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do_fork(): RLIMIT_NPROC check

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1. mcexec sets RLIMIT_NPROC to the number of mcexec threads.
2. do_fork() gets the current number of threads by calling rusage function.
3. do_fork() returns -EAGAIN when the limit is exceeded.
This commit is contained in:
Masamichi Takagi
2017-07-12 20:33:49 +09:00
parent 7d38c7c147
commit 035e7913d8
3 changed files with 28 additions and 0 deletions
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12
kernel/include/rusage.h
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@ -147,6 +147,12 @@ rusage_num_threads_dec()
{
__sync_sub_and_fetch(&monitor->rusage_num_threads, 1);
}
static inline unsigned long
rusage_num_threads_get()
{
return monitor->rusage_num_threads;
}
#else
static inline void
rusage_total_memory_add(unsigned long size)
@ -192,6 +198,12 @@ static inline void
rusage_num_threads_dec()
{
}
static inline unsigned long
rusage_num_threads_get()
{
return -1;
}
#endif // ENABLE_RUSAGE
#endif