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Diffstat (limited to 'tool/ruby_vm/views/_leaf_helpers.erb')
-rw-r--r-- | tool/ruby_vm/views/_leaf_helpers.erb | 105 |
1 files changed, 105 insertions, 0 deletions
diff --git a/tool/ruby_vm/views/_leaf_helpers.erb b/tool/ruby_vm/views/_leaf_helpers.erb new file mode 100644 index 0000000000..00c2e3882a --- /dev/null +++ b/tool/ruby_vm/views/_leaf_helpers.erb @@ -0,0 +1,105 @@ +%# -*- mode:c; style:ruby; coding: utf-8; indent-tabs-mode: nil -*- +%# Copyright (c) 2018 Urabe, Shyouhei. All rights reserved. +%# +%# This file is a part of the programming language Ruby. Permission is hereby +%# granted, to either redistribute and/or modify this file, provided that the +%# conditions mentioned in the file COPYING are met. Consult the file for +%# details. +%; + +static bool +leafness_of_getglobal(VALUE gentry) +{ + const struct rb_global_entry *e = (void *)gentry; + + if (UNLIKELY(rb_gvar_is_traced(e))) { + return false; + } + else { + /* We cannot write this function using a switch() because a + * case label cannot be a function pointer. */ + static rb_gvar_getter_t *const whitelist[] = { + rb_gvar_val_getter, + rb_gvar_var_getter, + rb_gvar_undef_getter, + }; + rb_gvar_getter_t *f = rb_gvar_getter_function_of(e); + int i; + + for (i = 0; i < numberof(whitelist); i++) { + if (f == whitelist[i]) { + return true; + } + } + return false; + } +} + +static bool +leafness_of_setglobal(VALUE gentry) +{ + const struct rb_global_entry *e = (void *)gentry; + + if (UNLIKELY(rb_gvar_is_traced(e))) { + return false; + } + else { + /* We cannot write this function using a switch() because a + * case label cannot be a function pointer. */ + static rb_gvar_setter_t *const whitelist[] = { + rb_gvar_val_setter, + rb_gvar_readonly_setter, + rb_gvar_var_setter, + rb_gvar_undef_setter, + }; + rb_gvar_setter_t *f = rb_gvar_setter_function_of(e); + int i; + + for (i = 0; i < numberof(whitelist); i++) { + if (f == whitelist[i]) { + return true; + } + } + return false; + } +} + +#include "iseq.h" + +static bool +leafness_of_defined(rb_num_t op_type) +{ + /* see also: vm_insnhelper.c:vm_defined() */ + switch (op_type) { + case DEFINED_IVAR: + case DEFINED_IVAR2: + case DEFINED_GVAR: + case DEFINED_CVAR: + case DEFINED_YIELD: + case DEFINED_REF: + case DEFINED_ZSUPER: + return false; + case DEFINED_CONST: + /* has rb_autoload_load(); */ + return false; + case DEFINED_FUNC: + case DEFINED_METHOD: + /* calls #respond_to_missing? */ + return false; + default: + rb_bug("unknown operand %ld: blame @shyouhei.", op_type); + } +} + +static bool +leafness_of_checkmatch(rb_num_t flag) +{ + /* see also: vm_insnhelper.c:check_match() */ + if (flag == VM_CHECKMATCH_TYPE_WHEN) { + return true; + } + else { + /* has rb_funcallv() */ + return false; + } +} |