hboehm垃圾收集器未初始化值错误和泄漏

我在试验 hboehm garbage collector ,现在只是试着 simple example . 问题是,当我用Valgrind检查结果时,会出现很多“使用未初始化值”错误,讽刺的是,还会出现内存泄漏。

完整项目的一个最小的例子,再现问题。

cmake_minimum_required(VERSION 3.10)

# This "outer" CMake file works as a dependency fetcher, and it consists almost exclusively of ExternalProject commands.
# The "inner" CMake file under project/ is a more traditional CMake file. It uses the find_* commands to locate
# dependencies without any knowledge or assumptions about where those dependencies live or how they got there.

include(ExternalProject)

ExternalProject_Add(
    libatomic_ops
    URL http://www.hboehm.info/gc/gc_source/libatomic_ops-7.6.2.tar.gz
    CONFIGURE_COMMAND "" BUILD_COMMAND "" INSTALL_COMMAND ""
)
ExternalProject_Get_Property(libatomic_ops SOURCE_DIR)
set(libatomic_ops_SOURCE_DIR "${SOURCE_DIR}")

ExternalProject_Add(
    hboehm_gc
    URL http://www.hboehm.info/gc/gc_source/gc-7.6.4.tar.gz
    DEPENDS libatomic_ops
    BUILD_IN_SOURCE TRUE
    # hboehm_gc requires libatomic_ops be placed in a libatomic_ops subdirectory
    PATCH_COMMAND "${CMAKE_COMMAND}" -E copy_directory "${libatomic_ops_SOURCE_DIR}" "<SOURCE_DIR>/libatomic_ops"
    CONFIGURE_COMMAND ./configure "--prefix=<INSTALL_DIR>"
    BUILD_COMMAND make
    INSTALL_COMMAND make install
)
ExternalProject_Get_Property(hboehm_gc INSTALL_DIR)
set(hboehm_gc_INSTALL_DIR "${INSTALL_DIR}")

# Now that we have our dependencies on disk to be found, it's safe to configure (run cmake on) the real project
ExternalProject_Add(
    main DEPENDS hboehm_gc
    DOWNLOAD_COMMAND ""
    SOURCE_DIR "${CMAKE_CURRENT_SOURCE_DIR}/project"
    BUILD_ALWAYS TRUE
    CMAKE_ARGS "-DCMAKE_PREFIX_PATH=${hboehm_gc_INSTALL_DIR}"
    INSTALL_COMMAND ""
    TEST_COMMAND "${CMAKE_CTEST_COMMAND}" --verbose
)

cmake_minimum_required(VERSION 3.10)

find_path(HBOEHM_GC_INSTALL_DIR include/gc.h)
find_program(VALGRIND_COMMAND valgrind)

add_executable(main src/main.cpp)
target_compile_features(main PRIVATE cxx_std_14)
target_link_libraries(main PRIVATE "${HBOEHM_GC_INSTALL_DIR}/lib/libgc.a" pthread)
target_include_directories(main PRIVATE "${HBOEHM_GC_INSTALL_DIR}/include")

enable_testing()
add_test(NAME valgrind COMMAND "${VALGRIND_COMMAND}" "$<TARGET_FILE:main>")
set_tests_properties(
    valgrind PROPERTIES
    PASS_REGULAR_EXPRESSION "ERROR SUMMARY: 0 errors from 0 contexts"
)

#include <cassert>
#include <iostream>
#include <gc.h>

int main() {
  int i;

  GC_INIT();    /* Optional on Linux/X86; see below.  */
  for (i = 0; i < 10000000; ++i)
   {
     int **p = (int **) GC_MALLOC(sizeof(int *));
     int *q = (int *) GC_MALLOC_ATOMIC(sizeof(int));
     assert(*p == 0);
     *p = (int *) GC_REALLOC(q, 2 * sizeof(int));
     if (i % 100000 == 0)
       std::cout << "Heap size = " << GC_get_heap_size() << "\n";
   }
  return 0;
}

只需要:

mkdir build
cd build
cmake ..
make

它将下载hboehm\u gc和依赖项,构建项目,并运行valgrind。我希望我只是在某种程度上误用了图书馆,但我不确定我做错了什么。感谢您的帮助。