transmission/libtransmission/log.cc

311 lines
6.7 KiB
C++

// This file Copyright © 2010-2022 Mnemosyne LLC.
// It may be used under GPLv2 (SPDX: GPL-2.0), GPLv3 (SPDX: GPL-3.0),
// or any future license endorsed by Mnemosyne LLC.
// License text can be found in the licenses/ folder.
#include <cerrno>
#include <cstdarg>
#include <cstdio>
#include <mutex>
#include <event2/buffer.h>
#include "transmission.h"
#include "file.h"
#include "log.h"
#include "tr-assert.h"
#include "utils.h"
#ifdef __ANDROID__
#include <android/log.h>
#endif
using namespace std::literals;
tr_log_level __tr_message_level = TR_LOG_ERROR;
static bool myQueueEnabled = false;
static tr_log_message* myQueue = nullptr;
static tr_log_message** myQueueTail = &myQueue;
static int myQueueLength = 0;
#ifndef _WIN32
/* make null versions of these win32 functions */
static inline bool IsDebuggerPresent()
{
return false;
}
#endif
/***
****
***/
tr_log_level tr_logGetLevel()
{
return __tr_message_level;
}
/***
****
***/
static std::recursive_mutex message_mutex_;
tr_sys_file_t tr_logGetFile()
{
static bool initialized = false;
static tr_sys_file_t file = TR_BAD_SYS_FILE;
if (!initialized)
{
switch (tr_env_get_int("TR_DEBUG_FD", 0))
{
case 1:
file = tr_sys_file_get_std(TR_STD_SYS_FILE_OUT, nullptr);
break;
case 2:
file = tr_sys_file_get_std(TR_STD_SYS_FILE_ERR, nullptr);
break;
default:
file = TR_BAD_SYS_FILE;
break;
}
initialized = true;
}
return file;
}
void tr_logSetLevel(tr_log_level level)
{
__tr_message_level = level;
}
void tr_logSetQueueEnabled(bool isEnabled)
{
myQueueEnabled = isEnabled;
}
bool tr_logGetQueueEnabled()
{
return myQueueEnabled;
}
tr_log_message* tr_logGetQueue()
{
auto const lock = std::lock_guard(message_mutex_);
auto* const ret = myQueue;
myQueue = nullptr;
myQueueTail = &myQueue;
myQueueLength = 0;
return ret;
}
void tr_logFreeQueue(tr_log_message* list)
{
while (list != nullptr)
{
tr_log_message* next = list->next;
tr_free(list->message);
tr_free(list->name);
tr_free(list);
list = next;
}
}
/**
***
**/
char* tr_logGetTimeStr(char* buf, size_t buflen)
{
struct timeval tv;
tr_gettimeofday(&tv);
time_t const seconds = tv.tv_sec;
auto const milliseconds = int(tv.tv_usec / 1000);
char msec_str[8];
tr_snprintf(msec_str, sizeof msec_str, "%03d", milliseconds);
struct tm now_tm;
tr_localtime_r(&seconds, &now_tm);
char date_str[32];
strftime(date_str, sizeof(date_str), "%Y-%m-%d %H:%M:%S", &now_tm);
tr_snprintf(buf, buflen, "%s.%s", date_str, msec_str);
return buf;
}
bool tr_logGetDeepEnabled()
{
static int8_t deepLoggingIsActive = -1;
if (deepLoggingIsActive < 0)
{
deepLoggingIsActive = (int8_t)(IsDebuggerPresent() || tr_logGetFile() != TR_BAD_SYS_FILE);
}
return deepLoggingIsActive != 0;
}
void tr_logAddDeep(char const* file, int line, char const* name, char const* fmt, ...)
{
tr_sys_file_t const fp = tr_logGetFile();
if (fp != TR_BAD_SYS_FILE || IsDebuggerPresent())
{
struct evbuffer* buf = evbuffer_new();
char* base = tr_sys_path_basename(file, nullptr);
char timestr[64];
evbuffer_add_printf(buf, "[%s] ", tr_logGetTimeStr(timestr, sizeof(timestr)));
if (name != nullptr)
{
evbuffer_add_printf(buf, "%s ", name);
}
va_list args;
va_start(args, fmt);
evbuffer_add_vprintf(buf, fmt, args);
va_end(args);
evbuffer_add_printf(buf, " (%s:%d)" TR_NATIVE_EOL_STR, base, line);
auto const message = evbuffer_free_to_str(buf);
#ifdef _WIN32
OutputDebugStringA(message.c_str());
#endif
if (fp != TR_BAD_SYS_FILE)
{
tr_sys_file_write(fp, std::data(message), std::size(message), nullptr, nullptr);
}
tr_free(base);
}
}
/***
****
***/
void tr_logAddMessage(char const* file, int line, tr_log_level level, char const* name, char const* fmt, ...)
{
int const err = errno; /* message logging shouldn't affect errno */
char buf[1024];
va_list ap;
auto const lock = std::lock_guard(message_mutex_);
/* build the text message */
*buf = '\0';
va_start(ap, fmt);
int const buf_len = evutil_vsnprintf(buf, sizeof(buf), fmt, ap);
va_end(ap);
if (buf_len < 0)
{
errno = err;
return;
}
#ifdef _WIN32
if ((size_t)buf_len < sizeof(buf) - 3)
{
buf[buf_len + 0] = '\r';
buf[buf_len + 1] = '\n';
buf[buf_len + 2] = '\0';
OutputDebugStringA(buf);
buf[buf_len + 0] = '\0';
}
else
{
OutputDebugStringA(buf);
}
#elif defined(__ANDROID__)
int prio;
switch (level)
{
case TR_LOG_ERROR:
prio = ANDROID_LOG_ERROR;
break;
case TR_LOG_INFO:
prio = ANDROID_LOG_INFO;
break;
case TR_LOG_DEBUG:
prio = ANDROID_LOG_DEBUG;
break;
default:
prio = ANDROID_LOG_VERBOSE;
}
#ifdef NDEBUG
__android_log_print(prio, "transmission", "%s", buf);
#else
__android_log_print(prio, "transmission", "[%s:%d] %s", file, line, buf);
#endif
#else
if (!tr_str_is_empty(buf))
{
if (tr_logGetQueueEnabled())
{
auto* const newmsg = tr_new0(tr_log_message, 1);
newmsg->level = level;
newmsg->when = tr_time();
newmsg->message = tr_strndup(buf, buf_len);
newmsg->file = file;
newmsg->line = line;
newmsg->name = tr_strdup(name);
*myQueueTail = newmsg;
myQueueTail = &newmsg->next;
++myQueueLength;
if (myQueueLength > TR_LOG_MAX_QUEUE_LENGTH)
{
tr_log_message* old = myQueue;
myQueue = old->next;
old->next = nullptr;
tr_logFreeQueue(old);
--myQueueLength;
TR_ASSERT(myQueueLength == TR_LOG_MAX_QUEUE_LENGTH);
}
}
else
{
char timestr[64];
tr_sys_file_t fp = tr_logGetFile();
if (fp == TR_BAD_SYS_FILE)
{
fp = tr_sys_file_get_std(TR_STD_SYS_FILE_ERR, nullptr);
}
tr_logGetTimeStr(timestr, sizeof(timestr));
auto const out = name != nullptr ? tr_strvJoin("["sv, timestr, "] "sv, name, ": "sv, buf) :
tr_strvJoin("["sv, timestr, "] "sv, buf);
tr_sys_file_write_line(fp, out, nullptr);
tr_sys_file_flush(fp, nullptr);
}
}
#endif
errno = err;
}