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Diffstat (limited to 'src/doc/rustc/src/platform-support/fuchsia.md')
| -rw-r--r-- | src/doc/rustc/src/platform-support/fuchsia.md | 98 |
1 files changed, 80 insertions, 18 deletions
diff --git a/src/doc/rustc/src/platform-support/fuchsia.md b/src/doc/rustc/src/platform-support/fuchsia.md index 29e70129a..4d97b8c6c 100644 --- a/src/doc/rustc/src/platform-support/fuchsia.md +++ b/src/doc/rustc/src/platform-support/fuchsia.md @@ -12,7 +12,6 @@ The [Fuchsia team]: - Tyler Mandry ([@tmandry](https://github.com/tmandry)) - Dan Johnson ([@computerdruid](https://github.com/computerdruid)) - David Koloski ([@djkoloski](https://github.com/djkoloski)) -- Andrew Pollack ([@andrewpollack](https://github.com/andrewpollack)) - Joseph Ryan ([@P1n3appl3](https://github.com/P1n3appl3)) As the team evolves over time, the specific members listed here may differ from @@ -687,7 +686,9 @@ Rust compiler locally. See "[Targeting Fuchsia with a compiler built from source for the steps to build locally. You'll also need to download a copy of the Fuchsia SDK. The current minimum -supported SDK version is [9.20220726.1.1](https://chrome-infra-packages.appspot.com/p/fuchsia/sdk/core/linux-amd64/+/version:9.20220726.1.1). +supported SDK version is [10.20221207.2.89][minimum_supported_sdk_version]. + +[minimum_supported_sdk_version]: https://chrome-infra-packages.appspot.com/p/fuchsia/sdk/core/linux-amd64/+/version:10.20221207.2.89 Fuchsia's test runner interacts with the Fuchsia emulator and is located at `src/ci/docker/scripts/fuchsia-test-runner.py`. We can use it to start our @@ -697,7 +698,7 @@ test environment with: src/ci/docker/scripts/fuchsia-test-runner.py start --rust ${RUST_SRC_PATH}/install --sdk ${SDK_PATH} - --target-arch {x64,arm64} + --target {x86_64-unknown-fuchsia|aarch64-unknown-fuchsia} ``` Where `${RUST_SRC_PATH}/install` is the `prefix` set in `config.toml` and @@ -715,28 +716,30 @@ run the full `tests/ui` test suite: --stage=2 \ test tests/ui \ --target x86_64-unknown-fuchsia \ - --run=always --jobs 1 \ - --test-args --target-rustcflags \ - --test-args -L \ - --test-args --target-rustcflags \ - --test-args ${SDK_PATH}/arch/{x64|arm64}/sysroot/lib \ + --run=always \ --test-args --target-rustcflags \ - --test-args -L \ + --test-args -Lnative=${SDK_PATH}/arch/{x64|arm64}/sysroot/lib \ --test-args --target-rustcflags \ - --test-args ${SDK_PATH}/arch/{x64|arm64}/lib \ + --test-args -Lnative=${SDK_PATH}/arch/{x64|arm64}/lib \ --test-args --target-rustcflags \ - --test-args -Cpanic=abort \ - --test-args --target-rustcflags \ - --test-args -Zpanic_abort_tests \ + --test-args -Clink-arg=--undefined-version \ --test-args --remote-test-client \ --test-args src/ci/docker/scripts/fuchsia-test-runner.py \ ) ``` -*Note: The test suite cannot be run in parallel at the moment, so `x.py` -must be run with `--jobs 1` to ensure only one test runs at a time.* +By default, `x.py` compiles test binaries with `panic=unwind`. If you built your +Rust toolchain with `-Cpanic=abort`, you need to tell `x.py` to compile test +binaries with `panic=abort` as well: -When finished, the test runner can be used to stop the test environment: +```sh + --test-args --target-rustcflags \ + --test-args -Cpanic=abort \ + --test-args --target-rustcflags \ + --test-args -Zpanic_abort_tests \ +``` + +When finished testing, the test runner can be used to stop the test environment: ```sh src/ci/docker/scripts/fuchsia-test-runner.py stop @@ -764,8 +767,9 @@ ${SDK_PATH}/tools/${ARCH}/ffx debug connect -- \ * `--symbol-path` gets required symbol paths, which are necessary for stepping through your program. -The "[displaying source code in `zxdb`](#displaying-source-code-in-zxdb)" section describes how you can -display Rust and/or Fuchsia source code in your debugging session. +The "[displaying source code in `zxdb`](#displaying-source-code-in-zxdb)" +section describes how you can display Rust and/or Fuchsia source code in your +debugging session. ### Using `zxdb` @@ -866,6 +870,64 @@ ${SDK_PATH}/tools/${ARCH}/ffx debug connect -- \ Linking to a Fuchsia checkout can help with debugging Fuchsia libraries, such as [fdio]. +### Debugging the compiler test suite + +Debugging the compiler test suite requires some special configuration: + +First, we have to properly configure zxdb so it will be able to find debug +symbols and source information for our test. The test runner can do this for us +with: + +```sh +src/ci/docker/scripts/fuchsia-test-runner.py debug \ + --rust-src ${RUST_SRC_PATH} \ + --fuchsia-src ${FUCHSIA_SRC_PATH} \ + --test ${TEST} +``` + +where `${TEST}` is relative to Rust's `tests` directory (e.g. `ui/abi/...`). + +This will start a zxdb session that is properly configured for the specific test +being run. All three arguments are optional, so you can omit `--fuchsia-src` if +you don't have it downloaded. Now is a good time to set any desired breakpoints, +like `b main`. + +Next, we have to tell `x.py` not to optimize or strip debug symbols from our +test suite binaries. We can do this by passing some new arguments to `rustc` +through our `x.py` invocation. The full invocation is: + +```sh +( \ + source config-env.sh && \ + ./x.py \ + --config config.toml \ + --stage=2 \ + test tests/${TEST} \ + --target x86_64-unknown-fuchsia \ + --run=always \ + --test-args --target-rustcflags \ + --test-args -Lnative=${SDK_PATH}/arch/{x64|arm64}/sysroot/lib \ + --test-args --target-rustcflags \ + --test-args -Lnative=${SDK_PATH}/arch/{x64|arm64}/lib \ + --test-args --target-rustcflags \ + --test-args -Clink-arg=--undefined-version \ + --test-args --target-rustcflags \ + --test-args -Cdebuginfo=2 \ + --test-args --target-rustcflags \ + --test-args -Copt-level=0 \ + --test-args --target-rustcflags \ + --test-args -Cstrip=none \ + --test-args --remote-test-client \ + --test-args src/ci/docker/scripts/fuchsia-test-runner.py \ +) +``` + +*If you built your Rust toolchain with `panic=abort`, make sure to include the +previous flags so your test binaries are also compiled with `panic=abort`.* + +Upon running this command, the test suite binary will be run and zxdb will +attach and load any relevant debug symbols. + [Fuchsia team]: https://team-api.infra.rust-lang.org/v1/teams/fuchsia.json [Fuchsia]: https://fuchsia.dev/ [source tree]: https://fuchsia.dev/fuchsia-src/get-started/learn/build |