97a5b505d2
* gdb.base/freebpcmd.exp: Delete unused variable. Specify srcfile when setting a breakpoint.
123 lines
3.8 KiB
Text
123 lines
3.8 KiB
Text
# Copyright 2003, 2007, 2008, 2009 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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# This is a regression test for the following bug, as of 2003-12-12:
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#
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# Set a breakpoint which will be hit many times. Attach a complex set
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# of commands to it, including a "continue" command. Run the program,
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# so that the breakpoint is hit, its commands get executed, and the
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# program continues and hits the breakpoint again. You will see
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# messages like "warning: Invalid control type in command structure.",
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# or maybe GDB will crash.
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#
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# When the breakpoint is hit, bpstat_stop_status copies the
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# breakpoint's command tree to the bpstat. bpstat_do_actions then
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# calls execute_control_command to run the commands. The 'continue'
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# command invokes the following chain of calls:
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#
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# continue_command
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# -> clear_proceed_status
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# -> bpstat_clear
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# -> free_command_lines
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# -> frees the commands we are currently running.
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#
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# When control does eventually return to execute_control_command, GDB
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# continues to walk the tree of freed command nodes, resulting in the
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# error messages and / or crashes.
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#
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# Since this bug depends on storage being reused between the time that
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# we continue and the time that we fall back to bpstat_do_actions, the
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# reproduction recipe is more delicate than I would like. I welcome
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# suggestions for improving this.
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set prms_id 0
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set bug_id 0
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set testfile "freebpcmd"
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set srcfile ${testfile}.c
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set binfile ${objdir}/${subdir}/${testfile}
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if { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug}] != "" } {
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untested freebpcmd.exp
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return -1
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}
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gdb_exit
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gdb_start
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gdb_reinitialize_dir $srcdir/$subdir
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gdb_load ${binfile}
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gdb_test "break ${srcfile}:[gdb_get_line_number "euphonium"]" "" "set breakpoint"
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# The goal of all this is to make sure that there's plenty of memory
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# churn, and different amounts of it each time the inferior stops;
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# this seems to make GDB crash more reliably.
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set lines {{if (i%2) == 0}
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{echo "even "}
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{print i}
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{else}
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{echo "odd "}
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{print i}
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{end}
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{set variable $foo = 0}
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{set variable $j = 0}
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{while $j < i}
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{set variable $foo += $j}
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{set variable $j++}
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{end}
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{print $foo}
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{if i != 40}
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{c}
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{end}
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{end}}
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send_gdb "commands\n"
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for {set i 0} {$i < [llength $lines]} {incr i} {
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gdb_expect {
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-re ".*>" {
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send_gdb "[lindex $lines $i]\n"
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}
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-re "$gdb_prompt $" {
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set reason "got top-level prompt early"
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break
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}
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timeout {
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set reason "timeout"
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break
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}
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}
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}
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if {$i >= [llength $lines]} {
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pass "send breakpoint commands"
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} else {
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fail "send breakpoint commands ($reason)"
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}
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gdb_run_cmd
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set timeout 120
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gdb_test_multiple "" "run program with breakpoint commands" {
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-re "warning: Invalid control type in command structure" {
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kfail "gdb/1489" "run program with breakpoint commands"
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}
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-re "$gdb_prompt $" {
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pass "run program with breakpoint commands"
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}
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eof {
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kfail "gdb/1489" "run program with breakpoint commands (GDB died)"
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}
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}
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