static force_inline VALUE ruby_dispatch(VALUE top, VALUE self, SEL sel, rb_vm_method_node_t *node, unsigned char opt, int argc, const VALUE *argv) { const rb_vm_arity_t &arity = node->arity; if ((argc < arity.min) || ((arity.max != -1) && (argc > arity.max))) { short limit = (argc < arity.min) ? arity.min : arity.max; rb_raise(rb_eArgError, "wrong number of arguments (%d for %d)", argc, limit); } if ((node->flags & VM_METHOD_PRIVATE) && opt == 0) { // Calling a private method with no explicit receiver OR an attribute // assignment to non-self, triggering #method_missing. rb_vm_block_t *b = GET_VM()->current_block(); return method_missing(self, sel, b, argc, argv, METHOD_MISSING_PRIVATE); } if ((node->flags & VM_METHOD_PROTECTED) && top != 0 && node->klass != NULL && !rb_obj_is_kind_of(top, (VALUE)node->klass)) { // Calling a protected method inside a method where 'self' is not // an instance of the class where the method was originally defined, // triggering #method_missing. rb_vm_block_t *b = GET_VM()->current_block(); return method_missing(self, sel, b, argc, argv, METHOD_MISSING_PROTECTED); } if ((node->flags & VM_METHOD_EMPTY) && arity.max == arity.min) { // Calling an empty method, let's just return nil! return Qnil; } if ((node->flags & VM_METHOD_FBODY) && arity.max != arity.min) { // Calling a function defined with rb_objc_define_method with // a negative arity, which means a different calling convention. if (arity.real == 2) { return ((VALUE (*)(VALUE, SEL, int, const VALUE *))node->ruby_imp) (self, sel, argc, argv); } else if (arity.real == 1) { return ((VALUE (*)(VALUE, SEL, ...))node->ruby_imp) (self, sel, rb_ary_new4(argc, argv)); } else if (arity.real == 3) { return ((VALUE (*)(VALUE, SEL, VALUE, int, const VALUE *))node->ruby_imp) (self, sel, top, argc, argv); } else { printf("invalid negative arity for C function %d\n", arity.real); abort(); } } return __rb_vm_rcall(self, sel, node->ruby_imp, arity, argc, argv); }
static inline VALUE vm_call_super(rb_thread_t * const th, const int argc, const VALUE * const argv) { VALUE recv = th->cfp->self; VALUE klass; ID id; NODE *body; rb_control_frame_t *cfp = th->cfp; if (!cfp->iseq) { klass = cfp->method_class; klass = RCLASS_SUPER(klass); if (klass == 0) { klass = vm_search_normal_superclass(cfp->method_class, recv); } id = cfp->method_id; } else { rb_bug("vm_call_super: should not be reached"); } body = rb_method_node(klass, id); /* this returns NODE_METHOD */ if (!body) { return method_missing(recv, id, argc, argv, 0); } return vm_call0(th, klass, recv, id, (ID)body->nd_file, argc, argv, body->nd_body, CALL_SUPER); }
Symbol* InlineCacheEntry::method_missing_prim(STATE) { switch(method_missing()) { case eNone: return state->symbol("none"); case ePrivate: return G(sym_private); case eProtected: return G(sym_protected); case eSuper: return state->symbol("super"); case eVCall: return state->symbol("vcall"); case eNormal: return state->symbol("normal"); } return nil<Symbol>(); }
VALUE rb_vm_dispatch(void *_vm, struct mcache *cache, VALUE top, VALUE self, Class klass, SEL sel, rb_vm_block_t *block, unsigned char opt, int argc, const VALUE *argv) { RoxorVM *vm = (RoxorVM *)_vm; #if ROXOR_VM_DEBUG bool cached = true; #endif bool cache_method = true; Class current_super_class = vm->get_current_super_class(); SEL current_super_sel = vm->get_current_super_sel(); if (opt & DISPATCH_SUPER) { // TODO goto recache; } if (cache->sel != sel || cache->klass != klass || cache->flag == 0) { recache: #if ROXOR_VM_DEBUG cached = false; #endif Method method; if (opt & DISPATCH_SUPER) { if (!sel_equal(klass, current_super_sel, sel)) { current_super_sel = sel; current_super_class = klass; } else { // Let's make sure the current_super_class is valid before // using it; we check this by verifying that it's a real // super class of the current class, as we may be calling // a super method of the same name but on a totally different // class hierarchy. Class k = klass; bool current_super_class_ok = false; while (k != NULL) { if (k == current_super_class) { current_super_class_ok = true; break; } k = class_getSuperclass(k); } if (!current_super_class_ok) { current_super_class = klass; } } method = rb_vm_super_lookup(current_super_class, sel, ¤t_super_class); } else { current_super_sel = 0; method = class_getInstanceMethod(klass, sel); } if (method != NULL) { recache2: IMP imp = method_getImplementation(method); if (UNAVAILABLE_IMP(imp)) { // Method was undefined. goto call_method_missing; } rb_vm_method_node_t *node = GET_CORE()->method_node_get(method); if (node != NULL) { // ruby call fill_rcache(cache, klass, sel, node); } else { // objc call fill_ocache(cache, self, klass, imp, sel, method, argc); } if (opt & DISPATCH_SUPER) { cache->flag |= MCACHE_SUPER; } } else { // Method is not found... #if !defined(MACRUBY_STATIC) // Force a method resolving, because the objc cache might be // wrong. if (rb_vm_resolve_method(klass, sel)) { goto recache; } #endif // Does the receiver implements -forwardInvocation:? if ((opt & DISPATCH_SUPER) == 0 && rb_objc_supports_forwarding(self, sel)) { //#if MAC_OS_X_VERSION_MAX_ALLOWED < 1070 // In earlier versions of the Objective-C runtime, there seems // to be a bug where class_getInstanceMethod isn't atomic, // and might return NULL while at the exact same time another // thread registers the related method. // As a work-around, we double-check if the method still does // not exist here. If he does, we can dispatch it properly. // note: OS X 10.7 also, this workaround is required. see #1476 method = class_getInstanceMethod(klass, sel); if (method != NULL) { goto recache2; } //#endif fill_ocache(cache, self, klass, (IMP)objc_msgSend, sel, NULL, argc); goto dispatch; } // Let's see if are not trying to call a Ruby method that accepts // a regular argument then an optional Hash argument, to be // compatible with the Ruby specification. const char *selname = (const char *)sel; size_t selname_len = strlen(selname); if (argc > 1) { const char *p = strchr(selname, ':'); if (p != NULL && p + 1 != '\0') { char *tmp = (char *)malloc(selname_len + 1); assert(tmp != NULL); strncpy(tmp, selname, p - selname + 1); tmp[p - selname + 1] = '\0'; sel = sel_registerName(tmp); VALUE h = rb_hash_new(); bool ok = true; p += 1; for (int i = 1; i < argc; i++) { const char *p2 = strchr(p, ':'); if (p2 == NULL) { ok = false; break; } strlcpy(tmp, p, selname_len); tmp[p2 - p] = '\0'; p = p2 + 1; rb_hash_aset(h, ID2SYM(rb_intern(tmp)), argv[i]); } free(tmp); tmp = NULL; if (ok) { argc = 2; ((VALUE *)argv)[1] = h; // bad, I know... Method m = class_getInstanceMethod(klass, sel); if (m != NULL) { method = m; cache_method = false; goto recache2; } } } } // Enable helpers for classes which are not RubyObject based. if ((RCLASS_VERSION(klass) & RCLASS_IS_OBJECT_SUBCLASS) != RCLASS_IS_OBJECT_SUBCLASS) { // Let's try to see if we are not given a helper selector. SEL new_sel = helper_sel(selname, selname_len); if (new_sel != NULL) { Method m = class_getInstanceMethod(klass, new_sel); if (m != NULL) { sel = new_sel; method = m; // We need to invert arguments because // #[]= and setObject:forKey: take arguments // in a reverse order if (new_sel == selSetObjectForKey && argc == 2) { VALUE swap = argv[0]; ((VALUE *)argv)[0] = argv[1]; ((VALUE *)argv)[1] = swap; cache_method = false; } goto recache2; } } } // Let's see if we are not trying to call a BridgeSupport function. if (selname[selname_len - 1] == ':') { selname_len--; } std::string name(selname, selname_len); bs_element_function_t *bs_func = GET_CORE()->find_bs_function(name); if (bs_func != NULL) { if ((unsigned)argc < bs_func->args_count || ((unsigned)argc > bs_func->args_count && bs_func->variadic == false)) { rb_raise(rb_eArgError, "wrong number of arguments (%d for %d)", argc, bs_func->args_count); } std::string types; vm_gen_bs_func_types(argc, argv, bs_func, types); cache->flag = MCACHE_FCALL; cache->sel = sel; cache->klass = klass; cache->as.fcall.bs_function = bs_func; cache->as.fcall.imp = (IMP)dlsym(RTLD_DEFAULT, bs_func->name); assert(cache->as.fcall.imp != NULL); cache->as.fcall.stub = (rb_vm_c_stub_t *)GET_CORE()->gen_stub( types, bs_func->variadic, bs_func->args_count, false); } else { // Still nothing, then let's call #method_missing. goto call_method_missing; } } } dispatch: if (cache->flag & MCACHE_RCALL) { if (!cache_method) { cache->flag = 0; } #if ROXOR_VM_DEBUG printf("ruby dispatch %c[<%s %p> %s] (imp %p block %p argc %d opt %d cache %p cached %s)\n", class_isMetaClass(klass) ? '+' : '-', class_getName(klass), (void *)self, sel_getName(sel), cache->as.rcall.node->ruby_imp, block, argc, opt, cache, cached ? "true" : "false"); #endif bool block_already_current = vm->is_block_current(block); Class current_klass = vm->get_current_class(); if (!block_already_current) { vm->add_current_block(block); } vm->set_current_class(NULL); Class old_current_super_class = vm->get_current_super_class(); vm->set_current_super_class(current_super_class); SEL old_current_super_sel = vm->get_current_super_sel(); vm->set_current_super_sel(current_super_sel); const bool should_pop_broken_with = sel != selInitialize && sel != selInitialize2; struct Finally { bool block_already_current; Class current_class; Class current_super_class; SEL current_super_sel; bool should_pop_broken_with; RoxorVM *vm; Finally(bool _block_already_current, Class _current_class, Class _current_super_class, SEL _current_super_sel, bool _should_pop_broken_with, RoxorVM *_vm) { block_already_current = _block_already_current; current_class = _current_class; current_super_class = _current_super_class; current_super_sel = _current_super_sel; should_pop_broken_with = _should_pop_broken_with; vm = _vm; } ~Finally() { if (!block_already_current) { vm->pop_current_block(); } vm->set_current_class(current_class); if (should_pop_broken_with) { vm->pop_broken_with(); } vm->set_current_super_class(current_super_class); vm->set_current_super_sel(current_super_sel); vm->pop_current_binding(); } } finalizer(block_already_current, current_klass, old_current_super_class, old_current_super_sel, should_pop_broken_with, vm); // DTrace probe: method__entry if (MACRUBY_METHOD_ENTRY_ENABLED()) { char *class_name = (char *)rb_class2name((VALUE)klass); char *method_name = (char *)sel_getName(sel); char file[PATH_MAX]; unsigned long line = 0; GET_CORE()->symbolize_backtrace_entry(1, file, sizeof file, &line, NULL, 0); MACRUBY_METHOD_ENTRY(class_name, method_name, file, line); } VALUE v = ruby_dispatch(top, self, sel, cache->as.rcall.node, opt, argc, argv); // DTrace probe: method__return if (MACRUBY_METHOD_RETURN_ENABLED()) { char *class_name = (char *)rb_class2name((VALUE)klass); char *method_name = (char *)sel_getName(sel); char file[PATH_MAX]; unsigned long line = 0; GET_CORE()->symbolize_backtrace_entry(1, file, sizeof file, &line, NULL, 0); MACRUBY_METHOD_RETURN(class_name, method_name, file, line); } return v; } else if (cache->flag & MCACHE_OCALL) { if (cache->as.ocall.argc != argc) { goto recache; } if (!cache_method) { cache->flag = 0; } if (block != NULL) { rb_warn("passing a block to an Objective-C method - " \ "will be ignored"); } else if (sel == selNew) { if (self == rb_cNSMutableArray) { self = rb_cRubyArray; } } else if (sel == selClass) { // Because +[NSObject class] returns self. if (RCLASS_META(klass)) { return RCLASS_MODULE(self) ? rb_cModule : rb_cClass; } // Because the CF classes should be hidden, for Ruby compat. if (self == Qnil) { return rb_cNilClass; } if (self == Qtrue) { return rb_cTrueClass; } if (self == Qfalse) { return rb_cFalseClass; } return rb_class_real((VALUE)klass, true); } #if ROXOR_VM_DEBUG printf("objc dispatch %c[<%s %p> %s] imp=%p cache=%p argc=%d (cached=%s)\n", class_isMetaClass(klass) ? '+' : '-', class_getName(klass), (void *)self, sel_getName(sel), cache->as.ocall.imp, cache, argc, cached ? "true" : "false"); #endif id ocrcv = RB2OC(self); if (cache->as.ocall.bs_method != NULL) { Class ocklass = object_getClass(ocrcv); for (int i = 0; i < (int)cache->as.ocall.bs_method->args_count; i++) { bs_element_arg_t *arg = &cache->as.ocall.bs_method->args[i]; if (arg->sel_of_type != NULL) { // BridgeSupport tells us that this argument contains a // selector of the given type, but we don't have any // information regarding the target. RubyCocoa and the // other ObjC bridges do not really require it since they // use the NSObject message forwarding mechanism, but // MacRuby registers all methods in the runtime. // // Therefore, we apply here a naive heuristic by assuming // that either the receiver or one of the arguments of this // call is the future target. const int arg_i = arg->index; assert(arg_i >= 0 && arg_i < argc); if (argv[arg_i] != Qnil) { ID arg_selid = rb_to_id(argv[arg_i]); SEL arg_sel = sel_registerName(rb_id2name(arg_selid)); if (reinstall_method_maybe(ocklass, arg_sel, arg->sel_of_type)) { goto sel_target_found; } for (int j = 0; j < argc; j++) { if (j != arg_i && !SPECIAL_CONST_P(argv[j])) { if (reinstall_method_maybe(*(Class *)argv[j], arg_sel, arg->sel_of_type)) { goto sel_target_found; } } } } sel_target_found: // There can only be one sel_of_type argument. break; } } } return __rb_vm_objc_dispatch(cache->as.ocall.stub, cache->as.ocall.imp, ocrcv, sel, argc, argv); } else if (cache->flag & MCACHE_FCALL) { #if ROXOR_VM_DEBUG printf("C dispatch %s() imp=%p argc=%d (cached=%s)\n", cache->as.fcall.bs_function->name, cache->as.fcall.imp, argc, cached ? "true" : "false"); #endif return (*cache->as.fcall.stub)(cache->as.fcall.imp, argc, argv); } printf("method dispatch is b0rked\n"); abort(); call_method_missing: // Before calling method_missing, let's check if we are not in the following // cases: // // def foo; end; foo(42) // def foo(x); end; foo // // If yes, we need to raise an ArgumentError exception instead. const char *selname = sel_getName(sel); const size_t selname_len = strlen(selname); SEL new_sel = 0; if (argc > 0 && selname[selname_len - 1] == ':') { char buf[100]; assert(sizeof buf > selname_len - 1); strlcpy(buf, selname, sizeof buf); buf[selname_len - 1] = '\0'; new_sel = sel_registerName(buf); } else if (argc == 0) { char buf[100]; snprintf(buf, sizeof buf, "%s:", selname); new_sel = sel_registerName(buf); } if (new_sel != 0) { Method m = class_getInstanceMethod(klass, new_sel); if (m != NULL) { IMP mimp = method_getImplementation(m); if (!UNAVAILABLE_IMP(mimp)) { unsigned expected_argc; rb_vm_method_node_t *node = GET_CORE()->method_node_get(m); if (node != NULL) { expected_argc = node->arity.min; } else { expected_argc = rb_method_getNumberOfArguments(m); expected_argc -= 2; // removing receiver and selector } rb_raise(rb_eArgError, "wrong number of arguments (%d for %d)", argc, expected_argc); } } } rb_vm_method_missing_reason_t status; if (opt & DISPATCH_VCALL) { status = METHOD_MISSING_VCALL; } else if (opt & DISPATCH_SUPER) { status = METHOD_MISSING_SUPER; } else { status = METHOD_MISSING_DEFAULT; } return method_missing((VALUE)self, sel, block, argc, argv, status); }
void * rb_vm_removed_imp(void *rcv, SEL sel) { method_missing((VALUE)rcv, sel, NULL, NULL, NULL, METHOD_MISSING_DEFAULT); return NULL; // never reached }
static inline VALUE vm_call0(rb_thread_t * th, VALUE klass, VALUE recv, VALUE id, ID oid, int argc, const VALUE *argv, const NODE *body, int nosuper) { VALUE val; rb_block_t *blockptr = 0; if (0) printf("id: %s, nd: %s, argc: %d, passed: %p\n", rb_id2name(id), ruby_node_name(nd_type(body)), argc, (void *)th->passed_block); if (th->passed_block) { blockptr = th->passed_block; th->passed_block = 0; } again: switch (nd_type(body)) { case RUBY_VM_METHOD_NODE:{ rb_control_frame_t *reg_cfp; VALUE iseqval = (VALUE)body->nd_body; int i; rb_vm_set_finish_env(th); reg_cfp = th->cfp; CHECK_STACK_OVERFLOW(reg_cfp, argc + 1); *reg_cfp->sp++ = recv; for (i = 0; i < argc; i++) { *reg_cfp->sp++ = argv[i]; } vm_setup_method(th, reg_cfp, argc, blockptr, 0, iseqval, recv); val = vm_exec(th); break; } case NODE_CFUNC: { EXEC_EVENT_HOOK(th, RUBY_EVENT_C_CALL, recv, id, klass); { rb_control_frame_t *reg_cfp = th->cfp; rb_control_frame_t *cfp = vm_push_frame(th, 0, VM_FRAME_MAGIC_CFUNC, recv, (VALUE)blockptr, 0, reg_cfp->sp, 0, 1); cfp->method_id = oid; cfp->method_class = klass; val = call_cfunc(body->nd_cfnc, recv, body->nd_argc, argc, argv); if (reg_cfp != th->cfp + 1) { SDR2(reg_cfp); SDR2(th->cfp-5); rb_bug("cfp consistency error - call0"); th->cfp = reg_cfp; } vm_pop_frame(th); } EXEC_EVENT_HOOK(th, RUBY_EVENT_C_RETURN, recv, id, klass); break; } case NODE_ATTRSET:{ if (argc != 1) { rb_raise(rb_eArgError, "wrong number of arguments (%d for 1)", argc); } val = rb_ivar_set(recv, body->nd_vid, argv[0]); break; } case NODE_IVAR: { if (argc != 0) { rb_raise(rb_eArgError, "wrong number of arguments (%d for 0)", argc); } val = rb_attr_get(recv, body->nd_vid); break; } case NODE_BMETHOD:{ val = vm_call_bmethod(th, oid, body->nd_cval, recv, klass, argc, (VALUE *)argv, blockptr); break; } case NODE_ZSUPER:{ klass = RCLASS_SUPER(klass); if (!klass || !(body = rb_method_node(klass, id))) { return method_missing(recv, id, argc, argv, 0); } RUBY_VM_CHECK_INTS(); nosuper = CALL_SUPER; body = body->nd_body; goto again; } default: rb_bug("unsupported: vm_call0(%s)", ruby_node_name(nd_type(body))); } RUBY_VM_CHECK_INTS(); return val; }
static inline VALUE rb_call0(VALUE klass, VALUE recv, ID mid, int argc, const VALUE *argv, int scope, VALUE self) { NODE *body, *method; int noex; ID id = mid; struct cache_entry *ent; rb_thread_t *th = GET_THREAD(); if (!klass) { rb_raise(rb_eNotImpError, "method `%s' called on terminated object (%p)", rb_id2name(mid), (void *)recv); } /* is it in the method cache? */ ent = cache + EXPR1(klass, mid); if (ent->mid == mid && ent->klass == klass) { if (!ent->method) return method_missing(recv, mid, argc, argv, scope == 2 ? NOEX_VCALL : 0); id = ent->mid0; noex = ent->method->nd_noex; klass = ent->method->nd_clss; body = ent->method->nd_body; } else if ((method = rb_get_method_body(klass, id, &id)) != 0) { noex = method->nd_noex; klass = method->nd_clss; body = method->nd_body; } else { if (scope == 3) { return method_missing(recv, mid, argc, argv, NOEX_SUPER); } return method_missing(recv, mid, argc, argv, scope == 2 ? NOEX_VCALL : 0); } if (mid != idMethodMissing) { /* receiver specified form for private method */ if (UNLIKELY(noex)) { if (((noex & NOEX_MASK) & NOEX_PRIVATE) && scope == 0) { return method_missing(recv, mid, argc, argv, NOEX_PRIVATE); } /* self must be kind of a specified form for protected method */ if (((noex & NOEX_MASK) & NOEX_PROTECTED) && scope == 0) { VALUE defined_class = klass; if (TYPE(defined_class) == T_ICLASS) { defined_class = RBASIC(defined_class)->klass; } if (self == Qundef) { self = th->cfp->self; } if (!rb_obj_is_kind_of(self, rb_class_real(defined_class))) { return method_missing(recv, mid, argc, argv, NOEX_PROTECTED); } } if (NOEX_SAFE(noex) > th->safe_level) { rb_raise(rb_eSecurityError, "calling insecure method: %s", rb_id2name(mid)); } } } stack_check(); return vm_call0(th, klass, recv, mid, id, argc, argv, body, noex & NOEX_NOSUPER); }