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205afe6798
This corresponds with the branchpoint for the 3.6 release. A number of files not required for the FreeBSD build have been removed. Sponsored by: DARPA, AFRL
100 lines
3.5 KiB
C++
100 lines
3.5 KiB
C++
//===---------------------ProcessStructReader.h ------------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#ifndef utility_ProcessStructReader_h_
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#define utility_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/Core/ConstString.h"
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#include "lldb/Core/DataExtractor.h"
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#include "lldb/Core/Error.h"
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#include "lldb/Symbol/ClangASTType.h"
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#include "lldb/Target/Process.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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{
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protected:
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struct FieldImpl
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{
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ClangASTType type;
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size_t offset;
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size_t size;
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};
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std::map<ConstString, 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, ClangASTType struct_type)
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{
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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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{
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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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ClangASTType field_type = struct_type.GetFieldAtIndex(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();
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// no support for things larger than a uint64_t (yet)
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if (size > 8)
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return;
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ConstString const_name = ConstString(name.c_str());
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size_t byte_index = static_cast<size_t>(bit_offset / 8);
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m_fields[const_name] = FieldImpl{field_type, byte_index, static_cast<size_t>(size)};
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}
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size_t total_size = struct_type.GetByteSize();
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lldb::DataBufferSP buffer_sp(new DataBufferHeap(total_size,0));
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Error error;
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process->ReadMemoryFromInferior(base_addr,
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buffer_sp->GetBytes(),
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total_size,
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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
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GetField (ConstString name, RetType fail_value = RetType())
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{
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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 // utility_ProcessStructReader_h_
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