From 5ba325978c354b9f0e238864e3afb4f9b528c04e Mon Sep 17 00:00:00 2001 From: Sergio Durigan Junior Date: Wed, 12 Aug 2015 12:32:16 -0400 Subject: [PATCH] Guarantee save-and-restore of GDBFLAGS on gdb.base/checkpoint-ns.exp Keith found out that several tests were failing when testing the native-gdbserver board on Fedora (x86_64). Strangely, these failures had not been reported by our BuildBot. Later, he found that the reason for this was because the failures only happened when running the testsuite without FORCE_PARALLEL (i.e., on serial mode; maybe it would be worth having a builder testing things on serial...). Then, he decided to start bisecting the changes to see which one introduced the failure (it was not trivial to know this only by looking at gdb.log). After a lot of time, he found that Pedro's commit e1316e60d4d1fe406efc6e7536b2bdb43733e9d2 was the culprit. There was nothing wrong in the code, but the new gdb.base/checkpoint-ns.exp testcase did something that left the GDBFLAGS variable in an inconsistent state. This test works by modifying this variable to set non-stop on, sourcing gdb.base/checkpoint.exp (which does the hard work), and then restoring the old value on GDBFLAGS. However, this was not working because gdb.base/checkpoint.exp bails out if it is being tested on gdbserver, and when it calls "continue" the control goes back to the function calling the tests, and not to gdb.base/checkpoint-ns.exp. The fix is simple: just wrap the "source" call, and make gdb.base/checkpoint-ns.exp aware of the "continue"/"return" calls made by gdb.base/checkpoint.exp. gdb/testsuite/ChangeLog: 2015-08-12 Sergio Durigan Junior Pedro Alves Keith Seitz * gdb.base/checkpoint-ns.exp: Use save_vars to save and restore GDBFLAGS. --- gdb/testsuite/ChangeLog | 7 +++++++ gdb/testsuite/gdb.base/checkpoint-ns.exp | 9 ++++----- 2 files changed, 11 insertions(+), 5 deletions(-) diff --git a/gdb/testsuite/ChangeLog b/gdb/testsuite/ChangeLog index 3324baa..916da1f 100644 --- a/gdb/testsuite/ChangeLog +++ b/gdb/testsuite/ChangeLog @@ -1,3 +1,10 @@ +2015-08-12 Sergio Durigan Junior + Pedro Alves + Keith Seitz + + * gdb.base/checkpoint-ns.exp: Use save_vars to save and restore + GDBFLAGS. + 2015-08-12 Patrick Palka * gdb.base/gdbhistsize-history.exp diff --git a/gdb/testsuite/gdb.base/checkpoint-ns.exp b/gdb/testsuite/gdb.base/checkpoint-ns.exp index d3698ba..d470bc4 100644 --- a/gdb/testsuite/gdb.base/checkpoint-ns.exp +++ b/gdb/testsuite/gdb.base/checkpoint-ns.exp @@ -18,9 +18,8 @@ # We drive non-stop mode from a separate file because the whole test # takes a while to run. This way, we can test both modes in parallel. -set saved_gdbflags $GDBFLAGS -append GDBFLAGS " -ex \"set non-stop on\"" +save_vars { GDBFLAGS } { + append GDBFLAGS " -ex \"set non-stop on\"" -source $srcdir/$subdir/checkpoint.exp - -set GDBFLAGS $saved_gdbflags + source $srcdir/$subdir/checkpoint.exp +} -- 2.7.4