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# Copyright (C) 2015-2019 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 <http://www.gnu.org/licenses/>.
# This test spawns a few threads that constantly trip on a breakpoint
# that does not cause a user-visible stop. While one of those
# breakpoints is being handled, the main thread exits the whole
# process. The result is that the current thread for which GDB is
# handling the event disappears too and any attempt to access
# register/memory now errors out. GDB and GDBserver should be able to
# handle this scenario gracefully.
#
# See https://sourceware.org/bugzilla/show_bug.cgi?id=18749
standard_testfile
set linenum [gdb_get_line_number "set break here"]
if {[build_executable "failed to prepare" $testfile $srcfile {debug pthreads}] == -1} {
return -1
}
# The test proper. If COND_BP_TARGET is true, then test with
# conditional breakpoints evaluated on the target side, if possible.
proc do_test { non_stop cond_bp_target } {
global GDBFLAGS
global gdb_prompt
global binfile
global linenum
set saved_gdbflags $GDBFLAGS
set GDBFLAGS [concat $GDBFLAGS " -ex \"set non-stop $non_stop\""]
clean_restart $binfile
set GDBFLAGS $saved_gdbflags
if ![runto_main] then {
fail "can't run to main"
return 0
}
# Whether it's known that the test fails.
set should_kfail 0
if {![gdb_is_target_remote]} {
set should_kfail 1
} else {
if {!$cond_bp_target} {
# Leaving breakpoint evaluation to GDB exposes failures
# similar to native debugging.
gdb_test_no_output "set remote conditional-breakpoints-packet off"
set should_kfail 1
} else {
set test "show remote conditional-breakpoints-packet"
gdb_test_multiple $test $test {
-re "currently enabled\.\r\n$gdb_prompt $" {
pass $test
}
-re "currently disabled\.\r\n$gdb_prompt $" {
unsupported "no support for target-side conditional breakpoints"
return
}
}
set should_kfail 1
}
}
gdb_test "break $linenum if zero == 1" \
"Breakpoint .*" \
"set breakpoint that evals false"
set test "continue &"
gdb_test_multiple $test $test {
-re "$gdb_prompt " {
pass $test
}
}
set ok 0
# Setup the kfail upfront in order to also catch GDB internal
# errors.
if {$should_kfail} {
setup_kfail "gdb/18749" "*-*-*"
}
set test "inferior 1 exited"
gdb_test_multiple "" $test {
-re "Inferior 1 \(\[^\r\n\]+\) exited normally" {
set ok 1
# Clear the kfail to avoid a PASS -> KPASS dance across
# runs.
clear_kfail "*-*-linux*"
pass $test
}
-re "$gdb_prompt " {
# Several errors end up at the top level, and printing the
# prompt.
fail "$test (prompt)"
}
-re "Cannot access memory" {
fail "$test (memory error)"
}
eof {
fail "$test (GDB died)"
}
}
if {!$ok} {
# No use testing further.
return
}
gdb_test "info threads" "No threads\." \
"no threads left"
}
foreach_with_prefix non_stop {"on" "off"} {
foreach_with_prefix cond_bp_target {1 0} {
do_test $non_stop $cond_bp_target
}
}
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