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doc: Document building with sanitizers

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Sergei Zimmerman 2025-09-19 01:30:57 +03:00
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doc/manual/source/development/debugging.md
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@ -24,6 +24,19 @@ It is also possible to build without debugging for faster build:
(The first line is needed because `fortify` hardening requires at least some optimization.) (The first line is needed because `fortify` hardening requires at least some optimization.)
## Building Nix with sanitizers
Nix can be built with [Address](https://clang.llvm.org/docs/AddressSanitizer.html) and
[UB](https://clang.llvm.org/docs/UndefinedBehaviorSanitizer.html) sanitizers using LLVM
or GCC. This is useful when debugging memory corruption issues.
```console
[nix-shell]$ export mesonBuildType=debugoptimized
[nix-shell]$ appendToVar mesonFlags "-Dlibexpr:gc=disabled" # Disable Boehm
[nix-shell]$ appendToVar mesonFlags "-Dbindings=false" # Disable nix-perl
[nix-shell]$ appendToVar mesonFlags "-Db_sanitize=address,undefined"
```
## Debugging the Nix Binary ## Debugging the Nix Binary
Obtain your preferred debugger within the development shell: Obtain your preferred debugger within the development shell: