1 /* 2 * Copyright (C) 2008 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #include <stdlib.h> 18 #include <string.h> 19 20 #include <pagemap/pagemap.h> 21 22 int pm_map_pagemap(pm_map_t *map, uint64_t **pagemap_out, size_t *len) { 23 if (!map) 24 return -1; 25 26 return pm_process_pagemap_range(map->proc, map->start, map->end, 27 pagemap_out, len); 28 } 29 30 int pm_map_usage_flags(pm_map_t *map, pm_memusage_t *usage_out, 31 uint64_t flags_mask, uint64_t required_flags) { 32 uint64_t *pagemap; 33 size_t len, i; 34 uint64_t count; 35 pm_memusage_t usage; 36 int error; 37 38 if (!map || !usage_out) 39 return -1; 40 41 error = pm_map_pagemap(map, &pagemap, &len); 42 if (error) return error; 43 44 pm_memusage_zero(&usage); 45 pm_memusage_pswap_init_handle(&usage, usage_out->p_swap); 46 47 for (i = 0; i < len; i++) { 48 usage.vss += map->proc->ker->pagesize; 49 50 if (!PM_PAGEMAP_PRESENT(pagemap[i]) && 51 !PM_PAGEMAP_SWAPPED(pagemap[i])) 52 continue; 53 54 if (!PM_PAGEMAP_SWAPPED(pagemap[i])) { 55 if (flags_mask) { 56 uint64_t flags; 57 error = pm_kernel_flags(map->proc->ker, PM_PAGEMAP_PFN(pagemap[i]), 58 &flags); 59 if (error) goto out; 60 61 if ((flags & flags_mask) != required_flags) 62 continue; 63 } 64 65 error = pm_kernel_count(map->proc->ker, PM_PAGEMAP_PFN(pagemap[i]), 66 &count); 67 if (error) goto out; 68 69 usage.rss += (count >= 1) ? map->proc->ker->pagesize : (0); 70 usage.pss += (count >= 1) ? (map->proc->ker->pagesize / count) : (0); 71 usage.uss += (count == 1) ? (map->proc->ker->pagesize) : (0); 72 } else { 73 usage.swap += map->proc->ker->pagesize; 74 pm_memusage_pswap_add_offset(&usage, PM_PAGEMAP_SWAP_OFFSET(pagemap[i])); 75 } 76 } 77 78 memcpy(usage_out, &usage, sizeof(usage)); 79 80 error = 0; 81 82 out: 83 free(pagemap); 84 85 return error; 86 } 87 88 int pm_map_usage(pm_map_t *map, pm_memusage_t *usage_out) { 89 return pm_map_usage_flags(map, usage_out, 0, 0); 90 } 91 92 int pm_map_workingset(pm_map_t *map, pm_memusage_t *ws_out) { 93 uint64_t *pagemap; 94 size_t len, i; 95 uint64_t count, flags; 96 pm_memusage_t ws; 97 int error; 98 99 if (!map || !ws_out) 100 return -1; 101 102 error = pm_map_pagemap(map, &pagemap, &len); 103 if (error) return error; 104 105 pm_memusage_zero(&ws); 106 107 for (i = 0; i < len; i++) { 108 error = pm_kernel_flags(map->proc->ker, PM_PAGEMAP_PFN(pagemap[i]), 109 &flags); 110 if (error) goto out; 111 112 if (!(flags & PM_PAGE_REFERENCED)) 113 continue; 114 115 error = pm_kernel_count(map->proc->ker, PM_PAGEMAP_PFN(pagemap[i]), 116 &count); 117 if (error) goto out; 118 119 ws.vss += map->proc->ker->pagesize; 120 if( PM_PAGEMAP_SWAPPED(pagemap[i]) ) continue; 121 ws.rss += (count >= 1) ? (map->proc->ker->pagesize) : (0); 122 ws.pss += (count >= 1) ? (map->proc->ker->pagesize / count) : (0); 123 ws.uss += (count == 1) ? (map->proc->ker->pagesize) : (0); 124 } 125 126 memcpy(ws_out, &ws, sizeof(ws)); 127 128 error = 0; 129 130 out: 131 free(pagemap); 132 133 return 0; 134 } 135 136 int pm_map_destroy(pm_map_t *map) { 137 if (!map) 138 return -1; 139 140 free(map->name); 141 free(map); 142 143 return 0; 144 } 145
