b49e588c1c
This patch replaces the former 'Pd_session::bind_thread' function by a PD-capability argument of the 'Cpu_session::create_thread' function, and removes the ancient thread-start protocol via 'Rm_session::add_client' and 'Cpu_session::set_pager'. Threads are now bound to PDs at their creation time and implicitly paged according to the address space of the PD. Note the API change: This patch changes the signature of the 'Child' and 'Process' constructors. There is a new 'address_space' argument, which represents the region map representing the child's address space. It is supplied separately to the PD session capability (which principally can be invoked to obtain the PD's address space) to allow the population of the address space without relying on an 'Pd_session::address_space' RPC call. Furthermore, a new (optional) env_pd argument allows the explicit overriding of the PD capability handed out to the child as part of its environment. It can be used to intercept the interaction of the child with its PD session at core. This is used by Noux. Issue #1938
249 lines
5.8 KiB
C++
249 lines
5.8 KiB
C++
/*
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* \brief Implementation of the CPU session interface
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* \author Christian Prochaska
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* \date 2011-04-28
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*/
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/*
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* Copyright (C) 2011-2013 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 General Public License version 2.
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*/
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/* Genode includes */
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#include <base/env.h>
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#include <base/printf.h>
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#include <cpu_session_component.h>
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#include <util/list.h>
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/* GDB monitor includes */
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#include "config.h"
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extern void genode_add_thread(unsigned long lwpid);
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extern void genode_remove_thread(unsigned long lwpid);
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using namespace Genode;
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using namespace Gdb_monitor;
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/* FIXME: use an allocator */
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static unsigned long new_lwpid = GENODE_LWP_BASE;
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Thread_info *Cpu_session_component::_thread_info(Thread_capability thread_cap)
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{
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Thread_info *thread_info = _thread_list.first();
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while (thread_info) {
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if (thread_info->thread_cap().local_name() == thread_cap.local_name()) {
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return thread_info;
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break;
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}
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thread_info = thread_info->next();
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}
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return 0;
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}
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unsigned long Cpu_session_component::lwpid(Thread_capability thread_cap)
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{
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return _thread_info(thread_cap)->lwpid();
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}
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Thread_capability Cpu_session_component::thread_cap(unsigned long lwpid)
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{
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Thread_info *thread_info = _thread_list.first();
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while (thread_info) {
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if (thread_info->lwpid() == lwpid) {
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return thread_info->thread_cap();
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}
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thread_info = thread_info->next();
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}
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return Thread_capability();
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}
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Thread_capability
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Cpu_session_component::create_thread(Capability<Pd_session> pd, size_t weight,
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Name const &name, Affinity::Location location,
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addr_t utcb)
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{
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Thread_capability thread_cap =
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_parent_cpu_session.create_thread(pd, weight, name.string(), location, utcb);
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if (thread_cap.valid()) {
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Thread_info *thread_info = new (env()->heap()) Thread_info(thread_cap, new_lwpid++);
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_thread_list.append(thread_info);
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}
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return thread_cap;
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}
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Ram_dataspace_capability Cpu_session_component::utcb(Thread_capability thread)
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{
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return _parent_cpu_session.utcb(thread);
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}
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void Cpu_session_component::kill_thread(Thread_capability thread_cap)
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{
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Thread_info *thread_info = _thread_info(thread_cap);
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if (thread_info) {
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_exception_signal_receiver->dissolve(thread_info);
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genode_remove_thread(thread_info->lwpid());
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_thread_list.remove(thread_info);
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destroy(env()->heap(), thread_info);
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}
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_parent_cpu_session.kill_thread(thread_cap);
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}
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Thread_capability Cpu_session_component::first()
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{
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Thread_info *thread_info = _thread_list.first();
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if (thread_info)
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return thread_info->thread_cap();
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else
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return Thread_capability();
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}
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Thread_capability Cpu_session_component::next(Thread_capability thread_cap)
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{
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Thread_info *next_thread_info = _thread_info(thread_cap)->next();
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if (next_thread_info)
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return next_thread_info->thread_cap();
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else
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return Thread_capability();
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}
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int Cpu_session_component::start(Thread_capability thread_cap,
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addr_t ip, addr_t sp)
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{
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Thread_info *thread_info = _thread_info(thread_cap);
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if (thread_info)
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exception_handler(thread_cap, _exception_signal_receiver->manage(thread_info));
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int result = _parent_cpu_session.start(thread_cap, ip, sp);
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if (thread_info) {
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/* pause the first thread */
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if (thread_info->lwpid() == GENODE_LWP_BASE)
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pause(thread_cap);
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genode_add_thread(thread_info->lwpid());
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}
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return result;
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}
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void Cpu_session_component::pause(Thread_capability thread_cap)
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{
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_parent_cpu_session.pause(thread_cap);
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}
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void Cpu_session_component::resume(Thread_capability thread_cap)
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{
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_parent_cpu_session.resume(thread_cap);
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}
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void Cpu_session_component::cancel_blocking(Thread_capability thread_cap)
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{
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_parent_cpu_session.cancel_blocking(thread_cap);
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}
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void Cpu_session_component::state(Thread_capability thread_cap,
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Thread_state const &state)
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{
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_parent_cpu_session.state(thread_cap, state);
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}
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Thread_state Cpu_session_component::state(Thread_capability thread_cap)
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{
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return _parent_cpu_session.state(thread_cap);
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}
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void Cpu_session_component::exception_handler(Thread_capability thread_cap,
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Signal_context_capability sigh_cap)
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{
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_parent_cpu_session.exception_handler(thread_cap, sigh_cap);
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}
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void Cpu_session_component::single_step(Thread_capability thread_cap, bool enable)
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{
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_parent_cpu_session.single_step(thread_cap, enable);
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}
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Affinity::Space Cpu_session_component::affinity_space() const
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{
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return _parent_cpu_session.affinity_space();
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}
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void Cpu_session_component::affinity(Thread_capability thread_cap,
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Affinity::Location location)
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{
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_parent_cpu_session.affinity(thread_cap, location);
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}
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Dataspace_capability Cpu_session_component::trace_control()
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{
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return _parent_cpu_session.trace_control();
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}
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unsigned Cpu_session_component::trace_control_index(Thread_capability thread)
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{
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return _parent_cpu_session.trace_control_index(thread);
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}
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Dataspace_capability Cpu_session_component::trace_buffer(Thread_capability thread)
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{
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return _parent_cpu_session.trace_buffer(thread);
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}
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Dataspace_capability Cpu_session_component::trace_policy(Thread_capability thread)
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{
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return _parent_cpu_session.trace_policy(thread);
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}
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Capability<Cpu_session::Native_cpu> Cpu_session_component::native_cpu()
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{
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return _parent_cpu_session.native_cpu();
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}
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Cpu_session_component::Cpu_session_component(Signal_receiver *exception_signal_receiver, const char *args)
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: _parent_cpu_session(env()->parent()->session<Cpu_session>(args)),
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_exception_signal_receiver(exception_signal_receiver)
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{
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}
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Cpu_session_component::~Cpu_session_component()
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{
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}
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int Cpu_session_component::ref_account(Cpu_session_capability) { return -1; }
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int Cpu_session_component::transfer_quota(Cpu_session_capability, size_t) { return -1; }
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Cpu_session::Quota Cpu_session_component::quota() { return Quota(); }
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