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 46 for (i = 0; i < len; i++) { 47 usage.vss += map->proc->ker->pagesize; 48 49 if (!PM_PAGEMAP_PRESENT(pagemap[i])) 50 continue; 51 52 if (!PM_PAGEMAP_SWAPPED(pagemap[i])) { 53 if (flags_mask) { 54 uint64_t flags; 55 error = pm_kernel_flags(map->proc->ker, PM_PAGEMAP_PFN(pagemap[i]), 56 &flags); 57 if (error) goto out; 58 59 if ((flags & flags_mask) != required_flags) 60 continue; 61 } 62 63 error = pm_kernel_count(map->proc->ker, PM_PAGEMAP_PFN(pagemap[i]), 64 &count); 65 if (error) goto out; 66 67 usage.rss += (count >= 1) ? map->proc->ker->pagesize : (0); 68 usage.pss += (count >= 1) ? (map->proc->ker->pagesize / count) : (0); 69 usage.uss += (count == 1) ? (map->proc->ker->pagesize) : (0); 70 } else { 71 usage.swap += map->proc->ker->pagesize; 72 } 73 } 74 75 memcpy(usage_out, &usage, sizeof(usage)); 76 77 error = 0; 78 79 out: 80 free(pagemap); 81 82 return error; 83 } 84 85 int pm_map_usage(pm_map_t *map, pm_memusage_t *usage_out) { 86 return pm_map_usage_flags(map, usage_out, 0, 0); 87 } 88 89 int pm_map_workingset(pm_map_t *map, pm_memusage_t *ws_out) { 90 uint64_t *pagemap; 91 size_t len, i; 92 uint64_t count, flags; 93 pm_memusage_t ws; 94 int error; 95 96 if (!map || !ws_out) 97 return -1; 98 99 error = pm_map_pagemap(map, &pagemap, &len); 100 if (error) return error; 101 102 pm_memusage_zero(&ws); 103 104 for (i = 0; i < len; i++) { 105 error = pm_kernel_flags(map->proc->ker, PM_PAGEMAP_PFN(pagemap[i]), 106 &flags); 107 if (error) goto out; 108 109 if (!(flags & PM_PAGE_REFERENCED)) 110 continue; 111 112 error = pm_kernel_count(map->proc->ker, PM_PAGEMAP_PFN(pagemap[i]), 113 &count); 114 if (error) goto out; 115 116 ws.vss += map->proc->ker->pagesize; 117 if( PM_PAGEMAP_SWAPPED(pagemap[i]) ) continue; 118 ws.rss += (count >= 1) ? (map->proc->ker->pagesize) : (0); 119 ws.pss += (count >= 1) ? (map->proc->ker->pagesize / count) : (0); 120 ws.uss += (count == 1) ? (map->proc->ker->pagesize) : (0); 121 } 122 123 memcpy(ws_out, &ws, sizeof(ws)); 124 125 error = 0; 126 127 out: 128 free(pagemap); 129 130 return 0; 131 } 132 133 int pm_map_destroy(pm_map_t *map) { 134 if (!map) 135 return -1; 136 137 free(map->name); 138 free(map); 139 140 return 0; 141 } 142
