Fix SBValue::FindValue for file static variables

This was just a thinko. The API StackFrame::GetVariableList takes a
bool for "get_file_globals" which if true will also find file statics
and file globals. But we only were passing that as true if the
ValueType was eValueTypeVariableGlobal, which meant that we never find
file statics. It's okay if we cast too wide a net when we do
GetVariableList as later on we check against the ValueType to filter
globals from statics.

There was a test that had a whole bunch of globals and tested
FindValue on all of them, but had no statics. So I just made one of
the globals a file static, which verifies the fix.

Differential Revision: https://reviews.llvm.org/D151392

(cherry picked from commit 1418677)

Author: jimingham

lldb/source/API/SBFrame.cpp

@@ -611,7 +611,8 @@ SBValue SBFrame::FindValue(const char *name, ValueType value_type,
                 stop_if_block_is_inlined_function,
                 [frame](Variable *v) { return v->IsInScope(frame); },
                 &variable_list);
-          if (value_type == eValueTypeVariableGlobal) {
+          if (value_type == eValueTypeVariableGlobal 
+              || value_type == eValueTypeVariableStatic) {
             const bool get_file_globals = true;
             VariableList *frame_vars = frame->GetVariableList(get_file_globals,
                                                               nullptr);

lldb/test/API/python_api/process/TestProcessAPI.py

@@ -48,8 +48,8 @@ def test_read_memory(self):
         )
         frame = thread.GetFrameAtIndex(0)
 
-        # Get the SBValue for the global variable 'my_char'.
-        val = frame.FindValue("my_char", lldb.eValueTypeVariableGlobal)
+        # Get the SBValue for the file static variable 'my_char'.
+        val = frame.FindValue("my_char", lldb.eValueTypeVariableStatic)
         self.DebugSBValue(val)
 
         # Due to the typemap magic (see lldb.swig), we pass in 1 to ReadMemory and
@@ -148,8 +148,8 @@ def test_write_memory(self):
         )
         frame = thread.GetFrameAtIndex(0)
 
-        # Get the SBValue for the global variable 'my_char'.
-        val = frame.FindValue("my_char", lldb.eValueTypeVariableGlobal)
+        # Get the SBValue for the static variable 'my_char'.
+        val = frame.FindValue("my_char", lldb.eValueTypeVariableStatic)
         self.DebugSBValue(val)
 
         # If the variable does not have a load address, there's no sense

lldb/test/API/python_api/process/main.cpp

@@ -3,7 +3,7 @@
 
 // This simple program is to test the lldb Python API related to process.
 
-char my_char = 'u';
+static char my_char = 'u';
 char my_cstring[] = "lldb.SBProcess.ReadCStringFromMemory() works!";
 char *my_char_ptr = (char *)"Does it work?";
 uint32_t my_uint32 = 12345;