build: use common source and local toolchain when building wee8.

While there, backport a small fix from upstream.

Signed-off-by: Piotr Sikora <[email protected]>

.circleci/config.yml

@@ -73,10 +73,12 @@ jobs:
 
    macos:
      macos:
-       xcode: "10.2.1"
+       xcode: "11.0.0"
      environment:
        BAZEL_BUILD_EXTRA_OPTIONS: "--define wasm=v8" # v8 only, WAVM segfaults in tests.
        BAZEL_TEST_TARGETS: "//test/extensions/access_loggers/wasm/... //test/extensions/filters/http/wasm/... //test/extensions/wasm/..."
+       CC: clang
+       CXX: clang++
      steps:
        - run: sudo sntp -sS time.apple.com
        - run: rm -rf /home/circleci/project/.git # CircleCI git caching is likely broken

bazel/BUILD

@@ -214,16 +214,6 @@ alias(
     }),
 )
 
-# Alias pointing to a platform-specific version of wee8.
-alias(
-    name = "wee8",
-    actual = select({
-        ":darwin": "@wee8_macos//:wee8",
-        ":darwin_x86_64": "@wee8_macos//:wee8",
-        "//conditions:default": "@wee8_linux//:wee8",
-    }),
-)
-
 config_setting(
     name = "linux_x86_64",
     values = {"cpu": "k8"},

bazel/external/wee8.genrule_cmd

@@ -16,7 +16,7 @@ pushd $$ROOT/wee8
 rm -rf out/wee8
 
 # Build wee8.
-third_party/depot_tools/gn gen out/wee8 --args="v8_use_external_startup_data=false v8_enable_i18n_support=false v8_enable_gdbjit=false v8_expose_symbols=true is_component_build=false is_debug=false use_sysroot=false use_custom_libcxx=false"
+AR=ar NM=nm third_party/depot_tools/gn gen out/wee8 --args='v8_use_external_startup_data=false v8_enable_i18n_support=false v8_enable_gdbjit=false v8_expose_symbols=true is_component_build=false is_debug=false clang_use_chrome_plugins=false use_sysroot=false use_custom_libcxx=false custom_toolchain="//build/toolchain/linux/unbundle:default"'
 third_party/depot_tools/ninja -C out/wee8 wee8
 
 # Move compiled library to the expected destinations.

bazel/external/wee8.patch

@@ -1,6 +1,28 @@
 # 1. Fix handling of f64 globals.
 # 2. Force full GC when destroying VMs.
 # 3. Fix build with -DDEBUG.
+# 4. Fix for VMs with overlapping lifetimes (https://crrev.com/c/1698387).
+# 5. Fix linking with unbundled toolchain on macOS.
+--- a/wee8/build/toolchain/gcc_toolchain.gni
++++ b/wee8/build/toolchain/gcc_toolchain.gni
+@@ -355,6 +355,8 @@
+         # AIX does not support either -D (deterministic output) or response
+         # files.
+         command = "$ar -X64 {{arflags}} -r -c -s {{output}} {{inputs}}"
++      } else if (current_os == "mac") {
++        command = "\"$ar\" {{arflags}} -r -c -s {{output}} {{inputs}}"
+       } else {
+         rspfile = "{{output}}.rsp"
+         rspfile_content = "{{inputs}}"
+@@ -546,7 +548,7 @@
+
+       start_group_flag = ""
+       end_group_flag = ""
+-      if (current_os != "aix") {
++      if (current_os != "aix" && current_os != "mac") {
+         # the "--start-group .. --end-group" feature isn't available on the aix ld.
+         start_group_flag = "-Wl,--start-group"
+         end_group_flag = "-Wl,--end-group "
 --- a/wee8/src/wasm/c-api.cc
 +++ b/wee8/src/wasm/c-api.cc
 @@ -825,7 +825,7 @@ void global_set_f32(v8::Local<v8::Object> global, float val) {
@@ -12,7 +34,16 @@
  }
 
  // Tables
-@@ -1107,7 +1107,7 @@ class StoreImpl {
+@@ -985,7 +985,7 @@ auto seal(const typename implement<C>::type* x) -> const C* {
+   return reinterpret_cast<const C*>(x);
+ }
+
+-#ifdef DEBUG
++#if 0
+ template <class T>
+ void vec<T>::make_data() {}
+
+@@ -1107,13 +1107,12 @@ class StoreImpl {
    StoreImpl() {}
 
    ~StoreImpl() {
@@ -21,6 +52,28 @@
      reinterpret_cast<i::Isolate*>(isolate_)->heap()->PreciseCollectAllGarbage(
          i::Heap::kNoGCFlags, i::GarbageCollectionReason::kTesting,
          v8::kGCCallbackFlagForced);
+ #endif
+     context()->Exit();
+-    isolate_->Exit();
+     isolate_->Dispose();
+     delete create_params_.array_buffer_allocator;
+   }
+@@ -1163,7 +1162,6 @@ auto Store::make(Engine*) -> own<Store*> {
+   if (!isolate) return own<Store*>();
+
+   {
+-    v8::Isolate::Scope isolate_scope(isolate);
+     v8::HandleScope handle_scope(isolate);
+
+     // Create context.
+@@ -1246,7 +1244,6 @@ auto Store::make(Engine*) -> own<Store*> {
+     store->host_data_map_ = v8::Eternal<v8::Object>(isolate, map);
+   }
+
+-  store->isolate()->Enter();
+   store->context()->Enter();
+   isolate->SetData(0, store.get());
+
 --- a/wee8/third_party/wasm-api/wasm.hh
 +++ b/wee8/third_party/wasm-api/wasm.hh
 @@ -111,7 +111,7 @@ class vec {

bazel/repositories.bzl

@@ -120,14 +120,6 @@ def envoy_dependencies(skip_targets = []):
         actual = "@envoy//bazel:boringssl",
     )
 
-    # Binding to an alias pointing to a platform-specific version of wee8.
-    _wee8_linux()
-    _wee8_macos()
-    native.bind(
-        name = "wee8",
-        actual = "@envoy//bazel:wee8",
-    )
-
     # The long repo names (`com_github_fmtlib_fmt` instead of `fmtlib`) are
     # semi-standard in the Bazel community, intended to avoid both duplicate
     # dependencies and name conflicts.
@@ -158,6 +150,7 @@ def envoy_dependencies(skip_targets = []):
     _com_github_curl()
     _com_github_envoyproxy_sqlparser()
     _com_googlesource_quiche()
+    _com_googlesource_chromium_v8()
     _org_llvm_llvm()
     _com_github_wavm_wavm()
     _com_lightstep_tracer_cpp()
@@ -731,26 +724,18 @@ def _com_github_wavm_wavm():
         actual = "@envoy//bazel/foreign_cc:wavm",
     )
 
-def _wee8_linux():
-    location = REPOSITORY_LOCATIONS["wee8_linux"]
+def _com_googlesource_chromium_v8():
+    location = REPOSITORY_LOCATIONS["com_googlesource_chromium_v8"]
     genrule_repository(
-        name = "wee8_linux",
-        urls = location["urls"],
-        sha256 = location["sha256"],
+        name = "com_googlesource_chromium_v8",
         genrule_cmd_file = "@envoy//bazel/external:wee8.genrule_cmd",
         build_file = "@envoy//bazel/external:wee8.BUILD",
         patches = ["@envoy//bazel/external:wee8.patch"],
+        **location
     )
-
-def _wee8_macos():
-    location = REPOSITORY_LOCATIONS["wee8_macos"]
-    genrule_repository(
-        name = "wee8_macos",
-        urls = location["urls"],
-        sha256 = location["sha256"],
-        genrule_cmd_file = "@envoy//bazel/external:wee8.genrule_cmd",
-        build_file = "@envoy//bazel/external:wee8.BUILD",
-        patches = ["@envoy//bazel/external:wee8.patch"],
+    native.bind(
+        name = "wee8",
+        actual = "@com_googlesource_chromium_v8//:wee8",
     )
 
 def _foreign_cc_dependencies():

bazel/repository_locations.bzl

@@ -241,19 +241,11 @@ REPOSITORY_LOCATIONS = dict(
         strip_prefix = "WAVM-95dbf08c8695b8941e7020c557d8612f9d2af895",
         urls = ["https://github.com/WAVM/WAVM/archive/95dbf08c8695b8941e7020c557d8612f9d2af895.tar.gz"],
     ),
-    wee8_linux = dict(
+    com_googlesource_chromium_v8 = dict(
         # This archive was created using https://storage.googleapis.com/envoyproxy-wee8/wee8-archive.sh
-        # and contains complete checkout of v8 with all dependencies necessary to build wee8 on Linux-x86_64.
-        # TODO(PiotrSikora): switch to local compiler and provide single platform-agnostic archive.
-        sha256 = "1caebced30cb9d3531be4720b70c9132c988b362160f7721bc01caeb572c0eb7",
-        urls = ["https://storage.googleapis.com/envoyproxy-wee8/wee8-7.5.288.22-linux-x86_64.tar.gz"],
-    ),
-    wee8_macos = dict(
-        # This archive was created using https://storage.googleapis.com/envoyproxy-wee8/wee8-archive.sh
-        # and contains complete checkout of v8 with all dependencies necessary to build wee8 on macOS-x86_64.
-        # TODO(PiotrSikora): switch to local compiler and provide single platform-agnostic archive.
-        sha256 = "f84e423417db0b03b96e853b7d92f69be7d4936a33d1e8e05848fb146925ff68",
-        urls = ["https://storage.googleapis.com/envoyproxy-wee8/wee8-7.5.288.22-macos-x86_64.tar.gz"],
+        # and contains complete checkout of v8 with all dependencies necessary to build wee8.
+        sha256 = "d59c26ce5d7a2b23fb6251823df700cda0dc9a93086c932be5dfd9048a763d03",
+        urls = ["https://storage.googleapis.com/envoyproxy-wee8/wee8-7.5.288.22.tar.gz"],
     ),
     io_opencensus_cpp = dict(
         sha256 = "8d6016e47c2e19e7acbadb6f905b8c422748c64299d71101ac8f28151677e195",