[RFA]: test for backtrace failures in macro
Jeff Johnston
jjohnstn@redhat.com
Thu Nov 11 19:37:00 GMT 2004
Andrew Cagney wrote:
> Jeff Johnston wrote:
>
>> The following is a test for the change I recently made to allow macros
>> to continue operating even after a backtrace failure occurs.
>>
>> Tested on x86-linux with linuxthreads and ia64-linux with nptl threads.
>
>
> Can you think of an alternative to "macro" as the prefix? "macro" can
> also refer to:
>
> #define MACRO
>
> (If I new of one, I'd suggest it :-) With a better name, ok.
>
Will rename to threadapply.exp and threadapply.c
-- Jeff J.
> Andrew
>
>> 2004-11-05 Jeff Johnston <jjohnstn@redhat.com>
>>
>> * gdb.threads/macrothreads.exp: New test.
>> * gdb.threads/macrothreads.c: New file.
>>
>>
>> ------------------------------------------------------------------------
>>
>> Index: gdb.threads/macrothreads.c
>> ===================================================================
>> RCS file: gdb.threads/macrothreads.c
>> diff -N gdb.threads/macrothreads.c
>> --- /dev/null 1 Jan 1970 00:00:00 -0000
>> +++ gdb.threads/macrothreads.c 5 Nov 2004 20:38:14 -0000
>> @@ -0,0 +1,82 @@
>> +/* This testcase is part of GDB, the GNU debugger.
>> +
>> + Copyright 2002, 2003, 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. + + This file is copied from
>> schedlock.c. */
>> +
>> +#include <stdio.h>
>> +#include <unistd.h>
>> +#include <stdlib.h>
>> +#include <pthread.h>
>> +
>> +void *thread_function(void *arg); /* Pointer to function executed by
>> each thread */
>> +
>> +#define NUM 5
>> +
>> +unsigned int args[NUM+1];
>> +
>> +int main() {
>> + int res;
>> + int all_started;
>> + pthread_t threads[NUM];
>> + void *thread_result;
>> + long i;
>> +
>> + for (i = 0; i < NUM; i++)
>> + {
>> + args[i] = 1; /* Init value. */
>> + res = pthread_create(&threads[i],
>> + NULL,
>> + thread_function,
>> + (void *) i);
>> + }
>> +
>> + all_started = 0;
>> + while (!all_started)
>> + {
>> + all_started = 1;
>> + for (i = 0; i < NUM; i++)
>> + {
>> + if (args[i] == 1)
>> + {
>> + all_started = 0;
>> + break;
>> + }
>> + } + }
>> +
>> + args[i] = 1;
>> + /* Break here */
>> + thread_function ((void *) i);
>> +
>> + exit(EXIT_SUCCESS);
>> +}
>> +
>> +void *thread_function(void *arg) {
>> + int my_number = (long) arg;
>> + int *myp = (int *) &args[my_number];
>> +
>> + /* Don't run forever. Run just short of it :) */
>> + while (*myp > 0)
>> + {
>> + (*myp) ++; /* Loop increment. */
>> + }
>> +
>> + pthread_exit(NULL);
>> +}
>> +
>> Index: gdb.threads/macrothreads.exp
>> ===================================================================
>> RCS file: gdb.threads/macrothreads.exp
>> diff -N gdb.threads/macrothreads.exp
>> --- /dev/null 1 Jan 1970 00:00:00 -0000
>> +++ gdb.threads/macrothreads.exp 5 Nov 2004 20:38:14 -0000
>> @@ -0,0 +1,76 @@
>> +# This testcase is part of GDB, the GNU debugger.
>> +
>> +# Copyright 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. +
>> +# Check that GDB can support multiple watchpoints across threads.
>> +
>> +if $tracelevel {
>> + strace $tracelevel
>> +}
>> +
>> +set prms_id 0
>> +set bug_id 0
>> +
>> +# This test verifies that a macro using backtrace can be applied to
>> all threads
>> +# and will continue for each thread even though an error may occur in
>> +# backtracing one of the threads.
>> +if [target_info exists gdb,no_hardware_watchpoints] {
>> + return 0;
>> +}
>> +
>> +set testfile "macrothreads"
>> +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}
>> +
>> +#
>> +# Run to `main' where we begin our tests.
>> +#
>> +
>> +if ![runto_main] then {
>> + gdb_suppress_tests
>> +}
>> +
>> +# Break after all threads have been started.
>> +set break_line [gdb_get_line_number "Break here"]
>> +gdb_test "b $break_line" ""
>> +gdb_test "continue"
>> +
>> +gdb_test_multiple "define backthread" "defining macro" {
>> + -re "Type commands for definition of \"backthread\".\r\nEnd with a
>> line saying just \"end\".\r\n>$" {
>> + gdb_test_multiple "bt\np\/x 20\nend\n" "macro details" {
>> + -re "$gdb_prompt $" {
>> + pass "macro details"
>> + }
>> + }
>> + pass "defining macro"
>> + }
>> +}
>> +
>> +# Cause backtraces to fail by setting a limit. This allows us to
>> +# verify that the macro can get past the backtrace error and perform
>> +# subsequent commands.
>> +gdb_test "set backtrace limit 3" ""
>> +gdb_test "thread apply all backthread" "Thread ..*\\\$1 =
>> 0x14.*Thread ..*\\\$2 = 0x14.*Thread ..*\\\$3 = 0x14.*Thread ..*\\\$4
>> = 0x14.*Thread ..*\\\$5 = 0x14.*Thread ..*\\\$. = 0x14"
>> +
>
>
>
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