[Lldb-commits] [lldb] e30c493 - [lldb] Support non-pointer implicit this/self in GetValueForVariableExpressionPath
Dave Lee via lldb-commits
lldb-commits at lists.llvm.org
Wed Jun 15 22:05:12 PDT 2022
Author: Dave Lee
Date: 2022-06-15T22:04:02-07:00
New Revision: e30c493894c410825ad7467f4996aca7f613ce81
URL: https://github.com/llvm/llvm-project/commit/e30c493894c410825ad7467f4996aca7f613ce81
DIFF: https://github.com/llvm/llvm-project/commit/e30c493894c410825ad7467f4996aca7f613ce81.diff
LOG: [lldb] Support non-pointer implicit this/self in GetValueForVariableExpressionPath
The `frame variable` command supports an implicit `this`/`self`, allowing a
user to run `v some_field` instead of `v this->some_field`. However, some
languages have non-pointer `this`/`self` types (for example, Swift).
This change adds support for non-pointer implicit `this`/`self`. This is done
by consulting the type of the instance variable. If the type is known to be
non-pointer, the dot operator is used instead of the arrow operator.
The C language of families each have a pointer instance type, which makes
testing of this difficult. Tests for this feature will be done in the Swift
downstream fork, as Swift's `self` is a non-pointer (reference) type.
rdar://82095148
Reviewed By: aprantl
Differential Revision: https://reviews.llvm.org/D127605
Added:
Modified:
lldb/source/Target/StackFrame.cpp
Removed:
################################################################################
diff --git a/lldb/source/Target/StackFrame.cpp b/lldb/source/Target/StackFrame.cpp
index 0cac769018389..a5cb5753a9b1e 100644
--- a/lldb/source/Target/StackFrame.cpp
+++ b/lldb/source/Target/StackFrame.cpp
@@ -552,7 +552,7 @@ ValueObjectSP StackFrame::GetValueForVariableExpressionPath(
if (!var_sp && (options & eExpressionPathOptionsAllowDirectIVarAccess)) {
// Check for direct ivars access which helps us with implicit access to
- // ivars with the "this->" or "self->"
+ // ivars using "this" or "self".
GetSymbolContext(eSymbolContextFunction | eSymbolContextBlock);
lldb::LanguageType method_language = eLanguageTypeUnknown;
bool is_instance_method = false;
@@ -563,7 +563,13 @@ ValueObjectSP StackFrame::GetValueForVariableExpressionPath(
var_sp = variable_list->FindVariable(method_object_name);
if (var_sp) {
separator_idx = 0;
- var_expr_storage = "->";
+ if (Type *var_type = var_sp->GetType())
+ if (auto compiler_type = var_type->GetForwardCompilerType())
+ if (!compiler_type.IsPointerType())
+ var_expr_storage = ".";
+
+ if (var_expr_storage.empty())
+ var_expr_storage = "->";
var_expr_storage += var_expr;
var_expr = var_expr_storage;
synthetically_added_instance_object = true;
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