From 8b923272a9c7288abb6ceefaa9ecd8353087d23f Mon Sep 17 00:00:00 2001 From: Joel Brobecker Date: Wed, 19 May 2004 21:41:03 +0000 Subject: [PATCH] * gdb.threads/pthread_cond_wait.c: New file. * gdb.threads/pthread_cond_wait.exp: New testcase. --- gdb/testsuite/ChangeLog | 6 ++ gdb/testsuite/gdb.threads/pthread_cond_wait.c | 76 +++++++++++++++++++ .../gdb.threads/pthread_cond_wait.exp | 73 ++++++++++++++++++ 3 files changed, 155 insertions(+) create mode 100644 gdb/testsuite/gdb.threads/pthread_cond_wait.c create mode 100644 gdb/testsuite/gdb.threads/pthread_cond_wait.exp diff --git a/gdb/testsuite/ChangeLog b/gdb/testsuite/ChangeLog index 683fa4e48b6..9d528417a84 100644 --- a/gdb/testsuite/ChangeLog +++ b/gdb/testsuite/ChangeLog @@ -1,3 +1,9 @@ +2004-05-19 J. Brobecker + Michael Snyder + + * gdb.threads/pthread_cond_wait.c: New file. + * gdb.threads/pthread_cond_wait.exp: New testcase. + 2004-05-13 Andrew Cagney * gdb.base/signull.exp, gdb.base/signull.c: New files. diff --git a/gdb/testsuite/gdb.threads/pthread_cond_wait.c b/gdb/testsuite/gdb.threads/pthread_cond_wait.c new file mode 100644 index 00000000000..ae87f8cb765 --- /dev/null +++ b/gdb/testsuite/gdb.threads/pthread_cond_wait.c @@ -0,0 +1,76 @@ +/* A small multi-threaded test case. + + Copyright 2004 + Free Software Foundation, Inc. + + This file is part of GDB. + + 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 2 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, write to the Free Software + Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +#include +#include +#include + +void +cond_wait (pthread_cond_t *cond, pthread_mutex_t *mut) +{ + pthread_mutex_lock(mut); + pthread_cond_wait (cond, mut); + pthread_mutex_unlock (mut); +} + +void +noreturn (void) +{ + pthread_mutex_t mut; + pthread_cond_t cond; + + pthread_mutex_init (&mut, NULL); + pthread_cond_init (&cond, NULL); + + /* Wait for a condition that will never be signaled, so we effectively + block the thread here. */ + cond_wait (&cond, &mut); +} + +void * +forever_pthread (void *unused) +{ + noreturn (); +} + +void +break_me (void) +{ + /* Just an anchor to help putting a breakpoint. */ +} + +int +main (void) +{ + pthread_t forever; + const struct timespec ts = { 0, 10000000 }; /* 0.01 sec */ + + pthread_create (&forever, NULL, forever_pthread, NULL); + for (;;) + { + nanosleep (&ts, NULL); + break_me(); + } + + return 0; +} + diff --git a/gdb/testsuite/gdb.threads/pthread_cond_wait.exp b/gdb/testsuite/gdb.threads/pthread_cond_wait.exp new file mode 100644 index 00000000000..72ae03a0cd9 --- /dev/null +++ b/gdb/testsuite/gdb.threads/pthread_cond_wait.exp @@ -0,0 +1,73 @@ +# Copyright (C) 2004 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 2 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, write to the Free Software +# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + +# Please email any bugs, comments, and/or additions to this file to: +# bug-gdb@gnu.org + +# This file verifies that GDB is able to compute a backtrace for a thread +# being blocked on a call to pthread_cond_wait(). + +if $tracelevel then { + strace $tracelevel +} + +set testfile "pthread_cond_wait" +set srcfile ${testfile}.c +set binfile ${objdir}/${subdir}/${testfile} + +if {[gdb_compile_pthreads "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable [list debug "incdir=${objdir}"]] != "" } { + return -1 +} + +gdb_exit +gdb_start +gdb_reinitialize_dir $srcdir/$subdir +gdb_load ${binfile} + +gdb_test "break break_me" \ + "Breakpoint 1 at .*: file .*${srcfile}, line .*" \ + "breakpoint on break_me" + +gdb_test "run" \ + ".*Breakpoint 1, break_me ().*" \ + "run to break_me" + +# +# Backtrace all threads, find the one running noreturn, and +# verify that we are able to get a sensible backtrace, including +# the frame for the pthread_cond_wait() call. +# +# The string below will only match if the functions named +# occur in a single thread's backtrace, in the given order. +# + +global hex +global decimal + +# +# This is a "backtrace break" ("btb"): +# +set btb "\[^\r\n\]+\[\r\n\]+\#${decimal}\[ \t\]+${hex} in " + +# One of the threads is blocked on a call to pthread_cond_wait, and +# we want to verify that we are able to get a sensible backtrace for +# that thread. Because we don't know its thread ID, we can't switch +# to it before doing the backtrace. So we get a backtrace for all +# threads, and verify that one them returns the expected backtrace. +gdb_test "thread apply all backtrace" \ + "pthread_cond_wait${btb}cond_wait${btb}noreturn${btb}forever_pthread.*" \ + "backtrace in blocked thread" + -- 2.30.2