我正在努力解决一个神秘的问题 我只看到我的RHEL4发布版本。我的一些单元测试(使用boost 1.36单元测试框架)在RHEL4(gcc 3.4.6)和使用发布构建类型上失败。我没有看到使用RHEL5发布或调试构建类型的问题(gcc 4.1.2,boost-1.39);我也不 使用Visual Studio 2005(使用boost-1.36)或2008(使用boost-1.39)在Windows 32位或64位上查看。
怀疑这可能是由于一些微妙的内存问题,我继续在测试应用程序上运行valgrind(保留问题的最小情况)。这是我使用“完全,无法访问”模式运行valgrind时得到的结果:
==12285== Memcheck, a memory error detector.
==12285== Copyright (C) 2002-2005, and GNU GPL'd, by Julian Seward et al.
==12285== Using LibVEX rev 1575, a library for dynamic binary translation.
==12285== Copyright (C) 2004-2005, and GNU GPL'd, by OpenWorks LLP.
==12285== Using valgrind-3.1.1, a dynamic binary instrumentation framework.
==12285== Copyright (C) 2000-2005, and GNU GPL'd, by Julian Seward et al.
==12285== For more details, rerun with: -v
==12285==
==12285== My PID = 12285, parent PID = 12284. Prog and args are:
==12285== ./myprojd
==12285==
==12285== Syscall param sigaltstack(ss) points to uninitialised byte(s)
==12285== at 0x3AD682EDA9: sigaltstack (in /lib64/tls/libc-2.3.4.so)
==12285== by 0x6488638: boost::detail::signal_handler::~signal_handler()
(in /<path_to>/libboost_unit_test_framework-gcc34-mt-1_36.so.1.36.0)
==12285== by 0x648975E: boost::execution_monitor::catch_signals
(boost::unit_test::callback0<int> const&)
(in /<path_to>/libboost_unit_test_framework-gcc34-mt-1_36.so.1.36.0)
==12285== by 0x6489813: boost::execution_monitor::execute
(boost::unit_test::callback0<int> const&)
(in /<path_to>/libboost_unit_test_framework-gcc34-mt-1_36.so.1.36.0)
==12285== by 0x648F2E4: boost::unit_test::framework::run(unsigned long, bool)
(in /<path_to>/libboost_unit_test_framework-gcc34-mt-1_36.so.1.36.0)
==12285== by 0x649BD02: boost::unit_test::unit_test_main(bool (*)(), int, char**)
(in /<path_to>/libboost_unit_test_framework-gcc34-mt-1_36.so.1.36.0)
==12285== by 0x4147F0: main (init.cpp:132)
==12285== Address 0x7FEFFF3B0 is on thread 1's stack
==12285==
==12285== ERROR SUMMARY: 6 errors from 1 contexts (suppressed: 4 from 1)
==12285== malloc/free: in use at exit: 190,112 bytes in 1,869 blocks.
==12285== malloc/free: 23,128 allocs, 21,259 frees, 2,520,845 bytes allocated.
==12285== For counts of detected errors, rerun with: -v
==12285== searching for pointers to 1,869 not-freed blocks.
==12285== checked 2,184,272 bytes.
==12285==
==12285== LEAK SUMMARY:
==12285== definitely lost: 0 bytes in 0 blocks.
==12285== possibly lost: 0 bytes in 0 blocks.
==12285== still reachable: 190,112 bytes in 1,869 blocks.
==12285== suppressed: 0 bytes in 0 blocks.
==12285== Reachable blocks (those to which a pointer was found) are not shown.
==12285== To see them, rerun with: --show-reachable=yes
当然,我在调试模式下运行它(虽然我提到错误仅在发布模式下发生)。如果我在发布模式下运行valgrind,我得到相同的输出(也许 较少的细节,如线#s)。从这看起来问题出现在boost-1.36中,或者也许是我对init_unit_test_suite的定义?显然,我可以尝试的一件事是 在所有平台上使用boost-1.39运行;但不幸的是,我们目前正在使用RHEL4和VS2005的boost-1.36,所以这可能还不实用。
我还观察到在测试失败的时候强制某个记录器输出到控制台,使测试通过(不好,我知道)!怀疑这可能是因为我评论了所有记录器输出并运行了valgrind - 所以这就是上面发布的内容。如果您需要init_unit_test_suite函数的一些代码片段;我可以发布,如果有帮助的话。任何解决这个问题的想法都是受欢迎的,非常感谢。
05/26/2011编辑:
这是init_unit_test_suite - 感谢有人可以看看。
std::ofstream log_stream;
std::ofstream report_stream;
const_string retrieve_framework_parameter( const_string cla_name, int argc, char** argv ) {
//- first try to find parameter among command line arguments if present
if( argc ) {
//- locate corresponding cla name
if( !cla_name.is_empty() ) {
for( int i = 1; i < argc; ++i ) {
if( cla_name == const_string( argv[i], cla_name.size() ) && argv[i][cla_name.size()] == '=' ) {
const_string result = argv[i] + cla_name.size() + 1;
for( int j = i; j < argc; ++j ) {
argv[j] = argv[j+1];
}
--argc;
return result;
}
}
}
}
return std::getenv( cla_name.begin() );
}
//! Format results to CPP UNIT xml
class simple_report_formatter : public results_reporter::format {
public:
virtual void results_report_start( std::ostream&) {
}
virtual void results_report_finish( std::ostream&) {
}
virtual void test_unit_report_start(test_unit const&, std::ostream&) {
}
virtual void test_unit_report_finish(test_unit const& tu, std::ostream& out) {
if( tu.p_type == tut_case ) {
const test_results& r = results_collector.results(tu.p_id);
if( r.passed() ) {
out<<"[PASS] ";
} else {
out<<"[FAIL] ";
}
out<<"Test Case <unit_"<<tu.p_name.get()<<"> ";
if( !r.passed() ) {
out<<" - ";
out<<"!! Assertions failed: "<<r.p_assertions_failed;
out<<" - See log files for details on failures !!";
}
out<<std::endl;
#if defined(MYPROJ_WINDOWS) && defined(MYPROJ_DEBUG)
if( !r.passed() ) {
std::ostringstream msg;
msg<<"!! "<<tu.p_name.get()<<" FAILED !!"<<std::endl;
OutputDebugStringA(msg.str().c_str());
}
#endif
}
}
virtual void do_confirmation_report(test_unit const&, std::ostream&) {
}
};
bool init_unit_test_suite() {
const_string log_file = retrieve_framework_parameter(
"--log_file",
framework::master_test_suite().argc,
framework::master_test_suite().argv
);
if( !log_file.empty() ) {
log_stream.open(log_file.begin());
unit_test_log.set_stream(log_stream);
}
const_string report_file = retrieve_framework_parameter(
"--report_file",
framework::master_test_suite().argc,
framework::master_test_suite().argv
);
if( !report_file.empty() ) {
report_stream.open(report_file.begin());
results_reporter::set_stream(report_stream);
}
if( runtime_config::report_format() == CLF ) {
results_reporter::set_format(new simple_report_formatter);
}
// This is providing the sensible default configuration when the test is being run
// without any input parameters whatsoever: print the final report to console
if( framework::master_test_suite().argc <= 1 ) {
results_reporter::set_stream(std::cout);
results_reporter::set_format(new simple_report_formatter);
results_reporter::set_level(DETAILED_REPORT);
}
framework::master_test_suite().p_name.set(MYPROJ_TEST_SUITE_NAME);
return true;
}
答案 0 :(得分:1)
valgrind中的这个“错误”不一定是个问题。在Linux中调用系统调用时,通常必须将内存从用户空间复制到内核空间。这样做可以复制未初始化的字节。
仅仅因为它将这些字节复制到内核空间并不意味着内核实际上会对未初始化的字节做任何事情。内核对字节的作用在很大程度上取决于所讨论的系统调用的语义。
Valgrind没有简单的方法可以知道系统调用中传递的某些字节是否正常,因此它始终表示错误。 valgrind会抑制许多类似的错误。
您可以在此文件中看到valgrind的一些默认抑制: /usr/lib/valgrind/default.supp 如果您愿意,也可以创建自己的抑制文件并在单元测试中使用它们抑制错误消息。如果您没有在此系统上遇到任何实际问题,那么他们抑制错误可能是一个好主意。请参阅valgrind的命令行选项。