Introduce dwarf2/dwz.h

This moves "struct dwz_file" to a new header file, dwarf2/dwz.h.

gdb/ChangeLog
2020-03-26  Tom Tromey  <tom@tromey.com>

	* dwarf2/read.h (struct dwz_file): Move to dwz.h.
	* dwarf2/read.c: Add include.
	* dwarf2/index-write.c: Add include.
	* dwarf2/index-cache.c: Add include.
	* dwarf2/dwz.h: New file.

6 files changed, 69 insertions, 31 deletions

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 1ee58a5..cafe90e 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,11 @@
+2020-03-26  Tom Tromey  <tom@tromey.com>
+
+	* dwarf2/read.h (struct dwz_file): Move to dwz.h.
+	* dwarf2/read.c: Add include.
+	* dwarf2/index-write.c: Add include.
+	* dwarf2/index-cache.c: Add include.
+	* dwarf2/dwz.h: New file.
+
 2020-03-25  Tom Tromey  <tom@tromey.com>
 
 	* compile/compile-object-load.c (get_out_value_type): Mention
diff --git a/gdb/dwarf2/dwz.h b/gdb/dwarf2/dwz.h
new file mode 100644
index 0000000..94b84eb
--- /dev/null
+++ b/gdb/dwarf2/dwz.h
@@ -0,0 +1,58 @@
+/* DWARF DWZ handling for GDB.
+
+   Copyright (C) 2003-2020 Free Software Foundation, Inc.
+
+   This file is part of GDB.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+#ifndef GDB_DWARF2_DWZ_H
+#define GDB_DWARF2_DWZ_H
+
+#include "gdb_bfd.h"
+#include "dwarf2/index-cache.h"
+#include "dwarf2/section.h"
+
+/* 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;
+};
+
+#endif /* GDB_DWARF2_DWZ_H */
diff --git a/gdb/dwarf2/index-cache.c b/gdb/dwarf2/index-cache.c
index 7b4d9975..62fbe2a 100644
--- a/gdb/dwarf2/index-cache.c
+++ b/gdb/dwarf2/index-cache.c
@@ -27,6 +27,7 @@
 #include "gdbsupport/pathstuff.h"
 #include "dwarf2/index-write.h"
 #include "dwarf2/read.h"
+#include "dwarf2/dwz.h"
 #include "objfiles.h"
 #include "gdbsupport/selftest.h"
 #include <string>
diff --git a/gdb/dwarf2/index-write.c b/gdb/dwarf2/index-write.c
index 4b711d0..8c933dc 100644
--- a/gdb/dwarf2/index-write.c
+++ b/gdb/dwarf2/index-write.c
@@ -32,6 +32,7 @@
 #include "dwarf2/index-common.h"
 #include "dwarf2.h"
 #include "dwarf2/read.h"
+#include "dwarf2/dwz.h"
 #include "gdb/gdb-index.h"
 #include "gdbcmd.h"
 #include "objfiles.h"
diff --git a/gdb/dwarf2/read.c b/gdb/dwarf2/read.c
index 0e879e0..57ef242 100644
--- a/gdb/dwarf2/read.c
+++ b/gdb/dwarf2/read.c
@@ -37,6 +37,7 @@
 #include "dwarf2/index-common.h"
 #include "dwarf2/leb.h"
 #include "dwarf2/line-header.h"
+#include "dwarf2/dwz.h"
 #include "bfd.h"
 #include "elf-bfd.h"
 #include "symtab.h"
diff --git a/gdb/dwarf2/read.h b/gdb/dwarf2/read.h
index f0e3d6b..c5a8ecf 100644
--- a/gdb/dwarf2/read.h
+++ b/gdb/dwarf2/read.h
@@ -491,37 +491,6 @@ struct signatured_type
   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.  */