Revert "Update libcxx and libcxxabi"

This reverts commit 3491f72.

Reason for revert: breaks tsan on linux. I did test locally before submitting, but without RBE.

Original change's description:
> Update libcxx and libcxxabi
>
> Add libc, required by libcxx.
>
> Based on flutter/flutter#165621.
>
> Change-Id: I5b929dc81b2572e3b919a8d20e031f98196375e6
> Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/416220
> Auto-Submit: Ivan Inozemtsev <[email protected]>
> Reviewed-by: Ryan Macnak <[email protected]>
> Commit-Queue: Ivan Inozemtsev <[email protected]>

No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Change-Id: Idcae5b01dbec26045ea7704d1575f73947d0682e
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/420560
Commit-Queue: Alexander Aprelev <[email protected]>
Bot-Commit: Rubber Stamper <[email protected]>
Auto-Submit: Ivan Inozemtsev <[email protected]>
Reviewed-by: Alexander Aprelev <[email protected]>

Author: iinozemtsev

DEPS

@@ -104,9 +104,8 @@ vars = {
   "devtools_rev": "f10e8df8c517fb0412b9a66c626581867c9c267d",
   "icu_rev": "43953f57b037778a1b8005564afabe214834f7bd",
   "jinja2_rev": "2222b31554f03e62600cd7e383376a7c187967a1",
-  "libcxx_rev": "bd557f6f764d1e40b62528a13b124ce740624f8f",
-  "libcxxabi_rev": "a4dda1589d37a7e4b4f7a81ebad01b1083f2e726",
-  "libc_rev": "5af39a19a1ad51ce93972cdab206dcd3ff9b6afa",
+  "libcxx_rev": "44079a4cc04cdeffb9cfe8067bfb3c276fb2bab0",
+  "libcxxabi_rev": "2ce528fb5e0f92e57c97ec3ff53b75359d33af12",
   "libprotobuf_rev": "24487dd1045c7f3d64a21f38a3f0c06cc4cf2edb",
   "markupsafe_rev": "8f45f5cfa0009d2a70589bcda0349b8cb2b72783",
   "perfetto_rev": "13ce0c9e13b0940d2476cd0cff2301708a9a2e2b",
@@ -274,9 +273,6 @@ deps = {
   Var("dart_root") + "/third_party/libcxxabi":
       Var("llvm_git") + "/llvm-project/libcxxabi" + "@" + Var("libcxxabi_rev"),
 
-  Var("dart_root") + "/third_party/libc":
-      Var("llvm_git") + "/llvm-project/libc" + "@" + Var("libc_rev"),
-
   Var("dart_root") + "/third_party/boringssl/src":
       "https://boringssl.googlesource.com/boringssl.git" +
       "@" + Var("boringssl_rev"),

build/secondary/third_party/libc/BUILD.gn

@@ -15,24 +15,17 @@ source_set("libcxx") {
   sources = [
     "src/algorithm.cpp",
     "src/any.cpp",
-    "src/atomic.cpp",
-    "src/barrier.cpp",
     "src/bind.cpp",
-    "src/call_once.cpp",
     "src/charconv.cpp",
     "src/chrono.cpp",
     "src/condition_variable.cpp",
     "src/condition_variable_destructor.cpp",
-    "src/error_category.cpp",
+    "src/debug.cpp",
     "src/exception.cpp",
-    "src/filesystem/directory_entry.cpp",
     "src/filesystem/directory_iterator.cpp",
-    "src/filesystem/filesystem_clock.cpp",
-    "src/filesystem/filesystem_error.cpp",
+    "src/filesystem/filesystem_common.h",
     "src/filesystem/int128_builtins.cpp",
     "src/filesystem/operations.cpp",
-    "src/filesystem/path.cpp",
-    "src/fstream.cpp",
     "src/functional.cpp",
     "src/future.cpp",
     "src/hash.cpp",
@@ -41,17 +34,11 @@ source_set("libcxx") {
     "src/iostream.cpp",
     "src/locale.cpp",
     "src/memory.cpp",
-    "src/memory_resource.cpp",
     "src/mutex.cpp",
     "src/mutex_destructor.cpp",
     "src/new.cpp",
-    "src/new_handler.cpp",
-    "src/new_helpers.cpp",
     "src/optional.cpp",
-    "src/ostream.cpp",
-    "src/print.cpp",
     "src/random.cpp",
-    "src/random_shuffle.cpp",
     "src/regex.cpp",
     "src/ryu/d2fixed.cpp",
     "src/ryu/d2s.cpp",
@@ -63,16 +50,13 @@ source_set("libcxx") {
     "src/system_error.cpp",
     "src/thread.cpp",
     "src/typeinfo.cpp",
+    "src/utility.cpp",
     "src/valarray.cpp",
     "src/variant.cpp",
     "src/vector.cpp",
-    "src/verbose_abort.cpp",
   ]
 
-  deps = [
-    "//third_party/libc",
-    "//third_party/libcxxabi",
-  ]
+  deps = [ "//third_party/libcxxabi" ]
 
   # TODO(goderbauer): remove when all sources build with LTO for android_arm64 and android_x64.
   if (is_android && (current_cpu == "arm64" || current_cpu == "x64")) {

build/secondary/third_party/libcxx/BUILD.gn

@@ -1,7 +1,31 @@
 #ifndef _LIBCPP_CONFIG_SITE
 #define _LIBCPP_CONFIG_SITE
-#define _LIBCPP_ABI_VERSION 1
-#define _LIBCPP_ABI_NAMESPACE _d
+
+/* #undef _LIBCPP_ABI_VERSION */
+/* #undef _LIBCPP_ABI_UNSTABLE */
+/* #undef _LIBCPP_ABI_FORCE_ITANIUM */
+/* #undef _LIBCPP_ABI_FORCE_MICROSOFT */
+/* #undef _LIBCPP_HIDE_FROM_ABI_PER_TU_BY_DEFAULT */
+/* #undef _LIBCPP_HAS_NO_GLOBAL_FILESYSTEM_NAMESPACE */
+/* #undef _LIBCPP_HAS_NO_STDIN */
+/* #undef _LIBCPP_HAS_NO_STDOUT */
+/* #undef _LIBCPP_HAS_NO_THREADS */
+/* #undef _LIBCPP_HAS_NO_MONOTONIC_CLOCK */
+/* #undef _LIBCPP_HAS_NO_THREAD_UNSAFE_C_FUNCTIONS */
+/* #undef _LIBCPP_HAS_MUSL_LIBC */
+/* #undef _LIBCPP_HAS_THREAD_API_PTHREAD */
+/* #undef _LIBCPP_HAS_THREAD_API_EXTERNAL */
+/* #undef _LIBCPP_HAS_THREAD_API_WIN32 */
+/* #undef _LIBCPP_HAS_THREAD_LIBRARY_EXTERNAL */
+/* #undef _LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS */
+#define _LIBCPP_HAS_NO_VENDOR_AVAILABILITY_ANNOTATIONS
+/* #undef _LIBCPP_NO_VCRUNTIME */
+/* #undef _LIBCPP_TYPEINFO_COMPARISON_IMPLEMENTATION */
+/* #undef _LIBCPP_ABI_NAMESPACE */
+/* #undef _LIBCPP_HAS_NO_FILESYSTEM_LIBRARY */
+/* #undef _LIBCPP_HAS_PARALLEL_ALGORITHMS */
+/* #undef _LIBCPP_HAS_NO_RANDOM_DEVICE */
+/* #undef _LIBCPP_HAS_NO_LOCALIZATION */
 
 #define _LIBCPP_REMOVE_TRANSITIVE_INCLUDES
 
@@ -12,31 +36,4 @@
 #define _LIBCPP_COMPILER_CLANG_BASED
 #endif
 
-#if defined(__APPLE__)
-#define _LIBCPP_PSTL_BACKEND_LIBDISPATCH 1
-#else
-#define _LIBCPP_PSTL_BACKEND_STD_THREAD 1
-#endif
-
-#define _LIBCPP_HARDENING_MODE_DEFAULT _LIBCPP_HARDENING_MODE_NONE
-
-#define _LIBCPP_HAS_FILESYSTEM 1
-#define _LIBCPP_HAS_LOCALIZATION 1
-#define _LIBCPP_HAS_MONOTONIC_CLOCK 1
-#define _LIBCPP_HAS_RANDOM_DEVICE 1
-#define _LIBCPP_HAS_THREADS 1
-#define _LIBCPP_HAS_VENDOR_AVAILABILITY_ANNOTATIONS 0
-#define _LIBCPP_HAS_UNICODE 1
-#define _LIBCPP_HAS_WIDE_CHARACTERS 1
-
-#ifdef _WIN32
-#define _LIBCPP_HAS_THREAD_API_PTHREAD 0
-#define _LIBCPP_HAS_THREAD_API_EXTERNAL 0
-#define _LIBCPP_HAS_THREAD_API_WIN32 1
-#else
-#define _LIBCPP_HAS_THREAD_API_PTHREAD 1
-#define _LIBCPP_HAS_THREAD_API_EXTERNAL 0
-#define _LIBCPP_HAS_THREAD_API_WIN32 0
-#endif
-
 #endif // _LIBCPP_CONFIG_SITE