author | goetz |
Mon, 28 Sep 2015 12:57:47 +0200 | |
changeset 33120 | 63aca8d49f2a |
parent 33097 | 96e348cb0442 |
child 34637 | 9b9298044d23 |
permissions | -rw-r--r-- |
33097 | 1 |
/* |
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* Copyright (c) 2015, 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 "logging/log.hpp" |
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#include "logging/logConfiguration.hpp" |
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#include "logging/logFileOutput.hpp" |
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#include "memory/allocation.inline.hpp" |
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#include "runtime/mutexLocker.hpp" |
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#include "runtime/os.inline.hpp" |
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#include "utilities/globalDefinitions.hpp" |
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#include "utilities/defaultStream.hpp" |
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const char* LogFileOutput::FileOpenMode = "a"; |
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const char* LogFileOutput::PidFilenamePlaceholder = "%p"; |
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const char* LogFileOutput::TimestampFilenamePlaceholder = "%t"; |
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const char* LogFileOutput::TimestampFormat = "%Y-%m-%d_%H-%M-%S"; |
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const char* LogFileOutput::FileSizeOptionKey = "filesize"; |
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const char* LogFileOutput::FileCountOptionKey = "filecount"; |
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char LogFileOutput::_pid_str[PidBufferSize]; |
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char LogFileOutput::_vm_start_time_str[StartTimeBufferSize]; |
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LogFileOutput::LogFileOutput(const char* name) |
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: LogFileStreamOutput(NULL), _name(os::strdup_check_oom(name, mtLogging)), |
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_file_name(NULL), _archive_name(NULL), _archive_name_len(0), _current_size(0), |
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_rotate_size(0), _current_file(1), _file_count(0), |
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_rotation_lock(Mutex::leaf, "LogFileOutput rotation lock", true, Mutex::_safepoint_check_sometimes) { |
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_file_name = make_file_name(name, _pid_str, _vm_start_time_str); |
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} |
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void LogFileOutput::set_file_name_parameters(jlong vm_start_time) { |
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int res = jio_snprintf(_pid_str, sizeof(_pid_str), "%d", os::current_process_id()); |
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assert(res > 0, "PID buffer too small"); |
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struct tm local_time; |
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time_t utc_time = vm_start_time / 1000; |
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os::localtime_pd(&utc_time, &local_time); |
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res = (int)strftime(_vm_start_time_str, sizeof(_vm_start_time_str), TimestampFormat, &local_time); |
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assert(res > 0, "VM start time buffer too small."); |
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} |
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LogFileOutput::~LogFileOutput() { |
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if (_stream != NULL) { |
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if (_archive_name != NULL) { |
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archive(); |
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} |
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if (fclose(_stream) != 0) { |
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jio_fprintf(defaultStream::error_stream(), "Could not close log file '%s' (%s).\n", |
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_file_name, strerror(errno)); |
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} |
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} |
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os::free(_archive_name); |
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os::free(_file_name); |
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os::free(const_cast<char*>(_name)); |
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} |
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size_t LogFileOutput::parse_value(const char* value_str) { |
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char* end; |
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unsigned long long value = strtoull(value_str, &end, 10); |
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if (!isdigit(*value_str) || end != value_str + strlen(value_str) || value >= SIZE_MAX) { |
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return SIZE_MAX; |
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} |
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return value; |
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} |
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bool LogFileOutput::configure_rotation(const char* options) { |
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if (options == NULL || strlen(options) == 0) { |
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return true; |
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} |
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bool success = true; |
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char* opts = os::strdup_check_oom(options, mtLogging); |
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char* comma_pos; |
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char* pos = opts; |
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do { |
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comma_pos = strchr(pos, ','); |
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if (comma_pos != NULL) { |
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*comma_pos = '\0'; |
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} |
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char* equals_pos = strchr(pos, '='); |
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if (equals_pos == NULL) { |
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success = false; |
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break; |
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} |
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char* key = pos; |
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char* value_str = equals_pos + 1; |
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*equals_pos = '\0'; |
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if (strcmp(FileCountOptionKey, key) == 0) { |
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size_t value = parse_value(value_str); |
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if (value == SIZE_MAX || value >= UINT_MAX) { |
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success = false; |
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break; |
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} |
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_file_count = static_cast<uint>(value); |
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_file_count_max_digits = static_cast<uint>(log10(static_cast<double>(_file_count)) + 1); |
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_archive_name_len = 2 + strlen(_file_name) + _file_count_max_digits; |
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_archive_name = NEW_C_HEAP_ARRAY(char, _archive_name_len, mtLogging); |
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} else if (strcmp(FileSizeOptionKey, key) == 0) { |
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size_t value = parse_value(value_str); |
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if (value == SIZE_MAX || value > SIZE_MAX / K) { |
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success = false; |
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break; |
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} |
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_rotate_size = value * K; |
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} else { |
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success = false; |
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break; |
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} |
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pos = comma_pos + 1; |
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} while (comma_pos != NULL); |
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os::free(opts); |
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return success; |
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} |
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bool LogFileOutput::initialize(const char* options) { |
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if (!configure_rotation(options)) { |
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return false; |
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} |
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_stream = fopen(_file_name, FileOpenMode); |
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if (_stream == NULL) { |
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log_error(logging)("Could not open log file '%s' (%s).\n", _file_name, strerror(errno)); |
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return false; |
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} |
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return true; |
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} |
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int LogFileOutput::write(const LogDecorations& decorations, const char* msg) { |
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if (_stream == NULL) { |
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// An error has occurred with this output, avoid writing to it. |
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return 0; |
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} |
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int written = LogFileStreamOutput::write(decorations, msg); |
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_current_size += written; |
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if (should_rotate()) { |
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MutexLockerEx ml(&_rotation_lock, true /* no safepoint check */); |
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if (should_rotate()) { |
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rotate(); |
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} |
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} |
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return written; |
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} |
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void LogFileOutput::archive() { |
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assert(_archive_name != NULL && _archive_name_len > 0, "Rotation must be configured before using this function."); |
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int ret = jio_snprintf(_archive_name, _archive_name_len, "%s.%0*u", |
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_file_name, _file_count_max_digits, _current_file); |
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assert(ret >= 0, "Buffer should always be large enough"); |
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// Attempt to remove possibly existing archived log file before we rename. |
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// Don't care if it fails, we really only care about the rename that follows. |
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remove(_archive_name); |
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// Rename the file from ex hotspot.log to hotspot.log.2 |
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if (rename(_file_name, _archive_name) == -1) { |
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jio_fprintf(defaultStream::error_stream(), "Could not rename log file '%s' to '%s' (%s).\n", |
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_file_name, _archive_name, strerror(errno)); |
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} |
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} |
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void LogFileOutput::rotate() { |
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// Archive the current log file |
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archive(); |
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// Open the active log file using the same stream as before |
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_stream = freopen(_file_name, FileOpenMode, _stream); |
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if (_stream == NULL) { |
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jio_fprintf(defaultStream::error_stream(), "Could not reopen file '%s' during log rotation (%s).\n", |
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_file_name, strerror(errno)); |
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return; |
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} |
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// Reset accumulated size, increase current file counter, and check for file count wrap-around. |
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_current_size = 0; |
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_current_file = (_current_file >= _file_count ? 1 : _current_file + 1); |
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} |
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char* LogFileOutput::make_file_name(const char* file_name, |
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const char* pid_string, |
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const char* timestamp_string) { |
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char* result = NULL; |
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// Lets start finding out if we have any %d and/or %t in the name. |
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// We will only replace the first occurrence of any placeholder |
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const char* pid = strstr(file_name, PidFilenamePlaceholder); |
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const char* timestamp = strstr(file_name, TimestampFilenamePlaceholder); |
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if (pid == NULL && timestamp == NULL) { |
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// We found no place-holders, return the simple filename |
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return os::strdup_check_oom(file_name, mtLogging); |
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} |
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// At least one of the place-holders were found in the file_name |
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const char* first = ""; |
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33120
63aca8d49f2a
8137260: fix warning after "8046148: JEP 158: Unified JVM Logging"
goetz
parents:
33097
diff
changeset
|
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size_t first_pos = SIZE_MAX; |
33097 | 220 |
size_t first_replace_len = 0; |
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const char* second = ""; |
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33120
63aca8d49f2a
8137260: fix warning after "8046148: JEP 158: Unified JVM Logging"
goetz
parents:
33097
diff
changeset
|
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size_t second_pos = SIZE_MAX; |
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size_t second_replace_len = 0; |
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// If we found a %p, then setup our variables accordingly |
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if (pid != NULL) { |
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if (timestamp == NULL || pid < timestamp) { |
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first = pid_string; |
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first_pos = pid - file_name; |
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first_replace_len = strlen(PidFilenamePlaceholder); |
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} else { |
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second = pid_string; |
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second_pos = pid - file_name; |
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second_replace_len = strlen(PidFilenamePlaceholder); |
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} |
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} |
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if (timestamp != NULL) { |
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if (pid == NULL || timestamp < pid) { |
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first = timestamp_string; |
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first_pos = timestamp - file_name; |
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first_replace_len = strlen(TimestampFilenamePlaceholder); |
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} else { |
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second = timestamp_string; |
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second_pos = timestamp - file_name; |
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second_replace_len = strlen(TimestampFilenamePlaceholder); |
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} |
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} |
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size_t first_len = strlen(first); |
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size_t second_len = strlen(second); |
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// Allocate the new buffer, size it to hold all we want to put in there +1. |
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size_t result_len = strlen(file_name) + first_len - first_replace_len + second_len - second_replace_len; |
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result = NEW_C_HEAP_ARRAY(char, result_len + 1, mtLogging); |
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// Assemble the strings |
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size_t file_name_pos = 0; |
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size_t i = 0; |
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while (i < result_len) { |
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if (file_name_pos == first_pos) { |
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// We are in the range of the first placeholder |
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strcpy(result + i, first); |
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// Bump output buffer position with length of replacing string |
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i += first_len; |
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// Bump source buffer position to skip placeholder |
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file_name_pos += first_replace_len; |
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} else if (file_name_pos == second_pos) { |
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// We are in the range of the second placeholder |
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strcpy(result + i, second); |
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i += second_len; |
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file_name_pos += second_replace_len; |
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} else { |
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// Else, copy char by char of the original file |
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result[i] = file_name[file_name_pos++]; |
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i++; |
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} |
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} |
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// Add terminating char |
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result[result_len] = '\0'; |
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return result; |
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} |