Index: gdb-7.6.50.20130731-cvs/gdb/testsuite/gdb.base/gcore-shmid0.exp =================================================================== --- /dev/null 1970-01-01 00:00:00.000000000 +0000 +++ gdb-7.6.50.20130731-cvs/gdb/testsuite/gdb.base/gcore-shmid0.exp 2013-08-02 22:24:04.747745133 +0200 @@ -0,0 +1,101 @@ +# Copyright 2007, 2009 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. + +# Test GDB's handling of gcore for mapping with a name but zero inode. + +if { [prepare_for_testing gcore-shmid0.exp gcore-shmid0] } { + return -1 +} + +# Does this gdb support gcore? +set test "help gcore" +gdb_test_multiple $test $test { + -re "Undefined command: .gcore.*$gdb_prompt $" { + # gcore command not supported -- nothing to test here. + unsupported "gdb does not support gcore on this target" + return -1; + } + -re "Save a core file .*$gdb_prompt $" { + pass $test + } +} + +if { ! [ runto_main ] } then { + untested gcore-shmid0.exp + return -1 +} + +gdb_breakpoint "initialized" +gdb_breakpoint "unresolved" + +set oldtimeout $timeout +set timeout [expr $oldtimeout + 120] + +set test "Continue to initialized." +gdb_test_multiple "continue" $test { + -re "Breakpoint .*, initialized .* at .*\r\n$gdb_prompt $" { + pass $test + } + -re "Breakpoint .*, unresolved .* at .*\r\n$gdb_prompt $" { + set timeout $oldtimeout + unsupported $test + return -1 + } +} +set timeout $oldtimeout + +set escapedfilename [string_to_regexp ${objdir}/${subdir}/gcore-shmid0.test] + +set test "save a corefile" +gdb_test_multiple "gcore ${objdir}/${subdir}/gcore-shmid0.test" $test { + -re "Saved corefile ${escapedfilename}\[\r\n\]+$gdb_prompt $" { + pass $test + } + -re "Can't create a corefile\[\r\n\]+$gdb_prompt $" { + unsupported $test + } +} + +# Be sure to remove the handle first. +# But it would get removed even on a kill by GDB as the handle is already +# deleted, just it is still attached. +gdb_continue_to_end "finish" + +set test "core-file command" +gdb_test_multiple "core-file $objdir/$subdir/gcore-shmid0.test" $test { + -re ".* program is being debugged already.*y or n. $" { + # gdb_load may connect us to a gdbserver. + send_gdb "y\n" + exp_continue; + } + -re "Core was generated by .*\r\n\#0 .*\\\(\\\).*\r\n$gdb_prompt $" { + # The filename does not fit there anyway so do not check it. + pass $test + } + -re ".*registers from core file: File in wrong format.* $" { + fail "core-file command (could not read registers from core file)" + } +} + +set test "backtrace" +gdb_test_multiple "bt" $test { + -re "#0 *initialized \\\(\\\) at .*#1 .* main \\\(.*$gdb_prompt $" { + pass $test + } + -re "#0 *initialized \\\(\\\) at .*Cannot access memory at address .*$gdb_prompt $" { + fail $test + } +} Index: gdb-7.6.50.20130731-cvs/gdb/testsuite/gdb.base/gcore-shmid0.c =================================================================== --- /dev/null 1970-01-01 00:00:00.000000000 +0000 +++ gdb-7.6.50.20130731-cvs/gdb/testsuite/gdb.base/gcore-shmid0.c 2013-08-02 22:22:17.573599496 +0200 @@ -0,0 +1,128 @@ +/* Copyright 2007, 2009 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. */ + +/* + * Test GDB's handling of gcore for mapping with a name but zero inode. + */ + +#include +#include +#include +#include +#include +#include +#include +#include + +/* The same test running in a parallel testsuite may steal us the zero SID, + even if we never get any EEXIST. Just try a while. */ + +#define TIMEOUT_SEC 10 + +static volatile int v; + +static void +initialized (void) +{ + v++; +} + +static void +unresolved (void) +{ + v++; +} + +int +main (void) +{ + int sid; + unsigned int *addr = (void *) -1L; + int attempt, round = 0; + time_t ts_start, ts; + + if (time (&ts_start) == (time_t) -1) + { + printf ("time (): %m\n"); + exit (1); + } + + /* The generated SID will cycle with an increment of 32768, attempt until it + * wraps to 0. */ + + for (attempt = 0; addr == (void *) -1L; attempt++) + { + /* kernel-2.6.25-8.fc9.x86_64 just never returns the value 0 by + shmget(2). shmget returns SID range 0..1<<31 in steps of 32768, + 0x1000 should be enough but wrap the range it to be sure. */ + + if (attempt > 0x21000) + { + if (time (&ts) == (time_t) -1) + { + printf ("time (): %m\n"); + exit (1); + } + + if (ts >= ts_start && ts < ts_start + TIMEOUT_SEC) + { + attempt = 0; + round++; + continue; + } + + printf ("Problem is not reproducible on this kernel (attempt %d, " + "round %d)\n", attempt, round); + unresolved (); + exit (1); + } + + sid = shmget ((key_t) rand (), 0x1000, IPC_CREAT | IPC_EXCL | 0777); + if (sid == -1) + { + if (errno == EEXIST) + continue; + + printf ("shmget (%d, 0x1000, IPC_CREAT): errno %d\n", 0, errno); + exit (1); + } + + /* Use SID only if it is 0, retry it otherwise. */ + + if (sid == 0) + { + addr = shmat (sid, NULL, SHM_RND); + if (addr == (void *) -1L) + { + printf ("shmat (%d, NULL, SHM_RND): errno %d\n", sid, + errno); + exit (1); + } + } + if (shmctl (sid, IPC_RMID, NULL) != 0) + { + printf ("shmctl (%d, IPC_RMID, NULL): errno %d\n", sid, errno); + exit (1); + } + } + + initialized (); + + return 0; +}