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/*
* Copyright (C) 2008 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <stdlib.h>
#include <string.h>
#include <pagemap/pagemap.h>
int pm_map_pagemap(pm_map_t *map, uint64_t **pagemap_out, size_t *len) {
if (!map)
return -1;
return pm_process_pagemap_range(map->proc, map->start, map->end,
pagemap_out, len);
}
int pm_map_usage_flags(pm_map_t *map, pm_memusage_t *usage_out,
uint64_t flags_mask, uint64_t required_flags) {
uint64_t *pagemap;
size_t len, i;
uint64_t count;
pm_memusage_t usage;
int error;
if (!map || !usage_out)
return -1;
error = pm_map_pagemap(map, &pagemap, &len);
if (error) return error;
pm_memusage_zero(&usage);
pm_memusage_pswap_init_handle(&usage, usage_out->p_swap);
for (i = 0; i < len; i++) {
usage.vss += map->proc->ker->pagesize;
if (!PM_PAGEMAP_PRESENT(pagemap[i]) &&
!PM_PAGEMAP_SWAPPED(pagemap[i]))
continue;
if (!PM_PAGEMAP_SWAPPED(pagemap[i])) {
if (flags_mask) {
uint64_t flags;
error = pm_kernel_flags(map->proc->ker, PM_PAGEMAP_PFN(pagemap[i]),
&flags);
if (error) goto out;
if ((flags & flags_mask) != required_flags)
continue;
}
error = pm_kernel_count(map->proc->ker, PM_PAGEMAP_PFN(pagemap[i]),
&count);
if (error) goto out;
usage.rss += (count >= 1) ? map->proc->ker->pagesize : (0);
usage.pss += (count >= 1) ? (map->proc->ker->pagesize / count) : (0);
usage.uss += (count == 1) ? (map->proc->ker->pagesize) : (0);
} else {
usage.swap += map->proc->ker->pagesize;
pm_memusage_pswap_add_offset(&usage, PM_PAGEMAP_SWAP_OFFSET(pagemap[i]));
}
}
memcpy(usage_out, &usage, sizeof(usage));
error = 0;
out:
free(pagemap);
return error;
}
int pm_map_usage(pm_map_t *map, pm_memusage_t *usage_out) {
return pm_map_usage_flags(map, usage_out, 0, 0);
}
int pm_map_workingset(pm_map_t *map, pm_memusage_t *ws_out) {
uint64_t *pagemap;
size_t len, i;
uint64_t count, flags;
pm_memusage_t ws;
int error;
if (!map || !ws_out)
return -1;
error = pm_map_pagemap(map, &pagemap, &len);
if (error) return error;
pm_memusage_zero(&ws);
for (i = 0; i < len; i++) {
error = pm_kernel_flags(map->proc->ker, PM_PAGEMAP_PFN(pagemap[i]),
&flags);
if (error) goto out;
if (!(flags & PM_PAGE_REFERENCED))
continue;
error = pm_kernel_count(map->proc->ker, PM_PAGEMAP_PFN(pagemap[i]),
&count);
if (error) goto out;
ws.vss += map->proc->ker->pagesize;
if( PM_PAGEMAP_SWAPPED(pagemap[i]) ) continue;
ws.rss += (count >= 1) ? (map->proc->ker->pagesize) : (0);
ws.pss += (count >= 1) ? (map->proc->ker->pagesize / count) : (0);
ws.uss += (count == 1) ? (map->proc->ker->pagesize) : (0);
}
memcpy(ws_out, &ws, sizeof(ws));
error = 0;
out:
free(pagemap);
return 0;
}
int pm_map_destroy(pm_map_t *map) {
if (!map)
return -1;
free(map->name);
free(map);
return 0;
}
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