From 90e3bbf0cb1b904a7e0edd46e880aa26b245a1c6 Mon Sep 17 00:00:00 2001
From: Ingo Weinhold <ingo_weinhold@gmx.de>
Date: Fri, 1 Feb 2008 12:35:00 +0000
Subject: [PATCH] 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
---
 headers/private/kernel/tracing_config.h |  3 ++-
 src/kits/app/Message.cpp                | 17 +++++++++++++++++
 2 files changed, 19 insertions(+), 1 deletion(-)

diff --git a/headers/private/kernel/tracing_config.h b/headers/private/kernel/tracing_config.h
index c54df839a8..eab4a86c18 100644
--- a/headers/private/kernel/tracing_config.h
+++ b/headers/private/kernel/tracing_config.h
@@ -10,7 +10,7 @@
 
 // tracing buffer size (in bytes)
 #ifndef MAX_TRACE_SIZE
-#	define MAX_TRACE_SIZE 1024 * 1024
+#	define MAX_TRACE_SIZE (1024 * 1024)
 #endif
 
 
@@ -20,5 +20,6 @@
 //#define SIGNAL_TRACING
 //#define SYSCALL_TRACING
 //#define TEAM_TRACING
+//#define BMESSAGE_TRACING
 
 #endif	// KERNEL_TRACING_CONFIG_H
diff --git a/src/kits/app/Message.cpp b/src/kits/app/Message.cpp
index 137aa69f14..8f04394afa 100644
--- a/src/kits/app/Message.cpp
+++ b/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);