1 # Copyright 2009-2012 Free Software Foundation, Inc.
3 # This program is free software; you can redistribute it and/or modify
4 # it under the terms of the GNU General Public License as published by
5 # the Free Software Foundation; either version 3 of the License, or
6 # (at your option) any later version.
8 # This program is distributed in the hope that it will be useful,
9 # but WITHOUT ANY WARRANTY; without even the implied warranty of
10 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 # GNU General Public License for more details.
13 # You should have received a copy of the GNU General Public License
14 # along with this program. If not, see <http://www.gnu.org/licenses/>.
17 # In gdb inferior function calls, if a C++ exception is raised in the
18 # dummy-frame, and the exception handler is (normally, and expected to
19 # be) out-of-frame, the default C++ handler will (wrongly) be called
20 # in an inferior function call.
21 # This is incorrect as an exception can normally and legally be handled
22 # out-of-frame. The confines of the dummy frame prevent the unwinder
23 # from finding the correct handler (or any handler, unless it is
24 # in-frame). The default handler calls std::terminate. This will kill
25 # the inferior. Assert that terminate should never be called in an
26 # inferior function call. These tests test the functionality around
27 # unwinding that sequence and also tests the flag behaviour gating this
32 # This test is largely based of gdb.base/callfuncs.exp.
34 if { [skip_cplus_tests] } { continue }
36 if [target_info exists gdb,nosignals] {
37 verbose "Skipping gdb2495.exp because of nosignals."
41 # On SPU this test fails because the executable exceeds local storage size.
42 if { [istarget "spu*-*-*"] } {
46 set testfile "gdb2495"
47 set srcfile ${testfile}.cc
48 set binfile $objdir/$subdir/$testfile
50 # Create and source the file that provides information about the compiler
51 # used to compile the test case.
52 if [get_compiler_info "c++"] {
56 if { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug c++}] != "" } {
61 # Some targets can't do function calls, so don't even bother with this
63 if [target_info exists gdb,cannot_call_functions] {
64 setup_xfail "*-*-*" 2416
65 fail "This target can not call functions"
71 gdb_reinitialize_dir $srcdir/$subdir
74 if ![runto_main] then {
75 perror "couldn't run to main"
79 # See http://sourceware.org/gdb/bugs/2495
81 # Test normal baseline behaviour. Call a function that
82 # does not raise an exception.
83 gdb_test "p exceptions.no_throw_function()" " = 1"
84 # And one that does but handles it in-frame.
85 gdb_test "p exceptions.throw_function_with_handler()" " = 2"
86 # Both should return normally.
88 # Test basic unwind. Call a function that raises an exception but
89 # does not handle it. It should be rewound.
90 gdb_test "p exceptions.throw_function()" \
91 "The program being debugged entered a std::terminate call, .*" \
92 "Call a function that raises an exception without a handler."
94 # Make sure that after rewinding we are back at the call parent.
97 "bt after returning from a popped frame"
99 # Make sure the only breakpoint is the one set via the runto_main
100 # call and that the std::terminate breakpoint has evaporated and
102 gdb_test "info breakpoints" \
105 # Turn off this new behaviour.
106 gdb_test_multiple "set unwind-on-terminating-exception off" \
107 "Turn unwind-on-terminating-exception off" {
108 -re "$gdb_prompt $" {pass "set unwinn-on-terminating-exception off"}
109 timeout {fail "(timeout) set unwind-on-terminating-exception off"}
112 # Check that it is turned off.
113 gdb_test "show unwind-on-terminating-exception" \
114 "exception is unhandled while in a call dummy is off.*" \
115 "Turn off unwind on terminating exception flag"
117 # Check that the old behaviour is restored.
118 gdb_test "p exceptions.throw_function()" \
119 "The program being debugged was signaled while in a function called .*" \
120 "Call a function that raises an exception with unwinding off.."
122 # Restart the inferior back at main.
123 if ![runto_main] then {
124 perror "couldn't run to main"
129 # Check to see if the new behaviour alters the unwind signal
130 # behaviour; it should not. Test both on and off states.
132 # Turn on unwind on signal behaviour.
133 gdb_test_multiple "set unwindonsignal on" "Turn unwindonsignal on" {
134 -re "$gdb_prompt $" {pass "set unwindonsignal on"}
135 timeout {fail "(timeout) set unwindonsignal on"}
138 # Check that it is turned on.
139 gdb_test "show unwindonsignal" \
140 "signal is received while in a call dummy is on.*" \
141 "Turn on unwind on signal"
143 # Check to see if new behaviour interferes with
144 # normal signal handling in inferior function calls.
145 gdb_test "p exceptions.raise_signal(1)" \
146 "To change this behavior use \"set unwindonsignal off\".*"
148 # And reverse - turn off again.
149 gdb_test_multiple "set unwindonsignal off" "Turn unwindonsignal off" {
150 -re "$gdb_prompt $" {pass "set unwindonsignal off"}
151 timeout {fail "(timeout) set unwindonsignal off"}
154 # Check that it is actually turned off.
155 gdb_test "show unwindonsignal" \
156 "signal is received while in a call dummy is off.*" \
157 "Turn off unwind on signal"
159 # Check to see if new behaviour interferes with
160 # normal signal handling in inferior function calls.
161 gdb_test "p exceptions.raise_signal(1)" \
162 "To change this behavior use \"set unwindonsignal on\".*"