<div dir="ltr">Thank you Paual and Tomar .<div><br></div><div><a href="https://bugs.llvm.org/show_bug.cgi?id=47391">https://bugs.llvm.org/show_bug.cgi?id=47391</a><br></div><div><br></div><div>FYI ,</div><div>Two entries for the same file are handled by gnu assembler .</div><div><br></div><div>~Umesh</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Tue, Sep 1, 2020 at 11:02 PM Robinson, Paul <<a href="mailto:paul.robinson@sony.com">paul.robinson@sony.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div lang="EN-US">
<div class="gmail-m_6998355509455460121WordSection1">
<p class="MsoNormal">Aha. The two DIFile entries are describing the same file two different ways, but the file-tracking is not noticing that the two descriptions are equivalent. And I am convinced it is because the compilation command uses an absolute path.<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal">This could be a failure to deduplicate the file entries in the frontend, or a similar failure in MC once it starts handing out file numbers. (Possibly both!)<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal">Umesh, could you file a bug for this (at <a href="https://bugs.llvm.org" target="_blank">
https://bugs.llvm.org</a>) please? Use product “libraries” component “DebugInfo” and the right people will see it. (It is quite possibly my fault…) This might be a duplicate of an existing bug, but we can figure that out later.<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal">Thanks!<u></u><u></u></p>
<p class="MsoNormal">--paulr<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<div style="border-top:none;border-right:none;border-bottom:none;border-left:1.5pt solid blue;padding:0in 0in 0in 4pt">
<div>
<div style="border-right:none;border-bottom:none;border-left:none;border-top:1pt solid rgb(225,225,225);padding:3pt 0in 0in">
<p class="MsoNormal"><b>From:</b> cfe-dev <<a href="mailto:cfe-dev-bounces@lists.llvm.org" target="_blank">cfe-dev-bounces@lists.llvm.org</a>> <b>On Behalf Of
</b>Robinson, Paul via cfe-dev<br>
<b>Sent:</b> Tuesday, September 1, 2020 1:10 PM<br>
<b>To:</b> Tomar, Sourabh Singh <<a href="mailto:SourabhSingh.Tomar@amd.com" target="_blank">SourabhSingh.Tomar@amd.com</a>>; Umesh Kalappa <<a href="mailto:umesh.kalappa0@gmail.com" target="_blank">umesh.kalappa0@gmail.com</a>>; <a href="mailto:cfe-dev@lists.llvm.org" target="_blank">cfe-dev@lists.llvm.org</a> Developers <<a href="mailto:cfe-dev@lists.llvm.org" target="_blank">cfe-dev@lists.llvm.org</a>>; '<a href="mailto:llvm-dev@lists.llvm.org" target="_blank">llvm-dev@lists.llvm.org</a>' <<a href="mailto:llvm-dev@lists.llvm.org" target="_blank">llvm-dev@lists.llvm.org</a>><br>
<b>Subject:</b> Re: [cfe-dev] [llvm-dev] Filename's in DIBuileder<u></u><u></u></p>
</div>
</div>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal">Try using $PWD/test.cpp on the clang command line. I am seeing the duplicate DIFile entries, but not yet able to reproduce a .debug_line section with multiple directory entries.<u></u><u></u></p>
<p class="MsoNormal">--paulr<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<div style="border-top:none;border-right:none;border-bottom:none;border-left:1.5pt solid blue;padding:0in 0in 0in 4pt">
<div>
<div style="border-right:none;border-bottom:none;border-left:none;border-top:1pt solid rgb(225,225,225);padding:3pt 0in 0in">
<p class="MsoNormal"><b>From:</b> llvm-dev <<a href="mailto:llvm-dev-bounces@lists.llvm.org" target="_blank">llvm-dev-bounces@lists.llvm.org</a>> <b>On Behalf Of
</b>Tomar, Sourabh Singh via llvm-dev<br>
<b>Sent:</b> Tuesday, September 1, 2020 1:07 PM<br>
<b>To:</b> Umesh Kalappa <<a href="mailto:umesh.kalappa0@gmail.com" target="_blank">umesh.kalappa0@gmail.com</a>>; <a href="mailto:cfe-dev@lists.llvm.org" target="_blank">cfe-dev@lists.llvm.org</a> Developers <<a href="mailto:cfe-dev@lists.llvm.org" target="_blank">cfe-dev@lists.llvm.org</a>><br>
<b>Cc:</b> <a href="mailto:llvm-dev@lists.llvm.org" target="_blank">llvm-dev@lists.llvm.org</a><br>
<b>Subject:</b> Re: [llvm-dev] Filename's in DIBuileder<u></u><u></u></p>
</div>
</div>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="gmail-m_6998355509455460121msipheader4d0fcdd7" style="margin:0in 0in 0.0001pt"><span style="font-size:10pt;font-family:Arial,sans-serif;color:rgb(0,120,215)">[AMD Official Use Only - Internal Distribution Only]</span><u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal">Didn’t observed this on trunk(Using attached test.cpp): Trunk at 29ae4485950ed76faa94dabbd13bbe91d2b5c750<u></u><u></u></p>
<p class="MsoNormal"><br>
$clang++ -std=c++14 -g test.cpp -c -S -emit-llvm -o - | awk /DIFile/<u></u><u></u></p>
<p class="MsoNormal">!3 = !DIFile(filename: "test.cpp", directory: "/home/")<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal">$ clang++ -std=c++14 -g test.cpp -c -o - | llvm-dwarfdump -debug-line -<u></u><u></u></p>
<p class="MsoNormal">[…]<u></u><u></u></p>
<p class="MsoNormal">file_names[ 1]:<u></u><u></u></p>
<p class="MsoNormal"> name: "test.cpp"<u></u><u></u></p>
<p class="MsoNormal"> dir_index: 0<u></u><u></u></p>
<p class="MsoNormal"> mod_time: 0x00000000<u></u><u></u></p>
<p class="MsoNormal"> length: 0x00000000<u></u><u></u></p>
<p class="MsoNormal">[…]<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal">Did I missed something, while reproducing ? ? <u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal">--Sourabh<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<div>
<div style="border-right:none;border-bottom:none;border-left:none;border-top:1pt solid rgb(225,225,225);padding:3pt 0in 0in">
<p class="MsoNormal"><b>From:</b> llvm-dev <<a href="mailto:llvm-dev-bounces@lists.llvm.org" target="_blank">llvm-dev-bounces@lists.llvm.org</a>>
<b>On Behalf Of </b>Umesh Kalappa via llvm-dev<br>
<b>Sent:</b> Tuesday, September 1, 2020 9:50 PM<br>
<b>To:</b> LLVM Developers Mailing List <<a href="mailto:llvm-dev@lists.llvm.org" target="_blank">llvm-dev@lists.llvm.org</a>>;
<a href="mailto:cfe-dev@lists.llvm.org" target="_blank">cfe-dev@lists.llvm.org</a> Developers <<a href="mailto:cfe-dev@lists.llvm.org" target="_blank">cfe-dev@lists.llvm.org</a>><br>
<b>Subject:</b> [llvm-dev] Filename's in DIBuileder<u></u><u></u></p>
</div>
</div>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal">[CAUTION: External Email] <u></u><u></u></p>
<div>
<div>
<div>
<p class="MsoNormal">Hi All ,<u></u><u></u></p>
</div>
<div>
<p class="MsoNormal"><u></u> <u></u></p>
</div>
<div>
<p class="MsoNormal">We have a scenario in our debugger to handle the file index in the debug_ine info like
<br>
<br>
$llvm-dwarfdump -debug-line test.o <br>
file_names[ 1]:<br>
name: "test.cpp"<br>
dir_index: 0<br>
mod_time: 0x00000000<br>
length: 0x00000000<br>
file_names[ 2]:<br>
name: "test.cpp"<br>
dir_index: 1<br>
mod_time: 0x00000000<br>
length: 0x00000000<br>
<br>
Address Line Column File ISA Discriminator Flags<br>
------------------ ------ ------ ------ --- ------------- -------------<br>
0x0000000000000000 12 0 1 0 0 is_stmt<br>
0x0000000000000008 13 1 1 0 0 is_stmt prologue_end<br>
0x0000000000000010 16 0 1 0 0 is_stmt<br>
0x0000000000000018 17 1 1 0 0 is_stmt prologue_end<br>
0x0000000000000020 20 0 1 0 0 is_stmt<br>
0x0000000000000028 21 9 1 0 0 is_stmt prologue_end<br>
0x000000000000002f 22 9 1 0 0 is_stmt<br>
0x0000000000000032 22 10 1 0 0<br>
0x0000000000000035 22 7 1 0 0<br>
0x000000000000003c 23 1 1 0 0 is_stmt<br>
0x0000000000000040 25 0 1 0 0 is_stmt<br>
0x0000000000000044 25 13 1 0 0 is_stmt prologue_end<br>
0x0000000000000080 0 0 2 0 0 is_stmt<br>
0x000000000000008b 0 0 2 0 0 is_stmt end_sequence<br>
<br>
<br>
the debug info is emitted by the DIBuilder like <br>
<br>
!3 = !DIFile(filename: "/folk/tmp/test/test.cpp", directory: "/folk/tmp/test")<br>
!45 = distinct !DISubprogram(linkageName: "_GLOBAL__sub_I_test.cpp", scope: !3, file: !3, type: !46, flags: DIFlagArtificial, spFlags: DISPFlagLocalToUnit | DISPFlagDefinition, unit: !2, retainedNodes: !4)<br>
<br>
!8 = !DIFile(filename: "test.cpp", directory: "/folk/tmp/test")<br>
!16 = !DISubprogram(name: "proc", linkageName: "_ZN4test4procEv", scope: !9, file: !8, line: 8, type: !12, scopeLine: 8, flags: DIFlagPublic | DIFlagPrototyped, spFlags: 0)<br>
<br>
Latest clang trunk used like <br>
<br>
$clang -std=c++14 -g -eimit-llvm -S /folk/tmp/test/test.cpp<br>
<br>
and the respective files like test.cc ,test.ll and test.s are attached in the mail for the reference.<br>
<br>
the scenario is that why the file-name 's are different is both cases ,where "ZN4test4procEv" is the user defined function and "_GLOBAL__sub_I_test.cpp"<br>
is generated for the static initialisation ,which leads to the two file index like 1 and 2 for two files in the filename table ,that confuse our debugger .<br>
<br>
So we like to hear from experts here ,before we investigate the DIBuilder to fix the same.<u></u><u></u></p>
</div>
<div>
<p class="MsoNormal"><u></u> <u></u></p>
</div>
<div>
<p class="MsoNormal">Thank you <br>
~Umesh <u></u><u></u></p>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</blockquote></div>