# Copyright 1997, 1999, 2007 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 . */ # Please email any bugs, comments, and/or additions to this file to: # bug-gdb@prep.ai.mit.edu if $tracelevel then { strace $tracelevel } if { ![isnative] } then { continue } set prms_id 0 set bug_id 0 set testfile "foll-fork" set srcfile ${testfile}.c set binfile ${objdir}/${subdir}/${testfile} if { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug}] != "" } { untested foll-fork.exp return -1 } # Until "set follow-fork-mode" and "catch fork" are implemented on # other targets... # if ![istarget "hppa*-hp-hpux*"] then { continue } proc default_fork_parent_follow {} { global gdb_prompt send_gdb "show follow\n" gdb_expect { -re "Debugger response to a program call of fork or vfork is \"parent\"..*$gdb_prompt $"\ {pass "default show parent follow, no catchpoints"} -re "$gdb_prompt $" {fail "default show parent follow, no catchpoints"} timeout {fail "(timeout) default show parent follow, no catchpoints"} } send_gdb "next 2\n" gdb_expect { -re "Detaching after fork from.*$gdb_prompt $"\ {pass "default parent follow, no catchpoints"} -re "$gdb_prompt $" {fail "default parent follow, no catchpoints"} timeout {fail "(timeout) default parent follow, no catchpoints" } } # The child has been detached; allow time for any output it might # generate to arrive, so that output doesn't get confused with # any expected debugger output from a subsequent testpoint. # exec sleep 1 } proc explicit_fork_parent_follow {} { global gdb_prompt send_gdb "set follow parent\n" gdb_expect { -re "$gdb_prompt $" {pass "set follow parent"} timeout {fail "(timeout) set follow parent"} } send_gdb "show follow\n" gdb_expect { -re "Debugger response to a program call of fork or vfork is \"parent\"..*$gdb_prompt $"\ {pass "explicit show parent follow, no catchpoints"} -re "$gdb_prompt $" {fail "explicit show parent follow, no catchpoints"} timeout {fail "(timeout) explicit show parent follow, no catchpoints"} } send_gdb "next 2\n" gdb_expect { -re "Detaching after fork from.*$gdb_prompt $"\ {pass "explicit parent follow, no catchpoints"} -re "$gdb_prompt $" {fail "explicit parent follow, no catchpoints"} timeout {fail "(timeout) explicit parent follow, no catchpoints"} } # The child has been detached; allow time for any output it might # generate to arrive, so that output doesn't get confused with # any expected debugger output from a subsequent testpoint. # exec sleep 1 } proc explicit_fork_child_follow {} { global gdb_prompt send_gdb "set follow child\n" gdb_expect { -re "$gdb_prompt $" {pass "set follow child"} timeout {fail "(timeout) set follow child"} } send_gdb "show follow\n" gdb_expect { -re "Debugger response to a program call of fork or vfork is \"child\"..*$gdb_prompt $"\ {pass "explicit show child follow, no catchpoints"} -re "$gdb_prompt $" {fail "explicit show child follow, no catchpoints"} timeout {fail "(timeout) explicit show child follow, no catchpoints"} } send_gdb "next 2\n" gdb_expect { -re "Detaching from program:.*Attaching after fork to.*$gdb_prompt $"\ {pass "explicit child follow, no catchpoints"} -re "$gdb_prompt $" {fail "explicit child follow, no catchpoints"} timeout {fail "(timeout) explicit child follow, no catchpoints"} } # The child has been detached; allow time for any output it might # generate to arrive, so that output doesn't get confused with # any gdb_expected debugger output from a subsequent testpoint. # exec sleep 1 } proc catch_fork_child_follow {} { global gdb_prompt send_gdb "catch fork\n" gdb_expect { -re "Catchpoint .*(fork).*$gdb_prompt $"\ {pass "explicit child follow, set catch fork"} -re "$gdb_prompt $" {fail "explicit child follow, set catch fork"} timeout {fail "(timeout) explicit child follow, set catch fork"} } # Verify that the catchpoint is mentioned in an "info breakpoints", # and further that the catchpoint mentions no process id. # send_gdb "info breakpoints\n" gdb_expect { -re ".*catch fork.*keep y.*$gdb_prompt $"\ {pass "info shows catchpoint without pid"} -re ".*catch fork.*process .*$gdb_prompt $"\ {fail "info shows catchpoint without pid"} -re "$gdb_prompt $" {fail "info shows catchpoint without pid"} timeout {fail "(timeout) info shows catchpoint without pid"} } send_gdb "continue\n" gdb_expect { -re "Catchpoint.*(forked process.*),.*in _fork_sys.*$gdb_prompt $"\ {pass "explicit child follow, catch fork"} -re "$gdb_prompt $" {fail "explicit child follow, catch fork"} timeout {fail "(timeout) explicit child follow, catch fork"} } # Verify that the catchpoint is mentioned in an "info breakpoints", # and further that the catchpoint managed to capture a process id. # send_gdb "info breakpoints\n" gdb_expect { -re ".*catch fork .*process \[0-9\]+.*$gdb_prompt $"\ {pass "info shows catchpoint pid"} -re "$gdb_prompt $" {fail "info shows catchpoint pid"} timeout {fail "(timeout) info shows catchpoint pid"} } send_gdb "set follow child\n" gdb_expect { -re "$gdb_prompt $" {pass "set follow child"} timeout {fail "(timeout) set follow child"} } send_gdb "tbreak 24\n" gdb_expect { -re "Breakpoint.*, line 24.*$gdb_prompt $"\ {pass "set follow child, tbreak"} -re "$gdb_prompt $" {fail "set follow child, tbreak"} timeout {fail "(timeout) set follow child, tbreak"} } send_gdb "continue\n" gdb_expect { -re ".*Detaching from program:.*Attaching after fork to.* at .*24.*$gdb_prompt $"\ {pass "set follow child, hit tbreak"} -re "$gdb_prompt $" {fail "set follow child, hit tbreak"} timeout {fail "(timeout) set follow child, hit tbreak"} } # The child has been detached; allow time for any output it might # generate to arrive, so that output doesn't get confused with # any expected debugger output from a subsequent testpoint. # exec sleep 1 send_gdb "delete breakpoints\n" gdb_expect { -re "Delete all breakpoints.*$" { send_gdb "y\n" gdb_expect { -re "$gdb_prompt $"\ {pass "set follow child, cleanup"} timeout {fail "(timeout) set follow child, cleanup"} } } -re "$gdb_prompt $" {fail "set follow child, cleanup"} timeout {fail "(timeout) set follow child, cleanup"} } } proc tcatch_fork_parent_follow {} { global gdb_prompt send_gdb "catch fork\n" gdb_expect { -re "Catchpoint .*(fork).*$gdb_prompt $"\ {pass "explicit parent follow, set tcatch fork"} -re "$gdb_prompt $" {fail "explicit parent follow, set tcatch fork"} timeout {fail "(timeout) explicit parent follow, set tcatch fork"} } # ??rehrauer: I don't yet know how to get the id of the tcatch # via this script, so that I can add a -do list to it. For now, # do the follow stuff after the catch happens. send_gdb "continue\n" gdb_expect { -re ".*in _fork_sys.*$gdb_prompt $"\ {pass "explicit parent follow, tcatch fork"} -re "$gdb_prompt $" {fail "explicit parent follow, tcatch fork"} timeout {fail "(timeout) explicit parent follow, tcatch fork"} } send_gdb "set follow parent\n" gdb_expect { -re "$gdb_prompt $" {pass "set follow parent"} timeout {fail "(timeout) set follow parent"} } send_gdb "tbreak 24\n" gdb_expect { -re "Breakpoint.*, line 24.*$gdb_prompt $"\ {pass "set follow parent, tbreak"} -re "$gdb_prompt $" {fail "set follow parent, tbreak"} timeout {fail "(timeout) set follow child, tbreak"} } send_gdb "continue\n" gdb_expect { -re ".*Detaching after fork from.* at .*24.*$gdb_prompt $"\ {pass "set follow parent, hit tbreak"} -re "$gdb_prompt $" {fail "set follow parent, hit tbreak"} timeout {fail "(timeout) set follow parent, hit tbreak"} } # The child has been detached; allow time for any output it might # generate to arrive, so that output doesn't get confused with # any expected debugger output from a subsequent testpoint. # exec sleep 1 send_gdb "delete breakpoints\n" gdb_expect { -re "Delete all breakpoints.*$" { send_gdb "y\n" gdb_expect { -re "$gdb_prompt $"\ {pass "set follow parent, cleanup"} timeout {fail "(timeout) set follow parent, cleanup"} } } -re "$gdb_prompt $" {fail "set follow parent, cleanup"} timeout {fail "(timeout) set follow parent, cleanup"} } } proc do_fork_tests {} { global gdb_prompt # Verify that help is available for "set follow-fork-mode". # send_gdb "help set follow-fork-mode\n" gdb_expect { -re "Set debugger response to a program call of fork or vfork..* A fork or vfork creates a new process. follow-fork-mode can be:.* .*parent - the original process is debugged after a fork.* .*child - the new process is debugged after a fork.* The unfollowed process will continue to run..* By default, the debugger will follow the parent process..*$gdb_prompt $"\ { pass "help set follow" } -re "$gdb_prompt $" { fail "help set follow" } timeout { fail "(timeout) help set follow" } } # Verify that we can set follow-fork-mode, using an abbreviation # for both the flag and its value. # send_gdb "set follow ch\n" send_gdb "show fol\n" gdb_expect { -re "Debugger response to a program call of fork or vfork is \"child\".*$gdb_prompt $"\ {pass "set follow, using abbreviations"} timeout {fail "(timeout) set follow, using abbreviations"} } # Verify that we cannot set follow-fork-mode to nonsense. # send_gdb "set follow chork\n" gdb_expect { -re "Undefined item: \"chork\".*$gdb_prompt $"\ {pass "set follow to nonsense is prohibited"} -re "$gdb_prompt $" {fail "set follow to nonsense is prohibited"} timeout {fail "(timeout) set follow to nonsense is prohibited"} } send_gdb "set follow parent\n" gdb_expect { -re "$gdb_prompt $" {pass "set follow to nonsense is prohibited (reset parent)"} timeout {fail "set follow to nonsense is prohibited (reset parent)"} } # Test the default behaviour, which is to follow the parent of a # fork, and detach from the child. Do this without catchpoints. # if [runto_main] then { default_fork_parent_follow } # Test the ability to explicitly follow the parent of a fork, and # detach from the child. Do this without catchpoints. # if [runto_main] then { explicit_fork_parent_follow } # Test the ability to follow the child of a fork, and detach from # the parent. Do this without catchpoints. # if [runto_main] then { explicit_fork_child_follow } # Test the ability to follow both child and parent of a fork. Do # this without catchpoints. # ??rehrauer: NYI. Will add testpoints here when implemented. # # Test the ability to have the debugger ask the user at fork-time # whether to follow the parent, child or both. Do this without # catchpoints. # ??rehrauer: NYI. Will add testpoints here when implemented. # # Test the ability to catch a fork, specify that the child be # followed, and continue. Make the catchpoint permanent. # if [runto_main] then { catch_fork_child_follow } # Test the ability to catch a fork, specify via a -do clause that # the parent be followed, and continue. Make the catchpoint temporary. # if [runto_main] then { tcatch_fork_parent_follow } } # Start with a fresh gdb gdb_exit gdb_start gdb_reinitialize_dir $srcdir/$subdir gdb_load ${binfile} # This is a test of gdb's ability to follow the parent, child or both # parent and child of a Unix fork() system call. # do_fork_tests return 0