std :: thread.join（）在Mac OS下的Valgrind下的SIGSEGV [英] std::thread.join() SIGSEGV on Mac OS under Valgrind

问题描述

以下简单代码（C ++ 11）将在Mac OS和Linux上运行：

  #include< thread> ; 
 #include< chrono> 
 #include< iostream> 
 
 void threadFunction（）{
 for（int cc = 0; cc< 10000000; ++ cc）{
 if（cc％1000000 == 0）{
 std :: this_thread :: sleep_for（std :: chrono :: milliseconds（200））; 
} 
} 
} 
 
 
 int main（int argc，char ** argv）{
 std :: thread threads [10 ]; 
 for（int tt = 0; tt< 10; ++ tt）{
 threads [tt] = std :: thread（threadFunction）; 
} 
 //等待线程完成
 for（int tt = 0; tt< 10; ++ tt）{
 printf \\\
，tt）; 
 std :: cout.flush（）; 
 threads [tt] .join（）; 
 printf（Joined％d\\\
，tt）; 
 std :: cout.flush（）; 
} 
 return 0; 
} 
  

但是，在Valgrind中执行：

  valgrind --leak-check = full --show-reachable = no --track-fds = yes --error-exitcode = 1 --track-origins = yes ./theexecutable 
  

...现在它可以在Linux上运行，但在Mac OSX上不能运行，失败with：

  == 47544 ==以信号11（SIGSEGV）的默认动作结束的进程
 == 47544 = =访问不在映射区域内的地址0x700008F31C3E 
 == 47544 ==在0x10052E37F：_pthread_find_thread（在/usr/lib/system/libsystem_pthread.dylib）
 == 47544 == by 0x100530D52：_pthread_join_cleanup /usr/lib/system/libsystem_pthread.dylib）
 == 47544 == by 0x100530C63：pthread_join（在/usr/lib/system/libsystem_pthread.dylib）
 == 47544 == by 0x100057E94：std :: __ 1 :: thread :: join（）（在/usr/lib/libc++.1.dylib）
 == 47544 == by 0x100001BB1：main（in ./vgtest）
  
 
 
 
任何想法为什么这是失败的（然后只在OSX上）？
 
 
 
 Valgrind-3.11.0，OSX 10.11.3 
解决方案
这是Valgrind的一个错误。主错误报告可在此处找到： https://bugs.kde.org/show_bug.cgi ？id = 349128  
 
The following simple code (C++ 11) will run just find on Mac OS and Linux:
#include <thread>
#include <chrono>
#include <iostream>

void threadFunction() {
    for (int cc=0; cc < 10000000; ++cc) {
        if (cc%1000000 == 0) {
            std::this_thread::sleep_for(std::chrono::milliseconds(200));
        }
    }
}


int main(int argc, char **argv) {
    std::thread threads[10];
    for (int tt = 0; tt < 10; ++tt) {
        threads[tt] = std::thread(threadFunction);
    }
    // Wait for the threads to complete
    for (int tt = 0; tt < 10; ++tt) {
        printf("About to join %d\n", tt);
        std::cout.flush();
        threads[tt].join();
        printf("Joined %d\n", tt);
        std::cout.flush();
    }
    return 0;
}
However, wrap execution in Valgrind:
valgrind --leak-check=full --show-reachable=no --track-fds=yes --error-exitcode=1 --track-origins=yes ./theexecutable
...and it now works on Linux, but not on Mac OSX, failing with:
==47544== Process terminating with default action of signal 11 (SIGSEGV)
==47544==  Access not within mapped region at address 0x700008F31C3E
==47544==    at 0x10052E37F: _pthread_find_thread (in /usr/lib/system/libsystem_pthread.dylib)
==47544==    by 0x100530D52: _pthread_join_cleanup (in /usr/lib/system/libsystem_pthread.dylib)
==47544==    by 0x100530C63: pthread_join (in /usr/lib/system/libsystem_pthread.dylib)
==47544==    by 0x100057E94: std::__1::thread::join() (in /usr/lib/libc++.1.dylib)
==47544==    by 0x100001BB1: main (in ./vgtest)
Any ideas why this is failing (and then only on OSX)?

Valgrind-3.11.0, OSX 10.11.3
解决方案
This is a bug in Valgrind. Master bug report can be found here: https://bugs.kde.org/show_bug.cgi?id=349128

                        
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