gdb: make so_list::lm_info a unique_ptr

Make it a unique_ptr, so it gets automatically deleted when the so_list
is deleted.

Change-Id: Ib62d60ae2a80656239860b80e4359121c93da13d
Approved-By: Pedro Alves <pedro@palves.net>
Reviewed-By: Reviewed-By: Lancelot Six <lancelot.six@amd.com>

10 files changed, 40 insertions, 31 deletions

diff --git a/gdb/nto-tdep.c b/gdb/nto-tdep.c
index 67e3c70..bcc32fd 100644
--- a/gdb/nto-tdep.c
+++ b/gdb/nto-tdep.c
@@ -247,7 +247,7 @@ nto_parse_redirection (char *pargv[], const char **pin, const char **pout,
 static CORE_ADDR
 lm_addr (const so_list &so)
 {
-  auto *li = gdb::checked_static_cast<const lm_info_svr4 *> (so.lm_info);
+  auto *li = gdb::checked_static_cast<const lm_info_svr4 *> (so.lm_info.get ());
 
   return li->l_addr;
 }
diff --git a/gdb/solib-aix.c b/gdb/solib-aix.c
index 9d232a0..a9931a6 100644
--- a/gdb/solib-aix.c
+++ b/gdb/solib-aix.c
@@ -316,7 +316,7 @@ solib_aix_relocate_section_addresses (so_list &so, target_section *sec)
   struct bfd_section *bfd_sect = sec->the_bfd_section;
   bfd *abfd = bfd_sect->owner;
   const char *section_name = bfd_section_name (bfd_sect);
-  auto *info = gdb::checked_static_cast<lm_info_aix *> (so.lm_info);
+  auto *info = gdb::checked_static_cast<lm_info_aix *> (so.lm_info.get ());
 
   if (strcmp (section_name, ".text") == 0)
     {
@@ -487,7 +487,7 @@ solib_aix_current_sos (void)
       new_solib->so_name[SO_NAME_MAX_PATH_SIZE - 1] = '\0';
       memcpy (new_solib->so_name, new_solib->so_original_name,
 	      SO_NAME_MAX_PATH_SIZE);
-      new_solib->lm_info = new lm_info_aix (info);
+      new_solib->lm_info = gdb::make_unique<lm_info_aix> (info);
 
       /* Add it to the list.  */
       if (!start)
diff --git a/gdb/solib-darwin.c b/gdb/solib-darwin.c
index 78a27ec..31a0b2f 100644
--- a/gdb/solib-darwin.c
+++ b/gdb/solib-darwin.c
@@ -275,14 +275,15 @@ darwin_current_sos (void)
       /* Create and fill the new so_list element.  */
       so_list *newobj = new so_list;
 
-      lm_info_darwin *li = new lm_info_darwin;
-      newobj->lm_info = li;
+      auto li = gdb::make_unique<lm_info_darwin> ();
 
       strncpy (newobj->so_name, file_path.get (), SO_NAME_MAX_PATH_SIZE - 1);
       newobj->so_name[SO_NAME_MAX_PATH_SIZE - 1] = '\0';
       strcpy (newobj->so_original_name, newobj->so_name);
       li->lm_addr = load_addr;
 
+      newobj->lm_info = std::move (li);
+
       if (head == NULL)
 	head = newobj;
       else
@@ -614,7 +615,7 @@ darwin_clear_solib (program_space *pspace)
 static void
 darwin_relocate_section_addresses (so_list &so, target_section *sec)
 {
-  auto *li = gdb::checked_static_cast<lm_info_darwin *> (so.lm_info);
+  auto *li = gdb::checked_static_cast<lm_info_darwin *> (so.lm_info.get ());
 
   sec->addr += li->lm_addr;
   sec->endaddr += li->lm_addr;
diff --git a/gdb/solib-dsbt.c b/gdb/solib-dsbt.c
index 1fa9c74..f765a78 100644
--- a/gdb/solib-dsbt.c
+++ b/gdb/solib-dsbt.c
@@ -595,8 +595,7 @@ dsbt_current_sos (void)
 	    }
 
 	  so_list *sop = new so_list;
-	  lm_info_dsbt *li = new lm_info_dsbt;
-	  sop->lm_info = li;
+	  auto li = gdb::make_unique<lm_info_dsbt> ();
 	  li->map = loadmap;
 	  /* Fetch the name.  */
 	  addr = extract_unsigned_integer (lm_buf.l_name,
@@ -618,6 +617,8 @@ dsbt_current_sos (void)
 	      strcpy (sop->so_original_name, sop->so_name);
 	    }
 
+	  sop->lm_info = std::move (li);
+
 	  *sos_next_ptr = sop;
 	  sos_next_ptr = &sop->next;
 	}
@@ -883,7 +884,7 @@ static void
 dsbt_relocate_section_addresses (so_list &so, target_section *sec)
 {
   int seg;
-  auto *li = gdb::checked_static_cast<lm_info_dsbt *> (so.lm_info);
+  auto *li = gdb::checked_static_cast<lm_info_dsbt *> (so.lm_info.get ());
   int_elf32_dsbt_loadmap *map = li->map;
 
   for (seg = 0; seg < map->nsegs; seg++)
diff --git a/gdb/solib-frv.c b/gdb/solib-frv.c
index 47a81b8..5cbab14 100644
--- a/gdb/solib-frv.c
+++ b/gdb/solib-frv.c
@@ -378,8 +378,7 @@ frv_current_sos (void)
 	    }
 
 	  so_list *sop = new so_list;
-	  lm_info_frv *li = new lm_info_frv;
-	  sop->lm_info = li;
+	  auto li = gdb::make_unique<lm_info_frv> ();
 	  li->map = loadmap;
 	  li->got_value = got_addr;
 	  li->lm_addr = lm_addr;
@@ -402,6 +401,8 @@ frv_current_sos (void)
 	      strcpy (sop->so_original_name, sop->so_name);
 	    }
 
+	  sop->lm_info = std::move (li);
+
 	  *sos_next_ptr = sop;
 	  sos_next_ptr = &sop->next;
 	}
@@ -819,7 +820,7 @@ static void
 frv_relocate_section_addresses (so_list &so, target_section *sec)
 {
   int seg;
-  auto *li = gdb::checked_static_cast<lm_info_frv *> (so.lm_info);
+  auto *li = gdb::checked_static_cast<lm_info_frv *> (so.lm_info.get ());
   int_elf32_fdpic_loadmap *map = li->map;
 
   for (seg = 0; seg < map->nsegs; seg++)
@@ -860,7 +861,7 @@ frv_fdpic_find_global_pointer (CORE_ADDR addr)
   for (struct so_list *so : current_program_space->solibs ())
     {
       int seg;
-      auto *li = gdb::checked_static_cast<lm_info_frv *> (so->lm_info);
+      auto *li = gdb::checked_static_cast<lm_info_frv *> (so->lm_info.get ());
       int_elf32_fdpic_loadmap *map = li->map;
 
       for (seg = 0; seg < map->nsegs; seg++)
@@ -916,7 +917,7 @@ frv_fdpic_find_canonical_descriptor (CORE_ADDR entry_point)
     {
       for (struct so_list *so : current_program_space->solibs ())
 	{
-	  auto *li = gdb::checked_static_cast<lm_info_frv *> (so->lm_info);
+	  auto *li = gdb::checked_static_cast<lm_info_frv *> (so->lm_info.get ());
 
 	  addr = find_canonical_descriptor_in_load_object
 		   (entry_point, got_value, name, so->abfd, li);
@@ -1068,7 +1069,7 @@ frv_fetch_objfile_link_map (struct objfile *objfile)
      of shared libraries.  */
   for (struct so_list *so : current_program_space->solibs ())
     {
-      auto *li = gdb::checked_static_cast<lm_info_frv *> (so->lm_info);
+      auto *li = gdb::checked_static_cast<lm_info_frv *> (so->lm_info.get ());
 
       if (so->objfile == objfile)
 	return li->lm_addr;
diff --git a/gdb/solib-rocm.c b/gdb/solib-rocm.c
index e70b0f8..8162374 100644
--- a/gdb/solib-rocm.c
+++ b/gdb/solib-rocm.c
@@ -181,7 +181,7 @@ rocm_solib_relocate_section_addresses (so_list &so,
       return;
     }
 
-  auto *li = gdb::checked_static_cast<lm_info_svr4 *> (so.lm_info);
+  auto *li = gdb::checked_static_cast<lm_info_svr4 *> (so.lm_info.get ());
   sec->addr = sec->addr + li->l_addr;
   sec->endaddr = sec->endaddr + li->l_addr;
 }
@@ -213,7 +213,7 @@ so_list_from_rocm_sos (const std::vector<rocm_so> &sos)
   for (const rocm_so &so : sos)
     {
       so_list *newobj = new so_list;
-      newobj->lm_info = new lm_info_svr4 (*so.lm_info);
+      newobj->lm_info = gdb::make_unique<lm_info_svr4> (*so.lm_info);
 
       strncpy (newobj->so_name, so.name.c_str (), sizeof (newobj->so_name));
       newobj->so_name[sizeof (newobj->so_name) - 1] = '\0';
diff --git a/gdb/solib-svr4.c b/gdb/solib-svr4.c
index e8113fe..4f9e0b8 100644
--- a/gdb/solib-svr4.c
+++ b/gdb/solib-svr4.c
@@ -188,8 +188,10 @@ svr4_same (const char *gdb_name, const char *inferior_name,
 static int
 svr4_same (const so_list &gdb, const so_list &inferior)
 {
-  auto *lmg = gdb::checked_static_cast<const lm_info_svr4 *> (gdb.lm_info);
-  auto *lmi = gdb::checked_static_cast<const lm_info_svr4 *> (inferior.lm_info);
+  auto *lmg
+    = gdb::checked_static_cast<const lm_info_svr4 *> (gdb.lm_info.get ());
+  auto *lmi
+    = gdb::checked_static_cast<const lm_info_svr4 *> (inferior.lm_info.get ());
 
   return svr4_same (gdb.so_original_name, inferior.so_original_name,
 		    *lmg, *lmi);
@@ -239,7 +241,7 @@ has_lm_dynamic_from_link_map (void)
 static CORE_ADDR
 lm_addr_check (const so_list &so, bfd *abfd)
 {
-  auto *li = gdb::checked_static_cast<lm_info_svr4 *> (so.lm_info);
+  auto *li = gdb::checked_static_cast<lm_info_svr4 *> (so.lm_info.get ());
 
   if (!li->l_addr_p)
     {
@@ -979,7 +981,7 @@ svr4_free_objfile_observer (struct objfile *objfile)
 static void
 svr4_clear_so (const so_list &so)
 {
-  auto *li = gdb::checked_static_cast<lm_info_svr4 *> (so.lm_info);
+  auto *li = gdb::checked_static_cast<lm_info_svr4 *> (so.lm_info.get ());
 
   if (li != NULL)
     li->l_addr_p = 0;
@@ -1001,7 +1003,7 @@ so_list_from_svr4_sos (const std::vector<svr4_so> &sos)
 	       sizeof (newobj->so_name) - 1);
       newobj->so_name[sizeof (newobj->so_name) - 1] = 0;
       strcpy (newobj->so_original_name, newobj->so_name);
-      newobj->lm_info = new lm_info_svr4 (*so.lm_info);
+      newobj->lm_info = gdb::make_unique<lm_info_svr4> (*so.lm_info);
 
       newobj->next = NULL;
       *link = newobj;
@@ -1192,13 +1194,14 @@ svr4_default_sos (svr4_info *info)
     return NULL;
 
   so_list *newobj = new so_list;
-  lm_info_svr4 *li = new lm_info_svr4;
-  newobj->lm_info = li;
+  auto li = gdb::make_unique<lm_info_svr4> ();
 
   /* Nothing will ever check the other fields if we set l_addr_p.  */
   li->l_addr = li->l_addr_inferior = info->debug_loader_offset;
   li->l_addr_p = 1;
 
+  newobj->lm_info = std::move (li);
+
   strncpy (newobj->so_name, info->debug_loader_name, SO_NAME_MAX_PATH_SIZE - 1);
   newobj->so_name[SO_NAME_MAX_PATH_SIZE - 1] = '\0';
   strcpy (newobj->so_original_name, newobj->so_name);
@@ -1495,7 +1498,7 @@ svr4_current_sos (void)
 		[ 9] .dynamic DYNAMIC ffffffffff700580 000580 0000f0
 	  */
 
-	  auto *li = gdb::checked_static_cast<lm_info_svr4 *> (so->lm_info);
+	  auto *li = gdb::checked_static_cast<lm_info_svr4 *> (so->lm_info.get ());
 
 	  if (address_in_mem_range (li->l_ld, &vsyscall_range))
 	    {
@@ -1531,7 +1534,8 @@ svr4_fetch_objfile_link_map (struct objfile *objfile)
   for (struct so_list *so : current_program_space->solibs ())
     if (so->objfile == objfile)
       {
-	auto *li = gdb::checked_static_cast<lm_info_svr4 *> (so->lm_info);
+	auto *li
+	  = gdb::checked_static_cast<lm_info_svr4 *> (so->lm_info.get ());
 
 	return li->lm_addr;
       }
@@ -3292,7 +3296,8 @@ find_debug_base_for_solib (so_list *solib)
   svr4_info *info = get_svr4_info (current_program_space);
   gdb_assert (info != nullptr);
 
-  const lm_info_svr4 *lm_info = (const lm_info_svr4 *) solib->lm_info;
+  auto *lm_info
+    = gdb::checked_static_cast<const lm_info_svr4 *> (solib->lm_info.get ());
 
   for (const auto &tuple : info->solib_lists)
     {
diff --git a/gdb/solib-target.c b/gdb/solib-target.c
index e20a336..3743c77 100644
--- a/gdb/solib-target.c
+++ b/gdb/solib-target.c
@@ -260,7 +260,7 @@ solib_target_current_sos (void)
       /* We no longer need this copy of the name.  */
       info->name.clear ();
 
-      new_solib->lm_info = info.release ();
+      new_solib->lm_info = std::move (info);
 
       /* Add it to the list.  */
       if (!start)
@@ -285,7 +285,7 @@ static void
 solib_target_relocate_section_addresses (so_list &so, target_section *sec)
 {
   CORE_ADDR offset;
-  auto *li = gdb::checked_static_cast<lm_info_target *> (so.lm_info);
+  auto *li = gdb::checked_static_cast<lm_info_target *> (so.lm_info.get ());
 
   /* Build the offset table only once per object file.  We can not do
      it any earlier, since we need to open the file first.  */
diff --git a/gdb/solib.c b/gdb/solib.c
index 4799fab..5ed223b 100644
--- a/gdb/solib.c
+++ b/gdb/solib.c
@@ -675,7 +675,6 @@ void
 free_so (so_list &so)
 {
   clear_so (so);
-  delete so.lm_info;
   delete &so;
 }
 
diff --git a/gdb/solist.h b/gdb/solist.h
index 12ea516..5f9090a 100644
--- a/gdb/solist.h
+++ b/gdb/solist.h
@@ -34,6 +34,8 @@ struct lm_info
   virtual ~lm_info () = 0;
 };
 
+using lm_info_up = std::unique_ptr<lm_info>;
+
 struct so_list
 {
   /* The following fields of the structure come directly from the
@@ -46,7 +48,7 @@ struct so_list
      will be a copy of struct link_map from the user process, but
      it need not be; it can be any collection of data needed to
      traverse the dynamic linker's data structures.  */
-  struct lm_info *lm_info = nullptr;
+  lm_info_up lm_info;
 
   /* Shared object file name, exactly as it appears in the
      inferior's link map.  This may be a relative path, or something