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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     FILE *fp;
     49     char line[1024];
     50     char tmp[128];
     51     bool is_surfaceflinger = false;
     52     size_t accounted_size = 0;
     53     size_t unaccounted_size = 0;
     54 
     55     *num_records = ARRAY_SIZE(record_templates);
     56 
     57     /* fastpath to return the necessary number of records */
     58     if (allocated_records == 0) {
     59         return 0;
     60     }
     61 
     62     snprintf(tmp, sizeof(tmp), "/proc/%d/cmdline", pid);
     63     fp = fopen(tmp, "r");
     64     if (fp != NULL) {
     65         if (fgets(line, sizeof(line), fp)) {
     66             if (strcmp(line, "/system/bin/surfaceflinger") == 0)
     67                 is_surfaceflinger = true;
     68         }
     69         fclose(fp);
     70     }
     71 
     72     memcpy(records, record_templates,
     73            sizeof(struct memtrack_record) * allocated_records);
     74 
     75     snprintf(tmp, sizeof(tmp), "/d/kgsl/proc/%d/mem", pid);
     76     fp = fopen(tmp, "r");
     77     if (fp == NULL) {
     78         return -errno;
     79     }
     80 
     81     /* Go through each line of <pid>/mem file and for every entry of type "gpumem"
     82      * check if the gpubuffer entry is usermapped or not. If the entry is usermapped
     83      * count the entry as accounted else count the entry as unaccounted.
     84      */
     85     while (1) {
     86         unsigned long size;
     87         char line_type[7];
     88         char flags[7];
     89         char line_usage[19];
     90         int ret;
     91 
     92         if (fgets(line, sizeof(line), fp) == NULL) {
     93             break;
     94         }
     95 
     96         /* Format:
     97          *  gpuaddr useraddr     size    id flags       type            usage sglen
     98          * 545ba000 545ba000     4096     1 ----pY     gpumem      arraybuffer     1
     99          */
    100         ret = sscanf(line, "%*x %*x %lu %*d %6s %6s %18s %*d\n",
    101                      &size, flags, line_type, line_usage);
    102         if (ret != 4) {
    103             continue;
    104         }
    105 
    106         if (type == MEMTRACK_TYPE_GL && strcmp(line_type, "gpumem") == 0) {
    107 
    108             if (flags[5] == 'Y')
    109                 accounted_size += size;
    110             else
    111                 unaccounted_size += size;
    112 
    113         } else if (type == MEMTRACK_TYPE_GRAPHICS && strcmp(line_type, "ion") == 0) {
    114             if (!is_surfaceflinger || strcmp(line_usage, "egl_image") != 0) {
    115                 unaccounted_size += size;
    116             }
    117         }
    118     }
    119 
    120     if (allocated_records > 0) {
    121         records[0].size_in_bytes = accounted_size;
    122     }
    123     if (allocated_records > 1) {
    124         records[1].size_in_bytes = unaccounted_size;
    125     }
    126 
    127     fclose(fp);
    128 
    129     return 0;
    130 }
    131