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Read byteOffset for detached buffers

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The spec [1] expects to read `byteOffset` even for detached buffers.

Noticed a new test262 test [2] failed and there an an existing one we skipped
as well for the same reason.

[1] https://tc39.es/ecma262/#sec-%typedarray%.prototype.subarray
[2] https://github.com/tc39/test262/blob/main/test/built-ins/TypedArray/prototype/subarray/byteoffset-with-detached-buffer.js

Fix: https://github.com/bellard/quickjs/issues/417
This commit is contained in:
Nick Vatamaniuc
2025-06-07 00:42:50 -04:00
parent 638ec8ca5e
commit 00b1d8d0b2
2 changed files with 5 additions and 7 deletions
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11
quickjs.c
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@@ -54017,7 +54017,8 @@ static JSValue js_typed_array_subarray(JSContext *ctx, JSValueConst this_val,
int argc, JSValueConst *argv)
{
JSValueConst args[4];
JSValue arr, byteOffset, ta_buffer;
JSValue arr, ta_buffer;
JSTypedArray *ta;
JSObject *p;
int len, start, final, count, shift, offset;
@@ -54034,12 +54035,10 @@ static JSValue js_typed_array_subarray(JSContext *ctx, JSValueConst this_val,
goto exception;
}
count = max_int(final - start, 0);
byteOffset = js_typed_array_get_byteOffset(ctx, this_val, 0);
if (JS_IsException(byteOffset))
goto exception;
shift = typed_array_size_log2(p->class_id);
offset = JS_VALUE_GET_INT(byteOffset) + (start << shift);
JS_FreeValue(ctx, byteOffset);
ta = p->u.typed_array;
/* Read byteOffset (ta->offset) even if detached */
offset = ta->offset + (start << shift);
ta_buffer = js_typed_array_get_buffer(ctx, this_val, 0);
if (JS_IsException(ta_buffer))
goto exception;