<div dir="ltr">> <span style="font-family:arial,sans-serif;font-size:13px">this means that lldb is getting back 0x00's when it is trying to read memory out of the core file I expect.</span><div class="" style="font-family:arial,sans-serif;font-size:13px">
</div><div class="" style="font-family:arial,sans-serif;font-size:13px"><br></div><div class="" style="font-family:arial,sans-serif;font-size:13px">Yep, I remember that one from last Friday! :-)</div><div class="" style="font-family:arial,sans-serif;font-size:13px">
<br></div><div class="" style="font-family:arial,sans-serif;font-size:13px">> (lldb) im loo -a $pc</div><div class="" style="font-family:arial,sans-serif;font-size:13px"><br></div><div class="" style="font-family:arial,sans-serif;font-size:13px">
I'll give that a shot, thanks Jason.</div><div class="" style="font-family:arial,sans-serif;font-size:13px"><br></div></div><div class="gmail_extra"><br><br><div class="gmail_quote">On Fri, Feb 7, 2014 at 4:01 PM, Jason Molenda <span dir="ltr"><<a href="mailto:jmolenda@apple.com" target="_blank">jmolenda@apple.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">I'd start by seeing if lldb knows where the binaries are loaded in this session. e.g.<br>
<br>
(lldb) im loo -a $pc<br>
<br>
It doesn't look like lldb knows what Module you're in and doesn't have a function/symbol name either. There's probably no eh_frame unwind info and IIRC your system's libraries are all built -fomit-frame-pointer so a blind stack walk will fail.<br>
<br>
I don't know how solid lldb's corefile support is on Linux. It may be that you're not able to find where all the solibs are loaded when doing core file debugging.<br>
<br>
This is also a little disheartening,<br>
<br>
* thread #1: tid = 0, 0x00007ffba3bb2425, name = 'lldb-gdbserver', stop reason = signal SIGABRT<br>
frame #0: 0x00007ffba3bb2425<br>
-> 0x7ffba3bb2425: addb %al, (%rax)<br>
0x7ffba3bb2427: addb %al, (%rax)<br>
0x7ffba3bb2429: addb %al, (%rax)<br>
0x7ffba3bb242b: addb %al, (%rax)<br>
<br>
this means that lldb is getting back 0x00's when it is trying to read memory out of the core file I expect.<br>
<div class="im HOEnZb"><br>
<br>
<br>
On Feb 7, 2014, at 3:49 PM, Todd Fiala <<a href="mailto:tfiala@google.com">tfiala@google.com</a>> wrote:<br>
<br>
> Yeah - I hit "enter" by accident :-) The next comment fills in the rest. Short version: gdb + gold linker + assert = backtrace, lldb + gold linker = assert = failure.<br>
><br>
> Not high priority, but will stop me from using the gold linker even though it gives me a 6-7% speed increase.<br>
><br>
><br>
> On Fri, Feb 7, 2014 at 3:32 PM, <<a href="mailto:bugzilla-daemon@llvm.org">bugzilla-daemon@llvm.org</a>> wrote:<br>
> Bug ID 18769<br>
> Summary lldb fails to stack unwind gold linker exes that assert<br>
> Product lldb<br>
> Version unspecified<br>
> Hardware PC<br>
> OS Linux<br>
> Status NEW<br>
> Severity normal<br>
> Priority P<br>
> Component All Bugs<br>
> Assignee <a href="mailto:lldb-dev@cs.uiuc.edu">lldb-dev@cs.uiuc.edu</a><br>
> Reporter <a href="mailto:tfiala@google.com">tfiala@google.com</a><br>
> Classification Unclassified<br>
><br>
> I'm hitting an assertion in lldb-gdbserver. On Ubuntu 12.04 x86_64, using the<br>
> gold linker 'sudo apt-get install binutils-gold', with a cmake/ninja build, I<br>
> am not able to get a valid backtrace out of lldb for lldb-gdbserver when it<br>
> generates<br>
><br>
><br>
</div><div class="HOEnZb"><div class="h5">> You are receiving this mail because:<br>
> • You are the assignee for the bug.<br>
><br>
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><br>
><br>
><br>
><br>
> --<br>
> Todd Fiala | Software Engineer | <a href="mailto:tfiala@google.com">tfiala@google.com</a> | <a href="tel:650-943-3180" value="+16509433180">650-943-3180</a><br>
><br>
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<br>
</div></div></blockquote></div><br><br clear="all"><div><br></div>-- <br><div dir="ltr"><table cellspacing="0" cellpadding="0" style="color:rgb(136,136,136);font-family:'Times New Roman'"><tbody><tr style="color:rgb(85,85,85);font-family:sans-serif;font-size:small">
<td nowrap style="border-top-style:solid;border-top-color:rgb(213,15,37);border-top-width:2px">Todd Fiala |</td><td nowrap style="border-top-style:solid;border-top-color:rgb(51,105,232);border-top-width:2px"> Software Engineer |</td>
<td nowrap style="border-top-style:solid;border-top-color:rgb(0,153,57);border-top-width:2px"> <a href="mailto:tfiala@google.com" style="color:rgb(17,85,204)" target="_blank"><span style="background-color:rgb(255,255,204);color:rgb(34,34,34);background-repeat:initial initial">tfiala@google.com</span></a> |</td>
<td nowrap style="border-top-style:solid;border-top-color:rgb(238,178,17);border-top-width:2px"><font color="#1155cc"> <a>650-943-3180</a></font></td></tr></tbody></table><br></div>
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