DUK_INTERNAL void duk_resolve_nonbound_function(duk_context *ctx) {
duk_uint_t sanity;
duk_tval *tv;
sanity = DUK_HOBJECT_BOUND_CHAIN_SANITY;
do {
tv = DUK_GET_TVAL_NEGIDX(ctx, -1);
if (DUK_TVAL_IS_LIGHTFUNC(tv)) {
/* Lightweight function: never bound, so terminate. */
break;
} else if (DUK_TVAL_IS_OBJECT(tv)) {
duk_hobject *func;
func = DUK_TVAL_GET_OBJECT(tv);
DUK_ASSERT(func != NULL);
if (!DUK_HOBJECT_IS_CALLABLE(func) || !DUK_HOBJECT_HAS_BOUNDFUNC(func)) {
break;
}
duk_get_prop_stridx_short(ctx, -1, DUK_STRIDX_INT_TARGET);
duk_replace(ctx, -2);
} else {
break;
}
} while (--sanity > 0);
}
DUK_LOCAL duk_ret_t duk__finalize_helper(duk_context *ctx, void *udata) {
duk_hthread *thr;
DUK_ASSERT(ctx != NULL);
thr = (duk_hthread *) ctx;
DUK_UNREF(udata);
DUK_DDD(DUK_DDDPRINT("protected finalization helper running"));
/* [... obj] */
/* XXX: Finalizer lookup should traverse the prototype chain (to allow
* inherited finalizers) but should not invoke accessors or proxy object
* behavior. At the moment this lookup will invoke proxy behavior, so
* caller must ensure that this function is not called if the target is
* a Proxy.
*/
duk_get_prop_stridx_short(ctx, -1, DUK_STRIDX_INT_FINALIZER); /* -> [... obj finalizer] */
if (!duk_is_callable(ctx, -1)) {
DUK_DDD(DUK_DDDPRINT("-> no finalizer or finalizer not callable"));
return 0;
}
duk_dup_m2(ctx);
duk_push_boolean(ctx, DUK_HEAP_HAS_FINALIZER_NORESCUE(thr->heap));
DUK_DDD(DUK_DDDPRINT("-> finalizer found, calling finalizer"));
duk_call(ctx, 2); /* [ ... obj finalizer obj heapDestruct ] -> [ ... obj retval ] */
DUK_DDD(DUK_DDDPRINT("finalizer finished successfully"));
return 0;
/* Note: we rely on duk_safe_call() to fix up the stack for the caller,
* so we don't need to pop stuff here. There is no return value;
* caller determines rescued status based on object refcount.
*/
}
DUK_INTERNAL duk_ret_t duk_bi_error_prototype_to_string(duk_context *ctx) {
/* XXX: optimize with more direct internal access */
duk_push_this(ctx);
(void) duk_require_hobject_promote_mask(ctx, -1, DUK_TYPE_MASK_LIGHTFUNC | DUK_TYPE_MASK_BUFFER);
/* [ ... this ] */
duk_get_prop_stridx_short(ctx, -1, DUK_STRIDX_NAME);
if (duk_is_undefined(ctx, -1)) {
duk_pop(ctx);
duk_push_string(ctx, "Error");
} else {
duk_to_string(ctx, -1);
}
/* [ ... this name ] */
/* XXX: Are steps 6 and 7 in E5 Section 15.11.4.4 duplicated by
* accident or are they actually needed? The first ToString()
* could conceivably return 'undefined'.
*/
duk_get_prop_stridx_short(ctx, -2, DUK_STRIDX_MESSAGE);
if (duk_is_undefined(ctx, -1)) {
duk_pop(ctx);
duk_push_hstring_empty(ctx);
} else {
duk_to_string(ctx, -1);
}
/* [ ... this name message ] */
if (duk_get_length(ctx, -2) == 0) {
/* name is empty -> return message */
return 1;
}
if (duk_get_length(ctx, -1) == 0) {
/* message is empty -> return name */
duk_pop(ctx);
return 1;
}
duk_push_string(ctx, ": ");
duk_insert(ctx, -2); /* ... name ': ' message */
duk_concat(ctx, 3);
return 1;
}
DUK_INTERNAL duk_ret_t duk_bi_object_prototype_to_locale_string(duk_hthread *thr) {
DUK_ASSERT_TOP(thr, 0);
(void) duk_push_this_coercible_to_object(thr);
duk_get_prop_stridx_short(thr, 0, DUK_STRIDX_TO_STRING);
#if 0 /* This is mentioned explicitly in the E5.1 spec, but duk_call_method() checks for it in practice. */
duk_require_callable(thr, 1);
#endif
duk_dup_0(thr); /* -> [ O toString O ] */
duk_call_method(thr, 0); /* XXX: call method tail call? */
return 1;
}
/* XXX: much to improve (code size) */
DUK_INTERNAL duk_ret_t duk_bi_regexp_constructor(duk_hthread *thr) {
duk_hobject *h_pattern;
DUK_ASSERT_TOP(thr, 2);
h_pattern = duk_get_hobject(thr, 0);
if (!duk_is_constructor_call(thr) &&
h_pattern != NULL &&
DUK_HOBJECT_GET_CLASS_NUMBER(h_pattern) == DUK_HOBJECT_CLASS_REGEXP &&
duk_is_undefined(thr, 1)) {
/* Called as a function, pattern has [[Class]] "RegExp" and
* flags is undefined -> return object as is.
*/
/* XXX: ES2015 has a NewTarget SameValue() check which is not
* yet implemented.
*/
duk_dup_0(thr);
return 1;
}
/* Else functionality is identical for function call and constructor
* call.
*/
if (h_pattern != NULL &&
DUK_HOBJECT_GET_CLASS_NUMBER(h_pattern) == DUK_HOBJECT_CLASS_REGEXP) {
duk_get_prop_stridx_short(thr, 0, DUK_STRIDX_SOURCE);
if (duk_is_undefined(thr, 1)) {
/* In ES5 one would need to read the flags individually;
* in ES2015 just read .flags.
*/
duk_get_prop_stridx(thr, 0, DUK_STRIDX_FLAGS);
} else {
/* In ES2015 allowed; overrides argument RegExp flags. */
duk_dup_1(thr);
}
} else {
if (duk_is_undefined(thr, 0)) {
duk_push_hstring_empty(thr);
} else {
duk_dup_0(thr);
duk_to_string(thr, -1); /* Rejects Symbols. */
}
if (duk_is_undefined(thr, 1)) {
duk_push_hstring_empty(thr);
} else {
duk_dup_1(thr);
duk_to_string(thr, -1); /* Rejects Symbols. */
}
/* [ ... pattern flags ] */
}
DUK_DDD(DUK_DDDPRINT("RegExp constructor/function call, pattern=%!T, flags=%!T",
(duk_tval *) duk_get_tval(thr, -2), (duk_tval *) duk_get_tval(thr, -1)));
/* [ ... pattern flags ] (both uncoerced) */
duk_to_string(thr, -2);
duk_to_string(thr, -1);
duk_regexp_compile(thr);
/* [ ... bytecode escaped_source ] */
duk_regexp_create_instance(thr);
/* [ ... RegExp ] */
return 1;
}
/* Shared helper for providing .source, .global, .multiline, etc getters. */
DUK_INTERNAL duk_ret_t duk_bi_regexp_prototype_shared_getter(duk_hthread *thr) {
duk_hstring *h_bc;
duk_small_uint_t re_flags;
duk_hobject *h;
duk_int_t magic;
DUK_ASSERT_TOP(thr, 0);
duk_push_this(thr);
h = duk_require_hobject(thr, -1);
magic = duk_get_current_magic(thr);
if (DUK_HOBJECT_GET_CLASS_NUMBER(h) == DUK_HOBJECT_CLASS_REGEXP) {
duk_get_prop_stridx_short(thr, 0, DUK_STRIDX_INT_SOURCE);
duk_get_prop_stridx_short(thr, 0, DUK_STRIDX_INT_BYTECODE);
h_bc = duk_require_hstring(thr, -1);
re_flags = (duk_small_uint_t) DUK_HSTRING_GET_DATA(h_bc)[0]; /* Safe even if h_bc length is 0 (= NUL) */
duk_pop(thr);
} else if (h == thr->builtins[DUK_BIDX_REGEXP_PROTOTYPE]) {
/* In ES2015 and ES2016 a TypeError would be thrown here.
* However, this had real world issues so ES2017 draft
* allows RegExp.prototype specifically, returning '(?:)'
* for .source and undefined for all flags.
*/
if (magic != 16 /* .source */) {
return 0;
}
duk_push_literal(thr, "(?:)"); /* .source handled by switch-case */
re_flags = 0;
} else {
DUK_DCERROR_TYPE_INVALID_ARGS(thr);
}
/* [ regexp source ] */
switch (magic) {
case 0: { /* global */
duk_push_boolean(thr, (re_flags & DUK_RE_FLAG_GLOBAL));
break;
}
case 1: { /* ignoreCase */
duk_push_boolean(thr, (re_flags & DUK_RE_FLAG_IGNORE_CASE));
break;
}
case 2: { /* multiline */
duk_push_boolean(thr, (re_flags & DUK_RE_FLAG_MULTILINE));
break;
}
#if 0
/* Don't provide until implemented to avoid interfering with feature
* detection in user code.
*/
case 3: /* sticky */
case 4: { /* unicode */
duk_push_false(thr);
break;
}
#endif
default: { /* source */
/* leave 'source' on top */
break;
}
}
return 1;
}
DUK_EXTERNAL void duk_new(duk_context *ctx, duk_idx_t nargs) {
/*
* There are two [[Construct]] operations in the specification:
*
* - E5 Section 13.2.2: for Function objects
* - E5 Section 15.3.4.5.2: for "bound" Function objects
*
* The chain of bound functions is resolved in Section 15.3.4.5.2,
* with arguments "piling up" until the [[Construct]] internal
* method is called on the final, actual Function object. Note
* that the "prototype" property is looked up *only* from the
* final object, *before* calling the constructor.
*
* Currently we follow the bound function chain here to get the
* "prototype" property value from the final, non-bound function.
* However, we let duk_handle_call() handle the argument "piling"
* when the constructor is called. The bound function chain is
* thus now processed twice.
*
* When constructing new Array instances, an unnecessary object is
* created and discarded now: the standard [[Construct]] creates an
* object, and calls the Array constructor. The Array constructor
* returns an Array instance, which is used as the result value for
* the "new" operation; the object created before the Array constructor
* call is discarded.
*
* This would be easy to fix, e.g. by knowing that the Array constructor
* will always create a replacement object and skip creating the fallback
* object in that case.
*
* Note: functions called via "new" need to know they are called as a
* constructor. For instance, built-in constructors behave differently
* depending on how they are called.
*/
/* XXX: merge this with duk_js_call.c, as this function implements
* core semantics (or perhaps merge the two files altogether).
*/
duk_hthread *thr = (duk_hthread *) ctx;
duk_hobject *proto;
duk_hobject *cons;
duk_hobject *fallback;
duk_idx_t idx_cons;
duk_small_uint_t call_flags;
DUK_ASSERT_CTX_VALID(ctx);
/* [... constructor arg1 ... argN] */
idx_cons = duk_require_normalize_index(ctx, -nargs - 1);
DUK_DDD(DUK_DDDPRINT("top=%ld, nargs=%ld, idx_cons=%ld",
(long) duk_get_top(ctx), (long) nargs, (long) idx_cons));
/* XXX: code duplication */
/*
* Figure out the final, non-bound constructor, to get "prototype"
* property.
*/
duk_dup(ctx, idx_cons);
for (;;) {
duk_tval *tv;
tv = DUK_GET_TVAL_NEGIDX(ctx, -1);
DUK_ASSERT(tv != NULL);
if (DUK_TVAL_IS_OBJECT(tv)) {
cons = DUK_TVAL_GET_OBJECT(tv);
DUK_ASSERT(cons != NULL);
if (!DUK_HOBJECT_IS_CALLABLE(cons) || !DUK_HOBJECT_HAS_CONSTRUCTABLE(cons)) {
/* Checking callability of the immediate target
* is important, same for constructability.
* Checking it for functions down the bound
* function chain is not strictly necessary
* because .bind() should normally reject them.
* But it's good to check anyway because it's
* technically possible to edit the bound function
* chain via internal keys.
*/
goto not_constructable;
}
if (!DUK_HOBJECT_HAS_BOUNDFUNC(cons)) {
break;
}
} else if (DUK_TVAL_IS_LIGHTFUNC(tv)) {
/* Lightfuncs cannot be bound. */
break;
} else {
/* Anything else is not constructable. */
goto not_constructable;
}
duk_get_prop_stridx_short(ctx, -1, DUK_STRIDX_INT_TARGET); /* -> [... cons target] */
duk_remove_m2(ctx); /* -> [... target] */
}
DUK_ASSERT(duk_is_callable(ctx, -1));
DUK_ASSERT(duk_is_lightfunc(ctx, -1) ||
(duk_get_hobject(ctx, -1) != NULL && !DUK_HOBJECT_HAS_BOUNDFUNC(duk_get_hobject(ctx, -1))));
/* [... constructor arg1 ... argN final_cons] */
/*
* Create "fallback" object to be used as the object instance,
* unless the constructor returns a replacement value.
* Its internal prototype needs to be set based on "prototype"
* property of the constructor.
*/
duk_push_object(ctx); /* class Object, extensible */
/* [... constructor arg1 ... argN final_cons fallback] */
duk_get_prop_stridx_short(ctx, -2, DUK_STRIDX_PROTOTYPE);
proto = duk_get_hobject(ctx, -1);
if (!proto) {
DUK_DDD(DUK_DDDPRINT("constructor has no 'prototype' property, or value not an object "
"-> leave standard Object prototype as fallback prototype"));
} else {
DUK_DDD(DUK_DDDPRINT("constructor has 'prototype' property with object value "
"-> set fallback prototype to that value: %!iO", (duk_heaphdr *) proto));
fallback = duk_get_hobject(ctx, -2);
DUK_ASSERT(fallback != NULL);
DUK_HOBJECT_SET_PROTOTYPE_UPDREF(thr, fallback, proto);
}
duk_pop(ctx);
/* [... constructor arg1 ... argN final_cons fallback] */
/*
* Manipulate callstack for the call.
*/
duk_dup_top(ctx);
duk_insert(ctx, idx_cons + 1); /* use fallback as 'this' value */
duk_insert(ctx, idx_cons); /* also stash it before constructor,
* in case we need it (as the fallback value)
*/
duk_pop(ctx); /* pop final_cons */
/* [... fallback constructor fallback(this) arg1 ... argN];
* Note: idx_cons points to first 'fallback', not 'constructor'.
*/
DUK_DDD(DUK_DDDPRINT("before call, idx_cons+1 (constructor) -> %!T, idx_cons+2 (fallback/this) -> %!T, "
"nargs=%ld, top=%ld",
(duk_tval *) duk_get_tval(ctx, idx_cons + 1),
(duk_tval *) duk_get_tval(ctx, idx_cons + 2),
(long) nargs,
(long) duk_get_top(ctx)));
/*
* Call the constructor function (called in "constructor mode").
*/
call_flags = DUK_CALL_FLAG_CONSTRUCTOR_CALL; /* not protected, respect reclimit, is a constructor call */
duk_handle_call_unprotected(thr, /* thread */
nargs, /* num_stack_args */
call_flags); /* call_flags */
/* [... fallback retval] */
DUK_DDD(DUK_DDDPRINT("constructor call finished, fallback=%!iT, retval=%!iT",
(duk_tval *) duk_get_tval(ctx, -2),
(duk_tval *) duk_get_tval(ctx, -1)));
/*
* Determine whether to use the constructor return value as the created
* object instance or not.
*/
if (duk_check_type_mask(ctx, -1, DUK_TYPE_MASK_OBJECT |
DUK_TYPE_MASK_BUFFER |
DUK_TYPE_MASK_LIGHTFUNC)) {
duk_remove_m2(ctx);
} else {
duk_pop(ctx);
}
/*
* Augment created errors upon creation (not when they are thrown or
* rethrown). __FILE__ and __LINE__ are not desirable here; the call
* stack reflects the caller which is correct.
*/
#if defined(DUK_USE_AUGMENT_ERROR_CREATE)
duk_hthread_sync_currpc(thr);
duk_err_augment_error_create(thr, thr, NULL, 0, 1 /*noblame_fileline*/);
#endif
/* [... retval] */
return;
not_constructable:
#if defined(DUK_USE_VERBOSE_ERRORS)
#if defined(DUK_USE_PARANOID_ERRORS)
DUK_ERROR_FMT1(thr, DUK_ERR_TYPE_ERROR, "%s not constructable", duk_get_type_name(ctx, -1));
#else
DUK_ERROR_FMT1(thr, DUK_ERR_TYPE_ERROR, "%s not constructable", duk_push_string_readable(ctx, -1));
#endif
#else
DUK_ERROR_TYPE(thr, "not constructable");
#endif
}
DUK_INTERNAL duk_ret_t duk_bi_object_constructor_keys_shared(duk_hthread *thr) {
duk_hobject *obj;
#if defined(DUK_USE_ES6_PROXY)
duk_hobject *h_proxy_target;
duk_hobject *h_proxy_handler;
duk_hobject *h_trap_result;
#endif
duk_small_uint_t enum_flags;
duk_int_t magic;
DUK_ASSERT_TOP(thr, 1);
magic = duk_get_current_magic(thr);
if (magic == 3) {
/* ES2015 Section 26.1.11 requires a TypeError for non-objects. Lightfuncs
* and plain buffers pretend to be objects, so accept those too.
*/
obj = duk_require_hobject_promote_mask(thr, 0, DUK_TYPE_MASK_LIGHTFUNC | DUK_TYPE_MASK_BUFFER);
} else {
/* ES2015: ToObject coerce. */
obj = duk_to_hobject(thr, 0);
}
DUK_ASSERT(obj != NULL);
DUK_UNREF(obj);
/* XXX: proxy chains */
#if defined(DUK_USE_ES6_PROXY)
/* XXX: better sharing of code between proxy target call sites */
if (DUK_LIKELY(!duk_hobject_proxy_check(obj,
&h_proxy_target,
&h_proxy_handler))) {
goto skip_proxy;
}
duk_push_hobject(thr, h_proxy_handler);
if (!duk_get_prop_stridx_short(thr, -1, DUK_STRIDX_OWN_KEYS)) {
/* Careful with reachability here: don't pop 'obj' before pushing
* proxy target.
*/
DUK_DDD(DUK_DDDPRINT("no ownKeys trap, get keys of target instead"));
duk_pop_2(thr);
duk_push_hobject(thr, h_proxy_target);
duk_replace(thr, 0);
DUK_ASSERT_TOP(thr, 1);
goto skip_proxy;
}
/* [ obj handler trap ] */
duk_insert(thr, -2);
duk_push_hobject(thr, h_proxy_target); /* -> [ obj trap handler target ] */
duk_call_method(thr, 1 /*nargs*/); /* -> [ obj trap_result ] */
h_trap_result = duk_require_hobject(thr, -1);
DUK_UNREF(h_trap_result);
magic = duk_get_current_magic(thr);
DUK_ASSERT(magic >= 0 && magic < (duk_int_t) (sizeof(duk__object_keys_enum_flags) / sizeof(duk_small_uint_t)));
enum_flags = duk__object_keys_enum_flags[magic];
duk_proxy_ownkeys_postprocess(thr, h_proxy_target, enum_flags);
return 1;
skip_proxy:
#endif /* DUK_USE_ES6_PROXY */
DUK_ASSERT_TOP(thr, 1);
magic = duk_get_current_magic(thr);
DUK_ASSERT(magic >= 0 && magic < (duk_int_t) (sizeof(duk__object_keys_enum_flags) / sizeof(duk_small_uint_t)));
enum_flags = duk__object_keys_enum_flags[magic];
return duk_hobject_get_enumerated_keys(thr, enum_flags);
}
DUK_LOCAL duk_ret_t duk__error_getter_helper(duk_context *ctx, duk_small_int_t output_type) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_idx_t idx_td;
duk_small_int_t i; /* traceback depth fits into 16 bits */
duk_small_int_t t; /* stack type fits into 16 bits */
duk_small_int_t count_func = 0; /* traceback depth ensures fits into 16 bits */
const char *str_tailcall = " tailcall";
const char *str_strict = " strict";
const char *str_construct = " construct";
const char *str_prevyield = " preventsyield";
const char *str_directeval = " directeval";
const char *str_empty = "";
DUK_ASSERT_TOP(ctx, 0); /* fixed arg count */
DUK_UNREF(thr);
duk_push_this(ctx);
duk_get_prop_stridx_short(ctx, -1, DUK_STRIDX_INT_TRACEDATA);
idx_td = duk_get_top_index(ctx);
duk_push_hstring_stridx(ctx, DUK_STRIDX_NEWLINE_4SPACE);
duk_push_this(ctx);
/* [ ... this tracedata sep this ] */
/* XXX: skip null filename? */
if (duk_check_type(ctx, idx_td, DUK_TYPE_OBJECT)) {
/* Current tracedata contains 2 entries per callstack entry. */
for (i = 0; ; i += 2) {
duk_int_t pc;
duk_int_t line;
duk_int_t flags;
duk_double_t d;
const char *funcname;
const char *filename;
duk_hobject *h_func;
duk_hstring *h_name;
duk_require_stack(ctx, 5);
duk_get_prop_index(ctx, idx_td, i);
duk_get_prop_index(ctx, idx_td, i + 1);
d = duk_to_number_m1(ctx);
pc = (duk_int_t) DUK_FMOD(d, DUK_DOUBLE_2TO32);
flags = (duk_int_t) DUK_FLOOR(d / DUK_DOUBLE_2TO32);
t = (duk_small_int_t) duk_get_type(ctx, -2);
if (t == DUK_TYPE_OBJECT || t == DUK_TYPE_LIGHTFUNC) {
/*
* Ecmascript/native function call or lightfunc call
*/
count_func++;
/* [ ... v1(func) v2(pc+flags) ] */
h_func = duk_get_hobject(ctx, -2); /* NULL for lightfunc */
/* These may be systematically omitted by Duktape
* with certain config options, but allow user to
* set them on a case-by-case basis.
*/
duk_get_prop_stridx_short(ctx, -2, DUK_STRIDX_NAME);
duk_get_prop_stridx_short(ctx, -3, DUK_STRIDX_FILE_NAME);
#if defined(DUK_USE_PC2LINE)
line = duk_hobject_pc2line_query(ctx, -4, (duk_uint_fast32_t) pc);
#else
line = 0;
#endif
/* [ ... v1 v2 name filename ] */
/* When looking for .fileName/.lineNumber, blame first
* function which has a .fileName.
*/
if (duk_is_string_notsymbol(ctx, -1)) {
if (output_type == DUK__OUTPUT_TYPE_FILENAME) {
return 1;
} else if (output_type == DUK__OUTPUT_TYPE_LINENUMBER) {
duk_push_int(ctx, line);
return 1;
}
}
/* XXX: Change 'anon' handling here too, to use empty string for anonymous functions? */
/* XXX: Could be improved by coercing to a readable duk_tval (especially string escaping) */
h_name = duk_get_hstring_notsymbol(ctx, -2); /* may be NULL */
funcname = (h_name == NULL || h_name == DUK_HTHREAD_STRING_EMPTY_STRING(thr)) ?
"[anon]" : (const char *) DUK_HSTRING_GET_DATA(h_name);
filename = duk_get_string_notsymbol(ctx, -1);
filename = filename ? filename : "";
DUK_ASSERT(funcname != NULL);
DUK_ASSERT(filename != NULL);
if (h_func == NULL) {
duk_push_sprintf(ctx, "at %s light%s%s%s%s%s",
(const char *) funcname,
(const char *) ((flags & DUK_ACT_FLAG_STRICT) ? str_strict : str_empty),
(const char *) ((flags & DUK_ACT_FLAG_TAILCALLED) ? str_tailcall : str_empty),
(const char *) ((flags & DUK_ACT_FLAG_CONSTRUCT) ? str_construct : str_empty),
(const char *) ((flags & DUK_ACT_FLAG_DIRECT_EVAL) ? str_directeval : str_empty),
(const char *) ((flags & DUK_ACT_FLAG_PREVENT_YIELD) ? str_prevyield : str_empty));
} else if (DUK_HOBJECT_HAS_NATFUNC(h_func)) {
duk_push_sprintf(ctx, "at %s (%s) native%s%s%s%s%s",
(const char *) funcname,
(const char *) filename,
(const char *) ((flags & DUK_ACT_FLAG_STRICT) ? str_strict : str_empty),
(const char *) ((flags & DUK_ACT_FLAG_TAILCALLED) ? str_tailcall : str_empty),
(const char *) ((flags & DUK_ACT_FLAG_CONSTRUCT) ? str_construct : str_empty),
(const char *) ((flags & DUK_ACT_FLAG_DIRECT_EVAL) ? str_directeval : str_empty),
(const char *) ((flags & DUK_ACT_FLAG_PREVENT_YIELD) ? str_prevyield : str_empty));
} else {
duk_push_sprintf(ctx, "at %s (%s:%ld)%s%s%s%s%s",
(const char *) funcname,
(const char *) filename,
(long) line,
(const char *) ((flags & DUK_ACT_FLAG_STRICT) ? str_strict : str_empty),
(const char *) ((flags & DUK_ACT_FLAG_TAILCALLED) ? str_tailcall : str_empty),
(const char *) ((flags & DUK_ACT_FLAG_CONSTRUCT) ? str_construct : str_empty),
(const char *) ((flags & DUK_ACT_FLAG_DIRECT_EVAL) ? str_directeval : str_empty),
(const char *) ((flags & DUK_ACT_FLAG_PREVENT_YIELD) ? str_prevyield : str_empty));
}
duk_replace(ctx, -5); /* [ ... v1 v2 name filename str ] -> [ ... str v2 name filename ] */
duk_pop_3(ctx); /* -> [ ... str ] */
} else if (t == DUK_TYPE_STRING) {
const char *str_file;
/*
* __FILE__ / __LINE__ entry, here 'pc' is line number directly.
* Sometimes __FILE__ / __LINE__ is reported as the source for
* the error (fileName, lineNumber), sometimes not.
*/
/* [ ... v1(filename) v2(line+flags) ] */
/* When looking for .fileName/.lineNumber, blame compilation
* or C call site unless flagged not to do so.
*/
if (!(flags & DUK_TB_FLAG_NOBLAME_FILELINE)) {
if (output_type == DUK__OUTPUT_TYPE_FILENAME) {
duk_pop(ctx);
return 1;
} else if (output_type == DUK__OUTPUT_TYPE_LINENUMBER) {
duk_push_int(ctx, pc);
return 1;
}
}
/* Tracedata is trusted but avoid any risk of using a NULL
* for %s format because it has undefined behavior. Symbols
* don't need to be explicitly rejected as they pose no memory
* safety issues.
*/
str_file = (const char *) duk_get_string(ctx, -2);
duk_push_sprintf(ctx, "at [anon] (%s:%ld) internal",
(const char *) (str_file ? str_file : "null"), (long) pc);
duk_replace(ctx, -3); /* [ ... v1 v2 str ] -> [ ... str v2 ] */
duk_pop(ctx); /* -> [ ... str ] */
} else {
/* unknown, ignore */
duk_pop_2(ctx);
break;
}
}
if (count_func >= DUK_USE_TRACEBACK_DEPTH) {
/* Possibly truncated; there is no explicit truncation
* marker so this is the best we can do.
*/
duk_push_hstring_stridx(ctx, DUK_STRIDX_BRACKETED_ELLIPSIS);
}
}
/* [ ... this tracedata sep this str1 ... strN ] */
if (output_type != DUK__OUTPUT_TYPE_TRACEBACK) {
return 0;
} else {
/* The 'this' after 'sep' will get ToString() coerced by
* duk_join() automatically. We don't want to do that
* coercion when providing .fileName or .lineNumber (GH-254).
*/
duk_join(ctx, duk_get_top(ctx) - (idx_td + 2) /*count, not including sep*/);
return 1;
}
}
