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Debugging python #211

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Jul 22, 2024
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Debugging python #211

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Debugging python
nsmithtt Jul 21, 2024
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fix trailing whitespace
nsmithtt Jul 21, 2024
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32 changes: 32 additions & 0 deletions docs/src/build.md
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Expand Up @@ -220,3 +220,35 @@ git submodule foreach 'git lfs fetch --all && git lfs pull’
```

Then, try to build again.

## Common Runtime Errors

### Debugging python on macOS

When debugging python on macOS via lldb you may see an error like:
```
(lldb) r
error: process exited with status -1 (attach failed (Not allowed to attach to process. Look in the console messages (Console.app), near the debugserver entries, when the attach failed. The subsystem that denied t
he attach permission will likely have logged an informative message about why it was denied.))
```

For preinstalled macOS binaries you must manually codesign with debug entitlements.

Create file `debuggee-entitlement.xml`:
```xml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
<key>com.apple.security.cs.disable-library-validation</key>
<true/>
<key>com.apple.security.get-task-allow</key>
<true/>
</dict>
</plist>
```

Sign the binary:
```bash
sudo codesign -f -s - --entitlements debuggee-entitlement.xml /opt/ttmlir-toolchain/venv/bin/python
```
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