enum language pretend_language;
};
-/* Collection of data recorded per objfile.
- This hangs off of dwarf2_objfile_data_key. */
+/* Some DWARF data can be shared across objfiles who share the same BFD,
+ this data is stored in this object.
-struct dwarf2_per_objfile
+ Two dwarf2_per_objfile objects representing objfiles sharing the same BFD
+ will point to the same instance of dwarf2_per_bfd, unless the BFD requires
+ relocation. */
+
+struct dwarf2_per_bfd
{
- /* Construct a dwarf2_per_objfile for OBJFILE. NAMES points to the
+ /* Construct a dwarf2_per_bfd for OBFD. NAMES points to the
dwarf2 section names, or is NULL if the standard ELF names are
used. CAN_COPY is true for formats where symbol
interposition is possible and so symbol values must follow copy
relocation rules. */
- dwarf2_per_objfile (struct objfile *objfile,
- const dwarf2_debug_sections *names,
- bool can_copy);
+ dwarf2_per_bfd (bfd *obfd, const dwarf2_debug_sections *names, bool can_copy);
- ~dwarf2_per_objfile ();
+ ~dwarf2_per_bfd ();
- DISABLE_COPY_AND_ASSIGN (dwarf2_per_objfile);
+ DISABLE_COPY_AND_ASSIGN (dwarf2_per_bfd);
/* Return the CU/TU given its index.
This is intended for loops like:
- for (i = 0; i < (dwarf2_per_objfile->n_comp_units
- + dwarf2_per_objfile->n_type_units); ++i)
+ for (i = 0; i < (dwarf2_per_bfd->n_comp_units
+ + dwarf2_per_bfd->n_type_units); ++i)
{
- dwarf2_per_cu_data *per_cu = dwarf2_per_objfile->get_cutu (i);
+ dwarf2_per_cu_data *per_cu = dwarf2_per_bfd->get_cutu (i);
...;
}
/* Free all cached compilation units. */
void free_cached_comp_units ();
+
+ /* A convenience function to allocate a dwarf2_per_cu_data. The
+ returned object has its "index" field set properly. The object
+ is allocated on the dwarf2_per_bfd obstack. */
+ dwarf2_per_cu_data *allocate_per_cu ();
+
+ /* A convenience function to allocate a signatured_type. The
+ returned object has its "index" field set properly. The object
+ is allocated on the dwarf2_per_bfd obstack. */
+ signatured_type *allocate_signatured_type ();
+
+ /* Return the number of partial symtabs allocated with allocate_per_cu
+ and allocate_signatured_type so far. */
+ int num_psymtabs () const
+ { return m_num_psymtabs; }
+
private:
/* This function is mapped across the sections and remembers the
offset and size of each of the debugging sections we are
const dwarf2_debug_sections &names);
public:
+ /* Objects that can be shared across objfiles are stored in this
+ obstack or on the psymtab obstack, while objects that are
+ objfile-specific are stored on the objfile obstack. */
+ auto_obstack obstack;
+
dwarf2_section_info info {};
dwarf2_section_info abbrev {};
dwarf2_section_info line {};
std::vector<dwarf2_section_info> types;
- /* Back link. */
- struct objfile *objfile = NULL;
-
/* Table of all the compilation units. This is used to locate
the target compilation unit of a particular reference. */
std::vector<dwarf2_per_cu_data *> all_comp_units;
symbols. */
bool reading_partial_symbols = false;
- /* Table mapping type DIEs to their struct type *.
- This is NULL if not allocated yet.
- The mapping is done via (CU/TU + DIE offset) -> type. */
- htab_up die_type_hash;
-
/* The CUs we recently read. */
std::vector<dwarf2_per_cu_data *> just_read_cus;
/* CUs that are queued to be read. */
std::queue<dwarf2_queue_item> queue;
+
+private:
+
+ /* The total number of per_cu and signatured_type objects that have
+ been created so far for this reader. */
+ size_t m_num_psymtabs = 0;
};
-/* Get the dwarf2_per_objfile associated to OBJFILE. */
+/* Collection of data recorded per objfile.
+ This hangs off of dwarf2_objfile_data_key.
-dwarf2_per_objfile *get_dwarf2_per_objfile (struct objfile *objfile);
+ Some DWARF data cannot (currently) be shared across objfiles. Such
+ data is stored in this object. */
-/* A partial symtab specialized for DWARF. */
-struct dwarf2_psymtab : public standard_psymtab
+struct dwarf2_per_objfile
{
- dwarf2_psymtab (const char *filename, struct objfile *objfile)
- : standard_psymtab (filename, objfile)
+ dwarf2_per_objfile (struct objfile *objfile, dwarf2_per_bfd *per_bfd)
+ : objfile (objfile), per_bfd (per_bfd)
+ {}
+
+ /* Return pointer to string at .debug_line_str offset as read from BUF.
+ BUF is assumed to be in a compilation unit described by CU_HEADER.
+ Return *BYTES_READ_PTR count of bytes read from BUF. */
+ const char *read_line_string (const gdb_byte *buf,
+ const struct comp_unit_head *cu_header,
+ unsigned int *bytes_read_ptr);
+
+ /* Resize the M_SYMTABS vector to the needed size (the number of partial
+ symtabs allocated by the per-bfd). */
+ void resize_symtabs ()
{
+ /* The symtabs vector should only grow, not shrink. */
+ gdb_assert (per_bfd->num_psymtabs () >= m_symtabs.size ());
+
+ m_symtabs.resize (per_bfd->num_psymtabs ());
}
+ /* Return true if the symtab corresponding to PER_CU has been set,
+ false otherwise. */
+ bool symtab_set_p (const dwarf2_per_cu_data *per_cu) const;
+
+ /* Return the compunit_symtab associated to PER_CU, if it has been created. */
+ compunit_symtab *get_symtab (const dwarf2_per_cu_data *per_cu) const;
+
+ /* Set the compunit_symtab associated to PER_CU. */
+ void set_symtab (const dwarf2_per_cu_data *per_cu, compunit_symtab *symtab);
+
+ /* Back link. */
+ struct objfile *objfile;
+
+ /* Pointer to the data that is (possibly) shared between this objfile and
+ other objfiles backed by the same BFD. */
+ struct dwarf2_per_bfd *per_bfd;
+
+ /* Table mapping type DIEs to their struct type *.
+ This is nullptr if not allocated yet.
+ The mapping is done via (CU/TU + DIE offset) -> type. */
+ htab_up die_type_hash;
+
+private:
+ /* Hold the corresponding compunit_symtab for each CU or TU. This
+ is indexed by dwarf2_per_cu_data::index. A NULL value means
+ that the CU/TU has not been expanded yet. */
+ std::vector<compunit_symtab *> m_symtabs;
+};
+
+/* Get the dwarf2_per_objfile associated to OBJFILE. */
+
+dwarf2_per_objfile *get_dwarf2_per_objfile (struct objfile *objfile);
+
+/* A partial symtab specialized for DWARF. */
+struct dwarf2_psymtab : public partial_symtab
+{
dwarf2_psymtab (const char *filename, struct objfile *objfile,
- CORE_ADDR addr)
- : standard_psymtab (filename, objfile, addr)
+ dwarf2_per_cu_data *per_cu)
+ : partial_symtab (filename, objfile, 0),
+ per_cu_data (per_cu)
{
}
void read_symtab (struct objfile *) override;
void expand_psymtab (struct objfile *) override;
+ bool readin_p (struct objfile *) const override;
+ compunit_symtab *get_compunit_symtab (struct objfile *) const override;
struct dwarf2_per_cu_data *per_cu_data;
};
This flag is only valid if is_debug_types is true. */
unsigned int tu_read : 1;
+ /* Our index in the unshared "symtabs" vector. */
+ unsigned index;
+
/* The section this CU/TU lives in.
If the DIE refers to a DWO file, this is always the original die,
not the DWO file. */
dummy CUs (a CU header, but nothing else). */
struct dwarf2_cu *cu;
+ /* The unit type of this CU. */
+ enum dwarf_unit_type unit_type;
+
+ /* The language of this CU. */
+ enum language lang;
+
/* The corresponding dwarf2_per_objfile. */
struct dwarf2_per_objfile *dwarf2_per_objfile;
- /* When dwarf2_per_objfile->using_index is true, the 'quick' field
+ /* Backlink to the owner of this. */
+ dwarf2_per_bfd *per_bfd;
+
+ /* When dwarf2_per_bfd::using_index is true, the 'quick' field
is active. Otherwise, the 'psymtab' field is active. */
union
{
struct dwo_unit *dwo_unit;
};
-/* This represents a '.dwz' file. */
-
-struct dwz_file
-{
- dwz_file (gdb_bfd_ref_ptr &&bfd)
- : dwz_bfd (std::move (bfd))
- {
- }
-
- const char *filename () const
- {
- return bfd_get_filename (this->dwz_bfd.get ());
- }
-
- /* A dwz file can only contain a few sections. */
- struct dwarf2_section_info abbrev {};
- struct dwarf2_section_info info {};
- struct dwarf2_section_info str {};
- struct dwarf2_section_info line {};
- struct dwarf2_section_info macro {};
- struct dwarf2_section_info gdb_index {};
- struct dwarf2_section_info debug_names {};
-
- /* The dwz's BFD. */
- gdb_bfd_ref_ptr dwz_bfd;
-
- /* If we loaded the index from an external file, this contains the
- resources associated to the open file, memory mapping, etc. */
- std::unique_ptr<index_cache_resource> index_cache_res;
-};
-
/* Open the separate '.dwz' debug file, if needed. Return NULL if
there is no .gnu_debugaltlink section in the file. Error if there
is such a section but the file cannot be found. */
projects / thirdparty / binutils-gdb.git / blobdiff