From 5c31b35808e467d39d05ffa95428e22bb10fd72d Mon Sep 17 00:00:00 2001 From: Tom de Vries Date: Mon, 26 Aug 2019 19:24:59 +0200 Subject: [gdb, c++] Improve error message when using libstdcxx without SDT probes When using catch catch/rethrow/catch, a libstdcxx with SDT probes is required for both the regexp argument, and the convenience variable $_exception ( https://sourceware.org/gdb/current/onlinedocs/gdb/Set-Catchpoints.html ). Currently, when using these features with a libstdcxx without SDT probes, we get the cryptic error message: ... not stopped at a C++ exception catchpoint ... Improve this by instead emitting the more helpful: ... did not find exception probe (does libstdcxx have SDT probes?) ... Tested on x86_64-linux. gdb/ChangeLog: 2019-08-26 Tom de Vries PR c++/24852 * break-catch-throw.c (fetch_probe_arguments): Improve error mesage when pc_probe.prob == NULL. gdb/testsuite/ChangeLog: 2019-08-26 Tom de Vries PR c++/24852 * gdb.cp/no-libstdcxx-probe.exp: New test. --- gdb/testsuite/ChangeLog | 5 ++++ gdb/testsuite/gdb.cp/no-libstdcxx-probe.exp | 41 +++++++++++++++++++++++++++++ 2 files changed, 46 insertions(+) create mode 100644 gdb/testsuite/gdb.cp/no-libstdcxx-probe.exp (limited to 'gdb/testsuite') diff --git a/gdb/testsuite/ChangeLog b/gdb/testsuite/ChangeLog index c41b498..3117fe7 100644 --- a/gdb/testsuite/ChangeLog +++ b/gdb/testsuite/ChangeLog @@ -1,5 +1,10 @@ 2019-08-26 Tom de Vries + PR c++/24852 + * gdb.cp/no-libstdcxx-probe.exp: New test. + +2019-08-26 Tom de Vries + * lib/gdb.exp (skip_libstdcxx_probe_tests_prompt): Return 1 if probe * tests need to be skipped. * gdb.cp/exceptprint.exp: Update call to skip_libstdcxx_probe_tests. diff --git a/gdb/testsuite/gdb.cp/no-libstdcxx-probe.exp b/gdb/testsuite/gdb.cp/no-libstdcxx-probe.exp new file mode 100644 index 0000000..79826ea --- /dev/null +++ b/gdb/testsuite/gdb.cp/no-libstdcxx-probe.exp @@ -0,0 +1,41 @@ +# Copyright 2019 Free Software Foundation, Inc. + +# This program is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; either version 3 of the License, or +# (at your option) any later version. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with this program. If not, see . + +standard_testfile exceptprint.cc + +if {[skip_cplus_tests]} { + return -1 +} + +if {[prepare_for_testing "failed to prepare" $testfile $srcfile {debug c++}]} { + return -1 +} + +if {![runto_main]} { + return -1 +} + +if { [skip_libstdcxx_probe_tests] == 0 } { + untested "Have libstdc++ stap probe" + return -1 +} + +gdb_test "catch throw" "Catchpoint $decimal \\(throw\\)" \ + "catch throw" + +gdb_test "continue" "Continuing.*Catchpoint $decimal.*" + +gdb_test "print \$_exception" \ + "did not find exception probe \\(does libstdcxx have SDT probes\\?\\).*" -- cgit v1.1