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<base href="http://llvm.org/bugs/" />
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<body><table border="1" cellspacing="0" cellpadding="8">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Malloc error "pointer being freed was not allocated"."
href="http://llvm.org/bugs/show_bug.cgi?id=18109">18109</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>Malloc error "pointer being freed was not allocated".
</td>
</tr>
<tr>
<th>Product</th>
<td>clang
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
<tr>
<th>OS</th>
<td>MacOS X
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>Static Analyzer
</td>
</tr>
<tr>
<th>Assignee</th>
<td>kremenek@apple.com
</td>
</tr>
<tr>
<th>Reporter</th>
<td>hr.deepak@tcs.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=11642" name="attach_11642" title="PluginChecker.cpp: Source code of plugin. .so: plugin build, example.c: C code on which test is to done error.txt: dump on the terminal run, failure folder built by clang.">attachment 11642</a> <a href="attachment.cgi?id=11642&action=edit" title="PluginChecker.cpp: Source code of plugin. .so: plugin build, example.c: C code on which test is to done error.txt: dump on the terminal run, failure folder built by clang.">[details]</a></span>
PluginChecker.cpp: Source code of plugin. .so: plugin build, example.c: C code
on which test is to done error.txt: dump on the terminal run, failure folder
built by clang.
I was trying to build a simple plugin for static analyzer of clang. The plugin
will simply report all the printf function call in a given .c file. It may not
do anything fruitful, but a simple start for me.
I was able to build a dynamic library with the following command.
g++ -share -fPIC -I~/static_plugin/llvm/include
-I~static_plugin/build/include -D_DEBUG -D_GNU_SOURCE -D__STDC_CONSTANT_MACROS
-D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -g -fvisibility-inlines-hidden
-fno-exceptions -fno-rtti -fno-common -Woverloaded-virtual -Wcast-qual
-I~/static_plugin/llvm/tools/clang/include
-I~/static_plugin/build/tools/clang/include
-L~/static_plugin/build/Debug+Asserts/lib -lz -lpthread -lcurses -lm -undefined
dynamic_lookup -o PrintfChecker.so PrintfChecker.cpp
When I tested it on a sample C code containing a printf call, a runtime error
is generated. I have attached the error message dumped on terminal as
error.txt. I have also attached the failure folder as zip and the C code as
example.c. I used the following cmd to test the C code.
./static_plugin/llvm/tools/clang/tools/scan-build/scan-build
--use-analyzer=~/static_plugin/build/Debug+Asserts/bin/clang -load-plugin
./PrintfChecker.so -enable-checker security.PrintfChecker gcc -c example.c</pre>
</div>
</p>
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