gdb/testsuite/gdb.base/callfuncs.exp

   1 # Copyright 1992-2018 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 {prototypes} {
  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 {!$skip_float_test} {
  77         gdb_test "p t_float_values(0.0,0.0)" " = 0"
  78
  79         # These next four tests fail on the mn10300.
  80         # The first value is passed in regs, the other in memory.
  81         # Gcc emits different stabs for the two parameters; the first is
  82         # claimed to be a float, the second a double.
  83         # dbxout.c in gcc claims this is the desired behavior.
  84         # These tests also fail for RealView, because GDB can not tell that
  85         # the function is unprototyped.
  86         setup_xfail "mn10300-*-*"
  87         if { [test_compiler_info "armcc-*"] } { setup_xfail "*-*-*" }
  88         gdb_test "p t_float_values(3.14159,-2.3765)" " = 1"
  89         setup_xfail "mn10300-*-*"
  90         if { [test_compiler_info "armcc-*"] } { setup_xfail "*-*-*" }
  91         gdb_test "p t_float_values(float_val1,float_val2)" " = 1"
  92         setup_xfail "mn10300-*-*"
  93         if { [test_compiler_info "armcc-*"] } { setup_xfail "*-*-*" }
  94         gdb_test "p t_float_values(3.14159,float_val2)" " = 1"
  95         setup_xfail "mn10300-*-*"
  96         if { [test_compiler_info "armcc-*"] } { setup_xfail "*-*-*" }
  97         gdb_test "p t_float_values(float_val1,-2.3765)" " = 1"
  98         # Same, via unprototyped function pointer (t_float_values is
  99         # always unprototyped).
 100         gdb_test "p ((int (*) ()) t_float_values)(float_val1,-2.3765)" " = 1"
 101
 102         # Test passing of arguments which might not be widened.
 103         gdb_test "p t_float_values2(0.0,0.0)" " = 0"
 104         # Same, via function pointer.
 105         if {$prototypes} {
 106             gdb_test "p ((int (*) (float, float)) t_float_values2)(0.0,0.0)" " = 0"
 107         } else {
 108             gdb_test "p ((int (*) ()) t_float_values2)(0.0,0.0)" " = 0"
 109         }
 110
 111         gdb_test "p t_float_values2(3.14159,float_val2)" " = 1"
 112         if {$prototypes} {
 113             gdb_test "p ((int (*) (float, float)) t_float_values2)(3.14159,float_val2)" " = 1"
 114         } else {
 115             gdb_test "p ((int (*) ()) t_float_values2)(3.14159,float_val2)" " = 1"
 116         }
 117
 118         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."
 119
 120         gdb_test "p t_small_values(1,2,3,4,5,6,7,8,9,10)" " = 55"
 121
 122         gdb_test "p t_double_values(0.0,0.0)" " = 0"
 123         gdb_test "p t_double_values(45.654,-67.66)" " = 1"
 124         gdb_test "p t_double_values(double_val1,double_val2)" " = 1"
 125         gdb_test "p t_double_values(45.654,double_val2)" " = 1"
 126         gdb_test "p t_double_values(double_val1,-67.66)" " = 1"
 127
 128         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."
 129
 130         gdb_test "p t_double_int(99.0, 1)" " = 0"
 131         gdb_test "p t_double_int(99.0, 99)" " = 1"
 132         gdb_test "p t_int_double(99, 1.0)" " = 0"
 133         gdb_test "p t_int_double(99, 99.0)" " = 1"
 134     }
 135
 136     if [support_complex_tests] {
 137         gdb_test "p t_float_complex_values(fc1, fc2)" " = 1"
 138         gdb_test "p t_float_complex_values(fc3, fc4)" " = 0"
 139
 140         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"
 141         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"
 142
 143         gdb_test "p t_double_complex_values(dc1, dc2)" " = 1"
 144         gdb_test "p t_double_complex_values(dc3, dc4)" " = 0"
 145
 146         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"
 147         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"
 148
 149         gdb_test "p t_long_double_complex_values(ldc1, ldc2)" " = 1"
 150         gdb_test "p t_long_double_complex_values(ldc3, ldc4)" " = 0"
 151         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"
 152         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"
 153     }
 154
 155     gdb_test "p t_string_values(string_val2,string_val1)" " = 0"
 156     gdb_test "p t_string_values(string_val1,string_val2)" " = 1"
 157     gdb_test "p t_string_values(\"string 1\",\"string 2\")" " = 1"
 158     gdb_test "p t_string_values(\"string 1\",string_val2)" " = 1"
 159     gdb_test "p t_string_values(string_val1,\"string 2\")" " = 1"
 160
 161     gdb_test "p t_char_array_values(char_array_val2,char_array_val1)" " = 0"
 162     gdb_test "p t_char_array_values(char_array_val1,char_array_val2)" " = 1"
 163     gdb_test "p t_char_array_values(\"carray 1\",\"carray 2\")" " = 1"
 164     gdb_test "p t_char_array_values(\"carray 1\",char_array_val2)" " = 1"
 165     gdb_test "p t_char_array_values(char_array_val1,\"carray 2\")" " = 1"
 166
 167     gdb_test "p doubleit(4)" " = 8"
 168     gdb_test "p add(4,5)" " = 9"
 169     gdb_test "p t_func_values(func_val2,func_val1)" " = 0"
 170     gdb_test "p t_func_values(func_val1,func_val2)" " = 1"
 171
 172     gdb_test "p function_struct.func(5)" " = 10"
 173     gdb_test "p function_struct_ptr->func(10)" " = 20"
 174
 175     # GDB currently screws up the passing of function parameters for
 176     # ABIs that use function descriptors.  Instead of passing the
 177     # address of te function descriptor, GDB passes the address of the
 178     # function body.  This results in the called function treating the
 179     # first few instructions of the function proper as a descriptor
 180     # and attempting a jump through that (a totally random address).
 181     setup_kfail gdb/1457 "rs6000*-*-aix*"
 182     setup_kfail gdb/1457 "powerpc*-*-aix*"
 183     gdb_test "p t_func_values(add,func_val2)" " = 1"
 184     setup_kfail gdb/1457 "rs6000*-*-aix*"
 185     setup_kfail gdb/1457 "powerpc*-*-aix*"
 186     gdb_test "p t_func_values(func_val1,doubleit)" " = 1"
 187     setup_kfail gdb/1457 "rs6000*-*-aix*"
 188     setup_kfail gdb/1457 "powerpc*-*-aix*"
 189     gdb_test "p t_call_add(add,3,4)" " = 7"
 190     gdb_test "p t_call_add(func_val1,3,4)" " = 7"
 191
 192     gdb_test "p t_enum_value1(enumval1)" " = 1"
 193     gdb_test "p t_enum_value1(enum_val1)" " = 1"
 194     gdb_test "p t_enum_value1(enum_val2)" " = 0"
 195
 196     gdb_test "p t_enum_value2(enumval2)" " = 1"
 197     gdb_test "p t_enum_value2(enum_val2)" " = 1"
 198     gdb_test "p t_enum_value2(enum_val1)" " = 0"
 199
 200     gdb_test "p sum_args(1,{2})" " = 2"
 201     gdb_test "p sum_args(2,{2,3})" " = 5"
 202     gdb_test "p sum_args(3,{2,3,4})" " = 9"
 203     gdb_test "p sum_args(4,{2,3,4,5})" " = 14"
 204
 205     gdb_test "p sum10 (1, 2, 3, 4, 5, 6, 7, 8, 9, 10)" " = 55"
 206
 207     gdb_test "p cmp10 (0, 1, 2, 3, 4, 5, 6, 7, 8, 9)" " = 1"
 208
 209     gdb_test "p t_structs_c(struct_val1)" "= 120 'x'" \
 210         "call inferior func with struct - returns char"
 211     gdb_test "p t_structs_s(struct_val1)" "= 87" \
 212         "call inferior func with struct - returns short"
 213     gdb_test "p t_structs_i(struct_val1)" "= 76" \
 214         "call inferior func with struct - returns int"
 215     gdb_test "p t_structs_l(struct_val1)" "= 51" \
 216         "call inferior func with struct - returns long"
 217
 218     if {!$skip_float_test} {
 219         gdb_test "p t_structs_f(struct_val1)" "= 2.12.*" \
 220             "call inferior func with struct - returns float"
 221         gdb_test "p t_structs_d(struct_val1)" "= 9.87.*" \
 222             "call inferior func with struct - returns double"
 223     }
 224
 225     if [support_complex_tests] {
 226
 227         gdb_test "p t_structs_fc(struct_val1)" ".*= 3 \\+ 3 \\* I" \
 228             "call inferior func with struct - returns float _Complex"
 229
 230         gdb_test "p t_structs_dc(struct_val1)" ".*= 4 \\+ 4 \\* I" \
 231             "call inferior func with struct - returns double _Complex"
 232
 233         gdb_test "p t_structs_ldc(struct_val1)" "= 5 \\+ 5 \\* I" \
 234             "call inferior func with struct - returns long double _Complex"
 235     }
 236
 237     gdb_test "p t_structs_a(struct_val1)" "= (.unsigned char .. )?<.*buf.*> \"foo\"" \
 238         "call inferior func with struct - returns char *"
 239
 240     # Restore default value.
 241     gdb_test_no_output "set unwindonsignal off"
 242 }
 243
 244 # Procedure to get current content of all registers.
 245 proc fetch_all_registers {test} {
 246     global gdb_prompt
 247
 248     set all_registers_lines {}
 249     set bad -1
 250     # Former trailing `\[\r\n\]+' may eat just \r leaving \n in the buffer
 251     # corrupting the next matches.
 252     if {[gdb_test_multiple "info all-registers" $test {
 253         -re "info all-registers\r\n" {
 254             exp_continue
 255         }
 256         -ex "The program has no registers now" {
 257             set bad 1
 258             exp_continue
 259         }
 260         -re "^bspstore\[ \t\]+\[^\r\n\]+\r\n" {
 261             if [istarget "ia64-*-*"] {
 262                 # Filter out bspstore which is specially tied to bsp,
 263                 # giving spurious differences.
 264             } else {
 265                 lappend all_registers_lines $expect_out(0,string)
 266             }
 267             exp_continue
 268         }
 269         -re  "^pstate\[ \t\]+\[^\r\n\]+\r\n" {
 270             if [istarget "sparc64-*-linux-gnu"] {
 271                 # Filter out the pstate register, since in sparc64
 272                 # targets the Linux kernel disables pstate.PEF when
 273                 # returning from traps, giving spurious differences.
 274             } else {
 275                 lappend all_registers_lines $expect_out(0,string)
 276             }
 277             exp_continue
 278         }
 279         -re "^last_break\[ \t\]+\[^\r\n\]+\r\n" {
 280             if [istarget "s390*-*-*"] {
 281                 # Filter out last_break which is read-only,
 282                 # giving spurious differences.
 283             } else {
 284                 lappend all_registers_lines $expect_out(0,string)
 285             }
 286             exp_continue
 287         }
 288         -re "^\(?:cycle\|instret\)\[ \t\]+\[^\r\n\]+\r\n" {
 289             if [istarget "riscv*-*-*"] {
 290                 # Filter out the cycle counter and instructions
 291                 # retired counter CSRs which are read-only, giving
 292                 # spurious differences.
 293             } else {
 294                 lappend all_registers_lines $expect_out(0,string)
 295             }
 296             exp_continue
 297         }
 298         -re "^\[^ \t\]+\[ \t\]+\[^\r\n\]+\r\n" {
 299             lappend all_registers_lines $expect_out(0,string)
 300             exp_continue
 301         }
 302         -re "$gdb_prompt $" {
 303             incr bad
 304         }
 305         -re "^\[^\r\n\]+\r\n" {
 306             if {!$bad} {
 307                 warning "Unrecognized output: $expect_out(0,string)"
 308                 set bad 1
 309             }
 310             exp_continue
 311         }
 312     }] != 0} {
 313         return {}
 314     }
 315
 316     if {$bad} {
 317         fail $test
 318         return {}
 319     }
 320
 321     pass $test
 322     return $all_registers_lines
 323 }
 324
 325 proc rerun_and_prepare {} {
 326     if { ![runto_main] } {
 327         gdb_suppress_tests
 328     }
 329
 330     gdb_test_no_output "set language c"
 331
 332     get_debug_format
 333
 334     # Make sure that malloc gets called and that the floating point unit
 335     # is initialized via a call to t_double_values.
 336     gdb_test "next" "t_double_values\\(double_val1, double_val2\\);.*" \
 337         "next to t_double_values"
 338     gdb_test "next" "t_structs_c\\(struct_val1\\);.*" \
 339         "next to t_structs_c"
 340 }
 341
 342 proc perform_all_tests {prototypes} {
 343     gdb_test_no_output "set print sevenbit-strings"
 344     gdb_test_no_output "set print address off"
 345     gdb_test_no_output "set width 0"
 346
 347     rerun_and_prepare
 348
 349     # Save all register contents.
 350     set old_reg_content [fetch_all_registers "retrieve original register contents"]
 351
 352     # Perform function calls.
 353     do_function_calls $prototypes
 354
 355     # Check if all registers still have the same value.
 356     set new_reg_content [fetch_all_registers \
 357                              "register contents after gdb function calls"]
 358     if {$old_reg_content == $new_reg_content} then {
 359         pass "gdb function calls preserve register contents"
 360     } else {
 361         set old_reg_content $new_reg_content
 362         fail "gdb function calls preserve register contents"
 363     }
 364
 365     rerun_and_prepare
 366     # Save all register contents.
 367     set old_reg_content [fetch_all_registers "retrieve original register contents"]
 368
 369     # Set breakpoint at a function we will call from gdb.
 370     gdb_breakpoint add
 371
 372     # Call function (causing a breakpoint hit in the call dummy) and do a continue,
 373     # make sure we are back at main and still have the same register contents.
 374     gdb_test "print add(4,5)" \
 375         "The program being debugged stopped while.*" \
 376         "stop at breakpoint in call dummy function"
 377     gdb_test "continue" "Continuing.*" "continue from call dummy breakpoint"
 378     if ![gdb_test "bt 2" \
 379              "#0  main.*" \
 380              "bt after continuing from call dummy breakpoint"] then {
 381                  set new_reg_content [fetch_all_registers \
 382                                           "register contents after stop in call dummy"]
 383                  if {$old_reg_content == $new_reg_content} then {
 384                      pass "continue after stop in call dummy preserves register contents"
 385                  } else {
 386                      fail "continue after stop in call dummy preserves register contents"
 387                  }
 388              }
 389
 390     rerun_and_prepare
 391     # Set breakpoint at a function we will call from gdb.
 392     gdb_breakpoint add
 393     # Save all register contents.
 394     set old_reg_content [fetch_all_registers "retrieve original register contents"]
 395
 396     # Call function (causing a breakpoint hit in the call dummy) and do a finish,
 397     # make sure we are back at main and still have the same register contents.
 398     gdb_test "print add(4,5)" "The program being debugged stopped while.*" \
 399         "call function causing a breakpoint then do a finish"
 400     gdb_test "finish" \
 401         "Value returned is .* = 9" \
 402         "finish from call dummy breakpoint returns correct value"
 403     if ![gdb_test "bt 2" \
 404              "#0  main.*" \
 405              "bt after finishing from call dummy breakpoint"] then {
 406                  set new_reg_content [fetch_all_registers \
 407                                           "register contents after finish in call dummy"]
 408                  if {$old_reg_content == $new_reg_content} then {
 409                      pass "finish after stop in call dummy preserves register contents"
 410                  } else {
 411                      fail "finish after stop in call dummy preserves register contents"
 412                  }
 413              }
 414
 415     rerun_and_prepare
 416     # Set breakpoint at a function we will call from gdb.
 417     gdb_breakpoint add
 418     # Save all register contents.
 419     set old_reg_content [fetch_all_registers "retrieve original register contents"]
 420
 421     # Call function (causing a breakpoint hit in the call dummy) and do a return
 422     # with a value, make sure we are back at main with the same register contents.
 423     gdb_test "print add(4,5)" "The program being debugged stopped while.*" \
 424         "call function causing a breakpoint and then do a return"
 425     if ![gdb_test "return 7" \
 426              "#0  main.*" \
 427              "back at main after return from call dummy breakpoint" \
 428              "Make add return now. .y or n.*" \
 429              "y"] then {
 430                  set new_reg_content [fetch_all_registers \
 431                                           "register contents after return in call dummy"]
 432                  if {$old_reg_content == $new_reg_content} then {
 433                      pass "return after stop in call dummy preserves register contents"
 434                  } else {
 435                      fail "return after stop in call dummy preserves register contents"
 436                  }
 437              }
 438
 439     rerun_and_prepare
 440     # Set breakpoint at a function we will call from gdb.
 441     gdb_breakpoint add
 442     set old_reg_content [fetch_all_registers "retrieve original register contents"]
 443
 444     # Call function (causing a breakpoint hit in the call dummy), and
 445     # call another function from the call dummy frame (thereby setting up
 446     # several nested call dummy frames).  Test that backtrace and finish
 447     # work when several call dummies are nested.
 448     gdb_breakpoint sum10
 449     gdb_breakpoint t_small_values
 450     gdb_test "print add(2,3)" "The program being debugged stopped while.*" \
 451         "stop at nested call level 1"
 452     gdb_test "backtrace" \
 453         "\#0  add \\(a=2, b=3\\).*\#1  <function called from gdb>.*\#2  main.*" \
 454         "backtrace at nested call level 1"
 455     gdb_test "print add(4,5)" "The program being debugged stopped while.*" \
 456         "stop at nested call level 2"
 457     gdb_test "backtrace" \
 458         "\#0  add \\(a=4, b=5\\).*\#1  <function called from gdb>.*\#2  add \\(a=2, b=3\\).*\#3  <function called from gdb>.*\#4  main.*" \
 459         "backtrace at nested call level 2"
 460     gdb_test "print sum10(2,4,6,8,10,12,14,16,18,20)" \
 461         "The program being debugged stopped while.*" \
 462         "stop at nested call level 3"
 463     gdb_test "backtrace" \
 464         "\#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.*" \
 465         "backtrace at nested call level 3"
 466     gdb_test "print t_small_values(1,3,5,7,9,11,13,15,17,19)" \
 467         "The program being debugged stopped while.*" \
 468         "stop at nested call level 4"
 469     gdb_test "backtrace" \
 470         "\#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.*" \
 471         "backtrace at nested call level 4"
 472     gdb_test "finish" "Value returned is .* = 100" \
 473         "Finish from nested call level 4"
 474     gdb_test "backtrace" \
 475         "\#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.*" \
 476         "backtrace after finish from nested call level 4"
 477     gdb_test "finish" "Value returned is .* = 110" \
 478         "Finish from nested call level 3"
 479     gdb_test "backtrace" \
 480         "\#0  add \\(a=4, b=5\\).*\#1  <function called from gdb>.*\#2  add \\(a=2, b=3\\).*\#3  <function called from gdb>.*\#4  main.*" \
 481         "backtrace after finish from nested call level 3"
 482     gdb_test "finish" "Value returned is .* = 9" \
 483         "Finish from nested call level 2"
 484     gdb_test "backtrace" \
 485         "\#0  add \\(a=2, b=3\\).*\#1  <function called from gdb>.*\#2  main.*" \
 486         "backtrace after finish from nested call level 2"
 487     gdb_test "finish" "Value returned is .* = 5" \
 488         "Finish from nested call level 1"
 489     gdb_test "backtrace" "\#0  main .*" \
 490         "backtrace after finish from nested call level 1"
 491
 492     set new_reg_content [fetch_all_registers \
 493                              "register contents after nested call dummies"]
 494     if {$old_reg_content == $new_reg_content} then {
 495         pass "nested call dummies preserve register contents"
 496     } else {
 497         fail "nested call dummies preserve register contents"
 498     }
 499
 500     # GDB should not crash by internal error on $sp underflow during the inferior
 501     # call.  It is OK it will stop on some: Cannot access memory at address 0x$hex.
 502
 503     if {![target_info exists gdb,nosignals] && ![istarget "*-*-uclinux*"]} {
 504         gdb_test {set $old_sp = $sp}
 505
 506         gdb_test {set $sp = 0}
 507         gdb_test "call doubleit (1)" ".*" "sp == 0: call doubleit (1)"
 508
 509         gdb_test {set $sp = -1}
 510         gdb_test "call doubleit (1)" ".*" "sp == -1: call doubleit (1)"
 511
 512         gdb_test {set $sp = $old_sp}
 513     }
 514
 515     # Test function descriptor resolution - the separate debug info .opd section
 516     # handling vs. local labels `.L'... as `Lcallfunc' starts with `L'.
 517
 518     gdb_test "print callfunc (Lcallfunc, 5)" " = 12"
 519
 520     # Regression test for function pointer cast.
 521     gdb_test "print *((int *(*) (void)) voidfunc)()" " = 23"
 522 }
 523
 524 # Perform all tests with and without function prototypes.
 525
 526 if { ![prepare_for_testing "failed to prepare" $testfile $srcfile "$compile_flags additional_flags=-DPROTOTYPES"] } {
 527     perform_all_tests 1
 528 }
 529
 530 if { ![prepare_for_testing "failed to prepare" $testfile $srcfile "$compile_flags additional_flags=-DNO_PROTOTYPES"] } {
 531     with_test_prefix "noproto" {
 532         perform_all_tests 0
 533     }
 534 }