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#include "rust_globals.h"
#include "rust_task.h"
#include "rust_shape.h"
class annihilator : public shape::data<annihilator,shape::ptr> {
friend class shape::data<annihilator,shape::ptr>;
annihilator(const annihilator &other, const shape::ptr &in_dp)
: shape::data<annihilator,shape::ptr>(other.task, other.align,
other.sp, other.params,
other.tables, in_dp) {}
annihilator(const annihilator &other,
const uint8_t *in_sp,
const shape::type_param *in_params,
const rust_shape_tables *in_tables = NULL)
: shape::data<annihilator,shape::ptr>(other.task,
other.align,
in_sp,
in_params,
in_tables ? in_tables : other.tables,
other.dp) {}
annihilator(const annihilator &other,
const uint8_t *in_sp,
const shape::type_param *in_params,
const rust_shape_tables *in_tables,
shape::ptr in_dp)
: shape::data<annihilator,shape::ptr>(other.task,
other.align,
in_sp,
in_params,
in_tables,
in_dp) {}
annihilator(rust_task *in_task,
bool in_align,
const uint8_t *in_sp,
const shape::type_param *in_params,
const rust_shape_tables *in_tables,
uint8_t *in_data)
: shape::data<annihilator,shape::ptr>(in_task, in_align, in_sp,
in_params, in_tables, in_data) {}
void walk_vec2(bool is_pod, uint16_t sp_size) {
void *vec = shape::get_dp<void *>(dp);
walk_vec2(is_pod, get_vec_data_range(dp));
task->kernel->free(vec);
}
void walk_vec2(bool is_pod,
const std::pair<shape::ptr,shape::ptr> &data_range) {
annihilator sub(*this, data_range.first);
shape::ptr data_end = sub.end_dp = data_range.second;
while (sub.dp < data_end) {
sub.walk_reset();
sub.align = true;
}
}
void walk_tag2(shape::tag_info &tinfo, uint32_t tag_variant) {
shape::data<annihilator,shape::ptr>
::walk_variant1(tinfo, tag_variant);
}
void walk_uniq2() {
void *x = *((void **)dp);
// free contents first:
shape::data<annihilator,shape::ptr>::walk_uniq_contents1();
// now free the ptr:
task->kernel->free(x);
}
void walk_box2() {
// In annihilator phase, do not walk the box contents. There is an
// outer loop walking all remaining boxes, and this box may well
// have been freed already!
}
void walk_fn2(char code) {
switch (code) {
case shape::SHAPE_UNIQ_FN: {
fn_env_pair pair = *(fn_env_pair*)dp;
if (pair.env) {
// free closed over data:
shape::data<annihilator,shape::ptr>::walk_fn_contents1();
// now free the ptr:
task->kernel->free(pair.env);
}
break;
}
case shape::SHAPE_BOX_FN: {
// the box will be visited separately:
shape::bump_dp<void*>(dp); // skip over the code ptr
walk_box2(); // walk over the environment ptr
break;
}
case shape::SHAPE_BARE_FN: // Does not close over data.
case shape::SHAPE_STACK_FN: break; // Not reachable from heap.
default: abort();
}
}
void walk_obj2() {
return;
}
void walk_iface2() {
walk_box2();
}
void walk_tydesc2(char kind) {
switch(kind) {
case shape::SHAPE_TYDESC:
case shape::SHAPE_SEND_TYDESC:
break;
default: abort();
}
}
struct run_dtor_args {
const shape::rust_fn *dtor;
void *data;
};
typedef void (*dtor)(void **retptr, void *env, void *dptr);
static void run_dtor(run_dtor_args *args) {
dtor f = (dtor)args->dtor;
f(NULL, args->dtor->env, args->data);
}
void walk_res2(const shape::rust_fn *dtor, unsigned n_params,
const shape::type_param *params, const uint8_t *end_sp,
bool live) {
void *data = (void*)(uintptr_t)dp;
// Switch back to the Rust stack to run the destructor
run_dtor_args args = {dtor, data};
task->call_on_rust_stack((void*)&args, (void*)run_dtor);
while (this->sp != end_sp) {
this->walk();
align = true;
}
}
void walk_subcontext2(annihilator &sub) { sub.walk(); }
void walk_uniq_contents2(annihilator &sub) { sub.walk(); }
void walk_struct2(const uint8_t *end_sp) {
while (this->sp != end_sp) {
this->walk();
align = true;
}
}
void walk_variant2(shape::tag_info &tinfo, uint32_t variant_id,
const std::pair<const uint8_t *,const uint8_t *>
variant_ptr_and_end) {
annihilator sub(*this, variant_ptr_and_end.first, tinfo.params);
const uint8_t *variant_end = variant_ptr_and_end.second;
while (sub.sp < variant_end) {
sub.walk();
align = true;
}
}
template<typename T>
inline void walk_number2() { /* no-op */ }
public:
static void do_annihilate(rust_task *task, rust_opaque_box *box);
};
void
annihilator::do_annihilate(rust_task *task, rust_opaque_box *box) {
const type_desc *tydesc = box->td;
uint8_t *p = (uint8_t*) box_body(box);
shape::arena arena;
shape::type_param *params =
shape::type_param::from_tydesc_and_data(tydesc, p, arena);
annihilator annihilator(task, true, tydesc->shape,
params, tydesc->shape_tables, p);
annihilator.walk();
task->boxed.free(box);
}
void
annihilate_box(rust_task *task, rust_opaque_box *box) {
annihilator::do_annihilate(task, box);
}
void
annihilate_boxes(rust_task *task) {
LOG(task, gc, "annihilating boxes for task %p", task);
boxed_region *boxed = &task->boxed;
rust_opaque_box *box = boxed->first_live_alloc();
while (box != NULL) {
rust_opaque_box *tmp = box;
box = box->next;
annihilate_box(task, tmp);
}
}
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