2012-11-02 Pedro Alves <palves@redhat.com>
* gdb.base/foll-vfork-exit.c: New file. * gdb.base/foll-vfork.exp (top level): New file-describing comment. (vfork_child_follow_to_exit): New procedure. (tcatch_vfork_then_child_follow): Rename as ... (tcatch_vfork_then_child_follow_exec): ... this. (tcatch_vfork_then_child_follow_exit): New procedure. (do_vfork_and_follow_parent_tests): New procedure, factored out from do_vfork_and_exec_tests. (do_vfork_and_follow_child_tests_exec): Ditto. (do_vfork_and_exec_tests): Delete. (do_vfork_and_follow_child_tests_exit): New procedure. (top level): Run tests with both the program that has the vfork child execing, and the program has the vfork child exiting.
This commit is contained in:
Pedro Alves
parent
1e35b1a94e
commit
71ce889da9
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@ -1,3 +1,20 @@
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2012-11-02 Pedro Alves <palves@redhat.com>
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* gdb.base/foll-vfork-exit.c: New file.
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* gdb.base/foll-vfork.exp (top level): New file-describing
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comment.
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(vfork_child_follow_to_exit): New procedure.
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(tcatch_vfork_then_child_follow): Rename as ...
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(tcatch_vfork_then_child_follow_exec): ... this.
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(tcatch_vfork_then_child_follow_exit): New procedure.
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(do_vfork_and_follow_parent_tests): New procedure, factored out
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from do_vfork_and_exec_tests.
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(do_vfork_and_follow_child_tests_exec): Ditto.
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(do_vfork_and_exec_tests): Delete.
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(do_vfork_and_follow_child_tests_exit): New procedure.
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(top level): Run tests with both the program that has the vfork
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child execing, and the program has the vfork child exiting.
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2012-11-02 Pedro Alves <palves@redhat.com>
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* gdb.base/foll-vfork.exp (setup_gdb): New procedure.
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@ -0,0 +1,38 @@
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/* This testcase is part of GDB, the GNU debugger.
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Copyright 1997, 1999, 2007-2012 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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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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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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#include <stdio.h>
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#include <unistd.h>
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int
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main ()
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{
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int pid;
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pid = vfork ();
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if (pid == 0)
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{
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printf ("I'm the child!\n");
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_exit (0);
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}
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else
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{
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printf ("I'm the proud parent of child #%d!\n", pid);
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}
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return 0;
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}
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@ -13,6 +13,11 @@
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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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# Various tests of gdb's ability to follow the parent or child of a
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# Unix vfork system call. A vfork parent is blocked until the child
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# either execs or exits --- since those events take somewhat different
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# code paths in GDB, both variants are exercised.
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if { [is_remote target] || ![isnative] } then {
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continue
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}
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@ -148,6 +153,31 @@ proc vfork_parent_follow_to_bp {} {
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exec sleep 1
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}}
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proc vfork_child_follow_to_exit {} {
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with_test_prefix "vfork child follow, to exit" {
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global gdb_prompt
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setup_gdb
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gdb_test_no_output "set follow-fork child"
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set test "continue to child exit"
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gdb_test_multiple "continue" $test {
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-re "Couldn't get registers.*$gdb_prompt " {
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setup_kfail "gdb/14766" *-*-*
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fail "$test"
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}
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-re "Attaching after.* vfork to.*Detaching vfork parent .* after child exit.*$gdb_prompt " {
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pass $test
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}
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}
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# The parent has been detached; allow time for any output it might
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# generate to arrive, so that output doesn't get confused with
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# any gdb_expected debugger output from a subsequent testpoint.
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#
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exec sleep 1
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}}
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proc vfork_and_exec_child_follow_to_main_bp {} {
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with_test_prefix "vfork and exec child follow, to main bp" {
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global gdb_prompt
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@ -267,7 +297,7 @@ proc tcatch_vfork_then_parent_follow {} {
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exec sleep 1
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}}
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proc tcatch_vfork_then_child_follow {} {
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proc tcatch_vfork_then_child_follow_exec {} {
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with_test_prefix "vfork child follow, finish after tcatch vfork" {
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global gdb_prompt
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global srcfile
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@ -314,12 +344,56 @@ proc tcatch_vfork_then_child_follow {} {
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exec sleep 1
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}}
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proc do_vfork_and_exec_tests {} {
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proc tcatch_vfork_then_child_follow_exit {} {
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with_test_prefix "vfork child follow, finish after tcatch vfork" {
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global gdb_prompt
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global srcfile
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# Check that vfork catchpoints are supported, as an indicator for whether
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# vfork-following is supported.
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check_vfork_catchpoints
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setup_gdb
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gdb_test_no_output "set follow-fork child"
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gdb_test "tcatch vfork" "Catchpoint .*(vfork).*"
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# HP-UX 10.20 seems to stop you in "vfork", while more recent HP-UXs
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# stop you in "_vfork".
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set test "continue to vfork"
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gdb_test_multiple "continue" $test {
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-re "vfork \\(\\) at .*$gdb_prompt $" {
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pass $test
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}
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-re "0x\[0-9a-fA-F\]*.*(vfork|__kernel_v?syscall).*$gdb_prompt " {
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pass $test
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}
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}
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set test "finish"
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gdb_test_multiple "finish" $test {
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-re "Couldn't get registers.*$gdb_prompt " {
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setup_kfail "gdb/14766" *-*-*
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fail "$test "
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}
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-re "Run till exit from.*vfork.*exited normally.*$gdb_prompt " {
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setup_kfail "gdb/14762" *-*-*
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fail $test
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}
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-re "Run till exit from.*vfork.*pid = vfork \\(\\).*$gdb_prompt " {
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pass $test
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}
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-re "Run till exit from.*__kernel_v?syscall.*0x\[0-9a-fA-F\]* in vfork .*$gdb_prompt " {
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send_gdb "finish\n"
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exp_continue
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}
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}
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# The parent has been detached; allow time for any output it might
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# generate to arrive, so that output doesn't get confused with
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# any expected debugger output from a subsequent testpoint.
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#
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exec sleep 1
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}}
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proc do_vfork_and_follow_parent_tests {} {
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global gdb_prompt
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# Try following the parent process by stepping through a call to
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# vfork. Do this without catchpoints.
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@ -330,6 +404,12 @@ proc do_vfork_and_exec_tests {} {
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# without catchpoints.
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vfork_parent_follow_to_bp
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# Try catching a vfork, and stepping out to the parent.
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#
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tcatch_vfork_then_parent_follow
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}
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proc do_vfork_and_follow_child_tests_exec {} {
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# Try following the child process by just continuing through the
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# vfork, and letting the parent's breakpoint on "main" be auto-
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# magically reset in the child.
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@ -345,13 +425,9 @@ proc do_vfork_and_exec_tests {} {
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#
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vfork_and_exec_child_follow_through_step
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# Try catching a vfork, and stepping out to the parent.
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#
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tcatch_vfork_then_parent_follow
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# Try catching a vfork, and stepping out to the child.
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#
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tcatch_vfork_then_child_follow
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tcatch_vfork_then_child_follow_exec
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# Test the ability to follow both child and parent of a vfork. Do
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# this without catchpoints.
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@ -365,11 +441,60 @@ proc do_vfork_and_exec_tests {} {
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#
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}
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# This is a test of gdb's ability to follow the parent or child
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# of a Unix vfork() system call. (The child will subsequently
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# call a variant of a Unix exec() system call.)
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#
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do_vfork_and_exec_tests
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proc do_vfork_and_follow_child_tests_exit {} {
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# Try following the child process by just continuing through the
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# vfork, and letting the child exit.
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#
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vfork_child_follow_to_exit
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# Try catching a vfork, and stepping out to the child.
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#
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tcatch_vfork_then_child_follow_exit
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}
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with_test_prefix "check vfork support" {
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# Check that vfork catchpoints are supported, as an indicator for
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# whether vfork-following is supported.
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check_vfork_catchpoints
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}
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# Follow parent and follow child vfork tests with a child that execs.
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with_test_prefix "exec" {
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# These are tests of gdb's ability to follow the parent of a Unix
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# vfork system call. The child will subsequently call a variant
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# of the Unix exec system call.
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do_vfork_and_follow_parent_tests
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# These are tests of gdb's ability to follow the child of a Unix
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# vfork system call. The child will subsequently call a variant
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# of a Unix exec system call.
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#
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do_vfork_and_follow_child_tests_exec
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}
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# Switch to test the case of the child exiting. We can't use
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# standard_testfile here because we don't want to overwrite the binary
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# of the previous tests.
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set testfile "foll-vfork-exit"
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set srcfile ${testfile}.c
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set binfile [standard_output_file ${testfile}]
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if {[build_executable $testfile.exp $testfile $srcfile] == -1} {
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untested "failed to build $testfile"
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return
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}
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# Follow parent and follow child vfork tests with a child that exits.
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with_test_prefix "exit" {
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# These are tests of gdb's ability to follow the parent of a Unix
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# vfork system call. The child will subsequently exit.
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do_vfork_and_follow_parent_tests
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# These are tests of gdb's ability to follow the child of a Unix
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# vfork system call. The child will subsequently exit.
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#
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do_vfork_and_follow_child_tests_exit
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}
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set timeout $oldtimeout
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return 0
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