https://llvm.org/bugs/show_bug.cgi?id=24198
Bug ID: 24198
Summary: template enum parameter incorrectly mangled during
expression evaluation
Product: lldb
Version: 3.6
Hardware: Macintosh
OS: MacOS X
Status: NEW
Severity: normal
Priority: P
Component: All Bugs
Assignee: lldb-dev@cs.uiuc.edu
Reporter: erik.olofs...@hansoft.se
Classification: Unclassified
The following code:
enum ETest
{
ETest_1 = 1
};
template <ETest t_Value>
struct TCTest
{
static ETest ms_Value;
};
template <ETest t_Value>
ETest TCTest<t_Value>::ms_Value = t_Value;
int main()
{
TCTest<ETest_1> ToTest;
&TCTest<ETest_1>::ms_Value;
return 0;
}
Compiled with:
clang++ -O0 -g Test.cpp
Debugged:
(lldb) target create "a.out"
Current executable set to 'a.out' (x86_64).
(lldb) break set -l 16
Breakpoint 1: where = a.out`main + 13 at Test.cpp:19, address =
0x0000000100000f9d
(lldb) run
Process 60361 launched: '/Source/LLDBBugs/a.out' (x86_64)
Process 60361 stopped
* thread #1: tid = 0x8ec778, 0x0000000100000f9d a.out`main + 13 at Test.cpp:19,
queue = 'com.apple.main-thread', stop reason = breakpoint 1.1
frame #0: 0x0000000100000f9d a.out`main + 13 at Test.cpp:19
16 {
17 TCTest<ETest_1> ToTest;
18 &TCTest<ETest_1>::ms_Value;
-> 19 return 0;
20 }
(lldb) expr ToTest.ms_Value
Internal error [IRForTarget]: Couldn't rewrite external variable
_ZN6TCTestI5ETestE8ms_ValueE
error: 0 errors parsing expression
error: The expression could not be prepared to run in the target
It seems that the enum template parameter is the problem. It should be looking
for
_ZN6TCTestIL5ETest1EE8ms_ValueE
but is looking for:
_ZN6TCTestI5ETestE8ms_ValueE
If you change the template parameter to be an int instead of an enum type it
works.
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