gdb/testsuite/gdb.base/callfuncs.exp

   1 # Copyright 1992-2014 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     setup_xfail "*-*-*" 2416
  30     fail "This target can not call functions"
  31     continue
  32 }
  33
  34 # FIXME:  Before calling this proc, we should probably verify that
  35 # we can call inferior functions and get a valid integral value
  36 # returned.
  37 # Note that it is OK to check for 0 or 1 as the returned values, because C
  38 # specifies that the numeric value of a relational or logical expression
  39 # (computed in the inferior) is 1 for true and 0 for false.
  40
  41 proc do_function_calls {} {
  42     global gdb_prompt
  43
  44     # We need to up this because this can be really slow on some boards.
  45     set timeout 60
  46
  47     # If any of these calls segv we don't want to affect subsequent tests.
  48     # E.g., we want to ensure register values are restored.
  49     gdb_test_no_output "set unwindonsignal on"
  50
  51     gdb_test "p t_char_values(0,0)" " = 0"
  52     gdb_test "p t_char_values('a','b')" " = 1"
  53     gdb_test "p t_char_values(char_val1,char_val2)" " = 1"
  54     gdb_test "p t_char_values('a',char_val2)" " = 1"
  55     gdb_test "p t_char_values(char_val1,'b')" " = 1"
  56
  57     gdb_test "p t_short_values(0,0)" " = 0"
  58     gdb_test "p t_short_values(10,-23)" " = 1"
  59     gdb_test "p t_short_values(short_val1,short_val2)" " = 1"
  60     gdb_test "p t_short_values(10,short_val2)" " = 1"
  61     gdb_test "p t_short_values(short_val1,-23)" " = 1"
  62
  63     gdb_test "p t_int_values(0,0)" " = 0"
  64     gdb_test "p t_int_values(87,-26)" " = 1"
  65     gdb_test "p t_int_values(int_val1,int_val2)" " = 1"
  66     gdb_test "p t_int_values(87,int_val2)" " = 1"
  67     gdb_test "p t_int_values(int_val1,-26)" " = 1"
  68
  69     gdb_test "p t_long_values(0,0)" " = 0"
  70     gdb_test "p t_long_values(789,-321)" " = 1"
  71     gdb_test "p t_long_values(long_val1,long_val2)" " = 1"
  72     gdb_test "p t_long_values(789,long_val2)" " = 1"
  73     gdb_test "p t_long_values(long_val1,-321)" " = 1"
  74
  75     if ![target_info exists gdb,skip_float_tests] {
  76         gdb_test "p t_float_values(0.0,0.0)" " = 0"
  77
  78         # These next four tests fail on the mn10300.
  79         # The first value is passed in regs, the other in memory.
  80         # Gcc emits different stabs for the two parameters; the first is
  81         # claimed to be a float, the second a double.
  82         # dbxout.c in gcc claims this is the desired behavior.
  83         # These tests also fail for RealView, because GDB can not tell that
  84         # the function is unprototyped.
  85         setup_xfail "mn10300-*-*"
  86         if { [test_compiler_info "armcc-*"] } { setup_xfail "*-*-*" }
  87         gdb_test "p t_float_values(3.14159,-2.3765)" " = 1"
  88         setup_xfail "mn10300-*-*"
  89         if { [test_compiler_info "armcc-*"] } { setup_xfail "*-*-*" }
  90         gdb_test "p t_float_values(float_val1,float_val2)" " = 1"
  91         setup_xfail "mn10300-*-*"
  92         if { [test_compiler_info "armcc-*"] } { setup_xfail "*-*-*" }
  93         gdb_test "p t_float_values(3.14159,float_val2)" " = 1"
  94         setup_xfail "mn10300-*-*"
  95         if { [test_compiler_info "armcc-*"] } { setup_xfail "*-*-*" }
  96         gdb_test "p t_float_values(float_val1,-2.3765)" " = 1"
  97
  98         # Test passing of arguments which might not be widened.
  99         gdb_test "p t_float_values2(0.0,0.0)" " = 0"
 100
 101         gdb_test "p t_float_values2(3.14159,float_val2)" " = 1"
 102
 103         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."
 104
 105         gdb_test "p t_small_values(1,2,3,4,5,6,7,8,9,10)" " = 55"
 106
 107         gdb_test "p t_double_values(0.0,0.0)" " = 0"
 108         gdb_test "p t_double_values(45.654,-67.66)" " = 1"
 109         gdb_test "p t_double_values(double_val1,double_val2)" " = 1"
 110         gdb_test "p t_double_values(45.654,double_val2)" " = 1"
 111         gdb_test "p t_double_values(double_val1,-67.66)" " = 1"
 112
 113         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."
 114
 115         gdb_test "p t_double_int(99.0, 1)" " = 0"
 116         gdb_test "p t_double_int(99.0, 99)" " = 1"
 117         gdb_test "p t_int_double(99, 1.0)" " = 0"
 118         gdb_test "p t_int_double(99, 99.0)" " = 1"
 119     }
 120
 121     if [support_complex_tests] {
 122         gdb_test "p t_float_complex_values(fc1, fc2)" " = 1"
 123         gdb_test "p t_float_complex_values(fc3, fc4)" " = 0"
 124
 125         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"
 126         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"
 127
 128         gdb_test "p t_double_complex_values(dc1, dc2)" " = 1"
 129         gdb_test "p t_double_complex_values(dc3, dc4)" " = 0"
 130
 131         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"
 132         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"
 133
 134         gdb_test "p t_long_double_complex_values(ldc1, ldc2)" " = 1"
 135         gdb_test "p t_long_double_complex_values(ldc3, ldc4)" " = 0"
 136         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"
 137         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"
 138     }
 139
 140     gdb_test "p t_string_values(string_val2,string_val1)" " = 0"
 141     gdb_test "p t_string_values(string_val1,string_val2)" " = 1"
 142     gdb_test "p t_string_values(\"string 1\",\"string 2\")" " = 1"
 143     gdb_test "p t_string_values(\"string 1\",string_val2)" " = 1"
 144     gdb_test "p t_string_values(string_val1,\"string 2\")" " = 1"
 145
 146     gdb_test "p t_char_array_values(char_array_val2,char_array_val1)" " = 0"
 147     gdb_test "p t_char_array_values(char_array_val1,char_array_val2)" " = 1"
 148     gdb_test "p t_char_array_values(\"carray 1\",\"carray 2\")" " = 1"
 149     gdb_test "p t_char_array_values(\"carray 1\",char_array_val2)" " = 1"
 150     gdb_test "p t_char_array_values(char_array_val1,\"carray 2\")" " = 1"
 151
 152     gdb_test "p doubleit(4)" " = 8"
 153     gdb_test "p add(4,5)" " = 9"
 154     gdb_test "p t_func_values(func_val2,func_val1)" " = 0"
 155     gdb_test "p t_func_values(func_val1,func_val2)" " = 1"
 156
 157     gdb_test "p function_struct.func(5)" " = 10"
 158     gdb_test "p function_struct_ptr->func(10)" " = 20"
 159
 160     # GDB currently screws up the passing of function parameters for
 161     # ABIs that use function descriptors.  Instead of passing the
 162     # address of te function descriptor, GDB passes the address of the
 163     # function body.  This results in the called function treating the
 164     # first few instructions of the function proper as a descriptor
 165     # and attempting a jump through that (a totally random address).
 166     setup_kfail gdb/1457 "rs6000*-*-aix*"
 167     setup_kfail gdb/1457 "powerpc*-*-aix*"
 168     setup_kfail gdb/1457 hppa*-*-hpux*
 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     setup_kfail gdb/1457 hppa*-*-hpux*
 173     gdb_test "p t_func_values(func_val1,doubleit)" " = 1"
 174     setup_kfail gdb/1457 "rs6000*-*-aix*"
 175     setup_kfail gdb/1457 "powerpc*-*-aix*"
 176     setup_kfail gdb/1457 hppa*-*-hpux*
 177     gdb_test "p t_call_add(add,3,4)" " = 7"
 178     gdb_test "p t_call_add(func_val1,3,4)" " = 7"
 179
 180     gdb_test "p t_enum_value1(enumval1)" " = 1"
 181     gdb_test "p t_enum_value1(enum_val1)" " = 1"
 182     gdb_test "p t_enum_value1(enum_val2)" " = 0"
 183
 184     gdb_test "p t_enum_value2(enumval2)" " = 1"
 185     gdb_test "p t_enum_value2(enum_val2)" " = 1"
 186     gdb_test "p t_enum_value2(enum_val1)" " = 0"
 187
 188     gdb_test "p sum_args(1,{2})" " = 2"
 189     gdb_test "p sum_args(2,{2,3})" " = 5"
 190     gdb_test "p sum_args(3,{2,3,4})" " = 9"
 191     gdb_test "p sum_args(4,{2,3,4,5})" " = 14"
 192
 193     gdb_test "p sum10 (1, 2, 3, 4, 5, 6, 7, 8, 9, 10)" " = 55"
 194
 195     gdb_test "p cmp10 (0, 1, 2, 3, 4, 5, 6, 7, 8, 9)" " = 1"
 196
 197     gdb_test "p t_structs_c(struct_val1)" "= 120 'x'" \
 198         "call inferior func with struct - returns char"
 199     gdb_test "p t_structs_s(struct_val1)" "= 87" \
 200         "call inferior func with struct - returns short"
 201     gdb_test "p t_structs_i(struct_val1)" "= 76" \
 202         "call inferior func with struct - returns int"
 203     gdb_test "p t_structs_l(struct_val1)" "= 51" \
 204         "call inferior func with struct - returns long"
 205
 206     if ![target_info exists gdb,skip_float_tests] {
 207         gdb_test "p t_structs_f(struct_val1)" "= 2.12.*" \
 208             "call inferior func with struct - returns float"
 209         gdb_test "p t_structs_d(struct_val1)" "= 9.87.*" \
 210             "call inferior func with struct - returns double"
 211     }
 212
 213     if [support_complex_tests] {
 214
 215         gdb_test "p t_structs_fc(struct_val1)" ".*= 3 \\+ 3 \\* I" \
 216             "call inferior func with struct - returns float _Complex"
 217
 218         gdb_test "p t_structs_dc(struct_val1)" ".*= 4 \\+ 4 \\* I" \
 219             "call inferior func with struct - returns double _Complex"
 220
 221         gdb_test "p t_structs_ldc(struct_val1)" "= 5 \\+ 5 \\* I" \
 222             "call inferior func with struct - returns long double _Complex"
 223     }
 224
 225     gdb_test "p t_structs_a(struct_val1)" "= (.unsigned char .. )?<buf.*> \"foo\"" \
 226         "call inferior func with struct - returns char *"
 227
 228     # Restore default value.
 229     gdb_test_no_output "set unwindonsignal off"
 230 }
 231
 232 # Procedure to get current content of all registers.
 233 proc fetch_all_registers {test} {
 234     global gdb_prompt
 235
 236     set all_registers_lines {}
 237     set bad -1
 238     # Former trailing `\[\r\n\]+' may eat just \r leaving \n in the buffer
 239     # corrupting the next matches.
 240     if {[gdb_test_multiple "info all-registers" $test {
 241         -re "info all-registers\r\n" {
 242             exp_continue
 243         }
 244         -ex "The program has no registers now" {
 245             set bad 1
 246             exp_continue
 247         }
 248         -re "^bspstore\[ \t\]+\[^\r\n\]+\r\n" {
 249             if [istarget "ia64-*-*"] {
 250                 # Filter out bspstore which is specially tied to bsp,
 251                 # giving spurious differences.
 252             } else {
 253                 lappend all_registers_lines $expect_out(0,string)
 254             }
 255             exp_continue
 256         }
 257         -re "^last_break\[ \t\]+\[^\r\n\]+\r\n" {
 258             if [istarget "s390*-*-*"] {
 259                 # Filter out last_break which is read-only,
 260                 # giving spurious differences.
 261             } else {
 262                 lappend all_registers_lines $expect_out(0,string)
 263             }
 264             exp_continue
 265         }
 266         -re "^\[^ \t\]+\[ \t\]+\[^\r\n\]+\r\n" {
 267             lappend all_registers_lines $expect_out(0,string)
 268             exp_continue
 269         }
 270         -re "$gdb_prompt $" {
 271             incr bad
 272         }
 273         -re "^\[^\r\n\]+\r\n" {
 274             if {!$bad} {
 275                 warning "Unrecognized output: $expect_out(0,string)"
 276                 set bad 1
 277             }
 278             exp_continue
 279         }
 280     }] != 0} {
 281         return {}
 282     }
 283
 284     if {$bad} {
 285         fail $test
 286         return {}
 287     }
 288
 289     pass $test
 290     return $all_registers_lines
 291 }
 292
 293 proc rerun_and_prepare {} {
 294     global hp_aCC_compiler
 295
 296     if { ![runto_main] } {
 297         gdb_suppress_tests
 298     }
 299     if { $hp_aCC_compiler } {
 300         # Do not set language explicitly to 'C'.  This will cause aCC
 301         # tests to fail because promotion rules are different.  Just let
 302         # the language be set to the default.
 303         # However, turn off overload-resolution for aCC.  Having it on causes
 304         # a lot of failures.
 305
 306         gdb_test_no_output "set overload-resolution 0"
 307     } else {
 308         gdb_test_no_output "set language c"
 309     }
 310
 311     get_debug_format
 312
 313     # Make sure that malloc gets called and that the floating point unit
 314     # is initialized via a call to t_double_values.
 315     gdb_test "next" "t_double_values\\(double_val1, double_val2\\);.*" \
 316         "next to t_double_values"
 317     gdb_test "next" "t_structs_c\\(struct_val1\\);.*" \
 318         "next to t_structs_c"
 319 }
 320
 321 proc perform_all_tests {} {
 322     gdb_test_no_output "set print sevenbit-strings"
 323     gdb_test_no_output "set print address off"
 324     gdb_test_no_output "set width 0"
 325
 326     rerun_and_prepare
 327
 328     # Save all register contents.
 329     set old_reg_content [fetch_all_registers "retrieve original register contents"]
 330
 331     # Perform function calls.
 332     do_function_calls
 333
 334     # Check if all registers still have the same value.
 335     set new_reg_content [fetch_all_registers \
 336                              "register contents after gdb function calls"]
 337     if {$old_reg_content == $new_reg_content} then {
 338         pass "gdb function calls preserve register contents"
 339     } else {
 340         set old_reg_content $new_reg_content
 341         fail "gdb function calls preserve register contents"
 342     }
 343
 344     rerun_and_prepare
 345     # Save all register contents.
 346     set old_reg_content [fetch_all_registers "retrieve original register contents"]
 347
 348     # Set breakpoint at a function we will call from gdb.
 349     gdb_breakpoint add
 350
 351     # Call function (causing a breakpoint hit in the call dummy) and do a continue,
 352     # make sure we are back at main and still have the same register contents.
 353     gdb_test "print add(4,5)" \
 354         "The program being debugged stopped while.*" \
 355         "stop at breakpoint in call dummy function"
 356     gdb_test "continue" "Continuing.*" "continue from call dummy breakpoint"
 357     if ![gdb_test "bt 2" \
 358              "#0  main.*" \
 359              "bt after continuing from call dummy breakpoint"] then {
 360                  set new_reg_content [fetch_all_registers \
 361                                           "register contents after stop in call dummy"]
 362                  if {$old_reg_content == $new_reg_content} then {
 363                      pass "continue after stop in call dummy preserves register contents"
 364                  } else {
 365                      fail "continue after stop in call dummy preserves register contents"
 366                  }
 367              }
 368
 369     rerun_and_prepare
 370     # Set breakpoint at a function we will call from gdb.
 371     gdb_breakpoint add
 372     # Save all register contents.
 373     set old_reg_content [fetch_all_registers "retrieve original register contents"]
 374
 375     # Call function (causing a breakpoint hit in the call dummy) and do a finish,
 376     # make sure we are back at main and still have the same register contents.
 377     gdb_test "print add(4,5)" "The program being debugged stopped while.*" \
 378         "call function causing a breakpoint then do a finish"
 379     gdb_test "finish" \
 380         "Value returned is .* = 9" \
 381         "finish from call dummy breakpoint returns correct value"
 382     if ![gdb_test "bt 2" \
 383              "#0  main.*" \
 384              "bt after finishing from call dummy breakpoint"] then {
 385                  set new_reg_content [fetch_all_registers \
 386                                           "register contents after finish in call dummy"]
 387                  if {$old_reg_content == $new_reg_content} then {
 388                      pass "finish after stop in call dummy preserves register contents"
 389                  } else {
 390                      fail "finish after stop in call dummy preserves register contents"
 391                  }
 392              }
 393
 394     rerun_and_prepare
 395     # Set breakpoint at a function we will call from gdb.
 396     gdb_breakpoint add
 397     # Save all register contents.
 398     set old_reg_content [fetch_all_registers "retrieve original register contents"]
 399
 400     # Call function (causing a breakpoint hit in the call dummy) and do a return
 401     # with a value, make sure we are back at main with the same register contents.
 402     gdb_test "print add(4,5)" "The program being debugged stopped while.*" \
 403         "call function causing a breakpoint and then do a return"
 404     if ![gdb_test "return 7" \
 405              "#0  main.*" \
 406              "back at main after return from call dummy breakpoint" \
 407              "Make add return now. .y or n.*" \
 408              "y"] then {
 409                  set new_reg_content [fetch_all_registers \
 410                                           "register contents after return in call dummy"]
 411                  if {$old_reg_content == $new_reg_content} then {
 412                      pass "return after stop in call dummy preserves register contents"
 413                  } else {
 414                      fail "return after stop in call dummy preserves register contents"
 415                  }
 416              }
 417
 418     rerun_and_prepare
 419     # Set breakpoint at a function we will call from gdb.
 420     gdb_breakpoint add
 421     set old_reg_content [fetch_all_registers "retrieve original register contents"]
 422
 423     # Call function (causing a breakpoint hit in the call dummy), and
 424     # call another function from the call dummy frame (thereby setting up
 425     # several nested call dummy frames).  Test that backtrace and finish
 426     # work when several call dummies are nested.
 427     gdb_breakpoint sum10
 428     gdb_breakpoint t_small_values
 429     gdb_test "print add(2,3)" "The program being debugged stopped while.*" \
 430         "stop at nested call level 1"
 431     gdb_test "backtrace" \
 432         "\#0  add \\(a=2, b=3\\).*\#1  <function called from gdb>.*\#2  main.*" \
 433         "backtrace at nested call level 1"
 434     gdb_test "print add(4,5)" "The program being debugged stopped while.*" \
 435         "stop at nested call level 2"
 436     gdb_test "backtrace" \
 437         "\#0  add \\(a=4, b=5\\).*\#1  <function called from gdb>.*\#2  add \\(a=2, b=3\\).*\#3  <function called from gdb>.*\#4  main.*" \
 438         "backtrace at nested call level 2"
 439     gdb_test "print sum10(2,4,6,8,10,12,14,16,18,20)" \
 440         "The program being debugged stopped while.*" \
 441         "stop at nested call level 3"
 442     gdb_test "backtrace" \
 443         "\#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.*" \
 444         "backtrace at nested call level 3"
 445     gdb_test "print t_small_values(1,3,5,7,9,11,13,15,17,19)" \
 446         "The program being debugged stopped while.*" \
 447         "stop at nested call level 4"
 448     gdb_test "backtrace" \
 449         "\#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.*" \
 450         "backtrace at nested call level 4"
 451     gdb_test "finish" "Value returned is .* = 100" \
 452         "Finish from nested call level 4"
 453     gdb_test "backtrace" \
 454         "\#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.*" \
 455         "backtrace after finish from nested call level 4"
 456     gdb_test "finish" "Value returned is .* = 110" \
 457         "Finish from nested call level 3"
 458     gdb_test "backtrace" \
 459         "\#0  add \\(a=4, b=5\\).*\#1  <function called from gdb>.*\#2  add \\(a=2, b=3\\).*\#3  <function called from gdb>.*\#4  main.*" \
 460         "backtrace after finish from nested call level 3"
 461     gdb_test "finish" "Value returned is .* = 9" \
 462         "Finish from nested call level 2"
 463     gdb_test "backtrace" \
 464         "\#0  add \\(a=2, b=3\\).*\#1  <function called from gdb>.*\#2  main.*" \
 465         "backtrace after finish from nested call level 2"
 466     gdb_test "finish" "Value returned is .* = 5" \
 467         "Finish from nested call level 1"
 468     gdb_test "backtrace" "\#0  main .*" \
 469         "backtrace after finish from nested call level 1"
 470
 471     set new_reg_content [fetch_all_registers \
 472                              "register contents after nested call dummies"]
 473     if {$old_reg_content == $new_reg_content} then {
 474         pass "nested call dummies preserve register contents"
 475     } else {
 476         fail "nested call dummies preserve register contents"
 477     }
 478
 479     # GDB should not crash by internal error on $sp underflow during the inferior
 480     # call.  It is OK it will stop on some: Cannot access memory at address 0x$hex.
 481
 482     if {![target_info exists gdb,nosignals] && ![istarget "*-*-uclinux*"]} {
 483         gdb_test {set $old_sp = $sp}
 484
 485         gdb_test {set $sp = 0}
 486         gdb_test "call doubleit (1)" ".*" "sp == 0: call doubleit (1)"
 487
 488         gdb_test {set $sp = -1}
 489         gdb_test "call doubleit (1)" ".*" "sp == -1: call doubleit (1)"
 490
 491         gdb_test {set $sp = $old_sp}
 492     }
 493
 494     # Test function descriptor resolution - the separate debug info .opd section
 495     # handling vs. local labels `.L'... as `Lcallfunc' starts with `L'.
 496
 497     gdb_test "print callfunc (Lcallfunc, 5)" " = 12"
 498
 499     # Regression test for function pointer cast.
 500     gdb_test "print *((int *(*) (void)) voidfunc)()" " = 23"
 501 }
 502
 503 # Perform all tests with and without function prototypes.
 504
 505 if { ![prepare_for_testing ${testfile}.exp $testfile $srcfile "$compile_flags additional_flags=-DPROTOTYPES"] } {
 506     perform_all_tests
 507 }
 508
 509 if { ![prepare_for_testing ${testfile}.exp $testfile $srcfile "$compile_flags additional_flags=-DNO_PROTOTYPES"] } {
 510     with_test_prefix "noproto" perform_all_tests
 511 }