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core: serve parent and core service by one ep

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Fixes #2484
This commit is contained in:
Alexander Boettcher 2017-08-16 16:04:41 +02:00 committed by Christian Helmuth
parent b1a27b417b
commit c2950e13eb
6 changed files with 13 additions and 78 deletions
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10
repos/base-foc/src/core/signal_source_component.cc
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@ -71,8 +71,7 @@ Signal_source::Signal Signal_source_component::wait_for_signal()
Signal_source_component::Signal_source_component(Rpc_entrypoint *ep)
:
Signal_source_rpc_object(*cap_map()->insert(platform_specific()->cap_id_alloc()->alloc())),
_entrypoint(ep), _finalizer(*this),
_finalizer_cap(_entrypoint->manage(&_finalizer))
_entrypoint(ep)
{
using namespace Fiasco;
@ -84,13 +83,6 @@ Signal_source_component::Signal_source_component(Rpc_entrypoint *ep)
Signal_source_component::~Signal_source_component()
{
_finalizer_cap.call<Finalizer::Rpc_exit>();
_entrypoint->dissolve(&_finalizer);
}
void Signal_source_component::Finalizer_component::exit()
{
/*
* On Fiasco.OC, the signal-source client does not use a blocking call

12
repos/base-sel4/src/core/signal_source_component.cc
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@ -70,8 +70,7 @@ Signal_source::Signal Signal_source_component::wait_for_signal()
Signal_source_component::Signal_source_component(Rpc_entrypoint *ep)
:
_entrypoint(ep), _finalizer(*this),
_finalizer_cap(_entrypoint->manage(&_finalizer))
_entrypoint(ep)
{
Platform &platform = *platform_specific();
Range_allocator &phys_alloc = *platform.ram_alloc();
@ -87,11 +86,4 @@ Signal_source_component::Signal_source_component(Rpc_entrypoint *ep)
}
Signal_source_component::~Signal_source_component()
{
_finalizer_cap.call<Finalizer::Rpc_exit>();
_entrypoint->dissolve(&_finalizer);
}
void Signal_source_component::Finalizer_component::exit() { }
Signal_source_component::~Signal_source_component() { }

33
repos/base/src/core/include/signal_source_component.h
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@ -75,44 +75,11 @@ class Genode::Signal_context_component : public Rpc_object<Signal_context>,
class Genode::Signal_source_component : public Signal_source_rpc_object
{
/**
* Helper for clean destruction of signal-receiver component
*
* Normally, reply capabilities are implicitly destroyed when answering
* an RPC call. But when destructing a signal session while a signal-
* receiver client is blocking on a 'wait_for_signal' call, this
* blocking call will never return via the normal control flow
* (signal submission). In this case, the reply capability would
* outlive the signal session. To avoid the leakage of such reply
* capabilities, we let the signal-session destructor perform a
* core-local RPC call to the so-called 'Finalizer' object, which has
* the sole purpose of replying to the last outstanding
* 'wait_for_signal' call and thereby releasing the corresponding
* reply capability.
*/
struct Finalizer
{
GENODE_RPC(Rpc_exit, void, exit);
GENODE_RPC_INTERFACE(Rpc_exit);
};
struct Finalizer_component : Rpc_object<Finalizer, Finalizer_component>
{
Signal_source_component &source;
Finalizer_component(Signal_source_component &source)
: source(source) { }
void exit();
};
private:
Signal_queue _signal_queue;
Rpc_entrypoint *_entrypoint;
Native_capability _reply_cap;
Finalizer_component _finalizer;
Capability<Finalizer> _finalizer_cap;
public:

2
repos/base/src/core/include/trace/session_component.h
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@ -58,7 +58,7 @@ class Genode::Trace::Session_component
ram(ram),
ds(ram.alloc(size)),
base(env_deprecated()->rm_session()->attach(ds)),
size(ds.call<Dataspace::Rpc_size>())
size(ram.dataspace_size(ds))
{ }
~Argument_buffer()

18
repos/base/src/core/main.cc
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@ -106,12 +106,6 @@ class Core_child : public Child_policy
{
private:
/*
* Entry point used for serving the parent interface
*/
Rpc_entrypoint _entrypoint;
enum { STACK_SIZE = 4 * 1024 * sizeof(Genode::addr_t)};
Registry<Service> &_services;
Capability<Pd_session> _core_pd_cap;
@ -133,18 +127,16 @@ class Core_child : public Child_policy
Core_child(Registry<Service> &services, Region_map &local_rm,
Pd_session &core_pd, Capability<Pd_session> core_pd_cap,
Cpu_session &core_cpu, Capability<Cpu_session> core_cpu_cap,
Cap_quota cap_quota, Ram_quota ram_quota)
Cap_quota cap_quota, Ram_quota ram_quota,
Rpc_entrypoint &ep)
:
_entrypoint(nullptr, STACK_SIZE, "init_child", false),
_services(services),
_core_pd_cap (core_pd_cap), _core_pd (core_pd),
_core_cpu_cap(core_cpu_cap), _core_cpu(core_cpu),
_cap_quota(Child::effective_quota(cap_quota)),
_ram_quota(Child::effective_quota(ram_quota)),
_child(local_rm, _entrypoint, *this)
{
_entrypoint.activate();
}
_child(local_rm, ep, *this)
{ }
/****************************
@ -314,7 +306,7 @@ int main()
static Reconstructible<Core_child>
init(services, local_rm, core_pd, core_pd_cap, core_cpu, core_cpu_cap,
init_cap_quota, init_ram_quota);
init_cap_quota, init_ram_quota, ep);
platform()->wait_for_exit();

16
repos/base/src/core/signal_source_component.cc
View File

@ -88,23 +88,15 @@ Signal_source::Signal Signal_source_component::wait_for_signal()
Signal_source_component::Signal_source_component(Rpc_entrypoint *ep)
:
_entrypoint(ep), _finalizer(*this),
_finalizer_cap(_entrypoint->manage(&_finalizer))
_entrypoint(ep)
{ }
Signal_source_component::~Signal_source_component()
{
_finalizer_cap.call<Finalizer::Rpc_exit>();
_entrypoint->dissolve(&_finalizer);
}
void Signal_source_component::Finalizer_component::exit()
{
if (!source._reply_cap.valid())
if (!_reply_cap.valid())
return;
source._entrypoint->reply_signal_info(source._reply_cap, 0, 0);
source._reply_cap = Untyped_capability();
_entrypoint->reply_signal_info(_reply_cap, 0, 0);
_reply_cap = Untyped_capability();
}