Add missing GoLanguageRuntime files.

llvm-svn: 249459
llvm · Oct 6, 2015 · 2b56f86 · 2b56f86
1 parent 05e9cb5
commit 2b56f86
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diff --git a/lldb/source/Plugins/LanguageRuntime/Go/CMakeLists.txt b/lldb/source/Plugins/LanguageRuntime/Go/CMakeLists.txt
@@ -0,0 +1,5 @@
+set(LLVM_NO_RTTI 1)
+
+add_lldb_library(lldbPluginLanguageRuntimeGo
+  GoLanguageRuntime.cpp
+  )
diff --git a/lldb/source/Plugins/LanguageRuntime/Go/GoLanguageRuntime.cpp b/lldb/source/Plugins/LanguageRuntime/Go/GoLanguageRuntime.cpp
@@ -0,0 +1,238 @@
+//===-- GoLanguageRuntime.cpp --------------------------------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "GoLanguageRuntime.h"
+
+#include "lldb/Breakpoint/BreakpointLocation.h"
+#include "lldb/Core/ConstString.h"
+#include "lldb/Core/Error.h"
+#include "lldb/Core/Log.h"
+#include "lldb/Core/Module.h"
+#include "lldb/Core/PluginManager.h"
+#include "lldb/Core/Scalar.h"
+#include "lldb/Core/ValueObject.h"
+#include "lldb/Core/ValueObjectMemory.h"
+#include "lldb/Symbol/GoASTContext.h"
+#include "lldb/Symbol/Symbol.h"
+#include "lldb/Symbol/TypeList.h"
+#include "lldb/Target/Process.h"
+#include "lldb/Target/RegisterContext.h"
+#include "lldb/Target/SectionLoadList.h"
+#include "lldb/Target/StopInfo.h"
+#include "lldb/Target/Target.h"
+#include "lldb/Target/Thread.h"
+#include "llvm/ADT/Twine.h"
+
+#include <vector>
+
+using namespace lldb;
+using namespace lldb_private;
+
+namespace {
+ValueObjectSP GetChild(ValueObject& obj, const char* name, bool dereference = true) {
+    ConstString name_const_str(name);
+    ValueObjectSP result = obj.GetChildMemberWithName(name_const_str, true);
+    if (dereference && result && result->IsPointerType()) {
+        Error err;
+        result = result->Dereference(err);
+        if (err.Fail())
+            result.reset();
+    }
+    return result;
+}
+
+ConstString ReadString(ValueObject& str, Process* process) {
+    ConstString result;
+    ValueObjectSP data = GetChild(str, "str", false);
+    ValueObjectSP len = GetChild(str, "len");
+    if (len && data)
+    {
+        Error err;
+        lldb::addr_t addr = data->GetPointerValue();
+        if (addr == LLDB_INVALID_ADDRESS)
+            return result;
+        uint64_t byte_size = len->GetValueAsUnsigned(0);
+        char* buf = new char[byte_size + 1];
+        buf[byte_size] = 0;
+        size_t bytes_read = process->ReadMemory (addr,
+                                                 buf,
+                                                 byte_size,
+                                                 err);
+        if (!(err.Fail() || bytes_read != byte_size))
+            result = ConstString(buf, bytes_read);
+        delete[] buf;
+    }
+    return result;
+}
+
+ConstString
+ReadTypeName(ValueObjectSP type, Process* process)
+{
+    if (ValueObjectSP uncommon = GetChild(*type, "x"))
+    {
+        ValueObjectSP name = GetChild(*uncommon, "name");
+        ValueObjectSP package = GetChild(*uncommon, "pkgpath");
+        if (name && name->GetPointerValue() != 0 && package && package->GetPointerValue() != 0)
+        {
+            ConstString package_const_str = ReadString(*package, process);
+            ConstString name_const_str = ReadString(*name, process);
+            if (package_const_str.GetLength() == 0)
+                return name_const_str;
+            return ConstString((package_const_str.GetStringRef() + "." + name_const_str.GetStringRef()).str());
+        }
+    }
+    ValueObjectSP name = GetChild(*type, "_string");
+    if (name)
+        return ReadString(*name, process);
+    return ConstString("");
+}
+
+CompilerType
+LookupRuntimeType(ValueObjectSP type, ExecutionContext* exe_ctx, bool* is_direct)
+{
+    uint8_t kind = GetChild(*type, "kind")->GetValueAsUnsigned(0);
+    *is_direct = GoASTContext::IsDirectIface(kind);
+    if (GoASTContext::IsPointerKind(kind))
+    {
+        CompilerType type_ptr = type->GetCompilerType().GetPointerType();
+        Error err;
+        ValueObjectSP elem = type->CreateValueObjectFromAddress("elem", type->GetAddressOf() + type->GetByteSize(), *exe_ctx, type_ptr)->Dereference(err);
+        if (err.Fail())
+            return CompilerType();
+        bool tmp_direct;
+        return LookupRuntimeType(elem, exe_ctx, &tmp_direct).GetPointerType();
+    }
+    Target *target = exe_ctx->GetTargetPtr();
+    Process *process = exe_ctx->GetProcessPtr();
+
+    ConstString const_typename = ReadTypeName(type, process);
+    if (const_typename.GetLength() == 0)
+        return CompilerType();
+
+    SymbolContext sc;
+    TypeList type_list;
+    uint32_t num_matches = target->GetImages().FindTypes (sc,
+                                                          const_typename,
+                                                          false,
+                                                          2,
+                                                          type_list);
+    if (num_matches > 0) {
+        return type_list.GetTypeAtIndex(0)->GetFullCompilerType();
+    }
+    return CompilerType();
+}
+
+}
+
+bool
+GoLanguageRuntime::CouldHaveDynamicValue (ValueObject &in_value)
+{
+    return GoASTContext::IsGoInterface(in_value.GetCompilerType());
+}
+
+bool
+GoLanguageRuntime::GetDynamicTypeAndAddress(ValueObject &in_value, lldb::DynamicValueType use_dynamic,
+                                            TypeAndOrName &class_type_or_name, Address &dynamic_address,
+                                            Value::ValueType &value_type)
+{
+    value_type = Value::eValueTypeScalar;
+    class_type_or_name.Clear();
+    if (CouldHaveDynamicValue (in_value))
+    {
+        Error err;
+        ValueObjectSP iface = in_value.GetStaticValue();
+        ValueObjectSP data_sp = GetChild(*iface, "data", false);
+        if (!data_sp)
+            return false;
+
+        if (ValueObjectSP tab = GetChild(*iface, "tab"))
+            iface = tab;
+        ValueObjectSP type = GetChild(*iface, "_type");
+        if (!type)
+        {
+            return false;
+        }
+
+        bool direct;
+        ExecutionContext exe_ctx (in_value.GetExecutionContextRef());
+        CompilerType final_type = LookupRuntimeType(type, &exe_ctx, &direct);
+        if (!final_type)
+            return false;
+        if (direct)
+        {
+            class_type_or_name.SetCompilerType(final_type);
+        }
+        else
+        {
+            // TODO: implement reference types or fix caller to support dynamic types that aren't pointers
+            // so we don't have to introduce this extra pointer.
+            class_type_or_name.SetCompilerType(final_type.GetPointerType());
+        }
+
+        dynamic_address.SetLoadAddress(data_sp->GetPointerValue(), exe_ctx.GetTargetPtr());
+
+        return true;
+    }
+    return false;
+}
+
+TypeAndOrName
+GoLanguageRuntime::FixUpDynamicType(const TypeAndOrName &type_and_or_name, ValueObject &static_value)
+{
+    return type_and_or_name;
+}
+
+//------------------------------------------------------------------
+// Static Functions
+//------------------------------------------------------------------
+LanguageRuntime *
+GoLanguageRuntime::CreateInstance (Process *process, lldb::LanguageType language)
+{
+    if (language == eLanguageTypeGo)
+        return new GoLanguageRuntime (process);
+    else
+        return NULL;
+}
+
+void
+GoLanguageRuntime::Initialize()
+{
+    PluginManager::RegisterPlugin (GetPluginNameStatic(),
+                                   "Go Language Runtime",
+                                   CreateInstance);
+}
+
+void
+GoLanguageRuntime::Terminate()
+{
+    PluginManager::UnregisterPlugin (CreateInstance);
+}
+
+lldb_private::ConstString
+GoLanguageRuntime::GetPluginNameStatic()
+{
+    static ConstString g_name("golang");
+    return g_name;
+}
+
+//------------------------------------------------------------------
+// PluginInterface protocol
+//------------------------------------------------------------------
+lldb_private::ConstString
+GoLanguageRuntime::GetPluginName()
+{
+    return GetPluginNameStatic();
+}
+
+uint32_t
+GoLanguageRuntime::GetPluginVersion()
+{
+    return 1;
+}
+
diff --git a/lldb/source/Plugins/LanguageRuntime/Go/GoLanguageRuntime.h b/lldb/source/Plugins/LanguageRuntime/Go/GoLanguageRuntime.h
@@ -0,0 +1,93 @@
+//===-- GoLanguageRuntime.h ----------------------------------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef liblldb_GoLanguageRuntime_h_
+#define liblldb_GoLanguageRuntime_h_
+
+// C Includes
+// C++ Includes
+// Other libraries and framework includes
+// Project includes
+#include "lldb/lldb-private.h"
+#include "lldb/Breakpoint/BreakpointResolver.h"
+#include "lldb/Target/LanguageRuntime.h"
+#include "lldb/Core/Value.h"
+
+namespace lldb_private {
+
+    class GoLanguageRuntime :
+    public lldb_private::LanguageRuntime
+    {
+    public:
+        ~GoLanguageRuntime() { }
+
+        lldb::LanguageType
+        GetLanguageType() const override
+        {
+            return lldb::eLanguageTypeGo;
+        }
+
+        bool
+        GetObjectDescription(Stream &str, ValueObject &object) override
+        {
+            // TODO(ribrdb): Maybe call String() method?
+            return false;
+        }
+
+        bool
+        GetObjectDescription(Stream &str, Value &value, ExecutionContextScope *exe_scope) override
+        {
+            return false;
+        }
+
+        bool GetDynamicTypeAndAddress(ValueObject &in_value, lldb::DynamicValueType use_dynamic,
+                                      TypeAndOrName &class_type_or_name, Address &address,
+                                      Value::ValueType &value_type) override;
+
+        bool CouldHaveDynamicValue(ValueObject &in_value) override;
+
+        lldb::BreakpointResolverSP
+        CreateExceptionResolver(Breakpoint *bkpt, bool catch_bp, bool throw_bp) override
+        {
+            return lldb::BreakpointResolverSP();
+        }
+
+        TypeAndOrName FixUpDynamicType(const TypeAndOrName &type_and_or_name, ValueObject &static_value) override;
+
+        //------------------------------------------------------------------
+        // Static Functions
+        //------------------------------------------------------------------
+        static void
+        Initialize();
+
+        static void
+        Terminate();
+
+        static lldb_private::LanguageRuntime *
+        CreateInstance (Process *process, lldb::LanguageType language);
+
+        static lldb_private::ConstString
+        GetPluginNameStatic();
+
+        //------------------------------------------------------------------
+        // PluginInterface protocol
+        //------------------------------------------------------------------
+        virtual lldb_private::ConstString
+        GetPluginName();
+
+        virtual uint32_t
+        GetPluginVersion();
+
+    private:
+        GoLanguageRuntime(Process *process) : lldb_private::LanguageRuntime(process) { } // Call CreateInstance instead.
+    };
+
+} // namespace lldb_private
+
+#endif  // liblldb_GoLanguageRuntime_h_
diff --git a/lldb/source/Plugins/LanguageRuntime/Go/Makefile b/lldb/source/Plugins/LanguageRuntime/Go/Makefile
@@ -0,0 +1,14 @@
+##===- Source/Plugins/LangRuntime/Go/Makefile ----*- Makefile -*-===##
+# 
+#                     The LLVM Compiler Infrastructure
+#
+# This file is distributed under the University of Illinois Open Source
+# License. See LICENSE.TXT for details.
+# 
+##===----------------------------------------------------------------------===##
+
+LLDB_LEVEL := ../../../..
+LIBRARYNAME := lldbPluginLanguageRuntimeGo
+BUILD_ARCHIVE = 1
+
+include $(LLDB_LEVEL)/Makefile