gdb/testsuite/gdb.base/callfuncs.exp

   1 # Copyright 1992-2016 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 was written by Fred Fish. (fnf@cygnus.com)
  17 # and modified by Bob Manson. (manson@cygnus.com)
  18
  19 standard_testfile
  20
  21 set compile_flags {debug}
  22 if [support_complex_tests] {
  23     lappend compile_flags "additional_flags=-DTEST_COMPLEX"
  24 }
  25
  26 # Some targets can't do function calls, so don't even bother with this
  27 # test.
  28 if [target_info exists gdb,cannot_call_functions] {
  29     unsupported "this target can not call functions"
  30     continue
  31 }
  32
  33 set skip_float_test [gdb_skip_float_test]
  34
  35 # FIXME:  Before calling this proc, we should probably verify that
  36 # we can call inferior functions and get a valid integral value
  37 # returned.
  38 # Note that it is OK to check for 0 or 1 as the returned values, because C
  39 # specifies that the numeric value of a relational or logical expression
  40 # (computed in the inferior) is 1 for true and 0 for false.
  41
  42 proc do_function_calls {} {
  43     global gdb_prompt skip_float_test
  44
  45     # We need to up this because this can be really slow on some boards.
  46     set timeout 60
  47
  48     # If any of these calls segv we don't want to affect subsequent tests.
  49     # E.g., we want to ensure register values are restored.
  50     gdb_test_no_output "set unwindonsignal on"
  51
  52     gdb_test "p t_char_values(0,0)" " = 0"
  53     gdb_test "p t_char_values('a','b')" " = 1"
  54     gdb_test "p t_char_values(char_val1,char_val2)" " = 1"
  55     gdb_test "p t_char_values('a',char_val2)" " = 1"
  56     gdb_test "p t_char_values(char_val1,'b')" " = 1"
  57
  58     gdb_test "p t_short_values(0,0)" " = 0"
  59     gdb_test "p t_short_values(10,-23)" " = 1"
  60     gdb_test "p t_short_values(short_val1,short_val2)" " = 1"
  61     gdb_test "p t_short_values(10,short_val2)" " = 1"
  62     gdb_test "p t_short_values(short_val1,-23)" " = 1"
  63
  64     gdb_test "p t_int_values(0,0)" " = 0"
  65     gdb_test "p t_int_values(87,-26)" " = 1"
  66     gdb_test "p t_int_values(int_val1,int_val2)" " = 1"
  67     gdb_test "p t_int_values(87,int_val2)" " = 1"
  68     gdb_test "p t_int_values(int_val1,-26)" " = 1"
  69
  70     gdb_test "p t_long_values(0,0)" " = 0"
  71     gdb_test "p t_long_values(789,-321)" " = 1"
  72     gdb_test "p t_long_values(long_val1,long_val2)" " = 1"
  73     gdb_test "p t_long_values(789,long_val2)" " = 1"
  74     gdb_test "p t_long_values(long_val1,-321)" " = 1"
  75
  76     if {!$skip_float_test} {
  77         gdb_test "p t_float_values(0.0,0.0)" " = 0"
  78
  79         # These next four tests fail on the mn10300.
  80         # The first value is passed in regs, the other in memory.
  81         # Gcc emits different stabs for the two parameters; the first is
  82         # claimed to be a float, the second a double.
  83         # dbxout.c in gcc claims this is the desired behavior.
  84         # These tests also fail for RealView, because GDB can not tell that
  85         # the function is unprototyped.
  86         setup_xfail "mn10300-*-*"
  87         if { [test_compiler_info "armcc-*"] } { setup_xfail "*-*-*" }
  88         gdb_test "p t_float_values(3.14159,-2.3765)" " = 1"
  89         setup_xfail "mn10300-*-*"
  90         if { [test_compiler_info "armcc-*"] } { setup_xfail "*-*-*" }
  91         gdb_test "p t_float_values(float_val1,float_val2)" " = 1"
  92         setup_xfail "mn10300-*-*"
  93         if { [test_compiler_info "armcc-*"] } { setup_xfail "*-*-*" }
  94         gdb_test "p t_float_values(3.14159,float_val2)" " = 1"
  95         setup_xfail "mn10300-*-*"
  96         if { [test_compiler_info "armcc-*"] } { setup_xfail "*-*-*" }
  97         gdb_test "p t_float_values(float_val1,-2.3765)" " = 1"
  98
  99         # Test passing of arguments which might not be widened.
 100         gdb_test "p t_float_values2(0.0,0.0)" " = 0"
 101
 102         gdb_test "p t_float_values2(3.14159,float_val2)" " = 1"
 103
 104         gdb_test "p t_float_many_args (float_val1, float_val2, float_val3, float_val4, float_val5, float_val6, float_val7, float_val8, float_val9, float_val10, float_val11, float_val12, float_val13, float_val14, float_val15)" " = 1" "call function with many float arguments."
 105
 106         gdb_test "p t_small_values(1,2,3,4,5,6,7,8,9,10)" " = 55"
 107
 108         gdb_test "p t_double_values(0.0,0.0)" " = 0"
 109         gdb_test "p t_double_values(45.654,-67.66)" " = 1"
 110         gdb_test "p t_double_values(double_val1,double_val2)" " = 1"
 111         gdb_test "p t_double_values(45.654,double_val2)" " = 1"
 112         gdb_test "p t_double_values(double_val1,-67.66)" " = 1"
 113
 114         gdb_test "p t_double_many_args (double_val1, double_val2, double_val3, double_val4, double_val5, double_val6, double_val7, double_val8, double_val9, double_val10, double_val11, double_val12, double_val13, double_val14, double_val15)" " = 1" "call function with many double arguments."
 115
 116         gdb_test "p t_double_int(99.0, 1)" " = 0"
 117         gdb_test "p t_double_int(99.0, 99)" " = 1"
 118         gdb_test "p t_int_double(99, 1.0)" " = 0"
 119         gdb_test "p t_int_double(99, 99.0)" " = 1"
 120     }
 121
 122     if [support_complex_tests] {
 123         gdb_test "p t_float_complex_values(fc1, fc2)" " = 1"
 124         gdb_test "p t_float_complex_values(fc3, fc4)" " = 0"
 125
 126         gdb_test "p t_float_complex_many_args(fc1, fc2, fc3, fc4, fc1, fc2, fc3, fc4, fc1, fc2, fc3, fc4, fc1, fc2, fc3, fc4)" " = 1"
 127         gdb_test "p t_float_complex_many_args(fc1, fc1, fc1, fc1, fc1, fc1, fc1, fc1, fc1, fc1, fc1, fc1, fc1, fc1, fc1, fc1)" " = 0"
 128
 129         gdb_test "p t_double_complex_values(dc1, dc2)" " = 1"
 130         gdb_test "p t_double_complex_values(dc3, dc4)" " = 0"
 131
 132         gdb_test "p t_double_complex_many_args(dc1, dc2, dc3, dc4, dc1, dc2, dc3, dc4, dc1, dc2, dc3, dc4, dc1, dc2, dc3, dc4)" " = 1"
 133         gdb_test "p t_double_complex_many_args(dc1, dc1, dc1, dc1, dc1, dc1, dc1, dc1, dc1, dc1, dc1, dc1, dc1, dc1, dc1, dc1)" " = 0"
 134
 135         gdb_test "p t_long_double_complex_values(ldc1, ldc2)" " = 1"
 136         gdb_test "p t_long_double_complex_values(ldc3, ldc4)" " = 0"
 137         gdb_test "p t_long_double_complex_many_args(ldc1, ldc2, ldc3, ldc4, ldc1, ldc2, ldc3, ldc4, ldc1, ldc2, ldc3, ldc4, ldc1, ldc2, ldc3, ldc4)" " = 1"
 138         gdb_test "p t_long_double_complex_many_args(ldc1, ldc1, ldc1, ldc1, ldc1, ldc1, ldc1,ldc1, ldc1, ldc1, ldc1, ldc1, ldc1, ldc1, ldc1, ldc1)" " = 0"
 139     }
 140
 141     gdb_test "p t_string_values(string_val2,string_val1)" " = 0"
 142     gdb_test "p t_string_values(string_val1,string_val2)" " = 1"
 143     gdb_test "p t_string_values(\"string 1\",\"string 2\")" " = 1"
 144     gdb_test "p t_string_values(\"string 1\",string_val2)" " = 1"
 145     gdb_test "p t_string_values(string_val1,\"string 2\")" " = 1"
 146
 147     gdb_test "p t_char_array_values(char_array_val2,char_array_val1)" " = 0"
 148     gdb_test "p t_char_array_values(char_array_val1,char_array_val2)" " = 1"
 149     gdb_test "p t_char_array_values(\"carray 1\",\"carray 2\")" " = 1"
 150     gdb_test "p t_char_array_values(\"carray 1\",char_array_val2)" " = 1"
 151     gdb_test "p t_char_array_values(char_array_val1,\"carray 2\")" " = 1"
 152
 153     gdb_test "p doubleit(4)" " = 8"
 154     gdb_test "p add(4,5)" " = 9"
 155     gdb_test "p t_func_values(func_val2,func_val1)" " = 0"
 156     gdb_test "p t_func_values(func_val1,func_val2)" " = 1"
 157
 158     gdb_test "p function_struct.func(5)" " = 10"
 159     gdb_test "p function_struct_ptr->func(10)" " = 20"
 160
 161     # GDB currently screws up the passing of function parameters for
 162     # ABIs that use function descriptors.  Instead of passing the
 163     # address of te function descriptor, GDB passes the address of the
 164     # function body.  This results in the called function treating the
 165     # first few instructions of the function proper as a descriptor
 166     # and attempting a jump through that (a totally random address).
 167     setup_kfail gdb/1457 "rs6000*-*-aix*"
 168     setup_kfail gdb/1457 "powerpc*-*-aix*"
 169     gdb_test "p t_func_values(add,func_val2)" " = 1"
 170     setup_kfail gdb/1457 "rs6000*-*-aix*"
 171     setup_kfail gdb/1457 "powerpc*-*-aix*"
 172     gdb_test "p t_func_values(func_val1,doubleit)" " = 1"
 173     setup_kfail gdb/1457 "rs6000*-*-aix*"
 174     setup_kfail gdb/1457 "powerpc*-*-aix*"
 175     gdb_test "p t_call_add(add,3,4)" " = 7"
 176     gdb_test "p t_call_add(func_val1,3,4)" " = 7"
 177
 178     gdb_test "p t_enum_value1(enumval1)" " = 1"
 179     gdb_test "p t_enum_value1(enum_val1)" " = 1"
 180     gdb_test "p t_enum_value1(enum_val2)" " = 0"
 181
 182     gdb_test "p t_enum_value2(enumval2)" " = 1"
 183     gdb_test "p t_enum_value2(enum_val2)" " = 1"
 184     gdb_test "p t_enum_value2(enum_val1)" " = 0"
 185
 186     gdb_test "p sum_args(1,{2})" " = 2"
 187     gdb_test "p sum_args(2,{2,3})" " = 5"
 188     gdb_test "p sum_args(3,{2,3,4})" " = 9"
 189     gdb_test "p sum_args(4,{2,3,4,5})" " = 14"
 190
 191     gdb_test "p sum10 (1, 2, 3, 4, 5, 6, 7, 8, 9, 10)" " = 55"
 192
 193     gdb_test "p cmp10 (0, 1, 2, 3, 4, 5, 6, 7, 8, 9)" " = 1"
 194
 195     gdb_test "p t_structs_c(struct_val1)" "= 120 'x'" \
 196         "call inferior func with struct - returns char"
 197     gdb_test "p t_structs_s(struct_val1)" "= 87" \
 198         "call inferior func with struct - returns short"
 199     gdb_test "p t_structs_i(struct_val1)" "= 76" \
 200         "call inferior func with struct - returns int"
 201     gdb_test "p t_structs_l(struct_val1)" "= 51" \
 202         "call inferior func with struct - returns long"
 203
 204     if {!$skip_float_test} {
 205         gdb_test "p t_structs_f(struct_val1)" "= 2.12.*" \
 206             "call inferior func with struct - returns float"
 207         gdb_test "p t_structs_d(struct_val1)" "= 9.87.*" \
 208             "call inferior func with struct - returns double"
 209     }
 210
 211     if [support_complex_tests] {
 212
 213         gdb_test "p t_structs_fc(struct_val1)" ".*= 3 \\+ 3 \\* I" \
 214             "call inferior func with struct - returns float _Complex"
 215
 216         gdb_test "p t_structs_dc(struct_val1)" ".*= 4 \\+ 4 \\* I" \
 217             "call inferior func with struct - returns double _Complex"
 218
 219         gdb_test "p t_structs_ldc(struct_val1)" "= 5 \\+ 5 \\* I" \
 220             "call inferior func with struct - returns long double _Complex"
 221     }
 222
 223     gdb_test "p t_structs_a(struct_val1)" "= (.unsigned char .. )?<.*buf.*> \"foo\"" \
 224         "call inferior func with struct - returns char *"
 225
 226     # Restore default value.
 227     gdb_test_no_output "set unwindonsignal off"
 228 }
 229
 230 # Procedure to get current content of all registers.
 231 proc fetch_all_registers {test} {
 232     global gdb_prompt
 233
 234     set all_registers_lines {}
 235     set bad -1
 236     # Former trailing `\[\r\n\]+' may eat just \r leaving \n in the buffer
 237     # corrupting the next matches.
 238     if {[gdb_test_multiple "info all-registers" $test {
 239         -re "info all-registers\r\n" {
 240             exp_continue
 241         }
 242         -ex "The program has no registers now" {
 243             set bad 1
 244             exp_continue
 245         }
 246         -re "^bspstore\[ \t\]+\[^\r\n\]+\r\n" {
 247             if [istarget "ia64-*-*"] {
 248                 # Filter out bspstore which is specially tied to bsp,
 249                 # giving spurious differences.
 250             } else {
 251                 lappend all_registers_lines $expect_out(0,string)
 252             }
 253             exp_continue
 254         }
 255         -re  "^pstate\[ \t\]+\[^\r\n\]+\r\n" {
 256             if [istarget "sparc64-*-linux-gnu"] {
 257                 # Filter out the pstate register, since in sparc64
 258                 # targets the Linux kernel disables pstate.PEF when
 259                 # returning from traps, giving spurious differences.
 260             } else {
 261                 lappend all_registers_lines $expect_out(0,string)
 262             }
 263             exp_continue
 264         }
 265         -re "^last_break\[ \t\]+\[^\r\n\]+\r\n" {
 266             if [istarget "s390*-*-*"] {
 267                 # Filter out last_break which is read-only,
 268                 # giving spurious differences.
 269             } else {
 270                 lappend all_registers_lines $expect_out(0,string)
 271             }
 272             exp_continue
 273         }
 274         -re "^\[^ \t\]+\[ \t\]+\[^\r\n\]+\r\n" {
 275             lappend all_registers_lines $expect_out(0,string)
 276             exp_continue
 277         }
 278         -re "$gdb_prompt $" {
 279             incr bad
 280         }
 281         -re "^\[^\r\n\]+\r\n" {
 282             if {!$bad} {
 283                 warning "Unrecognized output: $expect_out(0,string)"
 284                 set bad 1
 285             }
 286             exp_continue
 287         }
 288     }] != 0} {
 289         return {}
 290     }
 291
 292     if {$bad} {
 293         fail $test
 294         return {}
 295     }
 296
 297     pass $test
 298     return $all_registers_lines
 299 }
 300
 301 proc rerun_and_prepare {} {
 302     if { ![runto_main] } {
 303         gdb_suppress_tests
 304     }
 305
 306     gdb_test_no_output "set language c"
 307
 308     get_debug_format
 309
 310     # Make sure that malloc gets called and that the floating point unit
 311     # is initialized via a call to t_double_values.
 312     gdb_test "next" "t_double_values\\(double_val1, double_val2\\);.*" \
 313         "next to t_double_values"
 314     gdb_test "next" "t_structs_c\\(struct_val1\\);.*" \
 315         "next to t_structs_c"
 316 }
 317
 318 proc perform_all_tests {} {
 319     gdb_test_no_output "set print sevenbit-strings"
 320     gdb_test_no_output "set print address off"
 321     gdb_test_no_output "set width 0"
 322
 323     rerun_and_prepare
 324
 325     # Save all register contents.
 326     set old_reg_content [fetch_all_registers "retrieve original register contents"]
 327
 328     # Perform function calls.
 329     do_function_calls
 330
 331     # Check if all registers still have the same value.
 332     set new_reg_content [fetch_all_registers \
 333                              "register contents after gdb function calls"]
 334     if {$old_reg_content == $new_reg_content} then {
 335         pass "gdb function calls preserve register contents"
 336     } else {
 337         set old_reg_content $new_reg_content
 338         fail "gdb function calls preserve register contents"
 339     }
 340
 341     rerun_and_prepare
 342     # Save all register contents.
 343     set old_reg_content [fetch_all_registers "retrieve original register contents"]
 344
 345     # Set breakpoint at a function we will call from gdb.
 346     gdb_breakpoint add
 347
 348     # Call function (causing a breakpoint hit in the call dummy) and do a continue,
 349     # make sure we are back at main and still have the same register contents.
 350     gdb_test "print add(4,5)" \
 351         "The program being debugged stopped while.*" \
 352         "stop at breakpoint in call dummy function"
 353     gdb_test "continue" "Continuing.*" "continue from call dummy breakpoint"
 354     if ![gdb_test "bt 2" \
 355              "#0  main.*" \
 356              "bt after continuing from call dummy breakpoint"] then {
 357                  set new_reg_content [fetch_all_registers \
 358                                           "register contents after stop in call dummy"]
 359                  if {$old_reg_content == $new_reg_content} then {
 360                      pass "continue after stop in call dummy preserves register contents"
 361                  } else {
 362                      fail "continue after stop in call dummy preserves register contents"
 363                  }
 364              }
 365
 366     rerun_and_prepare
 367     # Set breakpoint at a function we will call from gdb.
 368     gdb_breakpoint add
 369     # Save all register contents.
 370     set old_reg_content [fetch_all_registers "retrieve original register contents"]
 371
 372     # Call function (causing a breakpoint hit in the call dummy) and do a finish,
 373     # make sure we are back at main and still have the same register contents.
 374     gdb_test "print add(4,5)" "The program being debugged stopped while.*" \
 375         "call function causing a breakpoint then do a finish"
 376     gdb_test "finish" \
 377         "Value returned is .* = 9" \
 378         "finish from call dummy breakpoint returns correct value"
 379     if ![gdb_test "bt 2" \
 380              "#0  main.*" \
 381              "bt after finishing from call dummy breakpoint"] then {
 382                  set new_reg_content [fetch_all_registers \
 383                                           "register contents after finish in call dummy"]
 384                  if {$old_reg_content == $new_reg_content} then {
 385                      pass "finish after stop in call dummy preserves register contents"
 386                  } else {
 387                      fail "finish after stop in call dummy preserves register contents"
 388                  }
 389              }
 390
 391     rerun_and_prepare
 392     # Set breakpoint at a function we will call from gdb.
 393     gdb_breakpoint add
 394     # Save all register contents.
 395     set old_reg_content [fetch_all_registers "retrieve original register contents"]
 396
 397     # Call function (causing a breakpoint hit in the call dummy) and do a return
 398     # with a value, make sure we are back at main with the same register contents.
 399     gdb_test "print add(4,5)" "The program being debugged stopped while.*" \
 400         "call function causing a breakpoint and then do a return"
 401     if ![gdb_test "return 7" \
 402              "#0  main.*" \
 403              "back at main after return from call dummy breakpoint" \
 404              "Make add return now. .y or n.*" \
 405              "y"] then {
 406                  set new_reg_content [fetch_all_registers \
 407                                           "register contents after return in call dummy"]
 408                  if {$old_reg_content == $new_reg_content} then {
 409                      pass "return after stop in call dummy preserves register contents"
 410                  } else {
 411                      fail "return after stop in call dummy preserves register contents"
 412                  }
 413              }
 414
 415     rerun_and_prepare
 416     # Set breakpoint at a function we will call from gdb.
 417     gdb_breakpoint add
 418     set old_reg_content [fetch_all_registers "retrieve original register contents"]
 419
 420     # Call function (causing a breakpoint hit in the call dummy), and
 421     # call another function from the call dummy frame (thereby setting up
 422     # several nested call dummy frames).  Test that backtrace and finish
 423     # work when several call dummies are nested.
 424     gdb_breakpoint sum10
 425     gdb_breakpoint t_small_values
 426     gdb_test "print add(2,3)" "The program being debugged stopped while.*" \
 427         "stop at nested call level 1"
 428     gdb_test "backtrace" \
 429         "\#0  add \\(a=2, b=3\\).*\#1  <function called from gdb>.*\#2  main.*" \
 430         "backtrace at nested call level 1"
 431     gdb_test "print add(4,5)" "The program being debugged stopped while.*" \
 432         "stop at nested call level 2"
 433     gdb_test "backtrace" \
 434         "\#0  add \\(a=4, b=5\\).*\#1  <function called from gdb>.*\#2  add \\(a=2, b=3\\).*\#3  <function called from gdb>.*\#4  main.*" \
 435         "backtrace at nested call level 2"
 436     gdb_test "print sum10(2,4,6,8,10,12,14,16,18,20)" \
 437         "The program being debugged stopped while.*" \
 438         "stop at nested call level 3"
 439     gdb_test "backtrace" \
 440         "\#0  sum10 \\(i0=2, i1=4, i2=6, i3=8, i4=10, i5=12, i6=14, i7=16, i8=18, i9=20\\).*\#1  <function called from gdb>.*\#2  add \\(a=4, b=5\\).*\#3  <function called from gdb>.*\#4  add \\(a=2, b=3\\).*\#5  <function called from gdb>.*\#6  main.*" \
 441         "backtrace at nested call level 3"
 442     gdb_test "print t_small_values(1,3,5,7,9,11,13,15,17,19)" \
 443         "The program being debugged stopped while.*" \
 444         "stop at nested call level 4"
 445     gdb_test "backtrace" \
 446         "\#0  t_small_values \\(arg1=1 '.001', arg2=3, arg3=5, arg4=7 '.a', arg5=9, arg6=11 '.v', arg7=13, arg8=15, arg9=17, arg10=19\\).*\#2  sum10 \\(i0=2, i1=4, i2=6, i3=8, i4=10, i5=12, i6=14, i7=16, i8=18, i9=20\\).*\#3  <function called from gdb>.*\#4  add \\(a=4, b=5\\).*\#5  <function called from gdb>.*\#6  add \\(a=2, b=3\\).*\#7  <function called from gdb>.*\#8  main.*" \
 447         "backtrace at nested call level 4"
 448     gdb_test "finish" "Value returned is .* = 100" \
 449         "Finish from nested call level 4"
 450     gdb_test "backtrace" \
 451         "\#0  sum10 \\(i0=2, i1=4, i2=6, i3=8, i4=10, i5=12, i6=14, i7=16, i8=18, i9=20\\).*\#1  <function called from gdb>.*\#2  add \\(a=4, b=5\\).*\#3  <function called from gdb>.*\#4  add \\(a=2, b=3\\).*\#5  <function called from gdb>.*\#6  main.*" \
 452         "backtrace after finish from nested call level 4"
 453     gdb_test "finish" "Value returned is .* = 110" \
 454         "Finish from nested call level 3"
 455     gdb_test "backtrace" \
 456         "\#0  add \\(a=4, b=5\\).*\#1  <function called from gdb>.*\#2  add \\(a=2, b=3\\).*\#3  <function called from gdb>.*\#4  main.*" \
 457         "backtrace after finish from nested call level 3"
 458     gdb_test "finish" "Value returned is .* = 9" \
 459         "Finish from nested call level 2"
 460     gdb_test "backtrace" \
 461         "\#0  add \\(a=2, b=3\\).*\#1  <function called from gdb>.*\#2  main.*" \
 462         "backtrace after finish from nested call level 2"
 463     gdb_test "finish" "Value returned is .* = 5" \
 464         "Finish from nested call level 1"
 465     gdb_test "backtrace" "\#0  main .*" \
 466         "backtrace after finish from nested call level 1"
 467
 468     set new_reg_content [fetch_all_registers \
 469                              "register contents after nested call dummies"]
 470     if {$old_reg_content == $new_reg_content} then {
 471         pass "nested call dummies preserve register contents"
 472     } else {
 473         fail "nested call dummies preserve register contents"
 474     }
 475
 476     # GDB should not crash by internal error on $sp underflow during the inferior
 477     # call.  It is OK it will stop on some: Cannot access memory at address 0x$hex.
 478
 479     if {![target_info exists gdb,nosignals] && ![istarget "*-*-uclinux*"]} {
 480         gdb_test {set $old_sp = $sp}
 481
 482         gdb_test {set $sp = 0}
 483         gdb_test "call doubleit (1)" ".*" "sp == 0: call doubleit (1)"
 484
 485         gdb_test {set $sp = -1}
 486         gdb_test "call doubleit (1)" ".*" "sp == -1: call doubleit (1)"
 487
 488         gdb_test {set $sp = $old_sp}
 489     }
 490
 491     # Test function descriptor resolution - the separate debug info .opd section
 492     # handling vs. local labels `.L'... as `Lcallfunc' starts with `L'.
 493
 494     gdb_test "print callfunc (Lcallfunc, 5)" " = 12"
 495
 496     # Regression test for function pointer cast.
 497     gdb_test "print *((int *(*) (void)) voidfunc)()" " = 23"
 498 }
 499
 500 # Perform all tests with and without function prototypes.
 501
 502 if { ![prepare_for_testing "failed to prepare" $testfile $srcfile "$compile_flags additional_flags=-DPROTOTYPES"] } {
 503     perform_all_tests
 504 }
 505
 506 if { ![prepare_for_testing "failed to prepare" $testfile $srcfile "$compile_flags additional_flags=-DNO_PROTOTYPES"] } {
 507     with_test_prefix "noproto" perform_all_tests
 508 }