File indexing completed on 2024-04-14 15:32:43

 /******************************************************************
  *
  * kdbgwin - Helper application for DrKonqi
  *
  * This file is part of the KDE project
  *
  * SPDX-FileCopyrightText: 2010 Ilie Halip <lupuroshu@gmail.com>
  *
  * SPDX-License-Identifier: LGPL-2.1-only OR LGPL-3.0-only OR LicenseRef-KDE-Accepted-LGPL
  *****************************************************************/
 
 #include "mingw_generator.h"
 #include <bfd.h>
 #include <cxxabi.h>
 
 MingwGenerator::MingwGenerator(const Process &process)
     : AbstractBTGenerator(process)
     , file(NULL)
     , func(NULL)
     , line(0)
 {
 }
 
 struct MyBFD {
     QString module;
     bfd *abfd;
     asymbol **syms;
     MyBFD()
         : abfd(0)
         , syms(0)
     {
     }
     MyBFD(const QString &module, bfd *abfd, asymbol **syms)
     {
         this->module = module;
         this->abfd = abfd;
         this->syms = syms;
     }
     bool operator==(const MyBFD &other)
     {
         return module == other.module;
     }
 };
 
 typedef QList<MyBFD> TBFDList;
 TBFDList bfds;
 
 asection *text = NULL;
 
 bool MingwGenerator::Init()
 {
     bfd_init();
     return true;
 }
 
 void MingwGenerator::UnInit()
 {
 }
 
 void MingwGenerator::FrameChanged()
 {
     QString modPath = GetModulePath();
     bool existsSymbol = false;
     TSymbolsMap::const_iterator i = m_symbolsMap.constFind(modPath);
     if (i == m_symbolsMap.cend()) {
         return;
     }
     MyBFD dummy(modPath, NULL, NULL);
     int pos = bfds.indexOf(dummy);
     if (pos == -1) {
         return;
     }
     MyBFD bfd = bfds[pos];
     text = bfd_get_section_by_name(bfd.abfd, ".text");
     long offset = m_currentFrame.AddrPC.Offset - text->vma;
     file = DEFAULT_FILE;
     func = DEFAULT_FUNC;
     line = DEFAULT_LINE;
     if (offset > 0) {
         bfd_find_nearest_line(bfd.abfd, text, bfd.syms, offset, &file, &func, (unsigned int *)&line);
     }
 }
 
 QString MingwGenerator::GetFunctionName()
 {
     if (func != NULL) {
         char *realname = abi::__cxa_demangle(func, NULL, NULL, NULL);
         if (realname != NULL) {
             QString strReturn = QString::fromLatin1(realname);
             free(realname);
             return strReturn;
         } else {
             return QString::fromLatin1(func);
         }
     }
     return QString::fromLatin1(DEFAULT_FUNC);
 }
 
 QString MingwGenerator::GetFile()
 {
     if (file != NULL) {
         return QString::fromLatin1(file);
     }
     return QString::fromLatin1(DEFAULT_FILE);
 }
 
 int MingwGenerator::GetLine()
 {
     if (line > 0) {
         return line;
     }
     return -1;
 }
 
 void MingwGenerator::LoadSymbol(const QString &module, DWORD64 dwBaseAddr)
 {
     QString symbolFile = module;
     symbolFile.chop(4);
     symbolFile.append(QStringLiteral(".sym"));
 
     m_symbolsMap[module] = false; // default
     QString symbolType;
     do {
         bfd *abfd = bfd_openr(symbolFile.toLatin1().data(), NULL);
         if (abfd == NULL) {
             symbolType = QString::fromLatin1("no symbols loaded");
             break;
         }
         bfd_check_format(abfd, bfd_object);
         unsigned storage_needed = bfd_get_symtab_upper_bound(abfd);
         assert(storage_needed > 4);
         if (storage_needed <= 4) {
             // i don't know why the minimum value for this var is 4...
             symbolType = QString::fromLatin1("no symbols loaded");
             break;
         }
         asymbol **syms = (asymbol **)malloc(storage_needed);
         assert(syms);
         if (syms == NULL) {
             symbolType = QString::fromLatin1("no symbols loaded");
             break;
         }
         symbolType = QString::fromLatin1("symbols loaded");
         m_symbolsMap[module] = true;
 
         bfds.push_back(MyBFD(module, abfd, syms));
     } while (0);
 
     QString strOutput = QString::fromLatin1("Loaded %1 (%2)").arg(module).arg(symbolType);
     Q_EMIT DebugLine(strOutput);
 }