Revert "Revert "Store resolved Strings for AOT code in .bss.""

Fixed oat_test to keep dex files alive. Fixed mips build.
Rewritten the .bss GC root visiting and added write barrier
to the artResolveStringFromCode().

Test: build aosp_mips-eng
Test: m ART_DEFAULT_GC_TYPE=SS test-art-target-host-gtest-oat_test
Test: Run ART test suite on host and Nexus 9.
Bug: 20323084
Bug: 30627598

This reverts commit 5f926055cb88089d8ca27243f35a9dfd89d981f0.

Change-Id: I07fa2278d82b8eb64964c9a4b66cb93726ccda6b

1 files changed, 11 insertions, 0 deletions

diff --git a/runtime/class_table.cc b/runtime/class_table.cc
index 0600876122..2ae7e8cc30 100644
--- a/runtime/class_table.cc
+++ b/runtime/class_table.cc
@@ -165,6 +165,16 @@ bool ClassTable::InsertStrongRoot(mirror::Object* obj) {
     }
   }
   strong_roots_.push_back(GcRoot<mirror::Object>(obj));
+  // If `obj` is a dex cache associated with a new oat file with GC roots, add it to oat_files_.
+  if (obj->IsDexCache()) {
+    const DexFile* dex_file = down_cast<mirror::DexCache*>(obj)->GetDexFile();
+    if (dex_file != nullptr && dex_file->GetOatDexFile() != nullptr) {
+      const OatFile* oat_file = dex_file->GetOatDexFile()->GetOatFile();
+      if (!oat_file->GetBssGcRoots().empty() && !ContainsElement(oat_files_, oat_file)) {
+        oat_files_.push_back(oat_file);
+      }
+    }
+  }
   return true;
 }
 
@@ -201,6 +211,7 @@ void ClassTable::AddClassSet(ClassSet&& set) {
 
 void ClassTable::ClearStrongRoots() {
   WriterMutexLock mu(Thread::Current(), lock_);
+  oat_files_.clear();
   strong_roots_.clear();
 }
 }  // namespace art