[Lldb-commits] [PATCH] D40616: ObjectFileELF: Add support for compressed sections

Zachary Turner via lldb-commits lldb-commits at lists.llvm.org
Wed Nov 29 12:18:04 PST 2017

We’ve had this discussion several times, but at the end of the day nothing
has really changed with the larger llvm project having adopted this model
and having spent significant effort in moving forward with it.

Normally, the reason we don't use this model for LLDB tests is because they
require interactivity, and if need be I can find several threads where the
response has been, specifically "FileCheck tests aren't a good fit for LLDB
because of the interactivity and the nature of the test doesn't lend itself
well to textual output comparison".

So here we have a case where there is no interactivity, and in fact the
test lends itself perfect to textual comparison.  With all due respect,
given that the previously stated reasons for preferring not to use
text-scraping tests don't apply in this case, combined with the fact that
there is a strong desire by the larger project to use a standard,
cross-project testing infrastructure that is understood by several hundred
developers instead of several, I don't see a good reason to not at least
attempt this route in cases where it makes sense.

On Wed, Nov 29, 2017 at 12:07 PM Jim Ingham via Phabricator <
reviews at reviews.llvm.org> wrote:

> jingham added a comment.
> It does look a little weird as a unit test, but to me this is mostly
> because it would been much simpler to write it as a regular SB API test.
> Anyway, I really don't want the details of the text output of lldb
> commands to become API.  Our experience with gdb was that over time as you
> write more and more tests that scrape text output, you end up not being
> able to change command output because the burden of fixing up all the tests
> becomes too onerous.  You can use text scraping in the current lldb
> testsuite.  We discourage that for the reasons above, and try to isolate
> the tests that do so by having lldbutils interfaces to do the explicit
> scraping.  But it is just as easy, and quite often much easier, to examine
> objects directly in the lldb testsuite, so this mechanism encourages
> virtue, even though it doesn't enforce it.
> OTOH adding a test mechanism that explicitly relies only on command output
> scraping leads us down the path that ended up being a real PITN for the gdb
> testsuite.  So for that reason I am not in favor of going this way.
> https://reviews.llvm.org/D40616
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