Question

我尝试了here

给出的程序

small_race.c

$ clang -fsanitize=thread -g -pthread -O1 small_race.c
$./a.out  ==> No error it's passing successfully

汇编

ref.child('contabilidad').once('value', function(snapshot) {
  var updates = {};
  snapshot.forEach(function(child) {
    updates[child.key()+'/pago'] = 0;
  });
  ref.child('contabilidad').update(updates);
});

我试图创建另外两个线程，并尝试在其中一个线程中睡觉，然后它也正在传递。我正在使用Debian OS

Answer 1

您的平台或安装有问题。根据您的确切代码，我得到：

==================
WARNING: ThreadSanitizer: data race (pid=20087)
  Write of size 4 at 0x000000601080 by thread T1:
    #0 Thread1(void*) /tmp/a.cpp:4 (a2+0x000000400a7f)
    #1 <null> <null> (libtsan.so.0+0x0000000235b9)

  Previous write of size 4 at 0x000000601080 by main thread:
    #0 main /tmp/a.cpp:10 (a2+0x000000400ac5)

  Location is global '<null>' of size 0 at 0x000000000000 (a2+0x000000601080)

  Thread T1 (tid=20089, running) created by main thread at:
    #0 pthread_create <null> (libtsan.so.0+0x000000027a67)
    #1 main /tmp/a.cpp:9 (a2+0x000000400abb)

SUMMARY: ThreadSanitizer: data race /tmp/a.cpp:4 Thread1(void*)
==================

线程清理程序没有显示数据竞争

1 个答案: