зеркало из https://github.com/github/ruby.git
2135 строки
46 KiB
C
2135 строки
46 KiB
C
/**********************************************************************
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gc.c -
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$Author$
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$Date$
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created at: Tue Oct 5 09:44:46 JST 1993
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Copyright (C) 1993-2003 Yukihiro Matsumoto
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Copyright (C) 2000 Network Applied Communication Laboratory, Inc.
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Copyright (C) 2000 Information-technology Promotion Agency, Japan
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**********************************************************************/
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#include "ruby.h"
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#include "rubysig.h"
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#include "st.h"
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#include "node.h"
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#include "re.h"
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#include "yarvcore.h"
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#include <stdio.h>
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#include <setjmp.h>
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#include <sys/types.h>
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#ifdef HAVE_SYS_TIME_H
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#include <sys/time.h>
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#endif
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#ifdef HAVE_SYS_RESOURCE_H
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#include <sys/resource.h>
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#endif
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#if defined _WIN32 || defined __CYGWIN__
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#include <windows.h>
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#endif
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int rb_io_fptr_finalize(struct OpenFile*);
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#if !defined(setjmp) && defined(HAVE__SETJMP)
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#define setjmp(env) _setjmp(env)
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#endif
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/* Make alloca work the best possible way. */
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#ifdef __GNUC__
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# ifndef atarist
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# ifndef alloca
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# define alloca __builtin_alloca
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# endif
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# endif /* atarist */
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#else
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# ifdef HAVE_ALLOCA_H
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# include <alloca.h>
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# else
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# ifdef _AIX
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#pragma alloca
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# else
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# ifndef alloca /* predefined by HP cc +Olibcalls */
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void *alloca ();
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# endif
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# endif /* AIX */
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# endif /* HAVE_ALLOCA_H */
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#endif /* __GNUC__ */
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#ifndef GC_MALLOC_LIMIT
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#if defined(MSDOS) || defined(__human68k__)
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#define GC_MALLOC_LIMIT 200000
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#else
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#define GC_MALLOC_LIMIT 8000000
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#endif
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#endif
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static unsigned long malloc_increase = 0;
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static unsigned long malloc_limit = GC_MALLOC_LIMIT;
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static VALUE nomem_error;
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static int dont_gc;
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static int during_gc;
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static int need_call_final = 0;
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static st_table *finalizer_table = 0;
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#define MARK_STACK_MAX 1024
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static VALUE mark_stack[MARK_STACK_MAX];
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static VALUE *mark_stack_ptr;
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static int mark_stack_overflow;
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#undef GC_DEBUG
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#if defined(_MSC_VER) || defined(__BORLANDC__) || defined(__CYGWIN__)
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#pragma pack(push, 1) /* magic for reducing sizeof(RVALUE): 24 -> 20 */
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#endif
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typedef struct RVALUE {
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union {
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struct {
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unsigned long flags; /* always 0 for freed obj */
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struct RVALUE *next;
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} free;
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struct RBasic basic;
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struct RObject object;
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struct RClass klass;
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struct RFloat flonum;
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struct RString string;
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struct RArray array;
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struct RRegexp regexp;
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struct RHash hash;
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struct RData data;
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struct RStruct rstruct;
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struct RBignum bignum;
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struct RFile file;
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struct RNode node;
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struct RMatch match;
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} as;
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#ifdef GC_DEBUG
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char *file;
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int line;
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#endif
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} RVALUE;
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#if defined(_MSC_VER) || defined(__BORLANDC__) || defined(__CYGWIN__)
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#pragma pack(pop)
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#endif
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static RVALUE *freelist = 0;
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static RVALUE *deferred_final_list = 0;
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#define HEAPS_INCREMENT 10
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static struct heaps_slot {
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void *membase;
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RVALUE *slot;
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int limit;
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} *heaps;
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static int heaps_length = 0;
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static int heaps_used = 0;
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#define HEAP_MIN_SLOTS 10000
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static int heap_slots = HEAP_MIN_SLOTS;
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#define FREE_MIN 4096
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static RVALUE *himem, *lomem;
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extern st_table *rb_class_tbl;
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VALUE *rb_gc_stack_start = 0;
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#ifdef __ia64
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VALUE *rb_gc_register_stack_start = 0;
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#endif
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int gc_stress = 0;
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#ifdef DJGPP
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/* set stack size (http://www.delorie.com/djgpp/v2faq/faq15_9.html) */
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unsigned int _stklen = 0x180000; /* 1.5 kB */
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#endif
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#if defined(DJGPP) || defined(_WIN32_WCE)
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static unsigned int STACK_LEVEL_MAX = 65535;
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#elif defined(__human68k__)
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unsigned int _stacksize = 262144;
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# define STACK_LEVEL_MAX (_stacksize - 4096)
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# undef HAVE_GETRLIMIT
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#elif defined(HAVE_GETRLIMIT) || defined(_WIN32)
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static unsigned int STACK_LEVEL_MAX = 655300;
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#else
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# define STACK_LEVEL_MAX 655300
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#endif
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static void run_final(VALUE obj);
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static int garbage_collect(void);
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void
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rb_global_variable(VALUE *var)
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{
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rb_gc_register_address(var);
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}
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void
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rb_memerror(void)
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{
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static int recurse = 0;
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if (!nomem_error || (recurse > 0 && rb_safe_level() < 4)) {
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fprintf(stderr, "[FATAL] failed to allocate memory\n");
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exit(1);
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}
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recurse++;
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rb_exc_raise(nomem_error);
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}
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/*
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* call-seq:
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* GC.stress => true or false
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*
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* returns current status of GC stress mode.
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*/
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static VALUE
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gc_stress_get(VALUE self)
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{
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return gc_stress ? Qtrue : Qfalse;
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}
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/*
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* call-seq:
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* GC.stress = bool => bool
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*
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* updates GC stress mode.
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*
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* When GC.stress = true, GC is invoked for all GC opportunity:
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* all memory and object allocation.
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*
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* Since it makes Ruby very slow, it is only for debugging.
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*/
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static VALUE
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gc_stress_set(VALUE self, VALUE bool)
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{
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rb_secure(2);
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gc_stress = RTEST(bool);
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return bool;
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}
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void *
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ruby_xmalloc(size_t size)
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{
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void *mem;
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if (size < 0) {
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rb_raise(rb_eNoMemError, "negative allocation size (or too big)");
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}
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if (size == 0) size = 1;
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malloc_increase += size;
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if (gc_stress || malloc_increase > malloc_limit) {
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garbage_collect();
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}
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RUBY_CRITICAL(mem = malloc(size));
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if (!mem) {
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if (garbage_collect()) {
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RUBY_CRITICAL(mem = malloc(size));
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}
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if (!mem) {
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rb_memerror();
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}
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}
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return mem;
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}
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void *
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ruby_xmalloc2(size_t n, size_t size)
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{
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long len = size * n;
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if (n != 0 && size != len / n) {
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rb_raise(rb_eArgError, "malloc: possible integer overflow");
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}
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return ruby_xmalloc(len);
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}
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void *
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ruby_xcalloc(size_t n, size_t size)
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{
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void *mem;
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mem = ruby_xmalloc2(n, size);
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memset(mem, 0, n * size);
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return mem;
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}
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void *
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ruby_xrealloc(void *ptr, size_t size)
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{
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void *mem;
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if (size < 0) {
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rb_raise(rb_eArgError, "negative re-allocation size");
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}
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if (!ptr) return ruby_xmalloc(size);
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if (size == 0) size = 1;
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malloc_increase += size;
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if (gc_stress) garbage_collect();
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RUBY_CRITICAL(mem = realloc(ptr, size));
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if (!mem) {
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if (garbage_collect()) {
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RUBY_CRITICAL(mem = realloc(ptr, size));
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}
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if (!mem) {
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rb_memerror();
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}
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}
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return mem;
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}
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void *
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ruby_xrealloc2(void *ptr, size_t n, size_t size)
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{
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size_t len = size * n;
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if (n != 0 && size != len / n) {
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rb_raise(rb_eArgError, "realloc: possible integer overflow");
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}
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return ruby_xrealloc(ptr, len);
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}
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void
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ruby_xfree(void *x)
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{
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if (x)
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RUBY_CRITICAL(free(x));
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}
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/*
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* call-seq:
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* GC.enable => true or false
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*
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* Enables garbage collection, returning <code>true</code> if garbage
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* collection was previously disabled.
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*
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* GC.disable #=> false
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* GC.enable #=> true
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* GC.enable #=> false
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*
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*/
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VALUE
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rb_gc_enable(void)
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{
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int old = dont_gc;
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dont_gc = Qfalse;
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return old;
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}
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/*
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* call-seq:
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* GC.disable => true or false
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*
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* Disables garbage collection, returning <code>true</code> if garbage
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* collection was already disabled.
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*
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* GC.disable #=> false
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* GC.disable #=> true
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*
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*/
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VALUE
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rb_gc_disable(void)
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{
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int old = dont_gc;
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dont_gc = Qtrue;
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return old;
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}
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VALUE rb_mGC;
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static struct gc_list {
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VALUE *varptr;
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struct gc_list *next;
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} *global_List = 0;
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void
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rb_gc_register_address(VALUE *addr)
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{
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struct gc_list *tmp;
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tmp = ALLOC(struct gc_list);
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tmp->next = global_List;
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tmp->varptr = addr;
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global_List = tmp;
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}
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void
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rb_register_mark_object(VALUE obj)
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{
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VALUE ary = GET_THREAD()->vm->mark_object_ary;
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rb_ary_push(ary, obj);
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}
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void
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rb_gc_unregister_address(VALUE *addr)
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{
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struct gc_list *tmp = global_List;
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if (tmp->varptr == addr) {
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global_List = tmp->next;
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RUBY_CRITICAL(free(tmp));
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return;
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}
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while (tmp->next) {
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if (tmp->next->varptr == addr) {
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struct gc_list *t = tmp->next;
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tmp->next = tmp->next->next;
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RUBY_CRITICAL(free(t));
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break;
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}
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tmp = tmp->next;
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}
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}
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static void
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add_heap(void)
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{
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RVALUE *p, *pend;
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if (heaps_used == heaps_length) {
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/* Realloc heaps */
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struct heaps_slot *p;
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int length;
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heaps_length += HEAPS_INCREMENT;
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length = heaps_length*sizeof(struct heaps_slot);
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RUBY_CRITICAL(
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if (heaps_used > 0) {
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p = (struct heaps_slot *)realloc(heaps, length);
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if (p) heaps = p;
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}
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else {
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p = heaps = (struct heaps_slot *)malloc(length);
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});
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if (p == 0) rb_memerror();
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}
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for (;;) {
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RUBY_CRITICAL(p = (RVALUE*)malloc(sizeof(RVALUE)*(heap_slots+1)));
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if (p == 0) {
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if (heap_slots == HEAP_MIN_SLOTS) {
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rb_memerror();
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}
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heap_slots = HEAP_MIN_SLOTS;
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continue;
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}
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heaps[heaps_used].membase = p;
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if ((VALUE)p % sizeof(RVALUE) == 0)
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heap_slots += 1;
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else
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p = (RVALUE*)((VALUE)p + sizeof(RVALUE) - ((VALUE)p % sizeof(RVALUE)));
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heaps[heaps_used].slot = p;
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heaps[heaps_used].limit = heap_slots;
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break;
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}
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pend = p + heap_slots;
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if (lomem == 0 || lomem > p) lomem = p;
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if (himem < pend) himem = pend;
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heaps_used++;
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heap_slots *= 1.8;
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while (p < pend) {
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p->as.free.flags = 0;
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p->as.free.next = freelist;
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freelist = p;
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p++;
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}
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}
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#define RANY(o) ((RVALUE*)(o))
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static VALUE
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rb_newobj_from_heap(void)
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{
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VALUE obj;
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if (gc_stress || !freelist) {
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if(!garbage_collect()) {
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rb_memerror();
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}
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}
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obj = (VALUE)freelist;
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freelist = freelist->as.free.next;
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MEMZERO((void*)obj, RVALUE, 1);
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#ifdef GC_DEBUG
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RANY(obj)->file = ruby_sourcefile;
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RANY(obj)->line = ruby_sourceline;
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#endif
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return obj;
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}
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#if USE_VALUE_CACHE
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static VALUE
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rb_fill_value_cache(yarv_thread_t *th)
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{
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int i;
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VALUE rv;
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// LOCK
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for (i=0; i<YARV_VALUE_CACHE_SIZE; i++) {
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VALUE v = rb_newobj_from_heap();
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th->value_cache[i] = v;
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RBASIC(v)->flags = FL_MARK;
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}
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th->value_cache_ptr = &th->value_cache[0];
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rv = rb_newobj_from_heap();
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// UNLOCK
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return rv;
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}
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#endif
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VALUE
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rb_newobj(void)
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{
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#if USE_VALUE_CACHE && 1
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yarv_thread_t *th = GET_THREAD();
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VALUE v = *th->value_cache_ptr;
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if (v) {
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RBASIC(v)->flags = 0;
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th->value_cache_ptr++;
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}
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else {
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v = rb_fill_value_cache(th);
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}
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#if defined(GC_DEBUG)
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printf("cache index: %d, v: %p, th: %p\n",
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th->value_cache_ptr - th->value_cache, v, th);
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#endif
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return v;
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#else
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return rb_newobj_from_heap();
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#endif
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}
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VALUE
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rb_data_object_alloc(VALUE klass, void *datap, RUBY_DATA_FUNC dmark, RUBY_DATA_FUNC dfree)
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{
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NEWOBJ(data, struct RData);
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if (klass) Check_Type(klass, T_CLASS);
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OBJSETUP(data, klass, T_DATA);
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data->data = datap;
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data->dfree = dfree;
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data->dmark = dmark;
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return (VALUE)data;
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}
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NOINLINE(void yarv_set_stack_end(VALUE **stack_end_p));
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#define YARV_SET_STACK_END yarv_set_stack_end(&th->machine_stack_end)
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#define STACK_START (th->machine_stack_start)
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#define STACK_END (th->machine_stack_end)
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#if defined(sparc) || defined(__sparc__)
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# define STACK_LENGTH (STACK_START - STACK_END + 0x80)
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#elif STACK_GROW_DIRECTION < 0
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# define STACK_LENGTH (STACK_START - STACK_END)
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#elif STACK_GROW_DIRECTION > 0
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# define STACK_LENGTH (STACK_END - STACK_START + 1)
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#else
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# define STACK_LENGTH ((STACK_END < STACK_START) ? STACK_START - STACK_END\
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: STACK_END - STACK_START + 1)
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#endif
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#if STACK_GROW_DIRECTION > 0
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# define STACK_UPPER(x, a, b) a
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#elif STACK_GROW_DIRECTION < 0
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# define STACK_UPPER(x, a, b) b
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#else
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static int grow_direction;
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static int
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stack_grow_direction(VALUE *addr)
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{
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yarv_thread_t *th = GET_THREAD();
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YARV_SET_STACK_END;
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if (STACK_END > addr) return grow_direction = 1;
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return grow_direction = -1;
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}
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# define stack_growup_p(x) ((grow_direction ? grow_direction : stack_grow_direction(x)) > 0)
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# define STACK_UPPER(x, a, b) (stack_growup_p(x) ? a : b)
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#endif
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#define GC_WATER_MARK 512
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|
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#define CHECK_STACK(ret) do {\
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YARV_SET_STACK_END;\
|
|
(ret) = (STACK_LENGTH > STACK_LEVEL_MAX + GC_WATER_MARK);\
|
|
} while (0)
|
|
|
|
int
|
|
ruby_stack_length(VALUE **p)
|
|
{
|
|
yarv_thread_t *th = GET_THREAD();
|
|
YARV_SET_STACK_END;
|
|
if (p) *p = STACK_UPPER(STACK_END, STACK_START, STACK_END);
|
|
return STACK_LENGTH;
|
|
}
|
|
|
|
int
|
|
ruby_stack_check(void)
|
|
{
|
|
int ret;
|
|
yarv_thread_t *th = GET_THREAD();
|
|
CHECK_STACK(ret);
|
|
return ret;
|
|
}
|
|
|
|
static void
|
|
init_mark_stack(void)
|
|
{
|
|
mark_stack_overflow = 0;
|
|
mark_stack_ptr = mark_stack;
|
|
}
|
|
|
|
#define MARK_STACK_EMPTY (mark_stack_ptr == mark_stack)
|
|
|
|
static st_table *source_filenames;
|
|
|
|
char *
|
|
rb_source_filename(const char *f)
|
|
{
|
|
char *name;
|
|
|
|
if (!st_lookup(source_filenames, (st_data_t)f, (st_data_t *)&name)) {
|
|
long len = strlen(f) + 1;
|
|
char *ptr = name = ALLOC_N(char, len + 1);
|
|
*ptr++ = 0;
|
|
MEMCPY(ptr, f, char, len);
|
|
st_add_direct(source_filenames, (st_data_t)ptr, (st_data_t)name);
|
|
return ptr;
|
|
}
|
|
return name + 1;
|
|
}
|
|
|
|
static void
|
|
mark_source_filename(char *f)
|
|
{
|
|
if (f) {
|
|
f[-1] = 1;
|
|
}
|
|
}
|
|
|
|
static int
|
|
sweep_source_filename(char *key, char *value)
|
|
{
|
|
if (*value) {
|
|
*value = 0;
|
|
return ST_CONTINUE;
|
|
}
|
|
else {
|
|
free(value);
|
|
return ST_DELETE;
|
|
}
|
|
}
|
|
|
|
static void gc_mark(VALUE ptr, int lev);
|
|
static void gc_mark_children(VALUE ptr, int lev);
|
|
|
|
static void
|
|
gc_mark_all(void)
|
|
{
|
|
RVALUE *p, *pend;
|
|
int i;
|
|
|
|
init_mark_stack();
|
|
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((VALUE)p, 0);
|
|
}
|
|
p++;
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
gc_mark_rest(void)
|
|
{
|
|
VALUE tmp_arry[MARK_STACK_MAX];
|
|
VALUE *p;
|
|
|
|
p = (mark_stack_ptr - mark_stack) + tmp_arry;
|
|
MEMCPY(tmp_arry, mark_stack, VALUE, MARK_STACK_MAX);
|
|
|
|
init_mark_stack();
|
|
while(p != tmp_arry){
|
|
p--;
|
|
gc_mark_children(*p, 0);
|
|
}
|
|
}
|
|
|
|
static inline int
|
|
is_pointer_to_heap(void *ptr)
|
|
{
|
|
register RVALUE *p = RANY(ptr);
|
|
register RVALUE *heap_org;
|
|
register long i;
|
|
|
|
if (p < lomem || p > himem) return Qfalse;
|
|
if ((VALUE)p % sizeof(RVALUE) != 0) return Qfalse;
|
|
|
|
/* check if p looks like a pointer */
|
|
for (i=0; i < heaps_used; i++) {
|
|
heap_org = heaps[i].slot;
|
|
if (heap_org <= p && p < heap_org + heaps[i].limit)
|
|
return Qtrue;
|
|
}
|
|
return Qfalse;
|
|
}
|
|
|
|
static void
|
|
mark_locations_array(register VALUE *x, register long n)
|
|
{
|
|
VALUE v;
|
|
while (n--) {
|
|
v = *x;
|
|
if (is_pointer_to_heap((void *)v)) {
|
|
gc_mark(v, 0);
|
|
}
|
|
x++;
|
|
}
|
|
}
|
|
|
|
void
|
|
rb_gc_mark_locations(VALUE *start, VALUE *end)
|
|
{
|
|
long n;
|
|
|
|
n = end - start;
|
|
mark_locations_array(start,n);
|
|
}
|
|
|
|
static int
|
|
mark_entry(ID key, VALUE value, int lev)
|
|
{
|
|
gc_mark(value, lev);
|
|
return ST_CONTINUE;
|
|
}
|
|
|
|
static void
|
|
mark_tbl(st_table *tbl, int lev)
|
|
{
|
|
if (!tbl) return;
|
|
st_foreach(tbl, mark_entry, lev);
|
|
}
|
|
|
|
void
|
|
rb_mark_tbl(st_table *tbl)
|
|
{
|
|
mark_tbl(tbl, 0);
|
|
}
|
|
|
|
static int
|
|
mark_keyvalue(VALUE key, VALUE value, int lev)
|
|
{
|
|
gc_mark(key, lev);
|
|
gc_mark(value, lev);
|
|
return ST_CONTINUE;
|
|
}
|
|
|
|
static void
|
|
mark_hash(st_table *tbl, int lev)
|
|
{
|
|
if (!tbl) return;
|
|
st_foreach(tbl, mark_keyvalue, lev);
|
|
}
|
|
|
|
void
|
|
rb_mark_hash(st_table *tbl)
|
|
{
|
|
mark_hash(tbl, 0);
|
|
}
|
|
|
|
void
|
|
rb_gc_mark_maybe(VALUE obj)
|
|
{
|
|
if (is_pointer_to_heap((void *)obj)) {
|
|
gc_mark(obj, 0);
|
|
}
|
|
}
|
|
|
|
#define GC_LEVEL_MAX 250
|
|
|
|
static void
|
|
gc_mark(VALUE ptr, int lev)
|
|
{
|
|
register RVALUE *obj;
|
|
|
|
obj = RANY(ptr);
|
|
if (rb_special_const_p(ptr)) return; /* special const not marked */
|
|
if (obj->as.basic.flags == 0) return; /* free cell */
|
|
if (obj->as.basic.flags & FL_MARK) return; /* already marked */
|
|
obj->as.basic.flags |= FL_MARK;
|
|
|
|
if (lev > GC_LEVEL_MAX || (lev == 0 && ruby_stack_check())) {
|
|
if (!mark_stack_overflow) {
|
|
if (mark_stack_ptr - mark_stack < MARK_STACK_MAX) {
|
|
*mark_stack_ptr = ptr;
|
|
mark_stack_ptr++;
|
|
}
|
|
else {
|
|
mark_stack_overflow = 1;
|
|
}
|
|
}
|
|
return;
|
|
}
|
|
gc_mark_children(ptr, lev+1);
|
|
}
|
|
|
|
void
|
|
rb_gc_mark(VALUE ptr)
|
|
{
|
|
gc_mark(ptr, 0);
|
|
}
|
|
|
|
static void
|
|
gc_mark_children(VALUE ptr, int lev)
|
|
{
|
|
register RVALUE *obj = RANY(ptr);
|
|
|
|
goto marking; /* skip */
|
|
|
|
again:
|
|
obj = RANY(ptr);
|
|
if (rb_special_const_p(ptr)) return; /* special const not marked */
|
|
if (obj->as.basic.flags == 0) return; /* free cell */
|
|
if (obj->as.basic.flags & FL_MARK) return; /* already marked */
|
|
obj->as.basic.flags |= FL_MARK;
|
|
|
|
marking:
|
|
if (FL_TEST(obj, FL_EXIVAR)) {
|
|
rb_mark_generic_ivar(ptr);
|
|
}
|
|
|
|
switch (obj->as.basic.flags & T_MASK) {
|
|
case T_NIL:
|
|
case T_FIXNUM:
|
|
rb_bug("rb_gc_mark() called for broken object");
|
|
break;
|
|
|
|
case T_NODE:
|
|
mark_source_filename(obj->as.node.nd_file);
|
|
switch (nd_type(obj)) {
|
|
case NODE_IF: /* 1,2,3 */
|
|
case NODE_FOR:
|
|
case NODE_ITER:
|
|
case NODE_CREF:
|
|
case NODE_WHEN:
|
|
case NODE_MASGN:
|
|
case NODE_RESCUE:
|
|
case NODE_RESBODY:
|
|
case NODE_CLASS:
|
|
case NODE_ARGS:
|
|
case NODE_BLOCK_PASS:
|
|
gc_mark((VALUE)obj->as.node.u2.node, lev);
|
|
/* fall through */
|
|
case NODE_BLOCK: /* 1,3 */
|
|
case NODE_OPTBLOCK:
|
|
case NODE_ARRAY:
|
|
case NODE_DSTR:
|
|
case NODE_DXSTR:
|
|
case NODE_DREGX:
|
|
case NODE_DREGX_ONCE:
|
|
case NODE_ENSURE:
|
|
case NODE_CALL:
|
|
case NODE_DEFS:
|
|
case NODE_OP_ASGN1:
|
|
gc_mark((VALUE)obj->as.node.u1.node, lev);
|
|
/* fall through */
|
|
case NODE_SUPER: /* 3 */
|
|
case NODE_FCALL:
|
|
case NODE_DEFN:
|
|
ptr = (VALUE)obj->as.node.u3.node;
|
|
goto again;
|
|
|
|
case NODE_METHOD: /* 1,2 */
|
|
case NODE_WHILE:
|
|
case NODE_UNTIL:
|
|
case NODE_AND:
|
|
case NODE_OR:
|
|
case NODE_CASE:
|
|
case NODE_SCLASS:
|
|
case NODE_DOT2:
|
|
case NODE_DOT3:
|
|
case NODE_FLIP2:
|
|
case NODE_FLIP3:
|
|
case NODE_MATCH2:
|
|
case NODE_MATCH3:
|
|
case NODE_OP_ASGN_OR:
|
|
case NODE_OP_ASGN_AND:
|
|
case NODE_MODULE:
|
|
case NODE_ALIAS:
|
|
case NODE_VALIAS:
|
|
gc_mark((VALUE)obj->as.node.u1.node, lev);
|
|
/* fall through */
|
|
case NODE_FBODY: /* 2 */
|
|
case NODE_NOT:
|
|
case NODE_GASGN:
|
|
case NODE_LASGN:
|
|
case NODE_DASGN:
|
|
case NODE_DASGN_CURR:
|
|
case NODE_IASGN:
|
|
case NODE_CVDECL:
|
|
case NODE_CVASGN:
|
|
case NODE_COLON3:
|
|
case NODE_OPT_N:
|
|
case NODE_EVSTR:
|
|
case NODE_UNDEF:
|
|
case NODE_POSTEXE:
|
|
ptr = (VALUE)obj->as.node.u2.node;
|
|
goto again;
|
|
|
|
case NODE_HASH: /* 1 */
|
|
case NODE_LIT:
|
|
case NODE_STR:
|
|
case NODE_XSTR:
|
|
case NODE_DEFINED:
|
|
case NODE_MATCH:
|
|
case NODE_RETURN:
|
|
case NODE_BREAK:
|
|
case NODE_NEXT:
|
|
case NODE_YIELD:
|
|
case NODE_COLON2:
|
|
case NODE_SPLAT:
|
|
case NODE_TO_ARY:
|
|
ptr = (VALUE)obj->as.node.u1.node;
|
|
goto again;
|
|
|
|
case NODE_SCOPE: /* 2,3 */
|
|
case NODE_CDECL:
|
|
gc_mark((VALUE)obj->as.node.u3.node, lev);
|
|
ptr = (VALUE)obj->as.node.u2.node;
|
|
goto again;
|
|
|
|
case NODE_ZARRAY: /* - */
|
|
case NODE_ZSUPER:
|
|
case NODE_CFUNC:
|
|
case NODE_VCALL:
|
|
case NODE_GVAR:
|
|
case NODE_LVAR:
|
|
case NODE_DVAR:
|
|
case NODE_IVAR:
|
|
case NODE_CVAR:
|
|
case NODE_NTH_REF:
|
|
case NODE_BACK_REF:
|
|
case NODE_REDO:
|
|
case NODE_RETRY:
|
|
case NODE_SELF:
|
|
case NODE_NIL:
|
|
case NODE_TRUE:
|
|
case NODE_FALSE:
|
|
case NODE_ERRINFO:
|
|
case NODE_ATTRSET:
|
|
case NODE_BLOCK_ARG:
|
|
break;
|
|
case NODE_ALLOCA:
|
|
mark_locations_array((VALUE*)obj->as.node.u1.value,
|
|
obj->as.node.u3.cnt);
|
|
ptr = (VALUE)obj->as.node.u2.node;
|
|
goto again;
|
|
|
|
default: /* unlisted NODE */
|
|
if (is_pointer_to_heap(obj->as.node.u1.node)) {
|
|
gc_mark((VALUE)obj->as.node.u1.node, lev);
|
|
}
|
|
if (is_pointer_to_heap(obj->as.node.u2.node)) {
|
|
gc_mark((VALUE)obj->as.node.u2.node, lev);
|
|
}
|
|
if (is_pointer_to_heap(obj->as.node.u3.node)) {
|
|
gc_mark((VALUE)obj->as.node.u3.node, lev);
|
|
}
|
|
}
|
|
return; /* no need to mark class. */
|
|
}
|
|
|
|
gc_mark(obj->as.basic.klass, lev);
|
|
switch (obj->as.basic.flags & T_MASK) {
|
|
case T_ICLASS:
|
|
case T_CLASS:
|
|
case T_MODULE:
|
|
mark_tbl(obj->as.klass.m_tbl, lev);
|
|
mark_tbl(obj->as.klass.iv_tbl, lev);
|
|
ptr = obj->as.klass.super;
|
|
goto again;
|
|
|
|
case T_ARRAY:
|
|
if (FL_TEST(obj, ELTS_SHARED)) {
|
|
ptr = obj->as.array.aux.shared;
|
|
goto again;
|
|
}
|
|
else {
|
|
long i, len = RARRAY_LEN(obj);
|
|
VALUE *ptr = RARRAY_PTR(obj);
|
|
for (i=0; i < len; i++) {
|
|
gc_mark(*ptr++, lev);
|
|
}
|
|
}
|
|
break;
|
|
|
|
case T_HASH:
|
|
mark_hash(obj->as.hash.tbl, lev);
|
|
ptr = obj->as.hash.ifnone;
|
|
goto again;
|
|
|
|
case T_STRING:
|
|
#define STR_ASSOC FL_USER3 /* copied from string.c */
|
|
if (FL_TEST(obj, RSTRING_NOEMBED) && FL_ANY(obj, ELTS_SHARED|STR_ASSOC)) {
|
|
ptr = obj->as.string.as.heap.aux.shared;
|
|
goto again;
|
|
}
|
|
break;
|
|
|
|
case T_DATA:
|
|
if (obj->as.data.dmark) (*obj->as.data.dmark)(DATA_PTR(obj));
|
|
break;
|
|
|
|
case T_OBJECT:
|
|
mark_tbl(obj->as.object.iv_tbl, lev);
|
|
break;
|
|
|
|
case T_FILE:
|
|
case T_REGEXP:
|
|
case T_FLOAT:
|
|
case T_BIGNUM:
|
|
case T_BLOCK:
|
|
break;
|
|
|
|
case T_MATCH:
|
|
gc_mark(obj->as.match.regexp, lev);
|
|
if (obj->as.match.str) {
|
|
ptr = obj->as.match.str;
|
|
goto again;
|
|
}
|
|
break;
|
|
|
|
case T_STRUCT:
|
|
{
|
|
long len = RSTRUCT_LEN(obj);
|
|
VALUE *ptr = RSTRUCT_PTR(obj);
|
|
|
|
while (len--) {
|
|
gc_mark(*ptr++, lev);
|
|
}
|
|
}
|
|
break;
|
|
|
|
case T_VALUES:
|
|
{
|
|
rb_gc_mark(RVALUES(obj)->v1);
|
|
rb_gc_mark(RVALUES(obj)->v2);
|
|
ptr = RVALUES(obj)->v3;
|
|
goto again;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
rb_bug("rb_gc_mark(): unknown data type 0x%lx(%p) %s",
|
|
obj->as.basic.flags & T_MASK, obj,
|
|
is_pointer_to_heap(obj) ? "corrupted object" : "non object");
|
|
}
|
|
}
|
|
|
|
static void obj_free(VALUE);
|
|
|
|
static void
|
|
finalize_list(RVALUE *p)
|
|
{
|
|
while (p) {
|
|
RVALUE *tmp = p->as.free.next;
|
|
run_final((VALUE)p);
|
|
if (!FL_TEST(p, FL_SINGLETON)) { /* not freeing page */
|
|
p->as.free.flags = 0;
|
|
p->as.free.next = freelist;
|
|
freelist = p;
|
|
}
|
|
p = tmp;
|
|
}
|
|
}
|
|
|
|
static void
|
|
free_unused_heaps(void)
|
|
{
|
|
int i, j;
|
|
|
|
for (i = j = 1; j < heaps_used; i++) {
|
|
if (heaps[i].limit == 0) {
|
|
free(heaps[i].membase);
|
|
heaps_used--;
|
|
}
|
|
else {
|
|
if (i != j) {
|
|
heaps[j] = heaps[i];
|
|
}
|
|
j++;
|
|
}
|
|
}
|
|
}
|
|
|
|
void rb_gc_abort_threads(void);
|
|
|
|
static void
|
|
gc_sweep(void)
|
|
{
|
|
RVALUE *p, *pend, *final_list;
|
|
int freed = 0;
|
|
int i;
|
|
unsigned long live = 0;
|
|
|
|
mark_source_filename(ruby_sourcefile);
|
|
if (source_filenames) {
|
|
st_foreach(source_filenames, sweep_source_filename, 0);
|
|
}
|
|
|
|
freelist = 0;
|
|
final_list = deferred_final_list;
|
|
deferred_final_list = 0;
|
|
for (i = 0; i < heaps_used; i++) {
|
|
int n = 0;
|
|
RVALUE *free = freelist;
|
|
RVALUE *final = final_list;
|
|
|
|
p = heaps[i].slot; pend = p + heaps[i].limit;
|
|
while (p < pend) {
|
|
if (!(p->as.basic.flags & FL_MARK)) {
|
|
if (p->as.basic.flags) {
|
|
obj_free((VALUE)p);
|
|
}
|
|
if (need_call_final && FL_TEST(p, FL_FINALIZE)) {
|
|
p->as.free.flags = FL_MARK; /* remain marked */
|
|
p->as.free.next = final_list;
|
|
final_list = p;
|
|
}
|
|
else {
|
|
p->as.free.flags = 0;
|
|
p->as.free.next = freelist;
|
|
freelist = p;
|
|
}
|
|
n++;
|
|
}
|
|
else if (RBASIC(p)->flags == FL_MARK) {
|
|
/* objects to be finalized */
|
|
/* do nothing remain marked */
|
|
}
|
|
else {
|
|
RBASIC(p)->flags &= ~FL_MARK;
|
|
live++;
|
|
}
|
|
p++;
|
|
}
|
|
if (n == heaps[i].limit && freed > FREE_MIN) {
|
|
RVALUE *pp;
|
|
|
|
heaps[i].limit = 0;
|
|
for (pp = final_list; pp != final; pp = pp->as.free.next) {
|
|
p->as.free.flags |= FL_SINGLETON; /* freeing page mark */
|
|
}
|
|
freelist = free; /* cancel this page from freelist */
|
|
}
|
|
else {
|
|
freed += n;
|
|
}
|
|
}
|
|
if (malloc_increase > malloc_limit) {
|
|
malloc_limit += (malloc_increase - malloc_limit) * (double)live / (live + freed);
|
|
if (malloc_limit < GC_MALLOC_LIMIT) malloc_limit = GC_MALLOC_LIMIT;
|
|
}
|
|
malloc_increase = 0;
|
|
if (freed < FREE_MIN) {
|
|
add_heap();
|
|
}
|
|
during_gc = 0;
|
|
|
|
/* clear finalization list */
|
|
if (final_list) {
|
|
deferred_final_list = final_list;
|
|
return;
|
|
}
|
|
free_unused_heaps();
|
|
}
|
|
|
|
void
|
|
rb_gc_force_recycle(VALUE p)
|
|
{
|
|
RANY(p)->as.free.flags = 0;
|
|
RANY(p)->as.free.next = freelist;
|
|
freelist = RANY(p);
|
|
}
|
|
|
|
static void
|
|
obj_free(VALUE obj)
|
|
{
|
|
switch (RANY(obj)->as.basic.flags & T_MASK) {
|
|
case T_NIL:
|
|
case T_FIXNUM:
|
|
case T_TRUE:
|
|
case T_FALSE:
|
|
rb_bug("obj_free() called for broken object");
|
|
break;
|
|
}
|
|
|
|
if (FL_TEST(obj, FL_EXIVAR)) {
|
|
rb_free_generic_ivar((VALUE)obj);
|
|
}
|
|
|
|
switch (RANY(obj)->as.basic.flags & T_MASK) {
|
|
case T_OBJECT:
|
|
if (RANY(obj)->as.object.iv_tbl) {
|
|
st_free_table(RANY(obj)->as.object.iv_tbl);
|
|
}
|
|
break;
|
|
case T_MODULE:
|
|
case T_CLASS:
|
|
rb_clear_cache_by_class((VALUE)obj);
|
|
st_free_table(RANY(obj)->as.klass.m_tbl);
|
|
if (RANY(obj)->as.object.iv_tbl) {
|
|
st_free_table(RANY(obj)->as.object.iv_tbl);
|
|
}
|
|
break;
|
|
case T_STRING:
|
|
rb_str_free(obj);
|
|
break;
|
|
case T_ARRAY:
|
|
rb_ary_free(obj);
|
|
break;
|
|
case T_HASH:
|
|
if (RANY(obj)->as.hash.tbl) {
|
|
st_free_table(RANY(obj)->as.hash.tbl);
|
|
}
|
|
break;
|
|
case T_REGEXP:
|
|
if (RANY(obj)->as.regexp.ptr) {
|
|
onig_free(RANY(obj)->as.regexp.ptr);
|
|
}
|
|
if (RANY(obj)->as.regexp.str) {
|
|
RUBY_CRITICAL(free(RANY(obj)->as.regexp.str));
|
|
}
|
|
break;
|
|
case T_DATA:
|
|
if (DATA_PTR(obj)) {
|
|
if ((long)RANY(obj)->as.data.dfree == -1) {
|
|
RUBY_CRITICAL(free(DATA_PTR(obj)));
|
|
}
|
|
else if (RANY(obj)->as.data.dfree) {
|
|
(*RANY(obj)->as.data.dfree)(DATA_PTR(obj));
|
|
}
|
|
}
|
|
break;
|
|
case T_MATCH:
|
|
if (RANY(obj)->as.match.regs) {
|
|
onig_region_free(RANY(obj)->as.match.regs, 0);
|
|
RUBY_CRITICAL(free(RANY(obj)->as.match.regs));
|
|
}
|
|
break;
|
|
case T_FILE:
|
|
if (RANY(obj)->as.file.fptr) {
|
|
rb_io_fptr_finalize(RANY(obj)->as.file.fptr);
|
|
}
|
|
break;
|
|
case T_ICLASS:
|
|
/* iClass shares table with the module */
|
|
break;
|
|
|
|
case T_FLOAT:
|
|
case T_BLOCK:
|
|
break;
|
|
case T_VALUES:
|
|
break;
|
|
|
|
case T_BIGNUM:
|
|
if (RANY(obj)->as.bignum.digits) {
|
|
RUBY_CRITICAL(free(RANY(obj)->as.bignum.digits));
|
|
}
|
|
break;
|
|
case T_NODE:
|
|
switch (nd_type(obj)) {
|
|
case NODE_SCOPE:
|
|
if (RANY(obj)->as.node.u1.tbl) {
|
|
RUBY_CRITICAL(free(RANY(obj)->as.node.u1.tbl));
|
|
}
|
|
break;
|
|
case NODE_ALLOCA:
|
|
RUBY_CRITICAL(free(RANY(obj)->as.node.u1.node));
|
|
break;
|
|
}
|
|
return; /* no need to free iv_tbl */
|
|
|
|
case T_STRUCT:
|
|
if (RBASIC(obj)->flags & RSTRUCT_EMBED_LEN_MASK == 0 &&
|
|
RANY(obj)->as.rstruct.as.heap.ptr) {
|
|
RUBY_CRITICAL(free(RANY(obj)->as.rstruct.as.heap.ptr));
|
|
}
|
|
break;
|
|
|
|
default:
|
|
rb_bug("gc_sweep(): unknown data type 0x%lx(%p)",
|
|
RANY(obj)->as.basic.flags & T_MASK, (void*)obj);
|
|
}
|
|
}
|
|
|
|
#ifdef __GNUC__
|
|
#if defined(__human68k__) || defined(DJGPP)
|
|
#if defined(__human68k__)
|
|
typedef unsigned long rb_jmp_buf[8];
|
|
__asm__ (".even\n\
|
|
_rb_setjmp:\n\
|
|
move.l 4(sp),a0\n\
|
|
movem.l d3-d7/a3-a5,(a0)\n\
|
|
moveq.l #0,d0\n\
|
|
rts");
|
|
#ifdef setjmp
|
|
#undef setjmp
|
|
#endif
|
|
#else
|
|
#if defined(DJGPP)
|
|
typedef unsigned long rb_jmp_buf[6];
|
|
__asm__ (".align 4\n\
|
|
_rb_setjmp:\n\
|
|
pushl %ebp\n\
|
|
movl %esp,%ebp\n\
|
|
movl 8(%ebp),%ebp\n\
|
|
movl %eax,(%ebp)\n\
|
|
movl %ebx,4(%ebp)\n\
|
|
movl %ecx,8(%ebp)\n\
|
|
movl %edx,12(%ebp)\n\
|
|
movl %esi,16(%ebp)\n\
|
|
movl %edi,20(%ebp)\n\
|
|
popl %ebp\n\
|
|
xorl %eax,%eax\n\
|
|
ret");
|
|
#endif
|
|
#endif
|
|
int rb_setjmp (rb_jmp_buf);
|
|
#define jmp_buf rb_jmp_buf
|
|
#define setjmp rb_setjmp
|
|
#endif /* __human68k__ or DJGPP */
|
|
#endif /* __GNUC__ */
|
|
|
|
#define GC_NOTIFY 0
|
|
|
|
static int
|
|
garbage_collect(void)
|
|
{
|
|
struct gc_list *list;
|
|
jmp_buf save_regs_gc_mark;
|
|
yarv_thread_t *th = GET_THREAD();
|
|
|
|
if (GC_NOTIFY) printf("start garbage_collect()\n");
|
|
|
|
if (!heaps) {
|
|
return Qfalse;
|
|
}
|
|
|
|
if (dont_gc || during_gc) {
|
|
if (!freelist) {
|
|
add_heap();
|
|
}
|
|
return Qtrue;
|
|
}
|
|
during_gc++;
|
|
|
|
YARV_SET_STACK_END;
|
|
|
|
init_mark_stack();
|
|
|
|
rb_gc_mark(th->vm->self);
|
|
rb_gc_mark(th->vm->mark_object_ary);
|
|
|
|
if (finalizer_table) {
|
|
mark_tbl(finalizer_table, 0);
|
|
}
|
|
|
|
FLUSH_REGISTER_WINDOWS;
|
|
/* This assumes that all registers are saved into the jmp_buf (and stack) */
|
|
setjmp(save_regs_gc_mark);
|
|
mark_locations_array((VALUE*)save_regs_gc_mark, sizeof(save_regs_gc_mark) / sizeof(VALUE *));
|
|
|
|
#if STACK_GROW_DIRECTION < 0
|
|
rb_gc_mark_locations(th->machine_stack_end, th->machine_stack_start);
|
|
#elif STACK_GROW_DIRECTION > 0
|
|
rb_gc_mark_locations(th->machin_stack_start, th->machine_stack_end + 1);
|
|
#else
|
|
if (th->machine_stack_end < th->machin_stack_start)
|
|
rb_gc_mark_locations(th->machine_stack_end, th->machin_stack_start);
|
|
else
|
|
rb_gc_mark_locations(th->machin_stack_start, th->machine_stack_end + 1);
|
|
#endif
|
|
#ifdef __ia64__
|
|
/* mark backing store (flushed register window on the stack) */
|
|
/* the basic idea from guile GC code */
|
|
{
|
|
ucontext_t ctx;
|
|
VALUE *top, *bot;
|
|
#if defined(HAVE_UNWIND_H) && defined(HAVE__UNW_CREATECONTEXTFORSELF)
|
|
_Unwind_Context *unwctx = _UNW_createContextForSelf();
|
|
#endif
|
|
|
|
getcontext(&ctx);
|
|
mark_locations_array((VALUE*)&ctx.uc_mcontext,
|
|
((size_t)(sizeof(VALUE)-1 + sizeof ctx.uc_mcontext)/sizeof(VALUE)));
|
|
#if defined(HAVE_UNWIND_H) && defined(HAVE__UNW_CREATECONTEXTFORSELF)
|
|
_UNW_currentContext(unwctx);
|
|
bot = (VALUE*)(long)_UNW_getAR(unwctx, _UNW_AR_BSP);
|
|
top = (VALUE*)(long)_UNW_getAR(unwctx, _UNW_AR_BSPSTORE);
|
|
_UNW_destroyContext(unwctx);
|
|
#else
|
|
bot = (VALUE*)__libc_ia64_register_backing_store_base;
|
|
top = (VALUE*)ctx.uc_mcontext.IA64_BSPSTORE;
|
|
#endif
|
|
rb_gc_mark_locations(bot, top);
|
|
}
|
|
#endif
|
|
#if defined(__human68k__) || defined(__mc68000__)
|
|
rb_gc_mark_locations((VALUE*)((char*)STACK_END + 2),
|
|
(VALUE*)((char*)STACK_START + 2));
|
|
#endif
|
|
rb_gc_mark_threads();
|
|
rb_gc_mark_symbols();
|
|
|
|
/* mark protected global variables */
|
|
for (list = global_List; list; list = list->next) {
|
|
rb_gc_mark_maybe(*list->varptr);
|
|
}
|
|
rb_mark_end_proc();
|
|
rb_gc_mark_global_tbl();
|
|
|
|
rb_mark_tbl(rb_class_tbl);
|
|
rb_gc_mark_trap_list();
|
|
|
|
/* mark generic instance variables for special constants */
|
|
rb_mark_generic_ivar_tbl();
|
|
|
|
rb_gc_mark_parser();
|
|
|
|
/* gc_mark objects whose marking are not completed*/
|
|
while (!MARK_STACK_EMPTY){
|
|
if (mark_stack_overflow){
|
|
gc_mark_all();
|
|
}
|
|
else {
|
|
gc_mark_rest();
|
|
}
|
|
}
|
|
|
|
gc_sweep();
|
|
if (GC_NOTIFY) printf("end garbage_collect()\n");
|
|
return Qtrue;
|
|
}
|
|
|
|
void
|
|
yarv_machine_stack_mark(yarv_thread_t *th)
|
|
{
|
|
#if STACK_GROW_DIRECTION < 0
|
|
rb_gc_mark_locations(th->machine_stack_end, th->machine_stack_start);
|
|
#elif STACK_GROW_DIRECTION > 0
|
|
rb_gc_mark_locations(th->machin_stack_start, th->machine_stack_end);
|
|
#else
|
|
if (th->machin_stack_start < th->machine_stack_end) {
|
|
rb_gc_mark_locations(th->machin_stack_start, th->machine_stack_end);
|
|
}
|
|
else {
|
|
rb_gc_mark_locations(th->machine_stack_end, th->machine_stack_start);
|
|
}
|
|
#endif
|
|
}
|
|
|
|
|
|
void
|
|
rb_gc(void)
|
|
{
|
|
garbage_collect();
|
|
rb_gc_finalize_deferred();
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* GC.start => nil
|
|
* gc.garbage_collect => nil
|
|
* ObjectSpace.garbage_collect => nil
|
|
*
|
|
* Initiates garbage collection, unless manually disabled.
|
|
*
|
|
*/
|
|
|
|
VALUE
|
|
rb_gc_start(void)
|
|
{
|
|
rb_gc();
|
|
return Qnil;
|
|
}
|
|
|
|
void
|
|
ruby_set_stack_size(size_t size)
|
|
{
|
|
#ifndef STACK_LEVEL_MAX
|
|
STACK_LEVEL_MAX = size/sizeof(VALUE);
|
|
#endif
|
|
}
|
|
|
|
void
|
|
Init_stack(VALUE *addr)
|
|
{
|
|
#ifdef __ia64
|
|
if (rb_gc_register_stack_start == 0) {
|
|
# if defined(__FreeBSD__)
|
|
/*
|
|
* FreeBSD/ia64 currently does not have a way for a process to get the
|
|
* base address for the RSE backing store, so hardcode it.
|
|
*/
|
|
rb_gc_register_stack_start = (4ULL<<61);
|
|
# elif defined(HAVE___LIBC_IA64_REGISTER_BACKING_STORE_BASE)
|
|
# pragma weak __libc_ia64_register_backing_store_base
|
|
extern unsigned long __libc_ia64_register_backing_store_base;
|
|
rb_gc_register_stack_start = (VALUE*)__libc_ia64_register_backing_store_base;
|
|
# endif
|
|
}
|
|
{
|
|
VALUE *bsp = (VALUE*)rb_ia64_bsp();
|
|
if (rb_gc_register_stack_start == 0 ||
|
|
bsp < rb_gc_register_stack_start) {
|
|
rb_gc_register_stack_start = bsp;
|
|
}
|
|
}
|
|
#endif
|
|
#if defined(_WIN32) || defined(__CYGWIN__)
|
|
MEMORY_BASIC_INFORMATION m;
|
|
memset(&m, 0, sizeof(m));
|
|
VirtualQuery(&m, &m, sizeof(m));
|
|
rb_gc_stack_start =
|
|
STACK_UPPER((VALUE *)&m, (VALUE *)m.BaseAddress,
|
|
(VALUE *)((char *)m.BaseAddress + m.RegionSize) - 1);
|
|
#elif defined(STACK_END_ADDRESS)
|
|
{
|
|
extern void *STACK_END_ADDRESS;
|
|
rb_gc_stack_start = STACK_END_ADDRESS;
|
|
}
|
|
#else
|
|
if (!addr) addr = (VALUE *)&addr;
|
|
STACK_UPPER(&addr, addr, ++addr);
|
|
if (rb_gc_stack_start) {
|
|
if (STACK_UPPER(&addr,
|
|
rb_gc_stack_start > addr,
|
|
rb_gc_stack_start < addr))
|
|
rb_gc_stack_start = addr;
|
|
return;
|
|
}
|
|
rb_gc_stack_start = addr;
|
|
#endif
|
|
#ifdef HAVE_GETRLIMIT
|
|
{
|
|
struct rlimit rlim;
|
|
|
|
if (getrlimit(RLIMIT_STACK, &rlim) == 0) {
|
|
unsigned int space = rlim.rlim_cur/5;
|
|
|
|
if (space > 1024*1024) space = 1024*1024;
|
|
STACK_LEVEL_MAX = (rlim.rlim_cur - space) / sizeof(VALUE);
|
|
}
|
|
}
|
|
#endif
|
|
}
|
|
|
|
void ruby_init_stack(VALUE *addr
|
|
#ifdef __ia64
|
|
, void *bsp
|
|
#endif
|
|
)
|
|
{
|
|
if (!rb_gc_stack_start ||
|
|
STACK_UPPER(&addr,
|
|
rb_gc_stack_start > addr,
|
|
rb_gc_stack_start < addr)) {
|
|
rb_gc_stack_start = addr;
|
|
}
|
|
#ifdef __ia64
|
|
if (!rb_gc_register_stack_start ||
|
|
(VALUE*)bsp < rb_gc_register_stack_start) {
|
|
rb_gc_register_stack_start = (VALUE*)bsp;
|
|
}
|
|
#endif
|
|
#ifdef HAVE_GETRLIMIT
|
|
{
|
|
struct rlimit rlim;
|
|
|
|
if (getrlimit(RLIMIT_STACK, &rlim) == 0) {
|
|
unsigned int space = rlim.rlim_cur/5;
|
|
|
|
if (space > 1024*1024) space = 1024*1024;
|
|
STACK_LEVEL_MAX = (rlim.rlim_cur - space) / sizeof(VALUE);
|
|
}
|
|
}
|
|
#elif defined _WIN32
|
|
{
|
|
MEMORY_BASIC_INFORMATION mi;
|
|
DWORD size;
|
|
DWORD space;
|
|
|
|
if (VirtualQuery(&mi, &mi, sizeof(mi))) {
|
|
size = (char *)mi.BaseAddress - (char *)mi.AllocationBase;
|
|
space = size / 5;
|
|
if (space > 1024*1024) space = 1024*1024;
|
|
STACK_LEVEL_MAX = (size - space) / sizeof(VALUE);
|
|
}
|
|
}
|
|
#endif
|
|
}
|
|
|
|
/*
|
|
* Document-class: ObjectSpace
|
|
*
|
|
* The <code>ObjectSpace</code> module contains a number of routines
|
|
* that interact with the garbage collection facility and allow you to
|
|
* traverse all living objects with an iterator.
|
|
*
|
|
* <code>ObjectSpace</code> also provides support for object
|
|
* finalizers, procs that will be called when a specific object is
|
|
* about to be destroyed by garbage collection.
|
|
*
|
|
* include ObjectSpace
|
|
*
|
|
*
|
|
* a = "A"
|
|
* b = "B"
|
|
* c = "C"
|
|
*
|
|
*
|
|
* define_finalizer(a, proc {|id| puts "Finalizer one on #{id}" })
|
|
* define_finalizer(a, proc {|id| puts "Finalizer two on #{id}" })
|
|
* define_finalizer(b, proc {|id| puts "Finalizer three on #{id}" })
|
|
*
|
|
* <em>produces:</em>
|
|
*
|
|
* Finalizer three on 537763470
|
|
* Finalizer one on 537763480
|
|
* Finalizer two on 537763480
|
|
*
|
|
*/
|
|
|
|
void
|
|
Init_heap(void)
|
|
{
|
|
if (!rb_gc_stack_start) {
|
|
Init_stack(0);
|
|
}
|
|
add_heap();
|
|
}
|
|
|
|
static VALUE
|
|
os_live_obj(void)
|
|
{
|
|
int i;
|
|
int n = 0;
|
|
|
|
for (i = 0; i < heaps_used; i++) {
|
|
RVALUE *p, *pend;
|
|
|
|
p = heaps[i].slot; pend = p + heaps[i].limit;
|
|
for (;p < pend; p++) {
|
|
if (p->as.basic.flags) {
|
|
switch (TYPE(p)) {
|
|
case T_ICLASS:
|
|
case T_NODE:
|
|
continue;
|
|
case T_CLASS:
|
|
if (FL_TEST(p, FL_SINGLETON)) continue;
|
|
default:
|
|
if (!p->as.basic.klass) continue;
|
|
rb_yield((VALUE)p);
|
|
n++;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
return INT2FIX(n);
|
|
}
|
|
|
|
static VALUE
|
|
os_obj_of(VALUE of)
|
|
{
|
|
int i;
|
|
int n = 0;
|
|
|
|
for (i = 0; i < heaps_used; i++) {
|
|
RVALUE *p, *pend;
|
|
|
|
p = heaps[i].slot; pend = p + heaps[i].limit;
|
|
for (;p < pend; p++) {
|
|
if (p->as.basic.flags) {
|
|
switch (TYPE(p)) {
|
|
case T_ICLASS:
|
|
case T_NODE:
|
|
continue;
|
|
case T_CLASS:
|
|
if (FL_TEST(p, FL_SINGLETON)) continue;
|
|
default:
|
|
if (!p->as.basic.klass) continue;
|
|
if (rb_obj_is_kind_of((VALUE)p, of)) {
|
|
rb_yield((VALUE)p);
|
|
n++;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
return INT2FIX(n);
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* ObjectSpace.each_object([module]) {|obj| ... } => fixnum
|
|
*
|
|
* Calls the block once for each living, nonimmediate object in this
|
|
* Ruby process. If <i>module</i> is specified, calls the block
|
|
* for only those classes or modules that match (or are a subclass of)
|
|
* <i>module</i>. Returns the number of objects found. Immediate
|
|
* objects (<code>Fixnum</code>s, <code>Symbol</code>s
|
|
* <code>true</code>, <code>false</code>, and <code>nil</code>) are
|
|
* never returned. In the example below, <code>each_object</code>
|
|
* returns both the numbers we defined and several constants defined in
|
|
* the <code>Math</code> module.
|
|
*
|
|
* a = 102.7
|
|
* b = 95 # Won't be returned
|
|
* c = 12345678987654321
|
|
* count = ObjectSpace.each_object(Numeric) {|x| p x }
|
|
* puts "Total count: #{count}"
|
|
*
|
|
* <em>produces:</em>
|
|
*
|
|
* 12345678987654321
|
|
* 102.7
|
|
* 2.71828182845905
|
|
* 3.14159265358979
|
|
* 2.22044604925031e-16
|
|
* 1.7976931348623157e+308
|
|
* 2.2250738585072e-308
|
|
* Total count: 7
|
|
*
|
|
*/
|
|
|
|
static VALUE
|
|
os_each_obj(int argc, VALUE *argv)
|
|
{
|
|
VALUE of;
|
|
|
|
rb_secure(4);
|
|
if (rb_scan_args(argc, argv, "01", &of) == 0) {
|
|
return os_live_obj();
|
|
}
|
|
else {
|
|
return os_obj_of(of);
|
|
}
|
|
}
|
|
|
|
static VALUE finalizers;
|
|
|
|
/* deprecated
|
|
*/
|
|
|
|
static VALUE
|
|
add_final(VALUE os, VALUE block)
|
|
{
|
|
rb_warn("ObjectSpace::add_finalizer is deprecated; use define_finalizer");
|
|
if (!rb_respond_to(block, rb_intern("call"))) {
|
|
rb_raise(rb_eArgError, "wrong type argument %s (should be callable)",
|
|
rb_obj_classname(block));
|
|
}
|
|
rb_ary_push(finalizers, block);
|
|
return block;
|
|
}
|
|
|
|
/*
|
|
* deprecated
|
|
*/
|
|
static VALUE
|
|
rm_final(VALUE os, VALUE block)
|
|
{
|
|
rb_warn("ObjectSpace::remove_finalizer is deprecated; use undefine_finalizer");
|
|
rb_ary_delete(finalizers, block);
|
|
return block;
|
|
}
|
|
|
|
/*
|
|
* deprecated
|
|
*/
|
|
static VALUE
|
|
finals(void)
|
|
{
|
|
rb_warn("ObjectSpace::finalizers is deprecated");
|
|
return finalizers;
|
|
}
|
|
|
|
/*
|
|
* deprecated
|
|
*/
|
|
|
|
static VALUE
|
|
call_final(VALUE os, VALUE obj)
|
|
{
|
|
rb_warn("ObjectSpace::call_finalizer is deprecated; use define_finalizer");
|
|
need_call_final = 1;
|
|
FL_SET(obj, FL_FINALIZE);
|
|
return obj;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* ObjectSpace.undefine_finalizer(obj)
|
|
*
|
|
* Removes all finalizers for <i>obj</i>.
|
|
*
|
|
*/
|
|
|
|
static VALUE
|
|
undefine_final(VALUE os, VALUE obj)
|
|
{
|
|
if (finalizer_table) {
|
|
st_delete(finalizer_table, (st_data_t*)&obj, 0);
|
|
}
|
|
return obj;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* ObjectSpace.define_finalizer(obj, aProc=proc())
|
|
*
|
|
* Adds <i>aProc</i> as a finalizer, to be called after <i>obj</i>
|
|
* was destroyed.
|
|
*
|
|
*/
|
|
|
|
static VALUE
|
|
define_final(int argc, VALUE *argv, VALUE os)
|
|
{
|
|
VALUE obj, block, table;
|
|
|
|
rb_scan_args(argc, argv, "11", &obj, &block);
|
|
if (argc == 1) {
|
|
block = rb_block_proc();
|
|
}
|
|
else if (!rb_respond_to(block, rb_intern("call"))) {
|
|
rb_raise(rb_eArgError, "wrong type argument %s (should be callable)",
|
|
rb_obj_classname(block));
|
|
}
|
|
need_call_final = 1;
|
|
FL_SET(obj, FL_FINALIZE);
|
|
|
|
block = rb_ary_new3(2, INT2FIX(rb_safe_level()), block);
|
|
|
|
if (!finalizer_table) {
|
|
finalizer_table = st_init_numtable();
|
|
}
|
|
if (st_lookup(finalizer_table, obj, &table)) {
|
|
rb_ary_push(table, block);
|
|
}
|
|
else {
|
|
st_add_direct(finalizer_table, obj, rb_ary_new3(1, block));
|
|
}
|
|
return block;
|
|
}
|
|
|
|
void
|
|
rb_gc_copy_finalizer(VALUE dest, VALUE obj)
|
|
{
|
|
VALUE table;
|
|
|
|
if (!finalizer_table) return;
|
|
if (!FL_TEST(obj, FL_FINALIZE)) return;
|
|
if (st_lookup(finalizer_table, obj, &table)) {
|
|
st_insert(finalizer_table, dest, table);
|
|
}
|
|
FL_SET(dest, FL_FINALIZE);
|
|
}
|
|
|
|
static VALUE
|
|
run_single_final(VALUE *args)
|
|
{
|
|
rb_eval_cmd(args[0], args[1], (int)args[2]);
|
|
return Qnil;
|
|
}
|
|
|
|
static void
|
|
run_final(VALUE obj)
|
|
{
|
|
long i;
|
|
int status, critical_save = rb_thread_critical;
|
|
VALUE args[3], table, objid;
|
|
|
|
objid = rb_obj_id(obj); /* make obj into id */
|
|
rb_thread_critical = Qtrue;
|
|
args[1] = 0;
|
|
args[2] = (VALUE)rb_safe_level();
|
|
for (i=0; i<RARRAY_LEN(finalizers); i++) {
|
|
args[0] = RARRAY_PTR(finalizers)[i];
|
|
if (!args[1]) args[1] = rb_ary_new3(1, objid);
|
|
rb_protect((VALUE(*)(VALUE))run_single_final, (VALUE)args, &status);
|
|
}
|
|
if (finalizer_table && st_delete(finalizer_table, (st_data_t*)&obj, &table)) {
|
|
for (i=0; i<RARRAY_LEN(table); i++) {
|
|
VALUE final = RARRAY_PTR(table)[i];
|
|
args[0] = RARRAY_PTR(final)[1];
|
|
if (!args[1]) args[1] = rb_ary_new3(1, objid);
|
|
args[2] = FIX2INT(RARRAY_PTR(final)[0]);
|
|
rb_protect((VALUE(*)(VALUE))run_single_final, (VALUE)args, &status);
|
|
}
|
|
}
|
|
rb_thread_critical = critical_save;
|
|
}
|
|
|
|
void
|
|
rb_gc_finalize_deferred(void)
|
|
{
|
|
RVALUE *p = deferred_final_list;
|
|
|
|
during_gc++;
|
|
deferred_final_list = 0;
|
|
if (p) {
|
|
finalize_list(p);
|
|
}
|
|
free_unused_heaps();
|
|
during_gc = 0;
|
|
}
|
|
|
|
void
|
|
rb_gc_call_finalizer_at_exit(void)
|
|
{
|
|
RVALUE *p, *pend;
|
|
int i;
|
|
|
|
/* finalizers are part of garbage collection */
|
|
during_gc++;
|
|
/* run finalizers */
|
|
if (need_call_final) {
|
|
p = deferred_final_list;
|
|
deferred_final_list = 0;
|
|
finalize_list(p);
|
|
for (i = 0; i < heaps_used; i++) {
|
|
p = heaps[i].slot; pend = p + heaps[i].limit;
|
|
while (p < pend) {
|
|
if (FL_TEST(p, FL_FINALIZE)) {
|
|
FL_UNSET(p, FL_FINALIZE);
|
|
p->as.basic.klass = 0;
|
|
run_final((VALUE)p);
|
|
}
|
|
p++;
|
|
}
|
|
}
|
|
}
|
|
/* run data object's finalizers */
|
|
for (i = 0; i < heaps_used; i++) {
|
|
p = heaps[i].slot; pend = p + heaps[i].limit;
|
|
while (p < pend) {
|
|
if (BUILTIN_TYPE(p) == T_DATA &&
|
|
DATA_PTR(p) && RANY(p)->as.data.dfree &&
|
|
RANY(p)->as.basic.klass != rb_cThread) {
|
|
p->as.free.flags = 0;
|
|
if ((long)RANY(p)->as.data.dfree == -1) {
|
|
RUBY_CRITICAL(free(DATA_PTR(p)));
|
|
}
|
|
else if (RANY(p)->as.data.dfree) {
|
|
(*RANY(p)->as.data.dfree)(DATA_PTR(p));
|
|
}
|
|
}
|
|
else if (BUILTIN_TYPE(p) == T_FILE) {
|
|
if (rb_io_fptr_finalize(RANY(p)->as.file.fptr)) {
|
|
p->as.free.flags = 0;
|
|
}
|
|
}
|
|
p++;
|
|
}
|
|
}
|
|
during_gc = 0;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* ObjectSpace._id2ref(object_id) -> an_object
|
|
*
|
|
* Converts an object id to a reference to the object. May not be
|
|
* called on an object id passed as a parameter to a finalizer.
|
|
*
|
|
* s = "I am a string" #=> "I am a string"
|
|
* r = ObjectSpace._id2ref(s.object_id) #=> "I am a string"
|
|
* r == s #=> true
|
|
*
|
|
*/
|
|
|
|
static VALUE
|
|
id2ref(VALUE obj, VALUE objid)
|
|
{
|
|
#if SIZEOF_LONG == SIZEOF_VOIDP
|
|
#define NUM2PTR(x) NUM2ULONG(x)
|
|
#elif SIZEOF_LONG_LONG == SIZEOF_VOIDP
|
|
#define NUM2PTR(x) NUM2ULL(x)
|
|
#endif
|
|
VALUE ptr;
|
|
void *p0;
|
|
|
|
rb_secure(4);
|
|
ptr = NUM2PTR(objid);
|
|
p0 = (void *)ptr;
|
|
|
|
if (ptr == Qtrue) return Qtrue;
|
|
if (ptr == Qfalse) return Qfalse;
|
|
if (ptr == Qnil) return Qnil;
|
|
if (FIXNUM_P(ptr)) return (VALUE)ptr;
|
|
ptr = objid ^ FIXNUM_FLAG; /* unset FIXNUM_FLAG */
|
|
|
|
if ((ptr % sizeof(RVALUE)) == (4 << 2)) {
|
|
ID symid = ptr / sizeof(RVALUE);
|
|
if (rb_id2name(symid) == 0)
|
|
rb_raise(rb_eRangeError, "%p is not symbol id value", p0);
|
|
return ID2SYM(symid);
|
|
}
|
|
|
|
if (!is_pointer_to_heap((void *)ptr)|| BUILTIN_TYPE(ptr) >= T_BLOCK) {
|
|
rb_raise(rb_eRangeError, "%p is not id value", p0);
|
|
}
|
|
if (BUILTIN_TYPE(ptr) == 0 || RBASIC(ptr)->klass == 0) {
|
|
rb_raise(rb_eRangeError, "%p is recycled object", p0);
|
|
}
|
|
return (VALUE)ptr;
|
|
}
|
|
|
|
/*
|
|
* Document-method: __id__
|
|
* Document-method: object_id
|
|
*
|
|
* call-seq:
|
|
* obj.__id__ => fixnum
|
|
* obj.object_id => fixnum
|
|
*
|
|
* Returns an integer identifier for <i>obj</i>. The same number will
|
|
* be returned on all calls to <code>id</code> for a given object, and
|
|
* no two active objects will share an id.
|
|
* <code>Object#object_id</code> is a different concept from the
|
|
* <code>:name</code> notation, which returns the symbol id of
|
|
* <code>name</code>. Replaces the deprecated <code>Object#id</code>.
|
|
*/
|
|
|
|
/*
|
|
* call-seq:
|
|
* obj.hash => fixnum
|
|
*
|
|
* Generates a <code>Fixnum</code> hash value for this object. This
|
|
* function must have the property that <code>a.eql?(b)</code> implies
|
|
* <code>a.hash == b.hash</code>. The hash value is used by class
|
|
* <code>Hash</code>. Any hash value that exceeds the capacity of a
|
|
* <code>Fixnum</code> will be truncated before being used.
|
|
*/
|
|
|
|
VALUE
|
|
rb_obj_id(VALUE obj)
|
|
{
|
|
/*
|
|
* 32-bit VALUE space
|
|
* MSB ------------------------ LSB
|
|
* false 00000000000000000000000000000000
|
|
* true 00000000000000000000000000000010
|
|
* nil 00000000000000000000000000000100
|
|
* undef 00000000000000000000000000000110
|
|
* symbol ssssssssssssssssssssssss00001110
|
|
* object oooooooooooooooooooooooooooooo00 = 0 (mod sizeof(RVALUE)
|
|
* fixnum fffffffffffffffffffffffffffffff1
|
|
*
|
|
* object_id space
|
|
* LSB
|
|
* false 00000000000000000000000000000000
|
|
* true 00000000000000000000000000000010
|
|
* nil 00000000000000000000000000000100
|
|
* undef 00000000000000000000000000000110
|
|
* symbol 000SSSSSSSSSSSSSSSSSSSSSSSSSSS0 S...S % A = 4 (S...S =
|
|
* object oooooooooooooooooooooooooooooo0 o...o % A = 0
|
|
* fixnum fffffffffffffffffffffffffffffff1 bignum if required
|
|
*
|
|
* where A = sizeof(RVALUE)/4
|
|
*
|
|
* sizeof(RVALUE) is
|
|
* 20 if 32-bit, double is 4-byte aligned
|
|
* 24 if 32-bit, double is 8-byte aligned
|
|
* 40 if 64-bit
|
|
*/
|
|
if (TYPE(obj) == T_SYMBOL) {
|
|
return (SYM2ID(obj) * sizeof(RVALUE) + (4 << 2)) | FIXNUM_FLAG;
|
|
}
|
|
if (SPECIAL_CONST_P(obj)) {
|
|
return LONG2NUM((long)obj);
|
|
}
|
|
return (VALUE)((long)obj|FIXNUM_FLAG);
|
|
}
|
|
|
|
/*
|
|
* The <code>GC</code> module provides an interface to Ruby's mark and
|
|
* sweep garbage collection mechanism. Some of the underlying methods
|
|
* are also available via the <code>ObjectSpace</code> module.
|
|
*/
|
|
|
|
void
|
|
Init_GC(void)
|
|
{
|
|
VALUE rb_mObSpace;
|
|
|
|
rb_mGC = rb_define_module("GC");
|
|
rb_define_singleton_method(rb_mGC, "start", rb_gc_start, 0);
|
|
rb_define_singleton_method(rb_mGC, "enable", rb_gc_enable, 0);
|
|
rb_define_singleton_method(rb_mGC, "disable", rb_gc_disable, 0);
|
|
rb_define_singleton_method(rb_mGC, "stress", gc_stress_get, 0);
|
|
rb_define_singleton_method(rb_mGC, "stress=", gc_stress_set, 1);
|
|
rb_define_method(rb_mGC, "garbage_collect", rb_gc_start, 0);
|
|
|
|
rb_mObSpace = rb_define_module("ObjectSpace");
|
|
rb_define_module_function(rb_mObSpace, "each_object", os_each_obj, -1);
|
|
rb_define_module_function(rb_mObSpace, "garbage_collect", rb_gc_start, 0);
|
|
rb_define_module_function(rb_mObSpace, "add_finalizer", add_final, 1);
|
|
rb_define_module_function(rb_mObSpace, "remove_finalizer", rm_final, 1);
|
|
rb_define_module_function(rb_mObSpace, "finalizers", finals, 0);
|
|
rb_define_module_function(rb_mObSpace, "call_finalizer", call_final, 1);
|
|
|
|
rb_define_module_function(rb_mObSpace, "define_finalizer", define_final, -1);
|
|
rb_define_module_function(rb_mObSpace, "undefine_finalizer", undefine_final, 1);
|
|
|
|
rb_define_module_function(rb_mObSpace, "_id2ref", id2ref, 1);
|
|
|
|
rb_gc_register_address(&rb_mObSpace);
|
|
rb_global_variable(&finalizers);
|
|
rb_gc_unregister_address(&rb_mObSpace);
|
|
finalizers = rb_ary_new();
|
|
|
|
source_filenames = st_init_strtable();
|
|
|
|
rb_global_variable(&nomem_error);
|
|
nomem_error = rb_exc_new2(rb_eNoMemError, "failed to allocate memory");
|
|
|
|
rb_define_method(rb_mKernel, "hash", rb_obj_id, 0);
|
|
rb_define_method(rb_mKernel, "__id__", rb_obj_id, 0);
|
|
rb_define_method(rb_mKernel, "object_id", rb_obj_id, 0);
|
|
}
|