6024e5c395
clang 20.0.0 (based on r547379) from build 12806354. Bug: http://b/379133546 Test: N/A Change-Id: I2eb8938af55d809de674be63cb30cf27e801862b Upstream-Commit: ad834e67b1105d15ef907f6255d4c96e8e733f57
99 lines
3.1 KiB
C++
99 lines
3.1 KiB
C++
//===---------------------ProcessStructReader.h ------------------*- 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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#ifndef LLDB_TARGET_PROCESSSTRUCTREADER_H
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#define LLDB_TARGET_PROCESSSTRUCTREADER_H
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#include "lldb/lldb-defines.h"
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#include "lldb/lldb-types.h"
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#include "lldb/Symbol/CompilerType.h"
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#include "lldb/Target/Process.h"
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#include "lldb/Utility/DataBufferHeap.h"
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#include "lldb/Utility/DataExtractor.h"
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#include "lldb/Utility/Status.h"
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#include "llvm/ADT/StringMap.h"
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#include <initializer_list>
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#include <map>
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#include <string>
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namespace lldb_private {
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class ProcessStructReader {
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protected:
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struct FieldImpl {
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CompilerType type;
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size_t offset;
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size_t size;
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};
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llvm::StringMap<FieldImpl> m_fields;
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DataExtractor m_data;
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lldb::ByteOrder m_byte_order;
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size_t m_addr_byte_size;
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public:
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ProcessStructReader(Process *process, lldb::addr_t base_addr,
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CompilerType struct_type)
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: m_byte_order(lldb::eByteOrderInvalid), m_addr_byte_size(0) {
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if (!process)
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return;
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if (base_addr == 0 || base_addr == LLDB_INVALID_ADDRESS)
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return;
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m_byte_order = process->GetByteOrder();
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m_addr_byte_size = process->GetAddressByteSize();
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for (size_t idx = 0; idx < struct_type.GetNumFields(); idx++) {
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std::string name;
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uint64_t bit_offset;
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uint32_t bitfield_bit_size;
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bool is_bitfield;
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CompilerType field_type = struct_type.GetFieldAtIndex(
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idx, name, &bit_offset, &bitfield_bit_size, &is_bitfield);
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// no support for bitfields in here (yet)
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if (is_bitfield)
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return;
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auto size = field_type.GetByteSize(nullptr);
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// no support for things larger than a uint64_t (yet)
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if (!size || *size > 8)
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return;
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size_t byte_index = static_cast<size_t>(bit_offset / 8);
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m_fields.insert({name, FieldImpl{field_type, byte_index,
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static_cast<size_t>(*size)}});
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}
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auto total_size = struct_type.GetByteSize(nullptr);
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if (!total_size)
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return;
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lldb::WritableDataBufferSP buffer_sp(new DataBufferHeap(*total_size, 0));
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Status error;
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process->ReadMemoryFromInferior(base_addr, buffer_sp->GetBytes(),
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*total_size, error);
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if (error.Fail())
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return;
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m_data = DataExtractor(buffer_sp, m_byte_order, m_addr_byte_size);
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}
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template <typename RetType>
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RetType GetField(llvm::StringRef name, RetType fail_value = RetType()) {
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auto iter = m_fields.find(name), end = m_fields.end();
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if (iter == end)
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return fail_value;
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auto size = iter->second.size;
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if (sizeof(RetType) < size)
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return fail_value;
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lldb::offset_t offset = iter->second.offset;
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if (offset + size > m_data.GetByteSize())
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return fail_value;
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return (RetType)(m_data.GetMaxU64(&offset, size));
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}
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};
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}
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#endif // LLDB_TARGET_PROCESSSTRUCTREADER_H
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