-# Copyright 2005, 2006 Free Software Foundation, Inc.
+# Copyright 2005-2020 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
+# the Free Software Foundation; either version 3 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.
-
-if $tracelevel then {
- strace $tracelevel
- }
-
-if { ![isnative] } then {
- continue
-}
+# along with this program. If not, see <http://www.gnu.org/licenses/>.
# Until "set follow-fork-mode" and "catch fork" are implemented on
# other targets...
#
-if {![istarget "hppa*-hp-hpux*"] && ![istarget "*-*-linux*"]} then {
+if { ![istarget "*-*-linux*"] } then {
continue
}
-set prms_id 0
-set bug_id 0
-set testfile "multi-forks"
-set srcfile ${testfile}.c
-set binfile ${objdir}/${subdir}/${testfile}
+standard_testfile .c
if { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug}] != "" } {
- untested multi-forks.exp
+ untested "failed to compile"
return -1
}
# Start with a fresh gdb
-gdb_exit
-gdb_start
-gdb_reinitialize_dir $srcdir/$subdir
-gdb_load ${binfile}
+clean_restart ${binfile}
global gdb_prompt
# This is a test of gdb's ability to follow the parent, child or both
# parent and child of multiple Unix fork() system calls.
-#
-# Inferior program calls fork 4 times. Since each fork
-# calls fork 4 times, there will be 16 forks. Each fork
-# saves the return values of its own 4 fork calls.
+set exit_bp_loc [gdb_get_line_number "Set exit breakpoint here."]
+
+# Insert a breakpoint at the location provided by the exit_bp_loc global
+# and resume the execution until hitting that breakpoint. We also make
+# sure to consume all the expected output from all processes as well,
+# to make sure it doesn't cause trouble during a subsequent test.
+
+proc continue_to_exit_bp_loc {} {
+ global exit_bp_loc decimal gdb_prompt
+ global inferior_spawn_id gdb_spawn_id
+
+ gdb_breakpoint $exit_bp_loc
+
+ send_gdb "continue\n"
+
+ # The output from the child processes can be interleaved arbitrarily
+ # with the output from GDB and the parent process. If we don't
+ # consume it all now, it can confuse later interactions.
+ set seen_done 0
+ set seen_break 0
+ set seen_prompt 0
+ set seen_timeout 0
+ while { ($seen_done < 16 || ! $seen_prompt) && ! $seen_timeout } {
+ # We don't know what order the interesting things will arrive in.
+ # Using a pattern of the form 'x|y|z' instead of -re x ... -re y
+ # ... -re z ensures that expect always chooses the match that
+ # occurs leftmost in the input, and not the pattern appearing
+ # first in the script that occurs anywhere in the input, so that
+ # we don't skip anything.
+ gdb_expect {
+ -i "$inferior_spawn_id $gdb_spawn_id"
+ -re "($decimal done)|(Breakpoint)|($gdb_prompt)" {
+ if {[info exists expect_out(1,string)]} {
+ incr seen_done
+ } elseif {[info exists expect_out(2,string)]} {
+ set seen_break 1
+ } elseif {[info exists expect_out(3,string)]} {
+ set seen_prompt 1
+ }
+ array unset expect_out
+ }
+ timeout { set seen_timeout 1 }
+ }
+ }
+
+ if { $seen_timeout } {
+ fail "run to exit 2 (timeout)"
+ } elseif { ! $seen_prompt } {
+ fail "run to exit 2 (no prompt)"
+ } elseif { ! $seen_break } {
+ fail "run to exit 2 (no breakpoint hit)"
+ } elseif { $seen_done != 16 } {
+ fail "run to exit 2 (missing done messages)"
+ } else {
+ pass "run to exit 2"
+ }
+}
+
+# The inferior program builds a tree of processes by executing a loop
+# four times, calling fork at each iteration. Thus, at each
+# iteration, the total number of processes doubles; after four
+# iterations, we have 16 processes. Each process saves the results
+# from its 'fork' calls, so we can tell which leaf a given process is
+# by looking at which forks returned zero and which returned a pid: a
+# zero means to take the child's branch; a pid means to take the
+# parent's branch.
# First set gdb to follow the child.
# The result should be that each of the 4 forks returns zero.
+clean_restart ${binfile}
runto_main
-set exit_bp_loc [gdb_get_line_number "Set exit breakpoint here."]
-gdb_test "break $exit_bp_loc" "Breakpoint.* at .*" "Break at exit"
-gdb_test "set follow child" "" ""
-
-send_gdb "continue\n"
-gdb_expect {
- -re ".*Break.* main .*$gdb_prompt.*$" {}
- -re ".*$gdb_prompt $" {fail "run to exit 1"}
- default {fail "run to exit 1 (timeout)"}
-}
+gdb_test_no_output "set follow-fork child"
+continue_to_exit_bp_loc
gdb_test "print pids" "\\$.* = \\{0, 0, 0, 0\\}.*" "follow child, print pids"
# Now set gdb to follow the parent.
# Result should be that none of the 4 forks returns zero.
-delete_breakpoints
+clean_restart ${binfile}
runto_main
-gdb_test "break $exit_bp_loc" "Breakpoint.* at .*" "Break at exit"
-gdb_test "set follow parent" "" ""
-
-send_gdb "continue\n"
-gdb_expect {
- -re ".*Break.* main .*$gdb_prompt.*$" {}
- -re ".*$gdb_prompt $" {fail "run to exit 2"}
- default {fail "run to exit 2 (timeout)"}
-}
+gdb_test_no_output "set follow-fork parent" ""
+continue_to_exit_bp_loc
gdb_test "print pids\[0\]==0 || pids\[1\]==0 || pids\[2\]==0 || pids\[3\]==0" \
" = 0" "follow parent, print pids"
# Now test with detach-on-fork off.
#
+# Start with a fresh gdb
+
+clean_restart ${binfile}
+
runto_main
-gdb_test "break $exit_bp_loc" "Breakpoint.* at .*" ""
+gdb_breakpoint $exit_bp_loc
gdb_test "help set detach-on-fork" "whether gdb will detach the child.*" \
"help set detach"
gdb_test "show detach-on-fork" "on." "show detach default on"
-gdb_test "set detach off" "" "set detach off"
+gdb_test_no_output "set detach off" "set detach off"
#
# We will now run every fork up to the exit bp,
-# eventually winding up with 16 forks.
+# eventually winding up with 16 inferiors.
#
for {set i 1} {$i <= 15} {incr i} {
- gdb_test "continue" "Breakpoint .* main .*exit.*" "Run to exit $i"
- gdb_test "info fork" " 4 .* 3 .* 2 .* 1 .*" "info fork $i"
- gdb_test "restart $i" "(_dl_sysinfo_int80|fork|__kernel_vsyscall).*" \
- "restart $i"
+ gdb_test "continue" "Breakpoint .* main .*exit.*" "run to exit $i"
+ gdb_test "info inferior" " 2 .* 3 .* 4 .* 5 .*" "info inferior $i"
+ gdb_test "inferior $i + 1" "(_dl_sysinfo_int80|fork|__kernel_(v|)syscall).*" \
+ "inferior $i"
}
-gdb_test "continue" "Breakpoint .* main .*exit.*" "Run to exit 16"
-gdb_test "info fork" " 4 .* 3 .* 2 .* 1 .*" "info fork 16"
-gdb_test "restart 0" " main .*" "restart final"
+gdb_test "continue" "Breakpoint .* main .*exit.*" "run to exit 16"
+gdb_test "info inferior" " 2 .* 3 .* 4 .* 5 .*" "info inferior 16"
+gdb_test "inferior 2" " main .*" "restart final"
#
# Now we should examine all the pids.
#
#
-# Test detach fork
+# Test detach inferior
#
-# [assumes we're at #0]
-gdb_test "detach fork 1" "Detached .*" "Detach 1"
-gdb_test "detach fork 2" "Detached .*" "Detach 2"
-gdb_test "detach fork 3" "Detached .*" "Detach 3"
-gdb_test "detach fork 4" "Detached .*" "Detach 4"
+# [assumes we're at #1]
+gdb_test "detach inferior 2" "Detaching .*" "detach 2"
+gdb_test "detach inferior 3" "Detaching .*" "detach 3"
+gdb_test "detach inferior 4" "Detaching .*" "detach 4"
+gdb_test "detach inferior 5" "Detaching .*" "detach 5"
#
-# Test delete fork
-#
+# Test kill inferior
+#
-gdb_test "delete fork 5" "" "Delete 5"
-gdb_test "info fork 5" "No fork number 5." "Did delete 5"
-gdb_test "delete fork 6" "" "Delete 6"
-gdb_test "info fork 6" "No fork number 6." "Did delete 6"
-gdb_test "delete fork 7" "" "Delete 7"
-gdb_test "info fork 7" "No fork number 7." "Did delete 7"
-gdb_test "delete fork 8" "" "Delete 8"
-gdb_test "info fork 8" "No fork number 8." "Did delete 8"
-gdb_test "delete fork 9" "" "Delete 9"
-gdb_test "info fork 9" "No fork number 9." "Did delete 9"
-gdb_test "delete fork 10" "" "Delete 10"
-gdb_test "info fork 10" "No fork number 10." "Did delete 10"
-gdb_test "delete fork 11" "" "Delete 11"
-gdb_test "info fork 11" "No fork number 11." "Did delete 11"
-gdb_test "delete fork 12" "" "Delete 12"
-gdb_test "info fork 12" "No fork number 12." "Did delete 12"
-gdb_test "delete fork 13" "" "Delete 13"
-gdb_test "info fork 13" "No fork number 13." "Did delete 13"
-gdb_test "delete fork 14" "" "Delete 14"
-gdb_test "info fork 14" "No fork number 14." "Did delete 14"
-gdb_test "delete fork 15" "" "Delete 15"
-gdb_test "info fork 15" "No fork number 15." "Did delete 15"
+for {set i 6} { $i <= 16} {incr i} {
+ gdb_test_no_output "kill inferior $i" "kill $i"
+ gdb_test "info inferior $i" "<null>.*" "did kill $i"
+}
return 0
-
projects / thirdparty / binutils-gdb.git / blobdiff