[Lldb-commits] [lldb] [lldb][Test] Add C++ tests for DumpValueObjectOptions and enums (PR #93158)

[David Spickett via lldb-commits]

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@@ -0,0 +1,136 @@
+//===-- DumpValueObjectOptionsTests.cpp -----------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "Plugins/Platform/Linux/PlatformLinux.h"
+#include "Plugins/ScriptInterpreter/None/ScriptInterpreterNone.h"
+#include "Plugins/TypeSystem/Clang/TypeSystemClang.h"
+#include "TestingSupport/SubsystemRAII.h"
+#include "TestingSupport/Symbol/ClangTestUtils.h"
+#include "lldb/Core/Debugger.h"
+#include "lldb/Core/ValueObject.h"
+#include "lldb/Core/ValueObjectConstResult.h"
+#include "lldb/DataFormatters/DumpValueObjectOptions.h"
+
+#include "gtest/gtest.h"
+
+using namespace lldb;
+using namespace lldb_private;
+
+struct MockProcess : Process {
+  MockProcess(lldb::TargetSP target_sp, lldb::ListenerSP listener_sp)
+      : Process(target_sp, listener_sp) {}
+
+  llvm::StringRef GetPluginName() override { return "mock process"; }
+
+  bool CanDebug(lldb::TargetSP target, bool plugin_specified_by_name) override {
+    return false;
+  };
+
+  Status DoDestroy() override { return {}; }
+
+  void RefreshStateAfterStop() override {}
+
+  bool DoUpdateThreadList(ThreadList &old_thread_list,
+                          ThreadList &new_thread_list) override {
+    return false;
+  };
+
+  size_t DoReadMemory(lldb::addr_t vm_addr, void *buf, size_t size,
+                      Status &error) override {
+    // No need to read memory in these tests.
+    return size;
+  }
+};
+
+class ValueObjectMockProcessTest : public ::testing::Test {
+public:
+  void SetUp() override {
+    ArchSpec arch("i386-pc-linux");
+    Platform::SetHostPlatform(
+        platform_linux::PlatformLinux::CreateInstance(true, &arch));
+    m_debugger_sp = Debugger::CreateInstance();
+    ASSERT_TRUE(m_debugger_sp);
+    m_debugger_sp->GetTargetList().CreateTarget(*m_debugger_sp, "", arch,
+                                                eLoadDependentsNo,
+                                                m_platform_sp, m_target_sp);
+    ASSERT_TRUE(m_target_sp);
+    ASSERT_TRUE(m_target_sp->GetArchitecture().IsValid());
+    ASSERT_TRUE(m_platform_sp);
+    m_listener_sp = Listener::MakeListener("dummy");
+    m_process_sp = std::make_shared<MockProcess>(m_target_sp, m_listener_sp);
+    ASSERT_TRUE(m_process_sp);
+    m_exe_ctx = ExecutionContext(m_process_sp);
+
+    m_holder = std::make_unique<clang_utils::TypeSystemClangHolder>("test");
+    m_type_system = m_holder->GetAST();
+  }
+
+  ExecutionContext m_exe_ctx;
+  TypeSystemClang *m_type_system;
+
+private:
+  SubsystemRAII<FileSystem, HostInfo, platform_linux::PlatformLinux,
+                ScriptInterpreterNone>
+      m_subsystems;
+
+  std::unique_ptr<clang_utils::TypeSystemClangHolder> m_holder;
+  lldb::DebuggerSP m_debugger_sp;
+  lldb::TargetSP m_target_sp;
+  lldb::PlatformSP m_platform_sp;
+  lldb::ListenerSP m_listener_sp;
+  lldb::ProcessSP m_process_sp;
+};
+
+TEST_F(ValueObjectMockProcessTest, Enum) {
+  CompilerType uint_type = m_type_system->GetBuiltinTypeForEncodingAndBitSize(
+      lldb::eEncodingUint, 32);
+  CompilerType enum_type = m_type_system->CreateEnumerationType(
+      "test_enum", m_type_system->GetTranslationUnitDecl(),
+      OptionalClangModuleID(), Declaration(), uint_type, false);
+
+  m_type_system->StartTagDeclarationDefinition(enum_type);
+  Declaration decl;
+  // Each value sets one bit in the enum, to make this a "bitfield like enum".
+  m_type_system->AddEnumerationValueToEnumerationType(enum_type, decl, "test_2",
+                                                      2, 32);
+  m_type_system->AddEnumerationValueToEnumerationType(enum_type, decl, "test_4",
+                                                      4, 32);
+  m_type_system->CompleteTagDeclarationDefinition(enum_type);
+
+  std::vector<std::tuple<uint32_t, DumpValueObjectOptions, const char *>> enums{
+      {0, {}, "(test_enum) test_var =\n"},
----------------
DavidSpickett wrote:

I'm looking into why this one prints no value at all, but I'm not trying to change any behaviour in this patch, just document what exists.

https://github.com/llvm/llvm-project/pull/93158