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//===-- ClangASTSource.cpp ---------------------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "clang/AST/ASTContext.h"
#include "lldb/Core/Log.h"
#include "lldb/Expression/ClangASTSource.h"
#include "lldb/Expression/ClangExpression.h"
#include "lldb/Expression/ClangExpressionDeclMap.h"
using namespace clang;
using namespace lldb_private;
ClangASTSource::~ClangASTSource() {}
void ClangASTSource::StartTranslationUnit(ASTConsumer *Consumer) {
// Tell Sema to ask us when looking into the translation unit's decl.
m_ast_context.getTranslationUnitDecl()->setHasExternalVisibleStorage();
m_ast_context.getTranslationUnitDecl()->setHasExternalLexicalStorage();
}
// These are only required for AST source that want to lazily load
// the declarations (or parts thereof) that they return.
Decl *ClangASTSource::GetExternalDecl(uint32_t) { return 0; }
Stmt *ClangASTSource::GetExternalDeclStmt(uint64_t) { return 0; }
// These are also optional, although it might help with ObjC
// debugging if we have respectable signatures. But a more
// efficient interface (that didn't require scanning all files
// for method signatures!) might help.
Selector ClangASTSource::GetExternalSelector(uint32_t) { return Selector(); }
uint32_t ClangASTSource::GetNumExternalSelectors() { return 0; }
CXXBaseSpecifier *ClangASTSource::GetExternalCXXBaseSpecifiers(uint64_t Offset) { return NULL; }
// The core lookup interface.
DeclContext::lookup_result ClangASTSource::FindExternalVisibleDeclsByName
(
const DeclContext *decl_ctx,
DeclarationName clang_decl_name
)
{
switch (clang_decl_name.getNameKind()) {
// Normal identifiers.
case DeclarationName::Identifier:
if (clang_decl_name.getAsIdentifierInfo()->getBuiltinID() != 0)
return SetNoExternalVisibleDeclsForName(decl_ctx, clang_decl_name);
break;
// Operator names. Not important for now.
case DeclarationName::CXXOperatorName:
case DeclarationName::CXXLiteralOperatorName:
return DeclContext::lookup_result();
// Using directives found in this context.
// Tell Sema we didn't find any or we'll end up getting asked a *lot*.
case DeclarationName::CXXUsingDirective:
return SetNoExternalVisibleDeclsForName(decl_ctx, clang_decl_name);
// These aren't looked up like this.
case DeclarationName::ObjCZeroArgSelector:
case DeclarationName::ObjCOneArgSelector:
case DeclarationName::ObjCMultiArgSelector:
return DeclContext::lookup_result();
// These aren't possible in the global context.
case DeclarationName::CXXConstructorName:
case DeclarationName::CXXDestructorName:
case DeclarationName::CXXConversionFunctionName:
return DeclContext::lookup_result();
}
std::string decl_name (clang_decl_name.getAsString());
if (!m_decl_map.GetLookupsEnabled())
{
// Wait until we see a '$' at the start of a name before we start doing
// any lookups so we can avoid lookup up all of the builtin types.
if (!decl_name.empty() && decl_name[0] == '$')
{
m_decl_map.SetLookupsEnabled ();
}
else
{
return SetNoExternalVisibleDeclsForName(decl_ctx, clang_decl_name);
}
}
ConstString const_decl_name(decl_name.c_str());
const char *uniqued_const_decl_name = const_decl_name.GetCString();
if (m_active_lookups.find (uniqued_const_decl_name) != m_active_lookups.end())
{
// We are currently looking up this name...
return DeclContext::lookup_result();
}
m_active_lookups.insert(uniqued_const_decl_name);
// static uint32_t g_depth = 0;
// ++g_depth;
// printf("[%5u] FindExternalVisibleDeclsByName() \"%s\"\n", g_depth, uniqued_const_decl_name);
llvm::SmallVector<NamedDecl*, 4> name_decls;
NameSearchContext name_search_context(*this, name_decls, clang_decl_name, decl_ctx);
m_decl_map.GetDecls(name_search_context, const_decl_name);
DeclContext::lookup_result result (SetExternalVisibleDeclsForName (decl_ctx, clang_decl_name, name_decls));
// --g_depth;
m_active_lookups.erase (uniqued_const_decl_name);
return result;
}
void ClangASTSource::MaterializeVisibleDecls(const DeclContext *DC)
{
return;
}
// This is used to support iterating through an entire lexical context,
// which isn't something the debugger should ever need to do.
bool ClangASTSource::FindExternalLexicalDecls(const DeclContext *DC,
bool (*isKindWeWant)(Decl::Kind),
llvm::SmallVectorImpl<Decl*> &Decls) {
// true is for error, that's good enough for me
return true;
}
clang::ASTContext *NameSearchContext::GetASTContext() {
return &m_ast_source.m_ast_context;
}
clang::NamedDecl *NameSearchContext::AddVarDecl(void *type) {
IdentifierInfo *ii = m_decl_name.getAsIdentifierInfo();
assert (type && "Type for variable must be non-NULL!");
clang::NamedDecl *Decl = VarDecl::Create(m_ast_source.m_ast_context,
const_cast<DeclContext*>(m_decl_context),
SourceLocation(),
ii,
QualType::getFromOpaquePtr(type),
0,
SC_Static,
SC_Static);
m_decls.push_back(Decl);
return Decl;
}
clang::NamedDecl *NameSearchContext::AddFunDecl (void *type) {
clang::FunctionDecl *func_decl = FunctionDecl::Create (m_ast_source.m_ast_context,
const_cast<DeclContext*>(m_decl_context),
SourceLocation(),
m_decl_name.getAsIdentifierInfo(),
QualType::getFromOpaquePtr(type),
NULL,
SC_Static,
SC_Static,
false,
true);
// We have to do more than just synthesize the FunctionDecl. We have to
// synthesize ParmVarDecls for all of the FunctionDecl's arguments. To do
// this, we raid the function's FunctionProtoType for types.
QualType qual_type (QualType::getFromOpaquePtr(type));
const FunctionProtoType *func_proto_type = qual_type->getAs<FunctionProtoType>();
if (func_proto_type)
{
unsigned NumArgs = func_proto_type->getNumArgs();
unsigned ArgIndex;
ParmVarDecl **param_var_decls = new ParmVarDecl*[NumArgs];
for (ArgIndex = 0; ArgIndex < NumArgs; ++ArgIndex)
{
QualType arg_qual_type (func_proto_type->getArgType(ArgIndex));
param_var_decls[ArgIndex] = ParmVarDecl::Create (m_ast_source.m_ast_context,
const_cast<DeclContext*>(m_decl_context),
SourceLocation(),
NULL,
arg_qual_type,
NULL,
SC_Static,
SC_Static,
NULL);
}
func_decl->setParams(param_var_decls, NumArgs);
delete [] param_var_decls;
}
m_decls.push_back(func_decl);
return func_decl;
}
clang::NamedDecl *NameSearchContext::AddGenericFunDecl()
{
QualType generic_function_type(m_ast_source.m_ast_context.getFunctionType (m_ast_source.m_ast_context.getSizeType(), // result
NULL, // argument types
0, // number of arguments
true, // variadic?
0, // type qualifiers
false, // has exception specification?
false, // has any exception specification?
0, // number of exceptions
NULL, // exceptions
FunctionType::ExtInfo())); // defaults for noreturn, regparm, calling convention
return AddFunDecl(generic_function_type.getAsOpaquePtr());
}
clang::NamedDecl *NameSearchContext::AddTypeDecl(void *type)
{
QualType qual_type = QualType::getFromOpaquePtr(type);
if (TagType *tag_type = dyn_cast<clang::TagType>(qual_type))
{
TagDecl *tag_decl = tag_type->getDecl();
m_decls.push_back(tag_decl);
return tag_decl;
}
else
{
return NULL;
}
}
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