| # Copyright 2005, 2006, 2007, 2008 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 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, see <http://www.gnu.org/licenses/>. |
| |
| if $tracelevel then { |
| strace $tracelevel |
| } |
| |
| if { [is_remote target] || ![isnative] } then { |
| continue |
| } |
| |
| # Until "set follow-fork-mode" and "catch fork" are implemented on |
| # other targets... |
| # |
| if {![istarget "hppa*-hp-hpux*"] && ![istarget "*-*-linux*"]} then { |
| continue |
| } |
| |
| set prms_id 0 |
| set bug_id 0 |
| |
| set testfile "multi-forks" |
| set srcfile ${testfile}.c |
| set binfile ${objdir}/${subdir}/${testfile} |
| |
| if { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug}] != "" } { |
| untested multi-forks.exp |
| return -1 |
| } |
| |
| # Start with a fresh gdb |
| |
| gdb_exit |
| gdb_start |
| gdb_reinitialize_dir $srcdir/$subdir |
| gdb_load ${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. |
| # |
| |
| # 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. |
| |
| 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 $" {fail "run to exit 1"} |
| default {fail "run to exit 1 (timeout)"} |
| } |
| |
| gdb_test "print pids" "\\$.* = \\{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 |
| runto_main |
| gdb_test "break $exit_bp_loc" "Breakpoint.* at .*" "Break at exit" |
| gdb_test "set follow parent" "" "" |
| |
| send_gdb "continue\n" |
| |
| # The output from the child processes can be interleaved arbitrarily |
| # with the output from GDB and the parent process. If we don't |
| # consume it all now, it can confuse later interactions. |
| set seen_done 0 |
| set seen_break 0 |
| set seen_prompt 0 |
| set seen_timeout 0 |
| while { ($seen_done < 16 || ! $seen_prompt) && ! $seen_timeout } { |
| # We don't know what order the interesting things will arrive in. |
| # Using a pattern of the form 'x|y|z' instead of -re x ... -re y |
| # ... -re z ensures that expect always chooses the match that |
| # occurs leftmost in the input, and not the pattern appearing |
| # first in the script that occurs anywhere in the input, so that |
| # we don't skip anything. |
| gdb_expect { |
| -re "($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" |
| } |
| |
| 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. |
| # |
| |
| runto_main |
| gdb_test "break $exit_bp_loc" "Breakpoint.* at .*" "" |
| |
| gdb_test "help set detach-on-fork" "whether gdb will detach the child.*" \ |
| "help set detach" |
| |
| gdb_test "show detach-on-fork" "on." "show detach default on" |
| |
| gdb_test "set detach off" "" "set detach off" |
| |
| # |
| # We will now run every fork up to the exit bp, |
| # eventually winding up with 16 forks. |
| # |
| |
| for {set i 1} {$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_(v|)syscall).*" \ |
| "restart $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" |
| |
| # |
| # Now we should examine all the pids. |
| # |
| |
| # |
| # Test detach fork |
| # |
| |
| # [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" |
| |
| # |
| # Test delete fork |
| # |
| |
| 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" |
| |
| return 0 |
| |