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base: use 'Ram_allocator' as stack-area back end

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The 'Stack_area_ram_session' is now a 'Stack_area_ram_allocator', which
simplifies the code and remove a dependency from the 'Ram_session'
interface, which we want to remove after all.

Issue #2407
This commit is contained in:
Norman Feske 2017-05-11 19:39:46 +02:00 committed by Christian Helmuth
parent d31642e8be
commit 5a3a1c704b
9 changed files with 32 additions and 66 deletions
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16
repos/base-linux/src/core/stack_area.cc
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@ -78,7 +78,7 @@ class Stack_area_region_map : public Genode::Region_map
};
struct Stack_area_ram_session : Genode::Ram_session
struct Stack_area_ram_allocator : Genode::Ram_allocator
{
Genode::Ram_dataspace_capability alloc(Genode::size_t size,
Genode::Cache_attribute) override {
@ -87,14 +87,6 @@ struct Stack_area_ram_session : Genode::Ram_session
void free(Genode::Ram_dataspace_capability) override { }
Genode::size_t dataspace_size(Genode::Ram_dataspace_capability) const override { return 0; }
void ref_account(Genode::Ram_session_capability) override { }
void transfer_quota(Genode::Ram_session_capability, Genode::Ram_quota) override { }
Genode::Ram_quota ram_quota() const override { return { 0 }; }
Genode::Ram_quota used_ram() const override { return { 0 }; }
};
@ -104,15 +96,15 @@ struct Stack_area_ram_session : Genode::Ram_session
namespace Genode {
Region_map *env_stack_area_region_map;
Ram_session *env_stack_area_ram_session;
Ram_allocator *env_stack_area_ram_allocator;
void init_stack_area()
{
static Stack_area_region_map rm_inst;
env_stack_area_region_map = &rm_inst;
static Stack_area_ram_session ram_inst;
env_stack_area_ram_session = &ram_inst;
static Stack_area_ram_allocator ram_inst;
env_stack_area_ram_allocator = &ram_inst;
}
}

2
repos/base-linux/src/lib/base/platform_env.cc
View File

@ -164,7 +164,7 @@ Platform_env::Platform_env()
_attach_stack_area();
env_stack_area_region_map = &_local_pd_session._stack_area;
env_stack_area_ram_session = ram_session();
env_stack_area_ram_allocator = ram_session();
/* register TID and PID of the main thread at core */
Linux_native_cpu_client native_cpu(cpu_session()->native_cpu());

20
repos/base-sel4/src/core/stack_area.cc
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@ -14,7 +14,7 @@
/* Genode includes */
#include <region_map/region_map.h>
#include <ram_session/ram_session.h>
#include <base/ram_allocator.h>
#include <base/log.h>
#include <base/synced_allocator.h>
#include <base/thread.h>
@ -108,8 +108,6 @@ class Stack_area_region_map : public Region_map
/* XXX missing XXX */
warning(__PRETTY_FUNCTION__, ": not implemented");
// Untyped_memory::convert_to_untyped_frames(phys_addr, phys_size)
// Untyped_memory::free_pages(phys_alloc, num_pages);
}
void fault_handler(Signal_context_capability) override { }
@ -120,7 +118,7 @@ class Stack_area_region_map : public Region_map
};
struct Stack_area_ram_session : Ram_session
struct Stack_area_ram_allocator : Ram_allocator
{
Ram_dataspace_capability alloc(size_t, Cache_attribute) override {
return reinterpret_cap_cast<Ram_dataspace>(Native_capability()); }
@ -129,28 +127,20 @@ struct Stack_area_ram_session : Ram_session
warning(__func__, " not implemented"); }
size_t dataspace_size(Ram_dataspace_capability) const override { return 0; }
void ref_account(Ram_session_capability) override { }
void transfer_quota(Ram_session_capability, Ram_quota) override { }
Ram_quota ram_quota() const override { return { 0 }; }
Ram_quota used_ram() const override { return { 0 }; }
};
namespace Genode {
Region_map *env_stack_area_region_map;
Ram_session *env_stack_area_ram_session;
Ram_allocator *env_stack_area_ram_allocator;
void init_stack_area()
{
static Stack_area_region_map rm_inst;
env_stack_area_region_map = &rm_inst;
static Stack_area_ram_session ram_inst;
env_stack_area_ram_session = &ram_inst;
static Stack_area_ram_allocator ram_inst;
env_stack_area_ram_allocator = &ram_inst;
}
}

4
repos/base/lib/symbols/ld
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@ -202,8 +202,8 @@ _ZN6Genode23Alarm_timeout_scheduler18_schedule_periodicERNS_7TimeoutENS_12Micros
_ZN6Genode23Alarm_timeout_scheduler7_enableEv T
_ZN6Genode23Alarm_timeout_schedulerC1ERNS_11Time_sourceE T
_ZN6Genode23Alarm_timeout_schedulerC2ERNS_11Time_sourceE T
_ZN6Genode25env_stack_area_region_mapE B 4
_ZN6Genode26env_stack_area_ram_sessionE B 4
_ZN6Genode25env_stack_area_region_mapE B 8
_ZN6Genode28env_stack_area_ram_allocatorE B 8
_ZN6Genode29upgrade_pd_quota_non_blockingENS_9Ram_quotaENS_9Cap_quotaE T
_ZN6Genode3Log3logEv T
_ZN6Genode3Log8_acquireENS0_4TypeE T

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

@ -14,7 +14,7 @@
/* Genode includes */
#include <region_map/region_map.h>
#include <ram_session/ram_session.h>
#include <pd_session/pd_session.h>
#include <base/log.h>
#include <base/synced_allocator.h>
#include <base/thread.h>
@ -31,7 +31,7 @@
namespace Genode {
Region_map *env_stack_area_region_map;
Ram_session *env_stack_area_ram_session;
Ram_allocator *env_stack_area_ram_allocator;
void init_stack_area();
}
@ -125,7 +125,7 @@ class Stack_area_region_map : public Region_map
};
struct Stack_area_ram_session : Ram_session
struct Stack_area_ram_allocator : Ram_allocator
{
Ram_dataspace_capability alloc(size_t, Cache_attribute) override {
return reinterpret_cap_cast<Ram_dataspace>(Native_capability()); }
@ -133,12 +133,6 @@ struct Stack_area_ram_session : Ram_session
void free(Ram_dataspace_capability) override { }
size_t dataspace_size(Ram_dataspace_capability) const override { return 0; }
void ref_account (Ram_session_capability) override { }
void transfer_quota (Ram_session_capability, Ram_quota) override { }
Ram_quota ram_quota () const override { return { 0 }; }
Ram_quota used_ram () const override { return { 0 }; }
};
@ -147,6 +141,6 @@ void Genode::init_stack_area()
static Stack_area_region_map rm;
env_stack_area_region_map = &rm;
static Stack_area_ram_session ram;
env_stack_area_ram_session = &ram;
static Stack_area_ram_allocator ram;
env_stack_area_ram_allocator = &ram;
}

2
repos/base/src/include/base/internal/globals.h
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@ -24,7 +24,7 @@ namespace Genode {
class Local_session_id_space;
extern Region_map *env_stack_area_region_map;
extern Ram_session *env_stack_area_ram_session;
extern Ram_allocator *env_stack_area_ram_allocator;
Thread_capability main_thread_cap();

2
repos/base/src/include/base/internal/platform_env.h
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@ -100,7 +100,7 @@ class Genode::Platform_env : public Env_deprecated,
_heap(&_resources.ram, &_resources.rm, Heap::UNLIMITED),
_emergency_ram_ds(_resources.ram.alloc(_emergency_ram_size()))
{
env_stack_area_ram_session = &_resources.ram;
env_stack_area_ram_allocator = &_resources.ram;
env_stack_area_region_map = &_stack_area;
}

4
repos/base/src/lib/base/stack_area.cc
View File

@ -13,13 +13,13 @@
/* Genode includes */
#include <region_map/region_map.h>
#include <ram_session/ram_session.h>
#include <base/ram_allocator.h>
/* base-internal includes */
#include <base/internal/globals.h>
namespace Genode {
Region_map *env_stack_area_region_map;
Ram_session *env_stack_area_ram_session;
Ram_allocator *env_stack_area_ram_allocator;
}

18
repos/base/src/lib/base/thread.cc
View File

@ -22,21 +22,11 @@
/* base-internal includes */
#include <base/internal/stack_allocator.h>
#include <base/internal/globals.h>
using namespace Genode;
/**
* Return the managed dataspace holding the stack area
*
* This function is provided by the process environment.
*/
namespace Genode {
extern Region_map * const env_stack_area_region_map;
extern Ram_session * const env_stack_area_ram_session;
}
void Stack::size(size_t const size)
{
/* check if the stack needs to be enhanced */
@ -57,7 +47,7 @@ void Stack::size(size_t const size)
/* allocate and attach backing store for the stack enhancement */
addr_t const ds_addr = _base - ds_size - stack_area_virtual_base();
try {
Ram_session * const ram = env_stack_area_ram_session;
Ram_allocator * const ram = env_stack_area_ram_allocator;
Ram_dataspace_capability const ds_cap = ram->alloc(ds_size);
Region_map * const rm = env_stack_area_region_map;
void * const attach_addr = rm->attach_at(ds_cap, ds_addr, ds_size);
@ -103,7 +93,7 @@ Thread::_alloc_stack(size_t stack_size, char const *name, bool main_thread)
/* allocate and attach backing store for the stack */
Ram_dataspace_capability ds_cap;
try {
ds_cap = env_stack_area_ram_session->alloc(ds_size);
ds_cap = env_stack_area_ram_allocator->alloc(ds_size);
addr_t attach_addr = ds_addr - stack_area_virtual_base();
if (attach_addr != (addr_t)env_stack_area_region_map->attach_at(ds_cap, attach_addr, ds_size))
throw Stack_alloc_failed();
@ -133,7 +123,7 @@ void Thread::_free_stack(Stack *stack)
stack->~Stack();
Genode::env_stack_area_region_map->detach((void *)ds_addr);
Genode::env_stack_area_ram_session->free(ds_cap);
Genode::env_stack_area_ram_allocator->free(ds_cap);
/* stack ready for reuse */
Stack_allocator::stack_allocator().free(stack);