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[/] [openrisc/] [trunk/] [gnu-src/] [gdb-6.8/] [gdb/] [testsuite/] [gdb.base/] [freebpcmd.exp] - Blame information for rev 157

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1 24 jeremybenn
#   Copyright 2003, 2007, 2008 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 .
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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 srcfile1 ${testfile}1.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 [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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