vsk updated this revision to Diff 136450.
vsk added a comment.
> The problem with your RETURN_IF_UNEXPECTED macro is that it make it
> impossible to put a breakpoint only on the "type was invalid case." To catch
> that happening while debugging you'd have to write a conditional breakpoint
> that also checks the error.
Yes, we'd need a conditional breakpoint if more than one InvalidTypeError
instance is created (otherwise we'd just break on the constructor). While I
hope we never have to deal with that, I'm happy to keep things more explicit
for now.
https://reviews.llvm.org/D43912
Files:
include/lldb/Symbol/CompilerType.h
source/Plugins/ExpressionParser/Clang/ClangExpressionDeclMap.cpp
source/Plugins/ExpressionParser/Clang/ClangExpressionDeclMap.h
source/Symbol/CompilerType.cpp
Index: source/Symbol/CompilerType.cpp
===================================================================
--- source/Symbol/CompilerType.cpp
+++ source/Symbol/CompilerType.cpp
@@ -1080,3 +1080,5 @@
return lhs.GetTypeSystem() != rhs.GetTypeSystem() ||
lhs.GetOpaqueQualType() != rhs.GetOpaqueQualType();
}
+
+char lldb_private::InvalidTypeError::ID;
Index: source/Plugins/ExpressionParser/Clang/ClangExpressionDeclMap.h
===================================================================
--- source/Plugins/ExpressionParser/Clang/ClangExpressionDeclMap.h
+++ source/Plugins/ExpressionParser/Clang/ClangExpressionDeclMap.h
@@ -625,10 +625,11 @@
/// The type as it appears in the source context.
///
/// @return
- /// Returns the moved type, or an empty type if there was a problem.
+ /// Returns the moved type, or an error.
//------------------------------------------------------------------
- TypeFromUser DeportType(ClangASTContext &target, ClangASTContext &source,
- TypeFromParser parser_type);
+ llvm::Expected<TypeFromUser> DeportType(ClangASTContext &target,
+ ClangASTContext &source,
+ TypeFromParser parser_type);
ClangASTContext *GetClangASTContext();
};
Index: source/Plugins/ExpressionParser/Clang/ClangExpressionDeclMap.cpp
===================================================================
--- source/Plugins/ExpressionParser/Clang/ClangExpressionDeclMap.cpp
+++ source/Plugins/ExpressionParser/Clang/ClangExpressionDeclMap.cpp
@@ -277,9 +277,10 @@
return ret;
}
-TypeFromUser ClangExpressionDeclMap::DeportType(ClangASTContext &target,
- ClangASTContext &source,
- TypeFromParser parser_type) {
+llvm::Expected<TypeFromUser>
+ClangExpressionDeclMap::DeportType(ClangASTContext &target,
+ ClangASTContext &source,
+ TypeFromParser parser_type) {
assert (&target == m_target->GetScratchClangASTContext());
assert ((TypeSystem*)&source == parser_type.GetTypeSystem());
assert (source.getASTContext() == m_ast_context);
@@ -302,10 +303,10 @@
source_file,
clang::QualType::getFromOpaquePtr(parser_type.GetOpaqueQualType()));
return TypeFromUser(exported_type.getAsOpaquePtr(), &target);
- } else {
- lldbassert(0 && "No mechanism for deporting a type!");
- return TypeFromUser();
}
+
+ lldbassert(0 && "No mechanism for deporting a type!");
+ return llvm::make_error<InvalidTypeError>("Could not deport type");
}
bool ClangExpressionDeclMap::AddPersistentVariable(const NamedDecl *decl,
@@ -315,6 +316,7 @@
bool is_lvalue) {
assert(m_parser_vars.get());
+ Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS));
ClangASTContext *ast =
llvm::dyn_cast_or_null<ClangASTContext>(parser_type.GetTypeSystem());
if (ast == nullptr)
@@ -328,8 +330,15 @@
if (target == nullptr)
return false;
- TypeFromUser user_type =
+ llvm::Expected<TypeFromUser> user_type_or_err =
DeportType(*target->GetScratchClangASTContext(), *ast, parser_type);
+ if (!user_type_or_err) {
+ LLDB_LOG_ERROR(log, user_type_or_err.takeError(), "{0}");
+ return false;
+ }
+ TypeFromUser &user_type = *user_type_or_err;
+ assert(user_type.IsValid() &&
+ "Persistent variable's type wasn't copied successfully");
uint32_t offset = m_parser_vars->m_materializer->AddResultVariable(
user_type, is_lvalue, m_keep_result_in_memory, m_result_delegate, err);
@@ -358,21 +367,22 @@
return true;
}
- Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS));
ExecutionContext &exe_ctx = m_parser_vars->m_exe_ctx;
Target *target = exe_ctx.GetTargetPtr();
if (target == NULL)
return false;
ClangASTContext *context(target->GetScratchClangASTContext());
- TypeFromUser user_type = DeportType(*context, *ast, parser_type);
-
- if (!user_type.GetOpaqueQualType()) {
- if (log)
- log->Printf("Persistent variable's type wasn't copied successfully");
+ llvm::Expected<TypeFromUser> user_type_or_err =
+ DeportType(*context, *ast, parser_type);
+ if (!user_type_or_err) {
+ LLDB_LOG_ERROR(log, user_type_or_err.takeError(), "{0}");
return false;
}
+ TypeFromUser &user_type = *user_type_or_err;
+ assert(user_type.IsValid() &&
+ "Persistent variable's type wasn't copied successfully");
if (!m_parser_vars->m_target_info.IsValid())
return false;
Index: include/lldb/Symbol/CompilerType.h
===================================================================
--- include/lldb/Symbol/CompilerType.h
+++ include/lldb/Symbol/CompilerType.h
@@ -21,6 +21,7 @@
#include "lldb/Core/ClangForward.h"
#include "lldb/lldb-private.h"
#include "llvm/ADT/APSInt.h"
+#include "llvm/Support/Error.h"
namespace lldb_private {
@@ -441,6 +442,23 @@
CompilerType type;
};
+/// A force-checked error used to describe type construction failures.
+class InvalidTypeError : public llvm::ErrorInfo<InvalidTypeError> {
+public:
+ static char ID;
+ std::string Reason;
+
+ InvalidTypeError(llvm::StringRef Reason) : Reason(Reason) {}
+
+ void log(llvm::raw_ostream &OS) const override {
+ OS << "Invalid type: " << Reason;
+ }
+
+ std::error_code convertToErrorCode() const override {
+ return std::make_error_code(std::errc::invalid_argument);
+ }
+};
+
} // namespace lldb_private
#endif // liblldb_CompilerType_h_
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