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Diffstat (limited to 'source/Expression/ASTStructExtractor.cpp')
| -rw-r--r-- | source/Expression/ASTStructExtractor.cpp | 220 |
1 files changed, 220 insertions, 0 deletions
diff --git a/source/Expression/ASTStructExtractor.cpp b/source/Expression/ASTStructExtractor.cpp new file mode 100644 index 000000000000..d1f21923deb4 --- /dev/null +++ b/source/Expression/ASTStructExtractor.cpp @@ -0,0 +1,220 @@ +//===-- ASTStructExtractor.cpp ----------------------------------*- C++ -*-===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// + +#include "stdlib.h" +#include "clang/AST/ASTContext.h" +#include "clang/AST/Decl.h" +#include "clang/AST/DeclCXX.h" +#include "clang/AST/DeclGroup.h" +#include "clang/AST/Expr.h" +#include "clang/AST/RecordLayout.h" +#include "clang/AST/Stmt.h" +#include "clang/Parse/Parser.h" +#include "clang/Sema/Sema.h" +#include "llvm/Support/Casting.h" +#include "llvm/Support/raw_ostream.h" +#include "lldb/Core/Log.h" +#include "lldb/Expression/ASTStructExtractor.h" + +using namespace llvm; +using namespace clang; +using namespace lldb_private; + +ASTStructExtractor::ASTStructExtractor(ASTConsumer *passthrough, + const char *struct_name, + ClangFunction &function) : + m_ast_context (NULL), + m_passthrough (passthrough), + m_passthrough_sema (NULL), + m_sema (NULL), + m_action (NULL), + m_function (function), + m_struct_name (struct_name) +{ + if (!m_passthrough) + return; + + m_passthrough_sema = dyn_cast<SemaConsumer>(passthrough); +} + +ASTStructExtractor::~ASTStructExtractor() +{ +} + +void +ASTStructExtractor::Initialize(ASTContext &Context) +{ + m_ast_context = &Context; + + if (m_passthrough) + m_passthrough->Initialize(Context); +} + +void +ASTStructExtractor::ExtractFromFunctionDecl(FunctionDecl *F) +{ + if (!F->hasBody()) + return; + + Stmt *body_stmt = F->getBody(); + CompoundStmt *body_compound_stmt = dyn_cast<CompoundStmt>(body_stmt); + + if (!body_compound_stmt) + return; // do we have to handle this? + + RecordDecl *struct_decl = NULL; + + StringRef desired_name(m_struct_name.c_str()); + + for (CompoundStmt::const_body_iterator bi = body_compound_stmt->body_begin(), be = body_compound_stmt->body_end(); + bi != be; + ++bi) + { + Stmt *curr_stmt = *bi; + DeclStmt *curr_decl_stmt = dyn_cast<DeclStmt>(curr_stmt); + if (!curr_decl_stmt) + continue; + DeclGroupRef decl_group = curr_decl_stmt->getDeclGroup(); + for (Decl *candidate_decl : decl_group) + { + RecordDecl *candidate_record_decl = dyn_cast<RecordDecl>(candidate_decl); + if (!candidate_record_decl) + continue; + if (candidate_record_decl->getName() == desired_name) + { + struct_decl = candidate_record_decl; + break; + } + } + if (struct_decl) + break; + } + + if (!struct_decl) + return; + + const ASTRecordLayout* struct_layout(&m_ast_context->getASTRecordLayout (struct_decl)); + + if (!struct_layout) + return; + + m_function.m_struct_size = struct_layout->getSize().getQuantity(); // TODO Store m_struct_size as CharUnits + m_function.m_return_offset = struct_layout->getFieldOffset(struct_layout->getFieldCount() - 1) / 8; + m_function.m_return_size = struct_layout->getDataSize().getQuantity() - m_function.m_return_offset; + + for (unsigned field_index = 0, num_fields = struct_layout->getFieldCount(); + field_index < num_fields; + ++field_index) + { + m_function.m_member_offsets.push_back(struct_layout->getFieldOffset(field_index) / 8); + } + + m_function.m_struct_valid = true; +} + +void +ASTStructExtractor::ExtractFromTopLevelDecl(Decl* D) +{ + LinkageSpecDecl *linkage_spec_decl = dyn_cast<LinkageSpecDecl>(D); + + if (linkage_spec_decl) + { + RecordDecl::decl_iterator decl_iterator; + + for (decl_iterator = linkage_spec_decl->decls_begin(); + decl_iterator != linkage_spec_decl->decls_end(); + ++decl_iterator) + { + ExtractFromTopLevelDecl(*decl_iterator); + } + } + + FunctionDecl *function_decl = dyn_cast<FunctionDecl>(D); + + if (m_ast_context && + function_decl && + !m_function.m_wrapper_function_name.compare(function_decl->getNameAsString().c_str())) + { + ExtractFromFunctionDecl(function_decl); + } +} + +bool +ASTStructExtractor::HandleTopLevelDecl(DeclGroupRef D) +{ + DeclGroupRef::iterator decl_iterator; + + for (decl_iterator = D.begin(); + decl_iterator != D.end(); + ++decl_iterator) + { + Decl *decl = *decl_iterator; + + ExtractFromTopLevelDecl(decl); + } + + if (m_passthrough) + return m_passthrough->HandleTopLevelDecl(D); + return true; +} + +void +ASTStructExtractor::HandleTranslationUnit(ASTContext &Ctx) +{ + if (m_passthrough) + m_passthrough->HandleTranslationUnit(Ctx); +} + +void +ASTStructExtractor::HandleTagDeclDefinition(TagDecl *D) +{ + if (m_passthrough) + m_passthrough->HandleTagDeclDefinition(D); +} + +void +ASTStructExtractor::CompleteTentativeDefinition(VarDecl *D) +{ + if (m_passthrough) + m_passthrough->CompleteTentativeDefinition(D); +} + +void +ASTStructExtractor::HandleVTable(CXXRecordDecl *RD, bool DefinitionRequired) +{ + if (m_passthrough) + m_passthrough->HandleVTable(RD, DefinitionRequired); +} + +void +ASTStructExtractor::PrintStats() +{ + if (m_passthrough) + m_passthrough->PrintStats(); +} + +void +ASTStructExtractor::InitializeSema(Sema &S) +{ + m_sema = &S; + m_action = reinterpret_cast<Action*>(m_sema); + + if (m_passthrough_sema) + m_passthrough_sema->InitializeSema(S); +} + +void +ASTStructExtractor::ForgetSema() +{ + m_sema = NULL; + m_action = NULL; + + if (m_passthrough_sema) + m_passthrough_sema->ForgetSema(); +} |