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8662 :: Is it possible to make the program crash if orc gc finds a cyclic reference?

[2021-11-28T12:14:14+01:00]

templatedperson (orginal) [2021-11-28T12:14:14+01:00] view original

I want to test my program with ORC and make sure there are no cyclic references and then ship it with ARC. Is this currenty possible? I thought maybe I could use the =trace hook but it doesn't return any info regarding whether there are cyclic references.

Araq (orginal) [2021-11-28T13:29:54+01:00] view original
You can compile with --gc:arc and watch its memory consumption. You can also override malloc to give you allocation counts.

Or compile with -d:nimAllocStats and use
```
dumpAllocstats:
  main()
```
Or use valgrind and -d:useMalloc. So many options already...

juancarlospaco (orginal) [2021-11-28T16:15:22+01:00] view original

Does -d:nimAllocStats has overhead ?, why is not always on ?, I used it successfully just wondering...

Araq (orginal) [2021-11-28T18:45:35+01:00] view original

Does -d:nimAllocStats has overhead ?, why is not always on ?, I used it successfully just wondering...
Overhead should be minimal but the API is not stable. :-)

treeform (orginal) [2021-11-28T21:01:55+01:00] view original

I am also interested in using orc in development to find cycles and dealing with them myself, but releasing code with arc. It would be great if there was a -d:traceWhenOrcFreesACycle option.