.com/927039, we exit and let the
system respawn update_engine to start from a fresh state and recover.

BUG=chromium:962730,chromium:927039
TEST=unittest

Change-Id: I55946e58e518da5bc5cb0c23690430c6298b8582
Reviewed-on: https://chromium-review.googlesource.com/1616425
Commit-Ready: ChromeOS CL Exonerator Bot <chromiumos-cl-exonerator@appspot.gserviceaccount.com>
Tested-by: Xiaochu Liu <xiaochu@chromium.org>
Legacy-Commit-Queue: Commit Bot <commit-bot@chromium.org>
Reviewed-by: Amin Hassani <ahassani@chromium.org>