gdb/testsuite/gdb.base/callfuncs.exp

   1 # Copyright 1992, 1994-2004, 2007-2012 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 set testfile "callfuncs"
  20 set srcfile ${testfile}.c
  21 set binfile ${objdir}/${subdir}/${testfile}
  22
  23 set compile_flags {debug}
  24 if [support_complex_tests] {
  25     lappend compile_flags "additional_flags=-DTEST_COMPLEX"
  26 }
  27
  28 if  { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable $compile_flags] != "" } {
  29      untested callfuncs.exp
  30      return -1
  31 }
  32
  33 # Create and source the file that provides information about the compiler
  34 # used to compile the test case.
  35
  36 if [get_compiler_info] {
  37     return -1;
  38 }
  39
  40 if {$hp_aCC_compiler} {
  41     set prototypes 1
  42 } else {
  43     set prototypes 0
  44 }
  45
  46 # Some targets can't do function calls, so don't even bother with this
  47 # test.
  48 if [target_info exists gdb,cannot_call_functions] {
  49     setup_xfail "*-*-*" 2416
  50     fail "This target can not call functions"
  51     continue
  52 }
  53
  54 # FIXME:  Before calling this proc, we should probably verify that
  55 # we can call inferior functions and get a valid integral value
  56 # returned.
  57 # Note that it is OK to check for 0 or 1 as the returned values, because C
  58 # specifies that the numeric value of a relational or logical expression
  59 # (computed in the inferior) is 1 for true and 0 for false.
  60
  61 proc do_function_calls {} {
  62     global prototypes
  63     global gdb_prompt
  64
  65     # We need to up this because this can be really slow on some boards.
  66     set timeout 60;
  67
  68     # If any of these calls segv we don't want to affect subsequent tests.
  69     # E.g., we want to ensure register values are restored.
  70     gdb_test_no_output "set unwindonsignal on"
  71
  72     gdb_test "p t_char_values(0,0)" " = 0"
  73     gdb_test "p t_char_values('a','b')" " = 1"
  74     gdb_test "p t_char_values(char_val1,char_val2)" " = 1"
  75     gdb_test "p t_char_values('a',char_val2)" " = 1"
  76     gdb_test "p t_char_values(char_val1,'b')" " = 1"
  77
  78     gdb_test "p t_short_values(0,0)" " = 0"
  79     gdb_test "p t_short_values(10,-23)" " = 1"
  80     gdb_test "p t_short_values(short_val1,short_val2)" " = 1"
  81     gdb_test "p t_short_values(10,short_val2)" " = 1"
  82     gdb_test "p t_short_values(short_val1,-23)" " = 1"
  83
  84     gdb_test "p t_int_values(0,0)" " = 0"
  85     gdb_test "p t_int_values(87,-26)" " = 1"
  86     gdb_test "p t_int_values(int_val1,int_val2)" " = 1"
  87     gdb_test "p t_int_values(87,int_val2)" " = 1"
  88     gdb_test "p t_int_values(int_val1,-26)" " = 1"
  89
  90     gdb_test "p t_long_values(0,0)" " = 0"
  91     gdb_test "p t_long_values(789,-321)" " = 1"
  92     gdb_test "p t_long_values(long_val1,long_val2)" " = 1"
  93     gdb_test "p t_long_values(789,long_val2)" " = 1"
  94     gdb_test "p t_long_values(long_val1,-321)" " = 1"
  95
  96     if ![target_info exists gdb,skip_float_tests] {
  97         gdb_test "p t_float_values(0.0,0.0)" " = 0"
  98
  99         # These next four tests fail on the mn10300.
 100         # The first value is passed in regs, the other in memory.
 101         # Gcc emits different stabs for the two parameters; the first is
 102         # claimed to be a float, the second a double.
 103         # dbxout.c in gcc claims this is the desired behavior.
 104         # These tests also fail for RealView, because GDB can not tell that
 105         # the function is unprototyped.
 106         setup_xfail "mn10300-*-*"
 107         if { [test_compiler_info "armcc-*"] } { setup_xfail "*-*-*" }
 108         gdb_test "p t_float_values(3.14159,-2.3765)" " = 1"
 109         setup_xfail "mn10300-*-*"
 110         if { [test_compiler_info "armcc-*"] } { setup_xfail "*-*-*" }
 111         gdb_test "p t_float_values(float_val1,float_val2)" " = 1"
 112         setup_xfail "mn10300-*-*"
 113         if { [test_compiler_info "armcc-*"] } { setup_xfail "*-*-*" }
 114         gdb_test "p t_float_values(3.14159,float_val2)" " = 1"
 115         setup_xfail "mn10300-*-*"
 116         if { [test_compiler_info "armcc-*"] } { setup_xfail "*-*-*" }
 117         gdb_test "p t_float_values(float_val1,-2.3765)" " = 1"
 118
 119         # Test passing of arguments which might not be widened.
 120         gdb_test "p t_float_values2(0.0,0.0)" " = 0"
 121
 122         # Although PR 5318 mentions SunOS specifically, this seems
 123         # to be a generic problem on quite a few platforms.
 124         if $prototypes then {
 125             setup_xfail "sparc-*-*" "mips*-*-*" 5318
 126             if { ! [test_compiler_info gcc-*-*] } then {
 127                 setup_xfail "alpha-dec-osf2*" "i*86-*-sysv4*" 5318
 128             }
 129         }
 130
 131         gdb_test "p t_float_values2(3.14159,float_val2)" " = 1"
 132
 133         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."
 134
 135         gdb_test "p t_small_values(1,2,3,4,5,6,7,8,9,10)" " = 55"
 136
 137         gdb_test "p t_double_values(0.0,0.0)" " = 0"
 138         gdb_test "p t_double_values(45.654,-67.66)" " = 1"
 139         gdb_test "p t_double_values(double_val1,double_val2)" " = 1"
 140         gdb_test "p t_double_values(45.654,double_val2)" " = 1"
 141         gdb_test "p t_double_values(double_val1,-67.66)" " = 1"
 142
 143         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."
 144
 145         gdb_test "p t_double_int(99.0, 1)" " = 0"
 146         gdb_test "p t_double_int(99.0, 99)" " = 1"
 147         gdb_test "p t_int_double(99, 1.0)" " = 0"
 148         gdb_test "p t_int_double(99, 99.0)" " = 1"
 149     }
 150
 151     if [support_complex_tests] {
 152         gdb_test "p t_float_complex_values(fc1, fc2)" " = 1"
 153         gdb_test "p t_float_complex_values(fc3, fc4)" " = 0"
 154
 155         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"
 156         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"
 157
 158         gdb_test "p t_double_complex_values(dc1, dc2)" " = 1"
 159         gdb_test "p t_double_complex_values(dc3, dc4)" " = 0"
 160
 161         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"
 162         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"
 163
 164         gdb_test "p t_long_double_complex_values(ldc1, ldc2)" " = 1"
 165         gdb_test "p t_long_double_complex_values(ldc3, ldc4)" " = 0"
 166         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"
 167         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"
 168     }
 169
 170     gdb_test "p t_string_values(string_val2,string_val1)" " = 0"
 171     gdb_test "p t_string_values(string_val1,string_val2)" " = 1"
 172     gdb_test "p t_string_values(\"string 1\",\"string 2\")" " = 1"
 173     gdb_test "p t_string_values(\"string 1\",string_val2)" " = 1"
 174     gdb_test "p t_string_values(string_val1,\"string 2\")" " = 1"
 175
 176     gdb_test "p t_char_array_values(char_array_val2,char_array_val1)" " = 0"
 177     gdb_test "p t_char_array_values(char_array_val1,char_array_val2)" " = 1"
 178     gdb_test "p t_char_array_values(\"carray 1\",\"carray 2\")" " = 1"
 179     gdb_test "p t_char_array_values(\"carray 1\",char_array_val2)" " = 1"
 180     gdb_test "p t_char_array_values(char_array_val1,\"carray 2\")" " = 1"
 181
 182     gdb_test "p doubleit(4)" " = 8"
 183     gdb_test "p add(4,5)" " = 9"
 184     gdb_test "p t_func_values(func_val2,func_val1)" " = 0"
 185     gdb_test "p t_func_values(func_val1,func_val2)" " = 1"
 186
 187     gdb_test "p function_struct.func(5)" " = 10"
 188     gdb_test "p function_struct_ptr->func(10)" " = 20"
 189
 190     # GDB currently screws up the passing of function parameters for
 191     # ABIs that use function descriptors.  Instead of passing the
 192     # address of te function descriptor, GDB passes the address of the
 193     # function body.  This results in the called function treating the
 194     # first few instructions of the function proper as a descriptor
 195     # and attempting a jump through that (a totally random address).
 196     setup_kfail gdb/1457 "rs6000*-*-aix*"
 197     setup_kfail gdb/1457 "powerpc*-*-aix*"
 198     setup_kfail gdb/1457 hppa*-*-hpux*
 199     gdb_test "p t_func_values(add,func_val2)" " = 1"
 200     setup_kfail gdb/1457 "rs6000*-*-aix*"
 201     setup_kfail gdb/1457 "powerpc*-*-aix*"
 202     setup_kfail gdb/1457 hppa*-*-hpux*
 203     gdb_test "p t_func_values(func_val1,doubleit)" " = 1"
 204     setup_kfail gdb/1457 "rs6000*-*-aix*"
 205     setup_kfail gdb/1457 "powerpc*-*-aix*"
 206     setup_kfail gdb/1457 hppa*-*-hpux*
 207     gdb_test "p t_call_add(add,3,4)" " = 7"
 208     gdb_test "p t_call_add(func_val1,3,4)" " = 7"
 209
 210     gdb_test "p t_enum_value1(enumval1)" " = 1"
 211     gdb_test "p t_enum_value1(enum_val1)" " = 1"
 212     gdb_test "p t_enum_value1(enum_val2)" " = 0"
 213
 214     gdb_test "p t_enum_value2(enumval2)" " = 1"
 215     gdb_test "p t_enum_value2(enum_val2)" " = 1"
 216     gdb_test "p t_enum_value2(enum_val1)" " = 0"
 217
 218     gdb_test "p sum_args(1,{2})" " = 2"
 219     gdb_test "p sum_args(2,{2,3})" " = 5"
 220     gdb_test "p sum_args(3,{2,3,4})" " = 9"
 221     gdb_test "p sum_args(4,{2,3,4,5})" " = 14"
 222
 223     gdb_test "p sum10 (1, 2, 3, 4, 5, 6, 7, 8, 9, 10)" " = 55"
 224
 225     gdb_test "p cmp10 (0, 1, 2, 3, 4, 5, 6, 7, 8, 9)" " = 1"
 226
 227     gdb_test "p t_structs_c(struct_val1)" "= 120 'x'" \
 228         "call inferior func with struct - returns char"
 229     gdb_test "p t_structs_s(struct_val1)" "= 87" \
 230         "call inferior func with struct - returns short"
 231     gdb_test "p t_structs_i(struct_val1)" "= 76" \
 232         "call inferior func with struct - returns int"
 233     gdb_test "p t_structs_l(struct_val1)" "= 51" \
 234         "call inferior func with struct - returns long"
 235
 236     if ![target_info exists gdb,skip_float_tests] {
 237         gdb_test "p t_structs_f(struct_val1)" "= 2.12.*" \
 238             "call inferior func with struct - returns float"
 239         gdb_test "p t_structs_d(struct_val1)" "= 9.87.*" \
 240             "call inferior func with struct - returns double"
 241     }
 242
 243     if [support_complex_tests] {
 244
 245         gdb_test "p t_structs_fc(struct_val1)" ".*= 3 \\+ 3 \\* I" \
 246             "call inferior func with struct - returns float _Complex"
 247
 248         gdb_test "p t_structs_dc(struct_val1)" ".*= 4 \\+ 4 \\* I" \
 249             "call inferior func with struct - returns double _Complex"
 250
 251         gdb_test "p t_structs_ldc(struct_val1)" "= 5 \\+ 5 \\* I" \
 252             "call inferior func with struct - returns long double _Complex"
 253     }
 254
 255     gdb_test "p t_structs_a(struct_val1)" "= (.unsigned char .. )?<buf.*> \"foo\"" \
 256         "call inferior func with struct - returns char *"
 257
 258     # Restore default value.
 259     gdb_test_no_output "set unwindonsignal off"
 260 }
 261
 262 # Procedure to get current content of all registers.
 263 proc fetch_all_registers {test} {
 264     global gdb_prompt
 265
 266     set all_registers_lines {}
 267     set bad -1
 268     # Former trailing `\[\r\n\]+' may eat just \r leaving \n in the buffer
 269     # corrupting the next matches.
 270     if {[gdb_test_multiple "info all-registers" $test {
 271         -re "info all-registers\r\n" {
 272             exp_continue
 273         }
 274         -ex "The program has no registers now" {
 275             set bad 1
 276             exp_continue
 277         }
 278         -re "^bspstore\[ \t\]+\[^\r\n\]+\r\n" {
 279             if [istarget "ia64-*-*"] {
 280                 # Filter out bspstore which is specially tied to bsp,
 281                 # giving spurious differences.
 282             } else {
 283                 lappend all_registers_lines $expect_out(0,string)
 284             }
 285             exp_continue
 286         }
 287         -re "^last_break\[ \t\]+\[^\r\n\]+\r\n" {
 288             if [istarget "s390*-*-*"] {
 289                 # Filter out last_break which is read-only,
 290                 # giving spurious differences.
 291             } else {
 292                 lappend all_registers_lines $expect_out(0,string)
 293             }
 294             exp_continue
 295         }
 296         -re "^\[^ \t\]+\[ \t\]+\[^\r\n\]+\r\n" {
 297             lappend all_registers_lines $expect_out(0,string)
 298             exp_continue
 299         }
 300         -re "$gdb_prompt $" {
 301             incr bad
 302         }
 303         -re "^\[^\r\n\]+\r\n" {
 304             if {!$bad} {
 305                 warning "Unrecognized output: $expect_out(0,string)"
 306                 set bad 1
 307             }
 308             exp_continue
 309         }
 310     }] != 0} {
 311         return {}
 312     }
 313
 314     if {$bad} {
 315         fail $test
 316         return {}
 317     }
 318
 319     pass $test
 320     return $all_registers_lines
 321 }
 322
 323 proc rerun_and_prepare {} {
 324     global hp_aCC_compiler
 325
 326     if { $hp_aCC_compiler } {
 327         # Do not set language explicitly to 'C'.  This will cause aCC
 328         # tests to fail because promotion rules are different.  Just let
 329         # the language be set to the default.
 330
 331         if { ![runto_main] } {
 332             gdb_suppress_tests;
 333         }
 334
 335         # However, turn off overload-resolution for aCC.  Having it on causes
 336         # a lot of failures.
 337
 338         gdb_test_no_output "set overload-resolution 0"
 339     } else {
 340         if { ![runto_main] } {
 341             gdb_suppress_tests;
 342         }
 343         gdb_test_no_output "set language c"
 344     }
 345
 346     get_debug_format
 347
 348     # Make sure that malloc gets called and that the floating point unit
 349     # is initialized via a call to t_double_values.
 350     gdb_test "next" "t_double_values\\(double_val1, double_val2\\);.*" \
 351         "next to t_double_values"
 352     gdb_test "next" "t_structs_c\\(struct_val1\\);.*" \
 353         "next to t_structs_c"
 354 }
 355
 356
 357 # Start with a fresh gdb.
 358
 359 gdb_exit
 360 gdb_start
 361 gdb_reinitialize_dir $srcdir/$subdir
 362 gdb_load ${binfile}
 363
 364 gdb_test_no_output "set print sevenbit-strings"
 365 gdb_test_no_output "set print address off"
 366 gdb_test_no_output "set width 0"
 367
 368 rerun_and_prepare
 369
 370 # Save all register contents.
 371 set old_reg_content [fetch_all_registers "retrieve original register contents"]
 372
 373 # Perform function calls.
 374 do_function_calls
 375
 376 # Check if all registers still have the same value.
 377 set new_reg_content [fetch_all_registers \
 378                      "register contents after gdb function calls"]
 379 if {$old_reg_content == $new_reg_content} then {
 380     pass "gdb function calls preserve register contents"
 381 } else {
 382     set old_reg_content $new_reg_content
 383     fail "gdb function calls preserve register contents"
 384 }
 385
 386 rerun_and_prepare
 387 # Save all register contents.
 388 set old_reg_content [fetch_all_registers "retrieve original register contents"]
 389
 390 # Set breakpoint at a function we will call from gdb.
 391 gdb_breakpoint add
 392
 393 # Call function (causing a breakpoint hit in the call dummy) and do a continue,
 394 # make sure we are back at main and still have the same register contents.
 395 gdb_test "print add(4,5)" \
 396         "The program being debugged stopped while.*" \
 397         "stop at breakpoint in call dummy function"
 398 gdb_test "continue" "Continuing.*" "continue from call dummy breakpoint"
 399 if ![gdb_test "bt 2" \
 400               "#0  main.*" \
 401               "bt after continuing from call dummy breakpoint"] then {
 402     set new_reg_content [fetch_all_registers \
 403                          "register contents after stop in call dummy"]
 404     if {$old_reg_content == $new_reg_content} then {
 405         pass "continue after stop in call dummy preserves register contents"
 406     } else {
 407         fail "continue after stop in call dummy preserves register contents"
 408     }
 409 }
 410
 411 rerun_and_prepare
 412 # Set breakpoint at a function we will call from gdb.
 413 gdb_breakpoint add
 414 # Save all register contents.
 415 set old_reg_content [fetch_all_registers "retrieve original register contents"]
 416
 417 # Call function (causing a breakpoint hit in the call dummy) and do a finish,
 418 # make sure we are back at main and still have the same register contents.
 419 gdb_test "print add(4,5)" "The program being debugged stopped while.*" \
 420         "call function causing a breakpoint then do a finish"
 421 gdb_test "finish" \
 422          "Value returned is .* = 9" \
 423          "finish from call dummy breakpoint returns correct value"
 424 if ![gdb_test "bt 2" \
 425               "#0  main.*" \
 426               "bt after finishing from call dummy breakpoint"] then {
 427     set new_reg_content [fetch_all_registers \
 428                          "register contents after finish in call dummy"]
 429     if {$old_reg_content == $new_reg_content} then {
 430         pass "finish after stop in call dummy preserves register contents"
 431     } else {
 432         fail "finish after stop in call dummy preserves register contents"
 433     }
 434 }
 435
 436 rerun_and_prepare
 437 # Set breakpoint at a function we will call from gdb.
 438 gdb_breakpoint add
 439 # Save all register contents.
 440 set old_reg_content [fetch_all_registers "retrieve original register contents"]
 441
 442 # Call function (causing a breakpoint hit in the call dummy) and do a return
 443 # with a value, make sure we are back at main with the same register contents.
 444 gdb_test "print add(4,5)" "The program being debugged stopped while.*" \
 445         "call function causing a breakpoint and then do a return"
 446 if ![gdb_test "return 7" \
 447               "#0  main.*" \
 448               "back at main after return from call dummy breakpoint" \
 449               "Make add return now. .y or n.*" \
 450               "y"] then {
 451     set new_reg_content [fetch_all_registers \
 452                          "register contents after return in call dummy"]
 453     if {$old_reg_content == $new_reg_content} then {
 454         pass "return after stop in call dummy preserves register contents"
 455     } else {
 456         fail "return after stop in call dummy preserves register contents"
 457     }
 458 }
 459
 460 rerun_and_prepare
 461 # Set breakpoint at a function we will call from gdb.
 462 gdb_breakpoint add
 463 set old_reg_content [fetch_all_registers "retrieve original register contents"]
 464
 465 # Call function (causing a breakpoint hit in the call dummy), and
 466 # call another function from the call dummy frame (thereby setting up
 467 # several nested call dummy frames).  Test that backtrace and finish
 468 # work when several call dummies are nested.
 469 gdb_breakpoint sum10
 470 gdb_breakpoint t_small_values
 471 gdb_test "print add(2,3)" "The program being debugged stopped while.*" \
 472         "stop at nested call level 1"
 473 gdb_test "backtrace" \
 474         "\#0  add \\(a=2, b=3\\).*\#1  <function called from gdb>.*\#2  main.*" \
 475         "backtrace at nested call level 1"
 476 gdb_test "print add(4,5)" "The program being debugged stopped while.*" \
 477         "stop at nested call level 2"
 478 gdb_test "backtrace" \
 479         "\#0  add \\(a=4, b=5\\).*\#1  <function called from gdb>.*\#2  add \\(a=2, b=3\\).*\#3  <function called from gdb>.*\#4  main.*" \
 480         "backtrace at nested call level 2"
 481 gdb_test "print sum10(2,4,6,8,10,12,14,16,18,20)" \
 482         "The program being debugged stopped while.*" \
 483         "stop at nested call level 3"
 484 gdb_test "backtrace" \
 485         "\#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.*" \
 486         "backtrace at nested call level 3"
 487 gdb_test "print t_small_values(1,3,5,7,9,11,13,15,17,19)" \
 488         "The program being debugged stopped while.*" \
 489         "stop at nested call level 4"
 490 gdb_test "backtrace" \
 491         "\#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.*" \
 492         "backtrace at nested call level 4"
 493 gdb_test "finish" "Value returned is .* = 100" \
 494         "Finish from nested call level 4"
 495 gdb_test "backtrace" \
 496         "\#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.*" \
 497         "backtrace after finish from nested call level 4"
 498 gdb_test "finish" "Value returned is .* = 110" \
 499         "Finish from nested call level 3"
 500 gdb_test "backtrace" \
 501         "\#0  add \\(a=4, b=5\\).*\#1  <function called from gdb>.*\#2  add \\(a=2, b=3\\).*\#3  <function called from gdb>.*\#4  main.*" \
 502         "backtrace after finish from nested call level 3"
 503 gdb_test "finish" "Value returned is .* = 9" \
 504         "Finish from nested call level 2"
 505 gdb_test "backtrace" \
 506         "\#0  add \\(a=2, b=3\\).*\#1  <function called from gdb>.*\#2  main.*" \
 507         "backtrace after finish from nested call level 2"
 508 gdb_test "finish" "Value returned is .* = 5" \
 509         "Finish from nested call level 1"
 510 gdb_test "backtrace" "\#0  main .*" \
 511         "backtrace after finish from nested call level 1"
 512
 513 set new_reg_content [fetch_all_registers \
 514                      "register contents after nested call dummies"]
 515 if {$old_reg_content == $new_reg_content} then {
 516     pass "nested call dummies preserve register contents"
 517 } else {
 518     fail "nested call dummies preserve register contents"
 519 }
 520
 521 # GDB should not crash by internal error on $sp underflow during the inferior
 522 # call.  It is OK it will stop on some: Cannot access memory at address 0x$hex.
 523
 524 if {![target_info exists gdb,nosignals] && ![istarget "*-*-uclinux*"]} {
 525     gdb_test {set $old_sp = $sp}
 526
 527     gdb_test {set $sp = 0}
 528     gdb_test "call doubleit (1)" ".*" "sp == 0: call doubleit (1)"
 529
 530     gdb_test {set $sp = -1}
 531     gdb_test "call doubleit (1)" ".*" "sp == -1: call doubleit (1)"
 532
 533     gdb_test {set $sp = $old_sp}
 534 }
 535
 536 # Test function descriptor resolution - the separate debug info .opd section
 537 # handling vs. local labels `.L'... as `Lcallfunc' starts with `L'.
 538
 539 gdb_test "print callfunc (Lcallfunc, 5)" " = 12"
 540
 541 # Regression test for function pointer cast.
 542 gdb_test "print *((int *(*) (void)) voidfunc)()" " = 23"