d4d4e77918
Reapplies #106293, testing identified issue in the merging code. I used this opportunity to strip CoreFileMemoryRanges to it's own file and then add unit tests on it's behavior.
50 lines
1.9 KiB
C++
50 lines
1.9 KiB
C++
//===-- CoreFileMemoryRanges.cpp --------------------------------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "lldb/Target/CoreFileMemoryRanges.h"
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using namespace lldb;
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using namespace lldb_private;
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Status CoreFileMemoryRanges::FinalizeCoreFileSaveRanges() {
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Status error;
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std::vector<size_t> indexes_to_remove;
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this->Sort();
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for (size_t i = this->GetSize() - 1; i > 0; i--) {
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auto region = this->GetMutableEntryAtIndex(i);
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auto next_region = this->GetMutableEntryAtIndex(i - 1);
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if (next_region->GetRangeEnd() >= region->GetRangeBase() &&
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region->GetRangeBase() <= next_region->GetRangeEnd() &&
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region->data.lldb_permissions == next_region->data.lldb_permissions) {
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const addr_t base =
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std::min(region->GetRangeBase(), next_region->GetRangeBase());
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const addr_t byte_size =
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std::max(region->GetRangeEnd(), next_region->GetRangeEnd()) - base;
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next_region->SetRangeBase(base);
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next_region->SetByteSize(byte_size);
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// Because this is a range data vector, the entry has a base as well
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// as the data contained in the entry. So we have to update both.
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// And llvm::AddressRange isn't mutable so we have to create a new one.
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llvm::AddressRange range(base, base + byte_size);
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const CoreFileMemoryRange core_range = {
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range, next_region->data.lldb_permissions};
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next_region->data = core_range;
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if (!this->Erase(i, i + 1)) {
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error = Status::FromErrorString(
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"Core file memory ranges mutated outside of "
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"CalculateCoreFileSaveRanges");
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return error;
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}
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}
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}
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return error;
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}
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