Ancestors

Written by kulupu jyn (job-hunting aspect) on 2024-12-18 at 04:24

you know you're having fun when

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Toot

Written by kulupu jyn (job-hunting aspect) on 2024-12-18 at 04:25

'5' is apparently _URC_END_OF_STACK, which i found by reading through libgcc_s sources

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Descendants

Written by kulupu jyn (job-hunting aspect) on 2024-12-18 at 04:29

i wonder if there exists a tool which can record the program execution and play back the callgraph

like rr but it prints out a tree instead of being interactive

then i could diff two different program executions

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Written by kulupu jyn (job-hunting aspect) on 2024-12-18 at 04:50

someone gave me the idea to script gdb to dump all the calls to a json file and then view them in https://fx.wtf/

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Written by d@nny mc² on 2024-12-18 at 04:36

@jyn pernosco seems rly cool and the closest to that i'm aware of

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Written by d@nny mc² on 2024-12-18 at 04:37

@jyn sounds useful for PGO stuff too

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Written by kulupu jyn (job-hunting aspect) on 2024-12-18 at 04:41

@hipsterelectron i suspect the profiler runtime already has this information internally and uses it for PGO but just doesn’t expose it in any way

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Written by d@nny mc² on 2024-12-18 at 04:41

@jyn yes!

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Written by d@nny mc² on 2024-12-18 at 04:42

@jyn there may also be tooling for linux perf to do this

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Written by d@nny mc² on 2024-12-18 at 04:42

@jyn doesn't give you the kind of tracing profiling you probably want in order to do real diffs though since perf is strictly sampling iirc

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Written by Ted Mielczarek on 2024-12-18 at 04:50

@hipsterelectron @jyn built by the author of rr, too.

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Written by aburka 🫣 on 2024-12-18 at 04:58

@jyn whoa this looks like a fun tool

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