From a3e1b1ce7ed7e7ffac23015fc2fde56511b30681 Mon Sep 17 00:00:00 2001 From: ko1 Date: Sun, 31 Dec 2006 15:02:22 +0000 Subject: * Merge YARV git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@11439 b2dd03c8-39d4-4d8f-98ff-823fe69b080e --- eval_method.h | 612 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 612 insertions(+) create mode 100644 eval_method.h (limited to 'eval_method.h') diff --git a/eval_method.h b/eval_method.h new file mode 100644 index 0000000000..59e7cef8dc --- /dev/null +++ b/eval_method.h @@ -0,0 +1,612 @@ +/* + * This file is included by eval.c + */ + +#define CACHE_SIZE 0x800 +#define CACHE_MASK 0x7ff +#define EXPR1(c,m) ((((c)>>3)^(m))&CACHE_MASK) + +struct cache_entry { /* method hash table. */ + ID mid; /* method's id */ + ID mid0; /* method's original id */ + VALUE klass; /* receiver's class */ + NODE *method; +}; + +static struct cache_entry cache[CACHE_SIZE]; +static int ruby_running = 0; + +void +rb_clear_cache(void) +{ + struct cache_entry *ent, *end; + + rb_vm_change_state(); + + if (!ruby_running) + return; + ent = cache; + end = ent + CACHE_SIZE; + while (ent < end) { + ent->mid = 0; + ent++; + } +} + +static void +rb_clear_cache_for_undef(VALUE klass, ID id) +{ + struct cache_entry *ent, *end; + + rb_vm_change_state(); + + if (!ruby_running) + return; + ent = cache; + end = ent + CACHE_SIZE; + while (ent < end) { + if (ent->method && ent->method->nd_clss == klass && ent->mid == id) { + ent->mid = 0; + } + ent++; + } +} + +static void +rb_clear_cache_by_id(ID id) +{ + struct cache_entry *ent, *end; + + rb_vm_change_state(); + + if (!ruby_running) + return; + ent = cache; + end = ent + CACHE_SIZE; + while (ent < end) { + if (ent->mid == id) { + ent->mid = 0; + } + ent++; + } +} + +void +rb_clear_cache_by_class(VALUE klass) +{ + struct cache_entry *ent, *end; + + rb_vm_change_state(); + + if (!ruby_running) + return; + ent = cache; + end = ent + CACHE_SIZE; + while (ent < end) { + if ((ent->klass == klass) || + (ent->method && ent->method->nd_clss == klass)) { + ent->mid = 0; + } + ent++; + } +} + +void +rb_add_method(VALUE klass, ID mid, NODE * node, int noex) +{ + NODE *body; + + if (NIL_P(klass)) { + klass = rb_cObject; + } + if (rb_safe_level() >= 4 && (klass == rb_cObject || !OBJ_TAINTED(klass))) { + rb_raise(rb_eSecurityError, "Insecure: can't define method"); + } + if (!FL_TEST(klass, FL_SINGLETON) && + node && nd_type(node) != NODE_ZSUPER && + (mid == rb_intern("initialize") || mid == rb_intern("initialize_copy"))) { + noex = NOEX_PRIVATE | noex; + } + else if (FL_TEST(klass, FL_SINGLETON) && node + && nd_type(node) == NODE_CFUNC && mid == rb_intern("allocate")) { + rb_warn + ("defining %s.allocate is deprecated; use rb_define_alloc_func()", + rb_class2name(rb_iv_get(klass, "__attached__"))); + mid = ID_ALLOCATOR; + } + if (OBJ_FROZEN(klass)) { + rb_error_frozen("class/module"); + } + rb_clear_cache_by_id(mid); + + /* + * NODE_METHOD (NEW_METHOD(body, klass, vis)): + * nd_body : method body // (2) // mark + * nd_clss : klass // (1) // mark + * nd_noex : visibility // (3) + * + * NODE_FBODY (NEW_FBODY(method, alias)): + * nd_body : method (NODE_METHOD) // (2) // mark + * nd_oid : original id // (1) + * nd_cnt : alias count // (3) + */ + if (node) { + body = NEW_FBODY(NEW_METHOD(node, klass, noex), 0); + } + else { + body = 0; + } + + { + /* check re-definition */ + NODE *old_node; + + if (st_lookup(RCLASS(klass)->m_tbl, mid, (st_data_t *)&old_node)) { + if (old_node) { + if (nd_type(old_node->nd_body->nd_body) == NODE_CFUNC) { + yarv_check_redefinition_opt_method(old_node); + } + } + if (klass == rb_cObject && node->nd_mid == init) { + rb_warn("redefining Object#initialize may cause infinite loop"); + } + if (RTEST(ruby_verbose) && old_node->nd_cnt == 0 && old_node->nd_body) { + rb_warning("method redefined; discarding old %s", rb_id2name(mid)); + } + } + + if (mid == object_id || mid == __send || mid == __send_bang) { + if (node && nd_type(node) == YARV_METHOD_NODE) { + rb_warn("redefining `%s' may cause serious problem", + rb_id2name(mid)); + } + } + } + + st_insert(RCLASS(klass)->m_tbl, mid, (st_data_t) body); + + if (node && mid != ID_ALLOCATOR && ruby_running) { + if (FL_TEST(klass, FL_SINGLETON)) { + rb_funcall(rb_iv_get(klass, "__attached__"), singleton_added, 1, + ID2SYM(mid)); + } + else { + rb_funcall(klass, added, 1, ID2SYM(mid)); + } + } +} + +void +rb_define_alloc_func(VALUE klass, VALUE (*func) _((VALUE))) +{ + Check_Type(klass, T_CLASS); + rb_add_method(CLASS_OF(klass), ID_ALLOCATOR, NEW_CFUNC(func, 0), + NOEX_PRIVATE); +} + +void +rb_undef_alloc_func(VALUE klass) +{ + Check_Type(klass, T_CLASS); + rb_add_method(CLASS_OF(klass), ID_ALLOCATOR, 0, NOEX_UNDEF); +} + +static NODE * +search_method(VALUE klass, ID id, VALUE *klassp) +{ + NODE *body; + + if (!klass) { + return 0; + } + + while (!st_lookup(RCLASS(klass)->m_tbl, id, (st_data_t *) & body)) { + klass = RCLASS(klass)->super; + if (!klass) + return 0; + } + + if (klassp) { + *klassp = klass; + } + + return body; +} + +/* + * search method body (NODE_METHOD) + * with : klass and id + * without : method cache + * + * if you need method node with method cache, use + * rb_method_node() + */ +NODE * +rb_get_method_body(VALUE klass, ID id, ID *idp) +{ + NODE *volatile fbody, *body; + NODE *method; + + if ((fbody = search_method(klass, id, 0)) == 0 || !fbody->nd_body) { + /* store empty info in cache */ + struct cache_entry *ent; + ent = cache + EXPR1(klass, id); + ent->klass = klass; + ent->mid = ent->mid0 = id; + ent->method = 0; + return 0; + } + + method = fbody->nd_body; + + if (ruby_running) { + /* store in cache */ + struct cache_entry *ent; + ent = cache + EXPR1(klass, id); + ent->klass = klass; + ent->mid = id; + ent->mid0 = fbody->nd_oid; + ent->method = body = method; + } + else { + body = method; + } + + if (idp) { + *idp = fbody->nd_oid; + } + + return body; +} + +NODE * +rb_method_node(VALUE klass, ID id) +{ + struct cache_entry *ent; + + ent = cache + EXPR1(klass, id); + if (ent->mid == id && ent->klass == klass && ent->method) { + return ent->method; + } + + return rb_get_method_body(klass, id, 0); +} + +static void +remove_method(VALUE klass, ID mid) +{ + NODE *body; + + if (klass == rb_cObject) { + rb_secure(4); + } + if (rb_safe_level() >= 4 && !OBJ_TAINTED(klass)) { + rb_raise(rb_eSecurityError, "Insecure: can't remove method"); + } + if (OBJ_FROZEN(klass)) + rb_error_frozen("class/module"); + if (mid == object_id || mid == __send || mid == __send_bang || mid == init) { + rb_warn("removing `%s' may cause serious problem", rb_id2name(mid)); + } + if (!st_delete(RCLASS(klass)->m_tbl, &mid, (st_data_t *) & body) || + !body->nd_body) { + rb_name_error(mid, "method `%s' not defined in %s", + rb_id2name(mid), rb_class2name(klass)); + } + rb_clear_cache_for_undef(klass, mid); + if (FL_TEST(klass, FL_SINGLETON)) { + rb_funcall(rb_iv_get(klass, "__attached__"), singleton_removed, 1, + ID2SYM(mid)); + } + else { + rb_funcall(klass, removed, 1, ID2SYM(mid)); + } +} + +void +rb_remove_method(VALUE klass, const char *name) +{ + remove_method(klass, rb_intern(name)); +} + +/* + * call-seq: + * remove_method(symbol) => self + * + * Removes the method identified by _symbol_ from the current + * class. For an example, see Module.undef_method. + */ + +static VALUE +rb_mod_remove_method(int argc, VALUE *argv, VALUE mod) +{ + int i; + + for (i = 0; i < argc; i++) { + remove_method(mod, rb_to_id(argv[i])); + } + return mod; +} + +#undef rb_disable_super +#undef rb_enable_super + +void +rb_disable_super(VALUE klass, const char *name) +{ + /* obsolete - no use */ +} + +void +rb_enable_super(VALUE klass, const char *name) +{ + rb_warning("rb_enable_super() is obsolete"); +} + +static void +rb_export_method(VALUE klass, ID name, ID noex) +{ + NODE *fbody; + VALUE origin; + + if (klass == rb_cObject) { + rb_secure(4); + } + fbody = search_method(klass, name, &origin); + if (!fbody && TYPE(klass) == T_MODULE) { + fbody = search_method(rb_cObject, name, &origin); + } + if (!fbody || !fbody->nd_body) { + print_undef(klass, name); + } + if (fbody->nd_body->nd_noex != noex) { + if (klass == origin) { + fbody->nd_body->nd_noex = noex; + } + else { + rb_add_method(klass, name, NEW_ZSUPER(), noex); + } + } +} + +int +rb_method_boundp(VALUE klass, ID id, int ex) +{ + NODE *method; + + if ((method = rb_method_node(klass, id)) != 0) { + if (ex && (method->nd_noex & NOEX_PRIVATE)) { + return Qfalse; + } + return Qtrue; + } + return Qfalse; +} + +void +rb_attr(VALUE klass, ID id, int read, int write, int ex) +{ + const char *name; + char *buf; + ID attriv; + int noex; + size_t len; + + if (!ex) { + noex = NOEX_PUBLIC; + } + else { + if (SCOPE_TEST(NOEX_PRIVATE)) { + noex = NOEX_PRIVATE; + rb_warning((SCOPE_CHECK(NOEX_MODFUNC)) ? + "attribute accessor as module_function" : + "private attribute?"); + } + else if (SCOPE_TEST(NOEX_PROTECTED)) { + noex = NOEX_PROTECTED; + } + else { + noex = NOEX_PUBLIC; + } + } + + if (!rb_is_local_id(id) && !rb_is_const_id(id)) { + rb_name_error(id, "invalid attribute name `%s'", rb_id2name(id)); + } + name = rb_id2name(id); + if (!name) { + rb_raise(rb_eArgError, "argument needs to be symbol or string"); + } + len = strlen(name) + 2; + buf = ALLOCA_N(char, len); + snprintf(buf, len, "@%s", name); + attriv = rb_intern(buf); + if (read) { + rb_add_method(klass, id, NEW_IVAR(attriv), noex); + } + if (write) { + rb_add_method(klass, rb_id_attrset(id), NEW_ATTRSET(attriv), noex); + } +} + +void +rb_undef(VALUE klass, ID id) +{ + VALUE origin; + NODE *body; + + if (ruby_cbase() == rb_cObject && klass == rb_cObject) { + rb_secure(4); + } + if (rb_safe_level() >= 4 && !OBJ_TAINTED(klass)) { + rb_raise(rb_eSecurityError, "Insecure: can't undef `%s'", + rb_id2name(id)); + } + rb_frozen_class_p(klass); + if (id == object_id || id == __send || id == __send_bang || id == init) { + rb_warn("undefining `%s' may cause serious problem", rb_id2name(id)); + } + body = search_method(klass, id, &origin); + if (!body || !body->nd_body) { + char *s0 = " class"; + VALUE c = klass; + + if (FL_TEST(c, FL_SINGLETON)) { + VALUE obj = rb_iv_get(klass, "__attached__"); + + switch (TYPE(obj)) { + case T_MODULE: + case T_CLASS: + c = obj; + s0 = ""; + } + } + else if (TYPE(c) == T_MODULE) { + s0 = " module"; + } + rb_name_error(id, "undefined method `%s' for%s `%s'", + rb_id2name(id), s0, rb_class2name(c)); + } + + rb_add_method(klass, id, 0, NOEX_PUBLIC); + + if (FL_TEST(klass, FL_SINGLETON)) { + rb_funcall(rb_iv_get(klass, "__attached__"), + singleton_undefined, 1, ID2SYM(id)); + } + else { + rb_funcall(klass, undefined, 1, ID2SYM(id)); + } +} + +/* + * call-seq: + * undef_method(symbol) => self + * + * Prevents the current class from responding to calls to the named + * method. Contrast this with remove_method, which deletes + * the method from the particular class; Ruby will still search + * superclasses and mixed-in modules for a possible receiver. + * + * class Parent + * def hello + * puts "In parent" + * end + * end + * class Child < Parent + * def hello + * puts "In child" + * end + * end + * + * + * c = Child.new + * c.hello + * + * + * class Child + * remove_method :hello # remove from child, still in parent + * end + * c.hello + * + * + * class Child + * undef_method :hello # prevent any calls to 'hello' + * end + * c.hello + * + * produces: + * + * In child + * In parent + * prog.rb:23: undefined method `hello' for # (NoMethodError) + */ + +static VALUE +rb_mod_undef_method(int argc, VALUE *argv, VALUE mod) +{ + int i; + for (i = 0; i < argc; i++) { + rb_undef(mod, rb_to_id(argv[i])); + } + return mod; +} + +void +rb_alias(VALUE klass, ID name, ID def) +{ + NODE *orig_fbody, *node; + VALUE singleton = 0; + + rb_frozen_class_p(klass); + if (name == def) + return; + if (klass == rb_cObject) { + rb_secure(4); + } + orig_fbody = search_method(klass, def, 0); + if (!orig_fbody || !orig_fbody->nd_body) { + if (TYPE(klass) == T_MODULE) { + orig_fbody = search_method(rb_cObject, def, 0); + } + } + if (!orig_fbody || !orig_fbody->nd_body) { + print_undef(klass, def); + } + if (FL_TEST(klass, FL_SINGLETON)) { + singleton = rb_iv_get(klass, "__attached__"); + } + + orig_fbody->nd_cnt++; + + if (RTEST(ruby_verbose) && + st_lookup(RCLASS(klass)->m_tbl, name, (st_data_t *) & node)) { + if (node->nd_cnt == 0 && node->nd_body) { + rb_warning("discarding old %s", rb_id2name(name)); + } + } + + st_insert(RCLASS(klass)->m_tbl, name, + (st_data_t) NEW_FBODY( + NEW_METHOD(orig_fbody->nd_body->nd_body, + orig_fbody->nd_body->nd_clss, + orig_fbody->nd_body->nd_noex), def)); + + rb_clear_cache_by_id(name); + + if (singleton) { + rb_funcall(singleton, singleton_added, 1, ID2SYM(name)); + } + else { + rb_funcall(klass, added, 1, ID2SYM(name)); + } +} + +/* + * call-seq: + * alias_method(new_name, old_name) => self + * + * Makes new_name a new copy of the method old_name. This can + * be used to retain access to methods that are overridden. + * + * module Mod + * alias_method :orig_exit, :exit + * def exit(code=0) + * puts "Exiting with code #{code}" + * orig_exit(code) + * end + * end + * include Mod + * exit(99) + * + * produces: + * + * Exiting with code 99 + */ + +static VALUE +rb_mod_alias_method(VALUE mod, VALUE newname, VALUE oldname) +{ + rb_alias(mod, rb_to_id(newname), rb_to_id(oldname)); + return mod; +} -- cgit v1.2.3