+ DISABLE_COPY_AND_ASSIGN (psymtab_storage);
+
+ /* Discard all partial symbol tables starting with "psymtabs" and
+ proceeding until "to" has been discarded. */
+
+ void discard_psymtabs_to (struct partial_symtab *to)
+ {
+ while (psymtabs != to)
+ discard_psymtab (psymtabs);
+ }
+
+ /* Discard the partial symbol table. */
+
+ void discard_psymtab (struct partial_symtab *pst);
+
+ /* Return the obstack that is used for storage by this object. */
+
+ struct obstack *obstack ()
+ {
+ if (!m_obstack.has_value ())
+ m_obstack.emplace ();
+ return &*m_obstack;
+ }
+
+ /* Allocate storage for the "dependencies" field of a psymtab.
+ NUMBER says how many dependencies there are. */
+
+ struct partial_symtab **allocate_dependencies (int number)
+ {
+ return OBSTACK_CALLOC (obstack (), number, struct partial_symtab *);
+ }
+
+ /* Install a psymtab on the psymtab list. This transfers ownership
+ of PST to this object. */
+
+ void install_psymtab (partial_symtab *pst);
+
+ typedef next_adapter<struct partial_symtab> partial_symtab_range;
+
+ /* A range adapter that makes it possible to iterate over all
+ psymtabs in one objfile. */
+
+ partial_symtab_range range ()
+ {
+ return partial_symtab_range (psymtabs);
+ }
+
+
+ /* Each objfile points to a linked list of partial symtabs derived from
+ this file, one partial symtab structure for each compilation unit
+ (source file). */
+
+ struct partial_symtab *psymtabs = nullptr;
+
+ /* Map addresses to the entries of PSYMTABS. It would be more efficient to
+ have a map per the whole process but ADDRMAP cannot selectively remove
+ its items during FREE_OBJFILE. This mapping is already present even for
+ PARTIAL_SYMTABs which still have no corresponding full SYMTABs read.
+
+ The DWARF parser reuses this addrmap to store things other than
+ psymtabs in the cases where debug information is being read from, for
+ example, the .debug-names section. */
+
+ struct addrmap *psymtabs_addrmap = nullptr;
+
+ /* A byte cache where we can stash arbitrary "chunks" of bytes that
+ will not change. */
+
+ psymbol_bcache psymbol_cache;
+
+private:
+
+ /* The obstack where allocations are made. This is lazily allocated
+ so that we don't waste memory when there are no psymtabs. */
+
+ gdb::optional<auto_obstack> m_obstack;
+};