gecko-dev/layout/tools
Andrew Halberstadt e03d78fada Bug 1324961 - [reftest] Process stdout/stderr separately on Windows, r=gbrown
On Windows log lines are buffered in 4kb chunks instead of line buffered. This
means when a log on stdout exceeds this limit, a log from stderr can be
interleaved in the middle. This was causing frequent intermittent failures on
Windows when logging the suite_start message (which is much larger than 4kb).

This patch ensures that instead of redirecting stderr to stdout, we process
that stream independtly (though still using the same output handler). This
means we are guaranteed not to have any log interleaving, but it comes at the
cost of potentially losing the true log ordering. For that reason, this
behaviour is only enabled on Windows. Only the ordering between streams can be
different, and in practice this difference should be really small.

There is currently no good solution for both separating stdout/stderr and
preserving exact log ordering. See bug 798300 for more details.

MozReview-Commit-ID: 5W8I4u15uyM

--HG--
extra : rebase_source : ff6ce214b738dd09081b4b359a49ea7c3b0e4f65
2017-10-05 15:58:31 -04:00
..
layout-debug Bug 1390428 (part 9) - Remove nsXPIDLCString. r=erahm. 2017-08-17 15:29:03 +10:00
recording
reftest Bug 1324961 - [reftest] Process stdout/stderr separately on Windows, r=gbrown 2017-10-05 15:58:31 -04:00
tests