Add gn Blink GC plugin options

build/config/sanitizers/BUILD.gn

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import("//build/config/chrome_build.gni")
 import("//build/config/chromecast_build.gni")
+import("//build/config/clang/clang.gni")
 import("//build/config/sanitizers/sanitizers.gni")
 import("//build/toolchain/toolchain.gni")
 
 # Contains the dependencies needed for sanitizers to link into executables and
 # shared_libraries. Unconditionally depend upon this target as it is empty if
 # |is_asan|, |is_lsan|, |is_tsan|, |is_msan| and |use_custom_libcxx| are false.
 group("deps") {
   public_deps = [
     ":deps_no_options",
   ]
@@ skipping 26 matching lines @@
     deps = []
 
     data = [
       "//tools/valgrind/asan/",
     ]
     if (is_win) {
       exe = ".exe"
     } else {
       exe = ""
     }
-    data += [ "//third_party//llvm-build/Release+Asserts/bin/llvm-symbolizer${exe}" ]
+    data += [ "$clang_base_path/bin/llvm-symbolizer${exe}" ]

[Nico, 2016/06/22 20:01:56]

not sure about the changes in this file -- these don't exist in normal local
builds but are put there by the clang packaging script. But let's go with this
for now.

     if (is_linux) {
       # llvm-symbolizer needs this.
-      data += [ "//third_party/llvm-build/Release+Asserts/lib/libstdc++.so.6" ]
+      data += [ "$clang_base_path/lib/libstdc++.so.6" ]
     }
 
     if (use_prebuilt_instrumented_libraries) {
       deps += [ "//third_party/instrumented_libraries:deps" ]
     }
     if (use_custom_libcxx) {
       public_deps = [
         "//buildtools/third_party/libc++:libcxx_proxy",
       ]
       data += [ "$root_out_dir/libc++.so" ]
     }
     if (is_mac) {
       data_deps = [
         ":copy_asan_runtime",
       ]
     }
   }
 }
 
 if (is_mac && using_sanitizer) {
   copy("copy_asan_runtime") {
     sources = [
-      "//third_party/llvm-build/Release+Asserts/lib/clang/$clang_version/lib/darwin/libclang_rt.asan_osx_dynamic.dylib",
+      "$clang_base_path/lib/clang/$clang_version/lib/darwin/libclang_rt.asan_osx_dynamic.dylib",
     ]
     outputs = [
       "$root_out_dir/{{source_file_part}}",
     ]
   }
 }
 
 config("sanitizer_options_link_helper") {
   if (is_mac) {
     ldflags = [ "-Wl,-U,_sanitizer_options_link_helper" ]
@@ skipping 342 matching lines @@
 # This allows to selectively disable ubsan_vptr, when needed. In particular,
 # if some third_party code is required to be compiled without rtti, which
 # is a requirement for ubsan_vptr.
 config("default_sanitizer_flags_but_ubsan_vptr") {
   configs = all_sanitizer_configs - [ ":ubsan_vptr_flags" ]
 }
 
 config("default_sanitizer_flags_but_coverage") {
   configs = all_sanitizer_configs - [ ":coverage_flags" ]
 }