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//===-- AppleObjCRuntimeV2.cpp --------------------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "AppleObjCRuntimeV2.h"
#include "AppleObjCTrampolineHandler.h"
#include "llvm/Support/MachO.h"
#include "clang/AST/Type.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/StreamString.h"
#include "lldb/Expression/ClangFunction.h"
#include "lldb/Expression/ClangUtilityFunction.h"
#include "lldb/Symbol/ClangASTContext.h"
#include "lldb/Target/ExecutionContext.h"
#include "lldb/Target/Process.h"
#include "lldb/Target/RegisterContext.h"
#include "lldb/Target/StopInfo.h"
#include "lldb/Target/Target.h"
#include "lldb/Target/Thread.h"
#include <vector>
using namespace lldb;
using namespace lldb_private;
static const char *pluginName = "AppleObjCRuntimeV2";
static const char *pluginDesc = "Apple Objective C Language Runtime - Version 2";
static const char *pluginShort = "language.apple.objc.v2";
AppleObjCRuntimeV2::AppleObjCRuntimeV2 (Process *process, ModuleSP &objc_module_sp) :
lldb_private::AppleObjCRuntime (process)
{
m_has_object_getClass = (objc_module_sp->FindFirstSymbolWithNameAndType(ConstString("gdb_object_getClass")) != NULL);
}
bool
AppleObjCRuntimeV2::GetDynamicValue (ValueObject &in_value, lldb::TypeSP &type_sp, Address &address)
{
return false;
}
//------------------------------------------------------------------
// Static Functions
//------------------------------------------------------------------
lldb_private::LanguageRuntime *
AppleObjCRuntimeV2::CreateInstance (Process *process, lldb::LanguageType language)
{
// FIXME: This should be a MacOS or iOS process, and we need to look for the OBJC section to make
// sure we aren't using the V1 runtime.
if (language == eLanguageTypeObjC)
{
ModuleSP objc_module_sp;
if (AppleObjCRuntime::GetObjCVersion (process, objc_module_sp) == eAppleObjC_V2)
return new AppleObjCRuntimeV2 (process, objc_module_sp);
else
return NULL;
}
else
return NULL;
}
void
AppleObjCRuntimeV2::Initialize()
{
PluginManager::RegisterPlugin (pluginName,
pluginDesc,
CreateInstance);
}
void
AppleObjCRuntimeV2::Terminate()
{
PluginManager::UnregisterPlugin (CreateInstance);
}
//------------------------------------------------------------------
// PluginInterface protocol
//------------------------------------------------------------------
const char *
AppleObjCRuntimeV2::GetPluginName()
{
return pluginName;
}
const char *
AppleObjCRuntimeV2::GetShortPluginName()
{
return pluginShort;
}
uint32_t
AppleObjCRuntimeV2::GetPluginVersion()
{
return 1;
}
void
AppleObjCRuntimeV2::SetExceptionBreakpoints ()
{
if (!m_process)
return;
if (!m_objc_exception_bp_sp)
{
m_objc_exception_bp_sp = m_process->GetTarget().CreateBreakpoint (NULL,
"__cxa_throw",
eFunctionNameTypeBase,
true);
}
}
ClangUtilityFunction *
AppleObjCRuntimeV2::CreateObjectChecker(const char *name)
{
char check_function_code[1024];
int len = 0;
if (m_has_object_getClass)
{
len = ::snprintf (check_function_code,
sizeof(check_function_code),
"extern \"C\" void *gdb_object_getClass(void *); \n"
"extern \"C\" void \n"
"%s(void *$__lldb_arg_obj) \n"
"{ \n"
" if ($__lldb_arg_obj == (void *)0) \n"
" return; // nil is ok \n"
" if (!gdb_object_getClass($__lldb_arg_obj)) \n"
" *((volatile int *)0) = 'ocgc'; \n"
"} \n",
name);
}
else
{
len = ::snprintf (check_function_code,
sizeof(check_function_code),
"extern \"C\" void *gdb_class_getClass(void *); \n"
"extern \"C\" void \n"
"%s(void *$__lldb_arg_obj) \n"
"{ \n"
" if ($__lldb_arg_obj == (void *)0) \n"
" return; // nil is ok \n"
" void **$isa_ptr = (void **)$__lldb_arg_obj; \n"
" if (*$isa_ptr == (void *)0 || !gdb_class_getClass(*$isa_ptr)) \n"
" *((volatile int *)0) = 'ocgc'; \n"
"} \n",
name);
}
assert (len < sizeof(check_function_code));
return new ClangUtilityFunction(check_function_code, name);
}
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