chore(3p/abseil_cpp): unvendor abseil_cpp r/3786

we weren't actually using these sources anymore, okay?

Change-Id: If701571d9716de308d3512e1eb22c35db0877a66
Reviewed-on: https://cl.tvl.fyi/c/depot/+/5248
Tested-by: BuildkiteCI
Reviewed-by: grfn <grfn@gws.fyi>
Autosubmit: tazjin <tazjin@tvl.su>

1 files changed, 0 insertions, 93 deletions

diff --git a/third_party/abseil_cpp/absl/debugging/internal/stacktrace_win32-inl.inc b/third_party/abseil_cpp/absl/debugging/internal/stacktrace_win32-inl.inc
deleted file mode 100644
index 1c666c8b561f..000000000000
--- a/third_party/abseil_cpp/absl/debugging/internal/stacktrace_win32-inl.inc
+++ /dev/null
@@ -1,93 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-// Produces a stack trace for Windows.  Normally, one could use
-// stacktrace_x86-inl.h or stacktrace_x86_64-inl.h -- and indeed, that
-// should work for binaries compiled using MSVC in "debug" mode.
-// However, in "release" mode, Windows uses frame-pointer
-// optimization, which makes getting a stack trace very difficult.
-//
-// There are several approaches one can take.  One is to use Windows
-// intrinsics like StackWalk64.  These can work, but have restrictions
-// on how successful they can be.  Another attempt is to write a
-// version of stacktrace_x86-inl.h that has heuristic support for
-// dealing with FPO, similar to what WinDbg does (see
-// http://www.nynaeve.net/?p=97).  There are (non-working) examples of
-// these approaches, complete with TODOs, in stacktrace_win32-inl.h#1
-//
-// The solution we've ended up doing is to call the undocumented
-// windows function RtlCaptureStackBackTrace, which probably doesn't
-// work with FPO but at least is fast, and doesn't require a symbol
-// server.
-//
-// This code is inspired by a patch from David Vitek:
-//   https://code.google.com/p/google-perftools/issues/detail?id=83
-
-#ifndef ABSL_DEBUGGING_INTERNAL_STACKTRACE_WIN32_INL_H_
-#define ABSL_DEBUGGING_INTERNAL_STACKTRACE_WIN32_INL_H_
-
-#include <windows.h>    // for GetProcAddress and GetModuleHandle
-#include <cassert>
-
-typedef USHORT NTAPI RtlCaptureStackBackTrace_Function(
-    IN ULONG frames_to_skip,
-    IN ULONG frames_to_capture,
-    OUT PVOID *backtrace,
-    OUT PULONG backtrace_hash);
-
-// It is not possible to load RtlCaptureStackBackTrace at static init time in
-// UWP. CaptureStackBackTrace is the public version of RtlCaptureStackBackTrace
-#if WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_APP) && \
-    !WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
-static RtlCaptureStackBackTrace_Function* const RtlCaptureStackBackTrace_fn =
-    &::CaptureStackBackTrace;
-#else
-// Load the function we need at static init time, where we don't have
-// to worry about someone else holding the loader's lock.
-static RtlCaptureStackBackTrace_Function* const RtlCaptureStackBackTrace_fn =
-    (RtlCaptureStackBackTrace_Function*)GetProcAddress(
-        GetModuleHandleA("ntdll.dll"), "RtlCaptureStackBackTrace");
-#endif  // WINAPI_PARTITION_APP && !WINAPI_PARTITION_DESKTOP
-
-template <bool IS_STACK_FRAMES, bool IS_WITH_CONTEXT>
-static int UnwindImpl(void** result, int* sizes, int max_depth, int skip_count,
-                      const void*, int* min_dropped_frames) {
-  int n = 0;
-  if (!RtlCaptureStackBackTrace_fn) {
-    // can't find a stacktrace with no function to call
-  } else {
-    n = (int)RtlCaptureStackBackTrace_fn(skip_count + 2, max_depth, result, 0);
-  }
-  if (IS_STACK_FRAMES) {
-    // No implementation for finding out the stack frame sizes yet.
-    memset(sizes, 0, sizeof(*sizes) * n);
-  }
-  if (min_dropped_frames != nullptr) {
-    // Not implemented.
-    *min_dropped_frames = 0;
-  }
-  return n;
-}
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace debugging_internal {
-bool StackTraceWorksForTest() {
-  return false;
-}
-}  // namespace debugging_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_DEBUGGING_INTERNAL_STACKTRACE_WIN32_INL_H_