Add out-of-process memory logging stream parsing.

chrome/profiling/stack.cc

Index: chrome/profiling/stack.cc
diff --git a/chrome/profiling/stack.cc b/chrome/profiling/stack.cc
new file mode 100644
index 0000000000000000000000000000000000000000..5715177e1a1a60d0616b84b52f15c6d5bcd95bb2
--- /dev/null
+++ b/chrome/profiling/stack.cc
@@ -0,0 +1,46 @@
+// Copyright 2017 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.
+
+#include "chrome/profiling/stack.h"
+
+#include <algorithm>
+
+#include "base/hash.h"
+#include "chrome/profiling/profiling_globals.h"
+#include "chrome/profiling/stack_storage.h"
+
+namespace profiling {
+
+namespace {
+
+size_t ComputeHash(const std::vector<Address>& addrs) {
+  if (addrs.empty())
+    return 0;
+  // Assume Address is a POD containing only the address with no padding.
+  return base::Hash(reinterpret_cast<const char*>(&addrs[0]),
+                    addrs.size() * sizeof(Address));
+}
+
+}  // namespace
+
+Stack::Stack(std::vector<Address>&& a)
+    : addrs_(std::move(a)), hash_(ComputeHash(addrs_)) {}
+
+Stack::~Stack() {}
+
+bool Stack::operator==(const Stack& other) const {
+  if (addrs_.size() != other.addrs_.size())
+    return false;
+  for (size_t i = 0; i < addrs_.size(); i++) {
+    if (addrs_[i] != other.addrs_[i])
+      return false;
+  }
+  return true;
+}
+
+bool Stack::operator!=(const Stack& other) const {
+  return !operator==(other);
+}
+
+}  // namespace profiling