blob: b853d7ccd3ed2cb1d7c19eaed5772ad05159e112 [file] [log] [blame]
/*
* Copyright 2004 The WebRTC Project Authors. All rights reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#if defined(WEBRTC_WIN)
#if !defined(WIN32_LEAN_AND_MEAN)
#define WIN32_LEAN_AND_MEAN
#endif
#include <windows.h>
#if _MSC_VER < 1900
#define snprintf _snprintf
#endif
#undef ERROR // wingdi.h
#endif
#if defined(WEBRTC_MAC) && !defined(WEBRTC_IOS)
#include <CoreServices/CoreServices.h>
#elif defined(WEBRTC_ANDROID)
#include <android/log.h>
// Android has a 1024 limit on log inputs. We use 60 chars as an
// approx for the header/tag portion.
// See android/system/core/liblog/logd_write.c
static const int kMaxLogLineSize = 1024 - 60;
#endif // WEBRTC_MAC && !defined(WEBRTC_IOS) || WEBRTC_ANDROID
static const char kLibjingle[] = "libjingle";
#include <time.h>
#include <limits.h>
#include <algorithm>
#include <iomanip>
#include <ostream>
#include <vector>
#include "rtc_base/criticalsection.h"
#include "rtc_base/logging.h"
#include "rtc_base/platform_thread.h"
#include "rtc_base/stringencode.h"
#include "rtc_base/stringutils.h"
#include "rtc_base/timeutils.h"
namespace rtc {
namespace {
// Return the filename portion of the string (that following the last slash).
const char* FilenameFromPath(const char* file) {
const char* end1 = ::strrchr(file, '/');
const char* end2 = ::strrchr(file, '\\');
if (!end1 && !end2)
return file;
else
return (end1 > end2) ? end1 + 1 : end2 + 1;
}
} // namespace
/////////////////////////////////////////////////////////////////////////////
// Constant Labels
/////////////////////////////////////////////////////////////////////////////
const char* FindLabel(int value, const ConstantLabel entries[]) {
for (int i = 0; entries[i].label; ++i) {
if (value == entries[i].value) {
return entries[i].label;
}
}
return 0;
}
std::string ErrorName(int err, const ConstantLabel* err_table) {
if (err == 0)
return "No error";
if (err_table != 0) {
if (const char* value = FindLabel(err, err_table))
return value;
}
char buffer[16];
snprintf(buffer, sizeof(buffer), "0x%08x", err);
return buffer;
}
/////////////////////////////////////////////////////////////////////////////
// LogMessage
/////////////////////////////////////////////////////////////////////////////
// By default, release builds don't log, debug builds at info level
#if !defined(NDEBUG)
LoggingSeverity LogMessage::min_sev_ = LS_INFO;
LoggingSeverity LogMessage::dbg_sev_ = LS_INFO;
#else
LoggingSeverity LogMessage::min_sev_ = LS_NONE;
LoggingSeverity LogMessage::dbg_sev_ = LS_NONE;
#endif
bool LogMessage::log_to_stderr_ = true;
namespace {
// Global lock for log subsystem, only needed to serialize access to streams_.
CriticalSection g_log_crit;
} // namespace
// The list of logging streams currently configured.
// Note: we explicitly do not clean this up, because of the uncertain ordering
// of destructors at program exit. Let the person who sets the stream trigger
// cleanup by setting to null, or let it leak (safe at program exit).
LogMessage::StreamList LogMessage::streams_ RTC_GUARDED_BY(g_log_crit);
// Boolean options default to false (0)
bool LogMessage::thread_, LogMessage::timestamp_;
LogMessage::LogMessage(const char* file,
int line,
LoggingSeverity sev,
LogErrorContext err_ctx,
int err,
const char* module)
: severity_(sev), tag_(kLibjingle) {
if (timestamp_) {
// Use SystemTimeMillis so that even if tests use fake clocks, the timestamp
// in log messages represents the real system time.
int64_t time = TimeDiff(SystemTimeMillis(), LogStartTime());
// Also ensure WallClockStartTime is initialized, so that it matches
// LogStartTime.
WallClockStartTime();
print_stream_ << "[" << std::setfill('0') << std::setw(3) << (time / 1000)
<< ":" << std::setw(3) << (time % 1000) << std::setfill(' ')
<< "] ";
}
if (thread_) {
PlatformThreadId id = CurrentThreadId();
print_stream_ << "[" << std::dec << id << "] ";
}
if (file != nullptr)
print_stream_ << "(" << FilenameFromPath(file) << ":" << line << "): ";
if (err_ctx != ERRCTX_NONE) {
std::ostringstream tmp;
tmp << "[0x" << std::setfill('0') << std::hex << std::setw(8) << err << "]";
switch (err_ctx) {
case ERRCTX_ERRNO:
tmp << " " << strerror(err);
break;
#ifdef WEBRTC_WIN
case ERRCTX_HRESULT: {
char msgbuf[256];
DWORD flags = FORMAT_MESSAGE_FROM_SYSTEM;
HMODULE hmod = GetModuleHandleA(module);
if (hmod)
flags |= FORMAT_MESSAGE_FROM_HMODULE;
if (DWORD len = FormatMessageA(
flags, hmod, err, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
msgbuf, sizeof(msgbuf) / sizeof(msgbuf[0]), nullptr)) {
while ((len > 0) &&
isspace(static_cast<unsigned char>(msgbuf[len-1]))) {
msgbuf[--len] = 0;
}
tmp << " " << msgbuf;
}
break;
}
#endif // WEBRTC_WIN
#if defined(WEBRTC_MAC) && !defined(WEBRTC_IOS)
case ERRCTX_OSSTATUS: {
std::string desc(DescriptionFromOSStatus(err));
tmp << " " << (desc.empty() ? "Unknown error" : desc.c_str());
break;
}
#endif // WEBRTC_MAC && !defined(WEBRTC_IOS)
default:
break;
}
extra_ = tmp.str();
}
}
LogMessage::LogMessage(const char* file,
int line,
LoggingSeverity sev,
const std::string& tag)
: LogMessage(file,
line,
sev,
ERRCTX_NONE,
0 /* err */,
nullptr /* module */) {
tag_ = tag;
print_stream_ << tag << ": ";
}
LogMessage::~LogMessage() {
if (!extra_.empty())
print_stream_ << " : " << extra_;
print_stream_ << std::endl;
const std::string& str = print_stream_.str();
if (severity_ >= dbg_sev_) {
OutputToDebug(str, severity_, tag_);
}
CritScope cs(&g_log_crit);
for (auto& kv : streams_) {
if (severity_ >= kv.second) {
kv.first->OnLogMessage(str);
}
}
}
int64_t LogMessage::LogStartTime() {
static const int64_t g_start = SystemTimeMillis();
return g_start;
}
uint32_t LogMessage::WallClockStartTime() {
static const uint32_t g_start_wallclock = time(nullptr);
return g_start_wallclock;
}
void LogMessage::LogThreads(bool on) {
thread_ = on;
}
void LogMessage::LogTimestamps(bool on) {
timestamp_ = on;
}
void LogMessage::LogToDebug(LoggingSeverity min_sev) {
dbg_sev_ = min_sev;
CritScope cs(&g_log_crit);
UpdateMinLogSeverity();
}
void LogMessage::SetLogToStderr(bool log_to_stderr) {
log_to_stderr_ = log_to_stderr;
}
int LogMessage::GetLogToStream(LogSink* stream) {
CritScope cs(&g_log_crit);
LoggingSeverity sev = LS_NONE;
for (auto& kv : streams_) {
if (!stream || stream == kv.first) {
sev = std::min(sev, kv.second);
}
}
return sev;
}
void LogMessage::AddLogToStream(LogSink* stream, LoggingSeverity min_sev) {
CritScope cs(&g_log_crit);
streams_.push_back(std::make_pair(stream, min_sev));
UpdateMinLogSeverity();
}
void LogMessage::RemoveLogToStream(LogSink* stream) {
CritScope cs(&g_log_crit);
for (StreamList::iterator it = streams_.begin(); it != streams_.end(); ++it) {
if (stream == it->first) {
streams_.erase(it);
break;
}
}
UpdateMinLogSeverity();
}
void LogMessage::ConfigureLogging(const char* params) {
LoggingSeverity current_level = LS_VERBOSE;
LoggingSeverity debug_level = GetLogToDebug();
std::vector<std::string> tokens;
tokenize(params, ' ', &tokens);
for (const std::string& token : tokens) {
if (token.empty())
continue;
// Logging features
if (token == "tstamp") {
LogTimestamps();
} else if (token == "thread") {
LogThreads();
// Logging levels
} else if (token == "sensitive") {
current_level = LS_SENSITIVE;
} else if (token == "verbose") {
current_level = LS_VERBOSE;
} else if (token == "info") {
current_level = LS_INFO;
} else if (token == "warning") {
current_level = LS_WARNING;
} else if (token == "error") {
current_level = LS_ERROR;
} else if (token == "none") {
current_level = LS_NONE;
// Logging targets
} else if (token == "debug") {
debug_level = current_level;
}
}
#if defined(WEBRTC_WIN)
if ((LS_NONE != debug_level) && !::IsDebuggerPresent()) {
// First, attempt to attach to our parent's console... so if you invoke
// from the command line, we'll see the output there. Otherwise, create
// our own console window.
// Note: These methods fail if a console already exists, which is fine.
bool success = false;
typedef BOOL (WINAPI* PFN_AttachConsole)(DWORD);
if (HINSTANCE kernel32 = ::LoadLibrary(L"kernel32.dll")) {
// AttachConsole is defined on WinXP+.
if (PFN_AttachConsole attach_console = reinterpret_cast<PFN_AttachConsole>
(::GetProcAddress(kernel32, "AttachConsole"))) {
success = (FALSE != attach_console(ATTACH_PARENT_PROCESS));
}
::FreeLibrary(kernel32);
}
if (!success) {
::AllocConsole();
}
}
#endif // WEBRTC_WIN
LogToDebug(debug_level);
}
void LogMessage::UpdateMinLogSeverity()
RTC_EXCLUSIVE_LOCKS_REQUIRED(g_log_crit) {
LoggingSeverity min_sev = dbg_sev_;
for (auto& kv : streams_) {
min_sev = std::min(dbg_sev_, kv.second);
}
min_sev_ = min_sev;
}
void LogMessage::OutputToDebug(const std::string& str,
LoggingSeverity severity,
const std::string& tag) {
bool log_to_stderr = log_to_stderr_;
#if defined(WEBRTC_MAC) && !defined(WEBRTC_IOS) && defined(NDEBUG)
// On the Mac, all stderr output goes to the Console log and causes clutter.
// So in opt builds, don't log to stderr unless the user specifically sets
// a preference to do so.
CFStringRef key = CFStringCreateWithCString(kCFAllocatorDefault,
"logToStdErr",
kCFStringEncodingUTF8);
CFStringRef domain = CFBundleGetIdentifier(CFBundleGetMainBundle());
if (key != nullptr && domain != nullptr) {
Boolean exists_and_is_valid;
Boolean should_log =
CFPreferencesGetAppBooleanValue(key, domain, &exists_and_is_valid);
// If the key doesn't exist or is invalid or is false, we will not log to
// stderr.
log_to_stderr = exists_and_is_valid && should_log;
}
if (key != nullptr) {
CFRelease(key);
}
#endif
#if defined(WEBRTC_WIN)
// Always log to the debugger.
// Perhaps stderr should be controlled by a preference, as on Mac?
OutputDebugStringA(str.c_str());
if (log_to_stderr) {
// This handles dynamically allocated consoles, too.
if (HANDLE error_handle = ::GetStdHandle(STD_ERROR_HANDLE)) {
log_to_stderr = false;
DWORD written = 0;
::WriteFile(error_handle, str.data(), static_cast<DWORD>(str.size()),
&written, 0);
}
}
#endif // WEBRTC_WIN
#if defined(WEBRTC_ANDROID)
// Android's logging facility uses severity to log messages but we
// need to map libjingle's severity levels to Android ones first.
// Also write to stderr which maybe available to executable started
// from the shell.
int prio;
switch (severity) {
case LS_SENSITIVE:
__android_log_write(ANDROID_LOG_INFO, tag.c_str(), "SENSITIVE");
if (log_to_stderr) {
fprintf(stderr, "SENSITIVE");
fflush(stderr);
}
return;
case LS_VERBOSE:
prio = ANDROID_LOG_VERBOSE;
break;
case LS_INFO:
prio = ANDROID_LOG_INFO;
break;
case LS_WARNING:
prio = ANDROID_LOG_WARN;
break;
case LS_ERROR:
prio = ANDROID_LOG_ERROR;
break;
default:
prio = ANDROID_LOG_UNKNOWN;
}
int size = str.size();
int line = 0;
int idx = 0;
const int max_lines = size / kMaxLogLineSize + 1;
if (max_lines == 1) {
__android_log_print(prio, tag.c_str(), "%.*s", size, str.c_str());
} else {
while (size > 0) {
const int len = std::min(size, kMaxLogLineSize);
// Use the size of the string in the format (str may have \0 in the
// middle).
__android_log_print(prio, tag.c_str(), "[%d/%d] %.*s",
line + 1, max_lines,
len, str.c_str() + idx);
idx += len;
size -= len;
++line;
}
}
#endif // WEBRTC_ANDROID
if (log_to_stderr) {
fprintf(stderr, "%s", str.c_str());
fflush(stderr);
}
}
//////////////////////////////////////////////////////////////////////
// Logging Helpers
//////////////////////////////////////////////////////////////////////
void LogMultiline(LoggingSeverity level, const char* label, bool input,
const void* data, size_t len, bool hex_mode,
LogMultilineState* state) {
if (!LOG_CHECK_LEVEL_V(level))
return;
const char * direction = (input ? " << " : " >> ");
// null data means to flush our count of unprintable characters.
if (!data) {
if (state && state->unprintable_count_[input]) {
LOG_V(level) << label << direction << "## "
<< state->unprintable_count_[input]
<< " consecutive unprintable ##";
state->unprintable_count_[input] = 0;
}
return;
}
// The ctype classification functions want unsigned chars.
const unsigned char* udata = static_cast<const unsigned char*>(data);
if (hex_mode) {
const size_t LINE_SIZE = 24;
char hex_line[LINE_SIZE * 9 / 4 + 2], asc_line[LINE_SIZE + 1];
while (len > 0) {
memset(asc_line, ' ', sizeof(asc_line));
memset(hex_line, ' ', sizeof(hex_line));
size_t line_len = std::min(len, LINE_SIZE);
for (size_t i = 0; i < line_len; ++i) {
unsigned char ch = udata[i];
asc_line[i] = isprint(ch) ? ch : '.';
hex_line[i*2 + i/4] = hex_encode(ch >> 4);
hex_line[i*2 + i/4 + 1] = hex_encode(ch & 0xf);
}
asc_line[sizeof(asc_line)-1] = 0;
hex_line[sizeof(hex_line)-1] = 0;
LOG_V(level) << label << direction
<< asc_line << " " << hex_line << " ";
udata += line_len;
len -= line_len;
}
return;
}
size_t consecutive_unprintable = state ? state->unprintable_count_[input] : 0;
const unsigned char* end = udata + len;
while (udata < end) {
const unsigned char* line = udata;
const unsigned char* end_of_line = strchrn<unsigned char>(udata,
end - udata,
'\n');
if (!end_of_line) {
udata = end_of_line = end;
} else {
udata = end_of_line + 1;
}
bool is_printable = true;
// If we are in unprintable mode, we need to see a line of at least
// kMinPrintableLine characters before we'll switch back.
const ptrdiff_t kMinPrintableLine = 4;
if (consecutive_unprintable && ((end_of_line - line) < kMinPrintableLine)) {
is_printable = false;
} else {
// Determine if the line contains only whitespace and printable
// characters.
bool is_entirely_whitespace = true;
for (const unsigned char* pos = line; pos < end_of_line; ++pos) {
if (isspace(*pos))
continue;
is_entirely_whitespace = false;
if (!isprint(*pos)) {
is_printable = false;
break;
}
}
// Treat an empty line following unprintable data as unprintable.
if (consecutive_unprintable && is_entirely_whitespace) {
is_printable = false;
}
}
if (!is_printable) {
consecutive_unprintable += (udata - line);
continue;
}
// Print out the current line, but prefix with a count of prior unprintable
// characters.
if (consecutive_unprintable) {
LOG_V(level) << label << direction << "## " << consecutive_unprintable
<< " consecutive unprintable ##";
consecutive_unprintable = 0;
}
// Strip off trailing whitespace.
while ((end_of_line > line) && isspace(*(end_of_line-1))) {
--end_of_line;
}
// Filter out any private data
std::string substr(reinterpret_cast<const char*>(line), end_of_line - line);
std::string::size_type pos_private = substr.find("Email");
if (pos_private == std::string::npos) {
pos_private = substr.find("Passwd");
}
if (pos_private == std::string::npos) {
LOG_V(level) << label << direction << substr;
} else {
LOG_V(level) << label << direction << "## omitted for privacy ##";
}
}
if (state) {
state->unprintable_count_[input] = consecutive_unprintable;
}
}
//////////////////////////////////////////////////////////////////////
} // namespace rtc