/*

 * Copyright (c) 2011, 2016, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

#ifndef SHARE_VM_JVMCI_JVMCI_CODE_INSTALLER_HPP

#define SHARE_VM_JVMCI_JVMCI_CODE_INSTALLER_HPP

#include "jvmci/jvmciCompiler.hpp"

#include "jvmci/jvmciEnv.hpp"

#include "code/nativeInst.hpp"

class RelocBuffer : public StackObj {

  enum { stack_size = 1024 };

public:

  RelocBuffer() : _size(0), _buffer(0) {}

  ~RelocBuffer();

  void ensure_size(size_t bytes);

  void set_size(size_t bytes);

  address begin() const;

  size_t size() const { return _size; }

private:

  size_t _size;

  char _static_buffer[stack_size];

  char *_buffer;

};

class CodeMetadata {

public:

  CodeMetadata() {}

  CodeBlob* get_code_blob() const { return _cb; }

  PcDesc* get_pc_desc() const { return _pc_desc; }

  int get_nr_pc_desc() const { return _nr_pc_desc; }

  u_char* get_scopes_desc() const { return _scopes_desc; }

  int get_scopes_size() const { return _nr_scopes_desc; }

  RelocBuffer* get_reloc_buffer() { return &_reloc_buffer; }

  ExceptionHandlerTable* get_exception_table() { return _exception_table; }

  void set_pc_desc(PcDesc* desc, int count) {

    _pc_desc = desc;

    _nr_pc_desc = count;

  }

  void set_scopes(u_char* scopes, int size) {

    _scopes_desc = scopes;

    _nr_scopes_desc = size;

  }

  void set_exception_table(ExceptionHandlerTable* table) {

    _exception_table = table;

  }

private:

  CodeBlob* _cb;

  PcDesc* _pc_desc;

  int _nr_pc_desc;

  u_char* _scopes_desc;

  int _nr_scopes_desc;

  RelocBuffer _reloc_buffer;

  ExceptionHandlerTable* _exception_table;

};

/*

 * This class handles the conversion from a InstalledCode to a CodeBlob or an nmethod.

 */

class CodeInstaller : public StackObj {

  friend class JVMCIVMStructs;

private:

  enum MarkId {

  };

  Arena         _arena;

  jobject       _data_section_handle;

  jobject       _data_section_patches_handle;

  jobject       _sites_handle;

  CodeOffsets   _offsets;

  jobject       _code_handle;

  jint          _code_size;

  jint          _total_frame_size;

  jint          _orig_pc_offset;

  jint          _parameter_count;

  jint          _constants_size;

#ifndef PRODUCT

  jobject       _comments_handle;

#endif

  bool          _has_wide_vector;

  jobject       _word_kind_handle;

  MarkId        _next_call_type;

  address       _invoke_mark_pc;

  CodeSection*  _instructions;

  CodeSection*  _constants;

  OopRecorder*              _oop_recorder;

  DebugInformationRecorder* _debug_recorder;

  Dependencies*             _dependencies;

  ExceptionHandlerTable     _exception_handler_table;

  static ConstantOopWriteValue* _oop_null_scope_value;

  static ConstantIntValue*    _int_m1_scope_value;

  static ConstantIntValue*    _int_0_scope_value;

  static ConstantIntValue*    _int_1_scope_value;

  static ConstantIntValue*    _int_2_scope_value;

  static LocationValue*       _illegal_value;

  jint pd_next_offset(NativeInstruction* inst, jint pc_offset, Handle method, TRAPS);

  void pd_patch_OopConstant(int pc_offset, Handle constant, TRAPS);

  void pd_patch_MetaspaceConstant(int pc_offset, Handle constant, TRAPS);

  void pd_patch_DataSectionReference(int pc_offset, int data_offset, TRAPS);

  void pd_relocate_ForeignCall(NativeInstruction* inst, jlong foreign_call_destination, TRAPS);

  void pd_relocate_JavaMethod(Handle method, jint pc_offset, TRAPS);

  void pd_relocate_poll(address pc, jint mark, TRAPS);

  objArrayOop sites() { return (objArrayOop) JNIHandles::resolve(_sites_handle); }

  arrayOop code() { return (arrayOop) JNIHandles::resolve(_code_handle); }

  arrayOop data_section() { return (arrayOop) JNIHandles::resolve(_data_section_handle); }

  objArrayOop data_section_patches() { return (objArrayOop) JNIHandles::resolve(_data_section_patches_handle); }

#ifndef PRODUCT

  objArrayOop comments() { return (objArrayOop) JNIHandles::resolve(_comments_handle); }

#endif

  oop word_kind() { return (oop) JNIHandles::resolve(_word_kind_handle); }

public:

  JVMCIEnv::CodeInstallResult gather_metadata(Handle target, Handle compiled_code, CodeMetadata& metadata, TRAPS);

  JVMCIEnv::CodeInstallResult install(JVMCICompiler* compiler, Handle target, Handle compiled_code, CodeBlob*& cb, Handle installed_code, Handle speculation_log, TRAPS);

  static address runtime_call_target_address(oop runtime_call);

  static VMReg get_hotspot_reg(jint jvmciRegisterNumber, TRAPS);

  static bool is_general_purpose_reg(VMReg hotspotRegister);

  const OopMapSet* oopMapSet() const { return _debug_recorder->_oopmaps; }

protected:

  Location::Type get_oop_type(Handle value);

  ScopeValue* get_scope_value(Handle value, BasicType type, GrowableArray<ScopeValue*>* objects, ScopeValue* &second, TRAPS);

  MonitorValue* get_monitor_value(Handle value, GrowableArray<ScopeValue*>* objects, TRAPS);

  void* record_metadata_reference(CodeSection* section, address dest, Handle constant, TRAPS);

#ifdef _LP64

  narrowKlass record_narrow_metadata_reference(CodeSection* section, address dest, Handle constant, TRAPS);

#endif

  // extract the fields of the HotSpotCompiledCode

  void initialize_fields(oop target, oop target_method, TRAPS);

  void initialize_dependencies(oop target_method, OopRecorder* oop_recorder, TRAPS);

  int estimate_stubs_size(TRAPS);

  // perform data and call relocation on the CodeBuffer

  JVMCIEnv::CodeInstallResult initialize_buffer(CodeBuffer& buffer, TRAPS);

  void assumption_NoFinalizableSubclass(Handle assumption);

  void assumption_ConcreteSubtype(Handle assumption);

  void assumption_LeafType(Handle assumption);

  void assumption_ConcreteMethod(Handle assumption);

  void assumption_CallSiteTargetValue(Handle assumption);

  void site_Safepoint(CodeBuffer& buffer, jint pc_offset, Handle site, TRAPS);

  void site_Infopoint(CodeBuffer& buffer, jint pc_offset, Handle site, TRAPS);

  void site_Call(CodeBuffer& buffer, jint pc_offset, Handle site, TRAPS);

  void site_DataPatch(CodeBuffer& buffer, jint pc_offset, Handle site, TRAPS);

  void site_Mark(CodeBuffer& buffer, jint pc_offset, Handle site, TRAPS);

  void site_ExceptionHandler(jint pc_offset, Handle site);

  OopMap* create_oop_map(Handle debug_info, TRAPS);

  /**

   * Specifies the level of detail to record for a scope.

   */

  enum ScopeMode {

    // Only record a method and BCI

    BytecodePosition,

    // Record a method, bci and JVM frame state

    FullFrame

  };

  void record_scope(jint pc_offset, Handle debug_info, ScopeMode scope_mode, TRAPS);

  void record_scope(jint pc_offset, Handle position, ScopeMode scope_mode, GrowableArray<ScopeValue*>* objects, TRAPS);

  void record_object_value(ObjectValue* sv, Handle value, GrowableArray<ScopeValue*>* objects, TRAPS);

  GrowableArray<ScopeValue*>* record_virtual_objects(Handle debug_info, TRAPS);

  int estimateStubSpace(int static_call_stubs);

};

/**

 * Gets the Method metaspace object from a HotSpotResolvedJavaMethodImpl Java object.

 */

Method* getMethodFromHotSpotMethod(oop hotspot_method);

#endif // SHARE_VM_JVMCI_JVMCI_CODE_INSTALLER_HPP