Fission support for multiple CUs per DWO file
In some cases a compiler may produce a single object file (& thus single DWO file) representing multiple source files. The most common example of this is in whole program optimization (such as LLVM's LTO). Fission may still be a beneficial feature to use here - to avoid the need to read/link the debug info with system libraries and the like. This change adds basic support for multiple CUs in a single DWO file to support LLVM's output in this situation. There is still outstanding work to design and implement a solution for cross-CU references (usually using DW_FORM_ref_addr) in this scenario. For now LLVM works around this by duplicating DIEs rather than making cross-CU references in DWO files. This degrades debugger behavior/quality especially for file-local entities. 2017-07-06 David Blaikie <dblaikie@gmail.com> * dwarf2read.c (struct dwo_file): Use a htab of dwo_unit* (rather than a singular dwo_unit*) to support multiple CUs in the same way that multiple TUs are supported. (create_cus_hash_table): Replace create_dwo_cu with a function for parsing multiple CUs from a DWO file. (open_and_init_dwo_file): Use create_cus_hash_table rather than create_dwo_cu. (lookup_dwo_cutu): Lookup CU in the hash table in the dwo_file with htab_find, rather than comparing the signature to a singleton CU in the dwo_file. 2017-07-06 David Blaikie <dblaikie@gmail.com> * gdb.dwarf2/fission-multi-cu.S: Test containing multiple CUs in a DWO, built from fissiont-multi-cu{1,2}.c. * gdb.dwarf2/fission-multi-cu.exp: Test similar to fission-base.exp, except putting 'main' and 'func' in separate CUs in the same DWO file. * gdb.dwarf2/fission-multi-cu1.c: First CU for the multi-CU-single-DWO test. * gdb.dwarf2/fission-multi-cu2.c: Second CU in the multi-CU-single-DWO test.
This commit is contained in:
parent
a0b7b10523
commit
33c5cd7587
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@ -1,3 +1,16 @@
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2017-07-06 David Blaikie <dblaikie@gmail.com>
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* dwarf2read.c (struct dwo_file): Use a htab of dwo_unit* (rather than
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a singular dwo_unit*) to support multiple CUs in the same way that
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multiple TUs are supported.
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(create_cus_hash_table): Replace create_dwo_cu with a function for
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parsing multiple CUs from a DWO file.
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(open_and_init_dwo_file): Use create_cus_hash_table rather than
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create_dwo_cu.
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(lookup_dwo_cutu): Lookup CU in the hash table in the dwo_file with
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htab_find, rather than comparing the signature to a singleton CU in
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the dwo_file.
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2017-07-06 Pedro Alves <palves@redhat.com>
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2017-07-06 Pedro Alves <palves@redhat.com>
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* python/py-unwind.c (pyuw_dealloc_cache): Fix for loop condition.
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* python/py-unwind.c (pyuw_dealloc_cache): Fix for loop condition.
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@ -855,12 +855,11 @@ struct dwo_file
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sections (for lack of a better name). */
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sections (for lack of a better name). */
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struct dwo_sections sections;
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struct dwo_sections sections;
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/* The CU in the file.
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/* The CUs in the file.
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We only support one because having more than one requires hacking the
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Each element is a struct dwo_unit. Multiple CUs per DWO are supported as
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dwo_name of each to match, which is highly unlikely to happen.
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an extension to handle LLVM's Link Time Optimization output (where
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Doing this means all TUs can share comp_dir: We also assume that
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multiple source files may be compiled into a single object/dwo pair). */
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DW_AT_comp_dir across all TUs in a DWO file will be identical. */
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htab_t cus;
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struct dwo_unit *cu;
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/* Table of TUs in the file.
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/* Table of TUs in the file.
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Each element is a struct dwo_unit. */
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Each element is a struct dwo_unit. */
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@ -9700,72 +9699,75 @@ create_dwo_cu_reader (const struct die_reader_specs *reader,
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hex_string (dwo_unit->signature));
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hex_string (dwo_unit->signature));
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}
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}
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/* Create the dwo_unit for the lone CU in DWO_FILE.
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/* Create the dwo_units for the CUs in a DWO_FILE.
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Note: This function processes DWO files only, not DWP files. */
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Note: This function processes DWO files only, not DWP files. */
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static struct dwo_unit *
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static void
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create_dwo_cu (struct dwo_file *dwo_file)
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create_cus_hash_table (struct dwo_file &dwo_file, dwarf2_section_info §ion,
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htab_t &cus_htab)
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{
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{
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struct objfile *objfile = dwarf2_per_objfile->objfile;
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struct objfile *objfile = dwarf2_per_objfile->objfile;
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struct dwarf2_section_info *section = &dwo_file->sections.info;
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const struct dwarf2_section_info *abbrev_section = &dwo_file.sections.abbrev;
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const gdb_byte *info_ptr, *end_ptr;
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const gdb_byte *info_ptr, *end_ptr;
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struct create_dwo_cu_data create_dwo_cu_data;
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struct dwo_unit *dwo_unit;
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dwarf2_read_section (objfile, section);
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dwarf2_read_section (objfile, §ion);
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info_ptr = section->buffer;
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info_ptr = section.buffer;
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if (info_ptr == NULL)
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if (info_ptr == NULL)
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return NULL;
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return;
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if (dwarf_read_debug)
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if (dwarf_read_debug)
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{
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{
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fprintf_unfiltered (gdb_stdlog, "Reading %s for %s:\n",
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fprintf_unfiltered (gdb_stdlog, "Reading %s for %s:\n",
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get_section_name (section),
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get_section_name (§ion),
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get_section_file_name (section));
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get_section_file_name (§ion));
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}
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}
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create_dwo_cu_data.dwo_file = dwo_file;
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end_ptr = info_ptr + section.size;
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dwo_unit = NULL;
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end_ptr = info_ptr + section->size;
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while (info_ptr < end_ptr)
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while (info_ptr < end_ptr)
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{
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{
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struct dwarf2_per_cu_data per_cu;
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struct dwarf2_per_cu_data per_cu;
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struct create_dwo_cu_data create_dwo_cu_data;
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struct dwo_unit *dwo_unit;
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void **slot;
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sect_offset sect_off = (sect_offset) (info_ptr - section.buffer);
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memset (&create_dwo_cu_data.dwo_unit, 0,
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memset (&create_dwo_cu_data.dwo_unit, 0,
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sizeof (create_dwo_cu_data.dwo_unit));
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sizeof (create_dwo_cu_data.dwo_unit));
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memset (&per_cu, 0, sizeof (per_cu));
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memset (&per_cu, 0, sizeof (per_cu));
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per_cu.objfile = objfile;
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per_cu.objfile = objfile;
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per_cu.is_debug_types = 0;
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per_cu.is_debug_types = 0;
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per_cu.sect_off = sect_offset (info_ptr - section->buffer);
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per_cu.sect_off = sect_offset (info_ptr - section.buffer);
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per_cu.section = section;
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per_cu.section = §ion;
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init_cutu_and_read_dies_no_follow (&per_cu, dwo_file,
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init_cutu_and_read_dies_no_follow (
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create_dwo_cu_reader,
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&per_cu, &dwo_file, create_dwo_cu_reader, &create_dwo_cu_data);
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&create_dwo_cu_data);
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info_ptr += per_cu.length;
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if (create_dwo_cu_data.dwo_unit.dwo_file != NULL)
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// If the unit could not be parsed, skip it.
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{
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if (create_dwo_cu_data.dwo_unit.dwo_file == NULL)
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/* If we've already found one, complain. We only support one
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continue;
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because having more than one requires hacking the dwo_name of
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each to match, which is highly unlikely to happen. */
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if (cus_htab == NULL)
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if (dwo_unit != NULL)
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cus_htab = allocate_dwo_unit_table (objfile);
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{
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complaint (&symfile_complaints,
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_("Multiple CUs in DWO file %s [in module %s]"),
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dwo_file->dwo_name, objfile_name (objfile));
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break;
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}
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dwo_unit = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_unit);
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dwo_unit = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_unit);
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*dwo_unit = create_dwo_cu_data.dwo_unit;
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*dwo_unit = create_dwo_cu_data.dwo_unit;
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}
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slot = htab_find_slot (cus_htab, dwo_unit, INSERT);
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gdb_assert (slot != NULL);
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if (*slot != NULL)
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{
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const struct dwo_unit *dup_cu = (const struct dwo_unit *)*slot;
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sect_offset dup_sect_off = dup_cu->sect_off;
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info_ptr += per_cu.length;
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complaint (&symfile_complaints,
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_("debug cu entry at offset 0x%x is duplicate to"
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" the entry at offset 0x%x, signature %s"),
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to_underlying (sect_off), to_underlying (dup_sect_off),
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hex_string (dwo_unit->signature));
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}
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*slot = (void *)dwo_unit;
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}
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}
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return dwo_unit;
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}
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}
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/* DWP file .debug_{cu,tu}_index section format:
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/* DWP file .debug_{cu,tu}_index section format:
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@ -10770,7 +10772,7 @@ open_and_init_dwo_file (struct dwarf2_per_cu_data *per_cu,
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bfd_map_over_sections (dwo_file->dbfd, dwarf2_locate_dwo_sections,
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bfd_map_over_sections (dwo_file->dbfd, dwarf2_locate_dwo_sections,
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&dwo_file->sections);
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&dwo_file->sections);
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dwo_file->cu = create_dwo_cu (dwo_file);
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create_cus_hash_table (*dwo_file, dwo_file->sections.info, dwo_file->cus);
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create_debug_types_hash_table (dwo_file, dwo_file->sections.types,
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create_debug_types_hash_table (dwo_file, dwo_file->sections.types,
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dwo_file->tus);
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dwo_file->tus);
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@ -11137,10 +11139,14 @@ lookup_dwo_cutu (struct dwarf2_per_cu_data *this_unit,
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dwo_cutu
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dwo_cutu
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= (struct dwo_unit *) htab_find (dwo_file->tus, &find_dwo_cutu);
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= (struct dwo_unit *) htab_find (dwo_file->tus, &find_dwo_cutu);
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}
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}
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else if (!is_debug_types && dwo_file->cu)
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else if (!is_debug_types && dwo_file->cus)
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{
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{
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if (signature == dwo_file->cu->signature)
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struct dwo_unit find_dwo_cutu;
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dwo_cutu = dwo_file->cu;
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memset (&find_dwo_cutu, 0, sizeof (find_dwo_cutu));
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find_dwo_cutu.signature = signature;
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dwo_cutu = (struct dwo_unit *)htab_find (dwo_file->cus,
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&find_dwo_cutu);
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}
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}
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if (dwo_cutu != NULL)
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if (dwo_cutu != NULL)
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@ -1,3 +1,14 @@
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2017-07-06 David Blaikie <dblaikie@gmail.com>
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* gdb.dwarf2/fission-multi-cu.S: Test containing multiple CUs in a DWO,
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built from fissiont-multi-cu{1,2}.c.
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* gdb.dwarf2/fission-multi-cu.exp: Test similar to fission-base.exp,
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except putting 'main' and 'func' in separate CUs in the same DWO file.
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* gdb.dwarf2/fission-multi-cu1.c: First CU for the multi-CU-single-DWO
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test.
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* gdb.dwarf2/fission-multi-cu2.c: Second CU in the multi-CU-single-DWO
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test.
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2017-07-06 Pedro Alves <palves@redhat.com>
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2017-07-06 Pedro Alves <palves@redhat.com>
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* gdb.python/py-unwind.exp: Test flushregs.
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* gdb.python/py-unwind.exp: Test flushregs.
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@ -0,0 +1,374 @@
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/* This testcase is part of GDB, the GNU debugger.
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Copyright 2012-2017 Free Software Foundation, Inc.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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This file was created by doing:
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clang fission-multi-cu*.c -g -fno-split-dwarf-inlining -emit-llvm -S -c
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llvm-link fission-multi-cu*.ll -S -o fission-multi-cu.ll
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clang-tot fission-multi-cu.ll -gsplit-dwarf -S
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and then massaging the output.
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*/
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.text
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.file "llvm-link"
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.globl func
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.p2align 4, 0x90
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.type func,@function
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func: # @func
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.Lfunc_begin0:
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.file 1 "fission-multi-cu1.c"
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.loc 1 20 0 # fission-multi-cu1.c:20:0
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.cfi_startproc
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# BB#0: # %entry
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pushq %rbp
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.cfi_def_cfa_offset 16
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.cfi_offset %rbp, -16
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movq %rsp, %rbp
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.cfi_def_cfa_register %rbp
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movl %edi, -4(%rbp)
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.loc 1 21 10 prologue_end # fission-multi-cu1.c:21:10
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movl -4(%rbp), %edi
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.loc 1 21 14 is_stmt 0 # fission-multi-cu1.c:21:14
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addl $1, %edi
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.loc 1 21 3 # fission-multi-cu1.c:21:3
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movl %edi, %eax
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popq %rbp
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retq
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.Lfunc_end0:
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.size func, .Lfunc_end0-func
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.cfi_endproc
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.globl main
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.p2align 4, 0x90
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.type main,@function
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main: # @main
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.Lfunc_begin1:
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.file 2 "fission-multi-cu2.c"
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.loc 2 23 0 is_stmt 1 # fission-multi-cu2.c:23:0
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.cfi_startproc
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# BB#0: # %entry
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pushq %rbp
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.cfi_def_cfa_offset 16
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.cfi_offset %rbp, -16
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movq %rsp, %rbp
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.cfi_def_cfa_register %rbp
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movl $4294967295, %edi # imm = 0xFFFFFFFF
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.loc 2 24 3 prologue_end # fission-multi-cu2.c:24:3
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movb $0, %al
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callq func
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xorl %eax, %eax
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.loc 2 25 1 # fission-multi-cu2.c:25:1
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popq %rbp
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retq
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.Lfunc_end1:
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.size main, .Lfunc_end1-main
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.cfi_endproc
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.section .debug_str,"MS",@progbits,1
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.Lskel_string0:
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.asciz "fission-multi-cu.dwo" # string offset=0
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.Lskel_string1:
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.asciz "/tmp/src/gdb/testsuite" # string offset=21
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.section .debug_loc.dwo,"",@progbits
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.section .debug_abbrev,"",@progbits
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.byte 1 # Abbreviation Code
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.byte 17 # DW_TAG_compile_unit
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.byte 0 # DW_CHILDREN_no
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.byte 16 # DW_AT_stmt_list
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.byte 23 # DW_FORM_sec_offset
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.ascii "\260B" # DW_AT_GNU_dwo_name
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.byte 14 # DW_FORM_strp
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.byte 27 # DW_AT_comp_dir
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.byte 14 # DW_FORM_strp
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.ascii "\261B" # DW_AT_GNU_dwo_id
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.byte 7 # DW_FORM_data8
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.ascii "\263B" # DW_AT_GNU_addr_base
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.byte 23 # DW_FORM_sec_offset
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.byte 17 # DW_AT_low_pc
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.byte 1 # DW_FORM_addr
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.byte 18 # DW_AT_high_pc
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.byte 6 # DW_FORM_data4
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.byte 0 # EOM(1)
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.byte 0 # EOM(2)
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.byte 0 # EOM(3)
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.section .debug_info,"",@progbits
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.Lcu_begin0:
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.long 44 # Length of Unit
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.short 4 # DWARF version number
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.long .debug_abbrev # Offset Into Abbrev. Section
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.byte 8 # Address Size (in bytes)
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.byte 1 # Abbrev [1] 0xb:0x25 DW_TAG_compile_unit
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.long .Lline_table_start0 # DW_AT_stmt_list
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.long .Lskel_string0 # DW_AT_GNU_dwo_name
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.long .Lskel_string1 # DW_AT_comp_dir
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.quad 7615852067747431413 # DW_AT_GNU_dwo_id
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.long .debug_addr # DW_AT_GNU_addr_base
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.quad .Lfunc_begin0 # DW_AT_low_pc
|
||||||
|
.long .Lfunc_end0-.Lfunc_begin0 # DW_AT_high_pc
|
||||||
|
.Lcu_begin1:
|
||||||
|
.long 44 # Length of Unit
|
||||||
|
.short 4 # DWARF version number
|
||||||
|
.long .debug_abbrev # Offset Into Abbrev. Section
|
||||||
|
.byte 8 # Address Size (in bytes)
|
||||||
|
.byte 1 # Abbrev [1] 0xb:0x25 DW_TAG_compile_unit
|
||||||
|
.long .Lline_table_start0 # DW_AT_stmt_list
|
||||||
|
.long .Lskel_string0 # DW_AT_GNU_dwo_name
|
||||||
|
.long .Lskel_string1 # DW_AT_comp_dir
|
||||||
|
.quad 2037650261599692324 # DW_AT_GNU_dwo_id
|
||||||
|
.long .debug_addr # DW_AT_GNU_addr_base
|
||||||
|
.quad .Lfunc_begin1 # DW_AT_low_pc
|
||||||
|
.long .Lfunc_end1-.Lfunc_begin1 # DW_AT_high_pc
|
||||||
|
.section .debug_ranges,"",@progbits
|
||||||
|
.section .debug_macinfo,"",@progbits
|
||||||
|
.Lcu_macro_begin1:
|
||||||
|
.Lcu_macro_begin3:
|
||||||
|
.byte 0 # End Of Macro List Mark
|
||||||
|
.section .debug_str.dwo,"MS",@progbits,1
|
||||||
|
.Linfo_string0:
|
||||||
|
.asciz "fission-multi-cu.dwo" # string offset=0
|
||||||
|
.Linfo_string1:
|
||||||
|
.asciz "clang version 5.0.0 (trunk 302855) (llvm/trunk 302853)" # string offset=21
|
||||||
|
.Linfo_string2:
|
||||||
|
.asciz "fission-multi-cu1.c" # string offset=76
|
||||||
|
.Linfo_string3:
|
||||||
|
.asciz "fission-multi-cu2.c" # string offset=96
|
||||||
|
.Linfo_string4:
|
||||||
|
.asciz "func" # string offset=116
|
||||||
|
.Linfo_string5:
|
||||||
|
.asciz "int" # string offset=121
|
||||||
|
.Linfo_string6:
|
||||||
|
.asciz "main" # string offset=125
|
||||||
|
.Linfo_string7:
|
||||||
|
.asciz "arg" # string offset=130
|
||||||
|
.section .debug_str_offsets.dwo,"",@progbits
|
||||||
|
.long 0
|
||||||
|
.long 21
|
||||||
|
.long 76
|
||||||
|
.long 96
|
||||||
|
.long 116
|
||||||
|
.long 121
|
||||||
|
.long 125
|
||||||
|
.long 130
|
||||||
|
.section .debug_info.dwo,"",@progbits
|
||||||
|
.long 53 # Length of Unit
|
||||||
|
.short 4 # DWARF version number
|
||||||
|
.long 0 # Offset Into Abbrev. Section
|
||||||
|
.byte 8 # Address Size (in bytes)
|
||||||
|
.byte 1 # Abbrev [1] 0xb:0x2e DW_TAG_compile_unit
|
||||||
|
.byte 0 # DW_AT_GNU_dwo_name
|
||||||
|
.byte 1 # DW_AT_producer
|
||||||
|
.short 12 # DW_AT_language
|
||||||
|
.byte 2 # DW_AT_name
|
||||||
|
.quad 7615852067747431413 # DW_AT_GNU_dwo_id
|
||||||
|
.byte 2 # Abbrev [2] 0x19:0x1b DW_TAG_subprogram
|
||||||
|
.byte 0 # DW_AT_low_pc
|
||||||
|
.long .Lfunc_end0-.Lfunc_begin0 # DW_AT_high_pc
|
||||||
|
.byte 1 # DW_AT_frame_base
|
||||||
|
.byte 86
|
||||||
|
.byte 4 # DW_AT_name
|
||||||
|
.byte 1 # DW_AT_decl_file
|
||||||
|
.byte 19 # DW_AT_decl_line
|
||||||
|
# DW_AT_prototyped
|
||||||
|
.long 52 # DW_AT_type
|
||||||
|
# DW_AT_external
|
||||||
|
.byte 3 # Abbrev [3] 0x28:0xb DW_TAG_formal_parameter
|
||||||
|
.byte 2 # DW_AT_location
|
||||||
|
.byte 145
|
||||||
|
.byte 124
|
||||||
|
.byte 7 # DW_AT_name
|
||||||
|
.byte 1 # DW_AT_decl_file
|
||||||
|
.byte 19 # DW_AT_decl_line
|
||||||
|
.long 52 # DW_AT_type
|
||||||
|
.byte 0 # End Of Children Mark
|
||||||
|
.byte 4 # Abbrev [4] 0x34:0x4 DW_TAG_base_type
|
||||||
|
.byte 5 # DW_AT_name
|
||||||
|
.byte 5 # DW_AT_encoding
|
||||||
|
.byte 4 # DW_AT_byte_size
|
||||||
|
.byte 0 # End Of Children Mark
|
||||||
|
.long 41 # Length of Unit
|
||||||
|
.short 4 # DWARF version number
|
||||||
|
.long 0 # Offset Into Abbrev. Section
|
||||||
|
.byte 8 # Address Size (in bytes)
|
||||||
|
.byte 1 # Abbrev [1] 0xb:0x22 DW_TAG_compile_unit
|
||||||
|
.byte 0 # DW_AT_GNU_dwo_name
|
||||||
|
.byte 1 # DW_AT_producer
|
||||||
|
.short 12 # DW_AT_language
|
||||||
|
.byte 3 # DW_AT_name
|
||||||
|
.quad 2037650261599692324 # DW_AT_GNU_dwo_id
|
||||||
|
.byte 5 # Abbrev [5] 0x19:0xf DW_TAG_subprogram
|
||||||
|
.byte 1 # DW_AT_low_pc
|
||||||
|
.long .Lfunc_end1-.Lfunc_begin1 # DW_AT_high_pc
|
||||||
|
.byte 1 # DW_AT_frame_base
|
||||||
|
.byte 86
|
||||||
|
.byte 6 # DW_AT_name
|
||||||
|
.byte 2 # DW_AT_decl_file
|
||||||
|
.byte 22 # DW_AT_decl_line
|
||||||
|
.long 40 # DW_AT_type
|
||||||
|
# DW_AT_external
|
||||||
|
.byte 4 # Abbrev [4] 0x28:0x4 DW_TAG_base_type
|
||||||
|
.byte 5 # DW_AT_name
|
||||||
|
.byte 5 # DW_AT_encoding
|
||||||
|
.byte 4 # DW_AT_byte_size
|
||||||
|
.byte 0 # End Of Children Mark
|
||||||
|
.section .debug_abbrev.dwo,"",@progbits
|
||||||
|
.byte 1 # Abbreviation Code
|
||||||
|
.byte 17 # DW_TAG_compile_unit
|
||||||
|
.byte 1 # DW_CHILDREN_yes
|
||||||
|
.ascii "\260B" # DW_AT_GNU_dwo_name
|
||||||
|
.ascii "\202>" # DW_FORM_GNU_str_index
|
||||||
|
.byte 37 # DW_AT_producer
|
||||||
|
.ascii "\202>" # DW_FORM_GNU_str_index
|
||||||
|
.byte 19 # DW_AT_language
|
||||||
|
.byte 5 # DW_FORM_data2
|
||||||
|
.byte 3 # DW_AT_name
|
||||||
|
.ascii "\202>" # DW_FORM_GNU_str_index
|
||||||
|
.ascii "\261B" # DW_AT_GNU_dwo_id
|
||||||
|
.byte 7 # DW_FORM_data8
|
||||||
|
.byte 0 # EOM(1)
|
||||||
|
.byte 0 # EOM(2)
|
||||||
|
.byte 2 # Abbreviation Code
|
||||||
|
.byte 46 # DW_TAG_subprogram
|
||||||
|
.byte 1 # DW_CHILDREN_yes
|
||||||
|
.byte 17 # DW_AT_low_pc
|
||||||
|
.ascii "\201>" # DW_FORM_GNU_addr_index
|
||||||
|
.byte 18 # DW_AT_high_pc
|
||||||
|
.byte 6 # DW_FORM_data4
|
||||||
|
.byte 64 # DW_AT_frame_base
|
||||||
|
.byte 24 # DW_FORM_exprloc
|
||||||
|
.byte 3 # DW_AT_name
|
||||||
|
.ascii "\202>" # DW_FORM_GNU_str_index
|
||||||
|
.byte 58 # DW_AT_decl_file
|
||||||
|
.byte 11 # DW_FORM_data1
|
||||||
|
.byte 59 # DW_AT_decl_line
|
||||||
|
.byte 11 # DW_FORM_data1
|
||||||
|
.byte 39 # DW_AT_prototyped
|
||||||
|
.byte 25 # DW_FORM_flag_present
|
||||||
|
.byte 73 # DW_AT_type
|
||||||
|
.byte 19 # DW_FORM_ref4
|
||||||
|
.byte 63 # DW_AT_external
|
||||||
|
.byte 25 # DW_FORM_flag_present
|
||||||
|
.byte 0 # EOM(1)
|
||||||
|
.byte 0 # EOM(2)
|
||||||
|
.byte 3 # Abbreviation Code
|
||||||
|
.byte 5 # DW_TAG_formal_parameter
|
||||||
|
.byte 0 # DW_CHILDREN_no
|
||||||
|
.byte 2 # DW_AT_location
|
||||||
|
.byte 24 # DW_FORM_exprloc
|
||||||
|
.byte 3 # DW_AT_name
|
||||||
|
.ascii "\202>" # DW_FORM_GNU_str_index
|
||||||
|
.byte 58 # DW_AT_decl_file
|
||||||
|
.byte 11 # DW_FORM_data1
|
||||||
|
.byte 59 # DW_AT_decl_line
|
||||||
|
.byte 11 # DW_FORM_data1
|
||||||
|
.byte 73 # DW_AT_type
|
||||||
|
.byte 19 # DW_FORM_ref4
|
||||||
|
.byte 0 # EOM(1)
|
||||||
|
.byte 0 # EOM(2)
|
||||||
|
.byte 4 # Abbreviation Code
|
||||||
|
.byte 36 # DW_TAG_base_type
|
||||||
|
.byte 0 # DW_CHILDREN_no
|
||||||
|
.byte 3 # DW_AT_name
|
||||||
|
.ascii "\202>" # DW_FORM_GNU_str_index
|
||||||
|
.byte 62 # DW_AT_encoding
|
||||||
|
.byte 11 # DW_FORM_data1
|
||||||
|
.byte 11 # DW_AT_byte_size
|
||||||
|
.byte 11 # DW_FORM_data1
|
||||||
|
.byte 0 # EOM(1)
|
||||||
|
.byte 0 # EOM(2)
|
||||||
|
.byte 5 # Abbreviation Code
|
||||||
|
.byte 46 # DW_TAG_subprogram
|
||||||
|
.byte 0 # DW_CHILDREN_no
|
||||||
|
.byte 17 # DW_AT_low_pc
|
||||||
|
.ascii "\201>" # DW_FORM_GNU_addr_index
|
||||||
|
.byte 18 # DW_AT_high_pc
|
||||||
|
.byte 6 # DW_FORM_data4
|
||||||
|
.byte 64 # DW_AT_frame_base
|
||||||
|
.byte 24 # DW_FORM_exprloc
|
||||||
|
.byte 3 # DW_AT_name
|
||||||
|
.ascii "\202>" # DW_FORM_GNU_str_index
|
||||||
|
.byte 58 # DW_AT_decl_file
|
||||||
|
.byte 11 # DW_FORM_data1
|
||||||
|
.byte 59 # DW_AT_decl_line
|
||||||
|
.byte 11 # DW_FORM_data1
|
||||||
|
.byte 73 # DW_AT_type
|
||||||
|
.byte 19 # DW_FORM_ref4
|
||||||
|
.byte 63 # DW_AT_external
|
||||||
|
.byte 25 # DW_FORM_flag_present
|
||||||
|
.byte 0 # EOM(1)
|
||||||
|
.byte 0 # EOM(2)
|
||||||
|
.byte 0 # EOM(3)
|
||||||
|
.section .debug_line.dwo,"",@progbits
|
||||||
|
.Ltmp4:
|
||||||
|
.long (.Ltmp5-.Ltmp4)-4
|
||||||
|
.short 2
|
||||||
|
.long (.Ltmp6-.Ltmp4)-10
|
||||||
|
.byte 1
|
||||||
|
.byte 1
|
||||||
|
.byte -5
|
||||||
|
.byte 14
|
||||||
|
.byte 1
|
||||||
|
.byte 0
|
||||||
|
.byte 0
|
||||||
|
.Ltmp6:
|
||||||
|
.Ltmp5:
|
||||||
|
.section .debug_addr,"",@progbits
|
||||||
|
.quad .Lfunc_begin0
|
||||||
|
.quad .Lfunc_begin1
|
||||||
|
.section .debug_pubnames,"",@progbits
|
||||||
|
.long .LpubNames_end0-.LpubNames_begin0 # Length of Public Names Info
|
||||||
|
.LpubNames_begin0:
|
||||||
|
.short 2 # DWARF Version
|
||||||
|
.long .Lcu_begin0 # Offset of Compilation Unit Info
|
||||||
|
.long 48 # Compilation Unit Length
|
||||||
|
.long 25 # DIE offset
|
||||||
|
.asciz "func" # External Name
|
||||||
|
.long 0 # End Mark
|
||||||
|
.LpubNames_end0:
|
||||||
|
.long .LpubNames_end1-.LpubNames_begin1 # Length of Public Names Info
|
||||||
|
.LpubNames_begin1:
|
||||||
|
.short 2 # DWARF Version
|
||||||
|
.long .Lcu_begin1 # Offset of Compilation Unit Info
|
||||||
|
.long 48 # Compilation Unit Length
|
||||||
|
.long 25 # DIE offset
|
||||||
|
.asciz "main" # External Name
|
||||||
|
.long 0 # End Mark
|
||||||
|
.LpubNames_end1:
|
||||||
|
.section .debug_pubtypes,"",@progbits
|
||||||
|
.long .LpubTypes_end0-.LpubTypes_begin0 # Length of Public Types Info
|
||||||
|
.LpubTypes_begin0:
|
||||||
|
.short 2 # DWARF Version
|
||||||
|
.long .Lcu_begin0 # Offset of Compilation Unit Info
|
||||||
|
.long 48 # Compilation Unit Length
|
||||||
|
.long 52 # DIE offset
|
||||||
|
.asciz "int" # External Name
|
||||||
|
.long 0 # End Mark
|
||||||
|
.LpubTypes_end0:
|
||||||
|
.long .LpubTypes_end1-.LpubTypes_begin1 # Length of Public Types Info
|
||||||
|
.LpubTypes_begin1:
|
||||||
|
.short 2 # DWARF Version
|
||||||
|
.long .Lcu_begin1 # Offset of Compilation Unit Info
|
||||||
|
.long 48 # Compilation Unit Length
|
||||||
|
.long 40 # DIE offset
|
||||||
|
.asciz "int" # External Name
|
||||||
|
.long 0 # End Mark
|
||||||
|
.LpubTypes_end1:
|
||||||
|
|
||||||
|
.ident "clang version 5.0.0 (trunk 302855) (llvm/trunk 302853)"
|
||||||
|
.ident "clang version 5.0.0 (trunk 302855) (llvm/trunk 302853)"
|
||||||
|
.section ".note.GNU-stack","",@progbits
|
||||||
|
.section .debug_line,"",@progbits
|
||||||
|
.Lline_table_start0:
|
|
@ -0,0 +1,67 @@
|
||||||
|
# Copyright 2012-2017 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/>.
|
||||||
|
|
||||||
|
load_lib dwarf.exp
|
||||||
|
|
||||||
|
# We run objcopy locally to split out the .dwo file.
|
||||||
|
if [is_remote host] {
|
||||||
|
return 0
|
||||||
|
}
|
||||||
|
|
||||||
|
# This test can only be run on targets which support DWARF-2 and use gas.
|
||||||
|
if ![dwarf2_support] {
|
||||||
|
return 0
|
||||||
|
}
|
||||||
|
|
||||||
|
# This test can only be run on x86-64 targets.
|
||||||
|
if {![istarget x86_64-*] || ![is_lp64_target]} {
|
||||||
|
return 0
|
||||||
|
}
|
||||||
|
|
||||||
|
standard_testfile .S
|
||||||
|
|
||||||
|
if [build_executable_from_fission_assembler \
|
||||||
|
"$testfile.exp" "$binfile" "$srcfile" {nodebug}] {
|
||||||
|
return -1
|
||||||
|
}
|
||||||
|
|
||||||
|
gdb_exit
|
||||||
|
gdb_start
|
||||||
|
gdb_reinitialize_dir $srcdir/$subdir
|
||||||
|
# Make sure we can find the .dwo file, regardless of whether we're
|
||||||
|
# running in parallel mode.
|
||||||
|
gdb_test_no_output "set debug-file-directory [file dirname $binfile]" \
|
||||||
|
"set debug-file-directory"
|
||||||
|
gdb_load $binfile
|
||||||
|
|
||||||
|
if ![runto_main] {
|
||||||
|
return -1
|
||||||
|
}
|
||||||
|
|
||||||
|
# Do a few basic things to verify we're finding the DWO debug info.
|
||||||
|
|
||||||
|
gdb_test "ptype main" "type = int \\(\\)"
|
||||||
|
gdb_test "ptype func" "type = int \\(int\\)"
|
||||||
|
|
||||||
|
gdb_test "frame" "#0 *main \\(\\) at ${testfile}2\\.c:$decimal.*" \
|
||||||
|
"frame in main"
|
||||||
|
|
||||||
|
gdb_test "break func" "Breakpoint.*at.* file .*${testfile}1\\.c, line .*"
|
||||||
|
|
||||||
|
gdb_test "continue" "Breakpoint.* func \\(arg=-1\\).*" \
|
||||||
|
"continue to func"
|
||||||
|
|
||||||
|
gdb_test "frame" "#0 *func \\(arg=-1\\) at ${testfile}1\\.c:$decimal.*" \
|
||||||
|
"frame in func"
|
|
@ -0,0 +1,22 @@
|
||||||
|
/* This testcase is part of GDB, the GNU debugger.
|
||||||
|
|
||||||
|
Copyright 2012-2017 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/>. */
|
||||||
|
|
||||||
|
int
|
||||||
|
func (int arg)
|
||||||
|
{
|
||||||
|
return arg + 1;
|
||||||
|
}
|
|
@ -0,0 +1,24 @@
|
||||||
|
/* This testcase is part of GDB, the GNU debugger.
|
||||||
|
|
||||||
|
Copyright 2012-2017 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/>. */
|
||||||
|
|
||||||
|
void func ();
|
||||||
|
|
||||||
|
int
|
||||||
|
main ()
|
||||||
|
{
|
||||||
|
func (-1);
|
||||||
|
}
|
Loading…
Reference in New Issue