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trying to detect prohibited access to an instance vairables in a class method.

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inventing the class instantiation method concept
This commit is contained in:
hyung-hwan
2022-02-24 16:47:26 +00:00
parent 6d409c809f
commit 50c04bb770
4 changed files with 92 additions and 36 deletions
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4
lib/cnode.c
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@ -87,6 +87,10 @@ hcl_cnode_t* hcl_makecnodetrpcolons (hcl_t* hcl, const hcl_ioloc_t* loc, const
return make_cnode(hcl, HCL_CNODE_TRPCOLONS, loc, tok); return make_cnode(hcl, HCL_CNODE_TRPCOLONS, loc, tok);
} }
hcl_cnode_t* hcl_makecnodedcstar (hcl_t* hcl, const hcl_ioloc_t* loc, const hcl_oocs_t* tok)
{
return make_cnode(hcl, HCL_CNODE_DCSTAR, loc, tok);
}
hcl_cnode_t* hcl_makecnodecharlit (hcl_t* hcl, const hcl_ioloc_t* loc, const hcl_oocs_t* tok, const hcl_ooch_t v) hcl_cnode_t* hcl_makecnodecharlit (hcl_t* hcl, const hcl_ioloc_t* loc, const hcl_oocs_t* tok, const hcl_ooch_t v)
{ {

81
lib/comp.c
View File

@ -43,6 +43,14 @@ enum
VAR_ACCESS_STORE VAR_ACCESS_STORE
}; };
enum
{
FUN_PLAIN, /* plain function */
FUN_IM, /* instance method */
FUN_CM, /* class method */
FUN_CIM /* class instantiation method */
};
#define TV_BUFFER_ALIGN 256 #define TV_BUFFER_ALIGN 256
#define BLK_INFO_BUFFER_ALIGN 128 #define BLK_INFO_BUFFER_ALIGN 128
@ -216,7 +224,7 @@ static int is_in_class_init_scope (hcl_t* hcl)
{ {
hcl_fnblk_info_t* fbi; hcl_fnblk_info_t* fbi;
fbi = &hcl->c->fnblk.info[hcl->c->fnblk.depth]; fbi = &hcl->c->fnblk.info[hcl->c->fnblk.depth];
return (fbi->clsblk_top >= 0); return fbi->clsblk_top >= 0;
} }
static int is_in_class_method_scope (hcl_t* hcl) static int is_in_class_method_scope (hcl_t* hcl)
@ -262,8 +270,8 @@ static int find_variable_backward (hcl_t* hcl, const hcl_cnode_t* token, hcl_var
if (fbi->clsblk_top >= 0) if (fbi->clsblk_top >= 0)
{ {
/* this function block has a class defined. /* this function block has a class defined.
* that is, it is in the class defintion scope. * that is, it is in a class defintion.
* variable lookup must be limited to class scope */ * variable lookup must be limited to the class scope */
hcl_clsblk_info_t* clsbi; hcl_clsblk_info_t* clsbi;
#if 0 #if 0
@ -281,9 +289,17 @@ static int find_variable_backward (hcl_t* hcl, const hcl_cnode_t* token, hcl_var
{ {
if (i >= hcl->c->fnblk.depth) if (i >= hcl->c->fnblk.depth)
{ {
/* instance variables are not accessible if not in method definition scope. /* instance variables are accessible only in an instance method defintion scope.
* it is in class initialization scope */ * it is in class initialization scope */
hcl_setsynerrbfmt (hcl, HCL_SYNERR_BANNED, HCL_CNODE_GET_LOC(token), name, "prohibited to access an instance variable"); hcl_setsynerrbfmt (hcl, HCL_SYNERR_BANNED, HCL_CNODE_GET_LOC(token), name, "prohibited access to an instance variable");
return -1;
}
if (hcl->c->fnblk.info[hcl->c->fnblk.depth].fun_type == FUN_CM)
{
/* TODO: check if it's a block inside a method ... */
/* the function where this variable is defined is a class method */
hcl_setsynerrbfmt (hcl, HCL_SYNERR_BANNED, HCL_CNODE_GET_LOC(token), name, "prohibited access to an instance variable in a class method");
return -1; return -1;
} }
@ -987,7 +1003,7 @@ static void pop_clsblk (hcl_t* hcl)
static int push_fnblk (hcl_t* hcl, const hcl_ioloc_t* errloc, static int push_fnblk (hcl_t* hcl, const hcl_ioloc_t* errloc,
hcl_oow_t tmpr_va, hcl_oow_t tmpr_nargs, hcl_oow_t tmpr_nrvars, hcl_oow_t tmpr_nlvars, hcl_oow_t tmpr_va, hcl_oow_t tmpr_nargs, hcl_oow_t tmpr_nrvars, hcl_oow_t tmpr_nlvars,
hcl_oow_t tmpr_count, hcl_oow_t tmpr_len, hcl_oow_t make_inst_pos, hcl_oow_t lfbase) hcl_oow_t tmpr_count, hcl_oow_t tmpr_len, hcl_oow_t make_inst_pos, hcl_oow_t lfbase, int fun_type)
{ {
hcl_oow_t new_depth; hcl_oow_t new_depth;
hcl_fnblk_info_t* fbi; hcl_fnblk_info_t* fbi;
@ -1016,6 +1032,8 @@ static int push_fnblk (hcl_t* hcl, const hcl_ioloc_t* errloc,
fbi = &hcl->c->fnblk.info[new_depth]; fbi = &hcl->c->fnblk.info[new_depth];
HCL_MEMSET (fbi, 0, HCL_SIZEOF(*fbi)); HCL_MEMSET (fbi, 0, HCL_SIZEOF(*fbi));
fbi->fun_type = fun_type;
fbi->tmprlen = tmpr_len; fbi->tmprlen = tmpr_len;
fbi->tmprcnt = tmpr_count; fbi->tmprcnt = tmpr_count;
fbi->tmpr_va = tmpr_va; fbi->tmpr_va = tmpr_va;
@ -1032,6 +1050,7 @@ static int push_fnblk (hcl_t* hcl, const hcl_ioloc_t* errloc,
fbi->make_inst_pos = make_inst_pos; fbi->make_inst_pos = make_inst_pos;
fbi->lfbase = lfbase; fbi->lfbase = lfbase;
fbi->access_outer = 0; fbi->access_outer = 0;
fbi->accessed_by_inner = 0; fbi->accessed_by_inner = 0;
@ -2277,7 +2296,9 @@ static HCL_INLINE int compile_class_p2 (hcl_t* hcl)
if (emit_byte_instruction(hcl, HCL_CODE_CLASS_PEXIT, HCL_CNODE_GET_LOC(cf->operand)) <= -1) return -1; if (emit_byte_instruction(hcl, HCL_CODE_CLASS_PEXIT, HCL_CNODE_GET_LOC(cf->operand)) <= -1) return -1;
// if (cf->operand) #if 0
if (cf->operand)
#endif
{ {
/* (defclass X() ; this x refers to a variable in the outer scope. /* (defclass X() ; this x refers to a variable in the outer scope.
* ::: | t1 t2 x | * ::: | t1 t2 x |
@ -2317,12 +2338,9 @@ static HCL_INLINE int compile_class_p2 (hcl_t* hcl)
#endif #endif
} }
return 0; return 0;
} }
/* ========================================================================= */ /* ========================================================================= */
static int compile_lambda (hcl_t* hcl, hcl_cnode_t* src, int defun) static int compile_lambda (hcl_t* hcl, hcl_cnode_t* src, int defun)
@ -2333,7 +2351,7 @@ static int compile_lambda (hcl_t* hcl, hcl_cnode_t* src, int defun)
hcl_oow_t saved_tv_wcount, tv_dup_start; hcl_oow_t saved_tv_wcount, tv_dup_start;
hcl_cnode_t* defun_name; hcl_cnode_t* defun_name;
hcl_cframe_t* cf; hcl_cframe_t* cf;
int is_class_method = 0; int fun_type = FUN_PLAIN;
HCL_ASSERT (hcl, HCL_CNODE_IS_CONS(src)); HCL_ASSERT (hcl, HCL_CNODE_IS_CONS(src));
@ -2357,19 +2375,26 @@ static int compile_lambda (hcl_t* hcl, hcl_cnode_t* src, int defun)
} }
defun_name = HCL_CNODE_CONS_CAR(obj); defun_name = HCL_CNODE_CONS_CAR(obj);
if (is_in_class_init_scope(hcl) && HCL_CNODE_IS_TRPCOLONS(defun_name)) if (is_in_class_init_scope(hcl))
{
if ((HCL_CNODE_IS_TRPCOLONS(defun_name) || HCL_CNODE_IS_DCSTAR(defun_name)))
{ {
/* class method - (defun ::: xxxx () ...) inside class definition */ /* class method - (defun ::: xxxx () ...) inside class definition */
obj = HCL_CNODE_CONS_CDR(obj); obj = HCL_CNODE_CONS_CDR(obj);
if (!obj) if (!obj)
{ {
hcl_setsynerrbfmt (hcl, HCL_SYNERR_ARGNAMELIST, HCL_CNODE_GET_LOC(src), HCL_NULL, "no method name name in %.*js", HCL_CNODE_GET_TOKLEN(cmd), HCL_CNODE_GET_TOKPTR(cmd)); hcl_setsynerrbfmt (hcl, HCL_SYNERR_ARGNAMELIST, HCL_CNODE_GET_LOC(src), HCL_NULL, "no name in %.*js", HCL_CNODE_GET_TOKLEN(cmd), HCL_CNODE_GET_TOKPTR(cmd));
return -1; return -1;
} }
is_class_method = 1; fun_type = HCL_CNODE_IS_TRPCOLONS(defun_name)? FUN_CM: FUN_CIM;
defun_name = HCL_CNODE_CONS_CAR(obj); /* advance to the actual name */ defun_name = HCL_CNODE_CONS_CAR(obj); /* advance to the actual name */
} }
else
{
fun_type = FUN_IM;
}
}
if (!HCL_CNODE_IS_SYMBOL(defun_name)) if (!HCL_CNODE_IS_SYMBOL(defun_name))
{ {
@ -2540,7 +2565,7 @@ static int compile_lambda (hcl_t* hcl, hcl_cnode_t* src, int defun)
HCL_ASSERT (hcl, nargs + nrvars + nlvars == hcl->c->tv.wcount - saved_tv_wcount); HCL_ASSERT (hcl, nargs + nrvars + nlvars == hcl->c->tv.wcount - saved_tv_wcount);
if (push_fnblk(hcl, HCL_CNODE_GET_LOC(src), va, nargs, nrvars, nlvars, hcl->c->tv.wcount, hcl->c->tv.s.len, hcl->code.bc.len, hcl->code.lit.len) <= -1) return -1; if (push_fnblk(hcl, HCL_CNODE_GET_LOC(src), va, nargs, nrvars, nlvars, hcl->c->tv.wcount, hcl->c->tv.s.len, hcl->code.bc.len, hcl->code.lit.len, fun_type) <= -1) return -1;
if (hcl->option.trait & HCL_TRAIT_INTERACTIVE) if (hcl->option.trait & HCL_TRAIT_INTERACTIVE)
{ {
@ -2566,11 +2591,11 @@ static int compile_lambda (hcl_t* hcl, hcl_cnode_t* src, int defun)
SWITCH_TOP_CFRAME (hcl, COP_COMPILE_OBJECT_LIST, obj); /* 1 */ SWITCH_TOP_CFRAME (hcl, COP_COMPILE_OBJECT_LIST, obj); /* 1 */
PUSH_SUBCFRAME (hcl, COP_POST_LAMBDA, defun_name); /* 3*/ PUSH_SUBCFRAME (hcl, COP_POST_LAMBDA, defun_name); /* 3*/
cf = GET_SUBCFRAME(hcl); cf = GET_SUBCFRAME(hcl);
cf->u.lambda.is_class_method = is_class_method; cf->u.lambda.fun_type = fun_type;
PUSH_SUBCFRAME (hcl, COP_EMIT_LAMBDA, src); /* 2 */ PUSH_SUBCFRAME (hcl, COP_EMIT_LAMBDA, src); /* 2 */
cf = GET_SUBCFRAME(hcl); cf = GET_SUBCFRAME(hcl);
cf->u.lambda.is_class_method = is_class_method; cf->u.lambda.fun_type = fun_type;
cf->u.lambda.jump_inst_pos = jump_inst_pos; cf->u.lambda.jump_inst_pos = jump_inst_pos;
if (hcl->option.trait & HCL_TRAIT_INTERACTIVE) if (hcl->option.trait & HCL_TRAIT_INTERACTIVE)
@ -4846,14 +4871,22 @@ static HCL_INLINE int post_lambda (hcl_t* hcl)
if (x == 0) if (x == 0)
{ {
/* arrange to save to the method slot */ /* arrange to save to the method slot */
if (cf->u.lambda.is_class_method) switch (cf->u.lambda.fun_type)
{ {
case FUN_CM: /* class method */
case FUN_CIM: /* class instantiation method */
SWITCH_TOP_CFRAME (hcl, COP_EMIT_CLASS_CMSTORE, defun_name); SWITCH_TOP_CFRAME (hcl, COP_EMIT_CLASS_CMSTORE, defun_name);
} break;
else
{ case FUN_IM: /* instance method */
/* instance method */
SWITCH_TOP_CFRAME (hcl, COP_EMIT_CLASS_IMSTORE, defun_name); SWITCH_TOP_CFRAME (hcl, COP_EMIT_CLASS_IMSTORE, defun_name);
break;
default:
/* in the class initialization scope, the type must not be other than the listed above */
HCL_DEBUG1 (hcl, "Internal error - invalid method type %d\n", cf->u.lambda.fun_type);
hcl_seterrbfmt (hcl, HCL_EINTERN, "internal error - invalid method type %d", cf->u.lambda.fun_type);
break;
} }
cf = GET_TOP_CFRAME(hcl); cf = GET_TOP_CFRAME(hcl);
} }
@ -5079,7 +5112,7 @@ int hcl_compile (hcl_t* hcl, hcl_cnode_t* obj, int flags)
* pass HCL_TYPE_MAX(hcl_oow_t) as make_inst_pos because there is * pass HCL_TYPE_MAX(hcl_oow_t) as make_inst_pos because there is
* no actual MAKE_BLOCK/MAKE_FUNCTION instruction which otherwise * no actual MAKE_BLOCK/MAKE_FUNCTION instruction which otherwise
* would be patched in pop_fnblk(). */ * would be patched in pop_fnblk(). */
if (push_fnblk(hcl, HCL_NULL, 0, 0, 0, hcl->c->tv.wcount, hcl->c->tv.wcount, hcl->c->tv.s.len, HCL_TYPE_MAX(hcl_oow_t), 0) <= -1) return -1; /* must not goto oops */ if (push_fnblk(hcl, HCL_NULL, 0, 0, 0, hcl->c->tv.wcount, hcl->c->tv.wcount, hcl->c->tv.s.len, HCL_TYPE_MAX(hcl_oow_t), 0, FUN_PLAIN) <= -1) return -1; /* must not goto oops */
} }
top_fnblk_saved = hcl->c->fnblk.info[0]; top_fnblk_saved = hcl->c->fnblk.info[0];
HCL_ASSERT (hcl, hcl->c->fnblk.depth == 0); /* ensure the virtual function block is added */ HCL_ASSERT (hcl, hcl->c->fnblk.depth == 0); /* ensure the virtual function block is added */
@ -5288,7 +5321,7 @@ int hcl_compile (hcl_t* hcl, hcl_cnode_t* obj, int flags)
default: default:
HCL_DEBUG1 (hcl, "Internal error - invalid compiler opcode %d\n", cf->opcode); HCL_DEBUG1 (hcl, "Internal error - invalid compiler opcode %d\n", cf->opcode);
hcl_seterrbfmt (hcl, HCL_EINTERN, "invalid compiler opcode %d", cf->opcode); hcl_seterrbfmt (hcl, HCL_EINTERN, "internal error - invalid compiler opcode %d", cf->opcode);
goto oops; goto oops;
} }
} }

10
lib/hcl-prv.h
View File

@ -152,7 +152,8 @@ enum hcl_iotok_type_t
HCL_IOTOK_DOT, HCL_IOTOK_DOT,
HCL_IOTOK_ELLIPSIS, HCL_IOTOK_ELLIPSIS,
HCL_IOTOK_COLON, HCL_IOTOK_COLON,
HCL_IOTOK_TRPCOLONS, HCL_IOTOK_TRPCOLONS, /* ::: */
HCL_IOTOK_DCSTAR, /* ::* */
HCL_IOTOK_COMMA, HCL_IOTOK_COMMA,
HCL_IOTOK_LPAREN, /* ( */ HCL_IOTOK_LPAREN, /* ( */
HCL_IOTOK_RPAREN, /* ) */ HCL_IOTOK_RPAREN, /* ) */
@ -204,6 +205,7 @@ enum hcl_cnode_type_t
HCL_CNODE_SUPER, HCL_CNODE_SUPER,
HCL_CNODE_ELLIPSIS, HCL_CNODE_ELLIPSIS,
HCL_CNODE_TRPCOLONS, HCL_CNODE_TRPCOLONS,
HCL_CNODE_DCSTAR,
HCL_CNODE_CONS, HCL_CNODE_CONS,
HCL_CNODE_ELIST, /* empty list */ HCL_CNODE_ELIST, /* empty list */
@ -219,6 +221,7 @@ typedef enum hcl_cnode_type_t hcl_cnode_type_t;
#define HCL_CNODE_IS_ELLIPSIS(x) ((x)->cn_type == HCL_CNODE_ELLIPSIS) #define HCL_CNODE_IS_ELLIPSIS(x) ((x)->cn_type == HCL_CNODE_ELLIPSIS)
#define HCL_CNODE_IS_TRPCOLONS(x) ((x)->cn_type == HCL_CNODE_TRPCOLONS) #define HCL_CNODE_IS_TRPCOLONS(x) ((x)->cn_type == HCL_CNODE_TRPCOLONS)
#define HCL_CNODE_IS_DCSTAR(x) ((x)->cn_type == HCL_CNODE_DCSTAR)
#define HCL_CNODE_IS_SYMBOL(x) ((x)->cn_type == HCL_CNODE_SYMBOL) #define HCL_CNODE_IS_SYMBOL(x) ((x)->cn_type == HCL_CNODE_SYMBOL)
#define HCL_CNODE_IS_SYMBOL_PLAIN(x) ((x)->cn_type == HCL_CNODE_SYMBOL && (x)->u.symbol.syncode == 0) #define HCL_CNODE_IS_SYMBOL_PLAIN(x) ((x)->cn_type == HCL_CNODE_SYMBOL && (x)->u.symbol.syncode == 0)
@ -390,7 +393,7 @@ struct hcl_cframe_t
/* COP_POST_LAMBDA, COP_EMIT_LAMBDA */ /* COP_POST_LAMBDA, COP_EMIT_LAMBDA */
struct struct
{ {
int is_class_method; int fun_type;
hcl_oow_t jump_inst_pos; hcl_oow_t jump_inst_pos;
hcl_ooi_t lfbase_pos; hcl_ooi_t lfbase_pos;
hcl_ooi_t lfsize_pos; hcl_ooi_t lfsize_pos;
@ -436,6 +439,8 @@ typedef struct hcl_cblk_info_t hcl_cblk_info_t;
/* function block information for the compiler */ /* function block information for the compiler */
struct hcl_fnblk_info_t struct hcl_fnblk_info_t
{ {
int fun_type;
hcl_oow_t tmprlen; /* accumulated length of the temporaries string including outer blocks */ hcl_oow_t tmprlen; /* accumulated length of the temporaries string including outer blocks */
hcl_oow_t tmprcnt; /* accumulated number of temporaries including outer blocks */ hcl_oow_t tmprcnt; /* accumulated number of temporaries including outer blocks */
@ -1512,6 +1517,7 @@ hcl_cnode_t* hcl_makecnodeself (hcl_t* hcl, const hcl_ioloc_t* loc, const hcl_o
hcl_cnode_t* hcl_makecnodesuper (hcl_t* hcl, const hcl_ioloc_t* loc, const hcl_oocs_t* tok); hcl_cnode_t* hcl_makecnodesuper (hcl_t* hcl, const hcl_ioloc_t* loc, const hcl_oocs_t* tok);
hcl_cnode_t* hcl_makecnodeellipsis (hcl_t* hcl, const hcl_ioloc_t* loc, const hcl_oocs_t* tok); hcl_cnode_t* hcl_makecnodeellipsis (hcl_t* hcl, const hcl_ioloc_t* loc, const hcl_oocs_t* tok);
hcl_cnode_t* hcl_makecnodetrpcolons (hcl_t* hcl, const hcl_ioloc_t* loc, const hcl_oocs_t* tok); hcl_cnode_t* hcl_makecnodetrpcolons (hcl_t* hcl, const hcl_ioloc_t* loc, const hcl_oocs_t* tok);
hcl_cnode_t* hcl_makecnodedcstar (hcl_t* hcl, const hcl_ioloc_t* loc, const hcl_oocs_t* tok);
hcl_cnode_t* hcl_makecnodecharlit (hcl_t* hcl, const hcl_ioloc_t* loc, const hcl_oocs_t* tok, const hcl_ooch_t v); hcl_cnode_t* hcl_makecnodecharlit (hcl_t* hcl, const hcl_ioloc_t* loc, const hcl_oocs_t* tok, const hcl_ooch_t v);
hcl_cnode_t* hcl_makecnodesymbol (hcl_t* hcl, const hcl_ioloc_t* loc, const hcl_oocs_t* tok); hcl_cnode_t* hcl_makecnodesymbol (hcl_t* hcl, const hcl_ioloc_t* loc, const hcl_oocs_t* tok);
hcl_cnode_t* hcl_makecnodedsymbol (hcl_t* hcl, const hcl_ioloc_t* loc, const hcl_oocs_t* tok); hcl_cnode_t* hcl_makecnodedsymbol (hcl_t* hcl, const hcl_ioloc_t* loc, const hcl_oocs_t* tok);

13
lib/read.c
View File

@ -1153,6 +1153,15 @@ retry:
ADD_TOKEN_CHAR (hcl, c); ADD_TOKEN_CHAR (hcl, c);
break; break;
} }
else if (c == '*')
{
/* double-cloned star */
SET_TOKEN_TYPE (hcl, HCL_IOTOK_DCSTAR);
ADD_TOKEN_CHAR (hcl, oldc);
ADD_TOKEN_CHAR (hcl, oldc2);
ADD_TOKEN_CHAR (hcl, c);
break;
}
unget_char (hcl, &hcl->c->lxc); unget_char (hcl, &hcl->c->lxc);
unget_char (hcl, &sd); unget_char (hcl, &sd);
@ -2008,6 +2017,10 @@ static hcl_cnode_t* read_object (hcl_t* hcl)
obj = hcl_makecnodetrpcolons(hcl, TOKEN_LOC(hcl), TOKEN_NAME(hcl)); obj = hcl_makecnodetrpcolons(hcl, TOKEN_LOC(hcl), TOKEN_NAME(hcl));
break; break;
case HCL_IOTOK_DCSTAR:
obj = hcl_makecnodedcstar(hcl, TOKEN_LOC(hcl), TOKEN_NAME(hcl));
break;
case HCL_IOTOK_SMPTRLIT: case HCL_IOTOK_SMPTRLIT:
{ {
hcl_oow_t i; hcl_oow_t i;