feat: add support for bazel (#759)

.bazelrc

@@ -0,0 +1,11 @@
+common --enable_platform_specific_config
+
+build --cxxopt=-std=c++2a
+
+# Show everything when running tests.
+test --test_output=streamed
+
+build:macos --macos_minimum_os=10.15
+build:macos --no@fuzztest//fuzztest:use_riegeli
+
+try-import %workspace%/fuzztest.bazelrc

.github/workflows/main.yml

@@ -107,6 +107,14 @@ jobs:
         mkdir libs
         cp libsnmallocshim*.so libs
         for lib in `ls libs`; do echo; echo Testing $lib; ninja clean; LD_PRELOAD=libs/$lib ninja libsnmallocshim.so; done
+    - uses: bazelbuild/setup-bazelisk@v3
+    - name: Mount bazel cache  # Optional
+      uses: actions/cache@v4
+      with:
+        path: "~/.cache/bazel"
+        key: bazel
+    - run: bazel build -c opt //:snmalloc
+    - run: bazel build -c opt //:snmalloc-rs
 
   # If this looks remarkably familiar, that's because it is.  Sigh.
   macos:
@@ -151,6 +159,14 @@ jobs:
         mkdir libs
         cp libsnmallocshim*.so libs
         for lib in `ls libs`; do echo; echo Testing $lib; ninja clean; LD_PRELOAD=libs/$lib ninja libsnmallocshim.so; done
+    - uses: bazelbuild/setup-bazelisk@v3
+    - name: Mount bazel cache  # Optional
+      uses: actions/cache@v4
+      with:
+        path: "~/.cache/bazel"
+        key: bazel
+    - run: bazel build -c opt //:snmalloc
+    - run: bazel build -c opt //:snmalloc-rs
 
 
   # GitHub doesn't natively support *BSD, but we can run them in VMs on Mac /
@@ -448,7 +464,6 @@ jobs:
       run: ctest -j 2 --interactive-debug-mode 0 --output-on-failure -C ${{ matrix.build-type }} --timeout 400
       timeout-minutes: 20
 
-
   # Job to run clang-format and report errors
   format:
     runs-on: ubuntu-22.04
@@ -488,6 +503,13 @@ jobs:
       run: cmake --build ${{github.workspace}}/build --target snmalloc-fuzzer
     - name: Test
       run: ${{github.workspace}}/build/fuzzing/snmalloc-fuzzer
+    - uses: bazelbuild/setup-bazelisk@v3
+    - name: Mount bazel cache  # Optional
+      uses: actions/cache@v4
+      with:
+        path: "~/.cache/bazel"
+        key: bazel
+    - run: bazel test -c opt --config=asan //fuzzing:snmalloc_fuzzer
 
   self-vendored:
     strategy:

BUILD.bazel

@@ -0,0 +1,91 @@
+load("@rules_foreign_cc//foreign_cc:defs.bzl", "cmake")
+
+filegroup(
+    name = "srcs",
+    srcs = glob(
+        [
+            "src/snmalloc/**/*",
+            "src/test/*.h",
+            "CMakeLists.txt",
+        ],
+    ),
+    visibility = ["//visibility:private"],
+)
+
+config_setting(
+    name = "release_with_debug",
+    values = {
+        "compilation_mode": "fastbuild",
+    },
+)
+
+config_setting(
+    name = "release",
+    values = {
+        "compilation_mode": "opt",
+    },
+)
+
+config_setting(
+    name = "debug",
+    values = {
+        "compilation_mode": "dbg",
+    },
+)
+
+CMAKE_FLAGS = {
+    "CMAKE_INTERPROCEDURAL_OPTIMIZATION": "TRUE",
+    "SNMALLOC_OPTIMISE_FOR_CURRENT_MACHINE": "ON",
+    "SNMALLOC_USE_SELF_VENDORED_STL": "OFF",
+    "SNMALLOC_IPO": "ON",
+    "USE_SNMALLOC_STATS": "ON",
+} | select({
+    ":release_with_debug": {"CMAKE_BUILD_TYPE": "RelWithDebInfo"},
+    ":release": {"CMAKE_BUILD_TYPE": "Release"},
+    ":debug": {"CMAKE_BUILD_TYPE": "Debug"},
+    "//conditions:default": {"CMAKE_BUILD_TYPE": "Release"},
+})
+
+cmake(
+    name = "snmalloc",
+    cache_entries = CMAKE_FLAGS,
+    generate_args = ["-G Ninja"],
+    lib_source = ":srcs",
+    out_shared_libs = select({
+        "@bazel_tools//src/conditions:darwin": [
+            "libsnmallocshim-checks-memcpy-only.dylib",
+            "libsnmallocshim-checks.dylib",
+            "libsnmallocshim.dylib",
+        ],
+        "//conditions:default": [],
+    }),
+    out_static_libs = [
+        "libsnmallocshim-static.a",
+        "libsnmalloc-new-override.a",
+    ],
+    postfix_script = "ninja",
+    visibility = ["//visibility:public"],
+)
+
+cmake(
+    name = "snmalloc-rs",
+    cache_entries = CMAKE_FLAGS | {
+        "SNMALLOC_RUST_SUPPORT": "ON",
+    },
+    generate_args = ["-G Ninja"],
+    lib_source = ":srcs",
+    out_shared_libs = select({
+        "@bazel_tools//src/conditions:darwin": [
+            "libsnmallocshim-checks-memcpy-only.dylib",
+            "libsnmallocshim-checks.dylib",
+            "libsnmallocshim.dylib",
+        ],
+        "//conditions:default": [],
+    }),
+    out_static_libs = [
+        "libsnmallocshim-static.a",
+        "libsnmalloc-new-override.a",
+    ],
+    postfix_script = "ninja",
+    visibility = ["//visibility:public"],
+)

CMakeLists.txt

@@ -659,11 +659,16 @@ install(TARGETS EXPORT snmallocConfig DESTINATION ${CMAKE_INSTALL_LIBDIR}
   PUBLIC_HEADER DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/snmalloc)
 
 install(DIRECTORY src/snmalloc/aal DESTINATION include/snmalloc)
-install(DIRECTORY src/snmalloc/ds DESTINATION include/snmalloc)
-install(DIRECTORY src/snmalloc/override DESTINATION include/snmalloc)
 install(DIRECTORY src/snmalloc/backend DESTINATION include/snmalloc)
+install(DIRECTORY src/snmalloc/backend_helpers DESTINATION include/snmalloc)
+install(DIRECTORY src/snmalloc/ds DESTINATION include/snmalloc)
+install(DIRECTORY src/snmalloc/ds_aal DESTINATION include/snmalloc)
+install(DIRECTORY src/snmalloc/ds_core DESTINATION include/snmalloc)
+install(DIRECTORY src/snmalloc/global DESTINATION include/snmalloc)
 install(DIRECTORY src/snmalloc/mem DESTINATION include/snmalloc)
+install(DIRECTORY src/snmalloc/override DESTINATION include/snmalloc)
 install(DIRECTORY src/snmalloc/pal DESTINATION include/snmalloc)
+install(DIRECTORY src/snmalloc/stl DESTINATION include/snmalloc)
 install(FILES
     src/test/measuretime.h
     src/test/opt.h

MODULE.bazel

@@ -0,0 +1,6 @@
+module(name = "snmalloc")
+
+bazel_dep(name = "rules_cc", version = "0.1.1")
+bazel_dep(name = "rules_foreign_cc", version = "0.14.0")
+bazel_dep(name = "fuzztest", version = "20250214.0")
+bazel_dep(name = "googletest", version = "1.16.0")

fuzzing/BUILD.bazel

@@ -0,0 +1,25 @@
+load("@rules_cc//cc:defs.bzl", "cc_test")
+
+# will raise `ERROR: AddressSanitizer: SEGV on unknown address` if run without -c opt
+# --config=asan adds AddressSanitizer libs
+# bazel test -c opt --config=asan //fuzzing:snmalloc_fuzzer
+cc_test(
+    name = "snmalloc_fuzzer",
+    srcs = ["snmalloc-fuzzer.cpp"],
+    copts = [
+        "-fsanitize=address",
+    ] + select({
+        "@bazel_tools//tools/cpp:clang-cl": ["-fexperimental-library"],  # needed for std::execution::unseq,
+        "//conditions:default": ["-mcx16"],
+    }),
+    defines = [
+        "SNMALLOC_USE_WAIT_ON_ADDRESS=0",
+        "ADDRESS_SANITIZER",
+    ],
+    linkstatic = True,
+    malloc = "//:snmalloc",
+    deps = [
+        "@fuzztest//fuzztest",
+        "@fuzztest//fuzztest:fuzztest_gtest_main",
+    ],
+)

fuzztest.bazelrc

@@ -0,0 +1,85 @@
+### DO NOT EDIT. Generated file.
+#
+# To regenerate, run the following from your project's workspace:
+#
+#  bazel run @com_google_fuzztest//bazel:setup_configs > fuzztest.bazelrc
+#
+# And don't forget to add the following to your project's .bazelrc:
+#
+#  try-import %workspace%/fuzztest.bazelrc
+
+### Common options.
+#
+# Do not use directly.
+
+# Standard define for \"ifdef-ing\" any fuzz test specific code.
+build:fuzztest-common --copt=-DFUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION
+
+# In fuzz tests, we want to catch assertion violations even in optimized builds.
+build:fuzztest-common --copt=-UNDEBUG
+
+# Enable libc++ assertions.
+# See https://libcxx.llvm.org/UsingLibcxx.html#enabling-the-safe-libc-mode
+build:fuzztest-common --copt=-D_LIBCPP_ENABLE_ASSERTIONS=1
+
+### ASan (Address Sanitizer) build configuration.
+#
+# Use with: --config=asan
+
+build:asan --linkopt=-fsanitize=address
+build:asan --copt=-fsanitize=address
+
+# We rely on the following flag instead of the compiler provided
+# __has_feature(address_sanitizer) to know that we have an ASAN build even in
+# the uninstrumented runtime.
+build:asan --copt=-DADDRESS_SANITIZER
+
+### FuzzTest build configuration.
+#
+# Use with: --config=fuzztest
+#
+# Note that this configuration includes the ASan configuration.
+
+build:fuzztest --config=asan
+build:fuzztest --config=fuzztest-common
+
+# Link statically.
+build:fuzztest --dynamic_mode=off
+
+# We apply coverage tracking instrumentation to everything but Centipede and the
+# FuzzTest framework itself (including GoogleTest and GoogleMock).
+build:fuzztest --copt=-fsanitize-coverage=inline-8bit-counters,trace-cmp,pc-table
+build:fuzztest --per_file_copt=common/.*,fuzztest/.*,centipede/.*,-centipede/.*fuzz_target,googletest/.*,googlemock/.*@-fsanitize-coverage=0
+
+### Experimental FuzzTest build configuration.
+#
+# Use with: --config=fuzztest-experimental
+#
+# Use this instead of --config=fuzztest when building test binaries to run with
+# Centipede. Eventually, this will be consolidated with --config=fuzztest.
+# Note that this configuration doesn't include the ASan configuration. If you
+# want to use both, you can use --config=fuzztest-experimental --config=asan.
+
+build:fuzztest-experimental --config=fuzztest-common
+build:fuzztest-experimental --@com_google_fuzztest//fuzztest:centipede_integration
+
+# Generate line tables for debugging.
+build:fuzztest-experimental --copt=-gline-tables-only
+build:fuzztest-experimental --strip=never
+
+# Prevent memcmp & co from being inlined.
+build:fuzztest-experimental --copt=-fno-builtin
+
+# Disable heap checking.
+build:fuzztest-experimental --copt=-DHEAPCHECK_DISABLE
+
+# Link statically.
+build:fuzztest-experimental --dynamic_mode=off
+
+# We apply coverage tracking instrumentation to everything but Centipede and the
+# FuzzTest framework itself (including GoogleTest and GoogleMock).
+# TODO(b/374840534): Add -fsanitize-coverage=control-flow once we start building
+# with clang 16+.
+build:fuzztest-experimental --copt=-fsanitize-coverage=trace-pc-guard,pc-table,trace-loads,trace-cmp
+build:fuzztest-experimental --per_file_copt=common/.*,fuzztest/.*,centipede/.*,-centipede/.*fuzz_target,googletest/.*,googlemock/.*@-fsanitize-coverage=0
+