97 lines
3.2 KiB
C++
97 lines
3.2 KiB
C++
// Copyright 2018 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 "snapshot/memory_snapshot.h"
|
|
|
|
#include <algorithm>
|
|
|
|
#include "base/format_macros.h"
|
|
#include "base/logging.h"
|
|
#include "base/strings/stringprintf.h"
|
|
#include "util/numeric/checked_range.h"
|
|
|
|
namespace crashpad {
|
|
namespace {
|
|
|
|
bool DetermineMergedRangeImpl(bool log,
|
|
const MemorySnapshot* a,
|
|
const MemorySnapshot* b,
|
|
CheckedRange<uint64_t, size_t>* merged) {
|
|
if (a->Size() == 0) {
|
|
LOG_IF(ERROR, log) << base::StringPrintf(
|
|
"invalid empty range at 0x%" PRIx64, a->Address());
|
|
return false;
|
|
}
|
|
|
|
if (b->Size() == 0) {
|
|
LOG_IF(ERROR, log) << base::StringPrintf(
|
|
"invalid empty range at 0x%" PRIx64, b->Address());
|
|
return false;
|
|
}
|
|
|
|
CheckedRange<uint64_t, size_t> range_a(a->Address(), a->Size());
|
|
if (!range_a.IsValid()) {
|
|
LOG_IF(ERROR, log) << base::StringPrintf("invalid range at 0x%" PRIx64
|
|
", size %" PRIuS,
|
|
range_a.base(),
|
|
range_a.size());
|
|
return false;
|
|
}
|
|
|
|
CheckedRange<uint64_t, size_t> range_b(b->Address(), b->Size());
|
|
if (!range_b.IsValid()) {
|
|
LOG_IF(ERROR, log) << base::StringPrintf("invalid range at 0x%" PRIx64
|
|
", size %" PRIuS,
|
|
range_b.base(),
|
|
range_b.size());
|
|
return false;
|
|
}
|
|
|
|
if (!range_a.OverlapsRange(range_b) && range_a.end() != range_b.base() &&
|
|
range_b.end() != range_a.base()) {
|
|
LOG_IF(ERROR, log) << base::StringPrintf(
|
|
"ranges not overlapping or abutting: (0x%" PRIx64 ", size %" PRIuS
|
|
") and (0x%" PRIx64 ", size %" PRIuS ")",
|
|
range_a.base(),
|
|
range_a.size(),
|
|
range_b.base(),
|
|
range_b.size());
|
|
return false;
|
|
}
|
|
|
|
if (merged) {
|
|
uint64_t base = std::min(range_a.base(), range_b.base());
|
|
uint64_t end = std::max(range_a.end(), range_b.end());
|
|
size_t size = static_cast<size_t>(end - base);
|
|
merged->SetRange(base, size);
|
|
}
|
|
return true;
|
|
}
|
|
|
|
} // namespace
|
|
|
|
bool LoggingDetermineMergedRange(const MemorySnapshot* a,
|
|
const MemorySnapshot* b,
|
|
CheckedRange<uint64_t, size_t>* merged) {
|
|
return DetermineMergedRangeImpl(true, a, b, merged);
|
|
}
|
|
|
|
bool DetermineMergedRange(const MemorySnapshot* a,
|
|
const MemorySnapshot* b,
|
|
CheckedRange<uint64_t, size_t>* merged) {
|
|
return DetermineMergedRangeImpl(false, a, b, merged);
|
|
}
|
|
|
|
} // namespace crashpad
|