Switch "lldb" log channel to the new registration mechanism

llvm-svn: 295823
diff --git a/lldb/source/Core/Logging.cpp b/lldb/source/Core/Logging.cpp
index 49e22c4..1502713 100644
--- a/lldb/source/Core/Logging.cpp
+++ b/lldb/source/Core/Logging.cpp
@@ -23,292 +23,58 @@
 using namespace lldb;
 using namespace lldb_private;
 
-// We want to avoid global constructors where code needs to be run so here we
-// control access to our static g_log_sp by hiding it in a singleton function
-// that will construct the static g_lob_sp the first time this function is
-// called.
+static constexpr Log::Category g_categories[] = {
+  {{"api"}, {"log API calls and return values"}, LIBLLDB_LOG_API},
+  {{"break"}, {"log breakpoints"}, LIBLLDB_LOG_BREAKPOINTS},
+  {{"commands"}, {"log command argument parsing"}, LIBLLDB_LOG_COMMANDS},
+  {{"comm"}, {"log communication activities"}, LIBLLDB_LOG_COMMUNICATION},
+  {{"conn"}, {"log connection details"}, LIBLLDB_LOG_CONNECTION},
+  {{"demangle"}, {"log mangled names to catch demangler crashes"}, LIBLLDB_LOG_DEMANGLE},
+  {{"dyld"}, {"log shared library related activities"}, LIBLLDB_LOG_DYNAMIC_LOADER},
+  {{"event"}, {"log broadcaster, listener and event queue activities"}, LIBLLDB_LOG_EVENTS},
+  {{"expr"}, {"log expressions"}, LIBLLDB_LOG_EXPRESSIONS},
+  {{"formatters"}, {"log data formatters related activities"}, LIBLLDB_LOG_DATAFORMATTERS},
+  {{"host"}, {"log host activities"}, LIBLLDB_LOG_HOST},
+  {{"jit"}, {"log JIT events in the target"}, LIBLLDB_LOG_JIT_LOADER},
+  {{"language"}, {"log language runtime events"}, LIBLLDB_LOG_LANGUAGE},
+  {{"mmap"}, {"log mmap related activities"}, LIBLLDB_LOG_MMAP},
+  {{"module"}, {"log module activities such as when modules are created, destroyed, replaced, and more"}, LIBLLDB_LOG_MODULES},
+  {{"object"}, {"log object construction/destruction for important objects"}, LIBLLDB_LOG_OBJECT},
+  {{"os"}, {"log OperatingSystem plugin related activities"}, LIBLLDB_LOG_OS},
+  {{"platform"}, {"log platform events and activities"}, LIBLLDB_LOG_PLATFORM},
+  {{"process"}, {"log process events and activities"}, LIBLLDB_LOG_PROCESS},
+  {{"script"}, {"log events about the script interpreter"}, LIBLLDB_LOG_SCRIPT},
+  {{"state"}, {"log private and public process state changes"}, LIBLLDB_LOG_STATE},
+  {{"step"}, {"log step related activities"}, LIBLLDB_LOG_STEP},
+  {{"symbol"}, {"log symbol related issues and warnings"}, LIBLLDB_LOG_SYMBOLS},
+  {{"system-runtime"}, {"log system runtime events"}, LIBLLDB_LOG_SYSTEM_RUNTIME},
+  {{"target"}, {"log target events and activities"}, LIBLLDB_LOG_TARGET},
+  {{"thread"}, {"log thread events and activities"}, LIBLLDB_LOG_THREAD},
+  {{"types"}, {"log type system related activities"}, LIBLLDB_LOG_TYPES},
+  {{"unwind"}, {"log stack unwind activities"}, LIBLLDB_LOG_UNWIND},
+  {{"watch"}, {"log watchpoint related activities"}, LIBLLDB_LOG_WATCHPOINTS},
+};
 
-static std::atomic<bool> g_log_enabled{false};
-static Log *g_log = nullptr;
+static Log::Channel g_log_channel(g_categories, LIBLLDB_LOG_DEFAULT);
 
-static Log *GetLog() {
-  if (!g_log_enabled)
-    return nullptr;
-  return g_log;
-}
-
-uint32_t lldb_private::GetLogMask() {
-  Log *log(GetLog());
-  if (log)
-    return log->GetMask().Get();
-  return 0;
+void lldb_private::InitializeLog() {
+  Log::Register("lldb", g_log_channel);
 }
 
 Log *lldb_private::GetLogIfAllCategoriesSet(uint32_t mask) {
-  Log *log(GetLog());
-  if (log && mask) {
-    uint32_t log_mask = log->GetMask().Get();
-    if ((log_mask & mask) != mask)
-      return nullptr;
-  }
-  return log;
-}
-
-void lldb_private::LogIfAllCategoriesSet(uint32_t mask, const char *format,
-                                         ...) {
-  Log *log(GetLogIfAllCategoriesSet(mask));
-  if (log) {
-    va_list args;
-    va_start(args, format);
-    log->VAPrintf(format, args);
-    va_end(args);
-  }
-}
-
-void lldb_private::LogIfAnyCategoriesSet(uint32_t mask, const char *format,
-                                         ...) {
-  Log *log(GetLogIfAnyCategoriesSet(mask));
-  if (log != nullptr) {
-    va_list args;
-    va_start(args, format);
-    log->VAPrintf(format, args);
-    va_end(args);
-  }
+  return g_log_channel.GetLogIfAll(mask);
 }
 
 Log *lldb_private::GetLogIfAnyCategoriesSet(uint32_t mask) {
-  Log *log(GetLog());
-  if (log != nullptr && mask && (mask & log->GetMask().Get()))
-    return log;
-  return nullptr;
+  return g_log_channel.GetLogIfAny(mask);
 }
 
-void lldb_private::DisableLog(const char **categories, Stream *feedback_strm) {
-  Log *log(GetLog());
 
-  if (log != nullptr) {
-    uint32_t flag_bits = 0;
-    if (categories && categories[0]) {
-      flag_bits = log->GetMask().Get();
-      for (size_t i = 0; categories[i] != nullptr; ++i) {
-        const char *arg = categories[i];
-
-        if (0 == ::strcasecmp(arg, "all"))
-          flag_bits &= ~LIBLLDB_LOG_ALL;
-        else if (0 == ::strcasecmp(arg, "api"))
-          flag_bits &= ~LIBLLDB_LOG_API;
-        else if (0 == ::strncasecmp(arg, "break", 5))
-          flag_bits &= ~LIBLLDB_LOG_BREAKPOINTS;
-        else if (0 == ::strcasecmp(arg, "commands"))
-          flag_bits &= ~LIBLLDB_LOG_COMMANDS;
-        else if (0 == ::strcasecmp(arg, "default"))
-          flag_bits &= ~LIBLLDB_LOG_DEFAULT;
-        else if (0 == ::strcasecmp(arg, "dyld"))
-          flag_bits &= ~LIBLLDB_LOG_DYNAMIC_LOADER;
-        else if (0 == ::strncasecmp(arg, "event", 5))
-          flag_bits &= ~LIBLLDB_LOG_EVENTS;
-        else if (0 == ::strncasecmp(arg, "expr", 4))
-          flag_bits &= ~LIBLLDB_LOG_EXPRESSIONS;
-        else if (0 == ::strncasecmp(arg, "object", 6))
-          flag_bits &= ~LIBLLDB_LOG_OBJECT;
-        else if (0 == ::strcasecmp(arg, "process"))
-          flag_bits &= ~LIBLLDB_LOG_PROCESS;
-        else if (0 == ::strcasecmp(arg, "platform"))
-          flag_bits &= ~LIBLLDB_LOG_PLATFORM;
-        else if (0 == ::strcasecmp(arg, "script"))
-          flag_bits &= ~LIBLLDB_LOG_SCRIPT;
-        else if (0 == ::strcasecmp(arg, "state"))
-          flag_bits &= ~LIBLLDB_LOG_STATE;
-        else if (0 == ::strcasecmp(arg, "step"))
-          flag_bits &= ~LIBLLDB_LOG_STEP;
-        else if (0 == ::strcasecmp(arg, "thread"))
-          flag_bits &= ~LIBLLDB_LOG_THREAD;
-        else if (0 == ::strcasecmp(arg, "target"))
-          flag_bits &= ~LIBLLDB_LOG_TARGET;
-        else if (0 == ::strncasecmp(arg, "watch", 5))
-          flag_bits &= ~LIBLLDB_LOG_WATCHPOINTS;
-        else if (0 == ::strncasecmp(arg, "temp", 4))
-          flag_bits &= ~LIBLLDB_LOG_TEMPORARY;
-        else if (0 == ::strncasecmp(arg, "comm", 4))
-          flag_bits &= ~LIBLLDB_LOG_COMMUNICATION;
-        else if (0 == ::strncasecmp(arg, "conn", 4))
-          flag_bits &= ~LIBLLDB_LOG_CONNECTION;
-        else if (0 == ::strncasecmp(arg, "host", 4))
-          flag_bits &= ~LIBLLDB_LOG_HOST;
-        else if (0 == ::strncasecmp(arg, "unwind", 6))
-          flag_bits &= ~LIBLLDB_LOG_UNWIND;
-        else if (0 == ::strncasecmp(arg, "types", 5))
-          flag_bits &= ~LIBLLDB_LOG_TYPES;
-        else if (0 == ::strncasecmp(arg, "symbol", 6))
-          flag_bits &= ~LIBLLDB_LOG_SYMBOLS;
-        else if (0 == ::strcasecmp(arg, "system-runtime"))
-          flag_bits &= ~LIBLLDB_LOG_SYSTEM_RUNTIME;
-        else if (0 == ::strncasecmp(arg, "module", 6))
-          flag_bits &= ~LIBLLDB_LOG_MODULES;
-        else if (0 == ::strncasecmp(arg, "mmap", 4))
-          flag_bits &= ~LIBLLDB_LOG_MMAP;
-        else if (0 == ::strcasecmp(arg, "os"))
-          flag_bits &= ~LIBLLDB_LOG_OS;
-        else if (0 == ::strcasecmp(arg, "jit"))
-          flag_bits &= ~LIBLLDB_LOG_JIT_LOADER;
-        else if (0 == ::strcasecmp(arg, "language"))
-          flag_bits &= ~LIBLLDB_LOG_LANGUAGE;
-        else if (0 == ::strncasecmp(arg, "formatters", 10))
-          flag_bits &= ~LIBLLDB_LOG_DATAFORMATTERS;
-        else if (0 == ::strncasecmp(arg, "demangle", 8))
-          flag_bits &= ~LIBLLDB_LOG_DEMANGLE;
-        else {
-          feedback_strm->Printf("error:  unrecognized log category '%s'\n",
-                                arg);
-          ListLogCategories(feedback_strm);
-          return;
-        }
-      }
-    }
-    log->GetMask().Reset(flag_bits);
-    if (flag_bits == 0) {
-      log->SetStream(nullptr);
-      g_log_enabled = false;
-    }
+void lldb_private::LogIfAnyCategoriesSet(uint32_t mask, const char *format, ...) {
+  if (Log *log = GetLogIfAnyCategoriesSet(mask)) {
+    va_list args;
+    va_start(args, format);
+    log->VAPrintf(format, args);
+    va_end(args);
   }
 }
-
-Log *lldb_private::EnableLog(
-    const std::shared_ptr<llvm::raw_ostream> &log_stream_sp,
-    uint32_t log_options, const char **categories, Stream *feedback_strm) {
-  // Try see if there already is a log - that way we can reuse its settings.
-  // We could reuse the log in toto, but we don't know that the stream is the
-  // same.
-  uint32_t flag_bits;
-  if (g_log != nullptr)
-    flag_bits = g_log->GetMask().Get();
-  else
-    flag_bits = 0;
-
-  // Now make a new log with this stream if one was provided
-  if (log_stream_sp) {
-    if (g_log != nullptr)
-      g_log->SetStream(log_stream_sp);
-    else
-      g_log = new Log(log_stream_sp);
-  }
-
-  if (g_log != nullptr) {
-    for (size_t i = 0; categories[i] != nullptr; ++i) {
-      const char *arg = categories[i];
-
-      if (0 == ::strcasecmp(arg, "all"))
-        flag_bits |= LIBLLDB_LOG_ALL;
-      else if (0 == ::strcasecmp(arg, "api"))
-        flag_bits |= LIBLLDB_LOG_API;
-      else if (0 == ::strncasecmp(arg, "break", 5))
-        flag_bits |= LIBLLDB_LOG_BREAKPOINTS;
-      else if (0 == ::strcasecmp(arg, "commands"))
-        flag_bits |= LIBLLDB_LOG_COMMANDS;
-      else if (0 == ::strncasecmp(arg, "commu", 5))
-        flag_bits |= LIBLLDB_LOG_COMMUNICATION;
-      else if (0 == ::strncasecmp(arg, "conn", 4))
-        flag_bits |= LIBLLDB_LOG_CONNECTION;
-      else if (0 == ::strcasecmp(arg, "default"))
-        flag_bits |= LIBLLDB_LOG_DEFAULT;
-      else if (0 == ::strcasecmp(arg, "dyld"))
-        flag_bits |= LIBLLDB_LOG_DYNAMIC_LOADER;
-      else if (0 == ::strncasecmp(arg, "event", 5))
-        flag_bits |= LIBLLDB_LOG_EVENTS;
-      else if (0 == ::strncasecmp(arg, "expr", 4))
-        flag_bits |= LIBLLDB_LOG_EXPRESSIONS;
-      else if (0 == ::strncasecmp(arg, "host", 4))
-        flag_bits |= LIBLLDB_LOG_HOST;
-      else if (0 == ::strncasecmp(arg, "mmap", 4))
-        flag_bits |= LIBLLDB_LOG_MMAP;
-      else if (0 == ::strncasecmp(arg, "module", 6))
-        flag_bits |= LIBLLDB_LOG_MODULES;
-      else if (0 == ::strncasecmp(arg, "object", 6))
-        flag_bits |= LIBLLDB_LOG_OBJECT;
-      else if (0 == ::strcasecmp(arg, "os"))
-        flag_bits |= LIBLLDB_LOG_OS;
-      else if (0 == ::strcasecmp(arg, "platform"))
-        flag_bits |= LIBLLDB_LOG_PLATFORM;
-      else if (0 == ::strcasecmp(arg, "process"))
-        flag_bits |= LIBLLDB_LOG_PROCESS;
-      else if (0 == ::strcasecmp(arg, "script"))
-        flag_bits |= LIBLLDB_LOG_SCRIPT;
-      else if (0 == ::strcasecmp(arg, "state"))
-        flag_bits |= LIBLLDB_LOG_STATE;
-      else if (0 == ::strcasecmp(arg, "step"))
-        flag_bits |= LIBLLDB_LOG_STEP;
-      else if (0 == ::strncasecmp(arg, "symbol", 6))
-        flag_bits |= LIBLLDB_LOG_SYMBOLS;
-      else if (0 == ::strcasecmp(arg, "system-runtime"))
-        flag_bits |= LIBLLDB_LOG_SYSTEM_RUNTIME;
-      else if (0 == ::strcasecmp(arg, "target"))
-        flag_bits |= LIBLLDB_LOG_TARGET;
-      else if (0 == ::strncasecmp(arg, "temp", 4))
-        flag_bits |= LIBLLDB_LOG_TEMPORARY;
-      else if (0 == ::strcasecmp(arg, "thread"))
-        flag_bits |= LIBLLDB_LOG_THREAD;
-      else if (0 == ::strncasecmp(arg, "types", 5))
-        flag_bits |= LIBLLDB_LOG_TYPES;
-      else if (0 == ::strncasecmp(arg, "unwind", 6))
-        flag_bits |= LIBLLDB_LOG_UNWIND;
-      else if (0 == ::strncasecmp(arg, "watch", 5))
-        flag_bits |= LIBLLDB_LOG_WATCHPOINTS;
-      else if (0 == ::strcasecmp(arg, "jit"))
-        flag_bits |= LIBLLDB_LOG_JIT_LOADER;
-      else if (0 == ::strcasecmp(arg, "language"))
-        flag_bits |= LIBLLDB_LOG_LANGUAGE;
-      else if (0 == ::strncasecmp(arg, "formatters", 10))
-        flag_bits |= LIBLLDB_LOG_DATAFORMATTERS;
-      else if (0 == ::strncasecmp(arg, "demangle", 8))
-        flag_bits |= LIBLLDB_LOG_DEMANGLE;
-      else {
-        feedback_strm->Printf("error: unrecognized log category '%s'\n", arg);
-        ListLogCategories(feedback_strm);
-        return g_log;
-      }
-    }
-
-    g_log->GetMask().Reset(flag_bits);
-    g_log->GetOptions().Reset(log_options);
-  }
-  g_log_enabled = true;
-  return g_log;
-}
-
-void lldb_private::ListLogCategories(Stream *strm) {
-  strm->Printf(
-      "Logging categories for 'lldb':\n"
-      "  all - turn on all available logging categories\n"
-      "  api - enable logging of API calls and return values\n"
-      "  break - log breakpoints\n"
-      "  commands - log command argument parsing\n"
-      "  communication - log communication activities\n"
-      "  connection - log connection details\n"
-      "  default - enable the default set of logging categories for liblldb\n"
-      "  demangle - log mangled names to catch demangler crashes\n"
-      "  dyld - log shared library related activities\n"
-      "  events - log broadcaster, listener and event queue activities\n"
-      "  expr - log expressions\n"
-      "  formatters - log data formatters related activities\n"
-      "  host - log host activities\n"
-      "  jit - log JIT events in the target\n"
-      "  language - log language runtime events\n"
-      "  mmap - log mmap related activities\n"
-      "  module - log module activities such as when modules are created, "
-      "destroyed, replaced, and more\n"
-      "  object - log object construction/destruction for important objects\n"
-      "  os - log OperatingSystem plugin related activities\n"
-      "  platform - log platform events and activities\n"
-      "  process - log process events and activities\n"
-      "  script - log events about the script interpreter\n"
-      "  state - log private and public process state changes\n"
-      "  step - log step related activities\n"
-      "  symbol - log symbol related issues and warnings\n"
-      "  system-runtime - log system runtime events\n"
-      "  target - log target events and activities\n"
-      "  thread - log thread events and activities\n"
-      "  types - log type system related activities\n"
-      "  unwind - log stack unwind activities\n"
-      "  verbose - enable verbose logging\n"
-      "  watch - log watchpoint related activities\n");
-}