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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Interpreter allocates argv on heap"
href="http://llvm.org/bugs/show_bug.cgi?id=15503">15503</a>
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<th>Summary</th>
<td>Interpreter allocates argv on heap
</td>
</tr>
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<th>Product</th>
<td>libraries
</td>
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<th>Version</th>
<td>3.1
</td>
</tr>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>Linux
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
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<th>Component</th>
<td>Interpreter
</td>
</tr>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
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<th>Reporter</th>
<td>addarathbone@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>problem: ExecutionEngine::runFunctionAsMain places command line arguments on
heap
expected: command line arguments are allocated on stack
Hello,
I have written a pass (for educational purposes), that restrictes a jitted
program memory access to 4GB by modifying load and store operations as well as
the JITMemoryManager.
Thereby I recognized an undocumented/unwanted behaviour. The command line
arguments of the interpreted/jitted program are not located on the stack.
Example program:
====== argv-stack.c ======
#include <stdio.h>
int main(int argc, char *argv[]) {
int seed;
printf("stack: %p\n", &seed);
printf("argv: %p\n", argv);
}
$ clang -S -emit-llvm argv-stack.c && lli argv-stack.s
stack: 0x7fff38142854
argv: 0x7d5580
For me this results in a crash of my program.</pre>
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