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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 --- - llvm-ld produces .bc file that does not terminate on execution"
href="http://llvm.org/bugs/show_bug.cgi?id=17112">17112</a>
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<th>Summary</th>
<td>llvm-ld produces .bc file that does not terminate on execution
</td>
</tr>
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<th>Product</th>
<td>tools
</td>
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<th>Version</th>
<td>3.1
</td>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>Linux
</td>
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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>llvm-ld
</td>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
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<th>Reporter</th>
<td>manishps824@gmail.com
</td>
</tr>
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<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
</td>
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=11148" name="attach_11148" title="Folder contaning all files.">attachment 11148</a> <a href="attachment.cgi?id=11148&action=edit" title="Folder contaning all files.">[details]</a></span>
Folder contaning all files.
I have 3 files say file 1,2,3. File 1 is main test file. File 2, file 3 contain
some definitions of helper functions. File 1 is instrumented with calls to the
helper functions in other two files using a pass i have written. I use two
procedures to execute the code.
1)Instrument the file 1 to get a .bc file. Use clang to get .bc files of file 2
and file 3. Use llc to get the corresponding .s files. Finally link them using
gcc to get executable. This executable that i get performs as expected.
2)Instrument the file 1 to get a .bc file. Use clang to get .bc files of file 2
and file 3. Use llvm-ld to link these .bc files to get final .bc file. But when
i use lli to execute this bytecode the program gets stuck in some infinite
loop.
Strange part is addition of few print statements file 3 and reapplication of
process 2 , produces a fully working bytecode.
I provide the all .bc and .s files . The code involves spawning a new thread.
Use following command to recreate.
1)
llvm-ld lib.bc tryAndcrashNoSwitchReplicated.bc handleFunctionPointers.bc -o
final
./final
2)
gcc lib.s handleFunctionPointers.s tryAndcrashNoSwitchReplicated.s -lpthread
./a.out</pre>
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