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llvm-project/lldb/source/Plugins/ExpressionParser/Clang/ClangExpressionDeclMap.cpp

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//===-- ClangExpressionDeclMap.cpp ----------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "ClangExpressionDeclMap.h"
#include "ClangASTSource.h"
#include "ClangModulesDeclVendor.h"
#include "ClangPersistentVariables.h"
#include "ClangUtil.h"
#include "Plugins/TypeSystem/Clang/TypeSystemClang.h"
#include "lldb/Core/Address.h"
#include "lldb/Core/Module.h"
#include "lldb/Core/ModuleSpec.h"
#include "lldb/Core/ValueObjectConstResult.h"
#include "lldb/Core/ValueObjectVariable.h"
#include "lldb/Expression/Materializer.h"
#include "lldb/Symbol/CompileUnit.h"
#include "lldb/Symbol/CompilerDecl.h"
#include "lldb/Symbol/CompilerDeclContext.h"
#include "lldb/Symbol/Function.h"
#include "lldb/Symbol/ObjectFile.h"
#include "lldb/Symbol/SymbolContext.h"
#include "lldb/Symbol/SymbolFile.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"
#include "lldb/Utility/Endian.h"
#include "lldb/Utility/Log.h"
#include "lldb/Utility/RegisterValue.h"
#include "lldb/Utility/Status.h"
#include "lldb/lldb-private.h"
#include "clang/AST/ASTConsumer.h"
#include "clang/AST/ASTContext.h"
#include "clang/AST/ASTImporter.h"
#include "clang/AST/Decl.h"
#include "clang/AST/DeclarationName.h"
#include "clang/AST/RecursiveASTVisitor.h"
#include "Plugins/Language/CPlusPlus/CPlusPlusLanguage.h"
#include "Plugins/LanguageRuntime/CPlusPlus/CPPLanguageRuntime.h"
#include "Plugins/LanguageRuntime/ObjC/ObjCLanguageRuntime.h"
using namespace lldb;
using namespace lldb_private;
using namespace clang;
namespace {
const char *g_lldb_local_vars_namespace_cstr = "$__lldb_local_vars";
} // anonymous namespace
ClangExpressionDeclMap::ClangExpressionDeclMap(
bool keep_result_in_memory,
Materializer::PersistentVariableDelegate *result_delegate,
const lldb::TargetSP &target,
const std::shared_ptr<ClangASTImporter> &importer, ValueObject *ctx_obj)
: ClangASTSource(target, importer), m_found_entities(), m_struct_members(),
m_keep_result_in_memory(keep_result_in_memory),
m_result_delegate(result_delegate), m_ctx_obj(ctx_obj), 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();
DisableStructVars();
}
bool ClangExpressionDeclMap::WillParse(ExecutionContext &exe_ctx,
Materializer *materializer) {
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() &&
exe_ctx.GetThreadPtr()->GetStackFrameAtIndex(0))
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(true);
m_parser_vars->m_sym_ctx.target_sp = exe_ctx.GetTargetSP();
} else if (target) {
m_parser_vars->m_sym_ctx.Clear(true);
m_parser_vars->m_sym_ctx.target_sp = exe_ctx.GetTargetSP();
}
if (target) {
m_parser_vars->m_persistent_vars = llvm::cast<ClangPersistentVariables>(
target->GetPersistentExpressionStateForLanguage(eLanguageTypeC));
if (!TypeSystemClang::GetScratch(*target))
return false;
}
m_parser_vars->m_target_info = GetTargetInfo();
m_parser_vars->m_materializer = materializer;
return true;
}
void ClangExpressionDeclMap::InstallCodeGenerator(
clang::ASTConsumer *code_gen) {
assert(m_parser_vars);
m_parser_vars->m_code_gen = code_gen;
}
void ClangExpressionDeclMap::DidParse() {
if (m_parser_vars && m_parser_vars->m_persistent_vars) {
for (size_t entity_index = 0, num_entities = m_found_entities.GetSize();
entity_index < num_entities; ++entity_index) {
ExpressionVariableSP var_sp(
m_found_entities.GetVariableAtIndex(entity_index));
if (var_sp)
llvm::cast<ClangExpressionVariable>(var_sp.get())
->DisableParserVars(GetParserID());
}
for (size_t pvar_index = 0,
num_pvars = m_parser_vars->m_persistent_vars->GetSize();
pvar_index < num_pvars; ++pvar_index) {
ExpressionVariableSP pvar_sp(
m_parser_vars->m_persistent_vars->GetVariableAtIndex(pvar_index));
if (ClangExpressionVariable *clang_var =
llvm::dyn_cast<ClangExpressionVariable>(pvar_sp.get()))
clang_var->DisableParserVars(GetParserID());
}
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;
}
TypeFromUser ClangExpressionDeclMap::DeportType(TypeSystemClang &target,
TypeSystemClang &source,
TypeFromParser parser_type) {
assert(&target == TypeSystemClang::GetScratch(*m_target));
assert((TypeSystem *)&source == parser_type.GetTypeSystem());
assert(&source.getASTContext() == m_ast_context);
return TypeFromUser(m_ast_importer_sp->DeportType(target, parser_type));
}
bool ClangExpressionDeclMap::AddPersistentVariable(const NamedDecl *decl,
ConstString name,
TypeFromParser parser_type,
bool is_result,
bool is_lvalue) {
assert(m_parser_vars.get());
TypeSystemClang *ast =
llvm::dyn_cast_or_null<TypeSystemClang>(parser_type.GetTypeSystem());
if (ast == nullptr)
return false;
if (m_parser_vars->m_materializer && is_result) {
Status err;
ExecutionContext &exe_ctx = m_parser_vars->m_exe_ctx;
Target *target = exe_ctx.GetTargetPtr();
if (target == nullptr)
return false;
auto *clang_ast_context = TypeSystemClang::GetScratch(*target);
if (!clang_ast_context)
return false;
TypeFromUser user_type = DeportType(*clang_ast_context, *ast, parser_type);
uint32_t offset = m_parser_vars->m_materializer->AddResultVariable(
user_type, is_lvalue, m_keep_result_in_memory, m_result_delegate, err);
ClangExpressionVariable *var = new ClangExpressionVariable(
exe_ctx.GetBestExecutionContextScope(), name, user_type,
m_parser_vars->m_target_info.byte_order,
m_parser_vars->m_target_info.address_byte_size);
m_found_entities.AddNewlyConstructedVariable(var);
var->EnableParserVars(GetParserID());
ClangExpressionVariable::ParserVars *parser_vars =
var->GetParserVars(GetParserID());
parser_vars->m_named_decl = decl;
var->EnableJITVars(GetParserID());
ClangExpressionVariable::JITVars *jit_vars = var->GetJITVars(GetParserID());
jit_vars->m_offset = offset;
return true;
}
Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS));
ExecutionContext &exe_ctx = m_parser_vars->m_exe_ctx;
Target *target = exe_ctx.GetTargetPtr();
if (target == nullptr)
return false;
TypeSystemClang *context = TypeSystemClang::GetScratch(*target);
if (!context)
return false;
TypeFromUser user_type = DeportType(*context, *ast, parser_type);
if (!user_type.GetOpaqueQualType()) {
LLDB_LOG(log, "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)
return false;
ClangExpressionVariable *var = llvm::cast<ClangExpressionVariable>(
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)
.get());
if (!var)
return false;
var->m_frozen_sp->SetHasCompleteType();
if (is_result)
var->m_flags |= ClangExpressionVariable::EVNeedsFreezeDry;
else
var->m_flags |=
ClangExpressionVariable::EVKeepInTarget; // explicitly-declared
// persistent variables should
// persist
if (is_lvalue) {
var->m_flags |= ClangExpressionVariable::EVIsProgramReference;
} else {
var->m_flags |= ClangExpressionVariable::EVIsLLDBAllocated;
var->m_flags |= ClangExpressionVariable::EVNeedsAllocation;
}
if (m_keep_result_in_memory) {
var->m_flags |= ClangExpressionVariable::EVKeepInTarget;
}
LLDB_LOG(log, "Created persistent variable with flags {0:x}", var->m_flags);
var->EnableParserVars(GetParserID());
ClangExpressionVariable::ParserVars *parser_vars =
var->GetParserVars(GetParserID());
parser_vars->m_named_decl = decl;
return true;
}
bool ClangExpressionDeclMap::AddValueToStruct(const NamedDecl *decl,
ConstString name,
llvm::Value *value, size_t size,
lldb::offset_t alignment) {
assert(m_struct_vars.get());
assert(m_parser_vars.get());
bool is_persistent_variable = false;
Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS));
m_struct_vars->m_struct_laid_out = false;
if (ClangExpressionVariable::FindVariableInList(m_struct_members, decl,
GetParserID()))
return true;
ClangExpressionVariable *var(ClangExpressionVariable::FindVariableInList(
m_found_entities, decl, GetParserID()));
if (!var && m_parser_vars->m_persistent_vars) {
var = ClangExpressionVariable::FindVariableInList(
*m_parser_vars->m_persistent_vars, decl, GetParserID());
is_persistent_variable = true;
}
if (!var)
return false;
LLDB_LOG(log, "Adding value for (NamedDecl*)%p [%s - %s] to the structure",
decl, name, var->GetName());
// We know entity->m_parser_vars is valid because we used a parser variable
// to find it
ClangExpressionVariable::ParserVars *parser_vars =
llvm::cast<ClangExpressionVariable>(var)->GetParserVars(GetParserID());
parser_vars->m_llvm_value = value;
if (ClangExpressionVariable::JITVars *jit_vars =
llvm::cast<ClangExpressionVariable>(var)->GetJITVars(GetParserID())) {
// We already laid this out; do not touch
LLDB_LOG(log, "Already placed at {0:x}", jit_vars->m_offset);
}
llvm::cast<ClangExpressionVariable>(var)->EnableJITVars(GetParserID());
ClangExpressionVariable::JITVars *jit_vars =
llvm::cast<ClangExpressionVariable>(var)->GetJITVars(GetParserID());
jit_vars->m_alignment = alignment;
jit_vars->m_size = size;
m_struct_members.AddVariable(var->shared_from_this());
if (m_parser_vars->m_materializer) {
uint32_t offset = 0;
Status err;
if (is_persistent_variable) {
ExpressionVariableSP var_sp(var->shared_from_this());
offset = m_parser_vars->m_materializer->AddPersistentVariable(
var_sp, nullptr, err);
} else {
if (const lldb_private::Symbol *sym = parser_vars->m_lldb_sym)
offset = m_parser_vars->m_materializer->AddSymbol(*sym, err);
else if (const RegisterInfo *reg_info = var->GetRegisterInfo())
offset = m_parser_vars->m_materializer->AddRegister(*reg_info, err);
else if (parser_vars->m_lldb_var)
offset = m_parser_vars->m_materializer->AddVariable(
parser_vars->m_lldb_var, err);
}
if (!err.Success())
return false;
LLDB_LOG(log, "Placed at {0:x}", offset);
jit_vars->m_offset =
offset; // TODO DoStructLayout() should not change this.
}
return true;
}
bool ClangExpressionDeclMap::DoStructLayout() {
assert(m_struct_vars.get());
if (m_struct_vars->m_struct_laid_out)
return true;
if (!m_parser_vars->m_materializer)
return false;
m_struct_vars->m_struct_alignment =
m_parser_vars->m_materializer->GetStructAlignment();
m_struct_vars->m_struct_size =
m_parser_vars->m_materializer->GetStructByteSize();
m_struct_vars->m_struct_laid_out = true;
return true;
}
bool ClangExpressionDeclMap::GetStructInfo(uint32_t &num_elements, size_t &size,
lldb::offset_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,
lldb::offset_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;
ExpressionVariableSP member_sp(m_struct_members.GetVariableAtIndex(index));
if (!member_sp)
return false;
ClangExpressionVariable::ParserVars *parser_vars =
llvm::cast<ClangExpressionVariable>(member_sp.get())
->GetParserVars(GetParserID());
ClangExpressionVariable::JITVars *jit_vars =
llvm::cast<ClangExpressionVariable>(member_sp.get())
->GetJITVars(GetParserID());
if (!parser_vars || !jit_vars || !member_sp->GetValueObject())
return false;
decl = parser_vars->m_named_decl;
value = parser_vars->m_llvm_value;
offset = jit_vars->m_offset;
name = member_sp->GetName();
return true;
}
bool ClangExpressionDeclMap::GetFunctionInfo(const NamedDecl *decl,
uint64_t &ptr) {
ClangExpressionVariable *entity(ClangExpressionVariable::FindVariableInList(
m_found_entities, decl, GetParserID()));
if (!entity)
return false;
// We know m_parser_vars is valid since we searched for the variable by its
// NamedDecl
ClangExpressionVariable::ParserVars *parser_vars =
entity->GetParserVars(GetParserID());
ptr = parser_vars->m_lldb_value.GetScalar().ULongLong();
return true;
}
addr_t ClangExpressionDeclMap::GetSymbolAddress(Target &target,
Process *process,
ConstString name,
lldb::SymbolType symbol_type,
lldb_private::Module *module) {
SymbolContextList sc_list;
if (module)
module->FindSymbolsWithNameAndType(name, symbol_type, sc_list);
else
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.IsValid())
continue;
switch (sym_ctx.symbol->GetType()) {
case eSymbolTypeCode:
case eSymbolTypeTrampoline:
symbol_load_addr = sym_address.GetCallableLoadAddress(&target);
break;
case eSymbolTypeResolver:
symbol_load_addr = sym_address.GetCallableLoadAddress(&target, true);
break;
case eSymbolTypeReExported: {
ConstString reexport_name = sym_ctx.symbol->GetReExportedSymbolName();
if (reexport_name) {
ModuleSP reexport_module_sp;
ModuleSpec reexport_module_spec;
reexport_module_spec.GetPlatformFileSpec() =
sym_ctx.symbol->GetReExportedSymbolSharedLibrary();
if (reexport_module_spec.GetPlatformFileSpec()) {
reexport_module_sp =
target.GetImages().FindFirstModule(reexport_module_spec);
if (!reexport_module_sp) {
reexport_module_spec.GetPlatformFileSpec().GetDirectory().Clear();
reexport_module_sp =
target.GetImages().FindFirstModule(reexport_module_spec);
}
}
symbol_load_addr = GetSymbolAddress(
target, process, sym_ctx.symbol->GetReExportedSymbolName(),
symbol_type, reexport_module_sp.get());
}
} 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;
}
}
if (symbol_load_addr == LLDB_INVALID_ADDRESS && process) {
ObjCLanguageRuntime *runtime = ObjCLanguageRuntime::Get(*process);
if (runtime) {
symbol_load_addr = runtime->LookupRuntimeSymbol(name);
}
}
return symbol_load_addr;
}
addr_t ClangExpressionDeclMap::GetSymbolAddress(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(),
m_parser_vars->m_exe_ctx.GetProcessPtr(), name,
symbol_type);
}
lldb::VariableSP ClangExpressionDeclMap::FindGlobalVariable(
Target &target, ModuleSP &module, ConstString name,
const CompilerDeclContext &namespace_decl) {
VariableList vars;
if (module && namespace_decl)
module->FindGlobalVariables(name, namespace_decl, -1, vars);
else
target.GetImages().FindGlobalVariables(name, -1, vars);
if (vars.GetSize() == 0)
return VariableSP();
return vars.GetVariableAtIndex(0);
}
TypeSystemClang *ClangExpressionDeclMap::GetTypeSystemClang() {
StackFrame *frame = m_parser_vars->m_exe_ctx.GetFramePtr();
if (frame == nullptr)
return nullptr;
SymbolContext sym_ctx = frame->GetSymbolContext(lldb::eSymbolContextFunction |
lldb::eSymbolContextBlock);
if (sym_ctx.block == nullptr)
return nullptr;
CompilerDeclContext frame_decl_context = sym_ctx.block->GetDeclContext();
if (!frame_decl_context)
return nullptr;
return llvm::dyn_cast_or_null<TypeSystemClang>(
frame_decl_context.GetTypeSystem());
}
// Interface for ClangASTSource
void ClangExpressionDeclMap::FindExternalVisibleDecls(
NameSearchContext &context) {
assert(m_ast_context);
const ConstString name(context.m_decl_name.getAsString().c_str());
Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS));
if (GetImportInProgress()) {
LLDB_LOGV(log, "Ignoring a query during an import");
return;
}
if (log) {
if (!context.m_decl_context)
LLDB_LOG(log,
"ClangExpressionDeclMap::FindExternalVisibleDecls for "
"'{0}' in a NULL DeclContext",
name);
else if (const NamedDecl *context_named_decl =
dyn_cast<NamedDecl>(context.m_decl_context))
LLDB_LOG(log,
"ClangExpressionDeclMap::FindExternalVisibleDecls for "
"'{0}' in '{1}'",
name, context_named_decl->getNameAsString());
else
LLDB_LOG(log,
"ClangExpressionDeclMap::FindExternalVisibleDecls for "
"'{0}' in a '{1}'",
name, context.m_decl_context->getDeclKindName());
}
if (const NamespaceDecl *namespace_context =
dyn_cast<NamespaceDecl>(context.m_decl_context)) {
if (namespace_context->getName().str() ==
std::string(g_lldb_local_vars_namespace_cstr)) {
CompilerDeclContext compiler_decl_ctx =
m_clang_ast_context->CreateDeclContext(
const_cast<clang::DeclContext *>(context.m_decl_context));
FindExternalVisibleDecls(context, lldb::ModuleSP(), compiler_decl_ctx);
return;
}
ClangASTImporter::NamespaceMapSP namespace_map =
m_ast_importer_sp->GetNamespaceMap(namespace_context);
if (!namespace_map)
return;
LLDB_LOGV(log, " CEDM::FEVD Inspecting (NamespaceMap*){0:x} ({1} entries)",
namespace_map.get(), namespace_map->size());
for (ClangASTImporter::NamespaceMap::iterator i = namespace_map->begin(),
e = namespace_map->end();
i != e; ++i) {
LLDB_LOG(log, " CEDM::FEVD Searching namespace {0} in module {1}",
i->second.GetName(), i->first->GetFileSpec().GetFilename());
FindExternalVisibleDecls(context, i->first, i->second);
}
} else if (isa<TranslationUnitDecl>(context.m_decl_context)) {
CompilerDeclContext namespace_decl;
LLDB_LOG(log, " CEDM::FEVD Searching the root namespace");
FindExternalVisibleDecls(context, lldb::ModuleSP(), namespace_decl);
}
ClangASTSource::FindExternalVisibleDecls(context);
}
void ClangExpressionDeclMap::MaybeRegisterFunctionBody(
FunctionDecl *copied_function_decl) {
if (copied_function_decl->getBody() && m_parser_vars->m_code_gen) {
clang::DeclGroupRef decl_group_ref(copied_function_decl);
m_parser_vars->m_code_gen->HandleTopLevelDecl(decl_group_ref);
}
}
clang::NamedDecl *ClangExpressionDeclMap::GetPersistentDecl(ConstString name) {
if (!m_parser_vars)
return nullptr;
Target *target = m_parser_vars->m_exe_ctx.GetTargetPtr();
if (!target)
return nullptr;
TypeSystemClang::GetScratch(*target);
if (!m_parser_vars->m_persistent_vars)
return nullptr;
return m_parser_vars->m_persistent_vars->GetPersistentDecl(name);
}
void ClangExpressionDeclMap::SearchPersistenDecls(NameSearchContext &context,
const ConstString name) {
Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS));
NamedDecl *persistent_decl = GetPersistentDecl(name);
if (!persistent_decl)
return;
Decl *parser_persistent_decl = CopyDecl(persistent_decl);
if (!parser_persistent_decl)
return;
NamedDecl *parser_named_decl = dyn_cast<NamedDecl>(parser_persistent_decl);
if (!parser_named_decl)
return;
if (clang::FunctionDecl *parser_function_decl =
llvm::dyn_cast<clang::FunctionDecl>(parser_named_decl)) {
MaybeRegisterFunctionBody(parser_function_decl);
}
LLDB_LOG(log, " CEDM::FEVD Found persistent decl %s", name);
context.AddNamedDecl(parser_named_decl);
}
void ClangExpressionDeclMap::LookUpLldbClass(NameSearchContext &context) {
Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS));
StackFrame *frame = m_parser_vars->m_exe_ctx.GetFramePtr();
SymbolContext sym_ctx;
if (frame != nullptr)
sym_ctx = frame->GetSymbolContext(lldb::eSymbolContextFunction |
lldb::eSymbolContextBlock);
if (m_ctx_obj) {
Status status;
lldb::ValueObjectSP ctx_obj_ptr = m_ctx_obj->AddressOf(status);
if (!ctx_obj_ptr || status.Fail())
return;
AddThisType(context, TypeFromUser(m_ctx_obj->GetCompilerType()));
m_struct_vars->m_object_pointer_type =
TypeFromUser(ctx_obj_ptr->GetCompilerType());
return;
}
// Clang is looking for the type of "this"
if (frame == nullptr)
return;
// Find the block that defines the function represented by "sym_ctx"
Block *function_block = sym_ctx.GetFunctionBlock();
if (!function_block)
return;
CompilerDeclContext function_decl_ctx = function_block->GetDeclContext();
if (!function_decl_ctx)
return;
clang::CXXMethodDecl *method_decl =
TypeSystemClang::DeclContextGetAsCXXMethodDecl(function_decl_ctx);
if (method_decl) {
clang::CXXRecordDecl *class_decl = method_decl->getParent();
QualType class_qual_type(class_decl->getTypeForDecl(), 0);
TypeFromUser class_user_type(class_qual_type.getAsOpaquePtr(),
function_decl_ctx.GetTypeSystem());
LLDB_LOG(log, " CEDM::FEVD Adding type for $__lldb_class: {1}",
class_qual_type.getAsString());
AddThisType(context, class_user_type);
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(),
function_decl_ctx.GetTypeSystem());
m_struct_vars->m_object_pointer_type = self_user_type;
}
return;
}
// This branch will get hit if we are executing code in the context of
// a function that claims to have an object pointer (through
// DW_AT_object_pointer?) but is not formally a method of the class.
// In that case, just look up the "this" variable in the current scope
// and use its type.
// FIXME: This code is formally correct, but clang doesn't currently
// emit DW_AT_object_pointer
// for C++ so it hasn't actually been tested.
VariableList *vars = frame->GetVariableList(false);
lldb::VariableSP this_var = vars->FindVariable(ConstString("this"));
if (this_var && this_var->IsInScope(frame) &&
this_var->LocationIsValidForFrame(frame)) {
Type *this_type = this_var->GetType();
if (!this_type)
return;
TypeFromUser pointee_type =
this_type->GetForwardCompilerType().GetPointeeType();
LLDB_LOG(log, " FEVD Adding type for $__lldb_class: {1}",
ClangUtil::GetQualType(pointee_type).getAsString());
AddThisType(context, pointee_type);
TypeFromUser this_user_type(this_type->GetFullCompilerType());
m_struct_vars->m_object_pointer_type = this_user_type;
}
}
void ClangExpressionDeclMap::LookUpLldbObjCClass(NameSearchContext &context) {
Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS));
StackFrame *frame = m_parser_vars->m_exe_ctx.GetFramePtr();
if (m_ctx_obj) {
Status status;
lldb::ValueObjectSP ctx_obj_ptr = m_ctx_obj->AddressOf(status);
if (!ctx_obj_ptr || status.Fail())
return;
AddOneType(context, TypeFromUser(m_ctx_obj->GetCompilerType()));
m_struct_vars->m_object_pointer_type =
TypeFromUser(ctx_obj_ptr->GetCompilerType());
return;
}
// Clang is looking for the type of "*self"
if (!frame)
return;
SymbolContext sym_ctx = frame->GetSymbolContext(lldb::eSymbolContextFunction |
lldb::eSymbolContextBlock);
// Find the block that defines the function represented by "sym_ctx"
Block *function_block = sym_ctx.GetFunctionBlock();
if (!function_block)
return;
CompilerDeclContext function_decl_ctx = function_block->GetDeclContext();
if (!function_decl_ctx)
return;
clang::ObjCMethodDecl *method_decl =
TypeSystemClang::DeclContextGetAsObjCMethodDecl(function_decl_ctx);
if (method_decl) {
ObjCInterfaceDecl *self_interface = method_decl->getClassInterface();
if (!self_interface)
return;
const clang::Type *interface_type = self_interface->getTypeForDecl();
if (!interface_type)
return; // This is unlikely, but we have seen crashes where this
// occurred
TypeFromUser class_user_type(QualType(interface_type, 0).getAsOpaquePtr(),
function_decl_ctx.GetTypeSystem());
LLDB_LOG(log, " FEVD[{0}] Adding type for $__lldb_objc_class: {1}",
ClangUtil::ToString(interface_type));
AddOneType(context, class_user_type);
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(),
function_decl_ctx.GetTypeSystem());
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(),
function_decl_ctx.GetTypeSystem());
m_struct_vars->m_object_pointer_type = self_user_type;
}
return;
}
// This branch will get hit if we are executing code in the context of
// a function that claims to have an object pointer (through
// DW_AT_object_pointer?) but is not formally a method of the class.
// In that case, just look up the "self" variable in the current scope
// and use its type.
VariableList *vars = frame->GetVariableList(false);
lldb::VariableSP self_var = vars->FindVariable(ConstString("self"));
if (!self_var)
return;
if (!self_var->IsInScope(frame))
return;
if (!self_var->LocationIsValidForFrame(frame))
return;
Type *self_type = self_var->GetType();
if (!self_type)
return;
CompilerType self_clang_type = self_type->GetFullCompilerType();
if (TypeSystemClang::IsObjCClassType(self_clang_type)) {
return;
}
if (!TypeSystemClang::IsObjCObjectPointerType(self_clang_type))
return;
self_clang_type = self_clang_type.GetPointeeType();
if (!self_clang_type)
return;
LLDB_LOG(log, " FEVD[{0}] Adding type for $__lldb_objc_class: {1}",
ClangUtil::ToString(self_type->GetFullCompilerType()));
TypeFromUser class_user_type(self_clang_type);
AddOneType(context, class_user_type);
TypeFromUser self_user_type(self_type->GetFullCompilerType());
m_struct_vars->m_object_pointer_type = self_user_type;
}
void ClangExpressionDeclMap::LookupLocalVarNamespace(
SymbolContext &sym_ctx, NameSearchContext &name_context) {
if (sym_ctx.block == nullptr)
return;
CompilerDeclContext frame_decl_context = sym_ctx.block->GetDeclContext();
if (!frame_decl_context)
return;
TypeSystemClang *frame_ast = llvm::dyn_cast_or_null<TypeSystemClang>(
frame_decl_context.GetTypeSystem());
if (!frame_ast)
return;
clang::NamespaceDecl *namespace_decl =
m_clang_ast_context->GetUniqueNamespaceDeclaration(
g_lldb_local_vars_namespace_cstr, nullptr, OptionalClangModuleID());
if (!namespace_decl)
return;
name_context.AddNamedDecl(namespace_decl);
clang::DeclContext *ctxt = clang::Decl::castToDeclContext(namespace_decl);
ctxt->setHasExternalVisibleStorage(true);
name_context.m_found_local_vars_nsp = true;
}
void ClangExpressionDeclMap::LookupInModulesDeclVendor(
NameSearchContext &context, ConstString name) {
Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS));
if (!m_target)
return;
auto *modules_decl_vendor = m_target->GetClangModulesDeclVendor();
if (!modules_decl_vendor)
return;
bool append = false;
uint32_t max_matches = 1;
std::vector<clang::NamedDecl *> decls;
if (!modules_decl_vendor->FindDecls(name, append, max_matches, decls))
return;
assert(!decls.empty() && "FindDecls returned true but no decls?");
clang::NamedDecl *const decl_from_modules = decls[0];
LLDB_LOG(log,
" CAS::FEVD Matching decl found for "
"\"{1}\" in the modules",
name);
clang::Decl *copied_decl = CopyDecl(decl_from_modules);
if (!copied_decl) {
LLDB_LOG(log, " CAS::FEVD - Couldn't export a "
"declaration from the modules");
return;
}
if (auto copied_function = dyn_cast<clang::FunctionDecl>(copied_decl)) {
MaybeRegisterFunctionBody(copied_function);
context.AddNamedDecl(copied_function);
context.m_found_function_with_type_info = true;
context.m_found_function = true;
} else if (auto copied_var = dyn_cast<clang::VarDecl>(copied_decl)) {
context.AddNamedDecl(copied_var);
context.m_found_variable = true;
}
}
bool ClangExpressionDeclMap::LookupLocalVariable(
NameSearchContext &context, ConstString name, SymbolContext &sym_ctx,
const CompilerDeclContext &namespace_decl) {
if (sym_ctx.block == nullptr)
return false;
CompilerDeclContext decl_context = sym_ctx.block->GetDeclContext();
if (!decl_context)
return false;
// Make sure that the variables are parsed so that we have the
// declarations.
StackFrame *frame = m_parser_vars->m_exe_ctx.GetFramePtr();
VariableListSP vars = frame->GetInScopeVariableList(true);
for (size_t i = 0; i < vars->GetSize(); i++)
vars->GetVariableAtIndex(i)->GetDecl();
// Search for declarations matching the name. Do not include imported
// decls in the search if we are looking for decls in the artificial
// namespace $__lldb_local_vars.
std::vector<CompilerDecl> found_decls =
decl_context.FindDeclByName(name, namespace_decl.IsValid());
VariableSP var;
bool variable_found = false;
for (CompilerDecl decl : found_decls) {
for (size_t vi = 0, ve = vars->GetSize(); vi != ve; ++vi) {
VariableSP candidate_var = vars->GetVariableAtIndex(vi);
if (candidate_var->GetDecl() == decl) {
var = candidate_var;
break;
}
}
if (var && !variable_found) {
variable_found = true;
ValueObjectSP valobj = ValueObjectVariable::Create(frame, var);
AddOneVariable(context, var, valobj);
context.m_found_variable = true;
}
}
return variable_found;
}
/// Structure to hold the info needed when comparing function
/// declarations.
namespace {
struct FuncDeclInfo {
ConstString m_name;
CompilerType m_copied_type;
uint32_t m_decl_lvl;
SymbolContext m_sym_ctx;
};
} // namespace
SymbolContextList ClangExpressionDeclMap::SearchFunctionsInSymbolContexts(
const SymbolContextList &sc_list,
const CompilerDeclContext &frame_decl_context) {
// First, symplify things by looping through the symbol contexts to
// remove unwanted functions and separate out the functions we want to
// compare and prune into a separate list. Cache the info needed about
// the function declarations in a vector for efficiency.
uint32_t num_indices = sc_list.GetSize();
SymbolContextList sc_sym_list;
std::vector<FuncDeclInfo> decl_infos;
decl_infos.reserve(num_indices);
clang::DeclContext *frame_decl_ctx =
(clang::DeclContext *)frame_decl_context.GetOpaqueDeclContext();
TypeSystemClang *ast = llvm::dyn_cast_or_null<TypeSystemClang>(
frame_decl_context.GetTypeSystem());
for (uint32_t index = 0; index < num_indices; ++index) {
FuncDeclInfo fdi;
SymbolContext sym_ctx;
sc_list.GetContextAtIndex(index, sym_ctx);
// We don't know enough about symbols to compare them, but we should
// keep them in the list.
Function *function = sym_ctx.function;
if (!function) {
sc_sym_list.Append(sym_ctx);
continue;
}
// Filter out functions without declaration contexts, as well as
// class/instance methods, since they'll be skipped in the code that
// follows anyway.
CompilerDeclContext func_decl_context = function->GetDeclContext();
if (!func_decl_context ||
func_decl_context.IsClassMethod(nullptr, nullptr, nullptr))
continue;
// We can only prune functions for which we can copy the type.
CompilerType func_clang_type = function->GetType()->GetFullCompilerType();
CompilerType copied_func_type = GuardedCopyType(func_clang_type);
if (!copied_func_type) {
sc_sym_list.Append(sym_ctx);
continue;
}
fdi.m_sym_ctx = sym_ctx;
fdi.m_name = function->GetName();
fdi.m_copied_type = copied_func_type;
fdi.m_decl_lvl = LLDB_INVALID_DECL_LEVEL;
if (fdi.m_copied_type && func_decl_context) {
// Call CountDeclLevels to get the number of parent scopes we have
// to look through before we find the function declaration. When
// comparing functions of the same type, the one with a lower count
// will be closer to us in the lookup scope and shadows the other.
clang::DeclContext *func_decl_ctx =
(clang::DeclContext *)func_decl_context.GetOpaqueDeclContext();
fdi.m_decl_lvl = ast->CountDeclLevels(frame_decl_ctx, func_decl_ctx,
&fdi.m_name, &fdi.m_copied_type);
}
decl_infos.emplace_back(fdi);
}
// Loop through the functions in our cache looking for matching types,
// then compare their scope levels to see which is closer.
std::multimap<CompilerType, const FuncDeclInfo *> matches;
for (const FuncDeclInfo &fdi : decl_infos) {
const CompilerType t = fdi.m_copied_type;
auto q = matches.find(t);
if (q != matches.end()) {
if (q->second->m_decl_lvl > fdi.m_decl_lvl)
// This function is closer; remove the old set.
matches.erase(t);
else if (q->second->m_decl_lvl < fdi.m_decl_lvl)
// The functions in our set are closer - skip this one.
continue;
}
matches.insert(std::make_pair(t, &fdi));
}
// Loop through our matches and add their symbol contexts to our list.
SymbolContextList sc_func_list;
for (const auto &q : matches)
sc_func_list.Append(q.second->m_sym_ctx);
// Rejoin the lists with the functions in front.
sc_func_list.Append(sc_sym_list);
return sc_func_list;
}
void ClangExpressionDeclMap::LookupFunction(
NameSearchContext &context, lldb::ModuleSP module_sp, ConstString name,
const CompilerDeclContext &namespace_decl) {
if (!m_parser_vars)
return;
Target *target = m_parser_vars->m_exe_ctx.GetTargetPtr();
std::vector<clang::NamedDecl *> decls_from_modules;
if (target) {
if (ClangModulesDeclVendor *decl_vendor =
target->GetClangModulesDeclVendor()) {
decl_vendor->FindDecls(name, false, UINT32_MAX, decls_from_modules);
}
}
const bool include_inlines = false;
SymbolContextList sc_list;
if (namespace_decl && module_sp) {
const bool include_symbols = false;
module_sp->FindFunctions(name, namespace_decl, eFunctionNameTypeBase,
include_symbols, include_inlines, sc_list);
} else if (target && !namespace_decl) {
const bool include_symbols = true;
// TODO Fix FindFunctions so that it doesn't return
// instance methods for eFunctionNameTypeBase.
target->GetImages().FindFunctions(
name, eFunctionNameTypeFull | eFunctionNameTypeBase, include_symbols,
include_inlines, sc_list);
}
// If we found more than one function, see if we can use the frame's decl
// context to remove functions that are shadowed by other functions which
// match in type but are nearer in scope.
//
// AddOneFunction will not add a function whose type has already been
// added, so if there's another function in the list with a matching type,
// check to see if their decl context is a parent of the current frame's or
// was imported via a and using statement, and pick the best match
// according to lookup rules.
if (sc_list.GetSize() > 1) {
// Collect some info about our frame's context.
StackFrame *frame = m_parser_vars->m_exe_ctx.GetFramePtr();
SymbolContext frame_sym_ctx;
if (frame != nullptr)
frame_sym_ctx = frame->GetSymbolContext(lldb::eSymbolContextFunction |
lldb::eSymbolContextBlock);
CompilerDeclContext frame_decl_context =
frame_sym_ctx.block != nullptr ? frame_sym_ctx.block->GetDeclContext()
: CompilerDeclContext();
// We can't do this without a compiler decl context for our frame.
if (frame_decl_context) {
sc_list = SearchFunctionsInSymbolContexts(sc_list, frame_decl_context);
}
}
if (sc_list.GetSize()) {
Symbol *extern_symbol = nullptr;
Symbol *non_extern_symbol = nullptr;
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) {
CompilerDeclContext decl_ctx = sym_ctx.function->GetDeclContext();
if (!decl_ctx)
continue;
// Filter out class/instance methods.
if (decl_ctx.IsClassMethod(nullptr, nullptr, nullptr))
continue;
AddOneFunction(context, sym_ctx.function, nullptr);
context.m_found_function_with_type_info = true;
context.m_found_function = true;
} else if (sym_ctx.symbol) {
if (sym_ctx.symbol->GetType() == eSymbolTypeReExported && target) {
sym_ctx.symbol = sym_ctx.symbol->ResolveReExportedSymbol(*target);
if (sym_ctx.symbol == nullptr)
continue;
}
if (sym_ctx.symbol->IsExternal())
extern_symbol = sym_ctx.symbol;
else
non_extern_symbol = sym_ctx.symbol;
}
}
if (!context.m_found_function_with_type_info) {
for (clang::NamedDecl *decl : decls_from_modules) {
if (llvm::isa<clang::FunctionDecl>(decl)) {
clang::NamedDecl *copied_decl =
llvm::cast_or_null<FunctionDecl>(CopyDecl(decl));
if (copied_decl) {
context.AddNamedDecl(copied_decl);
context.m_found_function_with_type_info = true;
}
}
}
}
if (!context.m_found_function_with_type_info) {
if (extern_symbol) {
AddOneFunction(context, nullptr, extern_symbol);
context.m_found_function = true;
} else if (non_extern_symbol) {
AddOneFunction(context, nullptr, non_extern_symbol);
context.m_found_function = true;
}
}
}
}
void ClangExpressionDeclMap::FindExternalVisibleDecls(
NameSearchContext &context, lldb::ModuleSP module_sp,
const CompilerDeclContext &namespace_decl) {
assert(m_ast_context);
Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS));
const ConstString name(context.m_decl_name.getAsString().c_str());
if (IgnoreName(name, false))
return;
// Only look for functions by name out in our symbols if the function doesn't
// start with our phony prefix of '$'
Target *target = nullptr;
StackFrame *frame = nullptr;
SymbolContext sym_ctx;
if (m_parser_vars) {
target = m_parser_vars->m_exe_ctx.GetTargetPtr();
frame = m_parser_vars->m_exe_ctx.GetFramePtr();
}
if (frame != nullptr)
sym_ctx = frame->GetSymbolContext(lldb::eSymbolContextFunction |
lldb::eSymbolContextBlock);
// Try the persistent decls, which take precedence over all else.
if (!namespace_decl)
SearchPersistenDecls(context, name);
if (name.GetStringRef().startswith("$") && !namespace_decl) {
if (name == "$__lldb_class") {
LookUpLldbClass(context);
return;
}
if (name == "$__lldb_objc_class") {
LookUpLldbObjCClass(context);
return;
}
if (name == g_lldb_local_vars_namespace_cstr) {
LookupLocalVarNamespace(sym_ctx, context);
return;
}
// any other $__lldb names should be weeded out now
if (name.GetStringRef().startswith("$__lldb"))
return;
// No ParserVars means we can't do register or variable lookup.
if (!m_parser_vars || !m_parser_vars->m_persistent_vars)
return;
ExpressionVariableSP pvar_sp(
m_parser_vars->m_persistent_vars->GetVariable(name));
if (pvar_sp) {
AddOneVariable(context, pvar_sp);
return;
}
assert(name.GetStringRef().startswith("$"));
llvm::StringRef reg_name = name.GetStringRef().substr(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) {
LLDB_LOG(log, " CEDM::FEVD Found register {0}", reg_info->name);
AddOneRegister(context, reg_info);
}
}
return;
}
bool local_var_lookup = !namespace_decl || (namespace_decl.GetName() ==
g_lldb_local_vars_namespace_cstr);
if (frame && local_var_lookup)
if (LookupLocalVariable(context, name, sym_ctx, namespace_decl))
return;
if (target) {
ValueObjectSP valobj;
VariableSP var;
var = FindGlobalVariable(*target, module_sp, name, namespace_decl);
if (var) {
valobj = ValueObjectVariable::Create(target, var);
AddOneVariable(context, var, valobj);
context.m_found_variable = true;
return;
}
}
LookupFunction(context, module_sp, name, namespace_decl);
// Try the modules next.
if (!context.m_found_function_with_type_info)
LookupInModulesDeclVendor(context, name);
if (target && !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.
Status error;
const Symbol *data_symbol =
m_parser_vars->m_sym_ctx.FindBestGlobalDataSymbol(name, error);
if (!error.Success()) {
const unsigned diag_id =
m_ast_context->getDiagnostics().getCustomDiagID(
clang::DiagnosticsEngine::Level::Error, "%0");
m_ast_context->getDiagnostics().Report(diag_id) << error.AsCString();
}
if (data_symbol) {
std::string warning("got name from symbols: ");
warning.append(name.AsCString());
const unsigned diag_id =
m_ast_context->getDiagnostics().getCustomDiagID(
clang::DiagnosticsEngine::Level::Warning, "%0");
m_ast_context->getDiagnostics().Report(diag_id) << warning.c_str();
AddOneGenericVariable(context, *data_symbol);
context.m_found_variable = true;
}
}
}
bool ClangExpressionDeclMap::GetVariableValue(VariableSP &var,
lldb_private::Value &var_location,
TypeFromUser *user_type,
TypeFromParser *parser_type) {
Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS));
Type *var_type = var->GetType();
if (!var_type) {
LLDB_LOG(log, "Skipped a definition because it has no type");
return false;
}
CompilerType var_clang_type = var_type->GetFullCompilerType();
if (!var_clang_type) {
LLDB_LOG(log, "Skipped a definition because it has no Clang type");
return false;
}
TypeSystemClang *clang_ast = llvm::dyn_cast_or_null<TypeSystemClang>(
var_type->GetForwardCompilerType().GetTypeSystem());
if (!clang_ast) {
LLDB_LOG(log, "Skipped a definition because it has no Clang AST");
return false;
}
DWARFExpression &var_location_expr = var->LocationExpression();
Target *target = m_parser_vars->m_exe_ctx.GetTargetPtr();
Status err;
if (var->GetLocationIsConstantValueData()) {
DataExtractor const_value_extractor;
if (var_location_expr.GetExpressionData(const_value_extractor)) {
var_location = Value(const_value_extractor.GetDataStart(),
const_value_extractor.GetByteSize());
var_location.SetValueType(Value::eValueTypeHostAddress);
} else {
LLDB_LOG(log, "Error evaluating constant variable: {0}", err.AsCString());
return false;
}
}
CompilerType type_to_use = GuardedCopyType(var_clang_type);
if (!type_to_use) {
LLDB_LOG(log,
"Couldn't copy a variable's type into the parser's AST context");
return false;
}
if (parser_type)
*parser_type = TypeFromParser(type_to_use);
if (var_location.GetContextType() == Value::eContextTypeInvalid)
var_location.SetCompilerType(type_to_use);
if (var_location.GetValueType() == Value::eValueTypeFileAddress) {
SymbolContext var_sc;
var->CalculateSymbolContext(&var_sc);
if (!var_sc.module_sp)
return false;
Address so_addr(var_location.GetScalar().ULongLong(),
var_sc.module_sp->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_clang_type);
return true;
}
void ClangExpressionDeclMap::AddOneVariable(NameSearchContext &context,
VariableSP var,
ValueObjectSP valobj) {
assert(m_parser_vars.get());
Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS));
TypeFromUser ut;
TypeFromParser pt;
Value var_location;
if (!GetVariableValue(var, var_location, &ut, &pt))
return;
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 (const ObjCObjectPointerType *objc_object_ptr_type =
dyn_cast<ObjCObjectPointerType>(parser_type))
CompleteType(objc_object_ptr_type->getInterfaceDecl());
}
bool is_reference = pt.IsReferenceType();
NamedDecl *var_decl = nullptr;
if (is_reference)
var_decl = context.AddVarDecl(pt);
else
var_decl = context.AddVarDecl(pt.GetLValueReferenceType());
std::string decl_name(context.m_decl_name.getAsString());
ConstString entity_name(decl_name.c_str());
ClangExpressionVariable *entity(new ClangExpressionVariable(valobj));
m_found_entities.AddNewlyConstructedVariable(entity);
assert(entity);
entity->EnableParserVars(GetParserID());
ClangExpressionVariable::ParserVars *parser_vars =
entity->GetParserVars(GetParserID());
parser_vars->m_named_decl = var_decl;
parser_vars->m_llvm_value = nullptr;
parser_vars->m_lldb_value = var_location;
parser_vars->m_lldb_var = var;
if (is_reference)
entity->m_flags |= ClangExpressionVariable::EVTypeIsReference;
LLDB_LOG(log, " CEDM::FEVD Found variable {1}, returned\n{2} (original {3})",
decl_name, ClangUtil::DumpDecl(var_decl), ClangUtil::ToString(ut));
}
void ClangExpressionDeclMap::AddOneVariable(NameSearchContext &context,
ExpressionVariableSP &pvar_sp) {
Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS));
TypeFromUser user_type(
llvm::cast<ClangExpressionVariable>(pvar_sp.get())->GetTypeFromUser());
TypeFromParser parser_type(GuardedCopyType(user_type));
if (!parser_type.GetOpaqueQualType()) {
LLDB_LOG(log, " CEDM::FEVD Couldn't import type for pvar {0}",
pvar_sp->GetName());
return;
}
NamedDecl *var_decl =
context.AddVarDecl(parser_type.GetLValueReferenceType());
llvm::cast<ClangExpressionVariable>(pvar_sp.get())
->EnableParserVars(GetParserID());
ClangExpressionVariable::ParserVars *parser_vars =
llvm::cast<ClangExpressionVariable>(pvar_sp.get())
->GetParserVars(GetParserID());
parser_vars->m_named_decl = var_decl;
parser_vars->m_llvm_value = nullptr;
parser_vars->m_lldb_value.Clear();
LLDB_LOG(log, " CEDM::FEVD Added pvar {1}, returned\n{2}",
pvar_sp->GetName(), ClangUtil::DumpDecl(var_decl));
}
void ClangExpressionDeclMap::AddOneGenericVariable(NameSearchContext &context,
const Symbol &symbol) {
assert(m_parser_vars.get());
Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS));
Target *target = m_parser_vars->m_exe_ctx.GetTargetPtr();
if (target == nullptr)
return;
TypeSystemClang *scratch_ast_context = TypeSystemClang::GetScratch(*target);
if (!scratch_ast_context)
return;
TypeFromUser user_type(scratch_ast_context->GetBasicType(eBasicTypeVoid)
.GetPointerType()
.GetLValueReferenceType());
TypeFromParser parser_type(m_clang_ast_context->GetBasicType(eBasicTypeVoid)
.GetPointerType()
.GetLValueReferenceType());
NamedDecl *var_decl = context.AddVarDecl(parser_type);
std::string decl_name(context.m_decl_name.getAsString());
ConstString entity_name(decl_name.c_str());
ClangExpressionVariable *entity(new ClangExpressionVariable(
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));
m_found_entities.AddNewlyConstructedVariable(entity);
entity->EnableParserVars(GetParserID());
ClangExpressionVariable::ParserVars *parser_vars =
entity->GetParserVars(GetParserID());
const Address symbol_address = symbol.GetAddress();
lldb::addr_t symbol_load_addr = symbol_address.GetLoadAddress(target);
// parser_vars->m_lldb_value.SetContext(Value::eContextTypeClangType,
// user_type.GetOpaqueQualType());
parser_vars->m_lldb_value.SetCompilerType(user_type);
parser_vars->m_lldb_value.GetScalar() = symbol_load_addr;
parser_vars->m_lldb_value.SetValueType(Value::eValueTypeLoadAddress);
parser_vars->m_named_decl = var_decl;
parser_vars->m_llvm_value = nullptr;
parser_vars->m_lldb_sym = &symbol;
LLDB_LOG(log, " CEDM::FEVD Found variable {1}, returned\n{2}", decl_name,
ClangUtil::DumpDecl(var_decl));
}
void ClangExpressionDeclMap::AddOneRegister(NameSearchContext &context,
const RegisterInfo *reg_info) {
Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS));
CompilerType clang_type =
m_clang_ast_context->GetBuiltinTypeForEncodingAndBitSize(
reg_info->encoding, reg_info->byte_size * 8);
if (!clang_type) {
LLDB_LOG(log, " Tried to add a type for {0}, but couldn't get one",
context.m_decl_name.getAsString());
return;
}
TypeFromParser parser_clang_type(clang_type);
NamedDecl *var_decl = context.AddVarDecl(parser_clang_type);
ClangExpressionVariable *entity(new ClangExpressionVariable(
m_parser_vars->m_exe_ctx.GetBestExecutionContextScope(),
m_parser_vars->m_target_info.byte_order,
m_parser_vars->m_target_info.address_byte_size));
m_found_entities.AddNewlyConstructedVariable(entity);
std::string decl_name(context.m_decl_name.getAsString());
entity->SetName(ConstString(decl_name.c_str()));
entity->SetRegisterInfo(reg_info);
entity->EnableParserVars(GetParserID());
ClangExpressionVariable::ParserVars *parser_vars =
entity->GetParserVars(GetParserID());
parser_vars->m_named_decl = var_decl;
parser_vars->m_llvm_value = nullptr;
parser_vars->m_lldb_value.Clear();
entity->m_flags |= ClangExpressionVariable::EVBareRegister;
LLDB_LOG(log, " CEDM::FEVD Added register {1}, returned\n{2}",
context.m_decl_name.getAsString(), ClangUtil::DumpDecl(var_decl));
}
void ClangExpressionDeclMap::AddOneFunction(NameSearchContext &context,
Function *function,
Symbol *symbol) {
assert(m_parser_vars.get());
Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS));
NamedDecl *function_decl = nullptr;
Address fun_address;
CompilerType function_clang_type;
bool is_indirect_function = false;
if (function) {
Type *function_type = function->GetType();
const auto lang = function->GetCompileUnit()->GetLanguage();
const auto name = function->GetMangled().GetMangledName().AsCString();
const bool extern_c = (Language::LanguageIsC(lang) &&
!CPlusPlusLanguage::IsCPPMangledName(name)) ||
(Language::LanguageIsObjC(lang) &&
!Language::LanguageIsCPlusPlus(lang));
if (!extern_c) {
TypeSystem *type_system = function->GetDeclContext().GetTypeSystem();
if (llvm::isa<TypeSystemClang>(type_system)) {
clang::DeclContext *src_decl_context =
(clang::DeclContext *)function->GetDeclContext()
.GetOpaqueDeclContext();
clang::FunctionDecl *src_function_decl =
llvm::dyn_cast_or_null<clang::FunctionDecl>(src_decl_context);
if (src_function_decl &&
src_function_decl->getTemplateSpecializationInfo()) {
clang::FunctionTemplateDecl *function_template =
src_function_decl->getTemplateSpecializationInfo()->getTemplate();
clang::FunctionTemplateDecl *copied_function_template =
llvm::dyn_cast_or_null<clang::FunctionTemplateDecl>(
CopyDecl(function_template));
if (copied_function_template) {
if (log) {
StreamString ss;
function->DumpSymbolContext(&ss);
LLDB_LOG(log,
" CEDM::FEVD Imported decl for function template"
" {1} (description {2}), returned\n{3}",
copied_function_template->getNameAsString(),
ss.GetData(),
ClangUtil::DumpDecl(copied_function_template));
}
context.AddNamedDecl(copied_function_template);
}
} else if (src_function_decl) {
if (clang::FunctionDecl *copied_function_decl =
llvm::dyn_cast_or_null<clang::FunctionDecl>(
CopyDecl(src_function_decl))) {
if (log) {
StreamString ss;
function->DumpSymbolContext(&ss);
LLDB_LOG(log,
" CEDM::FEVD Imported decl for function {1} "
"(description {2}), returned\n{3}",
copied_function_decl->getNameAsString(), ss.GetData(),
ClangUtil::DumpDecl(copied_function_decl));
}
context.AddNamedDecl(copied_function_decl);
return;
} else {
LLDB_LOG(log, " Failed to import the function decl for '{0}'",
src_function_decl->getName());
}
}
}
}
if (!function_type) {
LLDB_LOG(log, " Skipped a function because it has no type");
return;
}
function_clang_type = function_type->GetFullCompilerType();
if (!function_clang_type) {
LLDB_LOG(log, " Skipped a function because it has no Clang type");
return;
}
fun_address = function->GetAddressRange().GetBaseAddress();
CompilerType copied_function_type = GuardedCopyType(function_clang_type);
if (copied_function_type) {
function_decl = context.AddFunDecl(copied_function_type, extern_c);
if (!function_decl) {
LLDB_LOG(log, " Failed to create a function decl for '{0}' ({1:x})",
function_type->GetName(), function_type->GetID());
return;
}
} else {
// We failed to copy the type we found
LLDB_LOG(log,
" Failed to import the function type '{0}' ({1:x})"
" into the expression parser AST contenxt",
function_type->GetName(), function_type->GetID());
return;
}
} else if (symbol) {
fun_address = symbol->GetAddress();
function_decl = context.AddGenericFunDecl();
is_indirect_function = symbol->IsIndirect();
} else {
LLDB_LOG(log, " 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, is_indirect_function);
ClangExpressionVariable *entity(new ClangExpressionVariable(
m_parser_vars->m_exe_ctx.GetBestExecutionContextScope(),
m_parser_vars->m_target_info.byte_order,
m_parser_vars->m_target_info.address_byte_size));
m_found_entities.AddNewlyConstructedVariable(entity);
std::string decl_name(context.m_decl_name.getAsString());
entity->SetName(ConstString(decl_name.c_str()));
entity->SetCompilerType(function_clang_type);
entity->EnableParserVars(GetParserID());
ClangExpressionVariable::ParserVars *parser_vars =
entity->GetParserVars(GetParserID());
if (load_addr != LLDB_INVALID_ADDRESS) {
parser_vars->m_lldb_value.SetValueType(Value::eValueTypeLoadAddress);
parser_vars->m_lldb_value.GetScalar() = load_addr;
} else {
// We have to try finding a file address.
lldb::addr_t file_addr = fun_address.GetFileAddress();
parser_vars->m_lldb_value.SetValueType(Value::eValueTypeFileAddress);
parser_vars->m_lldb_value.GetScalar() = file_addr;
}
parser_vars->m_named_decl = function_decl;
parser_vars->m_llvm_value = nullptr;
if (log) {
StreamString ss;
fun_address.Dump(&ss,
m_parser_vars->m_exe_ctx.GetBestExecutionContextScope(),
Address::DumpStyleResolvedDescription);
LLDB_LOG(log,
" CEDM::FEVD Found {1} function {2} (description {3}), "
"returned\n{4}",
(function ? "specific" : "generic"), decl_name, ss.GetData(),
ClangUtil::DumpDecl(function_decl));
}
}
void ClangExpressionDeclMap::AddThisType(NameSearchContext &context,
const TypeFromUser &ut) {
CompilerType copied_clang_type = GuardedCopyType(ut);
Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS));
if (!copied_clang_type) {
LLDB_LOG(log,
"ClangExpressionDeclMap::AddThisType - Couldn't import the type");
return;
}
if (copied_clang_type.IsAggregateType() &&
copied_clang_type.GetCompleteType()) {
CompilerType void_clang_type =
m_clang_ast_context->GetBasicType(eBasicTypeVoid);
CompilerType void_ptr_clang_type = void_clang_type.GetPointerType();
CompilerType method_type = m_clang_ast_context->CreateFunctionType(
void_clang_type, &void_ptr_clang_type, 1, false, 0);
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;
CXXMethodDecl *method_decl = m_clang_ast_context->AddMethodToCXXRecordType(
copied_clang_type.GetOpaqueQualType(), "$__lldb_expr", nullptr,
method_type, lldb::eAccessPublic, is_virtual, is_static, is_inline,
is_explicit, is_attr_used, is_artificial);
LLDB_LOG(log,
" CEDM::AddThisType Added function $__lldb_expr "
"(description {0}) for this type\n{1}",
ClangUtil::ToString(copied_clang_type),
ClangUtil::DumpDecl(method_decl));
}
if (!copied_clang_type.IsValid())
return;
TypeSourceInfo *type_source_info = m_ast_context->getTrivialTypeSourceInfo(
QualType::getFromOpaquePtr(copied_clang_type.GetOpaqueQualType()));
if (!type_source_info)
return;
// Construct a typedef type because if "*this" is a templated type we can't
// just return ClassTemplateSpecializationDecls in response to name queries.
// Using a typedef makes this much more robust.
TypedefDecl *typedef_decl = TypedefDecl::Create(
*m_ast_context, m_ast_context->getTranslationUnitDecl(), SourceLocation(),
SourceLocation(), context.m_decl_name.getAsIdentifierInfo(),
type_source_info);
if (!typedef_decl)
return;
context.AddNamedDecl(typedef_decl);
return;
}
void ClangExpressionDeclMap::AddOneType(NameSearchContext &context,
const TypeFromUser &ut) {
CompilerType copied_clang_type = GuardedCopyType(ut);
if (!copied_clang_type) {
Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS));
LLDB_LOG(log,
"ClangExpressionDeclMap::AddOneType - Couldn't import the type");
return;
}
context.AddTypeDecl(copied_clang_type);
}
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