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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Fission interacts poorly with crash reporting"
href="http://llvm.org/bugs/show_bug.cgi?id=16928">16928</a>
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<th>Summary</th>
<td>Fission interacts poorly with crash reporting
</td>
</tr>
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<th>Product</th>
<td>clang
</td>
</tr>
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<th>Version</th>
<td>unspecified
</td>
</tr>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>All
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
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<th>Keywords</th>
<td>googler
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
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<th>Priority</th>
<td>P
</td>
</tr>
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<th>Component</th>
<td>Driver
</td>
</tr>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>dblaikie@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>echristo@gmail.com, llvmbugs@cs.uiuc.edu
</td>
</tr>
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>Filing off the cuff (for me or Eric or anyone to look at more closely at some
point) - it looks, at first glance, like fission (-gsplit-dwarf) is interacting
poorly with Clang's crash reporting functionality.
For example, I got a crash report with the following .sh file:
/mnt/fast/dev/llvm/build/clang/debug/bin/clang-3.3 -cc1 -triple
x86_64-unknown-linux-gnu -emit-obj -mrelax-all -disable-free -main-file-name
opt.cpp -mrelocation-model pic -pic-level 2 -mdisable-fp-elim -fmath-errno
-masm-verbose -mconstructor-aliases -munwind-tables -target-cpu x86-64 -g -g
-backend-option -split-dwarf=Enable -D "_DEBUG" -D "_GNU_SOURCE" -D
"__STDC_CONSTANT_MACROS" -D "__STDC_FORMAT_MACROS" -D "__STDC_LIMIT_MACROS" -D
"opt_EXPORTS" -Wall -W -Wno-unused-parameter -Wwrite-strings
-Wmissing-field-initializers -Wno-long-long -Wcovered-switch-default
-Wnon-virtual-dtor -Werror -pedantic -std=c++11 -fconst-strings
-fdeprecated-macro -ferror-limit 19 -fmessage-length 0
-fvisibility-inlines-hidden -mstackrealign -fno-rtti -fobjc-runtime=gcc
-fobjc-default-synthesize-properties -fdiagnostics-show-option
-fcolor-diagnostics -vectorize-slp -x c++
/usr/local/google/home/blaikie/dev/llvm/src/tools/opt/opt.cpp -split-dwarf-file
opt-65300c.cpp.dwo
Notice that the '.cpp' file name has not been modified to refer to the crash
report post-processed file, but the split-dwarf file name seems to have been
changed.
Hand modifying the script/command to refer to opt-65300c.cpp produces the
expected reproducible crash.</pre>
</div>
</p>
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