From 8d8a3bda40b0fa5aeb801287f0e2e79affe26c54 Mon Sep 17 00:00:00 2001
From: Dodji Seketeli <dodji@redhat.com>
Date: Tue, 31 May 2011 12:17:21 +0000
Subject: [PATCH] re PR debug/49047 (DW_AT_linkage_name missing for
 constructors and destructors)

Fix PR debug/49047

gcc/

	* dwarf2out.c (gen_subprogram_die): Emit linkage name attribute
	for concrete functions containing the code of cloned functions.

gcc/testsuite/

	* g++.dg/debug/dwarf2/cdtor-1.C: New test.

From-SVN: r174474
---
 gcc/ChangeLog                               |  6 ++++++
 gcc/dwarf2out.c                             |  6 ++++++
 gcc/testsuite/ChangeLog                     |  5 +++++
 gcc/testsuite/g++.dg/debug/dwarf2/cdtor-1.C | 17 +++++++++++++++++
 4 files changed, 34 insertions(+)
 create mode 100644 gcc/testsuite/g++.dg/debug/dwarf2/cdtor-1.C

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 192845576e8..e29a763cb0d 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2011-05-31  Dodji Seketeli  <dodji@redhat.com>
+
+	PR debug/49047
+	* dwarf2out.c (gen_subprogram_die): Emit linkage name attribute
+    	for concrete functions containing the code of cloned functions.
+
 2011-05-31  Richard Guenther  <rguenther@suse.de>
 
 	* tree-ssa-forwprop.c (forward_propagate_into_comparison): Rename
diff --git a/gcc/dwarf2out.c b/gcc/dwarf2out.c
index 7ec1e931eed..9a415e9a171 100644
--- a/gcc/dwarf2out.c
+++ b/gcc/dwarf2out.c
@@ -19636,6 +19636,12 @@ gen_subprogram_die (tree decl, dw_die_ref context_die)
 
       subr_die = new_die (DW_TAG_subprogram, context_die, decl);
       add_abstract_origin_attribute (subr_die, origin);
+      /*  This is where the actual code for a cloned function is.
+	  Let's emit linkage name attribute for it.  This helps
+	  debuggers to e.g, set breakpoints into
+	  constructors/destructors when the user asks "break
+	  K::K".  */
+      add_linkage_name (subr_die, decl);
     }
   else if (old_die)
     {
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 3f7b52abf18..dfa323b06ab 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2011-05-31  Dodji Seketeli  <dodji@redhat.com>
+
+	PR debug/49047
+	* g++.dg/debug/dwarf2/cdtor-1.C: New test.
+
 2011-05-31  Ira Rosen  <ira.rosen@linaro.org>
 
 	PR testsuite/49239
diff --git a/gcc/testsuite/g++.dg/debug/dwarf2/cdtor-1.C b/gcc/testsuite/g++.dg/debug/dwarf2/cdtor-1.C
new file mode 100644
index 00000000000..6d39e54ae08
--- /dev/null
+++ b/gcc/testsuite/g++.dg/debug/dwarf2/cdtor-1.C
@@ -0,0 +1,17 @@
+// origin PR debug/49047
+// { dg-options "-g -dA" }
+// { dg-do compile }
+
+struct K
+{
+  K () { }
+  ~K () { }
+};
+
+int
+main()
+{
+    K k;
+}
+
+// { dg-final {scan-assembler-times "\[^\n\r\]*DW_AT_MIPS_linkage_name:" 2 } }