/* Shared helper to implement ES6 Object.setPrototypeOf and
* Object.prototype.__proto__ setter.
*
* https://people.mozilla.org/~jorendorff/es6-draft.html#sec-get-object.prototype.__proto__
* https://people.mozilla.org/~jorendorff/es6-draft.html#sec-object.setprototypeof
*/
duk_ret_t duk_bi_object_setprototype_shared(duk_context *ctx) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_hobject *h_obj;
duk_hobject *h_new_proto;
duk_hobject *h_curr;
duk_ret_t ret_success = 1; /* retval for success path */
/* Preliminaries for __proto__ and setPrototypeOf (E6 19.1.2.18 steps 1-4);
* magic: 0=setter call, 1=Object.setPrototypeOf
*/
if (duk_get_current_magic(ctx) == 0) {
duk_push_this_check_object_coercible(ctx);
duk_insert(ctx, 0);
if (!duk_check_type_mask(ctx, 1, DUK_TYPE_MASK_NULL | DUK_TYPE_MASK_OBJECT)) {
return 0;
}
/* __proto__ setter returns 'undefined' on success unlike the
* setPrototypeOf() call which returns the target object.
*/
ret_success = 0;
} else {
duk_require_object_coercible(ctx, 0);
duk_require_type_mask(ctx, 1, DUK_TYPE_MASK_NULL | DUK_TYPE_MASK_OBJECT);
}
h_obj = duk_get_hobject(ctx, 0);
if (!h_obj) {
goto skip;
}
h_new_proto = duk_get_hobject(ctx, 1);
DUK_ASSERT(h_obj != NULL);
/* h_new_proto may be NULL */
/* [[SetPrototypeOf]] standard behavior, E6 9.1.2 */
/* NOTE: steps 7-8 seem to be a cut-paste bug in the E6 draft */
/* TODO: implement Proxy object support here */
if (h_new_proto == h_obj->prototype) {
goto skip;
}
if (!DUK_HOBJECT_HAS_EXTENSIBLE(h_obj)) {
goto fail_nonextensible;
}
for (h_curr = h_new_proto; h_curr != NULL; h_curr = h_curr->prototype) {
/* Loop prevention */
if (h_curr == h_obj) {
goto fail_loop;
}
}
DUK_HOBJECT_SET_PROTOTYPE_UPDREF(thr, h_obj, h_new_proto);
/* fall thru */
skip:
duk_set_top(ctx, 1);
return ret_success;
fail_nonextensible:
fail_loop:
return DUK_RET_TYPE_ERROR;
}
duk_ret_t duk_bi_object_constructor_is_extensible(duk_context *ctx) {
duk_hobject *h;
h = duk_require_hobject(ctx, 0);
DUK_ASSERT(h != NULL);
duk_push_boolean(ctx, DUK_HOBJECT_HAS_EXTENSIBLE(h));
return 1;
}
DUK_INTERNAL duk_ret_t duk_bi_object_constructor_is_extensible(duk_context *ctx) {
duk_hobject *h;
h = duk_require_hobject_or_lfunc(ctx, 0);
if (!h) {
duk_push_false(ctx);
} else {
duk_push_boolean(ctx, DUK_HOBJECT_HAS_EXTENSIBLE(h));
}
return 1;
}
duk_ret_t duk_bi_number_constructor(duk_context *ctx) {
duk_idx_t nargs;
duk_hobject *h_this;
/*
* The Number constructor uses ToNumber(arg) for number coercion
* (coercing an undefined argument to NaN). However, if the
* argument is not given at all, +0 must be used instead. To do
* this, a vararg function is used.
*/
nargs = duk_get_top(ctx);
if (nargs == 0) {
duk_push_int(ctx, 0);
}
duk_to_number(ctx, 0);
duk_set_top(ctx, 1);
DUK_ASSERT_TOP(ctx, 1);
if (!duk_is_constructor_call(ctx)) {
return 1;
}
/*
* E5 Section 15.7.2.1 requires that the constructed object
* must have the original Number.prototype as its internal
* prototype. However, since Number.prototype is non-writable
* and non-configurable, this doesn't have to be enforced here:
* The default object (bound to 'this') is OK, though we have
* to change its class.
*
* Internal value set to ToNumber(arg) or +0; if no arg given,
* ToNumber(undefined) = NaN, so special treatment is needed
* (above). String internal value is immutable.
*/
/* XXX: helper */
duk_push_this(ctx);
h_this = duk_get_hobject(ctx, -1);
DUK_ASSERT(h_this != NULL);
DUK_HOBJECT_SET_CLASS_NUMBER(h_this, DUK_HOBJECT_CLASS_NUMBER);
DUK_ASSERT(h_this->prototype == ((duk_hthread *) ctx)->builtins[DUK_BIDX_NUMBER_PROTOTYPE]);
DUK_ASSERT(DUK_HOBJECT_GET_CLASS_NUMBER(h_this) == DUK_HOBJECT_CLASS_NUMBER);
DUK_ASSERT(DUK_HOBJECT_HAS_EXTENSIBLE(h_this));
duk_dup(ctx, 0); /* -> [ val obj val ] */
duk_def_prop_stridx(ctx, -2, DUK_STRIDX_INT_VALUE, DUK_PROPDESC_FLAGS_NONE);
return 0; /* no return value -> don't replace created value */
}
DUK_INTERNAL void duk_err_augment_error_create(duk_hthread *thr, duk_hthread *thr_callstack, const char *c_filename, duk_int_t c_line, duk_bool_t noblame_fileline) {
duk_context *ctx = (duk_context *) thr;
duk_hobject *obj;
DUK_ASSERT(thr != NULL);
DUK_ASSERT(thr_callstack != NULL);
DUK_ASSERT(ctx != NULL);
/* [ ... error ] */
/*
* Criteria for augmenting:
*
* - augmentation enabled in build (naturally)
* - error value internal prototype chain contains the built-in
* Error prototype object (i.e. 'val instanceof Error')
*
* Additional criteria for built-in augmenting:
*
* - error value is an extensible object
*/
obj = duk_get_hobject(ctx, -1);
if (!obj) {
DUK_DDD(DUK_DDDPRINT("value is not an object, skip both built-in and user augment"));
return;
}
if (!duk_hobject_prototype_chain_contains(thr, obj, thr->builtins[DUK_BIDX_ERROR_PROTOTYPE], 1 /*ignore_loop*/)) {
/* If the value has a prototype loop, it's critical not to
* throw here. Instead, assume the value is not to be
* augmented.
*/
DUK_DDD(DUK_DDDPRINT("value is not an error instance, skip both built-in and user augment"));
return;
}
if (DUK_HOBJECT_HAS_EXTENSIBLE(obj)) {
DUK_DDD(DUK_DDDPRINT("error meets criteria, built-in augment"));
duk__err_augment_builtin_create(thr, thr_callstack, c_filename, c_line, noblame_fileline, obj);
} else {
DUK_DDD(DUK_DDDPRINT("error does not meet criteria, no built-in augment"));
}
/* [ ... error ] */
#if defined(DUK_USE_ERRCREATE)
duk__err_augment_user(thr, DUK_STRIDX_ERR_CREATE);
#endif
}
DUK_INTERNAL duk_ret_t duk_bi_object_constructor_is_extensible(duk_hthread *thr) {
/*
* magic = 0: Object.isExtensible()
* magic = 1: Reflect.isExtensible()
*/
duk_hobject *h;
if (duk_get_current_magic(thr) == 0) {
h = duk_get_hobject(thr, 0);
} else {
/* Reflect.isExtensible(): throw if non-object, but we accept lightfuncs
* and plain buffers here because they pretend to be objects.
*/
h = duk_require_hobject_accept_mask(thr, 0, DUK_TYPE_MASK_LIGHTFUNC | DUK_TYPE_MASK_BUFFER);
}
duk_push_boolean(thr, (h != NULL) && DUK_HOBJECT_HAS_EXTENSIBLE(h));
return 1;
}
void duk_debug_dump_hobject(duk_hobject *obj) {
duk_uint_fast32_t i;
const char *str_empty = "";
const char *str_excl = "!";
DUK_D(DUK_DPRINT("=== hobject %p ===", (void *) obj));
if (!obj) {
return;
}
DUK_D(DUK_DPRINT(" %sextensible", DUK_HOBJECT_HAS_EXTENSIBLE(obj) ? str_empty : str_excl));
DUK_D(DUK_DPRINT(" %sconstructable", DUK_HOBJECT_HAS_CONSTRUCTABLE(obj) ? str_empty : str_excl));
DUK_D(DUK_DPRINT(" %sbound", DUK_HOBJECT_HAS_BOUND(obj) ? str_empty : str_excl));
DUK_D(DUK_DPRINT(" %scompiledfunction", DUK_HOBJECT_HAS_COMPILEDFUNCTION(obj) ? str_empty : str_excl));
DUK_D(DUK_DPRINT(" %snativefunction", DUK_HOBJECT_HAS_NATIVEFUNCTION(obj) ? str_empty : str_excl));
DUK_D(DUK_DPRINT(" %sthread", DUK_HOBJECT_HAS_THREAD(obj) ? str_empty : str_excl));
DUK_D(DUK_DPRINT(" %sarray_part", DUK_HOBJECT_HAS_ARRAY_PART(obj) ? str_empty : str_excl));
DUK_D(DUK_DPRINT(" %sstrict", DUK_HOBJECT_HAS_STRICT(obj) ? str_empty : str_excl));
DUK_D(DUK_DPRINT(" %snewenv", DUK_HOBJECT_HAS_NEWENV(obj) ? str_empty : str_excl));
DUK_D(DUK_DPRINT(" %snamebinding", DUK_HOBJECT_HAS_NAMEBINDING(obj) ? str_empty : str_excl));
DUK_D(DUK_DPRINT(" %screateargs", DUK_HOBJECT_HAS_CREATEARGS(obj) ? str_empty : str_excl));
DUK_D(DUK_DPRINT(" %senvrecclosed", DUK_HOBJECT_HAS_ENVRECCLOSED(obj) ? str_empty : str_excl));
DUK_D(DUK_DPRINT(" %sexotic_array", DUK_HOBJECT_HAS_EXOTIC_ARRAY(obj) ? str_empty : str_excl));
DUK_D(DUK_DPRINT(" %sexotic_stringobj", DUK_HOBJECT_HAS_EXOTIC_STRINGOBJ(obj) ? str_empty : str_excl));
DUK_D(DUK_DPRINT(" %sexotic_arguments", DUK_HOBJECT_HAS_EXOTIC_ARGUMENTS(obj) ? str_empty : str_excl));
DUK_D(DUK_DPRINT(" %sexotic_dukfunc", DUK_HOBJECT_HAS_EXOTIC_DUKFUNC(obj) ? str_empty : str_excl));
DUK_D(DUK_DPRINT(" %sexotic_bufferobj", DUK_HOBJECT_HAS_EXOTIC_BUFFEROBJ(obj) ? str_empty : str_excl));
DUK_D(DUK_DPRINT(" %sexotic_proxyobj", DUK_HOBJECT_HAS_EXOTIC_PROXYOBJ(obj) ? str_empty : str_excl));
DUK_D(DUK_DPRINT(" class: number %d -> %s",
(int) DUK_HOBJECT_GET_CLASS_NUMBER(obj),
duk__class_names[(DUK_HOBJECT_GET_CLASS_NUMBER(obj)) & ((1 << DUK_HOBJECT_FLAG_CLASS_BITS) - 1)]));
DUK_D(DUK_DPRINT(" prototype: %p -> %!O",
(void *) obj->prototype,
(duk_heaphdr *) obj->prototype));
DUK_D(DUK_DPRINT(" props: p=%p, e_size=%d, e_used=%d, a_size=%d, h_size=%d",
(void *) obj->p,
(int) obj->e_size,
(int) obj->e_used,
(int) obj->a_size,
(int) obj->h_size));
/*
* Object (struct layout) specific dumping. Inline code here
* instead of helpers, to ensure debug line prefix is identical.
*/
if (DUK_HOBJECT_IS_COMPILEDFUNCTION(obj)) {
duk_hcompiledfunction *h = (duk_hcompiledfunction *) obj;
DUK_D(DUK_DPRINT(" hcompiledfunction"));
DUK_D(DUK_DPRINT(" data: %!O", h->data));
DUK_D(DUK_DPRINT(" nregs: %d", (int) h->nregs));
DUK_D(DUK_DPRINT(" nargs: %d", (int) h->nargs));
if (h->data && DUK_HBUFFER_HAS_DYNAMIC(h->data) && DUK_HBUFFER_GET_DATA_PTR(h->data)) {
DUK_D(DUK_DPRINT(" consts: %p (%d, %d bytes)",
(void *) DUK_HCOMPILEDFUNCTION_GET_CONSTS_BASE(h),
(int) DUK_HCOMPILEDFUNCTION_GET_CONSTS_COUNT(h),
(int) DUK_HCOMPILEDFUNCTION_GET_CONSTS_SIZE(h)));
DUK_D(DUK_DPRINT(" funcs: %p (%d, %d bytes)",
(void *) DUK_HCOMPILEDFUNCTION_GET_FUNCS_BASE(h),
(int) DUK_HCOMPILEDFUNCTION_GET_FUNCS_COUNT(h),
(int) DUK_HCOMPILEDFUNCTION_GET_FUNCS_SIZE(h)));
DUK_D(DUK_DPRINT(" bytecode: %p (%d, %d bytes)",
(void *) DUK_HCOMPILEDFUNCTION_GET_CODE_BASE(h),
(int) DUK_HCOMPILEDFUNCTION_GET_CODE_COUNT(h),
(int) DUK_HCOMPILEDFUNCTION_GET_CODE_SIZE(h)));
} else {
DUK_D(DUK_DPRINT(" consts: ???"));
DUK_D(DUK_DPRINT(" funcs: ???"));
DUK_D(DUK_DPRINT(" bytecode: ???"));
}
} else if (DUK_HOBJECT_IS_NATIVEFUNCTION(obj)) {
duk_hnativefunction *h = (duk_hnativefunction *) obj;
DUK_D(DUK_DPRINT(" hnativefunction"));
/* XXX: h->func, cannot print function pointers portably */
DUK_D(DUK_DPRINT(" nargs: %d", (int) h->nargs));
} else if (DUK_HOBJECT_IS_THREAD(obj)) {
duk_hthread *thr = (duk_hthread *) obj;
duk_tval *p;
DUK_D(DUK_DPRINT(" hthread"));
DUK_D(DUK_DPRINT(" strict: %d", (int) thr->strict));
DUK_D(DUK_DPRINT(" state: %d", (int) thr->state));
DUK_D(DUK_DPRINT(" valstack_max: %d, callstack_max:%d, catchstack_max: %d",
thr->valstack_max, thr->callstack_max, thr->catchstack_max));
DUK_D(DUK_DPRINT(" callstack: ptr %p, size %d, top %d, preventcount %d, used size %d entries (%d bytes), alloc size %d entries (%d bytes)",
(void *) thr->callstack,
thr->callstack_size,
thr->callstack_top,
thr->callstack_preventcount,
thr->callstack_top,
thr->callstack_top * sizeof(duk_activation),
thr->callstack_size,
thr->callstack_size * sizeof(duk_activation)));
DUK_DEBUG_SUMMARY_INIT();
DUK_DEBUG_SUMMARY_CHAR('[');
for (i = 0; i <= thr->callstack_size; i++) {
if (i == thr->callstack_top) {
DUK_DEBUG_SUMMARY_CHAR('|');
}
if (!thr->callstack) {
DUK_DEBUG_SUMMARY_CHAR('@');
} else if (i < thr->callstack_size) {
if (i < thr->callstack_top) {
/* tailcalling is nice to see immediately; other flags (e.g. strict)
* not that important.
*/
if (thr->callstack[i].flags & DUK_ACT_FLAG_TAILCALLED) {
DUK_DEBUG_SUMMARY_CHAR('/');
}
DUK_DEBUG_SUMMARY_CHAR(duk__get_act_summary_char(&thr->callstack[i]));
} else {
DUK_DEBUG_SUMMARY_CHAR('.');
}
}
}
DUK_DEBUG_SUMMARY_CHAR(']');
DUK_DEBUG_SUMMARY_FINISH();
DUK_D(DUK_DPRINT(" valstack: ptr %p, end %p (%d), bottom %p (%d), top %p (%d), used size %d entries (%d bytes), alloc size %d entries (%d bytes)",
(void *) thr->valstack,
(void *) thr->valstack_end,
(int) (thr->valstack_end - thr->valstack),
(void *) thr->valstack_bottom,
(int) (thr->valstack_bottom - thr->valstack),
(void *) thr->valstack_top,
(int) (thr->valstack_top - thr->valstack),
(int) (thr->valstack_top - thr->valstack),
(int) (thr->valstack_top - thr->valstack) * sizeof(duk_tval),
(int) (thr->valstack_end - thr->valstack),
(int) (thr->valstack_end - thr->valstack) * sizeof(duk_tval)));
DUK_DEBUG_SUMMARY_INIT();
DUK_DEBUG_SUMMARY_CHAR('[');
p = thr->valstack;
while (p <= thr->valstack_end) {
i = (duk_uint_fast32_t) (p - thr->valstack);
if (thr->callstack &&
thr->callstack_top > 0 &&
i == (duk_size_t) (thr->callstack + thr->callstack_top - 1)->idx_bottom) {
DUK_DEBUG_SUMMARY_CHAR('>');
}
if (p == thr->valstack_top) {
DUK_DEBUG_SUMMARY_CHAR('|');
}
if (p < thr->valstack_end) {
if (p < thr->valstack_top) {
DUK_DEBUG_SUMMARY_CHAR(duk__get_tval_summary_char(p));
} else {
/* XXX: safe printer for these? would be nice, because
* we could visualize whether the values are in proper
* state.
*/
DUK_DEBUG_SUMMARY_CHAR('.');
}
}
p++;
}
DUK_DEBUG_SUMMARY_CHAR(']');
DUK_DEBUG_SUMMARY_FINISH();
DUK_D(DUK_DPRINT(" catchstack: ptr %p, size %d, top %d, used size %d entries (%d bytes), alloc size %d entries (%d bytes)",
(void *) thr->catchstack,
thr->catchstack_size,
thr->catchstack_top,
thr->catchstack_top,
thr->catchstack_top * sizeof(duk_catcher),
thr->catchstack_size,
thr->catchstack_size * sizeof(duk_catcher)));
DUK_DEBUG_SUMMARY_INIT();
DUK_DEBUG_SUMMARY_CHAR('[');
for (i = 0; i <= thr->catchstack_size; i++) {
if (i == thr->catchstack_top) {
DUK_DEBUG_SUMMARY_CHAR('|');
}
if (!thr->catchstack) {
DUK_DEBUG_SUMMARY_CHAR('@');
} else if (i < thr->catchstack_size) {
if (i < thr->catchstack_top) {
DUK_DEBUG_SUMMARY_CHAR(duk__get_cat_summary_char(&thr->catchstack[i]));
} else {
DUK_DEBUG_SUMMARY_CHAR('.');
}
}
}
DUK_DEBUG_SUMMARY_CHAR(']');
DUK_DEBUG_SUMMARY_FINISH();
DUK_D(DUK_DPRINT(" resumer: ptr %p",
(void *) thr->resumer));
#if 0 /* worth dumping? */
for (i = 0; i < DUK_NUM_BUILTINS; i++) {
DUK_D(DUK_DPRINT(" builtins[%d] -> %!@O", i, thr->builtins[i]));
}
#endif
}
if (obj->p) {
DUK_D(DUK_DPRINT(" props alloc size: %d",
(int) DUK_HOBJECT_P_COMPUTE_SIZE(obj->e_size, obj->a_size, obj->h_size)));
} else {
DUK_D(DUK_DPRINT(" props alloc size: n/a"));
}
DUK_D(DUK_DPRINT(" prop entries:"));
for (i = 0; i < obj->e_size; i++) {
duk_hstring *k;
duk_propvalue *v;
k = DUK_HOBJECT_E_GET_KEY(obj, i);
v = DUK_HOBJECT_E_GET_VALUE_PTR(obj, i);
if (i >= obj->e_used) {
DUK_D(DUK_DPRINT(" [%d]: UNUSED", i));
continue;
}
if (!k) {
DUK_D(DUK_DPRINT(" [%d]: NULL", i));
continue;
}
if (DUK_HOBJECT_E_SLOT_IS_ACCESSOR(obj, i)) {
DUK_D(DUK_DPRINT(" [%d]: [w=%d e=%d c=%d a=%d] %!O -> get:%p set:%p; get %!O; set %!O",
i,
DUK_HOBJECT_E_SLOT_IS_WRITABLE(obj, i),
DUK_HOBJECT_E_SLOT_IS_ENUMERABLE(obj, i),
DUK_HOBJECT_E_SLOT_IS_CONFIGURABLE(obj, i),
DUK_HOBJECT_E_SLOT_IS_ACCESSOR(obj, i),
k,
(void *) v->a.get,
(void *) v->a.set,
(duk_heaphdr *) v->a.get,
(duk_heaphdr *) v->a.set));
} else {
DUK_D(DUK_DPRINT(" [%d]: [w=%d e=%d c=%d a=%d] %!O -> %!T",
i,
DUK_HOBJECT_E_SLOT_IS_WRITABLE(obj, i),
DUK_HOBJECT_E_SLOT_IS_ENUMERABLE(obj, i),
DUK_HOBJECT_E_SLOT_IS_CONFIGURABLE(obj, i),
DUK_HOBJECT_E_SLOT_IS_ACCESSOR(obj, i),
k,
&v->v));
}
}
DUK_D(DUK_DPRINT(" array entries:"));
for (i = 0; i < obj->a_size; i++) {
DUK_D(DUK_DPRINT(" [%d]: [w=%d e=%d c=%d a=%d] %d -> %!T",
i,
1, /* implicit attributes */
1,
1,
0,
i,
DUK_HOBJECT_A_GET_VALUE_PTR(obj, i)));
}
DUK_D(DUK_DPRINT(" hash entries:"));
for (i = 0; i < obj->h_size; i++) {
duk_uint32_t t = DUK_HOBJECT_H_GET_INDEX(obj, i);
if (t == DUK_HOBJECT_HASHIDX_UNUSED) {
DUK_D(DUK_DPRINT(" [%d]: unused", i));
} else if (t == DUK_HOBJECT_HASHIDX_DELETED) {
DUK_D(DUK_DPRINT(" [%d]: deleted", i));
} else {
DUK_D(DUK_DPRINT(" [%d]: %d",
i,
(int) t));
}
}
}
void duk_err_augment_error(duk_hthread *thr, duk_hthread *thr_callstack, int err_index, const char *filename, int line, int noblame_fileline) {
duk_context *ctx = (duk_context *) thr;
duk_hobject *obj;
DUK_ASSERT(thr != NULL);
DUK_ASSERT(thr_callstack != NULL);
DUK_ASSERT(ctx != NULL);
err_index = duk_require_normalize_index(ctx, err_index);
/*
* Criteria for augmenting:
*
* - augmentation enabled in build (naturally)
* - error value is an extensible object
* - error value internal prototype chain contains the built-in
* Error prototype object (i.e. 'val instanceof Error')
*/
obj = duk_require_hobject(ctx, err_index);
if (!obj) {
DUK_DDDPRINT("error value not an object, not augmented");
return;
}
if (!DUK_HOBJECT_HAS_EXTENSIBLE(obj)) {
DUK_DDDPRINT("error value not extensible, not augmented");
return;
}
if (!duk_hobject_prototype_chain_contains(thr, obj, thr->builtins[DUK_BIDX_ERROR_PROTOTYPE])) {
DUK_DDDPRINT("error value not inherited from Error, not augmented");
return;
}
/* Yes, augment error. */
#ifdef DUK_USE_TRACEBACKS
/*
* If tracebacks are enabled, the 'tracedata' property is the only
* thing we need: 'fileName' and 'lineNumber' are virtual properties
* which use 'tracedata'.
*/
if (duk_hobject_hasprop_raw(thr, obj, DUK_HTHREAD_STRING_TRACEDATA(thr))) {
DUK_DDDPRINT("error value already has a 'traceback' property, not modifying it");
} else {
add_traceback(thr, thr_callstack, obj, err_index, filename, line, noblame_fileline);
}
#else
/*
* If tracebacks are disabled, 'fileName' and 'lineNumber' are added
* as plain own properties. Since Error.prototype has accessors of
* the same name, we need to define own properties directly (cannot
* just use e.g. duk_put_prop_stridx). Existing properties are not
* overwritten in case they already exist.
*/
if (filename && !noblame_fileline) {
/* FIXME: file/line is disabled in minimal builds, so disable this too
* when appropriate.
*/
duk_push_string(ctx, filename);
duk_def_prop_stridx(ctx, err_index, DUK_STRIDX_FILE_NAME, DUK_PROPDESC_FLAGS_WC | DUK_PROPDESC_FLAG_NO_OVERWRITE);
duk_push_int(ctx, line);
duk_def_prop_stridx(ctx, err_index, DUK_STRIDX_LINE_NUMBER, DUK_PROPDESC_FLAGS_WC | DUK_PROPDESC_FLAG_NO_OVERWRITE);
} else if (thr_callstack->callstack_top > 0) {
duk_activation *act;
duk_hobject *func;
duk_hbuffer *pc2line;
act = thr_callstack->callstack + thr_callstack->callstack_top - 1;
DUK_ASSERT(act >= thr_callstack->callstack && act < thr_callstack->callstack + thr_callstack->callstack_size);
func = act->func;
if (func) {
int pc;
duk_uint32_t line;
/* PC points to next instruction, find offending PC. Note that
* PC == 0 for native code.
*/
pc = act->pc;
if (pc > 0) {
pc--;
}
DUK_ASSERT(pc >= 0 && (double) pc < DUK_DOUBLE_2TO32); /* assume PC is at most 32 bits and non-negative */
act = NULL; /* invalidated by pushes, so get out of the way */
duk_push_hobject(ctx, func);
duk_get_prop_stridx(ctx, -1, DUK_STRIDX_FILE_NAME);
duk_def_prop_stridx(ctx, err_index, DUK_STRIDX_FILE_NAME, DUK_PROPDESC_FLAGS_WC | DUK_PROPDESC_FLAG_NO_OVERWRITE);
if (DUK_HOBJECT_IS_COMPILEDFUNCTION(func)) {
#if 0
duk_push_number(ctx, pc);
duk_def_prop_stridx(ctx, err_index, DUK_STRIDX_PC, DUK_PROPDESC_FLAGS_WC | DUK_PROPDESC_FLAGS_NO_OVERWRITE);
#endif
duk_get_prop_stridx(ctx, -1, DUK_STRIDX_INT_PC2LINE);
if (duk_is_buffer(ctx, -1)) {
pc2line = duk_get_hbuffer(ctx, -1);
DUK_ASSERT(pc2line != NULL);
DUK_ASSERT(!DUK_HBUFFER_HAS_DYNAMIC(pc2line));
line = duk_hobject_pc2line_query((duk_hbuffer_fixed *) pc2line, (duk_uint_fast32_t) pc);
duk_push_number(ctx, (double) line); /* FIXME: u32 */
duk_def_prop_stridx(ctx, err_index, DUK_STRIDX_LINE_NUMBER, DUK_PROPDESC_FLAGS_WC | DUK_PROPDESC_FLAG_NO_OVERWRITE);
}
duk_pop(ctx);
} else {
/* Native function, no relevant lineNumber. */
}
duk_pop(ctx);
}
}
#endif /* DUK_USE_TRACEBACKS */
}
DUK_INTERNAL void duk_hthread_create_builtin_objects(duk_hthread *thr) {
duk_context *ctx = (duk_context *) thr;
duk_bitdecoder_ctx bd_ctx;
duk_bitdecoder_ctx *bd = &bd_ctx; /* convenience */
duk_hobject *h;
duk_small_uint_t i, j;
DUK_D(DUK_DPRINT("INITBUILTINS BEGIN"));
DUK_MEMZERO(&bd_ctx, sizeof(bd_ctx));
bd->data = (const duk_uint8_t *) duk_builtins_data;
bd->length = (duk_size_t) DUK_BUILTINS_DATA_LENGTH;
/*
* First create all built-in bare objects on the empty valstack.
* During init, their indices will correspond to built-in indices.
*
* Built-ins will be reachable from both valstack and thr->builtins.
*/
/* XXX: there is no need to resize valstack because builtin count
* is much less than the default space; assert for it.
*/
DUK_DD(DUK_DDPRINT("create empty built-ins"));
DUK_ASSERT_TOP(ctx, 0);
for (i = 0; i < DUK_NUM_BUILTINS; i++) {
duk_small_uint_t class_num;
duk_small_int_t len = -1; /* must be signed */
class_num = (duk_small_uint_t) duk_bd_decode(bd, DUK__CLASS_BITS);
len = (duk_small_int_t) duk_bd_decode_flagged(bd, DUK__LENGTH_PROP_BITS, (duk_int32_t) -1 /*def_value*/);
if (class_num == DUK_HOBJECT_CLASS_FUNCTION) {
duk_small_uint_t natidx;
duk_small_uint_t stridx;
duk_int_t c_nargs; /* must hold DUK_VARARGS */
duk_c_function c_func;
duk_int16_t magic;
DUK_DDD(DUK_DDDPRINT("len=%ld", (long) len));
DUK_ASSERT(len >= 0);
natidx = (duk_small_uint_t) duk_bd_decode(bd, DUK__NATIDX_BITS);
stridx = (duk_small_uint_t) duk_bd_decode(bd, DUK__STRIDX_BITS);
c_func = duk_bi_native_functions[natidx];
c_nargs = (duk_small_uint_t) duk_bd_decode_flagged(bd, DUK__NARGS_BITS, len /*def_value*/);
if (c_nargs == DUK__NARGS_VARARGS_MARKER) {
c_nargs = DUK_VARARGS;
}
/* XXX: set magic directly here? (it could share the c_nargs arg) */
duk_push_c_function_noexotic(ctx, c_func, c_nargs);
h = duk_require_hobject(ctx, -1);
DUK_ASSERT(h != NULL);
/* Currently all built-in native functions are strict.
* duk_push_c_function() now sets strict flag, so
* assert for it.
*/
DUK_ASSERT(DUK_HOBJECT_HAS_STRICT(h));
/* XXX: function properties */
duk_push_hstring_stridx(ctx, stridx);
duk_xdef_prop_stridx(ctx, -2, DUK_STRIDX_NAME, DUK_PROPDESC_FLAGS_NONE);
/* Almost all global level Function objects are constructable
* but not all: Function.prototype is a non-constructable,
* callable Function.
*/
if (duk_bd_decode_flag(bd)) {
DUK_ASSERT(DUK_HOBJECT_HAS_CONSTRUCTABLE(h));
} else {
DUK_HOBJECT_CLEAR_CONSTRUCTABLE(h);
}
/* Cast converts magic to 16-bit signed value */
magic = (duk_int16_t) duk_bd_decode_flagged(bd, DUK__MAGIC_BITS, 0 /*def_value*/);
((duk_hnativefunction *) h)->magic = magic;
} else {
/* XXX: ARRAY_PART for Array prototype? */
duk_push_object_helper(ctx,
DUK_HOBJECT_FLAG_EXTENSIBLE,
-1); /* no prototype or class yet */
h = duk_require_hobject(ctx, -1);
DUK_ASSERT(h != NULL);
}
DUK_HOBJECT_SET_CLASS_NUMBER(h, class_num);
thr->builtins[i] = h;
DUK_HOBJECT_INCREF(thr, &h->hdr);
if (len >= 0) {
/*
* For top-level objects, 'length' property has the following
* default attributes: non-writable, non-enumerable, non-configurable
* (E5 Section 15).
*
* However, 'length' property for Array.prototype has attributes
* expected of an Array instance which are different: writable,
* non-enumerable, non-configurable (E5 Section 15.4.5.2).
*
* This is currently determined implicitly based on class; there are
* no attribute flags in the init data.
*/
duk_push_int(ctx, len);
duk_xdef_prop_stridx(ctx,
-2,
DUK_STRIDX_LENGTH,
(class_num == DUK_HOBJECT_CLASS_ARRAY ? /* only Array.prototype matches */
DUK_PROPDESC_FLAGS_W : DUK_PROPDESC_FLAGS_NONE));
}
/* enable exotic behaviors last */
if (class_num == DUK_HOBJECT_CLASS_ARRAY) {
DUK_HOBJECT_SET_EXOTIC_ARRAY(h);
}
if (class_num == DUK_HOBJECT_CLASS_STRING) {
DUK_HOBJECT_SET_EXOTIC_STRINGOBJ(h);
}
/* some assertions */
DUK_ASSERT(DUK_HOBJECT_HAS_EXTENSIBLE(h));
/* DUK_HOBJECT_FLAG_CONSTRUCTABLE varies */
DUK_ASSERT(!DUK_HOBJECT_HAS_BOUND(h));
DUK_ASSERT(!DUK_HOBJECT_HAS_COMPILEDFUNCTION(h));
/* DUK_HOBJECT_FLAG_NATIVEFUNCTION varies */
DUK_ASSERT(!DUK_HOBJECT_HAS_THREAD(h));
DUK_ASSERT(!DUK_HOBJECT_HAS_ARRAY_PART(h)); /* currently, even for Array.prototype */
/* DUK_HOBJECT_FLAG_STRICT varies */
DUK_ASSERT(!DUK_HOBJECT_HAS_NATIVEFUNCTION(h) || /* all native functions have NEWENV */
DUK_HOBJECT_HAS_NEWENV(h));
DUK_ASSERT(!DUK_HOBJECT_HAS_NAMEBINDING(h));
DUK_ASSERT(!DUK_HOBJECT_HAS_CREATEARGS(h));
DUK_ASSERT(!DUK_HOBJECT_HAS_ENVRECCLOSED(h));
/* DUK_HOBJECT_FLAG_EXOTIC_ARRAY varies */
/* DUK_HOBJECT_FLAG_EXOTIC_STRINGOBJ varies */
DUK_ASSERT(!DUK_HOBJECT_HAS_EXOTIC_ARGUMENTS(h));
DUK_DDD(DUK_DDDPRINT("created built-in %ld, class=%ld, length=%ld", (long) i, (long) class_num, (long) len));
}
/*
* Then decode the builtins init data (see genbuiltins.py) to
* init objects
*/
DUK_DD(DUK_DDPRINT("initialize built-in object properties"));
for (i = 0; i < DUK_NUM_BUILTINS; i++) {
duk_small_uint_t t;
duk_small_uint_t num;
DUK_DDD(DUK_DDDPRINT("initializing built-in object at index %ld", (long) i));
h = thr->builtins[i];
t = (duk_small_uint_t) duk_bd_decode(bd, DUK__BIDX_BITS);
if (t != DUK__NO_BIDX_MARKER) {
DUK_DDD(DUK_DDDPRINT("set internal prototype: built-in %ld", (long) t));
DUK_HOBJECT_SET_PROTOTYPE_UPDREF(thr, h, thr->builtins[t]);
}
t = (duk_small_uint_t) duk_bd_decode(bd, DUK__BIDX_BITS);
if (t != DUK__NO_BIDX_MARKER) {
/* 'prototype' property for all built-in objects (which have it) has attributes:
* [[Writable]] = false,
* [[Enumerable]] = false,
* [[Configurable]] = false
*/
DUK_DDD(DUK_DDDPRINT("set external prototype: built-in %ld", (long) t));
duk_xdef_prop_stridx_builtin(ctx, i, DUK_STRIDX_PROTOTYPE, t, DUK_PROPDESC_FLAGS_NONE);
}
t = (duk_small_uint_t) duk_bd_decode(bd, DUK__BIDX_BITS);
if (t != DUK__NO_BIDX_MARKER) {
/* 'constructor' property for all built-in objects (which have it) has attributes:
* [[Writable]] = true,
* [[Enumerable]] = false,
* [[Configurable]] = true
*/
DUK_DDD(DUK_DDDPRINT("set external constructor: built-in %ld", (long) t));
duk_xdef_prop_stridx_builtin(ctx, i, DUK_STRIDX_CONSTRUCTOR, t, DUK_PROPDESC_FLAGS_WC);
}
/* normal valued properties */
num = (duk_small_uint_t) duk_bd_decode(bd, DUK__NUM_NORMAL_PROPS_BITS);
DUK_DDD(DUK_DDDPRINT("built-in object %ld, %ld normal valued properties", (long) i, (long) num));
for (j = 0; j < num; j++) {
duk_small_uint_t stridx;
duk_small_uint_t prop_flags;
stridx = (duk_small_uint_t) duk_bd_decode(bd, DUK__STRIDX_BITS);
/*
* Property attribute defaults are defined in E5 Section 15 (first
* few pages); there is a default for all properties and a special
* default for 'length' properties. Variation from the defaults is
* signaled using a single flag bit in the bitstream.
*/
if (duk_bd_decode_flag(bd)) {
prop_flags = (duk_small_uint_t) duk_bd_decode(bd, DUK__PROP_FLAGS_BITS);
} else {
if (stridx == DUK_STRIDX_LENGTH) {
prop_flags = DUK_PROPDESC_FLAGS_NONE;
} else {
prop_flags = DUK_PROPDESC_FLAGS_WC;
}
}
t = (duk_small_uint_t) duk_bd_decode(bd, DUK__PROP_TYPE_BITS);
DUK_DDD(DUK_DDDPRINT("built-in %ld, normal-valued property %ld, stridx %ld, flags 0x%02lx, type %ld",
(long) i, (long) j, (long) stridx, (unsigned long) prop_flags, (long) t));
switch (t) {
case DUK__PROP_TYPE_DOUBLE: {
duk_double_union du;
duk_small_uint_t k;
for (k = 0; k < 8; k++) {
/* Encoding endianness must match target memory layout,
* build scripts and genbuiltins.py must ensure this.
*/
du.uc[k] = (duk_uint8_t) duk_bd_decode(bd, 8);
}
duk_push_number(ctx, du.d); /* push operation normalizes NaNs */
break;
}
case DUK__PROP_TYPE_STRING: {
duk_small_uint_t n;
duk_small_uint_t k;
duk_uint8_t *p;
n = (duk_small_uint_t) duk_bd_decode(bd, DUK__STRING_LENGTH_BITS);
p = (duk_uint8_t *) duk_push_fixed_buffer(ctx, n);
for (k = 0; k < n; k++) {
*p++ = (duk_uint8_t) duk_bd_decode(bd, DUK__STRING_CHAR_BITS);
}
duk_to_string(ctx, -1);
break;
}
case DUK__PROP_TYPE_STRIDX: {
duk_small_uint_t n;
n = (duk_small_uint_t) duk_bd_decode(bd, DUK__STRIDX_BITS);
DUK_ASSERT_DISABLE(n >= 0); /* unsigned */
DUK_ASSERT(n < DUK_HEAP_NUM_STRINGS);
duk_push_hstring_stridx(ctx, n);
break;
}
case DUK__PROP_TYPE_BUILTIN: {
duk_small_uint_t bidx;
bidx = (duk_small_uint_t) duk_bd_decode(bd, DUK__BIDX_BITS);
DUK_ASSERT(bidx != DUK__NO_BIDX_MARKER);
duk_dup(ctx, (duk_idx_t) bidx);
break;
}
case DUK__PROP_TYPE_UNDEFINED: {
duk_push_undefined(ctx);
break;
}
case DUK__PROP_TYPE_BOOLEAN_TRUE: {
duk_push_true(ctx);
break;
}
case DUK__PROP_TYPE_BOOLEAN_FALSE: {
duk_push_false(ctx);
break;
}
case DUK__PROP_TYPE_ACCESSOR: {
duk_small_uint_t natidx_getter = (duk_small_uint_t) duk_bd_decode(bd, DUK__NATIDX_BITS);
duk_small_uint_t natidx_setter = (duk_small_uint_t) duk_bd_decode(bd, DUK__NATIDX_BITS);
duk_c_function c_func_getter;
duk_c_function c_func_setter;
/* XXX: this is a bit awkward because there is no exposed helper
* in the API style, only this internal helper.
*/
DUK_DDD(DUK_DDDPRINT("built-in accessor property: objidx=%ld, stridx=%ld, getteridx=%ld, setteridx=%ld, flags=0x%04lx",
(long) i, (long) stridx, (long) natidx_getter, (long) natidx_setter, (unsigned long) prop_flags));
c_func_getter = duk_bi_native_functions[natidx_getter];
c_func_setter = duk_bi_native_functions[natidx_setter];
duk_push_c_function_noconstruct_noexotic(ctx, c_func_getter, 0); /* always 0 args */
duk_push_c_function_noconstruct_noexotic(ctx, c_func_setter, 1); /* always 1 arg */
/* XXX: magic for getter/setter? */
prop_flags |= DUK_PROPDESC_FLAG_ACCESSOR; /* accessor flag not encoded explicitly */
duk_hobject_define_accessor_internal(thr,
duk_require_hobject(ctx, i),
DUK_HTHREAD_GET_STRING(thr, stridx),
duk_require_hobject(ctx, -2),
duk_require_hobject(ctx, -1),
prop_flags);
duk_pop_2(ctx); /* getter and setter, now reachable through object */
goto skip_value;
}
default: {
/* exhaustive */
DUK_UNREACHABLE();
}
}
DUK_ASSERT((prop_flags & DUK_PROPDESC_FLAG_ACCESSOR) == 0);
duk_xdef_prop_stridx(ctx, i, stridx, prop_flags);
skip_value:
continue; /* avoid empty label at the end of a compound statement */
}
/* native function properties */
num = (duk_small_uint_t) duk_bd_decode(bd, DUK__NUM_FUNC_PROPS_BITS);
DUK_DDD(DUK_DDDPRINT("built-in object %ld, %ld function valued properties", (long) i, (long) num));
for (j = 0; j < num; j++) {
duk_small_uint_t stridx;
duk_small_uint_t natidx;
duk_int_t c_nargs; /* must hold DUK_VARARGS */
duk_small_uint_t c_length;
duk_int16_t magic;
duk_c_function c_func;
duk_hnativefunction *h_func;
#if defined(DUK_USE_LIGHTFUNC_BUILTINS)
duk_small_int_t lightfunc_eligible;
#endif
stridx = (duk_small_uint_t) duk_bd_decode(bd, DUK__STRIDX_BITS);
natidx = (duk_small_uint_t) duk_bd_decode(bd, DUK__NATIDX_BITS);
c_length = (duk_small_uint_t) duk_bd_decode(bd, DUK__LENGTH_PROP_BITS);
c_nargs = (duk_int_t) duk_bd_decode_flagged(bd, DUK__NARGS_BITS, (duk_int32_t) c_length /*def_value*/);
if (c_nargs == DUK__NARGS_VARARGS_MARKER) {
c_nargs = DUK_VARARGS;
}
c_func = duk_bi_native_functions[natidx];
DUK_DDD(DUK_DDDPRINT("built-in %ld, function-valued property %ld, stridx %ld, natidx %ld, length %ld, nargs %ld",
(long) i, (long) j, (long) stridx, (long) natidx, (long) c_length,
(c_nargs == DUK_VARARGS ? (long) -1 : (long) c_nargs)));
/* Cast converts magic to 16-bit signed value */
magic = (duk_int16_t) duk_bd_decode_flagged(bd, DUK__MAGIC_BITS, 0);
#if defined(DUK_USE_LIGHTFUNC_BUILTINS)
lightfunc_eligible =
((c_nargs >= DUK_LFUNC_NARGS_MIN && c_nargs <= DUK_LFUNC_NARGS_MAX) || (c_nargs == DUK_VARARGS)) &&
(c_length <= DUK_LFUNC_LENGTH_MAX) &&
(magic >= DUK_LFUNC_MAGIC_MIN && magic <= DUK_LFUNC_MAGIC_MAX);
if (stridx == DUK_STRIDX_EVAL ||
stridx == DUK_STRIDX_YIELD ||
stridx == DUK_STRIDX_RESUME ||
stridx == DUK_STRIDX_REQUIRE) {
/* These functions have trouble working as lightfuncs.
* Some of them have specific asserts and some may have
* additional properties (e.g. 'require.id' may be written).
*/
DUK_D(DUK_DPRINT("reject as lightfunc: stridx=%d, i=%d, j=%d", (int) stridx, (int) i, (int) j));
lightfunc_eligible = 0;
}
if (lightfunc_eligible) {
duk_tval tv_lfunc;
duk_small_uint_t lf_nargs = (c_nargs == DUK_VARARGS ? DUK_LFUNC_NARGS_VARARGS : c_nargs);
duk_small_uint_t lf_flags = DUK_LFUNC_FLAGS_PACK(magic, c_length, lf_nargs);
DUK_TVAL_SET_LIGHTFUNC(&tv_lfunc, c_func, lf_flags);
duk_push_tval(ctx, &tv_lfunc);
DUK_D(DUK_DPRINT("built-in function eligible as light function: i=%d, j=%d c_length=%ld, c_nargs=%ld, magic=%ld -> %!iT", (int) i, (int) j, (long) c_length, (long) c_nargs, (long) magic, duk_get_tval(ctx, -1)));
goto lightfunc_skip;
}
DUK_D(DUK_DPRINT("built-in function NOT ELIGIBLE as light function: i=%d, j=%d c_length=%ld, c_nargs=%ld, magic=%ld", (int) i, (int) j, (long) c_length, (long) c_nargs, (long) magic));
#endif /* DUK_USE_LIGHTFUNC_BUILTINS */
/* [ (builtin objects) ] */
duk_push_c_function_noconstruct_noexotic(ctx, c_func, c_nargs);
h_func = duk_require_hnativefunction(ctx, -1);
DUK_UNREF(h_func);
/* Currently all built-in native functions are strict.
* This doesn't matter for many functions, but e.g.
* String.prototype.charAt (and other string functions)
* rely on being strict so that their 'this' binding is
* not automatically coerced.
*/
DUK_HOBJECT_SET_STRICT((duk_hobject *) h_func);
/* No built-in functions are constructable except the top
* level ones (Number, etc).
*/
DUK_ASSERT(!DUK_HOBJECT_HAS_CONSTRUCTABLE((duk_hobject *) h_func));
/* XXX: any way to avoid decoding magic bit; there are quite
* many function properties and relatively few with magic values.
*/
h_func->magic = magic;
/* [ (builtin objects) func ] */
duk_push_int(ctx, c_length);
duk_xdef_prop_stridx(ctx, -2, DUK_STRIDX_LENGTH, DUK_PROPDESC_FLAGS_NONE);
duk_push_hstring_stridx(ctx, stridx);
duk_xdef_prop_stridx(ctx, -2, DUK_STRIDX_NAME, DUK_PROPDESC_FLAGS_NONE);
/* XXX: other properties of function instances; 'arguments', 'caller'. */
DUK_DD(DUK_DDPRINT("built-in object %ld, function property %ld -> %!T",
(long) i, (long) j, (duk_tval *) duk_get_tval(ctx, -1)));
/* [ (builtin objects) func ] */
/*
* The default property attributes are correct for all
* function valued properties of built-in objects now.
*/
#if defined(DUK_USE_LIGHTFUNC_BUILTINS)
lightfunc_skip:
#endif
duk_xdef_prop_stridx(ctx, i, stridx, DUK_PROPDESC_FLAGS_WC);
/* [ (builtin objects) ] */
}
}
/*
* Special post-tweaks, for cases not covered by the init data format.
*
* - Set Date.prototype.toGMTString to Date.prototype.toUTCString.
* toGMTString is required to have the same Function object as
* toUTCString in E5 Section B.2.6. Note that while Smjs respects
* this, V8 does not (the Function objects are distinct).
*
* - Make DoubleError non-extensible.
*
* - Add info about most important effective compile options to Duktape.
*
* - Possibly remove some properties (values or methods) which are not
* desirable with current feature options but are not currently
* conditional in init data.
*/
duk_get_prop_stridx(ctx, DUK_BIDX_DATE_PROTOTYPE, DUK_STRIDX_TO_UTC_STRING);
duk_xdef_prop_stridx(ctx, DUK_BIDX_DATE_PROTOTYPE, DUK_STRIDX_TO_GMT_STRING, DUK_PROPDESC_FLAGS_WC);
h = duk_require_hobject(ctx, DUK_BIDX_DOUBLE_ERROR);
DUK_ASSERT(h != NULL);
DUK_HOBJECT_CLEAR_EXTENSIBLE(h);
#if !defined(DUK_USE_ES6_OBJECT_PROTO_PROPERTY)
DUK_DD(DUK_DDPRINT("delete Object.prototype.__proto__ built-in which is not enabled in features"));
(void) duk_hobject_delprop_raw(thr, thr->builtins[DUK_BIDX_OBJECT_PROTOTYPE], DUK_HTHREAD_STRING___PROTO__(thr), DUK_DELPROP_FLAG_THROW);
#endif
#if !defined(DUK_USE_ES6_OBJECT_SETPROTOTYPEOF)
DUK_DD(DUK_DDPRINT("delete Object.setPrototypeOf built-in which is not enabled in features"));
(void) duk_hobject_delprop_raw(thr, thr->builtins[DUK_BIDX_OBJECT_CONSTRUCTOR], DUK_HTHREAD_STRING_SET_PROTOTYPE_OF(thr), DUK_DELPROP_FLAG_THROW);
#endif
duk_push_string(ctx,
/* Endianness indicator */
#if defined(DUK_USE_INTEGER_LE)
"l"
#elif defined(DUK_USE_INTEGER_BE)
"b"
#elif defined(DUK_USE_INTEGER_ME) /* integer mixed endian not really used now */
"m"
#else
"?"
#endif
#if defined(DUK_USE_DOUBLE_LE)
"l"
#elif defined(DUK_USE_DOUBLE_BE)
"b"
#elif defined(DUK_USE_DOUBLE_ME)
"m"
#else
"?"
#endif
#if defined(DUK_USE_BYTEORDER_FORCED)
"f"
#endif
" "
/* Packed or unpacked tval */
#if defined(DUK_USE_PACKED_TVAL)
"p"
#else
"u"
#endif
#if defined(DUK_USE_FASTINT)
"f"
#endif
" "
/* Low memory options */
#if defined(DUK_USE_STRTAB_CHAIN)
"c" /* chain */
#elif defined(DUK_USE_STRTAB_PROBE)
"p" /* probe */
#else
"?"
#endif
#if !defined(DUK_USE_HEAPPTR16) && !defined(DUK_DATAPTR16) && !defined(DUK_FUNCPTR16)
"n"
#endif
#if defined(DUK_USE_HEAPPTR16)
"h"
#endif
#if defined(DUK_USE_DATAPTR16)
"d"
#endif
#if defined(DUK_USE_FUNCPTR16)
"f"
#endif
#if defined(DUK_USE_REFCOUNT16)
"R"
#endif
#if defined(DUK_USE_STRHASH16)
"H"
#endif
#if defined(DUK_USE_STRLEN16)
"S"
#endif
#if defined(DUK_USE_BUFLEN16)
"B"
#endif
#if defined(DUK_USE_OBJSIZES16)
"O"
#endif
#if defined(DUK_USE_LIGHTFUNC_BUILTINS)
"L"
#endif
" "
/* Object property allocation layout */
#if defined(DUK_USE_HOBJECT_LAYOUT_1)
"p1"
#elif defined(DUK_USE_HOBJECT_LAYOUT_2)
"p2"
#elif defined(DUK_USE_HOBJECT_LAYOUT_3)
"p3"
#else
"p?"
#endif
" "
/* Alignment guarantee */
#if defined(DUK_USE_ALIGN_4)
"a4"
#elif defined(DUK_USE_ALIGN_8)
"a8"
#else
"a1"
#endif
" "
/* Architecture, OS, and compiler strings */
DUK_USE_ARCH_STRING
" "
DUK_USE_OS_STRING
" "
DUK_USE_COMPILER_STRING);
duk_xdef_prop_stridx(ctx, DUK_BIDX_DUKTAPE, DUK_STRIDX_ENV, DUK_PROPDESC_FLAGS_WC);
/*
* InitJS code - Ecmascript code evaluated from a built-in source
* which provides e.g. backward compatibility. User can also provide
* JS code to be evaluated at startup.
*/
#ifdef DUK_USE_BUILTIN_INITJS
/* XXX: compression */
DUK_DD(DUK_DDPRINT("running built-in initjs"));
duk_eval_string(ctx, (const char *) duk_initjs_data); /* initjs data is NUL terminated */
duk_pop(ctx);
#endif /* DUK_USE_BUILTIN_INITJS */
#ifdef DUK_USE_USER_INITJS
/* XXX: compression (as an option) */
DUK_DD(DUK_DDPRINT("running user initjs"));
duk_eval_string_noresult(ctx, (const char *) DUK_USE_USER_INITJS);
#endif /* DUK_USE_USER_INITJS */
/*
* Since built-ins are not often extended, compact them.
*/
DUK_DD(DUK_DDPRINT("compact built-ins"));
for (i = 0; i < DUK_NUM_BUILTINS; i++) {
duk_hobject_compact_props(thr, thr->builtins[i]);
}
DUK_D(DUK_DPRINT("INITBUILTINS END"));
#ifdef DUK_USE_DDPRINT
for (i = 0; i < DUK_NUM_BUILTINS; i++) {
DUK_DD(DUK_DDPRINT("built-in object %ld after initialization and compacting: %!@iO",
(long) i, (duk_heaphdr *) thr->builtins[i]));
}
#endif
/*
* Pop built-ins from stack: they are now INCREF'd and
* reachable from the builtins[] array.
*/
duk_pop_n(ctx, DUK_NUM_BUILTINS);
DUK_ASSERT_TOP(ctx, 0);
}
void duk_hthread_create_builtin_objects(duk_hthread *thr) {
duk_context *ctx = (duk_context *) thr;
duk_bitdecoder_ctx bd_ctx;
duk_bitdecoder_ctx *bd = &bd_ctx; /* convenience */
duk_hobject *h;
int i, j;
DUK_DPRINT("INITBUILTINS BEGIN");
DUK_MEMZERO(&bd_ctx, sizeof(bd_ctx));
bd->data = (const duk_uint8_t *) duk_builtins_data;
bd->length = (duk_size_t) DUK_BUILTINS_DATA_LENGTH;
/*
* First create all built-in bare objects on the empty valstack.
* During init, their indices will correspond to built-in indices.
*
* Built-ins will be reachable from both valstack and thr->builtins.
*/
/* XXX: there is no need to resize valstack because builtin count
* is much less than the default space; assert for it.
*/
DUK_DDPRINT("create empty built-ins");
DUK_ASSERT_TOP(ctx, 0);
for (i = 0; i < DUK_NUM_BUILTINS; i++) {
int class_num;
int len = -1;
class_num = duk_bd_decode(bd, DUK__CLASS_BITS);
len = duk_bd_decode_flagged(bd, DUK__LENGTH_PROP_BITS, (duk_int32_t) -1 /*def_value*/);
if (class_num == DUK_HOBJECT_CLASS_FUNCTION) {
int natidx;
int stridx;
int c_nargs;
duk_c_function c_func;
duk_int16_t magic;
DUK_DDDPRINT("len=%d", len);
DUK_ASSERT(len >= 0);
natidx = duk_bd_decode(bd, DUK__NATIDX_BITS);
stridx = duk_bd_decode(bd, DUK__STRIDX_BITS);
c_func = duk_bi_native_functions[natidx];
c_nargs = duk_bd_decode_flagged(bd, DUK__NARGS_BITS, len /*def_value*/);
if (c_nargs == DUK__NARGS_VARARGS_MARKER) {
c_nargs = DUK_VARARGS;
}
/* FIXME: set magic directly here? (it could share the c_nargs arg) */
duk_push_c_function_nospecial(ctx, c_func, c_nargs);
h = duk_require_hobject(ctx, -1);
DUK_ASSERT(h != NULL);
/* Currently all built-in native functions are strict.
* duk_push_c_function() now sets strict flag, so
* assert for it.
*/
DUK_ASSERT(DUK_HOBJECT_HAS_STRICT(h));
/* FIXME: function properties */
duk_push_hstring_stridx(ctx, stridx);
duk_def_prop_stridx(ctx, -2, DUK_STRIDX_NAME, DUK_PROPDESC_FLAGS_NONE);
/* Almost all global level Function objects are constructable
* but not all: Function.prototype is a non-constructable,
* callable Function.
*/
if (duk_bd_decode_flag(bd)) {
DUK_ASSERT(DUK_HOBJECT_HAS_CONSTRUCTABLE(h));
} else {
DUK_HOBJECT_CLEAR_CONSTRUCTABLE(h);
}
/* Cast converts magic to 16-bit signed value */
magic = (duk_int16_t) duk_bd_decode_flagged(bd, DUK__MAGIC_BITS, 0 /*def_value*/);
((duk_hnativefunction *) h)->magic = magic;
} else {
/* FIXME: ARRAY_PART for Array prototype? */
duk_push_object_helper(ctx,
DUK_HOBJECT_FLAG_EXTENSIBLE,
-1); /* no prototype or class yet */
h = duk_require_hobject(ctx, -1);
DUK_ASSERT(h != NULL);
}
DUK_HOBJECT_SET_CLASS_NUMBER(h, class_num);
thr->builtins[i] = h;
DUK_HOBJECT_INCREF(thr, &h->hdr);
if (len >= 0) {
/*
* For top-level objects, 'length' property has the following
* default attributes: non-writable, non-enumerable, non-configurable
* (E5 Section 15).
*
* However, 'length' property for Array.prototype has attributes
* expected of an Array instance which are different: writable,
* non-enumerable, non-configurable (E5 Section 15.4.5.2).
*
* This is currently determined implicitly based on class; there are
* no attribute flags in the init data.
*/
duk_push_int(ctx, len);
duk_def_prop_stridx(ctx,
-2,
DUK_STRIDX_LENGTH,
(class_num == DUK_HOBJECT_CLASS_ARRAY ? /* only Array.prototype matches */
DUK_PROPDESC_FLAGS_W : DUK_PROPDESC_FLAGS_NONE));
}
/* enable special behaviors last */
if (class_num == DUK_HOBJECT_CLASS_ARRAY) {
DUK_HOBJECT_SET_SPECIAL_ARRAY(h);
}
if (class_num == DUK_HOBJECT_CLASS_STRING) {
DUK_HOBJECT_SET_SPECIAL_STRINGOBJ(h);
}
/* some assertions */
DUK_ASSERT(DUK_HOBJECT_HAS_EXTENSIBLE(h));
/* DUK_HOBJECT_FLAG_CONSTRUCTABLE varies */
DUK_ASSERT(!DUK_HOBJECT_HAS_BOUND(h));
DUK_ASSERT(!DUK_HOBJECT_HAS_COMPILEDFUNCTION(h));
/* DUK_HOBJECT_FLAG_NATIVEFUNCTION varies */
DUK_ASSERT(!DUK_HOBJECT_HAS_THREAD(h));
DUK_ASSERT(!DUK_HOBJECT_HAS_ARRAY_PART(h)); /* currently, even for Array.prototype */
/* DUK_HOBJECT_FLAG_STRICT varies */
DUK_ASSERT(!DUK_HOBJECT_HAS_NATIVEFUNCTION(h) || /* all native functions have NEWENV */
DUK_HOBJECT_HAS_NEWENV(h));
DUK_ASSERT(!DUK_HOBJECT_HAS_NAMEBINDING(h));
DUK_ASSERT(!DUK_HOBJECT_HAS_CREATEARGS(h));
DUK_ASSERT(!DUK_HOBJECT_HAS_ENVRECCLOSED(h));
/* DUK_HOBJECT_FLAG_SPECIAL_ARRAY varies */
/* DUK_HOBJECT_FLAG_SPECIAL_STRINGOBJ varies */
DUK_ASSERT(!DUK_HOBJECT_HAS_SPECIAL_ARGUMENTS(h));
DUK_DDDPRINT("created built-in %d, class=%d, length=%d", i, class_num, len);
}
/*
* Then decode the builtins init data (see genbuiltins.py) to
* init objects
*/
DUK_DDPRINT("initialize built-in object properties");
for (i = 0; i < DUK_NUM_BUILTINS; i++) {
unsigned char t;
int num;
DUK_DDDPRINT("initializing built-in object at index %d", i);
h = thr->builtins[i];
t = duk_bd_decode(bd, DUK__BIDX_BITS);
if (t != DUK__NO_BIDX_MARKER) {
DUK_DDDPRINT("set internal prototype: built-in %d", (int) t);
DUK_HOBJECT_SET_PROTOTYPE_UPDREF(thr, h, thr->builtins[t]);
}
t = duk_bd_decode(bd, DUK__BIDX_BITS);
if (t != DUK__NO_BIDX_MARKER) {
/* 'prototype' property for all built-in objects (which have it) has attributes:
* [[Writable]] = false,
* [[Enumerable]] = false,
* [[Configurable]] = false
*/
DUK_DDDPRINT("set external prototype: built-in %d", (int) t);
duk_def_prop_stridx_builtin(ctx, i, DUK_STRIDX_PROTOTYPE, t, DUK_PROPDESC_FLAGS_NONE);
}
t = duk_bd_decode(bd, DUK__BIDX_BITS);
if (t != DUK__NO_BIDX_MARKER) {
/* 'constructor' property for all built-in objects (which have it) has attributes:
* [[Writable]] = true,
* [[Enumerable]] = false,
* [[Configurable]] = true
*/
DUK_DDDPRINT("set external constructor: built-in %d", (int) t);
duk_def_prop_stridx_builtin(ctx, i, DUK_STRIDX_CONSTRUCTOR, t, DUK_PROPDESC_FLAGS_WC);
}
/* normal valued properties */
num = duk_bd_decode(bd, DUK__NUM_NORMAL_PROPS_BITS);
DUK_DDDPRINT("built-in object %d, %d normal valued properties", i, num);
for (j = 0; j < num; j++) {
int stridx;
int prop_flags;
stridx = duk_bd_decode(bd, DUK__STRIDX_BITS);
/*
* Property attribute defaults are defined in E5 Section 15 (first
* few pages); there is a default for all properties and a special
* default for 'length' properties. Variation from the defaults is
* signaled using a single flag bit in the bitstream.
*/
if (duk_bd_decode_flag(bd)) {
prop_flags = duk_bd_decode(bd, DUK__PROP_FLAGS_BITS);
} else {
if (stridx == DUK_STRIDX_LENGTH) {
prop_flags = DUK_PROPDESC_FLAGS_NONE;
} else {
prop_flags = DUK_PROPDESC_FLAGS_WC;
}
}
t = duk_bd_decode(bd, DUK__PROP_TYPE_BITS);
DUK_DDDPRINT("built-in %d, normal-valued property %d, stridx %d, flags 0x%02x, type %d",
i, j, stridx, prop_flags, (int) t);
switch (t) {
case DUK__PROP_TYPE_DOUBLE: {
duk_double_union du;
int k;
for (k = 0; k < 8; k++) {
/* Encoding endianness must match target memory layout,
* build scripts and genbuiltins.py must ensure this.
*/
du.uc[k] = (duk_uint8_t) duk_bd_decode(bd, 8);
}
duk_push_number(ctx, du.d); /* push operation normalizes NaNs */
break;
}
case DUK__PROP_TYPE_STRING: {
int n;
int k;
char *p;
n = duk_bd_decode(bd, DUK__STRING_LENGTH_BITS);
p = (char *) duk_push_fixed_buffer(ctx, n);
for (k = 0; k < n; k++) {
*p++ = duk_bd_decode(bd, DUK__STRING_CHAR_BITS);
}
duk_to_string(ctx, -1);
break;
}
case DUK__PROP_TYPE_STRIDX: {
int n;
n = duk_bd_decode(bd, DUK__STRIDX_BITS);
DUK_ASSERT(n >= 0 && n < DUK_HEAP_NUM_STRINGS);
duk_push_hstring_stridx(ctx, n);
break;
}
case DUK__PROP_TYPE_BUILTIN: {
int bidx;
bidx = duk_bd_decode(bd, DUK__BIDX_BITS);
DUK_ASSERT(bidx != DUK__NO_BIDX_MARKER);
duk_dup(ctx, bidx);
break;
}
case DUK__PROP_TYPE_UNDEFINED: {
duk_push_undefined(ctx);
break;
}
case DUK__PROP_TYPE_BOOLEAN_TRUE: {
duk_push_true(ctx);
break;
}
case DUK__PROP_TYPE_BOOLEAN_FALSE: {
duk_push_false(ctx);
break;
}
case DUK__PROP_TYPE_ACCESSOR: {
int natidx_getter = duk_bd_decode(bd, DUK__NATIDX_BITS);
int natidx_setter = duk_bd_decode(bd, DUK__NATIDX_BITS);
duk_c_function c_func_getter;
duk_c_function c_func_setter;
/* XXX: this is a bit awkward because there is no exposed helper
* in the API style, only this internal helper.
*/
DUK_DDDPRINT("built-in accessor property: objidx=%d, stridx=%d, getteridx=%d, setteridx=%d, flags=0x%04x",
i, stridx, natidx_getter, natidx_setter, prop_flags);
c_func_getter = duk_bi_native_functions[natidx_getter];
c_func_setter = duk_bi_native_functions[natidx_setter];
duk_push_c_function_noconstruct_nospecial(ctx, c_func_getter, 0); /* always 0 args */
duk_push_c_function_noconstruct_nospecial(ctx, c_func_setter, 1); /* always 1 arg */
/* FIXME: magic for getter/setter? */
prop_flags |= DUK_PROPDESC_FLAG_ACCESSOR; /* accessor flag not encoded explicitly */
duk_hobject_define_accessor_internal(thr,
duk_require_hobject(ctx, i),
DUK_HTHREAD_GET_STRING(thr, stridx),
duk_require_hobject(ctx, -2),
duk_require_hobject(ctx, -1),
prop_flags);
duk_pop_2(ctx); /* getter and setter, now reachable through object */
goto skip_value;
}
default: {
/* exhaustive */
DUK_UNREACHABLE();
}
}
DUK_ASSERT((prop_flags & DUK_PROPDESC_FLAG_ACCESSOR) == 0);
duk_def_prop_stridx(ctx, i, stridx, prop_flags);
skip_value:
continue; /* avoid empty label at the end of a compound statement */
}
/* native function properties */
num = duk_bd_decode(bd, DUK__NUM_FUNC_PROPS_BITS);
DUK_DDDPRINT("built-in object %d, %d function valued properties", i, num);
for (j = 0; j < num; j++) {
int stridx;
int natidx;
int c_nargs;
int c_length;
duk_int16_t magic;
duk_c_function c_func;
duk_hnativefunction *h_func;
stridx = duk_bd_decode(bd, DUK__STRIDX_BITS);
natidx = duk_bd_decode(bd, DUK__NATIDX_BITS);
c_length = duk_bd_decode(bd, DUK__LENGTH_PROP_BITS);
c_nargs = duk_bd_decode_flagged(bd, DUK__NARGS_BITS, (duk_int32_t) c_length /*def_value*/);
if (c_nargs == DUK__NARGS_VARARGS_MARKER) {
c_nargs = DUK_VARARGS;
}
c_func = duk_bi_native_functions[natidx];
DUK_DDDPRINT("built-in %d, function-valued property %d, stridx %d, natidx %d, length %d, nargs %d",
i, j, stridx, natidx, c_length, (c_nargs == DUK_VARARGS ? -1 : c_nargs));
/* [ (builtin objects) ] */
duk_push_c_function_noconstruct_nospecial(ctx, c_func, c_nargs);
h_func = duk_require_hnativefunction(ctx, -1);
DUK_UNREF(h_func);
/* Currently all built-in native functions are strict.
* This doesn't matter for many functions, but e.g.
* String.prototype.charAt (and other string functions)
* rely on being strict so that their 'this' binding is
* not automatically coerced.
*/
DUK_HOBJECT_SET_STRICT((duk_hobject *) h_func);
/* No built-in functions are constructable except the top
* level ones (Number, etc).
*/
DUK_ASSERT(!DUK_HOBJECT_HAS_CONSTRUCTABLE((duk_hobject *) h_func));
/* FIXME: any way to avoid decoding magic bit; there are quite
* many function properties and relatively few with magic values.
*/
/* Cast converts magic to 16-bit signed value */
magic = (duk_int16_t) duk_bd_decode_flagged(bd, DUK__MAGIC_BITS, 0);
h_func->magic = magic;
/* [ (builtin objects) func ] */
duk_push_int(ctx, c_length);
duk_def_prop_stridx(ctx, -2, DUK_STRIDX_LENGTH, DUK_PROPDESC_FLAGS_NONE);
duk_push_hstring_stridx(ctx, stridx);
duk_def_prop_stridx(ctx, -2, DUK_STRIDX_NAME, DUK_PROPDESC_FLAGS_NONE);
/* FIXME: other properties of function instances; 'arguments', 'caller'. */
DUK_DDPRINT("built-in object %d, function property %d -> %!T", i, j, duk_get_tval(ctx, -1));
/* [ (builtin objects) func ] */
/*
* The default property attributes are correct for all
* function valued properties of built-in objects now.
*/
duk_def_prop_stridx(ctx, i, stridx, DUK_PROPDESC_FLAGS_WC);
/* [ (builtin objects) ] */
}
}
/*
* Special post-tweaks, for cases not covered by the init data format.
*
* - Set Date.prototype.toGMTString to Date.prototype.toUTCString.
* toGMTString is required to have the same Function object as
* toUTCString in E5 Section B.2.6. Note that while Smjs respects
* this, V8 does not (the Function objects are distinct).
*
* - Make DoubleError non-extensible.
*
* - Add info about most important effective compile options to Duktape.
*/
duk_get_prop_stridx(ctx, DUK_BIDX_DATE_PROTOTYPE, DUK_STRIDX_TO_UTC_STRING);
duk_def_prop_stridx(ctx, DUK_BIDX_DATE_PROTOTYPE, DUK_STRIDX_TO_GMT_STRING, DUK_PROPDESC_FLAGS_WC);
h = duk_require_hobject(ctx, DUK_BIDX_DOUBLE_ERROR);
DUK_ASSERT(h != NULL);
DUK_HOBJECT_CLEAR_EXTENSIBLE(h);
duk_push_string(ctx,
#if defined(DUK_USE_INTEGER_LE)
"l"
#elif defined(DUK_USE_INTEGER_BE)
"b"
#elif defined(DUK_USE_INTEGER_ME) /* integer mixed endian not really used now */
"m"
#else
"?"
#endif
#if defined(DUK_USE_DOUBLE_LE)
"l"
#elif defined(DUK_USE_DOUBLE_BE)
"b"
#elif defined(DUK_USE_DOUBLE_ME)
"m"
#else
"?"
#endif
#if defined(DUK_USE_BYTEORDER_FORCED)
"f"
#endif
" "
#if defined(DUK_USE_PACKED_TVAL)
"p"
#else
"u"
#endif
" "
#if defined(DUK_USE_HOBJECT_LAYOUT_1)
"p1"
#elif defined(DUK_USE_HOBJECT_LAYOUT_2)
"p2"
#elif defined(DUK_USE_HOBJECT_LAYOUT_3)
"p3"
#else
"p?"
#endif
" "
#if defined(DUK_USE_ALIGN_4)
"a4"
#elif defined(DUK_USE_ALIGN_8)
"a8"
#else
"a1"
#endif
" "
DUK_USE_ARCH_STRING);
duk_def_prop_stridx(ctx, DUK_BIDX_DUKTAPE, DUK_STRIDX_ENV, DUK_PROPDESC_FLAGS_WC);
/*
* InitJS code - Ecmascript code evaluated from a built-in source
* which provides e.g. backward compatibility. User can also provide
* JS code to be evaluated at startup.
*/
#ifdef DUK_USE_INITJS
/* FIXME: compression */
duk_eval_string(ctx, (const char *) duk_initjs_data); /* initjs data is NUL terminated */
duk_pop(ctx);
#endif /* DUK_USE_INITJS */
#ifdef DUK_USE_USER_INITJS
/* FIXME: compression, at least as an option? */
/* FIXME: unused now */
duk_eval_string(ctx, (const char *) DUK_USE_USER_INITJS);
duk_pop(ctx);
#endif /* DUK_USE_USER_INITJS */
/*
* Since built-ins are not often extended, compact them.
*/
DUK_DDPRINT("compact built-ins");
for (i = 0; i < DUK_NUM_BUILTINS; i++) {
duk_hobject_compact_props(thr, thr->builtins[i]);
}
DUK_DPRINT("INITBUILTINS END");
#ifdef DUK_USE_DDEBUG
for (i = 0; i < DUK_NUM_BUILTINS; i++) {
DUK_DDPRINT("built-in object %d after initialization and compacting: %!@iO", i, thr->builtins[i]);
}
#endif
#ifdef DUK_USE_DDDEBUG
for (i = 0; i < DUK_NUM_BUILTINS; i++) {
DUK_DDDPRINT("built-in object %d after initialization and compacting", i);
DUK_DEBUG_DUMP_HOBJECT(thr->builtins[i]);
}
#endif
/*
* Pop built-ins from stack: they are now INCREF'd and
* reachable from the builtins[] array.
*/
duk_pop_n(ctx, DUK_NUM_BUILTINS);
DUK_ASSERT_TOP(ctx, 0);
}
/* Shared helper to implement ES2015 Object.setPrototypeOf,
* Object.prototype.__proto__ setter, and Reflect.setPrototypeOf.
*
* http://www.ecma-international.org/ecma-262/6.0/index.html#sec-get-object.prototype.__proto__
* http://www.ecma-international.org/ecma-262/6.0/index.html#sec-object.setprototypeof
*/
DUK_INTERNAL duk_ret_t duk_bi_object_setprototype_shared(duk_hthread *thr) {
/*
* magic = 0: __proto__ setter
* magic = 1: Object.setPrototypeOf()
* magic = 2: Reflect.setPrototypeOf()
*/
duk_hobject *h_obj;
duk_hobject *h_new_proto;
duk_hobject *h_curr;
duk_ret_t ret_success = 1; /* retval for success path */
duk_uint_t mask;
duk_int_t magic;
/* Preliminaries for __proto__ and setPrototypeOf (E6 19.1.2.18 steps 1-4). */
magic = duk_get_current_magic(thr);
if (magic == 0) {
duk_push_this_check_object_coercible(thr);
duk_insert(thr, 0);
if (!duk_check_type_mask(thr, 1, DUK_TYPE_MASK_NULL | DUK_TYPE_MASK_OBJECT)) {
return 0;
}
/* __proto__ setter returns 'undefined' on success unlike the
* setPrototypeOf() call which returns the target object.
*/
ret_success = 0;
} else {
if (magic == 1) {
duk_require_object_coercible(thr, 0);
} else {
duk_require_hobject_accept_mask(thr, 0,
DUK_TYPE_MASK_LIGHTFUNC |
DUK_TYPE_MASK_BUFFER);
}
duk_require_type_mask(thr, 1, DUK_TYPE_MASK_NULL | DUK_TYPE_MASK_OBJECT);
}
h_new_proto = duk_get_hobject(thr, 1);
/* h_new_proto may be NULL */
mask = duk_get_type_mask(thr, 0);
if (mask & (DUK_TYPE_MASK_LIGHTFUNC | DUK_TYPE_MASK_BUFFER)) {
duk_hobject *curr_proto;
curr_proto = thr->builtins[(mask & DUK_TYPE_MASK_LIGHTFUNC) ?
DUK_BIDX_FUNCTION_PROTOTYPE :
DUK_BIDX_UINT8ARRAY_PROTOTYPE];
if (h_new_proto == curr_proto) {
goto skip;
}
goto fail_nonextensible;
}
h_obj = duk_get_hobject(thr, 0);
if (h_obj == NULL) {
goto skip;
}
DUK_ASSERT(h_obj != NULL);
/* [[SetPrototypeOf]] standard behavior, E6 9.1.2. */
/* TODO: implement Proxy object support here */
if (h_new_proto == DUK_HOBJECT_GET_PROTOTYPE(thr->heap, h_obj)) {
goto skip;
}
if (!DUK_HOBJECT_HAS_EXTENSIBLE(h_obj)) {
goto fail_nonextensible;
}
for (h_curr = h_new_proto; h_curr != NULL; h_curr = DUK_HOBJECT_GET_PROTOTYPE(thr->heap, h_curr)) {
/* Loop prevention. */
if (h_curr == h_obj) {
goto fail_loop;
}
}
DUK_HOBJECT_SET_PROTOTYPE_UPDREF(thr, h_obj, h_new_proto);
/* fall thru */
skip:
duk_set_top(thr, 1);
if (magic == 2) {
duk_push_true(thr);
}
return ret_success;
fail_nonextensible:
fail_loop:
if (magic != 2) {
DUK_DCERROR_TYPE_INVALID_ARGS(thr);
} else {
duk_push_false(thr);
return 1;
}
}
DUK_LOCAL void duk__print_hobject(duk__dprint_state *st, duk_hobject *h) {
duk_fixedbuffer *fb = st->fb;
duk_uint_fast32_t i;
duk_tval *tv;
duk_hstring *key;
duk_bool_t first = 1;
const char *brace1 = "{";
const char *brace2 = "}";
duk_bool_t pushed_loopstack = 0;
if (duk_fb_is_full(fb)) {
return;
}
duk__print_shared_heaphdr(st, &h->hdr);
if (h && DUK_HOBJECT_HAS_ARRAY_PART(h)) {
brace1 = "[";
brace2 = "]";
}
if (!h) {
duk_fb_put_cstring(fb, "NULL");
goto finished;
}
if (st->depth >= st->depth_limit) {
const char *subtype = "generic";
if (DUK_HOBJECT_IS_COMPFUNC(h)) {
subtype = "compfunc";
} else if (DUK_HOBJECT_IS_NATFUNC(h)) {
subtype = "natfunc";
} else if (DUK_HOBJECT_IS_THREAD(h)) {
subtype = "thread";
} else if (DUK_HOBJECT_IS_BUFOBJ(h)) {
subtype = "bufobj";
} else if (DUK_HOBJECT_IS_ARRAY(h)) {
subtype = "array";
}
duk_fb_sprintf(fb, "%sobject/%s %p%s", (const char *) brace1, subtype, (void *) h, (const char *) brace2);
return;
}
for (i = 0; i < (duk_uint_fast32_t) st->loop_stack_index; i++) {
if (st->loop_stack[i] == h) {
duk_fb_sprintf(fb, "%sLOOP:%p%s", (const char *) brace1, (void *) h, (const char *) brace2);
return;
}
}
/* after this, return paths should 'goto finished' for decrement */
st->depth++;
if (st->loop_stack_index >= st->loop_stack_limit) {
duk_fb_sprintf(fb, "%sOUT-OF-LOOP-STACK%s", (const char *) brace1, (const char *) brace2);
goto finished;
}
st->loop_stack[st->loop_stack_index++] = h;
pushed_loopstack = 1;
/*
* Notation: double underscore used for internal properties which are not
* stored in the property allocation (e.g. '__valstack').
*/
duk_fb_put_cstring(fb, brace1);
if (DUK_HOBJECT_GET_PROPS(NULL, h)) {
duk_uint32_t a_limit;
a_limit = DUK_HOBJECT_GET_ASIZE(h);
if (st->internal) {
/* dump all allocated entries, unused entries print as 'unused',
* note that these may extend beyond current 'length' and look
* a bit funny.
*/
} else {
/* leave out trailing 'unused' elements */
while (a_limit > 0) {
tv = DUK_HOBJECT_A_GET_VALUE_PTR(NULL, h, a_limit - 1);
if (!DUK_TVAL_IS_UNUSED(tv)) {
break;
}
a_limit--;
}
}
for (i = 0; i < a_limit; i++) {
tv = DUK_HOBJECT_A_GET_VALUE_PTR(NULL, h, i);
DUK__COMMA();
duk__print_tval(st, tv);
}
for (i = 0; i < DUK_HOBJECT_GET_ENEXT(h); i++) {
key = DUK_HOBJECT_E_GET_KEY(NULL, h, i);
if (!key) {
continue;
}
if (!st->internal && DUK_HSTRING_HAS_HIDDEN(key)) {
continue;
}
DUK__COMMA();
duk__print_hstring(st, key, 0);
duk_fb_put_byte(fb, (duk_uint8_t) DUK_ASC_COLON);
if (DUK_HOBJECT_E_SLOT_IS_ACCESSOR(NULL, h, i)) {
duk_fb_sprintf(fb, "[get:%p,set:%p]",
(void *) DUK_HOBJECT_E_GET_VALUE(NULL, h, i).a.get,
(void *) DUK_HOBJECT_E_GET_VALUE(NULL, h, i).a.set);
} else {
tv = &DUK_HOBJECT_E_GET_VALUE(NULL, h, i).v;
duk__print_tval(st, tv);
}
if (st->heavy) {
duk_fb_sprintf(fb, "<%02lx>", (unsigned long) DUK_HOBJECT_E_GET_FLAGS(NULL, h, i));
}
}
}
if (st->internal) {
if (DUK_HOBJECT_HAS_EXTENSIBLE(h)) {
DUK__COMMA(); duk_fb_sprintf(fb, "__extensible:true");
}
if (DUK_HOBJECT_HAS_CONSTRUCTABLE(h)) {
DUK__COMMA(); duk_fb_sprintf(fb, "__constructable:true");
}
if (DUK_HOBJECT_HAS_BOUNDFUNC(h)) {
DUK__COMMA(); duk_fb_sprintf(fb, "__boundfunc:true");
}
if (DUK_HOBJECT_HAS_COMPFUNC(h)) {
DUK__COMMA(); duk_fb_sprintf(fb, "__compfunc:true");
}
if (DUK_HOBJECT_HAS_NATFUNC(h)) {
DUK__COMMA(); duk_fb_sprintf(fb, "__natfunc:true");
}
if (DUK_HOBJECT_HAS_BUFOBJ(h)) {
DUK__COMMA(); duk_fb_sprintf(fb, "__bufobj:true");
}
if (DUK_HOBJECT_HAS_THREAD(h)) {
DUK__COMMA(); duk_fb_sprintf(fb, "__thread:true");
}
if (DUK_HOBJECT_HAS_ARRAY_PART(h)) {
DUK__COMMA(); duk_fb_sprintf(fb, "__array_part:true");
}
if (DUK_HOBJECT_HAS_STRICT(h)) {
DUK__COMMA(); duk_fb_sprintf(fb, "__strict:true");
}
if (DUK_HOBJECT_HAS_NOTAIL(h)) {
DUK__COMMA(); duk_fb_sprintf(fb, "__notail:true");
}
if (DUK_HOBJECT_HAS_NEWENV(h)) {
DUK__COMMA(); duk_fb_sprintf(fb, "__newenv:true");
}
if (DUK_HOBJECT_HAS_NAMEBINDING(h)) {
DUK__COMMA(); duk_fb_sprintf(fb, "__namebinding:true");
}
if (DUK_HOBJECT_HAS_CREATEARGS(h)) {
DUK__COMMA(); duk_fb_sprintf(fb, "__createargs:true");
}
if (DUK_HOBJECT_HAS_ENVRECCLOSED(h)) {
DUK__COMMA(); duk_fb_sprintf(fb, "__envrecclosed:true");
}
if (DUK_HOBJECT_HAS_EXOTIC_ARRAY(h)) {
DUK__COMMA(); duk_fb_sprintf(fb, "__exotic_array:true");
}
if (DUK_HOBJECT_HAS_EXOTIC_STRINGOBJ(h)) {
DUK__COMMA(); duk_fb_sprintf(fb, "__exotic_stringobj:true");
}
if (DUK_HOBJECT_HAS_EXOTIC_ARGUMENTS(h)) {
DUK__COMMA(); duk_fb_sprintf(fb, "__exotic_arguments:true");
}
if (DUK_HOBJECT_HAS_EXOTIC_DUKFUNC(h)) {
DUK__COMMA(); duk_fb_sprintf(fb, "__exotic_dukfunc:true");
}
if (DUK_HOBJECT_IS_BUFOBJ(h)) {
DUK__COMMA(); duk_fb_sprintf(fb, "__exotic_bufobj:true");
}
if (DUK_HOBJECT_HAS_EXOTIC_PROXYOBJ(h)) {
DUK__COMMA(); duk_fb_sprintf(fb, "__exotic_proxyobj:true");
}
}
if (st->internal && DUK_HOBJECT_IS_ARRAY(h)) {
duk_harray *a = (duk_harray *) h;
DUK__COMMA(); duk_fb_sprintf(fb, "__length:%ld", (long) a->length);
DUK__COMMA(); duk_fb_sprintf(fb, "__length_nonwritable:%ld", (long) a->length_nonwritable);
} else if (st->internal && DUK_HOBJECT_IS_COMPFUNC(h)) {
duk_hcompfunc *f = (duk_hcompfunc *) h;
DUK__COMMA(); duk_fb_put_cstring(fb, "__data:");
duk__print_hbuffer(st, (duk_hbuffer *) DUK_HCOMPFUNC_GET_DATA(NULL, f));
DUK__COMMA(); duk_fb_put_cstring(fb, "__lexenv:"); duk__print_hobject(st, DUK_HCOMPFUNC_GET_LEXENV(NULL, f));
DUK__COMMA(); duk_fb_put_cstring(fb, "__varenv:"); duk__print_hobject(st, DUK_HCOMPFUNC_GET_VARENV(NULL, f));
DUK__COMMA(); duk_fb_sprintf(fb, "__nregs:%ld", (long) f->nregs);
DUK__COMMA(); duk_fb_sprintf(fb, "__nargs:%ld", (long) f->nargs);
#if defined(DUK_USE_DEBUGGER_SUPPORT)
DUK__COMMA(); duk_fb_sprintf(fb, "__start_line:%ld", (long) f->start_line);
DUK__COMMA(); duk_fb_sprintf(fb, "__end_line:%ld", (long) f->end_line);
#endif
DUK__COMMA(); duk_fb_put_cstring(fb, "__data:");
duk__print_hbuffer(st, (duk_hbuffer *) DUK_HCOMPFUNC_GET_DATA(NULL, f));
} else if (st->internal && DUK_HOBJECT_IS_NATFUNC(h)) {
duk_hnatfunc *f = (duk_hnatfunc *) h;
DUK__COMMA(); duk_fb_sprintf(fb, "__func:");
duk_fb_put_funcptr(fb, (duk_uint8_t *) &f->func, sizeof(f->func));
DUK__COMMA(); duk_fb_sprintf(fb, "__nargs:%ld", (long) f->nargs);
DUK__COMMA(); duk_fb_sprintf(fb, "__magic:%ld", (long) f->magic);
#if defined(DUK_USE_BUFFEROBJECT_SUPPORT)
} else if (st->internal && DUK_HOBJECT_IS_BUFOBJ(h)) {
duk_hbufobj *b = (duk_hbufobj *) h;
DUK__COMMA(); duk_fb_sprintf(fb, "__buf:");
duk__print_hbuffer(st, (duk_hbuffer *) b->buf);
DUK__COMMA(); duk_fb_sprintf(fb, "__buf_prop:");
duk__print_hobject(st, (duk_hobject *) b->buf_prop);
DUK__COMMA(); duk_fb_sprintf(fb, "__offset:%ld", (long) b->offset);
DUK__COMMA(); duk_fb_sprintf(fb, "__length:%ld", (long) b->length);
DUK__COMMA(); duk_fb_sprintf(fb, "__shift:%ld", (long) b->shift);
DUK__COMMA(); duk_fb_sprintf(fb, "__elemtype:%ld", (long) b->elem_type);
#endif
} else if (st->internal && DUK_HOBJECT_IS_THREAD(h)) {
duk_hthread *t = (duk_hthread *) h;
DUK__COMMA(); duk_fb_sprintf(fb, "__strict:%ld", (long) t->strict);
DUK__COMMA(); duk_fb_sprintf(fb, "__state:%ld", (long) t->state);
DUK__COMMA(); duk_fb_sprintf(fb, "__unused1:%ld", (long) t->unused1);
DUK__COMMA(); duk_fb_sprintf(fb, "__unused2:%ld", (long) t->unused2);
DUK__COMMA(); duk_fb_sprintf(fb, "__valstack_max:%ld", (long) t->valstack_max);
DUK__COMMA(); duk_fb_sprintf(fb, "__callstack_max:%ld", (long) t->callstack_max);
DUK__COMMA(); duk_fb_sprintf(fb, "__catchstack_max:%ld", (long) t->catchstack_max);
DUK__COMMA(); duk_fb_sprintf(fb, "__valstack:%p", (void *) t->valstack);
DUK__COMMA(); duk_fb_sprintf(fb, "__valstack_end:%p/%ld", (void *) t->valstack_end, (long) (t->valstack_end - t->valstack));
DUK__COMMA(); duk_fb_sprintf(fb, "__valstack_bottom:%p/%ld", (void *) t->valstack_bottom, (long) (t->valstack_bottom - t->valstack));
DUK__COMMA(); duk_fb_sprintf(fb, "__valstack_top:%p/%ld", (void *) t->valstack_top, (long) (t->valstack_top - t->valstack));
DUK__COMMA(); duk_fb_sprintf(fb, "__catchstack:%p", (void *) t->catchstack);
DUK__COMMA(); duk_fb_sprintf(fb, "__catchstack_size:%ld", (long) t->catchstack_size);
DUK__COMMA(); duk_fb_sprintf(fb, "__catchstack_top:%ld", (long) t->catchstack_top);
DUK__COMMA(); duk_fb_sprintf(fb, "__resumer:"); duk__print_hobject(st, (duk_hobject *) t->resumer);
/* XXX: print built-ins array? */
}
#if defined(DUK_USE_REFERENCE_COUNTING)
if (st->internal) {
DUK__COMMA(); duk_fb_sprintf(fb, "__refcount:%lu", (unsigned long) DUK_HEAPHDR_GET_REFCOUNT((duk_heaphdr *) h));
}
#endif
if (st->internal) {
DUK__COMMA(); duk_fb_sprintf(fb, "__class:%ld", (long) DUK_HOBJECT_GET_CLASS_NUMBER(h));
}
DUK__COMMA(); duk_fb_sprintf(fb, "__heapptr:%p", (void *) h); /* own pointer */
/* prototype should be last, for readability */
if (DUK_HOBJECT_GET_PROTOTYPE(NULL, h)) {
if (st->follow_proto) {
DUK__COMMA(); duk_fb_put_cstring(fb, "__prototype:"); duk__print_hobject(st, DUK_HOBJECT_GET_PROTOTYPE(NULL, h));
} else {
DUK__COMMA(); duk_fb_sprintf(fb, "__prototype:%p", (void *) DUK_HOBJECT_GET_PROTOTYPE(NULL, h));
}
}
duk_fb_put_cstring(fb, brace2);
#if defined(DUK_USE_HOBJECT_HASH_PART)
if (st->heavy && DUK_HOBJECT_GET_HSIZE(h) > 0) {
duk_fb_put_byte(fb, (duk_uint8_t) DUK_ASC_LANGLE);
for (i = 0; i < DUK_HOBJECT_GET_HSIZE(h); i++) {
duk_uint_t h_idx = DUK_HOBJECT_H_GET_INDEX(NULL, h, i);
if (i > 0) {
duk_fb_put_byte(fb, (duk_uint8_t) DUK_ASC_COMMA);
}
if (h_idx == DUK_HOBJECT_HASHIDX_UNUSED) {
duk_fb_sprintf(fb, "u");
} else if (h_idx == DUK_HOBJECT_HASHIDX_DELETED) {
duk_fb_sprintf(fb, "d");
} else {
duk_fb_sprintf(fb, "%ld", (long) h_idx);
}
}
duk_fb_put_byte(fb, (duk_uint8_t) DUK_ASC_RANGLE);
}
#endif
finished:
st->depth--;
if (pushed_loopstack) {
st->loop_stack_index--;
st->loop_stack[st->loop_stack_index] = NULL;
}
}