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perf bpf: Provide a weak btf__load_from_kernel_by_id() for older libbpf versions

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The btf__get_from_id() function was deprecated in favour of
btf__load_from_kernel_by_id(), but it is still avaiable, so use it to
provide a weak function btf__load_from_kernel_by_id() for older libbpf
when building perf with LIBBPF_DYNAMIC=1, i.e. using the system's libbpf
package.

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Arnaldo Carvalho de Melo 2021-09-10 17:26:53 -03:00
parent 37ce9e4fc5
commit 218e7b775d
1 changed files with 8 additions and 0 deletions
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8
tools/perf/util/bpf-event.c
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@ -21,6 +21,14 @@
#include "record.h"
#include "util/synthetic-events.h"
struct btf * __weak btf__load_from_kernel_by_id(__u32 id)
{
struct btf *btf;
int err = btf__get_from_id(id, &btf);
return err ? ERR_PTR(err) : btf;
}
#define ptr_to_u64(ptr) ((__u64)(unsigned long)(ptr))
static int snprintf_hex(char *buf, size_t size, unsigned char *data, size_t len)