Always look for the top-level RBasic in LLDB scripts

`rp` and other commands were broken for me because they always showed
the object as a T_NONE.

The reason was that instead of returning the type `struct RBasic`,
FindFirstType("struct RBasic") was returning
`yjit::cruby::autogened::RBasic`.

Explicitly asking for the top-level RBasic by prefixing it with `::` is
enough to fix those commands.

Author: etiennebarrie

misc/lldb_cruby.py

@@ -68,7 +68,7 @@ def vm_frame_magic(self, cfp):
         return self.VM_FRAME_MAGIC_NAME.get(frame_type, "(none)")
 
     def rb_iseq_path_str(self, iseq):
-        tRBasic = self.target.FindFirstType("struct RBasic").GetPointerType()
+        tRBasic = self.target.FindFirstType("::RBasic").GetPointerType()
 
         pathobj = iseq.GetValueForExpressionPath("->body->location.pathobj")
         pathobj = pathobj.Cast(tRBasic)
@@ -270,7 +270,7 @@ def lldb_inspect(debugger, target, result, val):
     elif num & RUBY_IMMEDIATE_MASK:
         print('immediate(%x)' % num, file=result)
     else:
-        tRBasic = target.FindFirstType("struct RBasic").GetPointerType()
+        tRBasic = target.FindFirstType("::RBasic").GetPointerType()
 
         val = val.Cast(tRBasic)
         flags = val.GetValueForExpressionPath("->flags").GetValueAsUnsigned()
@@ -550,7 +550,7 @@ def __init__(self, page, target):
         self.num_slots = page.GetChildMemberWithName('total_slots').unsigned
         self.slot_size = page.GetChildMemberWithName('heap').GetChildMemberWithName('slot_size').unsigned
         self.counter = 0
-        self.tRBasic = target.FindFirstType("struct RBasic")
+        self.tRBasic = target.FindFirstType("::RBasic")
 
     def is_valid(self):
         heap_page_header_size = self.target.FindFirstType("struct heap_page_header").GetByteSize()

misc/lldb_rb/commands/print_flags_command.py

@@ -11,7 +11,7 @@ class PrintFlagsCommand(RbBaseCommand):
 
     # call is where our command logic will be implemented
     def call(self, debugger, command, exe_ctx, result):
-        rclass_t = self.target.FindFirstType("struct RBasic")
+        rclass_t = self.target.FindFirstType("::RBasic")
         rcass_ptr = self.target.EvaluateExpression(command).Cast(rclass_t.GetPointerType())
         obj_flags = rcass_ptr.GetValueForExpressionPath("->flags").GetValueAsUnsigned()
 

misc/lldb_rb/rb_heap_structs.py

@@ -51,7 +51,7 @@ def __init__(self, ptr, debugger, ruby_globals):
         self.flUser9 = self.ruby_globals["RUBY_FL_USER9"]
         self.flUshift = self.ruby_globals["RUBY_FL_USHIFT"]
 
-        self.tRBasic = self.target.FindFirstType("struct RBasic").GetPointerType()
+        self.tRBasic = self.target.FindFirstType("::RBasic").GetPointerType()
 
         self.val = ptr.Cast(self.tRBasic)
         self.page = HeapPage(self.debugger, self.val)