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<base href="http://llvm.org/bugs/" />
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - opt -print-callgraph outputs unescaped \x01 characters from symbol names."
href="http://llvm.org/bugs/show_bug.cgi?id=20095">20095</a>
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<th>Summary</th>
<td>opt -print-callgraph outputs unescaped \x01 characters from symbol names.
</td>
</tr>
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<th>Product</th>
<td>tools
</td>
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<th>Version</th>
<td>3.4
</td>
</tr>
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<th>Hardware</th>
<td>Macintosh
</td>
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<th>OS</th>
<td>MacOS X
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
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<th>Severity</th>
<td>normal
</td>
</tr>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>opt
</td>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
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<th>Reporter</th>
<td>gwk.lists@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
</td>
</tr>
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>Apparently OSX (or maybe LLVM) uses \01 (SOH) characters for some symbol names,
e.g. @"\01_fputs" (I'm curious why such strange symbols are used?). These are
escaped in the IR from clang -S -emit-llvm. However, when opt prints them out
using -print-callgraph it does not escape them, which seems wrong. below is a
repro shell script. grep will output lines that contain actual SOH characters;
these are not visible on the command line but cause my post-processing script
to choke.
printf "#include <stdio.h>\nint main() { fputs(\"hi\\\\n\", stdout); return
0; }\n" > hi.c
clang -S -emit-llvm -o hi.llvm hi.c
opt -analyze -print-callgraph hi.llvm 2> hi.cg
grep $'\x01' hi.cg
also, despite the fact that the -print-callgraph option is clearly working, opt
is outputting the following weird message to stdout:
Printing analysis 'Print a call graph':
Pass::print not implemented for pass: 'Print a call graph'!
this is with the clang 3.4.1 binary build for darwin distributed by llvm.org.
$ clang --version
clang version 3.4.1 (tags/RELEASE_34/dot1-rc2)
Target: x86_64-apple-darwin13.2.0
Thread model: posix
$ opt --version
LLVM (<a href="http://llvm.org/">http://llvm.org/</a>):
LLVM version 3.4.1
Optimized build.
Default target: x86_64-apple-darwin13.2.0
Host CPU: core-avx-i</pre>
</div>
</p>
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