1ea85365b4
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
260 lines
10 KiB
C
260 lines
10 KiB
C
/* Debug hooks for GCC.
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Copyright (C) 2001-2017 Free Software Foundation, Inc.
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This program is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by the
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Free Software Foundation; either version 3, or (at your option) any
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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; see the file COPYING3. If not see
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<http://www.gnu.org/licenses/>. */
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#ifndef GCC_DEBUG_H
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#define GCC_DEBUG_H
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/* This structure contains hooks for the debug information output
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functions, accessed through the global instance debug_hooks set in
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toplev.c according to command line options. */
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struct gcc_debug_hooks
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{
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/* Initialize debug output. MAIN_FILENAME is the name of the main
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input file. */
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void (* init) (const char *main_filename);
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/* Output debug symbols. */
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void (* finish) (const char *main_filename);
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/* Run cleanups necessary after early debug generation. */
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void (* early_finish) (const char *main_filename);
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/* Called from cgraph_optimize before starting to assemble
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functions/variables/toplevel asms. */
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void (* assembly_start) (void);
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/* Macro defined on line LINE with name and expansion TEXT. */
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void (* define) (unsigned int line, const char *text);
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/* MACRO undefined on line LINE. */
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void (* undef) (unsigned int line, const char *macro);
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/* Record the beginning of a new source file FILE from LINE number
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in the previous one. */
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void (* start_source_file) (unsigned int line, const char *file);
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/* Record the resumption of a source file. LINE is the line number
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in the source file we are returning to. */
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void (* end_source_file) (unsigned int line);
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/* Record the beginning of block N, counting from 1 and not
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including the function-scope block, at LINE. */
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void (* begin_block) (unsigned int line, unsigned int n);
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/* Record the end of a block. Arguments as for begin_block. */
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void (* end_block) (unsigned int line, unsigned int n);
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/* Returns nonzero if it is appropriate not to emit any debugging
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information for BLOCK, because it doesn't contain any
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instructions. This may not be the case for blocks containing
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nested functions, since we may actually call such a function even
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though the BLOCK information is messed up. Defaults to true. */
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bool (* ignore_block) (const_tree);
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/* Record a source file location at (FILE, LINE, COLUMN, DISCRIMINATOR). */
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void (* source_line) (unsigned int line, unsigned int column,
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const char *file, int discriminator, bool is_stmt);
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/* Called at start of prologue code. LINE is the first line in the
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function. */
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void (* begin_prologue) (unsigned int line, unsigned int column,
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const char *file);
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/* Called at end of prologue code. LINE is the first line in the
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function. */
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void (* end_prologue) (unsigned int line, const char *file);
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/* Called at beginning of epilogue code. */
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void (* begin_epilogue) (unsigned int line, const char *file);
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/* Record end of epilogue code. */
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void (* end_epilogue) (unsigned int line, const char *file);
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/* Called at start of function DECL, before it is declared. */
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void (* begin_function) (tree decl);
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/* Record end of function. LINE is highest line number in function. */
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void (* end_function) (unsigned int line);
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/* Register UNIT as the main translation unit. Called from front-ends when
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they create their main translation unit. */
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void (* register_main_translation_unit) (tree);
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/* Debug information for a function DECL. This might include the
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function name (a symbol), its parameters, and the block that
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makes up the function's body, and the local variables of the
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function.
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This is only called for FUNCTION_DECLs. It is part of the late
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debug pass and is called from rest_of_handle_final.
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Location information is available at this point.
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See the documentation for early_global_decl and late_global_decl
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for other entry points into the debugging back-ends for DECLs. */
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void (* function_decl) (tree decl);
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/* Debug information for a global DECL. Called from the parser
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after the parsing process has finished.
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This gets called for both variables and functions.
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Location information is not available at this point, but it is a
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good probe point to get access to symbols before they get
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optimized away.
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This hook may be called on VAR_DECLs or FUNCTION_DECLs. It is up
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to the hook to use what it needs. */
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void (* early_global_decl) (tree decl);
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/* Augment debug information generated by early_global_decl with
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more complete debug info (if applicable). Called from toplev.c
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after the compilation proper has finished and cgraph information
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is available.
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This gets called for both variables and functions.
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Location information is usually available at this point, unless
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the hook is being called for a decl that has been optimized away.
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This hook may be called on VAR_DECLs or FUNCTION_DECLs. It is up
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to the hook to use what it needs. */
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void (* late_global_decl) (tree decl);
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/* Debug information for a type DECL. Called from toplev.c after
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compilation proper, also from various language front ends to
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record built-in types. The second argument is properly a
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boolean, which indicates whether or not the type is a "local"
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type as determined by the language. (It's not a boolean for
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legacy reasons.) */
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void (* type_decl) (tree decl, int local);
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/* Debug information for imported modules and declarations. */
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void (* imported_module_or_decl) (tree decl, tree name,
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tree context, bool child,
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bool implicit);
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/* Return true if a DIE for the tree is available and return a symbol
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and offset that can be used to refer to it externally. */
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bool (* die_ref_for_decl) (tree, const char **, unsigned HOST_WIDE_INT *);
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/* Early debug information for the tree is available at symbol plus
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offset externally. */
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void (* register_external_die) (tree, const char *, unsigned HOST_WIDE_INT);
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/* DECL is an inline function, whose body is present, but which is
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not being output at this point. */
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void (* deferred_inline_function) (tree decl);
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/* DECL is an inline function which is about to be emitted out of
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line. The hook is useful to, e.g., emit abstract debug info for
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the inline before it gets mangled by optimization. */
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void (* outlining_inline_function) (tree decl);
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/* Called from final_scan_insn for any CODE_LABEL insn whose
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LABEL_NAME is non-null. */
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void (* label) (rtx_code_label *);
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/* Called after the start and before the end of writing a PCH file.
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The parameter is 0 if after the start, 1 if before the end. */
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void (* handle_pch) (unsigned int);
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/* Called from final_scan_insn for any NOTE_INSN_VAR_LOCATION note. */
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void (* var_location) (rtx_insn *);
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/* Called from finalize_size_functions for size functions so that their body
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can be encoded in the debug info to describe the layout of variable-length
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structures. */
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void (* size_function) (tree decl);
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/* Called from final_scan_insn if there is a switch between hot and cold
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text sections. */
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void (* switch_text_section) (void);
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/* Called from grokdeclarator. Replaces the anonymous name with the
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type name. */
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void (* set_name) (tree, tree);
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/* This is 1 if the debug writer wants to see start and end commands for the
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main source files, and 0 otherwise. */
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int start_end_main_source_file;
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/* The type of symtab field used by these debug hooks. This is one
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of the TYPE_SYMTAB_IS_xxx values defined in tree.h. */
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int tree_type_symtab_field;
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};
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extern const struct gcc_debug_hooks *debug_hooks;
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/* The do-nothing hooks. */
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extern void debug_nothing_void (void);
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extern void debug_nothing_charstar (const char *);
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extern void debug_nothing_int_int_charstar (unsigned int, unsigned int,
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const char *);
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extern void debug_nothing_int_charstar (unsigned int, const char *);
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extern void debug_nothing_int_int_charstar_int_bool (unsigned int,
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unsigned int,
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const char *,
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int, bool);
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extern void debug_nothing_int (unsigned int);
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extern void debug_nothing_int_int (unsigned int, unsigned int);
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extern void debug_nothing_tree (tree);
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extern void debug_nothing_tree_tree (tree, tree);
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extern void debug_nothing_tree_int (tree, int);
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extern void debug_nothing_tree_tree_tree_bool_bool (tree, tree, tree,
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bool, bool);
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extern bool debug_true_const_tree (const_tree);
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extern void debug_nothing_rtx_insn (rtx_insn *);
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extern void debug_nothing_rtx_code_label (rtx_code_label *);
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extern bool debug_false_tree_charstarstar_uhwistar (tree, const char **,
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unsigned HOST_WIDE_INT *);
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extern void debug_nothing_tree_charstar_uhwi (tree, const char *,
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unsigned HOST_WIDE_INT);
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/* Hooks for various debug formats. */
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extern const struct gcc_debug_hooks do_nothing_debug_hooks;
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extern const struct gcc_debug_hooks dbx_debug_hooks;
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extern const struct gcc_debug_hooks sdb_debug_hooks;
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extern const struct gcc_debug_hooks xcoff_debug_hooks;
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extern const struct gcc_debug_hooks dwarf2_debug_hooks;
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extern const struct gcc_debug_hooks dwarf2_lineno_debug_hooks;
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extern const struct gcc_debug_hooks vmsdbg_debug_hooks;
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/* Dwarf2 frame information. */
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extern void dwarf2out_begin_prologue (unsigned int, unsigned int,
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const char *);
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extern void dwarf2out_vms_end_prologue (unsigned int, const char *);
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extern void dwarf2out_vms_begin_epilogue (unsigned int, const char *);
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extern void dwarf2out_end_epilogue (unsigned int, const char *);
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extern void dwarf2out_frame_finish (void);
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/* Decide whether we want to emit frame unwind information for the current
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translation unit. */
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extern bool dwarf2out_do_frame (void);
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extern bool dwarf2out_do_cfi_asm (void);
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extern void dwarf2out_switch_text_section (void);
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const char *remap_debug_filename (const char *);
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void add_debug_prefix_map (const char *);
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/* For -fdump-go-spec. */
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extern const struct gcc_debug_hooks *
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dump_go_spec_init (const char *, const struct gcc_debug_hooks *);
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#endif /* !GCC_DEBUG_H */
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