| // Copyright 2010 Google Inc. |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| // |
| // Author: jmarantz@google.com (Joshua Marantz) |
| // Author: sligocki@google.com (Shawn Ligocki) |
| // Author: jefftk@google.com (Jeff Kaufman) |
| |
| // TODO(jefftk): share more of this code with apache's log_message_handler |
| |
| #include "log_message_handler.h" |
| |
| #include <unistd.h> |
| |
| #include <limits> |
| #include <string> |
| |
| #include "base/debug/debugger.h" |
| #include "base/debug/stack_trace.h" |
| #include "base/logging.h" |
| #include "net/instaweb/public/version.h" |
| #include "net/instaweb/util/public/string_util.h" |
| |
| // Make sure we don't attempt to use LOG macros here, since doing so |
| // would cause us to go into an infinite log loop. |
| #undef LOG |
| #define LOG USING_LOG_HERE_WOULD_CAUSE_INFINITE_RECURSION |
| |
| namespace { |
| |
| ngx_log_t* log = NULL; |
| |
| ngx_uint_t GetNgxLogLevel(int severity) { |
| switch (severity) { |
| case logging::LOG_INFO: |
| return NGX_LOG_INFO; |
| case logging::LOG_WARNING: |
| return NGX_LOG_WARN; |
| case logging::LOG_ERROR: |
| return NGX_LOG_ERR; |
| case logging::LOG_ERROR_REPORT: |
| case logging::LOG_FATAL: |
| return NGX_LOG_ALERT; |
| default: // For VLOG(s) |
| return NGX_LOG_DEBUG; |
| } |
| } |
| |
| bool LogMessageHandler(int severity, const char* file, int line, |
| size_t message_start, const GoogleString& str) { |
| ngx_uint_t this_log_level = GetNgxLogLevel(severity); |
| |
| GoogleString message = str; |
| if (severity == logging::LOG_FATAL) { |
| if (base::debug::BeingDebugged()) { |
| base::debug::BreakDebugger(); |
| } else { |
| base::debug::StackTrace trace; |
| std::ostringstream stream; |
| trace.OutputToStream(&stream); |
| message.append(stream.str()); |
| } |
| } |
| |
| // Trim the newline off the end of the message string. |
| size_t last_msg_character_index = message.length() - 1; |
| if (message[last_msg_character_index] == '\n') { |
| message.resize(last_msg_character_index); |
| } |
| |
| ngx_log_error(this_log_level, log, 0, "[ngx_pagespeed %s] %s", |
| net_instaweb::kModPagespeedVersion, |
| message.c_str()); |
| |
| if (severity == logging::LOG_FATAL) { |
| // Crash the process to generate a dump. |
| base::debug::BreakDebugger(); |
| } |
| |
| return true; |
| } |
| |
| } // namespace |
| |
| |
| namespace net_instaweb { |
| |
| namespace log_message_handler { |
| |
| |
| void Install(ngx_log_t* log_in) { |
| log = log_in; |
| logging::SetLogMessageHandler(&LogMessageHandler); |
| |
| // All VLOG(2) and higher will be displayed as DEBUG logs if the nginx log |
| // level is DEBUG. |
| if (log->log_level >= NGX_LOG_DEBUG) { |
| logging::SetMinLogLevel(-2); |
| } |
| } |
| |
| } // namespace log_message_handler |
| |
| } // namespace net_instaweb |