gdb/testsuite/gdb.base/callfuncs.exp

   1 # Copyright 1992-2023 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 # We still want to test non-prototype functions for now, which is why
  22 # we disable compilers warning about them.
  23 set compile_flags {debug additional_flags=-Wno-deprecated-non-prototype}
  24 if [support_complex_tests] {
  25     lappend compile_flags "additional_flags=-DTEST_COMPLEX"
  26 }
  27
  28 # Some targets can't do function calls, so don't even bother with this
  29 # test.
  30 require {!target_info exists gdb,cannot_call_functions}
  31
  32 set allow_float_test [allow_float_test]
  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 {prototypes} {
  42     global gdb_prompt allow_float_test
  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 {$allow_float_test} {
  76         gdb_test "p t_float_values(0.0,0.0)" " = 0"
  77
  78         # These next four tests fail on the mn10300.
  79         # The first value is passed in regs, the other in memory.
  80         # Gcc emits different stabs for the two parameters; the first is
  81         # claimed to be a float, the second a double.
  82         # dbxout.c in gcc claims this is the desired behavior.
  83         # These tests also fail for RealView, because GDB can not tell that
  84         # the function is unprototyped.
  85         setup_xfail "mn10300-*-*"
  86         if { [test_compiler_info "armcc-*"] } { setup_xfail "*-*-*" }
  87         gdb_test "p t_float_values(3.14159,-2.3765)" " = 1"
  88         setup_xfail "mn10300-*-*"
  89         if { [test_compiler_info "armcc-*"] } { setup_xfail "*-*-*" }
  90         gdb_test "p t_float_values(float_val1,float_val2)" " = 1"
  91         setup_xfail "mn10300-*-*"
  92         if { [test_compiler_info "armcc-*"] } { setup_xfail "*-*-*" }
  93         gdb_test "p t_float_values(3.14159,float_val2)" " = 1"
  94         setup_xfail "mn10300-*-*"
  95         if { [test_compiler_info "armcc-*"] } { setup_xfail "*-*-*" }
  96         gdb_test "p t_float_values(float_val1,-2.3765)" " = 1"
  97         # Same, via unprototyped function pointer (t_float_values is
  98         # always unprototyped).
  99         gdb_test "p ((int (*) ()) t_float_values)(float_val1,-2.3765)" " = 1"
 100
 101         # Test passing of arguments which might not be widened.
 102         gdb_test "p t_float_values2(0.0,0.0)" " = 0"
 103         # Same, via function pointer.
 104         if {$prototypes} {
 105             gdb_test "p ((int (*) (float, float)) t_float_values2)(0.0,0.0)" " = 0"
 106         } else {
 107             gdb_test "p ((int (*) ()) t_float_values2)(0.0,0.0)" " = 0"
 108         }
 109
 110         gdb_test "p t_float_values2(3.14159,float_val2)" " = 1"
 111         if {$prototypes} {
 112             gdb_test "p ((int (*) (float, float)) t_float_values2)(3.14159,float_val2)" " = 1"
 113         } else {
 114             gdb_test "p ((int (*) ()) t_float_values2)(3.14159,float_val2)" " = 1"
 115         }
 116
 117         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."
 118
 119         gdb_test "p t_small_values(1,2,3,4,5,6,7,8,9,10)" " = 55"
 120
 121         gdb_test "p t_double_values(0.0,0.0)" " = 0"
 122         gdb_test "p t_double_values(45.654,-67.66)" " = 1"
 123         gdb_test "p t_double_values(double_val1,double_val2)" " = 1"
 124         gdb_test "p t_double_values(45.654,double_val2)" " = 1"
 125         gdb_test "p t_double_values(double_val1,-67.66)" " = 1"
 126
 127         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."
 128
 129         gdb_test "p t_double_int(99.0, 1)" " = 0"
 130         gdb_test "p t_double_int(99.0, 99)" " = 1"
 131         gdb_test "p t_int_double(99, 1.0)" " = 0"
 132         gdb_test "p t_int_double(99, 99.0)" " = 1"
 133     }
 134
 135     if [support_complex_tests] {
 136         gdb_test "p t_float_complex_values(fc1, fc2)" " = 1"
 137         gdb_test "p t_float_complex_values(fc3, fc4)" " = 0"
 138
 139         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"
 140         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"
 141
 142         gdb_test "p t_double_complex_values(dc1, dc2)" " = 1"
 143         gdb_test "p t_double_complex_values(dc3, dc4)" " = 0"
 144
 145         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"
 146         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"
 147
 148         gdb_test "p t_long_double_complex_values(ldc1, ldc2)" " = 1"
 149         gdb_test "p t_long_double_complex_values(ldc3, ldc4)" " = 0"
 150         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"
 151         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"
 152     }
 153
 154     gdb_test "p t_string_values(string_val2,string_val1)" " = 0"
 155     gdb_test "p t_string_values(string_val1,string_val2)" " = 1"
 156     gdb_test "p t_string_values(\"string 1\",\"string 2\")" " = 1"
 157     gdb_test "p t_string_values(\"string 1\",string_val2)" " = 1"
 158     gdb_test "p t_string_values(string_val1,\"string 2\")" " = 1"
 159
 160     gdb_test "p t_char_array_values(char_array_val2,char_array_val1)" " = 0"
 161     gdb_test "p t_char_array_values(char_array_val1,char_array_val2)" " = 1"
 162     gdb_test "p t_char_array_values(\"carray 1\",\"carray 2\")" " = 1"
 163     gdb_test "p t_char_array_values(\"carray 1\",char_array_val2)" " = 1"
 164     gdb_test "p t_char_array_values(char_array_val1,\"carray 2\")" " = 1"
 165
 166     gdb_test "p doubleit(4)" " = 8"
 167     gdb_test "p add(4,5)" " = 9"
 168     gdb_test "p t_func_values(func_val2,func_val1)" " = 0"
 169     gdb_test "p t_func_values(func_val1,func_val2)" " = 1"
 170
 171     gdb_test "p function_struct.func(5)" " = 10"
 172     gdb_test "p function_struct_ptr->func(10)" " = 20"
 173
 174     # GDB currently screws up the passing of function parameters for
 175     # ABIs that use function descriptors.  Instead of passing the
 176     # address of te function descriptor, GDB passes the address of the
 177     # function body.  This results in the called function treating the
 178     # first few instructions of the function proper as a descriptor
 179     # and attempting a jump through that (a totally random address).
 180     setup_kfail gdb/1457 "rs6000*-*-aix*"
 181     setup_kfail gdb/1457 "powerpc*-*-aix*"
 182     gdb_test "p t_func_values(add,func_val2)" " = 1"
 183     setup_kfail gdb/1457 "rs6000*-*-aix*"
 184     setup_kfail gdb/1457 "powerpc*-*-aix*"
 185     gdb_test "p t_func_values(func_val1,doubleit)" " = 1"
 186     setup_kfail gdb/1457 "rs6000*-*-aix*"
 187     setup_kfail gdb/1457 "powerpc*-*-aix*"
 188     gdb_test "p t_call_add(add,3,4)" " = 7"
 189     gdb_test "p t_call_add(func_val1,3,4)" " = 7"
 190
 191     gdb_test "p t_enum_value1(enumval1)" " = 1"
 192     gdb_test "p t_enum_value1(enum_val1)" " = 1"
 193     gdb_test "p t_enum_value1(enum_val2)" " = 0"
 194
 195     gdb_test "p t_enum_value2(enumval2)" " = 1"
 196     gdb_test "p t_enum_value2(enum_val2)" " = 1"
 197     gdb_test "p t_enum_value2(enum_val1)" " = 0"
 198
 199     gdb_test "p sum_args(1,{2})" " = 2"
 200     gdb_test "p sum_args(2,{2,3})" " = 5"
 201     gdb_test "p sum_args(3,{2,3,4})" " = 9"
 202     gdb_test "p sum_args(4,{2,3,4,5})" " = 14"
 203
 204     gdb_test "p sum10 (1, 2, 3, 4, 5, 6, 7, 8, 9, 10)" " = 55"
 205
 206     gdb_test "p cmp10 (0, 1, 2, 3, 4, 5, 6, 7, 8, 9)" " = 1"
 207
 208     gdb_test "p t_structs_c(struct_val1)" "= 120 'x'" \
 209         "call inferior func with struct - returns char"
 210     gdb_test "p t_structs_s(struct_val1)" "= 87" \
 211         "call inferior func with struct - returns short"
 212     gdb_test "p t_structs_i(struct_val1)" "= 76" \
 213         "call inferior func with struct - returns int"
 214     gdb_test "p t_structs_l(struct_val1)" "= 51" \
 215         "call inferior func with struct - returns long"
 216
 217     if {$allow_float_test} {
 218         gdb_test "p t_structs_f(struct_val1)" "= 2.12.*" \
 219             "call inferior func with struct - returns float"
 220         gdb_test "p t_structs_d(struct_val1)" "= 9.87.*" \
 221             "call inferior func with struct - returns double"
 222     }
 223
 224     if [support_complex_tests] {
 225
 226         gdb_test "p t_structs_fc(struct_val1)" ".*= 3 \\+ 3i" \
 227             "call inferior func with struct - returns float _Complex"
 228
 229         gdb_test "p t_structs_dc(struct_val1)" ".*= 4 \\+ 4i" \
 230             "call inferior func with struct - returns double _Complex"
 231
 232         gdb_test "p t_structs_ldc(struct_val1)" "= 5 \\+ 5i" \
 233             "call inferior func with struct - returns long double _Complex"
 234     }
 235
 236     gdb_test "p t_structs_a(struct_val1)" "= (.unsigned char .. )?<.*buf.*> \"foo\"" \
 237         "call inferior func with struct - returns char *"
 238
 239     # Restore default value.
 240     gdb_test_no_output "set unwindonsignal off"
 241 }
 242
 243 # Procedure to get current content of all registers.
 244 proc fetch_all_registers {test} {
 245     global gdb_prompt
 246
 247     set all_registers_lines {}
 248     set bad -1
 249     # Former trailing `\[\r\n\]+' may eat just \r leaving \n in the buffer
 250     # corrupting the next matches.
 251     if {[gdb_test_multiple "info all-registers" $test {
 252         -re "info all-registers\r\n" {
 253             exp_continue
 254         }
 255         -ex "The program has no registers now" {
 256             set bad 1
 257             exp_continue
 258         }
 259         -re "^bspstore\[ \t\]+\[^\r\n\]+\r\n" {
 260             if [istarget "ia64-*-*"] {
 261                 # Filter out bspstore which is specially tied to bsp,
 262                 # giving spurious differences.
 263             } else {
 264                 lappend all_registers_lines $expect_out(0,string)
 265             }
 266             exp_continue
 267         }
 268         -re  "^pstate\[ \t\]+\[^\r\n\]+\r\n" {
 269             if [istarget "sparc64-*-linux-gnu"] {
 270                 # Filter out the pstate register, since in sparc64
 271                 # targets the Linux kernel disables pstate.PEF when
 272                 # returning from traps, giving spurious differences.
 273             } else {
 274                 lappend all_registers_lines $expect_out(0,string)
 275             }
 276             exp_continue
 277         }
 278         -re "^last_break\[ \t\]+\[^\r\n\]+\r\n" {
 279             if [istarget "s390*-*-*"] {
 280                 # Filter out last_break which is read-only,
 281                 # giving spurious differences.
 282             } else {
 283                 lappend all_registers_lines $expect_out(0,string)
 284             }
 285             exp_continue
 286         }
 287         -re "^\(?:cycle\|instret\)\[ \t\]+\[^\r\n\]+\r\n" {
 288             if [istarget "riscv*-*-*"] {
 289                 # Filter out the cycle counter and instructions
 290                 # retired counter CSRs which are read-only, giving
 291                 # spurious differences.
 292             } else {
 293                 lappend all_registers_lines $expect_out(0,string)
 294             }
 295             exp_continue
 296         }
 297         -re "^\[^ \t\]+\[ \t\]+\[^\r\n\]+\r\n" {
 298             lappend all_registers_lines $expect_out(0,string)
 299             exp_continue
 300         }
 301         -re "$gdb_prompt $" {
 302             incr bad
 303         }
 304         -re "^\[^\r\n\]+\r\n" {
 305             if {!$bad} {
 306                 warning "Unrecognized output: $expect_out(0,string)"
 307                 set bad 1
 308             }
 309             exp_continue
 310         }
 311     }] != 0} {
 312         return {}
 313     }
 314
 315     if {$bad} {
 316         fail $test
 317         return {}
 318     }
 319
 320     pass $test
 321     return $all_registers_lines
 322 }
 323
 324 # Global used by RERUN_AND_PREPARE to make test names unique.
 325 set rerun_count 0
 326
 327 proc rerun_and_prepare {} {
 328     global rerun_count
 329
 330     incr rerun_count
 331     with_test_prefix "rerun number ${rerun_count}" {
 332
 333         if { ![runto_main] } {
 334             return
 335         }
 336
 337         gdb_test_no_output "set language c"
 338
 339         get_debug_format
 340
 341         # Make sure that malloc gets called and that the floating
 342         # point unit is initialized via a call to t_double_values.
 343         gdb_test "next" \
 344             "t_double_values\\(double_val1, double_val2\\);.*" \
 345             "next to t_double_values"
 346         gdb_test "next" "t_structs_c\\(struct_val1\\);.*" \
 347             "next to t_structs_c"
 348     }
 349 }
 350
 351 proc perform_all_tests {prototypes} {
 352     gdb_test_no_output "set print sevenbit-strings"
 353     gdb_test_no_output "set print address off"
 354     gdb_test_no_output "set width 0"
 355
 356     rerun_and_prepare
 357
 358     # Save all register contents.
 359     set old_reg_content \
 360         [fetch_all_registers "retrieve original register contents 1"]
 361
 362     # Perform function calls.
 363     do_function_calls $prototypes
 364
 365     # Check if all registers still have the same value.
 366     set new_reg_content [fetch_all_registers \
 367                              "register contents after gdb function calls"]
 368     if {$old_reg_content == $new_reg_content} {
 369         pass "gdb function calls preserve register contents"
 370     } else {
 371         set old_reg_content $new_reg_content
 372         fail "gdb function calls preserve register contents"
 373     }
 374
 375     rerun_and_prepare
 376     # Save all register contents.
 377     set old_reg_content \
 378         [fetch_all_registers "retrieve original register contents 2"]
 379
 380     # Set breakpoint at a function we will call from gdb.
 381     gdb_breakpoint add
 382
 383     # Call function (causing a breakpoint hit in the call dummy) and do a continue,
 384     # make sure we are back at main and still have the same register contents.
 385     gdb_test "print add(4,5)" \
 386         "The program being debugged stopped while.*" \
 387         "stop at breakpoint in call dummy function"
 388     gdb_test "continue" "Continuing.*" "continue from call dummy breakpoint"
 389     if ![gdb_test "bt 2" \
 390              "#0  main.*" \
 391              "bt after continuing from call dummy breakpoint"] then {
 392                  set new_reg_content [fetch_all_registers \
 393                                           "register contents after stop in call dummy"]
 394                  if {$old_reg_content == $new_reg_content} {
 395                      pass "continue after stop in call dummy preserves register contents"
 396                  } else {
 397                      fail "continue after stop in call dummy preserves register contents"
 398                  }
 399              }
 400
 401     rerun_and_prepare
 402     # Set breakpoint at a function we will call from gdb.
 403     gdb_breakpoint add
 404     # Save all register contents.
 405     set old_reg_content \
 406         [fetch_all_registers "retrieve original register contents 3"]
 407
 408     # Call function (causing a breakpoint hit in the call dummy) and do a finish,
 409     # make sure we are back at main and still have the same register contents.
 410     gdb_test "print add(4,5)" "The program being debugged stopped while.*" \
 411         "call function causing a breakpoint then do a finish"
 412     gdb_test "finish" \
 413         "Value returned is .* = 9" \
 414         "finish from call dummy breakpoint returns correct value"
 415     if ![gdb_test "bt 2" \
 416              "#0  main.*" \
 417              "bt after finishing from call dummy breakpoint"] then {
 418                  set new_reg_content [fetch_all_registers \
 419                                           "register contents after finish in call dummy"]
 420                  if {$old_reg_content == $new_reg_content} {
 421                      pass "finish after stop in call dummy preserves register contents"
 422                  } else {
 423                      fail "finish after stop in call dummy preserves register contents"
 424                  }
 425              }
 426
 427     rerun_and_prepare
 428     # Set breakpoint at a function we will call from gdb.
 429     gdb_breakpoint add
 430     # Save all register contents.
 431     set old_reg_content \
 432         [fetch_all_registers "retrieve original register contents 4"]
 433
 434     # Call function (causing a breakpoint hit in the call dummy) and do a return
 435     # with a value, make sure we are back at main with the same register contents.
 436     gdb_test "print add(4,5)" "The program being debugged stopped while.*" \
 437         "call function causing a breakpoint and then do a return"
 438     if ![gdb_test "return 7" \
 439              "#0  main.*" \
 440              "back at main after return from call dummy breakpoint" \
 441              "Make add return now. .y or n.*" \
 442              "y"] then {
 443                  set new_reg_content [fetch_all_registers \
 444                                           "register contents after return in call dummy"]
 445                  if {$old_reg_content == $new_reg_content} {
 446                      pass "return after stop in call dummy preserves register contents"
 447                  } else {
 448                      fail "return after stop in call dummy preserves register contents"
 449                  }
 450              }
 451
 452     rerun_and_prepare
 453     # Set breakpoint at a function we will call from gdb.
 454     gdb_breakpoint add
 455     set old_reg_content \
 456         [fetch_all_registers "retrieve original register contents 5"]
 457
 458     # Call function (causing a breakpoint hit in the call dummy), and
 459     # call another function from the call dummy frame (thereby setting up
 460     # several nested call dummy frames).  Test that backtrace and finish
 461     # work when several call dummies are nested.
 462     gdb_breakpoint sum10
 463     gdb_breakpoint t_small_values
 464     gdb_test "print add(2,3)" "The program being debugged stopped while.*" \
 465         "stop at nested call level 1"
 466     gdb_test "backtrace" \
 467         "\#0  add \\(a=2, b=3\\).*\#1  <function called from gdb>.*\#2  main.*" \
 468         "backtrace at nested call level 1"
 469     gdb_test "print add(4,5)" "The program being debugged stopped while.*" \
 470         "stop at nested call level 2"
 471     gdb_test "backtrace" \
 472         "\#0  add \\(a=4, b=5\\).*\#1  <function called from gdb>.*\#2  add \\(a=2, b=3\\).*\#3  <function called from gdb>.*\#4  main.*" \
 473         "backtrace at nested call level 2"
 474     gdb_test "print sum10(2,4,6,8,10,12,14,16,18,20)" \
 475         "The program being debugged stopped while.*" \
 476         "stop at nested call level 3"
 477     gdb_test "backtrace" \
 478         "\#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.*" \
 479         "backtrace at nested call level 3"
 480     gdb_test "print t_small_values(1,3,5,7,9,11,13,15,17,19)" \
 481         "The program being debugged stopped while.*" \
 482         "stop at nested call level 4"
 483     gdb_test "backtrace" \
 484         "\#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.*" \
 485         "backtrace at nested call level 4"
 486     gdb_test "finish" "Value returned is .* = 100" \
 487         "Finish from nested call level 4"
 488     gdb_test "backtrace" \
 489         "\#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.*" \
 490         "backtrace after finish from nested call level 4"
 491     gdb_test "finish" "Value returned is .* = 110" \
 492         "Finish from nested call level 3"
 493     gdb_test "backtrace" \
 494         "\#0  add \\(a=4, b=5\\).*\#1  <function called from gdb>.*\#2  add \\(a=2, b=3\\).*\#3  <function called from gdb>.*\#4  main.*" \
 495         "backtrace after finish from nested call level 3"
 496     gdb_test "finish" "Value returned is .* = 9" \
 497         "Finish from nested call level 2"
 498     gdb_test "backtrace" \
 499         "\#0  add \\(a=2, b=3\\).*\#1  <function called from gdb>.*\#2  main.*" \
 500         "backtrace after finish from nested call level 2"
 501     gdb_test "finish" "Value returned is .* = 5" \
 502         "Finish from nested call level 1"
 503     gdb_test "backtrace" "\#0  main .*" \
 504         "backtrace after finish from nested call level 1"
 505
 506     set new_reg_content [fetch_all_registers \
 507                              "register contents after nested call dummies"]
 508     if {$old_reg_content == $new_reg_content} {
 509         pass "nested call dummies preserve register contents"
 510     } else {
 511         fail "nested call dummies preserve register contents"
 512     }
 513
 514     # GDB should not crash by internal error on $sp underflow during the inferior
 515     # call.  It is OK it will stop on some: Cannot access memory at address 0x$hex.
 516
 517     if {![target_info exists gdb,nosignals] && ![istarget "*-*-uclinux*"]} {
 518         gdb_test {set $old_sp = $sp}
 519
 520         gdb_test {set $sp = 0}
 521         gdb_test "call doubleit (1)" ".*" "sp == 0: call doubleit (1)"
 522
 523         gdb_test {set $sp = -1}
 524         gdb_test "call doubleit (1)" ".*" "sp == -1: call doubleit (1)"
 525
 526         gdb_test {set $sp = $old_sp}
 527     }
 528
 529     # Test function descriptor resolution - the separate debug info .opd section
 530     # handling vs. local labels `.L'... as `Lcallfunc' starts with `L'.
 531
 532     gdb_test "print callfunc (Lcallfunc, 5)" " = 12"
 533
 534     # Regression test for function pointer cast.
 535     gdb_test "print *((int *(*) (void)) voidfunc)()" " = 23"
 536 }
 537
 538 # Perform all tests with and without function prototypes.
 539
 540 if { ![prepare_for_testing "failed to prepare" $testfile $srcfile "$compile_flags additional_flags=-DPROTOTYPES"] } {
 541     perform_all_tests 1
 542 }
 543
 544 if { ![prepare_for_testing "failed to prepare" $testfile $srcfile "$compile_flags additional_flags=-DNO_PROTOTYPES"] } {
 545     with_test_prefix "noproto" {
 546         perform_all_tests 0
 547     }
 548 }