AK+Format: Add dmesgln() to replace klog().

AK/Format.cpp

@@ -666,8 +666,7 @@ void vdbgln(StringView fmtstr, TypeErasedFormatParams params)
 
     StringBuilder builder;
 
-// FIXME: This logic is redundant with the stuff in LogStream.cpp.
-#if defined(__serenity__)
+#ifdef __serenity__
 #    ifdef KERNEL
     if (Kernel::Processor::is_initialized() && Kernel::Thread::current()) {
         auto& thread = *Kernel::Thread::current();
@@ -695,10 +694,31 @@ void vdbgln(StringView fmtstr, TypeErasedFormatParams params)
 
     const auto string = builder.string_view();
 
-    const auto retval = dbgputstr(string.characters_without_null_termination(), string.length());
-    ASSERT(retval == 0);
+    dbgputstr(string.characters_without_null_termination(), string.length());
 }
 
+#ifdef KERNEL
+void vdmesgln(StringView fmtstr, TypeErasedFormatParams params)
+{
+    StringBuilder builder;
+
+#    ifdef __serenity__
+    if (Kernel::Processor::is_initialized() && Kernel::Thread::current()) {
+        auto& thread = *Kernel::Thread::current();
+        builder.appendff("\033[34;1m[{}({}:{})]\033[0m: ", thread.process().name(), thread.pid().value(), thread.tid().value());
+    } else {
+        builder.appendff("\033[34;1m[Kernel]\033[0m: ");
+    }
+#    endif
+
+    vformat(builder, fmtstr, params);
+    builder.append('\n');
+
+    const auto string = builder.string_view();
+    kernelputstr(string.characters_without_null_termination(), string.length());
+}
+#endif
+
 template struct Formatter<unsigned char, void>;
 template struct Formatter<unsigned short, void>;
 template struct Formatter<unsigned int, void>;

AK/Format.h

@@ -405,6 +405,16 @@ void dbgln() { dbgln<enabled>(""); }
 
 void set_debug_enabled(bool);
 
+#ifdef KERNEL
+void vdmesgln(StringView fmtstr, TypeErasedFormatParams);
+
+template<typename... Parameters>
+void dmesgln(StringView fmtstr, const Parameters&... parameters) { vdmesgln(fmtstr, VariadicFormatParams { parameters... }); }
+template<typename... Parameters>
+void dmesgln(const char* fmtstr, const Parameters&... parameters) { vdmesgln(fmtstr, VariadicFormatParams { parameters... }); }
+inline void dmesgln() { dmesgln(""); }
+#endif
+
 template<typename T, typename = void>
 struct HasFormatter : TrueType {
 };
@@ -459,7 +469,9 @@ struct Formatter<FormatString> : Formatter<String> {
 
 } // namespace AK
 
-#ifndef KERNEL
+#ifdef KERNEL
+using AK::dmesgln;
+#else
 using AK::out;
 using AK::outln;