summaryrefslogtreecommitdiff
path: root/gdb/dwarf2loc.c
diff options
context:
space:
mode:
authorDoug Evans <dje@google.com>2012-04-28 23:22:11 +0000
committerDoug Evans <dje@google.com>2012-04-28 23:22:11 +0000
commit9ec1e83549cc1181a26e64712d805ef623afeb3b (patch)
tree642cc94c7a9d1db271c852aa272536dff15d6265 /gdb/dwarf2loc.c
parentde45b914ae4aa76fd7cb82ab4935ffd06fd9fc43 (diff)
downloadgdb-9ec1e83549cc1181a26e64712d805ef623afeb3b.tar.gz
Initial support for Fission. http://gcc.gnu.org/wiki/DebugFission
* symfile.c (default_symfile_relocate): Use sectp->owner instead of objfile->obfd. * symfile.h (dwarf2_debug_sections): New member addr. * dwarf2expr.c (execute_stack_op): New case DW_OP_GNU_addr_index. (ctx_no_get_addr_index): New function. * dwarf2expr.h (dwarf_expr_context_funcs): New member get_addr_index. (ctx_no_get_addr_index): Declare. * dwarf2-frame.c (dwarf2_frame_ctx_funcs): Update. * dwarf2loc.c (dwarf_expr_get_addr_index): New function. (dwarf_expr_ctx_funcs): Update. (needs_get_addr_index): New function. (needs_frame_ctx_funcs): Update. * dwarf2loc.h (dwarf2_read_addr_index): Declare. * dwarf2read.c: #include "gdbcore.h". (dwarf2_per_objfile): New members addr, dwo_files. (dwarf2_elf_names): Add entry for addr. (struct dwo_section_names): New type. (dwo_section_names): New static global. (dwarf2_cu): New members dwo_unit, addr_base, have_addr_base. (dwarf2_per_cu_data): New member is_debug_types, all boolean uses of old debug_types_section member updated to use this. Rename member debug_types_section to info_or_types_section, all uses updated. (signatured_type): Rename member type_offset to type_offset_in_tu, all uses updated. New member type_offset_in_section. (struct dwo_sections): New type. (struct dwo_unit): New type. (struct dwo_file): New type. (die_reader_specs): New member dwo_file. (dwarf2_locate_sections): Watch for .debug_addr. (zlib_decompress_section): Use sectp->owner instead of objfile->obfd. (dwarf2_read_section): Get bfd of section from bfd's asection, instead of objfile. (create_cus_from_index): Initialize the_cu->info_or_types_section. (create_signatured_type_table_from_index): Initialize sig_type->info_or_types_section. (dw2_get_file_names): Statement lists for type units with DWO files live in the DWO file. (create_debug_types_hash_table): New function. (create_all_type_units): Rewrite. (init_cu_die_reader): New arg dwo_file, all callers updated. (init_and_read_dies_worker): Get section from this_cu->info_or_types_section. Set sig_type->type_offset_in_section. Watch for DW_AT_GNU_dwo_name and if present lookup the file and continue reading the CU/TU from there. (init_cutu_and_read_dies_no_follow): New arg dwo_file, all callers updated. Get section from this_cu->info_or_types_section. (create_all_comp_units): Initialize this_cu->info_or_types_section. (skip_one_die): New cases DW_FORM_GNU_addr_index, DW_FORM_GNU_str_index. (hash_dwo_file, eq_dwo_file): New functions. (allocate_dwo_file_hash_table): New function. (hash_dwo_unit, eq_dwo_unit): New functions. (allocate_dwo_unit_table): New function. (dwarf2_locate_dwo_sections): New function. (struct create_dwo_info_table_data): New type. (create_debug_info_hash_table_reader): New function. (create_debug_info_hash_table): New function. (try_open_dwo_file, open_dwo_file, init_dwo_file): New function. (lookup_dwo_file): New function. (lookup_dwo_comp_unit, lookup_dwo_type_unit): New functions. (free_dwo_file, free_dwo_file_cleanup): New functions. (free_dwo_file_from_slot, free_dwo_files): New functions. (dwarf2_get_pc_bounds): Handle DW_FORM_GNU_addr_index. (dwarf2_record_block_ranges): Ditto. (read_partial_die): Ditto. (process_enumeration_scope): Update to use type_offset_in_section. (read_full_die_1): New function. (read_full_die): Rewrite. (read_attribute_value): New cases DW_FORM_GNU_addr_index, DW_FORM_GNU_str_index. (read_addr_index_1, read_addr_index): New functions. (read_addr_index_from_leb128): New function. (struct dwarf2_read_addr_index_data): New type. (dwarf2_read_addr_index_reader): New function. (dwarf2_read_addr_index): New function. (read_str_index): New function. (leb128_size): New function. (dwarf_decode_line_header): Delete arg abfd, all callers updated. If processing a type unit from a DWO file, get the line section from the DWO file. (var_decode_location): Watch for DW_OP_GNU_addr_index. (dwarf2_const_value_attr): New cases DW_FORM_GNU_addr_index, DW_FORM_GNU_str_index. (lookup_die_type): Check whether section offset of type's die is known before looking it up. Remove assert. Condition can legimately happen for inter-cu type references. (dwarf_attr_name): Handle Fission attributes. (dwarf_form_name): Handle Fission forms. (dump_die_shallow): New cases DW_FORM_GNU_addr_index, DW_FORM_GNU_str_index. (follow_die_sig): Update to use type_offset_in_section. (decode_locdesc): New case DW_OP_GNU_addr_index. (skip_form_bytes): New cases DW_FORM_GNU_addr_index, DW_FORM_GNU_str_index. (cu_debug_loc_section): New function. (fill_in_loclist_baton, dwarf2_symbol_mark_computed): Call it. (dwarf2_per_objfile_free): Unmap .debug_addr section. Free DWO files if present. * xcoffread.c (dwarf2_xcoff_names): Add .debug_addr. testsuite/ * gdb.dwarf2/dw2-intercu.S (.Ltype_int2_in_cu2): Renamed from .Ltype_int_in_cu2. Use name "int2" instead of "int". All uses updated. * gdb.dwarf2/dw2-intercu.exp: Add "ptype int2" ahead of "ptype func_cu1" to expand cu2 before cu1.
Diffstat (limited to 'gdb/dwarf2loc.c')
-rw-r--r--gdb/dwarf2loc.c26
1 files changed, 24 insertions, 2 deletions
diff --git a/gdb/dwarf2loc.c b/gdb/dwarf2loc.c
index 863a5fa3347..caef54634c0 100644
--- a/gdb/dwarf2loc.c
+++ b/gdb/dwarf2loc.c
@@ -1008,6 +1008,17 @@ dwarf_expr_push_dwarf_reg_entry_value (struct dwarf_expr_context *ctx,
ctx->baton = saved_ctx.baton;
}
+/* Callback function for dwarf2_evaluate_loc_desc.
+ Fetch the address indexed by DW_OP_GNU_addr_index. */
+
+static CORE_ADDR
+dwarf_expr_get_addr_index (void *baton, unsigned int index)
+{
+ struct dwarf_expr_baton *debaton = (struct dwarf_expr_baton *) baton;
+
+ return dwarf2_read_addr_index (debaton->per_cu, index);
+}
+
/* VALUE must be of type lval_computed with entry_data_value_funcs. Perform
the indirect method on it, that is use its stored target value, the sole
purpose of entry_data_value_funcs.. */
@@ -1942,7 +1953,8 @@ static const struct dwarf_expr_context_funcs dwarf_expr_ctx_funcs =
dwarf_expr_tls_address,
dwarf_expr_dwarf_call,
dwarf_expr_get_base_type,
- dwarf_expr_push_dwarf_reg_entry_value
+ dwarf_expr_push_dwarf_reg_entry_value,
+ dwarf_expr_get_addr_index
};
/* Evaluate a location description, starting at DATA and with length
@@ -2241,6 +2253,15 @@ needs_dwarf_reg_entry_value (struct dwarf_expr_context *ctx,
nf_baton->needs_frame = 1;
}
+/* DW_OP_GNU_addr_index doesn't require a frame. */
+
+static CORE_ADDR
+needs_get_addr_index (void *baton, unsigned int index)
+{
+ /* Nothing to do. */
+ return 1;
+}
+
/* Virtual method table for dwarf2_loc_desc_needs_frame below. */
static const struct dwarf_expr_context_funcs needs_frame_ctx_funcs =
@@ -2253,7 +2274,8 @@ static const struct dwarf_expr_context_funcs needs_frame_ctx_funcs =
needs_frame_tls_address,
needs_frame_dwarf_call,
NULL, /* get_base_type */
- needs_dwarf_reg_entry_value
+ needs_dwarf_reg_entry_value,
+ needs_get_addr_index
};
/* Return non-zero iff the location expression at DATA (length SIZE)