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#include "vm.hpp"
#include "fiber_stack.hpp"
#include "fiber_data.hpp"
#include "configuration.hpp"
#include "bug.hpp"
#include "gc/gc.hpp"
#include <stdlib.h>
#ifdef HAVE_VALGRIND_H
#include <valgrind/valgrind.h>
#endif
namespace rubinius {
FiberStack::FiberStack(size_t size)
: address_(0)
, size_(size)
, refs_(0)
, user_(0)
{}
void FiberStack::allocate() {
assert(!address_);
address_ = malloc(size_);
#ifdef HAVE_VALGRIND_H
valgrind_id_ = VALGRIND_STACK_REGISTER(address_, (char *)address_ + size_);
#endif
}
void FiberStack::free() {
if(!address_) return;
#ifdef HAVE_VALGRIND_H
VALGRIND_STACK_DEREGISTER(valgrind_id_);
#endif
::free(address_);
address_ = 0;
}
void FiberStack::flush(STATE) {
if(!user_) return;
// TODO assumes higher to lower stack growth.
user_->copy_to_heap(state);
}
void FiberStack::orphan(STATE, FiberData* user) {
if(user == user_) {
user_ = 0;
}
dec_ref();
}
FiberStacks::FiberStacks(VM* thread, SharedState& shared)
: max_stacks_(shared.config.fiber_stacks)
, stack_size_(shared.config.fiber_stack_size)
, thread_(thread)
, trampoline_(0)
{}
FiberStacks::~FiberStacks() {
for(Datas::iterator i = datas_.begin();
i != datas_.end();
++i)
{
(*i)->die();
}
for(Stacks::iterator i = stacks_.begin();
i != stacks_.end();
++i)
{
i->free();
}
}
void FiberStacks::gc_scan(GarbageCollector* gc) {
for(Datas::iterator i = datas_.begin();
i != datas_.end();
++i)
{
FiberData* data = *i;
if(data->dead_p()) continue;
AddressDisplacement dis(data->data_offset(),
data->data_lower_bound(),
data->data_upper_bound());
if(CallFrame* cf = data->call_frame()) {
gc->walk_call_frame(cf, &dis);
}
gc->scan(data->variable_root_buffers(), false, &dis);
}
}
FiberData* FiberStacks::new_data(bool root) {
FiberData* data = new FiberData(thread_, root);
datas_.push_back(data);
return data;
}
FiberStack* FiberStacks::allocate() {
for(Stacks::iterator i = stacks_.begin();
i != stacks_.end();
++i)
{
if(i->unused_p()) {
i->inc_ref();
return &*i;
}
}
FiberStack* stack = 0;
if(stacks_.size() < max_stacks_) {
stacks_.push_back(FiberStack(stack_size_));
stack = &stacks_.back();
stack->allocate();
} else {
for(Stacks::iterator i = stacks_.begin();
i != stacks_.end();
++i)
{
if(!stack || i->refs() < stack->refs()) {
stack = &*i;
}
}
assert(stack);
}
stack->inc_ref();
return stack;
}
void* FiberStacks::trampoline() {
if(trampoline_ == 0) {
trampoline_ = malloc(cTrampolineSize);
}
return trampoline_;
}
}
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