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bpf: Add size arg to build_id_parse function

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It's possible to have other build id types (other than default SHA1).
Currently there's also ld support for MD5 build id.

Adding size argument to build_id_parse function, that returns (if defined)
size of the parsed build id, so we can recognize the build id type.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20210114134044.1418404-3-jolsa@kernel.org
This commit is contained in:
Jiri Olsa 2021-01-14 14:40:43 +01:00 • committed by Alexei Starovoitov
parent bd7525dacd
commit 921f88fc89
3 changed files with 24 additions and 10 deletions
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kernel/bpf/stackmap.c
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@ -189,7 +189,7 @@ static void stack_map_get_build_id_offset(struct bpf_stack_build_id *id_offs,
for (i = 0; i < trace_nr; i++) {
vma = find_vma(current->mm, ips[i]);
if (!vma || build_id_parse(vma, id_offs[i].build_id)) {
if (!vma || build_id_parse(vma, id_offs[i].build_id, NULL)) {
/* per entry fall back to ips */
id_offs[i].status = BPF_STACK_BUILD_ID_IP;
id_offs[i].ip = ips[i];