gdb/testsuite/gdb.base/callfuncs.exp

   1 # Copyright 1992, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
   2 # 2004, 2007, 2008, 2009, 2010, 2011 Free Software Foundation, Inc.
   3
   4 # This program is free software; you can redistribute it and/or modify
   5 # it under the terms of the GNU General Public License as published by
   6 # the Free Software Foundation; either version 3 of the License, or
   7 # (at your option) any later version.
   8 #
   9 # This program is distributed in the hope that it will be useful,
  10 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 # GNU General Public License for more details.
  13 #
  14 # You should have received a copy of the GNU General Public License
  15 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16
  17 # This file was written by Fred Fish. (fnf@cygnus.com)
  18 # and modified by Bob Manson. (manson@cygnus.com)
  19
  20 if $tracelevel then {
  21         strace $tracelevel
  22 }
  23
  24 set testfile "callfuncs"
  25 set srcfile ${testfile}.c
  26 set binfile ${objdir}/${subdir}/${testfile}
  27
  28 set compile_flags {debug}
  29 if [support_complex_tests] {
  30     lappend compile_flags "additional_flags=-DTEST_COMPLEX"
  31 }
  32
  33 if  { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable $compile_flags] != "" } {
  34      untested callfuncs.exp
  35      return -1
  36 }
  37
  38 # Create and source the file that provides information about the compiler
  39 # used to compile the test case.
  40
  41 if [get_compiler_info ${binfile}] {
  42     return -1;
  43 }
  44
  45 if {$hp_aCC_compiler} {
  46     set prototypes 1
  47 } else {
  48     set prototypes 0
  49 }
  50
  51 # Some targets can't do function calls, so don't even bother with this
  52 # test.
  53 if [target_info exists gdb,cannot_call_functions] {
  54     setup_xfail "*-*-*" 2416
  55     fail "This target can not call functions"
  56     continue
  57 }
  58
  59 # FIXME:  Before calling this proc, we should probably verify that
  60 # we can call inferior functions and get a valid integral value
  61 # returned.
  62 # Note that it is OK to check for 0 or 1 as the returned values, because C
  63 # specifies that the numeric value of a relational or logical expression
  64 # (computed in the inferior) is 1 for true and 0 for false.
  65
  66 proc do_function_calls {} {
  67     global prototypes
  68     global gdb_prompt
  69
  70     # We need to up this because this can be really slow on some boards.
  71     set timeout 60;
  72
  73     gdb_test "p t_char_values(0,0)" " = 0"
  74     gdb_test "p t_char_values('a','b')" " = 1"
  75     gdb_test "p t_char_values(char_val1,char_val2)" " = 1"
  76     gdb_test "p t_char_values('a',char_val2)" " = 1"
  77     gdb_test "p t_char_values(char_val1,'b')" " = 1"
  78
  79     gdb_test "p t_short_values(0,0)" " = 0"
  80     gdb_test "p t_short_values(10,-23)" " = 1"
  81     gdb_test "p t_short_values(short_val1,short_val2)" " = 1"
  82     gdb_test "p t_short_values(10,short_val2)" " = 1"
  83     gdb_test "p t_short_values(short_val1,-23)" " = 1"
  84
  85     gdb_test "p t_int_values(0,0)" " = 0"
  86     gdb_test "p t_int_values(87,-26)" " = 1"
  87     gdb_test "p t_int_values(int_val1,int_val2)" " = 1"
  88     gdb_test "p t_int_values(87,int_val2)" " = 1"
  89     gdb_test "p t_int_values(int_val1,-26)" " = 1"
  90
  91     gdb_test "p t_long_values(0,0)" " = 0"
  92     gdb_test "p t_long_values(789,-321)" " = 1"
  93     gdb_test "p t_long_values(long_val1,long_val2)" " = 1"
  94     gdb_test "p t_long_values(789,long_val2)" " = 1"
  95     gdb_test "p t_long_values(long_val1,-321)" " = 1"
  96
  97     if ![target_info exists gdb,skip_float_tests] {
  98         gdb_test "p t_float_values(0.0,0.0)" " = 0"
  99
 100         # These next four tests fail on the mn10300.
 101         # The first value is passed in regs, the other in memory.
 102         # Gcc emits different stabs for the two parameters; the first is
 103         # claimed to be a float, the second a double.
 104         # dbxout.c in gcc claims this is the desired behavior.
 105         # These tests also fail for RealView, because GDB can not tell that
 106         # the function is unprototyped.
 107         setup_xfail "mn10300-*-*"
 108         if { [test_compiler_info "armcc-*"] } { setup_xfail "*-*-*" }
 109         gdb_test "p t_float_values(3.14159,-2.3765)" " = 1"
 110         setup_xfail "mn10300-*-*"
 111         if { [test_compiler_info "armcc-*"] } { setup_xfail "*-*-*" }
 112         gdb_test "p t_float_values(float_val1,float_val2)" " = 1"
 113         setup_xfail "mn10300-*-*"
 114         if { [test_compiler_info "armcc-*"] } { setup_xfail "*-*-*" }
 115         gdb_test "p t_float_values(3.14159,float_val2)" " = 1"
 116         setup_xfail "mn10300-*-*"
 117         if { [test_compiler_info "armcc-*"] } { setup_xfail "*-*-*" }
 118         gdb_test "p t_float_values(float_val1,-2.3765)" " = 1"
 119
 120         # Test passing of arguments which might not be widened.
 121         gdb_test "p t_float_values2(0.0,0.0)" " = 0"
 122
 123         # Although PR 5318 mentions SunOS specifically, this seems
 124         # to be a generic problem on quite a few platforms.
 125         if $prototypes then {
 126             setup_xfail "sparc-*-*" "mips*-*-*" 5318
 127             if { ! [test_compiler_info gcc-*-*] } then {
 128                 setup_xfail "alpha-dec-osf2*" "i*86-*-sysv4*" 5318
 129             }
 130         }
 131
 132         gdb_test "p t_float_values2(3.14159,float_val2)" " = 1"
 133
 134         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."
 135
 136         gdb_test "p t_small_values(1,2,3,4,5,6,7,8,9,10)" " = 55"
 137
 138         gdb_test "p t_double_values(0.0,0.0)" " = 0"
 139         gdb_test "p t_double_values(45.654,-67.66)" " = 1"
 140         gdb_test "p t_double_values(double_val1,double_val2)" " = 1"
 141         gdb_test "p t_double_values(45.654,double_val2)" " = 1"
 142         gdb_test "p t_double_values(double_val1,-67.66)" " = 1"
 143
 144         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."
 145
 146         gdb_test "p t_double_int(99.0, 1)" " = 0"
 147         gdb_test "p t_double_int(99.0, 99)" " = 1"
 148         gdb_test "p t_int_double(99, 1.0)" " = 0"
 149         gdb_test "p t_int_double(99, 99.0)" " = 1"
 150     }
 151
 152     if [support_complex_tests] {
 153         setup_kfail_for_target gdb/12798 "x86_64-*-*"
 154         gdb_test "p t_float_complex_values(fc1, fc2)" " = 1"
 155         gdb_test "p t_float_complex_values(fc3, fc4)" " = 0"
 156
 157         setup_kfail_for_target gdb/12800 "x86_64-*-*"
 158         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"
 159         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"
 160
 161         setup_kfail_for_target gdb/12798 "x86_64-*-*"
 162         gdb_test "p t_double_complex_values(dc1, dc2)" " = 1"
 163         gdb_test "p t_double_complex_values(dc3, dc4)" " = 0"
 164
 165         setup_kfail_for_target gdb/12800 "x86_64-*-*"
 166         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"
 167         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"
 168
 169         gdb_test "p t_long_double_complex_values(ldc1, ldc2)" " = 1"
 170         gdb_test "p t_long_double_complex_values(ldc3, ldc4)" " = 0"
 171         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"
 172         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"
 173     }
 174
 175     gdb_test "p t_string_values(string_val2,string_val1)" " = 0"
 176     gdb_test "p t_string_values(string_val1,string_val2)" " = 1"
 177     gdb_test "p t_string_values(\"string 1\",\"string 2\")" " = 1"
 178     gdb_test "p t_string_values(\"string 1\",string_val2)" " = 1"
 179     gdb_test "p t_string_values(string_val1,\"string 2\")" " = 1"
 180
 181     gdb_test "p t_char_array_values(char_array_val2,char_array_val1)" " = 0"
 182     gdb_test "p t_char_array_values(char_array_val1,char_array_val2)" " = 1"
 183     gdb_test "p t_char_array_values(\"carray 1\",\"carray 2\")" " = 1"
 184     gdb_test "p t_char_array_values(\"carray 1\",char_array_val2)" " = 1"
 185     gdb_test "p t_char_array_values(char_array_val1,\"carray 2\")" " = 1"
 186
 187     gdb_test "p doubleit(4)" " = 8"
 188     gdb_test "p add(4,5)" " = 9"
 189     gdb_test "p t_func_values(func_val2,func_val1)" " = 0"
 190     gdb_test "p t_func_values(func_val1,func_val2)" " = 1"
 191
 192     gdb_test "p function_struct.func(5)" " = 10"
 193     gdb_test "p function_struct_ptr->func(10)" " = 20"
 194
 195     # GDB currently screws up the passing of function parameters for
 196     # ABIs that use function descriptors.  Instead of passing the
 197     # address of te function descriptor, GDB passes the address of the
 198     # function body.  This results in the called function treating the
 199     # first few instructions of the function proper as a descriptor
 200     # and attempting a jump through that (a totally random address).
 201     setup_kfail gdb/1457 "rs6000*-*-aix*"
 202     setup_kfail gdb/1457 "powerpc*-*-aix*"
 203     setup_kfail gdb/1457 hppa*-*-hpux*
 204     gdb_test "p t_func_values(add,func_val2)" " = 1"
 205     setup_kfail gdb/1457 "rs6000*-*-aix*"
 206     setup_kfail gdb/1457 "powerpc*-*-aix*"
 207     setup_kfail gdb/1457 hppa*-*-hpux*
 208     gdb_test "p t_func_values(func_val1,doubleit)" " = 1"
 209     setup_kfail gdb/1457 "rs6000*-*-aix*"
 210     setup_kfail gdb/1457 "powerpc*-*-aix*"
 211     setup_kfail gdb/1457 hppa*-*-hpux*
 212     gdb_test "p t_call_add(add,3,4)" " = 7"
 213     gdb_test "p t_call_add(func_val1,3,4)" " = 7"
 214
 215     gdb_test "p t_enum_value1(enumval1)" " = 1"
 216     gdb_test "p t_enum_value1(enum_val1)" " = 1"
 217     gdb_test "p t_enum_value1(enum_val2)" " = 0"
 218
 219     gdb_test "p t_enum_value2(enumval2)" " = 1"
 220     gdb_test "p t_enum_value2(enum_val2)" " = 1"
 221     gdb_test "p t_enum_value2(enum_val1)" " = 0"
 222
 223     gdb_test "p sum_args(1,{2})" " = 2"
 224     gdb_test "p sum_args(2,{2,3})" " = 5"
 225     gdb_test "p sum_args(3,{2,3,4})" " = 9"
 226     gdb_test "p sum_args(4,{2,3,4,5})" " = 14"
 227
 228     gdb_test "p sum10 (1, 2, 3, 4, 5, 6, 7, 8, 9, 10)" " = 55"
 229
 230     gdb_test "p cmp10 (0, 1, 2, 3, 4, 5, 6, 7, 8, 9)" " = 1"
 231
 232     gdb_test "p t_structs_c(struct_val1)" "= 120 'x'" \
 233         "call inferior func with struct - returns char"
 234     gdb_test "p t_structs_s(struct_val1)" "= 87" \
 235         "call inferior func with struct - returns short"
 236     gdb_test "p t_structs_i(struct_val1)" "= 76" \
 237         "call inferior func with struct - returns int"
 238     gdb_test "p t_structs_l(struct_val1)" "= 51" \
 239         "call inferior func with struct - returns long"
 240
 241     if ![target_info exists gdb,skip_float_tests] {
 242         gdb_test "p t_structs_f(struct_val1)" "= 2.12.*" \
 243             "call inferior func with struct - returns float"
 244         gdb_test "p t_structs_d(struct_val1)" "= 9.87.*" \
 245             "call inferior func with struct - returns double"
 246     }
 247
 248     if [support_complex_tests] {
 249
 250         setup_kfail_for_target gdb/12796 "x86_64-*-*"
 251         setup_kfail_for_target gdb/12797 "arm*-*-*"
 252         gdb_test "p t_structs_fc(struct_val1)" ".*= 3 \\+ 3 \\* I" \
 253             "call inferior func with struct - returns float _Complex"
 254
 255         setup_kfail_for_target gdb/12783 "i?86-*-*"
 256         setup_kfail_for_target gdb/12796 "x86_64-*-*"
 257         setup_kfail_for_target gdb/12797 "arm*-*-*"
 258         gdb_test "p t_structs_dc(struct_val1)" ".*= 4 \\+ 4 \\* I" \
 259             "call inferior func with struct - returns double _Complex"
 260
 261         setup_kfail_for_target gdb/12783 "i?86-*-*"
 262         setup_kfail_for_target gdb/12796 "x86_64-*-*"
 263         setup_kfail_for_target gdb/12797 "arm*-*-*"
 264         gdb_test "p t_structs_ldc(struct_val1)" "= 5 \\+ 5 \\* I" \
 265             "call inferior func with struct - returns long double _Complex"
 266     }
 267
 268     gdb_test "p t_structs_a(struct_val1)" "= (.unsigned char .. )?\"foo\"" \
 269         "call inferior func with struct - returns char *"
 270 }
 271
 272 # Procedure to get current content of all registers.
 273 proc fetch_all_registers {test} {
 274     global gdb_prompt
 275
 276     set all_registers_lines {}
 277     set bad -1
 278     # Former trailing `\[\r\n\]+' may eat just \r leaving \n in the buffer
 279     # corrupting the next matches.
 280     if {[gdb_test_multiple "info all-registers" $test {
 281         -re "info all-registers\r\n" {
 282             exp_continue
 283         }
 284         -ex "The program has no registers now" {
 285             set bad 1
 286             exp_continue
 287         }
 288         -re "^bspstore\[ \t\]+\[^\r\n\]+\r\n" {
 289             if [istarget "ia64-*-*"] {
 290                 # Filter out bspstore which is specially tied to bsp,
 291                 # giving spurious differences.
 292             } else {
 293                 lappend all_registers_lines $expect_out(0,string)
 294             }
 295             exp_continue
 296         }
 297         -re "^last_break\[ \t\]+\[^\r\n\]+\r\n" {
 298             if [istarget "s390*-*-*"] {
 299                 # Filter out last_break which is read-only,
 300                 # giving spurious differences.
 301             } else {
 302                 lappend all_registers_lines $expect_out(0,string)
 303             }
 304             exp_continue
 305         }
 306         -re "^\[^ \t\]+\[ \t\]+\[^\r\n\]+\r\n" {
 307             lappend all_registers_lines $expect_out(0,string)
 308             exp_continue
 309         }
 310         -re "$gdb_prompt $" {
 311             incr bad
 312         }
 313         -re "^\[^\r\n\]+\r\n" {
 314             if {!$bad} {
 315                 warning "Unrecognized output: $expect_out(0,string)"
 316                 set bad 1
 317             }
 318             exp_continue
 319         }
 320     }] != 0} {
 321         return {}
 322     }
 323
 324     if {$bad} {
 325         fail $test
 326         return {}
 327     }
 328
 329     pass $test
 330     return $all_registers_lines
 331 }
 332
 333 proc rerun_and_prepare {} {
 334     global hp_aCC_compiler
 335
 336     if { $hp_aCC_compiler } {
 337         # Do not set language explicitly to 'C'.  This will cause aCC
 338         # tests to fail because promotion rules are different.  Just let
 339         # the language be set to the default.
 340
 341         if { ![runto_main] } {
 342             gdb_suppress_tests;
 343         }
 344
 345         # However, turn off overload-resolution for aCC.  Having it on causes
 346         # a lot of failures.
 347
 348         gdb_test_no_output "set overload-resolution 0"
 349     } else {
 350         if { ![runto_main] } {
 351             gdb_suppress_tests;
 352         }
 353         gdb_test_no_output "set language c"
 354     }
 355
 356     get_debug_format
 357
 358     # Make sure that malloc gets called and that the floating point unit
 359     # is initialized via a call to t_double_values.
 360     gdb_test "next" "t_double_values\\(double_val1, double_val2\\);.*" \
 361         "next to t_double_values"
 362     gdb_test "next" "t_structs_c\\(struct_val1\\);.*" \
 363         "next to t_structs_c"
 364 }
 365
 366
 367 # Start with a fresh gdb.
 368
 369 gdb_exit
 370 gdb_start
 371 gdb_reinitialize_dir $srcdir/$subdir
 372 gdb_load ${binfile}
 373
 374 gdb_test_no_output "set print sevenbit-strings"
 375 gdb_test_no_output "set print address off"
 376 gdb_test_no_output "set width 0"
 377
 378 rerun_and_prepare
 379
 380 # Save all register contents.
 381 set old_reg_content [fetch_all_registers "retrieve original register contents"]
 382
 383 # Perform function calls.
 384 do_function_calls
 385
 386 # Check if all registers still have the same value.
 387 set new_reg_content [fetch_all_registers \
 388                      "register contents after gdb function calls"]
 389 if {$old_reg_content == $new_reg_content} then {
 390     pass "gdb function calls preserve register contents"
 391 } else {
 392     set old_reg_content $new_reg_content
 393     fail "gdb function calls preserve register contents"
 394 }
 395
 396 rerun_and_prepare
 397 # Save all register contents.
 398 set old_reg_content [fetch_all_registers "retrieve original register contents"]
 399
 400 # Set breakpoint at a function we will call from gdb.
 401 gdb_breakpoint add
 402
 403 # Call function (causing a breakpoint hit in the call dummy) and do a continue,
 404 # make sure we are back at main and still have the same register contents.
 405 gdb_test "print add(4,5)" \
 406         "The program being debugged stopped while.*" \
 407         "stop at breakpoint in call dummy function"
 408 gdb_test "continue" "Continuing.*" "continue from call dummy breakpoint"
 409 if ![gdb_test "bt 2" \
 410               "#0  main.*" \
 411               "bt after continuing from call dummy breakpoint"] then {
 412     set new_reg_content [fetch_all_registers \
 413                          "register contents after stop in call dummy"]
 414     if {$old_reg_content == $new_reg_content} then {
 415         pass "continue after stop in call dummy preserves register contents"
 416     } else {
 417         fail "continue after stop in call dummy preserves register contents"
 418     }
 419 }
 420
 421 rerun_and_prepare
 422 # Set breakpoint at a function we will call from gdb.
 423 gdb_breakpoint add
 424 # Save all register contents.
 425 set old_reg_content [fetch_all_registers "retrieve original register contents"]
 426
 427 # Call function (causing a breakpoint hit in the call dummy) and do a finish,
 428 # make sure we are back at main and still have the same register contents.
 429 gdb_test "print add(4,5)" "The program being debugged stopped while.*" \
 430         "call function causing a breakpoint then do a finish"
 431 gdb_test "finish" \
 432          "Value returned is .* = 9" \
 433          "finish from call dummy breakpoint returns correct value"
 434 if ![gdb_test "bt 2" \
 435               "#0  main.*" \
 436               "bt after finishing from call dummy breakpoint"] then {
 437     set new_reg_content [fetch_all_registers \
 438                          "register contents after finish in call dummy"]
 439     if {$old_reg_content == $new_reg_content} then {
 440         pass "finish after stop in call dummy preserves register contents"
 441     } else {
 442         fail "finish after stop in call dummy preserves register contents"
 443     }
 444 }
 445
 446 rerun_and_prepare
 447 # Set breakpoint at a function we will call from gdb.
 448 gdb_breakpoint add
 449 # Save all register contents.
 450 set old_reg_content [fetch_all_registers "retrieve original register contents"]
 451
 452 # Call function (causing a breakpoint hit in the call dummy) and do a return
 453 # with a value, make sure we are back at main with the same register contents.
 454 gdb_test "print add(4,5)" "The program being debugged stopped while.*" \
 455         "call function causing a breakpoint and then do a return"
 456 if ![gdb_test "return 7" \
 457               "#0  main.*" \
 458               "back at main after return from call dummy breakpoint" \
 459               "Make add return now. .y or n.*" \
 460               "y"] then {
 461     set new_reg_content [fetch_all_registers \
 462                          "register contents after return in call dummy"]
 463     if {$old_reg_content == $new_reg_content} then {
 464         pass "return after stop in call dummy preserves register contents"
 465     } else {
 466         fail "return after stop in call dummy preserves register contents"
 467     }
 468 }
 469
 470 rerun_and_prepare
 471 # Set breakpoint at a function we will call from gdb.
 472 gdb_breakpoint add
 473 set old_reg_content [fetch_all_registers "retrieve original register contents"]
 474
 475 # Call function (causing a breakpoint hit in the call dummy), and
 476 # call another function from the call dummy frame (thereby setting up
 477 # several nested call dummy frames).  Test that backtrace and finish
 478 # work when several call dummies are nested.
 479 gdb_breakpoint sum10
 480 gdb_breakpoint t_small_values
 481 gdb_test "print add(2,3)" "The program being debugged stopped while.*" \
 482         "stop at nested call level 1"
 483 gdb_test "backtrace" \
 484         "\#0  add \\(a=2, b=3\\).*\#1  <function called from gdb>.*\#2  main.*" \
 485         "backtrace at nested call level 1"
 486 gdb_test "print add(4,5)" "The program being debugged stopped while.*" \
 487         "stop at nested call level 2"
 488 gdb_test "backtrace" \
 489         "\#0  add \\(a=4, b=5\\).*\#1  <function called from gdb>.*\#2  add \\(a=2, b=3\\).*\#3  <function called from gdb>.*\#4  main.*" \
 490         "backtrace at nested call level 2"
 491 gdb_test "print sum10(2,4,6,8,10,12,14,16,18,20)" \
 492         "The program being debugged stopped while.*" \
 493         "stop at nested call level 3"
 494 gdb_test "backtrace" \
 495         "\#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.*" \
 496         "backtrace at nested call level 3"
 497 gdb_test "print t_small_values(1,3,5,7,9,11,13,15,17,19)" \
 498         "The program being debugged stopped while.*" \
 499         "stop at nested call level 4"
 500 gdb_test "backtrace" \
 501         "\#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.*" \
 502         "backtrace at nested call level 4"
 503 gdb_test "finish" "Value returned is .* = 100" \
 504         "Finish from nested call level 4"
 505 gdb_test "backtrace" \
 506         "\#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.*" \
 507         "backtrace after finish from nested call level 4"
 508 gdb_test "finish" "Value returned is .* = 110" \
 509         "Finish from nested call level 3"
 510 gdb_test "backtrace" \
 511         "\#0  add \\(a=4, b=5\\).*\#1  <function called from gdb>.*\#2  add \\(a=2, b=3\\).*\#3  <function called from gdb>.*\#4  main.*" \
 512         "backtrace after finish from nested call level 3"
 513 gdb_test "finish" "Value returned is .* = 9" \
 514         "Finish from nested call level 2"
 515 gdb_test "backtrace" \
 516         "\#0  add \\(a=2, b=3\\).*\#1  <function called from gdb>.*\#2  main.*" \
 517         "backtrace after finish from nested call level 2"
 518 gdb_test "finish" "Value returned is .* = 5" \
 519         "Finish from nested call level 1"
 520 gdb_test "backtrace" "\#0  main .*" \
 521         "backtrace after finish from nested call level 1"
 522
 523 set new_reg_content [fetch_all_registers \
 524                      "register contents after nested call dummies"]
 525 if {$old_reg_content == $new_reg_content} then {
 526     pass "nested call dummies preserve register contents"
 527 } else {
 528     fail "nested call dummies preserve register contents"
 529 }
 530
 531 # GDB should not crash by internal error on $sp underflow during the inferior
 532 # call.  It is OK it will stop on some: Cannot access memory at address 0x$hex.
 533
 534 if {![target_info exists gdb,nosignals] && ![istarget "*-*-uclinux*"]} {
 535     gdb_test {set $old_sp = $sp}
 536
 537     gdb_test {set $sp = 0}
 538     gdb_test "call doubleit (1)" ".*" "sp == 0: call doubleit (1)"
 539
 540     gdb_test {set $sp = -1}
 541     gdb_test "call doubleit (1)" ".*" "sp == -1: call doubleit (1)"
 542
 543     gdb_test {set $sp = $old_sp}
 544 }
 545
 546 # Test function descriptor resolution - the separate debug info .opd section
 547 # handling vs. local labels `.L'... as `Lcallfunc' starts with `L'.
 548
 549 gdb_test "print callfunc (Lcallfunc, 5)" " = 12"