ehmry/genode
ehmry
/
genode
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity
genode/repos/base/src/core/include/trace/session_component.h

91 lines
2.6 KiB
C
Raw Normal View History

core: TRACE service interface and implementation
2013-08-10 03:44:55 +02:00
/*
* \brief TRACE session implementation
* \author Norman Feske
* \date 2013-08-12
*/
/*
Adjust file headers to refer to the AGPLv3
2017-02-20 13:23:52 +01:00
* Copyright (C) 2013-2017 Genode Labs GmbH
core: TRACE service interface and implementation
2013-08-10 03:44:55 +02:00
*
* This file is part of the Genode OS framework, which is distributed
Adjust file headers to refer to the AGPLv3
2017-02-20 13:23:52 +01:00
* under the terms of the GNU Affero General Public License version 3.
core: TRACE service interface and implementation
2013-08-10 03:44:55 +02:00
*/
#ifndef _CORE__INCLUDE__TRACE__SESSION_COMPONENT_H_
#define _CORE__INCLUDE__TRACE__SESSION_COMPONENT_H_
/* Genode includes */
#include <base/allocator_guard.h>
#include <base/rpc_server.h>
#include <base/tslab.h>
base: remove dependency from deprecated APIs This patch adjusts the implementation of the base library and core such that the code no longer relies on deprecated APIs except for very few cases, mainly to keep those deprecated APIs in tact for now. The most prominent changes are: - Removing the use of base/printf.h - Removing of the log backend for printf. The 'Console' with the format-string parser is still there along with 'snprintf.h' because the latter is still used at a few places, most prominently the 'Connection' classes. - Removing the notion of a RAM session, which does not exist in Genode anymore. Still the types were preserved (by typedefs to PD session) to keep up compatibility. But this transition should come to an end now. - Slight rennovation of core's tracing service, e.g., the use of an Attached_dataspace as the Argument_buffer. - Reducing the reliance on global accessors like deprecated_env() or core_env(). Still there is a longish way to go to eliminate all such calls. A useful pattern (or at least a stop-gap solution) is to pass the 'Env' to the individual compilation units via init functions. - Avoiding the use of the old 'Child_policy::resolve_session_request' interface that returned a 'Service' instead of a 'Route'. Issue #1987
2019-01-30 17:53:16 +01:00
#include <base/attached_ram_dataspace.h>
core: TRACE service interface and implementation
2013-08-10 03:44:55 +02:00
#include <trace_session/trace_session.h>
/* core-local includes */
#include <trace/subject_registry.h>
#include <trace/policy_registry.h>
namespace Genode { namespace Trace { class Session_component; } }
class Genode::Trace::Session_component
:
public Genode::Rpc_object<Genode::Trace::Session,
Genode::Trace::Session_component>,
public Genode::Trace::Policy_owner
{
private:
base: remove dependency from deprecated APIs This patch adjusts the implementation of the base library and core such that the code no longer relies on deprecated APIs except for very few cases, mainly to keep those deprecated APIs in tact for now. The most prominent changes are: - Removing the use of base/printf.h - Removing of the log backend for printf. The 'Console' with the format-string parser is still there along with 'snprintf.h' because the latter is still used at a few places, most prominently the 'Connection' classes. - Removing the notion of a RAM session, which does not exist in Genode anymore. Still the types were preserved (by typedefs to PD session) to keep up compatibility. But this transition should come to an end now. - Slight rennovation of core's tracing service, e.g., the use of an Attached_dataspace as the Argument_buffer. - Reducing the reliance on global accessors like deprecated_env() or core_env(). Still there is a longish way to go to eliminate all such calls. A useful pattern (or at least a stop-gap solution) is to pass the 'Env' to the individual compilation units via init functions. - Avoiding the use of the old 'Child_policy::resolve_session_request' interface that returned a 'Service' instead of a 'Route'. Issue #1987
2019-01-30 17:53:16 +01:00
Ram_allocator &_ram;
Region_map &_local_rm;
core: use proper size in Trace-Policies Tslab Issue #2260.
2017-01-30 11:07:58 +01:00
Allocator_guard _md_alloc;
Tslab<Trace::Subject, 4096> _subjects_slab;
Tslab<Trace::Policy, 4096> _policies_slab;
base/core: use references instead of pointers This patch replaces the former prominent use of pointers by references wherever feasible. This has the following benefits: * The contract between caller and callee becomes more obvious. When passing a reference, the contract says that the argument cannot be a null pointer. The caller is responsible to ensure that. Therefore, the use of reference eliminates the need to add defensive null-pointer checks at the callee site, which sometimes merely exist to be on the safe side. The bottom line is that the code becomes easier to follow. * Reference members must be initialized via an object initializer, which promotes a programming style that avoids intermediate object- construction states. Within core, there are still a few pointers as member variables left though. E.g., caused by the late association of 'Platform_thread' objects with their 'Platform_pd' objects. * If no pointers are present as member variables, we don't need to manually provide declarations of a private copy constructor and an assignment operator to avoid -Weffc++ errors "class ... has pointer data members [-Werror=effc++]". This patch also changes a few system bindings on NOVA and Fiasco.OC, e.g., the return value of the global 'cap_map' accessor has become a reference. Hence, the patch touches a few places outside of core. Fixes #3135
2019-01-24 22:00:01 +01:00
unsigned const _parent_levels;
Session_label const _label;
core: use proper size in Trace-Policies Tslab Issue #2260.
2017-01-30 11:07:58 +01:00
Source_registry &_sources;
Policy_registry &_policies;
Subject_registry _subjects;
Follow practices suggested by "Effective C++" The patch adjust the code of the base, base-<kernel>, and os repository. To adapt existing components to fix violations of the best practices suggested by "Effective C++" as reported by the -Weffc++ compiler argument. The changes follow the patterns outlined below: * A class with virtual functions can no longer publicly inherit base classed without a vtable. The inherited object may either be moved to a member variable, or inherited privately. The latter would be used for classes that inherit 'List::Element' or 'Avl_node'. In order to enable the 'List' and 'Avl_tree' to access the meta data, the 'List' must become a friend. * Instead of adding a virtual destructor to abstract base classes, we inherit the new 'Interface' class, which contains a virtual destructor. This way, single-line abstract base classes can stay as compact as they are now. The 'Interface' utility resides in base/include/util/interface.h. * With the new warnings enabled, all member variables must be explicitly initialized. Basic types may be initialized with '='. All other types are initialized with braces '{ ... }' or as class initializers. If basic types and non-basic types appear in a row, it is nice to only use the brace syntax (also for basic types) and align the braces. * If a class contains pointers as members, it must now also provide a copy constructor and assignment operator. In the most cases, one would make them private, effectively disallowing the objects to be copied. Unfortunately, this warning cannot be fixed be inheriting our existing 'Noncopyable' class (the compiler fails to detect that the inheriting class cannot be copied and still gives the error). For now, we have to manually add declarations for both the copy constructor and assignment operator as private class members. Those declarations should be prepended with a comment like this: /* * Noncopyable */ Thread(Thread const &); Thread &operator = (Thread const &); In the future, we should revisit these places and try to replace the pointers with references. In the presence of at least one reference member, the compiler would no longer implicitly generate a copy constructor. So we could remove the manual declaration. Issue #465
2017-12-21 15:42:15 +01:00
unsigned _policy_cnt { 0 };
base: remove dependency from deprecated APIs This patch adjusts the implementation of the base library and core such that the code no longer relies on deprecated APIs except for very few cases, mainly to keep those deprecated APIs in tact for now. The most prominent changes are: - Removing the use of base/printf.h - Removing of the log backend for printf. The 'Console' with the format-string parser is still there along with 'snprintf.h' because the latter is still used at a few places, most prominently the 'Connection' classes. - Removing the notion of a RAM session, which does not exist in Genode anymore. Still the types were preserved (by typedefs to PD session) to keep up compatibility. But this transition should come to an end now. - Slight rennovation of core's tracing service, e.g., the use of an Attached_dataspace as the Argument_buffer. - Reducing the reliance on global accessors like deprecated_env() or core_env(). Still there is a longish way to go to eliminate all such calls. A useful pattern (or at least a stop-gap solution) is to pass the 'Env' to the individual compilation units via init functions. - Avoiding the use of the old 'Child_policy::resolve_session_request' interface that returned a 'Service' instead of a 'Route'. Issue #1987
2019-01-30 17:53:16 +01:00
Attached_ram_dataspace _argument_buffer;
core: TRACE service interface and implementation
2013-08-10 03:44:55 +02:00
public:
/**
* Constructor
*/
base: remove dependency from deprecated APIs This patch adjusts the implementation of the base library and core such that the code no longer relies on deprecated APIs except for very few cases, mainly to keep those deprecated APIs in tact for now. The most prominent changes are: - Removing the use of base/printf.h - Removing of the log backend for printf. The 'Console' with the format-string parser is still there along with 'snprintf.h' because the latter is still used at a few places, most prominently the 'Connection' classes. - Removing the notion of a RAM session, which does not exist in Genode anymore. Still the types were preserved (by typedefs to PD session) to keep up compatibility. But this transition should come to an end now. - Slight rennovation of core's tracing service, e.g., the use of an Attached_dataspace as the Argument_buffer. - Reducing the reliance on global accessors like deprecated_env() or core_env(). Still there is a longish way to go to eliminate all such calls. A useful pattern (or at least a stop-gap solution) is to pass the 'Env' to the individual compilation units via init functions. - Avoiding the use of the old 'Child_policy::resolve_session_request' interface that returned a 'Service' instead of a 'Route'. Issue #1987
2019-01-30 17:53:16 +01:00
Session_component(Ram_allocator &ram, Region_map &local_rm,
Allocator &md_alloc, size_t ram_quota,
size_t arg_buffer_size, unsigned parent_levels,
char const *label, Source_registry &sources,
Policy_registry &policies);
core: TRACE service interface and implementation
2013-08-10 03:44:55 +02:00
~Session_component();
/**
* Register quota donation at allocator guard
*/
void upgrade_ram_quota(size_t ram_quota) { _md_alloc.upgrade(ram_quota); }
/***********************
** Session interface **
***********************/
Dataspace_capability dataspace();
size_t subjects();
Add missing override annotations Issue #3159
2019-02-14 22:39:08 +01:00
Policy_id alloc_policy(size_t) override;
Dataspace_capability policy(Policy_id) override;
void unload_policy(Policy_id) override;
void trace(Subject_id, Policy_id, size_t) override;
void rule(Session_label const &, Thread_name const &, Policy_id, size_t) override;
void pause(Subject_id) override;
void resume(Subject_id) override;
Subject_info subject_info(Subject_id) override;
Dataspace_capability buffer(Subject_id) override;
void free(Subject_id) override;
core: TRACE service interface and implementation
2013-08-10 03:44:55 +02:00
};
#endif /* _CORE__INCLUDE__TRACE__SESSION_COMPONENT_H_ */