[review] [gdb/testsuite] Add note to 'Race detection' entry in README

Tom de Vries (Code Review)
2020-02-03T10:17:14Z

2020-02-03 Tom de Vries <tdevries@suse.de>

* README (Race detection): Add note.

Change-Id: I12ef2f0ec35abc5a0221585bf30e5f4f0616aa7c
---
M gdb/testsuite/README
1 file changed, 7 insertions(+), 0 deletions(-)

diff --git a/gdb/testsuite/README b/gdb/testsuite/README
index 4795df1..3e42526 100644
--- a/gdb/testsuite/README
+++ b/gdb/testsuite/README
@@ -352,6 +352,13 @@
make -j10 check-read1 TESTS="*/paginate-*.exp"
make -j10 check READ1="1"

+Note: While the intention is to detect races and make otherwise passing tests
+fail, it can also have the effect of making otherwise failing tests pass.
+This happens f.i. if the test is trying to match a gdb prompt using an end of
+input marker "${gdb_prompt} $" and there is output after the gdb prompt. This
+may either pass or fail in normal operation, but using check-read1 will ensure
+that it passes.
+
Testsuite Configuration
***********************

--
Gerrit-Project: binutils-gdb
Gerrit-Branch: master
Gerrit-Change-Id: I12ef2f0ec35abc5a0221585bf30e5f4f0616aa7c
Gerrit-Change-Number: 762
Gerrit-PatchSet: 1
Gerrit-Owner: Tom de Vries <tdevries@suse.de>
Gerrit-MessageType: newchange