arosien commented on issue #844:
URL:
https://github.com/apache/daffodil-vscode/issues/844#issuecomment-1885845304
FYI the DAP protocol sequence looks like this:
- breakpoint hit
- extension request `threads`
- for each thread, request `stackTrace` for `threadId` (there is only one
thread in a Daffodil session)
- for each `frameId` of a stacktrace, request `scopes` which fetches the
relevant variables for the scope
```
2024-01-10 14:25:46,160 [io-compute-3] INFO o.a.d.d.d.DAPSession - <E
stopped breakpoint
2024-01-10 14:25:46,162 [io-compute-2] INFO o.a.d.d.d.DAPSession - R> #302
threads null
2024-01-10 14:25:46,162 [io-compute-7] INFO o.a.d.d.d.DAPSession - <R #302
threads success {"threads":[{"id":1,"name":"daffodil"}]}
2024-01-10 14:25:46,164 [io-compute-2] INFO o.a.d.d.d.DAPSession - R> #303
stackTrace {"threadId":1,"startFrame":0,"levels":20}
2024-01-10 14:25:46,164 [io-compute-2] INFO o.a.d.d.d.DAPSession - <R #303
stackTrace success
{"stackFrames":[{"id":348,"source":{"name":"pcap.dfdl.xsd","path":"/Users/arosien/nteligen/PCAP/src/main/resources/com/tresys/pcap/xsd/pcap.dfdl.xsd","sourceReference":0},"line":168,"column":0,"name":"Ethernet"},{"id":347,"source":{"name":"pcap.dfdl.xsd","path":"/Users/arosien/nteligen/PCAP/src/main/resources/com/tresys/pcap/xsd/pcap.dfdl.xsd","sourceReference":0},"line":155,"column":0,"name":"LinkLayer"},{"id":341,"source":{"name":"pcap.dfdl.xsd","path":"/Users/arosien/nteligen/PCAP/src/main/resources/com/tresys/pcap/xsd/pcap.dfdl.xsd","sourceReference":0},"line":128,"column":0,"name":"Packet"},{"id":2,"source":{"name":"pcap.dfdl.xsd","path":"/Users/arosien/nteligen/PCAP/src/main/resources/com/tresys/pcap/xsd/pcap.dfdl.xsd","sourceReference":0},"line":36,"column":0,"name":"PCAP"},{"id":1,"source":{"name":"pcap.dfdl.xsd","path":"/Users/arosien/nteligen/PCAP/src/main/resources/com/tresys/
pcap/xsd/pcap.dfdl.xsd","sourceReference":0},"line":36,"column":0,"name":"PCAP"}],"totalFrames":5}
2024-01-10 14:25:46,572 [io-compute-0] INFO o.a.d.d.d.DAPSession - R> #304
scopes {"frameId":348}
2024-01-10 14:25:46,572 [io-compute-1] INFO o.a.d.d.d.DAPSession - <R #304
scopes success
{"scopes":[{"name":"Parse","variablesReference":4165,"expensive":false},{"name":"Schema","variablesReference":4166,"expensive":false},{"name":"Data","variablesReference":4167,"expensive":false}]}
```
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