src/plugins/ctf/fs-src/metadata.cpp

   1 /*
   2  * SPDX-License-Identifier: MIT
   3  *
   4  * Copyright 2016 Philippe Proulx <pproulx@efficios.com>
   5  * Copyright 2010-2011 EfficiOS Inc. and Linux Foundation
   6  */
   7
   8 #include "common/assert.h"
   9
  10 #include "../common/src/metadata/tsdl/decoder.hpp"
  11 #include "file.hpp"
  12 #include "fs.hpp"
  13 #include "metadata.hpp"
  14
  15 FILE *ctf_fs_metadata_open_file(const char *trace_path, const bt2c::Logger& logger)
  16 {
  17     GString *metadata_path;
  18     FILE *fp = NULL;
  19
  20     metadata_path = g_string_new(trace_path);
  21     if (!metadata_path) {
  22         goto end;
  23     }
  24
  25     g_string_append(metadata_path, G_DIR_SEPARATOR_S CTF_FS_METADATA_FILENAME);
  26     fp = fopen(metadata_path->str, "rb");
  27     if (!fp) {
  28         BT_CPPLOGE_ERRNO_APPEND_CAUSE_SPEC(logger, "Failed to open metadata file", ": path=\"{}\"",
  29                                            metadata_path->str);
  30     }
  31
  32     g_string_free(metadata_path, TRUE);
  33
  34 end:
  35     return fp;
  36 }
  37
  38 static struct ctf_fs_file *get_file(const char *trace_path, const bt2c::Logger& logger)
  39 {
  40     struct ctf_fs_file *file = ctf_fs_file_create(logger);
  41
  42     if (!file) {
  43         goto error;
  44     }
  45
  46     g_string_append(file->path, trace_path);
  47     g_string_append(file->path, G_DIR_SEPARATOR_S CTF_FS_METADATA_FILENAME);
  48
  49     if (ctf_fs_file_open(file, "rb")) {
  50         goto error;
  51     }
  52
  53     goto end;
  54
  55 error:
  56     if (file) {
  57         ctf_fs_file_destroy(file);
  58         file = NULL;
  59     }
  60
  61 end:
  62     return file;
  63 }
  64
  65 int ctf_fs_metadata_set_trace_class(bt_self_component *self_comp, struct ctf_fs_trace *ctf_fs_trace,
  66                                     const ctf::src::ClkClsCfg& clkClsCfg)
  67 {
  68     int ret = 0;
  69     struct ctf_fs_file *file = NULL;
  70     ctf_metadata_decoder_config decoder_config {ctf_fs_trace->logger};
  71
  72     decoder_config.self_comp = self_comp;
  73     decoder_config.clkClsCfg = clkClsCfg;
  74     decoder_config.create_trace_class = true;
  75
  76     file = get_file(ctf_fs_trace->path->str, ctf_fs_trace->logger);
  77     if (!file) {
  78         BT_CPPLOGE_SPEC(ctf_fs_trace->logger, "Cannot create metadata file object.");
  79         ret = -1;
  80         goto end;
  81     }
  82
  83     ctf_fs_trace->metadata->decoder = ctf_metadata_decoder_create(&decoder_config);
  84     if (!ctf_fs_trace->metadata->decoder) {
  85         BT_CPPLOGE_SPEC(ctf_fs_trace->logger, "Cannot create metadata decoder object.");
  86         ret = -1;
  87         goto end;
  88     }
  89
  90     ret = ctf_metadata_decoder_append_content(ctf_fs_trace->metadata->decoder.get(), file->fp);
  91     if (ret) {
  92         BT_CPPLOGE_SPEC(ctf_fs_trace->logger, "Cannot update metadata decoder's content.");
  93         goto end;
  94     }
  95
  96     ctf_fs_trace->metadata->trace_class =
  97         ctf_metadata_decoder_get_ir_trace_class(ctf_fs_trace->metadata->decoder.get());
  98     BT_ASSERT(!self_comp || ctf_fs_trace->metadata->trace_class);
  99     ctf_fs_trace->metadata->tc =
 100         ctf_metadata_decoder_borrow_ctf_trace_class(ctf_fs_trace->metadata->decoder.get());
 101     BT_ASSERT(ctf_fs_trace->metadata->tc);
 102
 103 end:
 104     ctf_fs_file_destroy(file);
 105     return ret;
 106 }
 107
 108 int ctf_fs_metadata_init(struct ctf_fs_metadata *)
 109 {
 110     /* Nothing to initialize for the moment. */
 111     return 0;
 112 }
 113
 114 void ctf_fs_metadata_fini(struct ctf_fs_metadata *metadata)
 115 {
 116     free(metadata->text);
 117
 118     if (metadata->trace_class) {
 119         BT_TRACE_CLASS_PUT_REF_AND_RESET(metadata->trace_class);
 120     }
 121
 122     metadata->decoder.reset();
 123 }