From: Markus Trippelsdorf <markus@trippelsdorf.de>
Date: Wed, 29 Jan 2014 18:36:42 +0000 (+0000)
Subject: backport: re PR gcov-profile/55650 (Firefox profiledbuild:  libxul.so: cannot map... 
X-Git-Tag: releases/gcc-4.7.4~279
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=64a7e4703b7ac2836d476b32b524049b69996220;p=thirdparty%2Fgcc.git

backport: re PR gcov-profile/55650 (Firefox profiledbuild:  libxul.so: cannot map zero-fill pages: Cannot allocate memory)

2014-01-29  Markus Trippelsdorf  <markus@trippelsdorf.de>

        Backport from mainline
        2012-12-13  Jakub Jelinek  <jakub@redhat.com>

        PR gcov-profile/55650
        * coverage.c (coverage_obj_init): Return false if no functions
        are being emitted.

        * g++.dg/other/pr55650.C: New test.
        * g++.dg/other/pr55650.cc: New file

From-SVN: r207277
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index c8e08cf9a40b..4cfc1b1d0c80 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,12 @@
+2014-01-29  Markus Trippelsdorf  <markus@trippelsdorf.de>
+
+	Backport from mainline
+	2012-12-13  Jakub Jelinek  <jakub@redhat.com>
+
+	PR gcov-profile/55650
+	* coverage.c (coverage_obj_init): Return false if no functions
+	are being emitted.
+
 2014-01-25  Walter Lee  <walt@tilera.com>
 
 	Backport from mainline
diff --git a/gcc/coverage.c b/gcc/coverage.c
index c64125ad58b0..8a113a50c2e2 100644
--- a/gcc/coverage.c
+++ b/gcc/coverage.c
@@ -988,6 +988,9 @@ coverage_obj_init (void)
       /* The function is not being emitted, remove from list.  */
       *fn_prev = fn->next;
 
+  if (functions_head == NULL)
+    return false;
+
   for (ix = 0; ix != GCOV_COUNTERS; ix++)
     if ((1u << ix) & prg_ctr_mask)
       n_counters++;
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index a0320c6401b8..152554dcfcda 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,12 @@
+2014-01-29  Markus Trippelsdorf  <markus@trippelsdorf.de>
+
+	Backport from mainline
+	2012-12-13  Jakub Jelinek  <jakub@redhat.com>
+
+	PR gcov-profile/55650
+	* g++.dg/other/pr55650.C: New test.
+	* g++.dg/other/pr55650.cc: New file.
+
 2014-01-26  Mikael Morin  <mikael@gcc.gnu.org>
 
 	PR fortran/58007
diff --git a/gcc/testsuite/g++.dg/other/pr55650.C b/gcc/testsuite/g++.dg/other/pr55650.C
new file mode 100644
index 000000000000..fc52b19f5d30
--- /dev/null
+++ b/gcc/testsuite/g++.dg/other/pr55650.C
@@ -0,0 +1,21 @@
+// PR gcov-profile/55650
+// { dg-do link }
+// { dg-options "-O2 -fprofile-generate" }
+// { dg-additional-sources "pr55650.cc" }
+
+struct A
+{
+  virtual void foo ();
+};
+
+struct B : public A
+{
+  B ();
+  void foo () {}
+};
+
+inline A *
+bar ()
+{
+  return new B;
+}
diff --git a/gcc/testsuite/g++.dg/other/pr55650.cc b/gcc/testsuite/g++.dg/other/pr55650.cc
new file mode 100644
index 000000000000..70b41462b57e
--- /dev/null
+++ b/gcc/testsuite/g++.dg/other/pr55650.cc
@@ -0,0 +1,4 @@
+int
+main ()
+{
+}