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