diff options
Diffstat (limited to 'gdb/dwarf2/read.h')
| -rw-r--r-- | gdb/dwarf2/read.h | 123 |
1 files changed, 102 insertions, 21 deletions
diff --git a/gdb/dwarf2/read.h b/gdb/dwarf2/read.h index 4e3f8d7..2f9ad05 100644 --- a/gdb/dwarf2/read.h +++ b/gdb/dwarf2/read.h @@ -54,6 +54,7 @@ struct dwarf2_cu; struct dwarf2_debug_sections; struct dwarf2_per_bfd; struct dwarf2_per_cu; +struct file_entry; struct mapped_index; struct mapped_debug_names; struct signatured_type; @@ -127,7 +128,6 @@ struct dwarf2_per_cu lto_artificial (false), queued (false), m_header_read_in (false), - mark (false), files_read (false), scanned (false), section (section), @@ -195,10 +195,6 @@ public: it private at the moment. */ mutable packed<bool, 1> m_header_read_in; - /* A temporary mark bit used when iterating over all CUs in - expand_symtabs_matching. */ - packed<unsigned int, 1> mark; - /* True if we've tried to read the file table. There will be no point in trying to read it again next time. */ packed<bool, 1> files_read; @@ -673,6 +669,36 @@ public: std::string captured_debug_dir; }; +/* Scoped object to remove all units from PER_BFD and clear other associated + fields in case of failure. */ + +struct scoped_remove_all_units +{ + explicit scoped_remove_all_units (dwarf2_per_bfd &per_bfd) + : m_per_bfd (&per_bfd) + {} + + DISABLE_COPY_AND_ASSIGN (scoped_remove_all_units); + + ~scoped_remove_all_units () + { + if (m_per_bfd == nullptr) + return; + + m_per_bfd->all_units.clear (); + m_per_bfd->num_comp_units = 0; + m_per_bfd->num_type_units = 0; + } + + /* Disable this object. Call this to keep the units of M_PER_BFD on the + success path. */ + void disable () { m_per_bfd = nullptr; } + +private: + /* This is nullptr if the object is disabled. */ + dwarf2_per_bfd *m_per_bfd; +}; + /* An iterator for all_units that is based on index. This approach makes it possible to iterate over all_units safely, when some caller in the loop may add new units. */ @@ -1192,25 +1218,44 @@ struct dwarf2_base_index_functions : public quick_symbol_functions bool need_fullname) override; }; -/* If FILE_MATCHER is NULL or if PER_CU has - dwarf2_per_cu_quick_data::MARK set (see - dw_expand_symtabs_matching_file_matcher), expand the CU and call - EXPANSION_NOTIFY on it. */ +/* This is used to track whether a CU has already been visited during + symbol expansion. It is an auto-resizing bool vector. */ +class auto_bool_vector +{ +public: -extern bool dw2_expand_symtabs_matching_one - (dwarf2_per_cu *per_cu, - dwarf2_per_objfile *per_objfile, - expand_symtabs_file_matcher file_matcher, - expand_symtabs_expansion_listener expansion_notify, - expand_symtabs_lang_matcher lang_matcher); + auto_bool_vector () = default; + + /* Return true if element I is set. */ + bool is_set (size_t i) const + { + if (i < m_vec.size ()) + return m_vec[i]; + return false; + } + + /* Set a value in this vector, growing it automatically. */ + void set (size_t i, bool value) + { + if (m_vec.size () < i + 1) + m_vec.resize (i + 1); + m_vec[i] = value; + } + +private: + std::vector<bool> m_vec; +}; -/* If FILE_MATCHER is non-NULL, set all the - dwarf2_per_cu_quick_data::MARK of the current DWARF2_PER_OBJFILE - that match FILE_MATCHER. */ +/* If FILE_MATCHER is NULL and if CUS_TO_SKIP does not include the + CU's index, expand the CU and call LISTENER on it. */ -extern void dw_expand_symtabs_matching_file_matcher - (dwarf2_per_objfile *per_objfile, - expand_symtabs_file_matcher file_matcher); +extern bool dw2_search_one + (dwarf2_per_cu *per_cu, + dwarf2_per_objfile *per_objfile, + auto_bool_vector &cus_to_skip, + search_symtabs_file_matcher file_matcher, + search_symtabs_expansion_listener listener, + search_symtabs_lang_matcher lang_matcher); /* Return pointer to string at .debug_str offset STR_OFFSET. */ @@ -1321,4 +1366,40 @@ extern file_and_directory &find_file_and_directory (die_info *die, extern const dwarf2_section_info &get_section_for_ref (const attribute &attr, dwarf2_cu *cu); +/* A convenience function to find the proper .debug_line section for a CU. */ + +extern struct dwarf2_section_info *get_debug_line_section + (struct dwarf2_cu *cu); + +/* Start a subfile for DWARF. FILENAME is the name of the file and + DIRNAME the name of the source directory which contains FILENAME + or NULL if not known. + This routine tries to keep line numbers from identical absolute and + relative file names in a common subfile. + + Using the `list' example from the GDB testsuite, which resides in + /srcdir and compiling it with Irix6.2 cc in /compdir using a filename + of /srcdir/list0.c yields the following debugging information for list0.c: + + DW_AT_name: /srcdir/list0.c + DW_AT_comp_dir: /compdir + files.files[0].name: list0.h + files.files[0].dir: /srcdir + files.files[1].name: list0.c + files.files[1].dir: /srcdir + + The line number information for list0.c has to end up in a single + subfile, so that `break /srcdir/list0.c:1' works as expected. + start_subfile will ensure that this happens provided that we pass the + concatenation of files.files[1].dir and files.files[1].name as the + subfile's name. */ +extern void dwarf2_start_subfile (dwarf2_cu *cu, const file_entry &fe, + const line_header &lh); + +/* A helper function that decides if a given symbol is an Ada Pragma + Import or Pragma Export. */ + +extern bool is_ada_import_or_export (dwarf2_cu *cu, const char *name, + const char *linkagename); + #endif /* GDB_DWARF2_READ_H */ |