diff options
Diffstat (limited to 'gdb/testsuite')
| -rw-r--r-- | gdb/testsuite/ChangeLog | 5 | ||||
| -rw-r--r-- | gdb/testsuite/gdb.dwarf2/void-type.c | 36 | ||||
| -rw-r--r-- | gdb/testsuite/gdb.dwarf2/void-type.exp | 125 |
3 files changed, 166 insertions, 0 deletions
diff --git a/gdb/testsuite/ChangeLog b/gdb/testsuite/ChangeLog index cf0da02..8fa6b0d 100644 --- a/gdb/testsuite/ChangeLog +++ b/gdb/testsuite/ChangeLog @@ -1,3 +1,8 @@ +2018-10-31 Andrew Burgess <andrew.burgess@embecosm.com> + + * gdb.dwarf2/void-type.c: New file. + * gdb.dwarf2/void-type.exp: New file. + 2018-10-27 Philippe Waroquiers <philippe.waroquiers@skynet.be> * gdb.base/info_qt.c: New file. diff --git a/gdb/testsuite/gdb.dwarf2/void-type.c b/gdb/testsuite/gdb.dwarf2/void-type.c new file mode 100644 index 0000000..8a88dc2 --- /dev/null +++ b/gdb/testsuite/gdb.dwarf2/void-type.c @@ -0,0 +1,36 @@ +/* Copyright (C) 2018 Free Software Foundation, Inc. + + This file is part of GDB. + + 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 <http://www.gnu.org/licenses/>. */ + +int var_a = 5; + +void *var_ptr = &var_a; + +__attribute__((noinline)) void +func () +{ + asm ("func_label: .globl func_label"); + asm ("" ::: "memory"); + return; +} + +int +main () +{ + asm ("main_label: .globl main_label"); + func (); + return 0; +} diff --git a/gdb/testsuite/gdb.dwarf2/void-type.exp b/gdb/testsuite/gdb.dwarf2/void-type.exp new file mode 100644 index 0000000..3691bff --- /dev/null +++ b/gdb/testsuite/gdb.dwarf2/void-type.exp @@ -0,0 +1,125 @@ +# Copyright 2018 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 <http://www.gnu.org/licenses/>. + +# This tests some non-standard DWARF spotted in an Intel C Compiler +# generated binary. +# +# The DWARF standard (V5 3.3.2) says that a void C function should not +# have a DW_AT_type attribute, however, an ICC compiled binary was +# found to have a DW_AT_type that referenced a signed integer type, of +# size 0, with the name 'void'. +# +# This 'void' integer type would cause GDB to crash in some cases, one +# that was seen was when using 'finish' to leave the void function. + +load_lib dwarf.exp + +# This test can only be run on targets which support DWARF-2 and use gas. +if {![dwarf2_support]} { + return 0 +} + +standard_testfile void-type.c void-type.S + +# Make some DWARF for the test. +set asm_file [standard_output_file $srcfile2] +Dwarf::assemble $asm_file { + global srcdir subdir srcfile + + set func_result [function_range func ${srcdir}/${subdir}/${srcfile}] + set func_start [lindex $func_result 0] + set func_length [lindex $func_result 1] + + set main_result [function_range main ${srcdir}/${subdir}/${srcfile}] + set main_start [lindex $main_result 0] + set main_length [lindex $main_result 1] + + cu {} { + DW_TAG_compile_unit { + {DW_AT_producer "Intel(R) C Intel(R) 64 Compiler XE for applications running on Intel(R) 64, Version 14.0.5.212 Build 20150212"} + {DW_AT_language @DW_LANG_C} + {DW_AT_name void-type.c} + {DW_AT_comp_dir /tmp} + } { + declare_labels main_type int_type ptr_type + + main_type: DW_TAG_base_type { + {DW_AT_byte_size 4 DW_FORM_sdata} + {DW_AT_encoding @DW_ATE_signed} + {DW_AT_name int} + } + + int_type: DW_TAG_base_type { + {DW_AT_byte_size 0 DW_FORM_sdata} + {DW_AT_encoding @DW_ATE_signed} + {DW_AT_name void} + } + + ptr_type: DW_TAG_pointer_type { + {DW_AT_type :$int_type} + } + + DW_TAG_subprogram { + {name func} + {low_pc $func_start addr} + {high_pc "$func_start + $func_length" addr} + {type :$int_type} + } + DW_TAG_subprogram { + {name main} + {low_pc $main_start addr} + {high_pc "$main_start + $main_length" addr} + {type :$main_type} + } + + DW_TAG_variable { + {DW_AT_name "var_a"} + {DW_AT_type :$int_type} + {DW_AT_external 1 DW_FORM_flag} + {DW_AT_location {DW_OP_addr [gdb_target_symbol "var_a"]} SPECIAL_expr} + } + + DW_TAG_variable { + {DW_AT_name "var_ptr"} + {DW_AT_type :$ptr_type} + {DW_AT_external 1 DW_FORM_flag} + {DW_AT_location {DW_OP_addr [gdb_target_symbol "var_ptr"]} SPECIAL_expr} + } + } + } +} + +if { [prepare_for_testing "failed to prepare" ${testfile} \ + [list $srcfile $asm_file] {nodebug}] } { + return -1 +} + +if ![runto_main] { + return -1 +} + +# Place a breakpoint in 'func' and continue to there. +gdb_breakpoint func +gdb_continue_to_breakpoint "func" + +# Check how GDB handles the void* variable. +gdb_test "p *var_ptr" "Attempt to dereference a generic pointer." \ + "check that dereferencing a void* gives a suitable message" + +# Now finish, returning to main. +gdb_test "finish" [multi_line \ + "Run till exit from #0 $hex in func \\\(\\\)" \ + "$hex in main \\\(\\\)"] \ + "check that finish completes" |