CMakeLists.txt

@@ -1,16 +1,8 @@
 cmake_minimum_required(VERSION 3.17)
 project("C Analyzer")
 
-set(CMAKE_MODULE_PATH ${CMAKE_BINARY_DIR})
 set(CMAKE_CXX_STANDARD 17)
+
 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -Wextra -Wno-unused-parameter")
 
-option(WITH_TESTS "Build unit tests as well." OFF)
-
-add_subdirectory(op-finder-lib)
 add_subdirectory(op-finder)
-
-if(WITH_TESTS)
-    enable_testing()
-    add_subdirectory(op-finder-tests)
-endif()

README.md

@@ -1,13 +1,2 @@
 # masters-thesis
 
-## Building
-
-Conan is recommended. Otherwise you have to provide `Catch2_ROOT`
-and `nlohmann_json_ROOT` yourself.
-
-```shell
-> mkdir build
-> cd build
-> conan install .. --build=missing
-> cmake .. -DWITH_TESTS=ON -DClang_ROOT=${CLANG_ROOT} -DLLVM_ROOT=${LLVM_ROOT}
-```

conanfile.txt

@@ -1,6 +0,0 @@
-[requires]
-catch2/2.13.4
-nlohmann_json/3.9.1
-
-[generators]
-cmake_find_package

op-finder-lib/CMakeLists.txt

@@ -1,49 +0,0 @@
-cmake_minimum_required(VERSION 3.17)
-
-find_package(nlohmann_json REQUIRED)
-find_package(Clang REQUIRED)
-find_package(LLVM REQUIRED COMPONENTS Support Option Core)
-
-# LLVM is typically compiled without RTTI. Weird linker errors ensue if
-# you keep RTTI on and try to link.
-if (NOT LLVM_ENABLE_RTTI)
-    if (MSVC)
-        string(REGEX REPLACE "/GR" "" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
-        set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /GR-")
-    else ()
-        string(REGEX REPLACE "-frtti" "" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
-        set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fno-rtti")
-    endif ()
-endif ()
-
-llvm_map_components_to_libnames(llvm_libs support option core)
-
-add_library(op-finder-lib STATIC
-    src/OperationFinder.cpp
-    src/OperationStorage.cpp
-    src/OperationAstMatcher.cpp
-    src/OperationFinderAstVisitor.cpp
-    src/OperationFinderAstConsumer.cpp
-    src/OperationFinderAstAction.cpp
-    src/OperationLog.cpp)
-
-target_include_directories(op-finder-lib
-    PUBLIC
-        ${CMAKE_CURRENT_SOURCE_DIR}/include
-        ${LLVM_INCLUDE_DIRS}
-)
-
-target_compile_definitions(op-finder-lib
-    PUBLIC
-        ${LLVM_DEFINITIONS}
-)
-
-target_link_libraries(op-finder-lib
-    PUBLIC
-        nlohmann_json::nlohmann_json
-    PRIVATE
-        ${llvm_libs}
-        clangTooling
-        clangBasic
-        clangASTMatchers
-)

op-finder-tests/CMakeLists.txt

@@ -1,30 +0,0 @@
-cmake_minimum_required(VERSION 3.17)
-
-find_package(Catch2 REQUIRED)
-
-# LLVM is typically compiled without RTTI. Weird linker errors ensue if
-# you keep RTTI on and try to link.
-if (NOT LLVM_ENABLE_RTTI)
-    if (MSVC)
-        string(REGEX REPLACE "/GR" "" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
-        set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /GR-")
-    else ()
-        string(REGEX REPLACE "-frtti" "" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
-        set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fno-rtti")
-    endif ()
-endif ()
-
-add_executable(op-finder-tests
-    main.cpp
-    fixtures/RunOnCodeFixture.cpp
-    basic_operations.cpp
-    branches.cpp)
-
-target_link_libraries(op-finder-tests
-    PUBLIC
-        op-finder-lib
-        Catch2::Catch2)
-
-include(CTest)
-include(Catch)
-catch_discover_tests(op-finder-tests)

op-finder-tests/basic_operations.cpp

@@ -1,95 +0,0 @@
-//
-// Created by erki on 07.03.21.
-//
-
-#include <catch2/catch.hpp>
-
-#include "fixtures/RunOnCodeFixture.hpp"
-
-TEST_CASE("Finds binary operations", "[basic_operation]")
-{
-  auto binary_operand = GENERATE(std::string("="), std::string("+"), std::string("-"), std::string("/"),
-                                 std::string("*"), std::string("<<"), std::string(">>"),
-                                 std::string("^"), std::string("=="), std::string("|"), std::string("&"));
-  RunOnCodeFixture fixture;
-
-  const std::string code = "int main() { int a; (void)(a " + binary_operand + " 4); }";
-  const auto& operations = fixture(code);
-
-  REQUIRE(operations.size() == 1);
-
-  const OperationLog& log = operations.front();
-
-  REQUIRE(log.entry_type == OperationLog::BasicOperation::TYPE_NAME);
-
-  const OperationLog::BasicOperation* op = (OperationLog::BasicOperation*)(log.entry.get());
-
-  REQUIRE(op->operation_name == binary_operand);
-  REQUIRE(op->type_lhs == "int");
-  REQUIRE(op->type_rhs == "int");
-  REQUIRE(op->type_result == "int");
-}
-
-TEST_CASE("Find unary operations", "[basic_operation]")
-{
-  auto unary_operand = GENERATE(std::string("++"), std::string("--"), std::string("~"), std::string("!"));
-  RunOnCodeFixture fixture;
-
-  const std::string code = "int main() { int a; (void)(" + unary_operand + "a); }";
-  const auto& operations = fixture(code);
-
-  REQUIRE(operations.size() == 1);
-
-  const OperationLog& log = operations.front();
-
-  REQUIRE(log.entry_type == OperationLog::BasicOperation::TYPE_NAME);
-
-  const OperationLog::BasicOperation* op = (OperationLog::BasicOperation*)(log.entry.get());
-
-  REQUIRE(op->operation_name == unary_operand);
-  REQUIRE(op->type_lhs == "int");
-  REQUIRE(op->type_rhs.empty());
-  REQUIRE(op->type_result == "int");
-}
-
-TEST_CASE("Find subscript operation", "[basic_operation]")
-{
-  RunOnCodeFixture fixture;
-
-  const std::string code = "int main() { int a[4]; (void)a[4]; }";
-  const auto& operations = fixture(code);
-
-  REQUIRE(operations.size() == 1);
-
-  const OperationLog& log = operations.front();
-
-  REQUIRE(log.entry_type == OperationLog::BasicOperation::TYPE_NAME);
-
-  const OperationLog::BasicOperation* op = (OperationLog::BasicOperation*)(log.entry.get());
-
-  REQUIRE(op->operation_name == "subscript");
-  REQUIRE(op->type_lhs == "int *");
-  REQUIRE(op->type_rhs == "int");
-  REQUIRE(op->type_result == "int");
-}
-
-TEST_CASE("Find subscript operation reversed", "[basic_operation]")
-{
-  RunOnCodeFixture fixture;
-
-  const std::string code = "int main() { int a[4]; (void)4[a]; }";
-  const auto& operations = fixture(code);
-
-  REQUIRE(operations.size() == 1);
-
-  const OperationLog& log = operations.front();
-
-  REQUIRE(log.entry_type == OperationLog::BasicOperation::TYPE_NAME);
-
-  const OperationLog::BasicOperation* op = (OperationLog::BasicOperation*)(log.entry.get());
-
-  REQUIRE(op->operation_name == "subscript");
-  REQUIRE(op->type_lhs == "int *");
-  REQUIRE(op->type_rhs == "int");
-  REQUIRE(op->type_result == "int");
-}

op-finder-tests/branches.cpp

@@ -1,125 +0,0 @@
-//
-// Created by erki on 07.03.21.
-//
-
-#include <catch2/catch.hpp>
-
-#include "fixtures/RunOnCodeFixture.hpp"
-
-TEST_CASE("For loop without header", "[branches][for_loops]")
-{
-  RunOnCodeFixture fixture;
-
-  const std::string code = "int main() { int a; for (;;) {} }";
-  REQUIRE(fixture.runCode(code));
-
-  REQUIRE(fixture.storage.getOperations().empty());
-}
-
-TEST_CASE("For loop with init only.", "[branches][for_loops]")
-{
-  RunOnCodeFixture fixture;
-
-  const std::string code = "int main() { int a; for (a = 4;;) {} }";
-  const auto& operations = fixture(code);
-
-  REQUIRE(operations.size() == 1);
-
-  const OperationLog& log = operations.front();
-
-  REQUIRE(log.branch_number == 1);
-}
-
-
-TEST_CASE("For loop with init & cond.", "[branches][for_loops]")
-{
-  RunOnCodeFixture fixture;
-
-  const std::string code = "int main() { int a; for (a = 4; a < 4;) {} }";
-  const auto& operations = fixture(code);
-
-  REQUIRE(operations.size() == 2);
-
-  const OperationLog& log_init = operations.at(0);
-  REQUIRE(log_init.branch_number == 1);
-
-  const OperationLog& log_cond = operations.at(1);
-  REQUIRE(log_cond.branch_number == 2);
-}
-
-TEST_CASE("For loop with init & inc.", "[branches][for_loops]")
-{
-  RunOnCodeFixture fixture;
-
-  const std::string code = "int main() { int a; for (a = 4;;a++) {} }";
-  const auto& operations = fixture(code);
-
-  REQUIRE(operations.size() == 2);
-
-  const OperationLog& log_init = operations.at(0);
-  REQUIRE(log_init.branch_number == 1);
-
-  const OperationLog& log_inc = operations.at(1);
-  REQUIRE(log_inc.branch_number == 2);
-}
-
-TEST_CASE("For loop with full header.", "[branches][for_loops]")
-{
-  RunOnCodeFixture fixture;
-
-  const std::string code = "int main() { int a; for (a = 4; a < 4 ;a++) {} }";
-  const auto& operations = fixture(code);
-
-  REQUIRE(operations.size() == 3);
-
-  const OperationLog& log_init = operations.at(0);
-  REQUIRE(log_init.branch_number == 1);
-
-  const OperationLog& log_cond = operations.at(1);
-  REQUIRE(log_cond.branch_number == 2);
-
-  const OperationLog& log_inc = operations.at(2);
-  REQUIRE(log_inc.branch_number == 2);
-}
-
-TEST_CASE("For loop without init.", "[branches][for_loops]")
-{
-  RunOnCodeFixture fixture;
-
-  const std::string code = "int main() { int a; for (;a < 4 ;a++) {} }";
-  const auto& operations = fixture(code);
-
-  REQUIRE(operations.size() == 2);
-
-  const OperationLog& log_cond = operations.at(0);
-  REQUIRE(log_cond.branch_number == 0);
-
-  const OperationLog& log_inc = operations.at(1);
-  REQUIRE(log_inc.branch_number == 0);
-}
-
-TEST_CASE("For loop closes branches inside the loop.", "[branches][for_loops]")
-{
-  RunOnCodeFixture fixture;
-
-  const std::string code = "int main() { int a; for (a = 4; a < 4 ; a++) { a = 5; } }";
-  const auto& operations = fixture(code);
-
-  REQUIRE(operations.size() == 4);
-
-  const OperationLog& log_inner = operations.back();
-  REQUIRE(log_inner.branch_number == 0);
-}
-
-TEST_CASE("For loop closes branches outside the loop.", "[branches][for_loops]")
-{
-  RunOnCodeFixture fixture;
-
-  const std::string code = "int main() { int a; for (a = 4; a < 4 ; a++) {} a = 5; }";
-  const auto& operations = fixture(code);
-
-  REQUIRE(operations.size() == 4);
-
-  const OperationLog& log_outer = operations.back();
-  REQUIRE(log_outer.branch_number == 0);
-}

op-finder-tests/fixtures/RunOnCodeFixture.cpp

@@ -1,37 +0,0 @@
-//
-// Created by erki on 07.03.21.
-//
-
-#include "RunOnCodeFixture.hpp"
-
-#include <catch2/catch.hpp>
-
-#include <clang/Tooling/Tooling.h>
-#include <clang/Frontend/FrontendActions.h>
-
-RunOnCodeFixture::RunOnCodeFixture()
-  : finder(&storage)
-  , action(&finder)
-{ }
-
-bool RunOnCodeFixture::runCode(const std::string& code)
-{
-  return clang::tooling::runToolOnCode(
-          clang::tooling::newFrontendActionFactory(&action)->create(),
-          code,
-          RunOnCodeFixture::INPUT_FILE
-  );
-}
-
-const std::vector<OperationLog>& RunOnCodeFixture::operator()(const std::string& code)
-{
-  const bool success = runCode(code);
-
-  REQUIRE(success);
-
-  const auto& operations = storage.getOperations();
-
-  REQUIRE(operations.count(RunOnCodeFixture::INPUT_FILE) == 1);
-
-  return operations.at(RunOnCodeFixture::INPUT_FILE);
-}

op-finder-tests/fixtures/RunOnCodeFixture.hpp

@@ -1,27 +0,0 @@
-//
-// Created by erki on 07.03.21.
-//
-
-#ifndef C_ANALYZER_RUNONCODEFIXTURE_HPP
-#define C_ANALYZER_RUNONCODEFIXTURE_HPP
-
-#include <OperationStorage.hpp>
-#include <OperationFinder.hpp>
-#include <OperationFinderAstAction.hpp>
-
-struct RunOnCodeFixture
-{
-  constexpr static char INPUT_FILE[] = "input.c";
-
-  OperationStorage storage;
-  OperationFinder finder;
-  OperationFinderAstAction action;
-
-  RunOnCodeFixture();
-
-  bool runCode(const std::string& code);
-
-  const std::vector<OperationLog>& operator()(const std::string& code);
-};
-
-#endif //C_ANALYZER_RUNONCODEFIXTURE_HPP

op-finder-tests/main.cpp

@@ -1,6 +0,0 @@
-//
-// Created by erki on 07.03.21.
-//
-
-#define CATCH_CONFIG_MAIN  // This tells Catch to provide a main() - only do this in one cpp file
-#include <catch2/catch.hpp>

op-finder/ASTHelpers.hpp

@@ -1,4 +1,4 @@
-//src
+//
 // Created by erki on 02.03.21.
 //
 

op-finder/CMakeLists.txt

@@ -1,5 +1,8 @@
 cmake_minimum_required(VERSION 3.17)
 
+find_package(Clang REQUIRED)
+find_package(LLVM REQUIRED COMPONENTS Support Option Core)
+
 # LLVM is typically compiled without RTTI. Weird linker errors ensue if
 # you keep RTTI on and try to link.
 if (NOT LLVM_ENABLE_RTTI)
@@ -12,9 +15,33 @@ if (NOT LLVM_ENABLE_RTTI)
     endif ()
 endif ()
 
+llvm_map_components_to_libnames(llvm_libs support option core)
+
 add_executable(op-finder
-    main.cpp)
+    main.cpp
+    OperationFinder.cpp
+    OperationStorage.cpp
+    OperationAstMatcher.cpp
+    OperationFinderAstVisitor.cpp
+    OperationFinderAstConsumer.cpp
+    OperationFinderAstAction.cpp
+    OperationLog.cpp)
+
+target_include_directories(op-finder
+    PRIVATE
+        ${LLVM_INCLUDE_DIRS}
+        ${PROJECT_SOURCE_DIR}/dependencies
+)
+
+target_compile_definitions(op-finder
+    PRIVATE
+        ${LLVM_DEFINITIONS}
+)
 
 target_link_libraries(op-finder
-    PUBLIC
-        op-finder-lib)
+    PRIVATE
+        ${llvm_libs}
+        clangTooling
+        clangBasic
+        clangASTMatchers
+)

op-finder/OperationStorage.cpp

@@ -9,32 +9,20 @@
 
 #include <llvm/Support/CommandLine.h>
 
-OperationStorage::~OperationStorage()
+OperationStorage::OperationStorage(const std::string& output_filename)
+  : _output_filename(output_filename)
 { }
 
+OperationStorage::~OperationStorage()
+{
+  _dumpToFile();
+}
+
 void OperationStorage::enablePrettyPrint()
 {
   _pretty_print = true;
 }
 
-void OperationStorage::toStream(std::ostream& stream)
-{
-  nlohmann::json json = _operations;
-
-  if (_pretty_print)
-    stream << std::setw(4) << json;
-  else
-    stream << json;
-}
-
-void OperationStorage::toFile(const std::string& output_filename)
-{
-  std::ofstream file(output_filename);
-
-  toStream(file);
-}
-
-
 void OperationStorage::pushOperation(const std::string& filename, OperationLog&& op)
 {
   auto it = _operations.find(filename);
@@ -49,3 +37,15 @@ const std::unordered_map<std::string, std::vector<OperationLog>>& OperationStora
 {
   return _operations;
 }
+
+void OperationStorage::_dumpToFile()
+{
+  nlohmann::json json = _operations;
+
+  std::ofstream file(_output_filename);
+
+  if (_pretty_print)
+    file << std::setw(4) << json;
+  else
+    file << json;
+}

op-finder/OperationStorage.hpp

@@ -14,21 +14,22 @@
 class OperationStorage : public IOperationOutput
 {
 public:
-  OperationStorage() = default;
+  OperationStorage() = delete;
   OperationStorage(const OperationStorage&) = delete;
 
+  explicit OperationStorage(const std::string& output_filename);
   ~OperationStorage() override;
 
   void enablePrettyPrint();
-  void toStream(std::ostream& stream);
-  void toFile(const std::string& output_filename);
-
   void pushOperation(const std::string& filename, OperationLog&& op) override;
   [[nodiscard]] const std::unordered_map<std::string, std::vector<OperationLog>>& getOperations() const;
 private:
   std::unordered_map<std::string, std::vector<OperationLog>> _operations;
+  std::string _output_filename;
 
   bool _pretty_print = false;
+
+  void _dumpToFile();
 };
 
 #endif //C_ANALYZER_OPERATIONSTORAGE_HPP

op-finder/main.cpp

@@ -5,8 +5,6 @@
 // Declares llvm::cl::extrahelp.
 #include "llvm/Support/CommandLine.h"
 
-#include <iostream>
-
 #include "OperationAstMatcher.hpp"
 #include "OperationFinder.hpp"
 #include "OperationStorage.hpp"
@@ -52,7 +50,7 @@ int main(int argc, const char** argv)
   ClangTool Tool(OptionsParser.getCompilations(),
                  OptionsParser.getSourcePathList());
 
-  OperationStorage storage;
+  OperationStorage storage(OutputFile.getValue());
 
   if (PrettyPrint.getValue())
     storage.enablePrettyPrint();
@@ -72,10 +70,5 @@ int main(int argc, const char** argv)
 
   OperationFinderAstAction action(&op_finder);
 
-  assert(!Tool.run(newFrontendActionFactory(&action).get()));
-
-  if (!OutputFile.getValue().empty())
-    storage.toFile(OutputFile.getValue());
-  else
-    storage.toStream(std::cout);
+  return Tool.run(newFrontendActionFactory(&action).get());
 }