Merging upstream version 1.69.0+dfsg1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

10 files changed, 250 insertions, 125 deletions

diff --git a/src/ci/docker/host-x86_64/dist-s390x-linux/Dockerfile b/src/ci/docker/host-x86_64/dist-s390x-linux/Dockerfile
index 43a449b3a..adb98d7eb 100644
--- a/src/ci/docker/host-x86_64/dist-s390x-linux/Dockerfile
+++ b/src/ci/docker/host-x86_64/dist-s390x-linux/Dockerfile
@@ -28,5 +28,5 @@ ENV \
 
 ENV HOSTS=s390x-unknown-linux-gnu
 
-ENV RUST_CONFIGURE_ARGS --enable-extended --enable-lld --enable-profiler --disable-docs
+ENV RUST_CONFIGURE_ARGS --enable-extended --enable-lld --enable-sanitizers --enable-profiler --disable-docs
 ENV SCRIPT python3 ../x.py dist --host $HOSTS --target $HOSTS
diff --git a/src/ci/docker/host-x86_64/dist-x86_64-linux/Dockerfile b/src/ci/docker/host-x86_64/dist-x86_64-linux/Dockerfile
index 6bdc88e18..5feba4e06 100644
--- a/src/ci/docker/host-x86_64/dist-x86_64-linux/Dockerfile
+++ b/src/ci/docker/host-x86_64/dist-x86_64-linux/Dockerfile
@@ -81,7 +81,7 @@ ENV RUST_CONFIGURE_ARGS \
       --set rust.jemalloc \
       --set rust.use-lld=true \
       --set rust.lto=thin
-ENV SCRIPT ../src/ci/pgo.sh python3 ../x.py dist \
+ENV SCRIPT python3 ../src/ci/stage-build.py python3 ../x.py dist \
     --host $HOSTS --target $HOSTS \
     --include-default-paths \
     build-manifest bootstrap
diff --git a/src/ci/docker/host-x86_64/mingw-check/Dockerfile b/src/ci/docker/host-x86_64/mingw-check/Dockerfile
index 4cc5d9f8a..98bd90210 100644
--- a/src/ci/docker/host-x86_64/mingw-check/Dockerfile
+++ b/src/ci/docker/host-x86_64/mingw-check/Dockerfile
@@ -23,6 +23,8 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
 
 RUN curl -sL https://nodejs.org/dist/v16.9.0/node-v16.9.0-linux-x64.tar.xz | tar -xJ
 ENV PATH="/node-v16.9.0-linux-x64/bin:${PATH}"
+ENV RUST_CONFIGURE_ARGS="--set rust.validate-mir-opts=3"
+
 # Install es-check
 # Pin its version to prevent unrelated CI failures due to future es-check versions.
 RUN npm install es-check@6.1.1 eslint@8.6.0 -g
@@ -38,7 +40,7 @@ COPY host-x86_64/mingw-check/validate-error-codes.sh /scripts/
 
 ENV RUN_CHECK_WITH_PARALLEL_QUERIES 1
 ENV SCRIPT python3 ../x.py --stage 2 test src/tools/expand-yaml-anchors && \
-           python3 ../x.py check --target=i686-pc-windows-gnu --host=i686-pc-windows-gnu --all-targets && \
+           python3 ../x.py check --target=i686-pc-windows-gnu --host=i686-pc-windows-gnu && \
            python3 ../x.py build --stage 0 src/tools/build-manifest && \
            python3 ../x.py test --stage 0 src/tools/compiletest && \
            python3 ../x.py test --stage 0 core alloc std test proc_macro && \
diff --git a/src/ci/docker/host-x86_64/mingw-check/validate-toolstate.sh b/src/ci/docker/host-x86_64/mingw-check/validate-toolstate.sh
index c6d728eb8..0b06f5e36 100755
--- a/src/ci/docker/host-x86_64/mingw-check/validate-toolstate.sh
+++ b/src/ci/docker/host-x86_64/mingw-check/validate-toolstate.sh
@@ -9,11 +9,5 @@ git clone --depth=1 https://github.com/rust-lang-nursery/rust-toolstate.git
 cd rust-toolstate
 python3 "../../src/tools/publish_toolstate.py" "$(git rev-parse HEAD)" \
     "$(git log --format=%s -n1 HEAD)" "" ""
-# Only check maintainers if this build is supposed to publish toolstate.
-# Builds that are not supposed to publish don't have the access token.
-if [ -n "${TOOLSTATE_PUBLISH+is_set}" ]; then
-  TOOLSTATE_VALIDATE_MAINTAINERS_REPO=rust-lang/rust python3 \
-      "../../src/tools/publish_toolstate.py"
-fi
 cd ..
 rm -rf rust-toolstate
diff --git a/src/ci/docker/host-x86_64/x86_64-gnu-llvm-13-stage1/Dockerfile b/src/ci/docker/host-x86_64/x86_64-gnu-llvm-13-stage1/Dockerfile
deleted file mode 100644
index bcbf58253..000000000
--- a/src/ci/docker/host-x86_64/x86_64-gnu-llvm-13-stage1/Dockerfile
+++ /dev/null
@@ -1,49 +0,0 @@
-FROM ubuntu:22.04
-
-ARG DEBIAN_FRONTEND=noninteractive
-RUN apt-get update && apt-get install -y --no-install-recommends \
-    g++ \
-    gcc-multilib \
-    make \
-    ninja-build \
-    file \
-    curl \
-    ca-certificates \
-    python2.7 \
-    git \
-    cmake \
-    sudo \
-    gdb \
-    llvm-13-tools \
-    llvm-13-dev \
-    libedit-dev \
-    libssl-dev \
-    pkg-config \
-    zlib1g-dev \
-    xz-utils \
-    nodejs \
-    && rm -rf /var/lib/apt/lists/*
-
-COPY scripts/sccache.sh /scripts/
-RUN sh /scripts/sccache.sh
-
-# We are disabling CI LLVM since this builder is intentionally using a host
-# LLVM, rather than the typical src/llvm-project LLVM.
-ENV NO_DOWNLOAD_CI_LLVM 1
-
-# Using llvm-link-shared due to libffi issues -- see #34486
-ENV RUST_CONFIGURE_ARGS \
-    --build=x86_64-unknown-linux-gnu \
-    --llvm-root=/usr/lib/llvm-13 \
-    --enable-llvm-link-shared \
-    --set rust.thin-lto-import-instr-limit=10
-
-ENV SCRIPT python2.7 ../x.py --stage 1 test --exclude src/tools/tidy && \
-    # Run the `mir-opt` tests again but this time for a 32-bit target.
-    # This enforces that tests using `// EMIT_MIR_FOR_EACH_BIT_WIDTH` have
-    # both 32-bit and 64-bit outputs updated by the PR author, before
-    # the PR is approved and tested for merging.
-    # It will also detect tests lacking `// EMIT_MIR_FOR_EACH_BIT_WIDTH`,
-    # despite having different output on 32-bit vs 64-bit targets.
-    python2.7 ../x.py --stage 1 test tests/mir-opt \
-    --host='' --target=i686-unknown-linux-gnu
diff --git a/src/ci/docker/host-x86_64/x86_64-gnu-llvm-14-stage1/Dockerfile b/src/ci/docker/host-x86_64/x86_64-gnu-llvm-14-stage1/Dockerfile
new file mode 100644
index 000000000..b99a0886b
--- /dev/null
+++ b/src/ci/docker/host-x86_64/x86_64-gnu-llvm-14-stage1/Dockerfile
@@ -0,0 +1,49 @@
+FROM ubuntu:22.04
+
+ARG DEBIAN_FRONTEND=noninteractive
+RUN apt-get update && apt-get install -y --no-install-recommends \
+  g++ \
+  gcc-multilib \
+  make \
+  ninja-build \
+  file \
+  curl \
+  ca-certificates \
+  python3 \
+  git \
+  cmake \
+  sudo \
+  gdb \
+  llvm-14-tools \
+  llvm-14-dev \
+  libedit-dev \
+  libssl-dev \
+  pkg-config \
+  zlib1g-dev \
+  xz-utils \
+  nodejs \
+  && rm -rf /var/lib/apt/lists/*
+
+COPY scripts/sccache.sh /scripts/
+RUN sh /scripts/sccache.sh
+
+# We are disabling CI LLVM since this builder is intentionally using a host
+# LLVM, rather than the typical src/llvm-project LLVM.
+ENV NO_DOWNLOAD_CI_LLVM 1
+
+# Using llvm-link-shared due to libffi issues -- see #34486
+ENV RUST_CONFIGURE_ARGS \
+      --build=x86_64-unknown-linux-gnu \
+      --llvm-root=/usr/lib/llvm-14 \
+      --enable-llvm-link-shared \
+      --set rust.thin-lto-import-instr-limit=10
+
+ENV SCRIPT ../x.py --stage 1 test --exclude src/tools/tidy && \
+           # Run the `mir-opt` tests again but this time for a 32-bit target.
+           # This enforces that tests using `// EMIT_MIR_FOR_EACH_BIT_WIDTH` have
+           # both 32-bit and 64-bit outputs updated by the PR author, before
+           # the PR is approved and tested for merging.
+           # It will also detect tests lacking `// EMIT_MIR_FOR_EACH_BIT_WIDTH`,
+           # despite having different output on 32-bit vs 64-bit targets.
+           ../x.py --stage 1 test tests/mir-opt \
+                             --host='' --target=i686-unknown-linux-gnu
diff --git a/src/ci/docker/host-x86_64/x86_64-gnu-llvm-13/Dockerfile b/src/ci/docker/host-x86_64/x86_64-gnu-llvm-14/Dockerfile
index 9fc9e9cbf..db6032f87 100644
--- a/src/ci/docker/host-x86_64/x86_64-gnu-llvm-13/Dockerfile
+++ b/src/ci/docker/host-x86_64/x86_64-gnu-llvm-14/Dockerfile
@@ -12,27 +12,25 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
   curl \
   ca-certificates \
   python2.7 \
-  python3.9 \
+  python3 \
   git \
   cmake \
   sudo \
   gdb \
-  llvm-13-tools \
-  llvm-13-dev \
+  llvm-14-tools \
+  llvm-14-dev \
   libedit-dev \
   libssl-dev \
   pkg-config \
   zlib1g-dev \
   xz-utils \
   nodejs \
-  \
-# Install powershell so we can test x.ps1 on Linux
-    apt-transport-https software-properties-common && \
-    curl -s "https://packages.microsoft.com/config/ubuntu/$(lsb_release -rs)/packages-microsoft-prod.deb" > packages-microsoft-prod.deb && \
-    dpkg -i packages-microsoft-prod.deb && \
-    apt-get update && \
-    apt-get install -y powershell \
-    && rm -rf /var/lib/apt/lists/*
+  && rm -rf /var/lib/apt/lists/*
+
+# Install powershell (universal package) so we can test x.ps1 on Linux
+RUN curl -sL "https://github.com/PowerShell/PowerShell/releases/download/v7.3.1/powershell_7.3.1-1.deb_amd64.deb" > powershell.deb && \
+    dpkg -i powershell.deb && \
+    rm -f powershell.deb
 
 COPY scripts/sccache.sh /scripts/
 RUN sh /scripts/sccache.sh
@@ -44,7 +42,7 @@ ENV NO_DOWNLOAD_CI_LLVM 1
 # Using llvm-link-shared due to libffi issues -- see #34486
 ENV RUST_CONFIGURE_ARGS \
       --build=x86_64-unknown-linux-gnu \
-      --llvm-root=/usr/lib/llvm-13 \
+      --llvm-root=/usr/lib/llvm-14 \
       --enable-llvm-link-shared \
       --set rust.thin-lto-import-instr-limit=10
 
diff --git a/src/ci/docker/host-x86_64/x86_64-gnu-llvm-15/Dockerfile b/src/ci/docker/host-x86_64/x86_64-gnu-llvm-15/Dockerfile
new file mode 100644
index 000000000..5219247cc
--- /dev/null
+++ b/src/ci/docker/host-x86_64/x86_64-gnu-llvm-15/Dockerfile
@@ -0,0 +1,67 @@
+FROM ubuntu:22.10
+
+ARG DEBIAN_FRONTEND=noninteractive
+
+# NOTE: intentionally installs both python2 and python3 so we can test support for both.
+RUN apt-get update && apt-get install -y --no-install-recommends \
+  g++ \
+  gcc-multilib \
+  make \
+  ninja-build \
+  file \
+  curl \
+  ca-certificates \
+  python2.7 \
+  python3 \
+  git \
+  cmake \
+  sudo \
+  gdb \
+  llvm-15-tools \
+  llvm-15-dev \
+  libedit-dev \
+  libssl-dev \
+  pkg-config \
+  zlib1g-dev \
+  xz-utils \
+  nodejs \
+  && rm -rf /var/lib/apt/lists/*
+
+# Install powershell (universal package) so we can test x.ps1 on Linux
+RUN curl -sL "https://github.com/PowerShell/PowerShell/releases/download/v7.3.1/powershell_7.3.1-1.deb_amd64.deb" > powershell.deb && \
+    dpkg -i powershell.deb && \
+    rm -f powershell.deb
+
+COPY scripts/sccache.sh /scripts/
+RUN sh /scripts/sccache.sh
+
+# We are disabling CI LLVM since this builder is intentionally using a host
+# LLVM, rather than the typical src/llvm-project LLVM.
+ENV NO_DOWNLOAD_CI_LLVM 1
+
+# Using llvm-link-shared due to libffi issues -- see #34486
+ENV RUST_CONFIGURE_ARGS \
+      --build=x86_64-unknown-linux-gnu \
+      --llvm-root=/usr/lib/llvm-15 \
+      --enable-llvm-link-shared \
+      --set rust.thin-lto-import-instr-limit=10
+
+# NOTE: intentionally uses all of `x.py`, `x`, and `x.ps1` to make sure they all work on Linux.
+ENV SCRIPT ../x.py --stage 2 test --exclude src/tools/tidy && \
+           # Run the `mir-opt` tests again but this time for a 32-bit target.
+           # This enforces that tests using `// EMIT_MIR_FOR_EACH_BIT_WIDTH` have
+           # both 32-bit and 64-bit outputs updated by the PR author, before
+           # the PR is approved and tested for merging.
+           # It will also detect tests lacking `// EMIT_MIR_FOR_EACH_BIT_WIDTH`,
+           # despite having different output on 32-bit vs 64-bit targets.
+           ../x --stage 2 test tests/mir-opt \
+                             --host='' --target=i686-unknown-linux-gnu && \
+           # Run the UI test suite again, but in `--pass=check` mode
+           #
+           # This is intended to make sure that both `--pass=check` continues to
+           # work.
+           #
+           ../x.ps1 --stage 2 test tests/ui --pass=check \
+                             --host='' --target=i686-unknown-linux-gnu && \
+           # Run tidy at the very end, after all the other tests.
+           python2.7 ../x.py --stage 2 test src/tools/tidy
diff --git a/src/ci/docker/host-x86_64/x86_64-gnu-tools/browser-ui-test.version b/src/ci/docker/host-x86_64/x86_64-gnu-tools/browser-ui-test.version
index c39e9c5fb..9c550b2d7 100644
--- a/src/ci/docker/host-x86_64/x86_64-gnu-tools/browser-ui-test.version
+++ b/src/ci/docker/host-x86_64/x86_64-gnu-tools/browser-ui-test.version
@@ -1 +1 @@
-0.14.1
\ No newline at end of file
+0.14.4
\ No newline at end of file
diff --git a/src/ci/docker/scripts/fuchsia-test-runner.py b/src/ci/docker/scripts/fuchsia-test-runner.py
index c8d1ff9ae..e7d1d9781 100755
--- a/src/ci/docker/scripts/fuchsia-test-runner.py
+++ b/src/ci/docker/scripts/fuchsia-test-runner.py
@@ -9,6 +9,7 @@ https://doc.rust-lang.org/stable/rustc/platform-support/fuchsia.html#aarch64-unk
 
 import argparse
 from dataclasses import dataclass
+import fcntl
 import glob
 import hashlib
 import json
@@ -19,18 +20,18 @@ import shutil
 import signal
 import subprocess
 import sys
-from typing import ClassVar, List
+from typing import ClassVar, List, Optional
 
 
 @dataclass
 class TestEnvironment:
     rust_dir: str
     sdk_dir: str
-    target_arch: str
-    package_server_pid: int = None
-    emu_addr: str = None
-    libstd_name: str = None
-    libtest_name: str = None
+    target: str
+    package_server_pid: Optional[int] = None
+    emu_addr: Optional[str] = None
+    libstd_name: Optional[str] = None
+    libtest_name: Optional[str] = None
     verbose: bool = False
 
     @staticmethod
@@ -40,6 +41,15 @@ class TestEnvironment:
             return os.path.abspath(tmp_dir)
         return os.path.join(os.path.dirname(__file__), "tmp~")
 
+    @staticmethod
+    def triple_to_arch(triple):
+        if "x86_64" in triple:
+            return "x64"
+        elif "aarch64" in triple:
+            return "arm64"
+        else:
+            raise Exception(f"Unrecognized target triple {triple}")
+
     @classmethod
     def env_file_path(cls):
         return os.path.join(cls.tmp_dir(), "test_env.json")
@@ -49,7 +59,7 @@ class TestEnvironment:
         return cls(
             os.path.abspath(args.rust),
             os.path.abspath(args.sdk),
-            args.target_arch,
+            args.target,
             verbose=args.verbose,
         )
 
@@ -60,7 +70,7 @@ class TestEnvironment:
             return cls(
                 test_env["rust_dir"],
                 test_env["sdk_dir"],
-                test_env["target_arch"],
+                test_env["target"],
                 libstd_name=test_env["libstd_name"],
                 libtest_name=test_env["libtest_name"],
                 emu_addr=test_env["emu_addr"],
@@ -68,13 +78,6 @@ class TestEnvironment:
                 verbose=test_env["verbose"],
             )
 
-    def image_name(self):
-        if self.target_arch == "x64":
-            return "qemu-x64"
-        if self.target_arch == "arm64":
-            return "qemu-arm64"
-        raise Exception(f"Unrecognized target architecture {self.target_arch}")
-
     def write_to_file(self):
         with open(self.env_file_path(), "w", encoding="utf-8") as f:
             f.write(json.dumps(self.__dict__))
@@ -108,13 +111,6 @@ class TestEnvironment:
     def repo_dir(self):
         return os.path.join(self.tmp_dir(), self.TEST_REPO_NAME)
 
-    def rustlib_dir(self):
-        if self.target_arch == "x64":
-            return "x86_64-unknown-fuchsia"
-        if self.target_arch == "arm64":
-            return "aarch64-unknown-fuchsia"
-        raise Exception(f"Unrecognized target architecture {self.target_arch}")
-
     def libs_dir(self):
         return os.path.join(
             self.rust_dir,
@@ -125,7 +121,7 @@ class TestEnvironment:
         return os.path.join(
             self.libs_dir(),
             "rustlib",
-            self.rustlib_dir(),
+            self.target,
             "lib",
         )
 
@@ -151,6 +147,9 @@ class TestEnvironment:
     def zxdb_script_path(self):
         return os.path.join(self.tmp_dir(), "zxdb_script")
 
+    def pm_lockfile_path(self):
+        return os.path.join(self.tmp_dir(), "pm.lock")
+
     def log_info(self, msg):
         print(msg)
 
@@ -384,7 +383,7 @@ class TestEnvironment:
                 "--emulator-log",
                 self.emulator_log_path(),
                 "--image-name",
-                self.image_name(),
+                "qemu-" + self.triple_to_arch(self.target),
             ],
             stdout=self.subprocess_output(),
             stderr=self.subprocess_output(),
@@ -465,6 +464,9 @@ class TestEnvironment:
             stderr=self.subprocess_output(),
         )
 
+        # Create lockfiles
+        open(self.pm_lockfile_path(), 'a').close()
+
         # Write to file
         self.write_to_file()
 
@@ -512,9 +514,8 @@ class TestEnvironment:
     bin/{exe_name}={bin_path}
     lib/{libstd_name}={rust_dir}/lib/rustlib/{rustlib_dir}/lib/{libstd_name}
     lib/{libtest_name}={rust_dir}/lib/rustlib/{rustlib_dir}/lib/{libtest_name}
-    lib/ld.so.1={sdk_dir}/arch/{target_arch}/sysroot/lib/libc.so
-    lib/libzircon.so={sdk_dir}/arch/{target_arch}/sysroot/lib/libzircon.so
-    lib/libfdio.so={sdk_dir}/arch/{target_arch}/lib/libfdio.so
+    lib/ld.so.1={sdk_dir}/arch/{target_arch}/sysroot/dist/lib/ld.so.1
+    lib/libfdio.so={sdk_dir}/arch/{target_arch}/dist/libfdio.so
     """
 
     TEST_ENV_VARS: ClassVar[List[str]] = [
@@ -642,11 +643,11 @@ class TestEnvironment:
                         package_dir=package_dir,
                         package_name=package_name,
                         rust_dir=self.rust_dir,
-                        rustlib_dir=self.rustlib_dir(),
+                        rustlib_dir=self.target,
                         sdk_dir=self.sdk_dir,
                         libstd_name=self.libstd_name,
                         libtest_name=self.libtest_name,
-                        target_arch=self.target_arch,
+                        target_arch=self.triple_to_arch(self.target),
                     )
                 )
                 for shared_lib in shared_libs:
@@ -682,19 +683,25 @@ class TestEnvironment:
             log("Publishing package to repo...")
 
             # Publish package to repo
-            subprocess.check_call(
-                [
-                    self.tool_path("pm"),
-                    "publish",
-                    "-a",
-                    "-repo",
-                    self.repo_dir(),
-                    "-f",
-                    far_path,
-                ],
-                stdout=log_file,
-                stderr=log_file,
-            )
+            with open(self.pm_lockfile_path(), 'w') as pm_lockfile:
+                fcntl.lockf(pm_lockfile.fileno(), fcntl.LOCK_EX)
+                subprocess.check_call(
+                    [
+                        self.tool_path("pm"),
+                        "publish",
+                        "-a",
+                        "-repo",
+                        self.repo_dir(),
+                        "-f",
+                        far_path,
+                    ],
+                    stdout=log_file,
+                    stderr=log_file,
+                )
+                # This lock should be released automatically when the pm
+                # lockfile is closed, but we'll be polite and unlock it now
+                # since the spec leaves some wiggle room.
+                fcntl.lockf(pm_lockfile.fileno(), fcntl.LOCK_UN)
 
             log("Running ffx test...")
 
@@ -849,23 +856,34 @@ class TestEnvironment:
             "--",
             "--build-id-dir",
             os.path.join(self.sdk_dir, ".build-id"),
-            "--build-id-dir",
-            os.path.join(self.libs_dir(), ".build-id"),
         ]
 
-        # Add rust source if it's available
-        if args.rust_src is not None:
+        libs_build_id_path = os.path.join(self.libs_dir(), ".build-id")
+        if os.path.exists(libs_build_id_path):
+            # Add .build-id symbols if installed libs have been stripped into a
+            # .build-id directory
             command += [
-                "--build-dir",
-                args.rust_src,
+                "--build-id-dir",
+                libs_build_id_path,
+            ]
+        else:
+            # If no .build-id directory is detected, then assume that the shared
+            # libs contain their debug symbols
+            command += [
+                f"--symbol-path={self.rust_dir}/lib/rustlib/{self.target}/lib",
             ]
 
+        # Add rust source if it's available
+        rust_src_map = None
+        if args.rust_src is not None:
+            # This matches the remapped prefix used by compiletest. There's no
+            # clear way that we can determine this, so it's hard coded.
+            rust_src_map = f"/rustc/FAKE_PREFIX={args.rust_src}"
+
         # Add fuchsia source if it's available
+        fuchsia_src_map = None
         if args.fuchsia_src is not None:
-            command += [
-                "--build-dir",
-                os.path.join(args.fuchsia_src, "out", "default"),
-            ]
+            fuchsia_src_map = f"./../..={args.fuchsia_src}"
 
         # Load debug symbols for the test binary and automatically attach
         if args.test is not None:
@@ -888,7 +906,28 @@ class TestEnvironment:
                 test_name,
             )
 
+            # The fake-test-src-base directory maps to the suite directory
+            # e.g. tests/ui/foo.rs has a path of rust/fake-test-src-base/foo.rs
+            fake_test_src_base = os.path.join(
+                args.rust_src,
+                "fake-test-src-base",
+            )
+            real_test_src_base = os.path.join(
+                args.rust_src,
+                "tests",
+                args.test.split(os.path.sep)[0],
+            )
+            test_src_map = f"{fake_test_src_base}={real_test_src_base}"
+
             with open(self.zxdb_script_path(), mode="w", encoding="utf-8") as f:
+                print(f"set source-map += {test_src_map}", file=f)
+
+                if rust_src_map is not None:
+                    print(f"set source-map += {rust_src_map}", file=f)
+
+                if fuchsia_src_map is not None:
+                    print(f"set source-map += {fuchsia_src_map}", file=f)
+
                 print(f"attach {test_name[:31]}", file=f)
 
             command += [
@@ -905,6 +944,20 @@ class TestEnvironment:
         # Connect to the running emulator with zxdb
         subprocess.run(command, env=self.ffx_cmd_env(), check=False)
 
+    def syslog(self, args):
+        subprocess.run(
+            [
+                self.tool_path("ffx"),
+                "--config",
+                self.ffx_user_config_path(),
+                "log",
+                "--since",
+                "now",
+            ],
+            env=self.ffx_cmd_env(),
+            check=False,
+        )
+
 
 def start(args):
     test_env = TestEnvironment.from_args(args)
@@ -938,6 +991,12 @@ def debug(args):
     return 0
 
 
+def syslog(args):
+    test_env = TestEnvironment.read_from_file()
+    test_env.syslog(args)
+    return 0
+
+
 def main():
     parser = argparse.ArgumentParser()
 
@@ -969,8 +1028,8 @@ def main():
         action="store_true",
     )
     start_parser.add_argument(
-        "--target-arch",
-        help="the architecture of the image to test",
+        "--target",
+        help="the target platform to test",
         required=True,
     )
     start_parser.set_defaults(func=start)
@@ -1033,6 +1092,11 @@ def main():
     )
     debug_parser.set_defaults(func=debug)
 
+    syslog_parser = subparsers.add_parser(
+        "syslog", help="prints the device syslog"
+    )
+    syslog_parser.set_defaults(func=syslog)
+
     args = parser.parse_args()
     return args.func(args)