Fix crash in UTF8ToString with resizable ArrayBuffers#27242
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This fixes a crash in
UTF8ToString(and related functions) that occurs when the heap is backed by a resizableArrayBuffer. TheTextDecoder.decode()API throws aTypeErrorwhen passed a view of a resizableArrayBuffer, which previously caused a crash in builds withALLOW_MEMORY_GROWTHandGROWABLE_ARRAYBUFFERSenabled.The
getUnsharedTextDecoderViewfunction insrc/parseTools.mjsis updated to detect when the heap might be resizable and generate code that copies the data using.slice()if the buffer is resizable, ensuringTextDecoderonly receives non-resizable views. A test is added to verify this behavior by emulating the browser's strictTextDecoderimplementation.Closes #27241