154 lines
5.3 KiB
Text
154 lines
5.3 KiB
Text
# Copyright 2009-2016 Free Software Foundation, Inc.
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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# In gdb inferior function calls, if a C++ exception is raised in the
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# dummy-frame, and the exception handler is (normally, and expected to
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# be) out-of-frame, the default C++ handler will (wrongly) be called
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# in an inferior function call.
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# This is incorrect as an exception can normally and legally be handled
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# out-of-frame. The confines of the dummy frame prevent the unwinder
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# from finding the correct handler (or any handler, unless it is
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# in-frame). The default handler calls std::terminate. This will kill
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# the inferior. Assert that terminate should never be called in an
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# inferior function call. These tests test the functionality around
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# unwinding that sequence and also tests the flag behaviour gating this
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# functionality.
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#
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# PR c++/9600.
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# This test is largely based of gdb.base/callfuncs.exp.
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if { [skip_cplus_tests] } { continue }
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if [target_info exists gdb,nosignals] {
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verbose "Skipping gdb2495.exp because of nosignals."
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continue
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}
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# On SPU this test fails because the executable exceeds local storage size.
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if { [istarget "spu*-*-*"] } {
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return 0
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}
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standard_testfile .cc
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# Create and source the file that provides information about the compiler
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# used to compile the test case.
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if [get_compiler_info "c++"] {
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return -1
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}
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# Some targets can't do function calls, so don't even bother with this
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# test.
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if [target_info exists gdb,cannot_call_functions] {
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setup_xfail "*-*-*" 2416
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fail "This target can not call functions"
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continue
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}
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if {[prepare_for_testing $testfile.exp $testfile $srcfile {debug c++}]} {
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return -1
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}
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if ![runto_main] then {
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perror "couldn't run to main"
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continue
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}
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# See http://sourceware.org/gdb/bugs/2495
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# Test normal baseline behaviour. Call a function that
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# does not raise an exception.
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gdb_test "p exceptions.no_throw_function()" " = 1"
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# And one that does but handles it in-frame.
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gdb_test "p exceptions.throw_function_with_handler()" " = 2"
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# Both should return normally.
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# Test basic unwind. Call a function that raises an exception but
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# does not handle it. It should be rewound.
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gdb_test "p exceptions.throw_function()" \
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"The program being debugged entered a std::terminate call, .*" \
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"Call a function that raises an exception without a handler."
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# Make sure that after rewinding we are back at the call parent.
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gdb_test "bt" \
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"#0 main.*" \
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"bt after returning from a popped frame"
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# Make sure the only breakpoint is the one set via the runto_main
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# call and that the std::terminate breakpoint has evaporated and
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# cleaned-up.
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gdb_test "info breakpoints" \
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"gdb2495\.cc.*"
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# Turn off this new behaviour.
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gdb_test_multiple "set unwind-on-terminating-exception off" \
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"Turn unwind-on-terminating-exception off" {
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-re "$gdb_prompt $" {pass "set unwinn-on-terminating-exception off"}
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timeout {fail "(timeout) set unwind-on-terminating-exception off"}
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}
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# Check that it is turned off.
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gdb_test "show unwind-on-terminating-exception" \
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"exception is unhandled while in a call dummy is off.*" \
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"Turn off unwind on terminating exception flag"
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# Check that the old behaviour is restored.
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gdb_test "p exceptions.throw_function()" \
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"The program being debugged was signaled while in a function called .*" \
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"Call a function that raises an exception with unwinding off.."
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# Restart the inferior back at main.
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if ![runto_main] then {
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perror "couldn't run to main"
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continue
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}
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# Check to see if the new behaviour alters the unwind signal
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# behaviour; it should not. Test both on and off states.
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# Turn on unwind on signal behaviour.
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gdb_test_multiple "set unwindonsignal on" "Turn unwindonsignal on" {
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-re "$gdb_prompt $" {pass "set unwindonsignal on"}
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timeout {fail "(timeout) set unwindonsignal on"}
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}
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# Check that it is turned on.
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gdb_test "show unwindonsignal" \
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"signal is received while in a call dummy is on.*" \
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"Turn on unwind on signal"
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# Check to see if new behaviour interferes with
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# normal signal handling in inferior function calls.
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gdb_test "p exceptions.raise_signal(1)" \
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"To change this behavior use \"set unwindonsignal off\".*"
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# And reverse - turn off again.
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gdb_test_multiple "set unwindonsignal off" "Turn unwindonsignal off" {
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-re "$gdb_prompt $" {pass "set unwindonsignal off"}
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timeout {fail "(timeout) set unwindonsignal off"}
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}
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# Check that it is actually turned off.
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gdb_test "show unwindonsignal" \
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"signal is received while in a call dummy is off.*" \
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"Turn off unwind on signal"
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# Check to see if new behaviour interferes with
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# normal signal handling in inferior function calls.
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gdb_test "p exceptions.raise_signal(1)" \
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"To change this behavior use \"set unwindonsignal on\".*"
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