re PR bootstrap/63888 (bootstrap failed when configured with…

re PR bootstrap/63888 (bootstrap failed when configured with -with-build-config=bootstrap-asan --disable-werror)

	PR bootstrap/63888
	* asan/asan_globals.cc (RegisterGlobal): Disable detect_odr_violation
	support until it is rewritten upstream.

	* c-c++-common/asan/pr63888.c: New test.

From-SVN: r220919

gcc/testsuite/ChangeLog

+2015-02-20  Jakub Jelinek  <jakub@redhat.com>
+
+	PR bootstrap/63888
+	* c-c++-common/asan/pr63888.c: New test.
+
 2015-02-23  Oleg Endo  <olegendo@gcc.gnu.org>
 
 	PR target/65163

gcc/testsuite/c-c++-common/asan/pr63888.c

+/* PR bootstrap/63888 */
+/* { dg-do run } */
+
+__attribute__((noinline, noclone)) int
+foo (int x)
+{
+  int v = 0;
+  switch (x)
+    {
+    case 11: v = 67; break;
+    case 12: v = 68; break;
+    case 13: v = 69; break;
+    }
+  return v;
+}
+
+__attribute__((noinline, noclone)) int
+bar (int x)
+{
+  int v = 0;
+  switch (x)
+    {
+    case 18: v = 67; break;
+    case 19: v = 68; break;
+    case 20: v = 69; break;
+    }
+  return v;
+}
+
+int
+main ()
+{
+  return foo (11) - 67 + bar (19) - 68;
+}

libsanitizer/ChangeLog

+2015-02-20  Jakub Jelinek  <jakub@redhat.com>
+
+	PR bootstrap/63888
+	* asan/asan_globals.cc (RegisterGlobal): Disable detect_odr_violation
+	support until it is rewritten upstream.
+
 2015-01-26  Matthias Klose  <doko@ubuntu.com>
 
 	* configure.ac: Move AM_ENABLE_MULTILIB before AC_PROG_CC.

libsanitizer/asan/asan_globals.cc

@@ -148,7 +148,9 @@ static void RegisterGlobal(const Global *g) {
   CHECK(AddrIsInMem(g->beg));
   CHECK(AddrIsAlignedByGranularity(g->beg));
   CHECK(AddrIsAlignedByGranularity(g->size_with_redzone));
-  if (flags()->detect_odr_violation) {
+  // This "ODR violation" detection is fundamentally incompatible with
+  // how GCC registers globals.  Disable as useless until rewritten upstream.
+  if (0 && flags()->detect_odr_violation) {
     // Try detecting ODR (One Definition Rule) violation, i.e. the situation
     // where two globals with the same name are defined in different modules.
     if (__asan_region_is_poisoned(g->beg, g->size_with_redzone)) {