b1da7fafd0
. also make other out-of-memory conditions less fatal . add a test case for a user program using all the memory it can . remove some diagnostic prints for situations that are normal when running out of memory so running the test isn't noisy
135 lines
2.7 KiB
C
135 lines
2.7 KiB
C
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#define _SYSTEM 1
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#include <minix/callnr.h>
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#include <minix/com.h>
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#include <minix/config.h>
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#include <minix/const.h>
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#include <minix/ds.h>
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#include <minix/endpoint.h>
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#include <minix/keymap.h>
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#include <minix/minlib.h>
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#include <minix/type.h>
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#include <minix/ipc.h>
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#include <minix/sysutil.h>
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#include <minix/syslib.h>
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#include <minix/bitmap.h>
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#include <errno.h>
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#include <assert.h>
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#include <env.h>
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#include "glo.h"
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#include "proto.h"
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#include "util.h"
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#include "sanitycheck.h"
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void free_proc(struct vmproc *vmp)
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{
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map_free_proc(vmp);
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pt_free(&vmp->vm_pt);
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region_init(&vmp->vm_regions_avl);
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vmp->vm_region_top = 0;
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#if VMSTATS
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vmp->vm_bytecopies = 0;
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#endif
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}
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void clear_proc(struct vmproc *vmp)
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{
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region_init(&vmp->vm_regions_avl);
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vmp->vm_region_top = 0;
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vmp->vm_callback = NULL; /* No pending vfs callback. */
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vmp->vm_flags = 0; /* Clear INUSE, so slot is free. */
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vmp->vm_yielded = 0;
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#if VMSTATS
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vmp->vm_bytecopies = 0;
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#endif
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}
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/*===========================================================================*
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* do_exit *
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*===========================================================================*/
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int do_exit(message *msg)
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{
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int proc;
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struct vmproc *vmp;
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SANITYCHECK(SCL_FUNCTIONS);
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if(vm_isokendpt(msg->VME_ENDPOINT, &proc) != OK) {
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printf("VM: bogus endpoint VM_EXIT %d\n", msg->VME_ENDPOINT);
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return EINVAL;
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}
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vmp = &vmproc[proc];
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if(!(vmp->vm_flags & VMF_EXITING)) {
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printf("VM: unannounced VM_EXIT %d\n", msg->VME_ENDPOINT);
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return EINVAL;
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}
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{
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/* Free pagetable and pages allocated by pt code. */
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SANITYCHECK(SCL_DETAIL);
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free_proc(vmp);
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SANITYCHECK(SCL_DETAIL);
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}
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SANITYCHECK(SCL_DETAIL);
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/* Reset process slot fields. */
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clear_proc(vmp);
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SANITYCHECK(SCL_FUNCTIONS);
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return OK;
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}
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/*===========================================================================*
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* do_willexit *
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*===========================================================================*/
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int do_willexit(message *msg)
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{
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int proc;
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struct vmproc *vmp;
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if(vm_isokendpt(msg->VMWE_ENDPOINT, &proc) != OK) {
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printf("VM: bogus endpoint VM_EXITING %d\n",
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msg->VMWE_ENDPOINT);
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return EINVAL;
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}
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vmp = &vmproc[proc];
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vmp->vm_flags |= VMF_EXITING;
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return OK;
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}
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int do_procctl(message *msg)
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{
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endpoint_t proc;
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struct vmproc *vmp;
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if(vm_isokendpt(msg->VMPCTL_WHO, &proc) != OK) {
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printf("VM: bogus endpoint VM_PROCCTL %d\n",
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msg->VMPCTL_WHO);
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return EINVAL;
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}
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vmp = &vmproc[proc];
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switch(msg->VMPCTL_PARAM) {
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case VMPPARAM_CLEAR:
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if(msg->m_source != RS_PROC_NR
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&& msg->m_source != VFS_PROC_NR)
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return EPERM;
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free_proc(vmp);
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if(pt_new(&vmp->vm_pt) != OK)
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panic("VMPPARAM_CLEAR: pt_new failed");
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pt_bind(&vmp->vm_pt, vmp);
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return OK;
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default:
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return EINVAL;
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}
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return OK;
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}
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