From: Tom Tromey <tom@tromey.com>
Date: Sat, 2 Mar 2019 20:19:44 +0000 (-0700)
Subject: Defer minimal symbol name-setting
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=bb749d8ae30108c85d3ae5011a4261d01574b342;p=thirdparty%2Fbinutils-gdb.git

Defer minimal symbol name-setting

Currently the demangled name of a minimal symbol is set when creating
the symbol.  However, there is no intrinsic need to do this.  This
patch instead arranges for the demangling to be done just before the
minsym hash tables are filled.  This will be useful in a later patch.

gdb/ChangeLog
2019-10-19  Tom Tromey  <tom@tromey.com>

	* symtab.h (struct minimal_symbol) <name_set>: New member.
	* minsyms.c (minimal_symbol_reader::record_full): Copy name.
	Don't call symbol_set_names.
	(minimal_symbol_reader::install): Call symbol_set_names.

Change-Id: I4fe3993b99fb3a43968067806e294d48e377fd76
---

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 6f377f33473..b9b90d43d19 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,10 @@
+2019-10-19  Tom Tromey  <tom@tromey.com>
+
+	* symtab.h (struct minimal_symbol) <name_set>: New member.
+	* minsyms.c (minimal_symbol_reader::record_full): Copy name.
+	Don't call symbol_set_names.
+	(minimal_symbol_reader::install): Call symbol_set_names.
+
 2019-11-10  Tom Tromey  <tom@tromey.com>
 
 	* tui/tui-wingeneral.c (tui_unhighlight_win): Use can_box.
diff --git a/gdb/minsyms.c b/gdb/minsyms.c
index 78cb15b5677..3af6e2e941a 100644
--- a/gdb/minsyms.c
+++ b/gdb/minsyms.c
@@ -1127,7 +1127,12 @@ minimal_symbol_reader::record_full (gdb::string_view name,
   msymbol = &m_msym_bunch->contents[m_msym_bunch_index];
   symbol_set_language (msymbol, language_auto,
 		       &m_objfile->per_bfd->storage_obstack);
-  symbol_set_names (msymbol, name, copy_name, m_objfile->per_bfd);
+
+  if (copy_name)
+    msymbol->name = obstack_strndup (&m_objfile->per_bfd->storage_obstack,
+				     name.data (), name.size ());
+  else
+    msymbol->name = name.data ();
 
   SET_MSYMBOL_VALUE_ADDRESS (msymbol, address);
   MSYMBOL_SECTION (msymbol) = section;
@@ -1354,6 +1359,17 @@ minimal_symbol_reader::install ()
       m_objfile->per_bfd->minimal_symbol_count = mcount;
       m_objfile->per_bfd->msymbols = std::move (msym_holder);
 
+      msymbols = m_objfile->per_bfd->msymbols.get ();
+      for (int i = 0; i < mcount; ++i)
+	{
+	  if (!msymbols[i].name_set)
+	    {
+	      symbol_set_names (&msymbols[i], msymbols[i].name,
+				false, m_objfile->per_bfd);
+	      msymbols[i].name_set = 1;
+	    }
+	}
+
       build_minimal_symbol_hash_tables (m_objfile);
     }
 }
diff --git a/gdb/symtab.h b/gdb/symtab.h
index 111a0f924d8..3c05b23dc66 100644
--- a/gdb/symtab.h
+++ b/gdb/symtab.h
@@ -698,6 +698,10 @@ struct minimal_symbol : public general_symbol_info
 
   unsigned maybe_copied : 1;
 
+  /* Non-zero if this symbol ever had its demangled name set (even if
+     it was set to NULL).  */
+  unsigned int name_set : 1;
+
   /* Minimal symbols with the same hash key are kept on a linked
      list.  This is the link.  */