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add new instruction attribute called leaf

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An instruction is leaf if it has no rb_funcall inside.  In order to
check this property, we introduce stack canary which is a random
number collected at runtime.  Stack top is always filled with this
number and checked for stack smashing operations, when VM_CHECK_MODE.
[GH-1947]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@64677 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
shyouhei 2018-09-11 09:48:58 +00:00
parent ecda2d23d5
commit c2bfb4e93c
10 changed files with 279 additions and 1 deletions
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7
internal.h
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@ -1901,6 +1901,9 @@ VALUE rb_ivar_lookup(VALUE obj, ID id, VALUE undef);
void rb_autoload_str(VALUE mod, ID id, VALUE file);
void rb_deprecate_constant(VALUE mod, const char *name);
NORETURN(VALUE rb_mod_const_missing(VALUE,VALUE));
rb_gvar_getter_t *rb_gvar_getter_function_of(const struct rb_global_entry *);
rb_gvar_setter_t *rb_gvar_setter_function_of(const struct rb_global_entry *);
bool rb_gvar_is_traced(const struct rb_global_entry *);
/* vm_insnhelper.h */
rb_serial_t rb_next_class_serial(void);
@ -1946,6 +1949,7 @@ VALUE rb_lambda_call(VALUE obj, ID mid, int argc, const VALUE *argv,
/* vm_insnhelper.c */
VALUE rb_equal_opt(VALUE obj1, VALUE obj2);
VALUE rb_eql_opt(VALUE obj1, VALUE obj2);
void Init_vm_stack_canary(void);
/* vm_method.c */
void Init_eval_method(void);
@ -2099,6 +2103,9 @@ VALUE rb_imemo_new_debug(enum imemo_type type, VALUE v1, VALUE v2, VALUE v3, VAL
VALUE rb_imemo_new(enum imemo_type type, VALUE v1, VALUE v2, VALUE v3, VALUE v0);
#endif
/* random.c */
int fill_random_bytes(void *, size_t, int);
RUBY_SYMBOL_EXPORT_END
#define RUBY_DTRACE_CREATE_HOOK(name, arg) \