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<p class="MsoNormal">Fix FDE indexing while scan debug_info section.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">There are some <span style="color:black">differences between eh_frame and debug_frame formats that are not considered by
</span><span style="font-size:9.5pt;font-family:Consolas;color:#2B91AF">DWARFCallFrameInfo</span><span style="font-size:9.5pt;font-family:Consolas;color:black">::GetFDEIndex</span><span style="color:black">.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black">An FDE entry contains </span>CIE_pointer
<span style="color:black">in debug_frame in same place as cie_id in eh_frame. As described in
<a href="http://www.dwarfstd.org/doc/dwarf-2.0.0.pdf">dwarf standard</a> (section 6.4.1),<o:p></o:p></span></p>
<p class="MsoNormal">CIE_pointer is an “offset into the .debug_frame section”. So, variable cie_offset should be equal
<span style="color:black">cie_id for debug_frame.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black">FDE entries with zeroth CIE pointer (which is actually placed in
</span>cie_id variable<span style="color:black">) shouldn’t be ignored also.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:black">I had same issue as described here
<a href="http://lists.llvm.org/pipermail/lldb-dev/2014-October/005520.html">http://lists.llvm.org/pipermail/lldb-dev/2014-October/005520.html</a> , and these changes have fixed it for me (with "m_is_eh_frame" set to false, of course).
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Courier New";mso-fareast-language:RU"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Arial",sans-serif;mso-fareast-language:RU">Tatyana Krasnukha<o:p></o:p></span></b></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Arial",sans-serif;mso-fareast-language:RU">Software Engineer, Sr. I, Solutions Group, Synopsys Inc.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Arial",sans-serif;mso-fareast-language:RU">w +7.812.408.7463 | m +7 981 757-4491 |
</span><a href="mailto:tatyana@synopsys.com"><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:blue;mso-fareast-language:RU">tatyana@synopsys.com</span></a><span style="font-size:9.0pt;font-family:"Arial",sans-serif;mso-fareast-language:RU"><o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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