309 lines
9.0 KiB
Plaintext
309 lines
9.0 KiB
Plaintext
# Copyright 1999, 2001, 2002, 2003 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 2 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, write to the Free Software
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# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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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 "next\n"
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gdb_expect {
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-re "\\\[New .*\\\].*\\\[New .*\\\].*$gdb_prompt $" {
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# Two threads are created the first time in LinuxThreads,
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# where the second is the manager thread. In NPTL, there is none.
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if {$i == 0} {
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set expect_manager 1
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}
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pass "create philosopher: $i"
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}
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-re "\\\[New .*\\\].*$gdb_prompt $" {
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if {$i == 0} {
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set expect_manager 0
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}
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pass "create philosopher: $i"
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}
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-re "Program received signal.*(Unknown signal|SIGUSR|Real-time event).*$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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# We used to fail here, but not all targets announce new
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# threads as they are created. 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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unresolved "create philosopher: $i"
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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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}
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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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