# Copyright 2005, 2006, 2007, 2008 Free Software Foundation, Inc.
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# Copyright 2005, 2006, 2007, 2008 Free Software Foundation, Inc.
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# This program is free software; you can redistribute it and/or modify
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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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# 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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# 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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# (at your option) any later version.
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#
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#
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# This program is distributed in the hope that it will be useful,
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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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# 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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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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# GNU General Public License for more details.
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#
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#
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# You should have received a copy of the GNU General Public License
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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 .
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# along with this program. If not, see .
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if $tracelevel then {
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if $tracelevel then {
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strace $tracelevel
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strace $tracelevel
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}
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}
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if { [is_remote target] || ![isnative] } then {
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if { [is_remote target] || ![isnative] } then {
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continue
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continue
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}
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}
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# Until "set follow-fork-mode" and "catch fork" are implemented on
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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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# other targets...
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#
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#
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if {![istarget "hppa*-hp-hpux*"] && ![istarget "*-*-linux*"]} then {
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if {![istarget "hppa*-hp-hpux*"] && ![istarget "*-*-linux*"]} then {
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continue
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continue
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}
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}
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set prms_id 0
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set prms_id 0
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set bug_id 0
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set bug_id 0
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set testfile "multi-forks"
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set testfile "multi-forks"
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set srcfile ${testfile}.c
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set srcfile ${testfile}.c
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set binfile ${objdir}/${subdir}/${testfile}
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set binfile ${objdir}/${subdir}/${testfile}
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if { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug}] != "" } {
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if { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug}] != "" } {
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untested multi-forks.exp
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untested multi-forks.exp
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return -1
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return -1
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}
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}
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# Start with a fresh gdb
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# Start with a fresh gdb
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gdb_exit
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gdb_exit
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gdb_start
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gdb_start
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gdb_reinitialize_dir $srcdir/$subdir
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gdb_reinitialize_dir $srcdir/$subdir
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gdb_load ${binfile}
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gdb_load ${binfile}
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global gdb_prompt
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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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# 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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# parent and child of multiple Unix fork() system calls.
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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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# 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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# 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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# 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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# 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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# 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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# 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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# 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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# parent's branch.
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# First set gdb to follow the child.
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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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# The result should be that each of the 4 forks returns zero.
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runto_main
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runto_main
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set exit_bp_loc [gdb_get_line_number "Set exit breakpoint here."]
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set exit_bp_loc [gdb_get_line_number "Set exit breakpoint here."]
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gdb_test "break $exit_bp_loc" "Breakpoint.* at .*" "Break at exit"
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gdb_test "break $exit_bp_loc" "Breakpoint.* at .*" "Break at exit"
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gdb_test "set follow child" "" ""
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gdb_test "set follow child" "" ""
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send_gdb "continue\n"
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send_gdb "continue\n"
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gdb_expect {
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gdb_expect {
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-re ".*Break.* main .*$gdb_prompt.*$" {}
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-re ".*Break.* main .*$gdb_prompt.*$" {}
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-re ".*$gdb_prompt $" {fail "run to exit 1"}
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-re ".*$gdb_prompt $" {fail "run to exit 1"}
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default {fail "run to exit 1 (timeout)"}
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default {fail "run to exit 1 (timeout)"}
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}
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}
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gdb_test "print pids" "\\$.* = \\{0, 0, 0, 0\\}.*" "follow child, print pids"
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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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# 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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# Result should be that none of the 4 forks returns zero.
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delete_breakpoints
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delete_breakpoints
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runto_main
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runto_main
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gdb_test "break $exit_bp_loc" "Breakpoint.* at .*" "Break at exit"
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gdb_test "break $exit_bp_loc" "Breakpoint.* at .*" "Break at exit"
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gdb_test "set follow parent" "" ""
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gdb_test "set follow parent" "" ""
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send_gdb "continue\n"
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send_gdb "continue\n"
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# The output from the child processes can be interleaved arbitrarily
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# The output from the child processes can be interleaved arbitrarily
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# with the output from GDB and the parent process. If we don't
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# with the output from GDB and the parent process. If we don't
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# consume it all now, it can confuse later interactions.
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# consume it all now, it can confuse later interactions.
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set seen_done 0
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set seen_done 0
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set seen_break 0
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set seen_break 0
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set seen_prompt 0
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set seen_prompt 0
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set seen_timeout 0
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set seen_timeout 0
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while { ($seen_done < 16 || ! $seen_prompt) && ! $seen_timeout } {
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while { ($seen_done < 16 || ! $seen_prompt) && ! $seen_timeout } {
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# We don't know what order the interesting things will arrive in.
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# We don't know what order the interesting things will arrive in.
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# Using a pattern of the form 'x|y|z' instead of -re x ... -re y
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# Using a pattern of the form 'x|y|z' instead of -re x ... -re y
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# ... -re z ensures that expect always chooses the match that
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# ... -re z ensures that expect always chooses the match that
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# occurs leftmost in the input, and not the pattern appearing
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# occurs leftmost in the input, and not the pattern appearing
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# first in the script that occurs anywhere in the input, so that
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# first in the script that occurs anywhere in the input, so that
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# we don't skip anything.
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# we don't skip anything.
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gdb_expect {
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gdb_expect {
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-re "($decimal done)|(Breakpoint)|($gdb_prompt)" {
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-re "($decimal done)|(Breakpoint)|($gdb_prompt)" {
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if {[info exists expect_out(1,string)]} {
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if {[info exists expect_out(1,string)]} {
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incr seen_done
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incr seen_done
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} elseif {[info exists expect_out(2,string)]} {
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} elseif {[info exists expect_out(2,string)]} {
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set seen_break 1
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set seen_break 1
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} elseif {[info exists expect_out(3,string)]} {
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} elseif {[info exists expect_out(3,string)]} {
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set seen_prompt 1
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set seen_prompt 1
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}
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}
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array unset expect_out
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array unset expect_out
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}
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}
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timeout { set seen_timeout 1 }
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timeout { set seen_timeout 1 }
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}
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}
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}
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}
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if { $seen_timeout } {
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if { $seen_timeout } {
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fail "run to exit 2 (timeout)"
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fail "run to exit 2 (timeout)"
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} elseif { ! $seen_prompt } {
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} elseif { ! $seen_prompt } {
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fail "run to exit 2 (no prompt)"
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fail "run to exit 2 (no prompt)"
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} elseif { ! $seen_break } {
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} elseif { ! $seen_break } {
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fail "run to exit 2 (no breakpoint hit)"
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fail "run to exit 2 (no breakpoint hit)"
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} elseif { $seen_done != 16 } {
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} elseif { $seen_done != 16 } {
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fail "run to exit 2 (missing done messages)"
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fail "run to exit 2 (missing done messages)"
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} else {
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} else {
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pass "run to exit 2"
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pass "run to exit 2"
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}
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}
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gdb_test "print pids\[0\]==0 || pids\[1\]==0 || pids\[2\]==0 || pids\[3\]==0" \
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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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" = 0" "follow parent, print pids"
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#
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#
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# Now test with detach-on-fork off.
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# Now test with detach-on-fork off.
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#
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#
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runto_main
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runto_main
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gdb_test "break $exit_bp_loc" "Breakpoint.* at .*" ""
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gdb_test "break $exit_bp_loc" "Breakpoint.* at .*" ""
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gdb_test "help set detach-on-fork" "whether gdb will detach the child.*" \
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gdb_test "help set detach-on-fork" "whether gdb will detach the child.*" \
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"help set detach"
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"help set detach"
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gdb_test "show detach-on-fork" "on." "show detach default on"
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gdb_test "show detach-on-fork" "on." "show detach default on"
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gdb_test "set detach off" "" "set detach off"
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gdb_test "set detach off" "" "set detach off"
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#
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#
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# We will now run every fork up to the exit bp,
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# We will now run every fork up to the exit bp,
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# eventually winding up with 16 forks.
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# eventually winding up with 16 forks.
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#
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#
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for {set i 1} {$i <= 15} {incr i} {
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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 "continue" "Breakpoint .* main .*exit.*" "Run to exit $i"
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gdb_test "info fork" " 4 .* 3 .* 2 .* 1 .*" "info fork $i"
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gdb_test "info fork" " 4 .* 3 .* 2 .* 1 .*" "info fork $i"
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gdb_test "restart $i" "(_dl_sysinfo_int80|fork|__kernel_(v|)syscall).*" \
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gdb_test "restart $i" "(_dl_sysinfo_int80|fork|__kernel_(v|)syscall).*" \
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"restart $i"
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"restart $i"
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}
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}
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gdb_test "continue" "Breakpoint .* main .*exit.*" "Run to exit 16"
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gdb_test "continue" "Breakpoint .* main .*exit.*" "Run to exit 16"
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gdb_test "info fork" " 4 .* 3 .* 2 .* 1 .*" "info fork 16"
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gdb_test "info fork" " 4 .* 3 .* 2 .* 1 .*" "info fork 16"
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gdb_test "restart 0" " main .*" "restart final"
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gdb_test "restart 0" " main .*" "restart final"
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#
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#
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# Now we should examine all the pids.
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# Now we should examine all the pids.
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#
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#
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#
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#
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# Test detach fork
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# Test detach fork
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#
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#
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# [assumes we're at #0]
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# [assumes we're at #0]
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gdb_test "detach fork 1" "Detached .*" "Detach 1"
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gdb_test "detach fork 1" "Detached .*" "Detach 1"
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gdb_test "detach fork 2" "Detached .*" "Detach 2"
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gdb_test "detach fork 2" "Detached .*" "Detach 2"
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gdb_test "detach fork 3" "Detached .*" "Detach 3"
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gdb_test "detach fork 3" "Detached .*" "Detach 3"
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gdb_test "detach fork 4" "Detached .*" "Detach 4"
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gdb_test "detach fork 4" "Detached .*" "Detach 4"
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#
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#
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# Test delete fork
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# Test delete fork
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#
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#
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gdb_test "delete fork 5" "" "Delete 5"
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gdb_test "delete fork 5" "" "Delete 5"
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gdb_test "info fork 5" "No fork number 5." "Did delete 5"
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gdb_test "info fork 5" "No fork number 5." "Did delete 5"
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gdb_test "delete fork 6" "" "Delete 6"
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gdb_test "delete fork 6" "" "Delete 6"
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gdb_test "info fork 6" "No fork number 6." "Did delete 6"
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gdb_test "info fork 6" "No fork number 6." "Did delete 6"
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gdb_test "delete fork 7" "" "Delete 7"
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gdb_test "delete fork 7" "" "Delete 7"
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gdb_test "info fork 7" "No fork number 7." "Did delete 7"
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gdb_test "info fork 7" "No fork number 7." "Did delete 7"
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gdb_test "delete fork 8" "" "Delete 8"
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gdb_test "delete fork 8" "" "Delete 8"
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gdb_test "info fork 8" "No fork number 8." "Did delete 8"
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gdb_test "info fork 8" "No fork number 8." "Did delete 8"
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gdb_test "delete fork 9" "" "Delete 9"
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gdb_test "delete fork 9" "" "Delete 9"
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gdb_test "info fork 9" "No fork number 9." "Did delete 9"
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gdb_test "info fork 9" "No fork number 9." "Did delete 9"
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gdb_test "delete fork 10" "" "Delete 10"
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gdb_test "delete fork 10" "" "Delete 10"
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gdb_test "info fork 10" "No fork number 10." "Did delete 10"
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gdb_test "info fork 10" "No fork number 10." "Did delete 10"
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gdb_test "delete fork 11" "" "Delete 11"
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gdb_test "delete fork 11" "" "Delete 11"
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gdb_test "info fork 11" "No fork number 11." "Did delete 11"
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gdb_test "info fork 11" "No fork number 11." "Did delete 11"
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gdb_test "delete fork 12" "" "Delete 12"
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gdb_test "delete fork 12" "" "Delete 12"
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gdb_test "info fork 12" "No fork number 12." "Did delete 12"
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gdb_test "info fork 12" "No fork number 12." "Did delete 12"
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gdb_test "delete fork 13" "" "Delete 13"
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gdb_test "delete fork 13" "" "Delete 13"
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gdb_test "info fork 13" "No fork number 13." "Did delete 13"
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gdb_test "info fork 13" "No fork number 13." "Did delete 13"
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gdb_test "delete fork 14" "" "Delete 14"
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gdb_test "delete fork 14" "" "Delete 14"
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gdb_test "info fork 14" "No fork number 14." "Did delete 14"
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gdb_test "info fork 14" "No fork number 14." "Did delete 14"
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gdb_test "delete fork 15" "" "Delete 15"
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gdb_test "delete fork 15" "" "Delete 15"
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gdb_test "info fork 15" "No fork number 15." "Did delete 15"
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gdb_test "info fork 15" "No fork number 15." "Did delete 15"
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return 0
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return 0
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