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9d67f9fc8e
This patch removes old 'Allocator_guard' utility and replaces its use with the modern 'Constrained_ram_allocator'. The adjustment of core in this respect has the side effect of a more accurate capability accounting in core's CPU, TRACE, and RM services. In particular, the dataspace capabilities needed for core-internal allocations via the 'Sliced_heap' are accounted to the client now. The same goes for nitpicker and nic_dump as other former users of the allocator guard. Hence, the patch also touches code at the client and server sides related to these services. The only remaining user of the 'Allocator_guard' is the Intel GPU driver. As the adaptation of this component would be too invasive without testing, this patch leaves this component unchanged by keeping a copy of the 'allocator_guard.h' locally at the component. Fixes #3750
74 lines
1.9 KiB
C++
74 lines
1.9 KiB
C++
/*
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* \brief Connection to TRACE service
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* \author Norman Feske
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* \date 2013-08-11
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*/
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/*
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* Copyright (C) 2013-2017 Genode Labs GmbH
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*
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* This file is part of the Genode OS framework, which is distributed
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* under the terms of the GNU Affero General Public License version 3.
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*/
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#ifndef _INCLUDE__TRACE_SESSION__CONNECTION_H_
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#define _INCLUDE__TRACE_SESSION__CONNECTION_H_
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#include <util/retry.h>
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#include <trace_session/client.h>
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#include <base/connection.h>
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namespace Genode { namespace Trace { struct Connection; } }
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struct Genode::Trace::Connection : Genode::Connection<Genode::Trace::Session>,
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Genode::Trace::Session_client
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{
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template <typename FUNC>
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auto _retry(FUNC func) -> decltype(func())
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{
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return retry_with_upgrade(Ram_quota{8*1024}, Cap_quota{2}, func);
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}
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/**
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* Constructor
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*
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* \param ram_quota RAM donated for tracing purposes
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* \param arg_buffer_size session argument-buffer size
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* \param parent_levels number of parent levels to trace
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*/
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Connection(Env &env, size_t ram_quota, size_t arg_buffer_size, unsigned parent_levels)
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:
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Genode::Connection<Session>(env,
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session(env.parent(), "ram_quota=%lu, arg_buffer_size=%lu, parent_levels=%u",
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ram_quota + 10*1024, arg_buffer_size, parent_levels)),
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Session_client(env.rm(), cap())
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{ }
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Policy_id alloc_policy(size_t size) override
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{
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return _retry([&] () {
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return Session_client::alloc_policy(size); });
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}
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void trace(Subject_id s, Policy_id p, size_t buffer_size) override
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{
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_retry([&] () { Session_client::trace(s, p, buffer_size); });
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}
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size_t subjects(Subject_id *dst, size_t dst_len) override
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{
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return _retry([&] () {
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return Session_client::subjects(dst, dst_len); });
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}
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template <typename FN>
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size_t for_each_subject_info(FN const &fn)
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{
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return _retry([&] () {
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return Session_client::for_each_subject_info(fn); });
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}
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};
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#endif /* _INCLUDE__TRACE_SESSION__CONNECTION_H_ */
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