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
kgsl_memtrack_get_memory(pid_t pid,enum memtrack_type type,struct memtrack_record * records,size_t * num_records)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, mapsize;
87 char line_type[7];
88 char flags[9];
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 mapsize
98 * 545ba000 545ba000 4096 1 -----pY gpumem arraybuffer 1 4096
99 */
100 ret = sscanf(line, "%*x %*lx %lu %*d %8s %6s %18s %*d %lu\n",
101 &size, flags, line_type, line_usage, &mapsize);
102 if (ret != 5) {
103 continue;
104 }
105
106 if (type == MEMTRACK_TYPE_GL && strcmp(line_type, "gpumem") == 0) {
107
108 if (flags[6] == 'Y') {
109 accounted_size += mapsize;
110 unaccounted_size += size - mapsize;
111 } else
112 unaccounted_size += size;
113
114 } else if (type == MEMTRACK_TYPE_GRAPHICS && strcmp(line_type, "ion") == 0) {
115 if (!is_surfaceflinger || strcmp(line_usage, "egl_image") != 0) {
116 unaccounted_size += size;
117 }
118 }
119 }
120
121 if (allocated_records > 0) {
122 records[0].size_in_bytes = accounted_size;
123 }
124 if (allocated_records > 1) {
125 records[1].size_in_bytes = unaccounted_size;
126 }
127
128 fclose(fp);
129
130 return 0;
131 }
132