/*

 * Copyright (c) 1998, 2014, 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.

 *

 */

#include "precompiled.hpp"

#include "code/codeBlob.hpp"

#include "code/codeCache.hpp"

#include "code/relocInfo.hpp"

#include "compiler/disassembler.hpp"

#include "interpreter/bytecode.hpp"

#include "memory/allocation.inline.hpp"

#include "memory/heap.hpp"

#include "oops/oop.inline.hpp"

#include "prims/forte.hpp"

#include "runtime/handles.inline.hpp"

#include "runtime/interfaceSupport.hpp"

#include "runtime/mutexLocker.hpp"

#include "runtime/safepoint.hpp"

#include "runtime/sharedRuntime.hpp"

#include "runtime/vframe.hpp"

#include "services/memoryService.hpp"

#ifdef COMPILER1

#include "c1/c1_Runtime1.hpp"

#endif

unsigned int align_code_offset(int offset) {

  // align the size to CodeEntryAlignment

  return

    ((offset + (int)CodeHeap::header_size() + (CodeEntryAlignment-1)) & ~(CodeEntryAlignment-1))

    - (int)CodeHeap::header_size();

}

// This must be consistent with the CodeBlob constructor's layout actions.

unsigned int CodeBlob::allocation_size(CodeBuffer* cb, int header_size) {

  unsigned int size = header_size;

  size += round_to(cb->total_relocation_size(), oopSize);

  // align the size to CodeEntryAlignment

  size = align_code_offset(size);

  size += round_to(cb->total_content_size(), oopSize);

  size += round_to(cb->total_oop_size(), oopSize);

  size += round_to(cb->total_metadata_size(), oopSize);

  return size;

}

// Creates a simple CodeBlob. Sets up the size of the different regions.

CodeBlob::CodeBlob(const char* name, int header_size, int size, int frame_complete, int locs_size) {

  assert(size        == round_to(size,        oopSize), "unaligned size");

  assert(locs_size   == round_to(locs_size,   oopSize), "unaligned size");

  assert(header_size == round_to(header_size, oopSize), "unaligned size");

  assert(!UseRelocIndex, "no space allocated for reloc index yet");

  // Note: If UseRelocIndex is enabled, there needs to be (at least) one

  //       extra word for the relocation information, containing the reloc

  //       index table length. Unfortunately, the reloc index table imple-

  //       mentation is not easily understandable and thus it is not clear

  //       what exactly the format is supposed to be. For now, we just turn

  //       off the use of this table (gri 7/6/2000).

  _name                  = name;

  _size                  = size;

  _frame_complete_offset = frame_complete;

  _header_size           = header_size;

  _relocation_size       = locs_size;

  _content_offset        = align_code_offset(header_size + _relocation_size);

  _code_offset           = _content_offset;

  _data_offset           = size;

  _frame_size            =  0;

  set_oop_maps(NULL);

}

// Creates a CodeBlob from a CodeBuffer. Sets up the size of the different regions,

// and copy code and relocation info.

CodeBlob::CodeBlob(

  const char* name,

  CodeBuffer* cb,

  int         header_size,

  int         size,

  int         frame_complete,

  int         frame_size,

  OopMapSet*  oop_maps

) {

  assert(size        == round_to(size,        oopSize), "unaligned size");

  assert(header_size == round_to(header_size, oopSize), "unaligned size");

  _name                  = name;

  _size                  = size;

  _frame_complete_offset = frame_complete;

  _header_size           = header_size;

  _relocation_size       = round_to(cb->total_relocation_size(), oopSize);

  _content_offset        = align_code_offset(header_size + _relocation_size);

  _code_offset           = _content_offset + cb->total_offset_of(cb->insts());

  _data_offset           = _content_offset + round_to(cb->total_content_size(), oopSize);

  assert(_data_offset <= size, "codeBlob is too small");

  cb->copy_code_and_locs_to(this);

  set_oop_maps(oop_maps);

  _frame_size = frame_size;

#ifdef COMPILER1

  // probably wrong for tiered

  assert(_frame_size >= -1, "must use frame size or -1 for runtime stubs");

#endif // COMPILER1

}

void CodeBlob::set_oop_maps(OopMapSet* p) {

  // Danger Will Robinson! This method allocates a big

  // chunk of memory, its your job to free it.

  if (p != NULL) {

    // We need to allocate a chunk big enough to hold the OopMapSet and all of its OopMaps

    _oop_maps = (OopMapSet* )NEW_C_HEAP_ARRAY(unsigned char, p->heap_size(), mtCode);

    p->copy_to((address)_oop_maps);

  } else {

    _oop_maps = NULL;

  }

}

void CodeBlob::trace_new_stub(CodeBlob* stub, const char* name1, const char* name2) {

  // Do not hold the CodeCache lock during name formatting.

  assert(!CodeCache_lock->owned_by_self(), "release CodeCache before registering the stub");

  if (stub != NULL) {

    char stub_id[256];

    assert(strlen(name1) + strlen(name2) < sizeof(stub_id), "");

    jio_snprintf(stub_id, sizeof(stub_id), "%s%s", name1, name2);

    if (PrintStubCode) {

      ttyLocker ttyl;

      tty->print_cr("Decoding %s " INTPTR_FORMAT, stub_id, (intptr_t) stub);

      Disassembler::decode(stub->code_begin(), stub->code_end());

      tty->cr();

    }

    Forte::register_stub(stub_id, stub->code_begin(), stub->code_end());

    if (JvmtiExport::should_post_dynamic_code_generated()) {

      const char* stub_name = name2;

      if (name2[0] == '\0')  stub_name = name1;

      JvmtiExport::post_dynamic_code_generated(stub_name, stub->code_begin(), stub->code_end());

    }

  }

  // Track memory usage statistic after releasing CodeCache_lock

  MemoryService::track_code_cache_memory_usage();

}

void CodeBlob::flush() {

  if (_oop_maps) {

    FREE_C_HEAP_ARRAY(unsigned char, _oop_maps, mtCode);

    _oop_maps = NULL;

  }

  _strings.free();

}

OopMap* CodeBlob::oop_map_for_return_address(address return_address) {

  assert(oop_maps() != NULL, "nope");

  return oop_maps()->find_map_at_offset((intptr_t) return_address - (intptr_t) code_begin());

}

//----------------------------------------------------------------------------------------------------

// Implementation of BufferBlob

BufferBlob::BufferBlob(const char* name, int size)

: CodeBlob(name, sizeof(BufferBlob), size, CodeOffsets::frame_never_safe, /*locs_size:*/ 0)

{}

BufferBlob* BufferBlob::create(const char* name, int buffer_size) {

  ThreadInVMfromUnknown __tiv;  // get to VM state in case we block on CodeCache_lock

  BufferBlob* blob = NULL;

  unsigned int size = sizeof(BufferBlob);

  // align the size to CodeEntryAlignment

  size = align_code_offset(size);

  size += round_to(buffer_size, oopSize);

  assert(name != NULL, "must provide a name");

  {

    MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);

    blob = new (size) BufferBlob(name, size);

  }

  // Track memory usage statistic after releasing CodeCache_lock

  MemoryService::track_code_cache_memory_usage();

  return blob;

}

BufferBlob::BufferBlob(const char* name, int size, CodeBuffer* cb)

  : CodeBlob(name, cb, sizeof(BufferBlob), size, CodeOffsets::frame_never_safe, 0, NULL)

{}

BufferBlob* BufferBlob::create(const char* name, CodeBuffer* cb) {

  ThreadInVMfromUnknown __tiv;  // get to VM state in case we block on CodeCache_lock

  BufferBlob* blob = NULL;

  unsigned int size = allocation_size(cb, sizeof(BufferBlob));

  assert(name != NULL, "must provide a name");

  {

    MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);

    blob = new (size) BufferBlob(name, size, cb);

  }

  // Track memory usage statistic after releasing CodeCache_lock

  MemoryService::track_code_cache_memory_usage();

  return blob;

}

void* BufferBlob::operator new(size_t s, unsigned size, bool is_critical) throw() {

  void* p = CodeCache::allocate(size, is_critical);

  return p;

}

void BufferBlob::free( BufferBlob *blob ) {

  ThreadInVMfromUnknown __tiv;  // get to VM state in case we block on CodeCache_lock

  {

    MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);

    CodeCache::free((CodeBlob*)blob);

  }

  // Track memory usage statistic after releasing CodeCache_lock

  MemoryService::track_code_cache_memory_usage();

}

//----------------------------------------------------------------------------------------------------

// Implementation of AdapterBlob

AdapterBlob::AdapterBlob(int size, CodeBuffer* cb) :

  BufferBlob("I2C/C2I adapters", size, cb) {

  CodeCache::commit(this);

}

AdapterBlob* AdapterBlob::create(CodeBuffer* cb) {

  ThreadInVMfromUnknown __tiv;  // get to VM state in case we block on CodeCache_lock

  AdapterBlob* blob = NULL;

  unsigned int size = allocation_size(cb, sizeof(AdapterBlob));

  {

    MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);

    // The parameter 'true' indicates a critical memory allocation.

    // This means that CodeCacheMinimumFreeSpace is used, if necessary

    const bool is_critical = true;

    blob = new (size, is_critical) AdapterBlob(size, cb);

  }

  // Track memory usage statistic after releasing CodeCache_lock

  MemoryService::track_code_cache_memory_usage();

  return blob;

}

//----------------------------------------------------------------------------------------------------

// Implementation of MethodHandlesAdapterBlob

MethodHandlesAdapterBlob* MethodHandlesAdapterBlob::create(int buffer_size) {

  ThreadInVMfromUnknown __tiv;  // get to VM state in case we block on CodeCache_lock

  MethodHandlesAdapterBlob* blob = NULL;

  unsigned int size = sizeof(MethodHandlesAdapterBlob);

  // align the size to CodeEntryAlignment

  size = align_code_offset(size);

  size += round_to(buffer_size, oopSize);

  {

    MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);

    // The parameter 'true' indicates a critical memory allocation.

    // This means that CodeCacheMinimumFreeSpace is used, if necessary

    const bool is_critical = true;

    blob = new (size, is_critical) MethodHandlesAdapterBlob(size);

  }

  // Track memory usage statistic after releasing CodeCache_lock

  MemoryService::track_code_cache_memory_usage();

  return blob;

}

//----------------------------------------------------------------------------------------------------

// Implementation of RuntimeStub

RuntimeStub::RuntimeStub(

  const char* name,

  CodeBuffer* cb,

  int         size,

  int         frame_complete,

  int         frame_size,

  OopMapSet*  oop_maps,

  bool        caller_must_gc_arguments

)

: CodeBlob(name, cb, sizeof(RuntimeStub), size, frame_complete, frame_size, oop_maps)

{

  _caller_must_gc_arguments = caller_must_gc_arguments;

}

RuntimeStub* RuntimeStub::new_runtime_stub(const char* stub_name,

                                           CodeBuffer* cb,

                                           int frame_complete,

                                           int frame_size,

                                           OopMapSet* oop_maps,

                                           bool caller_must_gc_arguments)

{

  RuntimeStub* stub = NULL;

  ThreadInVMfromUnknown __tiv;  // get to VM state in case we block on CodeCache_lock

  {

    MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);

    unsigned int size = allocation_size(cb, sizeof(RuntimeStub));

    stub = new (size) RuntimeStub(stub_name, cb, size, frame_complete, frame_size, oop_maps, caller_must_gc_arguments);

  }

  trace_new_stub(stub, "RuntimeStub - ", stub_name);

  return stub;

}

void* RuntimeStub::operator new(size_t s, unsigned size) throw() {

  void* p = CodeCache::allocate(size, true);

  if (!p) fatal("Initial size of CodeCache is too small");

  return p;

}

// operator new shared by all singletons:

void* SingletonBlob::operator new(size_t s, unsigned size) throw() {

  void* p = CodeCache::allocate(size, true);

  if (!p) fatal("Initial size of CodeCache is too small");

  return p;

}

//----------------------------------------------------------------------------------------------------

// Implementation of DeoptimizationBlob

DeoptimizationBlob::DeoptimizationBlob(

  CodeBuffer* cb,

  int         size,

  OopMapSet*  oop_maps,

  int         unpack_offset,

  int         unpack_with_exception_offset,

  int         unpack_with_reexecution_offset,

  int         frame_size

)

: SingletonBlob("DeoptimizationBlob", cb, sizeof(DeoptimizationBlob), size, frame_size, oop_maps)

{

  _unpack_offset           = unpack_offset;

  _unpack_with_exception   = unpack_with_exception_offset;

  _unpack_with_reexecution = unpack_with_reexecution_offset;

#ifdef COMPILER1

  _unpack_with_exception_in_tls   = -1;

#endif

}

DeoptimizationBlob* DeoptimizationBlob::create(

  CodeBuffer* cb,

  OopMapSet*  oop_maps,

  int        unpack_offset,

  int        unpack_with_exception_offset,

  int        unpack_with_reexecution_offset,

  int        frame_size)

{

  DeoptimizationBlob* blob = NULL;

  ThreadInVMfromUnknown __tiv;  // get to VM state in case we block on CodeCache_lock

  {

    MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);

    unsigned int size = allocation_size(cb, sizeof(DeoptimizationBlob));

    blob = new (size) DeoptimizationBlob(cb,

                                         size,

                                         oop_maps,

                                         unpack_offset,

                                         unpack_with_exception_offset,

                                         unpack_with_reexecution_offset,

                                         frame_size);

  }

  trace_new_stub(blob, "DeoptimizationBlob");

  return blob;

}

//----------------------------------------------------------------------------------------------------

// Implementation of UncommonTrapBlob

#ifdef COMPILER2

UncommonTrapBlob::UncommonTrapBlob(

  CodeBuffer* cb,

  int         size,

  OopMapSet*  oop_maps,

  int         frame_size

)

: SingletonBlob("UncommonTrapBlob", cb, sizeof(UncommonTrapBlob), size, frame_size, oop_maps)

{}

UncommonTrapBlob* UncommonTrapBlob::create(

  CodeBuffer* cb,

  OopMapSet*  oop_maps,

  int        frame_size)

{

  UncommonTrapBlob* blob = NULL;

  ThreadInVMfromUnknown __tiv;  // get to VM state in case we block on CodeCache_lock

  {

    MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);

    unsigned int size = allocation_size(cb, sizeof(UncommonTrapBlob));

    blob = new (size) UncommonTrapBlob(cb, size, oop_maps, frame_size);

  }

  trace_new_stub(blob, "UncommonTrapBlob");

  return blob;

}

#endif // COMPILER2

//----------------------------------------------------------------------------------------------------

// Implementation of ExceptionBlob

#ifdef COMPILER2

ExceptionBlob::ExceptionBlob(

  CodeBuffer* cb,

  int         size,

  OopMapSet*  oop_maps,

  int         frame_size

)

: SingletonBlob("ExceptionBlob", cb, sizeof(ExceptionBlob), size, frame_size, oop_maps)

{}

ExceptionBlob* ExceptionBlob::create(

  CodeBuffer* cb,

  OopMapSet*  oop_maps,

  int         frame_size)

{

  ExceptionBlob* blob = NULL;

  ThreadInVMfromUnknown __tiv;  // get to VM state in case we block on CodeCache_lock

  {

    MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);

    unsigned int size = allocation_size(cb, sizeof(ExceptionBlob));

    blob = new (size) ExceptionBlob(cb, size, oop_maps, frame_size);

  }

  trace_new_stub(blob, "ExceptionBlob");

  return blob;

}

#endif // COMPILER2

//----------------------------------------------------------------------------------------------------

// Implementation of SafepointBlob

SafepointBlob::SafepointBlob(

  CodeBuffer* cb,

  int         size,

  OopMapSet*  oop_maps,

  int         frame_size

)

: SingletonBlob("SafepointBlob", cb, sizeof(SafepointBlob), size, frame_size, oop_maps)

{}

SafepointBlob* SafepointBlob::create(

  CodeBuffer* cb,

  OopMapSet*  oop_maps,

  int         frame_size)

{

  SafepointBlob* blob = NULL;

  ThreadInVMfromUnknown __tiv;  // get to VM state in case we block on CodeCache_lock

  {

    MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);

    unsigned int size = allocation_size(cb, sizeof(SafepointBlob));

    blob = new (size) SafepointBlob(cb, size, oop_maps, frame_size);

  }

  trace_new_stub(blob, "SafepointBlob");

  return blob;

}

//----------------------------------------------------------------------------------------------------

// Verification and printing

void CodeBlob::verify() {

  ShouldNotReachHere();