From 5589af0e6661abe07e9a997f6324988b4b87c72f Mon Sep 17 00:00:00 2001 From: Pedro Alves Date: Mon, 12 Jan 2015 19:30:08 +0000 Subject: [PATCH] PR17525 - breakpoint commands not executed when program run from -x script Executing a gdb script that runs the inferior (from the command line with -x), and has it hit breakpoints with breakpoint commands that themselves run the target, is currently broken on async targets (Linux, remote). While we're executing a command list or a script, we force the interpreter to be sync, which results in some functions nesting an event loop and waiting for the target to stop, instead of returning immediately and having the top level event loop handle the stop. The issue with this bug is simply that bpstat_do_actions misses checking whether the interpreter is sync. When we get here, in the case of executing a script (or, when the interpreter is sync), the program has already advanced to the next breakpoint, through maybe_wait_sync_command_done. We need to process its breakpoints immediately, just like with a sync target. Tested on x86_64 Fedora 20. gdb/ 2015-01-14 Pedro Alves PR gdb/17525 * breakpoint.c: Include "interps.h". (bpstat_do_actions_1): Also check whether the interpreter is async. gdb/testsuite/ 2015-01-14 Pedro Alves Joel Brobecker PR gdb/17525 * gdb.base/bp-cmds-execution-x-script.c: New file. * gdb.base/bp-cmds-execution-x-script.exp: New file. * gdb.base/bp-cmds-execution-x-script.gdb: New file. --- gdb/ChangeLog | 7 ++ gdb/breakpoint.c | 4 +- gdb/testsuite/ChangeLog | 8 +++ .../gdb.base/bp-cmds-execution-x-script.c | 35 ++++++++++ .../gdb.base/bp-cmds-execution-x-script.exp | 75 ++++++++++++++++++++++ .../gdb.base/bp-cmds-execution-x-script.gdb | 20 ++++++ 6 files changed, 147 insertions(+), 2 deletions(-) create mode 100644 gdb/testsuite/gdb.base/bp-cmds-execution-x-script.c create mode 100644 gdb/testsuite/gdb.base/bp-cmds-execution-x-script.exp create mode 100644 gdb/testsuite/gdb.base/bp-cmds-execution-x-script.gdb diff --git a/gdb/ChangeLog b/gdb/ChangeLog index b84ffc8..648b341 100644 --- a/gdb/ChangeLog +++ b/gdb/ChangeLog @@ -1,5 +1,12 @@ 2015-01-14 Pedro Alves + PR gdb/17525 + * breakpoint.c: Include "interps.h". + (bpstat_do_actions_1): Also check whether the interpreter is + async. + +2015-01-14 Pedro Alves + PR cli/17828 * infrun.c (reinstall_readline_callback_handler_cleanup): Don't reinstall if the interpreter is sync. diff --git a/gdb/breakpoint.c b/gdb/breakpoint.c index c64c2a9..af0c2cf 100644 --- a/gdb/breakpoint.c +++ b/gdb/breakpoint.c @@ -66,7 +66,7 @@ #include "skip.h" #include "ax-gdb.h" #include "dummy-frame.h" - +#include "interps.h" #include "format.h" /* readline include files */ @@ -4635,7 +4635,7 @@ bpstat_do_actions_1 (bpstat *bsp) if (breakpoint_proceeded) { - if (target_can_async_p ()) + if (interpreter_async && target_can_async_p ()) /* If we are in async mode, then the target might be still running, not stopped at any breakpoint, so nothing for us to do here -- just return to the event loop. */ diff --git a/gdb/testsuite/ChangeLog b/gdb/testsuite/ChangeLog index 7e74501..2f747b5 100644 --- a/gdb/testsuite/ChangeLog +++ b/gdb/testsuite/ChangeLog @@ -1,4 +1,12 @@ 2015-01-14 Pedro Alves + Joel Brobecker + + PR gdb/17525 + * gdb.base/bp-cmds-execution-x-script.c: New file. + * gdb.base/bp-cmds-execution-x-script.exp: New file. + * gdb.base/bp-cmds-execution-x-script.gdb: New file. + +2015-01-14 Pedro Alves PR cli/17828 * gdb.base/batch-preserve-term-settings.c: New file. diff --git a/gdb/testsuite/gdb.base/bp-cmds-execution-x-script.c b/gdb/testsuite/gdb.base/bp-cmds-execution-x-script.c new file mode 100644 index 0000000..f7101b6 --- /dev/null +++ b/gdb/testsuite/gdb.base/bp-cmds-execution-x-script.c @@ -0,0 +1,35 @@ +/* This testcase is part of GDB, the GNU debugger. + + Copyright 2015 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 . */ + +int +increment (int i) +{ + return i + 1; +} + +#define N_INCR 20 + +int +main (void) +{ + int val = 1; + int j; + + for (j = 0; j < N_INCR; j++) + val = increment (val); + return val == N_INCR; +} diff --git a/gdb/testsuite/gdb.base/bp-cmds-execution-x-script.exp b/gdb/testsuite/gdb.base/bp-cmds-execution-x-script.exp new file mode 100644 index 0000000..e75a4fd --- /dev/null +++ b/gdb/testsuite/gdb.base/bp-cmds-execution-x-script.exp @@ -0,0 +1,75 @@ +# Copyright 2015 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 . */ + +# Test that GDB isn't silent if it fails to remove a breakpoint from +# the main program, independently of whether the program was loaded +# with "file PROGRAM" or directly from the command line with "gdb +# PROGRAM". + +# Test that execution commands in a GDB script file run through -x +# work as expected. Specifically, the scripts creates a breakpoint +# that has "continue" in its command list, and then does "run". + +standard_testfile + +if {[build_executable "failed to prepare" $testfile $srcfile debug]} { + return -1 +} + +set x_file ${srcdir}/${subdir}/$testfile.gdb + +global GDBFLAGS +set saved_gdbflags $GDBFLAGS + +# Run the test proper. + +proc test {} { + global inferior_exited_re + global binfile + global gdb_prompt + global saved_gdbflags GDBFLAGS + global x_file + + gdb_exit + + set GDBFLAGS "$GDBFLAGS -x $x_file $binfile" + + set GDBFLAGS $saved_gdbflags + append GDBFLAGS " -ex \"set height unlimited\"" + append GDBFLAGS " -x \"$x_file\"" + append GDBFLAGS " --args \"$binfile\"" + + set test "run to end" + + gdb_exit + set res [gdb_spawn] + if { $res != 0} { + fail $test + return -1 + } + + gdb_test_multiple "" $test { + -re "$inferior_exited_re normally.*$gdb_prompt $" { + pass $test + } + -re "Don't know how to run.*$gdb_prompt $" { + unsupported $test + } + } +} + +test + +set GDBFLAGS $saved_gdbflags diff --git a/gdb/testsuite/gdb.base/bp-cmds-execution-x-script.gdb b/gdb/testsuite/gdb.base/bp-cmds-execution-x-script.gdb new file mode 100644 index 0000000..6d5b4e4 --- /dev/null +++ b/gdb/testsuite/gdb.base/bp-cmds-execution-x-script.gdb @@ -0,0 +1,20 @@ +# Copyright 2015 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 . */ + +break increment +commands + cont +end +run -- 2.7.4