apetushkov@9858: /*
mikael@9880:  * Copyright (c) 2011, 2019, Oracle and/or its affiliates. All rights reserved.
apetushkov@9858:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
apetushkov@9858:  *
apetushkov@9858:  * This code is free software; you can redistribute it and/or modify it
apetushkov@9858:  * under the terms of the GNU General Public License version 2 only, as
apetushkov@9858:  * published by the Free Software Foundation.
apetushkov@9858:  *
apetushkov@9858:  * This code is distributed in the hope that it will be useful, but WITHOUT
apetushkov@9858:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
apetushkov@9858:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
apetushkov@9858:  * version 2 for more details (a copy is included in the LICENSE file that
apetushkov@9858:  * accompanied this code).
apetushkov@9858:  *
apetushkov@9858:  * You should have received a copy of the GNU General Public License version
apetushkov@9858:  * 2 along with this work; if not, write to the Free Software Foundation,
apetushkov@9858:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
apetushkov@9858:  *
apetushkov@9858:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
apetushkov@9858:  * or visit www.oracle.com if you need additional information or have any
apetushkov@9858:  * questions.
apetushkov@9858:  *
apetushkov@9858:  */
apetushkov@9858: 
apetushkov@9858: #include "precompiled.hpp"
apetushkov@9858: #include "jfr/jfr.hpp"
apetushkov@9858: #include "jfr/jni/jfrJavaSupport.hpp"
apetushkov@9858: #include "jfr/recorder/jfrRecorder.hpp"
apetushkov@9858: #include "jfr/recorder/repository/jfrChunkState.hpp"
apetushkov@9858: #include "jfr/recorder/repository/jfrChunkWriter.hpp"
apetushkov@9858: #include "jfr/recorder/repository/jfrRepository.hpp"
apetushkov@9858: #include "jfr/recorder/service/jfrPostBox.hpp"
apetushkov@9858: #include "memory/resourceArea.hpp"
apetushkov@9858: #include "runtime/mutex.hpp"
apetushkov@9858: #include "runtime/arguments.hpp"
apetushkov@9858: #include "runtime/os.hpp"
apetushkov@9858: #include "runtime/thread.inline.hpp"
apetushkov@9858: 
apetushkov@9858: static JfrRepository* _instance = NULL;
apetushkov@9858: 
apetushkov@9858: JfrRepository& JfrRepository::instance() {
apetushkov@9858:   return *_instance;
apetushkov@9858: }
apetushkov@9858: 
apetushkov@9858: static JfrChunkWriter* _chunkwriter = NULL;
apetushkov@9858: 
apetushkov@9858: static bool initialize_chunkwriter() {
apetushkov@9858:   assert(_chunkwriter == NULL, "invariant");
apetushkov@9858:   _chunkwriter = new JfrChunkWriter();
apetushkov@9858:   return _chunkwriter != NULL && _chunkwriter->initialize();
apetushkov@9858: }
apetushkov@9858: 
apetushkov@9858: JfrChunkWriter& JfrRepository::chunkwriter() {
apetushkov@9858:   return *_chunkwriter;
apetushkov@9858: }
apetushkov@9858: 
apetushkov@9858: JfrRepository::JfrRepository(JfrPostBox& post_box) : _path(NULL), _post_box(post_box) {}
apetushkov@9858: 
apetushkov@9858: bool JfrRepository::initialize() {
apetushkov@9858:   return initialize_chunkwriter();
apetushkov@9858: }
apetushkov@9858: 
apetushkov@9858: JfrRepository::~JfrRepository() {
apetushkov@9858:   if (_path != NULL) {
apetushkov@9858:     JfrCHeapObj::free(_path, strlen(_path) + 1);
apetushkov@9858:     _path = NULL;
apetushkov@9858:   }
apetushkov@9858: 
apetushkov@9858:   if (_chunkwriter != NULL) {
apetushkov@9858:     delete _chunkwriter;
apetushkov@9858:     _chunkwriter = NULL;
apetushkov@9858:   }
apetushkov@9858: }
apetushkov@9858: 
apetushkov@9858: JfrRepository* JfrRepository::create(JfrPostBox& post_box) {
apetushkov@9858:   assert(_instance == NULL, "invariant");
apetushkov@9858:   _instance = new JfrRepository(post_box);
apetushkov@9858:   return _instance;
apetushkov@9858: }
apetushkov@9858: 
apetushkov@9858: void JfrRepository::destroy() {
apetushkov@9858:   assert(_instance != NULL, "invariant");
apetushkov@9858:   delete _instance;
apetushkov@9858:   _instance = NULL;
apetushkov@9858: }
apetushkov@9858: 
apetushkov@9858: static const char vm_error_filename_fmt[] = "hs_err_pid%p.jfr";
apetushkov@9858: static const char vm_oom_filename_fmt[] = "hs_oom_pid%p.jfr";
apetushkov@9858: static const char vm_soe_filename_fmt[] = "hs_soe_pid%p.jfr";
apetushkov@9858: static const char chunk_file_jfr_ext[] = ".jfr";
apetushkov@9858: static const size_t iso8601_len = 19; // "YYYY-MM-DDTHH:MM:SS"
apetushkov@9858: 
apetushkov@9858: static fio_fd open_exclusivly(const char* path) {
apetushkov@9858:   return os::open(path, O_CREAT | O_WRONLY, S_IREAD | S_IWRITE);
apetushkov@9858: }
apetushkov@9858: 
apetushkov@9858: static fio_fd open_existing(const char* path) {
apetushkov@9858:   return os::open(path, O_RDWR, S_IREAD | S_IWRITE);
apetushkov@9858: }
apetushkov@9858: 
apetushkov@9858: static int file_sort(const char** const file1, const char** file2) {
apetushkov@9858:   assert(NULL != *file1 && NULL != *file2, "invariant");
apetushkov@9858:   int cmp = strncmp(*file1, *file2, iso8601_len);
apetushkov@9858:   if (0 == cmp) {
apetushkov@9858:     const char* const dot1 = strchr(*file1, '.');
apetushkov@9858:     assert(NULL != dot1, "invariant");
apetushkov@9858:     const char* const dot2 = strchr(*file2, '.');
apetushkov@9858:     assert(NULL != dot2, "invariant");
apetushkov@9858:     ptrdiff_t file1_len = dot1 - *file1;
apetushkov@9858:     ptrdiff_t file2_len = dot2 - *file2;
apetushkov@9858:     if (file1_len < file2_len) {
apetushkov@9858:       return -1;
apetushkov@9858:     }
apetushkov@9858:     if (file1_len > file2_len) {
apetushkov@9858:       return 1;
apetushkov@9858:     }
apetushkov@9858:     assert(file1_len == file2_len, "invariant");
apetushkov@9858:     cmp = strncmp(*file1, *file2, file1_len);
apetushkov@9858:   }
apetushkov@9858:   assert(cmp != 0, "invariant");
apetushkov@9858:   return cmp;
apetushkov@9858: }
apetushkov@9858: 
apetushkov@9858: static void iso8601_to_date_time(char* iso8601_str) {
apetushkov@9858:   assert(iso8601_str != NULL, "invariant");
apetushkov@9858:   assert(strlen(iso8601_str) == iso8601_len, "invariant");
apetushkov@9858:   // "YYYY-MM-DDTHH:MM:SS"
apetushkov@9858:   for (size_t i = 0; i < iso8601_len; ++i) {
apetushkov@9858:     switch(iso8601_str[i]) {
apetushkov@9858:       case 'T' :
apetushkov@9858:       case '-' :
apetushkov@9858:       case ':' :
apetushkov@9858:         iso8601_str[i] = '_';
apetushkov@9858:         break;
apetushkov@9858:     }
apetushkov@9858:   }
apetushkov@9858:   // "YYYY_MM_DD_HH_MM_SS"
apetushkov@9858: }
apetushkov@9858: 
apetushkov@9858: static void date_time(char* buffer, size_t buffer_len) {
apetushkov@9858:   assert(buffer != NULL, "invariant");
apetushkov@9858:   assert(buffer_len >= iso8601_len, "buffer too small");
apetushkov@9858:   os::iso8601_time(buffer, buffer_len);
apetushkov@9858:   assert(strlen(buffer) >= iso8601_len + 1, "invariant");
apetushkov@9858:   // "YYYY-MM-DDTHH:MM:SS"
apetushkov@9858:   buffer[iso8601_len] = '\0';
apetushkov@9858:   iso8601_to_date_time(buffer);
apetushkov@9858: }
apetushkov@9858: 
bulasevich@9947: static int64_t file_size(fio_fd fd) {
apetushkov@9858:   assert(fd != invalid_fd, "invariant");
bulasevich@9947:   const int64_t current_offset = os::current_file_offset(fd);
bulasevich@9947:   const int64_t size = os::lseek(fd, 0, SEEK_END);
apetushkov@9858:   os::seek_to_file_offset(fd, current_offset);
apetushkov@9858:   return size;
apetushkov@9858: }
apetushkov@9858: 
apetushkov@9858: class RepositoryIterator : public StackObj {
apetushkov@9858:  private:
apetushkov@9858:   const char* const _repo;
apetushkov@9858:   const size_t _repository_len;
apetushkov@9858:   GrowableArray<const char*>* _files;
apetushkov@9858:   const char* const fully_qualified(const char* entry) const;
apetushkov@9858:   mutable int _iterator;
apetushkov@9858: 
apetushkov@9858:  public:
apetushkov@9858:    RepositoryIterator(const char* repository, size_t repository_len);
apetushkov@9858:    ~RepositoryIterator() {}
apetushkov@9858:   debug_only(void print_repository_files() const;)
apetushkov@9858:   const char* const filter(const char* entry) const;
apetushkov@9858:   bool has_next() const;
apetushkov@9858:   const char* const next() const;
apetushkov@9858: };
apetushkov@9858: 
apetushkov@9858: const char* const RepositoryIterator::fully_qualified(const char* entry) const {
apetushkov@9858:   assert(NULL != entry, "invariant");
apetushkov@9858:   char* file_path_entry = NULL;
apetushkov@9858:    // only use files that have content, not placeholders
apetushkov@9858:   const char* const file_separator = os::file_separator();
apetushkov@9858:   if (NULL != file_separator) {
apetushkov@9858:     const size_t entry_len = strlen(entry);
apetushkov@9858:     const size_t file_separator_length = strlen(file_separator);
apetushkov@9858:     const size_t file_path_entry_length = _repository_len + file_separator_length + entry_len;
apetushkov@9858:     file_path_entry = NEW_RESOURCE_ARRAY_RETURN_NULL(char, file_path_entry_length + 1);
apetushkov@9858:     if (NULL == file_path_entry) {
apetushkov@9858:       return NULL;
apetushkov@9858:     }
apetushkov@9858:     int position = 0;
apetushkov@9858:     position += jio_snprintf(&file_path_entry[position], _repository_len + 1, "%s", _repo);
apetushkov@9858:     position += jio_snprintf(&file_path_entry[position], file_separator_length + 1, "%s", os::file_separator());
apetushkov@9858:     position += jio_snprintf(&file_path_entry[position], entry_len + 1, "%s", entry);
apetushkov@9858:     file_path_entry[position] = '\0';
apetushkov@9858:     assert((size_t)position == file_path_entry_length, "invariant");
apetushkov@9858:     assert(strlen(file_path_entry) == (size_t)position, "invariant");
apetushkov@9858:   }
apetushkov@9858:   return file_path_entry;
apetushkov@9858: }
apetushkov@9858: 
apetushkov@9858: const char* const RepositoryIterator::filter(const char* entry) const {
apetushkov@9858:   if (entry == NULL) {
apetushkov@9858:     return NULL;
apetushkov@9858:   }
apetushkov@9858:   const size_t entry_len = strlen(entry);
apetushkov@9858:   if (entry_len <= 2) {
apetushkov@9858:     // for "." and ".."
apetushkov@9858:     return NULL;
apetushkov@9858:   }
apetushkov@9858:   char* entry_name = NEW_RESOURCE_ARRAY_RETURN_NULL(char, entry_len + 1);
apetushkov@9858:   if (entry_name == NULL) {
apetushkov@9858:     return NULL;
apetushkov@9858:   }
mikael@9880:   strncpy(entry_name, entry, entry_len + 1);
apetushkov@9858:   const char* const fully_qualified_path_entry = fully_qualified(entry_name);
apetushkov@9858:   if (NULL == fully_qualified_path_entry) {
apetushkov@9858:     return NULL;
apetushkov@9858:   }
apetushkov@9858:   const fio_fd entry_fd = open_existing(fully_qualified_path_entry);
apetushkov@9858:   if (invalid_fd == entry_fd) {
apetushkov@9858:     return NULL;
apetushkov@9858:   }
bulasevich@9947:   const int64_t entry_size = file_size(entry_fd);
apetushkov@9858:   os::close(entry_fd);
apetushkov@9858:   if (0 == entry_size) {
apetushkov@9858:     return NULL;
apetushkov@9858:   }
apetushkov@9858:   return entry_name;
apetushkov@9858: }
apetushkov@9858: 
apetushkov@9858: RepositoryIterator::RepositoryIterator(const char* repository, size_t repository_len) :
apetushkov@9858:   _repo(repository),
apetushkov@9858:   _repository_len(repository_len),
apetushkov@9858:   _files(NULL),
apetushkov@9858:   _iterator(0) {
apetushkov@9858:   if (NULL != _repo) {
apetushkov@9858:     assert(strlen(_repo) == _repository_len, "invariant");
apetushkov@9858:     _files = new GrowableArray<const char*>(10);
apetushkov@9858:     DIR* dirp = os::opendir(_repo);
apetushkov@9858:     if (dirp == NULL) {
apetushkov@9858:       if (true) tty->print_cr("Unable to open repository %s", _repo);
apetushkov@9858:       return;
apetushkov@9858:     }
apetushkov@9858:     struct dirent* dentry;
apetushkov@9858:     while ((dentry = os::readdir(dirp)) != NULL) {
apetushkov@9858:       const char* const entry_path = filter(dentry->d_name);
apetushkov@9858:       if (NULL != entry_path) {
apetushkov@9858:         _files->append(entry_path);
apetushkov@9858:       }
apetushkov@9858:     }
apetushkov@9858:     os::closedir(dirp);
apetushkov@9858:     if (_files->length() > 1) {
apetushkov@9858:       _files->sort(file_sort);
apetushkov@9858:     }
apetushkov@9858:   }
apetushkov@9858: }
apetushkov@9858: 
apetushkov@9858: #ifdef ASSERT
apetushkov@9858: void RepositoryIterator::print_repository_files() const {
apetushkov@9858:   while (has_next()) {
apetushkov@9858:     if (true) tty->print_cr( "%s", next());
apetushkov@9858:   }
apetushkov@9858: }
apetushkov@9858: #endif
bulasevich@9947: 
apetushkov@9858: bool RepositoryIterator::has_next() const {
apetushkov@9858:   return (_files != NULL && _iterator < _files->length());
apetushkov@9858: }
apetushkov@9858: 
apetushkov@9858: const char* const RepositoryIterator::next() const {
apetushkov@9858:   return _iterator >= _files->length() ? NULL : fully_qualified(_files->at(_iterator++));
apetushkov@9858: }
apetushkov@9858: 
apetushkov@9858: static void write_emergency_file(fio_fd emergency_fd, const RepositoryIterator& iterator) {
apetushkov@9858:   assert(emergency_fd != invalid_fd, "invariant");
apetushkov@9858:   const size_t size_of_file_copy_block = 1 * M; // 1 mb
apetushkov@9858:   jbyte* const file_copy_block = NEW_RESOURCE_ARRAY_RETURN_NULL(jbyte, size_of_file_copy_block);
apetushkov@9858:   if (file_copy_block == NULL) {
apetushkov@9858:     return;
apetushkov@9858:   }
bulasevich@9947:  int64_t bytes_written_total = 0;
apetushkov@9858:   while (iterator.has_next()) {
apetushkov@9858:     fio_fd current_fd = invalid_fd;
apetushkov@9858:     const char* const fqn = iterator.next();
apetushkov@9858:     if (fqn != NULL) {
apetushkov@9858:       current_fd = open_existing(fqn);
apetushkov@9858:       if (current_fd != invalid_fd) {
bulasevich@9947:         const int64_t current_filesize = file_size(current_fd);
apetushkov@9858:         assert(current_filesize > 0, "invariant");
bulasevich@9947:         int64_t bytes_read = 0;
bulasevich@9947:         int64_t bytes_written = 0;
apetushkov@9858:         while (bytes_read < current_filesize) {
bulasevich@9947:           const ssize_t read_result = os::read_at(current_fd, file_copy_block, size_of_file_copy_block, bytes_read);
bulasevich@9947:           if (-1 == read_result) {
bulasevich@9947:             if (LogJFR) tty->print_cr("Unable to recover JFR data");
bulasevich@9947:             break;
bulasevich@9947:           }
bulasevich@9947:           bytes_read += (int64_t)read_result;
bulasevich@9947:           assert(bytes_read - bytes_written <= (int64_t)size_of_file_copy_block, "invariant");
bulasevich@9947:           bytes_written += (int64_t)os::write(emergency_fd, file_copy_block, bytes_read - bytes_written);
apetushkov@9858:           assert(bytes_read == bytes_written, "invariant");
apetushkov@9858:         }
apetushkov@9858:         os::close(current_fd);
apetushkov@9858:         bytes_written_total += bytes_written;
apetushkov@9858:       }
apetushkov@9858:     }
apetushkov@9858:   }
apetushkov@9858: }
apetushkov@9858: 
apetushkov@9858: static const char* create_emergency_dump_path() {
apetushkov@9858:   assert(JfrStream_lock->owned_by_self(), "invariant");
apetushkov@9858:   char* buffer = NEW_RESOURCE_ARRAY_RETURN_NULL(char, O_BUFLEN);
apetushkov@9858:   if (NULL == buffer) {
apetushkov@9858:     return NULL;
apetushkov@9858:   }
apetushkov@9858:   const char* const cwd = os::get_current_directory(buffer, O_BUFLEN);
apetushkov@9858:   if (NULL == cwd) {
apetushkov@9858:     return NULL;
apetushkov@9858:   }
apetushkov@9858:   size_t pos = strlen(cwd);
apetushkov@9858:   const int fsep_len = jio_snprintf(&buffer[pos], O_BUFLEN - pos, "%s", os::file_separator());
apetushkov@9858:   const char* filename_fmt = NULL;
apetushkov@9858:   // fetch specific error cause
apetushkov@9858:   switch (JfrJavaSupport::cause()) {
apetushkov@9858:     case JfrJavaSupport::OUT_OF_MEMORY:
apetushkov@9858:       filename_fmt = vm_oom_filename_fmt;
apetushkov@9858:       break;
apetushkov@9858:     case JfrJavaSupport::STACK_OVERFLOW:
apetushkov@9858:       filename_fmt = vm_soe_filename_fmt;
apetushkov@9858:       break;
apetushkov@9858:     default:
apetushkov@9858:       filename_fmt = vm_error_filename_fmt;
apetushkov@9858:   }
apetushkov@9858:   char* emergency_dump_path = NULL;
apetushkov@9858:   pos += fsep_len;
apetushkov@9858:   if (Arguments::copy_expand_pid(filename_fmt, strlen(filename_fmt), &buffer[pos], O_BUFLEN - pos)) {
apetushkov@9858:     const size_t emergency_filename_length = strlen(buffer);
apetushkov@9858:     emergency_dump_path = NEW_RESOURCE_ARRAY_RETURN_NULL(char, emergency_filename_length + 1);
apetushkov@9858:     if (NULL == emergency_dump_path) {
apetushkov@9858:       return NULL;
apetushkov@9858:     }
mikael@9880:     strncpy(emergency_dump_path, buffer, emergency_filename_length + 1);
apetushkov@9858:   }
apetushkov@9858:   return emergency_dump_path;
apetushkov@9858: }
apetushkov@9858: 
apetushkov@9858: // Caller needs ResourceMark
apetushkov@9858: static const char* create_emergency_chunk_path(const char* repository_base, size_t repository_len) {
apetushkov@9858:   assert(repository_base != NULL, "invariant");
apetushkov@9858:   assert(JfrStream_lock->owned_by_self(), "invariant");
apetushkov@9858:   // date time
apetushkov@9858:   char date_time_buffer[32] = {0};
apetushkov@9858:   date_time(date_time_buffer, sizeof(date_time_buffer));
apetushkov@9858:   size_t date_time_len = strlen(date_time_buffer);
apetushkov@9858:   size_t chunkname_max_len = repository_len               // repository_base
apetushkov@9858:                              + 1                          // "/"
apetushkov@9858:                              + date_time_len              // date_time
apetushkov@9858:                              + strlen(chunk_file_jfr_ext) // .jfr
apetushkov@9858:                              + 1;
apetushkov@9858:   char* chunk_path = NEW_RESOURCE_ARRAY_RETURN_NULL(char, chunkname_max_len);
apetushkov@9858:   if (chunk_path == NULL) {
apetushkov@9858:     return NULL;
apetushkov@9858:   }
apetushkov@9858:   // append the individual substrings
apetushkov@9858:   jio_snprintf(chunk_path, chunkname_max_len, "%s%s%s%s", repository_base, os::file_separator(), date_time_buffer, chunk_file_jfr_ext);
apetushkov@9858:   return chunk_path;
apetushkov@9858: }
apetushkov@9858: 
apetushkov@9858: static fio_fd emergency_dump_file() {
apetushkov@9858:   assert(JfrStream_lock->owned_by_self(), "invariant");
apetushkov@9858:   ResourceMark rm;
apetushkov@9858:   const char* const emergency_dump_path = create_emergency_dump_path();
apetushkov@9858:   if (emergency_dump_path == NULL) {
apetushkov@9858:     return invalid_fd;
apetushkov@9858:   }
apetushkov@9858:   const fio_fd fd = open_exclusivly(emergency_dump_path);
apetushkov@9858:   if (fd != invalid_fd) {
apetushkov@9858:     if (LogJFR) tty->print_cr( // For user, should not be "jfr, system"
apetushkov@9858:       "Attempting to recover JFR data, emergency jfr file: %s", emergency_dump_path);
apetushkov@9858:   }
apetushkov@9858:   return fd;
apetushkov@9858: }
apetushkov@9858: 
apetushkov@9858: static const char* emergency_path(const char* repository, size_t repository_len) {
apetushkov@9858:   return repository == NULL ? create_emergency_dump_path() : create_emergency_chunk_path(repository, repository_len);
apetushkov@9858: }
apetushkov@9858: 
apetushkov@9858: void JfrRepository::on_vm_error() {
apetushkov@9858:   assert(!JfrStream_lock->owned_by_self(), "invariant");
apetushkov@9858:   const char* path = _path;
apetushkov@9858:   if (path == NULL) {
apetushkov@9858:     // completed already
apetushkov@9858:     return;
apetushkov@9858:   }
apetushkov@9858:   ResourceMark rm;
apetushkov@9858:   MutexLockerEx stream_lock(JfrStream_lock, Mutex::_no_safepoint_check_flag);
apetushkov@9858:   const fio_fd emergency_fd = emergency_dump_file();
apetushkov@9858:   if (emergency_fd != invalid_fd) {
apetushkov@9858:     RepositoryIterator iterator(path, strlen(path));
apetushkov@9858:     write_emergency_file(emergency_fd, iterator);
apetushkov@9858:     os::close(emergency_fd);
apetushkov@9858:   }
apetushkov@9858: }
apetushkov@9858: 
apetushkov@9858: bool JfrRepository::set_path(const char* path) {
apetushkov@9858:   assert(path != NULL, "trying to set the repository path with a NULL string!");
apetushkov@9858:   if (_path != NULL) {
apetushkov@9858:     // delete existing
apetushkov@9858:     JfrCHeapObj::free(_path, strlen(_path) + 1);
apetushkov@9858:   }
apetushkov@9858:   const size_t path_len = strlen(path);
apetushkov@9858:   _path = JfrCHeapObj::new_array<char>(path_len + 1);
apetushkov@9858:   if (_path == NULL) {
apetushkov@9858:     return false;
apetushkov@9858:   }
mikael@9880:   strncpy(_path, path, path_len + 1);
apetushkov@9858:   return true;
apetushkov@9858: }
apetushkov@9858: 
apetushkov@9858: void JfrRepository::set_chunk_path(const char* path) {
apetushkov@9858:   assert(JfrStream_lock->owned_by_self(), "invariant");
apetushkov@9858:   chunkwriter().set_chunk_path(path);
apetushkov@9858: }
apetushkov@9858: 
apetushkov@9858: void JfrRepository::notify_on_new_chunk_path() {
apetushkov@9858:   if (Jfr::is_recording()) {
apetushkov@9858:     instance()._post_box.post(MSG_ROTATE);
apetushkov@9858:   }
apetushkov@9858: }
apetushkov@9858: 
apetushkov@9858: /**
apetushkov@9858: * Sets the file where data should be written.
apetushkov@9858: *
apetushkov@9858: * Recording  Previous  Current  Action
apetushkov@9858: * ==============================================
apetushkov@9858: *   true     null      null     Ignore, keep recording in-memory
apetushkov@9858: *   true     null      file1    Start disk recording
apetushkov@9858: *   true     file      null     Copy out metadata to disk and continue in-memory recording
apetushkov@9858: *   true     file1     file2    Copy out metadata and start with new File (file2)
apetushkov@9858: *   false     *        null     Ignore, but start recording to memory
apetushkov@9858: *   false     *        file     Ignore, but start recording to disk
apetushkov@9858: */
apetushkov@9858: void JfrRepository::set_chunk_path(jstring path, JavaThread* jt) {
apetushkov@9858:   DEBUG_ONLY(JfrJavaSupport::check_java_thread_in_vm(jt));
apetushkov@9858:   ResourceMark rm(jt);
apetushkov@9858:   const char* const canonical_chunk_path = JfrJavaSupport::c_str(path, jt);
apetushkov@9858:   {
apetushkov@9858:     MutexLockerEx stream_lock(JfrStream_lock, Mutex::_no_safepoint_check_flag);
apetushkov@9858:     if (NULL == canonical_chunk_path && !_chunkwriter->is_valid()) {
apetushkov@9858:       // new output is NULL and current output is NULL
apetushkov@9858:       return;
apetushkov@9858:     }
apetushkov@9858:     instance().set_chunk_path(canonical_chunk_path);
apetushkov@9858:   }
apetushkov@9858:   notify_on_new_chunk_path();
apetushkov@9858: }
apetushkov@9858: 
apetushkov@9858: void JfrRepository::set_path(jstring location, JavaThread* jt) {
apetushkov@9858:   DEBUG_ONLY(JfrJavaSupport::check_java_thread_in_vm(jt));
apetushkov@9858:   ResourceMark rm(jt);
apetushkov@9858:   const char* const path = JfrJavaSupport::c_str(location, jt);
apetushkov@9858:   if (path != NULL) {
apetushkov@9858:     instance().set_path(path);
apetushkov@9858:   }
apetushkov@9858: }
apetushkov@9858: 
apetushkov@9858: bool JfrRepository::open_chunk(bool vm_error /* false */) {
apetushkov@9858:   assert(JfrStream_lock->owned_by_self(), "invariant");
apetushkov@9858:   if (vm_error) {
apetushkov@9858:     ResourceMark rm;
apetushkov@9858:     const char* repository_path = _path;
apetushkov@9858:     const size_t repository_path_len = repository_path != NULL ? strlen(repository_path) : 0;
apetushkov@9858:     const char* const path = emergency_path(repository_path, repository_path_len);
apetushkov@9858:     _chunkwriter->set_chunk_path(path);
apetushkov@9858:   }
apetushkov@9858:   return _chunkwriter->open();
apetushkov@9858: }
apetushkov@9858: 
bulasevich@9947: size_t JfrRepository::close_chunk(int64_t metadata_offset) {
apetushkov@9858:   return _chunkwriter->close(metadata_offset);
apetushkov@9858: }