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<base href="https://bugs.llvm.org/">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - lldb can not print anonymous structs anymore"
href="https://bugs.llvm.org/show_bug.cgi?id=43599">43599</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>lldb can not print anonymous structs anymore
</td>
</tr>
<tr>
<th>Product</th>
<td>lldb
</td>
</tr>
<tr>
<th>Version</th>
<td>9.0
</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@lists.llvm.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>nat-llvmbugs@mulle-kybernetik.com
</td>
</tr>
<tr>
<th>CC</th>
<td>jdevlieghere@apple.com, llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=22641" name="attach_22641" title="Sourcecode">attachment 22641</a> <a href="attachment.cgi?id=22641&action=edit" title="Sourcecode">[details]</a></span>
Sourcecode
Build with `clang -o foo -g -O0 foo.c.`
Then load foo into lldb and set a breakpoint on main.
Execute until printf. Now say `p x`.
You'll get ((anonymous struct)) $0 = {}
Here's some log output
lldb FindExternalLexicalDecls[2] on (ASTContext*)0x13f1120 in ''
(CXXRecordDecl*)0x1430e48
lldb FELD[2] Original decl (ASTContext*)0x7f9b98005b20
(Decl*)0x7f9b98047638:
lldb struct {
lldb int x;
lldb int y;
lldb }
lldb FELD[2] Adding [to CXXRecordDecl ] lexical FieldDecl int x
lldb FELD[2] Adding [to CXXRecordDecl ] lexical FieldDecl int y
lldb LayoutRecordType[3] on (ASTContext*)0x13f1120 for
(RecordDecl*)0x1430e48 [name = '']
lldb LRT[3] returned:
lldb LRT[3] Original = (RecordDecl*)0x7f9b98047638
lldb LRT[3] Size = 64
lldb LRT[3] Alignment = 32
lldb LRT[3] Fields:
lldb LRT[3] Bases:
lldb EntityVariable::Dematerialize [address = 0x7ffff7fcc008,
m_variable_sp = x]
lldb == [UserExpression::Evaluate] Execution completed normally
with result (null) ==
lldb IRMemoryMap::Free (0x7ffff7d17000) freed
[0x7ffff7d17000..0x7ffff7d97007)
lldb IRMemoryMap::Free (0x7ffff7fcc000) freed
[0x7ffff7fcc000..0x7ffff7fcc017)
((anonymous struct)) $1 = {}
Its puzzling, because you can see the expr is actually completing the
record_decl correctly. Bbut then llvm throws the result away in
IRForTarget::CreateResultVariable I believe, by asking the Parser, who returns
an incomplete RecordDecl ?
304 } else {
305 m_result_type = lldb_private::TypeFromParser(
306 result_var->getType().getAsOpaquePtr(),
307 lldb_private::ClangASTContext::GetASTContext(
308 &result_decl->getASTContext()));
309 }
The same procedure works fine with 8.0.0.</pre>
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