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Merge "Support logging to other log buffers."

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This commit is contained in:
Dan Albert 2015-04-03 17:21:44 +00:00 committed by Gerrit Code Review
commit 87eca3cb4b
2 changed files with 66 additions and 34 deletions
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60
base/include/base/logging.h
View file

@ -34,6 +34,11 @@ enum LogSeverity {
FATAL,
};
enum LogId {
MAIN,
SYSTEM,
};
// Configure logging based on ANDROID_LOG_TAGS environment variable.
// We need to parse a string that looks like
//
@ -60,15 +65,26 @@ extern const char* ProgramInvocationShortName();
// FATAL it also causes an abort. For example:
//
// LOG(FATAL) << "We didn't expect to reach here";
#define LOG(severity) \
::android::base::LogMessage(__FILE__, __LINE__, ::android::base::severity, \
-1).stream()
#define LOG(severity) \
::android::base::LogMessage(__FILE__, __LINE__, ::android::base::MAIN, \
::android::base::severity, -1).stream()
// Logs a message to logcat with the specified log ID on Android otherwise to
// stderr. If the severity is FATAL it also causes an abort.
#define LOG_TO(dest, severity) \
::android::base::LogMessage(__FILE__, __LINE__, ::android::base::dest, \
::android::base::severity, -1).stream()
// A variant of LOG that also logs the current errno value. To be used when
// library calls fail.
#define PLOG(severity) \
::android::base::LogMessage(__FILE__, __LINE__, ::android::base::severity, \
errno).stream()
#define PLOG(severity) \
::android::base::LogMessage(__FILE__, __LINE__, ::android::base::MAIN, \
::android::base::severity, errno).stream()
// Behaves like PLOG, but logs to the specified log ID.
#define PLOG_TO(dest, severity) \
::android::base::LogMessage(__FILE__, __LINE__, ::android::base::dest, \
::android::base::severity, errno).stream()
// Marker that code is yet to be implemented.
#define UNIMPLEMENTED(level) \
@ -80,20 +96,20 @@ extern const char* ProgramInvocationShortName();
//
// CHECK(false == true) results in a log message of
// "Check failed: false == true".
#define CHECK(x) \
if (UNLIKELY(!(x))) \
::android::base::LogMessage(__FILE__, __LINE__, ::android::base::FATAL, \
-1).stream() \
<< "Check failed: " #x << " "
#define CHECK(x) \
if (UNLIKELY(!(x))) \
::android::base::LogMessage(__FILE__, __LINE__, ::android::base::MAIN, \
::android::base::FATAL, -1).stream() \
<< "Check failed: " #x << " "
// Helper for CHECK_xx(x,y) macros.
#define CHECK_OP(LHS, RHS, OP) \
for (auto _values = ::android::base::MakeEagerEvaluator(LHS, RHS); \
UNLIKELY(!(_values.lhs OP _values.rhs)); \
/* empty */) \
::android::base::LogMessage(__FILE__, __LINE__, ::android::base::FATAL, -1) \
.stream() \
<< "Check failed: " << #LHS << " " << #OP << " " << #RHS \
#define CHECK_OP(LHS, RHS, OP) \
for (auto _values = ::android::base::MakeEagerEvaluator(LHS, RHS); \
UNLIKELY(!(_values.lhs OP _values.rhs)); \
/* empty */) \
::android::base::LogMessage(__FILE__, __LINE__, ::android::base::MAIN, \
::android::base::FATAL, -1).stream() \
<< "Check failed: " << #LHS << " " << #OP << " " << #RHS \
<< " (" #LHS "=" << _values.lhs << ", " #RHS "=" << _values.rhs << ") "
// Check whether a condition holds between x and y, LOG(FATAL) if not. The value
@ -228,8 +244,8 @@ class LogMessageData;
// of a CHECK. The destructor will abort if the severity is FATAL.
class LogMessage {
public:
LogMessage(const char* file, unsigned int line, LogSeverity severity,
int error);
LogMessage(const char* file, unsigned int line, LogId id,
LogSeverity severity, int error);
~LogMessage();
@ -238,8 +254,8 @@ class LogMessage {
std::ostream& stream();
// The routine that performs the actual logging.
static void LogLine(const char* file, unsigned int line, LogSeverity severity,
const char* msg);
static void LogLine(const char* file, unsigned int line, LogId id,
LogSeverity severity, const char* msg);
private:
const std::unique_ptr<LogMessageData> data_;

40
base/logging.cpp
View file

@ -128,9 +128,13 @@ void InitLogging(char* argv[]) {
// checks/logging in a function.
class LogMessageData {
public:
LogMessageData(const char* file, unsigned int line, LogSeverity severity,
int error)
: file_(file), line_number_(line), severity_(severity), error_(error) {
LogMessageData(const char* file, unsigned int line, LogId id,
LogSeverity severity, int error)
: file_(file),
line_number_(line),
id_(id),
severity_(severity),
error_(error) {
const char* last_slash = strrchr(file, '/');
file = (last_slash == nullptr) ? file : last_slash + 1;
}
@ -147,6 +151,10 @@ class LogMessageData {
return severity_;
}
LogId GetId() const {
return id_;
}
int GetError() const {
return error_;
}
@ -163,15 +171,16 @@ class LogMessageData {
std::ostringstream buffer_;
const char* const file_;
const unsigned int line_number_;
const LogId id_;
const LogSeverity severity_;
const int error_;
DISALLOW_COPY_AND_ASSIGN(LogMessageData);
};
LogMessage::LogMessage(const char* file, unsigned int line,
LogMessage::LogMessage(const char* file, unsigned int line, LogId id,
LogSeverity severity, int error)
: data_(new LogMessageData(file, line, severity, error)) {
: data_(new LogMessageData(file, line, id, severity, error)) {
}
LogMessage::~LogMessage() {
@ -189,16 +198,16 @@ LogMessage::~LogMessage() {
{
std::lock_guard<std::mutex> lock(logging_lock);
if (msg.find('\n') == std::string::npos) {
LogLine(data_->GetFile(), data_->GetLineNumber(), data_->GetSeverity(),
msg.c_str());
LogLine(data_->GetFile(), data_->GetLineNumber(), data_->GetId(),
data_->GetSeverity(), msg.c_str());
} else {
msg += '\n';
size_t i = 0;
while (i < msg.size()) {
size_t nl = msg.find('\n', i);
msg[nl] = '\0';
LogLine(data_->GetFile(), data_->GetLineNumber(), data_->GetSeverity(),
&msg[i]);
LogLine(data_->GetFile(), data_->GetLineNumber(), data_->GetId(),
data_->GetSeverity(), &msg[i]);
i = nl + 1;
}
}
@ -224,19 +233,26 @@ static const android_LogPriority kLogSeverityToAndroidLogPriority[] = {
static_assert(arraysize(kLogSeverityToAndroidLogPriority) == FATAL + 1,
"Mismatch in size of kLogSeverityToAndroidLogPriority and values "
"in LogSeverity");
static const log_id kLogIdToAndroidLogId[] = {LOG_ID_MAIN, LOG_ID_SYSTEM};
static_assert(arraysize(kLogIdToAndroidLogId) == SYSTEM + 1,
"Mismatch in size of kLogIdToAndroidLogId and values "
"in LogSeverity");
#endif
void LogMessage::LogLine(const char* file, unsigned int line,
void LogMessage::LogLine(const char* file, unsigned int line, LogId id,
LogSeverity log_severity, const char* message) {
#ifdef __ANDROID__
const char* tag = ProgramInvocationShortName();
int priority = kLogSeverityToAndroidLogPriority[log_severity];
log_id lg_id = kLogIdToAndroidLogId[id];
if (priority == ANDROID_LOG_FATAL) {
LOG_PRI(priority, tag, "%s:%u] %s", file, line, message);
__android_log_buf_print(lg_id, priority, tag, "%s:%u] %s", file, line, message);
} else {
LOG_PRI(priority, tag, "%s", message);
__android_log_buf_print(lg_id, priority, tag, "%s", message);
}
#else
UNUSED(id);
static const char* log_characters = "VDIWEF";
CHECK_EQ(strlen(log_characters), FATAL + 1U);
char severity = log_characters[log_severity];