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uti: Clear user space PTEs after first fork in create_tracer()

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Change-Id: I60755f0cb5e84c3a5a5cd91515411a30f0995822
This commit is contained in:
Masamichi Takagi
2018-09-04 09:57:02 +09:00
parent 5c8c1986b5
commit 63703589e5
6 changed files with 92 additions and 26 deletions
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23
executer/kernel/mcctrl/control.c
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@@ -2517,14 +2517,19 @@ err:
return 0;
}
long mcexec_unmap_pseudo_filemap(ihk_os_t os, struct file *file)
static long mcexec_release_user_space(struct release_user_space_desc *__user arg)
{
long rc = -1;
struct mcos_handler_info *info;
info = ihk_os_get_mcos_private_data(file);
dprintk("%s: clear_pte_range %p-%p\n", __FUNCTION__, (void*)info->user_start, (void*)info->user_end);
rc = clear_pte_range(info->user_start, info->user_end - info->user_start);
return rc;
struct release_user_space_desc desc;
if (copy_from_user(&desc, arg, sizeof(desc))) {
return -EFAULT;
}
#if 1
return clear_pte_range(desc.user_start, desc.user_end - desc.user_start);
#else
return release_user_space(desc.user_start, desc.user_end - desc.user_start);
#endif
}
static long (*mckernel_do_futex)(int n, unsigned long arg0, unsigned long arg1,
@@ -3017,8 +3022,8 @@ long __mcctrl_control(ihk_os_t os, unsigned int req, unsigned long arg,
case MCEXEC_UP_TERMINATE_THREAD:
return mcexec_terminate_thread(os, (unsigned long *)arg, file);
case MCEXEC_UP_UNMAP_PSEUDO_FILEMAP:
return mcexec_unmap_pseudo_filemap(os, file);
case MCEXEC_UP_RELEASE_USER_SPACE:
return mcexec_release_user_space((struct release_user_space_desc *)arg);
case MCEXEC_UP_GET_NUM_POOL_THREADS:
return mcctrl_get_num_pool_threads(os);