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100 lines
3.5 KiB
Plaintext
100 lines
3.5 KiB
Plaintext
# Copyright 2016-2018 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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# When we intercept a fork/vfork with a catchpoint, the child is left
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# stopped. At that point, if we kill the parent, we should kill the
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# child as well. This test makes sure that works. See PR gdb/19494.
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# The main idea of the test is make sure that when the program stops
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# for a fork catchpoint, and the user kills the parent, gdb also kills
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# the unfollowed fork child. Since the child hasn't been added as an
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# inferior at that point, we need some other portable way to detect
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# that the child is gone. The test uses a pipe for that. The program
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# forks twice, so you have grandparent, child and grandchild. The
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# grandchild inherits the write side of the pipe. The grandparent
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# hangs reading from the pipe, since nothing ever writes to it. If,
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# when GDB kills the child, it also kills the grandchild, then the
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# grandparent's pipe read returns 0/EOF and the test passes.
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# Otherwise, if GDB doesn't kill the grandchild, then the pipe read
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# never returns and the test times out.
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standard_testfile
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# Build two programs -- one for fork, and another for vfork.
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set testfile_fork "${testfile}-fork"
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set testfile_vfork "${testfile}-vfork"
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foreach kind {"fork" "vfork"} {
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set compile_options "debug additional_flags=-DFORK=$kind"
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set testfile [set testfile_$kind]
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if {[build_executable $testfile.exp $testfile ${srcfile} \
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${compile_options}] == -1} {
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untested "failed to compile"
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return -1
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}
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}
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# The test proper. FORK_KIND is either "fork" or "vfork". EXIT_KIND
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# is either "exit" (run the parent to exit) or "kill" (kill parent).
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proc do_test {fork_kind exit_kind} {
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global testfile testfile_$fork_kind
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set testfile [set testfile_$fork_kind]
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with_test_prefix "$fork_kind" {
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clean_restart $testfile
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if ![runto_main] {
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untested "could not run to main"
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return -1
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}
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gdb_test_no_output "set follow-fork child"
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gdb_test_no_output "set detach-on-fork off"
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gdb_test "catch $fork_kind" "Catchpoint .*($fork_kind).*"
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gdb_test "continue" \
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"Catchpoint \[0-9\]* \\(${fork_kind}ed process \[0-9\]*\\),.*" \
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"continue to child ${fork_kind}"
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gdb_test "continue" \
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"Catchpoint \[0-9\]* \\(${fork_kind}ed process \[0-9\]*\\),.*" \
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"continue to grandchild ${fork_kind}"
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gdb_test "kill inferior 2" "" "kill child" \
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"Kill the program being debugged.*y or n. $" "y"
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gdb_test "inferior 1" "Switching to inferior 1 .*" "switch to parent"
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if {$exit_kind == "exit"} {
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gdb_test "break grandparent_done" "Breakpoint .*"
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gdb_test "continue" "hit Breakpoint .*, grandparent_done.*"
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} elseif {$exit_kind == "kill"} {
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gdb_test "kill" "" "kill parent" \
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"Kill the program being debugged.*y or n. $" "y"
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} else {
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perror "unreachable"
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}
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}
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}
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foreach_with_prefix fork-kind {"fork" "vfork"} {
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foreach_with_prefix exit-kind {"exit" "kill"} {
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do_test ${fork-kind} ${exit-kind}
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}
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}
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