static void dwarf2_find_base_address (struct die_info *die,
struct dwarf2_cu *cu);
+static struct partial_symtab *create_partial_symtab
+ (struct dwarf2_per_cu_data *per_cu, const char *name);
+
static void dwarf2_build_psymtabs_hard (struct objfile *);
static void scan_partial_symbols (struct partial_die_info *,
NULL,
die_reader_func, data);
}
+\f
+/* Type Unit Groups.
-/* Create a psymtab named NAME and assign it to PER_CU.
-
- The caller must fill in the following details:
- dirname, textlow, texthigh. */
-
-static struct partial_symtab *
-create_partial_symtab (struct dwarf2_per_cu_data *per_cu, const char *name)
-{
- struct objfile *objfile = per_cu->objfile;
- struct partial_symtab *pst;
-
- pst = start_psymtab_common (objfile, objfile->section_offsets,
- name, 0,
- objfile->global_psymbols.next,
- objfile->static_psymbols.next);
-
- pst->psymtabs_addrmap_supported = 1;
-
- /* This is the glue that links PST into GDB's symbol API. */
- pst->read_symtab_private = per_cu;
- pst->read_symtab = dwarf2_read_symtab;
- per_cu->v.psymtab = pst;
-
- return pst;
-}
-
-/* die_reader_func for process_psymtab_comp_unit. */
-
-static void
-process_psymtab_comp_unit_reader (const struct die_reader_specs *reader,
- gdb_byte *info_ptr,
- struct die_info *comp_unit_die,
- int has_children,
- void *data)
-{
- struct dwarf2_cu *cu = reader->cu;
- struct objfile *objfile = cu->objfile;
- struct dwarf2_per_cu_data *per_cu = cu->per_cu;
- struct attribute *attr;
- CORE_ADDR baseaddr;
- CORE_ADDR best_lowpc = 0, best_highpc = 0;
- struct partial_symtab *pst;
- int has_pc_info;
- const char *filename;
- int *want_partial_unit_ptr = data;
-
- if (comp_unit_die->tag == DW_TAG_partial_unit
- && (want_partial_unit_ptr == NULL
- || !*want_partial_unit_ptr))
- return;
-
- gdb_assert (! per_cu->is_debug_types);
-
- prepare_one_comp_unit (cu, comp_unit_die, language_minimal);
-
- cu->list_in_scope = &file_symbols;
-
- /* Allocate a new partial symbol table structure. */
- attr = dwarf2_attr (comp_unit_die, DW_AT_name, cu);
- if (attr == NULL || !DW_STRING (attr))
- filename = "";
- else
- filename = DW_STRING (attr);
-
- pst = create_partial_symtab (per_cu, filename);
-
- /* This must be done before calling dwarf2_build_include_psymtabs. */
- attr = dwarf2_attr (comp_unit_die, DW_AT_comp_dir, cu);
- if (attr != NULL)
- pst->dirname = DW_STRING (attr);
-
- baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
-
- dwarf2_find_base_address (comp_unit_die, cu);
-
- /* Possibly set the default values of LOWPC and HIGHPC from
- `DW_AT_ranges'. */
- has_pc_info = dwarf2_get_pc_bounds (comp_unit_die, &best_lowpc,
- &best_highpc, cu, pst);
- if (has_pc_info == 1 && best_lowpc < best_highpc)
- /* Store the contiguous range if it is not empty; it can be empty for
- CUs with no code. */
- addrmap_set_empty (objfile->psymtabs_addrmap,
- best_lowpc + baseaddr,
- best_highpc + baseaddr - 1, pst);
-
- /* Check if comp unit has_children.
- If so, read the rest of the partial symbols from this comp unit.
- If not, there's no more debug_info for this comp unit. */
- if (has_children)
- {
- struct partial_die_info *first_die;
- CORE_ADDR lowpc, highpc;
-
- lowpc = ((CORE_ADDR) -1);
- highpc = ((CORE_ADDR) 0);
-
- first_die = load_partial_dies (reader, info_ptr, 1);
-
- scan_partial_symbols (first_die, &lowpc, &highpc,
- ! has_pc_info, cu);
-
- /* If we didn't find a lowpc, set it to highpc to avoid
- complaints from `maint check'. */
- if (lowpc == ((CORE_ADDR) -1))
- lowpc = highpc;
-
- /* If the compilation unit didn't have an explicit address range,
- then use the information extracted from its child dies. */
- if (! has_pc_info)
- {
- best_lowpc = lowpc;
- best_highpc = highpc;
- }
- }
- pst->textlow = best_lowpc + baseaddr;
- pst->texthigh = best_highpc + baseaddr;
-
- pst->n_global_syms = objfile->global_psymbols.next -
- (objfile->global_psymbols.list + pst->globals_offset);
- pst->n_static_syms = objfile->static_psymbols.next -
- (objfile->static_psymbols.list + pst->statics_offset);
- sort_pst_symbols (objfile, pst);
-
- if (!VEC_empty (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs))
- {
- int i;
- int len = VEC_length (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs);
- struct dwarf2_per_cu_data *iter;
-
- /* Fill in 'dependencies' here; we fill in 'users' in a
- post-pass. */
- pst->number_of_dependencies = len;
- pst->dependencies = obstack_alloc (&objfile->objfile_obstack,
- len * sizeof (struct symtab *));
- for (i = 0;
- VEC_iterate (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs,
- i, iter);
- ++i)
- pst->dependencies[i] = iter->v.psymtab;
-
- VEC_free (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs);
- }
-
- /* Get the list of files included in the current compilation unit,
- and build a psymtab for each of them. */
- dwarf2_build_include_psymtabs (cu, comp_unit_die, pst);
-
- if (dwarf2_read_debug)
- {
- struct gdbarch *gdbarch = get_objfile_arch (objfile);
-
- fprintf_unfiltered (gdb_stdlog,
- "Psymtab for %s unit @0x%x: %s - %s"
- ", %d global, %d static syms\n",
- per_cu->is_debug_types ? "type" : "comp",
- per_cu->offset.sect_off,
- paddress (gdbarch, pst->textlow),
- paddress (gdbarch, pst->texthigh),
- pst->n_global_syms, pst->n_static_syms);
- }
-}
-
-/* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
- Process compilation unit THIS_CU for a psymtab. */
-
-static void
-process_psymtab_comp_unit (struct dwarf2_per_cu_data *this_cu,
- int want_partial_unit)
-{
- /* 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
- read in the compilation unit (see load_partial_dies).
- This problem could be avoided, but the benefit is unclear. */
- if (this_cu->cu != NULL)
- free_one_cached_comp_unit (this_cu);
-
- gdb_assert (! this_cu->is_debug_types);
- init_cutu_and_read_dies (this_cu, NULL, 0, 0,
- process_psymtab_comp_unit_reader,
- &want_partial_unit);
-
- /* Age out any secondary CUs. */
- age_cached_comp_units ();
-}
+ Type Unit Groups are a way to collapse the set of all TUs (type units) into
+ a more manageable set. The grouping is done by DW_AT_stmt_list entry
+ so that all types coming from the same compilation (.o file) are grouped
+ together. A future step could be to put the types in the same symtab as
+ the CU the types ultimately came from. */
static hashval_t
hash_type_unit_group (const void *item)
tu_stats->nr_stmt_less_type_units);
}
}
+\f
+/* Partial symbol tables. */
+
+/* Create a psymtab named NAME and assign it to PER_CU.
+
+ The caller must fill in the following details:
+ dirname, textlow, texthigh. */
+
+static struct partial_symtab *
+create_partial_symtab (struct dwarf2_per_cu_data *per_cu, const char *name)
+{
+ struct objfile *objfile = per_cu->objfile;
+ struct partial_symtab *pst;
+
+ pst = start_psymtab_common (objfile, objfile->section_offsets,
+ name, 0,
+ objfile->global_psymbols.next,
+ objfile->static_psymbols.next);
+
+ pst->psymtabs_addrmap_supported = 1;
+
+ /* This is the glue that links PST into GDB's symbol API. */
+ pst->read_symtab_private = per_cu;
+ pst->read_symtab = dwarf2_read_symtab;
+ per_cu->v.psymtab = pst;
+
+ return pst;
+}
+
+/* die_reader_func for process_psymtab_comp_unit. */
+
+static void
+process_psymtab_comp_unit_reader (const struct die_reader_specs *reader,
+ gdb_byte *info_ptr,
+ struct die_info *comp_unit_die,
+ int has_children,
+ void *data)
+{
+ struct dwarf2_cu *cu = reader->cu;
+ struct objfile *objfile = cu->objfile;
+ struct dwarf2_per_cu_data *per_cu = cu->per_cu;
+ struct attribute *attr;
+ CORE_ADDR baseaddr;
+ CORE_ADDR best_lowpc = 0, best_highpc = 0;
+ struct partial_symtab *pst;
+ int has_pc_info;
+ const char *filename;
+ int *want_partial_unit_ptr = data;
+
+ if (comp_unit_die->tag == DW_TAG_partial_unit
+ && (want_partial_unit_ptr == NULL
+ || !*want_partial_unit_ptr))
+ return;
+
+ gdb_assert (! per_cu->is_debug_types);
+
+ prepare_one_comp_unit (cu, comp_unit_die, language_minimal);
+
+ cu->list_in_scope = &file_symbols;
+
+ /* Allocate a new partial symbol table structure. */
+ attr = dwarf2_attr (comp_unit_die, DW_AT_name, cu);
+ if (attr == NULL || !DW_STRING (attr))
+ filename = "";
+ else
+ filename = DW_STRING (attr);
+
+ pst = create_partial_symtab (per_cu, filename);
+
+ /* This must be done before calling dwarf2_build_include_psymtabs. */
+ attr = dwarf2_attr (comp_unit_die, DW_AT_comp_dir, cu);
+ if (attr != NULL)
+ pst->dirname = DW_STRING (attr);
+
+ baseaddr = ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
+
+ dwarf2_find_base_address (comp_unit_die, cu);
+
+ /* Possibly set the default values of LOWPC and HIGHPC from
+ `DW_AT_ranges'. */
+ has_pc_info = dwarf2_get_pc_bounds (comp_unit_die, &best_lowpc,
+ &best_highpc, cu, pst);
+ if (has_pc_info == 1 && best_lowpc < best_highpc)
+ /* Store the contiguous range if it is not empty; it can be empty for
+ CUs with no code. */
+ addrmap_set_empty (objfile->psymtabs_addrmap,
+ best_lowpc + baseaddr,
+ best_highpc + baseaddr - 1, pst);
+
+ /* Check if comp unit has_children.
+ If so, read the rest of the partial symbols from this comp unit.
+ If not, there's no more debug_info for this comp unit. */
+ if (has_children)
+ {
+ struct partial_die_info *first_die;
+ CORE_ADDR lowpc, highpc;
+
+ lowpc = ((CORE_ADDR) -1);
+ highpc = ((CORE_ADDR) 0);
+
+ first_die = load_partial_dies (reader, info_ptr, 1);
+
+ scan_partial_symbols (first_die, &lowpc, &highpc,
+ ! has_pc_info, cu);
+
+ /* If we didn't find a lowpc, set it to highpc to avoid
+ complaints from `maint check'. */
+ if (lowpc == ((CORE_ADDR) -1))
+ lowpc = highpc;
+
+ /* If the compilation unit didn't have an explicit address range,
+ then use the information extracted from its child dies. */
+ if (! has_pc_info)
+ {
+ best_lowpc = lowpc;
+ best_highpc = highpc;
+ }
+ }
+ pst->textlow = best_lowpc + baseaddr;
+ pst->texthigh = best_highpc + baseaddr;
+
+ pst->n_global_syms = objfile->global_psymbols.next -
+ (objfile->global_psymbols.list + pst->globals_offset);
+ pst->n_static_syms = objfile->static_psymbols.next -
+ (objfile->static_psymbols.list + pst->statics_offset);
+ sort_pst_symbols (objfile, pst);
+
+ if (!VEC_empty (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs))
+ {
+ int i;
+ int len = VEC_length (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs);
+ struct dwarf2_per_cu_data *iter;
+
+ /* Fill in 'dependencies' here; we fill in 'users' in a
+ post-pass. */
+ pst->number_of_dependencies = len;
+ pst->dependencies = obstack_alloc (&objfile->objfile_obstack,
+ len * sizeof (struct symtab *));
+ for (i = 0;
+ VEC_iterate (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs,
+ i, iter);
+ ++i)
+ pst->dependencies[i] = iter->v.psymtab;
+
+ VEC_free (dwarf2_per_cu_ptr, cu->per_cu->imported_symtabs);
+ }
+
+ /* Get the list of files included in the current compilation unit,
+ and build a psymtab for each of them. */
+ dwarf2_build_include_psymtabs (cu, comp_unit_die, pst);
+
+ if (dwarf2_read_debug)
+ {
+ struct gdbarch *gdbarch = get_objfile_arch (objfile);
+
+ fprintf_unfiltered (gdb_stdlog,
+ "Psymtab for %s unit @0x%x: %s - %s"
+ ", %d global, %d static syms\n",
+ per_cu->is_debug_types ? "type" : "comp",
+ per_cu->offset.sect_off,
+ paddress (gdbarch, pst->textlow),
+ paddress (gdbarch, pst->texthigh),
+ pst->n_global_syms, pst->n_static_syms);
+ }
+}
+
+/* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
+ Process compilation unit THIS_CU for a psymtab. */
+
+static void
+process_psymtab_comp_unit (struct dwarf2_per_cu_data *this_cu,
+ int want_partial_unit)
+{
+ /* 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
+ read in the compilation unit (see load_partial_dies).
+ This problem could be avoided, but the benefit is unclear. */
+ if (this_cu->cu != NULL)
+ free_one_cached_comp_unit (this_cu);
+
+ gdb_assert (! this_cu->is_debug_types);
+ init_cutu_and_read_dies (this_cu, NULL, 0, 0,
+ process_psymtab_comp_unit_reader,
+ &want_partial_unit);
+
+ /* Age out any secondary CUs. */
+ age_cached_comp_units ();
+}
/* Reader function for build_type_psymtabs. */
projects / binutils-gdb.git / commitdiff