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Merged
merged 3 commits into from
Oct 6, 2021
Merged

lld on linux requires a special flag to make flamegraph work #157

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816b013
Flamegraph does not work with lld on linux.
mahkoh Oct 4, 2021
77bc517
lld can be used with the `--no-rosegment` flag
mahkoh Oct 4, 2021
2887f0c
Link https://crbug.com/919499#c16
mahkoh Oct 5, 2021
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8 changes: 8 additions & 0 deletions README.md
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Expand Up @@ -15,6 +15,14 @@ flamegraph generation library!

Windows is getting [dtrace support](https://techcommunity.microsoft.com/t5/Windows-Kernel-Internals/DTrace-on-Windows/ba-p/362902), so if you try this out please let us know how it goes :D

**Note**: If you're using lld on Linux, you must use the `--no-rosegment` flag. Otherwise perf will not be able to generate accurate stack traces ([explanation](https://crbug.com/919499#c16)). For example

```toml
[target.x86_64-unknown-linux-gnu]
linker = "/usr/bin/clang"
rustflags = ["-Clink-arg=-fuse-ld=lld", "-Clink-arg=-Wl,--no-rosegment"]
```

## Installation

Requirements on Linux (Ubuntu/Debian):
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