pyocd / pyocd/pyOCD

tcp_client sends non-conformant JSON

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Python
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Description

In the transaction I see:
{"id": 11, "request": "swj_sequence", "arguments": [51, 72057594037927935]}

That's a bug waiting to happen. 72057594037927935 is larger than 9007199254740991 (aka Number.MAX_SAFE_INTEGER).

The protocol probably needs to have these kinds of integers (which are actually bitstrings anyway) converted to hex strings and have a protocol version bump.

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Research direction

Start by tracing tcp_client's JSON serialization for the shown swj_sequence transaction and review how the protocol represents large integers. Determine the intended hex-string representation and protocol-version impact before changing behavior; done means the transaction is conformant for values above Number.MAX_SAFE_INTEGER and the versioning is agreed and covered.

Written by the indexing model from the issue text.

Assessment

Tech stack
python
Domain
embedded-iot
Issue type
Bug
Difficulty
5/5
Estimated time
Over a week
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
25/100

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