2089 lines
69 KiB
C++
2089 lines
69 KiB
C++
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// Copyright (c) 1999, Google Inc.
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following disclaimer
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// in the documentation and/or other materials provided with the
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// distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived from
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// this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#define _GNU_SOURCE 1 // needed for O_NOFOLLOW and pread()/pwrite()
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#include "utilities.h"
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#include <algorithm>
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#include <assert.h>
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#include <iomanip>
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#include <string>
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#ifdef HAVE_UNISTD_H
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# include <unistd.h> // For _exit.
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#endif
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#include <climits>
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#include <sys/types.h>
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#include <sys/stat.h>
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#ifdef HAVE_SYS_UTSNAME_H
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# include <sys/utsname.h> // For uname.
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#endif
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#include <fcntl.h>
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#include <cstdio>
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#include <iostream>
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#include <stdarg.h>
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#include <stdlib.h>
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#ifdef HAVE_PWD_H
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# include <pwd.h>
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#endif
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#ifdef HAVE_SYSLOG_H
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# include <syslog.h>
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#endif
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#include <vector>
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#include <errno.h> // for errno
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#include <sstream>
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#include "base/commandlineflags.h" // to get the program name
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#include "glog/logging.h"
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#include "glog/raw_logging.h"
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#include "base/googleinit.h"
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#ifdef HAVE_STACKTRACE
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# include "stacktrace.h"
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#endif
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using std::string;
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using std::vector;
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using std::setw;
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using std::setfill;
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using std::hex;
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using std::dec;
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using std::min;
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using std::ostream;
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using std::ostringstream;
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using std::FILE;
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using std::fwrite;
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using std::fclose;
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using std::fflush;
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using std::fprintf;
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using std::perror;
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#ifdef __QNX__
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using std::fdopen;
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#endif
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#ifdef _WIN32
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#define fdopen _fdopen
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#endif
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// There is no thread annotation support.
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#define EXCLUSIVE_LOCKS_REQUIRED(mu)
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static bool BoolFromEnv(const char *varname, bool defval) {
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const char* const valstr = getenv(varname);
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if (!valstr) {
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return defval;
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}
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return memchr("tTyY1\0", valstr[0], 6) != NULL;
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}
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GLOG_DEFINE_bool(logtostderr, BoolFromEnv("GOOGLE_LOGTOSTDERR", false),
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"log messages go to stderr instead of logfiles");
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GLOG_DEFINE_bool(alsologtostderr, BoolFromEnv("GOOGLE_ALSOLOGTOSTDERR", false),
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"log messages go to stderr in addition to logfiles");
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GLOG_DEFINE_bool(colorlogtostderr, false,
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"color messages logged to stderr (if supported by terminal)");
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#ifdef OS_LINUX
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GLOG_DEFINE_bool(drop_log_memory, true, "Drop in-memory buffers of log contents. "
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"Logs can grow very quickly and they are rarely read before they "
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"need to be evicted from memory. Instead, drop them from memory "
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"as soon as they are flushed to disk.");
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_START_GOOGLE_NAMESPACE_
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namespace logging {
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static const int64 kPageSize = getpagesize();
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}
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_END_GOOGLE_NAMESPACE_
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#endif
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// By default, errors (including fatal errors) get logged to stderr as
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// well as the file.
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//
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// The default is ERROR instead of FATAL so that users can see problems
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// when they run a program without having to look in another file.
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DEFINE_int32(stderrthreshold,
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GOOGLE_NAMESPACE::GLOG_ERROR,
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"log messages at or above this level are copied to stderr in "
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"addition to logfiles. This flag obsoletes --alsologtostderr.");
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GLOG_DEFINE_string(alsologtoemail, "",
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"log messages go to these email addresses "
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"in addition to logfiles");
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GLOG_DEFINE_bool(log_prefix, true,
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"Prepend the log prefix to the start of each log line");
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GLOG_DEFINE_int32(minloglevel, 0, "Messages logged at a lower level than this don't "
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"actually get logged anywhere");
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GLOG_DEFINE_int32(logbuflevel, 0,
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"Buffer log messages logged at this level or lower"
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" (-1 means don't buffer; 0 means buffer INFO only;"
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" ...)");
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GLOG_DEFINE_int32(logbufsecs, 30,
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"Buffer log messages for at most this many seconds");
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GLOG_DEFINE_int32(logemaillevel, 999,
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"Email log messages logged at this level or higher"
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" (0 means email all; 3 means email FATAL only;"
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" ...)");
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GLOG_DEFINE_string(logmailer, "/bin/mail",
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"Mailer used to send logging email");
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// Compute the default value for --log_dir
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static const char* DefaultLogDir() {
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const char* env;
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env = getenv("GOOGLE_LOG_DIR");
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if (env != NULL && env[0] != '\0') {
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return env;
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}
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env = getenv("TEST_TMPDIR");
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if (env != NULL && env[0] != '\0') {
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return env;
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}
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return "";
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}
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GLOG_DEFINE_int32(logfile_mode, 0664, "Log file mode/permissions.");
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GLOG_DEFINE_string(log_dir, DefaultLogDir(),
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"If specified, logfiles are written into this directory instead "
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"of the default logging directory.");
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GLOG_DEFINE_string(log_link, "", "Put additional links to the log "
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"files in this directory");
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GLOG_DEFINE_int32(max_log_size, 1800,
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"approx. maximum log file size (in MB). A value of 0 will "
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"be silently overridden to 1.");
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GLOG_DEFINE_bool(stop_logging_if_full_disk, false,
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"Stop attempting to log to disk if the disk is full.");
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GLOG_DEFINE_string(log_backtrace_at, "",
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"Emit a backtrace when logging at file:linenum.");
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// TODO(hamaji): consider windows
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#define PATH_SEPARATOR '/'
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#ifndef HAVE_PREAD
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#if defined(OS_WINDOWS)
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#include <BaseTsd.h>
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#define ssize_t SSIZE_T
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#endif
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static ssize_t pread(int fd, void* buf, size_t count, off_t offset) {
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off_t orig_offset = lseek(fd, 0, SEEK_CUR);
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if (orig_offset == (off_t)-1)
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return -1;
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if (lseek(fd, offset, SEEK_CUR) == (off_t)-1)
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return -1;
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ssize_t len = read(fd, buf, count);
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if (len < 0)
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return len;
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if (lseek(fd, orig_offset, SEEK_SET) == (off_t)-1)
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return -1;
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return len;
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}
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#endif // !HAVE_PREAD
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#ifndef HAVE_PWRITE
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static ssize_t pwrite(int fd, void* buf, size_t count, off_t offset) {
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off_t orig_offset = lseek(fd, 0, SEEK_CUR);
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if (orig_offset == (off_t)-1)
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return -1;
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if (lseek(fd, offset, SEEK_CUR) == (off_t)-1)
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return -1;
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ssize_t len = write(fd, buf, count);
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if (len < 0)
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return len;
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if (lseek(fd, orig_offset, SEEK_SET) == (off_t)-1)
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return -1;
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return len;
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}
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#endif // !HAVE_PWRITE
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static void GetHostName(string* hostname) {
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#if defined(HAVE_SYS_UTSNAME_H)
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struct utsname buf;
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if (0 != uname(&buf)) {
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// ensure null termination on failure
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*buf.nodename = '\0';
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}
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*hostname = buf.nodename;
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#elif defined(OS_WINDOWS)
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char buf[MAX_COMPUTERNAME_LENGTH + 1];
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DWORD len = MAX_COMPUTERNAME_LENGTH + 1;
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if (GetComputerNameA(buf, &len)) {
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*hostname = buf;
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} else {
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hostname->clear();
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}
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#else
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# warning There is no way to retrieve the host name.
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*hostname = "(unknown)";
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#endif
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}
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// Returns true iff terminal supports using colors in output.
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static bool TerminalSupportsColor() {
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bool term_supports_color = false;
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#ifdef OS_WINDOWS
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// on Windows TERM variable is usually not set, but the console does
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// support colors.
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term_supports_color = true;
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#else
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// On non-Windows platforms, we rely on the TERM variable.
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const char* const term = getenv("TERM");
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if (term != NULL && term[0] != '\0') {
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term_supports_color =
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!strcmp(term, "xterm") ||
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!strcmp(term, "xterm-color") ||
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!strcmp(term, "xterm-256color") ||
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!strcmp(term, "screen-256color") ||
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!strcmp(term, "screen") ||
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!strcmp(term, "linux") ||
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!strcmp(term, "cygwin");
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}
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#endif
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return term_supports_color;
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}
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_START_GOOGLE_NAMESPACE_
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enum GLogColor {
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COLOR_DEFAULT,
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COLOR_RED,
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COLOR_GREEN,
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COLOR_YELLOW
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};
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static GLogColor SeverityToColor(LogSeverity severity) {
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assert(severity >= 0 && severity < NUM_SEVERITIES);
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GLogColor color = COLOR_DEFAULT;
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switch (severity) {
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case GLOG_INFO:
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color = COLOR_DEFAULT;
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break;
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case GLOG_WARNING:
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color = COLOR_YELLOW;
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break;
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case GLOG_ERROR:
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case GLOG_FATAL:
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color = COLOR_RED;
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break;
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default:
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// should never get here.
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assert(false);
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}
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return color;
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}
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#ifdef OS_WINDOWS
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// Returns the character attribute for the given color.
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WORD GetColorAttribute(GLogColor color) {
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switch (color) {
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case COLOR_RED: return FOREGROUND_RED;
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case COLOR_GREEN: return FOREGROUND_GREEN;
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case COLOR_YELLOW: return FOREGROUND_RED | FOREGROUND_GREEN;
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default: return 0;
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}
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}
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#else
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// Returns the ANSI color code for the given color.
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const char* GetAnsiColorCode(GLogColor color) {
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switch (color) {
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case COLOR_RED: return "1";
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case COLOR_GREEN: return "2";
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case COLOR_YELLOW: return "3";
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case COLOR_DEFAULT: return "";
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};
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return NULL; // stop warning about return type.
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}
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#endif // OS_WINDOWS
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// Safely get max_log_size, overriding to 1 if it somehow gets defined as 0
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static int32 MaxLogSize() {
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return (FLAGS_max_log_size > 0 ? FLAGS_max_log_size : 1);
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}
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// An arbitrary limit on the length of a single log message. This
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// is so that streaming can be done more efficiently.
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const size_t LogMessage::kMaxLogMessageLen = 30000;
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struct LogMessage::LogMessageData {
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LogMessageData();
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int preserved_errno_; // preserved errno
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// Buffer space; contains complete message text.
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char message_text_[LogMessage::kMaxLogMessageLen+1];
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LogStream stream_;
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char severity_; // What level is this LogMessage logged at?
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int line_; // line number where logging call is.
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void (LogMessage::*send_method_)(); // Call this in destructor to send
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union { // At most one of these is used: union to keep the size low.
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LogSink* sink_; // NULL or sink to send message to
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std::vector<std::string>* outvec_; // NULL or vector to push message onto
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std::string* message_; // NULL or string to write message into
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};
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time_t timestamp_; // Time of creation of LogMessage
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struct ::tm tm_time_; // Time of creation of LogMessage
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size_t num_prefix_chars_; // # of chars of prefix in this message
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size_t num_chars_to_log_; // # of chars of msg to send to log
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size_t num_chars_to_syslog_; // # of chars of msg to send to syslog
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const char* basename_; // basename of file that called LOG
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const char* fullname_; // fullname of file that called LOG
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bool has_been_flushed_; // false => data has not been flushed
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bool first_fatal_; // true => this was first fatal msg
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private:
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LogMessageData(const LogMessageData&);
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void operator=(const LogMessageData&);
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};
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// A mutex that allows only one thread to log at a time, to keep things from
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// getting jumbled. Some other very uncommon logging operations (like
|
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// changing the destination file for log messages of a given severity) also
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// lock this mutex. Please be sure that anybody who might possibly need to
|
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// lock it does so.
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static Mutex log_mutex;
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// Number of messages sent at each severity. Under log_mutex.
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int64 LogMessage::num_messages_[NUM_SEVERITIES] = {0, 0, 0, 0};
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// Globally disable log writing (if disk is full)
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static bool stop_writing = false;
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const char*const LogSeverityNames[NUM_SEVERITIES] = {
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"INFO", "WARNING", "ERROR", "FATAL"
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};
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||
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// Has the user called SetExitOnDFatal(true)?
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||
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static bool exit_on_dfatal = true;
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||
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const char* GetLogSeverityName(LogSeverity severity) {
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||
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return LogSeverityNames[severity];
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}
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||
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|
||
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static bool SendEmailInternal(const char*dest, const char *subject,
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||
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const char*body, bool use_logging);
|
||
|
|
||
|
base::Logger::~Logger() {
|
||
|
}
|
||
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|
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namespace {
|
||
|
|
||
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// Encapsulates all file-system related state
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||
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class LogFileObject : public base::Logger {
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||
|
public:
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||
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LogFileObject(LogSeverity severity, const char* base_filename);
|
||
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~LogFileObject();
|
||
|
|
||
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virtual void Write(bool force_flush, // Should we force a flush here?
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||
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time_t timestamp, // Timestamp for this entry
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||
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const char* message,
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||
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int message_len);
|
||
|
|
||
|
// Configuration options
|
||
|
void SetBasename(const char* basename);
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||
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void SetExtension(const char* ext);
|
||
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void SetSymlinkBasename(const char* symlink_basename);
|
||
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|
||
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// Normal flushing routine
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||
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virtual void Flush();
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||
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|
||
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// It is the actual file length for the system loggers,
|
||
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// i.e., INFO, ERROR, etc.
|
||
|
virtual uint32 LogSize() {
|
||
|
MutexLock l(&lock_);
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||
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return file_length_;
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||
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}
|
||
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|
||
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// Internal flush routine. Exposed so that FlushLogFilesUnsafe()
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||
|
// can avoid grabbing a lock. Usually Flush() calls it after
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||
|
// acquiring lock_.
|
||
|
void FlushUnlocked();
|
||
|
|
||
|
private:
|
||
|
static const uint32 kRolloverAttemptFrequency = 0x20;
|
||
|
|
||
|
Mutex lock_;
|
||
|
bool base_filename_selected_;
|
||
|
string base_filename_;
|
||
|
string symlink_basename_;
|
||
|
string filename_extension_; // option users can specify (eg to add port#)
|
||
|
FILE* file_;
|
||
|
LogSeverity severity_;
|
||
|
uint32 bytes_since_flush_;
|
||
|
uint32 file_length_;
|
||
|
unsigned int rollover_attempt_;
|
||
|
int64 next_flush_time_; // cycle count at which to flush log
|
||
|
|
||
|
// Actually create a logfile using the value of base_filename_ and the
|
||
|
// supplied argument time_pid_string
|
||
|
// REQUIRES: lock_ is held
|
||
|
bool CreateLogfile(const string& time_pid_string);
|
||
|
};
|
||
|
|
||
|
} // namespace
|
||
|
|
||
|
class LogDestination {
|
||
|
public:
|
||
|
friend class LogMessage;
|
||
|
friend void ReprintFatalMessage();
|
||
|
friend base::Logger* base::GetLogger(LogSeverity);
|
||
|
friend void base::SetLogger(LogSeverity, base::Logger*);
|
||
|
|
||
|
// These methods are just forwarded to by their global versions.
|
||
|
static void SetLogDestination(LogSeverity severity,
|
||
|
const char* base_filename);
|
||
|
static void SetLogSymlink(LogSeverity severity,
|
||
|
const char* symlink_basename);
|
||
|
static void AddLogSink(LogSink *destination);
|
||
|
static void RemoveLogSink(LogSink *destination);
|
||
|
static void SetLogFilenameExtension(const char* filename_extension);
|
||
|
static void SetStderrLogging(LogSeverity min_severity);
|
||
|
static void SetEmailLogging(LogSeverity min_severity, const char* addresses);
|
||
|
static void LogToStderr();
|
||
|
// Flush all log files that are at least at the given severity level
|
||
|
static void FlushLogFiles(int min_severity);
|
||
|
static void FlushLogFilesUnsafe(int min_severity);
|
||
|
|
||
|
// we set the maximum size of our packet to be 1400, the logic being
|
||
|
// to prevent fragmentation.
|
||
|
// Really this number is arbitrary.
|
||
|
static const int kNetworkBytes = 1400;
|
||
|
|
||
|
static const string& hostname();
|
||
|
static const bool& terminal_supports_color() {
|
||
|
return terminal_supports_color_;
|
||
|
}
|
||
|
|
||
|
static void DeleteLogDestinations();
|
||
|
|
||
|
private:
|
||
|
LogDestination(LogSeverity severity, const char* base_filename);
|
||
|
~LogDestination() { }
|
||
|
|
||
|
// Take a log message of a particular severity and log it to stderr
|
||
|
// iff it's of a high enough severity to deserve it.
|
||
|
static void MaybeLogToStderr(LogSeverity severity, const char* message,
|
||
|
size_t len);
|
||
|
|
||
|
// Take a log message of a particular severity and log it to email
|
||
|
// iff it's of a high enough severity to deserve it.
|
||
|
static void MaybeLogToEmail(LogSeverity severity, const char* message,
|
||
|
size_t len);
|
||
|
// Take a log message of a particular severity and log it to a file
|
||
|
// iff the base filename is not "" (which means "don't log to me")
|
||
|
static void MaybeLogToLogfile(LogSeverity severity,
|
||
|
time_t timestamp,
|
||
|
const char* message, size_t len);
|
||
|
// Take a log message of a particular severity and log it to the file
|
||
|
// for that severity and also for all files with severity less than
|
||
|
// this severity.
|
||
|
static void LogToAllLogfiles(LogSeverity severity,
|
||
|
time_t timestamp,
|
||
|
const char* message, size_t len);
|
||
|
|
||
|
// Send logging info to all registered sinks.
|
||
|
static void LogToSinks(LogSeverity severity,
|
||
|
const char *full_filename,
|
||
|
const char *base_filename,
|
||
|
int line,
|
||
|
const struct ::tm* tm_time,
|
||
|
const char* message,
|
||
|
size_t message_len);
|
||
|
|
||
|
// Wait for all registered sinks via WaitTillSent
|
||
|
// including the optional one in "data".
|
||
|
static void WaitForSinks(LogMessage::LogMessageData* data);
|
||
|
|
||
|
static LogDestination* log_destination(LogSeverity severity);
|
||
|
|
||
|
LogFileObject fileobject_;
|
||
|
base::Logger* logger_; // Either &fileobject_, or wrapper around it
|
||
|
|
||
|
static LogDestination* log_destinations_[NUM_SEVERITIES];
|
||
|
static LogSeverity email_logging_severity_;
|
||
|
static string addresses_;
|
||
|
static string hostname_;
|
||
|
static bool terminal_supports_color_;
|
||
|
|
||
|
// arbitrary global logging destinations.
|
||
|
static vector<LogSink*>* sinks_;
|
||
|
|
||
|
// Protects the vector sinks_,
|
||
|
// but not the LogSink objects its elements reference.
|
||
|
static Mutex sink_mutex_;
|
||
|
|
||
|
// Disallow
|
||
|
LogDestination(const LogDestination&);
|
||
|
LogDestination& operator=(const LogDestination&);
|
||
|
};
|
||
|
|
||
|
// Errors do not get logged to email by default.
|
||
|
LogSeverity LogDestination::email_logging_severity_ = 99999;
|
||
|
|
||
|
string LogDestination::addresses_;
|
||
|
string LogDestination::hostname_;
|
||
|
|
||
|
vector<LogSink*>* LogDestination::sinks_ = NULL;
|
||
|
Mutex LogDestination::sink_mutex_;
|
||
|
bool LogDestination::terminal_supports_color_ = TerminalSupportsColor();
|
||
|
|
||
|
/* static */
|
||
|
const string& LogDestination::hostname() {
|
||
|
if (hostname_.empty()) {
|
||
|
GetHostName(&hostname_);
|
||
|
if (hostname_.empty()) {
|
||
|
hostname_ = "(unknown)";
|
||
|
}
|
||
|
}
|
||
|
return hostname_;
|
||
|
}
|
||
|
|
||
|
LogDestination::LogDestination(LogSeverity severity,
|
||
|
const char* base_filename)
|
||
|
: fileobject_(severity, base_filename),
|
||
|
logger_(&fileobject_) {
|
||
|
}
|
||
|
|
||
|
inline void LogDestination::FlushLogFilesUnsafe(int min_severity) {
|
||
|
// assume we have the log_mutex or we simply don't care
|
||
|
// about it
|
||
|
for (int i = min_severity; i < NUM_SEVERITIES; i++) {
|
||
|
LogDestination* log = log_destinations_[i];
|
||
|
if (log != NULL) {
|
||
|
// Flush the base fileobject_ logger directly instead of going
|
||
|
// through any wrappers to reduce chance of deadlock.
|
||
|
log->fileobject_.FlushUnlocked();
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
|
||
|
inline void LogDestination::FlushLogFiles(int min_severity) {
|
||
|
// Prevent any subtle race conditions by wrapping a mutex lock around
|
||
|
// all this stuff.
|
||
|
MutexLock l(&log_mutex);
|
||
|
for (int i = min_severity; i < NUM_SEVERITIES; i++) {
|
||
|
LogDestination* log = log_destination(i);
|
||
|
if (log != NULL) {
|
||
|
log->logger_->Flush();
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
|
||
|
inline void LogDestination::SetLogDestination(LogSeverity severity,
|
||
|
const char* base_filename) {
|
||
|
assert(severity >= 0 && severity < NUM_SEVERITIES);
|
||
|
// Prevent any subtle race conditions by wrapping a mutex lock around
|
||
|
// all this stuff.
|
||
|
MutexLock l(&log_mutex);
|
||
|
log_destination(severity)->fileobject_.SetBasename(base_filename);
|
||
|
}
|
||
|
|
||
|
inline void LogDestination::SetLogSymlink(LogSeverity severity,
|
||
|
const char* symlink_basename) {
|
||
|
CHECK_GE(severity, 0);
|
||
|
CHECK_LT(severity, NUM_SEVERITIES);
|
||
|
MutexLock l(&log_mutex);
|
||
|
log_destination(severity)->fileobject_.SetSymlinkBasename(symlink_basename);
|
||
|
}
|
||
|
|
||
|
inline void LogDestination::AddLogSink(LogSink *destination) {
|
||
|
// Prevent any subtle race conditions by wrapping a mutex lock around
|
||
|
// all this stuff.
|
||
|
MutexLock l(&sink_mutex_);
|
||
|
if (!sinks_) sinks_ = new vector<LogSink*>;
|
||
|
sinks_->push_back(destination);
|
||
|
}
|
||
|
|
||
|
inline void LogDestination::RemoveLogSink(LogSink *destination) {
|
||
|
// Prevent any subtle race conditions by wrapping a mutex lock around
|
||
|
// all this stuff.
|
||
|
MutexLock l(&sink_mutex_);
|
||
|
// This doesn't keep the sinks in order, but who cares?
|
||
|
if (sinks_) {
|
||
|
for (int i = sinks_->size() - 1; i >= 0; i--) {
|
||
|
if ((*sinks_)[i] == destination) {
|
||
|
(*sinks_)[i] = (*sinks_)[sinks_->size() - 1];
|
||
|
sinks_->pop_back();
|
||
|
break;
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
|
||
|
inline void LogDestination::SetLogFilenameExtension(const char* ext) {
|
||
|
// Prevent any subtle race conditions by wrapping a mutex lock around
|
||
|
// all this stuff.
|
||
|
MutexLock l(&log_mutex);
|
||
|
for ( int severity = 0; severity < NUM_SEVERITIES; ++severity ) {
|
||
|
log_destination(severity)->fileobject_.SetExtension(ext);
|
||
|
}
|
||
|
}
|
||
|
|
||
|
inline void LogDestination::SetStderrLogging(LogSeverity min_severity) {
|
||
|
assert(min_severity >= 0 && min_severity < NUM_SEVERITIES);
|
||
|
// Prevent any subtle race conditions by wrapping a mutex lock around
|
||
|
// all this stuff.
|
||
|
MutexLock l(&log_mutex);
|
||
|
FLAGS_stderrthreshold = min_severity;
|
||
|
}
|
||
|
|
||
|
inline void LogDestination::LogToStderr() {
|
||
|
// *Don't* put this stuff in a mutex lock, since SetStderrLogging &
|
||
|
// SetLogDestination already do the locking!
|
||
|
SetStderrLogging(0); // thus everything is "also" logged to stderr
|
||
|
for ( int i = 0; i < NUM_SEVERITIES; ++i ) {
|
||
|
SetLogDestination(i, ""); // "" turns off logging to a logfile
|
||
|
}
|
||
|
}
|
||
|
|
||
|
inline void LogDestination::SetEmailLogging(LogSeverity min_severity,
|
||
|
const char* addresses) {
|
||
|
assert(min_severity >= 0 && min_severity < NUM_SEVERITIES);
|
||
|
// Prevent any subtle race conditions by wrapping a mutex lock around
|
||
|
// all this stuff.
|
||
|
MutexLock l(&log_mutex);
|
||
|
LogDestination::email_logging_severity_ = min_severity;
|
||
|
LogDestination::addresses_ = addresses;
|
||
|
}
|
||
|
|
||
|
static void ColoredWriteToStderr(LogSeverity severity,
|
||
|
const char* message, size_t len) {
|
||
|
const GLogColor color =
|
||
|
(LogDestination::terminal_supports_color() && FLAGS_colorlogtostderr) ?
|
||
|
SeverityToColor(severity) : COLOR_DEFAULT;
|
||
|
|
||
|
// Avoid using cerr from this module since we may get called during
|
||
|
// exit code, and cerr may be partially or fully destroyed by then.
|
||
|
if (COLOR_DEFAULT == color) {
|
||
|
fwrite(message, len, 1, stderr);
|
||
|
return;
|
||
|
}
|
||
|
#ifdef OS_WINDOWS
|
||
|
const HANDLE stderr_handle = GetStdHandle(STD_ERROR_HANDLE);
|
||
|
|
||
|
// Gets the current text color.
|
||
|
CONSOLE_SCREEN_BUFFER_INFO buffer_info;
|
||
|
GetConsoleScreenBufferInfo(stderr_handle, &buffer_info);
|
||
|
const WORD old_color_attrs = buffer_info.wAttributes;
|
||
|
|
||
|
// We need to flush the stream buffers into the console before each
|
||
|
// SetConsoleTextAttribute call lest it affect the text that is already
|
||
|
// printed but has not yet reached the console.
|
||
|
fflush(stderr);
|
||
|
SetConsoleTextAttribute(stderr_handle,
|
||
|
GetColorAttribute(color) | FOREGROUND_INTENSITY);
|
||
|
fwrite(message, len, 1, stderr);
|
||
|
fflush(stderr);
|
||
|
// Restores the text color.
|
||
|
SetConsoleTextAttribute(stderr_handle, old_color_attrs);
|
||
|
#else
|
||
|
fprintf(stderr, "\033[0;3%sm", GetAnsiColorCode(color));
|
||
|
fwrite(message, len, 1, stderr);
|
||
|
fprintf(stderr, "\033[m"); // Resets the terminal to default.
|
||
|
#endif // OS_WINDOWS
|
||
|
}
|
||
|
|
||
|
static void WriteToStderr(const char* message, size_t len) {
|
||
|
// Avoid using cerr from this module since we may get called during
|
||
|
// exit code, and cerr may be partially or fully destroyed by then.
|
||
|
fwrite(message, len, 1, stderr);
|
||
|
}
|
||
|
|
||
|
inline void LogDestination::MaybeLogToStderr(LogSeverity severity,
|
||
|
const char* message, size_t len) {
|
||
|
if ((severity >= FLAGS_stderrthreshold) || FLAGS_alsologtostderr) {
|
||
|
ColoredWriteToStderr(severity, message, len);
|
||
|
#ifdef OS_WINDOWS
|
||
|
// On Windows, also output to the debugger
|
||
|
::OutputDebugStringA(string(message,len).c_str());
|
||
|
#endif
|
||
|
}
|
||
|
}
|
||
|
|
||
|
|
||
|
inline void LogDestination::MaybeLogToEmail(LogSeverity severity,
|
||
|
const char* message, size_t len) {
|
||
|
if (severity >= email_logging_severity_ ||
|
||
|
severity >= FLAGS_logemaillevel) {
|
||
|
string to(FLAGS_alsologtoemail);
|
||
|
if (!addresses_.empty()) {
|
||
|
if (!to.empty()) {
|
||
|
to += ",";
|
||
|
}
|
||
|
to += addresses_;
|
||
|
}
|
||
|
const string subject(string("[LOG] ") + LogSeverityNames[severity] + ": " +
|
||
|
glog_internal_namespace_::ProgramInvocationShortName());
|
||
|
string body(hostname());
|
||
|
body += "\n\n";
|
||
|
body.append(message, len);
|
||
|
|
||
|
// should NOT use SendEmail(). The caller of this function holds the
|
||
|
// log_mutex and SendEmail() calls LOG/VLOG which will block trying to
|
||
|
// acquire the log_mutex object. Use SendEmailInternal() and set
|
||
|
// use_logging to false.
|
||
|
SendEmailInternal(to.c_str(), subject.c_str(), body.c_str(), false);
|
||
|
}
|
||
|
}
|
||
|
|
||
|
|
||
|
inline void LogDestination::MaybeLogToLogfile(LogSeverity severity,
|
||
|
time_t timestamp,
|
||
|
const char* message,
|
||
|
size_t len) {
|
||
|
const bool should_flush = severity > FLAGS_logbuflevel;
|
||
|
LogDestination* destination = log_destination(severity);
|
||
|
destination->logger_->Write(should_flush, timestamp, message, len);
|
||
|
}
|
||
|
|
||
|
inline void LogDestination::LogToAllLogfiles(LogSeverity severity,
|
||
|
time_t timestamp,
|
||
|
const char* message,
|
||
|
size_t len) {
|
||
|
|
||
|
if ( FLAGS_logtostderr ) { // global flag: never log to file
|
||
|
ColoredWriteToStderr(severity, message, len);
|
||
|
} else {
|
||
|
for (int i = severity; i >= 0; --i)
|
||
|
LogDestination::MaybeLogToLogfile(i, timestamp, message, len);
|
||
|
}
|
||
|
}
|
||
|
|
||
|
inline void LogDestination::LogToSinks(LogSeverity severity,
|
||
|
const char *full_filename,
|
||
|
const char *base_filename,
|
||
|
int line,
|
||
|
const struct ::tm* tm_time,
|
||
|
const char* message,
|
||
|
size_t message_len) {
|
||
|
ReaderMutexLock l(&sink_mutex_);
|
||
|
if (sinks_) {
|
||
|
for (int i = sinks_->size() - 1; i >= 0; i--) {
|
||
|
(*sinks_)[i]->send(severity, full_filename, base_filename,
|
||
|
line, tm_time, message, message_len);
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
|
||
|
inline void LogDestination::WaitForSinks(LogMessage::LogMessageData* data) {
|
||
|
ReaderMutexLock l(&sink_mutex_);
|
||
|
if (sinks_) {
|
||
|
for (int i = sinks_->size() - 1; i >= 0; i--) {
|
||
|
(*sinks_)[i]->WaitTillSent();
|
||
|
}
|
||
|
}
|
||
|
const bool send_to_sink =
|
||
|
(data->send_method_ == &LogMessage::SendToSink) ||
|
||
|
(data->send_method_ == &LogMessage::SendToSinkAndLog);
|
||
|
if (send_to_sink && data->sink_ != NULL) {
|
||
|
data->sink_->WaitTillSent();
|
||
|
}
|
||
|
}
|
||
|
|
||
|
LogDestination* LogDestination::log_destinations_[NUM_SEVERITIES];
|
||
|
|
||
|
inline LogDestination* LogDestination::log_destination(LogSeverity severity) {
|
||
|
assert(severity >=0 && severity < NUM_SEVERITIES);
|
||
|
if (!log_destinations_[severity]) {
|
||
|
log_destinations_[severity] = new LogDestination(severity, NULL);
|
||
|
}
|
||
|
return log_destinations_[severity];
|
||
|
}
|
||
|
|
||
|
void LogDestination::DeleteLogDestinations() {
|
||
|
for (int severity = 0; severity < NUM_SEVERITIES; ++severity) {
|
||
|
delete log_destinations_[severity];
|
||
|
log_destinations_[severity] = NULL;
|
||
|
}
|
||
|
MutexLock l(&sink_mutex_);
|
||
|
delete sinks_;
|
||
|
sinks_ = NULL;
|
||
|
}
|
||
|
|
||
|
namespace {
|
||
|
|
||
|
LogFileObject::LogFileObject(LogSeverity severity,
|
||
|
const char* base_filename)
|
||
|
: base_filename_selected_(base_filename != NULL),
|
||
|
base_filename_((base_filename != NULL) ? base_filename : ""),
|
||
|
symlink_basename_(glog_internal_namespace_::ProgramInvocationShortName()),
|
||
|
filename_extension_(),
|
||
|
file_(NULL),
|
||
|
severity_(severity),
|
||
|
bytes_since_flush_(0),
|
||
|
file_length_(0),
|
||
|
rollover_attempt_(kRolloverAttemptFrequency-1),
|
||
|
next_flush_time_(0) {
|
||
|
assert(severity >= 0);
|
||
|
assert(severity < NUM_SEVERITIES);
|
||
|
}
|
||
|
|
||
|
LogFileObject::~LogFileObject() {
|
||
|
MutexLock l(&lock_);
|
||
|
if (file_ != NULL) {
|
||
|
fclose(file_);
|
||
|
file_ = NULL;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
void LogFileObject::SetBasename(const char* basename) {
|
||
|
MutexLock l(&lock_);
|
||
|
base_filename_selected_ = true;
|
||
|
if (base_filename_ != basename) {
|
||
|
// Get rid of old log file since we are changing names
|
||
|
if (file_ != NULL) {
|
||
|
fclose(file_);
|
||
|
file_ = NULL;
|
||
|
rollover_attempt_ = kRolloverAttemptFrequency-1;
|
||
|
}
|
||
|
base_filename_ = basename;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
void LogFileObject::SetExtension(const char* ext) {
|
||
|
MutexLock l(&lock_);
|
||
|
if (filename_extension_ != ext) {
|
||
|
// Get rid of old log file since we are changing names
|
||
|
if (file_ != NULL) {
|
||
|
fclose(file_);
|
||
|
file_ = NULL;
|
||
|
rollover_attempt_ = kRolloverAttemptFrequency-1;
|
||
|
}
|
||
|
filename_extension_ = ext;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
void LogFileObject::SetSymlinkBasename(const char* symlink_basename) {
|
||
|
MutexLock l(&lock_);
|
||
|
symlink_basename_ = symlink_basename;
|
||
|
}
|
||
|
|
||
|
void LogFileObject::Flush() {
|
||
|
MutexLock l(&lock_);
|
||
|
FlushUnlocked();
|
||
|
}
|
||
|
|
||
|
void LogFileObject::FlushUnlocked(){
|
||
|
if (file_ != NULL) {
|
||
|
fflush(file_);
|
||
|
bytes_since_flush_ = 0;
|
||
|
}
|
||
|
// Figure out when we are due for another flush.
|
||
|
const int64 next = (FLAGS_logbufsecs
|
||
|
* static_cast<int64>(1000000)); // in usec
|
||
|
next_flush_time_ = CycleClock_Now() + UsecToCycles(next);
|
||
|
}
|
||
|
|
||
|
bool LogFileObject::CreateLogfile(const string& time_pid_string) {
|
||
|
string string_filename = base_filename_+filename_extension_+
|
||
|
time_pid_string;
|
||
|
const char* filename = string_filename.c_str();
|
||
|
int fd = open(filename, O_WRONLY | O_CREAT | O_EXCL, FLAGS_logfile_mode);
|
||
|
if (fd == -1) return false;
|
||
|
#ifdef HAVE_FCNTL
|
||
|
// Mark the file close-on-exec. We don't really care if this fails
|
||
|
fcntl(fd, F_SETFD, FD_CLOEXEC);
|
||
|
#endif
|
||
|
|
||
|
file_ = fdopen(fd, "a"); // Make a FILE*.
|
||
|
if (file_ == NULL) { // Man, we're screwed!
|
||
|
close(fd);
|
||
|
unlink(filename); // Erase the half-baked evidence: an unusable log file
|
||
|
return false;
|
||
|
}
|
||
|
|
||
|
// We try to create a symlink called <program_name>.<severity>,
|
||
|
// which is easier to use. (Every time we create a new logfile,
|
||
|
// we destroy the old symlink and create a new one, so it always
|
||
|
// points to the latest logfile.) If it fails, we're sad but it's
|
||
|
// no error.
|
||
|
if (!symlink_basename_.empty()) {
|
||
|
// take directory from filename
|
||
|
const char* slash = strrchr(filename, PATH_SEPARATOR);
|
||
|
const string linkname =
|
||
|
symlink_basename_ + '.' + LogSeverityNames[severity_];
|
||
|
string linkpath;
|
||
|
if ( slash ) linkpath = string(filename, slash-filename+1); // get dirname
|
||
|
linkpath += linkname;
|
||
|
unlink(linkpath.c_str()); // delete old one if it exists
|
||
|
|
||
|
#if defined(OS_WINDOWS)
|
||
|
// TODO(hamaji): Create lnk file on Windows?
|
||
|
#elif defined(HAVE_UNISTD_H)
|
||
|
// We must have unistd.h.
|
||
|
// Make the symlink be relative (in the same dir) so that if the
|
||
|
// entire log directory gets relocated the link is still valid.
|
||
|
const char *linkdest = slash ? (slash + 1) : filename;
|
||
|
if (symlink(linkdest, linkpath.c_str()) != 0) {
|
||
|
// silently ignore failures
|
||
|
}
|
||
|
|
||
|
// Make an additional link to the log file in a place specified by
|
||
|
// FLAGS_log_link, if indicated
|
||
|
if (!FLAGS_log_link.empty()) {
|
||
|
linkpath = FLAGS_log_link + "/" + linkname;
|
||
|
unlink(linkpath.c_str()); // delete old one if it exists
|
||
|
if (symlink(filename, linkpath.c_str()) != 0) {
|
||
|
// silently ignore failures
|
||
|
}
|
||
|
}
|
||
|
#endif
|
||
|
}
|
||
|
|
||
|
return true; // Everything worked
|
||
|
}
|
||
|
|
||
|
void LogFileObject::Write(bool force_flush,
|
||
|
time_t timestamp,
|
||
|
const char* message,
|
||
|
int message_len) {
|
||
|
MutexLock l(&lock_);
|
||
|
|
||
|
// We don't log if the base_name_ is "" (which means "don't write")
|
||
|
if (base_filename_selected_ && base_filename_.empty()) {
|
||
|
return;
|
||
|
}
|
||
|
|
||
|
if (static_cast<int>(file_length_ >> 20) >= MaxLogSize() ||
|
||
|
PidHasChanged()) {
|
||
|
if (file_ != NULL) fclose(file_);
|
||
|
file_ = NULL;
|
||
|
file_length_ = bytes_since_flush_ = 0;
|
||
|
rollover_attempt_ = kRolloverAttemptFrequency-1;
|
||
|
}
|
||
|
|
||
|
// If there's no destination file, make one before outputting
|
||
|
if (file_ == NULL) {
|
||
|
// Try to rollover the log file every 32 log messages. The only time
|
||
|
// this could matter would be when we have trouble creating the log
|
||
|
// file. If that happens, we'll lose lots of log messages, of course!
|
||
|
if (++rollover_attempt_ != kRolloverAttemptFrequency) return;
|
||
|
rollover_attempt_ = 0;
|
||
|
|
||
|
struct ::tm tm_time;
|
||
|
localtime_r(×tamp, &tm_time);
|
||
|
|
||
|
// The logfile's filename will have the date/time & pid in it
|
||
|
ostringstream time_pid_stream;
|
||
|
time_pid_stream.fill('0');
|
||
|
time_pid_stream << 1900+tm_time.tm_year
|
||
|
<< setw(2) << 1+tm_time.tm_mon
|
||
|
<< setw(2) << tm_time.tm_mday
|
||
|
<< '-'
|
||
|
<< setw(2) << tm_time.tm_hour
|
||
|
<< setw(2) << tm_time.tm_min
|
||
|
<< setw(2) << tm_time.tm_sec
|
||
|
<< '.'
|
||
|
<< GetMainThreadPid();
|
||
|
const string& time_pid_string = time_pid_stream.str();
|
||
|
|
||
|
if (base_filename_selected_) {
|
||
|
if (!CreateLogfile(time_pid_string)) {
|
||
|
perror("Could not create log file");
|
||
|
fprintf(stderr, "COULD NOT CREATE LOGFILE '%s'!\n",
|
||
|
time_pid_string.c_str());
|
||
|
return;
|
||
|
}
|
||
|
} else {
|
||
|
// If no base filename for logs of this severity has been set, use a
|
||
|
// default base filename of
|
||
|
// "<program name>.<hostname>.<user name>.log.<severity level>.". So
|
||
|
// logfiles will have names like
|
||
|
// webserver.examplehost.root.log.INFO.19990817-150000.4354, where
|
||
|
// 19990817 is a date (1999 August 17), 150000 is a time (15:00:00),
|
||
|
// and 4354 is the pid of the logging process. The date & time reflect
|
||
|
// when the file was created for output.
|
||
|
//
|
||
|
// Where does the file get put? Successively try the directories
|
||
|
// "/tmp", and "."
|
||
|
string stripped_filename(
|
||
|
glog_internal_namespace_::ProgramInvocationShortName());
|
||
|
string hostname;
|
||
|
GetHostName(&hostname);
|
||
|
|
||
|
string uidname = MyUserName();
|
||
|
// We should not call CHECK() here because this function can be
|
||
|
// called after holding on to log_mutex. We don't want to
|
||
|
// attempt to hold on to the same mutex, and get into a
|
||
|
// deadlock. Simply use a name like invalid-user.
|
||
|
if (uidname.empty()) uidname = "invalid-user";
|
||
|
|
||
|
stripped_filename = stripped_filename+'.'+hostname+'.'
|
||
|
+uidname+".log."
|
||
|
+LogSeverityNames[severity_]+'.';
|
||
|
// We're going to (potentially) try to put logs in several different dirs
|
||
|
const vector<string> & log_dirs = GetLoggingDirectories();
|
||
|
|
||
|
// Go through the list of dirs, and try to create the log file in each
|
||
|
// until we succeed or run out of options
|
||
|
bool success = false;
|
||
|
for (vector<string>::const_iterator dir = log_dirs.begin();
|
||
|
dir != log_dirs.end();
|
||
|
++dir) {
|
||
|
base_filename_ = *dir + "/" + stripped_filename;
|
||
|
if ( CreateLogfile(time_pid_string) ) {
|
||
|
success = true;
|
||
|
break;
|
||
|
}
|
||
|
}
|
||
|
// If we never succeeded, we have to give up
|
||
|
if ( success == false ) {
|
||
|
perror("Could not create logging file");
|
||
|
fprintf(stderr, "COULD NOT CREATE A LOGGINGFILE %s!",
|
||
|
time_pid_string.c_str());
|
||
|
return;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
// Write a header message into the log file
|
||
|
ostringstream file_header_stream;
|
||
|
file_header_stream.fill('0');
|
||
|
file_header_stream << "Log file created at: "
|
||
|
<< 1900+tm_time.tm_year << '/'
|
||
|
<< setw(2) << 1+tm_time.tm_mon << '/'
|
||
|
<< setw(2) << tm_time.tm_mday
|
||
|
<< ' '
|
||
|
<< setw(2) << tm_time.tm_hour << ':'
|
||
|
<< setw(2) << tm_time.tm_min << ':'
|
||
|
<< setw(2) << tm_time.tm_sec << '\n'
|
||
|
<< "Running on machine: "
|
||
|
<< LogDestination::hostname() << '\n'
|
||
|
<< "Log line format: [IWEF]mmdd hh:mm:ss.uuuuuu "
|
||
|
<< "threadid file:line] msg" << '\n';
|
||
|
const string& file_header_string = file_header_stream.str();
|
||
|
|
||
|
const int header_len = file_header_string.size();
|
||
|
fwrite(file_header_string.data(), 1, header_len, file_);
|
||
|
file_length_ += header_len;
|
||
|
bytes_since_flush_ += header_len;
|
||
|
}
|
||
|
|
||
|
// Write to LOG file
|
||
|
if ( !stop_writing ) {
|
||
|
// fwrite() doesn't return an error when the disk is full, for
|
||
|
// messages that are less than 4096 bytes. When the disk is full,
|
||
|
// it returns the message length for messages that are less than
|
||
|
// 4096 bytes. fwrite() returns 4096 for message lengths that are
|
||
|
// greater than 4096, thereby indicating an error.
|
||
|
errno = 0;
|
||
|
fwrite(message, 1, message_len, file_);
|
||
|
if ( FLAGS_stop_logging_if_full_disk &&
|
||
|
errno == ENOSPC ) { // disk full, stop writing to disk
|
||
|
stop_writing = true; // until the disk is
|
||
|
return;
|
||
|
} else {
|
||
|
file_length_ += message_len;
|
||
|
bytes_since_flush_ += message_len;
|
||
|
}
|
||
|
} else {
|
||
|
if ( CycleClock_Now() >= next_flush_time_ )
|
||
|
stop_writing = false; // check to see if disk has free space.
|
||
|
return; // no need to flush
|
||
|
}
|
||
|
|
||
|
// See important msgs *now*. Also, flush logs at least every 10^6 chars,
|
||
|
// or every "FLAGS_logbufsecs" seconds.
|
||
|
if ( force_flush ||
|
||
|
(bytes_since_flush_ >= 1000000) ||
|
||
|
(CycleClock_Now() >= next_flush_time_) ) {
|
||
|
FlushUnlocked();
|
||
|
#ifdef OS_LINUX
|
||
|
if (FLAGS_drop_log_memory) {
|
||
|
if (file_length_ >= logging::kPageSize) {
|
||
|
// don't evict the most recent page
|
||
|
uint32 len = file_length_ & ~(logging::kPageSize - 1);
|
||
|
posix_fadvise(fileno(file_), 0, len, POSIX_FADV_DONTNEED);
|
||
|
}
|
||
|
}
|
||
|
#endif
|
||
|
}
|
||
|
}
|
||
|
|
||
|
} // namespace
|
||
|
|
||
|
|
||
|
// Static log data space to avoid alloc failures in a LOG(FATAL)
|
||
|
//
|
||
|
// Since multiple threads may call LOG(FATAL), and we want to preserve
|
||
|
// the data from the first call, we allocate two sets of space. One
|
||
|
// for exclusive use by the first thread, and one for shared use by
|
||
|
// all other threads.
|
||
|
static Mutex fatal_msg_lock;
|
||
|
static CrashReason crash_reason;
|
||
|
static bool fatal_msg_exclusive = true;
|
||
|
static LogMessage::LogMessageData fatal_msg_data_exclusive;
|
||
|
static LogMessage::LogMessageData fatal_msg_data_shared;
|
||
|
|
||
|
LogMessage::LogMessageData::LogMessageData()
|
||
|
: stream_(message_text_, LogMessage::kMaxLogMessageLen, 0) {
|
||
|
}
|
||
|
|
||
|
LogMessage::LogMessage(const char* file, int line, LogSeverity severity,
|
||
|
int ctr, void (LogMessage::*send_method)())
|
||
|
: allocated_(NULL) {
|
||
|
Init(file, line, severity, send_method);
|
||
|
data_->stream_.set_ctr(ctr);
|
||
|
}
|
||
|
|
||
|
LogMessage::LogMessage(const char* file, int line,
|
||
|
const CheckOpString& result)
|
||
|
: allocated_(NULL) {
|
||
|
Init(file, line, GLOG_FATAL, &LogMessage::SendToLog);
|
||
|
stream() << "Check failed: " << (*result.str_) << " ";
|
||
|
}
|
||
|
|
||
|
LogMessage::LogMessage(const char* file, int line)
|
||
|
: allocated_(NULL) {
|
||
|
Init(file, line, GLOG_INFO, &LogMessage::SendToLog);
|
||
|
}
|
||
|
|
||
|
LogMessage::LogMessage(const char* file, int line, LogSeverity severity)
|
||
|
: allocated_(NULL) {
|
||
|
Init(file, line, severity, &LogMessage::SendToLog);
|
||
|
}
|
||
|
|
||
|
LogMessage::LogMessage(const char* file, int line, LogSeverity severity,
|
||
|
LogSink* sink, bool also_send_to_log)
|
||
|
: allocated_(NULL) {
|
||
|
Init(file, line, severity, also_send_to_log ? &LogMessage::SendToSinkAndLog :
|
||
|
&LogMessage::SendToSink);
|
||
|
data_->sink_ = sink; // override Init()'s setting to NULL
|
||
|
}
|
||
|
|
||
|
LogMessage::LogMessage(const char* file, int line, LogSeverity severity,
|
||
|
vector<string> *outvec)
|
||
|
: allocated_(NULL) {
|
||
|
Init(file, line, severity, &LogMessage::SaveOrSendToLog);
|
||
|
data_->outvec_ = outvec; // override Init()'s setting to NULL
|
||
|
}
|
||
|
|
||
|
LogMessage::LogMessage(const char* file, int line, LogSeverity severity,
|
||
|
string *message)
|
||
|
: allocated_(NULL) {
|
||
|
Init(file, line, severity, &LogMessage::WriteToStringAndLog);
|
||
|
data_->message_ = message; // override Init()'s setting to NULL
|
||
|
}
|
||
|
|
||
|
void LogMessage::Init(const char* file,
|
||
|
int line,
|
||
|
LogSeverity severity,
|
||
|
void (LogMessage::*send_method)()) {
|
||
|
allocated_ = NULL;
|
||
|
if (severity != GLOG_FATAL || !exit_on_dfatal) {
|
||
|
allocated_ = new LogMessageData();
|
||
|
data_ = allocated_;
|
||
|
data_->first_fatal_ = false;
|
||
|
} else {
|
||
|
MutexLock l(&fatal_msg_lock);
|
||
|
if (fatal_msg_exclusive) {
|
||
|
fatal_msg_exclusive = false;
|
||
|
data_ = &fatal_msg_data_exclusive;
|
||
|
data_->first_fatal_ = true;
|
||
|
} else {
|
||
|
data_ = &fatal_msg_data_shared;
|
||
|
data_->first_fatal_ = false;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
stream().fill('0');
|
||
|
data_->preserved_errno_ = errno;
|
||
|
data_->severity_ = severity;
|
||
|
data_->line_ = line;
|
||
|
data_->send_method_ = send_method;
|
||
|
data_->sink_ = NULL;
|
||
|
data_->outvec_ = NULL;
|
||
|
WallTime now = WallTime_Now();
|
||
|
data_->timestamp_ = static_cast<time_t>(now);
|
||
|
localtime_r(&data_->timestamp_, &data_->tm_time_);
|
||
|
int usecs = static_cast<int>((now - data_->timestamp_) * 1000000);
|
||
|
RawLog__SetLastTime(data_->tm_time_, usecs);
|
||
|
|
||
|
data_->num_chars_to_log_ = 0;
|
||
|
data_->num_chars_to_syslog_ = 0;
|
||
|
data_->basename_ = const_basename(file);
|
||
|
data_->fullname_ = file;
|
||
|
data_->has_been_flushed_ = false;
|
||
|
|
||
|
// If specified, prepend a prefix to each line. For example:
|
||
|
// I1018 160715 f5d4fbb0 logging.cc:1153]
|
||
|
// (log level, GMT month, date, time, thread_id, file basename, line)
|
||
|
// We exclude the thread_id for the default thread.
|
||
|
if (FLAGS_log_prefix && (line != kNoLogPrefix)) {
|
||
|
stream() << LogSeverityNames[severity][0]
|
||
|
<< setw(2) << 1+data_->tm_time_.tm_mon
|
||
|
<< setw(2) << data_->tm_time_.tm_mday
|
||
|
<< ' '
|
||
|
<< setw(2) << data_->tm_time_.tm_hour << ':'
|
||
|
<< setw(2) << data_->tm_time_.tm_min << ':'
|
||
|
<< setw(2) << data_->tm_time_.tm_sec << "."
|
||
|
<< setw(6) << usecs
|
||
|
<< ' '
|
||
|
<< setfill(' ') << setw(5)
|
||
|
<< static_cast<unsigned int>(GetTID()) << setfill('0')
|
||
|
<< ' '
|
||
|
<< data_->basename_ << ':' << data_->line_ << "] ";
|
||
|
}
|
||
|
data_->num_prefix_chars_ = data_->stream_.pcount();
|
||
|
|
||
|
if (!FLAGS_log_backtrace_at.empty()) {
|
||
|
char fileline[128];
|
||
|
snprintf(fileline, sizeof(fileline), "%s:%d", data_->basename_, line);
|
||
|
#ifdef HAVE_STACKTRACE
|
||
|
if (!strcmp(FLAGS_log_backtrace_at.c_str(), fileline)) {
|
||
|
string stacktrace;
|
||
|
DumpStackTraceToString(&stacktrace);
|
||
|
stream() << " (stacktrace:\n" << stacktrace << ") ";
|
||
|
}
|
||
|
#endif
|
||
|
}
|
||
|
}
|
||
|
|
||
|
LogMessage::~LogMessage() {
|
||
|
Flush();
|
||
|
delete allocated_;
|
||
|
}
|
||
|
|
||
|
int LogMessage::preserved_errno() const {
|
||
|
return data_->preserved_errno_;
|
||
|
}
|
||
|
|
||
|
ostream& LogMessage::stream() {
|
||
|
return data_->stream_;
|
||
|
}
|
||
|
|
||
|
// Flush buffered message, called by the destructor, or any other function
|
||
|
// that needs to synchronize the log.
|
||
|
void LogMessage::Flush() {
|
||
|
if (data_->has_been_flushed_ || data_->severity_ < FLAGS_minloglevel)
|
||
|
return;
|
||
|
|
||
|
data_->num_chars_to_log_ = data_->stream_.pcount();
|
||
|
data_->num_chars_to_syslog_ =
|
||
|
data_->num_chars_to_log_ - data_->num_prefix_chars_;
|
||
|
|
||
|
// Do we need to add a \n to the end of this message?
|
||
|
bool append_newline =
|
||
|
(data_->message_text_[data_->num_chars_to_log_-1] != '\n');
|
||
|
char original_final_char = '\0';
|
||
|
|
||
|
// If we do need to add a \n, we'll do it by violating the memory of the
|
||
|
// ostrstream buffer. This is quick, and we'll make sure to undo our
|
||
|
// modification before anything else is done with the ostrstream. It
|
||
|
// would be preferable not to do things this way, but it seems to be
|
||
|
// the best way to deal with this.
|
||
|
if (append_newline) {
|
||
|
original_final_char = data_->message_text_[data_->num_chars_to_log_];
|
||
|
data_->message_text_[data_->num_chars_to_log_++] = '\n';
|
||
|
}
|
||
|
|
||
|
// Prevent any subtle race conditions by wrapping a mutex lock around
|
||
|
// the actual logging action per se.
|
||
|
{
|
||
|
MutexLock l(&log_mutex);
|
||
|
(this->*(data_->send_method_))();
|
||
|
++num_messages_[static_cast<int>(data_->severity_)];
|
||
|
}
|
||
|
LogDestination::WaitForSinks(data_);
|
||
|
|
||
|
if (append_newline) {
|
||
|
// Fix the ostrstream back how it was before we screwed with it.
|
||
|
// It's 99.44% certain that we don't need to worry about doing this.
|
||
|
data_->message_text_[data_->num_chars_to_log_-1] = original_final_char;
|
||
|
}
|
||
|
|
||
|
// If errno was already set before we enter the logging call, we'll
|
||
|
// set it back to that value when we return from the logging call.
|
||
|
// It happens often that we log an error message after a syscall
|
||
|
// failure, which can potentially set the errno to some other
|
||
|
// values. We would like to preserve the original errno.
|
||
|
if (data_->preserved_errno_ != 0) {
|
||
|
errno = data_->preserved_errno_;
|
||
|
}
|
||
|
|
||
|
// Note that this message is now safely logged. If we're asked to flush
|
||
|
// again, as a result of destruction, say, we'll do nothing on future calls.
|
||
|
data_->has_been_flushed_ = true;
|
||
|
}
|
||
|
|
||
|
// Copy of first FATAL log message so that we can print it out again
|
||
|
// after all the stack traces. To preserve legacy behavior, we don't
|
||
|
// use fatal_msg_data_exclusive.
|
||
|
static time_t fatal_time;
|
||
|
static char fatal_message[256];
|
||
|
|
||
|
void ReprintFatalMessage() {
|
||
|
if (fatal_message[0]) {
|
||
|
const int n = strlen(fatal_message);
|
||
|
if (!FLAGS_logtostderr) {
|
||
|
// Also write to stderr (don't color to avoid terminal checks)
|
||
|
WriteToStderr(fatal_message, n);
|
||
|
}
|
||
|
LogDestination::LogToAllLogfiles(GLOG_ERROR, fatal_time, fatal_message, n);
|
||
|
}
|
||
|
}
|
||
|
|
||
|
// L >= log_mutex (callers must hold the log_mutex).
|
||
|
void LogMessage::SendToLog() EXCLUSIVE_LOCKS_REQUIRED(log_mutex) {
|
||
|
static bool already_warned_before_initgoogle = false;
|
||
|
|
||
|
log_mutex.AssertHeld();
|
||
|
|
||
|
RAW_DCHECK(data_->num_chars_to_log_ > 0 &&
|
||
|
data_->message_text_[data_->num_chars_to_log_-1] == '\n', "");
|
||
|
|
||
|
// Messages of a given severity get logged to lower severity logs, too
|
||
|
|
||
|
if (!already_warned_before_initgoogle && !IsGoogleLoggingInitialized()) {
|
||
|
const char w[] = "WARNING: Logging before InitGoogleLogging() is "
|
||
|
"written to STDERR\n";
|
||
|
WriteToStderr(w, strlen(w));
|
||
|
already_warned_before_initgoogle = true;
|
||
|
}
|
||
|
|
||
|
// global flag: never log to file if set. Also -- don't log to a
|
||
|
// file if we haven't parsed the command line flags to get the
|
||
|
// program name.
|
||
|
if (FLAGS_logtostderr || !IsGoogleLoggingInitialized()) {
|
||
|
ColoredWriteToStderr(data_->severity_,
|
||
|
data_->message_text_, data_->num_chars_to_log_);
|
||
|
|
||
|
// this could be protected by a flag if necessary.
|
||
|
LogDestination::LogToSinks(data_->severity_,
|
||
|
data_->fullname_, data_->basename_,
|
||
|
data_->line_, &data_->tm_time_,
|
||
|
data_->message_text_ + data_->num_prefix_chars_,
|
||
|
(data_->num_chars_to_log_ -
|
||
|
data_->num_prefix_chars_ - 1));
|
||
|
} else {
|
||
|
|
||
|
// log this message to all log files of severity <= severity_
|
||
|
LogDestination::LogToAllLogfiles(data_->severity_, data_->timestamp_,
|
||
|
data_->message_text_,
|
||
|
data_->num_chars_to_log_);
|
||
|
|
||
|
LogDestination::MaybeLogToStderr(data_->severity_, data_->message_text_,
|
||
|
data_->num_chars_to_log_);
|
||
|
LogDestination::MaybeLogToEmail(data_->severity_, data_->message_text_,
|
||
|
data_->num_chars_to_log_);
|
||
|
LogDestination::LogToSinks(data_->severity_,
|
||
|
data_->fullname_, data_->basename_,
|
||
|
data_->line_, &data_->tm_time_,
|
||
|
data_->message_text_ + data_->num_prefix_chars_,
|
||
|
(data_->num_chars_to_log_
|
||
|
- data_->num_prefix_chars_ - 1));
|
||
|
// NOTE: -1 removes trailing \n
|
||
|
}
|
||
|
|
||
|
// If we log a FATAL message, flush all the log destinations, then toss
|
||
|
// a signal for others to catch. We leave the logs in a state that
|
||
|
// someone else can use them (as long as they flush afterwards)
|
||
|
if (data_->severity_ == GLOG_FATAL && exit_on_dfatal) {
|
||
|
if (data_->first_fatal_) {
|
||
|
// Store crash information so that it is accessible from within signal
|
||
|
// handlers that may be invoked later.
|
||
|
RecordCrashReason(&crash_reason);
|
||
|
SetCrashReason(&crash_reason);
|
||
|
|
||
|
// Store shortened fatal message for other logs and GWQ status
|
||
|
const int copy = min<int>(data_->num_chars_to_log_,
|
||
|
sizeof(fatal_message)-1);
|
||
|
memcpy(fatal_message, data_->message_text_, copy);
|
||
|
fatal_message[copy] = '\0';
|
||
|
fatal_time = data_->timestamp_;
|
||
|
}
|
||
|
|
||
|
if (!FLAGS_logtostderr) {
|
||
|
for (int i = 0; i < NUM_SEVERITIES; ++i) {
|
||
|
if ( LogDestination::log_destinations_[i] )
|
||
|
LogDestination::log_destinations_[i]->logger_->Write(true, 0, "", 0);
|
||
|
}
|
||
|
}
|
||
|
|
||
|
// release the lock that our caller (directly or indirectly)
|
||
|
// LogMessage::~LogMessage() grabbed so that signal handlers
|
||
|
// can use the logging facility. Alternately, we could add
|
||
|
// an entire unsafe logging interface to bypass locking
|
||
|
// for signal handlers but this seems simpler.
|
||
|
log_mutex.Unlock();
|
||
|
LogDestination::WaitForSinks(data_);
|
||
|
|
||
|
const char* message = "*** Check failure stack trace: ***\n";
|
||
|
if (write(STDERR_FILENO, message, strlen(message)) < 0) {
|
||
|
// Ignore errors.
|
||
|
}
|
||
|
Fail();
|
||
|
}
|
||
|
}
|
||
|
|
||
|
void LogMessage::RecordCrashReason(
|
||
|
glog_internal_namespace_::CrashReason* reason) {
|
||
|
reason->filename = fatal_msg_data_exclusive.fullname_;
|
||
|
reason->line_number = fatal_msg_data_exclusive.line_;
|
||
|
reason->message = fatal_msg_data_exclusive.message_text_ +
|
||
|
fatal_msg_data_exclusive.num_prefix_chars_;
|
||
|
#ifdef HAVE_STACKTRACE
|
||
|
// Retrieve the stack trace, omitting the logging frames that got us here.
|
||
|
reason->depth = GetStackTrace(reason->stack, ARRAYSIZE(reason->stack), 4);
|
||
|
#else
|
||
|
reason->depth = 0;
|
||
|
#endif
|
||
|
}
|
||
|
|
||
|
#ifdef HAVE___ATTRIBUTE__
|
||
|
# define ATTRIBUTE_NORETURN __attribute__((noreturn))
|
||
|
#else
|
||
|
# define ATTRIBUTE_NORETURN
|
||
|
#endif
|
||
|
|
||
|
static void logging_fail() ATTRIBUTE_NORETURN;
|
||
|
|
||
|
static void logging_fail() {
|
||
|
#if defined(_DEBUG) && defined(_MSC_VER)
|
||
|
// When debugging on windows, avoid the obnoxious dialog and make
|
||
|
// it possible to continue past a LOG(FATAL) in the debugger
|
||
|
__debugbreak();
|
||
|
#else
|
||
|
abort();
|
||
|
#endif
|
||
|
}
|
||
|
|
||
|
typedef void (*logging_fail_func_t)() ATTRIBUTE_NORETURN;
|
||
|
|
||
|
GOOGLE_GLOG_DLL_DECL
|
||
|
logging_fail_func_t g_logging_fail_func = &logging_fail;
|
||
|
|
||
|
void InstallFailureFunction(void (*fail_func)()) {
|
||
|
g_logging_fail_func = (logging_fail_func_t)fail_func;
|
||
|
}
|
||
|
|
||
|
void LogMessage::Fail() {
|
||
|
g_logging_fail_func();
|
||
|
}
|
||
|
|
||
|
// L >= log_mutex (callers must hold the log_mutex).
|
||
|
void LogMessage::SendToSink() EXCLUSIVE_LOCKS_REQUIRED(log_mutex) {
|
||
|
if (data_->sink_ != NULL) {
|
||
|
RAW_DCHECK(data_->num_chars_to_log_ > 0 &&
|
||
|
data_->message_text_[data_->num_chars_to_log_-1] == '\n', "");
|
||
|
data_->sink_->send(data_->severity_, data_->fullname_, data_->basename_,
|
||
|
data_->line_, &data_->tm_time_,
|
||
|
data_->message_text_ + data_->num_prefix_chars_,
|
||
|
(data_->num_chars_to_log_ -
|
||
|
data_->num_prefix_chars_ - 1));
|
||
|
}
|
||
|
}
|
||
|
|
||
|
// L >= log_mutex (callers must hold the log_mutex).
|
||
|
void LogMessage::SendToSinkAndLog() EXCLUSIVE_LOCKS_REQUIRED(log_mutex) {
|
||
|
SendToSink();
|
||
|
SendToLog();
|
||
|
}
|
||
|
|
||
|
// L >= log_mutex (callers must hold the log_mutex).
|
||
|
void LogMessage::SaveOrSendToLog() EXCLUSIVE_LOCKS_REQUIRED(log_mutex) {
|
||
|
if (data_->outvec_ != NULL) {
|
||
|
RAW_DCHECK(data_->num_chars_to_log_ > 0 &&
|
||
|
data_->message_text_[data_->num_chars_to_log_-1] == '\n', "");
|
||
|
// Omit prefix of message and trailing newline when recording in outvec_.
|
||
|
const char *start = data_->message_text_ + data_->num_prefix_chars_;
|
||
|
int len = data_->num_chars_to_log_ - data_->num_prefix_chars_ - 1;
|
||
|
data_->outvec_->push_back(string(start, len));
|
||
|
} else {
|
||
|
SendToLog();
|
||
|
}
|
||
|
}
|
||
|
|
||
|
void LogMessage::WriteToStringAndLog() EXCLUSIVE_LOCKS_REQUIRED(log_mutex) {
|
||
|
if (data_->message_ != NULL) {
|
||
|
RAW_DCHECK(data_->num_chars_to_log_ > 0 &&
|
||
|
data_->message_text_[data_->num_chars_to_log_-1] == '\n', "");
|
||
|
// Omit prefix of message and trailing newline when writing to message_.
|
||
|
const char *start = data_->message_text_ + data_->num_prefix_chars_;
|
||
|
int len = data_->num_chars_to_log_ - data_->num_prefix_chars_ - 1;
|
||
|
data_->message_->assign(start, len);
|
||
|
}
|
||
|
SendToLog();
|
||
|
}
|
||
|
|
||
|
// L >= log_mutex (callers must hold the log_mutex).
|
||
|
void LogMessage::SendToSyslogAndLog() {
|
||
|
#ifdef HAVE_SYSLOG_H
|
||
|
// Before any calls to syslog(), make a single call to openlog()
|
||
|
static bool openlog_already_called = false;
|
||
|
if (!openlog_already_called) {
|
||
|
openlog(glog_internal_namespace_::ProgramInvocationShortName(),
|
||
|
LOG_CONS | LOG_NDELAY | LOG_PID,
|
||
|
LOG_USER);
|
||
|
openlog_already_called = true;
|
||
|
}
|
||
|
|
||
|
// This array maps Google severity levels to syslog levels
|
||
|
const int SEVERITY_TO_LEVEL[] = { LOG_INFO, LOG_WARNING, LOG_ERR, LOG_EMERG };
|
||
|
syslog(LOG_USER | SEVERITY_TO_LEVEL[static_cast<int>(data_->severity_)], "%.*s",
|
||
|
int(data_->num_chars_to_syslog_),
|
||
|
data_->message_text_ + data_->num_prefix_chars_);
|
||
|
SendToLog();
|
||
|
#else
|
||
|
LOG(ERROR) << "No syslog support: message=" << data_->message_text_;
|
||
|
#endif
|
||
|
}
|
||
|
|
||
|
base::Logger* base::GetLogger(LogSeverity severity) {
|
||
|
MutexLock l(&log_mutex);
|
||
|
return LogDestination::log_destination(severity)->logger_;
|
||
|
}
|
||
|
|
||
|
void base::SetLogger(LogSeverity severity, base::Logger* logger) {
|
||
|
MutexLock l(&log_mutex);
|
||
|
LogDestination::log_destination(severity)->logger_ = logger;
|
||
|
}
|
||
|
|
||
|
// L < log_mutex. Acquires and releases mutex_.
|
||
|
int64 LogMessage::num_messages(int severity) {
|
||
|
MutexLock l(&log_mutex);
|
||
|
return num_messages_[severity];
|
||
|
}
|
||
|
|
||
|
// Output the COUNTER value. This is only valid if ostream is a
|
||
|
// LogStream.
|
||
|
ostream& operator<<(ostream &os, const PRIVATE_Counter&) {
|
||
|
#ifdef DISABLE_RTTI
|
||
|
LogMessage::LogStream *log = static_cast<LogMessage::LogStream*>(&os);
|
||
|
#else
|
||
|
LogMessage::LogStream *log = dynamic_cast<LogMessage::LogStream*>(&os);
|
||
|
#endif
|
||
|
CHECK(log && log == log->self())
|
||
|
<< "You must not use COUNTER with non-glog ostream";
|
||
|
os << log->ctr();
|
||
|
return os;
|
||
|
}
|
||
|
|
||
|
ErrnoLogMessage::ErrnoLogMessage(const char* file, int line,
|
||
|
LogSeverity severity, int ctr,
|
||
|
void (LogMessage::*send_method)())
|
||
|
: LogMessage(file, line, severity, ctr, send_method) {
|
||
|
}
|
||
|
|
||
|
ErrnoLogMessage::~ErrnoLogMessage() {
|
||
|
// Don't access errno directly because it may have been altered
|
||
|
// while streaming the message.
|
||
|
stream() << ": " << StrError(preserved_errno()) << " ["
|
||
|
<< preserved_errno() << "]";
|
||
|
}
|
||
|
|
||
|
void FlushLogFiles(LogSeverity min_severity) {
|
||
|
LogDestination::FlushLogFiles(min_severity);
|
||
|
}
|
||
|
|
||
|
void FlushLogFilesUnsafe(LogSeverity min_severity) {
|
||
|
LogDestination::FlushLogFilesUnsafe(min_severity);
|
||
|
}
|
||
|
|
||
|
void SetLogDestination(LogSeverity severity, const char* base_filename) {
|
||
|
LogDestination::SetLogDestination(severity, base_filename);
|
||
|
}
|
||
|
|
||
|
void SetLogSymlink(LogSeverity severity, const char* symlink_basename) {
|
||
|
LogDestination::SetLogSymlink(severity, symlink_basename);
|
||
|
}
|
||
|
|
||
|
LogSink::~LogSink() {
|
||
|
}
|
||
|
|
||
|
void LogSink::WaitTillSent() {
|
||
|
// noop default
|
||
|
}
|
||
|
|
||
|
string LogSink::ToString(LogSeverity severity, const char* file, int line,
|
||
|
const struct ::tm* tm_time,
|
||
|
const char* message, size_t message_len) {
|
||
|
ostringstream stream(string(message, message_len));
|
||
|
stream.fill('0');
|
||
|
|
||
|
// FIXME(jrvb): Updating this to use the correct value for usecs
|
||
|
// requires changing the signature for both this method and
|
||
|
// LogSink::send(). This change needs to be done in a separate CL
|
||
|
// so subclasses of LogSink can be updated at the same time.
|
||
|
int usecs = 0;
|
||
|
|
||
|
stream << LogSeverityNames[severity][0]
|
||
|
<< setw(2) << 1+tm_time->tm_mon
|
||
|
<< setw(2) << tm_time->tm_mday
|
||
|
<< ' '
|
||
|
<< setw(2) << tm_time->tm_hour << ':'
|
||
|
<< setw(2) << tm_time->tm_min << ':'
|
||
|
<< setw(2) << tm_time->tm_sec << '.'
|
||
|
<< setw(6) << usecs
|
||
|
<< ' '
|
||
|
<< setfill(' ') << setw(5) << GetTID() << setfill('0')
|
||
|
<< ' '
|
||
|
<< file << ':' << line << "] ";
|
||
|
|
||
|
stream << string(message, message_len);
|
||
|
return stream.str();
|
||
|
}
|
||
|
|
||
|
void AddLogSink(LogSink *destination) {
|
||
|
LogDestination::AddLogSink(destination);
|
||
|
}
|
||
|
|
||
|
void RemoveLogSink(LogSink *destination) {
|
||
|
LogDestination::RemoveLogSink(destination);
|
||
|
}
|
||
|
|
||
|
void SetLogFilenameExtension(const char* ext) {
|
||
|
LogDestination::SetLogFilenameExtension(ext);
|
||
|
}
|
||
|
|
||
|
void SetStderrLogging(LogSeverity min_severity) {
|
||
|
LogDestination::SetStderrLogging(min_severity);
|
||
|
}
|
||
|
|
||
|
void SetEmailLogging(LogSeverity min_severity, const char* addresses) {
|
||
|
LogDestination::SetEmailLogging(min_severity, addresses);
|
||
|
}
|
||
|
|
||
|
void LogToStderr() {
|
||
|
LogDestination::LogToStderr();
|
||
|
}
|
||
|
|
||
|
namespace base {
|
||
|
namespace internal {
|
||
|
|
||
|
bool GetExitOnDFatal() {
|
||
|
MutexLock l(&log_mutex);
|
||
|
return exit_on_dfatal;
|
||
|
}
|
||
|
|
||
|
// Determines whether we exit the program for a LOG(DFATAL) message in
|
||
|
// debug mode. It does this by skipping the call to Fail/FailQuietly.
|
||
|
// This is intended for testing only.
|
||
|
//
|
||
|
// This can have some effects on LOG(FATAL) as well. Failure messages
|
||
|
// are always allocated (rather than sharing a buffer), the crash
|
||
|
// reason is not recorded, the "gwq" status message is not updated,
|
||
|
// and the stack trace is not recorded. The LOG(FATAL) *will* still
|
||
|
// exit the program. Since this function is used only in testing,
|
||
|
// these differences are acceptable.
|
||
|
void SetExitOnDFatal(bool value) {
|
||
|
MutexLock l(&log_mutex);
|
||
|
exit_on_dfatal = value;
|
||
|
}
|
||
|
|
||
|
} // namespace internal
|
||
|
} // namespace base
|
||
|
|
||
|
// use_logging controls whether the logging functions LOG/VLOG are used
|
||
|
// to log errors. It should be set to false when the caller holds the
|
||
|
// log_mutex.
|
||
|
static bool SendEmailInternal(const char*dest, const char *subject,
|
||
|
const char*body, bool use_logging) {
|
||
|
if (dest && *dest) {
|
||
|
if ( use_logging ) {
|
||
|
VLOG(1) << "Trying to send TITLE:" << subject
|
||
|
<< " BODY:" << body << " to " << dest;
|
||
|
} else {
|
||
|
fprintf(stderr, "Trying to send TITLE: %s BODY: %s to %s\n",
|
||
|
subject, body, dest);
|
||
|
}
|
||
|
|
||
|
string cmd =
|
||
|
FLAGS_logmailer + " -s\"" + subject + "\" " + dest;
|
||
|
FILE* pipe = popen(cmd.c_str(), "w");
|
||
|
if (pipe != NULL) {
|
||
|
// Add the body if we have one
|
||
|
if (body)
|
||
|
fwrite(body, sizeof(char), strlen(body), pipe);
|
||
|
bool ok = pclose(pipe) != -1;
|
||
|
if ( !ok ) {
|
||
|
if ( use_logging ) {
|
||
|
LOG(ERROR) << "Problems sending mail to " << dest << ": "
|
||
|
<< StrError(errno);
|
||
|
} else {
|
||
|
fprintf(stderr, "Problems sending mail to %s: %s\n",
|
||
|
dest, StrError(errno).c_str());
|
||
|
}
|
||
|
}
|
||
|
return ok;
|
||
|
} else {
|
||
|
if ( use_logging ) {
|
||
|
LOG(ERROR) << "Unable to send mail to " << dest;
|
||
|
} else {
|
||
|
fprintf(stderr, "Unable to send mail to %s\n", dest);
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
return false;
|
||
|
}
|
||
|
|
||
|
bool SendEmail(const char*dest, const char *subject, const char*body){
|
||
|
return SendEmailInternal(dest, subject, body, true);
|
||
|
}
|
||
|
|
||
|
static void GetTempDirectories(vector<string>* list) {
|
||
|
list->clear();
|
||
|
#ifdef OS_WINDOWS
|
||
|
// On windows we'll try to find a directory in this order:
|
||
|
// C:/Documents & Settings/whomever/TEMP (or whatever GetTempPath() is)
|
||
|
// C:/TMP/
|
||
|
// C:/TEMP/
|
||
|
// C:/WINDOWS/ or C:/WINNT/
|
||
|
// .
|
||
|
char tmp[MAX_PATH];
|
||
|
if (GetTempPathA(MAX_PATH, tmp))
|
||
|
list->push_back(tmp);
|
||
|
list->push_back("C:\\tmp\\");
|
||
|
list->push_back("C:\\temp\\");
|
||
|
#else
|
||
|
// Directories, in order of preference. If we find a dir that
|
||
|
// exists, we stop adding other less-preferred dirs
|
||
|
const char * candidates[] = {
|
||
|
// Non-null only during unittest/regtest
|
||
|
getenv("TEST_TMPDIR"),
|
||
|
|
||
|
// Explicitly-supplied temp dirs
|
||
|
getenv("TMPDIR"), getenv("TMP"),
|
||
|
|
||
|
// If all else fails
|
||
|
"/tmp",
|
||
|
};
|
||
|
|
||
|
for (size_t i = 0; i < ARRAYSIZE(candidates); i++) {
|
||
|
const char *d = candidates[i];
|
||
|
if (!d) continue; // Empty env var
|
||
|
|
||
|
// Make sure we don't surprise anyone who's expecting a '/'
|
||
|
string dstr = d;
|
||
|
if (dstr[dstr.size() - 1] != '/') {
|
||
|
dstr += "/";
|
||
|
}
|
||
|
list->push_back(dstr);
|
||
|
|
||
|
struct stat statbuf;
|
||
|
if (!stat(d, &statbuf) && S_ISDIR(statbuf.st_mode)) {
|
||
|
// We found a dir that exists - we're done.
|
||
|
return;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
#endif
|
||
|
}
|
||
|
|
||
|
static vector<string>* logging_directories_list;
|
||
|
|
||
|
const vector<string>& GetLoggingDirectories() {
|
||
|
// Not strictly thread-safe but we're called early in InitGoogle().
|
||
|
if (logging_directories_list == NULL) {
|
||
|
logging_directories_list = new vector<string>;
|
||
|
|
||
|
if ( !FLAGS_log_dir.empty() ) {
|
||
|
// A dir was specified, we should use it
|
||
|
logging_directories_list->push_back(FLAGS_log_dir.c_str());
|
||
|
} else {
|
||
|
GetTempDirectories(logging_directories_list);
|
||
|
#ifdef OS_WINDOWS
|
||
|
char tmp[MAX_PATH];
|
||
|
if (GetWindowsDirectoryA(tmp, MAX_PATH))
|
||
|
logging_directories_list->push_back(tmp);
|
||
|
logging_directories_list->push_back(".\\");
|
||
|
#else
|
||
|
logging_directories_list->push_back("./");
|
||
|
#endif
|
||
|
}
|
||
|
}
|
||
|
return *logging_directories_list;
|
||
|
}
|
||
|
|
||
|
void TestOnly_ClearLoggingDirectoriesList() {
|
||
|
fprintf(stderr, "TestOnly_ClearLoggingDirectoriesList should only be "
|
||
|
"called from test code.\n");
|
||
|
delete logging_directories_list;
|
||
|
logging_directories_list = NULL;
|
||
|
}
|
||
|
|
||
|
void GetExistingTempDirectories(vector<string>* list) {
|
||
|
GetTempDirectories(list);
|
||
|
vector<string>::iterator i_dir = list->begin();
|
||
|
while( i_dir != list->end() ) {
|
||
|
// zero arg to access means test for existence; no constant
|
||
|
// defined on windows
|
||
|
if ( access(i_dir->c_str(), 0) ) {
|
||
|
i_dir = list->erase(i_dir);
|
||
|
} else {
|
||
|
++i_dir;
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
|
||
|
void TruncateLogFile(const char *path, int64 limit, int64 keep) {
|
||
|
#ifdef HAVE_UNISTD_H
|
||
|
struct stat statbuf;
|
||
|
const int kCopyBlockSize = 8 << 10;
|
||
|
char copybuf[kCopyBlockSize];
|
||
|
int64 read_offset, write_offset;
|
||
|
// Don't follow symlinks unless they're our own fd symlinks in /proc
|
||
|
int flags = O_RDWR;
|
||
|
// TODO(hamaji): Support other environments.
|
||
|
#ifdef OS_LINUX
|
||
|
const char *procfd_prefix = "/proc/self/fd/";
|
||
|
if (strncmp(procfd_prefix, path, strlen(procfd_prefix))) flags |= O_NOFOLLOW;
|
||
|
#endif
|
||
|
|
||
|
int fd = open(path, flags);
|
||
|
if (fd == -1) {
|
||
|
if (errno == EFBIG) {
|
||
|
// The log file in question has got too big for us to open. The
|
||
|
// real fix for this would be to compile logging.cc (or probably
|
||
|
// all of base/...) with -D_FILE_OFFSET_BITS=64 but that's
|
||
|
// rather scary.
|
||
|
// Instead just truncate the file to something we can manage
|
||
|
if (truncate(path, 0) == -1) {
|
||
|
PLOG(ERROR) << "Unable to truncate " << path;
|
||
|
} else {
|
||
|
LOG(ERROR) << "Truncated " << path << " due to EFBIG error";
|
||
|
}
|
||
|
} else {
|
||
|
PLOG(ERROR) << "Unable to open " << path;
|
||
|
}
|
||
|
return;
|
||
|
}
|
||
|
|
||
|
if (fstat(fd, &statbuf) == -1) {
|
||
|
PLOG(ERROR) << "Unable to fstat()";
|
||
|
goto out_close_fd;
|
||
|
}
|
||
|
|
||
|
// See if the path refers to a regular file bigger than the
|
||
|
// specified limit
|
||
|
if (!S_ISREG(statbuf.st_mode)) goto out_close_fd;
|
||
|
if (statbuf.st_size <= limit) goto out_close_fd;
|
||
|
if (statbuf.st_size <= keep) goto out_close_fd;
|
||
|
|
||
|
// This log file is too large - we need to truncate it
|
||
|
LOG(INFO) << "Truncating " << path << " to " << keep << " bytes";
|
||
|
|
||
|
// Copy the last "keep" bytes of the file to the beginning of the file
|
||
|
read_offset = statbuf.st_size - keep;
|
||
|
write_offset = 0;
|
||
|
int bytesin, bytesout;
|
||
|
while ((bytesin = pread(fd, copybuf, sizeof(copybuf), read_offset)) > 0) {
|
||
|
bytesout = pwrite(fd, copybuf, bytesin, write_offset);
|
||
|
if (bytesout == -1) {
|
||
|
PLOG(ERROR) << "Unable to write to " << path;
|
||
|
break;
|
||
|
} else if (bytesout != bytesin) {
|
||
|
LOG(ERROR) << "Expected to write " << bytesin << ", wrote " << bytesout;
|
||
|
}
|
||
|
read_offset += bytesin;
|
||
|
write_offset += bytesout;
|
||
|
}
|
||
|
if (bytesin == -1) PLOG(ERROR) << "Unable to read from " << path;
|
||
|
|
||
|
// Truncate the remainder of the file. If someone else writes to the
|
||
|
// end of the file after our last read() above, we lose their latest
|
||
|
// data. Too bad ...
|
||
|
if (ftruncate(fd, write_offset) == -1) {
|
||
|
PLOG(ERROR) << "Unable to truncate " << path;
|
||
|
}
|
||
|
|
||
|
out_close_fd:
|
||
|
close(fd);
|
||
|
#else
|
||
|
LOG(ERROR) << "No log truncation support.";
|
||
|
#endif
|
||
|
}
|
||
|
|
||
|
void TruncateStdoutStderr() {
|
||
|
#ifdef HAVE_UNISTD_H
|
||
|
int64 limit = MaxLogSize() << 20;
|
||
|
int64 keep = 1 << 20;
|
||
|
TruncateLogFile("/proc/self/fd/1", limit, keep);
|
||
|
TruncateLogFile("/proc/self/fd/2", limit, keep);
|
||
|
#else
|
||
|
LOG(ERROR) << "No log truncation support.";
|
||
|
#endif
|
||
|
}
|
||
|
|
||
|
|
||
|
// Helper functions for string comparisons.
|
||
|
#define DEFINE_CHECK_STROP_IMPL(name, func, expected) \
|
||
|
string* Check##func##expected##Impl(const char* s1, const char* s2, \
|
||
|
const char* names) { \
|
||
|
bool equal = s1 == s2 || (s1 && s2 && !func(s1, s2)); \
|
||
|
if (equal == expected) return NULL; \
|
||
|
else { \
|
||
|
ostringstream ss; \
|
||
|
if (!s1) s1 = ""; \
|
||
|
if (!s2) s2 = ""; \
|
||
|
ss << #name " failed: " << names << " (" << s1 << " vs. " << s2 << ")"; \
|
||
|
return new string(ss.str()); \
|
||
|
} \
|
||
|
}
|
||
|
DEFINE_CHECK_STROP_IMPL(CHECK_STREQ, strcmp, true)
|
||
|
DEFINE_CHECK_STROP_IMPL(CHECK_STRNE, strcmp, false)
|
||
|
DEFINE_CHECK_STROP_IMPL(CHECK_STRCASEEQ, strcasecmp, true)
|
||
|
DEFINE_CHECK_STROP_IMPL(CHECK_STRCASENE, strcasecmp, false)
|
||
|
#undef DEFINE_CHECK_STROP_IMPL
|
||
|
|
||
|
int posix_strerror_r(int err, char *buf, size_t len) {
|
||
|
// Sanity check input parameters
|
||
|
if (buf == NULL || len <= 0) {
|
||
|
errno = EINVAL;
|
||
|
return -1;
|
||
|
}
|
||
|
|
||
|
// Reset buf and errno, and try calling whatever version of strerror_r()
|
||
|
// is implemented by glibc
|
||
|
buf[0] = '\000';
|
||
|
int old_errno = errno;
|
||
|
errno = 0;
|
||
|
char *rc = reinterpret_cast<char *>(strerror_r(err, buf, len));
|
||
|
|
||
|
// Both versions set errno on failure
|
||
|
if (errno) {
|
||
|
// Should already be there, but better safe than sorry
|
||
|
buf[0] = '\000';
|
||
|
return -1;
|
||
|
}
|
||
|
errno = old_errno;
|
||
|
|
||
|
// POSIX is vague about whether the string will be terminated, although
|
||
|
// is indirectly implies that typically ERANGE will be returned, instead
|
||
|
// of truncating the string. This is different from the GNU implementation.
|
||
|
// We play it safe by always terminating the string explicitly.
|
||
|
buf[len-1] = '\000';
|
||
|
|
||
|
// If the function succeeded, we can use its exit code to determine the
|
||
|
// semantics implemented by glibc
|
||
|
if (!rc) {
|
||
|
return 0;
|
||
|
} else {
|
||
|
// GNU semantics detected
|
||
|
if (rc == buf) {
|
||
|
return 0;
|
||
|
} else {
|
||
|
buf[0] = '\000';
|
||
|
#if defined(OS_MACOSX) || defined(OS_FREEBSD) || defined(OS_OPENBSD)
|
||
|
if (reinterpret_cast<intptr_t>(rc) < sys_nerr) {
|
||
|
// This means an error on MacOSX or FreeBSD.
|
||
|
return -1;
|
||
|
}
|
||
|
#endif
|
||
|
strncat(buf, rc, len-1);
|
||
|
return 0;
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
|
||
|
string StrError(int err) {
|
||
|
char buf[100];
|
||
|
int rc = posix_strerror_r(err, buf, sizeof(buf));
|
||
|
if ((rc < 0) || (buf[0] == '\000')) {
|
||
|
snprintf(buf, sizeof(buf), "Error number %d", err);
|
||
|
}
|
||
|
return buf;
|
||
|
}
|
||
|
|
||
|
LogMessageFatal::LogMessageFatal(const char* file, int line) :
|
||
|
LogMessage(file, line, GLOG_FATAL) {}
|
||
|
|
||
|
LogMessageFatal::LogMessageFatal(const char* file, int line,
|
||
|
const CheckOpString& result) :
|
||
|
LogMessage(file, line, result) {}
|
||
|
|
||
|
LogMessageFatal::~LogMessageFatal() {
|
||
|
Flush();
|
||
|
LogMessage::Fail();
|
||
|
}
|
||
|
|
||
|
namespace base {
|
||
|
|
||
|
CheckOpMessageBuilder::CheckOpMessageBuilder(const char *exprtext)
|
||
|
: stream_(new ostringstream) {
|
||
|
*stream_ << exprtext << " (";
|
||
|
}
|
||
|
|
||
|
CheckOpMessageBuilder::~CheckOpMessageBuilder() {
|
||
|
delete stream_;
|
||
|
}
|
||
|
|
||
|
ostream* CheckOpMessageBuilder::ForVar2() {
|
||
|
*stream_ << " vs. ";
|
||
|
return stream_;
|
||
|
}
|
||
|
|
||
|
string* CheckOpMessageBuilder::NewString() {
|
||
|
*stream_ << ")";
|
||
|
return new string(stream_->str());
|
||
|
}
|
||
|
|
||
|
} // namespace base
|
||
|
|
||
|
template <>
|
||
|
void MakeCheckOpValueString(std::ostream* os, const char& v) {
|
||
|
if (v >= 32 && v <= 126) {
|
||
|
(*os) << "'" << v << "'";
|
||
|
} else {
|
||
|
(*os) << "char value " << (short)v;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
template <>
|
||
|
void MakeCheckOpValueString(std::ostream* os, const signed char& v) {
|
||
|
if (v >= 32 && v <= 126) {
|
||
|
(*os) << "'" << v << "'";
|
||
|
} else {
|
||
|
(*os) << "signed char value " << (short)v;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
template <>
|
||
|
void MakeCheckOpValueString(std::ostream* os, const unsigned char& v) {
|
||
|
if (v >= 32 && v <= 126) {
|
||
|
(*os) << "'" << v << "'";
|
||
|
} else {
|
||
|
(*os) << "unsigned char value " << (unsigned short)v;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
void InitGoogleLogging(const char* argv0) {
|
||
|
glog_internal_namespace_::InitGoogleLoggingUtilities(argv0);
|
||
|
}
|
||
|
|
||
|
void ShutdownGoogleLogging() {
|
||
|
glog_internal_namespace_::ShutdownGoogleLoggingUtilities();
|
||
|
LogDestination::DeleteLogDestinations();
|
||
|
delete logging_directories_list;
|
||
|
logging_directories_list = NULL;
|
||
|
}
|
||
|
|
||
|
_END_GOOGLE_NAMESPACE_
|