forked from Imagelibrary/binutils-gdb
f74bd9bcab
Cygwin debugging does not support follow fork. There is currently no
interface between the debugger and the Cygwin runtime to be able to
intercept forks and execs. Consequently, testcases that try to
exercise fork/exec all FAIL, and several hit long cascading timeouts.
Add a new allow_fork_tests procedure, meant to be used with require,
and sprinkle it throughout testcases that exercise fork.
Note that some tests currently are skipped on targets other than
Linux, with something like:
# Until "set follow-fork-mode" and "catch vfork" are implemented on
# other targets...
#
if {![istarget "*-linux*"]} {
continue
}
However, some BSD ports also support fork debugging nowadays, and the
testcases were never adjusted... That is why the new allow_fork_tests
procedure doesn't look for linux.
With this patch, on Cygwin, I get this:
$ make check TESTS="*/*fork*.exp"
...
=== gdb Summary ===
# of expected passes 6
# of untested testcases 1
# of unsupported tests 31
Reviewed-By: Keith Seitz <keiths@redhat.com>
Change-Id: I0c5e8c574d1f61b28d370c22a0b0b6bc3efaf978
89 lines
2.7 KiB
Plaintext
89 lines
2.7 KiB
Plaintext
# Copyright 2016-2025 Free Software Foundation, Inc.
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#
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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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# Make sure that if an inferior exits or is detached/killed, its
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# watchpoints don't end up with stale locations, preventing resumption
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# of other inferiors.
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require allow_fork_tests
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standard_testfile
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if {[build_executable "failed to build" $testfile $srcfile {debug}]} {
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return -1
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}
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# The test proper. DISPOSE indicates how to dispose of the fork
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# child. Can be either "kill", "detach", or "exit" (to continue it to
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# normal exit).
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proc do_test {dispose} {
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global binfile bkptno_numopt_re
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clean_restart $binfile
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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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if ![runto "child_function"] {
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return
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}
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gdb_test "watch globalvar" "atchpoint \[0-9\]+: globalvar" \
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"set watchpoint on inferior 2"
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# Dispose of the inferior. This should get rid of this inferior's
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# watchpoint locations.
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if {$dispose == "kill"} {
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gdb_test "kill" "" "kill inferior 2" \
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"Kill the program being debugged.*y or n. $" "y"
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} elseif {$dispose == "detach"} {
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gdb_test "detach" ".*" "detach inferior 2"
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} elseif {$dispose == "exit"} {
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gdb_test "continue" ".*exited normally.*" "run to exit inferior 2"
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} else {
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perror "unhandled dispose: $dispose"
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}
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gdb_test "inferior 1" "witching to inferior 1 .*" \
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"switch back to inferior 1"
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if {$dispose == "kill"} {
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gdb_test "print expect_signaled = 1" " = 1"
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}
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gdb_breakpoint "marker"
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# Now continue inferior 1. Before GDB was fixed, watchpoints for
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# inferior 2 managed to be left behind. When GDB realized that
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# they hadn't been inserted, the continue command was aborted:
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#
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# (gdb) continue
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# Continuing.
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# Warning:
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# Could not insert hardware watchpoint 2.
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# Could not insert hardware breakpoints:
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# You may have requested too many hardware breakpoints/watchpoints.
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#
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# Command aborted.
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# (gdb)
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#
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gdb_test "continue" "Breakpoint $bkptno_numopt_re, marker .*" \
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"continue in inferior 1"
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}
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foreach_with_prefix dispose {"kill" "detach" "exit"} {
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do_test $dispose
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}
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