reader->buffer_end = section->buffer + section->size;
}
+/* Subroutine of init_cutu_and_read_dies to simplify it.
+ Read in the rest of a CU/TU top level DIE from DWO_UNIT.
+ There's just a lot of work to do, and init_cutu_and_read_dies is big enough
+ already.
+
+ STUB_COMP_UNIT_DIE is for the stub DIE, we copy over certain attributes
+ from it to the DIE in the DWO. If NULL we are skipping the stub.
+ *RESULT_READER,*RESULT_INFO_PTR,*RESULT_COMP_UNIT_DIE,*RESULT_HAS_CHILDREN
+ are filled in with the info of the DIE from the DWO file.
+ ABBREV_TABLE_PROVIDED is non-zero if the caller of init_cutu_and_read_dies
+ provided an abbrev table to use.
+ The result is non-zero if a valid (non-dummy) DIE was found. */
+
+static int
+read_cutu_die_from_dwo (struct dwarf2_per_cu_data *this_cu,
+ struct dwo_unit *dwo_unit,
+ int abbrev_table_provided,
+ struct die_info *stub_comp_unit_die,
+ struct die_reader_specs *result_reader,
+ gdb_byte **result_info_ptr,
+ struct die_info **result_comp_unit_die,
+ int *result_has_children)
+{
+ struct objfile *objfile = dwarf2_per_objfile->objfile;
+ struct dwarf2_cu *cu = this_cu->cu;
+ struct dwarf2_section_info *section;
+ bfd *abfd;
+ gdb_byte *begin_info_ptr, *info_ptr;
+ const char *comp_dir_string;
+ ULONGEST signature; /* Or dwo_id. */
+ struct attribute *comp_dir, *stmt_list, *low_pc, *high_pc, *ranges;
+ int i,num_extra_attrs;
+ struct dwarf2_section_info *dwo_abbrev_section;
+ struct attribute *attr;
+ struct die_info *comp_unit_die;
+
+ /* These attributes aren't processed until later:
+ DW_AT_stmt_list, DW_AT_low_pc, DW_AT_high_pc, DW_AT_ranges.
+ However, the attribute is found in the stub which we won't have later.
+ In order to not impose this complication on the rest of the code,
+ we read them here and copy them to the DWO CU/TU die. */
+
+ stmt_list = NULL;
+ low_pc = NULL;
+ high_pc = NULL;
+ ranges = NULL;
+ comp_dir = NULL;
+
+ if (stub_comp_unit_die != NULL)
+ {
+ /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
+ DWO file. */
+ if (! this_cu->is_debug_types)
+ stmt_list = dwarf2_attr (stub_comp_unit_die, DW_AT_stmt_list, cu);
+ low_pc = dwarf2_attr (stub_comp_unit_die, DW_AT_low_pc, cu);
+ high_pc = dwarf2_attr (stub_comp_unit_die, DW_AT_high_pc, cu);
+ ranges = dwarf2_attr (stub_comp_unit_die, DW_AT_ranges, cu);
+ comp_dir = dwarf2_attr (stub_comp_unit_die, DW_AT_comp_dir, cu);
+
+ /* There should be a DW_AT_addr_base attribute here (if needed).
+ We need the value before we can process DW_FORM_GNU_addr_index. */
+ cu->addr_base = 0;
+ attr = dwarf2_attr (stub_comp_unit_die, DW_AT_GNU_addr_base, cu);
+ if (attr)
+ cu->addr_base = DW_UNSND (attr);
+
+ /* There should be a DW_AT_ranges_base attribute here (if needed).
+ We need the value before we can process DW_AT_ranges. */
+ cu->ranges_base = 0;
+ attr = dwarf2_attr (stub_comp_unit_die, DW_AT_GNU_ranges_base, cu);
+ if (attr)
+ cu->ranges_base = DW_UNSND (attr);
+ }
+
+ /* Set up for reading the DWO CU/TU. */
+ cu->dwo_unit = dwo_unit;
+ section = dwo_unit->section;
+ dwarf2_read_section (objfile, section);
+ abfd = section->asection->owner;
+ begin_info_ptr = info_ptr = section->buffer + dwo_unit->offset.sect_off;
+ dwo_abbrev_section = &dwo_unit->dwo_file->sections.abbrev;
+ init_cu_die_reader (result_reader, cu, section, dwo_unit->dwo_file);
+
+ if (this_cu->is_debug_types)
+ {
+ ULONGEST header_signature;
+ cu_offset type_offset_in_tu;
+ struct signatured_type *sig_type = (struct signatured_type *) this_cu;
+
+ info_ptr = read_and_check_type_unit_head (&cu->header, section,
+ dwo_abbrev_section,
+ info_ptr,
+ &header_signature,
+ &type_offset_in_tu);
+ gdb_assert (sig_type->signature == header_signature);
+ gdb_assert (dwo_unit->offset.sect_off == cu->header.offset.sect_off);
+ /* For DWOs coming from DWP files, we don't know the CU length
+ nor the type's offset in the TU until now. */
+ dwo_unit->length = get_cu_length (&cu->header);
+ dwo_unit->type_offset_in_tu = type_offset_in_tu;
+
+ /* Establish the type offset that can be used to lookup the type.
+ For DWO files, we don't know it until now. */
+ sig_type->type_offset_in_section.sect_off =
+ dwo_unit->offset.sect_off + dwo_unit->type_offset_in_tu.cu_off;
+ }
+ else
+ {
+ info_ptr = read_and_check_comp_unit_head (&cu->header, section,
+ dwo_abbrev_section,
+ info_ptr, 0);
+ gdb_assert (dwo_unit->offset.sect_off == cu->header.offset.sect_off);
+ /* For DWOs coming from DWP files, we don't know the CU length
+ until now. */
+ dwo_unit->length = get_cu_length (&cu->header);
+ }
+
+ /* Replace the CU's original abbrev table with the DWO's. */
+ if (abbrev_table_provided)
+ {
+ /* Don't free the provided abbrev table, the caller of
+ init_cutu_and_read_dies owns it. */
+ dwarf2_read_abbrevs (cu, dwo_abbrev_section);
+ make_cleanup (dwarf2_free_abbrev_table, cu);
+ }
+ else
+ {
+ dwarf2_free_abbrev_table (cu);
+ dwarf2_read_abbrevs (cu, dwo_abbrev_section);
+ }
+
+ /* Read in the die, but leave space to copy over the attributes
+ from the stub. This has the benefit of simplifying the rest of
+ the code - all the work to maintain the illusion of a single
+ DW_TAG_{compile,type}_unit DIE is done here. */
+ num_extra_attrs = ((stmt_list != NULL)
+ + (low_pc != NULL)
+ + (high_pc != NULL)
+ + (ranges != NULL)
+ + (comp_dir != NULL));
+ info_ptr = read_full_die_1 (result_reader, result_comp_unit_die, info_ptr,
+ result_has_children, num_extra_attrs);
+
+ /* Copy over the attributes from the stub to the DIE we just read in. */
+ comp_unit_die = *result_comp_unit_die;
+ i = comp_unit_die->num_attrs;
+ if (stmt_list != NULL)
+ comp_unit_die->attrs[i++] = *stmt_list;
+ if (low_pc != NULL)
+ comp_unit_die->attrs[i++] = *low_pc;
+ if (high_pc != NULL)
+ comp_unit_die->attrs[i++] = *high_pc;
+ if (ranges != NULL)
+ comp_unit_die->attrs[i++] = *ranges;
+ if (comp_dir != NULL)
+ comp_unit_die->attrs[i++] = *comp_dir;
+ comp_unit_die->num_attrs += num_extra_attrs;
+
+ /* Skip dummy compilation units. */
+ if (info_ptr >= begin_info_ptr + dwo_unit->length
+ || peek_abbrev_code (abfd, info_ptr) == 0)
+ return 0;
+
+ *result_info_ptr = info_ptr;
+ return 1;
+}
+
+/* Subroutine of init_cutu_and_read_dies to simplify it.
+ Look up the DWO unit specified by COMP_UNIT_DIE of THIS_CU.
+ If the specified DWO unit cannot be found an error is thrown. */
+
+static struct dwo_unit *
+lookup_dwo_unit (struct dwarf2_per_cu_data *this_cu,
+ struct die_info *comp_unit_die)
+{
+ struct dwarf2_cu *cu = this_cu->cu;
+ struct attribute *attr;
+ ULONGEST signature;
+ struct dwo_unit *dwo_unit;
+ const char *comp_dir, *dwo_name;
+
+ /* Yeah, we look dwo_name up again, but it simplifies the code. */
+ attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_dwo_name, cu);
+ gdb_assert (attr != NULL);
+ dwo_name = DW_STRING (attr);
+ comp_dir = NULL;
+ attr = dwarf2_attr (comp_unit_die, DW_AT_comp_dir, cu);
+ if (attr)
+ comp_dir = DW_STRING (attr);
+
+ if (this_cu->is_debug_types)
+ {
+ struct signatured_type *sig_type;
+
+ /* Since this_cu is the first member of struct signatured_type,
+ we can go from a pointer to one to a pointer to the other. */
+ sig_type = (struct signatured_type *) this_cu;
+ signature = sig_type->signature;
+ dwo_unit = lookup_dwo_type_unit (sig_type, dwo_name, comp_dir);
+ }
+ else
+ {
+ struct attribute *attr;
+
+ attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_dwo_id, cu);
+ if (! attr)
+ error (_("Dwarf Error: missing dwo_id for dwo_name %s"
+ " [in module %s]"),
+ dwo_name, this_cu->objfile->name);
+ signature = DW_UNSND (attr);
+ dwo_unit = lookup_dwo_comp_unit (this_cu, dwo_name, comp_dir,
+ signature);
+ }
+
+ if (dwo_unit == NULL)
+ {
+ error (_("Dwarf Error: CU at offset 0x%x references unknown DWO"
+ " with ID %s [in module %s]"),
+ this_cu->offset.sect_off,
+ phex (signature, sizeof (signature)),
+ this_cu->objfile->name);
+ }
+
+ return dwo_unit;
+}
+
/* Initialize a CU (or TU) and read its DIEs.
If the CU defers to a DWO file, read the DWO file as well.
free_cu_cleanup = make_cleanup (free_heap_comp_unit, cu);
}
+ /* Get the header. */
if (cu->header.first_die_offset.cu_off != 0 && ! rereading_dwo_cu)
{
/* We already have the header, there's no need to read it in again. */
init_cu_die_reader (&reader, cu, section, NULL);
info_ptr = read_full_die (&reader, &comp_unit_die, info_ptr, &has_children);
- /* If we have a DWO stub, process it and then read in the DWO file.
- Note that if USE_EXISTING_OK != 0, and THIS_CU->cu already contains
- a DWO CU, that this test will fail. */
+ /* If we are in a DWO stub, process it and then read in the "real" CU/TU
+ from the DWO file.
+ Note that if USE_EXISTING_OK != 0, and THIS_CU->cu already contains a
+ DWO CU, that this test will fail (the attribute will not be present). */
attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_dwo_name, cu);
if (attr)
{
- const char *dwo_name = DW_STRING (attr);
- const char *comp_dir_string;
struct dwo_unit *dwo_unit;
- ULONGEST signature; /* Or dwo_id. */
- struct attribute *comp_dir, *stmt_list, *low_pc, *high_pc, *ranges;
- int i,num_extra_attrs;
- struct dwarf2_section_info *dwo_abbrev_section;
+ struct die_info *dwo_comp_unit_die;
if (has_children)
error (_("Dwarf Error: compilation unit with DW_AT_GNU_dwo_name"
" has children (offset 0x%x) [in module %s]"),
this_cu->offset.sect_off, bfd_get_filename (abfd));
-
- /* These attributes aren't processed until later:
- DW_AT_stmt_list, DW_AT_low_pc, DW_AT_high_pc, DW_AT_ranges.
- However, the attribute is found in the stub which we won't have later.
- In order to not impose this complication on the rest of the code,
- we read them here and copy them to the DWO CU/TU die. */
-
- /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
- DWO file. */
- stmt_list = NULL;
- if (! this_cu->is_debug_types)
- stmt_list = dwarf2_attr (comp_unit_die, DW_AT_stmt_list, cu);
- low_pc = dwarf2_attr (comp_unit_die, DW_AT_low_pc, cu);
- high_pc = dwarf2_attr (comp_unit_die, DW_AT_high_pc, cu);
- ranges = dwarf2_attr (comp_unit_die, DW_AT_ranges, cu);
- comp_dir = dwarf2_attr (comp_unit_die, DW_AT_comp_dir, cu);
-
- /* There should be a DW_AT_addr_base attribute here (if needed).
- We need the value before we can process DW_FORM_GNU_addr_index. */
- cu->addr_base = 0;
- attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_addr_base, cu);
- if (attr)
- cu->addr_base = DW_UNSND (attr);
-
- /* There should be a DW_AT_ranges_base attribute here (if needed).
- We need the value before we can process DW_AT_ranges. */
- cu->ranges_base = 0;
- attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_ranges_base, cu);
- if (attr)
- cu->ranges_base = DW_UNSND (attr);
-
- if (this_cu->is_debug_types)
- {
- gdb_assert (sig_type != NULL);
- signature = sig_type->signature;
- }
- else
- {
- attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_dwo_id, cu);
- if (! attr)
- error (_("Dwarf Error: missing dwo_id [in module %s]"),
- dwo_name);
- signature = DW_UNSND (attr);
- }
-
- /* We may need the comp_dir in order to find the DWO file. */
- comp_dir_string = NULL;
- if (comp_dir)
- comp_dir_string = DW_STRING (comp_dir);
-
- if (this_cu->is_debug_types)
- dwo_unit = lookup_dwo_type_unit (sig_type, dwo_name, comp_dir_string);
- else
- dwo_unit = lookup_dwo_comp_unit (this_cu, dwo_name, comp_dir_string,
- signature);
-
- if (dwo_unit == NULL)
- {
- error (_("Dwarf Error: CU at offset 0x%x references unknown DWO"
- " with ID %s [in module %s]"),
- this_cu->offset.sect_off,
- phex (signature, sizeof (signature)),
- objfile->name);
- }
-
- /* Set up for reading the DWO CU/TU. */
- cu->dwo_unit = dwo_unit;
- section = dwo_unit->section;
- dwarf2_read_section (objfile, section);
- begin_info_ptr = info_ptr = section->buffer + dwo_unit->offset.sect_off;
- dwo_abbrev_section = &dwo_unit->dwo_file->sections.abbrev;
- init_cu_die_reader (&reader, cu, section, dwo_unit->dwo_file);
-
- if (this_cu->is_debug_types)
- {
- ULONGEST signature;
- cu_offset type_offset_in_tu;
-
- info_ptr = read_and_check_type_unit_head (&cu->header, section,
- dwo_abbrev_section,
- info_ptr,
- &signature,
- &type_offset_in_tu);
- gdb_assert (sig_type->signature == signature);
- gdb_assert (dwo_unit->offset.sect_off == cu->header.offset.sect_off);
- /* For DWOs coming from DWP files, we don't know the CU length
- nor the type's offset in the TU until now. */
- dwo_unit->length = get_cu_length (&cu->header);
- dwo_unit->type_offset_in_tu = type_offset_in_tu;
-
- /* Establish the type offset that can be used to lookup the type.
- For DWO files, we don't know it until now. */
- sig_type->type_offset_in_section.sect_off =
- dwo_unit->offset.sect_off + dwo_unit->type_offset_in_tu.cu_off;
- }
- else
- {
- info_ptr = read_and_check_comp_unit_head (&cu->header, section,
- dwo_abbrev_section,
- info_ptr, 0);
- gdb_assert (dwo_unit->offset.sect_off == cu->header.offset.sect_off);
- /* For DWOs coming from DWP files, we don't know the CU length
- until now. */
- dwo_unit->length = get_cu_length (&cu->header);
- }
-
- /* Discard the original CU's abbrev table, and read the DWO's. */
- if (abbrev_table == NULL)
- {
- dwarf2_free_abbrev_table (cu);
- dwarf2_read_abbrevs (cu, dwo_abbrev_section);
- }
- else
- {
- dwarf2_read_abbrevs (cu, dwo_abbrev_section);
- make_cleanup (dwarf2_free_abbrev_table, cu);
- }
-
- /* Read in the die, but leave space to copy over the attributes
- from the stub. This has the benefit of simplifying the rest of
- the code - all the real work is done here. */
- num_extra_attrs = ((stmt_list != NULL)
- + (low_pc != NULL)
- + (high_pc != NULL)
- + (ranges != NULL)
- + (comp_dir != NULL));
- info_ptr = read_full_die_1 (&reader, &comp_unit_die, info_ptr,
- &has_children, num_extra_attrs);
-
- /* Copy over the attributes from the stub to the DWO die. */
- i = comp_unit_die->num_attrs;
- if (stmt_list != NULL)
- comp_unit_die->attrs[i++] = *stmt_list;
- if (low_pc != NULL)
- comp_unit_die->attrs[i++] = *low_pc;
- if (high_pc != NULL)
- comp_unit_die->attrs[i++] = *high_pc;
- if (ranges != NULL)
- comp_unit_die->attrs[i++] = *ranges;
- if (comp_dir != NULL)
- comp_unit_die->attrs[i++] = *comp_dir;
- comp_unit_die->num_attrs += num_extra_attrs;
-
- /* Skip dummy compilation units. */
- if (info_ptr >= begin_info_ptr + dwo_unit->length
- || peek_abbrev_code (abfd, info_ptr) == 0)
+ dwo_unit = lookup_dwo_unit (this_cu, comp_unit_die);
+ if (read_cutu_die_from_dwo (this_cu, dwo_unit,
+ abbrev_table != NULL,
+ comp_unit_die,
+ &reader, &info_ptr,
+ &dwo_comp_unit_die, &has_children) == 0)
{
+ /* Dummy die. */
do_cleanups (cleanups);
return;
}
+ comp_unit_die = dwo_comp_unit_die;
}
+ /* All of the above is setup for this call. Yikes. */
die_reader_func (&reader, info_ptr, comp_unit_die, has_children, data);
+ /* Done, clean up. */
if (free_cu_cleanup != NULL)
{
if (keep)
projects / binutils-gdb.git / commitdiff