e22f8b7c8c
Switch the license of all .f and .f90 files to GPLv3.
Switch the license of all .s and .S files to GPLv3.
389 lines
11 KiB
Text
389 lines
11 KiB
Text
# Copyright 1999, 2001, 2002, 2003, 2004, 2005, 2006, 2007
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# 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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# Please email any bugs, comments, and/or additions to this file to:
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# bug-gdb@gnu.org
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#### Dining Philosophers, on LinuxThreads - Jim Blandy <jimb@cygnus.com>
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####
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#### At the moment, GDB's support for LinuxThreads is pretty
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#### idiosyncratic --- GDB's output doesn't look much like the output
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#### it produces for other thread implementations, messages appear at
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#### different times, etc. So these tests are specific to LinuxThreads.
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####
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#### However, if all goes well, Linux will soon have a libthread_db
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#### interface, and GDB will manage it the same way it does other
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#### libthread_db-based systems. Then, we can adjust this file to
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#### work with any such system.
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### Other things we ought to test:
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### stepping a thread while others are running
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### killing and restarting
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### quitting gracefully
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if $tracelevel then {
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strace $tracelevel
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}
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set prms_id 0
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set bug_id 0
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# This only works with Linux configurations.
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if ![istarget *-*-linux-gnu*] then {
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return
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}
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set testfile "linux-dp"
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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 libs=-lpthread}] != ""} {
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return -1
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}
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gdb_start
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gdb_reinitialize_dir $srcdir/$subdir
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gdb_load ${binfile}
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send_gdb "set print sevenbit-strings\n" ; gdb_expect -re "$gdb_prompt $"
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runto_main
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# There should be no threads initially.
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gdb_test "info threads" "" "info threads 1"
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# Try stepping over the thread creation function.
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gdb_breakpoint [gdb_get_line_number "linuxthreads.exp: create philosopher"]
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set expect_manager -1
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for {set i 0} {$i < 5} {incr i} {
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gdb_continue_to_breakpoint "about to create philosopher: $i"
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send_gdb "info threads\n"
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set threads_before {}
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gdb_expect {
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-re "info threads\r\n" {
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exp_continue
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}
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-re "^. +(\[0-9\]+ Thread \[-0-9a-fx\]+) \[^\n\]*\n" {
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verbose -log "found thread $expect_out(1,string)" 2
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lappend threads_before $expect_out(1,string)
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exp_continue
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}
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-re "^\[^\n\]*\n" {
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verbose -log "skipping line" 2
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}
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-re "^$gdb_prompt $" {
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}
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timeout {
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fail "(timeout) info threads before: $i"
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}
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}
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send_gdb "next\n"
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set threads_created 0
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gdb_expect {
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-re "^next\r\n" {
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exp_continue
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}
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-re "^ *\[_!\] \[0-9\]* \[_!\]\r\n" {
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# Ignore program output.
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exp_continue -continue_timer
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}
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-re "^\\\[New \[^\]\n\]+\\\]\[^\n\]+\n" {
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incr threads_created
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exp_continue
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}
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-re "^189\[^\n\]+\n" {
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exp_continue
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}
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-re "^$gdb_prompt $" {
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}
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-re "Program received signal.*(Unknown signal|SIGUSR|Real-time event).*$gdb_prompt $" {
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# It would be nice if we could catch the message that GDB prints
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# when it first notices that the thread library doesn't support
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# debugging, or if we could explicitly ask GDB somehow.
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unsupported "This GDB does not support threads on this system."
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return -1
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}
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-re "$gdb_prompt $" {
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}
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timeout {
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fail "(timeout) create philosopher: $i"
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}
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}
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if { $threads_created == 0 } {
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# Not all targets announce new threads as they are created.
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# For example, the GDB
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# remote protocol target only finds out about threads when
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# they actually report some event like a breakpoint hit,
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# or when the user types 'info threads'.
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unsupported "create philosopher: $i"
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} elseif { $threads_created == 1 } {
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if { $expect_manager < 0 } {
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set expect_manager 0
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}
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pass "create philosopher: $i"
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} elseif { !$i && $threads_created == 2 } {
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# Two threads are created the first time in LinuxThreads,
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# where the second is the manager thread. In NPTL, there is none.
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set expect_manager 1
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pass "create philosopher: $i"
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} else {
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fail "create philosopher: $i"
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}
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send_gdb "info threads\n"
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set threads_after {}
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gdb_expect {
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-re "info threads\r\n" {
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exp_continue
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}
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-re "^. +(\[0-9\]+ Thread \[-0-9a-fx\]+) \[^\n\]*\n" {
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set name $expect_out(1,string)
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for {set j 0} {$j != [llength $threads_before] } {incr j} {
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if {$name == [lindex $threads_before $j]} {
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set threads_before [lreplace $threads_before $j $j]
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set name ""
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break
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}
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}
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if { $name != "" } {
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lappend threads_after $name
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}
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exp_continue
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}
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-re "^\[^\n\]*\n" {
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verbose -log "skipping line" 2
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}
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-re "^$gdb_prompt $" {
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if { [llength $threads_before] != 0 } {
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fail "info threads after: $i"
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} elseif { !$i && [llength $threads_after] == 2 } {
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set expect_manager 1
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pass "info threads after: $i"
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} elseif { [llength $threads_after] == 1 } {
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if { $expect_manager < 0 } {
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set expect_manager 0
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}
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pass "info threads after: $i"
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} else {
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fail "info threads after: $i"
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}
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}
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timeout {
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fail "(timeout) info threads after: $i"
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}
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}
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}
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set nthreads 6
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# Run until there are some threads.
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gdb_breakpoint [gdb_get_line_number "linuxthreads.exp: info threads 2"]
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gdb_continue_to_breakpoint "main thread's sleep"
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set info_threads_ptn ""
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for {set i $nthreads} {$i > 0} {incr i -1} {
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append info_threads_ptn "$i Thread .*"
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}
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append info_threads_ptn "\[\r\n\]+$gdb_prompt $"
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set info_threads_manager_ptn "[expr $nthreads + 1] Thread .*$info_threads_ptn"
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gdb_test_multiple "info threads" "info threads 2" {
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-re "$info_threads_manager_ptn" {
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# We did see a manager thread. Check that against what we expected.
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switch -exact -- $expect_manager {
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-1 {
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# We weren't sure whether to expect a manager thread.
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pass "info threads 2"
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}
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1 {
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# We were expecting a manager thread.
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pass "info threads 2"
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}
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0 {
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# We were not expecting to see the manager thread.
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fail "info threads 2"
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}
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}
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set expect_manager 1
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incr nthreads
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}
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-re "$info_threads_ptn" {
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# We did not see a manager thread. Check that against what we
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# expected.
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switch -exact -- $expect_manager {
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-1 {
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# We weren't sure whether to expect a manager thread.
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# Don't expect it from here on out.
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pass "info threads 2"
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}
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1 {
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# We were expecting a manager thread, but we didn't see one.
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fail "info threads 2"
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}
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0 {
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# We were not expecting to see the manager thread.
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pass "info threads 2"
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}
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}
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set expect_manager 0
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}
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}
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# Try setting a thread-specific breakpoint.
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gdb_breakpoint "print_philosopher thread 5"
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gdb_continue_to_breakpoint "thread 5's print"
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# When there is no debugging info available for the thread library,
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# the backtrace entry for philosopher's caller looks like:
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# #1 0x4001c548 in pthread_create () from /lib/libpthread.so.0
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# If you do have debug info, the output obviously depends more on the
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# exact library in use; under NPTL, you get:
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# #2 0x0012b7fc in start_thread (arg=0x21) at pthread_create.c:264
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gdb_test "where" "print_philosopher.*philosopher.* \(from .*libpthread\|at pthread_create\).*" \
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"first thread-specific breakpoint hit"
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# Make sure it's catching the right thread. Try hitting the
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# breakpoint ten times, and make sure we don't get anyone else.
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set only_five 1
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for {set i 0} {$only_five > 0 && $i < 10} {incr i} {
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gdb_continue_to_breakpoint "thread 5's print, pass: $i"
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send_gdb "info threads\n"
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gdb_expect {
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-re "\\* 5 Thread .* print_philosopher .*\r\n$gdb_prompt $" {
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# Okay this time.
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}
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-re ".*$gdb_prompt $" {
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set only_five 0
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}
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timeout {
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set only_five -1
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}
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}
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}
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set name "thread-specific breakpoint is thread-specific"
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if {$only_five == 1} { pass $name }
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if {$only_five == 0} { fail $name }
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if {$only_five == -1} { fail "$name (timeout)" }
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### Select a particular thread.
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proc select_thread {thread} {
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global gdb_prompt
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send_gdb "thread $thread\n"
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gdb_expect {
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-re "\\\[Switching to thread .*\\\].*\r\n$gdb_prompt $" {
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pass "selected thread: $thread"
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}
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-re "$gdb_prompt $" {
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fail "selected thread: $thread"
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}
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timeout {
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fail "selected thread: $thread (timeout)"
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}
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}
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}
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### Select THREAD, check for a plausible backtrace, and make sure
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### we're actually selecting a different philosopher each time.
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### Return true if the thread had a stack which was not only
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### acceptable, but interesting. SEEN should be an array in which
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### SEEN(N) exists iff we have found philosopher number N before.
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set main_seen 0
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set manager_seen 0
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proc check_philosopher_stack {thread seen_name} {
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global gdb_prompt
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upvar $seen_name seen
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global main_seen
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global expect_manager manager_seen
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set name "philosopher is distinct: $thread"
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set interesting 0
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select_thread $thread
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send_gdb "where\n"
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gdb_expect {
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-re ".* in philosopher \\(data=(0x\[0-9a-f\]+).*\r\n$gdb_prompt $" {
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set data $expect_out(1,string)
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if {[info exists seen($data)]} {
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fail $name
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} else {
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pass $name
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set seen($data) yep
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}
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set interesting 1
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}
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-re ".* in __pthread_manager \\(.*$gdb_prompt $" {
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if {$manager_seen == 1} {
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fail "manager thread is distinct: $thread"
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} else {
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set manager_seen 1
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pass "manager thread is distinct: $thread"
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}
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set interesting 1
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}
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-re "pthread_start_thread.*\r\n$gdb_prompt $" {
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## Maybe the thread hasn't started yet.
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pass $name
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}
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-re ".* in main \\(.*$gdb_prompt $" {
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if {$main_seen == 1} {
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fail "main is distinct: $thread"
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} else {
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set main_seen 1
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pass "main is distinct: $thread"
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}
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set interesting 1
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}
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-re " in \\?\\?.*\r\n$gdb_prompt $" {
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## Sometimes we can't get a backtrace. I'm going to call
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## this a pass, since we do verify that at least one
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## thread was interesting, so we can get more consistent
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## test suite totals. But in my heart, I think it should
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## be an xfail.
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pass $name
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}
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-re "$gdb_prompt $" {
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fail $name
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}
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timeout {
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fail "$name (timeout)"
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}
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}
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return $interesting
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}
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set any_interesting 0
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array set seen {}
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unset seen
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for {set i 1} {$i <= $nthreads} {incr i} {
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if [check_philosopher_stack $i seen] {
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set any_interesting 1
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}
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}
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if {$any_interesting} {
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pass "found an interesting thread"
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} else {
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fail "found an interesting thread"
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}
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if {$manager_seen == $expect_manager} {
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pass "manager thread found (not found) when expected"
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} else {
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fail "manager thread found (not found) when expected"
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}
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