Quelle logFileStreamOutput.cpp Sprache: C

/*
* Copyright (c) 2015, 2022, 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 "jvm.h"
#include "logging/logAsyncWriter.hpp"
#include "logging/logDecorations.hpp"
#include "logging/logDecorators.hpp"
#include "logging/logFileStreamOutput.hpp"
#include "logging/logMessageBuffer.hpp"
#include "memory/allocation.inline.hpp"
#include "utilities/defaultStream.hpp"

const char* const LogFileStreamOutput::FoldMultilinesOptionKey = "foldmultilines";
LogStdoutOutput* StdoutLog = nullptr;
LogStderrOutput* StderrLog = nullptr;

bool LogFileStreamOutput::set_option(const char* key, const char* value, outputStream* errstream) {
  bool success = false;
  if (strcmp(FoldMultilinesOptionKey, key) == 0) {
    if (strcmp(value, "true") == 0) {
      _fold_multilines = true;
      success = true;
    } else if (strcmp(value, "false") == 0) {
      _fold_multilines = false;
      success = true;
    } else {
      errstream->print_cr("Invalid option: %s must be 'true' or 'false'.", key);
    }
  }
  return success;
}

int LogFileStreamOutput::write_decorations(const LogDecorations& decorations) {
  int total_written = 0;
  char buf[LogDecorations::max_decoration_size + 1];

  for (uint i = 0; i < LogDecorators::Count; i++) {
    LogDecorators::Decorator decorator = static_cast<LogDecorators::Decorator>(i);
    if (!_decorators.is_decorator(decorator)) {
      continue;
    }

    int written = jio_fprintf(_stream, "[%-*s]",
                              _decorator_padding[decorator],
                              decorations.decoration(decorator, buf, sizeof(buf)));
    if (written <= 0) {
      return -1;
    } else if (static_cast<size_t>(written - 2) > _decorator_padding[decorator]) {
      _decorator_padding[decorator] = written - 2;
    }
    total_written += written;
  }
  return total_written;
}

class FileLocker : public StackObj {
private:
  FILE *_file;

public:
  FileLocker(FILE *file) : _file(file) {
    os::flockfile(_file);
  }

  ~FileLocker() {
    os::funlockfile(_file);
  }
};

bool LogFileStreamOutput::flush() {
  bool result = true;
  if (fflush(_stream) != 0) {
    if (!_write_error_is_shown) {
      jio_fprintf(defaultStream::error_stream(),
                  "Could not flush log: %s (%s (%d))\n", name(), os::strerror(errno), errno);
      jio_fprintf(_stream, "\nERROR: Could not flush log (%d)\n", errno);
      _write_error_is_shown = true;
    }
    result = false;
  }
  return result;
}

#define WRITE_LOG_WITH_RESULT_CHECK(op, total)                \
{                                                             \
  int result = op;                                            \
  if (result < 0) {                                           \
    if (!_write_error_is_shown) {                             \
      jio_fprintf(defaultStream::error_stream(),              \
                  "Could not write log: %s\n", name());       \
      jio_fprintf(_stream, "\nERROR: Could not write log\n"); \
      _write_error_is_shown = true;                           \
      return -1;                                              \
    }                                                         \
  }                                                           \
  total += result;                                            \
}

int LogFileStreamOutput::write_internal(const LogDecorations& decorations, const char* msg) {
  int written = 0;
  const bool use_decorations = !_decorators.is_empty();

  if (use_decorations) {
    WRITE_LOG_WITH_RESULT_CHECK(write_decorations(decorations), written);
    WRITE_LOG_WITH_RESULT_CHECK(jio_fprintf(_stream, " "), written);
  }

  if (!_fold_multilines) {
    WRITE_LOG_WITH_RESULT_CHECK(jio_fprintf(_stream, "%s\n", msg), written);
  } else {
    char *dupstr = os::strdup_check_oom(msg, mtLogging);
    char *cur = dupstr;
    char *next;
    do {
      next = strpbrk(cur, "\n\\");
      if (next == NULL) {
        WRITE_LOG_WITH_RESULT_CHECK(jio_fprintf(_stream, "%s\n", cur), written);
      } else {
        const char *found = (*next == '\n') ? "\\n" : "\\\\";
        *next = '\0';
        WRITE_LOG_WITH_RESULT_CHECK(jio_fprintf(_stream, "%s%s", cur, found), written);
        cur = next + 1;
      }
    } while (next != NULL);
    os::free(dupstr);
  }
  return written;
}

int LogFileStreamOutput::write_blocking(const LogDecorations& decorations, const char* msg) {
  int written = write_internal(decorations, msg);
  return flush() ? written : -1;
}

int LogFileStreamOutput::write(const LogDecorations& decorations, const char* msg) {
  AsyncLogWriter* aio_writer = AsyncLogWriter::instance();
  if (aio_writer != nullptr) {
    aio_writer->enqueue(*this, decorations, msg);
    return 0;
  }

  FileLocker flocker(_stream);
  int written = write_internal(decorations, msg);

  return flush() ? written : -1;
}

int LogFileStreamOutput::write(LogMessageBuffer::Iterator msg_iterator) {
  AsyncLogWriter* aio_writer = AsyncLogWriter::instance();
  if (aio_writer != nullptr) {
    aio_writer->enqueue(*this, msg_iterator);
    return 0;
  }

  int written = 0;
  FileLocker flocker(_stream);
  for (; !msg_iterator.is_at_end(); msg_iterator++) {
    written += write_internal(msg_iterator.decorations(), msg_iterator.message());
  }

  return flush() ? written : -1;
}

void LogFileStreamOutput::describe(outputStream *out) {
  LogOutput::describe(out);
  out->print(" ");

  out->print("foldmultilines=%s", _fold_multilines ? "true" : "false");
}

quality92%

¤ Dauer der Verarbeitung: 0.14 Sekunden (vorverarbeitet) ¤

Wurzel

Suchen

Beweissystem der NASA

Beweissystem Isabelle

NIST Cobol Testsuite

Cephes Mathematical Library

Wiener Entwicklungsmethode

Haftungshinweis

Die Informationen auf dieser Webseite wurden nach bestem Wissen sorgfältig zusammengestellt. Es wird jedoch weder Vollständigkeit, noch Richtigkeit, noch Qualität der bereit gestellten Informationen zugesichert.

Bemerkung:

Die farbliche Syntaxdarstellung ist noch experimentell.