jdk8-mips64-public/hotspot: src/share/vm/jfr/recorder/repository/jfrRepository.cpp@db357034b763 (annotated)

src/share/vm/jfr/recorder/repository/jfrRepository.cpp@db357034b763 (annotated)

src/share/vm/jfr/recorder/repository/jfrRepository.cpp

Tue, 16 Jun 2020 11:03:04 +0800

author: bulasevich
date: Tue, 16 Jun 2020 11:03:04 +0800
changeset 9947: db357034b763
parent 9880: 3549c2f110d2
permissions: -rw-r--r--

8217647: JFR: recordings on 32-bit systems unreadable
Reviewed-by: egahlin
Contributed-by: boris.ulasevich@bell-sw.com, markus.gronlund@oracle.com

 /*
  * Copyright (c) 2011, 2019, 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 "jfr/jfr.hpp"
 #include "jfr/jni/jfrJavaSupport.hpp"
 #include "jfr/recorder/jfrRecorder.hpp"
 #include "jfr/recorder/repository/jfrChunkState.hpp"
 #include "jfr/recorder/repository/jfrChunkWriter.hpp"
 #include "jfr/recorder/repository/jfrRepository.hpp"
 #include "jfr/recorder/service/jfrPostBox.hpp"
 #include "memory/resourceArea.hpp"
 #include "runtime/mutex.hpp"
 #include "runtime/arguments.hpp"
 #include "runtime/os.hpp"
 #include "runtime/thread.inline.hpp"
 static JfrRepository* _instance = NULL;
 JfrRepository& JfrRepository::instance() {
   return *_instance;
 }
 static JfrChunkWriter* _chunkwriter = NULL;
 static bool initialize_chunkwriter() {
   assert(_chunkwriter == NULL, "invariant");
   _chunkwriter = new JfrChunkWriter();
   return _chunkwriter != NULL && _chunkwriter->initialize();
 }
 JfrChunkWriter& JfrRepository::chunkwriter() {
   return *_chunkwriter;
 }
 JfrRepository::JfrRepository(JfrPostBox& post_box) : _path(NULL), _post_box(post_box) {}
 bool JfrRepository::initialize() {
   return initialize_chunkwriter();
 }
 JfrRepository::~JfrRepository() {
   if (_path != NULL) {
     JfrCHeapObj::free(_path, strlen(_path) + 1);
     _path = NULL;
   }
   if (_chunkwriter != NULL) {
     delete _chunkwriter;
     _chunkwriter = NULL;
   }
 }
 JfrRepository* JfrRepository::create(JfrPostBox& post_box) {
   assert(_instance == NULL, "invariant");
   _instance = new JfrRepository(post_box);
   return _instance;
 }
 void JfrRepository::destroy() {
   assert(_instance != NULL, "invariant");
   delete _instance;
   _instance = NULL;
 }
 static const char vm_error_filename_fmt[] = "hs_err_pid%p.jfr";
 static const char vm_oom_filename_fmt[] = "hs_oom_pid%p.jfr";
 static const char vm_soe_filename_fmt[] = "hs_soe_pid%p.jfr";
 static const char chunk_file_jfr_ext[] = ".jfr";
 static const size_t iso8601_len = 19; // "YYYY-MM-DDTHH:MM:SS"
 static fio_fd open_exclusivly(const char* path) {
   return os::open(path, O_CREAT | O_WRONLY, S_IREAD | S_IWRITE);
 }
 static fio_fd open_existing(const char* path) {
   return os::open(path, O_RDWR, S_IREAD | S_IWRITE);
 }
 static int file_sort(const char** const file1, const char** file2) {
   assert(NULL != *file1 && NULL != *file2, "invariant");
   int cmp = strncmp(*file1, *file2, iso8601_len);
   if (0 == cmp) {
     const char* const dot1 = strchr(*file1, '.');
     assert(NULL != dot1, "invariant");
     const char* const dot2 = strchr(*file2, '.');
     assert(NULL != dot2, "invariant");
     ptrdiff_t file1_len = dot1 - *file1;
     ptrdiff_t file2_len = dot2 - *file2;
     if (file1_len < file2_len) {
       return -1;
     }
     if (file1_len > file2_len) {
       return 1;
     }
     assert(file1_len == file2_len, "invariant");
     cmp = strncmp(*file1, *file2, file1_len);
   }
   assert(cmp != 0, "invariant");
   return cmp;
 }
 static void iso8601_to_date_time(char* iso8601_str) {
   assert(iso8601_str != NULL, "invariant");
   assert(strlen(iso8601_str) == iso8601_len, "invariant");
   // "YYYY-MM-DDTHH:MM:SS"
   for (size_t i = 0; i < iso8601_len; ++i) {
     switch(iso8601_str[i]) {
       case 'T' :
       case '-' :
       case ':' :
         iso8601_str[i] = '_';
         break;
     }
   }
   // "YYYY_MM_DD_HH_MM_SS"
 }
 static void date_time(char* buffer, size_t buffer_len) {
   assert(buffer != NULL, "invariant");
   assert(buffer_len >= iso8601_len, "buffer too small");
   os::iso8601_time(buffer, buffer_len);
   assert(strlen(buffer) >= iso8601_len + 1, "invariant");
   // "YYYY-MM-DDTHH:MM:SS"
   buffer[iso8601_len] = '\0';
   iso8601_to_date_time(buffer);
 }
 static int64_t file_size(fio_fd fd) {
   assert(fd != invalid_fd, "invariant");
   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;
 }
 class RepositoryIterator : public StackObj {
  private:
   const char* const _repo;
   const size_t _repository_len;
   GrowableArray<const char*>* _files;
   const char* const fully_qualified(const char* entry) const;
   mutable int _iterator;
  public:
    RepositoryIterator(const char* repository, size_t repository_len);
    ~RepositoryIterator() {}
   debug_only(void print_repository_files() const;)
   const char* const filter(const char* entry) const;
   bool has_next() const;
   const char* const next() const;
 };
 const char* const RepositoryIterator::fully_qualified(const char* entry) const {
   assert(NULL != entry, "invariant");
   char* file_path_entry = NULL;
    // only use files that have content, not placeholders
   const char* const file_separator = os::file_separator();
   if (NULL != file_separator) {
     const size_t entry_len = strlen(entry);
     const size_t file_separator_length = strlen(file_separator);
     const size_t file_path_entry_length = _repository_len + file_separator_length + entry_len;
     file_path_entry = NEW_RESOURCE_ARRAY_RETURN_NULL(char, file_path_entry_length + 1);
     if (NULL == file_path_entry) {
       return NULL;
     }
     int position = 0;
     position += jio_snprintf(&file_path_entry[position], _repository_len + 1, "%s", _repo);
     position += jio_snprintf(&file_path_entry[position], file_separator_length + 1, "%s", os::file_separator());
     position += jio_snprintf(&file_path_entry[position], entry_len + 1, "%s", entry);
     file_path_entry[position] = '\0';
     assert((size_t)position == file_path_entry_length, "invariant");
     assert(strlen(file_path_entry) == (size_t)position, "invariant");
   }
   return file_path_entry;
 }
 const char* const RepositoryIterator::filter(const char* entry) const {
   if (entry == NULL) {
     return NULL;
   }
   const size_t entry_len = strlen(entry);
   if (entry_len <= 2) {
     // for "." and ".."
     return NULL;
   }
   char* entry_name = NEW_RESOURCE_ARRAY_RETURN_NULL(char, entry_len + 1);
   if (entry_name == NULL) {
     return NULL;
   }
   strncpy(entry_name, entry, entry_len + 1);
   const char* const fully_qualified_path_entry = fully_qualified(entry_name);
   if (NULL == fully_qualified_path_entry) {
     return NULL;
   }
   const fio_fd entry_fd = open_existing(fully_qualified_path_entry);
   if (invalid_fd == entry_fd) {
     return NULL;
   }
   const int64_t entry_size = file_size(entry_fd);
   os::close(entry_fd);
   if (0 == entry_size) {
     return NULL;
   }
   return entry_name;
 }
 RepositoryIterator::RepositoryIterator(const char* repository, size_t repository_len) :
   _repo(repository),
   _repository_len(repository_len),
   _files(NULL),
   _iterator(0) {
   if (NULL != _repo) {
     assert(strlen(_repo) == _repository_len, "invariant");
     _files = new GrowableArray<const char*>(10);
     DIR* dirp = os::opendir(_repo);
     if (dirp == NULL) {
       if (true) tty->print_cr("Unable to open repository %s", _repo);
       return;
     }
     struct dirent* dentry;
     while ((dentry = os::readdir(dirp)) != NULL) {
       const char* const entry_path = filter(dentry->d_name);
       if (NULL != entry_path) {
         _files->append(entry_path);
       }
     }
     os::closedir(dirp);
     if (_files->length() > 1) {
       _files->sort(file_sort);
     }
   }
 }
 #ifdef ASSERT
 void RepositoryIterator::print_repository_files() const {
   while (has_next()) {
     if (true) tty->print_cr( "%s", next());
   }
 }
 #endif
 bool RepositoryIterator::has_next() const {
   return (_files != NULL && _iterator < _files->length());
 }
 const char* const RepositoryIterator::next() const {
   return _iterator >= _files->length() ? NULL : fully_qualified(_files->at(_iterator++));
 }
 static void write_emergency_file(fio_fd emergency_fd, const RepositoryIterator& iterator) {
   assert(emergency_fd != invalid_fd, "invariant");
   const size_t size_of_file_copy_block = 1 * M; // 1 mb
   jbyte* const file_copy_block = NEW_RESOURCE_ARRAY_RETURN_NULL(jbyte, size_of_file_copy_block);
   if (file_copy_block == NULL) {
     return;
   }
  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 int64_t current_filesize = file_size(current_fd);
         assert(current_filesize > 0, "invariant");
         int64_t bytes_read = 0;
         int64_t bytes_written = 0;
         while (bytes_read < current_filesize) {
           const ssize_t read_result = os::read_at(current_fd, file_copy_block, size_of_file_copy_block, bytes_read);
           if (-1 == read_result) {
             if (LogJFR) tty->print_cr("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);
         bytes_written_total += bytes_written;
       }
     }
   }
 }
 static const char* create_emergency_dump_path() {
   assert(JfrStream_lock->owned_by_self(), "invariant");
   char* buffer = NEW_RESOURCE_ARRAY_RETURN_NULL(char, O_BUFLEN);
   if (NULL == buffer) {
     return NULL;
   }
   const char* const cwd = os::get_current_directory(buffer, O_BUFLEN);
   if (NULL == cwd) {
     return NULL;
   }
   size_t pos = strlen(cwd);
   const int fsep_len = jio_snprintf(&buffer[pos], O_BUFLEN - pos, "%s", os::file_separator());
   const char* filename_fmt = NULL;
   // fetch specific error cause
   switch (JfrJavaSupport::cause()) {
     case JfrJavaSupport::OUT_OF_MEMORY:
       filename_fmt = vm_oom_filename_fmt;
       break;
     case JfrJavaSupport::STACK_OVERFLOW:
       filename_fmt = vm_soe_filename_fmt;
       break;
     default:
       filename_fmt = vm_error_filename_fmt;
   }
   char* emergency_dump_path = NULL;
   pos += fsep_len;
   if (Arguments::copy_expand_pid(filename_fmt, strlen(filename_fmt), &buffer[pos], O_BUFLEN - pos)) {
     const size_t emergency_filename_length = strlen(buffer);
     emergency_dump_path = NEW_RESOURCE_ARRAY_RETURN_NULL(char, emergency_filename_length + 1);
     if (NULL == emergency_dump_path) {
       return NULL;
     }
     strncpy(emergency_dump_path, buffer, emergency_filename_length + 1);
   }
   return emergency_dump_path;
 }
 // Caller needs ResourceMark
 static const char* create_emergency_chunk_path(const char* repository_base, size_t repository_len) {
   assert(repository_base != NULL, "invariant");
   assert(JfrStream_lock->owned_by_self(), "invariant");
   // date time
   char date_time_buffer[32] = {0};
   date_time(date_time_buffer, sizeof(date_time_buffer));
   size_t date_time_len = strlen(date_time_buffer);
   size_t chunkname_max_len = repository_len               // repository_base
                              + 1                          // "/"
                              + date_time_len              // date_time
                              + strlen(chunk_file_jfr_ext) // .jfr
                              + 1;
   char* chunk_path = NEW_RESOURCE_ARRAY_RETURN_NULL(char, chunkname_max_len);
   if (chunk_path == NULL) {
     return NULL;
   }
   // append the individual substrings
   jio_snprintf(chunk_path, chunkname_max_len, "%s%s%s%s", repository_base, os::file_separator(), date_time_buffer, chunk_file_jfr_ext);
   return chunk_path;
 }
 static fio_fd emergency_dump_file() {
   assert(JfrStream_lock->owned_by_self(), "invariant");
   ResourceMark rm;
   const char* const emergency_dump_path = create_emergency_dump_path();
   if (emergency_dump_path == NULL) {
     return invalid_fd;
   }
   const fio_fd fd = open_exclusivly(emergency_dump_path);
   if (fd != invalid_fd) {
     if (LogJFR) tty->print_cr( // For user, should not be "jfr, system"
       "Attempting to recover JFR data, emergency jfr file: %s", emergency_dump_path);
   }
   return fd;
 }
 static const char* emergency_path(const char* repository, size_t repository_len) {
   return repository == NULL ? create_emergency_dump_path() : create_emergency_chunk_path(repository, repository_len);
 }
 void JfrRepository::on_vm_error() {
   assert(!JfrStream_lock->owned_by_self(), "invariant");
   const char* path = _path;
   if (path == NULL) {
     // completed already
     return;
   }
   ResourceMark rm;
   MutexLockerEx stream_lock(JfrStream_lock, Mutex::_no_safepoint_check_flag);
   const fio_fd emergency_fd = emergency_dump_file();
   if (emergency_fd != invalid_fd) {
     RepositoryIterator iterator(path, strlen(path));
     write_emergency_file(emergency_fd, iterator);
     os::close(emergency_fd);
   }
 }
 bool JfrRepository::set_path(const char* path) {
   assert(path != NULL, "trying to set the repository path with a NULL string!");
   if (_path != NULL) {
     // delete existing
     JfrCHeapObj::free(_path, strlen(_path) + 1);
   }
   const size_t path_len = strlen(path);
   _path = JfrCHeapObj::new_array<char>(path_len + 1);
   if (_path == NULL) {
     return false;
   }
   strncpy(_path, path, path_len + 1);
   return true;
 }
 void JfrRepository::set_chunk_path(const char* path) {
   assert(JfrStream_lock->owned_by_self(), "invariant");
   chunkwriter().set_chunk_path(path);
 }
 void JfrRepository::notify_on_new_chunk_path() {
   if (Jfr::is_recording()) {
     instance()._post_box.post(MSG_ROTATE);
   }
 }
 /**
 * Sets the file where data should be written.
 *
 * Recording  Previous  Current  Action
 * ==============================================
 *   true     null      null     Ignore, keep recording in-memory
 *   true     null      file1    Start disk recording
 *   true     file      null     Copy out metadata to disk and continue in-memory recording
 *   true     file1     file2    Copy out metadata and start with new File (file2)
 *   false     *        null     Ignore, but start recording to memory
 *   false     *        file     Ignore, but start recording to disk
 */
 void JfrRepository::set_chunk_path(jstring path, JavaThread* jt) {
   DEBUG_ONLY(JfrJavaSupport::check_java_thread_in_vm(jt));
   ResourceMark rm(jt);
   const char* const canonical_chunk_path = JfrJavaSupport::c_str(path, jt);
   {
     MutexLockerEx stream_lock(JfrStream_lock, Mutex::_no_safepoint_check_flag);
     if (NULL == canonical_chunk_path && !_chunkwriter->is_valid()) {
       // new output is NULL and current output is NULL
       return;
     }
     instance().set_chunk_path(canonical_chunk_path);
   }
   notify_on_new_chunk_path();
 }
 void JfrRepository::set_path(jstring location, JavaThread* jt) {
   DEBUG_ONLY(JfrJavaSupport::check_java_thread_in_vm(jt));
   ResourceMark rm(jt);
   const char* const path = JfrJavaSupport::c_str(location, jt);
   if (path != NULL) {
     instance().set_path(path);
   }
 }
 bool JfrRepository::open_chunk(bool vm_error /* false */) {
   assert(JfrStream_lock->owned_by_self(), "invariant");
   if (vm_error) {
     ResourceMark rm;
     const char* repository_path = _path;
     const size_t repository_path_len = repository_path != NULL ? strlen(repository_path) : 0;
     const char* const path = emergency_path(repository_path, repository_path_len);
     _chunkwriter->set_chunk_path(path);
   }
   return _chunkwriter->open();
 }
 size_t JfrRepository::close_chunk(int64_t metadata_offset) {
   return _chunkwriter->close(metadata_offset);
 }

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/jfr/recorder/repository/jfrRepository.cpp@db357034b763 (annotated)

src/share/vm/jfr/recorder/repository/jfrRepository.cpp