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<base href="https://bugs.llvm.org/">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - The two DIFile entries are describing the same file two different ways"
href="https://bugs.llvm.org/show_bug.cgi?id=47391">47391</a>
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<th>Summary</th>
<td>The two DIFile entries are describing the same file two different ways
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<th>Product</th>
<td>libraries
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<th>Version</th>
<td>trunk
</td>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>Windows NT
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<th>Status</th>
<td>NEW
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<th>Severity</th>
<td>enhancement
</td>
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<th>Priority</th>
<td>P
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<th>Component</th>
<td>DebugInfo
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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<th>Reporter</th>
<td>umesh.kalappa0@gmail.com
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<th>CC</th>
<td>jdevlieghere@apple.com, keith.walker@arm.com, llvm-bugs@lists.llvm.org, paul_robinson@playstation.sony.com
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<pre>Created <span class=""><a href="attachment.cgi?id=23918" name="attach_23918" title="Testcase">attachment 23918</a> <a href="attachment.cgi?id=23918&action=edit" title="Testcase">[details]</a></span>
Testcase
We have a scenario in our debugger to handle the file index in the debug_ine
info like
$llvm-dwarfdump -debug-line test.o
file_names[ 1]:
name: "test.cpp"
dir_index: 0
mod_time: 0x00000000
length: 0x00000000
file_names[ 2]:
name: "test.cpp"
dir_index: 1
mod_time: 0x00000000
length: 0x00000000
Address Line Column File ISA Discriminator Flags
------------------ ------ ------ ------ --- ------------- -------------
0x0000000000000000 12 0 1 0 0 is_stmt
0x0000000000000008 13 1 1 0 0 is_stmt prologue_end
0x0000000000000010 16 0 1 0 0 is_stmt
0x0000000000000018 17 1 1 0 0 is_stmt prologue_end
0x0000000000000020 20 0 1 0 0 is_stmt
0x0000000000000028 21 9 1 0 0 is_stmt prologue_end
0x000000000000002f 22 9 1 0 0 is_stmt
0x0000000000000032 22 10 1 0 0
0x0000000000000035 22 7 1 0 0
0x000000000000003c 23 1 1 0 0 is_stmt
0x0000000000000040 25 0 1 0 0 is_stmt
0x0000000000000044 25 13 1 0 0 is_stmt prologue_end
0x0000000000000080 0 0 2 0 0 is_stmt
0x000000000000008b 0 0 2 0 0 is_stmt end_sequence
the debug info is emitted by the DIBuilder like
!3 = !DIFile(filename: "/folk/tmp/test/test.cpp", directory: "/folk/tmp/test")
!45 = distinct !DISubprogram(linkageName: "_GLOBAL__sub_I_test.cpp", scope: !3,
file: !3, type: !46, flags: DIFlagArtificial, spFlags: DISPFlagLocalToUnit |
DISPFlagDefinition, unit: !2, retainedNodes: !4)
!8 = !DIFile(filename: "test.cpp", directory: "/folk/tmp/test")
!16 = !DISubprogram(name: "proc", linkageName: "_ZN4test4procEv", scope: !9,
file: !8, line: 8, type: !12, scopeLine: 8, flags: DIFlagPublic |
DIFlagPrototyped, spFlags: 0)
Latest clang trunk used like
$clang -std=c++14 -g -eimit-llvm -S /folk/tmp/test/test.cpp
and the respective files like test.cc ,test.ll and test.s are attached for the
reference.
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"
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 .
So we like to hear from experts here ,before we investigate the DIBuilder to
fix the same.</pre>
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