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

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//===-- ClangExpressionDeclMap.cpp -----------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "ClangExpressionDeclMap.h"
#include "ASTDumper.h"
#include "ClangASTSource.h"
#include "ClangModulesDeclVendor.h"
#include "ClangPersistentVariables.h"
#include "clang/AST/ASTConsumer.h"
#include "clang/AST/ASTContext.h"
#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/ModuleSpec.h"
#include "lldb/Core/RegisterValue.h"
#include "lldb/Core/ValueObjectConstResult.h"
#include "lldb/Core/ValueObjectVariable.h"
#include "lldb/Expression/Materializer.h"
#include "lldb/Host/Endian.h"
#include "lldb/Symbol/ClangASTContext.h"
#include "lldb/Symbol/CompilerDecl.h"
#include "lldb/Symbol/CompilerDeclContext.h"
#include "lldb/Symbol/CompileUnit.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/CPPLanguageRuntime.h"
#include "lldb/Target/ExecutionContext.h"
#include "lldb/Target/ObjCLanguageRuntime.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 "Plugins/Language/CPlusPlus/CPlusPlusLanguage.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,
ExecutionContext &exe_ctx) :
ClangASTSource (exe_ctx.GetTargetSP()),
m_found_entities (),
m_struct_members (),
m_keep_result_in_memory (keep_result_in_memory),
m_result_delegate (result_delegate),
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)
{
ClangASTMetrics::ClearLocalCounters();
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 (!target->GetScratchClangASTContext())
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()
{
Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_EXPRESSIONS));
if (log)
ClangASTMetrics::DumpCounters(log);
if (m_parser_vars.get())
{
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;
}
bool
ClangExpressionDeclMap::AddPersistentVariable
(
const NamedDecl *decl,
const ConstString &name,
TypeFromParser parser_type,
bool is_result,
bool is_lvalue
)
{
assert (m_parser_vars.get());
ClangASTContext *ast = llvm::dyn_cast_or_null<ClangASTContext>(parser_type.GetTypeSystem());
if (ast == nullptr)
return false;
if (m_parser_vars->m_materializer && is_result)
{
Error err;
ExecutionContext &exe_ctx = m_parser_vars->m_exe_ctx;
Target *target = exe_ctx.GetTargetPtr();
if (target == nullptr)
return false;
ClangASTContext *context(target->GetScratchClangASTContext());
TypeFromUser user_type(m_ast_importer_sp->DeportType(context->getASTContext(),
ast->getASTContext(),
parser_type.GetOpaqueQualType()),
context);
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;
parser_vars->m_parser_type = parser_type;
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 == NULL)
return false;
ClangASTContext *context(target->GetScratchClangASTContext());
TypeFromUser user_type(m_ast_importer_sp->DeportType(context->getASTContext(),
ast->getASTContext(),
parser_type.GetOpaqueQualType()),
context);
if (!user_type.GetOpaqueQualType())
{
if (log)
log->Printf("Persistent variable's type wasn't copied successfully");
return false;
}
if (!m_parser_vars->m_target_info.IsValid())
return false;
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;
}
if (log)
log->Printf("Created persistent variable with flags 0x%hx", var->m_flags);
var->EnableParserVars(GetParserID());
ClangExpressionVariable::ParserVars *parser_vars = var->GetParserVars(GetParserID());
parser_vars->m_named_decl = decl;
parser_vars->m_parser_type = parser_type;
return true;
}
bool
ClangExpressionDeclMap::AddValueToStruct
(
const NamedDecl *decl,
const 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)
{
var = ClangExpressionVariable::FindVariableInList(*m_parser_vars->m_persistent_vars, decl, GetParserID());
is_persistent_variable = true;
}
if (!var)
return false;
if (log)
log->Printf("Adding value for (NamedDecl*)%p [%s - %s] to the structure",
static_cast<const void*>(decl), name.GetCString(),
var->GetName().GetCString());
// 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
if (log)
log->Printf("Already placed at 0x%llx", (unsigned long long)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;
Error 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;
if (log)
log->Printf("Placed at 0x%llx", (unsigned long long)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,
const 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 = process->GetObjCLanguageRuntime();
if (runtime)
{
symbol_load_addr = runtime->LookupRuntimeSymbol(name);
}
}
return symbol_load_addr;
}
addr_t
ClangExpressionDeclMap::GetSymbolAddress (const ConstString &name, lldb::SymbolType symbol_type)
{
assert (m_parser_vars.get());
if (!m_parser_vars->m_exe_ctx.GetTargetPtr())
return false;
return GetSymbolAddress(m_parser_vars->m_exe_ctx.GetTargetRef(), m_parser_vars->m_exe_ctx.GetProcessPtr(), name, symbol_type);
}
const Symbol *
ClangExpressionDeclMap::FindGlobalDataSymbol (Target &target,
const ConstString &name,
lldb_private::Module *module)
{
SymbolContextList sc_list;
if (module)
module->FindSymbolsWithNameAndType(name, eSymbolTypeAny, sc_list);
else
target.GetImages().FindSymbolsWithNameAndType(name, eSymbolTypeAny, sc_list);
const uint32_t matches = sc_list.GetSize();
for (uint32_t i=0; i<matches; ++i)
{
SymbolContext sym_ctx;
sc_list.GetContextAtIndex(i, sym_ctx);
if (sym_ctx.symbol)
{
const Symbol *symbol = sym_ctx.symbol;
const Address sym_address = symbol->GetAddress();
if (sym_address.IsValid())
{
switch (symbol->GetType())
{
case eSymbolTypeData:
case eSymbolTypeRuntime:
case eSymbolTypeAbsolute:
case eSymbolTypeObjCClass:
case eSymbolTypeObjCMetaClass:
case eSymbolTypeObjCIVar:
if (symbol->GetDemangledNameIsSynthesized())
{
// If the demangled name was synthesized, then don't use it
// for expressions. Only let the symbol match if the mangled
// named matches for these symbols.
if (symbol->GetMangled().GetMangledName() != name)
break;
}
return symbol;
case eSymbolTypeReExported:
{
ConstString reexport_name = symbol->GetReExportedSymbolName();
if (reexport_name)
{
ModuleSP reexport_module_sp;
ModuleSpec reexport_module_spec;
reexport_module_spec.GetPlatformFileSpec() = 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);
}
}
// Don't allow us to try and resolve a re-exported symbol if it is the same
// as the current symbol
if (name == symbol->GetReExportedSymbolName() && module == reexport_module_sp.get())
return NULL;
return FindGlobalDataSymbol(target, symbol->GetReExportedSymbolName(), reexport_module_sp.get());
}
}
break;
case eSymbolTypeCode: // We already lookup functions elsewhere
case eSymbolTypeVariable:
case eSymbolTypeLocal:
case eSymbolTypeParam:
case eSymbolTypeTrampoline:
case eSymbolTypeInvalid:
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 eSymbolTypeResolver:
break;
}
}
}
}
return NULL;
}
lldb::VariableSP
ClangExpressionDeclMap::FindGlobalVariable
(
Target &target,
ModuleSP &module,
const ConstString &name,
CompilerDeclContext *namespace_decl,
TypeFromUser *type
)
{
VariableList vars;
if (module && namespace_decl)
module->FindGlobalVariables (name, namespace_decl, true, -1, vars);
else
target.GetImages().FindGlobalVariables(name, true, -1, vars);
if (vars.GetSize())
{
if (type)
{
for (size_t i = 0; i < vars.GetSize(); ++i)
{
VariableSP var_sp = vars.GetVariableAtIndex(i);
if (ClangASTContext::AreTypesSame(*type, var_sp->GetType()->GetFullCompilerType ()))
return var_sp;
}
}
else
{
return vars.GetVariableAtIndex(0);
}
}
return VariableSP();
}
ClangASTContext *
ClangExpressionDeclMap::GetClangASTContext ()
{
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<ClangASTContext>(frame_decl_context.GetTypeSystem());
}
// Interface for ClangASTSource
void
ClangExpressionDeclMap::FindExternalVisibleDecls (NameSearchContext &context)
{
assert (m_ast_context);
ClangASTMetrics::RegisterVisibleQuery();
const ConstString name(context.m_decl_name.getAsString().c_str());
Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_EXPRESSIONS));
if (GetImportInProgress())
{
if (log && log->GetVerbose())
log->Printf("Ignoring a query during an import");
return;
}
static unsigned int invocation_id = 0;
unsigned int current_id = invocation_id++;
if (log)
{
if (!context.m_decl_context)
log->Printf("ClangExpressionDeclMap::FindExternalVisibleDecls[%u] for '%s' in a NULL DeclContext", current_id, name.GetCString());
else if (const NamedDecl *context_named_decl = dyn_cast<NamedDecl>(context.m_decl_context))
log->Printf("ClangExpressionDeclMap::FindExternalVisibleDecls[%u] for '%s' in '%s'", current_id, name.GetCString(), context_named_decl->getNameAsString().c_str());
else
log->Printf("ClangExpressionDeclMap::FindExternalVisibleDecls[%u] for '%s' in a '%s'", current_id, name.GetCString(), context.m_decl_context->getDeclKindName());
}
if (const NamespaceDecl *namespace_context = dyn_cast<NamespaceDecl>(context.m_decl_context))
{
if (namespace_context->getName().str() == std::string(g_lldb_local_vars_namespace_cstr))
{
CompilerDeclContext compiler_decl_ctx(GetClangASTContext(), const_cast<void *>(static_cast<const void *>(context.m_decl_context)));
FindExternalVisibleDecls(context, lldb::ModuleSP(), compiler_decl_ctx, current_id);
return;
}
ClangASTImporter::NamespaceMapSP namespace_map = m_ast_importer_sp->GetNamespaceMap(namespace_context);
if (log && log->GetVerbose())
log->Printf(" CEDM::FEVD[%u] Inspecting (NamespaceMap*)%p (%d entries)",
current_id, static_cast<void*>(namespace_map.get()),
(int)namespace_map->size());
if (!namespace_map)
return;
for (ClangASTImporter::NamespaceMap::iterator i = namespace_map->begin(), e = namespace_map->end();
i != e;
++i)
{
if (log)
log->Printf(" CEDM::FEVD[%u] Searching namespace %s in module %s",
current_id,
i->second.GetName().AsCString(),
i->first->GetFileSpec().GetFilename().GetCString());
FindExternalVisibleDecls(context,
i->first,
i->second,
current_id);
}
}
else if (isa<TranslationUnitDecl>(context.m_decl_context))
{
CompilerDeclContext namespace_decl;
if (log)
log->Printf(" CEDM::FEVD[%u] Searching the root namespace", current_id);
FindExternalVisibleDecls(context,
lldb::ModuleSP(),
namespace_decl,
current_id);
}
if (!context.m_found.variable && !context.m_found.local_vars_nsp)
ClangASTSource::FindExternalVisibleDecls(context);
}
void
ClangExpressionDeclMap::FindExternalVisibleDecls (NameSearchContext &context,
lldb::ModuleSP module_sp,
CompilerDeclContext &namespace_decl,
unsigned int current_id)
{
assert (m_ast_context);
std::function<void (clang::FunctionDecl *)> MaybeRegisterFunctionBody =
[this](clang::FunctionDecl *copied_function_decl)
{
if (copied_function_decl->getBody() && m_parser_vars->m_code_gen)
{
DeclGroupRef decl_group_ref(copied_function_decl);
m_parser_vars->m_code_gen->HandleTopLevelDecl(decl_group_ref);
}
};
Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_EXPRESSIONS));
SymbolContextList sc_list;
const ConstString name(context.m_decl_name.getAsString().c_str());
const char *name_unique_cstr = name.GetCString();
if (name_unique_cstr == NULL)
return;
static ConstString id_name("id");
static ConstString Class_name("Class");
if (name == id_name || name == Class_name)
return;
// Only look for functions by name out in our symbols if the function
// doesn't start with our phony prefix of '$'
Target *target = m_parser_vars->m_exe_ctx.GetTargetPtr();
StackFrame *frame = m_parser_vars->m_exe_ctx.GetFramePtr();
SymbolContext sym_ctx;
if (frame != nullptr)
sym_ctx = frame->GetSymbolContext(lldb::eSymbolContextFunction|lldb::eSymbolContextBlock);
// Try the persistent decls, which take precedence over all else.
if (!namespace_decl)
{
do
{
if (!target)
break;
ClangASTContext *scratch_clang_ast_context = target->GetScratchClangASTContext();
if (!scratch_clang_ast_context)
break;
ASTContext *scratch_ast_context = scratch_clang_ast_context->getASTContext();
if (!scratch_ast_context)
break;
NamedDecl *persistent_decl = m_parser_vars->m_persistent_vars->GetPersistentDecl(name);
if (!persistent_decl)
break;
Decl *parser_persistent_decl = m_ast_importer_sp->CopyDecl(m_ast_context, scratch_ast_context, persistent_decl);
if (!parser_persistent_decl)
break;
NamedDecl *parser_named_decl = dyn_cast<NamedDecl>(parser_persistent_decl);
if (!parser_named_decl)
break;
if (clang::FunctionDecl *parser_function_decl = llvm::dyn_cast<clang::FunctionDecl>(parser_named_decl))
{
MaybeRegisterFunctionBody(parser_function_decl);
}
if (log)
log->Printf(" CEDM::FEVD[%u] Found persistent decl %s", current_id, name.GetCString());
context.AddNamedDecl(parser_named_decl);
} while (0);
}
if (name_unique_cstr[0] == '$' && !namespace_decl)
{
static ConstString g_lldb_class_name ("$__lldb_class");
if (name == g_lldb_class_name)
{
// Clang is looking for the type of "this"
if (frame == NULL)
return;
// 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 = ClangASTContext::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(),
ClangASTContext::GetASTContext(&class_decl->getASTContext()));
if (log)
{
ASTDumper ast_dumper(class_qual_type);
log->Printf(" CEDM::FEVD[%u] Adding type for $__lldb_class: %s", current_id, ast_dumper.GetCString());
}
AddThisType(context, class_user_type, current_id);
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(),
ClangASTContext::GetASTContext(&method_decl->getASTContext()));
m_struct_vars->m_object_pointer_type = self_user_type;
}
}
else
{
// 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();
if (pointee_type.IsValid())
{
if (log)
{
ASTDumper ast_dumper(pointee_type);
log->Printf(" FEVD[%u] Adding type for $__lldb_class: %s", current_id, ast_dumper.GetCString());
}
AddThisType(context, pointee_type, current_id);
TypeFromUser this_user_type(this_type->GetFullCompilerType ());
m_struct_vars->m_object_pointer_type = this_user_type;
return;
}
}
}
return;
}
static ConstString g_lldb_objc_class_name ("$__lldb_objc_class");
if (name == g_lldb_objc_class_name)
{
// Clang is looking for the type of "*self"
if (!frame)
return;
SymbolContext sym_ctx = frame->GetSymbolContext(lldb::eSymbolContextFunction|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 = ClangASTContext::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(),
ClangASTContext::GetASTContext(&method_decl->getASTContext()));
if (log)
{
ASTDumper ast_dumper(interface_type);
log->Printf(" FEVD[%u] Adding type for $__lldb_objc_class: %s", current_id, ast_dumper.GetCString());
}
AddOneType(context, class_user_type, current_id);
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(),
ClangASTContext::GetASTContext(&method_decl->getASTContext()));
m_struct_vars->m_object_pointer_type = self_user_type;
}
else
{
// self is a Class pointer
QualType class_type = method_decl->getASTContext().getObjCClassType();
TypeFromUser self_user_type(class_type.getAsOpaquePtr(),
ClangASTContext::GetASTContext(&method_decl->getASTContext()));
m_struct_vars->m_object_pointer_type = self_user_type;
}
return;
}
else
{
// 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 &&
self_var->IsInScope(frame) &&
self_var->LocationIsValidForFrame (frame))
{
Type *self_type = self_var->GetType();
if (!self_type)
return;
CompilerType self_clang_type = self_type->GetFullCompilerType ();
if (ClangASTContext::IsObjCClassType(self_clang_type))
{
return;
}
else if (ClangASTContext::IsObjCObjectPointerType(self_clang_type))
{
self_clang_type = self_clang_type.GetPointeeType();
if (!self_clang_type)
return;
if (log)
{
ASTDumper ast_dumper(self_type->GetFullCompilerType ());
log->Printf(" FEVD[%u] Adding type for $__lldb_objc_class: %s", current_id, ast_dumper.GetCString());
}
TypeFromUser class_user_type (self_clang_type);
AddOneType(context, class_user_type, current_id);
TypeFromUser self_user_type(self_type->GetFullCompilerType ());
m_struct_vars->m_object_pointer_type = self_user_type;
return;
}
}
}
return;
}
if (name == ConstString(g_lldb_local_vars_namespace_cstr))
{
CompilerDeclContext frame_decl_context = sym_ctx.block != nullptr ?
sym_ctx.block->GetDeclContext() :
CompilerDeclContext();
if (frame_decl_context)
{
ClangASTContext *ast = llvm::dyn_cast_or_null<ClangASTContext>(frame_decl_context.GetTypeSystem());
if (ast)
{
clang::NamespaceDecl *namespace_decl = ClangASTContext::GetUniqueNamespaceDeclaration(
m_ast_context, name_unique_cstr, nullptr);
if (namespace_decl)
{
context.AddNamedDecl(namespace_decl);
clang::DeclContext *clang_decl_ctx = clang::Decl::castToDeclContext(namespace_decl);
clang_decl_ctx->setHasExternalVisibleStorage(true);
context.m_found.local_vars_nsp = true;
}
}
}
return;
}
// any other $__lldb names should be weeded out now
if (!::strncmp(name_unique_cstr, "$__lldb", sizeof("$__lldb") - 1))
return;
ExpressionVariableSP pvar_sp(m_parser_vars->m_persistent_vars->GetVariable(name));
if (pvar_sp)
{
AddOneVariable(context, pvar_sp, current_id);
return;
}
const char *reg_name(&name.GetCString()[1]);
if (m_parser_vars->m_exe_ctx.GetRegisterContext())
{
const RegisterInfo *reg_info(m_parser_vars->m_exe_ctx.GetRegisterContext()->GetRegisterInfoByName(reg_name));
if (reg_info)
{
if (log)
log->Printf(" CEDM::FEVD[%u] Found register %s", current_id, reg_info->name);
AddOneRegister(context, reg_info, current_id);
}
}
}
else
{
ValueObjectSP valobj;
VariableSP var;
bool local_var_lookup = !namespace_decl ||
(namespace_decl.GetName() == ConstString(g_lldb_local_vars_namespace_cstr));
if (frame && local_var_lookup)
{
CompilerDeclContext compiler_decl_context = sym_ctx.block != nullptr ? sym_ctx.block->GetDeclContext() : CompilerDeclContext();
if (compiler_decl_context)
{
// Make sure that the variables are parsed so that we have the declarations.
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 = compiler_decl_context.FindDeclByName(name, namespace_decl.IsValid());
bool variable_found = false;
for (CompilerDecl decl : found_decls)
{
var = decl.GetAsVariable();
if (var)
{
variable_found = true;
valobj = ValueObjectVariable::Create(frame, var);
AddOneVariable(context, var, valobj, current_id);
context.m_found.variable = true;
}
}
if (variable_found)
return;
}
}
if (target)
{
var = FindGlobalVariable (*target,
module_sp,
name,
&namespace_decl,
NULL);
if (var)
{
valobj = ValueObjectVariable::Create(target, var);
AddOneVariable(context, var, valobj, current_id);
context.m_found.variable = true;
return;
}
}
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);
}
}
if (!context.m_found.variable)
{
const bool include_inlines = false;
const bool append = false;
if (namespace_decl && module_sp)
{
const bool include_symbols = false;
module_sp->FindFunctions(name,
&namespace_decl,
eFunctionNameTypeBase,
include_symbols,
include_inlines,
append,
sc_list);
}
else if (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,
include_symbols,
include_inlines,
append,
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)
{
clang::DeclContext *frame_decl_ctx = (clang::DeclContext *)frame_decl_context.GetOpaqueDeclContext();
ClangASTContext *ast = llvm::dyn_cast_or_null<ClangASTContext>(frame_decl_context.GetTypeSystem());
// Structure to hold the info needed when comparing function
// declarations.
struct FuncDeclInfo
{
ConstString m_name;
CompilerType m_copied_type;
uint32_t m_decl_lvl;
SymbolContext m_sym_ctx;
};
// 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.
SymbolContextList sc_sym_list;
uint32_t num_indices = sc_list.GetSize();
std::vector<FuncDeclInfo> fdi_cache;
fdi_cache.reserve(num_indices);
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);
}
fdi_cache.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 : fdi_cache)
{
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_list = sc_func_list;
sc_list.Append(sc_sym_list);
}
}
if (sc_list.GetSize())
{
Symbol *extern_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)
{
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, NULL, current_id);
context.m_found.function_with_type_info = true;
context.m_found.function = true;
}
else if (sym_ctx.symbol)
{
if (sym_ctx.symbol->GetType() == eSymbolTypeReExported && target)
{
sym_ctx.symbol = sym_ctx.symbol->ResolveReExportedSymbol(*target);
if (sym_ctx.symbol == NULL)
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<FunctionDecl>(m_ast_importer_sp->CopyDecl(m_ast_context, &decl->getASTContext(), 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, NULL, extern_symbol, current_id);
context.m_found.function = true;
}
else if (non_extern_symbol)
{
AddOneFunction (context, NULL, non_extern_symbol, current_id);
context.m_found.function = true;
}
}
}
if (!context.m_found.function_with_type_info)
{
// Try the modules next.
do
{
if (ClangModulesDeclVendor *modules_decl_vendor = m_target->GetClangModulesDeclVendor())
{
bool append = false;
uint32_t max_matches = 1;
std::vector <clang::NamedDecl *> decls;
if (!modules_decl_vendor->FindDecls(name,
append,
max_matches,
decls))
break;
clang::NamedDecl *const decl_from_modules = decls[0];
if (llvm::isa<clang::FunctionDecl>(decl_from_modules))
{
if (log)
{
log->Printf(" CAS::FEVD[%u] Matching function found for \"%s\" in the modules",
current_id,
name.GetCString());
}
clang::Decl *copied_decl = m_ast_importer_sp->CopyDecl(m_ast_context, &decl_from_modules->getASTContext(), decl_from_modules);
clang::FunctionDecl *copied_function_decl = copied_decl ? dyn_cast<clang::FunctionDecl>(copied_decl) : nullptr;
if (!copied_function_decl)
{
if (log)
log->Printf(" CAS::FEVD[%u] - Couldn't export a function declaration from the modules",
current_id);
break;
}
MaybeRegisterFunctionBody(copied_function_decl);
context.AddNamedDecl(copied_function_decl);
context.m_found.function_with_type_info = true;
context.m_found.function = true;
}
else if (llvm::isa<clang::VarDecl>(decl_from_modules))
{
if (log)
{
log->Printf(" CAS::FEVD[%u] Matching variable found for \"%s\" in the modules",
current_id,
name.GetCString());
}
clang::Decl *copied_decl = m_ast_importer_sp->CopyDecl(m_ast_context, &decl_from_modules->getASTContext(), decl_from_modules);
clang::VarDecl *copied_var_decl = copied_decl ? dyn_cast_or_null<clang::VarDecl>(copied_decl) : nullptr;
if (!copied_var_decl)
{
if (log)
log->Printf(" CAS::FEVD[%u] - Couldn't export a variable declaration from the modules",
current_id);
break;
}
context.AddNamedDecl(copied_var_decl);
context.m_found.variable = true;
}
}
} while (0);
}
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.
const Symbol *data_symbol = FindGlobalDataSymbol(*target, name);
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, current_id);
context.m_found.variable = true;
}
}
}
}
}
//static opaque_compiler_type_t
//MaybePromoteToBlockPointerType
//(
// ASTContext *ast_context,
// opaque_compiler_type_t candidate_type
//)
//{
// if (!candidate_type)
// return candidate_type;
//
// QualType candidate_qual_type = QualType::getFromOpaquePtr(candidate_type);
//
// const PointerType *candidate_pointer_type = dyn_cast<PointerType>(candidate_qual_type);
//
// if (!candidate_pointer_type)
// return candidate_type;
//
// QualType pointee_qual_type = candidate_pointer_type->getPointeeType();
//
// const RecordType *pointee_record_type = dyn_cast<RecordType>(pointee_qual_type);
//
// if (!pointee_record_type)
// return candidate_type;
//
// RecordDecl *pointee_record_decl = pointee_record_type->getDecl();
//
// if (!pointee_record_decl->isRecord())
// return candidate_type;
//
// if (!pointee_record_decl->getName().startswith(llvm::StringRef("__block_literal_")))
// return candidate_type;
//
// QualType generic_function_type = ast_context->getFunctionNoProtoType(ast_context->UnknownAnyTy);
// QualType block_pointer_type = ast_context->getBlockPointerType(generic_function_type);
//
// return block_pointer_type.getAsOpaquePtr();
//}
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)
{
if (log)
log->PutCString("Skipped a definition because it has no type");
return false;
}
CompilerType var_clang_type = var_type->GetFullCompilerType ();
if (!var_clang_type)
{
if (log)
log->PutCString("Skipped a definition because it has no Clang type");
return false;
}
ClangASTContext *clang_ast = llvm::dyn_cast_or_null<ClangASTContext>(var_type->GetForwardCompilerType().GetTypeSystem());
if (!clang_ast)
{
if (log)
log->PutCString("Skipped a definition because it has no Clang AST");
return false;
}
ASTContext *ast = clang_ast->getASTContext();
if (!ast)
{
if (log)
log->PutCString("There is no AST context for the current execution context");
return false;
}
//var_clang_type = MaybePromoteToBlockPointerType (ast, var_clang_type);
DWARFExpression &var_location_expr = var->LocationExpression();
Target *target = m_parser_vars->m_exe_ctx.GetTargetPtr();
Error 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
{
if (log)
log->Printf("Error evaluating constant variable: %s", err.AsCString());
return false;
}
}
CompilerType type_to_use = GuardedCopyType(var_clang_type);
if (!type_to_use)
{
if (log)
log->Printf("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, unsigned int current_id)
{
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 = NULL;
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_parser_type = pt;
parser_vars->m_named_decl = var_decl;
parser_vars->m_llvm_value = NULL;
parser_vars->m_lldb_value = var_location;
parser_vars->m_lldb_var = var;
if (is_reference)
entity->m_flags |= ClangExpressionVariable::EVTypeIsReference;
if (log)
{
ASTDumper orig_dumper(ut.GetOpaqueQualType());
ASTDumper ast_dumper(var_decl);
log->Printf(" CEDM::FEVD[%u] Found variable %s, returned %s (original %s)", current_id, decl_name.c_str(), ast_dumper.GetCString(), orig_dumper.GetCString());
}
}
void
ClangExpressionDeclMap::AddOneVariable(NameSearchContext &context,
ExpressionVariableSP &pvar_sp,
unsigned int current_id)
{
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())
{
if (log)
log->Printf(" CEDM::FEVD[%u] Couldn't import type for pvar %s", current_id, pvar_sp->GetName().GetCString());
return;
}
NamedDecl *var_decl = context.AddVarDecl(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_parser_type = parser_type;
parser_vars->m_named_decl = var_decl;
parser_vars->m_llvm_value = NULL;
parser_vars->m_lldb_value.Clear();
if (log)
{
ASTDumper ast_dumper(var_decl);
log->Printf(" CEDM::FEVD[%u] Added pvar %s, returned %s", current_id, pvar_sp->GetName().GetCString(), ast_dumper.GetCString());
}
}
void
ClangExpressionDeclMap::AddOneGenericVariable(NameSearchContext &context,
const Symbol &symbol,
unsigned int current_id)
{
assert(m_parser_vars.get());
Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_EXPRESSIONS));
Target *target = m_parser_vars->m_exe_ctx.GetTargetPtr();
if (target == NULL)
return;
ASTContext *scratch_ast_context = target->GetScratchClangASTContext()->getASTContext();
TypeFromUser user_type (ClangASTContext::GetBasicType(scratch_ast_context, eBasicTypeVoid).GetPointerType().GetLValueReferenceType());
TypeFromParser parser_type (ClangASTContext::GetBasicType(m_ast_context, 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_parser_type = parser_type;
parser_vars->m_named_decl = var_decl;
parser_vars->m_llvm_value = NULL;
parser_vars->m_lldb_sym = &symbol;
if (log)
{
ASTDumper ast_dumper(var_decl);
log->Printf(" CEDM::FEVD[%u] Found variable %s, returned %s", current_id, decl_name.c_str(), ast_dumper.GetCString());
}
}
bool
ClangExpressionDeclMap::ResolveUnknownTypes()
{
Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_EXPRESSIONS));
Target *target = m_parser_vars->m_exe_ctx.GetTargetPtr();
ClangASTContext *scratch_ast_context = target->GetScratchClangASTContext();
for (size_t index = 0, num_entities = m_found_entities.GetSize();
index < num_entities;
++index)
{
ExpressionVariableSP entity = m_found_entities.GetVariableAtIndex(index);
ClangExpressionVariable::ParserVars *parser_vars = llvm::cast<ClangExpressionVariable>(entity.get())->GetParserVars(GetParserID());
if (entity->m_flags & ClangExpressionVariable::EVUnknownType)
{
const NamedDecl *named_decl = parser_vars->m_named_decl;
const VarDecl *var_decl = dyn_cast<VarDecl>(named_decl);
if (!var_decl)
{
if (log)
log->Printf("Entity of unknown type does not have a VarDecl");
return false;
}
if (log)
{
ASTDumper ast_dumper(const_cast<VarDecl*>(var_decl));
log->Printf("Variable of unknown type now has Decl %s", ast_dumper.GetCString());
}
QualType var_type = var_decl->getType();
TypeFromParser parser_type(var_type.getAsOpaquePtr(), ClangASTContext::GetASTContext(&var_decl->getASTContext()));
lldb::opaque_compiler_type_t copied_type = m_ast_importer_sp->CopyType(scratch_ast_context->getASTContext(), &var_decl->getASTContext(), var_type.getAsOpaquePtr());
if (!copied_type)
{
if (log)
log->Printf("ClangExpressionDeclMap::ResolveUnknownType - Couldn't import the type for a variable");
return (bool) lldb::ExpressionVariableSP();
}
TypeFromUser user_type(copied_type, scratch_ast_context);
// parser_vars->m_lldb_value.SetContext(Value::eContextTypeClangType, user_type.GetOpaqueQualType());
parser_vars->m_lldb_value.SetCompilerType(user_type);
parser_vars->m_parser_type = parser_type;
entity->SetCompilerType(user_type);
entity->m_flags &= ~(ClangExpressionVariable::EVUnknownType);
}
}
return true;
}
void
ClangExpressionDeclMap::AddOneRegister (NameSearchContext &context,
const RegisterInfo *reg_info,
unsigned int current_id)
{
Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_EXPRESSIONS));
CompilerType clang_type = ClangASTContext::GetBuiltinTypeForEncodingAndBitSize (m_ast_context,
reg_info->encoding,
reg_info->byte_size * 8);
if (!clang_type)
{
if (log)
log->Printf(" Tried to add a type for %s, but couldn't get one", context.m_decl_name.getAsString().c_str());
return;
}
TypeFromParser parser_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_parser_type = parser_clang_type;
parser_vars->m_named_decl = var_decl;
parser_vars->m_llvm_value = NULL;
parser_vars->m_lldb_value.Clear();
entity->m_flags |= ClangExpressionVariable::EVBareRegister;
if (log)
{
ASTDumper ast_dumper(var_decl);
log->Printf(" CEDM::FEVD[%d] Added register %s, returned %s", current_id, context.m_decl_name.getAsString().c_str(), ast_dumper.GetCString());
}
}
void
ClangExpressionDeclMap::AddOneFunction (NameSearchContext &context,
Function* function,
Symbol* symbol,
unsigned int current_id)
{
assert (m_parser_vars.get());
Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_EXPRESSIONS));
NamedDecl *function_decl = NULL;
Address fun_address;
CompilerType function_clang_type;
bool is_indirect_function = false;
if (function)
{
Type *function_type = function->GetType();
const lldb::LanguageType comp_unit_language = function->GetCompileUnit()->GetLanguage();
const bool extern_c = Language::LanguageIsC(comp_unit_language) ||
(Language::LanguageIsObjC(comp_unit_language) &&
!Language::LanguageIsCPlusPlus(comp_unit_language));
if (!extern_c)
{
TypeSystem *type_system = function->GetDeclContext().GetTypeSystem();
if (ClangASTContext *src_ast = llvm::dyn_cast<ClangASTContext>(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)
{
if (clang::FunctionDecl *copied_function_decl = llvm::dyn_cast_or_null<clang::FunctionDecl>(m_ast_importer_sp->CopyDecl(m_ast_context, src_ast->getASTContext(), src_function_decl)))
{
if (log)
{
ASTDumper ast_dumper((clang::Decl*)copied_function_decl);
StreamString ss;
function->DumpSymbolContext(&ss);
log->Printf(" CEDM::FEVD[%u] Imported decl for function %s (description %s), returned %s",
current_id,
copied_function_decl->getName().str().c_str(),
ss.GetData(),
ast_dumper.GetCString());
}
context.AddNamedDecl(copied_function_decl);
return;
}
else
{
if (log)
{
log->Printf (" Failed to import the function decl for '%s'",
src_function_decl->getName().str().c_str());
}
}
}
}
}
if (!function_type)
{
if (log)
log->PutCString(" Skipped a function because it has no type");
return;
}
function_clang_type = function_type->GetFullCompilerType ();
if (!function_clang_type)
{
if (log)
log->PutCString(" 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)
{
if (log)
{
log->Printf (" Failed to create a function decl for '%s' {0x%8.8" PRIx64 "}",
function_type->GetName().GetCString(),
function_type->GetID());
}
return;
}
}
else
{
// We failed to copy the type we found
if (log)
{
log->Printf (" Failed to import the function type '%s' {0x%8.8" PRIx64 "} into the expression parser AST contenxt",
function_type->GetName().GetCString(),
function_type->GetID());
}
return;
}
}
else if (symbol)
{
fun_address = symbol->GetAddress();
function_decl = context.AddGenericFunDecl();
is_indirect_function = symbol->IsIndirect();
}
else
{
if (log)
log->PutCString(" AddOneFunction called with no function and no symbol");
return;
}
Target *target = m_parser_vars->m_exe_ctx.GetTargetPtr();
lldb::addr_t load_addr = fun_address.GetCallableLoadAddress(target, 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 = NULL;
if (log)
{
ASTDumper ast_dumper(function_decl);
StreamString ss;
fun_address.Dump(&ss, m_parser_vars->m_exe_ctx.GetBestExecutionContextScope(), Address::DumpStyleResolvedDescription);
log->Printf(" CEDM::FEVD[%u] Found %s function %s (description %s), returned %s",
current_id,
(function ? "specific" : "generic"),
decl_name.c_str(),
ss.GetData(),
ast_dumper.GetCString());
}
}
void
ClangExpressionDeclMap::AddThisType(NameSearchContext &context,
TypeFromUser &ut,
unsigned int current_id)
{
CompilerType copied_clang_type = GuardedCopyType(ut);
Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_EXPRESSIONS));
if (!copied_clang_type)
{
if (log)
log->Printf("ClangExpressionDeclMap::AddThisType - Couldn't import the type");
return;
}
if (copied_clang_type.IsAggregateType() && copied_clang_type.GetCompleteType ())
{
CompilerType void_clang_type = ClangASTContext::GetBasicType(m_ast_context, eBasicTypeVoid);
CompilerType void_ptr_clang_type = void_clang_type.GetPointerType();
CompilerType method_type = ClangASTContext::CreateFunctionType (m_ast_context,
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 = ClangASTContext::GetASTContext(m_ast_context)->
AddMethodToCXXRecordType (copied_clang_type.GetOpaqueQualType(),
"$__lldb_expr",
method_type,
lldb::eAccessPublic,
is_virtual,
is_static,
is_inline,
is_explicit,
is_attr_used,
is_artificial);
if (log)
{
ASTDumper method_ast_dumper((clang::Decl*)method_decl);
ASTDumper type_ast_dumper(copied_clang_type);
log->Printf(" CEDM::AddThisType Added function $__lldb_expr (description %s) for this type %s",
method_ast_dumper.GetCString(),
type_ast_dumper.GetCString());
}
}
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,
TypeFromUser &ut,
unsigned int current_id)
{
CompilerType copied_clang_type = GuardedCopyType(ut);
if (!copied_clang_type)
{
Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_EXPRESSIONS));
if (log)
log->Printf("ClangExpressionDeclMap::AddOneType - Couldn't import the type");
return;
}
context.AddTypeDecl(copied_clang_type);
}
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