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/*
* %CopyrightBegin%
*
* Copyright Ericsson AB 2007-2016. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* %CopyrightEnd%
*/
#ifndef __ERL_GC_H__
#define __ERL_GC_H__
#if defined(ERL_WANT_GC_INTERNALS__) || defined(ERTS_DO_INCL_GLB_INLINE_FUNC_DEF)
/* GC declarations shared by beam/erl_gc.c and hipe/hipe_gc.c */
#define ERTS_POTENTIALLY_LONG_GC_HSIZE (128*1024) /* Words */
#include "erl_map.h"
#include "erl_fun.h"
#include "erl_bits.h"
#define IS_MOVED_BOXED(x) (!is_header((x)))
#define IS_MOVED_CONS(x) (is_non_value((x)))
#define MOVE_CONS(PTR,CAR,HTOP,ORIG) \
do { \
Eterm gval; \
\
HTOP[0] = CAR; /* copy car */ \
HTOP[1] = PTR[1]; /* copy cdr */ \
gval = make_list(HTOP); /* new location */ \
*ORIG = gval; /* redirect original reference */ \
PTR[0] = THE_NON_VALUE; /* store forwarding indicator */ \
PTR[1] = gval; /* store forwarding address */ \
HTOP += 2; /* update tospace htop */ \
} while(0)
void erts_sub_binary_to_heap_binary(Eterm **pp, Eterm **hpp, Eterm *orig);
ERTS_GLB_INLINE void move_boxed(Eterm **pp, Eterm hdr, Eterm **hpp, Eterm *orig);
#if ERTS_GLB_INLINE_INCL_FUNC_DEF
ERTS_GLB_INLINE void move_boxed(Eterm **pp, Eterm hdr, Eterm **hpp, Eterm *orig)
{
Eterm gval;
Sint nelts;
Eterm *ptr = *pp;
Eterm *htop = *hpp;
ASSERT(is_header(hdr));
nelts = header_arity(hdr);
switch ((hdr) & _HEADER_SUBTAG_MASK) {
case SUB_BINARY_SUBTAG:
{
ErlSubBin *sb = (ErlSubBin *)ptr;
/* convert sub-binary to heap-binary if applicable */
if (sb->bitsize == 0 && sb->bitoffs == 0 &&
sb->is_writable == 0 && sb->size <= sizeof(Eterm) * 3) {
erts_sub_binary_to_heap_binary(pp, hpp, orig);
return;
}
}
nelts++;
break;
case MAP_SUBTAG:
if (is_flatmap_header(hdr)) nelts+=flatmap_get_size(ptr) + 1;
else nelts += hashmap_bitcount(MAP_HEADER_VAL(hdr));
break;
case FUN_SUBTAG: nelts+=((ErlFunThing*)(ptr))->num_free+1; break;
}
gval = make_boxed(htop);
*orig = gval;
*htop++ = hdr;
*ptr++ = gval;
while (nelts--) *htop++ = *ptr++;
*hpp = htop;
*pp = ptr;
}
#endif
#define ErtsInYoungGen(TPtr, Ptr, OldHeap, OldHeapSz) \
(!erts_is_literal((TPtr), (Ptr)) \
& !ErtsInArea((Ptr), (OldHeap), (OldHeapSz)))
ERTS_GLB_INLINE Eterm follow_moved(Eterm term, Eterm xptr_tag);
#if ERTS_GLB_INLINE_INCL_FUNC_DEF
ERTS_GLB_INLINE Eterm follow_moved(Eterm term, Eterm xptr_tag)
{
Eterm* ptr;
switch (primary_tag(term)) {
case TAG_PRIMARY_IMMED1:
break;
case TAG_PRIMARY_BOXED:
ptr = boxed_val(term);
if (IS_MOVED_BOXED(*ptr)) term = (*ptr) | xptr_tag;
break;
case TAG_PRIMARY_LIST:
ptr = list_val(term);
if (IS_MOVED_CONS(ptr[0])) term = (ptr[1]) | xptr_tag;
break;
default:
ASSERT(!"strange tag in follow_moved");
}
return term;
}
#endif
#endif /* ERL_GC_C__ || HIPE_GC_C__ */
/*
* Global exported
*/
#define ERTS_IS_GC_DESIRED_INTERNAL(Proc, HTop, STop) \
((((STop) - (HTop) < (Proc)->mbuf_sz)) \
| ((Proc)->off_heap.overhead > (Proc)->bin_vheap_sz) \
| !!((Proc)->flags & F_FORCE_GC))
#define ERTS_IS_GC_DESIRED(Proc) \
ERTS_IS_GC_DESIRED_INTERNAL((Proc), (Proc)->htop, (Proc)->stop)
#define ERTS_FORCE_GC_INTERNAL(Proc, FCalls) \
do { \
(Proc)->flags |= F_FORCE_GC; \
ERTS_VBUMP_ALL_REDS_INTERNAL((Proc), (FCalls)); \
} while (0)
#define ERTS_FORCE_GC(Proc) \
ERTS_FORCE_GC_INTERNAL((Proc), (Proc)->fcalls)
extern Uint erts_test_long_gc_sleep;
typedef struct {
Uint64 reclaimed;
Uint64 garbage_cols;
} ErtsGCInfo;
#define ERTS_PROCESS_GC_INFO_MAX_TERMS (11) /* number of elements in process_gc_info*/
#define ERTS_PROCESS_GC_INFO_MAX_SIZE \
(ERTS_PROCESS_GC_INFO_MAX_TERMS * (2/*cons*/ + 3/*2-tuple*/ + BIG_UINT_HEAP_SIZE))
Eterm erts_process_gc_info(struct process*, Uint *, Eterm **, Uint, Uint);
void erts_gc_info(ErtsGCInfo *gcip);
void erts_init_gc(void);
int erts_garbage_collect_nobump(struct process*, int, Eterm*, int, int);
void erts_garbage_collect(struct process*, int, Eterm*, int);
void erts_garbage_collect_hibernate(struct process* p);
Eterm erts_gc_after_bif_call_lhf(struct process* p, ErlHeapFragment *live_hf_end,
Eterm result, Eterm* regs, Uint arity);
Eterm erts_gc_after_bif_call(struct process* p, Eterm result, Eterm* regs, Uint arity);
int erts_garbage_collect_literals(struct process* p, Eterm* literals,
Uint lit_size,
struct erl_off_heap_header* oh,
int fcalls);
Uint erts_next_heap_size(Uint, Uint);
Eterm erts_heap_sizes(struct process* p);
void erts_offset_off_heap(struct erl_off_heap*, Sint, Eterm*, Eterm*);
void erts_offset_heap_ptr(Eterm*, Uint, Sint, Eterm*, Eterm*);
void erts_offset_heap(Eterm*, Uint, Sint, Eterm*, Eterm*);
void erts_free_heap_frags(struct process* p);
Eterm erts_max_heap_size_map(Sint, Uint, Eterm **, Uint *);
int erts_max_heap_size(Eterm, Uint *, Uint *);
void erts_deallocate_young_generation(Process *c_p);
#if defined(DEBUG) || defined(ERTS_OFFHEAP_DEBUG)
int erts_dbg_within_proc(Eterm *ptr, Process *p, Eterm* real_htop);
#endif
#endif /* __ERL_GC_H__ */
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