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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 "lldb/lldb-private.h"
#include "lldb/Core/Address.h"
#include "lldb/Core/Module.h"
#include "lldb/Expression/ClangASTSource.h"
#include "lldb/Symbol/ClangASTContext.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/StackFrame.h"
#include "lldb/Target/ExecutionContext.h"
//#define DEBUG_CEDM
#ifdef DEBUG_CEDM
#define DEBUG_PRINTF(...) fprintf(stderr, __VA_ARGS__)
#else
#define DEBUG_PRINTF(...)
#endif
using namespace lldb_private;
using namespace clang;
ClangExpressionDeclMap::ClangExpressionDeclMap(ExecutionContext *exe_ctx) :
m_exe_ctx(exe_ctx)
{
if (exe_ctx && exe_ctx->frame)
m_sym_ctx = new SymbolContext(exe_ctx->frame->GetSymbolContext(lldb::eSymbolContextEverything));
else
m_sym_ctx = NULL;
}
ClangExpressionDeclMap::~ClangExpressionDeclMap()
{
uint32_t num_tuples = m_tuples.size ();
uint32_t tuple_index;
for (tuple_index = 0; tuple_index < num_tuples; ++tuple_index)
delete m_tuples[tuple_index].m_value;
if (m_sym_ctx)
delete m_sym_ctx;
}
bool
ClangExpressionDeclMap::GetIndexForDecl (uint32_t &index,
const clang::Decl *decl)
{
uint32_t num_tuples = m_tuples.size ();
uint32_t tuple_index;
for (tuple_index = 0; tuple_index < num_tuples; ++tuple_index)
{
if (m_tuples[tuple_index].m_decl == decl)
{
index = tuple_index;
return true;
}
}
return false;
}
// Interface for DwarfExpression
Value
*ClangExpressionDeclMap::GetValueForIndex (uint32_t index)
{
if (index >= m_tuples.size ())
return NULL;
return m_tuples[index].m_value;
}
// Interface for ClangASTSource
void
ClangExpressionDeclMap::GetDecls(NameSearchContext &context,
const char *name)
{
DEBUG_PRINTF("Hunting for a definition for %s\n", name);
// Back out in all cases where we're not fully initialized
if (!m_exe_ctx || !m_exe_ctx->frame || !m_sym_ctx)
return;
Function *function = m_sym_ctx->function;
Block *block = m_sym_ctx->block;
if (!function || !block)
{
DEBUG_PRINTF("function = %p, block = %p\n", function, block);
return;
}
BlockList& blocks = function->GetBlocks(true);
lldb::user_id_t current_block_id = block->GetID();
ConstString name_cs(name);
for (current_block_id = block->GetID();
current_block_id != Block::InvalidID;
current_block_id = blocks.GetParent(current_block_id))
{
Block *current_block = blocks.GetBlockByID(current_block_id);
lldb::VariableListSP var_list = current_block->GetVariableList(false, true);
if (!var_list)
continue;
lldb::VariableSP var = var_list->FindVariable(name_cs);
if (!var)
continue;
AddOneVariable(context, var.get());
return;
}
{
CompileUnit *compile_unit = m_sym_ctx->comp_unit;
if (!compile_unit)
{
DEBUG_PRINTF("compile_unit = %p\n", compile_unit);
return;
}
lldb::VariableListSP var_list = compile_unit->GetVariableList(true);
if (!var_list)
return;
lldb::VariableSP var = var_list->FindVariable(name_cs);
if (!var)
return;
AddOneVariable(context, var.get());
return;
}
}
void
ClangExpressionDeclMap::AddOneVariable(NameSearchContext &context,
Variable* var)
{
Type *var_type = var->GetType();
if (!var_type)
{
DEBUG_PRINTF("Skipped a definition for %s because it has no type\n", name);
return;
}
void *var_opaque_type = var_type->GetOpaqueClangQualType();
if (!var_opaque_type)
{
DEBUG_PRINTF("Skipped a definition for %s because it has no Clang type\n", name);
return;
}
DWARFExpression &var_location_expr = var->LocationExpression();
TypeList *type_list = var_type->GetTypeList();
if (!type_list)
{
DEBUG_PRINTF("Skipped a definition for %s because the type has no associated type list\n", name);
return;
}
clang::ASTContext *exe_ast_ctx = type_list->GetClangASTContext().getASTContext();
if (!exe_ast_ctx)
{
DEBUG_PRINTF("There is no AST context for the current execution context\n");
return;
}
std::auto_ptr<Value> var_location(new Value);
Error err;
if (!var_location_expr.Evaluate(m_exe_ctx, exe_ast_ctx, NULL, *var_location.get(), &err))
{
DEBUG_PRINTF("Error evaluating the location of %s: %s\n", name, err.AsCString());
return;
}
void *copied_type = ClangASTContext::CopyType(context.GetASTContext(), type_list->GetClangASTContext().getASTContext(), var_opaque_type);
if (var_location.get()->GetContextType() == Value::eContextTypeInvalid)
var_location.get()->SetContext(Value::eContextTypeOpaqueClangQualType, copied_type);
if (var_location.get()->GetValueType() == Value::eValueTypeFileAddress)
{
SymbolContext var_sc;
var->CalculateSymbolContext(&var_sc);
if (!var_sc.module_sp)
return;
ObjectFile *object_file = var_sc.module_sp->GetObjectFile();
if (!object_file)
return;
Address so_addr(var_location->GetScalar().ULongLong(), object_file->GetSectionList());
lldb::addr_t load_addr = so_addr.GetLoadAddress(m_exe_ctx->process);
var_location->GetScalar() = load_addr;
var_location->SetValueType(Value::eValueTypeLoadAddress);
}
NamedDecl *var_decl = context.AddVarDecl(copied_type);
Tuple tuple;
tuple.m_decl = var_decl;
tuple.m_value = var_location.release();
m_tuples.push_back(tuple);
DEBUG_PRINTF("Found for a definition for %s\n", name);
}
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