# Copyright 1992-2022 Free Software Foundation, Inc. # This program is free software; you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by # the Free Software Foundation; either version 3 of the License, or # (at your option) any later version. # # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU General Public License for more details. # # You should have received a copy of the GNU General Public License # along with this program. If not, see . # This file was written by Fred Fish. (fnf@cygnus.com) # and modified by Bob Manson. (manson@cygnus.com) standard_testfile # We still want to test non-prototype functions for now, which is why # we disable compilers warning about them. set compile_flags {debug additional_flags=-Wno-deprecated-non-prototype} if [support_complex_tests] { lappend compile_flags "additional_flags=-DTEST_COMPLEX" } # Some targets can't do function calls, so don't even bother with this # test. if [target_info exists gdb,cannot_call_functions] { unsupported "this target can not call functions" return } set skip_float_test [gdb_skip_float_test] # FIXME: Before calling this proc, we should probably verify that # we can call inferior functions and get a valid integral value # returned. # Note that it is OK to check for 0 or 1 as the returned values, because C # specifies that the numeric value of a relational or logical expression # (computed in the inferior) is 1 for true and 0 for false. proc do_function_calls {prototypes} { global gdb_prompt skip_float_test # We need to up this because this can be really slow on some boards. set timeout 60 # If any of these calls segv we don't want to affect subsequent tests. # E.g., we want to ensure register values are restored. gdb_test_no_output "set unwindonsignal on" gdb_test "p t_char_values(0,0)" " = 0" gdb_test "p t_char_values('a','b')" " = 1" gdb_test "p t_char_values(char_val1,char_val2)" " = 1" gdb_test "p t_char_values('a',char_val2)" " = 1" gdb_test "p t_char_values(char_val1,'b')" " = 1" gdb_test "p t_short_values(0,0)" " = 0" gdb_test "p t_short_values(10,-23)" " = 1" gdb_test "p t_short_values(short_val1,short_val2)" " = 1" gdb_test "p t_short_values(10,short_val2)" " = 1" gdb_test "p t_short_values(short_val1,-23)" " = 1" gdb_test "p t_int_values(0,0)" " = 0" gdb_test "p t_int_values(87,-26)" " = 1" gdb_test "p t_int_values(int_val1,int_val2)" " = 1" gdb_test "p t_int_values(87,int_val2)" " = 1" gdb_test "p t_int_values(int_val1,-26)" " = 1" gdb_test "p t_long_values(0,0)" " = 0" gdb_test "p t_long_values(789,-321)" " = 1" gdb_test "p t_long_values(long_val1,long_val2)" " = 1" gdb_test "p t_long_values(789,long_val2)" " = 1" gdb_test "p t_long_values(long_val1,-321)" " = 1" if {!$skip_float_test} { gdb_test "p t_float_values(0.0,0.0)" " = 0" # These next four tests fail on the mn10300. # The first value is passed in regs, the other in memory. # Gcc emits different stabs for the two parameters; the first is # claimed to be a float, the second a double. # dbxout.c in gcc claims this is the desired behavior. # These tests also fail for RealView, because GDB can not tell that # the function is unprototyped. setup_xfail "mn10300-*-*" if { [test_compiler_info "armcc-*"] } { setup_xfail "*-*-*" } gdb_test "p t_float_values(3.14159,-2.3765)" " = 1" setup_xfail "mn10300-*-*" if { [test_compiler_info "armcc-*"] } { setup_xfail "*-*-*" } gdb_test "p t_float_values(float_val1,float_val2)" " = 1" setup_xfail "mn10300-*-*" if { [test_compiler_info "armcc-*"] } { setup_xfail "*-*-*" } gdb_test "p t_float_values(3.14159,float_val2)" " = 1" setup_xfail "mn10300-*-*" if { [test_compiler_info "armcc-*"] } { setup_xfail "*-*-*" } gdb_test "p t_float_values(float_val1,-2.3765)" " = 1" # Same, via unprototyped function pointer (t_float_values is # always unprototyped). gdb_test "p ((int (*) ()) t_float_values)(float_val1,-2.3765)" " = 1" # Test passing of arguments which might not be widened. gdb_test "p t_float_values2(0.0,0.0)" " = 0" # Same, via function pointer. if {$prototypes} { gdb_test "p ((int (*) (float, float)) t_float_values2)(0.0,0.0)" " = 0" } else { gdb_test "p ((int (*) ()) t_float_values2)(0.0,0.0)" " = 0" } gdb_test "p t_float_values2(3.14159,float_val2)" " = 1" if {$prototypes} { gdb_test "p ((int (*) (float, float)) t_float_values2)(3.14159,float_val2)" " = 1" } else { gdb_test "p ((int (*) ()) t_float_values2)(3.14159,float_val2)" " = 1" } 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." gdb_test "p t_small_values(1,2,3,4,5,6,7,8,9,10)" " = 55" gdb_test "p t_double_values(0.0,0.0)" " = 0" gdb_test "p t_double_values(45.654,-67.66)" " = 1" gdb_test "p t_double_values(double_val1,double_val2)" " = 1" gdb_test "p t_double_values(45.654,double_val2)" " = 1" gdb_test "p t_double_values(double_val1,-67.66)" " = 1" 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." gdb_test "p t_double_int(99.0, 1)" " = 0" gdb_test "p t_double_int(99.0, 99)" " = 1" gdb_test "p t_int_double(99, 1.0)" " = 0" gdb_test "p t_int_double(99, 99.0)" " = 1" } if [support_complex_tests] { gdb_test "p t_float_complex_values(fc1, fc2)" " = 1" gdb_test "p t_float_complex_values(fc3, fc4)" " = 0" 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" 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" gdb_test "p t_double_complex_values(dc1, dc2)" " = 1" gdb_test "p t_double_complex_values(dc3, dc4)" " = 0" 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" 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" gdb_test "p t_long_double_complex_values(ldc1, ldc2)" " = 1" gdb_test "p t_long_double_complex_values(ldc3, ldc4)" " = 0" 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" 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" } gdb_test "p t_string_values(string_val2,string_val1)" " = 0" gdb_test "p t_string_values(string_val1,string_val2)" " = 1" gdb_test "p t_string_values(\"string 1\",\"string 2\")" " = 1" gdb_test "p t_string_values(\"string 1\",string_val2)" " = 1" gdb_test "p t_string_values(string_val1,\"string 2\")" " = 1" gdb_test "p t_char_array_values(char_array_val2,char_array_val1)" " = 0" gdb_test "p t_char_array_values(char_array_val1,char_array_val2)" " = 1" gdb_test "p t_char_array_values(\"carray 1\",\"carray 2\")" " = 1" gdb_test "p t_char_array_values(\"carray 1\",char_array_val2)" " = 1" gdb_test "p t_char_array_values(char_array_val1,\"carray 2\")" " = 1" gdb_test "p doubleit(4)" " = 8" gdb_test "p add(4,5)" " = 9" gdb_test "p t_func_values(func_val2,func_val1)" " = 0" gdb_test "p t_func_values(func_val1,func_val2)" " = 1" gdb_test "p function_struct.func(5)" " = 10" gdb_test "p function_struct_ptr->func(10)" " = 20" # GDB currently screws up the passing of function parameters for # ABIs that use function descriptors. Instead of passing the # address of te function descriptor, GDB passes the address of the # function body. This results in the called function treating the # first few instructions of the function proper as a descriptor # and attempting a jump through that (a totally random address). setup_kfail gdb/1457 "rs6000*-*-aix*" setup_kfail gdb/1457 "powerpc*-*-aix*" gdb_test "p t_func_values(add,func_val2)" " = 1" setup_kfail gdb/1457 "rs6000*-*-aix*" setup_kfail gdb/1457 "powerpc*-*-aix*" gdb_test "p t_func_values(func_val1,doubleit)" " = 1" setup_kfail gdb/1457 "rs6000*-*-aix*" setup_kfail gdb/1457 "powerpc*-*-aix*" gdb_test "p t_call_add(add,3,4)" " = 7" gdb_test "p t_call_add(func_val1,3,4)" " = 7" gdb_test "p t_enum_value1(enumval1)" " = 1" gdb_test "p t_enum_value1(enum_val1)" " = 1" gdb_test "p t_enum_value1(enum_val2)" " = 0" gdb_test "p t_enum_value2(enumval2)" " = 1" gdb_test "p t_enum_value2(enum_val2)" " = 1" gdb_test "p t_enum_value2(enum_val1)" " = 0" gdb_test "p sum_args(1,{2})" " = 2" gdb_test "p sum_args(2,{2,3})" " = 5" gdb_test "p sum_args(3,{2,3,4})" " = 9" gdb_test "p sum_args(4,{2,3,4,5})" " = 14" gdb_test "p sum10 (1, 2, 3, 4, 5, 6, 7, 8, 9, 10)" " = 55" gdb_test "p cmp10 (0, 1, 2, 3, 4, 5, 6, 7, 8, 9)" " = 1" gdb_test "p t_structs_c(struct_val1)" "= 120 'x'" \ "call inferior func with struct - returns char" gdb_test "p t_structs_s(struct_val1)" "= 87" \ "call inferior func with struct - returns short" gdb_test "p t_structs_i(struct_val1)" "= 76" \ "call inferior func with struct - returns int" gdb_test "p t_structs_l(struct_val1)" "= 51" \ "call inferior func with struct - returns long" if {!$skip_float_test} { gdb_test "p t_structs_f(struct_val1)" "= 2.12.*" \ "call inferior func with struct - returns float" gdb_test "p t_structs_d(struct_val1)" "= 9.87.*" \ "call inferior func with struct - returns double" } if [support_complex_tests] { gdb_test "p t_structs_fc(struct_val1)" ".*= 3 \\+ 3i" \ "call inferior func with struct - returns float _Complex" gdb_test "p t_structs_dc(struct_val1)" ".*= 4 \\+ 4i" \ "call inferior func with struct - returns double _Complex" gdb_test "p t_structs_ldc(struct_val1)" "= 5 \\+ 5i" \ "call inferior func with struct - returns long double _Complex" } gdb_test "p t_structs_a(struct_val1)" "= (.unsigned char .. )?<.*buf.*> \"foo\"" \ "call inferior func with struct - returns char *" # Restore default value. gdb_test_no_output "set unwindonsignal off" } # Procedure to get current content of all registers. proc fetch_all_registers {test} { global gdb_prompt set all_registers_lines {} set bad -1 # Former trailing `\[\r\n\]+' may eat just \r leaving \n in the buffer # corrupting the next matches. if {[gdb_test_multiple "info all-registers" $test { -re "info all-registers\r\n" { exp_continue } -ex "The program has no registers now" { set bad 1 exp_continue } -re "^bspstore\[ \t\]+\[^\r\n\]+\r\n" { if [istarget "ia64-*-*"] { # Filter out bspstore which is specially tied to bsp, # giving spurious differences. } else { lappend all_registers_lines $expect_out(0,string) } exp_continue } -re "^pstate\[ \t\]+\[^\r\n\]+\r\n" { if [istarget "sparc64-*-linux-gnu"] { # Filter out the pstate register, since in sparc64 # targets the Linux kernel disables pstate.PEF when # returning from traps, giving spurious differences. } else { lappend all_registers_lines $expect_out(0,string) } exp_continue } -re "^last_break\[ \t\]+\[^\r\n\]+\r\n" { if [istarget "s390*-*-*"] { # Filter out last_break which is read-only, # giving spurious differences. } else { lappend all_registers_lines $expect_out(0,string) } exp_continue } -re "^\(?:cycle\|instret\)\[ \t\]+\[^\r\n\]+\r\n" { if [istarget "riscv*-*-*"] { # Filter out the cycle counter and instructions # retired counter CSRs which are read-only, giving # spurious differences. } else { lappend all_registers_lines $expect_out(0,string) } exp_continue } -re "^\[^ \t\]+\[ \t\]+\[^\r\n\]+\r\n" { lappend all_registers_lines $expect_out(0,string) exp_continue } -re "$gdb_prompt $" { incr bad } -re "^\[^\r\n\]+\r\n" { if {!$bad} { warning "Unrecognized output: $expect_out(0,string)" set bad 1 } exp_continue } }] != 0} { return {} } if {$bad} { fail $test return {} } pass $test return $all_registers_lines } # Global used by RERUN_AND_PREPARE to make test names unique. set rerun_count 0 proc rerun_and_prepare {} { global rerun_count incr rerun_count with_test_prefix "rerun number ${rerun_count}" { if { ![runto_main] } { return } gdb_test_no_output "set language c" get_debug_format # Make sure that malloc gets called and that the floating # point unit is initialized via a call to t_double_values. gdb_test "next" \ "t_double_values\\(double_val1, double_val2\\);.*" \ "next to t_double_values" gdb_test "next" "t_structs_c\\(struct_val1\\);.*" \ "next to t_structs_c" } } proc perform_all_tests {prototypes} { gdb_test_no_output "set print sevenbit-strings" gdb_test_no_output "set print address off" gdb_test_no_output "set width 0" rerun_and_prepare # Save all register contents. set old_reg_content \ [fetch_all_registers "retrieve original register contents 1"] # Perform function calls. do_function_calls $prototypes # Check if all registers still have the same value. set new_reg_content [fetch_all_registers \ "register contents after gdb function calls"] if {$old_reg_content == $new_reg_content} { pass "gdb function calls preserve register contents" } else { set old_reg_content $new_reg_content fail "gdb function calls preserve register contents" } rerun_and_prepare # Save all register contents. set old_reg_content \ [fetch_all_registers "retrieve original register contents 2"] # Set breakpoint at a function we will call from gdb. gdb_breakpoint add # Call function (causing a breakpoint hit in the call dummy) and do a continue, # make sure we are back at main and still have the same register contents. gdb_test "print add(4,5)" \ "The program being debugged stopped while.*" \ "stop at breakpoint in call dummy function" gdb_test "continue" "Continuing.*" "continue from call dummy breakpoint" if ![gdb_test "bt 2" \ "#0 main.*" \ "bt after continuing from call dummy breakpoint"] then { set new_reg_content [fetch_all_registers \ "register contents after stop in call dummy"] if {$old_reg_content == $new_reg_content} { pass "continue after stop in call dummy preserves register contents" } else { fail "continue after stop in call dummy preserves register contents" } } rerun_and_prepare # Set breakpoint at a function we will call from gdb. gdb_breakpoint add # Save all register contents. set old_reg_content \ [fetch_all_registers "retrieve original register contents 3"] # Call function (causing a breakpoint hit in the call dummy) and do a finish, # make sure we are back at main and still have the same register contents. gdb_test "print add(4,5)" "The program being debugged stopped while.*" \ "call function causing a breakpoint then do a finish" gdb_test "finish" \ "Value returned is .* = 9" \ "finish from call dummy breakpoint returns correct value" if ![gdb_test "bt 2" \ "#0 main.*" \ "bt after finishing from call dummy breakpoint"] then { set new_reg_content [fetch_all_registers \ "register contents after finish in call dummy"] if {$old_reg_content == $new_reg_content} { pass "finish after stop in call dummy preserves register contents" } else { fail "finish after stop in call dummy preserves register contents" } } rerun_and_prepare # Set breakpoint at a function we will call from gdb. gdb_breakpoint add # Save all register contents. set old_reg_content \ [fetch_all_registers "retrieve original register contents 4"] # Call function (causing a breakpoint hit in the call dummy) and do a return # with a value, make sure we are back at main with the same register contents. gdb_test "print add(4,5)" "The program being debugged stopped while.*" \ "call function causing a breakpoint and then do a return" if ![gdb_test "return 7" \ "#0 main.*" \ "back at main after return from call dummy breakpoint" \ "Make add return now. .y or n.*" \ "y"] then { set new_reg_content [fetch_all_registers \ "register contents after return in call dummy"] if {$old_reg_content == $new_reg_content} { pass "return after stop in call dummy preserves register contents" } else { fail "return after stop in call dummy preserves register contents" } } rerun_and_prepare # Set breakpoint at a function we will call from gdb. gdb_breakpoint add set old_reg_content \ [fetch_all_registers "retrieve original register contents 5"] # Call function (causing a breakpoint hit in the call dummy), and # call another function from the call dummy frame (thereby setting up # several nested call dummy frames). Test that backtrace and finish # work when several call dummies are nested. gdb_breakpoint sum10 gdb_breakpoint t_small_values gdb_test "print add(2,3)" "The program being debugged stopped while.*" \ "stop at nested call level 1" gdb_test "backtrace" \ "\#0 add \\(a=2, b=3\\).*\#1 .*\#2 main.*" \ "backtrace at nested call level 1" gdb_test "print add(4,5)" "The program being debugged stopped while.*" \ "stop at nested call level 2" gdb_test "backtrace" \ "\#0 add \\(a=4, b=5\\).*\#1 .*\#2 add \\(a=2, b=3\\).*\#3 .*\#4 main.*" \ "backtrace at nested call level 2" gdb_test "print sum10(2,4,6,8,10,12,14,16,18,20)" \ "The program being debugged stopped while.*" \ "stop at nested call level 3" gdb_test "backtrace" \ "\#0 sum10 \\(i0=2, i1=4, i2=6, i3=8, i4=10, i5=12, i6=14, i7=16, i8=18, i9=20\\).*\#1 .*\#2 add \\(a=4, b=5\\).*\#3 .*\#4 add \\(a=2, b=3\\).*\#5 .*\#6 main.*" \ "backtrace at nested call level 3" gdb_test "print t_small_values(1,3,5,7,9,11,13,15,17,19)" \ "The program being debugged stopped while.*" \ "stop at nested call level 4" gdb_test "backtrace" \ "\#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 .*\#4 add \\(a=4, b=5\\).*\#5 .*\#6 add \\(a=2, b=3\\).*\#7 .*\#8 main.*" \ "backtrace at nested call level 4" gdb_test "finish" "Value returned is .* = 100" \ "Finish from nested call level 4" gdb_test "backtrace" \ "\#0 sum10 \\(i0=2, i1=4, i2=6, i3=8, i4=10, i5=12, i6=14, i7=16, i8=18, i9=20\\).*\#1 .*\#2 add \\(a=4, b=5\\).*\#3 .*\#4 add \\(a=2, b=3\\).*\#5 .*\#6 main.*" \ "backtrace after finish from nested call level 4" gdb_test "finish" "Value returned is .* = 110" \ "Finish from nested call level 3" gdb_test "backtrace" \ "\#0 add \\(a=4, b=5\\).*\#1 .*\#2 add \\(a=2, b=3\\).*\#3 .*\#4 main.*" \ "backtrace after finish from nested call level 3" gdb_test "finish" "Value returned is .* = 9" \ "Finish from nested call level 2" gdb_test "backtrace" \ "\#0 add \\(a=2, b=3\\).*\#1 .*\#2 main.*" \ "backtrace after finish from nested call level 2" gdb_test "finish" "Value returned is .* = 5" \ "Finish from nested call level 1" gdb_test "backtrace" "\#0 main .*" \ "backtrace after finish from nested call level 1" set new_reg_content [fetch_all_registers \ "register contents after nested call dummies"] if {$old_reg_content == $new_reg_content} { pass "nested call dummies preserve register contents" } else { fail "nested call dummies preserve register contents" } # GDB should not crash by internal error on $sp underflow during the inferior # call. It is OK it will stop on some: Cannot access memory at address 0x$hex. if {![target_info exists gdb,nosignals] && ![istarget "*-*-uclinux*"]} { gdb_test {set $old_sp = $sp} gdb_test {set $sp = 0} gdb_test "call doubleit (1)" ".*" "sp == 0: call doubleit (1)" gdb_test {set $sp = -1} gdb_test "call doubleit (1)" ".*" "sp == -1: call doubleit (1)" gdb_test {set $sp = $old_sp} } # Test function descriptor resolution - the separate debug info .opd section # handling vs. local labels `.L'... as `Lcallfunc' starts with `L'. gdb_test "print callfunc (Lcallfunc, 5)" " = 12" # Regression test for function pointer cast. gdb_test "print *((int *(*) (void)) voidfunc)()" " = 23" } # Perform all tests with and without function prototypes. if { ![prepare_for_testing "failed to prepare" $testfile $srcfile "$compile_flags additional_flags=-DPROTOTYPES"] } { perform_all_tests 1 } if { ![prepare_for_testing "failed to prepare" $testfile $srcfile "$compile_flags additional_flags=-DNO_PROTOTYPES"] } { with_test_prefix "noproto" { perform_all_tests 0 } }