Class-ify lm_info_svr4

This patch makes lm_info_svr4 a "real" class.  It initializes fields,
uses bool and replaces XCNEW/xfree with new/delete.

The memcpy in svr4_copy_library_list is replaced by a usage of the
default copy constructor.

gdb/ChangeLog:

	* solib-svr4.h (struct lm_info_svr4): Initialize fields.
	<l_addr_p>: Change type to bool.
	* solib-svr4.c (lm_info_read): Allocate lm_info_svr4 with new.
	(svr4_free_so): Free lm_info_svr4 with delete.
	(svr4_copy_library_list): Replace memcpy with call to copy
	constructor.
	(library_list_start_library, svr4_default_sos): Allocate
	lm_info_svr4 with new.

3 files changed, 23 insertions, 10 deletions

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 7ec97d0fc7..eb0571b8dd 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,5 +1,16 @@
 2017-04-28  Simon Marchi  <simon.marchi@ericsson.com>
 
+	* solib-svr4.h (struct lm_info_svr4): Initialize fields.
+	<l_addr_p>: Change type to bool.
+	* solib-svr4.c (lm_info_read): Allocate lm_info_svr4 with new.
+	(svr4_free_so): Free lm_info_svr4 with delete.
+	(svr4_copy_library_list): Replace memcpy with call to copy
+	constructor.
+	(library_list_start_library, svr4_default_sos): Allocate
+	lm_info_svr4 with new.
+
+2017-04-28  Simon Marchi  <simon.marchi@ericsson.com>
+
 	* solib-target.c (struct lm_info_target): Add destructor,
 	initialize fields.
 	<name>: Change type to std::string.
diff --git a/gdb/solib-svr4.c b/gdb/solib-svr4.c
index 6098d505da..080fd795ed 100644
--- a/gdb/solib-svr4.c
+++ b/gdb/solib-svr4.c
@@ -189,7 +189,7 @@ lm_info_read (CORE_ADDR lm_addr)
     {
       struct type *ptr_type = builtin_type (target_gdbarch ())->builtin_data_ptr;
 
-      lm_info = XCNEW (lm_info_svr4);
+      lm_info = new lm_info_svr4;
       lm_info->lm_addr = lm_addr;
 
       lm_info->l_addr_inferior = extract_typed_address (&lm[lmo->l_addr_offset],
@@ -1080,7 +1080,9 @@ struct svr4_library_list
 static void
 svr4_free_so (struct so_list *so)
 {
-  xfree (so->lm_info);
+  lm_info_svr4 *li = (lm_info_svr4 *) so->lm_info;
+
+  delete li;
 }
 
 /* Implement target_so_ops.clear_so.  */
@@ -1125,8 +1127,8 @@ svr4_copy_library_list (struct so_list *src)
       newobj = XNEW (struct so_list);
       memcpy (newobj, src, sizeof (struct so_list));
 
-      newobj->lm_info = XNEW (lm_info_svr4);
-      memcpy (newobj->lm_info, src->lm_info, sizeof (lm_info_svr4));
+      lm_info_svr4 *src_li = (lm_info_svr4 *) src->lm_info;
+      newobj->lm_info = new lm_info_svr4 (*src_li);
 
       newobj->next = NULL;
       *link = newobj;
@@ -1162,7 +1164,7 @@ library_list_start_library (struct gdb_xml_parser *parser,
   struct so_list *new_elem;
 
   new_elem = XCNEW (struct so_list);
-  lm_info_svr4 *li = XCNEW (lm_info_svr4);
+  lm_info_svr4 *li = new lm_info_svr4;
   new_elem->lm_info = li;
   li->lm_addr = *lmp;
   li->l_addr_inferior = *l_addrp;
@@ -1317,7 +1319,7 @@ svr4_default_sos (void)
     return NULL;
 
   newobj = XCNEW (struct so_list);
-  lm_info_svr4 *li = XCNEW (lm_info_svr4);
+  lm_info_svr4 *li = new lm_info_svr4;
   newobj->lm_info = li;
 
   /* Nothing will ever check the other fields if we set l_addr_p.  */
diff --git a/gdb/solib-svr4.h b/gdb/solib-svr4.h
index a9b09aa56c..705c587d0a 100644
--- a/gdb/solib-svr4.h
+++ b/gdb/solib-svr4.h
@@ -38,14 +38,14 @@ struct lm_info_svr4 : public lm_info_base
      It is commonly the same value.  It is cached as we want to warn about
      the difference and compute it only once.  L_ADDR is valid
      iff L_ADDR_P.  */
-  CORE_ADDR l_addr, l_addr_inferior;
-  unsigned int l_addr_p : 1;
+  CORE_ADDR l_addr = 0, l_addr_inferior = 0;
+  bool l_addr_p = false;
 
   /* The target location of lm.  */
-  CORE_ADDR lm_addr;
+  CORE_ADDR lm_addr = 0;
 
   /* Values read in from inferior's fields of the same name.  */
-  CORE_ADDR l_ld, l_next, l_prev, l_name;
+  CORE_ADDR l_ld = 0, l_next = 0, l_prev = 0, l_name = 0;
 };
 
 /* Critical offsets and sizes which describe struct r_debug and