gdb: adjust includes in dwarf2/

For files under the dwarf2 directory:

 - Remove includes that are reported as unused by clangd.
 - Add any include required to ensure that all files include what they
   use.

Change-Id: I2f13d75f18a390df480c6da8bdab1edba1e035e1

gdb/dwarf2/abbrev-cache.c

@@ -17,7 +17,6 @@
    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 
-#include "dwarf2/read.h"
 #include "dwarf2/abbrev-cache.h"
 
 /* Hash function for an abbrev table.  */

gdb/dwarf2/abbrev-cache.h

@@ -21,6 +21,8 @@
 #define GDB_DWARF2_ABBREV_CACHE_H
 
 #include "dwarf2/abbrev.h"
+#include "dwarf2/types.h"
+#include "gdbsupport/gdb-hashtab.h"
 
 /* An abbrev cache holds abbrev tables for easier reuse.  */
 class abbrev_cache

gdb/dwarf2/abbrev.c

@@ -24,9 +24,9 @@
    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 
-#include "dwarf2/read.h"
 #include "dwarf2/abbrev.h"
 #include "dwarf2/leb.h"
+#include "dwarf2/section.h"
 #include "bfd.h"
 
 /* Hash function for an abbrev.  */

gdb/dwarf2/abbrev.h

@@ -27,7 +27,10 @@
 #ifndef GDB_DWARF2_ABBREV_H
 #define GDB_DWARF2_ABBREV_H
 
-#include "hashtab.h"
+#include "dwarf2.h"
+#include "dwarf2/types.h"
+#include "gdbsupport/gdb-hashtab.h"
+#include "gdbsupport/gdb_obstack.h"
 
 struct attr_abbrev
 {

gdb/dwarf2/attribute.h

@@ -29,7 +29,6 @@
 
 #include "dwarf2.h"
 #include "dwarf2/types.h"
-#include <optional>
 
 /* Blocks are a bunch of untyped bytes.  */
 struct dwarf_block

gdb/dwarf2/cooked-index.c

@@ -24,14 +24,17 @@
 #include "cp-support.h"
 #include "c-lang.h"
 #include "ada-lang.h"
+#include "dwarf2/tag.h"
 #include "event-top.h"
 #include "exceptions.h"
+#include "gdbsupport/task-group.h"
 #include "split-name.h"
 #include "observable.h"
 #include "run-on-main-thread.h"
 #include <algorithm>
 #include "gdbsupport/gdb-safe-ctype.h"
 #include "gdbsupport/selftest.h"
+#include "gdbsupport/thread-pool.h"
 #include <chrono>
 #include <unordered_set>
 #include "cli/cli-cmds.h"

gdb/dwarf2/cooked-index.h

@@ -24,22 +24,16 @@
 #include "dwarf2/types.h"
 #include "symtab.h"
 #include "hashtab.h"
-#include "dwarf2/index-common.h"
-#include <string_view>
 #include "quick-symbol.h"
 #include "gdbsupport/gdb_obstack.h"
 #include "addrmap.h"
 #include "gdbsupport/iterator-range.h"
-#include "gdbsupport/thread-pool.h"
 #include "dwarf2/mapped-index.h"
 #include "dwarf2/read.h"
-#include "dwarf2/tag.h"
 #include "dwarf2/abbrev-cache.h"
 #include "dwarf2/parent-map.h"
 #include "gdbsupport/range-chain.h"
-#include "gdbsupport/task-group.h"
 #include "complaints.h"
-#include "run-on-main-thread.h"
 
 #if CXX_STD_THREAD
 #include <mutex>

gdb/dwarf2/dwz.h

@@ -25,6 +25,7 @@
 #include "dwarf2/section.h"
 
 struct dwarf2_per_bfd;
+struct dwarf2_per_objfile;
 
 /* This represents a '.dwz' file.  */
 

gdb/dwarf2/frame-tailcall.c

@@ -22,9 +22,7 @@
 #include "dwarf2/frame-tailcall.h"
 #include "dwarf2/loc.h"
 #include "frame-unwind.h"
-#include "block.h"
 #include "hashtab.h"
-#include "gdbtypes.h"
 #include "regcache.h"
 #include "value.h"
 #include "dwarf2/frame.h"

gdb/dwarf2/frame.c

@@ -25,7 +25,6 @@
 #include "frame.h"
 #include "frame-base.h"
 #include "frame-unwind.h"
-#include "gdbcore.h"
 #include "gdbtypes.h"
 #include "symtab.h"
 #include "objfiles.h"
@@ -37,7 +36,6 @@
 #include "dwarf2/frame.h"
 #include "dwarf2/read.h"
 #include "dwarf2/public.h"
-#include "ax.h"
 #include "dwarf2/loc.h"
 #include "dwarf2/frame-tailcall.h"
 #include "gdbsupport/gdb_binary_search.h"

gdb/dwarf2/index-cache.c

@@ -28,8 +28,6 @@
 #include "dwarf2/index-write.h"
 #include "dwarf2/read.h"
 #include "dwarf2/dwz.h"
-#include "objfiles.h"
-#include "gdbsupport/selftest.h"
 #include <string>
 #include <stdlib.h>
 #include "run-on-main-thread.h"

gdb/dwarf2/index-cache.h

@@ -20,9 +20,7 @@
 #ifndef DWARF_INDEX_CACHE_H
 #define DWARF_INDEX_CACHE_H
 
-#include "dwarf2/index-common.h"
 #include "gdbsupport/array-view.h"
-#include "symfile.h"
 
 class dwarf2_per_bfd;
 class index_cache;

gdb/dwarf2/index-write.c

@@ -28,7 +28,6 @@
 #include "gdbsupport/gdb_unlinker.h"
 #include "gdbsupport/pathstuff.h"
 #include "gdbsupport/scoped_fd.h"
-#include "complaints.h"
 #include "dwarf2/index-common.h"
 #include "dwarf2/cooked-index.h"
 #include "dwarf2.h"
@@ -43,10 +42,7 @@
 #include "dwarf2/read-debug-names.h"
 
 #include <algorithm>
-#include <cmath>
-#include <forward_list>
 #include <map>
-#include <set>
 #include <unordered_map>
 #include <unordered_set>
 

gdb/dwarf2/line-header.h

@@ -20,6 +20,8 @@
 #ifndef DWARF2_LINE_HEADER_H
 #define DWARF2_LINE_HEADER_H
 
+#include "dwarf2/types.h"
+
 /* dir_index is 1-based in DWARF 4 and before, and is 0-based in DWARF 5 and
    later.  */
 typedef int dir_index;
@@ -213,7 +215,7 @@ file_entry::include_dir (const line_header *lh) const
    and must not be freed.  */
 
 extern line_header_up dwarf_decode_line_header
-  (sect_offset sect_off, bool is_dwz, dwarf2_per_objfile *per_objfile,
+  (sect_offset sect_off, bool is_dwz, struct dwarf2_per_objfile *per_objfile,
    struct dwarf2_section_info *section, const struct comp_unit_head *cu_header,
    const char *comp_dir);
 

gdb/dwarf2/loc.c

@@ -41,7 +41,6 @@
 #include "dwarf2/frame.h"
 #include "dwarf2/leb.h"
 #include "compile/compile.h"
-#include "gdbsupport/selftest.h"
 #include <algorithm>
 #include <vector>
 #include <unordered_set>

gdb/dwarf2/macro.h

@@ -21,16 +21,20 @@
 #define GDB_DWARF2_MACRO_H
 
 struct buildsym_compunit;
+struct dwarf2_cu;
+struct dwarf2_per_objfile;
+struct dwarf2_section_info;
+struct line_header;
 
 extern void dwarf_decode_macros (dwarf2_per_objfile *per_objfile,
 				 buildsym_compunit *builder,
 				 const dwarf2_section_info *section,
-				 const struct line_header *lh,
+				 const line_header *lh,
 				 unsigned int offset_size,
 				 unsigned int offset,
 				 dwarf2_section_info *str_section,
 				 dwarf2_section_info *str_offsets_section,
 				 std::optional<ULONGEST> str_offsets_base,
-				 int section_is_gnu, struct dwarf2_cu *cu);
+				 int section_is_gnu, dwarf2_cu *cu);
 
 #endif /* GDB_DWARF2_MACRO_H */

gdb/dwarf2/mapped-index.h

@@ -20,7 +20,9 @@
 #ifndef GDB_DWARF2_MAPPED_INDEX_H
 #define GDB_DWARF2_MAPPED_INDEX_H
 
+#include "dwarf2/index-common.h"
 #include "language.h"
+#include "quick-symbol.h"
 
 /* An index into a (C++) symbol name component in a symbol name as
    recorded in the mapped_index's symbol table.  For each C++ symbol

gdb/dwarf2/parent-map.h

@@ -20,7 +20,9 @@
 #ifndef GDB_DWARF2_PARENT_MAP_H
 #define GDB_DWARF2_PARENT_MAP_H
 
-#include <algorithm>
+#include "addrmap.h"
+#include "dwarf2/types.h"
+#include "gdbsupport/gdb_obstack.h"
 
 class cooked_index_entry;
 

gdb/dwarf2/read.c

@@ -48,6 +48,7 @@
 #include "bfd.h"
 #include "elf-bfd.h"
 #include "event-top.h"
+#include "gdbsupport/task-group.h"
 #include "symtab.h"
 #include "gdbtypes.h"
 #include "objfiles.h"
@@ -70,7 +71,6 @@
 #include "go-lang.h"
 #include "valprint.h"
 #include "gdbcore.h"
-#include "gdb/gdb-index.h"
 #include "gdb_bfd.h"
 #include "f-lang.h"
 #include "source.h"
@@ -92,7 +92,6 @@
 #include <unordered_set>
 #include "dwarf2/abbrev-cache.h"
 #include "cooked-index.h"
-#include "split-name.h"
 #include "gdbsupport/thread-pool.h"
 #include "run-on-main-thread.h"
 #include "dwarf2/parent-map.h"

gdb/dwarf2/read.h

@@ -28,7 +28,6 @@
 #include "dwarf2/mapped-index.h"
 #include "dwarf2/section.h"
 #include "dwarf2/cu.h"
-#include "filename-seen-cache.h"
 #include "gdbsupport/gdb_obstack.h"
 #include "gdbsupport/hash_enum.h"
 #include "gdbsupport/function-view.h"