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plasma-umass / coz

Coz: Causal Profiling
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`coz` on Rust programs in release mode (using coz-rs) picks random lines in `addr2line` and never files in `src` #197

Open LoganDark opened 2 years ago

LoganDark commented 2 years ago

I'm trying to use coz and coz-rs to do profiling things to a Rust application but I'm running into issues. The application is being built in release mode with debuginfo.

clion64_7dwaM4Gym2

It keeps picking random lines in addr2line instead of my actual program.

If I specify --source-scope, then all the source files of my program are "included" (according to inspect.cpp:509), but then no experiments are ever conducted. Probably because coz thinks the entire program is just addr2line.

If I build the binary in debug mode, it is prohibitively slow and unoptimized, but experiments get conducted.

In release mode with opt-level 2 experiments are not conducted.

In release mode with opt-level 1 experiments are not conducted.

In release mode with opt-level 0 experiments are conducted.

bjorn3 commented 2 years ago

You need to enable debuginfo I believe. To enable debuginfo in release mode you can add the following to Cargo.toml:

[profile.release]
debug = 1
LoganDark commented 2 years ago

You need to enable debuginfo I believe. To enable debuginfo in release mode you can add the following to Cargo.toml:

[profile.release]
debug = 1

I am using CARGO_PROFILE_RELEASE_DEBUG=true.

The application is being built in release mode with debuginfo

bjorn3 commented 2 years ago

That should be enough to enable debuginfo. I am not familiar with the internals of coz, so I don't think I can help.

SoftwareApe commented 3 months ago

@bjorn3 can you provide an example program?