[PATCH v3 2/5] [gdb] Add section_addrmap

[Tom de Vries <tdevries@suse.de>]

Add a function section_addrmap that returns an addrmap that maps addresses to
sections, mapping the same way as find_pc_section does.
---
 gdb/objfiles.c | 27 +++++++++++++++++++++++++++
 gdb/objfiles.h |  6 ++++++
 2 files changed, 33 insertions(+)

diff --git a/gdb/objfiles.c b/gdb/objfiles.c
index 453397c4f43..2b03f424756 100644
--- a/gdb/objfiles.c
+++ b/gdb/objfiles.c
@@ -984,6 +984,33 @@ find_pc_section (CORE_ADDR pc)
   return NULL;
 }
 
+/* See objfiles.h.  */
+
+std::unique_ptr<addrmap_mutable>
+section_addrmap ()
+{
+  std::unique_ptr<addrmap_mutable> res (new addrmap_mutable ());
+
+  /* Insert mapped overlay sections first.  */
+  if (overlay_debugging)
+    for (objfile &objfile : current_program_space->objfiles ())
+      for (obj_section &osect : objfile.sections ())
+	if (section_is_mapped (&osect))
+	  res->set_empty (osect.addr (), osect.endaddr () - 1, &osect);
+
+  update_section_map (current_program_space);
+
+  struct objfile_pspace_info *pspace_info
+    = get_objfile_pspace_data (current_program_space);
+
+  for (int i = 0; i < pspace_info->num_sections; ++i)
+    {
+      obj_section *s = pspace_info->sections[i];
+      res->set_empty (s->addr (), s->endaddr () - 1, s);
+    }
+
+  return res;
+}
 
 /* Return non-zero if PC is in a section called NAME.  */
 
diff --git a/gdb/objfiles.h b/gdb/objfiles.h
index fa265f83b79..b193aec3be7 100644
--- a/gdb/objfiles.h
+++ b/gdb/objfiles.h
@@ -38,6 +38,7 @@
 struct htab;
 struct objfile_data;
 struct partial_symbol;
+struct addrmap_mutable;
 
 /* This structure maintains information on a per-objfile basis about the
    "entry point" of the objfile, and the scope within which the entry point
@@ -956,6 +957,11 @@ extern void objfile_purge_solibs (program_space *pspace);
 
 extern struct obj_section *find_pc_section (CORE_ADDR pc);
 
+/* Returns an addrmap mapping addresses to sections, similar to how
+   find_pc_section maps.  */
+
+extern std::unique_ptr<addrmap_mutable> section_addrmap ();
+
 /* Return true if PC is in a section called NAME.  */
 extern bool pc_in_section (CORE_ADDR, const char *);
 
-- 
2.51.0