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)

libsanitizer/

	PR bootstrap/63888
	Reapply:
	2015-02-20  Jakub Jelinek  <jakub@redhat.com>

	* 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: r229114

libsanitizer/ChangeLog

 2015-10-21  Maxim Ostapenko  <m.ostapenko@partner.samsung.com>
 
+	PR bootstrap/63888
+	Reapply:
+	2015-02-20  Jakub Jelinek  <jakub@redhat.com>
+
+	* asan/asan_globals.cc (RegisterGlobal): Disable detect_odr_violation
+	support until it is rewritten upstream.
+
+	* c-c++-common/asan/pr63888.c: New test.
+
+2015-10-21  Maxim Ostapenko  <m.ostapenko@partner.samsung.com>
+
 	PR sanitizer/63958
 	Reapply:
 	2014-10-14  David S. Miller  <davem@davemloft.net>

libsanitizer/asan/asan_globals.cc

@@ -144,7 +144,9 @@ 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)) {