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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 confuses multiple global variables with the same name (even when they are in different namespace)"
href="https://bugs.llvm.org/show_bug.cgi?id=52582">52582</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>LLDB confuses multiple global variables with the same name (even when they are in different namespace)
</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>
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<th>OS</th>
<td>All
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>enhancement
</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>vyng@google.com
</td>
</tr>
<tr>
<th>CC</th>
<td>jdevlieghere@apple.com, llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
<div>
<pre>Background
Our binary has multiple global variables with the same basename but in
different namespaces. (Eg., lld::macho::symtab vs lld::elf::symtab,
lld::macho::in vs lld::elf::in, ...)
Repro:
Run the LLD linker under LLDB: (best to use MachO port to demonstrate this
bug):
lldb -- ld64.lld.darwninnew <... rest of args>
Set a breakpoint anywhere - but for best effect, here:
<a href="https://github.com/llvm/llvm-project/blob/2782cb8da0b3c180fa7c8627cb255a026f3d25a2/lld/MachO/Driver.cpp#L1141">https://github.com/llvm/llvm-project/blob/2782cb8da0b3c180fa7c8627cb255a026f3d25a2/lld/MachO/Driver.cpp#L1141</a>
(ie., right after `symtab` is set)
Try and print `symtab` or `in.got`:
```
(lldb) b Driver.cpp:1139
Breakpoint 1: 3 locations.
(lldb) run
Process 13244 launched:
'/Users/vyng/repo/llvm-project/build_lld/bin/ld64.lld.darwinnew' (x86_64)
Process 13244 stopped
* thread #1, queue = 'com.apple.main-thread', stop reason = breakpoint 1.2
frame #0: 0x0000000100a0856f
ld64.lld.darwinnew`lld::macho::link(argsArr=ArrayRef<const char *> @
0x00007ff7bfefeeb0, canExitEarly=true, stdoutOS=0x00000001093b83a8,
stderrOS=0x00000001093b8410) at Driver.cpp:1139:12
1136
1137 config = make<Configuration>();
1138 symtab = make<SymbolTable>();
-> 1139 target = createTargetInfo(args);
1140 depTracker =
1141
make<DependencyTracker>(args.getLastArgValue(OPT_dependency_info));
1142 if (errorCount())
Target 0: (ld64.lld.darwinnew) stopped.
(lldb) print symtab
(lld::elf::SymbolTable *) $0 = nullptr
(lldb) print in.got
(lld::elf::GotSection *) $1 = nullptr
(lldb) print lld::macho::in.got
```
Expected:
Since the code that the breakpoint stopped on referred to the variable as
simply `symtab`, I would have expected LLDB's print to allow me to also use
`symtab`.
What actually happened:
LLDB always picked the globals from lld::elf .
(presumably because it's alphabetically before ::macho)
-------------
(Tested this with GDB and it didn't have this issue)</pre>
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