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<base href="https://bugs.freedesktop.org/">
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<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Segfault when using LLVM7 -"
href="https://bugs.freedesktop.org/show_bug.cgi?id=108308">108308</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>Segfault when using LLVM7 -
</td>
</tr>
<tr>
<th>Product</th>
<td>Mesa
</td>
</tr>
<tr>
<th>Version</th>
<td>git
</td>
</tr>
<tr>
<th>Hardware</th>
<td>Other
</td>
</tr>
<tr>
<th>OS</th>
<td>All
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>medium
</td>
</tr>
<tr>
<th>Component</th>
<td>Drivers/Gallium/swr
</td>
</tr>
<tr>
<th>Assignee</th>
<td>mesa-dev@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>thiago@kde.org
</td>
</tr>
<tr>
<th>QA Contact</th>
<td>mesa-dev@lists.freedesktop.org
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=141967" name="attach_141967" title="Patch to make compile with LLVM 7">attachment 141967</a> <a href="attachment.cgi?id=141967&action=edit" title="Patch to make compile with LLVM 7">[details]</a></span> <a href='page.cgi?id=splinter.html&bug=108308&attachment=141967'>[review]</a>
Patch to make compile with LLVM 7
Build of d3682766f66b69ab636a2b9ca74db48fab68e024 using the attached patch to
make it compile with LLVM 7. When loading X, it crashes with the backtrace:
(gdb) bt
#6 <signal handler called>
#7 0x00007f1e48432c20 in llvm::djbHash (Buffer=..., H=0) at
/usr/src/debug/llvm-7.0.0.src/include/llvm/Support/DJB.h:23
#8 llvm::StringMapImpl::LookupBucketFor (this=<optimized out>, Name=...) at
/usr/src/debug/llvm-7.0.0.src/lib/Support/StringMap.cpp:84
#9 0x00007f1e486547f9 in llvm::StringMap<llvm::MDString,
llvm::BumpPtrAllocatorImpl<llvm::MallocAllocator, 4096ul, 4096ul>
<span class="quote">>::try_emplace<>(llvm::StringRef) (this=0xcd3be8, Key=...) at</span >
/usr/src/debug/llvm-7.0.0.src/include/llvm/ADT/StringMap.h:396
#10 0x00007f1e4864a271 in llvm::MDString::get (Context=..., Str=...) at
/usr/src/debug/llvm-7.0.0.src/lib/IR/Metadata.cpp:456
#11 0x00007f1e485c9bc6 in llvm::DINode::getCanonicalMDString (Context=...,
S=...)
at /usr/src/debug/llvm-7.0.0.src/include/llvm/IR/DebugInfoMetadata.h:181
#12 llvm::DIFile::getImpl (Context=..., Filename=..., Directory=..., CS=...,
Source=..., Storage=<optimized out>, ShouldCreate=true)
at /usr/src/debug/llvm-7.0.0.src/include/llvm/IR/DebugInfoMetadata.h:556
#13 0x00007f1e485c5e32 in llvm::DIFile::get (Context=..., Filename=...,
Directory=..., CS=..., Source=...)
at /usr/src/debug/llvm-7.0.0.src/include/llvm/IR/DebugInfoMetadata.h:571
#14 llvm::DIBuilder::createFile (this=<optimized out>,
this@entry=0x7ffd876022a0, Filename=..., Directory=..., CS=..., Source=...)
at /usr/src/debug/llvm-7.0.0.src/lib/IR/DIBuilder.cpp:215
#15 0x00007f1e4b41be11 in SwrJit::Gen_SWR_VERTEX_BUFFER_STATE
(pJitMgr=0xcd6e10) at /usr/include/llvm/ADT/StringRef.h:85
#16 SwrJit::Gen_SWR_FETCH_CONTEXT (pJitMgr=0xcd6e10) at
rasterizer/jitter/gen_state_llvm.h:903
#17 0x00007f1e4b41ecd3 in JitManager::JitManager (this=0xcd6e10,
simdWidth=<optimized out>, arch=<optimized out>, core=<optimized out>)
at rasterizer/jitter/JitManager.cpp:169
#18 0x00007f1e4b41fb0e in JitCreateContext
(targetSimdWidth=targetSimdWidth@entry=8, arch=arch@entry=0x7f1e4bb3dec9 "",
core=core@entry=0x7f1e4ba2d0f7 "swr") at
rasterizer/jitter/JitManager.cpp:507
#19 0x00007f1e4b3ce063 in swr_create_screen_internal
(winsys=winsys@entry=0xcd19b0) at swr_screen.cpp:1184
#20 0x00007f1e4b431692 in swr_create_screen (winsys=winsys@entry=0xcd19b0) at
swr_loader.cpp:74
#21 0x00007f1e4a9639f8 in sw_screen_create_named (driver=0x7f1e4ba2d0f7 "swr",
winsys=0xcd19b0)
at ../../../../src/gallium/auxiliary/target-helpers/sw_helper.h:39
#22 sw_screen_create (winsys=0xcd19b0) at
../../../../src/gallium/auxiliary/target-helpers/sw_helper.h:81
#23 0x00007f1e4b0bc316 in pipe_loader_sw_create_screen (dev=0xcd1940,
config=<optimized out>) at pipe_loader_sw.c:310
#24 0x00007f1e4b0bc12c in pipe_loader_create_screen (dev=0xcd1940) at
pipe_loader.c:137
#25 0x00007f1e4ae8b58c in dri_kms_init_screen (sPriv=0xccfc90) at dri2.c:2208
#26 0x00007f1e4ae86923 in driCreateNewScreen2 (scrn=0, fd=13,
extensions=<optimized out>, driver_extensions=<optimized out>,
driver_configs=0xc7af58, data=0xc7ad90) at dri_util.c:153
#27 0x00007f1e4c0de30e in dri_screen_create_dri2 (dri=dri@entry=0xc7ad90,
driver_name=<optimized out>) at backends/dri/gbm_dri.c:461
#28 0x00007f1e4c0de3ca in dri_screen_create_sw (dri=0xc7ad90) at
backends/dri/gbm_dri.c:549
#29 0x00007f1e4c0de6d8 in dri_device_create (fd=13) at
backends/dri/gbm_dri.c:1447
#30 0x00007f1e4c0dbbce in gbm_create_device (fd=13) at main/gbm.c:137
#7 0x00007f1e48432c20 in llvm::djbHash (Buffer=..., H=0) at
/usr/src/debug/llvm-7.0.0.src/include/llvm/Support/DJB.h:23
23 for (unsigned char C : Buffer.bytes())
Crashed on:
0x00007f1e48432c20 <+192>: movzbl (%rcx),%edi
%rcx is 0x3000000002
Buffer is:
$5 = {Data = 0x3000000002 <error: Cannot access memory at address
0x3000000002>, Length = 140726874677440}
Confirming on frame 14:
#14 llvm::DIBuilder::createFile (this=<optimized out>,
this@entry=0x7ffd876022a0, Filename=..., Directory=..., CS=..., Source=...)
at /usr/src/debug/llvm-7.0.0.src/lib/IR/DIBuilder.cpp:215
215 return DIFile::get(VMContext, Filename, Directory, CS, Source);
(gdb) x/2ga &Source
0x7ffd87602020: 0x3000000002 0x7ffd876020c0
Unfortunately, frame 15 (the first SWR one) is not debuggable due to the
inlining of StringRef inside the function and I can't find
"Gen_SWR_VERTEX_BUFFER_STATE" in the Mesa sources.</pre>
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