Files
codex/patches/rules_cc_windows_native_llvm.patch
T
Sean Huang d63fe536ee 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
2026-10-28 04:48:23 +00:00

110 lines
4.4 KiB
Diff

# Reuse rules_cc's installed SDK setup with an explicitly declared LLVM repo.
# Only the V8 repository has native_llvm; ordinary local_config_cc keeps its
# installed compiler and input files. Track the fetched LLVM tools and resources
# as action inputs so changes to the pin invalidate cached compilation and links.
diff --git a/cc/private/toolchain/windows_cc_configure.bzl b/cc/private/toolchain/windows_cc_configure.bzl
--- a/cc/private/toolchain/windows_cc_configure.bzl
+++ b/cc/private/toolchain/windows_cc_configure.bzl
@@ -539,6 +539,12 @@
The path to the LLVM installation, or None if not found.
"""
+ # Codex's opt-in V8 toolchain supplies a Bazel-fetched compiler.
+ # Ordinary cc_autoconf repositories have no such attribute.
+ llvm_label = getattr(repository_ctx.attr, "native_llvm", None)
+ if llvm_label:
+ return str(repository_ctx.path(llvm_label).dirname).replace("/", "\\")
+
# 1. Check if BAZEL_LLVM is already set by user.
bazel_llvm = _get_path_env_var(repository_ctx, "BAZEL_LLVM")
if bazel_llvm:
@@ -602,7 +608,7 @@
def _use_clang_cl(repository_ctx):
"""Returns True if USE_CLANG_CL is set to 1."""
- return _get_env_var(repository_ctx, "USE_CLANG_CL", default = "0") == "1"
+ return getattr(repository_ctx.attr, "native_llvm", None) != None or _get_env_var(repository_ctx, "USE_CLANG_CL", default = "0") == "1"
def _find_missing_llvm_tools(repository_ctx, llvm_path):
"""Check if any required tool is missing under given LLVM path."""
@@ -716,6 +722,7 @@
build_tools["CL"] = find_llvm_tool(repository_ctx, llvm_path, "clang-cl.exe")
build_tools["ML"] = find_msvc_tool(repository_ctx, vc_path, "ml64.exe", "x64")
+ build_tools["DUMPBIN"] = find_msvc_tool(repository_ctx, vc_path, "dumpbin.exe", target_arch)
build_tools["LINK"] = find_llvm_tool(repository_ctx, llvm_path, "lld-link.exe")
if not build_tools["LINK"]:
build_tools["LINK"] = find_msvc_tool(repository_ctx, vc_path, "link.exe", "x64")
@@ -923,6 +930,12 @@
)
template_vars = dict()
+ native_llvm = getattr(repository_ctx.attr, "native_llvm", None)
+ for group in ["compiler_files", "linker_files", "archiver_files", "all_files"]:
+ files = [str(native_llvm.same_package_label(group))] if native_llvm else []
+ if native_llvm and group == "all_files":
+ files.append(":msvc_compiler_files")
+ template_vars["%{native_llvm_" + group + "}"] = repr(files)
msvc_vars_x64 = _get_msvc_vars(repository_ctx, paths, "x64")
template_vars.update(msvc_vars_x64)
template_vars.update(_get_clang_cl_vars(repository_ctx, paths, msvc_vars_x64, "x64"))
diff --git a/cc/private/toolchain/BUILD.windows.tpl b/cc/private/toolchain/BUILD.windows.tpl
--- a/cc/private/toolchain/BUILD.windows.tpl
+++ b/cc/private/toolchain/BUILD.windows.tpl
@@ -67,7 +67,22 @@
"%{msvc_deps_scanner_wrapper_path_x64}",
"%{msvc_deps_scanner_wrapper_path_arm}",
"%{msvc_deps_scanner_wrapper_path_arm64}",
- ]
+ ] + %{native_llvm_compiler_files}
+)
+
+filegroup(
+ name = "msvc_all_files",
+ srcs = %{native_llvm_all_files},
+)
+
+filegroup(
+ name = "msvc_linker_files",
+ srcs = %{native_llvm_linker_files},
+)
+
+filegroup(
+ name = "msvc_archiver_files",
+ srcs = %{native_llvm_archiver_files},
)
# Hardcoded toolchain, legacy behaviour.
@@ -301,12 +316,12 @@
name = "cc-compiler-x64_windows",
toolchain_identifier = "msvc_x64",
toolchain_config = ":msvc_x64",
- all_files = ":empty",
- ar_files = ":empty",
+ all_files = ":msvc_all_files",
+ ar_files = ":msvc_archiver_files",
as_files = ":msvc_compiler_files",
compiler_files = ":msvc_compiler_files",
dwp_files = ":empty",
- linker_files = ":empty",
+ linker_files = ":msvc_linker_files",
objcopy_files = ":empty",
strip_files = ":empty",
supports_param_files = 1,
@@ -526,12 +541,12 @@
name = "cc-compiler-arm64_windows",
toolchain_identifier = "msvc_arm64",
toolchain_config = ":msvc_arm64",
- all_files = ":empty",
- ar_files = ":empty",
+ all_files = ":msvc_all_files",
+ ar_files = ":msvc_archiver_files",
as_files = ":msvc_compiler_files",
compiler_files = ":msvc_compiler_files",
dwp_files = ":empty",
- linker_files = ":empty",
+ linker_files = ":msvc_linker_files",
objcopy_files = ":empty",
strip_files = ":empty",
supports_param_files = 1,