换了个公司，跟原来公司做的业务相似又不一致，从交易系统转移到了回测平台，稍微总结一下。
对未来的自己：
The customized abnormal signal handler (e.g. SIGSEGV handler) will function abnormally if we call exit() inside the handler: the program will exit “as normal” however it did had some severe memory issue.
See code snippet below, try to run with / without “X” argument.
/* exit example */
#include <stdio.h> /* printf, fopen */
#include <stdlib.h> /* exit, EXIT_FAILURE */
#include <signal.h> /* signal */
#include <string.h>
bool disable_exit = false;
void InitiateAbnormalShutdown()
{
printf("ABNORMAL SHUTDOWN!!!\n");
if (!disable_exit)
exit(EXIT_FAILURE);
}
void AbnormalSignalHandler(int signo)
{
signal(signo, SIG_DFL);
InitiateAbnormalShutdown();
raise(signo);
}
bool give_me_an_error()
{
int* test = new int;
*test = 500;
delete test;
test = NULL;
*test = 900;
if (*test > 500)
{
return false;
}
return true;
}
int main(int argc, char *argv[])
{
if (argc > 1)
{
printf("arg == %s\n", argv[1]);
if (strcmp(argv[1], "X") == 0)
{
printf("disable exit on abnormal handler...\n");
disable_exit = true;
}
}
signal(SIGSEGV, AbnormalSignalHandler);
give_me_an_error();
return 0;
}
Output:
bowei.he:/sandbox/bowei.he/temp$ ./sigf ABNORMAL SHUTDOWN!!! bowei.he:/sandbox/bowei.he/temp$ ./sigf X arg == X disable exit on abnormal handler... ABNORMAL SHUTDOWN!!! Segmentation fault (core dumped)