os: example trace policy-modules

os/src/lib/trace/policy/null/policy.cc

@@ -0,0 +1,39 @@
+#include <trace/policy.h>
+
+using namespace Genode;
+
+size_t max_event_size()
+{
+	return 0;
+}
+
+size_t rpc_call(char *dst, char const *rpc_name, Msgbuf_base const &)
+{
+	return 0;
+}
+
+size_t rpc_returned(char *dst, char const *rpc_name, Msgbuf_base const &)
+{
+	return 0;
+}
+
+size_t rpc_dispatch(char *dst, char const *rpc_name)
+{
+	return 0;
+}
+
+size_t rpc_reply(char *dst, char const *rpc_name)
+{
+	return 0;
+}
+
+size_t signal_submit(char *dst, unsigned const)
+{
+	return 0;
+}
+
+size_t signal_receive(char *dst, Signal_context const &, unsigned)
+{
+	return 0;
+}
+

os/src/lib/trace/policy/null/target.mk

@@ -0,0 +1,5 @@
+TARGET = null_policy
+
+TARGET_POLICY = null
+
+include $(PRG_DIR)/../policy.inc

os/src/lib/trace/policy/policy.inc

@@ -0,0 +1,35 @@
+#
+# \brief  Common build rules for creating trace-policy modules
+# \author Josef Soentgen
+# \date   2013-08-12
+#
+
+CXX_OPT = -g -ffreestanding -fPIC -fno-exceptions -fno-rtti  -nostdinc -nostdlib
+
+LD_SCRIPT= $(PRG_DIR)/../policy.ld
+
+-include *.d
+-include ../*.d
+
+LIBS = platform
+
+%.o : %.cc
+	$(MSG_COMP)$@
+	$(VERBOSE)$(CXX) -c $(CC_MARCH) $(CXX_OPT) $(INCLUDES) $< -o $@
+
+$(TARGET_POLICY).elf: table.o policy.o
+	$(MSG_LINK)$@
+	$(VERBOSE)$(LD) $(LD_MARCH) -T $(LD_SCRIPT) -Ttext=0 $^ -o $@
+
+$(INSTALL_DIR)/$(TARGET_POLICY): $(TARGET_POLICY).elf
+	$(VERBOSE)$(OBJCOPY) -O binary $< $@
+
+$(TARGET): $(INSTALL_DIR)/$(TARGET_POLICY)
+
+clean cleanall: clean_policy
+
+clean_policy:
+	$(VERBOSE)$(RM) ../*.o ../*.d *.o *.d $(TARGET_POLICY).elf \
+		$(BUILD_BASE_DIR)/bin/$(TARGET_POLICY)
+
+vpath table.cc $(REP_DIR)/src/lib/trace/policy

os/src/lib/trace/policy/policy.ld

@@ -0,0 +1,11 @@
+PHDRS { rw PT_LOAD; }
+SECTIONS {
+
+	.text : {
+		*(.data)  /* must be first because it contains policy module header */
+		*(.text .text.*)
+		*(.bss)
+	} : rw
+
+	/DISCARD/ : { *(.*) }
+}

os/src/lib/trace/policy/rpc_name/policy.cc

@@ -0,0 +1,53 @@
+#include <util/string.h>
+#include <trace/policy.h>
+
+using namespace Genode;
+
+enum { MAX_EVENT_SIZE = 64 };
+
+size_t max_event_size()
+{
+	return MAX_EVENT_SIZE;
+}
+
+size_t rpc_call(char *dst, char const *rpc_name, Msgbuf_base const &)
+{
+	size_t len = strlen(rpc_name);
+
+	memcpy(dst, (void*)rpc_name, len);
+	return len;
+}
+
+size_t rpc_returned(char *dst, char const *rpc_name, Msgbuf_base const &)
+{
+	size_t len = strlen(rpc_name);
+
+	memcpy(dst, (void*)rpc_name, len);
+	return len;
+}
+
+size_t rpc_dispatch(char *dst, char const *rpc_name)
+{
+	size_t len = strlen(rpc_name);
+
+	memcpy(dst, (void*)rpc_name, len);
+	return len;
+}
+
+size_t rpc_reply(char *dst, char const *rpc_name)
+{
+	size_t len = strlen(rpc_name);
+
+	memcpy(dst, (void*)rpc_name, len);
+	return len;
+}
+
+size_t signal_submit(char *dst, unsigned const)
+{
+	return 0;
+}
+
+size_t signal_receive(char *dst, Signal_context const &, unsigned)
+{
+	return 0;
+}

os/src/lib/trace/policy/rpc_name/target.mk

@@ -0,0 +1,5 @@
+TARGET = rpc_name_policy
+
+TARGET_POLICY = rpc_name
+
+include $(PRG_DIR)/../policy.inc

os/src/lib/trace/policy/table.cc

@@ -0,0 +1,29 @@
+/*
+ * \brief  Header of tracing policy module
+ * \author Norman Feske
+ * \date   2013-08-15
+ */
+
+/*
+ * Copyright (C) 2013 Genode Labs GmbH
+ *
+ * This file is part of the Genode OS framework, which is distributed
+ * under the terms of the GNU General Public License version 2.
+ */
+
+#include <trace/policy.h>
+#include <base/trace/policy.h>
+
+extern "C" {
+
+	Genode::Trace::Policy_module policy_jump_table =
+	{
+		max_event_size,
+		rpc_call,
+		rpc_returned,
+		rpc_dispatch,
+		rpc_reply,
+		signal_submit,
+		signal_receive
+	};
+}