140 lines
2.6 KiB
C
140 lines
2.6 KiB
C
/* Copyright (c) 2021-2023 Barcelona Supercomputing Center (BSC)
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* SPDX-License-Identifier: GPL-3.0-or-later */
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#define _XOPEN_SOURCE 500
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#include "trace.h"
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#include "utlist.h"
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#include "path.h"
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#include <stdlib.h>
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#include <string.h>
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#include <ftw.h>
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/* See the nftw(3) manual to see why we need a global variable here:
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* https://pubs.opengroup.org/onlinepubs/9699919799/functions/nftw.html */
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static struct trace *cur_trace = NULL;
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static void
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add_stream(struct trace *trace, struct stream *stream)
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{
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DL_APPEND(trace->streams, stream);
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trace->nstreams++;
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}
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static int
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load_stream(struct trace *trace, const char *path)
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{
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struct stream *stream = calloc(1, sizeof(struct stream));
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if (stream == NULL) {
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perror("calloc failed");
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return -1;
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}
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int offset = strlen(trace->tracedir);
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const char *relpath = path + offset;
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/* Skip begin slashes */
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while (relpath[0] == '/') relpath++;
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if (stream_load(stream, trace->tracedir, relpath) != 0) {
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err("emu_steam_load failed");
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return -1;
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}
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add_stream(trace, stream);
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return 0;
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}
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static int
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has_suffix(const char *str, const char *suffix)
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{
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if (!str || !suffix)
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return 0;
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int lenstr = strlen(str);
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int lensuffix = strlen(suffix);
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if (lensuffix > lenstr)
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return 0;
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const char *p = str + lenstr - lensuffix;
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if (strncmp(p, suffix, lensuffix) == 0)
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return 1;
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return 0;
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}
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static int
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is_stream(const char *fpath)
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{
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if (has_suffix(fpath, OVNI_STREAM_EXT))
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return 1;
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/* For compatibility load the old streams too */
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const char *filename = path_filename(fpath);
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const char prefix[] = "thread.";
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if (!path_has_prefix(filename, prefix))
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return 0;
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const char *tid = filename + strlen(prefix);
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for (int i = 0; tid[i]; i++) {
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if (tid[i] < '0' || tid[i] > '9')
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return 0;
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}
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return 1;
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}
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static int
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cb_nftw(const char *fpath, const struct stat *sb,
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int typeflag, struct FTW *ftwbuf)
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{
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UNUSED(sb);
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UNUSED(ftwbuf);
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if (typeflag != FTW_F)
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return 0;
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if (!is_stream(fpath))
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return 0;
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return load_stream(cur_trace, fpath);
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}
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static int
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cmp_streams(struct stream *a, struct stream *b)
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{
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return strcmp(a->relpath, b->relpath);
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}
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int
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trace_load(struct trace *trace, const char *tracedir)
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{
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memset(trace, 0, sizeof(struct trace));
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cur_trace = trace;
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if (snprintf(trace->tracedir, PATH_MAX, "%s", tracedir) >= PATH_MAX) {
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err("path too long: %s", tracedir);
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return -1;
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}
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/* Search recursively all streams in the trace directory */
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if (nftw(tracedir, cb_nftw, 50, 0) != 0) {
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err("nftw failed");
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return -1;
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}
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cur_trace = NULL;
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/* Sort the streams */
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DL_SORT(trace->streams, cmp_streams);
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err("loaded %ld streams", trace->nstreams);
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return 0;
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}
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