ART: Fix preloaded dex cache expectations

In fallback mode, there may not be dex caches for all boot classpath
dex files - there is no guarantee that a class from every dex file
has been loaded.

Bug: 36033084
Test: m
Test: m test-art-host
Test: manual - fill the /data partition, reboot
Change-Id: I3752b48d9d61947959e8056bd01db0e323724d37

1 files changed, 5 insertions, 1 deletions

diff --git a/runtime/native/dalvik_system_VMRuntime.cc b/runtime/native/dalvik_system_VMRuntime.cc
index 6ca951fd53..11f850524d 100644
--- a/runtime/native/dalvik_system_VMRuntime.cc
+++ b/runtime/native/dalvik_system_VMRuntime.cc
@@ -451,8 +451,12 @@ static void PreloadDexCachesStatsFilled(DexCacheStats* filled)
   Thread* const self = Thread::Current();
   for (const DexFile* dex_file : class_linker->GetBootClassPath()) {
     CHECK(dex_file != nullptr);
+    // In fallback mode, not all boot classpath components might be registered, yet.
+    if (!class_linker->IsDexFileRegistered(self, *dex_file)) {
+      continue;
+    }
     ObjPtr<mirror::DexCache> const dex_cache = class_linker->FindDexCache(self, *dex_file);
-    CHECK(dex_cache != nullptr);  // Boot class path dex caches are never unloaded.
+    DCHECK(dex_cache != nullptr);  // Boot class path dex caches are never unloaded.
     for (size_t j = 0; j < dex_cache->NumStrings(); j++) {
       ObjPtr<mirror::String> string = dex_cache->GetResolvedString(dex::StringIndex(j));
       if (string != nullptr) {