2019-08-27 Martin Liska <mliska@suse.cz>
PR lto/91478
* simple-object-elf.c (simple_object_elf_copy_lto_debug_sections):
First find a WEAK HIDDEN symbol in symbol table that will be
preserved. Later, use the symbol name for all removed symbols.
From-SVN: r274955
2019-07-22 Martin Liska <mliska@suse.cz>
* config/avr/avr.c (avr_asm_output_aligned_decl_common): Update
comment.
* toplev.c (compile_file): Do not emit __gnu_lto_v1 symbol.
2019-07-22 Martin Liska <mliska@suse.cz>
* config/pa/stublib.c: Remove stub symbol __gnu_lto_v1.
* config/pa/t-stublib: Likewise.
2019-07-22 Martin Liska <mliska@suse.cz>
* simple-object-elf.c (simple_object_elf_copy_lto_debug_sections):
Do not search for gnu_lto_v1, but search for first '\0'.
From-SVN: r273662
2018-01-11 Richard Biener <rguenther@suse.de>
Rainer Orth <ro@CeBiTec.Uni-Bielefeld.DE>
PR lto/81968
libiberty/
* simple-object-common.h (struct simple_object_functions):
Change copy_lto_debug_sections callback signature.
* simple-object-elf.c (SHN_HIRESERVE, SHT_SYMTAB_SHNDX,
SHF_INFO_LINK): Add defines.
(simple_object_elf_copy_lto_debug_sections): Instead of
leaving not to be copied sections empty unnamed SHT_NULL
remove them from the target section headers and adjust section
reference everywhere. Handle SHN_XINDEX in the symbol table
processing properly.
* simple-object.c (handle_lto_debug_sections): Change
interface to return a modified string and handle renaming
of relocation sections.
Co-Authored-By: Rainer Orth <ro@CeBiTec.Uni-Bielefeld.DE>
From-SVN: r256528
2017-01-02 Richard Biener <rguenther@suse.de>
PR lto/83452
* simple-object-elf.c (simple_object_elf_copy_lto_debug_section):
Do not use UNDEF locals for removed symbols but instead just
define them in the first prevailing section and with no name.
Use the same gnu_lto_v1 name for all removed globals we promote to
WEAK UNDEFs so hpux can use a stub to provide this symbol. Clear
sh_info and sh_link in removed sections.
From-SVN: r256069
2017-10-30 Richard Biener <rguenther@suse.de>
PR lto/82757
* simple-object-elf.c (simple_object_elf_copy_lto_debug_sections):
Strip two leading _s from the __gnu_lto_* symbols.
From-SVN: r254219
The problem with making discarded symbols hidden is that the
non-default visibility is sticky. When symbols other than the
__gnu_lto ones are discarded that turns out to be a bad idea.
PR lto/82687
PR lto/82575
* simple-object-elf.c (simple_object_elf_copy_lto_debug_sections):
Only make __gnu_lto symbols hidden. Delete outdated comment.
Silence ISO C warning.
From-SVN: r254042
If __gnu_lto_slim is global, undefined, default visibility in the
early debug object, then it finds its way into .dynsym when creating
shared libraries. __gnu_lto_slim in a symbol table (.dynsym or
.symtab) signals nm and other binutils that the object is an LTO
object needing a plugin, but that isn't the case for the ld liblti-17
tests. So, make __gnu_lto_slim hidden to prevent it becoming
dynamic. Further, make it weak because some linkers may warn on
finding an undefined global non-default visibility symbol.
PR lto/82575
* simple-object-elf.c (simple_object_elf_copy_lto_debug_sections):
Make discarded non-local symbols weak and hidden.
From-SVN: r253914
PR lto/82598
* simple-object.c (handle_lto_debug_sections): Copy over also
.note.GNU-stack section with unchanged name.
* simple-object-elf.c (SHF_EXECINSTR): Define.
(simple_object_elf_copy_lto_debug_section): Drop SHF_EXECINSTR bit
on .note.GNU-stack section.
From-SVN: r253851
2017-08-28 Richard Biener <rguenther@suse.de>
PR lto/81968
* simple-object-elf.c (simple_object_elf_copy_lto_debug_section):
Adjust field with for sh_type write, set SHF_EXCLUDE only for
removed sections.
From-SVN: r251384
2017-08-22 Richard Biener <rguenther@suse.de>
PR lto/81925
* simple-object-elf.c (simple_object_elf_write_shdr): Adjust
type of sh_addralign and sh_entsize and properly write
sh_entsize as Elf_Addr.
(simple_object_elf_write_to_file): Read sh_entsize as Elf_Addr.
From-SVN: r251276
2017-08-21 Richard Biener <rguenther@suse.de>
include/
* simple-object.h (simple_object_copy_lto_debug_sections): New
function.
libiberty/
* simple-object-common.h (struct simple_object_functions): Add
copy_lto_debug_sections hook.
* simple-object.c: Include fcntl.h.
(handle_lto_debug_sections): New helper function.
(simple_object_copy_lto_debug_sections): New function copying
early LTO debug sections to regular debug sections in a new file.
(simple_object_start_write): Handle NULL segment_name.
* simple-object-coff.c (simple_object_coff_functions): Adjust
for not implemented copy_lto_debug_sections hook.
* simple-object-mach-o.c (simple_object_mach_o_functions): Likewise.
* simple-object-xcoff.c (simple_object_xcoff_functions): Likewise.
* simple-object-elf.c (SHT_NULL, SHT_SYMTAB, SHT_RELA, SHT_REL,
SHT_GROUP): Add various sectopn header types.
(SHF_EXCLUDE): Add flag.
(Elf32_External_Sym, Elf64_External_Sym): Add symbol struct.
(ELF_ST_BIND, ELF_ST_TYPE, ELF_ST_INFO): Add accessors.
(STT_OBJECT, STT_FUNC, STT_TLS, STT_GNU_IFUNC): Add Symbol types.
(STV_DEFAULT): Add symbol visibility.
(SHN_COMMON): Add special section index name.
(struct simple_object_elf_write): New.
(simple_object_elf_start_write): Adjust for new private data.
(simple_object_elf_write_shdr): Pass in values for all fields
we write.
(simple_object_elf_write_to_file): Adjust. Copy from recorded
section headers if requested.
(simple_object_elf_release_write): Release private data.
(simple_object_elf_copy_lto_debug_sections): Copy and rename sections
as denoted by PFN and all their dependences, symbols and relocations
to the empty destination file.
(simple_object_elf_functions): Adjust for copy_lto_debug_sections hook.
gcc/
* debug.h (struct gcc_debug_hooks): Add die_ref_for_decl and
register_external_die hooks.
(debug_false_tree_charstarstar_uhwistar): Declare.
(debug_nothing_tree_charstar_uhwi): Likewise.
* debug.c (do_nothing_debug_hooks): Adjust.
(debug_false_tree_charstarstar_uhwistar): New do nothing.
(debug_nothing_tree_charstar_uhwi): Likewise.
* dbxout.c (dbx_debug_hooks): Adjust.
(xcoff_debug_hooks): Likewise.
* sdbout.c (sdb_debug_hooks): Likewise.
* vmsdbgout.c (vmsdbg_debug_hooks): Likewise.
* dwarf2out.c (macinfo_label_base): New global.
(dwarf2out_register_external_die): New function for the
register_external_die hook.
(dwarf2out_die_ref_for_decl): Likewise for die_ref_for_decl.
(dwarf2_debug_hooks): Use them.
(dwarf2_lineno_debug_hooks): Adjust.
(struct die_struct): Add with_offset flag.
(DEBUG_LTO_DWO_INFO_SECTION, DEBUG_LTO_INFO_SECTION,
DEBUG_LTO_DWO_ABBREV_SECTION, DEBUG_LTO_ABBREV_SECTION,
DEBUG_LTO_DWO_MACINFO_SECTION, DEBUG_LTO_MACINFO_SECTION,
DEBUG_LTO_DWO_MACRO_SECTION, DEBUG_LTO_MACRO_SECTION,
DEBUG_LTO_LINE_SECTION, DEBUG_LTO_DWO_STR_OFFSETS_SECTION,
DEBUG_LTO_STR_DWO_SECTION, DEBUG_STR_LTO_SECTION): New macros
defining section names for the early LTO debug variants.
(reset_indirect_string): New helper.
(add_AT_external_die_ref): Helper for dwarf2out_register_external_die.
(print_dw_val): Add support for offsetted symbol references.
(get_ultimate_context): Split out from is_cxx.
(is_cxx): Use get_ultimate_context.
(is_fortran): Add decl overload.
(compute_comp_unit_symbol): Split out worker from
compute_section_prefix.
(compute_section_prefix): Call compute_comp_unit_symbol and
set comdat_type_p here.
(output_die): Skip DIE symbol output for the LTO added one.
Handle DIE symbol references with offset.
(output_comp_unit): Guard section name mangling properly.
For LTO debug sections emit a symbol at the section beginning
which we use to refer to its DIEs.
(add_abstract_origin_attribute): For DIEs registered via
dwarf2out_register_external_die directly refer to the early
DIE rather than indirectly through the shadow one we created.
Remove obsolete call to dwarf2out_abstract_function for
non-function/block origins.
(gen_array_type_die): When generating early LTO debug do
not emit DW_AT_string_length.
(gen_formal_parameter_die): Do not re-create DIEs for PARM_DECLs
late when in LTO. As suggested place a gcc_unreachable for
the DECL_ABSTRACT_P case.
(gen_subprogram_die): Avoid another specification DIE
for early built declarations/definitions for the late LTO case.
(gen_variable_die): Add type references for late duplicated VLA dies
when in late LTO.
(gen_inlined_subroutine_die): Do not call dwarf2out_abstract_function,
we have the abstract instance already.
(process_scope_var): Adjust decl DIE contexts in LTO which
first puts them in limbo.
(gen_decl_die): Do not generate type DIEs late apart from
types for VLAs or for decls we do not yet have a DIE. Do not
call dwarf2out_abstract_function late.
(dwarf2out_early_global_decl): Make sure to create DIEs
for abstract instances of a decl first.
(dwarf2out_late_global_decl): Adjust comment.
(output_macinfo_op): With multiple macro sections use
macinfo_label_base to distinguish labels.
(output_macinfo): Likewise. Update macinfo_label_base.
Pass in the line info label.
(note_variable_value_in_expr): When generating LTO resolve
all variable values here by generating DIEs as needed.
(init_sections_and_labels): Add early LTO debug flag parameter
and generate different sections and names if set. Add generation
counter for the labels so we can have multiple of them.
(reset_dies): Helper to allow DIEs to be output multiple times.
(dwarf2out_finish): When outputting DIEs to the fat part of an
LTO object first reset DIEs.
(dwarf2out_early_finish): Output early DIEs when generating LTO.
(modified_type_die): Check for decl_ultimate_origin being self
before recursing.
(gen_type_die_with_usage): Likewise.
(gen_typedef_die): Allow decl_ultimate_origin being self.
(set_decl_abstract_flags): Remove.
(set_block_abstract_flags): Likewise.
(dwarf2out_abstract_function): Treat the early generated DIEs
as the abstract copy and only add DW_AT_inline and
DW_AT_artificial here and call set_decl_origin_self.
If the DIE has an abstract origin don't do anything.
* tree.c (free_lang_data): Build a dummy TRANSLATION_UNIT_DECL
if we have none yet (Go fails to build one, PR78628).
(variably_modified_type_p): Prevent endless recursion for Ada
cyclic pointer types.
* lto-streamer-in.c: Include debug.h.
(dref_queue): New global.
(lto_read_tree_1): Stream in DIE references.
(lto_input_tree): Register DIE references.
(input_function): Stream DECL_DEBUG_ARGS.
* lto-streamer-out.c: Include debug.h.
(lto_write_tree_1): Output DIE references.
(DFS::DFS_write_tree_body): Follow DECL_ABSTRACT_ORIGIN.
Force a TRANSLATION_UNIT_DECL DECL_CONTEXT for file-scope decls.
(output_function): Stream DECL_DEBUG_ARGS.
* tree-streamer-in.c (lto_input_ts_decl_common_tree_pointers):
Stream DECL_ABSTRACT_ORIGIN.
* tree-streamer-out.c (write_ts_decl_common_tree_pointers): Likewise.
(write_ts_decl_minimal_tree_pointers): Force a TRANSLATION_UNIT_DECL
DECL_CONTEXT for file-scope decls.
* lto-streamer.h (struct dref_entry): Declare.
(dref_queue): Likewise.
* cfgexpand.c (pass_expand::execute): Do not call the
outlining_inline_function hook here.
* lto-wrapper.c (debug_obj): New global.
(tool_cleanup): Unlink it if required.
(debug_objcopy): New function.
(run_gcc): Handle early debug sections in the IL files by
extracting them to separate files, partially linkin them and
feeding the result back as result to the linker.
* config/darwin.h (DEBUG_LTO_INFO_SECTION, DEBUG_LTO_ABBREV_SECTION,
DEBUG_LTO_MACINFO_SECTION, DEBUG_LTO_LINE_SECTION,
DEBUG_STR_LTO_SECTION, DEBUG_LTO_MACRO_SECTION): Put early debug
sections into a separate segment.
* config/darwin.c (darwin_asm_named_section): Handle __GNU_DWARF_LTO
segments.
(darwin_asm_dwarf_section): Likewise.
(darwin_asm_output_dwarf_offset): Likewise.
* config/i386/i386.c (make_resolver_func): Set DECL_IGNORED_P.
lto/
* lto.c (unify_scc): Truncate DIE reference queue for dropped SCCs.
(lto_read_decls): Process TRANSLATION_UNIT_DECLs. Remove
TYPE_DECL debug processing, register DIE references from
prevailing SCCs with the debug machinery.
(lto_section_with_id): Handle LTO debug sections.
libstdc++/
* testsuite/libstdc++-prettyprinters/prettyprinters.exp: Run all
tests with -flto as well if supported.
testsuite/
* c-c++-common/asan/global-overflow-1.c: Adjust diagnostic location
regex to handle the LTO case.
* c-c++-common/asan/heap-overflow-1.c: Likewise.
* c-c++-common/asan/misalign-1.c: Likewise.
* c-c++-common/asan/misalign-2.c: Likewise.
* c-c++-common/asan/null-deref-1.c: Likewise.
* c-c++-common/asan/stack-overflow-1.c: Likewise.
* c-c++-common/asan/strncpy-overflow-1.c: Likewise.
* c-c++-common/asan/use-after-free-1.c: Likewise.
* c-c++-common/asan/alloca_big_alignment.c: Likewise.
* c-c++-common/asan/alloca_detect_custom_size.c: Likewise.
* c-c++-common/asan/alloca_overflow_partial.c: Likewise.
* c-c++-common/asan/alloca_overflow_right.c: Likewise.
* c-c++-common/asan/alloca_underflow_left.c: Likewise.
* g++.dg/asan/large-func-test-1.C: Likewise.
* gfortran.dg/save_6.f90: Add -flto -g variant of save_5.f90.
From-SVN: r251220
* simple-object-elf.c (simple_object_elf_write_ehdr): Correctly
handle objects with more than SHN_LORESERVE sections.
(simple_object_elf_write_shdr): Add sh_link parameter.
(simple_object_elf_write_to_file): Correctly handle objects with
more than SHN_LORESERVE sections.
From-SVN: r215394
