Merge "Remove interpreter entrypoint in ArtMethod."
diff --git a/compiler/image_writer.cc b/compiler/image_writer.cc
index 73e121f..93dd29d 100644
--- a/compiler/image_writer.cc
+++ b/compiler/image_writer.cc
@@ -1417,9 +1417,6 @@
     if (UNLIKELY(orig->IsAbstract())) {
       copy->SetEntryPointFromQuickCompiledCodePtrSize(
           GetOatAddress(quick_to_interpreter_bridge_offset_), target_ptr_size_);
-      copy->SetEntryPointFromInterpreterPtrSize(
-          reinterpret_cast<EntryPointFromInterpreter*>(const_cast<uint8_t*>(
-                  GetOatAddress(interpreter_to_interpreter_bridge_offset_))), target_ptr_size_);
     } else {
       bool quick_is_interpreted;
       const uint8_t* quick_code = GetQuickCode(orig, &quick_is_interpreted);
@@ -1432,16 +1429,6 @@
         copy->SetEntryPointFromJniPtrSize(
             GetOatAddress(jni_dlsym_lookup_offset_), target_ptr_size_);
       }
-
-      // Interpreter entrypoint:
-      // Set the interpreter entrypoint depending on whether there is compiled code or not.
-      uint32_t interpreter_code = (quick_is_interpreted)
-          ? interpreter_to_interpreter_bridge_offset_
-          : interpreter_to_compiled_code_bridge_offset_;
-      EntryPointFromInterpreter* interpreter_entrypoint =
-          reinterpret_cast<EntryPointFromInterpreter*>(
-              const_cast<uint8_t*>(GetOatAddress(interpreter_code)));
-      copy->SetEntryPointFromInterpreterPtrSize(interpreter_entrypoint, target_ptr_size_);
     }
   }
 }
diff --git a/imgdiag/imgdiag.cc b/imgdiag/imgdiag.cc
index f324881..dce5206 100644
--- a/imgdiag/imgdiag.cc
+++ b/imgdiag/imgdiag.cc
@@ -548,10 +548,6 @@
           os << "  entryPointFromJni: "
              << reinterpret_cast<const void*>(
                     art_method->GetEntryPointFromJniPtrSize(pointer_size)) << ", ";
-          os << "  entryPointFromInterpreter: "
-             << reinterpret_cast<const void*>(
-                    art_method->GetEntryPointFromInterpreterPtrSize(pointer_size))
-             << ", ";
           os << "  entryPointFromQuickCompiledCode: "
              << reinterpret_cast<const void*>(
                     art_method->GetEntryPointFromQuickCompiledCodePtrSize(pointer_size))
@@ -631,10 +627,6 @@
           os << "  entryPointFromJni: "
              << reinterpret_cast<const void*>(
                     art_method->GetEntryPointFromJniPtrSize(pointer_size)) << ", ";
-          os << "  entryPointFromInterpreter: "
-             << reinterpret_cast<const void*>(
-                    art_method->GetEntryPointFromInterpreterPtrSize(pointer_size))
-             << ", ";
           os << "  entryPointFromQuickCompiledCode: "
              << reinterpret_cast<const void*>(
                     art_method->GetEntryPointFromQuickCompiledCodePtrSize(pointer_size))
diff --git a/patchoat/patchoat.cc b/patchoat/patchoat.cc
index 3a155be..dbd1d23 100644
--- a/patchoat/patchoat.cc
+++ b/patchoat/patchoat.cc
@@ -651,8 +651,6 @@
   copy->SetDexCacheResolvedTypes(RelocatedAddressOfPointer(object->GetDexCacheResolvedTypes()));
   copy->SetEntryPointFromQuickCompiledCodePtrSize(RelocatedAddressOfPointer(
       object->GetEntryPointFromQuickCompiledCodePtrSize(pointer_size)), pointer_size);
-  copy->SetEntryPointFromInterpreterPtrSize(RelocatedAddressOfPointer(
-      object->GetEntryPointFromInterpreterPtrSize(pointer_size)), pointer_size);
   copy->SetEntryPointFromJniPtrSize(RelocatedAddressOfPointer(
       object->GetEntryPointFromJniPtrSize(pointer_size)), pointer_size);
 }
diff --git a/runtime/art_method.h b/runtime/art_method.h
index 4a1e2c4..e8c47d9 100644
--- a/runtime/art_method.h
+++ b/runtime/art_method.h
@@ -43,9 +43,6 @@
 class PointerArray;
 }  // namespace mirror
 
-typedef void (EntryPointFromInterpreter)(Thread* self, const DexFile::CodeItem* code_item,
-                                         ShadowFrame* shadow_frame, JValue* result);
-
 class ArtMethod FINAL {
  public:
   ArtMethod() : access_flags_(0), dex_code_item_offset_(0), dex_method_index_(0),
@@ -272,23 +269,6 @@
   void Invoke(Thread* self, uint32_t* args, uint32_t args_size, JValue* result, const char* shorty)
       SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
 
-  EntryPointFromInterpreter* GetEntryPointFromInterpreter() {
-    return GetEntryPointFromInterpreterPtrSize(sizeof(void*));
-  }
-  EntryPointFromInterpreter* GetEntryPointFromInterpreterPtrSize(size_t pointer_size) {
-    return GetEntryPoint<EntryPointFromInterpreter*>(
-        EntryPointFromInterpreterOffset(pointer_size), pointer_size);
-  }
-
-  void SetEntryPointFromInterpreter(EntryPointFromInterpreter* entry_point_from_interpreter) {
-    SetEntryPointFromInterpreterPtrSize(entry_point_from_interpreter, sizeof(void*));
-  }
-  void SetEntryPointFromInterpreterPtrSize(EntryPointFromInterpreter* entry_point_from_interpreter,
-                                           size_t pointer_size) {
-    SetEntryPoint(EntryPointFromInterpreterOffset(pointer_size), entry_point_from_interpreter,
-                  pointer_size);
-  }
-
   const void* GetEntryPointFromQuickCompiledCode() {
     return GetEntryPointFromQuickCompiledCodePtrSize(sizeof(void*));
   }
@@ -398,11 +378,6 @@
 
   void UnregisterNative() SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
 
-  static MemberOffset EntryPointFromInterpreterOffset(size_t pointer_size) {
-    return MemberOffset(PtrSizedFieldsOffset(pointer_size) + OFFSETOF_MEMBER(
-        PtrSizedFields, entry_point_from_interpreter_) / sizeof(void*) * pointer_size);
-  }
-
   static MemberOffset EntryPointFromJniOffset(size_t pointer_size) {
     return MemberOffset(PtrSizedFieldsOffset(pointer_size) + OFFSETOF_MEMBER(
         PtrSizedFields, entry_point_from_jni_) / sizeof(void*) * pointer_size);
@@ -573,10 +548,6 @@
   // PACKED(4) is necessary for the correctness of
   // RoundUp(OFFSETOF_MEMBER(ArtMethod, ptr_sized_fields_), pointer_size).
   struct PACKED(4) PtrSizedFields {
-    // Method dispatch from the interpreter invokes this pointer which may cause a bridge into
-    // compiled code.
-    void* entry_point_from_interpreter_;
-
     // Pointer to JNI function registered to this method, or a function to resolve the JNI function.
     void* entry_point_from_jni_;
 
diff --git a/runtime/asm_support.h b/runtime/asm_support.h
index 10ed0f4..20d75f3 100644
--- a/runtime/asm_support.h
+++ b/runtime/asm_support.h
@@ -189,11 +189,11 @@
 ADD_TEST_EQ(ART_METHOD_DEX_CACHE_TYPES_OFFSET,
             art::ArtMethod::DexCacheResolvedTypesOffset().Int32Value())
 
-#define ART_METHOD_QUICK_CODE_OFFSET_32 36
+#define ART_METHOD_QUICK_CODE_OFFSET_32 32
 ADD_TEST_EQ(ART_METHOD_QUICK_CODE_OFFSET_32,
             art::ArtMethod::EntryPointFromQuickCompiledCodeOffset(4).Int32Value())
 
-#define ART_METHOD_QUICK_CODE_OFFSET_64 48
+#define ART_METHOD_QUICK_CODE_OFFSET_64 40
 ADD_TEST_EQ(ART_METHOD_QUICK_CODE_OFFSET_64,
             art::ArtMethod::EntryPointFromQuickCompiledCodeOffset(8).Int32Value())
 
diff --git a/runtime/base/bit_utils.h b/runtime/base/bit_utils.h
index 7972158..6f45dc8 100644
--- a/runtime/base/bit_utils.h
+++ b/runtime/base/bit_utils.h
@@ -137,7 +137,7 @@
 }
 
 template<int n, typename T>
-static inline bool IsAligned(T x) {
+static constexpr bool IsAligned(T x) {
   static_assert((n & (n - 1)) == 0, "n is not a power of two");
   return (x & (n - 1)) == 0;
 }
diff --git a/runtime/class_linker.cc b/runtime/class_linker.cc
index 23c5942..0694227 100644
--- a/runtime/class_linker.cc
+++ b/runtime/class_linker.cc
@@ -1195,13 +1195,9 @@
       if (kIsDebugBuild && !method->IsRuntimeMethod()) {
         CHECK(method->GetDeclaringClass() != nullptr);
       }
-      if (!method->IsNative()) {
-        method->SetEntryPointFromInterpreterPtrSize(
-            artInterpreterToInterpreterBridge, image_pointer_size_);
-        if (!method->IsRuntimeMethod() && method != runtime->GetResolutionMethod()) {
-          method->SetEntryPointFromQuickCompiledCodePtrSize(GetQuickToInterpreterBridge(),
-                                                            image_pointer_size_);
-        }
+      if (!method->IsNative() && !method->IsRuntimeMethod() && !method->IsResolutionMethod()) {
+        method->SetEntryPointFromQuickCompiledCodePtrSize(GetQuickToInterpreterBridge(),
+                                                          image_pointer_size_);
       }
     }
   }
@@ -2206,11 +2202,6 @@
 
   // Install entry point from interpreter.
   bool enter_interpreter = NeedsInterpreter(method, method->GetEntryPointFromQuickCompiledCode());
-  if (enter_interpreter && !method->IsNative()) {
-    method->SetEntryPointFromInterpreter(artInterpreterToInterpreterBridge);
-  } else {
-    method->SetEntryPointFromInterpreter(artInterpreterToCompiledCodeBridge);
-  }
 
   if (method->IsAbstract()) {
     method->SetEntryPointFromQuickCompiledCode(GetQuickToInterpreterBridge());
@@ -3516,7 +3507,6 @@
   // At runtime the method looks like a reference and argument saving method, clone the code
   // related parameters from this method.
   out->SetEntryPointFromQuickCompiledCode(GetQuickProxyInvokeHandler());
-  out->SetEntryPointFromInterpreter(artInterpreterToCompiledCodeBridge);
 }
 
 void ClassLinker::CheckProxyMethod(ArtMethod* method, ArtMethod* prototype) const {
@@ -5647,18 +5637,15 @@
                                                const void* method_code) const {
   OatFile::OatMethod oat_method = CreateOatMethod(method_code);
   oat_method.LinkMethod(method);
-  method->SetEntryPointFromInterpreter(artInterpreterToCompiledCodeBridge);
 }
 
 void ClassLinker::SetEntryPointsToInterpreter(ArtMethod* method) const {
   if (!method->IsNative()) {
-    method->SetEntryPointFromInterpreter(artInterpreterToInterpreterBridge);
     method->SetEntryPointFromQuickCompiledCode(GetQuickToInterpreterBridge());
   } else {
     const void* quick_method_code = GetQuickGenericJniStub();
     OatFile::OatMethod oat_method = CreateOatMethod(quick_method_code);
     oat_method.LinkMethod(method);
-    method->SetEntryPointFromInterpreter(artInterpreterToCompiledCodeBridge);
   }
 }
 
diff --git a/runtime/fault_handler.cc b/runtime/fault_handler.cc
index 762f061..5f91566 100644
--- a/runtime/fault_handler.cc
+++ b/runtime/fault_handler.cc
@@ -320,7 +320,7 @@
     return false;
   }
 
-  ArtMethod* method_obj = 0;
+  ArtMethod* method_obj = nullptr;
   uintptr_t return_pc = 0;
   uintptr_t sp = 0;
 
@@ -331,7 +331,9 @@
   // If we don't have a potential method, we're outta here.
   VLOG(signals) << "potential method: " << method_obj;
   // TODO: Check linear alloc and image.
-  if (method_obj == 0 || !IsAligned<kObjectAlignment>(method_obj)) {
+  DCHECK(IsAligned<sizeof(void*)>(ArtMethod::ObjectSize(sizeof(void*))))
+      << "ArtMethod is not pointer aligned";
+  if (method_obj == nullptr || !IsAligned<sizeof(void*)>(method_obj)) {
     VLOG(signals) << "no method";
     return false;
   }
diff --git a/runtime/instrumentation.cc b/runtime/instrumentation.cc
index d37ddcb..abe9dc2 100644
--- a/runtime/instrumentation.cc
+++ b/runtime/instrumentation.cc
@@ -99,19 +99,6 @@
     }
   }
   method->SetEntryPointFromQuickCompiledCode(quick_code);
-  if (!method->IsResolutionMethod()) {
-    ClassLinker* class_linker = Runtime::Current()->GetClassLinker();
-    if (class_linker->IsQuickToInterpreterBridge(quick_code) ||
-        (class_linker->IsQuickResolutionStub(quick_code) &&
-         Runtime::Current()->GetInstrumentation()->IsForcedInterpretOnly() &&
-         !method->IsNative() && !method->IsProxyMethod())) {
-      DCHECK(!method->IsNative()) << PrettyMethod(method);
-      DCHECK(!method->IsProxyMethod()) << PrettyMethod(method);
-      method->SetEntryPointFromInterpreter(art::artInterpreterToInterpreterBridge);
-    } else {
-      method->SetEntryPointFromInterpreter(art::artInterpreterToCompiledCodeBridge);
-    }
-  }
 }
 
 void Instrumentation::InstallStubsForMethod(ArtMethod* method) {
diff --git a/runtime/interpreter/interpreter_common.cc b/runtime/interpreter/interpreter_common.cc
index fa103b1..0980ea1 100644
--- a/runtime/interpreter/interpreter_common.cc
+++ b/runtime/interpreter/interpreter_common.cc
@@ -19,6 +19,7 @@
 #include <cmath>
 
 #include "debugger.h"
+#include "entrypoints/runtime_asm_entrypoints.h"
 #include "mirror/array-inl.h"
 #include "unstarted_runtime.h"
 #include "verifier/method_verifier.h"
@@ -490,6 +491,23 @@
                                 uint32_t arg[Instruction::kMaxVarArgRegs],
                                 uint32_t vregC) ALWAYS_INLINE;
 
+SHARED_LOCKS_REQUIRED(Locks::mutator_lock_)
+static inline bool NeedsInterpreter(Thread* self, ShadowFrame* new_shadow_frame) ALWAYS_INLINE;
+
+static inline bool NeedsInterpreter(Thread* self, ShadowFrame* new_shadow_frame) {
+  ArtMethod* target = new_shadow_frame->GetMethod();
+  if (UNLIKELY(target->IsNative() || target->IsProxyMethod())) {
+    return false;
+  }
+  Runtime* runtime = Runtime::Current();
+  ClassLinker* class_linker = runtime->GetClassLinker();
+  return runtime->GetInstrumentation()->IsForcedInterpretOnly() ||
+        // Doing this check avoids doing compiled/interpreter transitions.
+        class_linker->IsQuickToInterpreterBridge(target->GetEntryPointFromQuickCompiledCode()) ||
+        // Force the use of interpreter when it is required by the debugger.
+        Dbg::IsForcedInterpreterNeededForCalling(self, target);
+}
+
 template<bool is_range, bool do_assignability_check>
 static inline bool DoCallCommon(ArtMethod* called_method,
                                 Thread* self,
@@ -660,28 +678,11 @@
 
   // Do the call now.
   if (LIKELY(Runtime::Current()->IsStarted())) {
-    if (kIsDebugBuild && new_shadow_frame->GetMethod()->GetEntryPointFromInterpreter() == nullptr) {
-      LOG(FATAL) << "Attempt to invoke non-executable method: "
-          << PrettyMethod(new_shadow_frame->GetMethod());
-      UNREACHABLE();
-    }
-    if (kIsDebugBuild && Runtime::Current()->GetInstrumentation()->IsForcedInterpretOnly() &&
-        !new_shadow_frame->GetMethod()->IsNative() &&
-        !new_shadow_frame->GetMethod()->IsProxyMethod() &&
-        new_shadow_frame->GetMethod()->GetEntryPointFromInterpreter()
-            == artInterpreterToCompiledCodeBridge) {
-      LOG(FATAL) << "Attempt to call compiled code when -Xint: "
-          << PrettyMethod(new_shadow_frame->GetMethod());
-      UNREACHABLE();
-    }
-    // Force the use of interpreter when it is required by the debugger.
-    EntryPointFromInterpreter* entry;
-    if (UNLIKELY(Dbg::IsForcedInterpreterNeededForCalling(self, new_shadow_frame->GetMethod()))) {
-      entry = &art::artInterpreterToInterpreterBridge;
+    if (NeedsInterpreter(self, new_shadow_frame)) {
+      artInterpreterToInterpreterBridge(self, code_item, new_shadow_frame, result);
     } else {
-      entry = new_shadow_frame->GetMethod()->GetEntryPointFromInterpreter();
+      artInterpreterToCompiledCodeBridge(self, code_item, new_shadow_frame, result);
     }
-    entry(self, code_item, new_shadow_frame, result);
   } else {
     UnstartedRuntime::Invoke(self, code_item, new_shadow_frame, result, first_dest_reg);
   }
diff --git a/runtime/jit/jit.cc b/runtime/jit/jit.cc
index bc9545b..fda97db 100644
--- a/runtime/jit/jit.cc
+++ b/runtime/jit/jit.cc
@@ -132,11 +132,7 @@
     VLOG(jit) << "JIT not compiling " << PrettyMethod(method) << " due to breakpoint";
     return false;
   }
-  const bool result = jit_compile_method_(jit_compiler_handle_, method, self);
-  if (result) {
-    method->SetEntryPointFromInterpreter(artInterpreterToCompiledCodeBridge);
-  }
-  return result;
+  return jit_compile_method_(jit_compiler_handle_, method, self);
 }
 
 void Jit::CreateThreadPool() {
diff --git a/runtime/oat.h b/runtime/oat.h
index 000ae8e..5706c4e 100644
--- a/runtime/oat.h
+++ b/runtime/oat.h
@@ -32,7 +32,7 @@
 class PACKED(4) OatHeader {
  public:
   static constexpr uint8_t kOatMagic[] = { 'o', 'a', 't', '\n' };
-  static constexpr uint8_t kOatVersion[] = { '0', '6', '4', '\0' };
+  static constexpr uint8_t kOatVersion[] = { '0', '6', '5', '\0' };
 
   static constexpr const char* kImageLocationKey = "image-location";
   static constexpr const char* kDex2OatCmdLineKey = "dex2oat-cmdline";
diff --git a/runtime/stack.cc b/runtime/stack.cc
index 11c94db..6f3b0a3 100644
--- a/runtime/stack.cc
+++ b/runtime/stack.cc
@@ -857,7 +857,6 @@
               << " native=" << method->IsNative()
               << " entrypoints=" << method->GetEntryPointFromQuickCompiledCode()
               << "," << method->GetEntryPointFromJni()
-              << "," << method->GetEntryPointFromInterpreter()
               << " next=" << *cur_quick_frame_;
         }