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https://github.com/chromium/crashpad.git
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dbfcb5d032
Add a user-configurable cap on the amount of memory that is gathered by dereferencing thread stacks. (SyzyAsan stores a tremendously large number of pointers on the stack, so the dumps were ending up in the ~25M range.) Also reduce the range around pointers somewhat. Change-Id: I6bce57d86bd2f6a796e1580c530909e089ec00ed Reviewed-on: https://chromium-review.googlesource.com/338463 Reviewed-by: Mark Mentovai <mark@chromium.org>
73 lines
2.5 KiB
C++
73 lines
2.5 KiB
C++
// Copyright 2016 The Crashpad Authors. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include "snapshot/win/capture_memory_delegate_win.h"
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#include "base/numerics/safe_conversions.h"
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#include "snapshot/win/memory_snapshot_win.h"
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namespace crashpad {
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namespace internal {
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CaptureMemoryDelegateWin::CaptureMemoryDelegateWin(
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ProcessReaderWin* process_reader,
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const ProcessReaderWin::Thread& thread,
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PointerVector<MemorySnapshotWin>* snapshots,
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uint32_t* budget_remaining)
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: stack_(thread.stack_region_address, thread.stack_region_size),
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process_reader_(process_reader),
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snapshots_(snapshots),
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budget_remaining_(budget_remaining) {}
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bool CaptureMemoryDelegateWin::Is64Bit() const {
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return process_reader_->Is64Bit();
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}
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bool CaptureMemoryDelegateWin::ReadMemory(uint64_t at,
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uint64_t num_bytes,
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void* into) const {
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return process_reader_->ReadMemory(at, num_bytes, into);
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}
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std::vector<CheckedRange<uint64_t>> CaptureMemoryDelegateWin::GetReadableRanges(
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const CheckedRange<uint64_t, uint64_t>& range) const {
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return process_reader_->GetProcessInfo().GetReadableRanges(range);
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}
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void CaptureMemoryDelegateWin::AddNewMemorySnapshot(
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const CheckedRange<uint64_t, uint64_t>& range) {
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// Don't bother storing this memory if it points back into the stack.
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if (stack_.ContainsRange(range))
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return;
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if (range.size() == 0)
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return;
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if (budget_remaining_ && *budget_remaining_ == 0)
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return;
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internal::MemorySnapshotWin* snapshot = new internal::MemorySnapshotWin();
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snapshot->Initialize(process_reader_, range.base(), range.size());
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snapshots_->push_back(snapshot);
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if (budget_remaining_) {
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if (!base::IsValueInRangeForNumericType<int64_t>(range.size())) {
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*budget_remaining_ = 0;
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} else {
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int64_t temp = *budget_remaining_;
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temp -= range.size();
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*budget_remaining_ = base::saturated_cast<uint32_t>(temp);
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}
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}
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}
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} // namespace internal
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} // namespace crashpad
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