Added optional kernel tracing for sending BMessages. Currently only the

destination of the message and it's "what" field are stored. It might be
nice to also get some info about its fields -- maybe as an additional
option.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@23810 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/kits/app/Message.cpp

@@ -32,11 +32,20 @@
 #include <stdlib.h>
 #include <string.h>
 
+#include <tracing_config.h>
+	// kernel tracing configuration
 
 #define DEBUG_FUNCTION_ENTER	//debug_printf("thread: 0x%x; this: 0x%08x; header: 0x%08x; fields: 0x%08x; data: 0x%08x; line: %04ld; func: %s\n", find_thread(NULL), this, fHeader, fFields, fData, __LINE__, __PRETTY_FUNCTION__);
 #define DEBUG_FUNCTION_ENTER2	//debug_printf("thread: 0x%x;                                                                             line: %04ld: func: %s\n", find_thread(NULL), __LINE__, __PRETTY_FUNCTION__);
 
 
+#ifdef BMESSAGE_TRACING
+#	define KTRACE(format...)	ktrace_printf(format)
+#else
+#	define KTRACE(format...)
+#endif
+
+
 const char *B_SPECIFIER_ENTRY = "specifiers";
 const char *B_PROPERTY_ENTRY = "property";
 const char *B_PROPERTY_NAME_ENTRY = "name";
@@ -1911,6 +1920,10 @@ BMessage::_SendMessage(port_id port, team_id portOwner, int32 token,
 	header->flags |= MESSAGE_FLAG_WAS_DELIVERED;
 
 	if (direct != NULL) {
+		KTRACE("BMessage send direct: port: %ld, token: %ld, "
+			"message: '%c%c%c%c'", port, token,
+			char(what >> 24), char(what >> 16), char(what >> 8), (char)what);
+
 		// this is a local message transmission
 		direct->AddMessage(copy);
 
@@ -1921,6 +1934,10 @@ BMessage::_SendMessage(port_id port, team_id portOwner, int32 token,
 
 		direct->Release();
 	} else {
+		KTRACE("BMessage send remote: team: %ld, port: %ld, token: %ld, "
+			"message: '%c%c%c%c'", portOwner, port, token,
+			char(what >> 24), char(what >> 16), char(what >> 8), (char)what);
+
 		do {
 			result = write_port_etc(port, kPortMessageCode, (void *)buffer, size,
 				B_RELATIVE_TIMEOUT, timeout);