Replace DumpBacktrace with Chromium's StackTrace implementation.

src/base/debug/stack_trace_android.cc

+// Copyright (c) 2012 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.
+
+// Slightly adapted for inclusion in V8.
+// Copyright 2016 the V8 project authors. All rights reserved.
+
+#include "src/base/debug/stack_trace.h"
+
+#include <signal.h>
+#include <stddef.h>
+#include <string.h>
+#include <unwind.h>
+
+#include <src/base/platform/platform.h>
+
+#include <iomanip>
+#include <ostream>
+
+namespace {
+
+struct StackCrawlState {
+  StackCrawlState(uintptr_t* frames, size_t max_depth)
+      : frames(frames),
+        frame_count(0),
+        max_depth(max_depth),
+        have_skipped_self(false) {}
+
+  uintptr_t* frames;
+  size_t frame_count;
+  size_t max_depth;
+  bool have_skipped_self;
+};
+
+_Unwind_Reason_Code TraceStackFrame(_Unwind_Context* context, void* arg) {
+  StackCrawlState* state = static_cast<StackCrawlState*>(arg);
+  uintptr_t ip = _Unwind_GetIP(context);
+
+  // The first stack frame is this function itself.  Skip it.
+  if (ip != 0 && !state->have_skipped_self) {
+    state->have_skipped_self = true;
+    return _URC_NO_REASON;
+  }
+
+  state->frames[state->frame_count++] = ip;
+  if (state->frame_count >= state->max_depth)
+    return _URC_END_OF_STACK;
+  return _URC_NO_REASON;
+}
+
+}  // namespace
+
+namespace v8 {
+namespace base {
+namespace debug {
+
+bool EnableInProcessStackDumping() {
+  // When running in an application, our code typically expects SIGPIPE
+  // to be ignored.  Therefore, when testing that same code, it should run
+  // with SIGPIPE ignored as well.
+  // TODO(phajdan.jr): De-duplicate this SIGPIPE code.
+  struct sigaction action;
+  memset(&action, 0, sizeof(action));
+  action.sa_handler = SIG_IGN;
+  sigemptyset(&action.sa_mask);
+  return (sigaction(SIGPIPE, &action, NULL) == 0);
+}
+
+void DisableSignalStackDump() {
+}
+
+StackTrace::StackTrace() {
+  StackCrawlState state(reinterpret_cast<uintptr_t*>(trace_), kMaxTraces);
+  _Unwind_Backtrace(&TraceStackFrame, &state);
+  count_ = state.frame_count;
+}
+
+void StackTrace::Print() const {
+  std::string backtrace = ToString();
+  OS::Print("%s\n", backtrace.c_str());
+}
+
+void StackTrace::OutputToStream(std::ostream* os) const {
+  for (size_t i = 0; i < count_; ++i) {
+    *os << "#" << std::setw(2) << i << trace_[i] << "\n";
+  }
+}
+
+}  // namespace debug
+}  // namespace base
+}  // namespace v8