forked from OSchip/llvm-project
[lldb][NFC] Move searching for $__lldb_objc_class into its own function
Same as in commit e7cc833dda but with $__lldb_objc_class.
This commit is contained in:
Raphael Isemann
parent
6778a62eb0
commit
51ad025ff3
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@ -938,6 +938,141 @@ void ClangExpressionDeclMap::LookUpLldbClass(NameSearchContext &context,
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}
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}
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void ClangExpressionDeclMap::LookUpLldbObjCClass(NameSearchContext &context,
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unsigned int current_id) {
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Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS));
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StackFrame *frame = m_parser_vars->m_exe_ctx.GetFramePtr();
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if (m_ctx_obj) {
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Status status;
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lldb::ValueObjectSP ctx_obj_ptr = m_ctx_obj->AddressOf(status);
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if (!ctx_obj_ptr || status.Fail())
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return;
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AddOneType(context, TypeFromUser(m_ctx_obj->GetCompilerType()), current_id);
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m_struct_vars->m_object_pointer_type =
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TypeFromUser(ctx_obj_ptr->GetCompilerType());
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return;
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}
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// Clang is looking for the type of "*self"
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if (!frame)
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return;
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SymbolContext sym_ctx = frame->GetSymbolContext(lldb::eSymbolContextFunction |
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lldb::eSymbolContextBlock);
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// Find the block that defines the function represented by "sym_ctx"
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Block *function_block = sym_ctx.GetFunctionBlock();
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if (!function_block)
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return;
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CompilerDeclContext function_decl_ctx = function_block->GetDeclContext();
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if (!function_decl_ctx)
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return;
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clang::ObjCMethodDecl *method_decl =
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ClangASTContext::DeclContextGetAsObjCMethodDecl(function_decl_ctx);
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if (method_decl) {
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ObjCInterfaceDecl *self_interface = method_decl->getClassInterface();
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if (!self_interface)
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return;
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const clang::Type *interface_type = self_interface->getTypeForDecl();
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if (!interface_type)
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return; // This is unlikely, but we have seen crashes where this
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// occurred
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TypeFromUser class_user_type(
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QualType(interface_type, 0).getAsOpaquePtr(),
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ClangASTContext::GetASTContext(&method_decl->getASTContext()));
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if (log) {
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ASTDumper ast_dumper(interface_type);
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LLDB_LOGF(log, " FEVD[%u] Adding type for $__lldb_objc_class: %s",
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current_id, ast_dumper.GetCString());
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}
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AddOneType(context, class_user_type, current_id);
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if (method_decl->isInstanceMethod()) {
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// self is a pointer to the object
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QualType class_pointer_type =
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method_decl->getASTContext().getObjCObjectPointerType(
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QualType(interface_type, 0));
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TypeFromUser self_user_type(
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class_pointer_type.getAsOpaquePtr(),
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ClangASTContext::GetASTContext(&method_decl->getASTContext()));
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m_struct_vars->m_object_pointer_type = self_user_type;
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} else {
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// self is a Class pointer
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QualType class_type = method_decl->getASTContext().getObjCClassType();
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TypeFromUser self_user_type(
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class_type.getAsOpaquePtr(),
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ClangASTContext::GetASTContext(&method_decl->getASTContext()));
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m_struct_vars->m_object_pointer_type = self_user_type;
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}
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return;
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}
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// This branch will get hit if we are executing code in the context of
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// a function that claims to have an object pointer (through
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// DW_AT_object_pointer?) but is not formally a method of the class.
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// In that case, just look up the "self" variable in the current scope
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// and use its type.
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VariableList *vars = frame->GetVariableList(false);
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lldb::VariableSP self_var = vars->FindVariable(ConstString("self"));
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if (self_var && self_var->IsInScope(frame) &&
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self_var->LocationIsValidForFrame(frame)) {
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Type *self_type = self_var->GetType();
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if (!self_type)
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return;
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CompilerType self_clang_type = self_type->GetFullCompilerType();
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if (ClangASTContext::IsObjCClassType(self_clang_type)) {
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return;
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} else if (ClangASTContext::IsObjCObjectPointerType(self_clang_type)) {
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self_clang_type = self_clang_type.GetPointeeType();
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if (!self_clang_type)
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return;
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if (log) {
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ASTDumper ast_dumper(self_type->GetFullCompilerType());
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LLDB_LOGF(log, " FEVD[%u] Adding type for $__lldb_objc_class: %s",
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current_id, ast_dumper.GetCString());
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}
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TypeFromUser class_user_type(self_clang_type);
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AddOneType(context, class_user_type, current_id);
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TypeFromUser self_user_type(self_type->GetFullCompilerType());
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m_struct_vars->m_object_pointer_type = self_user_type;
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}
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}
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}
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void ClangExpressionDeclMap::FindExternalVisibleDecls(
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NameSearchContext &context, lldb::ModuleSP module_sp,
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CompilerDeclContext &namespace_decl, unsigned int current_id) {
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@ -974,142 +1109,9 @@ void ClangExpressionDeclMap::FindExternalVisibleDecls(
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static ConstString g_lldb_objc_class_name("$__lldb_objc_class");
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if (name == g_lldb_objc_class_name) {
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if (m_ctx_obj) {
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Status status;
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lldb::ValueObjectSP ctx_obj_ptr = m_ctx_obj->AddressOf(status);
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if (!ctx_obj_ptr || status.Fail())
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return;
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AddOneType(context, TypeFromUser(m_ctx_obj->GetCompilerType()),
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current_id);
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m_struct_vars->m_object_pointer_type =
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TypeFromUser(ctx_obj_ptr->GetCompilerType());
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return;
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}
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// Clang is looking for the type of "*self"
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if (!frame)
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return;
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SymbolContext sym_ctx = frame->GetSymbolContext(
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lldb::eSymbolContextFunction | lldb::eSymbolContextBlock);
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// Find the block that defines the function represented by "sym_ctx"
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Block *function_block = sym_ctx.GetFunctionBlock();
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if (!function_block)
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return;
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CompilerDeclContext function_decl_ctx = function_block->GetDeclContext();
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if (!function_decl_ctx)
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return;
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clang::ObjCMethodDecl *method_decl =
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ClangASTContext::DeclContextGetAsObjCMethodDecl(function_decl_ctx);
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if (method_decl) {
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ObjCInterfaceDecl *self_interface = method_decl->getClassInterface();
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if (!self_interface)
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return;
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const clang::Type *interface_type = self_interface->getTypeForDecl();
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if (!interface_type)
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return; // This is unlikely, but we have seen crashes where this
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// occurred
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TypeFromUser class_user_type(
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QualType(interface_type, 0).getAsOpaquePtr(),
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ClangASTContext::GetASTContext(&method_decl->getASTContext()));
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if (log) {
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ASTDumper ast_dumper(interface_type);
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LLDB_LOGF(log, " FEVD[%u] Adding type for $__lldb_objc_class: %s",
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current_id, ast_dumper.GetCString());
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}
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AddOneType(context, class_user_type, current_id);
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if (method_decl->isInstanceMethod()) {
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// self is a pointer to the object
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QualType class_pointer_type =
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method_decl->getASTContext().getObjCObjectPointerType(
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QualType(interface_type, 0));
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TypeFromUser self_user_type(
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class_pointer_type.getAsOpaquePtr(),
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ClangASTContext::GetASTContext(&method_decl->getASTContext()));
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m_struct_vars->m_object_pointer_type = self_user_type;
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} else {
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// self is a Class pointer
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QualType class_type = method_decl->getASTContext().getObjCClassType();
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TypeFromUser self_user_type(
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class_type.getAsOpaquePtr(),
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ClangASTContext::GetASTContext(&method_decl->getASTContext()));
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m_struct_vars->m_object_pointer_type = self_user_type;
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}
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return;
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} else {
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// This branch will get hit if we are executing code in the context of
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// a function that claims to have an object pointer (through
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// DW_AT_object_pointer?) but is not formally a method of the class.
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// In that case, just look up the "self" variable in the current scope
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// and use its type.
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VariableList *vars = frame->GetVariableList(false);
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lldb::VariableSP self_var = vars->FindVariable(ConstString("self"));
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if (self_var && self_var->IsInScope(frame) &&
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self_var->LocationIsValidForFrame(frame)) {
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Type *self_type = self_var->GetType();
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if (!self_type)
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return;
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CompilerType self_clang_type = self_type->GetFullCompilerType();
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if (ClangASTContext::IsObjCClassType(self_clang_type)) {
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return;
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} else if (ClangASTContext::IsObjCObjectPointerType(
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self_clang_type)) {
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self_clang_type = self_clang_type.GetPointeeType();
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if (!self_clang_type)
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return;
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if (log) {
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ASTDumper ast_dumper(self_type->GetFullCompilerType());
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LLDB_LOGF(log,
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" FEVD[%u] Adding type for $__lldb_objc_class: %s",
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current_id, ast_dumper.GetCString());
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}
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TypeFromUser class_user_type(self_clang_type);
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AddOneType(context, class_user_type, current_id);
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TypeFromUser self_user_type(self_type->GetFullCompilerType());
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m_struct_vars->m_object_pointer_type = self_user_type;
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return;
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}
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}
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}
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LookUpLldbObjCClass(context, current_id);
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return;
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}
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if (name == ConstString(g_lldb_local_vars_namespace_cstr)) {
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CompilerDeclContext frame_decl_context =
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sym_ctx.block != nullptr ? sym_ctx.block->GetDeclContext()
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@ -400,6 +400,16 @@ private:
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/// for logging purposes.
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void LookUpLldbClass(NameSearchContext &context, unsigned int current_id);
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/// Handles looking up $__lldb_objc_class which requires special treatment.
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///
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/// \param[in] context
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/// The NameSearchContext that can construct Decls for this name.
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///
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/// \param[in] current_id
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/// The ID for the current FindExternalVisibleDecls invocation,
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/// for logging purposes.
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void LookUpLldbObjCClass(NameSearchContext &context, unsigned int current_id);
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/// Given a target, find a variable that matches the given name and type.
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///
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/// \param[in] target
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