Revert "Revert "Turn off duplicate-classes checking""

This reverts commit 18a1827a159f1b235f3fcc934f428059185f550e.

Bug: 21333911
Change-Id: I8cb96efbf7151b238f3ee137a938b20ddfaf0ebc

1 files changed, 7 insertions, 0 deletions

diff --git a/runtime/class_linker.cc b/runtime/class_linker.cc
index 79c5a0803c..2a0e4e8f68 100644
--- a/runtime/class_linker.cc
+++ b/runtime/class_linker.cc
@@ -85,6 +85,9 @@ namespace art {
 
 static constexpr bool kSanityCheckObjects = kIsDebugBuild;
 
+// For b/21333911.
+static constexpr bool kDuplicateClassesCheck = false;
+
 static void ThrowNoClassDefFoundError(const char* fmt, ...)
     __attribute__((__format__(__printf__, 1, 2)))
     SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
@@ -840,6 +843,10 @@ const OatFile* ClassLinker::GetPrimaryOatFile() {
 // the two elements agree on whether their dex file was from an already-loaded oat-file or the
 // new oat file. Any disagreement indicates a collision.
 bool ClassLinker::HasCollisions(const OatFile* oat_file, std::string* error_msg) {
+  if (!kDuplicateClassesCheck) {
+    return false;
+  }
+
   // Dex files are registered late - once a class is actually being loaded. We have to compare
   // against the open oat files. Take the dex_lock_ that protects oat_files_ accesses.
   ReaderMutexLock mu(Thread::Current(), dex_lock_);