--- a/src/hotspot/share/jfr/jni/jfrJniMethod.cpp	Fri Feb 22 19:58:22 2019 +0530
+++ b/src/hotspot/share/jfr/jni/jfrJniMethod.cpp	Fri Feb 22 17:30:07 2019 +0300
@@ -114,7 +114,7 @@
 NO_TRANSITION_END
 
 NO_TRANSITION(void, jfr_set_file_notification(JNIEnv* env, jobject jvm, jlong threshold))
-  JfrChunkRotation::set_threshold((intptr_t)threshold);
+  JfrChunkRotation::set_threshold(threshold);
 NO_TRANSITION_END
 
 NO_TRANSITION(void, jfr_set_sample_threads(JNIEnv* env, jobject jvm, jboolean sampleThreads))

--- a/src/hotspot/share/jfr/recorder/checkpoint/jfrCheckpointWriter.cpp	Fri Feb 22 19:58:22 2019 +0530
+++ b/src/hotspot/share/jfr/recorder/checkpoint/jfrCheckpointWriter.cpp	Fri Feb 22 17:30:07 2019 +0300
@@ -44,13 +44,13 @@
   }
 }
 
-static void write_checkpoint_header(u1* pos, jlong size, jlong time, bool flushpoint, juint type_count) {
+static void write_checkpoint_header(u1* pos, int64_t size, jlong time, bool flushpoint, u4 type_count) {
   assert(pos != NULL, "invariant");
   JfrBigEndianWriter be_writer(pos, sizeof(JfrCheckpointEntry));
   be_writer.write(size);
   be_writer.write(time);
   be_writer.write(JfrTicks::now().value() - time);
-  be_writer.write(flushpoint ? (juint)1 : (juint)0);
+  be_writer.write(flushpoint ? (u4)1 : (u4)0);
   be_writer.write(type_count);
   assert(be_writer.is_valid(), "invariant");
 }
@@ -71,7 +71,7 @@
   assert(this->is_valid(), "invariant");
   assert(count() > 0, "invariant");
   assert(this->used_size() > sizeof(JfrCheckpointEntry), "invariant");
-  const jlong size = this->current_offset();
+  const int64_t size = this->current_offset();
   assert(size + this->start_pos() == this->current_pos(), "invariant");
   write_checkpoint_header(const_cast<u1*>(this->start_pos()), size, _time, is_flushpoint(), count());
   release();
@@ -85,11 +85,11 @@
   return _flushpoint;
 }
 
-juint JfrCheckpointWriter::count() const {
+u4 JfrCheckpointWriter::count() const {
   return _count;
 }
 
-void JfrCheckpointWriter::set_count(juint count) {
+void JfrCheckpointWriter::set_count(u4 count) {
   _count = count;
 }
 
@@ -111,7 +111,7 @@
 }
 
 void JfrCheckpointWriter::write_key(u8 key) {
-  write<u8>(key);
+  write(key);
 }
 
 void JfrCheckpointWriter::increment() {
@@ -119,10 +119,10 @@
 }
 
 void JfrCheckpointWriter::write_count(u4 nof_entries) {
-  write<u4>((u4)nof_entries);
+  write(nof_entries);
 }
 
-void JfrCheckpointWriter::write_count(u4 nof_entries, jlong offset) {
+void JfrCheckpointWriter::write_count(u4 nof_entries, int64_t offset) {
   write_padded_at_offset(nof_entries, offset);
 }
 

--- a/src/hotspot/share/jfr/recorder/checkpoint/jfrCheckpointWriter.hpp	Fri Feb 22 19:58:22 2019 +0530
+++ b/src/hotspot/share/jfr/recorder/checkpoint/jfrCheckpointWriter.hpp	Fri Feb 22 17:30:07 2019 +0300
@@ -49,21 +49,21 @@
 typedef EventWriterHost<BigEndianEncoder, CompressedIntegerEncoder, JfrTransactionalCheckpointWriter> JfrCheckpointWriterBase;
 
 struct JfrCheckpointContext {
-  jlong offset;
-  juint count;
+  int64_t offset;
+  u4 count;
 };
 
 class JfrCheckpointWriter : public JfrCheckpointWriterBase {
   friend class JfrSerializerRegistration;
  private:
   JfrTicks _time;
-  jlong _offset;
-  juint _count;
+  int64_t _offset;
+  u4 _count;
   bool _flushpoint;
   bool _header;
 
-  juint count() const;
-  void set_count(juint count);
+  u4 count() const;
+  void set_count(u4 count);
   void increment();
   void set_flushpoint(bool flushpoint);
   bool is_flushpoint() const;
@@ -75,7 +75,7 @@
   ~JfrCheckpointWriter();
   void write_type(JfrTypeId type_id);
   void write_count(u4 nof_entries);
-  void write_count(u4 nof_entries, jlong offset);
+  void write_count(u4 nof_entries, int64_t offset);
   void write_key(u8 key);
   const JfrCheckpointContext context() const;
   void set_context(const JfrCheckpointContext ctx);

--- a/src/hotspot/share/jfr/recorder/checkpoint/types/jfrType.cpp	Fri Feb 22 19:58:22 2019 +0530
+++ b/src/hotspot/share/jfr/recorder/checkpoint/types/jfrType.cpp	Fri Feb 22 17:30:07 2019 +0300
@@ -65,7 +65,7 @@
  private:
   JfrCheckpointWriter& _writer;
   JfrCheckpointContext _ctx;
-  const intptr_t _count_position;
+  const int64_t _count_position;
   Thread* const _curthread;
   u4 _count;
 

--- a/src/hotspot/share/jfr/recorder/checkpoint/types/jfrTypeSetWriter.hpp	Fri Feb 22 19:58:22 2019 +0530
+++ b/src/hotspot/share/jfr/recorder/checkpoint/types/jfrTypeSetWriter.hpp	Fri Feb 22 17:30:07 2019 +0300
@@ -35,7 +35,7 @@
   WriterImpl _impl;
   JfrCheckpointWriter* _writer;
   JfrCheckpointContext _ctx;
-  jlong _count_offset;
+  int64_t _count_offset;
   int _count;
   bool _skip_header;
  public:

--- a/src/hotspot/share/jfr/recorder/repository/jfrChunkRotation.cpp	Fri Feb 22 19:58:22 2019 +0530
+++ b/src/hotspot/share/jfr/recorder/repository/jfrChunkRotation.cpp	Fri Feb 22 17:30:07 2019 +0300
@@ -29,7 +29,7 @@
 #include "runtime/handles.inline.hpp"
 
 static jobject chunk_monitor = NULL;
-static intptr_t threshold = 0;
+static int64_t threshold = 0;
 static bool rotate = false;
 
 static jobject install_chunk_monitor(Thread* thread) {
@@ -62,7 +62,6 @@
     // already in progress
     return;
   }
-  assert(!rotate, "invariant");
   if (writer.size_written() > threshold) {
     rotate = true;
     notify();
@@ -77,6 +76,6 @@
   rotate = false;
 }
 
-void JfrChunkRotation::set_threshold(intptr_t bytes) {
+void JfrChunkRotation::set_threshold(int64_t bytes) {
   threshold = bytes;
 }

--- a/src/hotspot/share/jfr/recorder/repository/jfrChunkRotation.hpp	Fri Feb 22 19:58:22 2019 +0530
+++ b/src/hotspot/share/jfr/recorder/repository/jfrChunkRotation.hpp	Fri Feb 22 17:30:07 2019 +0300
@@ -36,7 +36,7 @@
 class JfrChunkRotation : AllStatic {
  public:
   static void evaluate(const JfrChunkWriter& writer);
-  static void set_threshold(intptr_t bytes);
+  static void set_threshold(int64_t bytes);
   static bool should_rotate();
   static void on_rotation();
 };

--- a/src/hotspot/share/jfr/recorder/repository/jfrChunkState.cpp	Fri Feb 22 19:58:22 2019 +0530
+++ b/src/hotspot/share/jfr/recorder/repository/jfrChunkState.cpp	Fri Feb 22 17:30:07 2019 +0300
@@ -53,19 +53,19 @@
   set_previous_checkpoint_offset(0);
 }
 
-void JfrChunkState::set_previous_checkpoint_offset(jlong offset) {
+void JfrChunkState::set_previous_checkpoint_offset(int64_t offset) {
   _previous_checkpoint_offset = offset;
 }
 
-jlong JfrChunkState::previous_checkpoint_offset() const {
+int64_t JfrChunkState::previous_checkpoint_offset() const {
   return _previous_checkpoint_offset;
 }
 
-jlong JfrChunkState::previous_start_ticks() const {
+int64_t JfrChunkState::previous_start_ticks() const {
   return _previous_start_ticks;
 }
 
-jlong JfrChunkState::previous_start_nanos() const {
+int64_t JfrChunkState::previous_start_nanos() const {
   return _previous_start_nanos;
 }
 
@@ -92,7 +92,7 @@
   save_current_and_update_start_ticks();
 }
 
-jlong JfrChunkState::last_chunk_duration() const {
+int64_t JfrChunkState::last_chunk_duration() const {
   return _start_nanos - _previous_start_nanos;
 }
 

--- a/src/hotspot/share/jfr/recorder/repository/jfrChunkState.hpp	Fri Feb 22 19:58:22 2019 +0530
+++ b/src/hotspot/share/jfr/recorder/repository/jfrChunkState.hpp	Fri Feb 22 17:30:07 2019 +0300
@@ -25,7 +25,6 @@
 #ifndef SHARE_JFR_RECORDER_REPOSITORY_JFRCHUNKSTATE_HPP
 #define SHARE_JFR_RECORDER_REPOSITORY_JFRCHUNKSTATE_HPP
 
-#include "jni.h"
 #include "jfr/utilities/jfrAllocation.hpp"
 #include "jfr/utilities/jfrTypes.hpp"
 
@@ -33,11 +32,11 @@
   friend class JfrChunkWriter;
  private:
   char* _path;
-  jlong _start_ticks;
-  jlong _start_nanos;
-  jlong _previous_start_ticks;
-  jlong _previous_start_nanos;
-  jlong _previous_checkpoint_offset;
+  int64_t _start_ticks;
+  int64_t _start_nanos;
+  int64_t _previous_start_ticks;
+  int64_t _previous_start_nanos;
+  int64_t _previous_checkpoint_offset;
 
   void update_start_ticks();
   void update_start_nanos();
@@ -47,11 +46,11 @@
   JfrChunkState();
   ~JfrChunkState();
   void reset();
-  jlong previous_checkpoint_offset() const;
-  void set_previous_checkpoint_offset(jlong offset);
-  jlong previous_start_ticks() const;
-  jlong previous_start_nanos() const;
-  jlong last_chunk_duration() const;
+  int64_t previous_checkpoint_offset() const;
+  void set_previous_checkpoint_offset(int64_t offset);
+  int64_t previous_start_ticks() const;
+  int64_t previous_start_nanos() const;
+  int64_t last_chunk_duration() const;
   void update_time_to_now();
   void set_path(const char* path);
   const char* path() const;

--- a/src/hotspot/share/jfr/recorder/repository/jfrChunkWriter.cpp	Fri Feb 22 19:58:22 2019 +0530
+++ b/src/hotspot/share/jfr/recorder/repository/jfrChunkWriter.cpp	Fri Feb 22 17:30:07 2019 +0300
@@ -32,9 +32,8 @@
 #include "runtime/os.hpp"
 #include "runtime/os.inline.hpp"
 
-const u2 JFR_VERSION_MAJOR = 2;
-const u2 JFR_VERSION_MINOR = 0;
-
+static const u2 JFR_VERSION_MAJOR = 2;
+static const u2 JFR_VERSION_MINOR = 0;
 static const size_t MAGIC_LEN = 4;
 static const size_t FILEHEADER_SLOT_SIZE = 8;
 static const size_t CHUNK_SIZE_OFFSET = 8;
@@ -79,14 +78,14 @@
   return is_open;
 }
 
-size_t JfrChunkWriter::close(intptr_t metadata_offset) {
+size_t JfrChunkWriter::close(int64_t metadata_offset) {
   write_header(metadata_offset);
   this->flush();
   this->close_fd();
-  return size_written();
+  return (size_t)size_written();
 }
 
-void JfrChunkWriter::write_header(intptr_t metadata_offset) {
+void JfrChunkWriter::write_header(int64_t metadata_offset) {
   assert(this->is_valid(), "invariant");
   // Chunk size
   this->write_be_at_offset(size_written(), CHUNK_SIZE_OFFSET);
@@ -106,15 +105,15 @@
   _chunkstate->set_path(chunk_path);
 }
 
-intptr_t JfrChunkWriter::size_written() const {
+int64_t JfrChunkWriter::size_written() const {
   return this->is_valid() ? this->current_offset() : 0;
 }
 
-intptr_t JfrChunkWriter::previous_checkpoint_offset() const {
+int64_t JfrChunkWriter::previous_checkpoint_offset() const {
   return _chunkstate->previous_checkpoint_offset();
 }
 
-void JfrChunkWriter::set_previous_checkpoint_offset(intptr_t offset) {
+void JfrChunkWriter::set_previous_checkpoint_offset(int64_t offset) {
   _chunkstate->set_previous_checkpoint_offset(offset);
 }
 

--- a/src/hotspot/share/jfr/recorder/repository/jfrChunkWriter.hpp	Fri Feb 22 19:58:22 2019 +0530
+++ b/src/hotspot/share/jfr/recorder/repository/jfrChunkWriter.hpp	Fri Feb 22 17:30:07 2019 +0300
@@ -41,16 +41,16 @@
   JfrChunkState* _chunkstate;
 
   bool open();
-  size_t close(intptr_t metadata_offset);
-  void write_header(intptr_t metadata_offset);
+  size_t close(int64_t metadata_offset);
+  void write_header(int64_t metadata_offset);
   void set_chunk_path(const char* chunk_path);
 
  public:
   JfrChunkWriter();
   bool initialize();
-  intptr_t size_written() const;
-  intptr_t previous_checkpoint_offset() const;
-  void set_previous_checkpoint_offset(intptr_t offset);
+  int64_t size_written() const;
+  int64_t previous_checkpoint_offset() const;
+  void set_previous_checkpoint_offset(int64_t offset);
   void time_stamp_chunk_now();
 };
 

--- a/src/hotspot/share/jfr/recorder/repository/jfrRepository.cpp	Fri Feb 22 19:58:22 2019 +0530
+++ b/src/hotspot/share/jfr/recorder/repository/jfrRepository.cpp	Fri Feb 22 17:30:07 2019 +0300
@@ -147,10 +147,10 @@
   iso8601_to_date_time(buffer);
 }
 
-static jlong file_size(fio_fd fd) {
+static int64_t file_size(fio_fd fd) {
   assert(fd != invalid_fd, "invariant");
-  const jlong current_offset = os::current_file_offset(fd);
-  const jlong size = os::lseek(fd, 0, SEEK_END);
+  const int64_t current_offset = os::current_file_offset(fd);
+  const int64_t size = os::lseek(fd, 0, SEEK_END);
   os::seek_to_file_offset(fd, current_offset);
   return size;
 }
@@ -218,7 +218,7 @@
   if (invalid_fd == entry_fd) {
     return NULL;
   }
-  const jlong entry_size = file_size(entry_fd);
+  const int64_t entry_size = file_size(entry_fd);
   os::close(entry_fd);
   if (0 == entry_size) {
     return NULL;
@@ -260,6 +260,7 @@
   }
 }
 #endif
+
 bool RepositoryIterator::has_next() const {
   return (_files != NULL && _iterator < _files->length());
 }
@@ -275,21 +276,27 @@
   if (file_copy_block == NULL) {
     return;
   }
- jlong bytes_written_total = 0;
+ int64_t bytes_written_total = 0;
   while (iterator.has_next()) {
     fio_fd current_fd = invalid_fd;
     const char* const fqn = iterator.next();
     if (fqn != NULL) {
       current_fd = open_existing(fqn);
       if (current_fd != invalid_fd) {
-        const jlong current_filesize = file_size(current_fd);
+        const int64_t current_filesize = file_size(current_fd);
         assert(current_filesize > 0, "invariant");
-        jlong bytes_read = 0;
-        jlong bytes_written = 0;
+        int64_t bytes_read = 0;
+        int64_t bytes_written = 0;
         while (bytes_read < current_filesize) {
-          bytes_read += (jlong)os::read_at(current_fd, file_copy_block, size_of_file_copy_block, bytes_read);
-          assert(bytes_read - bytes_written <= (jlong)size_of_file_copy_block, "invariant");
-          bytes_written += (jlong)os::write(emergency_fd, file_copy_block, bytes_read - bytes_written);
+          const ssize_t read_result = os::read_at(current_fd, file_copy_block, size_of_file_copy_block, bytes_read);
+          if (-1 == read_result) {
+            log_info(jfr) ( // For user, should not be "jfr, system"
+              "Unable to recover JFR data");
+            break;
+          }
+          bytes_read += (int64_t)read_result;
+          assert(bytes_read - bytes_written <= (int64_t)size_of_file_copy_block, "invariant");
+          bytes_written += (int64_t)os::write(emergency_fd, file_copy_block, bytes_read - bytes_written);
           assert(bytes_read == bytes_written, "invariant");
         }
         os::close(current_fd);
@@ -468,6 +475,6 @@
   return _chunkwriter->open();
 }
 
-size_t JfrRepository::close_chunk(jlong metadata_offset) {
+size_t JfrRepository::close_chunk(int64_t metadata_offset) {
   return _chunkwriter->close(metadata_offset);
 }

--- a/src/hotspot/share/jfr/recorder/repository/jfrRepository.hpp	Fri Feb 22 19:58:22 2019 +0530
+++ b/src/hotspot/share/jfr/recorder/repository/jfrRepository.hpp	Fri Feb 22 17:30:07 2019 +0300
@@ -55,7 +55,7 @@
   bool set_path(const char* path);
   void set_chunk_path(const char* path);
   bool open_chunk(bool vm_error = false);
-  size_t close_chunk(jlong metadata_offset);
+  size_t close_chunk(int64_t metadata_offset);
   void on_vm_error();
   static void notify_on_new_chunk_path();
   static JfrChunkWriter& chunkwriter();

--- a/src/hotspot/share/jfr/recorder/service/jfrRecorderService.cpp	Fri Feb 22 19:58:22 2019 +0530
+++ b/src/hotspot/share/jfr/recorder/service/jfrRecorderService.cpp	Fri Feb 22 17:30:07 2019 +0300
@@ -130,18 +130,18 @@
   bool not_acquired() const { return !_acquired; }
 };
 
-static intptr_t write_checkpoint_event_prologue(JfrChunkWriter& cw, u8 type_id) {
-  const intptr_t prev_cp_offset = cw.previous_checkpoint_offset();
-  const intptr_t prev_cp_relative_offset = 0 == prev_cp_offset ? 0 : prev_cp_offset - cw.current_offset();
+static int64_t write_checkpoint_event_prologue(JfrChunkWriter& cw, u8 type_id) {
+  const int64_t prev_cp_offset = cw.previous_checkpoint_offset();
+  const int64_t prev_cp_relative_offset = 0 == prev_cp_offset ? 0 : prev_cp_offset - cw.current_offset();
   cw.reserve(sizeof(u4));
   cw.write<u8>(EVENT_CHECKPOINT);
   cw.write(JfrTicks::now());
-  cw.write<jlong>((jlong)0);
+  cw.write((int64_t)0);
   cw.write(prev_cp_relative_offset); // write previous checkpoint offset delta
   cw.write<bool>(false); // flushpoint
-  cw.write<u4>((u4)1); // nof types in this checkpoint
-  cw.write<u8>(type_id);
-  const intptr_t number_of_elements_offset = cw.current_offset();
+  cw.write((u4)1); // nof types in this checkpoint
+  cw.write(type_id);
+  const int64_t number_of_elements_offset = cw.current_offset();
   cw.reserve(sizeof(u4));
   return number_of_elements_offset;
 }
@@ -161,8 +161,8 @@
   }
   bool process() {
     // current_cp_offset is also offset for the event size header field
-    const intptr_t current_cp_offset = _cw.current_offset();
-    const intptr_t num_elements_offset = write_checkpoint_event_prologue(_cw, _type_id);
+    const int64_t current_cp_offset = _cw.current_offset();
+    const int64_t num_elements_offset = write_checkpoint_event_prologue(_cw, _type_id);
     // invocation
     _content_functor.process();
     const u4 number_of_elements = (u4)_content_functor.processed();
@@ -468,9 +468,9 @@
   JfrMetadataEvent::lock();
 }
 
-static jlong write_metadata_event(JfrChunkWriter& chunkwriter) {
+static int64_t write_metadata_event(JfrChunkWriter& chunkwriter) {
   assert(chunkwriter.is_valid(), "invariant");
-  const jlong metadata_offset = chunkwriter.current_offset();
+  const int64_t metadata_offset = chunkwriter.current_offset();
   JfrMetadataEvent::write(chunkwriter, metadata_offset);
   return metadata_offset;
 }

--- a/src/hotspot/share/jfr/writers/jfrEventWriterHost.inline.hpp	Fri Feb 22 19:58:22 2019 +0530
+++ b/src/hotspot/share/jfr/writers/jfrEventWriterHost.inline.hpp	Fri Feb 22 17:30:07 2019 +0300
@@ -49,7 +49,7 @@
 inline intptr_t EventWriterHost<BE, IE, WriterPolicyImpl>::end_write(void) {
   assert(this->is_acquired(),
     "state corruption, calling end with writer with non-acquired state!");
-  return this->is_valid() ? this->used_offset() : 0;
+  return this->is_valid() ? (intptr_t)this->used_offset() : 0;
 }
 
 template <typename BE, typename IE, typename WriterPolicyImpl>

--- a/src/hotspot/share/jfr/writers/jfrPosition.hpp	Fri Feb 22 19:58:22 2019 +0530
+++ b/src/hotspot/share/jfr/writers/jfrPosition.hpp	Fri Feb 22 17:30:07 2019 +0300
@@ -48,8 +48,8 @@
 
  public:
   size_t available_size() const;
-  intptr_t used_offset() const;
-  intptr_t current_offset() const;
+  int64_t used_offset() const;
+  int64_t current_offset() const;
   size_t used_size() const;
   void reset();
 };

--- a/src/hotspot/share/jfr/writers/jfrPosition.inline.hpp	Fri Feb 22 19:58:22 2019 +0530
+++ b/src/hotspot/share/jfr/writers/jfrPosition.inline.hpp	Fri Feb 22 17:30:07 2019 +0300
@@ -80,12 +80,12 @@
 }
 
 template <typename AP>
-inline intptr_t Position<AP>::used_offset() const {
+inline int64_t Position<AP>::used_offset() const {
   return _current_pos - _start_pos;
 }
 
 template <typename AP>
-inline intptr_t Position<AP>::current_offset() const {
+inline int64_t Position<AP>::current_offset() const {
   return this->used_offset();
 }
 

--- a/src/hotspot/share/jfr/writers/jfrStreamWriterHost.hpp	Fri Feb 22 19:58:22 2019 +0530
+++ b/src/hotspot/share/jfr/writers/jfrStreamWriterHost.hpp	Fri Feb 22 17:30:07 2019 +0300
@@ -33,9 +33,9 @@
  public:
   typedef typename Adapter::StorageType StorageType;
  private:
-  intptr_t _stream_pos;
+  int64_t _stream_pos;
   fio_fd _fd;
-  intptr_t current_stream_position() const;
+  int64_t current_stream_position() const;
 
  protected:
   StreamWriterHost(StorageType* storage, Thread* thread);
@@ -47,8 +47,8 @@
   bool has_valid_fd() const;
 
  public:
-  intptr_t current_offset() const;
-  void seek(intptr_t offset);
+  int64_t current_offset() const;
+  void seek(int64_t offset);
   void flush();
   void write_unbuffered(const void* src, size_t len);
   bool is_valid() const;

--- a/src/hotspot/share/jfr/writers/jfrStreamWriterHost.inline.hpp	Fri Feb 22 19:58:22 2019 +0530
+++ b/src/hotspot/share/jfr/writers/jfrStreamWriterHost.inline.hpp	Fri Feb 22 17:30:07 2019 +0300
@@ -44,7 +44,7 @@
 }
 
 template <typename Adapter, typename AP>
-inline intptr_t StreamWriterHost<Adapter, AP>::current_stream_position() const {
+inline int64_t StreamWriterHost<Adapter, AP>::current_stream_position() const {
   return this->used_offset() + _stream_pos;
 }
 
@@ -73,7 +73,7 @@
 inline void StreamWriterHost<Adapter, AP>::flush(size_t size) {
   assert(size > 0, "invariant");
   assert(this->is_valid(), "invariant");
-  _stream_pos += os::write(_fd, this->start_pos(), (int)size);
+  _stream_pos += os::write(_fd, this->start_pos(), (unsigned int)size);
   StorageHost<Adapter, AP>::reset();
   assert(0 == this->used_offset(), "invariant");
 }
@@ -84,12 +84,12 @@
 }
 
 template <typename Adapter, typename AP>
-inline intptr_t StreamWriterHost<Adapter, AP>::current_offset() const {
+inline int64_t StreamWriterHost<Adapter, AP>::current_offset() const {
   return current_stream_position();
 }
 
 template <typename Adapter, typename AP>
-void StreamWriterHost<Adapter, AP>::seek(intptr_t offset) {
+void StreamWriterHost<Adapter, AP>::seek(int64_t offset) {
   this->flush();
   assert(0 == this->used_offset(), "can only seek from beginning");
   _stream_pos = os::seek_to_file_offset(_fd, offset);
@@ -110,7 +110,7 @@
   this->flush();
   assert(0 == this->used_offset(), "can only seek from beginning");
   while (len > 0) {
-    const int n = MIN2<int>((int)len, INT_MAX);
+    const unsigned int n = MIN2((unsigned int)len, (unsigned int)INT_MAX);
     _stream_pos += os::write(_fd, buf, n);
     len -= n;
   }

--- a/src/hotspot/share/jfr/writers/jfrWriterHost.hpp	Fri Feb 22 19:58:22 2019 +0530
+++ b/src/hotspot/share/jfr/writers/jfrWriterHost.hpp	Fri Feb 22 17:30:07 2019 +0300
@@ -91,12 +91,12 @@
   void bytes(const void* buf, size_t len);
   void write_utf8_u2_len(const char* value);
   template <typename T>
-  void write_padded_at_offset(T value, intptr_t offset);
+  void write_padded_at_offset(T value, int64_t offset);
   template <typename T>
-  void write_at_offset(T value, intptr_t offset);
+  void write_at_offset(T value, int64_t offset);
   template <typename T>
-  void write_be_at_offset(T value, intptr_t offset);
-  intptr_t reserve(size_t size);
+  void write_be_at_offset(T value, int64_t offset);
+  int64_t reserve(size_t size);
 };
 
 #endif // SHARE_JFR_WRITERS_JFRWRITERHOST_HPP

--- a/src/hotspot/share/jfr/writers/jfrWriterHost.inline.hpp	Fri Feb 22 19:58:22 2019 +0530
+++ b/src/hotspot/share/jfr/writers/jfrWriterHost.inline.hpp	Fri Feb 22 17:30:07 2019 +0300
@@ -196,7 +196,7 @@
 
 template <typename BE, typename IE, typename WriterPolicyImpl>
 inline void WriterHost<BE, IE, WriterPolicyImpl>::write(double value) {
-  be_write(*(uintptr_t*)&(value));
+  be_write(*(u8*)&(value));
 }
 
 template <typename BE, typename IE, typename WriterPolicyImpl>
@@ -317,9 +317,9 @@
 }
 
 template <typename BE, typename IE, typename WriterPolicyImpl>
-inline intptr_t WriterHost<BE, IE, WriterPolicyImpl>::reserve(size_t size) {
+inline int64_t WriterHost<BE, IE, WriterPolicyImpl>::reserve(size_t size) {
   if (ensure_size(size) != NULL) {
-    intptr_t reserved_offset = this->current_offset();
+    const int64_t reserved_offset = this->current_offset();
     this->set_current_pos(size);
     return reserved_offset;
   }
@@ -329,9 +329,9 @@
 
 template <typename BE, typename IE, typename WriterPolicyImpl>
 template <typename T>
-inline void WriterHost<BE, IE, WriterPolicyImpl>::write_padded_at_offset(T value, intptr_t offset) {
+inline void WriterHost<BE, IE, WriterPolicyImpl>::write_padded_at_offset(T value, int64_t offset) {
   if (this->is_valid()) {
-    const intptr_t current = this->current_offset();
+    const int64_t current = this->current_offset();
     this->seek(offset);
     write_padded(value);
     this->seek(current); // restore
@@ -340,9 +340,9 @@
 
 template <typename BE, typename IE, typename WriterPolicyImpl>
 template <typename T>
-inline void WriterHost<BE, IE, WriterPolicyImpl>::write_at_offset(T value, intptr_t offset) {
+inline void WriterHost<BE, IE, WriterPolicyImpl>::write_at_offset(T value, int64_t offset) {
   if (this->is_valid()) {
-    const intptr_t current = this->current_offset();
+    const int64_t current = this->current_offset();
     this->seek(offset);
     write(value);
     this->seek(current); // restore
@@ -351,9 +351,9 @@
 
 template <typename BE, typename IE, typename WriterPolicyImpl>
 template <typename T>
-inline void WriterHost<BE, IE, WriterPolicyImpl>::write_be_at_offset(T value, intptr_t offset) {
+inline void WriterHost<BE, IE, WriterPolicyImpl>::write_be_at_offset(T value, int64_t offset) {
   if (this->is_valid()) {
-    const intptr_t current = this->current_offset();
+    const int64_t current = this->current_offset();
     this->seek(offset);
     be_write(value);
     this->seek(current); // restore