--- /dev/null
+/*
+ * Initialize built-in objects. Current thread must have a valstack
+ * and initialization errors may longjmp, so a setjmp() catch point
+ * must exist.
+ */
+
+#include "duk_internal.h"
+
+/*
+ * Encoding constants, must match genbuiltins.py
+ */
+
+#define DUK__CLASS_BITS 5
+#define DUK__BIDX_BITS 7
+#define DUK__STRIDX_BITS 9 /* XXX: try to optimize to 8 (would now be possible, <200 used) */
+#define DUK__NATIDX_BITS 8
+#define DUK__NUM_NORMAL_PROPS_BITS 6
+#define DUK__NUM_FUNC_PROPS_BITS 6
+#define DUK__PROP_FLAGS_BITS 3
+#define DUK__STRING_LENGTH_BITS 8
+#define DUK__STRING_CHAR_BITS 7
+#define DUK__LENGTH_PROP_BITS 3
+#define DUK__NARGS_BITS 3
+#define DUK__PROP_TYPE_BITS 3
+#define DUK__MAGIC_BITS 16
+
+#define DUK__NARGS_VARARGS_MARKER 0x07
+#define DUK__NO_CLASS_MARKER 0x00 /* 0 = DUK_HOBJECT_CLASS_UNUSED */
+#define DUK__NO_BIDX_MARKER 0x7f
+#define DUK__NO_STRIDX_MARKER 0xff
+
+#define DUK__PROP_TYPE_DOUBLE 0
+#define DUK__PROP_TYPE_STRING 1
+#define DUK__PROP_TYPE_STRIDX 2
+#define DUK__PROP_TYPE_BUILTIN 3
+#define DUK__PROP_TYPE_UNDEFINED 4
+#define DUK__PROP_TYPE_BOOLEAN_TRUE 5
+#define DUK__PROP_TYPE_BOOLEAN_FALSE 6
+#define DUK__PROP_TYPE_ACCESSOR 7
+
+/*
+ * Create built-in objects by parsing an init bitstream generated
+ * by genbuiltins.py.
+ */
+
+#if defined(DUK_USE_ROM_OBJECTS)
+#if defined(DUK_USE_ROM_GLOBAL_CLONE) || defined(DUK_USE_ROM_GLOBAL_INHERIT)
+DUK_LOCAL void duk__duplicate_ram_global_object(duk_hthread *thr) {
+ duk_context *ctx;
+ duk_hobject *h1;
+#if defined(DUK_USE_ROM_GLOBAL_CLONE)
+ duk_hobject *h2;
+ duk_uint8_t *props;
+ duk_size_t alloc_size;
+#endif
+
+ ctx = (duk_context *) thr;
+
+ /* XXX: refactor into internal helper, duk_clone_hobject() */
+
+#if defined(DUK_USE_ROM_GLOBAL_INHERIT)
+ /* Inherit from ROM-based global object: less RAM usage, less transparent. */
+ duk_push_object_helper(ctx,
+ DUK_HOBJECT_FLAG_EXTENSIBLE |
+ DUK_HOBJECT_CLASS_AS_FLAGS(DUK_HOBJECT_CLASS_GLOBAL),
+ DUK_BIDX_GLOBAL);
+ h1 = duk_get_hobject(ctx, -1);
+ DUK_ASSERT(h1 != NULL);
+#elif defined(DUK_USE_ROM_GLOBAL_CLONE)
+ /* Clone the properties of the ROM-based global object to create a
+ * fully RAM-based global object. Uses more memory than the inherit
+ * model but more compliant.
+ */
+ duk_push_object_helper(ctx,
+ DUK_HOBJECT_FLAG_EXTENSIBLE |
+ DUK_HOBJECT_CLASS_AS_FLAGS(DUK_HOBJECT_CLASS_GLOBAL),
+ DUK_BIDX_OBJECT_PROTOTYPE);
+ h1 = duk_get_hobject(ctx, -1);
+ DUK_ASSERT(h1 != NULL);
+ h2 = thr->builtins[DUK_BIDX_GLOBAL];
+ DUK_ASSERT(h2 != NULL);
+
+ /* Copy the property table verbatim; this handles attributes etc.
+ * For ROM objects it's not necessary (or possible) to update
+ * refcounts so leave them as is.
+ */
+ alloc_size = DUK_HOBJECT_P_ALLOC_SIZE(h2);
+ DUK_ASSERT(alloc_size > 0);
+ props = DUK_ALLOC(thr->heap, alloc_size);
+ if (!props) {
+ DUK_ERROR_ALLOC_DEFMSG(thr);
+ return;
+ }
+ DUK_ASSERT(DUK_HOBJECT_GET_PROPS(thr->heap, h2) != NULL);
+ DUK_MEMCPY((void *) props, (const void *) DUK_HOBJECT_GET_PROPS(thr->heap, h2), alloc_size);
+
+ /* XXX: keep property attributes or tweak them here?
+ * Properties will now be non-configurable even when they're
+ * normally configurable for the global object.
+ */
+
+ DUK_ASSERT(DUK_HOBJECT_GET_PROPS(thr->heap, h1) == NULL);
+ DUK_HOBJECT_SET_PROPS(thr->heap, h1, props);
+ DUK_HOBJECT_SET_ESIZE(h1, DUK_HOBJECT_GET_ESIZE(h2));
+ DUK_HOBJECT_SET_ENEXT(h1, DUK_HOBJECT_GET_ENEXT(h2));
+ DUK_HOBJECT_SET_ASIZE(h1, DUK_HOBJECT_GET_ASIZE(h2));
+ DUK_HOBJECT_SET_HSIZE(h1, DUK_HOBJECT_GET_HSIZE(h2));
+#else
+#error internal error in defines
+#endif
+
+ duk_hobject_compact_props(thr, h1);
+ DUK_ASSERT(thr->builtins[DUK_BIDX_GLOBAL] != NULL);
+ DUK_ASSERT(!DUK_HEAPHDR_NEEDS_REFCOUNT_UPDATE((duk_heaphdr *) thr->builtins[DUK_BIDX_GLOBAL])); /* no need to decref */
+ thr->builtins[DUK_BIDX_GLOBAL] = h1;
+ DUK_HOBJECT_INCREF(thr, h1);
+ DUK_D(DUK_DPRINT("duplicated global object: %!O", h1));
+
+
+ /* Create a fresh object environment for the global scope. This is
+ * needed so that the global scope points to the newly created RAM-based
+ * global object.
+ */
+ duk_push_object_helper(ctx,
+ DUK_HOBJECT_FLAG_EXTENSIBLE |
+ DUK_HOBJECT_CLASS_AS_FLAGS(DUK_HOBJECT_CLASS_OBJENV),
+ -1); /* no prototype */
+ h1 = duk_get_hobject(ctx, -1);
+ DUK_ASSERT(h1 != NULL);
+ duk_dup(ctx, -2);
+ duk_dup(ctx, -1); /* -> [ ... new_global new_globalenv new_global new_global ] */
+ duk_xdef_prop_stridx(thr, -3, DUK_STRIDX_INT_TARGET, DUK_PROPDESC_FLAGS_NONE);
+ duk_xdef_prop_stridx(thr, -2, DUK_STRIDX_INT_THIS, DUK_PROPDESC_FLAGS_NONE); /* always provideThis=true */
+
+ duk_hobject_compact_props(thr, h1);
+ DUK_ASSERT(thr->builtins[DUK_BIDX_GLOBAL_ENV] != NULL);
+ DUK_ASSERT(!DUK_HEAPHDR_NEEDS_REFCOUNT_UPDATE((duk_heaphdr *) thr->builtins[DUK_BIDX_GLOBAL_ENV])); /* no need to decref */
+ thr->builtins[DUK_BIDX_GLOBAL_ENV] = h1;
+ DUK_HOBJECT_INCREF(thr, h1);
+ DUK_D(DUK_DPRINT("duplicated global env: %!O", h1));
+
+ duk_pop_2(ctx);
+}
+#endif /* DUK_USE_ROM_GLOBAL_CLONE || DUK_USE_ROM_GLOBAL_INHERIT */
+
+DUK_INTERNAL void duk_hthread_create_builtin_objects(duk_hthread *thr) {
+ /* Setup builtins from ROM objects. All heaps/threads will share
+ * the same readonly objects.
+ */
+ duk_small_uint_t i;
+
+ for (i = 0; i < DUK_NUM_BUILTINS; i++) {
+ duk_hobject *h;
+ h = (duk_hobject *) DUK_LOSE_CONST(duk_rom_builtins_bidx[i]);
+ DUK_ASSERT(h != NULL);
+ thr->builtins[i] = h;
+ }
+
+#if defined(DUK_USE_ROM_GLOBAL_CLONE) || defined(DUK_USE_ROM_GLOBAL_INHERIT)
+ /* By default the global object is read-only which is often much
+ * more of an issue than having read-only built-in objects (like
+ * RegExp, Date, etc). Use a RAM-based copy of the global object
+ * and the global environment object for convenience.
+ */
+ duk__duplicate_ram_global_object(thr);
+#endif
+}
+#else /* DUK_USE_ROM_OBJECTS */
+DUK_LOCAL void duk__push_stridx(duk_context *ctx, duk_bitdecoder_ctx *bd) {
+ 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);
+}
+DUK_LOCAL void duk__push_string(duk_context *ctx, duk_bitdecoder_ctx *bd) {
+ duk_small_uint_t n;
+ duk_small_uint_t i;
+ 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 (i = 0; i < n; i++) {
+ *p++ = (duk_uint8_t) duk_bd_decode(bd, DUK__STRING_CHAR_BITS);
+ }
+ duk_to_string(ctx, -1);
+}
+DUK_LOCAL void duk__push_stridx_or_string(duk_context *ctx, duk_bitdecoder_ctx *bd) {
+ if (duk_bd_decode_flag(bd)) {
+ duk__push_string(ctx, bd);
+ } else {
+ duk__push_stridx(ctx, bd);
+ }
+}
+DUK_LOCAL void duk__push_double(duk_context *ctx, duk_bitdecoder_ctx *bd) {
+ duk_double_union du;
+ duk_small_uint_t i;
+
+ for (i = 0; i < 8; i++) {
+ /* Encoding endianness must match target memory layout,
+ * build scripts and genbuiltins.py must ensure this.
+ */
+ du.uc[i] = (duk_uint8_t) duk_bd_decode(bd, 8);
+ }
+
+ duk_push_number(ctx, du.d); /* push operation normalizes NaNs */
+}
+
+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_NUM_BUILTINS=%d, DUK_NUM_BUILTINS_ALL=%d", (int) DUK_NUM_BUILTINS, (int) DUK_NUM_ALL_BUILTINS));
+
+ 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.
+ *
+ * Built-ins in the index range [0,DUK_NUM_BUILTINS-1] have value
+ * stack indices matching their eventual thr->builtins[] index.
+ *
+ * Built-ins in the index range [DUK_NUM_BUILTINS,DUK_NUM_ALL_BUILTINS]
+ * will exist on the value stack during init but won't be placed
+ * into thr->builtins[]. These are objects referenced in some way
+ * from thr->builtins[] roots but which don't need to be indexed by
+ * Duktape through thr->builtins[] (e.g. user custom objects).
+ */
+
+ duk_require_stack(ctx, DUK_NUM_ALL_BUILTINS);
+
+ DUK_DD(DUK_DDPRINT("create empty built-ins"));
+ DUK_ASSERT_TOP(ctx, 0);
+ for (i = 0; i < DUK_NUM_ALL_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_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);
+ 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 */
+
+ /* Built-in 'name' is not writable by default. Function '.name'
+ * is writable to allow user code to set a '.name' on a native
+ * function.
+ */
+ duk__push_stridx_or_string(ctx, bd);
+ duk_xdef_prop_stridx(ctx,
+ -2,
+ DUK_STRIDX_NAME,
+ (i == DUK_BIDX_FUNCTION_PROTOTYPE) ?
+ DUK_PROPDESC_FLAGS_W : 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);
+
+ if (i < DUK_NUM_BUILTINS) {
+ 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_ALL_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 = duk_require_hobject(ctx, i);
+ DUK_ASSERT(h != NULL);
+
+ 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, duk_require_hobject(ctx, 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 prop_flags;
+
+ duk__push_stridx_or_string(ctx, bd);
+
+ /*
+ * 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 {
+ 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, key %!T, flags 0x%02lx, type %ld",
+ (long) i, (long) j, duk_get_tval(ctx, -1), (unsigned long) prop_flags, (long) t));
+
+ switch (t) {
+ case DUK__PROP_TYPE_DOUBLE: {
+ duk__push_double(ctx, bd);
+ break;
+ }
+ case DUK__PROP_TYPE_STRING: {
+ duk__push_string(ctx, bd);
+ break;
+ }
+ case DUK__PROP_TYPE_STRIDX: {
+ duk__push_stridx(ctx, bd);
+ 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, key=%!T, getteridx=%ld, setteridx=%ld, flags=0x%04lx",
+ (long) i, duk_get_tval(ctx, -1), (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? use duk_def_prop()? */
+
+ DUK_ASSERT((prop_flags & DUK_PROPDESC_FLAG_WRITABLE) == 0); /* genbuiltins.py ensures */
+
+ prop_flags |= DUK_PROPDESC_FLAG_ACCESSOR; /* accessor flag not encoded explicitly */
+ duk_hobject_define_accessor_internal(thr,
+ duk_require_hobject(ctx, i),
+ duk_get_hstring(ctx, -3),
+ duk_require_hobject(ctx, -2),
+ duk_require_hobject(ctx, -1),
+ prop_flags);
+ duk_pop_3(ctx); /* key, 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(ctx, i, 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_hstring *h_key;
+ 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
+
+ duk__push_stridx_or_string(ctx, bd);
+ h_key = duk_get_hstring(ctx, -1);
+ DUK_ASSERT(h_key != NULL);
+ DUK_UNREF(h_key);
+ 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, key %!O, natidx %ld, length %ld, nargs %ld",
+ (long) i, (long) j, (duk_heaphdr *) h_key, (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 (h_key == DUK_HTHREAD_STRING_EVAL(thr) ||
+ h_key == DUK_HTHREAD_STRING_YIELD(thr) ||
+ h_key == DUK_HTHREAD_STRING_RESUME(thr) ||
+ h_key == DUK_HTHREAD_STRING_REQUIRE(thr)) {
+ /* 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: key=%!O, i=%d, j=%d", (duk_heaphdr *) h_key, (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) name ] */
+
+ 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) name func ] */
+
+ duk_push_int(ctx, c_length);
+ duk_xdef_prop_stridx(ctx, -2, DUK_STRIDX_LENGTH, DUK_PROPDESC_FLAGS_NONE);
+
+ duk_dup(ctx, -2);
+ 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) name 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(ctx, i, 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
+
+ /* XXX: relocate */
+ 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
+ " "
+ /* 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
+#if defined(DUK_USE_ROM_STRINGS) || defined(DUK_USE_ROM_OBJECTS)
+ /* XXX: This won't be shown in practice now
+ * because this code is not run when builtins
+ * are in ROM.
+ */
+ "Z"
+#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 (DUK_USE_ALIGN_BY == 4)
+ "a4"
+#elif (DUK_USE_ALIGN_BY == 8)
+ "a8"
+#elif (DUK_USE_ALIGN_BY == 1)
+ "a1"
+#else
+#error invalid DUK_USE_ALIGN_BY
+#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_ALL_BUILTINS; i++) {
+ duk_hobject_compact_props(thr, duk_require_hobject(ctx, i));
+ }
+
+ DUK_D(DUK_DPRINT("INITBUILTINS END"));
+
+#ifdef DUK_USE_DDPRINT
+ for (i = 0; i < DUK_NUM_ALL_BUILTINS; i++) {
+ DUK_DD(DUK_DDPRINT("built-in object %ld after initialization and compacting: %!@iO",
+ (long) i, (duk_heaphdr *) duk_require_hobject(ctx, i)));
+ }
+#endif
+
+ /*
+ * Pop built-ins from stack: they are now INCREF'd and
+ * reachable from the builtins[] array or indirectly
+ * through builtins[].
+ */
+
+ duk_set_top(ctx, 0);
+ DUK_ASSERT_TOP(ctx, 0);
+}
+#endif /* DUK_USE_ROM_OBJECTS */
+
+DUK_INTERNAL void duk_hthread_copy_builtin_objects(duk_hthread *thr_from, duk_hthread *thr_to) {
+ duk_small_uint_t i;
+
+ for (i = 0; i < DUK_NUM_BUILTINS; i++) {
+ thr_to->builtins[i] = thr_from->builtins[i];
+ DUK_HOBJECT_INCREF_ALLOWNULL(thr_to, thr_to->builtins[i]); /* side effect free */
+ }
+}
projects / ceph.git / blobdiff