Object model changes to support 64bit.

Modify mirror objects so that references between them use an ObjectReference
value type rather than an Object* so that functionality to compress larger
references can be captured in the ObjectRefererence implementation.
ObjectReferences are 32bit and all other aspects of object layout remain as
they are currently.

Expand fields in objects holding pointers so they can hold 64bit pointers. Its
expected the size of these will come down by improving where we hold compiler
meta-data.
Stub out x86_64 architecture specific runtime implementation.
Modify OutputStream so that reads and writes are of unsigned quantities.
Make the use of portable or quick code more explicit.
Templatize AtomicInteger to support more than just int32_t as a type.
Add missing, and fix issues relating to, missing annotalysis information on the
mutator lock.
Refactor and share implementations for array copy between System and uses
elsewhere in the runtime.
Fix numerous 64bit build issues.

Change-Id: I1a5694c251a42c9eff71084dfdd4b51fff716822

1 files changed, 21 insertions, 19 deletions

diff --git a/runtime/thread.cc b/runtime/thread.cc
index c3ef228487..c649765e55 100644
--- a/runtime/thread.cc
+++ b/runtime/thread.cc
@@ -178,7 +178,7 @@ void* Thread::CreateCallback(void* arg) {
         receiver->GetClass()->FindVirtualMethodForVirtualOrInterface(soa.DecodeMethod(mid));
     JValue result;
     ArgArray arg_array(nullptr, 0);
-    arg_array.Append(reinterpret_cast<uint32_t>(receiver));
+    arg_array.Append(receiver);
     m->Invoke(self, arg_array.GetArray(), arg_array.GetNumBytes(), &result, 'V');
   }
   // Detach and delete self.
@@ -190,7 +190,7 @@ void* Thread::CreateCallback(void* arg) {
 Thread* Thread::FromManagedThread(const ScopedObjectAccessUnchecked& soa,
                                   mirror::Object* thread_peer) {
   mirror::ArtField* f = soa.DecodeField(WellKnownClasses::java_lang_Thread_nativePeer);
-  Thread* result = reinterpret_cast<Thread*>(static_cast<uintptr_t>(f->GetInt(thread_peer)));
+  Thread* result = reinterpret_cast<Thread*>(static_cast<uintptr_t>(f->GetLong(thread_peer)));
   // Sanity check that if we have a result it is either suspended or we hold the thread_list_lock_
   // to stop it from going away.
   if (kIsDebugBuild) {
@@ -260,8 +260,8 @@ void Thread::CreateNativeThread(JNIEnv* env, jobject java_peer, size_t stack_siz
 
   // Thread.start is synchronized, so we know that nativePeer is 0, and know that we're not racing to
   // assign it.
-  env->SetIntField(java_peer, WellKnownClasses::java_lang_Thread_nativePeer,
-                   reinterpret_cast<jint>(child_thread));
+  env->SetLongField(java_peer, WellKnownClasses::java_lang_Thread_nativePeer,
+                    reinterpret_cast<jlong>(child_thread));
 
   pthread_t new_pthread;
   pthread_attr_t attr;
@@ -283,7 +283,7 @@ void Thread::CreateNativeThread(JNIEnv* env, jobject java_peer, size_t stack_siz
     delete child_thread;
     child_thread = nullptr;
     // TODO: remove from thread group?
-    env->SetIntField(java_peer, WellKnownClasses::java_lang_Thread_nativePeer, 0);
+    env->SetLongField(java_peer, WellKnownClasses::java_lang_Thread_nativePeer, 0);
     {
       std::string msg(StringPrintf("pthread_create (%s stack) failed: %s",
                                    PrettySize(stack_size).c_str(), strerror(pthread_create_result)));
@@ -388,8 +388,8 @@ void Thread::CreatePeer(const char* name, bool as_daemon, jobject thread_group)
 
   Thread* self = this;
   DCHECK_EQ(self, Thread::Current());
-  jni_env_->SetIntField(peer.get(), WellKnownClasses::java_lang_Thread_nativePeer,
-                        reinterpret_cast<jint>(self));
+  jni_env_->SetLongField(peer.get(), WellKnownClasses::java_lang_Thread_nativePeer,
+                         reinterpret_cast<jlong>(self));
 
   ScopedObjectAccess soa(self);
   SirtRef<mirror::String> peer_thread_name(soa.Self(), GetThreadName(soa));
@@ -767,7 +767,7 @@ struct StackDumpVisitor : public StackVisitor {
     }
     const int kMaxRepetition = 3;
     mirror::Class* c = m->GetDeclaringClass();
-    const mirror::DexCache* dex_cache = c->GetDexCache();
+    mirror::DexCache* dex_cache = c->GetDexCache();
     int line_number = -1;
     if (dex_cache != nullptr) {  // be tolerant of bad input
       const DexFile& dex_file = *dex_cache->GetDexFile();
@@ -1017,7 +1017,7 @@ void Thread::Destroy() {
     RemoveFromThreadGroup(soa);
 
     // this.nativePeer = 0;
-    soa.DecodeField(WellKnownClasses::java_lang_Thread_nativePeer)->SetInt(opeer_, 0);
+    soa.DecodeField(WellKnownClasses::java_lang_Thread_nativePeer)->SetLong(opeer_, 0);
     Dbg::PostThreadDeath(self);
 
     // Thread.join() is implemented as an Object.wait() on the Thread.lock object. Signal anyone
@@ -1133,7 +1133,8 @@ size_t Thread::NumSirtReferences() {
 }
 
 bool Thread::SirtContains(jobject obj) const {
-  mirror::Object** sirt_entry = reinterpret_cast<mirror::Object**>(obj);
+  StackReference<mirror::Object>* sirt_entry =
+      reinterpret_cast<StackReference<mirror::Object>*>(obj);
   for (StackIndirectReferenceTable* cur = top_sirt_; cur; cur = cur->GetLink()) {
     if (cur->Contains(sirt_entry)) {
       return true;
@@ -1172,10 +1173,11 @@ mirror::Object* Thread::DecodeJObject(jobject obj) const {
     IndirectReferenceTable& locals = jni_env_->locals;
     result = const_cast<mirror::Object*>(locals.Get(ref));
   } else if (kind == kSirtOrInvalid) {
-    // TODO: make stack indirect reference table lookup more efficient
-    // Check if this is a local reference in the SIRT
+    // TODO: make stack indirect reference table lookup more efficient.
+    // Check if this is a local reference in the SIRT.
     if (LIKELY(SirtContains(obj))) {
-      result = *reinterpret_cast<mirror::Object**>(obj);  // Read from SIRT
+      // Read from SIRT.
+      result = reinterpret_cast<StackReference<mirror::Object>*>(obj)->AsMirrorPtr();
     } else if (Runtime::Current()->GetJavaVM()->work_around_app_jni_bugs) {
       // Assume an invalid local reference is actually a direct pointer.
       result = reinterpret_cast<mirror::Object*>(obj);
@@ -1569,12 +1571,12 @@ void Thread::ThrowNewWrappedException(const ThrowLocation& throw_location,
     SetException(gc_safe_throw_location, exception.get());
   } else {
     ArgArray args("VLL", 3);
-    args.Append(reinterpret_cast<uint32_t>(exception.get()));
+    args.Append(exception.get());
     if (msg != nullptr) {
-      args.Append(reinterpret_cast<uint32_t>(msg_string.get()));
+      args.Append(msg_string.get());
     }
     if (cause.get() != nullptr) {
-      args.Append(reinterpret_cast<uint32_t>(cause.get()));
+      args.Append(cause.get());
     }
     JValue result;
     exception_init_method->Invoke(this, args.GetArray(), args.GetNumBytes(), &result, 'V');
@@ -1920,13 +1922,13 @@ class ReferenceMapVisitor : public StackVisitor {
                   }
                 }
               } else {
-                uint32_t* reg_addr =
-                    GetVRegAddr(cur_quick_frame, code_item, core_spills, fp_spills, frame_size, reg);
+                uintptr_t* reg_addr = reinterpret_cast<uintptr_t*>(
+                    GetVRegAddr(cur_quick_frame, code_item, core_spills, fp_spills, frame_size, reg));
                 mirror::Object* ref = reinterpret_cast<mirror::Object*>(*reg_addr);
                 if (ref != nullptr) {
                   mirror::Object* new_ref = visitor_(ref, reg, this);
                   if (ref != new_ref) {
-                    *reg_addr = reinterpret_cast<uint32_t>(new_ref);
+                    *reg_addr = reinterpret_cast<uintptr_t>(new_ref);
                   }
                 }
               }