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<p class="MsoNormal">Hello,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I would appreciate advise how to fix this correctly…<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I have a core dump from somebody’s RHEL Linux and I am trying to open it on my Ubuntu. I have all the shared libraries from the target sitting under my local directory. So, GDB happily opens the core after I issue “<span style="font-size:9.0pt;font-family:Consolas">set
sysroot /path/to/local/root</span>”, but LLDB release_60 fails to do it.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I follow instructions from Greg’s Clayton mail <a href="http://lists.llvm.org/pipermail/lldb-dev/2016-January/009236.html">
http://lists.llvm.org/pipermail/lldb-dev/2016-January/009236.html</a> :<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:10.0pt;font-family:"Courier New";color:black">(lldb) platform select --sysroot /path/to/remote/shared/libraries remote-linux<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:10.0pt;font-family:"Courier New";color:black">(lldb) <load core><o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Under debugger, I see that LLDB successfully created Platform object with m_sdk_root set to my path and the Target uses it as its platform:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:0in;margin-left:.5in;margin-bottom:.0001pt">
<span style="font-size:9.0pt;font-family:Consolas">(gdb) p target_sp->m_platform_sp->m_sdk_sysroot<o:p></o:p></span></p>
<p style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:0in;margin-left:.5in;margin-bottom:.0001pt">
<span style="font-size:9.0pt;font-family:Consolas">$42 = {<o:p></o:p></span></p>
<p style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:0in;margin-left:.5in;margin-bottom:.0001pt">
<span style="font-size:9.0pt;font-family:Consolas"> m_string = 0x80e070 "/tmp/debugcore.3WyoW4/lib2"<o:p></o:p></span></p>
<p style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:0in;margin-left:.5in;margin-bottom:.0001pt">
<span style="font-size:9.0pt;font-family:Consolas">}<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">But this value is not used when it comes to <span style="font-size:9.0pt;font-family:Consolas">
DynamicLoaderPOSIXDYLD::LoadAllCurrentModules</span>. <o:p></o:p></p>
<p style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:0in;margin-left:.5in;margin-bottom:.0001pt">
<span style="font-size:9.0pt;font-family:Consolas">(gdb) bt<o:p></o:p></span></p>
<p style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:0in;margin-left:.5in;margin-bottom:.0001pt">
<span style="font-size:9.0pt;font-family:Consolas">#0 lldb_private::ModuleList::GetSharedModule (module_spec=..., module_sp=std::shared_ptr (empty) 0x0,<o:p></o:p></span></p>
<p style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:0in;margin-left:.5in;margin-bottom:.0001pt">
<span style="font-size:9.0pt;font-family:Consolas"> module_search_paths_ptr=0x83ad60, old_module_sp_ptr=0x7fffffffbb50, did_create_ptr=0x7fffffffbb07,<o:p></o:p></span></p>
<p style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:0in;margin-left:.5in;margin-bottom:.0001pt">
<span style="font-size:9.0pt;font-family:Consolas"> always_create=false) at /home/eugene/llvm/tools/lldb/source/Core/ModuleList.cpp:710<o:p></o:p></span></p>
<p style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:0in;margin-left:.5in;margin-bottom:.0001pt">
<span style="font-size:9.0pt;font-family:Consolas">#1 0x00007fffedc2d130 in lldb_private::Platform::<lambda(const lldb_private::ModuleSpec&)>::operator()(const lldb_private::ModuleSpec &) const (__closure=0x8581b0, spec=...)<o:p></o:p></span></p>
<p style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:0in;margin-left:.5in;margin-bottom:.0001pt">
<span style="font-size:9.0pt;font-family:Consolas"> at /home/eugene/llvm/tools/lldb/source/Target/Platform.cpp:234<o:p></o:p></span></p>
<p style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:0in;margin-left:.5in;margin-bottom:.0001pt">
<span style="font-size:9.0pt;font-family:Consolas">#2 0x00007fffedc34ff2 in std::_Function_handler<lldb_private::Status(const lldb_private::ModuleSpec&), lldb_private::Platform::GetSharedModule(const lldb_private::ModuleSpec&, lldb_private::Process*, lldb::ModuleSP&,
const lldb_private::FileSpecList*, lldb::ModuleSP*, bool*)::<lambda(const lldb_private::ModuleSpec&)> >::_M_invoke(const std::_Any_data &, const lldb_private::ModuleSpec &) (__functor=..., __args#0=...) at /usr/include/c++/5/functional:1857<o:p></o:p></span></p>
<p style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:0in;margin-left:.5in;margin-bottom:.0001pt">
<span style="font-size:9.0pt;font-family:Consolas">#3 0x00007fffedc37978 in std::function<lldb_private::Status (lldb_private::ModuleSpec const&)>::operator()(lldb_private::ModuleSpec const&) const (this=0x7fffffffba80, __args#0=...) at /usr/include/c++/5/functional:2267<o:p></o:p></span></p>
<p style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:0in;margin-left:.5in;margin-bottom:.0001pt">
<span style="font-size:9.0pt;font-family:Consolas">#4 0x00007fffedc3375a in lldb_private::Platform::GetRemoteSharedModule(lldb_private::ModuleSpec const&, lldb_private::Process*, std::shared_ptr<lldb_private::Module>&, std::function<lldb_private::Status (lldb_private::ModuleSpec
const&)> const&, bool*) (this=0x839330, module_spec=..., process=0x84d310, module_sp=std::shared_ptr (empty) 0x0,<o:p></o:p></span></p>
<p style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:0in;margin-left:.5in;margin-bottom:.0001pt">
<span style="font-size:9.0pt;font-family:Consolas"> module_resolver=..., did_create_ptr=0x7fffffffbb07)<o:p></o:p></span></p>
<p style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:0in;margin-left:.5in;margin-bottom:.0001pt">
<span style="font-size:9.0pt;font-family:Consolas"> at /home/eugene/llvm/tools/lldb/source/Target/Platform.cpp:1628<o:p></o:p></span></p>
<p style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:0in;margin-left:.5in;margin-bottom:.0001pt">
<span style="font-size:9.0pt;font-family:Consolas">#5 0x00007fffedc2d2cd in lldb_private::Platform::GetSharedModule (this=0x839330, module_spec=...,<o:p></o:p></span></p>
<p style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:0in;margin-left:.5in;margin-bottom:.0001pt">
<span style="font-size:9.0pt;font-family:Consolas"> process=0x84d310, module_sp=std::shared_ptr (empty) 0x0, module_search_paths_ptr=0x83ad60,<o:p></o:p></span></p>
<p style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:0in;margin-left:.5in;margin-bottom:.0001pt">
<span style="font-size:9.0pt;font-family:Consolas"> old_module_sp_ptr=0x7fffffffbb50, did_create_ptr=0x7fffffffbb07)<o:p></o:p></span></p>
<p style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:0in;margin-left:.5in;margin-bottom:.0001pt">
<span style="font-size:9.0pt;font-family:Consolas"> at /home/eugene/llvm/tools/lldb/source/Target/Platform.cpp:240<o:p></o:p></span></p>
<p style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:0in;margin-left:.5in;margin-bottom:.0001pt">
<span style="font-size:9.0pt;font-family:Consolas">#6 0x00007fffedc9957c in lldb_private::Target::GetSharedModule (this=0x846960, module_spec=..., error_ptr=0x0)<o:p></o:p></span></p>
<p style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:0in;margin-left:.5in;margin-bottom:.0001pt">
<span style="font-size:9.0pt;font-family:Consolas"> at /home/eugene/llvm/tools/lldb/source/Target/Target.cpp:1952<o:p></o:p></span></p>
<p style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:0in;margin-left:.5in;margin-bottom:.0001pt">
<span style="font-size:9.0pt;font-family:Consolas">#7 0x00007fffef8e0d11 in lldb_private::DynamicLoader::LoadModuleAtAddress (this=0x9a0a70, file=...,<o:p></o:p></span></p>
<p style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:0in;margin-left:.5in;margin-bottom:.0001pt">
<span style="font-size:9.0pt;font-family:Consolas"> link_map_addr=139700267943784, base_addr=139700263510016, base_addr_is_offset=true)<o:p></o:p></span></p>
<p style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:0in;margin-left:.5in;margin-bottom:.0001pt">
<span style="font-size:9.0pt;font-family:Consolas"> at /home/eugene/llvm/tools/lldb/source/Core/DynamicLoader.cpp:171<o:p></o:p></span></p>
<p style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:0in;margin-left:.5in;margin-bottom:.0001pt">
<span style="font-size:9.0pt;font-family:Consolas">#8 0x00007fffedd8fb55 in DynamicLoaderPOSIXDYLD::LoadAllCurrentModules (this=0x9a0a70)<o:p></o:p></span></p>
<p style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:0in;margin-left:.5in;margin-bottom:.0001pt">
<span style="font-size:9.0pt;font-family:Consolas"> at /home/eugene/llvm/tools/lldb/source/Plugins/DynamicLoader/POSIX-DYLD/DynamicLoaderPOSIXDYLD.cpp:537<o:p></o:p></span></p>
<p style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:0in;margin-left:.5in;margin-bottom:.0001pt">
<span style="font-size:9.0pt;font-family:Consolas">#9 0x00007fffedd8de52 in DynamicLoaderPOSIXDYLD::DidAttach (this=0x9a0a70)<o:p></o:p></span></p>
<p style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:0in;margin-left:.5in;margin-bottom:.0001pt">
<span style="font-size:9.0pt;font-family:Consolas"> at /home/eugene/llvm/tools/lldb/source/Plugins/DynamicLoader/POSIX-DYLD/DynamicLoaderPOSIXDYLD.cpp:171<o:p></o:p></span></p>
<p style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:0in;margin-left:.5in;margin-bottom:.0001pt">
<span style="font-size:9.0pt;font-family:Consolas">#10 0x00007fffedc476d9 in lldb_private::Process::LoadCore (this=0x84d310)<o:p></o:p></span></p>
<p style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:0in;margin-left:.5in;margin-bottom:.0001pt">
<span style="font-size:9.0pt;font-family:Consolas"> at /home/eugene/llvm/tools/lldb/source/Target/Process.cpp:2853<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I simply do not see any reference to sysroot in the GetSharedModule() code. What is there – it is only scanning
<span style="font-size:9.0pt;font-family:"Courier New"">module_search_paths_ptr</span> looking for file. This would not work because the scan ignores the directory part of the module: it takes the next path from the list and appends the file name. What I need
instead – take m_sdk_sysroot from Platform and append the full module – including directory – to it.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Unfortunately, GetSharedModule() is a static method and does not have any clue what is current platform or current target. So, should I pass another argument down there with sysroot or what? I have correct platform object at frame 4.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Thanks,<o:p></o:p></p>
<p class="MsoNormal">Eugene<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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