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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 --- - 64 bit lldb cannot call functions in 32 bit debuggees"
href="http://llvm.org/bugs/show_bug.cgi?id=16580">16580</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>64 bit lldb cannot call functions in 32 bit debuggees
</td>
</tr>
<tr>
<th>Product</th>
<td>lldb
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
<tr>
<th>OS</th>
<td>Linux
</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>All Bugs
</td>
</tr>
<tr>
<th>Assignee</th>
<td>lldb-dev@cs.uiuc.edu
</td>
</tr>
<tr>
<th>Reporter</th>
<td>sorrels.m@gmail.com
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>The Linux 64 bit version of lldb fails test TestCallCPPFunction.py when using a
32-bit debuggee (using the LLDB_TEST_ARGUMENTS="-A i386" flag for running the
test). The failure happens when it tries to call the function in the debuggee
called a_function_to_call().
This same kind of architure thunking appears to be broken on a few other tests
as well (TestCPPStaticMethods.py)
Here's the output of a session doing this test by hand:
(lldb) file
/data/work/llvm/llvm/tools/lldb.svn/test/lang/cpp/call-function/a.out
Current executable set to
'/data/work/llvm/llvm/tools/lldb.svn/test/lang/cpp/call-function/a.out' (i386).
(lldb) breakpoint set -l 10 main.cpp
Breakpoint 1: where = a.out`main + 3 at main.cpp:10, address = 0x08048443
(lldb) run
Process 3356 launched:
'/data/work/llvm/llvm/tools/lldb.svn/test/lang/cpp/call-function/a.out' (i386)
Process 3356 stopped
* thread #1: tid = 0x0d1c, 0x08048443 a.out`main + 3 at main.cpp:10, stop
reason = breakpoint 1.1
frame #0: 0x08048443 a.out`main + 3 at main.cpp:10
7
8 int main()
9 {
-> 10 printf("%d\n", a_function_to_call()); // breakpoint
11 }
thread list
Process 3356 stopped
* thread #1: tid = 0x0d1c, 0x08048443 a.out`main + 3 at main.cpp:10, stop
reason = breakpoint 1.1
(lldb) expression -- a_function_to_call()
error: Execution was interrupted, reason: invalid address (fault address:
0xeeef4020).
The process has been returned to the state before expression evaluation.
(lldb)</pre>
</div>
</p>
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