007e153034
This adds alignof and _Alignof to the C/C++ expression parser, and adds new tests to test the features. The tests are written to try to ensure that gdb's knowledge of alignment rules stays in sync with the compiler's. 2018-04-30 Tom Tromey <tom@tromey.com> PR exp/17095: * NEWS: Update. * std-operator.def (UNOP_ALIGNOF): New operator. * expprint.c (dump_subexp_body_standard) <case UNOP_ALIGNOF>: New. * eval.c (evaluate_subexp_standard) <case UNOP_ALIGNOF>: New. * c-lang.c (c_op_print_tab): Add alignof. * c-exp.y (ALIGNOF): New token. (exp): Add "ALIGNOF" production. (ident_tokens): Add _Alignof and alignof. 2018-04-30 Tom Tromey <tom@tromey.com> PR exp/17095: * gdb.dwarf2/dw2-align.exp: New file. * gdb.cp/align.exp: New file. * gdb.base/align.exp: New file. * lib/gdb.exp (gdb_int128_helper): New proc. (has_int128_c, has_int128_cxx): New caching procs.
110 lines
3.0 KiB
Plaintext
110 lines
3.0 KiB
Plaintext
# 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 file is part of the gdb testsuite
|
|
|
|
# This tests that C11 _Alignof works in gdb, and that it agrees with
|
|
# the compiler.
|
|
|
|
# The types we're going to test.
|
|
|
|
set typelist {
|
|
char {unsigned char}
|
|
short {unsigned short}
|
|
int {unsigned int}
|
|
long {unsigned long}
|
|
{long long} {unsigned long long}
|
|
float
|
|
double {long double}
|
|
}
|
|
|
|
if {[has_int128_c]} {
|
|
# Note we don't check "unsigned __int128" yet because at least gcc
|
|
# canonicalizes the name to "__int128 unsigned", and there isn't a
|
|
# c-exp.y production for this.
|
|
# https://sourceware.org/bugzilla/show_bug.cgi?id=20991
|
|
lappend typelist __int128
|
|
}
|
|
|
|
# Create the test file.
|
|
|
|
set filename [standard_output_file align.c]
|
|
set outfile [open $filename w]
|
|
|
|
# Prologue.
|
|
puts -nonewline $outfile "#define DEF(T,U) struct align_pair_ ## T ## _x_ ## U "
|
|
puts $outfile "{ T one; U two; }"
|
|
puts $outfile "unsigned a_void = _Alignof(void);"
|
|
|
|
# First emit single items.
|
|
foreach type $typelist {
|
|
set utype [join [split $type] _]
|
|
if {$type != $utype} {
|
|
puts $outfile "typedef $type $utype;"
|
|
}
|
|
puts $outfile "$type item_$utype;"
|
|
puts $outfile "unsigned a_$utype\n = _Alignof ($type);"
|
|
set utype [join [split $type] _]
|
|
}
|
|
|
|
# Now emit all pairs.
|
|
foreach type $typelist {
|
|
set utype [join [split $type] _]
|
|
foreach inner $typelist {
|
|
set uinner [join [split $inner] _]
|
|
puts $outfile "DEF ($utype, $uinner);"
|
|
set joined "${utype}_x_${uinner}"
|
|
puts $outfile "struct align_pair_$joined item_${joined};"
|
|
puts $outfile "unsigned a_${joined}"
|
|
puts $outfile " = _Alignof (struct align_pair_${joined});"
|
|
}
|
|
}
|
|
|
|
# Epilogue.
|
|
puts $outfile {
|
|
int main() {
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
close $outfile
|
|
|
|
standard_testfile $filename
|
|
|
|
if {[prepare_for_testing "failed to prepare" $testfile $srcfile {debug}]} {
|
|
return -1
|
|
}
|
|
|
|
if {![runto_main]} {
|
|
perror "test suppressed"
|
|
return
|
|
}
|
|
|
|
foreach type $typelist {
|
|
set utype [join [split $type] _]
|
|
set expected [get_integer_valueof a_$utype 0]
|
|
gdb_test "print _Alignof($type)" " = $expected"
|
|
|
|
foreach inner $typelist {
|
|
set uinner [join [split $inner] _]
|
|
set expected [get_integer_valueof a_${utype}_x_${uinner} 0]
|
|
gdb_test "print _Alignof(struct align_pair_${utype}_x_${uinner})" \
|
|
" = $expected"
|
|
}
|
|
}
|
|
|
|
set expected [get_integer_valueof a_void 0]
|
|
gdb_test "print _Alignof(void)" " = $expected"
|