189 lines
7.4 KiB
C++
189 lines
7.4 KiB
C++
// Copyright (c) 2010 Google Inc. All Rights Reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following disclaimer
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// in the documentation and/or other materials provided with the
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// distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived from
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// this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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// This file contains the definitions for a DWARF2/3 information
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// collector that uses the DWARF2/3 reader interface to build a mapping
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// of addresses to files, lines, and functions.
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#ifndef COMMON_DWARF_FUNCTIONINFO_H__
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#define COMMON_DWARF_FUNCTIONINFO_H__
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#include <map>
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#include <string>
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#include <utility>
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#include <vector>
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#include "common/dwarf/dwarf2reader.h"
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namespace dwarf2reader {
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struct FunctionInfo {
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// Name of the function
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string name;
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// Mangled name of the function
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string mangled_name;
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// File containing this function
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string file;
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// Line number for start of function.
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uint32 line;
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// Beginning address for this function
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uint64 lowpc;
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// End address for this function.
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uint64 highpc;
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};
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struct SourceFileInfo {
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// Name of the source file name
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string name;
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// Low address of source file name
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uint64 lowpc;
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};
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typedef map<uint64, FunctionInfo*> FunctionMap;
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typedef map<uint64, pair<string, uint32> > LineMap;
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// This class is a basic line info handler that fills in the dirs,
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// file, and linemap passed into it with the data produced from the
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// LineInfoHandler.
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class CULineInfoHandler: public LineInfoHandler {
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public:
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//
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CULineInfoHandler(vector<SourceFileInfo>* files,
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vector<string>* dirs,
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LineMap* linemap);
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virtual ~CULineInfoHandler() { }
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// Called when we define a directory. We just place NAME into dirs_
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// at position DIR_NUM.
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virtual void DefineDir(const string& name, uint32 dir_num);
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// Called when we define a filename. We just place
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// concat(dirs_[DIR_NUM], NAME) into files_ at position FILE_NUM.
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virtual void DefineFile(const string& name, int32 file_num,
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uint32 dir_num, uint64 mod_time, uint64 length);
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// Called when the line info reader has a new line, address pair
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// ready for us. ADDRESS is the address of the code, LENGTH is the
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// length of its machine code in bytes, FILE_NUM is the file number
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// containing the code, LINE_NUM is the line number in that file for
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// the code, and COLUMN_NUM is the column number the code starts at,
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// if we know it (0 otherwise).
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virtual void AddLine(uint64 address, uint64 length,
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uint32 file_num, uint32 line_num, uint32 column_num);
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private:
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LineMap* linemap_;
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vector<SourceFileInfo>* files_;
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vector<string>* dirs_;
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};
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class CUFunctionInfoHandler: public Dwarf2Handler {
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public:
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CUFunctionInfoHandler(vector<SourceFileInfo>* files,
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vector<string>* dirs,
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LineMap* linemap,
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FunctionMap* offset_to_funcinfo,
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FunctionMap* address_to_funcinfo,
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CULineInfoHandler* linehandler,
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const SectionMap& sections,
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ByteReader* reader)
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: files_(files), dirs_(dirs), linemap_(linemap),
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offset_to_funcinfo_(offset_to_funcinfo),
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address_to_funcinfo_(address_to_funcinfo),
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linehandler_(linehandler), sections_(sections),
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reader_(reader), current_function_info_(NULL) { }
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virtual ~CUFunctionInfoHandler() { }
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// Start to process a compilation unit at OFFSET from the beginning of the
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// .debug_info section. We want to see all compilation units, so we
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// always return true.
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virtual bool StartCompilationUnit(uint64 offset, uint8 address_size,
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uint8 offset_size, uint64 cu_length,
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uint8 dwarf_version);
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// Start to process a DIE at OFFSET from the beginning of the
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// .debug_info section. We only care about function related DIE's.
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virtual bool StartDIE(uint64 offset, enum DwarfTag tag,
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const AttributeList& attrs);
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// Called when we have an attribute with unsigned data to give to
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// our handler. The attribute is for the DIE at OFFSET from the
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// beginning of the .debug_info section, has a name of ATTR, a form of
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// FORM, and the actual data of the attribute is in DATA.
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virtual void ProcessAttributeUnsigned(uint64 offset,
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enum DwarfAttribute attr,
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enum DwarfForm form,
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uint64 data);
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// Called when we have an attribute with a DIE reference to give to
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// our handler. The attribute is for the DIE at OFFSET from the
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// beginning of the .debug_info section, has a name of ATTR, a form of
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// FORM, and the offset of the referenced DIE from the start of the
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// .debug_info section is in DATA.
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virtual void ProcessAttributeReference(uint64 offset,
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enum DwarfAttribute attr,
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enum DwarfForm form,
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uint64 data);
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// Called when we have an attribute with string data to give to
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// our handler. The attribute is for the DIE at OFFSET from the
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// beginning of the .debug_info section, has a name of ATTR, a form of
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// FORM, and the actual data of the attribute is in DATA.
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virtual void ProcessAttributeString(uint64 offset,
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enum DwarfAttribute attr,
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enum DwarfForm form,
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const string& data);
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// Called when finished processing the DIE at OFFSET.
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// Because DWARF2/3 specifies a tree of DIEs, you may get starts
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// before ends of the previous DIE, as we process children before
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// ending the parent.
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virtual void EndDIE(uint64 offset);
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private:
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vector<SourceFileInfo>* files_;
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vector<string>* dirs_;
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LineMap* linemap_;
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FunctionMap* offset_to_funcinfo_;
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FunctionMap* address_to_funcinfo_;
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CULineInfoHandler* linehandler_;
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const SectionMap& sections_;
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ByteReader* reader_;
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FunctionInfo* current_function_info_;
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uint64 current_compilation_unit_offset_;
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};
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} // namespace dwarf2reader
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#endif // COMMON_DWARF_FUNCTIONINFO_H__
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