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      1 /*
      2  * Copyright (C) 2013 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 <errno.h>
     18 #include <stdbool.h>
     19 #include <stdio.h>
     20 #include <string.h>
     21 #include <sys/mman.h>
     22 
     23 #include <hardware/memtrack.h>
     24 
     25 #include "memtrack_msm.h"
     26 
     27 #define ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0]))
     28 #define min(x, y) ((x) < (y) ? (x) : (y))
     29 
     30 struct memtrack_record record_templates[] = {
     31     {
     32         .flags = MEMTRACK_FLAG_SMAPS_ACCOUNTED |
     33                  MEMTRACK_FLAG_PRIVATE |
     34                  MEMTRACK_FLAG_NONSECURE,
     35     },
     36     {
     37         .flags = MEMTRACK_FLAG_SMAPS_UNACCOUNTED |
     38                  MEMTRACK_FLAG_PRIVATE |
     39                  MEMTRACK_FLAG_NONSECURE,
     40     },
     41 };
     42 
     43 int kgsl_memtrack_get_memory(pid_t pid, enum memtrack_type type,
     44                              struct memtrack_record *records,
     45                              size_t *num_records)
     46 {
     47     size_t allocated_records = min(*num_records, ARRAY_SIZE(record_templates));
     48     int i;
     49     FILE *fp;
     50     char line[1024];
     51     char tmp[128];
     52     bool is_surfaceflinger = false;
     53     size_t accounted_size = 0;
     54     size_t unaccounted_size = 0;
     55 
     56     *num_records = ARRAY_SIZE(record_templates);
     57 
     58     /* fastpath to return the necessary number of records */
     59     if (allocated_records == 0) {
     60         return 0;
     61     }
     62 
     63     snprintf(tmp, sizeof(tmp), "/proc/%d/cmdline", pid);
     64     fp = fopen(tmp, "r");
     65     if (fp != NULL) {
     66         if (fgets(line, sizeof(line), fp)) {
     67             if (strcmp(line, "/system/bin/surfaceflinger") == 0)
     68                 is_surfaceflinger = true;
     69         }
     70         fclose(fp);
     71     }
     72 
     73     memcpy(records, record_templates,
     74            sizeof(struct memtrack_record) * allocated_records);
     75 
     76     sprintf(tmp, "/d/kgsl/proc/%d/mem", pid);
     77     fp = fopen(tmp, "r");
     78     if (fp == NULL) {
     79         return -errno;
     80     }
     81 
     82     /* Go through each line of <pid>/mem file and for every entry of type "gpumem"
     83      * check if the gpubuffer entry is usermapped or not. If the entry is usermapped
     84      * count the entry as accounted else count the entry as unaccounted.
     85      */
     86     while (1) {
     87         unsigned long size;
     88         char line_type[7];
     89         char flags[7];
     90         char line_usage[19];
     91         int ret;
     92 
     93         if (fgets(line, sizeof(line), fp) == NULL) {
     94             break;
     95         }
     96 
     97         /* Format:
     98          *  gpuaddr useraddr     size    id flags       type            usage sglen
     99          * 545ba000 545ba000     4096     1 ----pY     gpumem      arraybuffer     1
    100          */
    101         ret = sscanf(line, "%*x %*lx %lu %*d %6s %6s %18s %*d\n",
    102                      &size, flags, line_type, line_usage);
    103         if (ret != 4) {
    104             continue;
    105         }
    106 
    107         if (type == MEMTRACK_TYPE_GL && strcmp(line_type, "gpumem") == 0) {
    108             if (flags[6] == 'Y')
    109                 accounted_size += size;
    110             else
    111                 unaccounted_size += size;
    112         } else if (type == MEMTRACK_TYPE_GRAPHICS && strcmp(line_type, "ion") == 0) {
    113             if (!is_surfaceflinger || strcmp(line_usage, "egl_image") != 0) {
    114                 unaccounted_size += size;
    115             }
    116         }
    117     }
    118 
    119     if (allocated_records > 0) {
    120         records[0].size_in_bytes = accounted_size;
    121     }
    122     if (allocated_records > 1) {
    123         records[1].size_in_bytes = unaccounted_size;
    124     }
    125 
    126     fclose(fp);
    127 
    128     return 0;
    129 }
    130