<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40"><head><META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=us-ascii"><meta name=Generator content="Microsoft Word 15 (filtered medium)"><style><!--
/* Font Definitions */
@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
@font-face
{font-family:Consolas;
panose-1:2 11 6 9 2 2 4 3 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
margin-bottom:.0001pt;
font-size:11.0pt;
font-family:"Calibri",sans-serif;}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:#0563C1;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:#954F72;
text-decoration:underline;}
pre
{mso-style-priority:99;
mso-style-link:"HTML Preformatted Char";
margin:0in;
margin-bottom:.0001pt;
font-size:10.0pt;
font-family:"Courier New";}
span.HTMLPreformattedChar
{mso-style-name:"HTML Preformatted Char";
mso-style-priority:99;
mso-style-link:"HTML Preformatted";
font-family:"Courier New";}
p.msonormal0, li.msonormal0, div.msonormal0
{mso-style-name:msonormal;
mso-margin-top-alt:auto;
margin-right:0in;
mso-margin-bottom-alt:auto;
margin-left:0in;
font-size:11.0pt;
font-family:"Calibri",sans-serif;}
span.EmailStyle20
{mso-style-type:personal;
font-family:"Calibri",sans-serif;
color:windowtext;}
span.EmailStyle22
{mso-style-type:personal-reply;
font-family:"Calibri",sans-serif;
color:windowtext;}
.MsoChpDefault
{mso-style-type:export-only;
font-size:10.0pt;}
@page WordSection1
{size:8.5in 11.0in;
margin:1.0in 1.0in 1.0in 1.0in;}
div.WordSection1
{page:WordSection1;}
--></style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]--></head><body lang=EN-US link="#0563C1" vlink="#954F72"><div class=WordSection1><p class=MsoNormal>Instead of setting the sysroot, try the command<o:p></o:p></p><p class=MsoNormal>image search-paths add / /path/to/remote/shared/libraries/<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>That adds to the list that the dynamic loader uses to map shared object paths.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>It uses a simple text substitution, so in the above case,<o:p></o:p></p><p class=MsoNormal>/usr/lib/libc.so<o:p></o:p></p><p class=MsoNormal>Becomes<o:p></o:p></p><p class=MsoNormal>/path/to/remote/shared/libraries/usr/lib/libc.so<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Matching up trailing slashes is critical, as I learned the hard way!<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Ted<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal>--<o:p></o:p></p><p class=MsoNormal>Qualcomm Innovation Center, Inc.<o:p></o:p></p><p class=MsoNormal>The Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, a Linux Foundation Collaborative Project<o:p></o:p></p></div><p class=MsoNormal><o:p> </o:p></p><div style='border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in 4.0pt'><div><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b>From:</b> lldb-dev [mailto:lldb-dev-bounces@lists.llvm.org] <b>On Behalf Of </b>Eugene Birukov via lldb-dev<br><b>Sent:</b> Friday, July 20, 2018 1:13 PM<br><b>To:</b> lldb-dev@lists.llvm.org<br><b>Subject:</b> [lldb-dev] LLDB does not respect platform sysroot when loading core on Linux<o:p></o:p></p></div></div><p class=MsoNormal><o:p> </o:p></p><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></div></div></body></html>