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gc.c
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/**********************************************************************
gc.c -
$Author$
created at: Tue Oct 5 09:44:46 JST 1993
Copyright (C) 1993-2007 Yukihiro Matsumoto
Copyright (C) 2000 Network Applied Communication Laboratory, Inc.
Copyright (C) 2000 Information-technology Promotion Agency, Japan
**********************************************************************/
#include "ruby/ruby.h"
#include "ruby/signal.h"
#include "ruby/st.h"
#include "ruby/node.h"
#include "ruby/re.h"
#include "ruby/io.h"
#include "ruby/util.h"
#include "eval_intern.h"
#include "vm_core.h"
#include "gc.h"
#include <stdio.h>
#include <setjmp.h>
#include <sys/types.h>
#ifdef HAVE_SYS_TIME_H
#include <sys/time.h>
#endif
#ifdef HAVE_SYS_RESOURCE_H
#include <sys/resource.h>
#endif
#if defined _WIN32 || defined __CYGWIN__
#include <windows.h>
#endif
#ifdef HAVE_VALGRIND_MEMCHECK_H
# include <valgrind/memcheck.h>
# ifndef VALGRIND_MAKE_MEM_DEFINED
# define VALGRIND_MAKE_MEM_DEFINED(p, n) VALGRIND_MAKE_READABLE(p, n)
# endif
# ifndef VALGRIND_MAKE_MEM_UNDEFINED
# define VALGRIND_MAKE_MEM_UNDEFINED(p, n) VALGRIND_MAKE_WRITABLE(p, n)
# endif
#else
# define VALGRIND_MAKE_MEM_DEFINED(p, n) /* empty */
# define VALGRIND_MAKE_MEM_UNDEFINED(p, n) /* empty */
#endif
int rb_io_fptr_finalize(struct rb_io_t*);
#define rb_setjmp(env) RUBY_SETJMP(env)
#define rb_jmp_buf rb_jmpbuf_t
/* Make alloca work the best possible way. */
#ifdef __GNUC__
# ifndef atarist
# ifndef alloca
# define alloca __builtin_alloca
# endif
# endif /* atarist */
#else
# ifdef HAVE_ALLOCA_H
# include <alloca.h>
# else
# ifdef _AIX
#pragma alloca
# else
# ifndef alloca /* predefined by HP cc +Olibcalls */
void *alloca ();
# endif
# endif /* AIX */
# endif /* HAVE_ALLOCA_H */
#endif /* __GNUC__ */
#ifndef GC_MALLOC_LIMIT
#if defined(MSDOS) || defined(__human68k__)
#define GC_MALLOC_LIMIT 200000
#else
#define GC_MALLOC_LIMIT 8000000
#endif
#endif
#define nomem_error GET_VM()->special_exceptions[ruby_error_nomemory]
#define MARK_STACK_MAX 1024
int ruby_gc_debug_indent = 0;
#undef GC_DEBUG
#if defined(_MSC_VER) || defined(__BORLANDC__) || defined(__CYGWIN__)
#pragma pack(push, 1) /* magic for reducing sizeof(RVALUE): 24 -> 20 */
#endif
typedef struct RVALUE {
union {
struct {
VALUE flags; /* always 0 for freed obj */
struct RVALUE *next;
} free;
struct RBasic basic;
struct RObject object;
struct RClass klass;
struct RFloat flonum;
struct RString string;
struct RArray array;
struct RRegexp regexp;
struct RHash hash;
struct RData data;
struct RStruct rstruct;
struct RBignum bignum;
struct RFile file;
struct RNode node;
struct RMatch match;
struct RRational rational;
struct RComplex complex;
} as;
#ifdef GC_DEBUG
char *file;
int line;
#endif
} RVALUE;
#if defined(_MSC_VER) || defined(__BORLANDC__) || defined(__CYGWIN__)
#pragma pack(pop)
#endif
struct heaps_slot {
void *membase;
RVALUE *slot;
int limit;
};
#define HEAP_MIN_SLOTS 10000
#define FREE_MIN 4096
struct gc_list {
VALUE *varptr;
struct gc_list *next;
};
#define CALC_EXACT_MALLOC_SIZE 0
typedef struct rb_objspace {
struct {
size_t limit;
size_t increase;
#if CALC_EXACT_MALLOC_SIZE
size_t allocated_size;
size_t allocations;
#endif
} malloc_params;
struct {
size_t increment;
struct heaps_slot *ptr;
size_t length;
size_t used;
RVALUE *freelist;
RVALUE *range[2];
RVALUE *freed;
} heap;
struct {
int dont_gc;
int during_gc;
} flags;
struct {
st_table *table;
RVALUE *deferred;
} final;
struct {
VALUE buffer[MARK_STACK_MAX];
VALUE *ptr;
int overflow;
} markstack;
struct gc_list *global_list;
unsigned int count;
int gc_stress;
} rb_objspace_t;
#if defined(ENABLE_VM_OBJSPACE) && ENABLE_VM_OBJSPACE
#define rb_objspace (*GET_VM()->objspace)
static int ruby_initial_gc_stress = 0;
int *ruby_initial_gc_stress_ptr = &ruby_initial_gc_stress;
#else
static rb_objspace_t rb_objspace = {{GC_MALLOC_LIMIT}, {HEAP_MIN_SLOTS}};
int *ruby_initial_gc_stress_ptr = &rb_objspace.gc_stress;
#endif
#define malloc_limit objspace->malloc_params.limit
#define malloc_increase objspace->malloc_params.increase
#define heap_slots objspace->heap.slots
#define heaps objspace->heap.ptr
#define heaps_length objspace->heap.length
#define heaps_used objspace->heap.used
#define freelist objspace->heap.freelist
#define lomem objspace->heap.range[0]
#define himem objspace->heap.range[1]
#define heaps_inc objspace->heap.increment
#define heaps_freed objspace->heap.freed
#define dont_gc objspace->flags.dont_gc
#define during_gc objspace->flags.during_gc
#define finalizer_table objspace->final.table
#define deferred_final_list objspace->final.deferred
#define mark_stack objspace->markstack.buffer
#define mark_stack_ptr objspace->markstack.ptr
#define mark_stack_overflow objspace->markstack.overflow
#define global_List objspace->global_list
#define ruby_gc_stress objspace->gc_stress
#define need_call_final (finalizer_table && finalizer_table->num_entries)
#if defined(ENABLE_VM_OBJSPACE) && ENABLE_VM_OBJSPACE
rb_objspace_t *
rb_objspace_alloc(void)
{
rb_objspace_t *objspace = malloc(sizeof(rb_objspace_t));
memset(objspace, 0, sizeof(*objspace));
malloc_limit = GC_MALLOC_LIMIT;
ruby_gc_stress = ruby_initial_gc_stress;
return objspace;
}
#endif
/* tiny heap size */
/* 32KB */
/*#define HEAP_SIZE 0x8000 */
/* 128KB */
/*#define HEAP_SIZE 0x20000 */
/* 64KB */
/*#define HEAP_SIZE 0x10000 */
/* 16KB */
#define HEAP_SIZE 0x4000
/* 8KB */
/*#define HEAP_SIZE 0x2000 */
/* 4KB */
/*#define HEAP_SIZE 0x1000 */
/* 2KB */
/*#define HEAP_SIZE 0x800 */
#define HEAP_OBJ_LIMIT (HEAP_SIZE / sizeof(struct RVALUE))
extern st_table *rb_class_tbl;
int ruby_disable_gc_stress = 0;
static void run_final(rb_objspace_t *objspace, VALUE obj);
static int garbage_collect(rb_objspace_t *objspace);
void
rb_global_variable(VALUE *var)
{
rb_gc_register_address(var);
}
void
rb_memerror(void)
{
rb_thread_t *th = GET_THREAD();
if (!nomem_error ||
(rb_thread_raised_p(th, RAISED_NOMEMORY) && rb_safe_level() < 4)) {
fprintf(stderr, "[FATAL] failed to allocate memory\n");
exit(EXIT_FAILURE);
}
if (rb_thread_raised_p(th, RAISED_NOMEMORY)) {
rb_thread_raised_clear(th);
GET_THREAD()->errinfo = nomem_error;
JUMP_TAG(TAG_RAISE);
}
rb_thread_raised_set(th, RAISED_NOMEMORY);
rb_exc_raise(nomem_error);
}
/*
* call-seq:
* GC.stress => true or false
*
* returns current status of GC stress mode.
*/
static VALUE
gc_stress_get(VALUE self)
{
rb_objspace_t *objspace = &rb_objspace;
return ruby_gc_stress ? Qtrue : Qfalse;
}
/*
* call-seq:
* GC.stress = bool => bool
*
* updates GC stress mode.
*
* When GC.stress = true, GC is invoked for all GC opportunity:
* all memory and object allocation.
*
* Since it makes Ruby very slow, it is only for debugging.
*/
static VALUE
gc_stress_set(VALUE self, VALUE bool)
{
rb_objspace_t *objspace = &rb_objspace;
rb_secure(2);
ruby_gc_stress = RTEST(bool);
return bool;
}
static void *
vm_xmalloc(rb_objspace_t *objspace, size_t size)
{
void *mem;
if (size < 0) {
rb_raise(rb_eNoMemError, "negative allocation size (or too big)");
}
if (size == 0) size = 1;
#if CALC_EXACT_MALLOC_SIZE
size += sizeof(size_t);
#endif
if ((ruby_gc_stress && !ruby_disable_gc_stress) ||
(malloc_increase+size) > malloc_limit) {
garbage_collect(objspace);
}
RUBY_CRITICAL(mem = malloc(size));
if (!mem) {
if (garbage_collect(objspace)) {
RUBY_CRITICAL(mem = malloc(size));
}
if (!mem) {
rb_memerror();
}
}
malloc_increase += size;
#if CALC_EXACT_MALLOC_SIZE
objspace->malloc_params.allocated_size += size;
objspace->malloc_params.allocations++;
((size_t *)mem)[0] = size;
mem = (size_t *)mem + 1;
#endif
return mem;
}
static void *
vm_xrealloc(rb_objspace_t *objspace, void *ptr, size_t size)
{
void *mem;
if (size < 0) {
rb_raise(rb_eArgError, "negative re-allocation size");
}
if (!ptr) return ruby_xmalloc(size);
if (size == 0) size = 1;
if (ruby_gc_stress && !ruby_disable_gc_stress) garbage_collect(objspace);
#if CALC_EXACT_MALLOC_SIZE
size += sizeof(size_t);
objspace->malloc_params.allocated_size -= size;
ptr = (size_t *)ptr - 1;
#endif
RUBY_CRITICAL(mem = realloc(ptr, size));
if (!mem) {
if (garbage_collect(objspace)) {
RUBY_CRITICAL(mem = realloc(ptr, size));
}
if (!mem) {
rb_memerror();
}
}
malloc_increase += size;
#if CALC_EXACT_MALLOC_SIZE
objspace->malloc_params.allocated_size += size;
((size_t *)mem)[0] = size;
mem = (size_t *)mem + 1;
#endif
return mem;
}
static void
vm_xfree(rb_objspace_t *objspace, void *ptr)
{
#if CALC_EXACT_MALLOC_SIZE
size_t size;
ptr = ((size_t *)ptr) - 1;
size = ((size_t*)ptr)[0];
objspace->malloc_params.allocated_size -= size;
objspace->malloc_params.allocations--;
#endif
RUBY_CRITICAL(free(ptr));
}
void *
ruby_xmalloc(size_t size)
{
return vm_xmalloc(&rb_objspace, size);
}
void *
ruby_xmalloc2(size_t n, size_t size)
{
size_t len = size * n;
if (n != 0 && size != len / n) {
rb_raise(rb_eArgError, "malloc: possible integer overflow");
}
return vm_xmalloc(&rb_objspace, len);
}
void *
ruby_xcalloc(size_t n, size_t size)
{
void *mem = ruby_xmalloc2(n, size);
memset(mem, 0, n * size);
return mem;
}
void *
ruby_xrealloc(void *ptr, size_t size)
{
return vm_xrealloc(&rb_objspace, ptr, size);
}
void *
ruby_xrealloc2(void *ptr, size_t n, size_t size)
{
size_t len = size * n;
if (n != 0 && size != len / n) {
rb_raise(rb_eArgError, "realloc: possible integer overflow");
}
return ruby_xrealloc(ptr, len);
}
void
ruby_xfree(void *x)
{
if (x)
vm_xfree(&rb_objspace, x);
}
/*
* call-seq:
* GC.enable => true or false
*
* Enables garbage collection, returning <code>true</code> if garbage
* collection was previously disabled.
*
* GC.disable #=> false
* GC.enable #=> true
* GC.enable #=> false
*
*/
VALUE
rb_gc_enable(void)
{
rb_objspace_t *objspace = &rb_objspace;
int old = dont_gc;
dont_gc = Qfalse;
return old;
}
/*
* call-seq:
* GC.disable => true or false
*
* Disables garbage collection, returning <code>true</code> if garbage
* collection was already disabled.
*
* GC.disable #=> false
* GC.disable #=> true
*
*/
VALUE
rb_gc_disable(void)
{
rb_objspace_t *objspace = &rb_objspace;
int old = dont_gc;
dont_gc = Qtrue;
return old;
}
VALUE rb_mGC;
void
rb_register_mark_object(VALUE obj)
{
VALUE ary = GET_THREAD()->vm->mark_object_ary;
rb_ary_push(ary, obj);
}
void
rb_gc_register_address(VALUE *addr)
{
rb_objspace_t *objspace = &rb_objspace;
struct gc_list *tmp;
tmp = ALLOC(struct gc_list);
tmp->next = global_List;
tmp->varptr = addr;
global_List = tmp;
}
void
rb_gc_unregister_address(VALUE *addr)
{
rb_objspace_t *objspace = &rb_objspace;
struct gc_list *tmp = global_List;
if (tmp->varptr == addr) {
global_List = tmp->next;
xfree(tmp);
return;
}
while (tmp->next) {
if (tmp->next->varptr == addr) {
struct gc_list *t = tmp->next;
tmp->next = tmp->next->next;
xfree(t);
break;
}
tmp = tmp->next;
}
}
static void
allocate_heaps(rb_objspace_t *objspace, size_t next_heaps_length)
{
struct heaps_slot *p;
size_t size;
size = next_heaps_length*sizeof(struct heaps_slot);
RUBY_CRITICAL(
if (heaps_used > 0) {
p = (struct heaps_slot *)realloc(heaps, size);
if (p) heaps = p;
}
else {
p = heaps = (struct heaps_slot *)malloc(size);
}
);
if (p == 0) rb_memerror();
heaps_length = next_heaps_length;
}
static void
assign_heap_slot(rb_objspace_t *objspace)
{
RVALUE *p, *pend, *membase;
size_t hi, lo, mid;
int objs;
objs = HEAP_OBJ_LIMIT;
RUBY_CRITICAL(p = (RVALUE*)malloc(HEAP_SIZE));
if (p == 0)
rb_memerror();
membase = p;
if ((VALUE)p % sizeof(RVALUE) != 0) {
p = (RVALUE*)((VALUE)p + sizeof(RVALUE) - ((VALUE)p % sizeof(RVALUE)));
if ((HEAP_SIZE - HEAP_OBJ_LIMIT * sizeof(RVALUE)) < ((char*)p - (char*)membase)) {
objs--;
}
}
lo = 0;
hi = heaps_used;
while (lo < hi) {
register RVALUE *mid_membase;
mid = (lo + hi) / 2;
mid_membase = heaps[mid].membase;
if (mid_membase < membase) {
lo = mid + 1;
}
else if (mid_membase > membase) {
hi = mid;
}
else {
rb_bug("same heap slot is allocated: %p at %"PRIuVALUE, membase, (VALUE)mid);
}
}
if (hi < heaps_used) {
MEMMOVE(&heaps[hi+1], &heaps[hi], struct heaps_slot, heaps_used - hi);
}
heaps[hi].membase = membase;
heaps[hi].slot = p;
heaps[hi].limit = objs;
pend = p + objs;
if (lomem == 0 || lomem > p) lomem = p;
if (himem < pend) himem = pend;
heaps_used++;
while (p < pend) {
p->as.free.flags = 0;
p->as.free.next = freelist;
freelist = p;
p++;
}
}
static void
init_heap(rb_objspace_t *objspace)
{
size_t add, i;
add = HEAP_MIN_SLOTS / HEAP_OBJ_LIMIT;
if ((heaps_used + add) > heaps_length) {
allocate_heaps(objspace, heaps_used + add);
}
for (i = 0; i < add; i++) {
assign_heap_slot(objspace);
}
heaps_inc = 0;
}
static void
set_heaps_increment(rb_objspace_t *objspace)
{
size_t next_heaps_length = heaps_used * 1.8;
heaps_inc = next_heaps_length - heaps_used;
if (next_heaps_length > heaps_length) {
allocate_heaps(objspace, next_heaps_length);
}
}
static int
heaps_increment(rb_objspace_t *objspace)
{
if (heaps_inc > 0) {
assign_heap_slot(objspace);
heaps_inc--;
return Qtrue;
}
return Qfalse;
}
#define RANY(o) ((RVALUE*)(o))
static VALUE
rb_newobj_from_heap(rb_objspace_t *objspace)
{
VALUE obj;
if ((ruby_gc_stress && !ruby_disable_gc_stress) || !freelist) {
if (!heaps_increment(objspace) && !garbage_collect(objspace)) {
rb_memerror();
}
}
obj = (VALUE)freelist;
freelist = freelist->as.free.next;
MEMZERO((void*)obj, RVALUE, 1);
#ifdef GC_DEBUG
RANY(obj)->file = rb_sourcefile();
RANY(obj)->line = rb_sourceline();
#endif
return obj;
}
#if USE_VALUE_CACHE
static VALUE
rb_fill_value_cache(rb_thread_t *th)
{
rb_objspace_t *objspace = &rb_objspace;
int i;
VALUE rv;
/* LOCK */
for (i=0; i<RUBY_VM_VALUE_CACHE_SIZE; i++) {
VALUE v = rb_newobj_from_heap(objspace);
th->value_cache[i] = v;
RBASIC(v)->flags = FL_MARK;
}
th->value_cache_ptr = &th->value_cache[0];
rv = rb_newobj_from_heap(objspace);
/* UNLOCK */
return rv;
}
#endif
VALUE
rb_newobj(void)
{
#if USE_VALUE_CACHE || (defined(ENABLE_VM_OBJSPACE) && ENABLE_VM_OBJSPACE)
rb_thread_t *th = GET_THREAD();
#endif
#if USE_VALUE_CACHE
VALUE v = *th->value_cache_ptr;
#endif
#if defined(ENABLE_VM_OBJSPACE) && ENABLE_VM_OBJSPACE
rb_objspace_t *objspace = th->vm->objspace;
#else
rb_objspace_t *objspace = &rb_objspace;
#endif
if (during_gc) {
dont_gc = 1;
during_gc = 0;
rb_bug("object allocation during garbage collection phase");
}
#if USE_VALUE_CACHE
if (v) {
RBASIC(v)->flags = 0;
th->value_cache_ptr++;
}
else {
v = rb_fill_value_cache(th);
}
#if defined(GC_DEBUG)
printf("cache index: %d, v: %p, th: %p\n",
th->value_cache_ptr - th->value_cache, v, th);
#endif
return v;
#else
return rb_newobj_from_heap(objspace);
#endif
}
NODE*
rb_node_newnode(enum node_type type, VALUE a0, VALUE a1, VALUE a2)
{
NODE *n = (NODE*)rb_newobj();
n->flags |= T_NODE;
nd_set_type(n, type);
n->u1.value = a0;
n->u2.value = a1;
n->u3.value = a2;
return n;
}
VALUE
rb_data_object_alloc(VALUE klass, void *datap, RUBY_DATA_FUNC dmark, RUBY_DATA_FUNC dfree)
{
NEWOBJ(data, struct RData);
if (klass) Check_Type(klass, T_CLASS);
OBJSETUP(data, klass, T_DATA);
data->data = datap;
data->dfree = dfree;
data->dmark = dmark;
return (VALUE)data;
}
#ifdef __ia64
#define SET_STACK_END (SET_MACHINE_STACK_END(&th->machine_stack_end), th->machine_register_stack_end = rb_ia64_bsp())
#else
#define SET_STACK_END SET_MACHINE_STACK_END(&th->machine_stack_end)
#endif
#define STACK_START (th->machine_stack_start)
#define STACK_END (th->machine_stack_end)
#define STACK_LEVEL_MAX (th->machine_stack_maxsize/sizeof(VALUE))
#if STACK_GROW_DIRECTION < 0
# define STACK_LENGTH (STACK_START - STACK_END)
#elif STACK_GROW_DIRECTION > 0
# define STACK_LENGTH (STACK_END - STACK_START + 1)
#else
# define STACK_LENGTH ((STACK_END < STACK_START) ? STACK_START - STACK_END\
: STACK_END - STACK_START + 1)
#endif
#if !STACK_GROW_DIRECTION
int ruby_stack_grow_direction;
int
ruby_get_stack_grow_direction(VALUE *addr)
{
rb_thread_t *th = GET_THREAD();
SET_STACK_END;
if (STACK_END > addr) return ruby_stack_grow_direction = 1;
return ruby_stack_grow_direction = -1;
}
#endif
#define GC_WATER_MARK 512
int
ruby_stack_length(VALUE **p)
{
rb_thread_t *th = GET_THREAD();
SET_STACK_END;
if (p) *p = STACK_UPPER(STACK_END, STACK_START, STACK_END);
return STACK_LENGTH;
}
int
ruby_stack_check(void)
{
int ret;
rb_thread_t *th = GET_THREAD();
SET_STACK_END;
ret = STACK_LENGTH > STACK_LEVEL_MAX - GC_WATER_MARK;
#ifdef __ia64
if (!ret) {
ret = (VALUE*)rb_ia64_bsp() - th->machine_register_stack_start >
th->machine_register_stack_maxsize/sizeof(VALUE) - GC_WATER_MARK;
}
#endif
return ret;
}
static void
init_mark_stack(rb_objspace_t *objspace)
{
mark_stack_overflow = 0;
mark_stack_ptr = mark_stack;
}
#define MARK_STACK_EMPTY (mark_stack_ptr == mark_stack)
static void gc_mark(rb_objspace_t *objspace, VALUE ptr, int lev);
static void gc_mark_children(rb_objspace_t *objspace, VALUE ptr, int lev);
static void
gc_mark_all(rb_objspace_t *objspace)
{
RVALUE *p, *pend;
size_t i;
init_mark_stack(objspace);
for (i = 0; i < heaps_used; i++) {
p = heaps[i].slot; pend = p + heaps[i].limit;
while (p < pend) {
if ((p->as.basic.flags & FL_MARK) &&
(p->as.basic.flags != FL_MARK)) {
gc_mark_children(objspace, (VALUE)p, 0);
}
p++;
}
}
}
static void
gc_mark_rest(rb_objspace_t *objspace)
{
VALUE tmp_arry[MARK_STACK_MAX];
VALUE *p;
p = (mark_stack_ptr - mark_stack) + tmp_arry;
MEMCPY(tmp_arry, mark_stack, VALUE, p - tmp_arry);
init_mark_stack(objspace);
while (p != tmp_arry) {
p--;
gc_mark_children(objspace, *p, 0);
}
}
static inline int
is_pointer_to_heap(rb_objspace_t *objspace, void *ptr)
{
register RVALUE *p = RANY(ptr);
register struct heaps_slot *heap;
register size_t hi, lo, mid;
if (p < lomem || p > himem) return Qfalse;
if ((VALUE)p % sizeof(RVALUE) != 0) return Qfalse;
/* check if p looks like a pointer using bsearch*/
lo = 0;
hi = heaps_used;
while (lo < hi) {
mid = (lo + hi) / 2;
heap = &heaps[mid];
if (heap->slot <= p) {
if (p < heap->slot + heap->limit)
return Qtrue;
lo = mid + 1;
}
else {
hi = mid;
}
}
return Qfalse;
}
static void
mark_locations_array(rb_objspace_t *objspace, register VALUE *x, register long n)
{
VALUE v;
while (n--) {
v = *x;
VALGRIND_MAKE_MEM_DEFINED(&v, sizeof(v));
if (is_pointer_to_heap(objspace, (void *)v)) {
gc_mark(objspace, v, 0);
}
x++;
}
}
static void
gc_mark_locations(rb_objspace_t *objspace, VALUE *start, VALUE *end)
{
long n;
if (end <= start) return;
n = end - start;
mark_locations_array(objspace, start, n);
}
void
rb_gc_mark_locations(VALUE *start, VALUE *end)
{
gc_mark_locations(&rb_objspace, start, end);
}
#define rb_gc_mark_locations(start, end) gc_mark_locations(objspace, start, end)
struct mark_tbl_arg {
rb_objspace_t *objspace;
int lev;
};
static int
mark_entry(ID key, VALUE value, st_data_t data)
{
struct mark_tbl_arg *arg = (void*)data;
gc_mark(arg->objspace, value, arg->lev);
return ST_CONTINUE;
}
static void
mark_tbl(rb_objspace_t *objspace, st_table *tbl, int lev)
{
struct mark_tbl_arg arg;
if (!tbl) return;
arg.objspace = objspace;
arg.lev = lev;
st_foreach(tbl, mark_entry, (st_data_t)&arg);
}
void
rb_mark_tbl(st_table *tbl)
{
mark_tbl(&rb_objspace, tbl, 0);
}
static int
mark_key(VALUE key, VALUE value, st_data_t data)
{
struct mark_tbl_arg *arg = (void*)data;
gc_mark(arg->objspace, key, arg->lev);
return ST_CONTINUE;
}
static void
mark_set(rb_objspace_t *objspace, st_table *tbl, int lev)
{
struct mark_tbl_arg arg;
if (!tbl) return;
arg.objspace = objspace;
arg.lev = lev;
st_foreach(tbl, mark_key, (st_data_t)&arg);
}
void
rb_mark_set(st_table *tbl)
{
mark_set(&rb_objspace, tbl, 0);
}
static int
mark_keyvalue(VALUE key, VALUE value, st_data_t data)
{
struct mark_tbl_arg *arg = (void*)data;
gc_mark(arg->objspace, key, arg->lev);
gc_mark(arg->objspace, value, arg->lev);
return ST_CONTINUE;
}
static void