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fix PR symtab/15028 

This fixes some derivation.exp regressions with "dwz -m".

The bug here is that the imported PU is given language_minimal.
However, it ought to be C++.

The "pretend language" machinery exists to solve this problem, but it
wasn't handled in process_psymtab_comp_unit.  So, this patch adds it
there.

Built and regtested, both normally and using "dwz -m", on x86-64
Fedora 18.

	PR symtab/15028:
	* dwarf2read.c (struct process_psymtab_comp_unit_data): New.
	(process_psymtab_comp_unit_reader): Use it.
	(process_psymtab_comp_unit): Update.  Add "pretend_language"
	argument.
	(dwarf2_build_psymtabs_hard): Update.
	(scan_partial_symbols): Pass CU's language to
	process_psymtab_comp_unit.
This commit is contained in:
Tom Tromey 2013-08-07 20:10:36 +00:00
parent fa760f46b5
commit b93601f320
2 changed files with 38 additions and 9 deletions
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11
gdb/ChangeLog
View File

@ -1,3 +1,14 @@
2013-08-07 Tom Tromey <tromey@redhat.com>
PR symtab/15028:
* dwarf2read.c (struct process_psymtab_comp_unit_data): New.
(process_psymtab_comp_unit_reader): Use it.
(process_psymtab_comp_unit): Update. Add "pretend_language"
argument.
(dwarf2_build_psymtabs_hard): Update.
(scan_partial_symbols): Pass CU's language to
process_psymtab_comp_unit.
2013-08-07 Tom Tromey <tromey@redhat.com>
* dwarf2read.c (dw2_get_primary_filename_reader): Remove.

36
gdb/dwarf2read.c
View File

@ -5623,6 +5623,21 @@ create_partial_symtab (struct dwarf2_per_cu_data *per_cu, const char *name)
return pst;
}
/* The DATA object passed to process_psymtab_comp_unit_reader has this
type. */
struct process_psymtab_comp_unit_data
{
/* True if we are reading a DW_TAG_partial_unit. */
int want_partial_unit;
/* The "pretend" language that is used if the CU doesn't declare a
language. */
enum language pretend_language;
};
/* die_reader_func for process_psymtab_comp_unit. */
static void
@ -5641,16 +5656,14 @@ process_psymtab_comp_unit_reader (const struct die_reader_specs *reader,
struct partial_symtab *pst;
int has_pc_info;
const char *filename;
int *want_partial_unit_ptr = data;
struct process_psymtab_comp_unit_data *info = data;
if (comp_unit_die->tag == DW_TAG_partial_unit
&& (want_partial_unit_ptr == NULL
|| !*want_partial_unit_ptr))
if (comp_unit_die->tag == DW_TAG_partial_unit && !info->want_partial_unit)
return;
gdb_assert (! per_cu->is_debug_types);
prepare_one_comp_unit (cu, comp_unit_die, language_minimal);
prepare_one_comp_unit (cu, comp_unit_die, info->pretend_language);
cu->list_in_scope = &file_symbols;
@ -5765,8 +5778,11 @@ process_psymtab_comp_unit_reader (const struct die_reader_specs *reader,
static void
process_psymtab_comp_unit (struct dwarf2_per_cu_data *this_cu,
int want_partial_unit)
int want_partial_unit,
enum language pretend_language)
{
struct process_psymtab_comp_unit_data info;
/* If this compilation unit was already read in, free the
cached copy in order to read it in again. This is
necessary because we skipped some symbols when we first
@ -5776,9 +5792,11 @@ process_psymtab_comp_unit (struct dwarf2_per_cu_data *this_cu,
free_one_cached_comp_unit (this_cu);
gdb_assert (! this_cu->is_debug_types);
info.want_partial_unit = want_partial_unit;
info.pretend_language = pretend_language;
init_cutu_and_read_dies (this_cu, NULL, 0, 0,
process_psymtab_comp_unit_reader,
&want_partial_unit);
&info);
/* Age out any secondary CUs. */
age_cached_comp_units ();
@ -5956,7 +5974,7 @@ dwarf2_build_psymtabs_hard (struct objfile *objfile)
{
struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i);
process_psymtab_comp_unit (per_cu, 0);
process_psymtab_comp_unit (per_cu, 0, language_minimal);
}
set_partial_user (objfile);
@ -6178,7 +6196,7 @@ scan_partial_symbols (struct partial_die_info *first_die, CORE_ADDR *lowpc,
/* Go read the partial unit, if needed. */
if (per_cu->v.psymtab == NULL)
process_psymtab_comp_unit (per_cu, 1);
process_psymtab_comp_unit (per_cu, 1, cu->language);
VEC_safe_push (dwarf2_per_cu_ptr,
cu->per_cu->imported_symtabs, per_cu);