topdown.c
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// SPDX-License-Identifier: GPL-2.0
#include <stdio.h>
#include "pmu.h"
#include "topdown.h"
int topdown_filter_events(const char **attr, char **str, bool use_group)
{
int off = 0;
int i;
int len = 0;
char *s;
for (i = 0; attr[i]; i++) {
if (pmu_have_event("cpu", attr[i])) {
len += strlen(attr[i]) + 1;
attr[i - off] = attr[i];
} else
off++;
}
attr[i - off] = NULL;
*str = malloc(len + 1 + 2);
if (!*str)
return -1;
s = *str;
if (i - off == 0) {
*s = 0;
return 0;
}
if (use_group)
*s++ = '{';
for (i = 0; attr[i]; i++) {
strcpy(s, attr[i]);
s += strlen(s);
*s++ = ',';
}
if (use_group) {
s[-1] = '}';
*s = 0;
} else
s[-1] = 0;
return 0;
}
__weak bool arch_topdown_check_group(bool *warn)
{
*warn = false;
return false;
}
__weak void arch_topdown_group_warn(void)
{
}
__weak bool arch_topdown_sample_read(struct evsel *leader __maybe_unused)
{
return false;
}