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vm: report cropped region sizes

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. when reporting on regions, only report part of the
	  region (addr and length) that really has memory mapped
	  into it
	. to minimise core files
This commit is contained in:
Ben Gras 2011-11-26 15:12:17 +00:00
parent 39b1aee2e1
commit ef99a7a3dc
1 changed files with 13 additions and 3 deletions
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16
servers/vm/region.c
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@ -1991,9 +1991,19 @@ PUBLIC int get_region_info(struct vmproc *vmp, struct vm_region_info *vri,
if(!(vr = region_get_iter(&v_iter))) return 0;
for(count = 0; (vr = region_get_iter(&v_iter)) && count < max; count++, vri++) {
vri->vri_addr = arch_map2info(vmp, vr->vaddr, &vri->vri_seg,
&vri->vri_prot);
vri->vri_length = vr->length;
struct phys_region *ph1, *ph2;
/* Report part of the region that's actually in use. */
/* Get first and last phys_regions, if any */
ph1 = physr_search_least(vr->phys);
ph2 = physr_search_greatest(vr->phys);
if(!ph1 || !ph2) { assert(!ph1 && !ph2); continue; }
/* Report start+length of region starting from lowest use. */
vri->vri_addr = arch_map2info(vmp, vr->vaddr + ph1->offset,
&vri->vri_seg, &vri->vri_prot);
vri->vri_length = ph2->offset + ph2->ph->length - ph1->offset;
/* "AND" the provided protection with per-page protection. */
if (!(vr->flags & VR_WRITABLE))