218 lines
6.7 KiB
Plaintext
218 lines
6.7 KiB
Plaintext
# Copyright 2005-2013 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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#
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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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#
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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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if { [is_remote target] || ![isnative] } then {
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continue
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}
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# Until "set follow-fork-mode" and "catch fork" are implemented on
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# other targets...
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#
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if {![istarget "hppa*-hp-hpux*"] && ![istarget "*-*-linux*"]} then {
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continue
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}
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set testfile "multi-forks"
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set srcfile ${testfile}.c
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set binfile ${objdir}/${subdir}/${testfile}
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if { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug}] != "" } {
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untested multi-forks.exp
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return -1
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}
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# Start with a fresh gdb
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gdb_exit
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gdb_start
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gdb_reinitialize_dir $srcdir/$subdir
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gdb_load ${binfile}
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global gdb_prompt
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# This is a test of gdb's ability to follow the parent, child or both
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# parent and child of multiple Unix fork() system calls.
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set exit_bp_loc [gdb_get_line_number "Set exit breakpoint here."]
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# Insert a breakpoint at the location provided by the exit_bp_loc global
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# and resume the execution until hitting that breakpoint. We also make
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# sure to consume all the expected output from all processes as well,
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# to make sure it doesn't cause trouble during a subsequent test.
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proc continue_to_exit_bp_loc {} {
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global exit_bp_loc decimal gdb_prompt
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gdb_breakpoint $exit_bp_loc
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send_gdb "continue\n"
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# The output from the child processes can be interleaved arbitrarily
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# with the output from GDB and the parent process. If we don't
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# consume it all now, it can confuse later interactions.
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set seen_done 0
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set seen_break 0
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set seen_prompt 0
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set seen_timeout 0
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while { ($seen_done < 16 || ! $seen_prompt) && ! $seen_timeout } {
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# We don't know what order the interesting things will arrive in.
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# Using a pattern of the form 'x|y|z' instead of -re x ... -re y
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# ... -re z ensures that expect always chooses the match that
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# occurs leftmost in the input, and not the pattern appearing
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# first in the script that occurs anywhere in the input, so that
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# we don't skip anything.
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gdb_expect {
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-re "($decimal done)|(Breakpoint)|($gdb_prompt)" {
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if {[info exists expect_out(1,string)]} {
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incr seen_done
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} elseif {[info exists expect_out(2,string)]} {
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set seen_break 1
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} elseif {[info exists expect_out(3,string)]} {
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set seen_prompt 1
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}
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array unset expect_out
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}
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timeout { set seen_timeout 1 }
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}
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}
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if { $seen_timeout } {
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fail "run to exit 2 (timeout)"
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} elseif { ! $seen_prompt } {
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fail "run to exit 2 (no prompt)"
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} elseif { ! $seen_break } {
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fail "run to exit 2 (no breakpoint hit)"
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} elseif { $seen_done != 16 } {
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fail "run to exit 2 (missing done messages)"
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} else {
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pass "run to exit 2"
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}
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}
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# The inferior program builds a tree of processes by executing a loop
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# four times, calling fork at each iteration. Thus, at each
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# iteration, the total number of processes doubles; after four
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# iterations, we have 16 processes. Each process saves the results
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# from its 'fork' calls, so we can tell which leaf a given process is
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# by looking at which forks returned zero and which returned a pid: a
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# zero means to take the child's branch; a pid means to take the
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# parent's branch.
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# First set gdb to follow the child.
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# The result should be that each of the 4 forks returns zero.
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runto_main
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gdb_test_no_output "set follow-fork child"
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continue_to_exit_bp_loc
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gdb_test "print pids" "\\$.* = \\{0, 0, 0, 0\\}.*" "follow child, print pids"
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# Now set gdb to follow the parent.
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# Result should be that none of the 4 forks returns zero.
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runto_main
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gdb_test_no_output "set follow-fork parent" ""
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continue_to_exit_bp_loc
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gdb_test "print pids\[0\]==0 || pids\[1\]==0 || pids\[2\]==0 || pids\[3\]==0" \
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" = 0" "follow parent, print pids"
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#
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# Now test with detach-on-fork off.
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#
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# detach-on-fork isn't implemented on hpux.
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#
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if {![istarget "*-*-linux*"]} then {
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continue
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}
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# Start with a fresh gdb
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gdb_exit
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gdb_start
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gdb_reinitialize_dir $srcdir/$subdir
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gdb_load ${binfile}
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runto_main
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gdb_breakpoint $exit_bp_loc
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gdb_test "help set detach-on-fork" "whether gdb will detach the child.*" \
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"help set detach"
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gdb_test "show detach-on-fork" "on." "show detach default on"
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gdb_test_no_output "set detach off" "set detach off"
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#
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# We will now run every fork up to the exit bp,
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# eventually winding up with 16 inferiors.
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#
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for {set i 1} {$i <= 15} {incr i} {
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gdb_test "continue" "Breakpoint .* main .*exit.*" "Run to exit $i"
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gdb_test "info inferior" " 5 .* 4 .* 3 .* 2 .*" "info inferior $i"
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gdb_test "inferior $i + 1" "(_dl_sysinfo_int80|fork|__kernel_(v|)syscall).*" \
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"inferior $i"
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}
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gdb_test "continue" "Breakpoint .* main .*exit.*" "Run to exit 16"
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gdb_test "info inferiors" " 5 .* 4 .* 3 .* 2 .*" "info inferior 16"
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gdb_test "inferior 2" " main .*" "restart final"
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#
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# Now we should examine all the pids.
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#
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#
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# Test detach inferior
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#
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# [assumes we're at #1]
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gdb_test "detach inferior 2" "Detaching .*" "Detach 2"
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gdb_test "detach inferior 3" "Detaching .*" "Detach 3"
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gdb_test "detach inferior 4" "Detaching .*" "Detach 4"
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gdb_test "detach inferior 5" "Detaching .*" "Detach 5"
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#
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# Test kill inferior
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#
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gdb_test_no_output "kill inferior 6" "Kill 6"
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gdb_test "info inferior 6" "<null>.*" "Did kill 6"
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gdb_test_no_output "kill inferior 7" "Kill 7"
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gdb_test "info inferior 7" "<null>.*" "Did kill 7"
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gdb_test_no_output "kill inferior 8" "Kill 8"
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gdb_test "info inferior 8" "<null>.*" "Did kill 8"
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gdb_test_no_output "kill inferior 9" "Kill 9"
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gdb_test "info inferior 9" "<null>.*" "Did kill 9"
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gdb_test_no_output "kill inferior 10" "Kill 10"
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gdb_test "info inferior 10" "<null>.*" "Did kill 10"
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gdb_test_no_output "kill inferior 11" "Kill 11"
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gdb_test "info inferior 11" "<null>.*" "Did kill 11"
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gdb_test_no_output "kill inferior 12" "Kill 12"
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gdb_test "info inferior 12" "<null>.*" "Did kill 12"
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gdb_test_no_output "kill inferior 13" "Kill 13"
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gdb_test "info inferior 13" "<null>.*" "Did kill 13"
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gdb_test_no_output "kill inferior 14" "Kill 14"
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gdb_test "info inferior 14" "<null>.*" "Did kill 14"
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gdb_test_no_output "kill inferior 15" "Kill 15"
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gdb_test "info inferior 15" "<null>.*" "Did kill 15"
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gdb_test_no_output "kill inferior 16" "Kill 16"
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gdb_test "info inferior 16" "<null>.*" "Did kill 16"
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return 0
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