Generate Rust bindings that match Bazel-built V8 archives (#57644)

## Why

Pre-generated bindings can disagree with native V8 layouts, including CppGC member storage and the inline typed-array size. Source archives need bindings generated with the same headers, defines, and target configuration.

## What changed

- Generate bindings through Bazel using the archive's C++ compilation metadata, and include them in Darwin and Linux release pairs and source builds.
- Select native Windows MSVC archives and matching bindings together with `--//:rusty_v8_from_source=true`, and generate target-specific Windows GNU bindings.
- Pin a corrected `rusty_v8` revision for Cargo and Bazel, and track native Windows LLVM tools and resources as action inputs so pin changes invalidate cached actions.
- Run release and canary Cargo smoke tests with explicit target triples, required Linux linkers, and `--include-ignored`.

## Testing

Add `codex-v8-poc` coverage for CppGC member size, alignment, tracing, and weak references; typed-array contents and backing-store promotion; and microtask queues across garbage collection and context reassignment. Enable the otherwise ignored CppGC ABI checks for Bazel source builds and staged release smoke tests.

GitOrigin-RevId: 9edfa057a0ef2e323543bb8132c070d336ded1b2

third_party/v8/BUILD.bazel

@@ -2,6 +2,7 @@ load("@@//third_party/v8:artifact_profile.bzl", "v8_artifact_files")
 load("@bazel_skylib//rules:copy_file.bzl", "copy_file")
 load("@rules_cc//cc:cc_static_library.bzl", "cc_static_library")
 load("@rules_cc//cc:defs.bzl", "cc_library")
+load("@rules_rs//rs:rules_rust_bindgen.bzl", "rust_bindgen")
 
 package(default_visibility = ["//visibility:public"])
 
@@ -93,20 +94,6 @@ alias(
     actual = ":v8_152_2_0_x86_64_pc_windows_gnullvm_bazel",
 )
 
-alias(
-    name = "src_binding_release_x86_64_pc_windows_gnullvm_152_2_0_release",
-    # `rusty_v8` does not publish a Windows GNU binding file. The generated
-    # binding only describes this V8 release's C++ API surface, so reuse the
-    # Linux release binding while the windows-gnullvm archive build is still
-    # experimental.
-    actual = ":src_binding_release_x86_64_unknown_linux_gnu_152_2_0_release",
-)
-
-alias(
-    name = "src_binding_release_aarch64_pc_windows_gnullvm_152_2_0_release",
-    actual = ":src_binding_release_aarch64_unknown_linux_gnu_152_2_0_release",
-)
-
 # Both ordinary consumers and source consumers use the current sandbox ABI.
 # Switch the archive and binding together for source instrumentation. The same
 # root setting is visible in the @v8_targets copy used by rules_rs.
@@ -176,14 +163,14 @@ alias(
     actual = select({
         "@rules_rs//rs/platforms/config:aarch64-apple-darwin": ":v8_152_2_0_aarch64_apple_darwin_bazel",
         "@rules_rs//rs/platforms/config:aarch64-pc-windows-gnullvm": ":v8_152_2_0_aarch64_pc_windows_gnullvm",
-        "@rules_rs//rs/platforms/config:aarch64-pc-windows-msvc": ":v8_152_2_0_aarch64_pc_windows_msvc",
+        "@rules_rs//rs/platforms/config:aarch64-pc-windows-msvc": ":v8_152_2_0_aarch64_pc_windows_msvc_bazel",
         "@rules_rs//rs/platforms/config:aarch64-unknown-linux-gnu": ":v8_152_2_0_aarch64_unknown_linux_gnu_bazel",
         # Rust's compiler-builtins archive does not supply V8's __clear_cache.
         # Use the merged archive containing the ARM64 compiler-rt builtins.
         ":platform_aarch64_unknown_linux_musl": ":v8_152_2_0_aarch64_unknown_linux_musl_release",
         "@rules_rs//rs/platforms/config:x86_64-apple-darwin": ":v8_152_2_0_x86_64_apple_darwin_bazel",
         "@rules_rs//rs/platforms/config:x86_64-pc-windows-gnullvm": ":v8_152_2_0_x86_64_pc_windows_gnullvm",
-        "@rules_rs//rs/platforms/config:x86_64-pc-windows-msvc": ":v8_152_2_0_x86_64_pc_windows_msvc",
+        "@rules_rs//rs/platforms/config:x86_64-pc-windows-msvc": ":v8_152_2_0_x86_64_pc_windows_msvc_bazel",
         "@rules_rs//rs/platforms/config:x86_64-unknown-linux-gnu": ":v8_152_2_0_x86_64_unknown_linux_gnu_bazel",
         ":platform_x86_64_unknown_linux_musl": ":v8_152_2_0_x86_64_unknown_linux_musl_release",
         "//conditions:default": ":v8_152_2_0_x86_64_unknown_linux_gnu_bazel",
@@ -216,17 +203,17 @@ alias(
 alias(
     name = "rusty_v8_source_binding_for_target",
     actual = select({
-        "@rules_rs//rs/platforms/config:aarch64-apple-darwin": ":src_binding_release_aarch64_apple_darwin_152_2_0_release",
-        "@rules_rs//rs/platforms/config:aarch64-pc-windows-gnullvm": ":src_binding_release_aarch64_pc_windows_gnullvm_152_2_0_release",
-        "@rules_rs//rs/platforms/config:aarch64-pc-windows-msvc": ":src_binding_release_aarch64_pc_windows_msvc_152_2_0_release",
-        "@rules_rs//rs/platforms/config:aarch64-unknown-linux-gnu": ":src_binding_release_aarch64_unknown_linux_gnu_152_2_0_release",
-        ":platform_aarch64_unknown_linux_musl": ":src_binding_release_aarch64_unknown_linux_musl_152_2_0_release",
-        "@rules_rs//rs/platforms/config:x86_64-apple-darwin": ":src_binding_release_x86_64_apple_darwin_152_2_0_release",
-        "@rules_rs//rs/platforms/config:x86_64-pc-windows-gnullvm": ":src_binding_release_x86_64_pc_windows_gnullvm_152_2_0_release",
-        "@rules_rs//rs/platforms/config:x86_64-pc-windows-msvc": ":src_binding_release_x86_64_pc_windows_msvc_152_2_0_release",
-        "@rules_rs//rs/platforms/config:x86_64-unknown-linux-gnu": ":src_binding_release_x86_64_unknown_linux_gnu_152_2_0_release",
-        ":platform_x86_64_unknown_linux_musl": ":src_binding_release_x86_64_unknown_linux_musl_152_2_0_release",
-        "//conditions:default": ":src_binding_release_x86_64_unknown_linux_gnu_152_2_0_release",
+        "@rules_rs//rs/platforms/config:aarch64-apple-darwin": ":src_binding_aarch64_apple_darwin_152_2_0_bazel",
+        "@rules_rs//rs/platforms/config:aarch64-pc-windows-gnullvm": ":src_binding_aarch64_pc_windows_gnullvm_152_2_0_bazel",
+        "@rules_rs//rs/platforms/config:aarch64-pc-windows-msvc": ":src_binding_aarch64_pc_windows_msvc_152_2_0_bazel",
+        "@rules_rs//rs/platforms/config:aarch64-unknown-linux-gnu": ":src_binding_aarch64_unknown_linux_gnu_152_2_0_bazel",
+        ":platform_aarch64_unknown_linux_musl": ":src_binding_aarch64_unknown_linux_musl_152_2_0_bazel",
+        "@rules_rs//rs/platforms/config:x86_64-apple-darwin": ":src_binding_x86_64_apple_darwin_152_2_0_bazel",
+        "@rules_rs//rs/platforms/config:x86_64-pc-windows-gnullvm": ":src_binding_x86_64_pc_windows_gnullvm_152_2_0_bazel",
+        "@rules_rs//rs/platforms/config:x86_64-pc-windows-msvc": ":src_binding_x86_64_pc_windows_msvc_152_2_0_bazel",
+        "@rules_rs//rs/platforms/config:x86_64-unknown-linux-gnu": ":src_binding_x86_64_unknown_linux_gnu_152_2_0_bazel",
+        ":platform_x86_64_unknown_linux_musl": ":src_binding_x86_64_unknown_linux_musl_152_2_0_bazel",
+        "//conditions:default": ":src_binding_x86_64_unknown_linux_gnu_152_2_0_bazel",
     }),
 )
 
@@ -420,6 +407,184 @@ alias(
     tags = ["manual"],
 )
 
+# Bindgen reads the same CcInfo as the C++ archive. Pass local libc++ options
+# explicitly because CcInfo propagates defines and headers, but not copts.
+cc_library(
+    name = "binding_headers_152_2_0",
+    hdrs = [
+        "@v8_crate_152_2_0//:binding_hpp",
+        "@v8_crate_152_2_0//:support_h",
+    ],
+    tags = ["manual"],
+    # Bindgen asks the toolchain for C flags, which omit its C++ header search
+    # paths. Source profiles use the workspace headers; release profiles get
+    # their pinned Chromium headers from the profiled binding dependency.
+    deps = [":v8_152_2_0_binding"] + select({
+        ":use_rusty_v8_custom_libcxx": [],
+        "@platforms//os:osx": [],
+        "//conditions:default": [
+            "@llvm-project//libcxx:headers",
+            "@llvm-project//libcxxabi:headers",
+        ],
+    }),
+)
+
+rust_bindgen(
+    name = "binding_generated_152_2_0",
+    bindgen_flags = [
+        "--generate-cstr",
+        "--rustified-enum=.*UseCounterFeature",
+        "--rustified-enum=.*ModuleImportPhase",
+        "--rustified-enum=.*Intercepted",
+        "--bitfield-enum=.*GCType",
+        "--bitfield-enum=.*GCCallbackFlags",
+        "--allowlist-item=v8__.*",
+        "--allowlist-item=cppgc__.*",
+        "--allowlist-item=RustObj",
+        "--allowlist-item=memory_span_t",
+        "--allowlist-item=const_memory_span_t",
+        "--allowlist-item=ExternalConstOneByteStringResource",
+        "--blocklist-item=cppgc.*Visitor",
+        "--blocklist-item=RustObj.*Trace",
+    ],
+    cc_lib = ":binding_headers_152_2_0",
+    clang_flags = [
+        "-x",
+        "c++",
+        "-std=c++20",
+    ] + V8_CUSTOM_LIBCXX_COPTS + select({
+        # Match the C++ toolchain. Bindgen asks for C flags and otherwise
+        # enables C++20 modules, for which the macOS SDK's types are cyclic.
+        "@platforms//os:osx": [
+            "-Xclang",
+            "-fno-cxx-modules",
+        ],
+        "//conditions:default": [],
+    }) + select({
+        "@rules_rs//rs/platforms/config:aarch64-apple-darwin": ["--target=arm64-apple-darwin"],
+        "@rules_rs//rs/platforms/config:aarch64-pc-windows-gnullvm": ["--target=aarch64-w64-windows-gnu"],
+        "@rules_rs//rs/platforms/config:aarch64-pc-windows-msvc": ["--target=aarch64-pc-windows-msvc"],
+        "@llvm//platforms/config:linux_aarch64": ["--target=aarch64-unknown-linux-gnu"],
+        ":platform_aarch64_unknown_linux_musl": ["--target=aarch64-unknown-linux-musl"],
+        "@rules_rs//rs/platforms/config:x86_64-apple-darwin": ["--target=x86_64-apple-darwin"],
+        "@rules_rs//rs/platforms/config:x86_64-pc-windows-gnullvm": ["--target=x86_64-w64-windows-gnu"],
+        "@rules_rs//rs/platforms/config:x86_64-pc-windows-msvc": ["--target=x86_64-pc-windows-msvc"],
+        "@llvm//platforms/config:linux_x86_64": ["--target=x86_64-unknown-linux-gnu"],
+        ":platform_x86_64_unknown_linux_musl": ["--target=x86_64-unknown-linux-musl"],
+    }),
+    header = "@v8_crate_152_2_0//:binding_hpp",
+    tags = ["manual"],
+)
+
+v8_artifact_files(
+    name = "src_binding_aarch64_pc_windows_msvc_152_2_0_bazel",
+    srcs = [":binding_generated_152_2_0"],
+    profile = "sandbox_release",
+    tags = ["manual"],
+    target_compatible_with = [
+        "@platforms//cpu:aarch64",
+        "@platforms//os:windows",
+        "@llvm//constraints/windows/abi:msvc",
+    ],
+    v8_cpu = "arm64",
+)
+
+v8_artifact_files(
+    name = "src_binding_x86_64_pc_windows_msvc_152_2_0_bazel",
+    srcs = [":binding_generated_152_2_0"],
+    profile = "sandbox_release",
+    tags = ["manual"],
+    target_compatible_with = [
+        "@platforms//cpu:x86_64",
+        "@platforms//os:windows",
+        "@llvm//constraints/windows/abi:msvc",
+    ],
+    v8_cpu = "x64",
+)
+
+v8_artifact_files(
+    name = "src_binding_aarch64_pc_windows_gnullvm_152_2_0_bazel",
+    srcs = [":binding_generated_152_2_0"],
+    profile = "source",
+    tags = ["manual"],
+    target_compatible_with = [
+        "@platforms//cpu:aarch64",
+        "@platforms//os:windows",
+        "@llvm//constraints/windows/abi:gnullvm",
+    ],
+    v8_cpu = "arm64",
+)
+
+v8_artifact_files(
+    name = "src_binding_x86_64_pc_windows_gnullvm_152_2_0_bazel",
+    srcs = [":binding_generated_152_2_0"],
+    profile = "source",
+    tags = ["manual"],
+    target_compatible_with = [
+        "@platforms//cpu:x86_64",
+        "@platforms//os:windows",
+        "@llvm//constraints/windows/abi:gnullvm",
+    ],
+    v8_cpu = "x64",
+)
+
+v8_artifact_files(
+    name = "src_binding_aarch64_apple_darwin_152_2_0_bazel",
+    srcs = [":binding_generated_152_2_0"],
+    profile = "source",
+    tags = ["manual"],
+    v8_cpu = "arm64",
+)
+
+v8_artifact_files(
+    name = "src_binding_x86_64_apple_darwin_152_2_0_bazel",
+    srcs = [":binding_generated_152_2_0"],
+    profile = "source",
+    tags = ["manual"],
+    v8_cpu = "x64",
+)
+
+v8_artifact_files(
+    name = "src_binding_aarch64_unknown_linux_gnu_152_2_0_bazel",
+    srcs = [":binding_generated_152_2_0"],
+    profile = "source",
+    tags = ["manual"],
+    v8_cpu = "arm64",
+)
+
+v8_artifact_files(
+    name = "src_binding_x86_64_unknown_linux_gnu_152_2_0_bazel",
+    srcs = [":binding_generated_152_2_0"],
+    profile = "source",
+    tags = ["manual"],
+    v8_cpu = "x64",
+)
+
+v8_artifact_files(
+    name = "src_binding_aarch64_unknown_linux_musl_152_2_0_bazel",
+    srcs = [":binding_generated_152_2_0"],
+    profile = "source",
+    tags = ["manual"],
+    v8_cpu = "arm64",
+)
+
+v8_artifact_files(
+    name = "src_binding_x86_64_unknown_linux_musl_152_2_0_bazel",
+    srcs = [":binding_generated_152_2_0"],
+    profile = "source",
+    tags = ["manual"],
+    v8_cpu = "x64",
+)
+
+alias(
+    name = "rusty_v8_native_windows_binding_for_target",
+    actual = select({
+        "@rules_rs//rs/platforms/config:aarch64-pc-windows-msvc": ":src_binding_aarch64_pc_windows_msvc_152_2_0_bazel",
+        "@rules_rs//rs/platforms/config:x86_64-pc-windows-msvc": ":src_binding_x86_64_pc_windows_msvc_152_2_0_bazel",
+    }),
+    tags = ["manual"],
+)
+
 cc_static_library(
     name = "_v8_152_2_0_aarch64_apple_darwin_bazel",
     features = V8_STATIC_LIBRARY_FEATURES,
@@ -541,51 +706,11 @@ cc_static_library(
     ]
 ]
 
-filegroup(
-    name = "src_binding_release_aarch64_apple_darwin_152_2_0_release",
-    srcs = ["@v8_crate_152_2_0//:src_binding_release_aarch64_apple_darwin"],
-)
-
-filegroup(
-    name = "src_binding_release_x86_64_apple_darwin_152_2_0_release",
-    srcs = ["@v8_crate_152_2_0//:src_binding_release_x86_64_apple_darwin"],
-)
-
-filegroup(
-    name = "src_binding_release_aarch64_unknown_linux_gnu_152_2_0_release",
-    srcs = ["@v8_crate_152_2_0//:src_binding_release_aarch64_unknown_linux_gnu"],
-)
-
-filegroup(
-    name = "src_binding_release_x86_64_unknown_linux_gnu_152_2_0_release",
-    srcs = ["@v8_crate_152_2_0//:src_binding_release_x86_64_unknown_linux_gnu"],
-)
-
-filegroup(
-    name = "src_binding_release_aarch64_unknown_linux_musl_152_2_0_release",
-    srcs = ["@v8_crate_152_2_0//:src_binding_release_aarch64_unknown_linux_gnu"],
-)
-
-filegroup(
-    name = "src_binding_release_x86_64_unknown_linux_musl_152_2_0_release",
-    srcs = ["@v8_crate_152_2_0//:src_binding_release_x86_64_unknown_linux_gnu"],
-)
-
-alias(
-    name = "src_binding_release_aarch64_pc_windows_msvc_152_2_0_release",
-    actual = "@rusty_v8_152_2_0_aarch64_pc_windows_msvc_binding//file",
-)
-
-alias(
-    name = "src_binding_release_x86_64_pc_windows_msvc_152_2_0_release",
-    actual = "@rusty_v8_152_2_0_x86_64_pc_windows_msvc_binding//file",
-)
-
 v8_artifact_files(
     name = "rusty_v8_release_pair_x86_64_apple_darwin",
     srcs = [
         ":_v8_152_2_0_x86_64_apple_darwin_bazel",
-        ":src_binding_release_x86_64_apple_darwin_152_2_0_release",
+        ":binding_generated_152_2_0",
     ],
     profile = "release",
     v8_cpu = "x64",
@@ -595,7 +720,7 @@ v8_artifact_files(
     name = "rusty_v8_release_pair_aarch64_apple_darwin",
     srcs = [
         ":_v8_152_2_0_aarch64_apple_darwin_bazel",
-        ":src_binding_release_aarch64_apple_darwin_152_2_0_release",
+        ":binding_generated_152_2_0",
     ],
     profile = "release",
     v8_cpu = "arm64",
@@ -605,7 +730,7 @@ v8_artifact_files(
     name = "rusty_v8_release_pair_x86_64_unknown_linux_gnu",
     srcs = [
         ":_v8_152_2_0_x86_64_unknown_linux_gnu_bazel",
-        ":src_binding_release_x86_64_unknown_linux_gnu_152_2_0_release",
+        ":binding_generated_152_2_0",
     ],
     profile = "release",
     v8_cpu = "x64",
@@ -615,7 +740,7 @@ v8_artifact_files(
     name = "rusty_v8_release_pair_aarch64_unknown_linux_gnu",
     srcs = [
         ":_v8_152_2_0_aarch64_unknown_linux_gnu_bazel",
-        ":src_binding_release_aarch64_unknown_linux_gnu_152_2_0_release",
+        ":binding_generated_152_2_0",
     ],
     profile = "release",
     v8_cpu = "arm64",
@@ -625,7 +750,7 @@ v8_artifact_files(
     name = "rusty_v8_release_pair_x86_64_unknown_linux_musl",
     srcs = [
         ":_v8_152_2_0_x86_64_unknown_linux_musl_release",
-        ":src_binding_release_x86_64_unknown_linux_musl_152_2_0_release",
+        ":binding_generated_152_2_0",
     ],
     profile = "release",
     v8_cpu = "x64",
@@ -635,7 +760,7 @@ v8_artifact_files(
     name = "rusty_v8_release_pair_aarch64_unknown_linux_musl",
     srcs = [
         ":_v8_152_2_0_aarch64_unknown_linux_musl_release",
-        ":src_binding_release_aarch64_unknown_linux_musl_152_2_0_release",
+        ":binding_generated_152_2_0",
     ],
     profile = "release",
     v8_cpu = "arm64",
@@ -644,16 +769,16 @@ v8_artifact_files(
 filegroup(
     name = "rusty_v8_release_pair_x86_64_pc_windows_msvc",
     srcs = [
-        ":src_binding_release_x86_64_pc_windows_msvc_152_2_0_release",
         ":v8_152_2_0_x86_64_pc_windows_msvc",
+        "@rusty_v8_152_2_0_x86_64_pc_windows_msvc_binding//file",
     ],
 )
 
 filegroup(
     name = "rusty_v8_release_pair_aarch64_pc_windows_msvc",
     srcs = [
-        ":src_binding_release_aarch64_pc_windows_msvc_152_2_0_release",
         ":v8_152_2_0_aarch64_pc_windows_msvc",
+        "@rusty_v8_152_2_0_aarch64_pc_windows_msvc_binding//file",
     ],
 )
 
@@ -661,7 +786,7 @@ v8_artifact_files(
     name = "rusty_v8_sandbox_release_pair_x86_64_apple_darwin",
     srcs = [
         ":_v8_152_2_0_x86_64_apple_darwin_bazel",
-        ":src_binding_release_x86_64_apple_darwin_152_2_0_release",
+        ":binding_generated_152_2_0",
     ],
     profile = "sandbox_release",
     v8_cpu = "x64",
@@ -671,7 +796,7 @@ v8_artifact_files(
     name = "rusty_v8_sandbox_release_pair_aarch64_apple_darwin",
     srcs = [
         ":_v8_152_2_0_aarch64_apple_darwin_bazel",
-        ":src_binding_release_aarch64_apple_darwin_152_2_0_release",
+        ":binding_generated_152_2_0",
     ],
     profile = "sandbox_release",
     v8_cpu = "arm64",
@@ -681,7 +806,7 @@ v8_artifact_files(
     name = "rusty_v8_sandbox_release_pair_x86_64_unknown_linux_gnu",
     srcs = [
         ":_v8_152_2_0_x86_64_unknown_linux_gnu_bazel",
-        ":src_binding_release_x86_64_unknown_linux_gnu_152_2_0_release",
+        ":binding_generated_152_2_0",
     ],
     profile = "sandbox_release",
     v8_cpu = "x64",
@@ -691,7 +816,7 @@ v8_artifact_files(
     name = "rusty_v8_sandbox_release_pair_aarch64_unknown_linux_gnu",
     srcs = [
         ":_v8_152_2_0_aarch64_unknown_linux_gnu_bazel",
-        ":src_binding_release_aarch64_unknown_linux_gnu_152_2_0_release",
+        ":binding_generated_152_2_0",
     ],
     profile = "sandbox_release",
     v8_cpu = "arm64",
@@ -701,7 +826,7 @@ v8_artifact_files(
     name = "rusty_v8_sandbox_release_pair_x86_64_unknown_linux_musl",
     srcs = [
         ":_v8_152_2_0_x86_64_unknown_linux_musl_release",
-        ":src_binding_release_x86_64_unknown_linux_musl_152_2_0_release",
+        ":binding_generated_152_2_0",
     ],
     profile = "sandbox_release",
     v8_cpu = "x64",
@@ -711,7 +836,7 @@ v8_artifact_files(
     name = "rusty_v8_sandbox_release_pair_aarch64_unknown_linux_musl",
     srcs = [
         ":_v8_152_2_0_aarch64_unknown_linux_musl_release",
-        ":src_binding_release_aarch64_unknown_linux_musl_152_2_0_release",
+        ":binding_generated_152_2_0",
     ],
     profile = "sandbox_release",
     v8_cpu = "arm64",

third_party/v8/README.md

@@ -6,7 +6,7 @@ Bazel consumer builds use:
 - Codex-published sandbox archive/binding pairs on Darwin, GNU/musl Linux,
   and Windows MSVC (x64 and arm64), with checksums pinned from the trusted
   release manifests
-- source-built V8 archives on Windows GNU
+- source-built V8 archives and matching generated bindings on Windows GNU
 
 Local Cargo builds still use upstream prebuilt `rusty_v8` archives by default.
 Selected Cargo CI, release, and package builds override
@@ -15,14 +15,17 @@ sets those variables independently in `MODULE.bazel`, selecting the pair above
 for its consumers. All Bazel compilation modes use the same published V8
 release archive on supported platforms.
 
-The Bazel `v8` crate feature selection enables V8's in-process sandbox.
-Darwin/Linux consumers use the matching published pair by default.
-For a source build use `--//:rusty_v8_from_source=true`; both archive and
-bindings then come from the source path. Source targets enforce the workspace
-runtime and sandbox/pointer-compression ABI. Release-pair targets enforce either
-the legacy or the sandbox ABI plus Chromium's pinned runtime. Target CPU follows
-the named artifact. The underlying V8 settings are internal, and callers do
-not pass separate V8 feature or libc++ flags.
+The Bazel `v8` crate and its native source targets enable V8's in-process
+sandbox and pointer compression. For instrumentation, use
+`--//:rusty_v8_from_source=true`: on Darwin, Linux and native Windows MSVC
+the archive and bindings both come from source instead of the pinned published
+sandbox pair. The published archive cannot incorporate native debug or sanitizer
+settings.
+
+Source targets enforce the workspace runtime and sandbox/pointer-compression
+ABI. Release-pair targets enforce either the legacy or sandbox ABI plus
+Chromium's pinned runtime. Target CPU follows the named artifact. These V8
+settings are internal; callers do not pass separate V8 feature or libc++ flags.
 
 Current pinned versions:
 
@@ -130,20 +133,25 @@ This depends on libc++'s shared exception-object ABI; updates to either libc++
 revision must keep the native GNU link/runtime checks passing. The Bazel pair targets above still point directly to source
 targets so a new release or canary never depends on an older published copy.
 
-Native Windows x64 and ARM64 hosts can build sandbox archives with pinned
-clang-cl and the installed Microsoft SDK using
+Native Windows x64 and ARM64 hosts can build sandbox archives and matching
+Rust bindings with pinned clang-cl and the installed Microsoft SDK using
 `//third_party/v8:v8_152_2_0_x86_64_pc_windows_msvc_bazel` and
 `//third_party/v8:v8_152_2_0_aarch64_pc_windows_msvc_bazel`.
-`//third_party/v8:rusty_v8_native_windows_archive_for_target` selects these source
-outputs directly. These targets bundle Chromium libc++ and compiler builtins,
-and fix pointer compression and sandboxing to the published Windows contract.
-The owned engine policy also preserves the GN MSVC defaults for GC-managed
-microtask queues, random Wasm module generation, disabled imminent-deprecation
-warnings, and external TypedArray backing stores. Other source targets retain
-the published Unix policy, including a 64-byte inline TypedArray threshold.
-These are fixed platform choices, not additional developer build switches.
-Matching generated Rust bindings, consumer selection, and publishing integration
-are added separately; existing MSVC consumers continue using the prebuilt pair.
+The producer selectors `//third_party/v8:rusty_v8_native_windows_archive_for_target`
+and `//third_party/v8:rusty_v8_native_windows_binding_for_target` select source
+outputs directly. Both use the same sandbox, pointer compression, target CPU,
+and Chromium libc++ profile. The bindings use V8's compiled headers and defines
+so their sizes follow the archive, including CppGC members. Default MSVC
+consumers keep the published pair; `--//:rusty_v8_from_source=true` selects
+the newly built archive and bindings together.
+
+The owned engine policy preserves the GN MSVC defaults for GC-managed microtask
+queues, random Wasm module generation, disabled imminent-deprecation warnings,
+and external TypedArray backing stores. Other source targets retain the published
+Unix policy, including a 64-byte inline TypedArray threshold. Generated Rust
+bindings use that same threshold; never pair a native 64-byte threshold with
+GN's size-zero binding constant. These are fixed platform choices, not additional
+developer build switches.
 
 Use a native Visual Studio Developer PowerShell with the C++ tools and Windows
 SDK available. The SDK supplies headers, libraries, `dumpbin.exe`, and the
@@ -152,7 +160,8 @@ assembler. From the repo root, build the archive for that host:
 ```powershell
 bazel build --config=ci-windows-msvc `
   --host_platform=//:local_windows_msvc --platforms=//:local_windows_msvc `
-  //third_party/v8:rusty_v8_native_windows_archive_for_target
+  //third_party/v8:rusty_v8_native_windows_archive_for_target `
+  //third_party/v8:rusty_v8_native_windows_binding_for_target
 ```
 
 Bazel fetches and verifies LLVM 22.1.8 for the host, the same major and patch

third_party/v8/native_windows.bzl

@@ -32,6 +32,24 @@ package(default_visibility = ["//visibility:public"])
 exports_files(["BUILD.bazel"])
 filegroup(name = "llvm-readobj", srcs = glob(["bin/llvm-readobj.exe"], allow_empty = True))
 filegroup(name = "llvm-lib", srcs = glob(["bin/llvm-lib.exe"], allow_empty = True))
+# Tool paths alone do not invalidate cached C++ actions when the pin changes.
+# Keep compiler resources and bundled runtime DLLs in the toolchain inputs.
+filegroup(
+    name = "compiler_files",
+    srcs = glob(["bin/clang-cl.exe", "bin/*.dll", "lib/clang/*/include/**"], allow_empty = True),
+)
+filegroup(
+    name = "linker_files",
+    srcs = glob(["bin/lld-link.exe", "bin/*.dll"], allow_empty = True),
+)
+filegroup(
+    name = "archiver_files",
+    srcs = glob(["bin/llvm-lib.exe", "bin/*.dll"], allow_empty = True),
+)
+filegroup(
+    name = "all_files",
+    srcs = [":compiler_files", ":linker_files", ":archiver_files"],
+)
 [
     filegroup(
         name = "builtins_" + arch,

third_party/v8/v8_crate.BUILD.bazel

@@ -5,6 +5,11 @@ filegroup(
     srcs = ["src/binding.cc"],
 )
 
+filegroup(
+    name = "binding_hpp",
+    srcs = ["src/binding.hpp"],
+)
+
 filegroup(
     name = "crdtp_binding_cc",
     srcs = ["src/crdtp_binding.cc"],
@@ -14,33 +19,3 @@ filegroup(
     name = "support_h",
     srcs = ["src/support.h"],
 )
-
-filegroup(
-    name = "src_binding_release_aarch64_apple_darwin",
-    srcs = ["gen/src_binding_release_aarch64-apple-darwin.rs"],
-)
-
-filegroup(
-    name = "src_binding_release_x86_64_apple_darwin",
-    srcs = ["gen/src_binding_release_x86_64-apple-darwin.rs"],
-)
-
-filegroup(
-    name = "src_binding_release_aarch64_unknown_linux_gnu",
-    srcs = ["gen/src_binding_release_aarch64-unknown-linux-gnu.rs"],
-)
-
-filegroup(
-    name = "src_binding_release_x86_64_unknown_linux_gnu",
-    srcs = ["gen/src_binding_release_x86_64-unknown-linux-gnu.rs"],
-)
-
-filegroup(
-    name = "src_binding_release_x86_64_pc_windows_msvc",
-    srcs = ["gen/src_binding_release_x86_64-pc-windows-msvc.rs"],
-)
-
-filegroup(
-    name = "src_binding_release_aarch64_pc_windows_msvc",
-    srcs = ["gen/src_binding_release_aarch64-pc-windows-msvc.rs"],
-)