186 lines
5.5 KiB
Plaintext
186 lines
5.5 KiB
Plaintext
# Copyright 2005-2016 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/>.
|
|
|
|
# Until "set follow-fork-mode" and "catch fork" are implemented on
|
|
# other targets...
|
|
#
|
|
if { ![istarget "*-*-linux*"] } then {
|
|
continue
|
|
}
|
|
|
|
|
|
standard_testfile .c
|
|
|
|
if { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug}] != "" } {
|
|
untested multi-forks.exp
|
|
return -1
|
|
}
|
|
|
|
# Start with a fresh gdb
|
|
|
|
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.
|
|
|
|
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 ${binfile}
|
|
runto_main
|
|
gdb_test_no_output "set follow-fork child"
|
|
continue_to_exit_bp_loc
|
|
|
|
gdb_test "print pids" "\\$.* = \\{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.
|
|
|
|
clean_restart ${binfile}
|
|
runto_main
|
|
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_breakpoint $exit_bp_loc
|
|
|
|
gdb_test "help set detach-on-fork" "whether gdb will detach the child.*" \
|
|
"help set detach"
|
|
|
|
gdb_test "show detach-on-fork" "on." "show detach default on"
|
|
|
|
gdb_test_no_output "set detach off" "set detach off"
|
|
|
|
#
|
|
# We will now run every fork up to the exit bp,
|
|
# eventually winding up with 16 inferiors.
|
|
#
|
|
|
|
for {set i 1} {$i <= 15} {incr i} {
|
|
gdb_test "continue" "Breakpoint .* main .*exit.*" "run to exit $i"
|
|
gdb_test "info 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 inferior" " 2 .* 3 .* 4 .* 5 .*" "info inferior 16"
|
|
gdb_test "inferior 2" " main .*" "restart final"
|
|
|
|
#
|
|
# Now we should examine all the pids.
|
|
#
|
|
|
|
#
|
|
# Test detach inferior
|
|
#
|
|
|
|
# [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 kill inferior
|
|
#
|
|
|
|
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
|