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Separation of thread operations from CPU session

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This patch moves the thread operations from the 'Cpu_session'
to the 'Cpu_thread' interface.

A noteworthy semantic change is the meaning of the former
'exception_handler' function, which used to define both, the default
exception handler or a thread-specific signal handler. Now, the
'Cpu_session::exception_sigh' function defines the CPU-session-wide
default handler whereas the 'Cpu_thread::exception_sigh' function
defines the thread-specific one.

To retain the ability to create 'Child' objects without invoking a
capability, the child's initial thread must be created outside the
'Child::Process'. It is now represented by the 'Child::Initial_thread',
which is passed as argument to the 'Child' constructor.

Fixes #1939
This commit is contained in:
Norman Feske
2016-05-10 18:05:38 +02:00
committed by Christian Helmuth
parent 59aec6114b
commit a99989af40
66 changed files with 1261 additions and 1384 deletions
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9
repos/base-nova/src/lib/base/thread_start.cc
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@ -21,6 +21,7 @@
#include <base/rpc_client.h>
#include <session/session.h>
#include <nova_native_cpu/client.h>
#include <cpu_thread/client.h>
/* base-internal includes */
#include <base/internal/stack.h>
@ -164,11 +165,11 @@ void Thread::start()
/* local thread have no start instruction pointer - set via portal entry */
addr_t thread_ip = global ? reinterpret_cast<addr_t>(_thread_start) : 0;
try { _cpu_session->state(_thread_cap, state); }
Cpu_thread_client cpu_thread(_thread_cap);
try { cpu_thread.state(state); }
catch (...) { throw Cpu_session::Thread_creation_failed(); }
if (_cpu_session->start(_thread_cap, thread_ip, _stack->top()))
throw Cpu_session::Thread_creation_failed();
cpu_thread.start(thread_ip, _stack->top());
/* request native EC thread cap */
native_thread().ec_sel = cap_map()->insert(1);
@ -193,7 +194,7 @@ void Thread::start()
if (global)
/* request creation of SC to let thread run*/
_cpu_session->resume(_thread_cap);
cpu_thread.resume();
}