1 files changed, 0 insertions, 128 deletions
diff --git a/absl/debugging/internal/stacktrace_libunwind-inl.inc b/absl/debugging/internal/stacktrace_libunwind-inl.inc
deleted file mode 100644
index e9c2d26a5fe4..000000000000
--- a/absl/debugging/internal/stacktrace_libunwind-inl.inc
+++ /dev/null
@@ -1,128 +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
-//
-//      http://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.
-
-#ifndef ABSL_DEBUGGING_INTERNAL_STACKTRACE_LIBUNWIND_INL_H_
-#define ABSL_DEBUGGING_INTERNAL_STACKTRACE_LIBUNWIND_INL_H_
-
-// We only need local unwinder.
-#define UNW_LOCAL_ONLY
-
-extern "C" {
-#include "third_party/libunwind/include/libunwind.h"
-}
-#include "absl/debugging/stacktrace.h"
-
-#include "absl/base/dynamic_annotations.h"
-#include "absl/base/internal/raw_logging.h"
-
-// Sometimes, we can try to get a stack trace from within a stack
-// trace, because we don't block signals inside libunwind (which would be too
-// expensive: the two extra system calls per stack trace do matter here).
-// That can cause a self-deadlock (as in http://b/5722312).
-// Protect against such reentrant call by failing to get a stack trace.
-//
-// We use __thread here because the code here is extremely low level -- it is
-// called while collecting stack traces from within malloc and mmap, and thus
-// can not call anything which might call malloc or mmap itself.
-// In particular, using PerThread or STATIC_THREAD_LOCAL_POD
-// here will cause infinite recursion for at least dbg/piii builds with
-// crosstool-v12.
-static __thread int recursive;
-
-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) {
-  if (recursive) {
-    return 0;
-  }
-  ++recursive;
-
-  int n = 0;
-  if (IS_STACK_FRAMES) {
-    void *ip;
-    unw_cursor_t cursor;
-    unw_context_t uc;
-    unw_word_t sp = 0, next_sp = 0;
-
-    unw_getcontext(&uc);
-    ABSL_RAW_CHECK(unw_init_local(&cursor, &uc) >= 0, "unw_init_local failed");
-    skip_count++;         // Do not include current frame
-
-    while (skip_count--) {
-      if (unw_step(&cursor) <= 0) {
-        goto out;
-      }
-      if (unw_get_reg(&cursor, UNW_REG_SP, &next_sp)) {
-        goto out;
-      }
-    }
-
-    while (n < max_depth) {
-      if (unw_get_reg(&cursor, UNW_REG_IP, (unw_word_t *) &ip) < 0) {
-        break;
-      }
-      sizes[n] = 0;
-      result[n++] = ip;
-      if (unw_step(&cursor) <= 0) {
-        break;
-      }
-      sp = next_sp;
-      if (unw_get_reg(&cursor, UNW_REG_SP, &next_sp) , 0) {
-        break;
-      }
-      sizes[n - 1] = next_sp - sp;
-    }
-    if (min_dropped_frames != nullptr) {
-      // Implementation detail: we clamp the max of frames we are willing to
-      // count, so as not to spend too much time in the loop below.
-      const int kMaxUnwind = 200;
-      int j = 0;
-      for (; j < kMaxUnwind; j++) {
-        if (unw_step(&cursor) < 0) {
-          break;
-        }
-      }
-      *min_dropped_frames = j;
-    }
-  } else {
-    skip_count++;  // Do not include current frame.
-    void **result_all = reinterpret_cast<void**>(
-        alloca(sizeof(void*) * (max_depth + skip_count)));
-    int rc = unw_backtrace(result_all, max_depth + skip_count);
-
-    if (rc > 0) {
-      // Tell MSan that result_all has been initialized. b/34965936.
-      ANNOTATE_MEMORY_IS_INITIALIZED(result_all, rc * sizeof(void*));
-    }
-
-    if (rc > skip_count) {
-      memcpy(result, &result_all[skip_count],
-             sizeof(void*) * (rc - skip_count));
-      n = rc - skip_count;
-    } else {
-      n = 0;
-    }
-
-    if (min_dropped_frames != nullptr) {
-      // Not implemented.
-      *min_dropped_frames = 0;
-    }
-  }
-
- out:
-  --recursive;
-  return n;
-}
-
-#endif  // ABSL_DEBUGGING_INTERNAL_STACKTRACE_LIBUNWIND_INL_H_