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llvm-project/lldb/source/Expression/ClangExpressionDeclMap.cpp

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//===-- ClangExpressionDeclMap.cpp -----------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "lldb/Expression/ClangExpressionDeclMap.h"
// C Includes
// C++ Includes
// Other libraries and framework includes
// Project includes
#include "clang/AST/DeclarationName.h"
#include "clang/AST/Decl.h"
#include "lldb/lldb-private.h"
#include "lldb/Core/Address.h"
#include "lldb/Core/Error.h"
#include "lldb/Core/Log.h"
#include "lldb/Core/Module.h"
#include "lldb/Core/RegisterValue.h"
#include "lldb/Core/ValueObjectConstResult.h"
#include "lldb/Core/ValueObjectVariable.h"
#include "lldb/Expression/ASTDumper.h"
#include "lldb/Expression/ClangASTSource.h"
#include "lldb/Expression/ClangPersistentVariables.h"
#include "lldb/Host/Endian.h"
#include "lldb/Symbol/ClangASTContext.h"
#include "lldb/Symbol/ClangNamespaceDecl.h"
#include "lldb/Symbol/CompileUnit.h"
#include "lldb/Symbol/Function.h"
#include "lldb/Symbol/ObjectFile.h"
#include "lldb/Symbol/SymbolContext.h"
#include "lldb/Symbol/SymbolVendor.h"
#include "lldb/Symbol/Type.h"
#include "lldb/Symbol/TypeList.h"
#include "lldb/Symbol/Variable.h"
#include "lldb/Symbol/VariableList.h"
#include "lldb/Target/ExecutionContext.h"
#include "lldb/Target/Process.h"
#include "lldb/Target/RegisterContext.h"
#include "lldb/Target/StackFrame.h"
#include "lldb/Target/Target.h"
#include "lldb/Target/Thread.h"
using namespace lldb;
using namespace lldb_private;
using namespace clang;
ClangExpressionDeclMap::ClangExpressionDeclMap (bool keep_result_in_memory, ExecutionContext &exe_ctx) :
ClangASTSource (exe_ctx.GetTargetSP()),
m_found_entities (),
m_struct_members (),
m_keep_result_in_memory (keep_result_in_memory),
m_parser_vars (),
m_struct_vars ()
{
EnableStructVars();
}
ClangExpressionDeclMap::~ClangExpressionDeclMap()
{
// Note: The model is now that the parser's AST context and all associated
// data does not vanish until the expression has been executed. This means
// that valuable lookup data (like namespaces) doesn't vanish, but
DidParse();
DidDematerialize();
DisableStructVars();
}
bool
ClangExpressionDeclMap::WillParse(ExecutionContext &exe_ctx)
{
EnableParserVars();
m_parser_vars->m_exe_ctx = exe_ctx;
Target *target = exe_ctx.GetTargetPtr();
if (exe_ctx.GetFramePtr())
m_parser_vars->m_sym_ctx = exe_ctx.GetFramePtr()->GetSymbolContext(lldb::eSymbolContextEverything);
else if (exe_ctx.GetThreadPtr())
m_parser_vars->m_sym_ctx = exe_ctx.GetThreadPtr()->GetStackFrameAtIndex(0)->GetSymbolContext(lldb::eSymbolContextEverything);
else if (exe_ctx.GetProcessPtr())
{
m_parser_vars->m_sym_ctx.Clear();
m_parser_vars->m_sym_ctx.target_sp = exe_ctx.GetTargetSP();
}
else if (target)
{
m_parser_vars->m_sym_ctx.Clear();
m_parser_vars->m_sym_ctx.target_sp = exe_ctx.GetTargetSP();
}
if (target)
{
m_parser_vars->m_persistent_vars = &target->GetPersistentVariables();
if (!target->GetScratchClangASTContext())
return false;
}
m_parser_vars->m_target_info = GetTargetInfo();
return true;
}
void
ClangExpressionDeclMap::DidParse()
{
if (m_parser_vars.get())
{
for (size_t entity_index = 0, num_entities = m_found_entities.GetSize();
entity_index < num_entities;
++entity_index)
{
ClangExpressionVariableSP var_sp(m_found_entities.GetVariableAtIndex(entity_index));
if (var_sp &&
var_sp->m_parser_vars.get() &&
var_sp->m_parser_vars->m_lldb_value)
delete var_sp->m_parser_vars->m_lldb_value;
var_sp->DisableParserVars();
}
for (size_t pvar_index = 0, num_pvars = m_parser_vars->m_persistent_vars->GetSize();
pvar_index < num_pvars;
++pvar_index)
{
ClangExpressionVariableSP pvar_sp(m_parser_vars->m_persistent_vars->GetVariableAtIndex(pvar_index));
if (pvar_sp)
pvar_sp->DisableParserVars();
}
DisableParserVars();
}
}
// Interface for IRForTarget
ClangExpressionDeclMap::TargetInfo
ClangExpressionDeclMap::GetTargetInfo()
{
assert (m_parser_vars.get());
TargetInfo ret;
ExecutionContext &exe_ctx = m_parser_vars->m_exe_ctx;
Process *process = exe_ctx.GetProcessPtr();
if (process)
{
ret.byte_order = process->GetByteOrder();
ret.address_byte_size = process->GetAddressByteSize();
}
else
{
Target *target = exe_ctx.GetTargetPtr();
if (target)
{
ret.byte_order = target->GetArchitecture().GetByteOrder();
ret.address_byte_size = target->GetArchitecture().GetAddressByteSize();
}
}
return ret;
}
const ConstString &
ClangExpressionDeclMap::GetPersistentResultName ()
{
assert (m_struct_vars.get());
assert (m_parser_vars.get());
if (!m_struct_vars->m_result_name)
{
Target *target = m_parser_vars->GetTarget();
assert (target);
m_struct_vars->m_result_name = target->GetPersistentVariables().GetNextPersistentVariableName();
}
return m_struct_vars->m_result_name;
}
lldb::ClangExpressionVariableSP
ClangExpressionDeclMap::BuildIntegerVariable (const ConstString &name,
lldb_private::TypeFromParser type,
const llvm::APInt& value)
{
assert (m_parser_vars.get());
ExecutionContext &exe_ctx = m_parser_vars->m_exe_ctx;
Target *target = exe_ctx.GetTargetPtr();
if (!target)
return ClangExpressionVariableSP();
ASTContext *context(target->GetScratchClangASTContext()->getASTContext());
TypeFromUser user_type(m_ast_importer->CopyType(context,
type.GetASTContext(),
type.GetOpaqueQualType()),
context);
if (!user_type.GetOpaqueQualType())
{
lldb::LogSP log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_EXPRESSIONS));
if (log)
log->Printf("ClangExpressionDeclMap::BuildIntegerVariable - Couldn't export the type for a constant integer result");
return lldb::ClangExpressionVariableSP();
}
if (!m_parser_vars->m_persistent_vars->CreatePersistentVariable (exe_ctx.GetBestExecutionContextScope (),
name,
user_type,
m_parser_vars->m_target_info.byte_order,
m_parser_vars->m_target_info.address_byte_size))
return lldb::ClangExpressionVariableSP();
ClangExpressionVariableSP pvar_sp (m_parser_vars->m_persistent_vars->GetVariable(name));
if (!pvar_sp)
return lldb::ClangExpressionVariableSP();
uint8_t *pvar_data = pvar_sp->GetValueBytes();
if (pvar_data == NULL)
return lldb::ClangExpressionVariableSP();
uint64_t value64 = value.getLimitedValue();
size_t num_val_bytes = sizeof(value64);
size_t num_data_bytes = pvar_sp->GetByteSize();
size_t num_bytes = num_val_bytes;
if (num_bytes > num_data_bytes)
num_bytes = num_data_bytes;
for (size_t byte_idx = 0;
byte_idx < num_bytes;
++byte_idx)
{
uint64_t shift = byte_idx * 8;
uint64_t mask = 0xffll << shift;
uint8_t cur_byte = (uint8_t)((value64 & mask) >> shift);
switch (m_parser_vars->m_target_info.byte_order)
{
case eByteOrderBig:
// High Low
// Original: |AABBCCDDEEFFGGHH|
// Target: |EEFFGGHH|
pvar_data[num_data_bytes - (1 + byte_idx)] = cur_byte;
break;
case eByteOrderLittle:
// Target: |HHGGFFEE|
pvar_data[byte_idx] = cur_byte;
break;
default:
return lldb::ClangExpressionVariableSP();
}
}
pvar_sp->m_flags |= ClangExpressionVariable::EVIsFreezeDried;
pvar_sp->m_flags |= ClangExpressionVariable::EVIsLLDBAllocated;
pvar_sp->m_flags |= ClangExpressionVariable::EVNeedsAllocation;
return pvar_sp;
}
lldb::ClangExpressionVariableSP
ClangExpressionDeclMap::BuildCastVariable (const ConstString &name,
VarDecl *decl,
lldb_private::TypeFromParser type)
{
assert (m_parser_vars.get());
lldb::LogSP 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 lldb::ClangExpressionVariableSP();
ASTContext *context(target->GetScratchClangASTContext()->getASTContext());
ClangExpressionVariableSP var_sp (m_found_entities.GetVariable(decl));
if (!var_sp)
var_sp = m_parser_vars->m_persistent_vars->GetVariable(decl);
if (!var_sp)
return ClangExpressionVariableSP();
TypeFromUser user_type(m_ast_importer->CopyType(context,
type.GetASTContext(),
type.GetOpaqueQualType()),
context);
if (!user_type.GetOpaqueQualType())
{
lldb::LogSP log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_EXPRESSIONS));
if (log)
log->Printf("ClangExpressionDeclMap::BuildCastVariable - Couldn't export the type for a constant cast result");
return lldb::ClangExpressionVariableSP();
}
TypeFromUser var_type = var_sp->GetTypeFromUser();
StackFrame *frame = exe_ctx.GetFramePtr();
if (frame == NULL)
return lldb::ClangExpressionVariableSP();
VariableSP var = FindVariableInScope (*frame, var_sp->GetName(), &var_type);
if (!var)
return lldb::ClangExpressionVariableSP(); // but we should handle this; it may be a persistent variable
ValueObjectSP var_valobj = frame->GetValueObjectForFrameVariable(var, lldb::eNoDynamicValues);
if (!var_valobj)
return lldb::ClangExpressionVariableSP();
ValueObjectSP var_casted_valobj = var_valobj->CastPointerType(name.GetCString(), user_type);
if (!var_casted_valobj)
return lldb::ClangExpressionVariableSP();
if (log)
{
StreamString my_stream_string;
ClangASTType::DumpTypeDescription (var_type.GetASTContext(),
var_type.GetOpaqueQualType(),
&my_stream_string);
log->Printf("Building cast variable to type: %s", my_stream_string.GetString().c_str());
}
ClangExpressionVariableSP pvar_sp = m_parser_vars->m_persistent_vars->CreatePersistentVariable (var_casted_valobj);
if (!pvar_sp)
return lldb::ClangExpressionVariableSP();
if (pvar_sp != m_parser_vars->m_persistent_vars->GetVariable(name))
return lldb::ClangExpressionVariableSP();
pvar_sp->m_flags |= ClangExpressionVariable::EVIsFreezeDried;
pvar_sp->m_flags |= ClangExpressionVariable::EVIsLLDBAllocated;
pvar_sp->m_flags |= ClangExpressionVariable::EVNeedsAllocation;
return pvar_sp;
}
bool
ClangExpressionDeclMap::ResultIsReference (const ConstString &name)
{
ClangExpressionVariableSP pvar_sp = m_parser_vars->m_persistent_vars->GetVariable(name);
return (pvar_sp->m_flags & ClangExpressionVariable::EVIsProgramReference);
}
bool
ClangExpressionDeclMap::CompleteResultVariable (lldb::ClangExpressionVariableSP &valobj,
lldb_private::Value &value,
const ConstString &name,
lldb_private::TypeFromParser type,
bool transient,
bool maybe_make_load)
{
assert (m_parser_vars.get());
ClangExpressionVariableSP pvar_sp = m_parser_vars->m_persistent_vars->GetVariable(name);
if (!pvar_sp)
return false;
if (maybe_make_load &&
value.GetValueType() == Value::eValueTypeFileAddress &&
m_parser_vars->m_exe_ctx.GetProcessPtr())
{
value.SetValueType(Value::eValueTypeLoadAddress);
}
if (pvar_sp->m_flags & ClangExpressionVariable::EVIsProgramReference &&
!pvar_sp->m_live_sp &&
!transient)
{
// The reference comes from the program. We need to set up a live SP for it.
unsigned long long address = value.GetScalar().ULongLong();
AddressType address_type = value.GetValueAddressType();
pvar_sp->m_live_sp = ValueObjectConstResult::Create(m_parser_vars->m_exe_ctx.GetBestExecutionContextScope(),
pvar_sp->GetTypeFromUser().GetASTContext(),
pvar_sp->GetTypeFromUser().GetOpaqueQualType(),
pvar_sp->GetName(),
address,
address_type,
pvar_sp->GetByteSize());
}
if (pvar_sp->m_flags & ClangExpressionVariable::EVNeedsFreezeDry)
{
pvar_sp->ValueUpdated();
const size_t pvar_byte_size = pvar_sp->GetByteSize();
uint8_t *pvar_data = pvar_sp->GetValueBytes();
if (!ReadTarget(pvar_data, value, pvar_byte_size))
return false;
pvar_sp->m_flags &= ~(ClangExpressionVariable::EVNeedsFreezeDry);
}
valobj = pvar_sp;
return true;
}
void
ClangExpressionDeclMap::RemoveResultVariable
(
const ConstString &name
)
{
ClangExpressionVariableSP pvar_sp = m_parser_vars->m_persistent_vars->GetVariable(name);
m_parser_vars->m_persistent_vars->RemovePersistentVariable(pvar_sp);
}
bool
ClangExpressionDeclMap::AddPersistentVariable
(
const NamedDecl *decl,
const ConstString &name,
TypeFromParser parser_type,
bool is_result,
bool is_lvalue
)
{
assert (m_parser_vars.get());
lldb::LogSP 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;
ASTContext *context(target->GetScratchClangASTContext()->getASTContext());
TypeFromUser user_type(m_ast_importer->DeportType(context,
parser_type.GetASTContext(),
parser_type.GetOpaqueQualType()),
context);
if (!user_type.GetOpaqueQualType())
{
if (log)
log->Printf("Persistent variable's type wasn't copied successfully");
return false;
}
if (!m_parser_vars->m_target_info.IsValid())
return false;
if (!m_parser_vars->m_persistent_vars->CreatePersistentVariable (exe_ctx.GetBestExecutionContextScope (),
name,
user_type,
m_parser_vars->m_target_info.byte_order,
m_parser_vars->m_target_info.address_byte_size))
return false;
ClangExpressionVariableSP var_sp (m_parser_vars->m_persistent_vars->GetVariable(name));
if (!var_sp)
return false;
if (is_result)
var_sp->m_flags |= ClangExpressionVariable::EVNeedsFreezeDry;
else
var_sp->m_flags |= ClangExpressionVariable::EVKeepInTarget; // explicitly-declared persistent variables should persist
if (is_lvalue)
{
var_sp->m_flags |= ClangExpressionVariable::EVIsProgramReference;
}
else
{
var_sp->m_flags |= ClangExpressionVariable::EVIsLLDBAllocated;
var_sp->m_flags |= ClangExpressionVariable::EVNeedsAllocation;
}
if (log)
log->Printf("Created persistent variable with flags 0x%hx", var_sp->m_flags);
var_sp->EnableParserVars();
var_sp->m_parser_vars->m_named_decl = decl;
var_sp->m_parser_vars->m_parser_type = parser_type;
return true;
}
bool
ClangExpressionDeclMap::AddValueToStruct
(
const NamedDecl *decl,
const ConstString &name,
llvm::Value *value,
size_t size,
off_t alignment
)
{
assert (m_struct_vars.get());
assert (m_parser_vars.get());
lldb::LogSP log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_EXPRESSIONS));
m_struct_vars->m_struct_laid_out = false;
if (m_struct_members.GetVariable(decl))
return true;
ClangExpressionVariableSP var_sp (m_found_entities.GetVariable(decl));
if (!var_sp)
var_sp = m_parser_vars->m_persistent_vars->GetVariable(decl);
if (!var_sp)
return false;
if (log)
log->Printf("Adding value for (NamedDecl*)%p [%s - %s] to the structure",
decl,
name.GetCString(),
var_sp->GetName().GetCString());
// We know entity->m_parser_vars is valid because we used a parser variable
// to find it
var_sp->m_parser_vars->m_llvm_value = value;
var_sp->EnableJITVars();
var_sp->m_jit_vars->m_alignment = alignment;
var_sp->m_jit_vars->m_size = size;
m_struct_members.AddVariable(var_sp);
return true;
}
bool
ClangExpressionDeclMap::DoStructLayout ()
{
assert (m_struct_vars.get());
if (m_struct_vars->m_struct_laid_out)
return true;
off_t cursor = 0;
m_struct_vars->m_struct_alignment = 0;
m_struct_vars->m_struct_size = 0;
for (size_t member_index = 0, num_members = m_struct_members.GetSize();
member_index < num_members;
++member_index)
{
ClangExpressionVariableSP member_sp(m_struct_members.GetVariableAtIndex(member_index));
if (!member_sp)
return false;
if (!member_sp->m_jit_vars.get())
return false;
if (member_index == 0)
m_struct_vars->m_struct_alignment = member_sp->m_jit_vars->m_alignment;
if (cursor % member_sp->m_jit_vars->m_alignment)
cursor += (member_sp->m_jit_vars->m_alignment - (cursor % member_sp->m_jit_vars->m_alignment));
member_sp->m_jit_vars->m_offset = cursor;
cursor += member_sp->m_jit_vars->m_size;
}
m_struct_vars->m_struct_size = cursor;
m_struct_vars->m_struct_laid_out = true;
return true;
}
bool ClangExpressionDeclMap::GetStructInfo
(
uint32_t &num_elements,
size_t &size,
off_t &alignment
)
{
assert (m_struct_vars.get());
if (!m_struct_vars->m_struct_laid_out)
return false;
num_elements = m_struct_members.GetSize();
size = m_struct_vars->m_struct_size;
alignment = m_struct_vars->m_struct_alignment;
return true;
}
bool
ClangExpressionDeclMap::GetStructElement
(
const NamedDecl *&decl,
llvm::Value *&value,
off_t &offset,
ConstString &name,
uint32_t index
)
{
assert (m_struct_vars.get());
if (!m_struct_vars->m_struct_laid_out)
return false;
if (index >= m_struct_members.GetSize())
return false;
ClangExpressionVariableSP member_sp(m_struct_members.GetVariableAtIndex(index));
if (!member_sp ||
!member_sp->m_parser_vars.get() ||
!member_sp->m_jit_vars.get() ||
!member_sp->GetValueObject())
return false;
decl = member_sp->m_parser_vars->m_named_decl;
value = member_sp->m_parser_vars->m_llvm_value;
offset = member_sp->m_jit_vars->m_offset;
name = member_sp->GetName();
return true;
}
bool
ClangExpressionDeclMap::GetFunctionInfo
(
const NamedDecl *decl,
uint64_t &ptr
)
{
ClangExpressionVariableSP entity_sp(m_found_entities.GetVariable(decl));
if (!entity_sp)
return false;
// We know m_parser_vars is valid since we searched for the variable by
// its NamedDecl
ptr = entity_sp->m_parser_vars->m_lldb_value->GetScalar().ULongLong();
return true;
}
static void
FindCodeSymbolInContext
(
const ConstString &name,
SymbolContext &sym_ctx,
SymbolContextList &sc_list
)
{
if (sym_ctx.module_sp)
sym_ctx.module_sp->FindSymbolsWithNameAndType(name, eSymbolTypeCode, sc_list);
if (!sc_list.GetSize())
sym_ctx.target_sp->GetImages().FindSymbolsWithNameAndType(name, eSymbolTypeCode, sc_list);
}
bool
ClangExpressionDeclMap::GetFunctionAddress
(
const ConstString &name,
uint64_t &func_addr
)
{
assert (m_parser_vars.get());
lldb::LogSP log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_EXPRESSIONS));
ExecutionContext &exe_ctx = m_parser_vars->m_exe_ctx;
Target *target = exe_ctx.GetTargetPtr();
// Back out in all cases where we're not fully initialized
if (target == NULL)
return false;
if (!m_parser_vars->m_sym_ctx.target_sp)
return false;
SymbolContextList sc_list;
FindCodeSymbolInContext(name, m_parser_vars->m_sym_ctx, sc_list);
if (!sc_list.GetSize())
{
// We occasionally get debug information in which a const function is reported
// as non-const, so the mangled name is wrong. This is a hack to compensate.
if (!strncmp(name.GetCString(), "_ZN", 3) &&
strncmp(name.GetCString(), "_ZNK", 4))
{
std::string fixed_scratch("_ZNK");
fixed_scratch.append(name.GetCString() + 3);
ConstString fixed_name(fixed_scratch.c_str());
if (log)
log->Printf("Failed to find symbols given non-const name %s; trying %s", name.GetCString(), fixed_name.GetCString());
FindCodeSymbolInContext(fixed_name, m_parser_vars->m_sym_ctx, sc_list);
}
}
if (!sc_list.GetSize())
return false;
SymbolContext sym_ctx;
sc_list.GetContextAtIndex(0, sym_ctx);
const Address *func_so_addr = NULL;
if (sym_ctx.function)
func_so_addr = &sym_ctx.function->GetAddressRange().GetBaseAddress();
else if (sym_ctx.symbol)
func_so_addr = &sym_ctx.symbol->GetAddress();
else
return false;
if (!func_so_addr || !func_so_addr->IsValid())
return false;
func_addr = func_so_addr->GetCallableLoadAddress (target);
return true;
}
addr_t
ClangExpressionDeclMap::GetSymbolAddress (Target &target, const ConstString &name, lldb::SymbolType symbol_type)
{
SymbolContextList sc_list;
target.GetImages().FindSymbolsWithNameAndType(name, symbol_type, sc_list);
const uint32_t num_matches = sc_list.GetSize();
addr_t symbol_load_addr = LLDB_INVALID_ADDRESS;
for (uint32_t i=0; i<num_matches && (symbol_load_addr == 0 || symbol_load_addr == LLDB_INVALID_ADDRESS); i++)
{
SymbolContext sym_ctx;
sc_list.GetContextAtIndex(i, sym_ctx);
const Address *sym_address = &sym_ctx.symbol->GetAddress();
if (!sym_address || !sym_address->IsValid())
return LLDB_INVALID_ADDRESS;
if (sym_address)
{
switch (sym_ctx.symbol->GetType())
{
case eSymbolTypeCode:
case eSymbolTypeTrampoline:
symbol_load_addr = sym_address->GetCallableLoadAddress (&target);
break;
case eSymbolTypeData:
case eSymbolTypeRuntime:
case eSymbolTypeVariable:
case eSymbolTypeLocal:
case eSymbolTypeParam:
case eSymbolTypeInvalid:
case eSymbolTypeAbsolute:
case eSymbolTypeException:
case eSymbolTypeSourceFile:
case eSymbolTypeHeaderFile:
case eSymbolTypeObjectFile:
case eSymbolTypeCommonBlock:
case eSymbolTypeBlock:
case eSymbolTypeVariableType:
case eSymbolTypeLineEntry:
case eSymbolTypeLineHeader:
case eSymbolTypeScopeBegin:
case eSymbolTypeScopeEnd:
case eSymbolTypeAdditional:
case eSymbolTypeCompiler:
case eSymbolTypeInstrumentation:
case eSymbolTypeUndefined:
case eSymbolTypeObjCClass:
case eSymbolTypeObjCMetaClass:
case eSymbolTypeObjCIVar:
symbol_load_addr = sym_address->GetLoadAddress (&target);
break;
}
}
}
return symbol_load_addr;
}
addr_t
ClangExpressionDeclMap::GetSymbolAddress (const ConstString &name, lldb::SymbolType symbol_type)
{
assert (m_parser_vars.get());
if (!m_parser_vars->m_exe_ctx.GetTargetPtr())
return false;
return GetSymbolAddress(m_parser_vars->m_exe_ctx.GetTargetRef(), name, symbol_type);
}
// Interface for IRInterpreter
Value
ClangExpressionDeclMap::WrapBareAddress (lldb::addr_t addr)
{
Value ret;
ret.SetContext(Value::eContextTypeInvalid, NULL);
if (m_parser_vars->m_exe_ctx.GetProcessPtr())
ret.SetValueType(Value::eValueTypeLoadAddress);
else
ret.SetValueType(Value::eValueTypeFileAddress);
ret.GetScalar() = (unsigned long long)addr;
return ret;
}
bool
ClangExpressionDeclMap::WriteTarget (lldb_private::Value &value,
const uint8_t *data,
size_t length)
{
assert (m_parser_vars.get());
ExecutionContext &exe_ctx = m_parser_vars->m_exe_ctx;
Process *process = exe_ctx.GetProcessPtr();
if (value.GetContextType() == Value::eContextTypeRegisterInfo)
{
if (!process)
return false;
RegisterContext *reg_ctx = exe_ctx.GetRegisterContext();
RegisterInfo *reg_info = value.GetRegisterInfo();
if (!reg_ctx)
return false;
lldb_private::RegisterValue reg_value;
Error err;
if (!reg_value.SetFromMemoryData (reg_info, data, length, process->GetByteOrder(), err))
return false;
return reg_ctx->WriteRegister(reg_info, reg_value);
}
else
{
switch (value.GetValueType())
{
default:
return false;
case Value::eValueTypeFileAddress:
{
if (!process)
return false;
Target *target = exe_ctx.GetTargetPtr();
Address file_addr;
if (!target->GetImages().ResolveFileAddress((lldb::addr_t)value.GetScalar().ULongLong(), file_addr))
return false;
lldb::addr_t load_addr = file_addr.GetLoadAddress(target);
Error err;
process->WriteMemory(load_addr, data, length, err);
return err.Success();
}
case Value::eValueTypeLoadAddress:
{
if (!process)
return false;
Error err;
process->WriteMemory((lldb::addr_t)value.GetScalar().ULongLong(), data, length, err);
return err.Success();
}
case Value::eValueTypeHostAddress:
{
if (value.GetScalar().ULongLong() == 0 || data == NULL)
return false;
memcpy ((void *)value.GetScalar().ULongLong(), data, length);
return true;
}
case Value::eValueTypeScalar:
return false;
}
}
}
bool
ClangExpressionDeclMap::ReadTarget (uint8_t *data,
lldb_private::Value &value,
size_t length)
{
assert (m_parser_vars.get());
ExecutionContext &exe_ctx = m_parser_vars->m_exe_ctx;
Process *process = exe_ctx.GetProcessPtr();
if (value.GetContextType() == Value::eContextTypeRegisterInfo)
{
if (!process)
return false;
RegisterContext *reg_ctx = exe_ctx.GetRegisterContext();
RegisterInfo *reg_info = value.GetRegisterInfo();
if (!reg_ctx)
return false;
lldb_private::RegisterValue reg_value;
Error err;
if (!reg_ctx->ReadRegister(reg_info, reg_value))
return false;
return reg_value.GetAsMemoryData(reg_info, data, length, process->GetByteOrder(), err);
}
else
{
switch (value.GetValueType())
{
default:
return false;
case Value::eValueTypeFileAddress:
{
Target *target = exe_ctx.GetTargetPtr();
if (target == NULL)
return false;
Address file_addr;
if (!target->GetImages().ResolveFileAddress((lldb::addr_t)value.GetScalar().ULongLong(), file_addr))
return false;
Error err;
target->ReadMemory(file_addr, false, data, length, err);
return err.Success();
}
case Value::eValueTypeLoadAddress:
{
if (!process)
return false;
Error err;
process->ReadMemory((lldb::addr_t)value.GetScalar().ULongLong(), data, length, err);
return err.Success();
}
case Value::eValueTypeHostAddress:
{
void *host_addr = (void*)value.GetScalar().ULongLong();
if (!host_addr)
return false;
memcpy (data, host_addr, length);
return true;
}
case Value::eValueTypeScalar:
return false;
}
}
}
lldb_private::Value
ClangExpressionDeclMap::LookupDecl (clang::NamedDecl *decl, ClangExpressionVariable::FlagType &flags)
{
assert (m_parser_vars.get());
ClangExpressionVariableSP expr_var_sp (m_found_entities.GetVariable(decl));
ClangExpressionVariableSP persistent_var_sp (m_parser_vars->m_persistent_vars->GetVariable(decl));
if (expr_var_sp)
{
flags = expr_var_sp->m_flags;
if (!expr_var_sp->m_parser_vars.get())
return Value();
bool is_reference = expr_var_sp->m_flags & ClangExpressionVariable::EVTypeIsReference;
if (expr_var_sp->m_parser_vars->m_lldb_var)
{
std::auto_ptr<Value> value(GetVariableValue(expr_var_sp->m_parser_vars->m_lldb_var, NULL));
if (is_reference && value.get() && value->GetValueType() == Value::eValueTypeLoadAddress)
{
Process *process = m_parser_vars->m_exe_ctx.GetProcessPtr();
if (!process)
return Value();
lldb::addr_t value_addr = value->GetScalar().ULongLong();
Error read_error;
addr_t ref_value = process->ReadPointerFromMemory (value_addr, read_error);
if (!read_error.Success())
return Value();
value->GetScalar() = (unsigned long long)ref_value;
}
if (value.get())
return *value;
else
return Value();
}
else if (expr_var_sp->m_parser_vars->m_lldb_sym)
{
const Address sym_address = expr_var_sp->m_parser_vars->m_lldb_sym->GetAddress();
if (!sym_address.IsValid())
return Value();
Value ret;
ProcessSP process_sp (m_parser_vars->m_exe_ctx.GetProcessSP());
if (process_sp)
{
uint64_t symbol_load_addr = sym_address.GetLoadAddress(&process_sp->GetTarget());
ret.GetScalar() = symbol_load_addr;
ret.SetValueType(Value::eValueTypeLoadAddress);
}
else
{
uint64_t symbol_file_addr = sym_address.GetFileAddress();
ret.GetScalar() = symbol_file_addr;
ret.SetValueType(Value::eValueTypeFileAddress);
}
return ret;
}
else if (RegisterInfo *reg_info = expr_var_sp->GetRegisterInfo())
{
StackFrame *frame = m_parser_vars->m_exe_ctx.GetFramePtr();
if (!frame)
return Value();
RegisterContextSP reg_context_sp(frame->GetRegisterContextSP());
RegisterValue reg_value;
if (!reg_context_sp->ReadRegister(reg_info, reg_value))
return Value();
Value ret;
ret.SetContext(Value::eContextTypeRegisterInfo, reg_info);
if (!reg_value.GetScalarValue(ret.GetScalar()))
return Value();
return ret;
}
else
{
return Value();
}
}
else if (persistent_var_sp)
{
flags = persistent_var_sp->m_flags;
if ((persistent_var_sp->m_flags & ClangExpressionVariable::EVIsProgramReference ||
persistent_var_sp->m_flags & ClangExpressionVariable::EVIsLLDBAllocated) &&
persistent_var_sp->m_live_sp &&
((persistent_var_sp->m_live_sp->GetValue().GetValueType() == Value::eValueTypeLoadAddress &&
m_parser_vars->m_exe_ctx.GetProcessSP() &&
m_parser_vars->m_exe_ctx.GetProcessSP()->IsAlive()) ||
(persistent_var_sp->m_live_sp->GetValue().GetValueType() == Value::eValueTypeFileAddress)))
{
return persistent_var_sp->m_live_sp->GetValue();
}
else
{
lldb_private::Value ret;
ret.SetValueType(Value::eValueTypeHostAddress);
ret.SetContext(Value::eContextTypeInvalid, NULL);
ret.GetScalar() = (lldb::addr_t)persistent_var_sp->GetValueBytes();
return ret;
}
}
else
{
return Value();
}
}
Value
ClangExpressionDeclMap::GetSpecialValue (const ConstString &name)
{
assert(m_parser_vars.get());
StackFrame *frame = m_parser_vars->m_exe_ctx.GetFramePtr();
if (!frame)
return Value();
VariableList *vars = frame->GetVariableList(false);
if (!vars)
return Value();
lldb::VariableSP var = vars->FindVariable(name);
if (!var ||
!var->IsInScope(frame) ||
!var->LocationIsValidForFrame (frame))
return Value();
std::auto_ptr<Value> value(GetVariableValue(var, NULL));
if (value.get() && value->GetValueType() == Value::eValueTypeLoadAddress)
{
Process *process = m_parser_vars->m_exe_ctx.GetProcessPtr();
if (!process)
return Value();
lldb::addr_t value_addr = value->GetScalar().ULongLong();
Error read_error;
addr_t ptr_value = process->ReadPointerFromMemory (value_addr, read_error);
if (!read_error.Success())
return Value();
value->GetScalar() = (unsigned long long)ptr_value;
}
if (value.get())
return *value;
else
return Value();
}
// Interface for CommandObjectExpression
bool
ClangExpressionDeclMap::Materialize
(
lldb::addr_t &struct_address,
Error &err
)
{
if (!m_parser_vars.get())
return false;
EnableMaterialVars();
m_material_vars->m_process = m_parser_vars->m_exe_ctx.GetProcessPtr();
bool result = DoMaterialize(false /* dematerialize */,
LLDB_INVALID_ADDRESS /* top of stack frame */,
LLDB_INVALID_ADDRESS /* bottom of stack frame */,
NULL, /* result SP */
err);
if (result)
struct_address = m_material_vars->m_materialized_location;
return result;
}
bool
ClangExpressionDeclMap::GetObjectPointer
(
lldb::addr_t &object_ptr,
ConstString &object_name,
Error &err,
bool suppress_type_check
)
{
assert (m_struct_vars.get());
Target *target = m_parser_vars->m_exe_ctx.GetTargetPtr();
Process *process = m_parser_vars->m_exe_ctx.GetProcessPtr();
StackFrame *frame = m_parser_vars->m_exe_ctx.GetFramePtr();
if (frame == NULL || process == NULL || target == NULL)
{
err.SetErrorStringWithFormat("Couldn't load '%s' because the context is incomplete", object_name.AsCString());
return false;
}
if (!m_struct_vars->m_object_pointer_type.GetOpaqueQualType())
{
err.SetErrorStringWithFormat("Couldn't load '%s' because its type is unknown", object_name.AsCString());
return false;
}
const bool object_pointer = true;
VariableSP object_ptr_var = FindVariableInScope (*frame,
object_name,
(suppress_type_check ? NULL : &m_struct_vars->m_object_pointer_type),
object_pointer);
if (!object_ptr_var)
{
err.SetErrorStringWithFormat("Couldn't find '%s' with appropriate type in scope", object_name.AsCString());
return false;
}
std::auto_ptr<lldb_private::Value> location_value(GetVariableValue(object_ptr_var,
NULL));
if (!location_value.get())
{
err.SetErrorStringWithFormat("Couldn't get the location for '%s'", object_name.GetCString());
return false;
}
switch (location_value->GetValueType())
{
default:
err.SetErrorStringWithFormat("'%s' is not in memory; LLDB must be extended to handle registers", object_name.GetCString());
return false;
case Value::eValueTypeLoadAddress:
{
lldb::addr_t value_addr = location_value->GetScalar().ULongLong();
uint32_t address_byte_size = target->GetArchitecture().GetAddressByteSize();
if (ClangASTType::GetClangTypeBitWidth(m_struct_vars->m_object_pointer_type.GetASTContext(),
m_struct_vars->m_object_pointer_type.GetOpaqueQualType()) != address_byte_size * 8)
{
err.SetErrorStringWithFormat("'%s' is not of an expected pointer size", object_name.GetCString());
return false;
}
Error read_error;
object_ptr = process->ReadPointerFromMemory (value_addr, read_error);
if (read_error.Fail() || object_ptr == LLDB_INVALID_ADDRESS)
{
err.SetErrorStringWithFormat("Coldn't read '%s' from the target: %s", object_name.GetCString(), read_error.AsCString());
return false;
}
return true;
}
case Value::eValueTypeScalar:
{
if (location_value->GetContextType() != Value::eContextTypeRegisterInfo)
{
StreamString ss;
location_value->Dump(&ss);
err.SetErrorStringWithFormat("%s is a scalar of unhandled type: %s", object_name.GetCString(), ss.GetString().c_str());
return false;
}
RegisterInfo *reg_info = location_value->GetRegisterInfo();
if (!reg_info)
{
err.SetErrorStringWithFormat("Couldn't get the register information for %s", object_name.GetCString());
return false;
}
RegisterContext *reg_ctx = m_parser_vars->m_exe_ctx.GetRegisterContext();
if (!reg_ctx)
{
err.SetErrorStringWithFormat("Couldn't read register context to read %s from %s", object_name.GetCString(), reg_info->name);
return false;
}
uint32_t register_number = reg_info->kinds[lldb::eRegisterKindLLDB];
object_ptr = reg_ctx->ReadRegisterAsUnsigned(register_number, 0x0);
return true;
}
}
}
bool
ClangExpressionDeclMap::Dematerialize
(
ClangExpressionVariableSP &result_sp,
lldb::addr_t stack_frame_top,
lldb::addr_t stack_frame_bottom,
Error &err
)
{
return DoMaterialize(true, stack_frame_top, stack_frame_bottom, &result_sp, err);
DidDematerialize();
}
void
ClangExpressionDeclMap::DidDematerialize()
{
if (m_material_vars.get())
{
if (m_material_vars->m_materialized_location)
{
//#define SINGLE_STEP_EXPRESSIONS
#ifndef SINGLE_STEP_EXPRESSIONS
m_material_vars->m_process->DeallocateMemory(m_material_vars->m_materialized_location);
#endif
m_material_vars->m_materialized_location = 0;
}
DisableMaterialVars();
}
}
bool
ClangExpressionDeclMap::DumpMaterializedStruct
(
Stream &s,
Error &err
)
{
assert (m_struct_vars.get());
assert (m_material_vars.get());
if (!m_struct_vars->m_struct_laid_out)
{
err.SetErrorString("Structure hasn't been laid out yet");
return false;
}
Process *process = m_parser_vars->m_exe_ctx.GetProcessPtr();
if (!process)
{
err.SetErrorString("Couldn't find the process");
return false;
}
Target *target = m_parser_vars->m_exe_ctx.GetTargetPtr();
if (!target)
{
err.SetErrorString("Couldn't find the target");
return false;
}
if (!m_material_vars->m_materialized_location)
{
err.SetErrorString("No materialized location");
return false;
}
lldb::DataBufferSP data_sp(new DataBufferHeap(m_struct_vars->m_struct_size, 0));
Error error;
if (process->ReadMemory (m_material_vars->m_materialized_location,
data_sp->GetBytes(),
data_sp->GetByteSize(), error) != data_sp->GetByteSize())
{
err.SetErrorStringWithFormat ("Couldn't read struct from the target: %s", error.AsCString());
return false;
}
DataExtractor extractor(data_sp, process->GetByteOrder(), target->GetArchitecture().GetAddressByteSize());
for (size_t member_idx = 0, num_members = m_struct_members.GetSize();
member_idx < num_members;
++member_idx)
{
ClangExpressionVariableSP member_sp(m_struct_members.GetVariableAtIndex(member_idx));
if (!member_sp)
return false;
s.Printf("[%s]\n", member_sp->GetName().GetCString());
if (!member_sp->m_jit_vars.get())
return false;
extractor.Dump (&s, // stream
member_sp->m_jit_vars->m_offset, // offset
lldb::eFormatBytesWithASCII, // format
1, // byte size of individual entries
member_sp->m_jit_vars->m_size, // number of entries
16, // entries per line
m_material_vars->m_materialized_location + member_sp->m_jit_vars->m_offset, // address to print
0, // bit size (bitfields only; 0 means ignore)
0); // bit alignment (bitfields only; 0 means ignore)
s.PutChar('\n');
}
return true;
}
bool
ClangExpressionDeclMap::DoMaterialize
(
bool dematerialize,
lldb::addr_t stack_frame_top,
lldb::addr_t stack_frame_bottom,
lldb::ClangExpressionVariableSP *result_sp_ptr,
Error &err
)
{
if (result_sp_ptr)
result_sp_ptr->reset();
assert (m_struct_vars.get());
lldb::LogSP log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_EXPRESSIONS));
if (!m_struct_vars->m_struct_laid_out)
{
err.SetErrorString("Structure hasn't been laid out yet");
return false;
}
StackFrame *frame = m_parser_vars->m_exe_ctx.GetFramePtr();
if (!frame)
{
err.SetErrorString("Received null execution frame");
return false;
}
Target *target = m_parser_vars->m_exe_ctx.GetTargetPtr();
ClangPersistentVariables &persistent_vars = target->GetPersistentVariables();
if (!m_struct_vars->m_struct_size)
{
if (log)
log->PutCString("Not bothering to allocate a struct because no arguments are needed");
m_material_vars->m_allocated_area = NULL;
return true;
}
const SymbolContext &sym_ctx(frame->GetSymbolContext(lldb::eSymbolContextEverything));
if (!dematerialize)
{
Process *process = m_parser_vars->m_exe_ctx.GetProcessPtr();
if (m_material_vars->m_materialized_location)
{
process->DeallocateMemory(m_material_vars->m_materialized_location);
m_material_vars->m_materialized_location = 0;
}
if (log)
log->PutCString("Allocating memory for materialized argument struct");
lldb::addr_t mem = process->AllocateMemory(m_struct_vars->m_struct_alignment + m_struct_vars->m_struct_size,
lldb::ePermissionsReadable | lldb::ePermissionsWritable,
err);
if (mem == LLDB_INVALID_ADDRESS)
{
err.SetErrorStringWithFormat("Couldn't allocate 0x%llx bytes for materialized argument struct",
(unsigned long long)(m_struct_vars->m_struct_alignment + m_struct_vars->m_struct_size));
return false;
}
m_material_vars->m_allocated_area = mem;
}
m_material_vars->m_materialized_location = m_material_vars->m_allocated_area;
if (m_material_vars->m_materialized_location % m_struct_vars->m_struct_alignment)
m_material_vars->m_materialized_location += (m_struct_vars->m_struct_alignment - (m_material_vars->m_materialized_location % m_struct_vars->m_struct_alignment));
for (uint64_t member_index = 0, num_members = m_struct_members.GetSize();
member_index < num_members;
++member_index)
{
ClangExpressionVariableSP member_sp(m_struct_members.GetVariableAtIndex(member_index));
if (m_found_entities.ContainsVariable (member_sp))
{
RegisterInfo *reg_info = member_sp->GetRegisterInfo ();
if (reg_info)
{
// This is a register variable
RegisterContext *reg_ctx = m_parser_vars->m_exe_ctx.GetRegisterContext();
if (!reg_ctx)
{
err.SetErrorString("Couldn't get register context");
return false;
}
if (!DoMaterializeOneRegister (dematerialize,
*reg_ctx,
*reg_info,
m_material_vars->m_materialized_location + member_sp->m_jit_vars->m_offset,
err))
return false;
}
else
{
if (!member_sp->m_jit_vars.get())
{
err.SetErrorString("Variable being materialized doesn't have necessary state");
return false;
}
if (!DoMaterializeOneVariable (dematerialize,
sym_ctx,
member_sp,
m_material_vars->m_materialized_location + member_sp->m_jit_vars->m_offset,
err))
return false;
}
}
else
{
// No need to look for presistent variables if the name doesn't start
// with with a '$' character...
if (member_sp->GetName().AsCString ("!")[0] == '$' && persistent_vars.ContainsVariable(member_sp))
{
if (member_sp->GetName() == m_struct_vars->m_result_name)
{
if (log)
log->PutCString("Found result member in the struct");
if (result_sp_ptr)
*result_sp_ptr = member_sp;
}
if (!DoMaterializeOnePersistentVariable (dematerialize,
member_sp,
m_material_vars->m_materialized_location + member_sp->m_jit_vars->m_offset,
stack_frame_top,
stack_frame_bottom,
err))
return false;
}
else
{
err.SetErrorStringWithFormat("Unexpected variable %s", member_sp->GetName().GetCString());
return false;
}
}
}
return true;
}
bool
ClangExpressionDeclMap::DoMaterializeOnePersistentVariable
(
bool dematerialize,
ClangExpressionVariableSP &var_sp,
lldb::addr_t addr,
lldb::addr_t stack_frame_top,
lldb::addr_t stack_frame_bottom,
Error &err
)
{
lldb::LogSP log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_EXPRESSIONS));
if (!var_sp)
{
err.SetErrorString("Invalid persistent variable");
return LLDB_INVALID_ADDRESS;
}
const size_t pvar_byte_size = var_sp->GetByteSize();
uint8_t *pvar_data = var_sp->GetValueBytes();
if (pvar_data == NULL)
{
err.SetErrorString("Persistent variable being materialized contains no data");
return false;
}
Error error;
Process *process = m_parser_vars->m_exe_ctx.GetProcessPtr();
lldb::addr_t mem; // The address of a spare memory area used to hold the persistent variable.
if (dematerialize)
{
if (log)
log->Printf("Dematerializing persistent variable with flags 0x%hx", var_sp->m_flags);
if ((var_sp->m_flags & ClangExpressionVariable::EVIsLLDBAllocated) ||
(var_sp->m_flags & ClangExpressionVariable::EVIsProgramReference))
{
// Get the location of the target out of the struct.
Error read_error;
mem = process->ReadPointerFromMemory (addr, read_error);
if (mem == LLDB_INVALID_ADDRESS)
{
err.SetErrorStringWithFormat("Couldn't read address of %s from struct: %s", var_sp->GetName().GetCString(), error.AsCString());
return false;
}
if (var_sp->m_flags & ClangExpressionVariable::EVIsProgramReference &&
!var_sp->m_live_sp)
{
// If the reference comes from the program, then the ClangExpressionVariable's
// live variable data hasn't been set up yet. Do this now.
var_sp->m_live_sp = ValueObjectConstResult::Create (m_parser_vars->m_exe_ctx.GetBestExecutionContextScope (),
var_sp->GetTypeFromUser().GetASTContext(),
var_sp->GetTypeFromUser().GetOpaqueQualType(),
var_sp->GetName(),
mem,
eAddressTypeLoad,
pvar_byte_size);
}
if (!var_sp->m_live_sp)
{
err.SetErrorStringWithFormat("Couldn't find the memory area used to store %s", var_sp->GetName().GetCString());
return false;
}
if (var_sp->m_live_sp->GetValue().GetValueAddressType() != eAddressTypeLoad)
{
err.SetErrorStringWithFormat("The address of the memory area for %s is in an incorrect format", var_sp->GetName().GetCString());
return false;
}
if (var_sp->m_flags & ClangExpressionVariable::EVNeedsFreezeDry ||
var_sp->m_flags & ClangExpressionVariable::EVKeepInTarget)
{
mem = var_sp->m_live_sp->GetValue().GetScalar().ULongLong();
if (log)
log->Printf("Dematerializing %s from 0x%llx", var_sp->GetName().GetCString(), (uint64_t)mem);
// Read the contents of the spare memory area
var_sp->ValueUpdated ();
if (process->ReadMemory (mem, pvar_data, pvar_byte_size, error) != pvar_byte_size)
{
err.SetErrorStringWithFormat ("Couldn't read a composite type from the target: %s", error.AsCString());
return false;
}
if (stack_frame_top != LLDB_INVALID_ADDRESS &&
stack_frame_bottom != LLDB_INVALID_ADDRESS &&
mem >= stack_frame_bottom &&
mem <= stack_frame_top)
{
// If the variable is resident in the stack frame created by the expression,
// then it cannot be relied upon to stay around. We treat it as needing
// reallocation.
var_sp->m_flags |= ClangExpressionVariable::EVIsLLDBAllocated;
var_sp->m_flags |= ClangExpressionVariable::EVNeedsAllocation;
var_sp->m_flags &= ~ClangExpressionVariable::EVIsProgramReference;
}
var_sp->m_flags &= ~ClangExpressionVariable::EVNeedsFreezeDry;
}
if (var_sp->m_flags & ClangExpressionVariable::EVNeedsAllocation &&
!(var_sp->m_flags & ClangExpressionVariable::EVKeepInTarget))
{
if (m_keep_result_in_memory)
{
var_sp->m_flags |= ClangExpressionVariable::EVKeepInTarget;
}
else
{
Error deallocate_error = process->DeallocateMemory(mem);
if (!err.Success())
{
err.SetErrorStringWithFormat ("Couldn't deallocate memory for %s: %s", var_sp->GetName().GetCString(), deallocate_error.AsCString());
return false;
}
}
}
}
else
{
err.SetErrorStringWithFormat("Persistent variables without separate allocations are not currently supported.");
return false;
}
}
else
{
if (log)
log->Printf("Materializing persistent variable with flags 0x%hx", var_sp->m_flags);
if (var_sp->m_flags & ClangExpressionVariable::EVNeedsAllocation)
{
// Allocate a spare memory area to store the persistent variable's contents.
Error allocate_error;
mem = process->AllocateMemory(pvar_byte_size,
lldb::ePermissionsReadable | lldb::ePermissionsWritable,
allocate_error);
if (mem == LLDB_INVALID_ADDRESS)
{
err.SetErrorStringWithFormat("Couldn't allocate a memory area to store %s: %s", var_sp->GetName().GetCString(), allocate_error.AsCString());
return false;
}
if (log)
log->Printf("Allocated %s (0x%llx) sucessfully", var_sp->GetName().GetCString(), mem);
// Put the location of the spare memory into the live data of the ValueObject.
var_sp->m_live_sp = ValueObjectConstResult::Create (m_parser_vars->m_exe_ctx.GetBestExecutionContextScope(),
var_sp->GetTypeFromUser().GetASTContext(),
var_sp->GetTypeFromUser().GetOpaqueQualType(),
var_sp->GetName(),
mem,
eAddressTypeLoad,
pvar_byte_size);
// Clear the flag if the variable will never be deallocated.
if (var_sp->m_flags & ClangExpressionVariable::EVKeepInTarget)
var_sp->m_flags &= ~ClangExpressionVariable::EVNeedsAllocation;
// Write the contents of the variable to the area.
if (process->WriteMemory (mem, pvar_data, pvar_byte_size, error) != pvar_byte_size)
{
err.SetErrorStringWithFormat ("Couldn't write a composite type to the target: %s", error.AsCString());
return false;
}
}
if ((var_sp->m_flags & ClangExpressionVariable::EVIsProgramReference && var_sp->m_live_sp) ||
var_sp->m_flags & ClangExpressionVariable::EVIsLLDBAllocated)
{
// Now write the location of the area into the struct.
Error write_error;
if (!process->WriteScalarToMemory (addr,
var_sp->m_live_sp->GetValue().GetScalar(),
process->GetAddressByteSize(),
write_error))
{
err.SetErrorStringWithFormat ("Couldn't write %s to the target: %s", var_sp->GetName().GetCString(), write_error.AsCString());
return false;
}
if (log)
log->Printf("Materialized %s into 0x%llx", var_sp->GetName().GetCString(), var_sp->m_live_sp->GetValue().GetScalar().ULongLong());
}
else if (!(var_sp->m_flags & ClangExpressionVariable::EVIsProgramReference))
{
err.SetErrorStringWithFormat("Persistent variables without separate allocations are not currently supported.");
return false;
}
}
return true;
}
bool
ClangExpressionDeclMap::DoMaterializeOneVariable
(
bool dematerialize,
const SymbolContext &sym_ctx,
ClangExpressionVariableSP &expr_var,
lldb::addr_t addr,
Error &err
)
{
lldb::LogSP log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_EXPRESSIONS));
Target *target = m_parser_vars->m_exe_ctx.GetTargetPtr();
Process *process = m_parser_vars->m_exe_ctx.GetProcessPtr();
StackFrame *frame = m_parser_vars->m_exe_ctx.GetFramePtr();
if (!frame || !process || !target || !m_parser_vars.get() || !expr_var->m_parser_vars.get())
{
err.SetErrorString("Necessary state for variable materialization isn't present");
return false;
}
// Vital information about the value
const ConstString &name(expr_var->GetName());
TypeFromUser type(expr_var->GetTypeFromUser());
VariableSP &var(expr_var->m_parser_vars->m_lldb_var);
lldb_private::Symbol *sym(expr_var->m_parser_vars->m_lldb_sym);
bool is_reference(expr_var->m_flags & ClangExpressionVariable::EVTypeIsReference);
std::auto_ptr<lldb_private::Value> location_value;
if (var)
{
location_value.reset(GetVariableValue(var,
NULL));
}
else if (sym)
{
addr_t location_load_addr = GetSymbolAddress(*target, name, lldb::eSymbolTypeAny);
if (location_load_addr == LLDB_INVALID_ADDRESS)
{
if (log)
err.SetErrorStringWithFormat ("Couldn't find value for global symbol %s",
name.GetCString());
}
location_value.reset(new Value);
location_value->SetValueType(Value::eValueTypeLoadAddress);
location_value->GetScalar() = location_load_addr;
}
else
{
err.SetErrorStringWithFormat ("Couldn't find %s with appropriate type",
name.GetCString());
return false;
}
if (log)
{
StreamString my_stream_string;
ClangASTType::DumpTypeDescription (type.GetASTContext(),
type.GetOpaqueQualType(),
&my_stream_string);
log->Printf ("%s %s with type %s",
dematerialize ? "Dematerializing" : "Materializing",
name.GetCString(),
my_stream_string.GetString().c_str());
}
if (!location_value.get())
{
err.SetErrorStringWithFormat("Couldn't get value for %s", name.GetCString());
return false;
}
// The size of the type contained in addr
size_t value_bit_size = ClangASTType::GetClangTypeBitWidth(type.GetASTContext(), type.GetOpaqueQualType());
size_t value_byte_size = value_bit_size % 8 ? ((value_bit_size + 8) / 8) : (value_bit_size / 8);
Value::ValueType value_type = location_value->GetValueType();
switch (value_type)
{
default:
{
StreamString ss;
location_value->Dump(&ss);
err.SetErrorStringWithFormat ("%s has a value of unhandled type: %s",
name.GetCString(),
ss.GetString().c_str());
return false;
}
break;
case Value::eValueTypeLoadAddress:
{
if (!dematerialize)
{
Error write_error;
if (is_reference)
{
Error read_error;
addr_t ref_value = process->ReadPointerFromMemory(location_value->GetScalar().ULongLong(), read_error);
if (!read_error.Success())
{
err.SetErrorStringWithFormat ("Couldn't read reference to %s from the target: %s",
name.GetCString(),
read_error.AsCString());
return false;
}
if (!process->WritePointerToMemory(addr,
ref_value,
write_error))
{
err.SetErrorStringWithFormat ("Couldn't write %s to the target: %s",
name.GetCString(),
write_error.AsCString());
return false;
}
}
else
{
if (!process->WriteScalarToMemory (addr,
location_value->GetScalar(),
process->GetAddressByteSize(),
write_error))
{
err.SetErrorStringWithFormat ("Couldn't write %s to the target: %s",
name.GetCString(),
write_error.AsCString());
return false;
}
}
}
}
break;
case Value::eValueTypeScalar:
{
if (location_value->GetContextType() != Value::eContextTypeRegisterInfo)
{
StreamString ss;
location_value->Dump(&ss);
err.SetErrorStringWithFormat ("%s is a scalar of unhandled type: %s",
name.GetCString(),
ss.GetString().c_str());
return false;
}
RegisterInfo *reg_info = location_value->GetRegisterInfo();
if (!reg_info)
{
err.SetErrorStringWithFormat ("Couldn't get the register information for %s",
name.GetCString());
return false;
}
RegisterValue reg_value;
RegisterContext *reg_ctx = m_parser_vars->m_exe_ctx.GetRegisterContext();
if (!reg_ctx)
{
err.SetErrorStringWithFormat ("Couldn't read register context to read %s from %s",
name.GetCString(),
reg_info->name);
return false;
}
uint32_t register_byte_size = reg_info->byte_size;
if (dematerialize)
{
if (is_reference)
return true; // reference types don't need demateralizing
// Get the location of the spare memory area out of the variable's live data.
if (!expr_var->m_live_sp)
{
err.SetErrorStringWithFormat("Couldn't find the memory area used to store %s", name.GetCString());
return false;
}
if (expr_var->m_live_sp->GetValue().GetValueAddressType() != eAddressTypeLoad)
{
err.SetErrorStringWithFormat("The address of the memory area for %s is in an incorrect format", name.GetCString());
return false;
}
Scalar &reg_addr = expr_var->m_live_sp->GetValue().GetScalar();
err = reg_ctx->ReadRegisterValueFromMemory (reg_info,
reg_addr.ULongLong(),
value_byte_size,
reg_value);
if (err.Fail())
return false;
if (!reg_ctx->WriteRegister (reg_info, reg_value))
{
err.SetErrorStringWithFormat ("Couldn't write %s to register %s",
name.GetCString(),
reg_info->name);
return false;
}
// Deallocate the spare area and clear the variable's live data.
Error deallocate_error = process->DeallocateMemory(reg_addr.ULongLong());
if (!deallocate_error.Success())
{
err.SetErrorStringWithFormat ("Couldn't deallocate spare memory area for %s: %s",
name.GetCString(),
deallocate_error.AsCString());
return false;
}
expr_var->m_live_sp.reset();
}
else
{
Error write_error;
RegisterValue reg_value;
if (!reg_ctx->ReadRegister (reg_info, reg_value))
{
err.SetErrorStringWithFormat ("Couldn't read %s from %s",
name.GetCString(),
reg_info->name);
return false;
}
if (is_reference)
{
write_error = reg_ctx->WriteRegisterValueToMemory(reg_info,
addr,
process->GetAddressByteSize(),
reg_value);
if (!write_error.Success())
{
err.SetErrorStringWithFormat ("Couldn't write %s from register %s to the target: %s",
name.GetCString(),
reg_info->name,
write_error.AsCString());
return false;
}
return true;
}
// Allocate a spare memory area to place the register's contents into. This memory area will be pointed to by the slot in the
// struct.
Error allocate_error;
Scalar reg_addr (process->AllocateMemory (value_byte_size,
lldb::ePermissionsReadable | lldb::ePermissionsWritable,
allocate_error));
if (reg_addr.ULongLong() == LLDB_INVALID_ADDRESS)
{
err.SetErrorStringWithFormat ("Couldn't allocate a memory area to store %s: %s",
name.GetCString(),
allocate_error.AsCString());
return false;
}
// Put the location of the spare memory into the live data of the ValueObject.
expr_var->m_live_sp = ValueObjectConstResult::Create (m_parser_vars->m_exe_ctx.GetBestExecutionContextScope(),
type.GetASTContext(),
type.GetOpaqueQualType(),
name,
reg_addr.ULongLong(),
eAddressTypeLoad,
value_byte_size);
// Now write the location of the area into the struct.
if (!process->WriteScalarToMemory (addr,
reg_addr,
process->GetAddressByteSize(),
write_error))
{
err.SetErrorStringWithFormat ("Couldn't write %s to the target: %s",
name.GetCString(),
write_error.AsCString());
return false;
}
if (value_byte_size > register_byte_size)
{
err.SetErrorStringWithFormat ("%s is too big to store in %s",
name.GetCString(),
reg_info->name);
return false;
}
if (!reg_ctx->ReadRegister (reg_info, reg_value))
{
err.SetErrorStringWithFormat ("Couldn't read %s from %s",
name.GetCString(),
reg_info->name);
return false;
}
err = reg_ctx->WriteRegisterValueToMemory (reg_info,
reg_addr.ULongLong(),
value_byte_size,
reg_value);
if (err.Fail())
return false;
}
}
}
return true;
}
bool
ClangExpressionDeclMap::DoMaterializeOneRegister
(
bool dematerialize,
RegisterContext &reg_ctx,
const RegisterInfo &reg_info,
lldb::addr_t addr,
Error &err
)
{
uint32_t register_byte_size = reg_info.byte_size;
RegisterValue reg_value;
if (dematerialize)
{
Error read_error (reg_ctx.ReadRegisterValueFromMemory(&reg_info, addr, register_byte_size, reg_value));
if (read_error.Fail())
{
err.SetErrorStringWithFormat ("Couldn't read %s from the target: %s", reg_info.name, read_error.AsCString());
return false;
}
if (!reg_ctx.WriteRegister (&reg_info, reg_value))
{
err.SetErrorStringWithFormat("Couldn't write register %s (dematerialize)", reg_info.name);
return false;
}
}
else
{
if (!reg_ctx.ReadRegister(&reg_info, reg_value))
{
err.SetErrorStringWithFormat("Couldn't read %s (materialize)", reg_info.name);
return false;
}
Error write_error (reg_ctx.WriteRegisterValueToMemory(&reg_info, addr, register_byte_size, reg_value));
if (write_error.Fail())
{
err.SetErrorStringWithFormat ("Couldn't write %s to the target: %s", reg_info.name, write_error.AsCString());
return false;
}
}
return true;
}
lldb::VariableSP
ClangExpressionDeclMap::FindVariableInScope
(
StackFrame &frame,
const ConstString &name,
TypeFromUser *type,
bool object_pointer
)
{
lldb::LogSP log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_EXPRESSIONS));
ValueObjectSP valobj;
VariableSP var_sp;
Error err;
valobj = frame.GetValueForVariableExpressionPath(name.GetCString(),
eNoDynamicValues,
StackFrame::eExpressionPathOptionCheckPtrVsMember,
var_sp,
err);
if (!err.Success() ||
!var_sp ||
!var_sp->IsInScope(&frame) ||
!var_sp->LocationIsValidForFrame (&frame))
return lldb::VariableSP();
if (var_sp)
{
if (!type)
return var_sp;
TypeFromUser candidate_type(var_sp->GetType()->GetClangFullType(),
var_sp->GetType()->GetClangAST());
if (candidate_type.GetASTContext() != type->GetASTContext())
{
if (log)
log->PutCString("Skipping a candidate variable because of different AST contexts");
return lldb::VariableSP();
}
if (object_pointer)
{
clang::QualType desired_qual_type = clang::QualType::getFromOpaquePtr(type->GetOpaqueQualType());
clang::QualType candidate_qual_type = clang::QualType::getFromOpaquePtr(candidate_type.GetOpaqueQualType());
const clang::ObjCObjectPointerType *desired_objc_ptr_type = desired_qual_type->getAs<clang::ObjCObjectPointerType>();
const clang::ObjCObjectPointerType *candidate_objc_ptr_type = desired_qual_type->getAs<clang::ObjCObjectPointerType>();
if (desired_objc_ptr_type && candidate_objc_ptr_type) {
clang::QualType desired_target_type = desired_objc_ptr_type->getPointeeType().getUnqualifiedType();
clang::QualType candidate_target_type = candidate_objc_ptr_type->getPointeeType().getUnqualifiedType();
if (ClangASTContext::AreTypesSame(type->GetASTContext(),
desired_target_type.getAsOpaquePtr(),
candidate_target_type.getAsOpaquePtr()))
return var_sp;
}
const clang::PointerType *desired_ptr_type = desired_qual_type->getAs<clang::PointerType>();
const clang::PointerType *candidate_ptr_type = candidate_qual_type->getAs<clang::PointerType>();
if (desired_ptr_type && candidate_ptr_type) {
clang::QualType desired_target_type = desired_ptr_type->getPointeeType().getUnqualifiedType();
clang::QualType candidate_target_type = candidate_ptr_type->getPointeeType().getUnqualifiedType();
if (ClangASTContext::AreTypesSame(type->GetASTContext(),
desired_target_type.getAsOpaquePtr(),
candidate_target_type.getAsOpaquePtr()))
return var_sp;
}
return lldb::VariableSP();
}
else
{
if (ClangASTContext::AreTypesSame(type->GetASTContext(),
type->GetOpaqueQualType(),
var_sp->GetType()->GetClangFullType()))
return var_sp;
}
}
return lldb::VariableSP();
}
Symbol *
ClangExpressionDeclMap::FindGlobalDataSymbol
(
Target &target,
const ConstString &name
)
{
SymbolContextList sc_list;
target.GetImages().FindSymbolsWithNameAndType(name,
eSymbolTypeData,
sc_list);
if (sc_list.GetSize())
{
SymbolContext sym_ctx;
sc_list.GetContextAtIndex(0, sym_ctx);
return sym_ctx.symbol;
}
return NULL;
}
lldb::VariableSP
ClangExpressionDeclMap::FindGlobalVariable
(
Target &target,
ModuleSP &module,
const ConstString &name,
ClangNamespaceDecl *namespace_decl,
TypeFromUser *type
)
{
VariableList vars;
if (module && namespace_decl)
module->FindGlobalVariables (name, namespace_decl, true, -1, vars);
else
target.GetImages().FindGlobalVariables(name, true, -1, vars);
if (vars.GetSize())
{
if (type)
{
for (size_t i = 0; i < vars.GetSize(); ++i)
{
VariableSP var_sp = vars.GetVariableAtIndex(i);
if (type->GetASTContext() == var_sp->GetType()->GetClangAST())
{
if (ClangASTContext::AreTypesSame(type->GetASTContext(), type->GetOpaqueQualType(), var_sp->GetType()->GetClangFullType()))
return var_sp;
}
}
}
else
{
return vars.GetVariableAtIndex(0);
}
}
return VariableSP();
}
// Interface for ClangASTSource
void
ClangExpressionDeclMap::FindExternalVisibleDecls (NameSearchContext &context)
{
assert (m_ast_context);
const ConstString name(context.m_decl_name.getAsString().c_str());
lldb::LogSP log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_EXPRESSIONS));
if (GetImportInProgress())
{
if (log && log->GetVerbose())
log->Printf("Ignoring a query during an import");
return;
}
static unsigned int invocation_id = 0;
unsigned int current_id = invocation_id++;
if (log)
{
if (!context.m_decl_context)
log->Printf("ClangExpressionDeclMap::FindExternalVisibleDecls[%u] for '%s' in a NULL DeclContext", current_id, name.GetCString());
else if (const NamedDecl *context_named_decl = dyn_cast<NamedDecl>(context.m_decl_context))
log->Printf("ClangExpressionDeclMap::FindExternalVisibleDecls[%u] for '%s' in '%s'", current_id, name.GetCString(), context_named_decl->getNameAsString().c_str());
else
log->Printf("ClangExpressionDeclMap::FindExternalVisibleDecls[%u] for '%s' in a '%s'", current_id, name.GetCString(), context.m_decl_context->getDeclKindName());
}
if (const NamespaceDecl *namespace_context = dyn_cast<NamespaceDecl>(context.m_decl_context))
{
ClangASTImporter::NamespaceMapSP namespace_map = m_ast_importer->GetNamespaceMap(namespace_context);
if (log && log->GetVerbose())
log->Printf(" CEDM::FEVD[%u] Inspecting (NamespaceMap*)%p (%d entries)",
current_id,
namespace_map.get(),
(int)namespace_map->size());
if (!namespace_map)
return;
for (ClangASTImporter::NamespaceMap::iterator i = namespace_map->begin(), e = namespace_map->end();
i != e;
++i)
{
if (log)
log->Printf(" CEDM::FEVD[%u] Searching namespace %s in module %s",
current_id,
i->second.GetNamespaceDecl()->getNameAsString().c_str(),
i->first->GetFileSpec().GetFilename().GetCString());
FindExternalVisibleDecls(context,
i->first,
i->second,
current_id);
}
}
else if (isa<TranslationUnitDecl>(context.m_decl_context))
{
ClangNamespaceDecl namespace_decl;
if (log)
log->Printf(" CEDM::FEVD[%u] Searching the root namespace", current_id);
FindExternalVisibleDecls(context,
lldb::ModuleSP(),
namespace_decl,
current_id);
}
if (!context.m_found.variable)
ClangASTSource::FindExternalVisibleDecls(context);
}
void
ClangExpressionDeclMap::FindExternalVisibleDecls (NameSearchContext &context,
lldb::ModuleSP module_sp,
ClangNamespaceDecl &namespace_decl,
unsigned int current_id)
{
assert (m_ast_context);
lldb::LogSP log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_EXPRESSIONS));
SymbolContextList sc_list;
const ConstString name(context.m_decl_name.getAsString().c_str());
const char *name_unique_cstr = name.GetCString();
if (name_unique_cstr == NULL)
return;
static ConstString id_name("id");
static ConstString Class_name("Class");
if (name == id_name || name == Class_name)
return;
// Only look for functions by name out in our symbols if the function
// doesn't start with our phony prefix of '$'
Target *target = m_parser_vars->m_exe_ctx.GetTargetPtr();
StackFrame *frame = m_parser_vars->m_exe_ctx.GetFramePtr();
if (name_unique_cstr[0] == '$' && !namespace_decl)
{
static ConstString g_lldb_class_name ("$__lldb_class");
if (name == g_lldb_class_name)
{
// Clang is looking for the type of "this"
if (frame == NULL)
return;
SymbolContext sym_ctx = frame->GetSymbolContext(lldb::eSymbolContextFunction);
if (!sym_ctx.function)
return;
clang::DeclContext *decl_context;
if (sym_ctx.block && sym_ctx.block->GetInlinedFunctionInfo())
decl_context = sym_ctx.block->GetClangDeclContextForInlinedFunction();
else
decl_context = sym_ctx.function->GetClangDeclContext();
if (!decl_context)
return;
clang::CXXMethodDecl *method_decl = llvm::dyn_cast<clang::CXXMethodDecl>(decl_context);
if (!method_decl)
return;
clang::CXXRecordDecl *class_decl = method_decl->getParent();
QualType class_qual_type(class_decl->getTypeForDecl(), 0);
TypeFromUser class_user_type (class_qual_type.getAsOpaquePtr(),
&class_decl->getASTContext());
if (log)
{
ASTDumper ast_dumper(class_qual_type);
log->Printf(" CEDM::FEVD[%u] Adding type for $__lldb_class: %s", current_id, ast_dumper.GetCString());
}
AddOneType(context, class_user_type, current_id, true);
if (method_decl->isInstance())
{
// self is a pointer to the object
QualType class_pointer_type = method_decl->getASTContext().getPointerType(class_qual_type);
TypeFromUser self_user_type(class_pointer_type.getAsOpaquePtr(),
&method_decl->getASTContext());
m_struct_vars->m_object_pointer_type = self_user_type;
}
return;
}
static ConstString g_lldb_objc_class_name ("$__lldb_objc_class");
if (name == g_lldb_objc_class_name)
{
// Clang is looking for the type of "*self"
if (!frame)
return;
SymbolContext sym_ctx = frame->GetSymbolContext(lldb::eSymbolContextFunction);
if (!sym_ctx.function)
return;
clang::DeclContext *decl_context;
if (sym_ctx.block && sym_ctx.block->GetInlinedFunctionInfo())
decl_context = sym_ctx.block->GetClangDeclContextForInlinedFunction();
else
decl_context = sym_ctx.function->GetClangDeclContext();
if (!decl_context)
return;
clang::ObjCMethodDecl *method_decl = llvm::dyn_cast<clang::ObjCMethodDecl>(decl_context);
if (!method_decl)
return;
ObjCInterfaceDecl* self_interface = method_decl->getClassInterface();
if (!self_interface)
return;
const clang::Type *interface_type = self_interface->getTypeForDecl();
TypeFromUser class_user_type(QualType(interface_type, 0).getAsOpaquePtr(),
&method_decl->getASTContext());
if (log)
{
ASTDumper ast_dumper(interface_type);
log->Printf(" FEVD[%u] Adding type for $__lldb_objc_class: %s", current_id, ast_dumper.GetCString());
}
AddOneType(context, class_user_type, current_id, false);
#if 0
VariableList *vars = frame->GetVariableList(false);
lldb::VariableSP self_var = vars->FindVariable(ConstString("self"));
if (self_var &&
self_var->IsInScope(frame) &&
self_var->LocationIsValidForFrame (frame)) {
Type *self_type = self_var->GetType();
if (!self_type)
return;
TypeFromUser self_user_type(self_type->GetClangFullType(),
self_type->GetClangAST());
}
#endif
if (method_decl->isInstanceMethod())
{
// self is a pointer to the object
QualType class_pointer_type = method_decl->getASTContext().getObjCObjectPointerType(QualType(interface_type, 0));
TypeFromUser self_user_type(class_pointer_type.getAsOpaquePtr(),
&method_decl->getASTContext());
m_struct_vars->m_object_pointer_type = self_user_type;
}
else
{
// self is a Class pointer
QualType class_type = method_decl->getASTContext().getObjCClassType();
TypeFromUser self_user_type(class_type.getAsOpaquePtr(),
&method_decl->getASTContext());
m_struct_vars->m_object_pointer_type = self_user_type;
}
return;
}
// any other $__lldb names should be weeded out now
if (!::strncmp(name_unique_cstr, "$__lldb", sizeof("$__lldb") - 1))
return;
do
{
if (!target)
break;
ClangASTContext *scratch_clang_ast_context = target->GetScratchClangASTContext();
if (!scratch_clang_ast_context)
break;
ASTContext *scratch_ast_context = scratch_clang_ast_context->getASTContext();
if (!scratch_ast_context)
break;
TypeDecl *ptype_type_decl = m_parser_vars->m_persistent_vars->GetPersistentType(name);
if (!ptype_type_decl)
break;
Decl *parser_ptype_decl = m_ast_importer->CopyDecl(m_ast_context, scratch_ast_context, ptype_type_decl);
if (!parser_ptype_decl)
break;
TypeDecl *parser_ptype_type_decl = dyn_cast<TypeDecl>(parser_ptype_decl);
if (!parser_ptype_type_decl)
break;
if (log)
log->Printf(" CEDM::FEVD[%u] Found persistent type %s", current_id, name.GetCString());
context.AddNamedDecl(parser_ptype_type_decl);
} while (0);
ClangExpressionVariableSP pvar_sp(m_parser_vars->m_persistent_vars->GetVariable(name));
if (pvar_sp)
{
AddOneVariable(context, pvar_sp, current_id);
return;
}
const char *reg_name(&name.GetCString()[1]);
if (m_parser_vars->m_exe_ctx.GetRegisterContext())
{
const RegisterInfo *reg_info(m_parser_vars->m_exe_ctx.GetRegisterContext()->GetRegisterInfoByName(reg_name));
if (reg_info)
{
if (log)
log->Printf(" CEDM::FEVD[%u] Found register %s", current_id, reg_info->name);
AddOneRegister(context, reg_info, current_id);
}
}
}
else
{
ValueObjectSP valobj;
VariableSP var;
Error err;
if (frame && !namespace_decl)
{
valobj = frame->GetValueForVariableExpressionPath(name_unique_cstr,
eNoDynamicValues,
StackFrame::eExpressionPathOptionCheckPtrVsMember,
var,
err);
// If we found a variable in scope, no need to pull up function names
if (err.Success() && var != NULL)
{
AddOneVariable(context, var, valobj, current_id);
context.m_found.variable = true;
return;
}
}
if (target)
{
var = FindGlobalVariable (*target,
module_sp,
name,
&namespace_decl,
NULL);
if (var)
{
valobj = ValueObjectVariable::Create(target, var);
AddOneVariable(context, var, valobj, current_id);
context.m_found.variable = true;
return;
}
}
if (!context.m_found.variable)
{
const bool include_inlines = false;
const bool append = false;
if (namespace_decl && module_sp)
{
const bool include_symbols = false;
module_sp->FindFunctions(name,
&namespace_decl,
eFunctionNameTypeBase,
include_symbols,
include_inlines,
append,
sc_list);
}
else if (!namespace_decl)
{
const bool include_symbols = true;
target->GetImages().FindFunctions(name,
eFunctionNameTypeBase,
include_symbols,
include_inlines,
append,
sc_list);
}
if (sc_list.GetSize())
{
Symbol *generic_symbol = NULL;
Symbol *non_extern_symbol = NULL;
for (uint32_t index = 0, num_indices = sc_list.GetSize();
index < num_indices;
++index)
{
SymbolContext sym_ctx;
sc_list.GetContextAtIndex(index, sym_ctx);
if (sym_ctx.function)
{
// TODO only do this if it's a C function; C++ functions may be
// overloaded
if (!context.m_found.function_with_type_info)
AddOneFunction(context, sym_ctx.function, NULL, current_id);
context.m_found.function_with_type_info = true;
context.m_found.function = true;
}
else if (sym_ctx.symbol)
{
if (sym_ctx.symbol->IsExternal())
generic_symbol = sym_ctx.symbol;
else
non_extern_symbol = sym_ctx.symbol;
}
}
if (!context.m_found.function_with_type_info)
{
if (generic_symbol)
{
AddOneFunction (context, NULL, generic_symbol, current_id);
context.m_found.function = true;
}
else if (non_extern_symbol)
{
AddOneFunction (context, NULL, non_extern_symbol, current_id);
context.m_found.function = true;
}
}
}
if (!context.m_found.variable && !namespace_decl)
{
// We couldn't find a non-symbol variable for this. Now we'll hunt for a generic
// data symbol, and -- if it is found -- treat it as a variable.
Symbol *data_symbol = FindGlobalDataSymbol(*target, name);
if (data_symbol)
{
AddOneGenericVariable(context, *data_symbol, current_id);
context.m_found.variable = true;
}
}
}
}
}
static clang_type_t
MaybePromoteToBlockPointerType
(
ASTContext *ast_context,
clang_type_t candidate_type
)
{
if (!candidate_type)
return candidate_type;
QualType candidate_qual_type = QualType::getFromOpaquePtr(candidate_type);
const PointerType *candidate_pointer_type = dyn_cast<PointerType>(candidate_qual_type);
if (!candidate_pointer_type)
return candidate_type;
QualType pointee_qual_type = candidate_pointer_type->getPointeeType();
const RecordType *pointee_record_type = dyn_cast<RecordType>(pointee_qual_type);
if (!pointee_record_type)
return candidate_type;
RecordDecl *pointee_record_decl = pointee_record_type->getDecl();
if (!pointee_record_decl->isRecord())
return candidate_type;
if (!pointee_record_decl->getName().startswith(llvm::StringRef("__block_literal_")))
return candidate_type;
QualType generic_function_type = ast_context->getFunctionNoProtoType(ast_context->UnknownAnyTy);
QualType block_pointer_type = ast_context->getBlockPointerType(generic_function_type);
return block_pointer_type.getAsOpaquePtr();
}
Value *
ClangExpressionDeclMap::GetVariableValue
(
VariableSP &var,
ASTContext *parser_ast_context,
TypeFromUser *user_type,
TypeFromParser *parser_type
)
{
lldb::LogSP log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_EXPRESSIONS));
Type *var_type = var->GetType();
if (!var_type)
{
if (log)
log->PutCString("Skipped a definition because it has no type");
return NULL;
}
clang_type_t var_opaque_type = var_type->GetClangFullType();
if (!var_opaque_type)
{
if (log)
log->PutCString("Skipped a definition because it has no Clang type");
return NULL;
}
ASTContext *ast = var_type->GetClangASTContext().getASTContext();
if (!ast)
{
if (log)
log->PutCString("There is no AST context for the current execution context");
return NULL;
}
// commented out because of <rdar://problem/11024417>
//var_opaque_type = MaybePromoteToBlockPointerType (ast, var_opaque_type);
DWARFExpression &var_location_expr = var->LocationExpression();
std::auto_ptr<Value> var_location(new Value);
lldb::addr_t loclist_base_load_addr = LLDB_INVALID_ADDRESS;
Target *target = m_parser_vars->m_exe_ctx.GetTargetPtr();
if (var_location_expr.IsLocationList())
{
SymbolContext var_sc;
var->CalculateSymbolContext (&var_sc);
loclist_base_load_addr = var_sc.function->GetAddressRange().GetBaseAddress().GetLoadAddress (target);
}
Error err;
if (!var_location_expr.Evaluate(&m_parser_vars->m_exe_ctx, ast, NULL, NULL, NULL, loclist_base_load_addr, NULL, *var_location.get(), &err))
{
if (log)
log->Printf("Error evaluating location: %s", err.AsCString());
return NULL;
}
void *type_to_use = NULL;
if (parser_ast_context)
{
type_to_use = GuardedCopyType(parser_ast_context, ast, var_opaque_type);
if (!type_to_use)
{
if (log)
log->Printf("Couldn't copy a variable's type into the parser's AST context");
return NULL;
}
if (parser_type)
*parser_type = TypeFromParser(type_to_use, parser_ast_context);
}
else
type_to_use = var_opaque_type;
if (var_location.get()->GetContextType() == Value::eContextTypeInvalid)
var_location.get()->SetContext(Value::eContextTypeClangType, type_to_use);
if (var_location.get()->GetValueType() == Value::eValueTypeFileAddress)
{
SymbolContext var_sc;
var->CalculateSymbolContext(&var_sc);
if (!var_sc.module_sp)
return NULL;
ObjectFile *object_file = var_sc.module_sp->GetObjectFile();
if (!object_file)
return NULL;
Address so_addr(var_location->GetScalar().ULongLong(), object_file->GetSectionList());
lldb::addr_t load_addr = so_addr.GetLoadAddress(target);
if (load_addr != LLDB_INVALID_ADDRESS)
{
var_location->GetScalar() = load_addr;
var_location->SetValueType(Value::eValueTypeLoadAddress);
}
}
if (user_type)
*user_type = TypeFromUser(var_opaque_type, ast);
return var_location.release();
}
void
ClangExpressionDeclMap::AddOneVariable (NameSearchContext &context, VariableSP var, ValueObjectSP valobj, unsigned int current_id)
{
assert (m_parser_vars.get());
lldb::LogSP log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_EXPRESSIONS));
TypeFromUser ut;
TypeFromParser pt;
Value *var_location = GetVariableValue (var,
m_ast_context,
&ut,
&pt);
clang::QualType parser_opaque_type = QualType::getFromOpaquePtr(pt.GetOpaqueQualType());
if (parser_opaque_type.isNull())
return;
if (const clang::Type *parser_type = parser_opaque_type.getTypePtr())
{
if (const TagType *tag_type = dyn_cast<TagType>(parser_type))
CompleteType(tag_type->getDecl());
}
if (!var_location)
return;
NamedDecl *var_decl;
bool is_reference = ClangASTContext::IsReferenceType(pt.GetOpaqueQualType());
if (is_reference)
var_decl = context.AddVarDecl(pt.GetOpaqueQualType());
else
var_decl = context.AddVarDecl(ClangASTContext::CreateLValueReferenceType(pt.GetASTContext(), pt.GetOpaqueQualType()));
std::string decl_name(context.m_decl_name.getAsString());
ConstString entity_name(decl_name.c_str());
ClangExpressionVariableSP entity(m_found_entities.CreateVariable (valobj));
assert (entity.get());
entity->EnableParserVars();
entity->m_parser_vars->m_parser_type = pt;
entity->m_parser_vars->m_named_decl = var_decl;
entity->m_parser_vars->m_llvm_value = NULL;
entity->m_parser_vars->m_lldb_value = var_location;
entity->m_parser_vars->m_lldb_var = var;
if (is_reference)
entity->m_flags |= ClangExpressionVariable::EVTypeIsReference;
if (log)
{
ASTDumper orig_dumper(ut.GetOpaqueQualType());
ASTDumper ast_dumper(var_decl);
log->Printf(" CEDM::FEVD[%u] Found variable %s, returned %s (original %s)", current_id, decl_name.c_str(), ast_dumper.GetCString(), orig_dumper.GetCString());
}
}
void
ClangExpressionDeclMap::AddOneVariable(NameSearchContext &context,
ClangExpressionVariableSP &pvar_sp,
unsigned int current_id)
{
lldb::LogSP log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_EXPRESSIONS));
TypeFromUser user_type (pvar_sp->GetTypeFromUser());
TypeFromParser parser_type (GuardedCopyType(m_ast_context,
user_type.GetASTContext(),
user_type.GetOpaqueQualType()),
m_ast_context);
if (!parser_type.GetOpaqueQualType())
{
if (log)
log->Printf(" CEDM::FEVD[%u] Couldn't import type for pvar %s", current_id, pvar_sp->GetName().GetCString());
return;
}
NamedDecl *var_decl = context.AddVarDecl(ClangASTContext::CreateLValueReferenceType(parser_type.GetASTContext(), parser_type.GetOpaqueQualType()));
pvar_sp->EnableParserVars();
pvar_sp->m_parser_vars->m_parser_type = parser_type;
pvar_sp->m_parser_vars->m_named_decl = var_decl;
pvar_sp->m_parser_vars->m_llvm_value = NULL;
pvar_sp->m_parser_vars->m_lldb_value = NULL;
if (log)
{
ASTDumper ast_dumper(var_decl);
log->Printf(" CEDM::FEVD[%u] Added pvar %s, returned %s", current_id, pvar_sp->GetName().GetCString(), ast_dumper.GetCString());
}
}
void
ClangExpressionDeclMap::AddOneGenericVariable(NameSearchContext &context,
Symbol &symbol,
unsigned int current_id)
{
assert(m_parser_vars.get());
lldb::LogSP log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_EXPRESSIONS));
Target *target = m_parser_vars->m_exe_ctx.GetTargetPtr();
if (target == NULL)
return;
ASTContext *scratch_ast_context = target->GetScratchClangASTContext()->getASTContext();
TypeFromUser user_type (ClangASTContext::CreateLValueReferenceType(scratch_ast_context, ClangASTContext::GetVoidPtrType(scratch_ast_context, true)),
scratch_ast_context);
TypeFromParser parser_type (ClangASTContext::CreateLValueReferenceType(scratch_ast_context, ClangASTContext::GetVoidPtrType(m_ast_context, true)),
m_ast_context);
NamedDecl *var_decl = context.AddVarDecl(parser_type.GetOpaqueQualType());
std::string decl_name(context.m_decl_name.getAsString());
ConstString entity_name(decl_name.c_str());
ClangExpressionVariableSP entity(m_found_entities.CreateVariable (m_parser_vars->m_exe_ctx.GetBestExecutionContextScope (),
entity_name,
user_type,
m_parser_vars->m_target_info.byte_order,
m_parser_vars->m_target_info.address_byte_size));
assert (entity.get());
std::auto_ptr<Value> symbol_location(new Value);
Address &symbol_address = symbol.GetAddress();
lldb::addr_t symbol_load_addr = symbol_address.GetLoadAddress(target);
symbol_location->SetContext(Value::eContextTypeClangType, user_type.GetOpaqueQualType());
symbol_location->GetScalar() = symbol_load_addr;
symbol_location->SetValueType(Value::eValueTypeLoadAddress);
entity->EnableParserVars();
entity->m_parser_vars->m_parser_type = parser_type;
entity->m_parser_vars->m_named_decl = var_decl;
entity->m_parser_vars->m_llvm_value = NULL;
entity->m_parser_vars->m_lldb_value = symbol_location.release();
entity->m_parser_vars->m_lldb_sym = &symbol;
if (log)
{
ASTDumper ast_dumper(var_decl);
log->Printf(" CEDM::FEVD[%u] Found variable %s, returned %s", current_id, decl_name.c_str(), ast_dumper.GetCString());
}
}
bool
ClangExpressionDeclMap::ResolveUnknownTypes()
{
lldb::LogSP log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_EXPRESSIONS));
Target *target = m_parser_vars->m_exe_ctx.GetTargetPtr();
ASTContext *scratch_ast_context = target->GetScratchClangASTContext()->getASTContext();
for (size_t index = 0, num_entities = m_found_entities.GetSize();
index < num_entities;
++index)
{
ClangExpressionVariableSP entity = m_found_entities.GetVariableAtIndex(index);
if (entity->m_flags & ClangExpressionVariable::EVUnknownType)
{
const NamedDecl *named_decl = entity->m_parser_vars->m_named_decl;
const VarDecl *var_decl = dyn_cast<VarDecl>(named_decl);
if (!var_decl)
{
if (log)
log->Printf("Entity of unknown type does not have a VarDecl");
return false;
}
if (log)
{
ASTDumper ast_dumper(const_cast<VarDecl*>(var_decl));
log->Printf("Variable of unknown type now has Decl %s", ast_dumper.GetCString());
}
QualType var_type = var_decl->getType();
TypeFromParser parser_type(var_type.getAsOpaquePtr(), &var_decl->getASTContext());
lldb::clang_type_t copied_type = m_ast_importer->CopyType(scratch_ast_context, &var_decl->getASTContext(), var_type.getAsOpaquePtr());
if (!copied_type)
{
if (log)
log->Printf("ClangExpressionDeclMap::ResolveUnknownType - Couldn't import the type for a variable");
return lldb::ClangExpressionVariableSP();
}
TypeFromUser user_type(copied_type, scratch_ast_context);
entity->m_parser_vars->m_lldb_value->SetContext(Value::eContextTypeClangType, user_type.GetOpaqueQualType());
entity->m_parser_vars->m_parser_type = parser_type;
entity->SetClangAST(user_type.GetASTContext());
entity->SetClangType(user_type.GetOpaqueQualType());
entity->m_flags &= ~(ClangExpressionVariable::EVUnknownType);
}
}
return true;
}
void
ClangExpressionDeclMap::AddOneRegister (NameSearchContext &context,
const RegisterInfo *reg_info,
unsigned int current_id)
{
lldb::LogSP log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_EXPRESSIONS));
void *ast_type = ClangASTContext::GetBuiltinTypeForEncodingAndBitSize(m_ast_context,
reg_info->encoding,
reg_info->byte_size * 8);
if (!ast_type)
{
if (log)
log->Printf(" Tried to add a type for %s, but couldn't get one", context.m_decl_name.getAsString().c_str());
return;
}
TypeFromParser parser_type (ast_type,
m_ast_context);
NamedDecl *var_decl = context.AddVarDecl(parser_type.GetOpaqueQualType());
ClangExpressionVariableSP entity(m_found_entities.CreateVariable (m_parser_vars->m_exe_ctx.GetBestExecutionContextScope(),
m_parser_vars->m_target_info.byte_order,
m_parser_vars->m_target_info.address_byte_size));
assert (entity.get());
std::string decl_name(context.m_decl_name.getAsString());
entity->SetName (ConstString (decl_name.c_str()));
entity->SetRegisterInfo (reg_info);
entity->EnableParserVars();
entity->m_parser_vars->m_parser_type = parser_type;
entity->m_parser_vars->m_named_decl = var_decl;
entity->m_parser_vars->m_llvm_value = NULL;
entity->m_parser_vars->m_lldb_value = NULL;
entity->m_flags |= ClangExpressionVariable::EVBareRegister;
if (log)
{
ASTDumper ast_dumper(var_decl);
log->Printf(" CEDM::FEVD[%d] Added register %s, returned %s", current_id, context.m_decl_name.getAsString().c_str(), ast_dumper.GetCString());
}
}
void
ClangExpressionDeclMap::AddOneFunction (NameSearchContext &context,
Function* fun,
Symbol* symbol,
unsigned int current_id)
{
assert (m_parser_vars.get());
lldb::LogSP log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_EXPRESSIONS));
NamedDecl *fun_decl = NULL;
std::auto_ptr<Value> fun_location(new Value);
const Address *fun_address = NULL;
// only valid for Functions, not for Symbols
void *fun_opaque_type = NULL;
ASTContext *fun_ast_context = NULL;
if (fun)
{
Type *fun_type = fun->GetType();
if (!fun_type)
{
if (log)
log->PutCString(" Skipped a function because it has no type");
return;
}
fun_opaque_type = fun_type->GetClangFullType();
if (!fun_opaque_type)
{
if (log)
log->PutCString(" Skipped a function because it has no Clang type");
return;
}
fun_address = &fun->GetAddressRange().GetBaseAddress();
fun_ast_context = fun_type->GetClangASTContext().getASTContext();
void *copied_type = GuardedCopyType(m_ast_context, fun_ast_context, fun_opaque_type);
if (copied_type)
{
fun_decl = context.AddFunDecl(copied_type);
}
else
{
// We failed to copy the type we found
if (log)
{
log->Printf (" Failed to import the function type '%s' {0x%8.8llx} into the expression parser AST contenxt",
fun_type->GetName().GetCString(),
fun_type->GetID());
}
return;
}
}
else if (symbol)
{
fun_address = &symbol->GetAddress();
fun_decl = context.AddGenericFunDecl();
}
else
{
if (log)
log->PutCString(" AddOneFunction called with no function and no symbol");
return;
}
Target *target = m_parser_vars->m_exe_ctx.GetTargetPtr();
lldb::addr_t load_addr = fun_address->GetCallableLoadAddress(target);
fun_location->SetValueType(Value::eValueTypeLoadAddress);
fun_location->GetScalar() = load_addr;
ClangExpressionVariableSP entity(m_found_entities.CreateVariable (m_parser_vars->m_exe_ctx.GetBestExecutionContextScope (),
m_parser_vars->m_target_info.byte_order,
m_parser_vars->m_target_info.address_byte_size));
assert (entity.get());
std::string decl_name(context.m_decl_name.getAsString());
entity->SetName(ConstString(decl_name.c_str()));
entity->SetClangType (fun_opaque_type);
entity->SetClangAST (fun_ast_context);
entity->EnableParserVars();
entity->m_parser_vars->m_named_decl = fun_decl;
entity->m_parser_vars->m_llvm_value = NULL;
entity->m_parser_vars->m_lldb_value = fun_location.release();
if (log)
{
ASTDumper ast_dumper(fun_decl);
log->Printf(" CEDM::FEVD[%u] Found %s function %s, returned %s",
current_id,
(fun ? "specific" : "generic"),
decl_name.c_str(),
ast_dumper.GetCString());
}
}
void
ClangExpressionDeclMap::AddOneType(NameSearchContext &context,
TypeFromUser &ut,
unsigned int current_id,
bool add_method)
{
ASTContext *parser_ast_context = m_ast_context;
ASTContext *user_ast_context = ut.GetASTContext();
void *copied_type = GuardedCopyType(parser_ast_context, user_ast_context, ut.GetOpaqueQualType());
if (!copied_type)
{
lldb::LogSP log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_EXPRESSIONS));
if (log)
log->Printf("ClangExpressionDeclMap::AddOneType - Couldn't import the type");
return;
}
if (add_method && ClangASTContext::IsAggregateType(copied_type) && ClangASTContext::GetCompleteType (parser_ast_context, copied_type))
{
void *args[1];
args[0] = ClangASTContext::GetVoidPtrType(parser_ast_context, false);
clang_type_t method_type = ClangASTContext::CreateFunctionType (parser_ast_context,
ClangASTContext::GetBuiltInType_void(parser_ast_context),
args,
1,
false,
ClangASTContext::GetTypeQualifiers(copied_type));
const bool is_virtual = false;
const bool is_static = false;
const bool is_inline = false;
const bool is_explicit = false;
const bool is_attr_used = true;
const bool is_artificial = false;
ClangASTContext::AddMethodToCXXRecordType (parser_ast_context,
copied_type,
"$__lldb_expr",
method_type,
lldb::eAccessPublic,
is_virtual,
is_static,
is_inline,
is_explicit,
is_attr_used,
is_artificial);
}
context.AddTypeDecl(copied_type);
}
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