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base-foc: fix capability index leak

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Call the destructor of the thread context object on thread destruction to
remove any contained capability references.

Fixes #393.
This commit is contained in:
Christian Prochaska 2012-10-22 20:25:20 +02:00 committed by Norman Feske
parent ecb6947f9c
commit 1389b63050
2 changed files with 11 additions and 3 deletions
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10
base-foc/include/base/cap_alloc.h
View File

@ -16,6 +16,7 @@
#include <base/cap_map.h>
#include <base/native_types.h>
#include <util/assert.h>
namespace Genode {
@ -77,6 +78,7 @@ namespace Genode {
return &_indices[i];
}
}
ASSERT(0, "cap index allocation failed");
return 0;
}
@ -90,8 +92,10 @@ namespace Genode {
*/
T* obj = reinterpret_cast<T*>(kcap_to_idx(addr));
if (obj < &_indices[0] || obj >= &_indices[SZ])
if (obj < &_indices[0] || obj >= &_indices[SZ]) {
ASSERT(0, "cap index out of bounds");
throw Index_out_of_bounds();
}
return new (obj) T();
}
@ -103,8 +107,10 @@ namespace Genode {
T* obj = static_cast<T*>(idx);
for (size_t i = 0; i < cnt; obj++, i++) {
/* range check given pointer address */
if (obj < &_indices[0] || obj >= &_indices[SZ])
if (obj < &_indices[0] || obj >= &_indices[SZ]) {
ASSERT(0, "cap index out of bounds");
throw Index_out_of_bounds();
}
delete obj;
}
}

4
base-foc/src/base/thread/thread.cc
View File

@ -89,6 +89,8 @@ void Thread_base::Context_allocator::free(Thread_base *thread_base)
Lock::Guard _lock_guard(_threads_lock);
_threads.remove(&thread_base->_list_element);
thread_base->_context->~Context();
}
@ -168,9 +170,9 @@ void Thread_base::_free_context()
{
addr_t ds_addr = _context->stack_base - Native_config::context_area_virtual_base();
Ram_dataspace_capability ds_cap = _context->ds_cap;
_context_allocator()->free(this);
Genode::env_context_area_rm_session()->detach((void *)ds_addr);
Genode::env_context_area_ram_session()->free(ds_cap);
_context_allocator()->free(this);
}