#include <dirent.h>
#include <unistd.h>
+#include <babeltrace/ctf-ir/metadata.h> /* for clocks */
+
#define DEFAULT_FILE_ARRAY_SIZE 1
static char *opt_input_format;
static char *opt_output_format;
static void init_trace_collection(struct trace_collection *tc)
{
tc->array = g_ptr_array_sized_new(DEFAULT_FILE_ARRAY_SIZE);
+ tc->clocks = g_hash_table_new(g_direct_hash, g_direct_equal);
}
/*
fmt_read->close_trace(temp);
}
g_ptr_array_free(tc->array, TRUE);
+ g_hash_table_destroy(tc->clocks);
+}
+
+struct clock_match {
+ GHashTable *clocks;
+ struct ctf_clock *clock_match;
+};
+
+static void check_clock_match(gpointer key, gpointer value, gpointer user_data)
+{
+ struct clock_match *match = user_data;
+ struct ctf_clock *clock_a = value, *clock_b;
+
+ if (clock_a->uuid != 0) {
+ /*
+ * Lookup the the trace clocks into the collection
+ * clocks.
+ */
+ clock_b = g_hash_table_lookup(match->clocks,
+ (gpointer) (unsigned long) clock_a->uuid);
+ if (clock_b) {
+ match->clock_match = clock_b;
+ return;
+ }
+ } else if (clock_a->absolute) {
+ /*
+ * Absolute time references, such as NTP, are looked up
+ * by clock name.
+ */
+ clock_b = g_hash_table_lookup(match->clocks,
+ (gpointer) (unsigned long) clock_a->name);
+ if (clock_b) {
+ match->clock_match = clock_b;
+ return;
+ }
+ }
+}
+
+static void clock_add(gpointer key, gpointer value, gpointer user_data)
+{
+ GHashTable *tc_clocks = user_data;
+ struct ctf_clock *t_clock = value;
+ GQuark v;
+
+ if (t_clock->absolute)
+ v = t_clock->name;
+ else
+ v = t_clock->uuid;
+ if (v)
+ g_hash_table_insert(tc_clocks,
+ (gpointer) (unsigned long) v,
+ value);
}
-static void trace_collection_add(struct trace_collection *tc,
- struct trace_descriptor *td)
+/*
+ * Whenever we add a trace to the trace collection, check that we can
+ * correlate this trace with at least one other clock in the trace.
+ */
+static int trace_collection_add(struct trace_collection *tc,
+ struct trace_descriptor *td)
{
+ struct ctf_trace *trace = container_of(td, struct ctf_trace, parent);
+
g_ptr_array_add(tc->array, td);
+
+ if (tc->array->len > 1) {
+ struct clock_match clock_match = {
+ .clocks = tc->clocks,
+ .clock_match = NULL,
+ };
+
+ /*
+ * With two or more traces, we need correlation info
+ * avalable.
+ */
+ g_hash_table_foreach(trace->clocks,
+ check_clock_match,
+ &clock_match);
+ if (!clock_match.clock_match) {
+ fprintf(stderr, "[error] No clocks can be correlated and multiple traces are added to the collection.\n");
+ goto error;
+ }
+ }
+ /*
+ * Add each clock from the trace clocks into the trace
+ * collection clocks.
+ */
+ g_hash_table_foreach(trace->clocks,
+ clock_add,
+ tc->clocks);
+ return 0;
+error:
+ return -EPERM;
}
int convert_trace(struct trace_descriptor *td_write,
int dirfd;
int fd;
struct trace_descriptor *td_read;
+ int ret;
if (tflag != FTW_D)
return 0;
"for reading.\n\n", fpath);
return -1; /* error */
}
- trace_collection_add(&trace_collection_read, td_read);
+ ret = trace_collection_add(&trace_collection_read, td_read);
+ if (ret) {
+ return -1;
+ }
}
return 0; /* success */
}