win: make CrashpadInfo retrievable

util/numeric/checked_address_range.cc

+// Copyright 2015 The Crashpad Authors. All rights reserved.
+//
+// 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.
+
+#include "util/numeric/checked_address_range.h"
+
+#if defined(OS_MACOSX)
+#include <mach/mach.h>
+#elif defined(OS_WIN)
+#include "util/win/address_types.h"
+#endif  // OS_MACOSX
+
+namespace crashpad {
+
+template <class ValueType, class SizeType>
+CheckedAddressRangeGeneric<ValueType, SizeType>::CheckedAddressRangeGeneric()
+    : range_32_(0, 0),
+#if defined(COMPILER_MSVC)
+      range_64_(0, 0),
+#endif  // COMPILER_MSVC
+      is_64_bit_(false),
+      range_ok_(true) {
+}
+
+template <class ValueType, class SizeType>
+CheckedAddressRangeGeneric<ValueType, SizeType>::CheckedAddressRangeGeneric(
+    bool is_64_bit,
+    ValueType base,
+    SizeType size)
+#if defined(COMPILER_MSVC)
+    : range_32_(0, 0),
+      range_64_(0, 0)
+#endif  // COMPILER_MSVC
+{
+  SetRange(is_64_bit, base, size);
+}
+
+template <class ValueType, class SizeType>
+ValueType CheckedAddressRangeGeneric<ValueType, SizeType>::Base() const {
+  return is_64_bit_ ? range_64_.base() : range_32_.base();
+}
+
+template <class ValueType, class SizeType>
+SizeType CheckedAddressRangeGeneric<ValueType, SizeType>::Size() const {
+  return is_64_bit_ ? range_64_.size() : range_32_.size();
+}
+
+template <class ValueType, class SizeType>
+ValueType CheckedAddressRangeGeneric<ValueType, SizeType>::End() const {
+  return is_64_bit_ ? range_64_.end() : range_32_.end();
+}
+
+template <class ValueType, class SizeType>
+bool CheckedAddressRangeGeneric<ValueType, SizeType>::IsValid() const {
+  return range_ok_ && (is_64_bit_ ? range_64_.IsValid() : range_32_.IsValid());
+}
+
+template <class ValueType, class SizeType>
+void CheckedAddressRangeGeneric<ValueType, SizeType>::SetRange(bool is_64_bit,
+                                                               ValueType base,
+                                                               SizeType size) {
+  is_64_bit_ = is_64_bit;
+  if (is_64_bit_) {
+    range_64_.SetRange(base, size);
+    range_ok_ = true;
+  } else {
+    range_32_.SetRange(static_cast<uint32_t>(base),
+                       static_cast<uint32_t>(size));
+    range_ok_ = base::IsValueInRangeForNumericType<uint32_t>(base) &&
+                base::IsValueInRangeForNumericType<uint32_t>(size);
+  }
+}
+
+template <class ValueType, class SizeType>
+bool CheckedAddressRangeGeneric<ValueType, SizeType>::ContainsValue(
+    ValueType value) const {
+  DCHECK(range_ok_);
+
+  if (is_64_bit_) {
+    return range_64_.ContainsValue(value);
+  }
+
+  if (!base::IsValueInRangeForNumericType<uint32_t>(value)) {
+    return false;
+  }
+
+  return range_32_.ContainsValue(static_cast<uint32_t>(value));
+}
+
+template <class ValueType, class SizeType>
+bool CheckedAddressRangeGeneric<ValueType, SizeType>::ContainsRange(
+    const CheckedAddressRangeGeneric& that) const {
+  DCHECK_EQ(is_64_bit_, that.is_64_bit_);
+  DCHECK(range_ok_);
+  DCHECK(that.range_ok_);
+
+  return is_64_bit_ ? range_64_.ContainsRange(that.range_64_)
+                    : range_32_.ContainsRange(that.range_32_);
+}
+
+// Explicit instantiations for the cases we use.
+#if defined(OS_MACOSX)
+template class CheckedAddressRangeGeneric<mach_vm_address_t, mach_vm_size_t>;
+#elif defined(OS_WIN)
+template class CheckedAddressRangeGeneric<win_vm_address_t, win_vm_size_t>;
+#endif  // OS_MACOSX
+
+template class CheckedAddressRangeGeneric<uintptr_t, size_t>;
+
+}  // namespace crashpad