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llvm / llvm-project / a259686db1c5f3f9904f266cbb084a8baeaf86d7 / . / lldb / source / Expression / ClangExpressionDeclMap.cpp
blob: aa45992fe481ec56bb701b823df2978bbae5421a [file] [log] [blame]
//===-- 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/ValueObjectConstResult.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/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"
#include "llvm/Support/raw_ostream.h"
using namespace lldb;
using namespace lldb_private;
using namespace clang;
ClangExpressionDeclMap::ClangExpressionDeclMap (bool keep_result_in_memory) :
m_found_entities (),
m_struct_members (),
m_parser_vars (),
m_struct_vars (),
m_keep_result_in_memory (keep_result_in_memory)
{
EnableStructVars();
}
ClangExpressionDeclMap::~ClangExpressionDeclMap()
{
DidDematerialize();
DisableStructVars();
}
void
ClangExpressionDeclMap::WillParse(ExecutionContext &exe_ctx)
{
EnableParserVars();
m_parser_vars->m_exe_ctx = &exe_ctx;
if (exe_ctx.frame)
m_parser_vars->m_sym_ctx = exe_ctx.frame->GetSymbolContext(lldb::eSymbolContextEverything);
else if (exe_ctx.thread)
m_parser_vars->m_sym_ctx = exe_ctx.thread->GetStackFrameAtIndex(0)->GetSymbolContext(lldb::eSymbolContextEverything);
if (exe_ctx.target)
m_parser_vars->m_persistent_vars = &exe_ctx.target->GetPersistentVariables();
}
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
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());
clang::ASTContext *context(m_parser_vars->m_exe_ctx->target->GetScratchClangASTContext()->getASTContext());
TypeFromUser user_type(ClangASTContext::CopyType(context,
type.GetASTContext(),
type.GetOpaqueQualType()),
context);
if (!m_parser_vars->m_persistent_vars->CreatePersistentVariable (name,
user_type,
m_parser_vars->m_exe_ctx->process->GetByteOrder(),
m_parser_vars->m_exe_ctx->process->GetAddressByteSize()))
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();
ByteOrder byte_order = m_parser_vars->m_exe_ctx->process->GetByteOrder();
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 (off_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 (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;
return pvar_sp;
}
bool
ClangExpressionDeclMap::AddPersistentVariable
(
const clang::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));
clang::ASTContext *context(m_parser_vars->m_exe_ctx->target->GetScratchClangASTContext()->getASTContext());
TypeFromUser user_type(ClangASTContext::CopyType(context,
parser_type.GetASTContext(),
parser_type.GetOpaqueQualType()),
context);
if (!m_parser_vars->m_persistent_vars->CreatePersistentVariable (name,
user_type,
m_parser_vars->m_exe_ctx->process->GetByteOrder(),
m_parser_vars->m_exe_ctx->process->GetAddressByteSize()))
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 clang::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 decl %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 clang::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())
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 clang::NamedDecl *decl,
llvm::Value**& value,
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
value = &entity_sp->m_parser_vars->m_llvm_value;
ptr = entity_sp->m_parser_vars->m_lldb_value->GetScalar().ULongLong();
return true;
}
bool
ClangExpressionDeclMap::GetFunctionAddress
(
const ConstString &name,
uint64_t &ptr
)
{
assert (m_parser_vars.get());
// Back out in all cases where we're not fully initialized
if (m_parser_vars->m_exe_ctx->target == NULL)
return false;
if (!m_parser_vars->m_sym_ctx.target_sp)
return false;
SymbolContextList sc_list;
const bool include_symbols = true;
const bool append = false;
m_parser_vars->m_sym_ctx.FindFunctionsByName(name, include_symbols, append, sc_list);
if (!sc_list.GetSize())
return false;
SymbolContext sym_ctx;
sc_list.GetContextAtIndex(0, sym_ctx);
const Address *fun_address;
if (sym_ctx.function)
fun_address = &sym_ctx.function->GetAddressRange().GetBaseAddress();
else if (sym_ctx.symbol)
fun_address = &sym_ctx.symbol->GetAddressRangeRef().GetBaseAddress();
else
return false;
ptr = fun_address->GetLoadAddress (m_parser_vars->m_exe_ctx->target);
return true;
}
bool
ClangExpressionDeclMap::GetSymbolAddress
(
const ConstString &name,
uint64_t &ptr
)
{
assert (m_parser_vars.get());
// Back out in all cases where we're not fully initialized
if (m_parser_vars->m_exe_ctx->target == NULL)
return false;
SymbolContextList sc_list;
m_parser_vars->m_exe_ctx->target->GetImages().FindSymbolsWithNameAndType(name, lldb::eSymbolTypeAny, sc_list);
if (!sc_list.GetSize())
return false;
SymbolContext sym_ctx;
sc_list.GetContextAtIndex(0, sym_ctx);
const Address *sym_address = &sym_ctx.symbol->GetAddressRangeRef().GetBaseAddress();
ptr = sym_address->GetLoadAddress (m_parser_vars->m_exe_ctx->target);
return true;
}
// Interface for CommandObjectExpression
bool
ClangExpressionDeclMap::Materialize
(
ExecutionContext &exe_ctx,
lldb::addr_t &struct_address,
Error &err
)
{
EnableMaterialVars();
m_material_vars->m_process = exe_ctx.process;
bool result = DoMaterialize(false /* dematerialize */, exe_ctx, NULL, err);
if (result)
struct_address = m_material_vars->m_materialized_location;
return result;
}
bool
ClangExpressionDeclMap::GetObjectPointer
(
lldb::addr_t &object_ptr,
ConstString &object_name,
ExecutionContext &exe_ctx,
Error &err,
bool suppress_type_check
)
{
assert (m_struct_vars.get());
if (!exe_ctx.frame || !exe_ctx.target || !exe_ctx.process)
{
err.SetErrorString("Couldn't load 'this' because the context is incomplete");
return false;
}
if (!m_struct_vars->m_object_pointer_type.GetOpaqueQualType())
{
err.SetErrorString("Couldn't load 'this' because its type is unknown");
return false;
}
Variable *object_ptr_var = FindVariableInScope (*exe_ctx.frame,
object_name,
(suppress_type_check ? NULL : &m_struct_vars->m_object_pointer_type));
if (!object_ptr_var)
{
err.SetErrorStringWithFormat("Couldn't find '%s' with appropriate type in scope", object_name.GetCString());
return false;
}
std::auto_ptr<lldb_private::Value> location_value(GetVariableValue(exe_ctx,
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 = exe_ctx.target->GetArchitecture().GetAddressByteSize();
lldb::ByteOrder address_byte_order = exe_ctx.process->GetByteOrder();
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;
}
DataBufferHeap data;
data.SetByteSize(address_byte_size);
Error read_error;
if (exe_ctx.process->ReadMemory (value_addr, data.GetBytes(), address_byte_size, read_error) != address_byte_size)
{
err.SetErrorStringWithFormat("Coldn't read '%s' from the target: %s", object_name.GetCString(), read_error.AsCString());
return false;
}
DataExtractor extractor(data.GetBytes(), data.GetByteSize(), address_byte_order, address_byte_size);
uint32_t offset = 0;
object_ptr = extractor.GetPointer(&offset);
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;
}
lldb::RegisterInfo *register_info = location_value->GetRegisterInfo();
if (!register_info)
{
err.SetErrorStringWithFormat("Couldn't get the register information for %s", object_name.GetCString());
return false;
}
RegisterContext *register_context = exe_ctx.GetRegisterContext();
if (!register_context)
{
err.SetErrorStringWithFormat("Couldn't read register context to read %s from %s", object_name.GetCString(), register_info->name);
return false;
}
uint32_t register_number = register_info->kinds[lldb::eRegisterKindLLDB];
object_ptr = register_context->ReadRegisterAsUnsigned(register_number, 0x0);
return true;
}
}
}
bool
ClangExpressionDeclMap::Dematerialize
(
ExecutionContext &exe_ctx,
ClangExpressionVariableSP &result_sp,
Error &err
)
{
return DoMaterialize(true, exe_ctx, &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
(
ExecutionContext &exe_ctx,
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;
}
if (!exe_ctx.process)
{
err.SetErrorString("Couldn't find the process");
return false;
}
if (!exe_ctx.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(new DataBufferHeap(m_struct_vars->m_struct_size, 0));
Error error;
if (exe_ctx.process->ReadMemory (m_material_vars->m_materialized_location, data->GetBytes(), data->GetByteSize(), error) != data->GetByteSize())
{
err.SetErrorStringWithFormat ("Couldn't read struct from the target: %s", error.AsCString());
return false;
}
DataExtractor extractor(data, exe_ctx.process->GetByteOrder(), exe_ctx.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,
ExecutionContext &exe_ctx,
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 LLDB_INVALID_ADDRESS;
}
if (!exe_ctx.frame)
{
err.SetErrorString("Received null execution frame");
return LLDB_INVALID_ADDRESS;
}
ClangPersistentVariables &persistent_vars = exe_ctx.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(exe_ctx.frame->GetSymbolContext(lldb::eSymbolContextEverything));
if (!dematerialize)
{
if (m_material_vars->m_materialized_location)
{
exe_ctx.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 = exe_ctx.process->AllocateMemory(m_struct_vars->m_struct_alignment + m_struct_vars->m_struct_size,
lldb::ePermissionsReadable | lldb::ePermissionsWritable,
err);
if (mem == LLDB_INVALID_ADDRESS)
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 = exe_ctx.GetRegisterContext();
if (!reg_ctx)
return false;
if (!DoMaterializeOneRegister (dematerialize,
exe_ctx,
*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())
return false;
if (!DoMaterializeOneVariable (dematerialize,
exe_ctx,
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))
{
bool keep_this_in_memory = false;
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;
keep_this_in_memory = m_keep_result_in_memory;
}
if (!DoMaterializeOnePersistentVariable (dematerialize,
exe_ctx,
member_sp,
m_material_vars->m_materialized_location + member_sp->m_jit_vars->m_offset,
err))
return false;
}
else
{
err.SetErrorStringWithFormat("Unexpected variable %s", member_sp->GetName().GetCString());
return false;
}
}
}
return true;
}
static bool WriteAddressInto
(
ExecutionContext &exe_ctx,
lldb::addr_t target,
lldb::addr_t address,
Error &err
)
{
size_t pointer_byte_size = exe_ctx.process->GetAddressByteSize();
StreamString str (0 | Stream::eBinary,
pointer_byte_size,
exe_ctx.process->GetByteOrder());
switch (pointer_byte_size)
{
default:
assert(!"Unhandled byte size");
case 4:
{
uint32_t address32 = address & 0xffffffffll;
str.PutRawBytes(&address32, sizeof(address32), endian::InlHostByteOrder(), eByteOrderInvalid);
}
break;
case 8:
{
uint64_t address64 = address;
str.PutRawBytes(&address64, sizeof(address64), endian::InlHostByteOrder(), eByteOrderInvalid);
}
break;
}
return (exe_ctx.process->WriteMemory (target, str.GetData(), pointer_byte_size, err) == pointer_byte_size);
}
static lldb::addr_t ReadAddressFrom
(
ExecutionContext &exe_ctx,
lldb::addr_t source,
Error &err
)
{
size_t pointer_byte_size = exe_ctx.process->GetAddressByteSize();
DataBufferHeap *buf = new DataBufferHeap(pointer_byte_size, 0);
DataBufferSP buf_sp(buf);
if (exe_ctx.process->ReadMemory (source, buf->GetBytes(), pointer_byte_size, err) != pointer_byte_size)
return LLDB_INVALID_ADDRESS;
DataExtractor extractor (buf_sp, exe_ctx.process->GetByteOrder(), exe_ctx.process->GetAddressByteSize());
uint32_t offset = 0;
return (lldb::addr_t)extractor.GetPointer(&offset);
}
bool
ClangExpressionDeclMap::DoMaterializeOnePersistentVariable
(
bool dematerialize,
ExecutionContext &exe_ctx,
ClangExpressionVariableSP &var_sp,
lldb::addr_t addr,
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)
return false;
Error error;
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 = ReadAddressFrom(exe_ctx, 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.reset(new lldb_private::ValueObjectConstResult(var_sp->GetTypeFromUser().GetASTContext(),
var_sp->GetTypeFromUser().GetOpaqueQualType(),
var_sp->GetName(),
mem,
lldb::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() != lldb::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
if (log)
log->Printf("Read");
var_sp->ValueUpdated ();
if (exe_ctx.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;
}
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 = exe_ctx.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 = exe_ctx.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.reset(new lldb_private::ValueObjectConstResult(var_sp->GetTypeFromUser().GetASTContext(),
var_sp->GetTypeFromUser().GetOpaqueQualType(),
var_sp->GetName(),
mem,
lldb::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 (exe_ctx.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)
{
mem = var_sp->m_live_sp->GetValue().GetScalar().ULongLong();
// Now write the location of the area into the struct.
Error write_error;
if (!WriteAddressInto(exe_ctx, addr, mem, 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(), (uint64_t)mem);
}
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,
ExecutionContext &exe_ctx,
const SymbolContext &sym_ctx,
ClangExpressionVariableSP &expr_var,
lldb::addr_t addr,
Error &err
)
{
lldb::LogSP log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_EXPRESSIONS));
if (!exe_ctx.frame || !exe_ctx.process)
return false;
// Vital information about the value
const ConstString &name(expr_var->GetName());
TypeFromUser type(expr_var->GetTypeFromUser());
Variable *var = FindVariableInScope (*exe_ctx.frame, name, &type);
if (!var)
{
err.SetErrorStringWithFormat("Couldn't find %s with appropriate type", name.GetCString());
return false;
}
if (log)
log->Printf("%s %s with type %p", (dematerialize ? "Dematerializing" : "Materializing"), name.GetCString(), type.GetOpaqueQualType());
std::auto_ptr<lldb_private::Value> location_value(GetVariableValue(exe_ctx,
var,
NULL));
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)
{
lldb::addr_t value_addr = location_value->GetScalar().ULongLong();
Error error;
if (!WriteAddressInto(exe_ctx,
addr,
value_addr,
error))
{
err.SetErrorStringWithFormat ("Couldn't write %s to the target: %s", name.GetCString(), 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;
}
lldb::addr_t mem; // The address of a spare memory area aused to hold the variable.
lldb::RegisterInfo *register_info = location_value->GetRegisterInfo();
if (!register_info)
{
err.SetErrorStringWithFormat("Couldn't get the register information for %s", name.GetCString());
return false;
}
RegisterContext *register_context = exe_ctx.GetRegisterContext();
if (!register_context)
{
err.SetErrorStringWithFormat("Couldn't read register context to read %s from %s", name.GetCString(), register_info->name);
return false;
}
uint32_t register_number = register_info->kinds[lldb::eRegisterKindLLDB];
uint32_t register_byte_size = register_info->byte_size;
if (dematerialize)
{
// 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() != lldb::eAddressTypeLoad)
{
err.SetErrorStringWithFormat("The address of the memory area for %s is in an incorrect format", name.GetCString());
return false;
}
mem = expr_var->m_live_sp->GetValue().GetScalar().ULongLong();
// Moving from addr into a register
//
// Case 1: addr_byte_size and register_byte_size are the same
//
// |AABBCCDD| Address contents
// |AABBCCDD| Register contents
//
// Case 2: addr_byte_size is bigger than register_byte_size
//
// Error! (The register should always be big enough to hold the data)
//
// Case 3: register_byte_size is bigger than addr_byte_size
//
// |AABB| Address contents
// |AABB0000| Register contents [on little-endian hardware]
// |0000AABB| Register contents [on big-endian hardware]
if (value_byte_size > register_byte_size)
{
err.SetErrorStringWithFormat("%s is too big to store in %s", name.GetCString(), register_info->name);
return false;
}
uint32_t register_offset;
switch (exe_ctx.process->GetByteOrder())
{
default:
err.SetErrorStringWithFormat("%s is stored with an unhandled byte order", name.GetCString());
return false;
case lldb::eByteOrderLittle:
register_offset = 0;
break;
case lldb::eByteOrderBig:
register_offset = register_byte_size - value_byte_size;
break;
}
DataBufferHeap register_data (register_byte_size, 0);
Error error;
if (exe_ctx.process->ReadMemory (mem, register_data.GetBytes() + register_offset, value_byte_size, error) != value_byte_size)
{
err.SetErrorStringWithFormat ("Couldn't read %s from the target: %s", name.GetCString(), error.AsCString());
return false;
}
DataExtractor register_extractor (register_data.GetBytes(), register_byte_size, exe_ctx.process->GetByteOrder(), exe_ctx.process->GetAddressByteSize());
if (!register_context->WriteRegisterBytes(register_number, register_extractor, 0))
{
err.SetErrorStringWithFormat("Couldn't read %s from %s", name.GetCString(), register_info->name);
return false;
}
// Deallocate the spare area and clear the variable's live data.
Error deallocate_error = exe_ctx.process->DeallocateMemory(mem);
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
{
// 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;
mem = exe_ctx.process->AllocateMemory(value_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", 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.reset(new lldb_private::ValueObjectConstResult(type.GetASTContext(),
type.GetOpaqueQualType(),
name,
mem,
lldb::eAddressTypeLoad,
value_byte_size));
// Now write the location of the area into the struct.
Error write_error;
if (!WriteAddressInto(exe_ctx, addr, mem, write_error))
{
err.SetErrorStringWithFormat ("Couldn't write %s to the target: %s", name.GetCString(), write_error.AsCString());
return false;
}
// Moving from a register into addr
//
// Case 1: addr_byte_size and register_byte_size are the same
//
// |AABBCCDD| Register contents
// |AABBCCDD| Address contents
//
// Case 2: addr_byte_size is bigger than register_byte_size
//
// Error! (The register should always be big enough to hold the data)
//
// Case 3: register_byte_size is bigger than addr_byte_size
//
// |AABBCCDD| Register contents
// |AABB| Address contents on little-endian hardware
// |CCDD| Address contents on big-endian hardware
if (value_byte_size > register_byte_size)
{
err.SetErrorStringWithFormat("%s is too big to store in %s", name.GetCString(), register_info->name);
return false;
}
uint32_t register_offset;
switch (exe_ctx.process->GetByteOrder())
{
default:
err.SetErrorStringWithFormat("%s is stored with an unhandled byte order", name.GetCString());
return false;
case lldb::eByteOrderLittle:
register_offset = 0;
break;
case lldb::eByteOrderBig:
register_offset = register_byte_size - value_byte_size;
break;
}
DataExtractor register_extractor;
if (!register_context->ReadRegisterBytes(register_number, register_extractor))
{
err.SetErrorStringWithFormat("Couldn't read %s from %s", name.GetCString(), register_info->name);
return false;
}
const void *register_data = register_extractor.GetData(&register_offset, value_byte_size);
if (!register_data)
{
err.SetErrorStringWithFormat("Read but couldn't extract data for %s from %s", name.GetCString(), register_info->name);
return false;
}
if (exe_ctx.process->WriteMemory (mem, register_data, value_byte_size, write_error) != value_byte_size)
{
err.SetErrorStringWithFormat ("Couldn't write %s to the target: %s", write_error.AsCString());
return false;
}
}
}
}
return true;
}
bool
ClangExpressionDeclMap::DoMaterializeOneRegister
(
bool dematerialize,
ExecutionContext &exe_ctx,
RegisterContext &reg_ctx,
const lldb::RegisterInfo &reg_info,
lldb::addr_t addr,
Error &err
)
{
uint32_t register_number = reg_info.kinds[lldb::eRegisterKindLLDB];
uint32_t register_byte_size = reg_info.byte_size;
if (dematerialize)
{
DataBufferHeap register_data (register_byte_size, 0);
Error read_error;
if (exe_ctx.process->ReadMemory (addr, register_data.GetBytes(), register_byte_size, read_error) != register_byte_size)
{
err.SetErrorStringWithFormat ("Couldn't read %s from the target: %s", reg_info.name, read_error.AsCString());
return false;
}
DataExtractor register_extractor (register_data.GetBytes(), register_byte_size, exe_ctx.process->GetByteOrder(), exe_ctx.process->GetAddressByteSize());
if (!reg_ctx.WriteRegisterBytes(register_number, register_extractor, 0))
{
err.SetErrorStringWithFormat("Couldn't read %s", reg_info.name);
return false;
}
}
else
{
DataExtractor register_extractor;
if (!reg_ctx.ReadRegisterBytes(register_number, register_extractor))
{
err.SetErrorStringWithFormat("Couldn't read %s", reg_info.name);
return false;
}
uint32_t register_offset = 0;
const void *register_data = register_extractor.GetData(&register_offset, register_byte_size);
if (!register_data)
{
err.SetErrorStringWithFormat("Read but couldn't extract data for %s", reg_info.name);
return false;
}
Error error;
if (exe_ctx.process->WriteMemory (addr, register_data, register_byte_size, error) != register_byte_size)
{
err.SetErrorStringWithFormat ("Couldn't write %s to the target: %s", error.AsCString());
return false;
}
}
return true;
}
Variable *
ClangExpressionDeclMap::FindVariableInScope
(
StackFrame &frame,
const ConstString &name,
TypeFromUser *type
)
{
lldb::LogSP log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_EXPRESSIONS));
VariableList *var_list = frame.GetVariableList(true);
if (!var_list)
return NULL;
lldb::VariableSP var_sp (var_list->FindVariable(name));
const bool append = true;
const uint32_t max_matches = 1;
if (!var_sp)
{
// Look for globals elsewhere in the module for the frame
ModuleSP module_sp (frame.GetSymbolContext(eSymbolContextModule).module_sp);
if (module_sp)
{
VariableList module_globals;
if (module_sp->FindGlobalVariables (name, append, max_matches, module_globals))
var_sp = module_globals.GetVariableAtIndex (0);
}
}
if (!var_sp)
{
// Look for globals elsewhere in the program (all images)
TargetSP target_sp (frame.GetSymbolContext(eSymbolContextTarget).target_sp);
if (target_sp)
{
VariableList program_globals;
if (target_sp->GetImages().FindGlobalVariables (name, append, max_matches, program_globals))
var_sp = program_globals.GetVariableAtIndex (0);
}
}
if (var_sp && type)
{
if (type->GetASTContext() == var_sp->GetType()->GetClangAST())
{
if (!ClangASTContext::AreTypesSame(type->GetASTContext(), type->GetOpaqueQualType(), var_sp->GetType()->GetClangFullType()))
return NULL;
}
else
{
if (log)
log->PutCString("Skipping a candidate variable because of different AST contexts");
return NULL;
}
}
return var_sp.get();
}
// Interface for ClangASTSource
void
ClangExpressionDeclMap::GetDecls (NameSearchContext &context, const ConstString &name)
{
assert (m_struct_vars.get());
assert (m_parser_vars.get());
lldb::LogSP log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_EXPRESSIONS));
if (log)
log->Printf("Hunting for a definition for '%s'", name.GetCString());
// Back out in all cases where we're not fully initialized
if (m_parser_vars->m_exe_ctx->frame == NULL)
return;
if (m_parser_vars->m_ignore_lookups)
{
if (log)
log->Printf("Ignoring a query during an import");
return;
}
SymbolContextList sc_list;
const char *name_unique_cstr = name.GetCString();
if (name_unique_cstr == NULL)
return;
// Only look for functions by name out in our symbols if the function
// doesn't start with our phony prefix of '$'
if (name_unique_cstr[0] != '$')
{
Variable *var = FindVariableInScope(*m_parser_vars->m_exe_ctx->frame, name);
// If we found a variable in scope, no need to pull up function names
if (var != NULL)
{
AddOneVariable(context, var);
}
else
{
const bool include_symbols = true;
const bool append = false;
m_parser_vars->m_sym_ctx.FindFunctionsByName (name,
include_symbols,
append,
sc_list);
bool found_specific = false;
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 (!found_specific)
AddOneFunction(context, sym_ctx.function, NULL);
found_specific = true;
}
else if (sym_ctx.symbol)
{
if (sym_ctx.symbol->IsExternal())
generic_symbol = sym_ctx.symbol;
else
non_extern_symbol = sym_ctx.symbol;
}
}
if (!found_specific)
{
if (generic_symbol)
AddOneFunction (context, NULL, generic_symbol);
else if (non_extern_symbol)
AddOneFunction (context, NULL, non_extern_symbol);
}
ClangNamespaceDecl namespace_decl (m_parser_vars->m_sym_ctx.FindNamespace(name));
if (namespace_decl)
{
clang::NamespaceDecl *clang_namespace_decl = AddNamespace(context, namespace_decl);
if (clang_namespace_decl)
clang_namespace_decl->setHasExternalLexicalStorage();
}
}
}
else
{
static ConstString g_lldb_class_name ("$__lldb_class");
if (name == g_lldb_class_name)
{
// Clang is looking for the type of "this"
VariableList *vars = m_parser_vars->m_exe_ctx->frame->GetVariableList(false);
if (!vars)
return;
lldb::VariableSP this_var = vars->FindVariable(ConstString("this"));
if (!this_var)
return;
Type *this_type = this_var->GetType();
if (!this_type)
return;
if (log)
{
log->PutCString ("Type for \"this\" is: ");
StreamString strm;
this_type->Dump(&strm, true);
log->PutCString (strm.GetData());
}
TypeFromUser this_user_type(this_type->GetClangFullType(),
this_type->GetClangAST());
m_struct_vars->m_object_pointer_type = this_user_type;
void *pointer_target_type;
if (!ClangASTContext::IsPointerType(this_user_type.GetOpaqueQualType(),
&pointer_target_type))
return;
TypeFromUser class_user_type(pointer_target_type,
this_type->GetClangAST());
if (log)
{
StreamString type_stream;
class_user_type.DumpTypeCode(&type_stream);
type_stream.Flush();
log->Printf("Adding type for $__lldb_class: %s", type_stream.GetString().c_str());
}
AddOneType(context, class_user_type, true);
return;
}
static ConstString g_lldb_objc_class_name ("$__lldb_objc_class");
if (name == g_lldb_objc_class_name)
{
// Clang is looking for the type of "*self"
VariableList *vars = m_parser_vars->m_exe_ctx->frame->GetVariableList(false);
if (!vars)
return;
lldb::VariableSP self_var = vars->FindVariable(ConstString("self"));
if (!self_var)
return;
Type *self_type = self_var->GetType();
if (!self_type)
return;
TypeFromUser self_user_type(self_type->GetClangFullType(),
self_type->GetClangAST());
m_struct_vars->m_object_pointer_type = self_user_type;
void *pointer_target_type;
if (!ClangASTContext::IsPointerType(self_user_type.GetOpaqueQualType(),
&pointer_target_type))
return;
TypeFromUser class_user_type(pointer_target_type,
self_type->GetClangAST());
if (log)
{
StreamString type_stream;
class_user_type.DumpTypeCode(&type_stream);
type_stream.Flush();
log->Printf("Adding type for $__lldb_objc_class: %s", type_stream.GetString().c_str());
}
AddOneType(context, class_user_type, false);
return;
}
ClangExpressionVariableSP pvar_sp(m_parser_vars->m_persistent_vars->GetVariable(name));
if (pvar_sp)
{
AddOneVariable(context, pvar_sp);
return;
}
const char *reg_name(&name.GetCString()[1]);
if (m_parser_vars->m_exe_ctx->GetRegisterContext())
{
const lldb::RegisterInfo *reg_info(m_parser_vars->m_exe_ctx->GetRegisterContext()->GetRegisterInfoByName(reg_name));
if (reg_info)
AddOneRegister(context, reg_info);
}
}
lldb::TypeSP type_sp (m_parser_vars->m_sym_ctx.FindTypeByName (name));
if (type_sp)
{
if (log)
{
log->Printf ("Matching type found for \"%s\": ", name.GetCString());
StreamString strm;
type_sp->Dump(&strm, true);
log->PutCString (strm.GetData());
}
TypeFromUser user_type (type_sp->GetClangFullType(),
type_sp->GetClangAST());
AddOneType(context, user_type, false);
}
}
Value *
ClangExpressionDeclMap::GetVariableValue
(
ExecutionContext &exe_ctx,
Variable *var,
clang::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;
}
clang::ASTContext *ast = var_type->GetClangASTContext().getASTContext();
if (!ast)
{
if (log)
log->PutCString("There is no AST context for the current execution context");
return NULL;
}
DWARFExpression &var_location_expr = var->LocationExpression();
std::auto_ptr<Value> var_location(new Value);
lldb::addr_t loclist_base_load_addr = LLDB_INVALID_ADDRESS;
if (var_location_expr.IsLocationList())
{
SymbolContext var_sc;
var->CalculateSymbolContext (&var_sc);
loclist_base_load_addr = var_sc.function->GetAddressRange().GetBaseAddress().GetLoadAddress (exe_ctx.target);
}
Error err;
if (!var_location_expr.Evaluate(&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;
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(exe_ctx.target);
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, Variable* var)
{
assert (m_parser_vars.get());
lldb::LogSP log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_EXPRESSIONS));
TypeFromUser ut;
TypeFromParser pt;
Value *var_location = GetVariableValue (*m_parser_vars->m_exe_ctx,
var,
context.GetASTContext(),
&ut,
&pt);
if (!var_location)
return;
NamedDecl *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 (entity_name,
ut,
m_parser_vars->m_exe_ctx->process->GetByteOrder(),
m_parser_vars->m_exe_ctx->process->GetAddressByteSize()));
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;
if (log)
{
std::string var_decl_print_string;
llvm::raw_string_ostream var_decl_print_stream(var_decl_print_string);
var_decl->print(var_decl_print_stream);
var_decl_print_stream.flush();
log->Printf("Found variable %s, returned %s", decl_name.c_str(), var_decl_print_string.c_str());
if (log->GetVerbose())
{
StreamString var_decl_dump_string;
ASTDumper::DumpDecl(var_decl_dump_string, var_decl);
log->Printf("%s\n", var_decl_dump_string.GetData());
}
}
}
void
ClangExpressionDeclMap::AddOneVariable(NameSearchContext &context,
ClangExpressionVariableSP &pvar_sp)
{
lldb::LogSP log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_EXPRESSIONS));
TypeFromUser user_type (pvar_sp->GetTypeFromUser());
TypeFromParser parser_type (GuardedCopyType(context.GetASTContext(),
user_type.GetASTContext(),
user_type.GetOpaqueQualType()),
context.GetASTContext());
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)
{
std::string var_decl_print_string;
llvm::raw_string_ostream var_decl_print_stream(var_decl_print_string);
var_decl->print(var_decl_print_stream);
var_decl_print_stream.flush();
log->Printf("Added pvar %s, returned %s", pvar_sp->GetName().GetCString(), var_decl_print_string.c_str());
}
}
void
ClangExpressionDeclMap::AddOneRegister (NameSearchContext &context,
const RegisterInfo *reg_info)
{
lldb::LogSP log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_EXPRESSIONS));
void *ast_type = ClangASTContext::GetBuiltinTypeForEncodingAndBitSize(context.GetASTContext(),
reg_info->encoding,
reg_info->byte_size * 8);
if (!ast_type)
{
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,
context.GetASTContext());
NamedDecl *var_decl = context.AddVarDecl(parser_type.GetOpaqueQualType());
ClangExpressionVariableSP entity(m_found_entities.CreateVariable (m_parser_vars->m_exe_ctx->process->GetByteOrder(),
m_parser_vars->m_exe_ctx->process->GetAddressByteSize()));
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;
if (log)
{
std::string var_decl_print_string;
llvm::raw_string_ostream var_decl_print_stream(var_decl_print_string);
var_decl->print(var_decl_print_stream);
var_decl_print_stream.flush();
log->Printf("Added register %s, returned %s", context.m_decl_name.getAsString().c_str(), var_decl_print_string.c_str());
}
}
clang::NamespaceDecl *
ClangExpressionDeclMap::AddNamespace (NameSearchContext &context, const ClangNamespaceDecl &namespace_decl)
{
lldb::LogSP log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_EXPRESSIONS));
clang::Decl *copied_decl = ClangASTContext::CopyDecl (context.GetASTContext(),
namespace_decl.GetASTContext(),
namespace_decl.GetNamespaceDecl());
return dyn_cast<clang::NamespaceDecl>(copied_decl);
}
void
ClangExpressionDeclMap::AddOneFunction(NameSearchContext &context,
Function* fun,
Symbol* symbol)
{
assert (m_parser_vars.get());
lldb::LogSP log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_EXPRESSIONS));
NamedDecl *fun_decl;
std::auto_ptr<Value> fun_location(new Value);
const Address *fun_address;
// only valid for Functions, not for Symbols
void *fun_opaque_type = NULL;
clang::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(context.GetASTContext(), fun_ast_context, fun_opaque_type);
fun_decl = context.AddFunDecl(copied_type);
}
else if (symbol)
{
fun_address = &symbol->GetAddressRangeRef().GetBaseAddress();
fun_decl = context.AddGenericFunDecl();
}
else
{
if (log)
log->PutCString("AddOneFunction called with no function and no symbol");
return;
}
lldb::addr_t load_addr = fun_address->GetLoadAddress(m_parser_vars->m_exe_ctx->target);
fun_location->SetValueType(Value::eValueTypeLoadAddress);
fun_location->GetScalar() = load_addr;
ClangExpressionVariableSP entity(m_found_entities.CreateVariable (m_parser_vars->m_exe_ctx->process->GetByteOrder(),
m_parser_vars->m_exe_ctx->process->GetAddressByteSize()));
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)
{
std::string fun_decl_print_string;
llvm::raw_string_ostream fun_decl_print_stream(fun_decl_print_string);
fun_decl->print(fun_decl_print_stream);
fun_decl_print_stream.flush();
log->Printf("Found %s function %s, returned %s", (fun ? "specific" : "generic"), decl_name.c_str(), fun_decl_print_string.c_str());
}
}
void
ClangExpressionDeclMap::AddOneType(NameSearchContext &context,
TypeFromUser &ut,
bool add_method)
{
clang::ASTContext *parser_ast_context = context.GetASTContext();
clang::ASTContext *user_ast_context = ut.GetASTContext();
void *copied_type = GuardedCopyType(parser_ast_context, user_ast_context, ut.GetOpaqueQualType());
TypeFromParser parser_type(copied_type, parser_ast_context);
if (add_method && ClangASTContext::IsAggregateType(copied_type))
{
void *args[1];
args[0] = ClangASTContext::GetVoidPtrType(parser_ast_context, false);
void *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;
ClangASTContext::AddMethodToCXXRecordType (parser_ast_context,
copied_type,
"$__lldb_expr",
method_type,
lldb::eAccessPublic,
is_virtual,
is_static,
is_inline,
is_explicit);
}
context.AddTypeDecl(copied_type);
}
void *
ClangExpressionDeclMap::GuardedCopyType (ASTContext *dest_context,
ASTContext *source_context,
void *clang_type)
{
assert (m_parser_vars.get());
m_parser_vars->m_ignore_lookups = true;
void *ret = ClangASTContext::CopyType (dest_context,
source_context,
clang_type);
m_parser_vars->m_ignore_lookups = false;
return ret;
}