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upload android base code part6

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August 2018-08-08 17:48:24 +08:00
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android/system/extras/ioshark/compile_ioshark_subr.c Normal file
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/*
* Copyright (C) 2016 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 <fcntl.h>
#include <stdio.h>
#include <sys/types.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/errno.h>
#include "ioshark.h"
#include "compile_ioshark.h"
extern char *progname;
static struct files_db_s *files_db_buckets[FILE_DB_HASHSIZE];
static int current_fileno = 1;
static int num_objects = 0;
static int filename_cache_lookup(char *filename);;
void
files_db_write_objects(FILE *fp)
{
int i;
struct ioshark_file_state st;
for (i = 0 ; i < FILE_DB_HASHSIZE ; i++) {
struct files_db_s *db_node, *s;
db_node = files_db_buckets[i];
while (db_node != NULL) {
st.fileno = db_node->fileno;
st.size = db_node->size;
st.global_filename_ix =
db_node->global_filename_ix;
if (fwrite(&st, sizeof(st), 1, fp) != 1) {
fprintf(stderr,
"%s Write error trace.outfile\n",
progname);
exit(EXIT_FAILURE);
}
s = db_node;
db_node = db_node->next;
free(s->filename);
free(s);
}
}
}
void *files_db_lookup(char *pathname)
{
u_int32_t hash;
struct files_db_s *db_node;
hash = jenkins_one_at_a_time_hash(pathname, strlen(pathname));
hash %= FILE_DB_HASHSIZE;
db_node = files_db_buckets[hash];
while (db_node != NULL) {
if (strcmp(db_node->filename, pathname) == 0)
break;
db_node = db_node->next;
}
return db_node;
}
void *files_db_add(char *filename)
{
u_int32_t hash;
struct files_db_s *db_node;
if ((db_node = files_db_lookup(filename)))
return db_node;
hash = jenkins_one_at_a_time_hash(filename, strlen(filename));
hash %= FILE_DB_HASHSIZE;
db_node = malloc(sizeof(struct files_db_s));
db_node->filename = strdup(filename);
db_node->global_filename_ix =
filename_cache_lookup(filename);
db_node->fileno = current_fileno++;
db_node->next = files_db_buckets[hash];
db_node->size = 0;
files_db_buckets[hash] = db_node;
num_objects++;
return db_node;
}
int
files_db_get_total_obj(void)
{
return num_objects;
}
static struct ioshark_filename_struct *filename_cache;
static int filename_cache_num_entries;
static int filename_cache_size;
void
init_filename_cache(void)
{
static FILE *filename_cache_fp;
struct stat st;
int file_exists = 1;
if (stat("ioshark_filenames", &st) < 0) {
if (errno != ENOENT) {
fprintf(stderr, "%s Can't stat ioshark_filenames file\n",
progname);
exit(EXIT_FAILURE);
} else {
file_exists = 0;
filename_cache_num_entries = 0;
}
} else {
filename_cache_num_entries = st.st_size /
sizeof(struct ioshark_filename_struct);
}
if (file_exists) {
filename_cache_fp = fopen("ioshark_filenames", "r");
if (filename_cache_fp == NULL) {
fprintf(stderr, "%s Cannot open ioshark_filenames file\n",
progname);
exit(EXIT_FAILURE);
}
}
/* Preallocate a fixed size of entries */
filename_cache_size = filename_cache_num_entries + 1024;
filename_cache = calloc(filename_cache_size,
sizeof(struct ioshark_filename_struct));
if (filename_cache == NULL) {
fprintf(stderr, "%s Can't allocate memory - this is fatal\n",
__func__);
exit(EXIT_FAILURE);
}
if (fread(filename_cache,
sizeof(struct ioshark_filename_struct),
filename_cache_num_entries,
filename_cache_fp) != (size_t)filename_cache_num_entries) {
fprintf(stderr, "%s Can't read ioshark_filenames file\n",
progname);
exit(EXIT_FAILURE);
}
if (file_exists)
fclose(filename_cache_fp);
}
static int
filename_cache_lookup(char *filename)
{
int ret;
int i;
for (i = 0 ; i < filename_cache_num_entries ; i++) {
if (strcmp(filename_cache[i].path, filename) == 0)
return i;
}
if (filename_cache_num_entries >= filename_cache_size) {
int newsize;
/* reallocate the filename cache up first */
filename_cache_size += 1024;
newsize = filename_cache_size *
sizeof(struct ioshark_filename_struct);
filename_cache = realloc(filename_cache, newsize);
if (filename_cache == NULL) {
fprintf(stderr,
"%s Can't allocate memory - this is fatal\n",
__func__);
exit(EXIT_FAILURE);
}
}
strcpy(filename_cache[filename_cache_num_entries].path,
filename);
ret = filename_cache_num_entries;
filename_cache_num_entries++;
return ret;
}
void
store_filename_cache(void)
{
static FILE *filename_cache_fp;
filename_cache_fp = fopen("ioshark_filenames", "w+");
if (filename_cache_fp == NULL) {
fprintf(stderr, "%s Cannot open ioshark_filenames file\n",
progname);
exit(EXIT_FAILURE);
}
if (fwrite(filename_cache,
sizeof(struct ioshark_filename_struct),
filename_cache_num_entries,
filename_cache_fp) != (size_t)filename_cache_num_entries) {
fprintf(stderr, "%s Can't read ioshark_filenames file\n",
progname);
exit(EXIT_FAILURE);
}
fclose(filename_cache_fp);
free(filename_cache);
}