upload android base code part3

android/art/runtime/quick_exception_handler.h

@@ -0,0 +1,171 @@
+/*
+ * Copyright (C) 2014 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef ART_RUNTIME_QUICK_EXCEPTION_HANDLER_H_
+#define ART_RUNTIME_QUICK_EXCEPTION_HANDLER_H_
+
+#include "base/logging.h"
+#include "base/macros.h"
+#include "base/mutex.h"
+#include "deoptimization_kind.h"
+#include "stack_reference.h"
+
+namespace art {
+
+namespace mirror {
+class Throwable;
+}  // namespace mirror
+class ArtMethod;
+class Context;
+class OatQuickMethodHeader;
+class Thread;
+class ShadowFrame;
+class StackVisitor;
+
+// Manages exception delivery for Quick backend.
+class QuickExceptionHandler {
+ public:
+  QuickExceptionHandler(Thread* self, bool is_deoptimization)
+      REQUIRES_SHARED(Locks::mutator_lock_);
+
+  NO_RETURN ~QuickExceptionHandler() {
+    LOG(FATAL) << "UNREACHABLE";  // Expected to take long jump.
+    UNREACHABLE();
+  }
+
+  // Find the catch handler for the given exception.
+  void FindCatch(ObjPtr<mirror::Throwable> exception) REQUIRES_SHARED(Locks::mutator_lock_);
+
+  // Deoptimize the stack to the upcall/some code that's not deoptimizeable. For
+  // every compiled frame, we create a "copy" shadow frame that will be executed
+  // with the interpreter.
+  void DeoptimizeStack() REQUIRES_SHARED(Locks::mutator_lock_);
+
+  // Deoptimize a single frame. It's directly triggered from compiled code. It
+  // has the following properties:
+  // - It deoptimizes a single frame, which can include multiple inlined frames.
+  // - It doesn't have return result or pending exception at the deoptimization point.
+  // - It always deoptimizes, even if IsDeoptimizeable() returns false for the
+  //   code, since HDeoptimize always saves the full environment. So it overrides
+  //   the result of IsDeoptimizeable().
+  // - It can be either full-fragment, or partial-fragment deoptimization, depending
+  //   on whether that single frame covers full or partial fragment.
+  void DeoptimizeSingleFrame(DeoptimizationKind kind) REQUIRES_SHARED(Locks::mutator_lock_);
+
+  void DeoptimizePartialFragmentFixup(uintptr_t return_pc)
+      REQUIRES_SHARED(Locks::mutator_lock_);
+
+  // Update the instrumentation stack by removing all methods that will be unwound
+  // by the exception being thrown.
+  // Return the return pc of the last frame that's unwound.
+  uintptr_t UpdateInstrumentationStack() REQUIRES_SHARED(Locks::mutator_lock_);
+
+  // Set up environment before delivering an exception to optimized code.
+  void SetCatchEnvironmentForOptimizedHandler(StackVisitor* stack_visitor)
+      REQUIRES_SHARED(Locks::mutator_lock_);
+
+  // Long jump either to a catch handler or to the upcall.
+  NO_RETURN void DoLongJump(bool smash_caller_saves = true) REQUIRES_SHARED(Locks::mutator_lock_);
+
+  void SetHandlerQuickFrame(ArtMethod** handler_quick_frame) {
+    handler_quick_frame_ = handler_quick_frame;
+  }
+
+  void SetHandlerQuickFramePc(uintptr_t handler_quick_frame_pc) {
+    handler_quick_frame_pc_ = handler_quick_frame_pc;
+  }
+
+  void SetHandlerMethodHeader(const OatQuickMethodHeader* handler_method_header) {
+    handler_method_header_ = handler_method_header;
+  }
+
+  void SetHandlerQuickArg0(uintptr_t handler_quick_arg0) {
+    handler_quick_arg0_ = handler_quick_arg0;
+  }
+
+  ArtMethod* GetHandlerMethod() const {
+    return handler_method_;
+  }
+
+  void SetHandlerMethod(ArtMethod* handler_quick_method) {
+    handler_method_ = handler_quick_method;
+  }
+
+  uint32_t GetHandlerDexPc() const {
+    return handler_dex_pc_;
+  }
+
+  void SetHandlerDexPc(uint32_t dex_pc) {
+    handler_dex_pc_ = dex_pc;
+  }
+
+  void SetClearException(bool clear_exception) {
+    clear_exception_ = clear_exception;
+  }
+
+  void SetHandlerFrameDepth(size_t frame_depth) {
+    handler_frame_depth_ = frame_depth;
+  }
+
+  bool IsFullFragmentDone() const {
+    return full_fragment_done_;
+  }
+
+  void SetFullFragmentDone(bool full_fragment_done) {
+    full_fragment_done_ = full_fragment_done;
+  }
+
+  // Walk the stack frames of the given thread, printing out non-runtime methods with their types
+  // of frames. Helps to verify that partial-fragment deopt really works as expected.
+  static void DumpFramesWithType(Thread* self, bool details = false)
+      REQUIRES_SHARED(Locks::mutator_lock_);
+
+ private:
+  Thread* const self_;
+  Context* const context_;
+  // Should we deoptimize the stack?
+  const bool is_deoptimization_;
+  // Is method tracing active?
+  const bool method_tracing_active_;
+  // Quick frame with found handler or last frame if no handler found.
+  ArtMethod** handler_quick_frame_;
+  // PC to branch to for the handler.
+  uintptr_t handler_quick_frame_pc_;
+  // Quick code of the handler.
+  const OatQuickMethodHeader* handler_method_header_;
+  // The value for argument 0.
+  uintptr_t handler_quick_arg0_;
+  // The handler method to report to the debugger.
+  ArtMethod* handler_method_;
+  // The handler's dex PC, zero implies an uncaught exception.
+  uint32_t handler_dex_pc_;
+  // Should the exception be cleared as the catch block has no move-exception?
+  bool clear_exception_;
+  // Frame depth of the catch handler or the upcall.
+  size_t handler_frame_depth_;
+  // Does the handler successfully walk the full fragment (not stopped
+  // by some code that's not deoptimizeable)? Even single-frame deoptimization
+  // can set this to true if the fragment contains only one quick frame.
+  bool full_fragment_done_;
+
+  void PrepareForLongJumpToInvokeStubOrInterpreterBridge()
+      REQUIRES_SHARED(Locks::mutator_lock_);
+
+  DISALLOW_COPY_AND_ASSIGN(QuickExceptionHandler);
+};
+
+}  // namespace art
+#endif  // ART_RUNTIME_QUICK_EXCEPTION_HANDLER_H_