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/*
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* Copyright (c) 2011, 2018, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*
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*/
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#include "precompiled.hpp"
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#include "jfr/jfr.hpp"
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#include "jfr/jni/jfrJavaSupport.hpp"
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#include "jfr/recorder/jfrRecorder.hpp"
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#include "jfr/recorder/repository/jfrChunkState.hpp"
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#include "jfr/recorder/repository/jfrChunkWriter.hpp"
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#include "jfr/recorder/repository/jfrRepository.hpp"
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#include "jfr/recorder/service/jfrPostBox.hpp"
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#include "logging/log.hpp"
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#include "memory/resourceArea.hpp"
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#include "runtime/mutex.hpp"
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#include "runtime/os.hpp"
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#include "runtime/thread.inline.hpp"
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static JfrRepository* _instance = NULL;
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JfrRepository& JfrRepository::instance() {
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return *_instance;
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}
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static JfrChunkWriter* _chunkwriter = NULL;
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static bool initialize_chunkwriter() {
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assert(_chunkwriter == NULL, "invariant");
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_chunkwriter = new JfrChunkWriter();
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return _chunkwriter != NULL && _chunkwriter->initialize();
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}
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JfrChunkWriter& JfrRepository::chunkwriter() {
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return *_chunkwriter;
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}
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JfrRepository::JfrRepository(JfrPostBox& post_box) : _path(NULL), _post_box(post_box) {}
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bool JfrRepository::initialize() {
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return initialize_chunkwriter();
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}
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JfrRepository::~JfrRepository() {
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if (_path != NULL) {
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JfrCHeapObj::free(_path, strlen(_path) + 1);
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_path = NULL;
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}
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if (_chunkwriter != NULL) {
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delete _chunkwriter;
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_chunkwriter = NULL;
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}
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}
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JfrRepository* JfrRepository::create(JfrPostBox& post_box) {
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assert(_instance == NULL, "invariant");
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_instance = new JfrRepository(post_box);
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return _instance;
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}
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void JfrRepository::destroy() {
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assert(_instance != NULL, "invariant");
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delete _instance;
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_instance = NULL;
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}
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static const char vm_error_filename_fmt[] = "hs_err_pid%p.jfr";
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static const char vm_oom_filename_fmt[] = "hs_oom_pid%p.jfr";
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static const char vm_soe_filename_fmt[] = "hs_soe_pid%p.jfr";
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static const char chunk_file_jfr_ext[] = ".jfr";
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static const size_t iso8601_len = 19; // "YYYY-MM-DDTHH:MM:SS"
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static fio_fd open_exclusivly(const char* path) {
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return os::open(path, O_CREAT | O_WRONLY, S_IREAD | S_IWRITE);
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}
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static fio_fd open_existing(const char* path) {
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return os::open(path, O_RDWR, S_IREAD | S_IWRITE);
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}
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static int file_sort(const char** const file1, const char** file2) {
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assert(NULL != *file1 && NULL != *file2, "invariant");
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int cmp = strncmp(*file1, *file2, iso8601_len);
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if (0 == cmp) {
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const char* const dot1 = strchr(*file1, '.');
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assert(NULL != dot1, "invariant");
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const char* const dot2 = strchr(*file2, '.');
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assert(NULL != dot2, "invariant");
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ptrdiff_t file1_len = dot1 - *file1;
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ptrdiff_t file2_len = dot2 - *file2;
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if (file1_len < file2_len) {
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return -1;
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}
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if (file1_len > file2_len) {
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return 1;
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}
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assert(file1_len == file2_len, "invariant");
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cmp = strncmp(*file1, *file2, file1_len);
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}
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assert(cmp != 0, "invariant");
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return cmp;
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}
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static void iso8601_to_date_time(char* iso8601_str) {
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assert(iso8601_str != NULL, "invariant");
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assert(strlen(iso8601_str) == iso8601_len, "invariant");
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// "YYYY-MM-DDTHH:MM:SS"
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for (size_t i = 0; i < iso8601_len; ++i) {
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switch(iso8601_str[i]) {
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case 'T' :
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case '-' :
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case ':' :
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iso8601_str[i] = '_';
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break;
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}
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}
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// "YYYY_MM_DD_HH_MM_SS"
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}
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static void date_time(char* buffer, size_t buffer_len) {
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assert(buffer != NULL, "invariant");
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assert(buffer_len >= iso8601_len, "buffer too small");
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os::iso8601_time(buffer, buffer_len);
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assert(strlen(buffer) >= iso8601_len + 1, "invariant");
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// "YYYY-MM-DDTHH:MM:SS"
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buffer[iso8601_len] = '\0';
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iso8601_to_date_time(buffer);
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}
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static jlong file_size(fio_fd fd) {
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assert(fd != invalid_fd, "invariant");
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const jlong current_offset = os::current_file_offset(fd);
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const jlong size = os::lseek(fd, 0, SEEK_END);
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os::seek_to_file_offset(fd, current_offset);
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return size;
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}
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class RepositoryIterator : public StackObj {
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private:
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const char* const _repo;
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const size_t _repository_len;
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GrowableArray<const char*>* _files;
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const char* const fully_qualified(const char* entry) const;
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mutable int _iterator;
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public:
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RepositoryIterator(const char* repository, size_t repository_len);
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~RepositoryIterator() {}
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debug_only(void print_repository_files() const;)
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const char* const filter(const char* entry) const;
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bool has_next() const;
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const char* const next() const;
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};
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const char* const RepositoryIterator::fully_qualified(const char* entry) const {
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assert(NULL != entry, "invariant");
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char* file_path_entry = NULL;
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// only use files that have content, not placeholders
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const char* const file_separator = os::file_separator();
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if (NULL != file_separator) {
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const size_t entry_len = strlen(entry);
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const size_t file_separator_length = strlen(file_separator);
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const size_t file_path_entry_length = _repository_len + file_separator_length + entry_len;
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file_path_entry = NEW_RESOURCE_ARRAY_RETURN_NULL(char, file_path_entry_length + 1);
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if (NULL == file_path_entry) {
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return NULL;
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}
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int position = 0;
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position += jio_snprintf(&file_path_entry[position], _repository_len + 1, "%s", _repo);
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position += jio_snprintf(&file_path_entry[position], file_separator_length + 1, "%s", os::file_separator());
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position += jio_snprintf(&file_path_entry[position], entry_len + 1, "%s", entry);
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file_path_entry[position] = '\0';
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assert((size_t)position == file_path_entry_length, "invariant");
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assert(strlen(file_path_entry) == (size_t)position, "invariant");
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}
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return file_path_entry;
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}
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const char* const RepositoryIterator::filter(const char* entry) const {
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if (entry == NULL) {
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return NULL;
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}
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const size_t entry_len = strlen(entry);
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if (entry_len <= 2) {
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// for "." and ".."
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return NULL;
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}
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char* entry_name = NEW_RESOURCE_ARRAY_RETURN_NULL(char, entry_len + 1);
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if (entry_name == NULL) {
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return NULL;
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}
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strncpy(entry_name, entry, entry_len);
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entry_name[entry_len] = '\0';
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const char* const fully_qualified_path_entry = fully_qualified(entry_name);
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if (NULL == fully_qualified_path_entry) {
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return NULL;
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}
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const fio_fd entry_fd = open_existing(fully_qualified_path_entry);
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if (invalid_fd == entry_fd) {
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return NULL;
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}
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const jlong entry_size = file_size(entry_fd);
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os::close(entry_fd);
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if (0 == entry_size) {
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return NULL;
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}
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return entry_name;
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}
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RepositoryIterator::RepositoryIterator(const char* repository, size_t repository_len) :
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_repo(repository),
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_repository_len(repository_len),
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_files(NULL),
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_iterator(0) {
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if (NULL != _repo) {
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assert(strlen(_repo) == _repository_len, "invariant");
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_files = new GrowableArray<const char*>(10);
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DIR* dirp = os::opendir(_repo);
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if (dirp == NULL) {
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log_error(jfr, system)("Unable to open repository %s", _repo);
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return;
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}
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struct dirent* dentry;
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char* dir_buffer = NEW_RESOURCE_ARRAY_RETURN_NULL(char, os::readdir_buf_size(_repo));
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if (dir_buffer == NULL) {
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return;
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}
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while ((dentry = os::readdir(dirp, (struct dirent*)dir_buffer)) != NULL) {
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const char* const entry_path = filter(dentry->d_name);
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if (NULL != entry_path) {
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_files->append(entry_path);
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}
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}
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os::closedir(dirp);
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if (_files->length() > 1) {
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_files->sort(file_sort);
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}
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}
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}
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#ifdef ASSERT
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void RepositoryIterator::print_repository_files() const {
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while (has_next()) {
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log_error(jfr, system)( "%s", next());
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}
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}
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#endif
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bool RepositoryIterator::has_next() const {
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return (_files != NULL && _iterator < _files->length());
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}
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const char* const RepositoryIterator::next() const {
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return _iterator >= _files->length() ? NULL : fully_qualified(_files->at(_iterator++));
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}
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static void write_emergency_file(fio_fd emergency_fd, const RepositoryIterator& iterator) {
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assert(emergency_fd != invalid_fd, "invariant");
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const size_t size_of_file_copy_block = 1 * M; // 1 mb
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jbyte* const file_copy_block = NEW_RESOURCE_ARRAY_RETURN_NULL(jbyte, size_of_file_copy_block);
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if (file_copy_block == NULL) {
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return;
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}
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jlong bytes_written_total = 0;
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while (iterator.has_next()) {
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fio_fd current_fd = invalid_fd;
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const char* const fqn = iterator.next();
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if (fqn != NULL) {
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current_fd = open_existing(fqn);
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if (current_fd != invalid_fd) {
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const jlong current_filesize = file_size(current_fd);
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assert(current_filesize > 0, "invariant");
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jlong bytes_read = 0;
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jlong bytes_written = 0;
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while (bytes_read < current_filesize) {
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bytes_read += (jlong)os::read_at(current_fd, file_copy_block, size_of_file_copy_block, bytes_read);
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assert(bytes_read - bytes_written <= (jlong)size_of_file_copy_block, "invariant");
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bytes_written += (jlong)os::write(emergency_fd, file_copy_block, bytes_read - bytes_written);
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assert(bytes_read == bytes_written, "invariant");
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}
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os::close(current_fd);
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bytes_written_total += bytes_written;
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}
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}
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}
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}
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static const char* create_emergency_dump_path() {
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assert(JfrStream_lock->owned_by_self(), "invariant");
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char* buffer = NEW_RESOURCE_ARRAY_RETURN_NULL(char, O_BUFLEN);
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if (NULL == buffer) {
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return NULL;
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}
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const char* const cwd = os::get_current_directory(buffer, O_BUFLEN);
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if (NULL == cwd) {
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return NULL;
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}
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size_t pos = strlen(cwd);
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const int fsep_len = jio_snprintf(&buffer[pos], O_BUFLEN - pos, "%s", os::file_separator());
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const char* filename_fmt = NULL;
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// fetch specific error cause
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switch (JfrJavaSupport::cause()) {
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case JfrJavaSupport::OUT_OF_MEMORY:
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filename_fmt = vm_oom_filename_fmt;
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break;
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case JfrJavaSupport::STACK_OVERFLOW:
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filename_fmt = vm_soe_filename_fmt;
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break;
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default:
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filename_fmt = vm_error_filename_fmt;
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}
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char* emergency_dump_path = NULL;
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pos += fsep_len;
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if (Arguments::copy_expand_pid(filename_fmt, strlen(filename_fmt), &buffer[pos], O_BUFLEN - pos)) {
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const size_t emergency_filename_length = strlen(buffer);
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emergency_dump_path = NEW_RESOURCE_ARRAY_RETURN_NULL(char, emergency_filename_length + 1);
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if (NULL == emergency_dump_path) {
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return NULL;
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}
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strncpy(emergency_dump_path, buffer, emergency_filename_length);
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emergency_dump_path[emergency_filename_length] = '\0';
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}
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return emergency_dump_path;
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}
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// Caller needs ResourceMark
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static const char* create_emergency_chunk_path(const char* repository_base, size_t repository_len) {
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assert(repository_base != NULL, "invariant");
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assert(JfrStream_lock->owned_by_self(), "invariant");
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// date time
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char date_time_buffer[32] = {0};
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date_time(date_time_buffer, sizeof(date_time_buffer));
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size_t date_time_len = strlen(date_time_buffer);
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size_t chunkname_max_len = repository_len // repository_base
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+ 1 // "/"
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+ date_time_len // date_time
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+ strlen(chunk_file_jfr_ext) // .jfr
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+ 1;
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char* chunk_path = NEW_RESOURCE_ARRAY_RETURN_NULL(char, chunkname_max_len);
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if (chunk_path == NULL) {
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return NULL;
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}
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// append the individual substrings
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jio_snprintf(chunk_path, chunkname_max_len, "%s%s%s%s", repository_base, os::file_separator(), date_time_buffer, chunk_file_jfr_ext);
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return chunk_path;
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}
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static fio_fd emergency_dump_file() {
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assert(JfrStream_lock->owned_by_self(), "invariant");
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ResourceMark rm;
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const char* const emergency_dump_path = create_emergency_dump_path();
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if (emergency_dump_path == NULL) {
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return invalid_fd;
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}
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const fio_fd fd = open_exclusivly(emergency_dump_path);
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if (fd != invalid_fd) {
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log_info(jfr)( // For user, should not be "jfr, system"
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"Attempting to recover JFR data, emergency jfr file: %s", emergency_dump_path);
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}
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379 |
return fd;
|
|
380 |
}
|
|
381 |
|
|
382 |
static const char* emergency_path(const char* repository, size_t repository_len) {
|
|
383 |
return repository == NULL ? create_emergency_dump_path() : create_emergency_chunk_path(repository, repository_len);
|
|
384 |
}
|
|
385 |
|
|
386 |
void JfrRepository::on_vm_error() {
|
|
387 |
assert(!JfrStream_lock->owned_by_self(), "invariant");
|
|
388 |
const char* path = _path;
|
|
389 |
if (path == NULL) {
|
|
390 |
// completed already
|
|
391 |
return;
|
|
392 |
}
|
|
393 |
ResourceMark rm;
|
|
394 |
MutexLockerEx stream_lock(JfrStream_lock, Mutex::_no_safepoint_check_flag);
|
|
395 |
const fio_fd emergency_fd = emergency_dump_file();
|
|
396 |
if (emergency_fd != invalid_fd) {
|
|
397 |
RepositoryIterator iterator(path, strlen(path));
|
|
398 |
write_emergency_file(emergency_fd, iterator);
|
|
399 |
os::close(emergency_fd);
|
|
400 |
}
|
|
401 |
}
|
|
402 |
|
|
403 |
bool JfrRepository::set_path(const char* path) {
|
|
404 |
assert(path != NULL, "trying to set the repository path with a NULL string!");
|
|
405 |
if (_path != NULL) {
|
|
406 |
// delete existing
|
|
407 |
JfrCHeapObj::free(_path, strlen(_path) + 1);
|
|
408 |
}
|
|
409 |
const size_t path_len = strlen(path);
|
|
410 |
_path = JfrCHeapObj::new_array<char>(path_len + 1);
|
|
411 |
if (_path == NULL) {
|
|
412 |
return false;
|
|
413 |
}
|
|
414 |
strncpy(_path, path, path_len);
|
|
415 |
_path[path_len] = '\0';
|
|
416 |
return true;
|
|
417 |
}
|
|
418 |
|
|
419 |
void JfrRepository::set_chunk_path(const char* path) {
|
|
420 |
assert(JfrStream_lock->owned_by_self(), "invariant");
|
|
421 |
chunkwriter().set_chunk_path(path);
|
|
422 |
}
|
|
423 |
|
|
424 |
void JfrRepository::notify_on_new_chunk_path() {
|
|
425 |
if (Jfr::is_recording()) {
|
|
426 |
instance()._post_box.post(MSG_ROTATE);
|
|
427 |
}
|
|
428 |
}
|
|
429 |
|
|
430 |
/**
|
|
431 |
* Sets the file where data should be written.
|
|
432 |
*
|
|
433 |
* Recording Previous Current Action
|
|
434 |
* ==============================================
|
|
435 |
* true null null Ignore, keep recording in-memory
|
|
436 |
* true null file1 Start disk recording
|
|
437 |
* true file null Copy out metadata to disk and continue in-memory recording
|
|
438 |
* true file1 file2 Copy out metadata and start with new File (file2)
|
|
439 |
* false * null Ignore, but start recording to memory
|
|
440 |
* false * file Ignore, but start recording to disk
|
|
441 |
*/
|
|
442 |
void JfrRepository::set_chunk_path(jstring path, JavaThread* jt) {
|
|
443 |
DEBUG_ONLY(JfrJavaSupport::check_java_thread_in_vm(jt));
|
|
444 |
ResourceMark rm(jt);
|
|
445 |
const char* const canonical_chunk_path = JfrJavaSupport::c_str(path, jt);
|
|
446 |
{
|
|
447 |
MutexLockerEx stream_lock(JfrStream_lock, Mutex::_no_safepoint_check_flag);
|
|
448 |
if (NULL == canonical_chunk_path && !_chunkwriter->is_valid()) {
|
|
449 |
// new output is NULL and current output is NULL
|
|
450 |
return;
|
|
451 |
}
|
|
452 |
instance().set_chunk_path(canonical_chunk_path);
|
|
453 |
}
|
|
454 |
notify_on_new_chunk_path();
|
|
455 |
}
|
|
456 |
|
|
457 |
void JfrRepository::set_path(jstring location, JavaThread* jt) {
|
|
458 |
DEBUG_ONLY(JfrJavaSupport::check_java_thread_in_vm(jt));
|
|
459 |
ResourceMark rm(jt);
|
|
460 |
const char* const path = JfrJavaSupport::c_str(location, jt);
|
|
461 |
if (path != NULL) {
|
|
462 |
instance().set_path(path);
|
|
463 |
}
|
|
464 |
}
|
|
465 |
|
|
466 |
bool JfrRepository::open_chunk(bool vm_error /* false */) {
|
|
467 |
assert(JfrStream_lock->owned_by_self(), "invariant");
|
|
468 |
if (vm_error) {
|
|
469 |
ResourceMark rm;
|
|
470 |
const char* repository_path = _path;
|
|
471 |
const size_t repository_path_len = repository_path != NULL ? strlen(repository_path) : 0;
|
|
472 |
const char* const path = emergency_path(repository_path, repository_path_len);
|
|
473 |
_chunkwriter->set_chunk_path(path);
|
|
474 |
}
|
|
475 |
return _chunkwriter->open();
|
|
476 |
}
|
|
477 |
|
|
478 |
size_t JfrRepository::close_chunk(jlong metadata_offset) {
|
|
479 |
return _chunkwriter->close(metadata_offset);
|
|
480 |
}
|