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/*
* Copyright (C) 2013 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <errno.h>
#include <stdio.h>
#include <string.h>
#include <sys/mman.h>
#include <sys/stat.h>
#include <log/log.h>
#include <hardware/memtrack.h>
#include "memtrack_exynos.h"
#define ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0]))
#define min(x, y) ((x) < (y) ? (x) : (y))
#define ION_DEBUG_PATH "/sys/kernel/debug/ion/"
#define ION_DEBUG_CLIENT_PATH "/sys/kernel/debug/ion/clients"
static struct memtrack_record ion_record_templates[] = {
{
.flags = MEMTRACK_FLAG_SMAPS_UNACCOUNTED |
MEMTRACK_FLAG_PRIVATE |
MEMTRACK_FLAG_SYSTEM |
MEMTRACK_FLAG_NONSECURE,
},
};
int ion_memtrack_get_memory(pid_t pid, int __unused type,
struct memtrack_record *records,
size_t *num_records)
{
size_t allocated_records = min(*num_records, ARRAY_SIZE(ion_record_templates));
FILE *fp;
struct stat s;
char line[1024];
char path[64];
*num_records = ARRAY_SIZE(ion_record_templates);
/* fastpath to return the necessary number of records */
if (allocated_records == 0) {
return 0;
}
if (lstat(ION_DEBUG_CLIENT_PATH, &s) == 0)
snprintf(path, sizeof(path), "%s/%d-0", ION_DEBUG_CLIENT_PATH, pid);
else
snprintf(path, sizeof(path), "%s/%d", ION_DEBUG_PATH, pid);
fp = fopen(path, "r");
if (fp == NULL) {
return -errno;
}
memcpy(records, ion_record_templates,
sizeof(struct memtrack_record) * allocated_records);
while (1) {
if (fgets(line, sizeof(line), fp) == NULL) {
break;
}
/* Format:
* heap_name: size_in_bytes
* ion_noncontig_he: 30134272
*/
if (!strncmp(line, "ion_noncontig_he", 16)) {
unsigned int size_in_bytes;
int ret = sscanf(line, "%*s %u\n", &size_in_bytes);
if (ret == 1) {
records[0].size_in_bytes = size_in_bytes;
break;
}
}
}
fclose(fp);
return 0;
}
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