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Fix language of compilation unit with unknown file extension

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Here, in dwarfread.c:process_full_comp_unit:

      /* Set symtab language to language from DW_AT_language.  If the
	 compilation is from a C file generated by language preprocessors, do
	 not set the language if it was already deduced by start_subfile.  */
      if (!(cu->language == language_c
	    && COMPUNIT_FILETABS (cust)->language != language_c))
	COMPUNIT_FILETABS (cust)->language = cu->language;

in case start_subfile doesn't manage to deduce a language
COMPUNIT_FILETABS(cust)->language ends up as language_unknown, not
language_c.  So the condition above evals false and we never set the
language from the cu's language.

gdb/ChangeLog:
2015-08-20  Pedro Alves  <palves@redhat.com>

	* dwarf2read.c (process_full_comp_unit): To tell whether
	start_subfile managed to deduce a language, test for
	language_unknown instead of language_c.

gdb/testsuite/ChangeLog:
2015-08-20  Pedro Alves  <palves@redhat.com>

	* gdb.dwarf2/comp-unit-lang.exp: New file.
	* gdb.dwarf2/comp-unit-lang.c: New file.
This commit is contained in:
Pedro Alves
2015-08-20 12:30:08 +01:00
parent af39b3270a
commit 40e3ad0ebb
5 changed files with 126 additions and 1 deletions
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34
gdb/testsuite/gdb.dwarf2/comp-unit-lang.c Normal file
View File

@ -0,0 +1,34 @@
/* This testcase is part of GDB, the GNU debugger.
Copyright 2011-2015 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/>. */
asm (".section \".text\"");
asm (".balign 8");
asm ("func_start: .globl func_start");
static void
func (void)
{
}
asm ("func_end: .globl func_end");
int
main (void)
{
func ();
return 0;
}