在检查指针是否为 0 时，我遇到了这个烦人的段错误。这是有问题的代码:
bool egammaMVACalib::checkTree()
{
// Not a TChain
cout << "a" << endl;
assert(m_tree); // crash on line 751 (this one)
cout << "B" << endl;
m_tree 是 egammaMVACalib 类型的数据成员 TTree* 所以我真的不明白为什么 assert(m_tree ) 会引发分段冲突。这是带有堆栈跟踪的输出
a
19:07:25 30574 Wrk-0.9 | *** Break ***: segmentation violation
===========================================================
There was a crash.
This is the entire stack trace of all threads:
===========================================================
#0 0x000000361869a4d5 in waitpid () from /lib64/libc.so.6
#1 0x000000361863c481 in do_system () from /lib64/libc.so.6
#2 0x00002ac5099cb322 in TUnixSystem::StackTrace() ()
from /usr/local/proof/root/lib/libCore.so
#3 0x00002ac5099c7fea in TUnixSystem::DispatchSignals(ESignals) ()
from /usr/local/proof/root/lib/libCore.so
#4 <signal handler called>
#5 egammaMVACalib::checkTree (this=0x0) at ../Root/egammaMVACalib.cxx:751
#6 0x00002ac5117e5563 in egammaMVACalib::LoadVariables (this=0x1, index=0)
at ../Root/egammaMVACalib.cxx:492
最佳答案
如果您查看第 5 帧，您的 this 指针为空。这意味着问题从那里开始。断言处的段错误仅仅是对它的重复!
关于c++ - assert(pointer) 引发分段违规，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/10555872/