398 lines
15 KiB
Plaintext
398 lines
15 KiB
Plaintext
# Copyright (C) 1997 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 2 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, write to the Free Software
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# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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# Please email any bugs, comments, and/or additions to this file to:
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# bug-gdb@prep.ai.mit.edu
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if [target_info exists gdb,nosignals] {
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verbose "Skipping signals.exp because of nosignals."
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continue
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}
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if $tracelevel then {
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strace $tracelevel
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}
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set prms_id 0
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set bug_id 0
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set testfile signals
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set srcfile ${testfile}.c
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set binfile ${objdir}/${subdir}/${testfile}
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if { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug}] != "" } {
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perror "Couldn't compile ${srcfile}"
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return -1
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}
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# Create and source the file that provides information about the compiler
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# used to compile the test case.
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if [get_compiler_info ${binfile}] {
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return -1;
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}
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proc signal_tests_1 {} {
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global gdb_prompt
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if [runto_main] then {
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gdb_test "next" "signal \\(SIGUSR1.*" \
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"next over signal (SIGALRM, handler)"
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gdb_test "next" "alarm \\(.*" \
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"next over signal (SIGUSR1, handler)"
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gdb_test "next" "\\+\\+count; /\\* first \\*/" \
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"next over alarm (1)"
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# An alarm has been signaled, give the signal time to get delivered.
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sleep 2
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# i386 BSD currently fails the next test with a SIGTRAP.
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setup_xfail "i*86-*-bsd*"
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# But Dynix has a DECR_PC_AFTER_BREAK of zero, so the failure
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# is shadowed by hitting the through_sigtramp_breakpoint.
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clear_xfail "i*86-sequent-bsd*"
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# Univel SVR4 i386 continues instead of stepping.
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setup_xfail "i*86-univel-sysv4*"
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# lynx fails with "next" acting like "continue"
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setup_xfail "*-*-*lynx*"
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# linux (aout versions) also fails with "next" acting like "continue"
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# this is probably more dependant on the kernel version than on the
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# object file format or utils. (sigh)
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setup_xfail "i*86-pc-linuxaout-gnu" "i*86-pc-linuxoldld-gnu"
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send_gdb "next\n"
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gdb_expect {
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-re "alarm .*$gdb_prompt $" { pass "next to 2nd alarm (1)" }
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-re "Program received signal SIGTRAP.*first.*$gdb_prompt $" {
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# This can happen on machines that have a trace flag
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# in their PS register.
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# The trace flag in the PS register will be set due to
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# the `next' command.
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# Before calling the signal handler, the PS register
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# is pushed along with the context on the user stack.
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# When the signal handler has finished, it reenters the
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# the kernel via a sigreturn syscall, which restores the
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# PS register along with the context.
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# If the kernel erroneously does not clear the trace flag
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# in the pushed context, gdb will receive a SIGTRAP from
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# the set trace flag in the restored context after the
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# signal handler has finished.
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# I do not yet understand why the SIGTRAP does not occur
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# after stepping the instruction at the restored PC on
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# i386 BSDI 1.0 systems.
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# Note that the vax under Ultrix also exhibits
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# this behaviour (it is uncovered by the `continue from
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# a break in a signal handler' test below).
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# With this test the failure is shadowed by hitting the
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# through_sigtramp_breakpoint upon return from the signal
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# handler.
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fail "next to 2nd alarm (1) (probably kernel bug)"
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gdb_test "next" "alarm.*" "next to 2nd alarm (1)"
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}
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-re "Program exited with code.*$gdb_prompt $" {
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# This is apparently a bug in the UnixWare kernel (but
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# has not been investigated beyond the
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# resume/target_wait level, and has not been reported
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# to Univel). If it steps when a signal is pending,
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# it does a continue instead. I don't know whether
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# there is a workaround.
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# Perhaps this problem exists on other SVR4 systems;
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# but (a) we have no reason to think so, and (b) if we
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# put a wrong xfail here, we never get an XPASS to let
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# us know that it was incorrect (and then if such a
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# configuration regresses we have no way of knowing).
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# Solaris is not a relevant data point either way
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# because it lacks single stepping.
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# fnf: I don't agree with the above philosophy. We
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# can never be sure that any particular XFAIL is
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# specified 100% correctly in that no systems with
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# the bug are missed and all systems without the bug
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# are excluded. If we include an XFAIL that isn't
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# appropriate for a particular system, then when that
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# system gets tested it will XPASS, and someone should
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# investigate and fix the setup_xfail as appropriate,
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# or more preferably, the actual bug. Each such case
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# adds more data to narrowing down the scope of the
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# problem and ultimately fixing it.
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setup_xfail "i*86-*-sysv4*"
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fail "'next' behaved as 'continue (known SVR4 bug)'"
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return 0
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}
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-re ".*$gdb_prompt $" { fail "next to 2nd alarm (1)" }
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timeout { fail "next to 2nd alarm (1); (timeout)" }
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eof { fail "next to 2nd alarm (1); (eof)" }
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}
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gdb_test "break handler" "Breakpoint \[0-9\]+ .*"
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gdb_test "next" "\\+\\+count; /\\* second \\*/" \
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"next to 2nd ++count in signals_tests_1"
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# An alarm has been signaled, give the signal time to get delivered.
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sleep 2
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set bash_bug 0
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send_gdb "next\n"
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setup_xfail "i*86-pc-linux-gnu"
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gdb_expect {
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-re "Breakpoint.*handler.*$gdb_prompt $" {
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pass "next to handler in signals_tests_1"
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}
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-re "Program received signal SIGEMT.*$gdb_prompt $" {
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# Bash versions before 1.13.5 cause this behaviour
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# by blocking SIGTRAP.
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fail "next to handler in signals_tests_1 (known problem with bash versions before 1.13.5)"
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set bash_bug 1
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gdb_test "signal 0" "Breakpoint.*handler.*"
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}
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-re ".*$gdb_prompt $" { fail "next to handler in signals_tests_1" }
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timeout { fail "next to handler in signals_tests_1 (timeout)" }
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eof { fail "next to handler in signals_tests_1 (eof)" }
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}
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# This doesn't test that main is frame #2, just that main is frame
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# #2, #3, or higher. At some point this should be fixed (but
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# it quite possibly would introduce new FAILs on some systems).
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setup_xfail "i*86-pc-linux-gnu" "i*86-*-bsdi2.0"
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gdb_test "backtrace" "#0.*handler.*#1.*#2.*main.*" \
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"backtrace in signals_tests_1"
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gdb_test "break func1" "Breakpoint \[0-9\]+ .*"
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gdb_test "break func2" "Breakpoint \[0-9\]+ .*"
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# Vax Ultrix and i386 BSD currently fail the next test with
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# a SIGTRAP, but with different symptoms.
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setup_xfail "vax-*-ultrix*"
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setup_xfail "i*86-*-bsd*"
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setup_xfail "i*86-pc-linux-gnu"
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send_gdb "continue\n"
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gdb_expect {
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-re "Breakpoint.*func1.*$gdb_prompt $" { pass "continue to func1" }
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-re "Program received signal SIGTRAP.*second.*$gdb_prompt $" {
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# See explanation for `next to 2nd alarm (1)' fail above.
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# We did step into the signal handler, hit a breakpoint
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# in the handler and continued from the breakpoint.
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# The set trace flag in the restored context is causing
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# the SIGTRAP, without stepping an instruction.
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fail "continue to func1 (probably kernel bug)"
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gdb_test "continue" "Breakpoint.*func1.*" \
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"extra continue to func1"
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}
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-re "Program received signal SIGTRAP.*func1 ..;.*$gdb_prompt $" {
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# On the vax under Ultrix the set trace flag in the restored
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# context is causing the SIGTRAP, but after stepping one
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# instruction, as expected.
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fail "continue to func1 (probably kernel bug)"
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gdb_test "continue" "Breakpoint.*func1.*" \
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"extra continue to func1"
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}
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-re ".*$gdb_prompt $" { fail "continue to func1" }
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default { fail "continue to func1" }
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}
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setup_xfail "*-*-irix*"
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send_gdb "signal SIGUSR1\n"
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gdb_expect {
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-re "Breakpoint.*handler.*$gdb_prompt $" { pass "signal SIGUSR1" }
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-re "Program received signal SIGUSR1.*$gdb_prompt $" {
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# This is what irix4 and irix5 do.
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# It would appear to be a kernel bug.
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fail "signal SIGUSR1"
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gdb_test "continue" "Breakpoint.*handler.*" "pass it SIGUSR1"
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}
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-re ".*$gdb_prompt $" { fail "signal SIGUSR1" }
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default { fail "signal SIGUSR1" }
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}
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# Will tend to wrongly require an extra continue.
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# The problem here is that the breakpoint at func1 will be
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# inserted, and when the system finishes with the signal
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# handler it will try to execute there. For GDB to try to
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# remember that it was going to step over a breakpoint when a
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# signal happened, distinguish this case from the case where
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# func1 is called from the signal handler, etc., seems
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# exceedingly difficult. So don't expect this to get fixed
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# anytime soon.
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setup_xfail "*-*-*"
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send_gdb "continue\n"
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gdb_expect {
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-re "Breakpoint.*func2.*$gdb_prompt $" { pass "continue to func2" }
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-re "Breakpoint.*func1.*$gdb_prompt $" {
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fail "continue to func2"
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gdb_test "continue" "Breakpoint.*func2.*" \
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"extra continue to func2"
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}
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-re ".*$gdb_prompt $" { fail "continue to func2" }
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default { fail "continue to func2" }
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}
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sleep 2
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# GDB yanks out the breakpoints to step over the breakpoint it
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# stopped at, which means the breakpoint at handler is yanked.
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# But if NO_SINGLE_STEP, we won't get another chance to reinsert
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# them (at least not with procfs, where we tell the kernel not
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# to tell gdb about `pass' signals). So the fix would appear to
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# be to just yank that one breakpoint when we step over it.
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setup_xfail "sparc*-*-*"
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setup_xfail "rs6000-*-*"
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setup_xfail "powerpc-*-*"
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# A faulty bash will not step the inferior into sigtramp on sun3.
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if {$bash_bug} then {
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setup_xfail "m68*-*-sunos4*"
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}
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setup_xfail "i*86-pc-linux-gnu"
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gdb_test "continue" "Breakpoint.*handler.*" "continue to handler"
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# If the NO_SINGLE_STEP failure happened, we have already exited.
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# If we succeeded a continue will return from the handler to func2.
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# GDB now has `forgotten' that it intended to step over the
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# breakpoint at func2 and will stop at func2.
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setup_xfail "*-*-*"
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# The sun3 with a faulty bash will also be `forgetful' but it
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# already got the spurious stop at func2 and this continue will work.
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if {$bash_bug} then {
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clear_xfail "m68*-*-sunos4*"
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}
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gdb_test "continue" "Program exited with code 010\\." \
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"continue to exit in signals_tests_1 "
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}
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}
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# On a few losing systems, ptrace (PT_CONTINUE) or ptrace (PT_STEP)
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# causes pending signals to be cleared, which causes these tests to
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# get nowhere fast. This is totally losing behavior (perhaps there
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# are cases in which is it useful but the user needs more control,
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# which they mostly have in GDB), but some people apparently think it
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# is a feature. It is documented in the ptrace manpage on Motorola
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# Delta Series sysV68 R3V7.1 and on HPUX 9.0. Even the non-HPUX PA
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# OSes (BSD and OSF/1) seem to have figured they had to copy this
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# braindamage.
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if {[ istarget "m68*-motorola-*" ] || [ istarget "hppa*-*-bsd*" ] ||
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[ istarget "*-*-hpux*" ] || [ istarget "hppa*-*-osf*" ]} then {
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setup_xfail "*-*-*"
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fail "ptrace loses on signals on this target"
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return 0
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}
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# lynx2.2.2 doesn't lose signals, instead it screws up the stack pointer
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# in some of these tests leading to massive problems. I've
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# reported this to lynx, hopefully it'll be fixed in lynx2.3.
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# Severe braindamage.
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if [ istarget "*-*-*lynx*" ] then {
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setup_xfail "*-*-*"
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fail "kernel scroggs stack pointer in signal tests on this target"
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return 0
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}
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gdb_exit
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gdb_start
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# This will need to be updated as the exact list of signals changes,
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# but I want to test that TARGET_SIGNAL_0, TARGET_SIGNAL_DEFAULT, and
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# TARGET_SIGNAL_UNKNOWN are skipped.
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proc test_handle_all_print {} {
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global timeout
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# Increase timeout and expect input buffer for large output from gdb.
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# Allow blank or TAB as whitespace characters.
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set oldtimeout $timeout
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set timeout [expr "$timeout + 360"]
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verbose "Timeout is now $timeout seconds" 2
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match_max 10000
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gdb_test "handle all print" "Signal\[ \]+Stop\[ \]+Print\[ \]+Pass to program\[ \]+Description\r\nSIGHUP\[ \]+Yes\[ \]+Yes\[ \]+Yes\[ \]+Hangup.*SIG63\[ \]+Yes\[ \]+Yes\[ \]+Yes\[ \]+Real-time event 63.*EXC_BREAKPOINT\[ \]+Yes\[ \]+Yes\[ \]+Yes\[ \]+Breakpoint"
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set timeout $oldtimeout
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verbose "Timeout restored to $timeout seconds" 2
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}
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test_handle_all_print
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gdb_exit
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gdb_start
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gdb_reinitialize_dir $srcdir/$subdir
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gdb_load $binfile
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signal_tests_1
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# Force a resync, so we're looking at the right prompt. On SCO we
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# were getting out of sync (I don't understand why).
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send_gdb "p 1+1\n"
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gdb_expect {
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-re "= 2.*$gdb_prompt $" {}
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-re ".*$gdb_prompt $" { perror "sync trouble in signals.exp" }
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default { perror "sync trouble in signals.exp" }
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}
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if [runto_main] then {
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gdb_test "break handler if 0" "Breakpoint \[0-9\]+ .*"
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gdb_test "set \$handler_breakpoint_number = \$bpnum" ""
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# Get to the point where a signal is waiting to be delivered
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gdb_test "next" "signal \\(SIGUSR1.*" "next to signal in signals.exp"
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gdb_test "next" "alarm \\(.*" "next to alarm #1 in signals.exp"
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gdb_test "next" "\\+\\+count; /\\* first \\*/" \
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"next to ++count #1 in signals.exp"
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# Give the signal time to get delivered
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sleep 2
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# Now call a function. When GDB tries to run the stack dummy,
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# it will hit the breakpoint at handler. Provided it doesn't
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# lose its cool, this is not a problem, it just has to note
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# that the breakpoint condition is false and keep going.
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gdb_test "p func1 ()" "^p func1 \\(\\)\r\n.\[0-9\]* = void" \
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"p func1 () #1 in signals.exp"
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# Make sure the count got incremented.
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# Haven't investigated this xfail
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setup_xfail "rs6000-*-*"
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setup_xfail "powerpc-*-*"
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gdb_test "p count" "= 2" "p count #1 in signals.exp"
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if { [istarget "rs6000-*-*"] || [istarget "powerpc-*-*"] } { return 0 }
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gdb_test "condition \$handler_breakpoint_number" "now unconditional\\."
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gdb_test "next" "alarm \\(.*" "next to alarm #2 in signals.exp"
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gdb_test "next" "\\+\\+count; /\\* second \\*/" \
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"next to ++count #2 in signals.exp"
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sleep 2
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# This time we stop when GDB tries to run the stack dummy.
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# So it is OK that we do not print the return value from the function.
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gdb_test "p func1 ()" \
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"Breakpoint \[0-9\]*, handler.*
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The program being debugged stopped while in a function called from GDB.*" \
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"p func1 () #2 in signals.exp"
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# But we should be able to backtrace...
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# On alpha-*-osf2.0 this test works when run manually but sometime fails when
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# run under dejagnu, making it very hard to debug the problem. Weird...
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gdb_test "bt" "#0.*handler.*#1.*#2.*main.*" "bt in signals.exp"
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# ...and continue...
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gdb_test "continue" "Continuing\\." "continue in signals.exp"
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# ...and then count should have been incremented
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gdb_test "p count" "= 5" "p count #2 in signals.exp"
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}
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return 0
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