gdb: include gdb_wait.h in gdb_wait.c

[deliverable/binutils-gdb.git] / gdb / objfiles.h

diff --git a/gdb/objfiles.h b/gdb/objfiles.h
index 1601cfe591f0b4d7031555e9d67f0b2faac0dd7b..1301f2c23fd215c64bd35bb9a27707d41a02e96c 100644 (file)
--- a/gdb/objfiles.h
+++ b/gdb/objfiles.h
@@ -1,6 +1,6 @@
 /* Definitions for symbol file management in GDB.
 
-   Copyright (C) 1992-2019 Free Software Foundation, Inc.
+   Copyright (C) 1992-2020 Free Software Foundation, Inc.
 
    This file is part of GDB.
 
@@ -28,12 +28,14 @@
 #include "registry.h"
 #include "gdb_bfd.h"
 #include "psymtab.h"
+#include <atomic>
 #include <bitset>
 #include <vector>
 #include "gdbsupport/next-iterator.h"
 #include "gdbsupport/safe-iterator.h"
 #include "bcache.h"
 #include "gdbarch.h"
+#include "gdbsupport/refcounted-object.h"
 
 struct htab;
 struct objfile_data;
@@ -139,7 +141,7 @@ struct obj_section
 
 /* Relocation offset applied to S.  */
 #define obj_section_offset(s)                                          \
-  (((s)->objfile->section_offsets)->offsets[gdb_bfd_section_index ((s)->objfile->obfd, (s)->the_bfd_section)])
+  (((s)->objfile->section_offsets)[gdb_bfd_section_index ((s)->objfile->obfd, (s)->the_bfd_section)])
 
 /* The memory address of section S (vma + offset).  */
 #define obj_section_addr(s)                                            \
@@ -394,9 +396,29 @@ private:
 
 struct objfile
 {
+private:
+
+  /* The only way to create an objfile is to call objfile::make.  */
   objfile (bfd *, const char *, objfile_flags);
+
+public:
+
+  /* Normally you should not call delete.  Instead, call 'unlink' to
+     remove it from the program space's list.  In some cases, you may
+     need to hold a reference to an objfile that is independent of its
+     existence on the program space's list; for this case, the
+     destructor must be public so that shared_ptr can reference
+     it.  */
   ~objfile ();
 
+  /* Create an objfile.  */
+  static objfile *make (bfd *bfd_, const char *name_, objfile_flags flags_,
+                       objfile *parent = nullptr);
+
+  /* Remove an objfile from the current program space, and free
+     it.  */
+  void unlink ();
+
   DISABLE_COPY_AND_ASSIGN (objfile);
 
   /* A range adapter that makes it possible to iterate over all
@@ -471,12 +493,6 @@ struct objfile
   }
 
 
-  /* All struct objfile's are chained together by their next pointers.
-     The program space field "objfiles"  (frequently referenced via
-     the macro "object_files") points to the first link in this chain.  */
-
-  struct objfile *next = nullptr;
-
   /* The object file's original name as specified by the user,
      made absolute, and tilde-expanded.  However, it is not canonicalized
      (i.e., it has not been passed through gdb_realpath).
@@ -502,7 +518,7 @@ struct objfile
 
   /* The partial symbol tables.  */
 
-  std::shared_ptr<psymtab_storage> partial_symtabs;
+  std::unique_ptr<psymtab_storage> partial_symtabs;
 
   /* The object file's BFD.  Can be null if the objfile contains only
      minimal symbols, e.g. the run time common symbols for SunOS4.  */
@@ -544,14 +560,12 @@ struct objfile
   /* Set of relocation offsets to apply to each section.
      The table is indexed by the_bfd_section->index, thus it is generally
      as large as the number of sections in the binary.
-     The table is stored on the objfile_obstack.
 
      These offsets indicate that all symbols (including partial and
      minimal symbols) which have been read have been relocated by this
      much.  Symbols which are yet to be read need to be relocated by it.  */
 
-  struct section_offsets *section_offsets = nullptr;
-  int num_sections = 0;
+  ::section_offsets section_offsets;
 
   /* Indexes in the section_offsets array.  These are initialized by the
      *_symfile_offsets() family of functions (som_symfile_offsets,
@@ -627,6 +641,20 @@ struct objfile
   htab_up static_links;
 };
 
+/* A deleter for objfile.  */
+
+struct objfile_deleter
+{
+  void operator() (objfile *ptr) const
+  {
+    ptr->unlink ();
+  }
+};
+
+/* A unique pointer that holds an objfile.  */
+
+typedef std::unique_ptr<objfile, objfile_deleter> objfile_up;
+
 /* Declarations for functions defined in objfiles.c */
 
 extern struct gdbarch *get_objfile_arch (const struct objfile *);
@@ -637,13 +665,9 @@ extern CORE_ADDR entry_point_address (void);
 
 extern void build_objfile_section_table (struct objfile *);
 
-extern void add_separate_debug_objfile (struct objfile *, struct objfile *);
-
 extern void free_objfile_separate_debug (struct objfile *);
 
-extern void free_all_objfiles (void);
-
-extern void objfile_relocate (struct objfile *, const struct section_offsets *);
+extern void objfile_relocate (struct objfile *, const section_offsets &);
 extern void objfile_rebase (struct objfile *, CORE_ADDR);
 
 extern int objfile_has_partial_symbols (struct objfile *objfile);
@@ -746,10 +770,6 @@ extern void default_iterate_over_objfiles_in_search_order
    uninitialized section index.  */
 #define SECT_OFF_BSS(objfile) (objfile)->sect_index_bss
 
-/* Answer whether there is more than one object file loaded.  */
-
-#define MULTI_OBJFILE_P() (object_files && object_files->next)
-
 /* Reset the per-BFD storage area on OBJ.  */
 
 void set_objfile_per_bfd (struct objfile *obj);