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

   1 # Copyright (C) 2008-2021 Free Software Foundation, Inc.
   2
   3 # This program is free software; you can redistribute it and/or modify
   4 # it under the terms of the GNU General Public License as published by
   5 # the Free Software Foundation; either version 3 of the License, or
   6 # (at your option) any later version.
   7 #
   8 # This program is distributed in the hope that it will be useful,
   9 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  10 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11 # GNU General Public License for more details.
  12 #
  13 # You should have received a copy of the GNU General Public License
  14 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  15
  16 # This file is part of the GDB testsuite.  It tests the mechanism
  17 # exposing values to Python.
  18
  19 load_lib gdb-python.exp
  20
  21 standard_testfile
  22
  23 set has_argv0 [gdb_has_argv0]
  24
  25 # Build inferior to language specification.
  26 # LANG is one of "c" or "c++".
  27 proc build_inferior {exefile lang} {
  28   global srcdir subdir srcfile testfile hex
  29
  30   # Use different names for .o files based on the language.
  31   # For Fission, the debug info goes in foo.dwo and we don't want,
  32   # for example, a C++ compile to clobber the dwo of a C compile.
  33   # ref: http://gcc.gnu.org/wiki/DebugFission
  34   switch ${lang} {
  35       "c" { set filename ${testfile}.o }
  36       "c++" { set filename ${testfile}-cxx.o }
  37   }
  38   set objfile [standard_output_file $filename]
  39
  40   if { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${objfile}" object "debug $lang"] != ""
  41        || [gdb_compile "${objfile}" "${exefile}" executable "debug $lang"] != "" } {
  42       untested "failed to compile in $lang mode"
  43       return -1
  44   }
  45   return 0
  46 }
  47
  48 proc test_value_creation {} {
  49   global gdb_prompt
  50   global gdb_py_is_py3k
  51
  52   gdb_py_test_silent_cmd "python i = gdb.Value (True)" "create boolean value" 1
  53   gdb_py_test_silent_cmd "python i = gdb.Value (5)" "create integer value" 1
  54   if { $gdb_py_is_py3k == 0 } {
  55     gdb_py_test_silent_cmd "python i = gdb.Value (5L)" "create long value" 1
  56   }
  57
  58   gdb_py_test_silent_cmd "python l = gdb.Value(0xffffffff12345678)" "create large unsigned 64-bit value" 1
  59   if { $gdb_py_is_py3k == 0 } {
  60     gdb_test "python print long(l)" "18446744069720004216" "large unsigned 64-bit int conversion to python"
  61   } else {
  62     gdb_test "python print (int(l))" "18446744069720004216" "large unsigned 64-bit int conversion to python"
  63   }
  64
  65   gdb_py_test_silent_cmd "python f = gdb.Value (1.25)" "create double value" 1
  66   gdb_py_test_silent_cmd "python a = gdb.Value ('string test')" "create 8-bit string value" 1
  67   gdb_test "python print (a)" "\"string test\"" "print 8-bit string"
  68   gdb_test "python print (a.__class__)" "<(type|class) 'gdb.Value'>" "verify type of 8-bit string"
  69
  70   if { $gdb_py_is_py3k == 0 } {
  71     gdb_py_test_silent_cmd "python a = gdb.Value (u'unicode test')" "create unicode value" 1
  72     gdb_test "python print (a)" "\"unicode test\"" "print Unicode string"
  73     gdb_test "python print (a.__class__)" "<(type|class) 'gdb.Value'>" "verify type of unicode string"
  74   }
  75
  76   # Test address attribute is None in a non-addressable value
  77   gdb_test "python print ('result = %s' % i.address)" "= None" "test address attribute in non-addressable value"
  78 }
  79
  80 proc test_value_numeric_ops {} {
  81   global gdb_prompt
  82   global gdb_py_is_py3k
  83
  84   gdb_py_test_silent_cmd "python i = gdb.Value (5)" "create first integer value" 0
  85   gdb_py_test_silent_cmd "python j = gdb.Value (2)" "create second integer value" 0
  86   gdb_py_test_silent_cmd "python f = gdb.Value (1.25)" "create first double value" 0
  87   gdb_py_test_silent_cmd "python g = gdb.Value (2.5)" "create second double value" 0
  88   gdb_test "python print ('result = ' + str(i+j))" " = 7" "add two integer values"
  89   gdb_test "python print ((i+j).__class__)" "<(type|class) 'gdb.Value'>" "verify type of integer add result"
  90
  91   gdb_test "python print ('result = ' + str(f+g))" " = 3.75" "add two double values"
  92   gdb_test "python print ('result = ' + str(i-j))" " = 3" "subtract two integer values"
  93   gdb_test "python print ('result = ' + str(f-g))" " = -1.25" "subtract two double values"
  94   gdb_test "python print ('result = ' + str(i*j))" " = 10" "multiply two integer values"
  95   gdb_test "python print ('result = ' + str(f*g))" " = 3.125" "multiply two double values"
  96   gdb_test "python print ('result = ' + str(i/j))" " = 2" "divide two integer values"
  97   gdb_test "python print ('result = ' + str(f/g))" " = 0.5" "divide two double values"
  98   gdb_test "python print ('result = ' + str(i%j))" " = 1" "take remainder of two integer values"
  99   # Remainder of float is implemented in Python but not in GDB's value system.
 100
 101   gdb_test "python print ('result = ' + str(i**j))" " = 25" "integer value raised to the power of another integer value"
 102   gdb_test "python print ('result = ' + str(g**j))" " = 6.25" "double value raised to the power of integer value"
 103
 104   gdb_test "python print ('result = ' + str(-i))" " = -5" "negated integer value"
 105   gdb_test "python print ('result = ' + str(+i))" " = 5" "positive integer value"
 106   gdb_test "python print ('result = ' + str(-f))" " = -1.25" "negated double value"
 107   gdb_test "python print ('result = ' + str(+f))" " = 1.25" "positive double value"
 108   gdb_test "python print ('result = ' + str(abs(j-i)))" " = 3" "absolute of integer value"
 109   gdb_test "python print ('result = ' + str(abs(f-g)))" " = 1.25" "absolute of double value"
 110
 111   # Test gdb.Value mixed with Python types.
 112
 113   gdb_test "python print ('result = ' + str(i-1))" " = 4" "subtract integer value from python integer"
 114   gdb_test "python print ((i-1).__class__)" "<(type|class) 'gdb.Value'>" "verify type of mixed integer subtraction result"
 115   gdb_test "python print ('result = ' + str(f+1.5))" " = 2.75" "add double value with python float"
 116
 117   gdb_test "python print ('result = ' + str(1-i))" " = -4" "subtract python integer from integer value"
 118   gdb_test "python print ('result = ' + str(1.5+f))" " = 2.75" "add python float with double value"
 119
 120   # Conversion test.
 121   gdb_test "print evalue" " = TWO"
 122   gdb_test_no_output "python evalue = gdb.history (0)"
 123   gdb_test "python print (int (evalue))" "2"
 124
 125   # Test pointer arithmethic
 126
 127   # First, obtain the pointers
 128   gdb_test "print (void *) 2" ".*" ""
 129   gdb_test_no_output "python a = gdb.history (0)" ""
 130   gdb_test "print (void *) 5" ".*" ""
 131   gdb_test_no_output "python b = gdb.history (0)" ""
 132
 133   gdb_test "python print(int(b))" "5" "convert pointer to int"
 134   if {!$gdb_py_is_py3k} {
 135     gdb_test "python print(long(b))" "5" "convert pointer to long"
 136   }
 137
 138   gdb_test "python print ('result = ' + str(a+5))" " = 0x7( <.*>)?" "add pointer value with python integer"
 139   gdb_test "python print ('result = ' + str(b-2))" " = 0x3( <.*>)?" "subtract python integer from pointer value"
 140   gdb_test "python print ('result = ' + str(b-a))" " = 3" "subtract two pointer values"
 141
 142   gdb_test "python print ('result = ' + 'result'\[gdb.Value(0)\])" \
 143     "result = r" "use value as string index"
 144   gdb_test "python print ('result = ' + str((1,2,3)\[gdb.Value(0)\]))" \
 145     "result = 1" "use value as tuple index"
 146   if {!$gdb_py_is_py3k} {
 147     gdb_test "python print ('result = ' + str(\[1,2,3\]\[gdb.Value(0)\]))" \
 148       "result = 1" "use value as array index"
 149   }
 150
 151   gdb_test "python print('%x' % int(gdb.parse_and_eval('-1ull')))" \
 152       "f+" "int conversion respect type sign"
 153   if {!$gdb_py_is_py3k} {
 154     gdb_test "python print('%x' % long(gdb.parse_and_eval('-1ull')))" \
 155       "f+" "long conversion respect type sign"
 156   }
 157
 158   # Test some invalid operations.
 159
 160   gdb_test_multiple "python print ('result = ' + str(i+'foo'))" "catch error in python type conversion" {
 161       -re "Argument to arithmetic operation not a number or boolean.*$gdb_prompt $"   {pass "catch error in python type conversion"}
 162       -re "result = .*$gdb_prompt $"                  {fail "catch error in python type conversion"}
 163       -re "$gdb_prompt $"                             {fail "catch error in python type conversion"}
 164   }
 165
 166   gdb_test_multiple "python print ('result = ' + str(i+gdb.Value('foo')))" "catch throw of GDB error" {
 167       -re "Traceback.*$gdb_prompt $"  {pass "catch throw of GDB error"}
 168       -re "result = .*$gdb_prompt $"  {fail "catch throw of GDB error"}
 169       -re "$gdb_prompt $"             {fail "catch throw of GDB error"}
 170   }
 171 }
 172
 173 proc test_value_boolean {} {
 174   # First, define a useful function to test booleans.
 175   gdb_test_multiline "define function to test booleans" \
 176     "python" "" \
 177     "def test_bool (val):" "" \
 178     "  if val:" "" \
 179     "    print ('yay')" "" \
 180     "  else:" "" \
 181     "    print ('nay')" "" \
 182     "end" ""
 183
 184   gdb_test "py test_bool (gdb.Value (True))" "yay" "check evaluation of true boolean value in expression"
 185
 186   gdb_test "py test_bool (gdb.Value (False))" "nay" "check evaluation of false boolean value in expression"
 187
 188   gdb_test "py test_bool (gdb.Value (5))" "yay" "check evaluation of true integer value in expression"
 189
 190   gdb_test "py test_bool (gdb.Value (0))" "nay" "check evaluation of false integer value in expression"
 191
 192   gdb_test "py test_bool (gdb.Value (5.2))" "yay" "check evaluation of true float value in expression"
 193
 194   gdb_test "py test_bool (gdb.Value (0.0))" "nay" "check evaluation of false float value in expression"
 195 }
 196
 197 proc test_value_compare {} {
 198   gdb_test "py print (gdb.Value (1) < gdb.Value (1))" "False" "less than, equal"
 199   gdb_test "py print (gdb.Value (1) < gdb.Value (2))" "True" "less than, less"
 200   gdb_test "py print (gdb.Value (2) < gdb.Value (1))" "False" "less than, greater"
 201   gdb_test "py print (gdb.Value (2) < None)" "False" "less than, None"
 202
 203   gdb_test "py print (gdb.Value (1) <= gdb.Value (1))" "True" "less or equal, equal"
 204   gdb_test "py print (gdb.Value (1) <= gdb.Value (2))" "True" "less or equal, less"
 205   gdb_test "py print (gdb.Value (2) <= gdb.Value (1))" "False" "less or equal, greater"
 206   gdb_test "py print (gdb.Value (2) <= None)" "False" "less or equal, None"
 207
 208   gdb_test "py print (gdb.Value (1) == gdb.Value (1))" "True" "equality of gdb.Values"
 209   gdb_test "py print (gdb.Value (1) == gdb.Value (2))" "False" "inequality of gdb.Values"
 210   gdb_test "py print (gdb.Value (1) == 1.0)" "True" "equality of gdb.Value with Python value"
 211   gdb_test "py print (gdb.Value (1) == 2)" "False" "inequality of gdb.Value with Python value"
 212   gdb_test "py print (gdb.Value (1) == None)" "False" "inequality of gdb.Value with None"
 213
 214   gdb_test "py print (gdb.Value (1) != gdb.Value (1))" "False" "inequality, false"
 215   gdb_test "py print (gdb.Value (1) != gdb.Value (2))" "True" "inequality, true"
 216   gdb_test "py print (gdb.Value (1) != None)" "True" "inequality, None"
 217
 218   gdb_test "py print (gdb.Value (1) > gdb.Value (1))" "False" "greater than, equal"
 219   gdb_test "py print (gdb.Value (1) > gdb.Value (2))" "False" "greater than, less"
 220   gdb_test "py print (gdb.Value (2) > gdb.Value (1))" "True" "greater than, greater"
 221   gdb_test "py print (gdb.Value (2) > None)" "True" "greater than, None"
 222
 223   gdb_test "py print (gdb.Value (1) >= gdb.Value (1))" "True" "greater or equal, equal"
 224   gdb_test "py print (gdb.Value (1) >= gdb.Value (2))" "False" "greater or equal, less"
 225   gdb_test "py print (gdb.Value (2) >= gdb.Value (1))" "True" "greater or equal, greater"
 226   gdb_test "py print (gdb.Value (2) >= None)" "True" "greater or equal, None"
 227 }
 228
 229 proc test_value_in_inferior {} {
 230   global gdb_prompt
 231   global testfile
 232   global gdb_py_is_py3k
 233
 234   gdb_breakpoint [gdb_get_line_number "break to inspect struct and union"]
 235   gdb_continue_to_breakpoint "break to inspect struct and union"
 236
 237   # Just get inferior variable s in the value history, available to python.
 238   gdb_test "print s" " = {a = 3, b = 5}" ""
 239
 240   gdb_py_test_silent_cmd "python s = gdb.history (0)" "get value s from history" 1
 241
 242   gdb_test "python print ('result = ' + str(s\['a'\]))" " = 3" "access element inside struct using 8-bit string name"
 243   if { $gdb_py_is_py3k == 0 } {
 244     gdb_test "python print ('result = ' + str(s\[u'a'\]))" " = 3" "access element inside struct using unicode name"
 245   }
 246
 247   # Test dereferencing the argv pointer
 248
 249   # Just get inferior variable argv the value history, available to python.
 250   gdb_test "print argv" " = \\(char \\*\\*\\) 0x.*" ""
 251
 252   gdb_py_test_silent_cmd "python argv = gdb.history (0)" "" 0
 253   gdb_py_test_silent_cmd "python arg0 = argv.dereference ()" "dereference value" 1
 254
 255   # Check that the dereferenced value is sane
 256   global has_argv0
 257   set test "verify dereferenced value"
 258   if { $has_argv0 } {
 259     gdb_test_no_output "set print elements unlimited" ""
 260     gdb_test_no_output "set print repeats unlimited" ""
 261     gdb_test "python print (arg0)" "0x.*$testfile\"" $test
 262   } else {
 263     unsupported $test
 264   }
 265
 266   # Smoke-test is_optimized_out attribute
 267   gdb_test "python print ('result = %s' % arg0.is_optimized_out)" "= False" "test is_optimized_out attribute"
 268
 269   # Test address attribute
 270   gdb_test "python print ('result = %s' % arg0.address)" "= 0x\[\[:xdigit:\]\]+" "test address attribute"
 271
 272   # Test displaying a variable that is temporarily at a bad address.
 273   # But if we can examine what's at memory address 0, then we'll also be
 274   # able to display it without error.  Don't run the test in that case.
 275   set can_read_0 [is_address_zero_readable]
 276
 277   # Test memory error.
 278   set test "parse_and_eval with memory error"
 279   if {$can_read_0} {
 280     untested $test
 281   } else {
 282     gdb_test "python print (gdb.parse_and_eval('*(int*)0'))" "gdb.MemoryError: Cannot access memory at address 0x0.*" $test
 283   }
 284
 285   # Test Python lazy value handling
 286   set test "memory error and lazy values"
 287   if {$can_read_0} {
 288     untested $test
 289   } else {
 290     gdb_test "python inval = gdb.parse_and_eval('*(int*)0')"
 291     gdb_test "python print (inval.is_lazy)" "True"
 292     gdb_test "python inval2 = inval+1" \
 293         "gdb.MemoryError: Cannot access memory at address 0x0.*" \
 294         "$test, first test"
 295     gdb_test "python inval.fetch_lazy ()" \
 296         "gdb.MemoryError: Cannot access memory at address 0x0.*" \
 297         "$test, second test"
 298   }
 299   set argc_value [get_integer_valueof "argc" 0]
 300   gdb_test "python argc_lazy = gdb.parse_and_eval('argc')"
 301   gdb_test "python argc_notlazy = gdb.parse_and_eval('argc')"
 302   gdb_test "python argc_notlazy.fetch_lazy()"
 303   gdb_test "python print (argc_lazy.is_lazy)" "True" \
 304       "python print (argc_lazy.is_lazy) the first time"
 305   gdb_test "python print (argc_notlazy.is_lazy)" "False"
 306   gdb_test "print argc" " = $argc_value" "sanity check argc"
 307   gdb_test "python print (argc_lazy.is_lazy)" "\r\nTrue" \
 308       "python print (argc_lazy.is_lazy) the second time"
 309   gdb_test_no_output "set argc=[expr $argc_value + 1]" "change argc"
 310   gdb_test "python print (argc_notlazy)" "\r\n$argc_value"
 311   gdb_test "python print (argc_lazy)" "\r\n[expr $argc_value + 1]"
 312   gdb_test "python print (argc_lazy.is_lazy)" "False"
 313
 314   # Test string fetches,  both partial and whole.
 315   gdb_test "print st" "\"divide et impera\""
 316   gdb_py_test_silent_cmd "python st = gdb.history (0)" "get value st from history" 1
 317   gdb_test "python print (st.string ())"  "divide et impera"  "Test string with no length"
 318   gdb_test "python print (st.string (length = -1))" "divide et impera" "test string (length = -1) is all of the string"
 319   gdb_test "python print (st.string (length = 6))" "divide"
 320   gdb_test "python print (\"---\"+st.string (length = 0)+\"---\")" "------" "test string (length = 0) is empty"
 321   gdb_test "python print (len(st.string (length = 0)))" "0" "test length is 0"
 322
 323   # We choose Ada here to test a language where c_style_arrays is
 324   # false.
 325   gdb_test "set lang ada" \
 326       "Warning: the current language does not match this frame."
 327   gdb_test "python print (st.string ())"  "divide et impera"  \
 328       "Test string with no length in ada"
 329   gdb_test_no_output "set lang auto"
 330
 331   # Fetch a string that has embedded nulls.
 332   gdb_test "print nullst" "\"divide\\\\000et\\\\000impera\".*"
 333   gdb_py_test_silent_cmd "python nullst = gdb.history (0)" "get value nullst from history" 1
 334   gdb_test "python print (nullst.string ())" "divide" "test string to first null"
 335   # Python cannot print strings that contain the null (\0) character.
 336   # For the purposes of this test, use repr()
 337   gdb_py_test_silent_cmd "python nullst = nullst.string (length = 9)" "get string beyond null" 1
 338   gdb_test "python print (repr(nullst))" "u?'divide\\\\x00et'"
 339
 340   # Test fetching a string longer than its declared (in C) size.
 341   # PR 16286
 342   gdb_py_test_silent_cmd "python xstr = gdb.parse_and_eval('xstr')" "get xstr" 1
 343   gdb_test "python print(xstr\['text'\].string (length = xstr\['length'\]))" "x{100}" \
 344     "read string beyond declared size"
 345
 346   # However it shouldn't be possible to fetch past the end of a
 347   # non-memory value.
 348   gdb_py_test_silent_cmd "python str = '\"str\"'" "set up str variable" 1
 349   gdb_test "python print (gdb.parse_and_eval (str).string (length = 10))" \
 350       "gdb.error: Attempt to take address of value not located in memory.\r\nError while executing Python code."
 351 }
 352
 353 proc test_inferior_function_call {} {
 354     global gdb_prompt hex decimal
 355
 356     # Correct inferior call without arguments.
 357     gdb_test "p/x fp1" " = $hex.*"
 358     gdb_py_test_silent_cmd "python fp1 = gdb.history (0)" "get value fp1 from history" 1
 359     gdb_test "python fp1 = fp1.dereference()" ""
 360     gdb_test "python result = fp1()" ""
 361     gdb_test "python print (result)" "void"
 362
 363     # Correct inferior call with arguments.
 364     gdb_test "p/x fp2" " = $hex.*" \
 365         "print fp2 to place it into history"
 366     gdb_py_test_silent_cmd "python fp2 = gdb.history (0)" "get value fp2 from history" 1
 367     gdb_test "python fp2 = fp2.dereference()" ""
 368     gdb_test "python result2 = fp2(10,20)" ""
 369     gdb_test "python print (result2)" "30"
 370
 371     # Incorrect to call an int value.
 372     gdb_test "p i" " = $decimal.*"
 373     gdb_py_test_silent_cmd "python i = gdb.history (0)" "get value i from history" 1
 374     gdb_test "python result3 = i()" ".*Value is not callable.*"
 375
 376     # Incorrect number of arguments.
 377     gdb_test "p/x fp2" " = $hex.*" \
 378         "print fp2 again to place it into history"
 379     gdb_py_test_silent_cmd "python fp3 = gdb.history (0)" "get value fp3 from history" 1
 380     gdb_test "python fp3 = fp3.dereference()" ""
 381     gdb_test "python result2 = fp3(10)" ".*Too few arguments in function call.*"
 382 }
 383
 384 # A few objfile tests.
 385 proc test_objfiles {} {
 386     gdb_test "python\nok=False\nfor file in gdb.objfiles():\n  if 'py-value' in file.filename:\n    ok=True\nprint (ok)\nend" "True" \
 387              "py-value in file.filename"
 388
 389     gdb_test "python print (gdb.objfiles()\[0\].pretty_printers)" "\\\[\\\]"
 390
 391     gdb_test "python gdb.objfiles()\[0\].pretty_printers = 0" \
 392       "pretty_printers attribute must be a list.*Error while executing Python code."
 393 }
 394
 395 proc test_value_after_death {} {
 396   # Construct a type while the inferior is still running.
 397   gdb_py_test_silent_cmd "python ptrtype = gdb.lookup_type('PTR')" \
 398     "create PTR type" 1
 399
 400   # Kill the inferior and remove the symbols.
 401   gdb_test "kill" "" "kill the inferior" \
 402     "Kill the program being debugged. .y or n. $" \
 403     "y"
 404   gdb_test "file" "" "discard the symbols" \
 405     "Discard symbol table from.*y or n. $" \
 406     "y"
 407
 408   # Now create a value using that type.  Relies on arg0, created by
 409   # test_value_in_inferior.
 410   gdb_py_test_silent_cmd "python castval = arg0.cast(ptrtype.pointer())" \
 411     "cast arg0 to PTR" 1
 412
 413   # Make sure the type is deleted.
 414   gdb_py_test_silent_cmd "python ptrtype = None" \
 415     "delete PTR type" 1
 416
 417   # Now see if the value's type is still valid.
 418   gdb_test "python print (castval.type)" "PTR ." \
 419     "print value's type"
 420 }
 421
 422 # Regression test for invalid subscript operations.  The bug was that
 423 # the type of the value was not being checked before allowing a
 424 # subscript operation to proceed.
 425
 426 proc test_subscript_regression {exefile lang} {
 427  # Start with a fresh gdb.
 428  clean_restart ${exefile}
 429
 430  if ![runto_main ] then {
 431      perror "couldn't run to breakpoint"
 432      return
 433  }
 434
 435  if {$lang == "c++"} {
 436      gdb_breakpoint [gdb_get_line_number "break to inspect pointer by reference"]
 437      gdb_continue_to_breakpoint "break to inspect pointer by reference"
 438
 439      gdb_py_test_silent_cmd "print rptr_int" \
 440          "Obtain address" 1
 441      gdb_py_test_silent_cmd "python rptr = gdb.history(0)" \
 442          "Obtains value from GDB" 1
 443      gdb_test "python print (rptr\[0\])" "2" "check pointer passed as reference"
 444
 445      # Just the most basic test of dynamic_cast -- it is checked in
 446      # the C++ tests.
 447      gdb_test "python print (bool(gdb.parse_and_eval('base').dynamic_cast(gdb.lookup_type('Derived').pointer())))" \
 448          True
 449
 450      # Likewise.
 451      gdb_test "python print (gdb.parse_and_eval('base').dynamic_type)" \
 452          "Derived \[*\]"
 453      gdb_test "python print (gdb.parse_and_eval('base_ref').dynamic_type)" \
 454          "Derived \[&\]"
 455      # A static type case.
 456      gdb_test "python print (gdb.parse_and_eval('5').dynamic_type)" \
 457          "int"
 458  }
 459
 460  gdb_breakpoint [gdb_get_line_number "break to inspect struct and union"]
 461  gdb_continue_to_breakpoint \
 462      "break to inspect struct and union for subscript regression test"
 463
 464  gdb_py_test_silent_cmd "python intv = gdb.Value(1)" \
 465      "Create value intv for subscript test" 1
 466  gdb_py_test_silent_cmd "python stringv = gdb.Value(\"foo\")" \
 467      "Create value stringv for subscript test" 1
 468
 469  # Try to access an int with a subscript.  This should fail.
 470  gdb_test "python print (intv)" "1" "baseline print of an int Python value"
 471  gdb_test "python print (intv\[0\])" "gdb.error: Cannot subscript requested type.*" \
 472      "Attempt to access an integer with a subscript"
 473
 474  # Try to access a string with a subscript.  This should pass.
 475  gdb_test "python print (stringv)" "foo." "baseline print of a string Python value"
 476  gdb_test "python print (stringv\[0\])" "f." "attempt to access a string with a subscript"
 477
 478  # Try to access an int array via a pointer with a subscript.  This should pass.
 479  gdb_py_test_silent_cmd "print p" "Build pointer to array" 1
 480  gdb_py_test_silent_cmd "python pointer = gdb.history(0)" "fetch pointer" 0
 481  gdb_test "python print (pointer\[0\])" "1" "access array via pointer with int subscript"
 482  gdb_test "python print (pointer\[intv\])" "2" "access array via pointer with value subscript"
 483
 484  # Try to access a single dimension array with a subscript to the
 485  # result.  This should fail.
 486  gdb_test "python print (pointer\[intv\]\[0\])" "gdb.error: Cannot subscript requested type.*" \
 487      "Attempt to access a single dimension array with a two subscripts"
 488
 489  # Lastly, test subscript access to an array with multiple
 490  # dimensions.  This should pass.
 491  gdb_py_test_silent_cmd "print {\"fu \",\"foo\",\"bar\"}" "Build array" 1
 492  gdb_py_test_silent_cmd "python marray = gdb.history(0)" "fetch marray" 0
 493  gdb_test "python print (marray\[1\]\[2\])" "o." "test multiple subscript"
 494 }
 495
 496 # A few tests of gdb.parse_and_eval.
 497 proc test_parse_and_eval {} {
 498   gdb_test "python print (gdb.parse_and_eval ('23'))" "23" \
 499     "parse_and_eval constant test"
 500   gdb_test "python print (gdb.parse_and_eval ('5 + 7'))" "12" \
 501     "parse_and_eval simple expression test"
 502   gdb_test "python print (type(gdb.parse_and_eval ('5 + 7')))" \
 503     ".(type|class) 'gdb.Value'."\
 504     "parse_and_eval type test"
 505 }
 506
 507 # Test that values are hashable.
 508 proc test_value_hash {} {
 509   gdb_test_multiline "Simple Python value dictionary" \
 510     "python" "" \
 511     "one = gdb.Value(1)" "" \
 512     "two = gdb.Value(2)" "" \
 513     "three = gdb.Value(3)" "" \
 514     "vdict = {one:\"one str\",two:\"two str\",three:\"three str\"}" "" \
 515     "end"
 516     gdb_test "python print (vdict\[one\])" "one str" "test dictionary hash for one"
 517     gdb_test "python print (vdict\[two\])" "two str" "test dictionary hash for two"
 518     gdb_test "python print (vdict\[three\])" "three str" "test dictionary hash for three"
 519     gdb_test "python print (one.__hash__() == hash(one))" "True" "test inbuilt hash"
 520 }
 521
 522 proc test_float_conversion {} {
 523     global gdb_py_is_py3k
 524     gdb_test "python print(int(gdb.Value(0)))" "0"
 525     gdb_test "python print(int(gdb.Value(2.5)))" "2"
 526     if {!$gdb_py_is_py3k} {
 527         gdb_test "python print(long(gdb.Value(0)))" "0"
 528         gdb_test "python print(long(gdb.Value(2.5)))" "2"
 529     }
 530     gdb_test "python print(float(gdb.Value(2.5)))" "2\\.5"
 531     gdb_test "python print(float(gdb.Value(0)))" "0\\.0"
 532 }
 533
 534 proc test_value_from_buffer {} {
 535   global gdb_prompt
 536   global gdb_py_is_py3k
 537
 538   gdb_py_test_silent_cmd "python tp=gdb.lookup_type('int')" "look up int type" 0
 539   gdb_py_test_silent_cmd "python size_a=gdb.parse_and_eval('sizeof(a)')" \
 540                          "find size of a" 0
 541   gdb_py_test_silent_cmd "python size_a0=gdb.parse_and_eval('sizeof(a\[0\])')" \
 542                          "find size of element of a" 0
 543   gdb_py_test_silent_cmd "python addr=gdb.parse_and_eval('&a')" \
 544                          "find address of a" 0
 545   gdb_py_test_silent_cmd "python b=gdb.selected_inferior().read_memory(addr,size_a)" \
 546                          "read buffer from memory" 1
 547   gdb_test "python v=gdb.Value(b,tp); print(v)" "1" \
 548             "construct value from buffer"
 549   gdb_test "python v=gdb.Value(b\[size_a0:\],tp); print(v)" "2" \
 550             "convert 2nd elem of buffer to value"
 551   gdb_test "python v=gdb.Value(b\[2*size_a0:\],tp); print(v)" "3" \
 552            "convert 3rd elem of buffer to value"
 553   gdb_test "python v=gdb.Value(b\[2*size_a0+1:\],tp); print(v)" \
 554            "ValueError: Size of type is larger than that of buffer object\..*" \
 555            "attempt to convert smaller buffer than size of type"
 556   gdb_py_test_silent_cmd "python atp=tp.array(2) ; print(atp)" \
 557                          "make array type" 0
 558   gdb_py_test_silent_cmd "python va=gdb.Value(b,atp)" \
 559                          "construct array value from buffer" 0
 560   gdb_test "python print(va)" "\\{1, 2, 3\\}" "print array value"
 561   gdb_test "python print(va\[0\])" "1" "print first array element"
 562   gdb_test "python print(va\[1\])" "2" "print second array element"
 563   gdb_test "python print(va\[2\])" "3" "print third array element"
 564   gdb_test "python print(va\[3\])" "gdb\.error: no such vector element.*" \
 565            "print out of bounds array element"
 566   gdb_py_test_silent_cmd "python atpbig=tp.array(3)" "make bigger array type" 0
 567   gdb_test "python vabig=gdb.Value(b,atpbig)" \
 568            "ValueError: Size of type is larger than that of buffer object\..*" \
 569            "attempt to construct large value with small buffer"
 570   gdb_test "python v=gdb.Value(2048,tp)" \
 571            "TypeError: Object must support the python buffer protocol\..*" \
 572            "attempt to construct value from buffer with non-buffer object"
 573   gdb_test "python v=gdb.Value(b,'int'); print(v)" \
 574            "TypeError: type argument must be a gdb\.Type\..*" \
 575            "attempt to construct value with string as type"
 576 }
 577
 578 # Build C version of executable.  C++ is built later.
 579 if { [build_inferior "${binfile}" "c"] < 0 } {
 580     return -1
 581 }
 582
 583 # Start with a fresh gdb.
 584 clean_restart ${binfile}
 585
 586 # Skip all tests if Python scripting is not enabled.
 587 if { [skip_python_tests] } { continue }
 588
 589 test_value_creation
 590 test_value_numeric_ops
 591 test_value_boolean
 592 test_value_compare
 593 test_objfiles
 594 test_parse_and_eval
 595 test_value_hash
 596 test_float_conversion
 597
 598 # The following tests require execution.
 599
 600 if ![runto_main] then {
 601     fail "can't run to main"
 602     return 0
 603 }
 604
 605 test_value_in_inferior
 606 test_value_from_buffer
 607 test_inferior_function_call
 608 test_value_after_death
 609
 610 # Test either C or C++ values.
 611
 612 test_subscript_regression "${binfile}" "c"
 613
 614 if ![skip_cplus_tests] {
 615     if { [build_inferior "${binfile}-cxx" "c++"] < 0 } {
 616         return -1
 617     }
 618     with_test_prefix "c++" {
 619         test_subscript_regression "${binfile}-cxx" "c++"
 620     }
 621 }