1 //===-- OsLogger.cpp --------------------------------------------*- C++ -*-===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 
10 #include "OsLogger.h"
11 
12 #if LLDB_USE_OS_LOG
13 
14 #include <os/log.h>
15 
16 #include "DNBDefs.h"
17 #include "DNBLog.h"
18 
19 #define LLDB_OS_LOG_MAX_BUFFER_LENGTH 256
20 
21 namespace {
22 //----------------------------------------------------------------------
23 // Darwin os_log logging callback that can be registered with
24 // DNBLogSetLogCallback
25 //----------------------------------------------------------------------
26 void DarwinLogCallback(void *baton, uint32_t flags, const char *format,
27                        va_list args) {
28   if (format == nullptr)
29     return;
30 
31   static os_log_t g_logger;
32   if (!g_logger) {
33     g_logger = os_log_create("com.apple.dt.lldb", "debugserver");
34     if (!g_logger)
35       return;
36   }
37 
38   os_log_type_t log_type;
39   if (flags & DNBLOG_FLAG_FATAL)
40     log_type = OS_LOG_TYPE_FAULT;
41   else if (flags & DNBLOG_FLAG_ERROR)
42     log_type = OS_LOG_TYPE_ERROR;
43   else if (flags & DNBLOG_FLAG_WARNING)
44     log_type = OS_LOG_TYPE_DEFAULT;
45   else if (flags & DNBLOG_FLAG_VERBOSE)
46     log_type = OS_LOG_TYPE_DEBUG;
47   else
48     log_type = OS_LOG_TYPE_DEFAULT;
49 
50   // This code is unfortunate.  os_log* only takes static strings, but
51   // our current log API isn't set up to make use of that style.
52   char buffer[LLDB_OS_LOG_MAX_BUFFER_LENGTH];
53   vsnprintf(buffer, sizeof(buffer), format, args);
54   os_log_with_type(g_logger, log_type, "%{public}s", buffer);
55 }
56 }
57 
58 DNBCallbackLog OsLogger::GetLogFunction() {
59   return _os_log_impl ? DarwinLogCallback : nullptr;
60 }
61 
62 #else
63 
64 DNBCallbackLog OsLogger::GetLogFunction() { return nullptr; }
65 
66 #endif
67