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sendfile() and splice() into a file that is mapped MAP_SHARED change what the mappings read, but replay doesn't update the emulated file that backs them, so reads through the mappings diverge. Notify the file's MmappedFileMonitor, which records the written part of each mapping as it does for write(), with the output offset in the trace. Test: mmap_shared_sendfile Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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[patch/test by AI]
sendfile() and splice() into a file that is mapped MAP_SHARED change what the mappings read, but replay doesn't update the emulated file that backs them, so reads through the mappings diverge. Notify the file's MmappedFileMonitor, which records the written part of each mapping as it does for write(), with the output offset in the trace.
Test: mmap_shared_sendfile