gdb/testsuite/gdb.python/py-function.exp

# Copyright (C) 2009-2021 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 <http://www.gnu.org/licenses/>.

# This file is part of the GDB testsuite.  It tests the mechanism
# exposing convenience functions to Python.

load_lib gdb-python.exp

# Start with a fresh gdb.

gdb_exit
gdb_start
gdb_reinitialize_dir $srcdir/$subdir

# Skip all tests if Python scripting is not enabled.
if { [skip_python_tests] } { continue }

gdb_test_multiline "input convenience function" \
  "python" "" \
  "class test_func (gdb.Function):" "" \
  "  def __init__ (self):" "" \
  "    super (test_func, self).__init__ (\"test_func\")" "" \
  "  def invoke (self, arg):" "" \
  "    return \"test_func output, arg = %s\" % arg.string ()" "" \
  "test_func ()" "" \
  "end" ""

gdb_test "print \$test_func (\"ugh\")" "= \"test_func output, arg = ugh\"" "call function"

# Test returning a gdb.Value from the function. This segfaulted GDB at one point.

gdb_test_multiline "input value-returning convenience function" \
  "python" "" \
  "class Double (gdb.Function):" "" \
  "  def __init__ (self):" "" \
  "    super (Double, self).__init__ (\"double\")" "" \
  "  def invoke (self, n):" "" \
  "    return n*2" "" \
  "Double ()" "" \
  "end" ""

# Different languages can have different parsers, so lets check that
# internal functions are understood by every language.  Place auto
# last in the list so we end up back in 'auto' language mode.
foreach lang [concat [gdb_supported_languages] auto] {
    gdb_test_no_output "set language $lang"
    gdb_test "print \$double (1)" "= 2" "call value-returning function, language = $lang"
}

gdb_test_multiline "input int-returning function" \
  "python" "" \
  "class Yes(gdb.Function):" "" \
  "    def __init__(self):" "" \
  "        gdb.Function.__init__(self, 'yes')" "" \
  "    def invoke(self):" "" \
  "        return 1" "" \
  "Yes ()" "" \
  "end" ""

gdb_test "print \$yes() && \$yes()" " = 1" "call yes with &&"
gdb_test "print \$yes() || \$yes()" " = 1" "call yes with ||"

gdb_test_multiline "Test GDBError" \
  "python" "" \
  "class GDBError(gdb.Function):" "" \
  "    def __init__(self):" "" \
  "        gdb.Function.__init__(self, 'gdberror')" "" \
  "    def invoke(self):" "" \
  "        raise gdb.GdbError(\"This is a GdbError\")" "" \
  "GDBError ()" "" \
  "end" ""

gdb_test "print \$gdberror()" "This is a GdbError.*" \
    "Test GdbError.  There should not be a stack trace"

gdb_test_multiline "Test Normal Error" \
  "python" "" \
  "class NormalError(gdb.Function):" "" \
  "    def __init__(self):" "" \
  "        gdb.Function.__init__(self, 'normalerror')" "" \
  "    def invoke(self):" "" \
  "        raise RuntimeError(\"This is a Normal Error\")" "" \
  "NormalError ()" "" \
  "end" ""

gdb_test_no_output "set python print-stack full"
gdb_test "print \$normalerror()" "Traceback.*File.*line 5.*in invoke.*RuntimeError.*This is a Normal Error.*" \
    "Test a Runtime error.  There should be a stack trace."

gdb_test_multiline "input command-calling function" \
  "python" "" \
  "class CallCommand(gdb.Function):" "" \
  "    def __init__(self):" "" \
  "        gdb.Function.__init__(self, 'call_command')" "" \
  "    def invoke(self):" "" \
  "        return gdb.execute('print 1', to_string=True)" "" \
  "CallCommand ()" "" \
  "end" ""

gdb_test_no_output "set var \$foo = \$call_command()" "setting a value from a function which executes a command."
# There was a bug where GDB would segfault in the second call, so try calling again.
gdb_test_no_output "set var \$foo = \$call_command()" "setting a value from a function which executes a command, again."