From ccab2054e904cf3118da605d1c075b4f6e12e544 Mon Sep 17 00:00:00 2001 From: Joel Brobecker Date: Tue, 5 Jun 2012 13:50:13 +0000 Subject: [PATCH] stop parsing breakpoint command if invalid keyword found With an Ada program, trying to break on a specific Ada task, but with the wrong capitalization of the `task' keyword, we currently get only pieces of the "garbage" that caused the error: (gdb) b *rendez_vous'address TASK 2 Garbage 2 at end of command Pushing this a little further: (gdb) b *rendez_vous'address TASK Task TaSK 2 Garbage 2 at end of command Another interesting failure mode: (gdb) b *rendez_vous'address TASK if Argument required (expression to compute). The parser skipped `TASK', then found the `if' keyword, and thus started looking for a condition. This patch fixes the problem by aborting the parsing as soon as an invalid keyword is found. This makes it consistent with the case where the REST parameter is passed as NULL (where an error is raised immediately after seeing the first invalid keyword). It also introduces a new testcase that reproduces all above scenarios. gdb/ChangeLog: * breakpoint.c (find_condition_and_thread): Stop parsing as soon as the first invalid keyword is found. gdb/testsuite/ChangeLog: * gdb.ada/bad-task-bp-keyword: New testcase. --- gdb/ChangeLog | 5 ++ gdb/breakpoint.c | 2 +- gdb/testsuite/ChangeLog | 4 ++ gdb/testsuite/gdb.ada/bad-task-bp-keyword.exp | 52 ++++++++++++++ .../gdb.ada/bad-task-bp-keyword/foo.adb | 68 +++++++++++++++++++ 5 files changed, 130 insertions(+), 1 deletion(-) create mode 100644 gdb/testsuite/gdb.ada/bad-task-bp-keyword.exp create mode 100644 gdb/testsuite/gdb.ada/bad-task-bp-keyword/foo.adb diff --git a/gdb/ChangeLog b/gdb/ChangeLog index fed98e592b3..a1e9b5a65ad 100644 --- a/gdb/ChangeLog +++ b/gdb/ChangeLog @@ -1,3 +1,8 @@ +2012-06-05 Joel Brobecker + + * breakpoint.c (find_condition_and_thread): Stop parsing + as soon as the first invalid keyword is found. + 2012-06-05 Joel Brobecker * copyright.py (EXCLUDE_LIST): Add 'gdb/CONTRIBUTE' to list. diff --git a/gdb/breakpoint.c b/gdb/breakpoint.c index a867b10d55c..5cc1f646739 100644 --- a/gdb/breakpoint.c +++ b/gdb/breakpoint.c @@ -8940,7 +8940,7 @@ find_condition_and_thread (char *tok, CORE_ADDR pc, else if (rest) { *rest = savestring (tok, strlen (tok)); - tok += toklen; + return; } else error (_("Junk at end of arguments.")); diff --git a/gdb/testsuite/ChangeLog b/gdb/testsuite/ChangeLog index f82ce3fccdf..0bab843f0ab 100644 --- a/gdb/testsuite/ChangeLog +++ b/gdb/testsuite/ChangeLog @@ -1,3 +1,7 @@ +2012-06-05 Joel Brobecker + + * gdb.ada/bad-task-bp-keyword: New testcase. + 2012-06-03 Jan Kratochvil * gdb.base/code_elim.exp (add-symbol-file ${testfile1} 0x100000): diff --git a/gdb/testsuite/gdb.ada/bad-task-bp-keyword.exp b/gdb/testsuite/gdb.ada/bad-task-bp-keyword.exp new file mode 100644 index 00000000000..2d2c891dc1e --- /dev/null +++ b/gdb/testsuite/gdb.ada/bad-task-bp-keyword.exp @@ -0,0 +1,52 @@ +# Copyright 2012 Free Software Foundation, Inc. +# +# This program is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; either version 3 of the License, or +# (at your option) any later version. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with this program. If not, see . + +load_lib "ada.exp" + +set testdir "bad-task-bp-keyword" +set testfile "${testdir}/foo" +set srcfile ${srcdir}/${subdir}/${testfile}.adb +set binfile ${objdir}/${subdir}/${testfile} + +file mkdir ${objdir}/${subdir}/${testdir} +if {[gdb_compile_ada "${srcfile}" "${binfile}" executable [list debug ]] != "" } { + return -1 +} + +clean_restart ${testfile} + +# Star the program in order to have some tasks running... +set bp_location [gdb_get_line_number "STOP_HERE" ${testdir}/foo.adb] +runto "foo.adb:$bp_location" + +# Try inserting a breakpoint on task 2, but using the wrong capitalization +# on the 'task' keyword ("TASK" instead of "task"). The debugger should +# report an error. Try various weird combinations too. + +gdb_test "break *break_me'address TASK 2" \ + "Garbage 'TASK 2' at end of command" + +set test "break *break_me'address TASK Task TaSK 2" +gdb_test_multiple "$test" $test { + -re "Garbage 'TASK Task TaSK 2' at end of command\[\r\n\]+$gdb_prompt $" { + pass $test + } + -re "Garbage 'TaSK 2' at end of command\[\r\n\]+$gdb_prompt $" { + kfail gdb/14111 "$test" + } +} + +gdb_test "break *break_me'address TASK if" \ + "Garbage 'TASK if' at end of command" diff --git a/gdb/testsuite/gdb.ada/bad-task-bp-keyword/foo.adb b/gdb/testsuite/gdb.ada/bad-task-bp-keyword/foo.adb new file mode 100644 index 00000000000..76ed98b8dc5 --- /dev/null +++ b/gdb/testsuite/gdb.ada/bad-task-bp-keyword/foo.adb @@ -0,0 +1,68 @@ +-- Copyright 2009-2012 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 . + +procedure Foo is + + task type Caller is + entry Initialize; + entry Call_Break_Me; + entry Finalize; + end Caller; + type Caller_Ptr is access Caller; + + procedure Break_Me is + begin + null; + end Break_Me; + + task body Caller is + begin + accept Initialize do + null; + end Initialize; + accept Call_Break_Me do + Break_Me; + end Call_Break_Me; + accept Finalize do + null; + end Finalize; + end Caller; + + Task_List : array (1 .. 3) of Caller_Ptr; + +begin + + -- Start all our tasks, and call the "Initialize" entry to make + -- sure all of them have now been started. We call that entry + -- immediately after having created the task in order to make sure + -- that we wait for that task to be created before we try to create + -- another one. That way, we know that the order in our Task_List + -- corresponds to the order in the GNAT runtime. + for J in Task_List'Range loop + Task_List (J) := new Caller; + Task_List (J).Initialize; + end loop; + + -- Next, call their Call_Break_Me entry of each task, using the same + -- order as the order used to create them. + for J in Task_List'Range loop -- STOP_HERE + Task_List (J).Call_Break_Me; + end loop; + + -- And finally, let all the tasks die... + for J in Task_List'Range loop + Task_List (J).Finalize; + end loop; +end Foo; -- 2.30.2