gdb/testsuite/gdb.python/python-value.exp

# Copyright (C) 2008 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 values to Python.

if $tracelevel then {
    strace $tracelevel
}

set testfile "python-value"
set srcfile ${testfile}.c
set binfile ${objdir}/${subdir}/${testfile}
if { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug}] != "" } {
    untested "Couldn't compile ${srcfile}"
    return -1
}

# Usage: gdb_py_test_multiple NAME INPUT RESULT {INPUT RESULT}...
# Run a test named NAME, consisting of multiple lines of input.
# After each input line INPUT, search for result line RESULT.
# Succeed if all results are seen; fail otherwise.
proc gdb_py_test_multiple {name args} {
    global gdb_prompt
    foreach {input result} $args {
	if {[gdb_test_multiple $input "$name - $input" {
	    -re "\[\r\n\]*($result)\[\r\n\]+($gdb_prompt | *>)$" {
		pass "$name - $input"
	    }
	}]} {
	    return 1
	}
    }
    return 0
}

# Run a command in GDB, and report a failure if a Python exception is thrown.
# If report_pass is true, report a pass if no exception is thrown.
proc gdb_py_test_silent_cmd {cmd name report_pass} {
  global gdb_prompt

  gdb_test_multiple $cmd $name {
      -re "Traceback.*$gdb_prompt $"  { fail $name }
      -re "$gdb_prompt $"	      { if $report_pass { pass $name } }
  }
}

proc test_value_creation {} {
  global gdb_prompt

  gdb_py_test_silent_cmd "python i = gdb.Value (True)" "create boolean value" 1
  gdb_py_test_silent_cmd "python i = gdb.Value (5)" "create integer value" 1
  gdb_py_test_silent_cmd "python i = gdb.Value (5L)" "create long value" 1
  gdb_py_test_silent_cmd "python f = gdb.Value (1.25)" "create double value" 1
  gdb_py_test_silent_cmd "python a = gdb.Value ('string test')" "create 8-bit string value" 1
  gdb_test "python print a" "\"string test\"" "print 8-bit string"
  gdb_test "python print a.__class__" "<type 'gdb.Value'>" "verify type of 8-bit string"
  gdb_py_test_silent_cmd "python a = gdb.Value (u'unicode test')" "create unicode value" 1
  gdb_test "python print a" "\"unicode test\"" "print Unicode string"
  gdb_test "python print a.__class__" "<type 'gdb.Value'>" "verify type of unicode string"
}

proc test_value_numeric_ops {} {
  global gdb_prompt

  gdb_py_test_silent_cmd "python i = gdb.Value (5)" "create first integer value" 0
  gdb_py_test_silent_cmd "python j = gdb.Value (2)" "create second integer value" 0
  gdb_py_test_silent_cmd "python f = gdb.Value (1.25)" "create first double value" 0
  gdb_py_test_silent_cmd "python g = gdb.Value (2.5)" "create second double value" 0
  gdb_test "python print 'result = ' + str(i+j)" " = 7" "add two integer values"
  gdb_test "python print (i+j).__class__" "<type 'gdb.Value'>" "verify type of integer add result"

  gdb_test "python print 'result = ' + str(f+g)" " = 3.75" "add two double values"
  gdb_test "python print 'result = ' + str(i-j)" " = 3" "subtract two integer values"
  gdb_test "python print 'result = ' + str(f-g)" " = -1.25" "subtract two double values"
  gdb_test "python print 'result = ' + str(i*j)" " = 10" "multiply two integer values"
  gdb_test "python print 'result = ' + str(f*g)" " = 3.125" "multiply two double values"
  gdb_test "python print 'result = ' + str(i/j)" " = 2" "divide two integer values"
  gdb_test "python print 'result = ' + str(f/g)" " = 0.5" "divide two double values"
  gdb_test "python print 'result = ' + str(i%j)" " = 1" "take remainder of two integer values"
  # Remainder of float is implemented in Python but not in GDB's value system.

  gdb_test "python print 'result = ' + str(i**j)" " = 25" "integer value raised to the power of another integer value"
  gdb_test "python print 'result = ' + str(g**j)" " = 6.25" "double value raised to the power of integer value"

  gdb_test "python print 'result = ' + str(-i)" " = -5" "negated integer value"
  gdb_test "python print 'result = ' + str(+i)" " = 5" "positive integer value"
  gdb_test "python print 'result = ' + str(-f)" " = -1.25" "negated double value"
  gdb_test "python print 'result = ' + str(+f)" " = 1.25" "positive double value"
  gdb_test "python print 'result = ' + str(abs(j-i))" " = 3" "absolute of integer value"
  gdb_test "python print 'result = ' + str(abs(f-g))" " = 1.25" "absolute of double value"

  # Test gdb.Value mixed with Python types.

  gdb_test "python print 'result = ' + str(i-1)" " = 4" "subtract integer value from python integer"
  gdb_test "python print (i-1).__class__" "<type 'gdb.Value'>" "verify type of mixed integer subtraction result"
  gdb_test "python print 'result = ' + str(f+1.5)" " = 2.75" "add double value with python float"

  gdb_test "python print 'result = ' + str(1-i)" " = -4" "subtract python integer from integer value"
  gdb_test "python print 'result = ' + str(1.5+f)" " = 2.75" "add python float with double value"

  # Test pointer arithmethic

  # First, obtain the pointers
  gdb_test "print (void *) 2" "" ""
  gdb_test "python a = gdb.get_value_from_history (0)" "" ""
  gdb_test "print (void *) 5" "" ""
  gdb_test "python b = gdb.get_value_from_history (0)" "" ""

  gdb_test "python print 'result = ' + str(a+5)" " = 0x7" "add pointer value with python integer"
  gdb_test "python print 'result = ' + str(b-2)" " = 0x3" "subtract python integer from pointer value"
  gdb_test "python print 'result = ' + str(b-a)" " = 3" "subtract two pointer values"

  # Test some invalid operations.

  gdb_test_multiple "python print 'result = ' + str(i+'foo')" "catch error in python type conversion" {
      -re "Argument to arithmetic operation not a number or boolean.*$gdb_prompt $"   {pass "catch error in python type conversion"}
      -re "result = .*$gdb_prompt $"		      {fail "catch error in python type conversion"}
      -re "$gdb_prompt $"			      {fail "catch error in python type conversion"}
  }

  gdb_test_multiple "python print 'result = ' + str(i+gdb.Value('foo'))" "catch throw of GDB error" {
      -re "Traceback.*$gdb_prompt $"  {pass "catch throw of GDB error"}
      -re "result = .*$gdb_prompt $"  {fail "catch throw of GDB error"}
      -re "$gdb_prompt $"	      {fail "catch throw of GDB error"}
  }
}

proc test_value_boolean {} {
  # First, define a useful function to test booleans.
  gdb_py_test_multiple "define function to test booleans" \
    "python" "" \
    "def test_bool (val):" "" \
    "  if val:" "" \
    "    print 'yay'" "" \
    "  else:" "" \
    "    print 'nay'" "" \
    "end" ""

  gdb_test "py test_bool (gdb.Value (True))" "yay" "check evaluation of true boolean value in expression"

  gdb_test "py test_bool (gdb.Value (False))" "nay" "check evaluation of false boolean value in expression"

  gdb_test "py test_bool (gdb.Value (5))" "yay" "check evaluation of true integer value in expression"

  gdb_test "py test_bool (gdb.Value (0))" "nay" "check evaluation of false integer value in expression"

  gdb_test "py test_bool (gdb.Value (5.2))" "yay" "check evaluation of true integer value in expression"

  gdb_test "py test_bool (gdb.Value (0.0))" "nay" "check evaluation of false integer value in expression"
}

proc test_value_compare {} {
  gdb_test "py print gdb.Value (1) < gdb.Value (1)" "False" "less than, equal"
  gdb_test "py print gdb.Value (1) < gdb.Value (2)" "True" "less than, less"
  gdb_test "py print gdb.Value (2) < gdb.Value (1)" "False" "less than, greater"
  gdb_test "py print gdb.Value (2) < None" "False" "less than, None"

  gdb_test "py print gdb.Value (1) <= gdb.Value (1)" "True" "less or equal, equal"
  gdb_test "py print gdb.Value (1) <= gdb.Value (2)" "True" "less or equal, less"
  gdb_test "py print gdb.Value (2) <= gdb.Value (1)" "False" "less or equal, greater"
  gdb_test "py print gdb.Value (2) <= None" "False" "less or equal, None"

  gdb_test "py print gdb.Value (1) == gdb.Value (1)" "True" "equality of gdb.Values"
  gdb_test "py print gdb.Value (1) == gdb.Value (2)" "False" "inequality of gdb.Values"
  gdb_test "py print gdb.Value (1) == 1.0" "True" "equality of gdb.Value with Python value"
  gdb_test "py print gdb.Value (1) == 2" "False" "inequality of gdb.Value with Python value"
  gdb_test "py print gdb.Value (1) == None" "False" "inequality of gdb.Value with None"

  gdb_test "py print gdb.Value (1) != gdb.Value (1)" "False" "inequality, false"
  gdb_test "py print gdb.Value (1) != gdb.Value (2)" "True" "inequality, true"
  gdb_test "py print gdb.Value (1) != None" "True" "inequality, None"

  gdb_test "py print gdb.Value (1) > gdb.Value (1)" "False" "greater than, equal"
  gdb_test "py print gdb.Value (1) > gdb.Value (2)" "False" "greater than, less"
  gdb_test "py print gdb.Value (2) > gdb.Value (1)" "True" "greater than, greater"
  gdb_test "py print gdb.Value (2) > None" "True" "greater than, None"

  gdb_test "py print gdb.Value (1) >= gdb.Value (1)" "True" "greater or equal, equal"
  gdb_test "py print gdb.Value (1) >= gdb.Value (2)" "False" "greater or equal, less"
  gdb_test "py print gdb.Value (2) >= gdb.Value (1)" "True" "greater or equal, greater"
  gdb_test "py print gdb.Value (2) >= None" "True" "greater or equal, None"
}

proc test_value_in_inferior {} {
  global gdb_prompt
  global testfile

  gdb_breakpoint [gdb_get_line_number "break to inspect struct and union"]

  gdb_continue_to_breakpoint "break to inspect struct and union"

  # Just get inferior variable s in the value history, available to python.
  gdb_test "print s" " = {a = 3, b = 5}" ""

  gdb_py_test_silent_cmd "python s = gdb.get_value_from_history (0)" "get value from history" 1

  gdb_test "python print 'result = ' + str(s\['a'\])" " = 3" "access element inside struct using 8-bit string name"
  gdb_test "python print 'result = ' + str(s\[u'a'\])" " = 3" "access element inside struct using unicode name"

  # Test dereferencing the argv pointer

  # Just get inferior variable argv the value history, available to python.
  gdb_test "print argv" " = \\(char \\*\\*\\) 0x.*" ""

  gdb_py_test_silent_cmd "python argv = gdb.get_value_from_history (0)" "" 0
  gdb_py_test_silent_cmd "python arg0 = argv.dereference ()" "dereference value" 1

  # Check that the dereferenced value is sane
  gdb_test "python print arg0" "0x.*$testfile\"" "verify dereferenced value"
}


# Start with a fresh gdb.

gdb_exit
gdb_start
gdb_reinitialize_dir $srcdir/$subdir
gdb_load ${binfile}

gdb_test_multiple "python print 'hello, world!'" "verify python support" {
    -re "not supported.*$gdb_prompt $"	{
      unsupported "python support is disabled"
      return -1
    }
    -re "$gdb_prompt $"	{}
}

test_value_creation
test_value_numeric_ops
test_value_boolean
test_value_compare

# The following tests require execution.

if ![runto_main] then {
    fail "Can't run to main"
    return 0
}

test_value_in_inferior