|
|
|
/*
|
|
|
|
* Calls.
|
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|
|
*
|
|
|
|
* Protected variants should avoid ever throwing an error. Must be careful
|
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|
|
* to catch errors related to value stack manipulation and property lookup,
|
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|
|
* not just the call itself.
|
|
|
|
*
|
|
|
|
* The only exception is when arguments are insane, e.g. nargs/nrets are out
|
|
|
|
* of bounds; in such cases an error is thrown for two reasons. First, we
|
|
|
|
* can't always respect the value stack input/output guarantees in such cases
|
|
|
|
* so the caller would end up with the value stack in an unexpected state.
|
|
|
|
* Second, an attempt to create an error might itself fail (although this
|
|
|
|
* could be avoided by pushing a preallocated object/string or a primitive
|
|
|
|
* value).
|
|
|
|
*/
|
|
|
|
|
|
|
|
#include "duk_internal.h"
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Helpers
|
|
|
|
*/
|
|
|
|
|
|
|
|
struct duk__pcall_prop_args {
|
|
|
|
duk_idx_t obj_idx;
|
|
|
|
duk_idx_t nargs;
|
|
|
|
duk_small_uint_t call_flags;
|
|
|
|
};
|
|
|
|
typedef struct duk__pcall_prop_args duk__pcall_prop_args;
|
|
|
|
|
|
|
|
struct duk__pcall_method_args {
|
|
|
|
duk_idx_t nargs;
|
|
|
|
duk_small_uint_t call_flags;
|
|
|
|
};
|
|
|
|
typedef struct duk__pcall_method_args duk__pcall_method_args;
|
|
|
|
|
|
|
|
struct duk__pcall_args {
|
|
|
|
duk_idx_t nargs;
|
|
|
|
duk_small_uint_t call_flags;
|
|
|
|
};
|
|
|
|
typedef struct duk__pcall_args duk__pcall_args;
|
|
|
|
|
|
|
|
/* Compute and validate idx_func for a certain 'nargs' and 'other'
|
|
|
|
* parameter count (1 or 2, depending on whether 'this' binding is
|
|
|
|
* present).
|
|
|
|
*/
|
|
|
|
DUK_LOCAL duk_idx_t duk__call_get_idx_func(duk_hthread *thr, duk_idx_t nargs, duk_idx_t other) {
|
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|
|
duk_idx_t idx_func;
|
|
|
|
|
|
|
|
/* XXX: byte arithmetic? */
|
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|
|
|
|
|
|
DUK_ASSERT(other >= 0);
|
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|
|
|
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|
|
idx_func = duk_get_top(thr) - nargs - other;
|
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|
|
if (DUK_UNLIKELY((idx_func | nargs) < 0)) { /* idx_func < 0 || nargs < 0; OR sign bits */
|
|
|
|
DUK_ERROR_TYPE_INVALID_ARGS(thr);
|
|
|
|
DUK_WO_NORETURN(return 0;);
|
|
|
|
}
|
|
|
|
DUK_ASSERT(duk_is_valid_index(thr, idx_func));
|
|
|
|
return idx_func;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Compute idx_func, assume index will be valid. This is a valid assumption
|
|
|
|
* for protected calls: nargs < 0 is checked explicitly and duk_safe_call()
|
|
|
|
* validates the argument count.
|
|
|
|
*/
|
|
|
|
DUK_LOCAL duk_idx_t duk__call_get_idx_func_unvalidated(duk_hthread *thr, duk_idx_t nargs, duk_idx_t other) {
|
|
|
|
duk_idx_t idx_func;
|
|
|
|
|
|
|
|
/* XXX: byte arithmetic? */
|
|
|
|
|
|
|
|
DUK_ASSERT(nargs >= 0);
|
|
|
|
DUK_ASSERT(other >= 0);
|
|
|
|
|
|
|
|
idx_func = duk_get_top(thr) - nargs - other;
|
|
|
|
DUK_ASSERT(idx_func >= 0);
|
|
|
|
DUK_ASSERT(duk_is_valid_index(thr, idx_func));
|
|
|
|
return idx_func;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Prepare value stack for a method call through an object property.
|
|
|
|
* May currently throw an error e.g. when getting the property.
|
|
|
|
*/
|
|
|
|
DUK_LOCAL void duk__call_prop_prep_stack(duk_hthread *thr, duk_idx_t normalized_obj_idx, duk_idx_t nargs) {
|
|
|
|
DUK_CTX_ASSERT_VALID(thr);
|
|
|
|
DUK_ASSERT(nargs >= 0);
|
|
|
|
|
|
|
|
DUK_DDD(DUK_DDDPRINT("duk__call_prop_prep_stack, normalized_obj_idx=%ld, nargs=%ld, stacktop=%ld",
|
|
|
|
(long) normalized_obj_idx, (long) nargs, (long) duk_get_top(thr)));
|
|
|
|
|
|
|
|
/* [... key arg1 ... argN] */
|
|
|
|
|
|
|
|
/* duplicate key */
|
|
|
|
duk_dup(thr, -nargs - 1); /* Note: -nargs alone would fail for nargs == 0, this is OK */
|
|
|
|
(void) duk_get_prop(thr, normalized_obj_idx);
|
|
|
|
|
|
|
|
DUK_DDD(DUK_DDDPRINT("func: %!T", (duk_tval *) duk_get_tval(thr, -1)));
|
|
|
|
|
|
|
|
#if defined(DUK_USE_VERBOSE_ERRORS)
|
|
|
|
if (DUK_UNLIKELY(!duk_is_callable(thr, -1))) {
|
|
|
|
duk_tval *tv_base;
|
|
|
|
duk_tval *tv_key;
|
|
|
|
|
|
|
|
/* tv_targ is passed on stack top (at index -1). */
|
|
|
|
tv_base = DUK_GET_TVAL_POSIDX(thr, normalized_obj_idx);
|
|
|
|
tv_key = DUK_GET_TVAL_NEGIDX(thr, -nargs - 2);
|
|
|
|
DUK_ASSERT(tv_base >= thr->valstack_bottom && tv_base < thr->valstack_top);
|
|
|
|
DUK_ASSERT(tv_key >= thr->valstack_bottom && tv_key < thr->valstack_top);
|
|
|
|
|
|
|
|
duk_call_setup_propcall_error(thr, tv_base, tv_key);
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
|
|
|
|
/* [... key arg1 ... argN func] */
|
|
|
|
|
|
|
|
duk_replace(thr, -nargs - 2);
|
|
|
|
|
|
|
|
/* [... func arg1 ... argN] */
|
|
|
|
|
|
|
|
duk_dup(thr, normalized_obj_idx);
|
|
|
|
duk_insert(thr, -nargs - 1);
|
|
|
|
|
|
|
|
/* [... func this arg1 ... argN] */
|
|
|
|
}
|
|
|
|
|
|
|
|
DUK_EXTERNAL void duk_call(duk_hthread *thr, duk_idx_t nargs) {
|
|
|
|
duk_small_uint_t call_flags;
|
|
|
|
duk_idx_t idx_func;
|
|
|
|
|
|
|
|
DUK_ASSERT_API_ENTRY(thr);
|
|
|
|
|
|
|
|
idx_func = duk__call_get_idx_func(thr, nargs, 1);
|
|
|
|
DUK_ASSERT(duk_is_valid_index(thr, idx_func));
|
|
|
|
|
|
|
|
duk_insert_undefined(thr, idx_func + 1);
|
|
|
|
|
|
|
|
call_flags = 0; /* not protected, respect reclimit, not constructor */
|
|
|
|
duk_handle_call_unprotected(thr, idx_func, call_flags);
|
|
|
|
}
|
|
|
|
|
|
|
|
DUK_EXTERNAL void duk_call_method(duk_hthread *thr, duk_idx_t nargs) {
|
|
|
|
duk_small_uint_t call_flags;
|
|
|
|
duk_idx_t idx_func;
|
|
|
|
|
|
|
|
DUK_ASSERT_API_ENTRY(thr);
|
|
|
|
|
|
|
|
idx_func = duk__call_get_idx_func(thr, nargs, 2);
|
|
|
|
DUK_ASSERT(duk_is_valid_index(thr, idx_func));
|
|
|
|
|
|
|
|
call_flags = 0; /* not protected, respect reclimit, not constructor */
|
|
|
|
duk_handle_call_unprotected(thr, idx_func, call_flags);
|
|
|
|
}
|
|
|
|
|
|
|
|
DUK_EXTERNAL void duk_call_prop(duk_hthread *thr, duk_idx_t obj_idx, duk_idx_t nargs) {
|
|
|
|
/*
|
|
|
|
* XXX: if duk_handle_call() took values through indices, this could be
|
|
|
|
* made much more sensible. However, duk_handle_call() needs to fudge
|
|
|
|
* the 'this' and 'func' values to handle bound functions, which is now
|
|
|
|
* done "in-place", so this is not a trivial change.
|
|
|
|
*/
|
|
|
|
|
|
|
|
DUK_ASSERT_API_ENTRY(thr);
|
|
|
|
|
|
|
|
obj_idx = duk_require_normalize_index(thr, obj_idx); /* make absolute */
|
|
|
|
if (DUK_UNLIKELY(nargs < 0)) {
|
|
|
|
DUK_ERROR_TYPE_INVALID_ARGS(thr);
|
|
|
|
DUK_WO_NORETURN(return;);
|
|
|
|
}
|
|
|
|
|
|
|
|
duk__call_prop_prep_stack(thr, obj_idx, nargs);
|
|
|
|
|
|
|
|
duk_call_method(thr, nargs);
|
|
|
|
}
|
|
|
|
|
|
|
|
DUK_LOCAL duk_ret_t duk__pcall_raw(duk_hthread *thr, void *udata) {
|
|
|
|
duk__pcall_args *args;
|
|
|
|
duk_idx_t idx_func;
|
|
|
|
duk_int_t ret;
|
|
|
|
|
|
|
|
DUK_CTX_ASSERT_VALID(thr);
|
|
|
|
DUK_ASSERT(udata != NULL);
|
|
|
|
|
|
|
|
args = (duk__pcall_args *) udata;
|
|
|
|
idx_func = duk__call_get_idx_func_unvalidated(thr, args->nargs, 1);
|
|
|
|
DUK_ASSERT(duk_is_valid_index(thr, idx_func));
|
|
|
|
|
|
|
|
duk_insert_undefined(thr, idx_func + 1);
|
|
|
|
|
|
|
|
ret = duk_handle_call_unprotected(thr, idx_func, args->call_flags);
|
|
|
|
DUK_ASSERT(ret == 0);
|
|
|
|
DUK_UNREF(ret);
|
|
|
|
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
|
|
|
|
DUK_EXTERNAL duk_int_t duk_pcall(duk_hthread *thr, duk_idx_t nargs) {
|
|
|
|
duk__pcall_args args;
|
|
|
|
|
|
|
|
DUK_ASSERT_API_ENTRY(thr);
|
|
|
|
|
|
|
|
args.nargs = nargs;
|
|
|
|
if (DUK_UNLIKELY(nargs < 0)) {
|
|
|
|
DUK_ERROR_TYPE_INVALID_ARGS(thr);
|
|
|
|
DUK_WO_NORETURN(return DUK_EXEC_ERROR;);
|
|
|
|
}
|
|
|
|
args.call_flags = 0;
|
|
|
|
|
|
|
|
return duk_safe_call(thr, duk__pcall_raw, (void *) &args /*udata*/, nargs + 1 /*nargs*/, 1 /*nrets*/);
|
|
|
|
}
|
|
|
|
|
|
|
|
DUK_LOCAL duk_ret_t duk__pcall_method_raw(duk_hthread *thr, void *udata) {
|
|
|
|
duk__pcall_method_args *args;
|
|
|
|
duk_idx_t idx_func;
|
|
|
|
duk_int_t ret;
|
|
|
|
|
|
|
|
DUK_CTX_ASSERT_VALID(thr);
|
|
|
|
DUK_ASSERT(udata != NULL);
|
|
|
|
|
|
|
|
args = (duk__pcall_method_args *) udata;
|
|
|
|
|
|
|
|
idx_func = duk__call_get_idx_func_unvalidated(thr, args->nargs, 2);
|
|
|
|
DUK_ASSERT(duk_is_valid_index(thr, idx_func));
|
|
|
|
|
|
|
|
ret = duk_handle_call_unprotected(thr, idx_func, args->call_flags);
|
|
|
|
DUK_ASSERT(ret == 0);
|
|
|
|
DUK_UNREF(ret);
|
|
|
|
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
|
|
|
|
DUK_INTERNAL duk_int_t duk_pcall_method_flags(duk_hthread *thr, duk_idx_t nargs, duk_small_uint_t call_flags) {
|
|
|
|
duk__pcall_method_args args;
|
|
|
|
|
|
|
|
DUK_ASSERT_API_ENTRY(thr);
|
|
|
|
|
|
|
|
args.nargs = nargs;
|
|
|
|
if (DUK_UNLIKELY(nargs < 0)) {
|
|
|
|
DUK_ERROR_TYPE_INVALID_ARGS(thr);
|
|
|
|
DUK_WO_NORETURN(return DUK_EXEC_ERROR;);
|
|
|
|
}
|
|
|
|
args.call_flags = call_flags;
|
|
|
|
|
|
|
|
return duk_safe_call(thr, duk__pcall_method_raw, (void *) &args /*udata*/, nargs + 2 /*nargs*/, 1 /*nrets*/);
|
|
|
|
}
|
|
|
|
|
|
|
|
DUK_EXTERNAL duk_int_t duk_pcall_method(duk_hthread *thr, duk_idx_t nargs) {
|
|
|
|
DUK_ASSERT_API_ENTRY(thr);
|
|
|
|
|
|
|
|
return duk_pcall_method_flags(thr, nargs, 0);
|
|
|
|
}
|
|
|
|
|
|
|
|
DUK_LOCAL duk_ret_t duk__pcall_prop_raw(duk_hthread *thr, void *udata) {
|
|
|
|
duk__pcall_prop_args *args;
|
|
|
|
duk_idx_t obj_idx;
|
|
|
|
duk_int_t ret;
|
|
|
|
|
|
|
|
DUK_CTX_ASSERT_VALID(thr);
|
|
|
|
DUK_ASSERT(udata != NULL);
|
|
|
|
|
|
|
|
args = (duk__pcall_prop_args *) udata;
|
|
|
|
|
|
|
|
obj_idx = duk_require_normalize_index(thr, args->obj_idx); /* make absolute */
|
|
|
|
duk__call_prop_prep_stack(thr, obj_idx, args->nargs);
|
|
|
|
|
|
|
|
ret = duk_handle_call_unprotected_nargs(thr, args->nargs, args->call_flags);
|
|
|
|
DUK_ASSERT(ret == 0);
|
|
|
|
DUK_UNREF(ret);
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
|
|
|
|
DUK_EXTERNAL duk_int_t duk_pcall_prop(duk_hthread *thr, duk_idx_t obj_idx, duk_idx_t nargs) {
|
|
|
|
duk__pcall_prop_args args;
|
|
|
|
|
|
|
|
DUK_ASSERT_API_ENTRY(thr);
|
|
|
|
|
|
|
|
args.obj_idx = obj_idx;
|
|
|
|
args.nargs = nargs;
|
|
|
|
if (DUK_UNLIKELY(nargs < 0)) {
|
|
|
|
DUK_ERROR_TYPE_INVALID_ARGS(thr);
|
|
|
|
DUK_WO_NORETURN(return DUK_EXEC_ERROR;);
|
|
|
|
}
|
|
|
|
args.call_flags = 0;
|
|
|
|
|
|
|
|
return duk_safe_call(thr, duk__pcall_prop_raw, (void *) &args /*udata*/, nargs + 1 /*nargs*/, 1 /*nrets*/);
|
|
|
|
}
|
|
|
|
|
|
|
|
DUK_EXTERNAL duk_int_t duk_safe_call(duk_hthread *thr, duk_safe_call_function func, void *udata, duk_idx_t nargs, duk_idx_t nrets) {
|
|
|
|
duk_int_t rc;
|
|
|
|
|
|
|
|
DUK_ASSERT_API_ENTRY(thr);
|
|
|
|
|
|
|
|
/* nargs condition; fail if: top - bottom < nargs
|
|
|
|
* <=> top < bottom + nargs
|
|
|
|
* nrets condition; fail if: end - (top - nargs) < nrets
|
|
|
|
* <=> end - top + nargs < nrets
|
|
|
|
* <=> end + nargs < top + nrets
|
|
|
|
*/
|
|
|
|
/* XXX: check for any reserve? */
|
|
|
|
|
|
|
|
if (DUK_UNLIKELY((nargs | nrets) < 0 || /* nargs < 0 || nrets < 0; OR sign bits */
|
|
|
|
thr->valstack_top < thr->valstack_bottom + nargs || /* nargs too large compared to top */
|
|
|
|
thr->valstack_end + nargs < thr->valstack_top + nrets)) { /* nrets too large compared to reserve */
|
|
|
|
DUK_D(DUK_DPRINT("not enough stack reserve for safe call or invalid arguments: "
|
|
|
|
"nargs=%ld < 0 (?), nrets=%ld < 0 (?), top=%ld < bottom=%ld + nargs=%ld (?), "
|
|
|
|
"end=%ld + nargs=%ld < top=%ld + nrets=%ld (?)",
|
|
|
|
(long) nargs,
|
|
|
|
(long) nrets,
|
|
|
|
(long) (thr->valstack_top - thr->valstack),
|
|
|
|
(long) (thr->valstack_bottom - thr->valstack),
|
|
|
|
(long) nargs,
|
|
|
|
(long) (thr->valstack_end - thr->valstack),
|
|
|
|
(long) nargs,
|
|
|
|
(long) (thr->valstack_top - thr->valstack),
|
|
|
|
(long) nrets));
|
|
|
|
DUK_ERROR_TYPE_INVALID_ARGS(thr);
|
|
|
|
DUK_WO_NORETURN(return DUK_EXEC_ERROR;);
|
|
|
|
}
|
|
|
|
|
|
|
|
rc = duk_handle_safe_call(thr, /* thread */
|
|
|
|
func, /* func */
|
|
|
|
udata, /* udata */
|
|
|
|
nargs, /* num_stack_args */
|
|
|
|
nrets); /* num_stack_res */
|
|
|
|
|
|
|
|
return rc;
|
|
|
|
}
|
|
|
|
|
|
|
|
DUK_EXTERNAL void duk_new(duk_hthread *thr, duk_idx_t nargs) {
|
|
|
|
duk_idx_t idx_func;
|
|
|
|
|
|
|
|
DUK_ASSERT_API_ENTRY(thr);
|
|
|
|
|
|
|
|
idx_func = duk__call_get_idx_func(thr, nargs, 1);
|
|
|
|
DUK_ASSERT(duk_is_valid_index(thr, idx_func));
|
|
|
|
|
|
|
|
duk_push_object(thr); /* default instance; internal proto updated by call handling */
|
|
|
|
duk_insert(thr, idx_func + 1);
|
|
|
|
|
|
|
|
duk_handle_call_unprotected(thr, idx_func, DUK_CALL_FLAG_CONSTRUCT);
|
|
|
|
}
|
|
|
|
|
|
|
|
DUK_LOCAL duk_ret_t duk__pnew_helper(duk_hthread *thr, void *udata) {
|
|
|
|
duk_idx_t nargs;
|
|
|
|
|
|
|
|
DUK_ASSERT(udata != NULL);
|
|
|
|
nargs = *((duk_idx_t *) udata);
|
|
|
|
|
|
|
|
duk_new(thr, nargs);
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
|
|
|
|
DUK_EXTERNAL duk_int_t duk_pnew(duk_hthread *thr, duk_idx_t nargs) {
|
|
|
|
duk_int_t rc;
|
|
|
|
|
|
|
|
DUK_ASSERT_API_ENTRY(thr);
|
|
|
|
|
|
|
|
/* For now, just use duk_safe_call() to wrap duk_new(). We can't
|
|
|
|
* simply use a protected duk_handle_call() because pushing the
|
|
|
|
* default instance might throw.
|
|
|
|
*/
|
|
|
|
|
|
|
|
if (DUK_UNLIKELY(nargs < 0)) {
|
|
|
|
DUK_ERROR_TYPE_INVALID_ARGS(thr);
|
|
|
|
DUK_WO_NORETURN(return DUK_EXEC_ERROR;);
|
|
|
|
}
|
|
|
|
|
|
|
|
rc = duk_safe_call(thr, duk__pnew_helper, (void *) &nargs /*udata*/, nargs + 1 /*nargs*/, 1 /*nrets*/);
|
|
|
|
return rc;
|
|
|
|
}
|
|
|
|
|
|
|
|
DUK_EXTERNAL duk_bool_t duk_is_constructor_call(duk_hthread *thr) {
|
|
|
|
duk_activation *act;
|
|
|
|
|
|
|
|
DUK_ASSERT_API_ENTRY(thr);
|
|
|
|
|
|
|
|
act = thr->callstack_curr;
|
|
|
|
if (act != NULL) {
|
|
|
|
return ((act->flags & DUK_ACT_FLAG_CONSTRUCT) != 0 ? 1 : 0);
|
|
|
|
}
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
DUK_EXTERNAL void duk_require_constructor_call(duk_hthread *thr) {
|
|
|
|
DUK_ASSERT_API_ENTRY(thr);
|
|
|
|
|
|
|
|
if (!duk_is_constructor_call(thr)) {
|
|
|
|
DUK_ERROR_TYPE(thr, DUK_STR_CONSTRUCT_ONLY);
|
|
|
|
DUK_WO_NORETURN(return;);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
DUK_EXTERNAL duk_bool_t duk_is_strict_call(duk_hthread *thr) {
|
|
|
|
duk_activation *act;
|
|
|
|
|
|
|
|
/* For user code this could just return 1 (strict) always
|
|
|
|
* because all Duktape/C functions are considered strict,
|
|
|
|
* and strict is also the default when nothing is running.
|
|
|
|
* However, Duktape may call this function internally when
|
|
|
|
* the current activation is an ECMAScript function, so
|
|
|
|
* this cannot be replaced by a 'return 1' without fixing
|
|
|
|
* the internal call sites.
|
|
|
|
*/
|
|
|
|
|
|
|
|
DUK_ASSERT_API_ENTRY(thr);
|
|
|
|
|
|
|
|
act = thr->callstack_curr;
|
|
|
|
if (act != NULL) {
|
|
|
|
return ((act->flags & DUK_ACT_FLAG_STRICT) != 0 ? 1 : 0);
|
|
|
|
} else {
|
|
|
|
/* Strict by default. */
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Duktape/C function magic
|
|
|
|
*/
|
|
|
|
|
|
|
|
DUK_EXTERNAL duk_int_t duk_get_current_magic(duk_hthread *thr) {
|
|
|
|
duk_activation *act;
|
|
|
|
duk_hobject *func;
|
|
|
|
|
|
|
|
DUK_ASSERT_API_ENTRY(thr);
|
|
|
|
|
|
|
|
act = thr->callstack_curr;
|
|
|
|
if (act) {
|
First round of lightfunc changes
A lot of changes to add preliminary lightfunc support:
* Add LIGHTFUNC tagged type to duk_tval.h and API.
* Internal changes for preliminary to support lightfuncs in call handling
and other operations (FIXMEs left in obvious places where support is
still missing after this commit)
* Preliminary Ecmascript and API testcases for lightfuncs
Detailed notes:
* Because magic is signed, reading it back involves sign extension which is
quite verbose to do in C. Use macros for reading the magic value and other
bit fields encoded in the flags.
* Function.prototype.bind(): the 'length' property of a bound function now
comes out wrong. We could simply look up the virtual 'length' property
even if h_target is NULL: no extra code and binding is relatively rare in
hot paths. Rewrite more cleanly in any case.
* The use flag DUK_USE_LIGHTFUNC_BUILTINS controls the forced lightfunc
conversion of built-ins. This results in non-compliant built-ins but
significant memory savings in very memory poor environments.
* Reject eval(), Thread.yield/resume as lightfuncs. These functions have
current assertions that they must be called as fully fledged functions.
* Lightfuncs are serialized like ordinary functions for JSON, JX, and JC
by this diff.
* Add 'magic' to activation for lightfuncs. It will be needed for lightweight
functions: we don't have the duk_tval related to the lightfunc, so we must
copy the magic value to the activation when a call is made.
* When lightfuncs are used as property lookup base values, continue property
lookup from the Function.prototype object. This is necessary to allow e.g.
``func.call()`` and ``func.apply()`` to be used.
* Call handling had to be reworked for lightfuncs, especially how bound
function chains are handled. This is a relatively large change but is
necessary to support lightweight functions properly in bound function
resolution.
The current solution is not ideal. The bytecode executor will first try an
ecma-to-ecma call setup which resolves the bound function chain first. If
the final, unbound function is not viable (a native function) the call setup
returns with an error code. The caller will then perform a normal call.
Although bound function resolution has already been done, the normal call
handling code will re-do it (and detect there is nothing to do).
This situation could be avoided by decoupling bound function handling and
effective this binding computation from the actual call setup. The caller
could then to do this prestep first, and only then decide whether to use an
ecma-to-ecma call or an ordinary heavyweight call.
Remove duk__find_nonbound_function as unused.
* Use indirect magic to allow LIGHTFUNCs for Date. Most of the built-in
functions not directly eligible as lightfuncs are the Date built-in methods,
whose magic values contain too much information to fit into the 8-bit magic
of a LIGHTFUNC value.
To work around this, add an array (duk__date_magics[]) containing the
actual control flags needed by the built-ins, and make the Date built-in
magic value an index into this table. With this change Date built-ins are
successfully converted to lightfuncs.
Testcase fixes:
- Whitespace fixes
- Print error for indirect eval error to make diagnosis easier
- Fix error string to match errmsg updated in this branch
11 years ago
|
|
|
func = DUK_ACT_GET_FUNC(act);
|
|
|
|
if (!func) {
|
|
|
|
duk_tval *tv = &act->tv_func;
|
|
|
|
duk_small_uint_t lf_flags;
|
|
|
|
lf_flags = DUK_TVAL_GET_LIGHTFUNC_FLAGS(tv);
|
|
|
|
return (duk_int_t) DUK_LFUNC_FLAGS_GET_MAGIC(lf_flags);
|
|
|
|
}
|
|
|
|
DUK_ASSERT(func != NULL);
|
|
|
|
|
|
|
|
if (DUK_HOBJECT_IS_NATFUNC(func)) {
|
|
|
|
duk_hnatfunc *nf = (duk_hnatfunc *) func;
|
|
|
|
return (duk_int_t) nf->magic;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
DUK_EXTERNAL duk_int_t duk_get_magic(duk_hthread *thr, duk_idx_t idx) {
|
First round of lightfunc changes
A lot of changes to add preliminary lightfunc support:
* Add LIGHTFUNC tagged type to duk_tval.h and API.
* Internal changes for preliminary to support lightfuncs in call handling
and other operations (FIXMEs left in obvious places where support is
still missing after this commit)
* Preliminary Ecmascript and API testcases for lightfuncs
Detailed notes:
* Because magic is signed, reading it back involves sign extension which is
quite verbose to do in C. Use macros for reading the magic value and other
bit fields encoded in the flags.
* Function.prototype.bind(): the 'length' property of a bound function now
comes out wrong. We could simply look up the virtual 'length' property
even if h_target is NULL: no extra code and binding is relatively rare in
hot paths. Rewrite more cleanly in any case.
* The use flag DUK_USE_LIGHTFUNC_BUILTINS controls the forced lightfunc
conversion of built-ins. This results in non-compliant built-ins but
significant memory savings in very memory poor environments.
* Reject eval(), Thread.yield/resume as lightfuncs. These functions have
current assertions that they must be called as fully fledged functions.
* Lightfuncs are serialized like ordinary functions for JSON, JX, and JC
by this diff.
* Add 'magic' to activation for lightfuncs. It will be needed for lightweight
functions: we don't have the duk_tval related to the lightfunc, so we must
copy the magic value to the activation when a call is made.
* When lightfuncs are used as property lookup base values, continue property
lookup from the Function.prototype object. This is necessary to allow e.g.
``func.call()`` and ``func.apply()`` to be used.
* Call handling had to be reworked for lightfuncs, especially how bound
function chains are handled. This is a relatively large change but is
necessary to support lightweight functions properly in bound function
resolution.
The current solution is not ideal. The bytecode executor will first try an
ecma-to-ecma call setup which resolves the bound function chain first. If
the final, unbound function is not viable (a native function) the call setup
returns with an error code. The caller will then perform a normal call.
Although bound function resolution has already been done, the normal call
handling code will re-do it (and detect there is nothing to do).
This situation could be avoided by decoupling bound function handling and
effective this binding computation from the actual call setup. The caller
could then to do this prestep first, and only then decide whether to use an
ecma-to-ecma call or an ordinary heavyweight call.
Remove duk__find_nonbound_function as unused.
* Use indirect magic to allow LIGHTFUNCs for Date. Most of the built-in
functions not directly eligible as lightfuncs are the Date built-in methods,
whose magic values contain too much information to fit into the 8-bit magic
of a LIGHTFUNC value.
To work around this, add an array (duk__date_magics[]) containing the
actual control flags needed by the built-ins, and make the Date built-in
magic value an index into this table. With this change Date built-ins are
successfully converted to lightfuncs.
Testcase fixes:
- Whitespace fixes
- Print error for indirect eval error to make diagnosis easier
- Fix error string to match errmsg updated in this branch
11 years ago
|
|
|
duk_tval *tv;
|
|
|
|
duk_hobject *h;
|
|
|
|
|
|
|
|
DUK_ASSERT_API_ENTRY(thr);
|
|
|
|
|
|
|
|
tv = duk_require_tval(thr, idx);
|
First round of lightfunc changes
A lot of changes to add preliminary lightfunc support:
* Add LIGHTFUNC tagged type to duk_tval.h and API.
* Internal changes for preliminary to support lightfuncs in call handling
and other operations (FIXMEs left in obvious places where support is
still missing after this commit)
* Preliminary Ecmascript and API testcases for lightfuncs
Detailed notes:
* Because magic is signed, reading it back involves sign extension which is
quite verbose to do in C. Use macros for reading the magic value and other
bit fields encoded in the flags.
* Function.prototype.bind(): the 'length' property of a bound function now
comes out wrong. We could simply look up the virtual 'length' property
even if h_target is NULL: no extra code and binding is relatively rare in
hot paths. Rewrite more cleanly in any case.
* The use flag DUK_USE_LIGHTFUNC_BUILTINS controls the forced lightfunc
conversion of built-ins. This results in non-compliant built-ins but
significant memory savings in very memory poor environments.
* Reject eval(), Thread.yield/resume as lightfuncs. These functions have
current assertions that they must be called as fully fledged functions.
* Lightfuncs are serialized like ordinary functions for JSON, JX, and JC
by this diff.
* Add 'magic' to activation for lightfuncs. It will be needed for lightweight
functions: we don't have the duk_tval related to the lightfunc, so we must
copy the magic value to the activation when a call is made.
* When lightfuncs are used as property lookup base values, continue property
lookup from the Function.prototype object. This is necessary to allow e.g.
``func.call()`` and ``func.apply()`` to be used.
* Call handling had to be reworked for lightfuncs, especially how bound
function chains are handled. This is a relatively large change but is
necessary to support lightweight functions properly in bound function
resolution.
The current solution is not ideal. The bytecode executor will first try an
ecma-to-ecma call setup which resolves the bound function chain first. If
the final, unbound function is not viable (a native function) the call setup
returns with an error code. The caller will then perform a normal call.
Although bound function resolution has already been done, the normal call
handling code will re-do it (and detect there is nothing to do).
This situation could be avoided by decoupling bound function handling and
effective this binding computation from the actual call setup. The caller
could then to do this prestep first, and only then decide whether to use an
ecma-to-ecma call or an ordinary heavyweight call.
Remove duk__find_nonbound_function as unused.
* Use indirect magic to allow LIGHTFUNCs for Date. Most of the built-in
functions not directly eligible as lightfuncs are the Date built-in methods,
whose magic values contain too much information to fit into the 8-bit magic
of a LIGHTFUNC value.
To work around this, add an array (duk__date_magics[]) containing the
actual control flags needed by the built-ins, and make the Date built-in
magic value an index into this table. With this change Date built-ins are
successfully converted to lightfuncs.
Testcase fixes:
- Whitespace fixes
- Print error for indirect eval error to make diagnosis easier
- Fix error string to match errmsg updated in this branch
11 years ago
|
|
|
if (DUK_TVAL_IS_OBJECT(tv)) {
|
|
|
|
h = DUK_TVAL_GET_OBJECT(tv);
|
|
|
|
DUK_ASSERT(h != NULL);
|
|
|
|
if (!DUK_HOBJECT_HAS_NATFUNC(h)) {
|
First round of lightfunc changes
A lot of changes to add preliminary lightfunc support:
* Add LIGHTFUNC tagged type to duk_tval.h and API.
* Internal changes for preliminary to support lightfuncs in call handling
and other operations (FIXMEs left in obvious places where support is
still missing after this commit)
* Preliminary Ecmascript and API testcases for lightfuncs
Detailed notes:
* Because magic is signed, reading it back involves sign extension which is
quite verbose to do in C. Use macros for reading the magic value and other
bit fields encoded in the flags.
* Function.prototype.bind(): the 'length' property of a bound function now
comes out wrong. We could simply look up the virtual 'length' property
even if h_target is NULL: no extra code and binding is relatively rare in
hot paths. Rewrite more cleanly in any case.
* The use flag DUK_USE_LIGHTFUNC_BUILTINS controls the forced lightfunc
conversion of built-ins. This results in non-compliant built-ins but
significant memory savings in very memory poor environments.
* Reject eval(), Thread.yield/resume as lightfuncs. These functions have
current assertions that they must be called as fully fledged functions.
* Lightfuncs are serialized like ordinary functions for JSON, JX, and JC
by this diff.
* Add 'magic' to activation for lightfuncs. It will be needed for lightweight
functions: we don't have the duk_tval related to the lightfunc, so we must
copy the magic value to the activation when a call is made.
* When lightfuncs are used as property lookup base values, continue property
lookup from the Function.prototype object. This is necessary to allow e.g.
``func.call()`` and ``func.apply()`` to be used.
* Call handling had to be reworked for lightfuncs, especially how bound
function chains are handled. This is a relatively large change but is
necessary to support lightweight functions properly in bound function
resolution.
The current solution is not ideal. The bytecode executor will first try an
ecma-to-ecma call setup which resolves the bound function chain first. If
the final, unbound function is not viable (a native function) the call setup
returns with an error code. The caller will then perform a normal call.
Although bound function resolution has already been done, the normal call
handling code will re-do it (and detect there is nothing to do).
This situation could be avoided by decoupling bound function handling and
effective this binding computation from the actual call setup. The caller
could then to do this prestep first, and only then decide whether to use an
ecma-to-ecma call or an ordinary heavyweight call.
Remove duk__find_nonbound_function as unused.
* Use indirect magic to allow LIGHTFUNCs for Date. Most of the built-in
functions not directly eligible as lightfuncs are the Date built-in methods,
whose magic values contain too much information to fit into the 8-bit magic
of a LIGHTFUNC value.
To work around this, add an array (duk__date_magics[]) containing the
actual control flags needed by the built-ins, and make the Date built-in
magic value an index into this table. With this change Date built-ins are
successfully converted to lightfuncs.
Testcase fixes:
- Whitespace fixes
- Print error for indirect eval error to make diagnosis easier
- Fix error string to match errmsg updated in this branch
11 years ago
|
|
|
goto type_error;
|
|
|
|
}
|
|
|
|
return (duk_int_t) ((duk_hnatfunc *) h)->magic;
|
First round of lightfunc changes
A lot of changes to add preliminary lightfunc support:
* Add LIGHTFUNC tagged type to duk_tval.h and API.
* Internal changes for preliminary to support lightfuncs in call handling
and other operations (FIXMEs left in obvious places where support is
still missing after this commit)
* Preliminary Ecmascript and API testcases for lightfuncs
Detailed notes:
* Because magic is signed, reading it back involves sign extension which is
quite verbose to do in C. Use macros for reading the magic value and other
bit fields encoded in the flags.
* Function.prototype.bind(): the 'length' property of a bound function now
comes out wrong. We could simply look up the virtual 'length' property
even if h_target is NULL: no extra code and binding is relatively rare in
hot paths. Rewrite more cleanly in any case.
* The use flag DUK_USE_LIGHTFUNC_BUILTINS controls the forced lightfunc
conversion of built-ins. This results in non-compliant built-ins but
significant memory savings in very memory poor environments.
* Reject eval(), Thread.yield/resume as lightfuncs. These functions have
current assertions that they must be called as fully fledged functions.
* Lightfuncs are serialized like ordinary functions for JSON, JX, and JC
by this diff.
* Add 'magic' to activation for lightfuncs. It will be needed for lightweight
functions: we don't have the duk_tval related to the lightfunc, so we must
copy the magic value to the activation when a call is made.
* When lightfuncs are used as property lookup base values, continue property
lookup from the Function.prototype object. This is necessary to allow e.g.
``func.call()`` and ``func.apply()`` to be used.
* Call handling had to be reworked for lightfuncs, especially how bound
function chains are handled. This is a relatively large change but is
necessary to support lightweight functions properly in bound function
resolution.
The current solution is not ideal. The bytecode executor will first try an
ecma-to-ecma call setup which resolves the bound function chain first. If
the final, unbound function is not viable (a native function) the call setup
returns with an error code. The caller will then perform a normal call.
Although bound function resolution has already been done, the normal call
handling code will re-do it (and detect there is nothing to do).
This situation could be avoided by decoupling bound function handling and
effective this binding computation from the actual call setup. The caller
could then to do this prestep first, and only then decide whether to use an
ecma-to-ecma call or an ordinary heavyweight call.
Remove duk__find_nonbound_function as unused.
* Use indirect magic to allow LIGHTFUNCs for Date. Most of the built-in
functions not directly eligible as lightfuncs are the Date built-in methods,
whose magic values contain too much information to fit into the 8-bit magic
of a LIGHTFUNC value.
To work around this, add an array (duk__date_magics[]) containing the
actual control flags needed by the built-ins, and make the Date built-in
magic value an index into this table. With this change Date built-ins are
successfully converted to lightfuncs.
Testcase fixes:
- Whitespace fixes
- Print error for indirect eval error to make diagnosis easier
- Fix error string to match errmsg updated in this branch
11 years ago
|
|
|
} else if (DUK_TVAL_IS_LIGHTFUNC(tv)) {
|
|
|
|
duk_small_uint_t lf_flags = DUK_TVAL_GET_LIGHTFUNC_FLAGS(tv);
|
|
|
|
return (duk_int_t) DUK_LFUNC_FLAGS_GET_MAGIC(lf_flags);
|
First round of lightfunc changes
A lot of changes to add preliminary lightfunc support:
* Add LIGHTFUNC tagged type to duk_tval.h and API.
* Internal changes for preliminary to support lightfuncs in call handling
and other operations (FIXMEs left in obvious places where support is
still missing after this commit)
* Preliminary Ecmascript and API testcases for lightfuncs
Detailed notes:
* Because magic is signed, reading it back involves sign extension which is
quite verbose to do in C. Use macros for reading the magic value and other
bit fields encoded in the flags.
* Function.prototype.bind(): the 'length' property of a bound function now
comes out wrong. We could simply look up the virtual 'length' property
even if h_target is NULL: no extra code and binding is relatively rare in
hot paths. Rewrite more cleanly in any case.
* The use flag DUK_USE_LIGHTFUNC_BUILTINS controls the forced lightfunc
conversion of built-ins. This results in non-compliant built-ins but
significant memory savings in very memory poor environments.
* Reject eval(), Thread.yield/resume as lightfuncs. These functions have
current assertions that they must be called as fully fledged functions.
* Lightfuncs are serialized like ordinary functions for JSON, JX, and JC
by this diff.
* Add 'magic' to activation for lightfuncs. It will be needed for lightweight
functions: we don't have the duk_tval related to the lightfunc, so we must
copy the magic value to the activation when a call is made.
* When lightfuncs are used as property lookup base values, continue property
lookup from the Function.prototype object. This is necessary to allow e.g.
``func.call()`` and ``func.apply()`` to be used.
* Call handling had to be reworked for lightfuncs, especially how bound
function chains are handled. This is a relatively large change but is
necessary to support lightweight functions properly in bound function
resolution.
The current solution is not ideal. The bytecode executor will first try an
ecma-to-ecma call setup which resolves the bound function chain first. If
the final, unbound function is not viable (a native function) the call setup
returns with an error code. The caller will then perform a normal call.
Although bound function resolution has already been done, the normal call
handling code will re-do it (and detect there is nothing to do).
This situation could be avoided by decoupling bound function handling and
effective this binding computation from the actual call setup. The caller
could then to do this prestep first, and only then decide whether to use an
ecma-to-ecma call or an ordinary heavyweight call.
Remove duk__find_nonbound_function as unused.
* Use indirect magic to allow LIGHTFUNCs for Date. Most of the built-in
functions not directly eligible as lightfuncs are the Date built-in methods,
whose magic values contain too much information to fit into the 8-bit magic
of a LIGHTFUNC value.
To work around this, add an array (duk__date_magics[]) containing the
actual control flags needed by the built-ins, and make the Date built-in
magic value an index into this table. With this change Date built-ins are
successfully converted to lightfuncs.
Testcase fixes:
- Whitespace fixes
- Print error for indirect eval error to make diagnosis easier
- Fix error string to match errmsg updated in this branch
11 years ago
|
|
|
}
|
|
|
|
|
|
|
|
/* fall through */
|
|
|
|
type_error:
|
|
|
|
DUK_ERROR_TYPE(thr, DUK_STR_UNEXPECTED_TYPE);
|
|
|
|
DUK_WO_NORETURN(return 0;);
|
|
|
|
}
|
|
|
|
|
|
|
|
DUK_EXTERNAL void duk_set_magic(duk_hthread *thr, duk_idx_t idx, duk_int_t magic) {
|
|
|
|
duk_hnatfunc *nf;
|
|
|
|
|
|
|
|
DUK_ASSERT_API_ENTRY(thr);
|
|
|
|
|
|
|
|
nf = duk_require_hnatfunc(thr, idx);
|
|
|
|
DUK_ASSERT(nf != NULL);
|
|
|
|
nf->magic = (duk_int16_t) magic;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Misc helpers
|
|
|
|
*/
|
|
|
|
|
|
|
|
/* Resolve a bound function on value stack top to a non-bound target
|
|
|
|
* (leave other values as is).
|
|
|
|
*/
|
|
|
|
DUK_INTERNAL void duk_resolve_nonbound_function(duk_hthread *thr) {
|
|
|
|
duk_tval *tv;
|
|
|
|
|
|
|
|
DUK_HTHREAD_ASSERT_VALID(thr);
|
|
|
|
|
|
|
|
tv = DUK_GET_TVAL_NEGIDX(thr, -1);
|
|
|
|
if (DUK_TVAL_IS_OBJECT(tv)) {
|
|
|
|
duk_hobject *h;
|
|
|
|
|
|
|
|
h = DUK_TVAL_GET_OBJECT(tv);
|
|
|
|
DUK_ASSERT(h != NULL);
|
|
|
|
if (DUK_HOBJECT_HAS_BOUNDFUNC(h)) {
|
|
|
|
duk_push_tval(thr, &((duk_hboundfunc *) (void *) h)->target);
|
|
|
|
duk_replace(thr, -2);
|
|
|
|
#if 0
|
|
|
|
DUK_TVAL_SET_TVAL(tv, &((duk_hboundfunc *) h)->target);
|
|
|
|
DUK_TVAL_INCREF(thr, tv);
|
|
|
|
DUK_HOBJECT_DECREF_NORZ(thr, h);
|
|
|
|
#endif
|
|
|
|
/* Rely on Function.prototype.bind() on never creating a bound
|
|
|
|
* function whose target is not proper. This is now safe
|
|
|
|
* because the target is not even an internal property but a
|
|
|
|
* struct member.
|
|
|
|
*/
|
|
|
|
DUK_ASSERT(duk_is_lightfunc(thr, -1) || duk_is_callable(thr, -1));
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Lightfuncs cannot be bound but are always callable and
|
|
|
|
* constructable.
|
|
|
|
*/
|
|
|
|
}
|