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tetragon: Use clang 20 to build bpf objects #4202

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tetragon: Use clang 20 to build bpf objects #4202

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f61a74f
tetragon: Use clang 20 to build bpf objects
olsajiri Oct 17, 2025
cb09202
tetragon: Execute next_selidx function only for large programs
olsajiri Oct 26, 2025
99026b7
tetragon: Disable has_return_copy check for generic tracepoint
olsajiri Oct 25, 2025
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2 changes: 1 addition & 1 deletion Makefile
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Original file line number Diff line number Diff line change
Expand Up @@ -10,7 +10,7 @@ LOCAL_CLANG ?= 0
LOCAL_CLANG_FORMAT ?= 0
FORMAT_FIND_FLAGS ?= -name '*.c' -o -name '*.h'
NOOPT ?= 0
CLANG_IMAGE = quay.io/cilium/clang:b97f5b3d5c38da62fb009f21a53cd42aefd54a2f@sha256:e1c8ed0acd2e24ed05377f2861d8174af28e09bef3bbc79649c8eba165207df0
CLANG_IMAGE = quay.io/cilium/clang:94b9cfd5772185fe8c78c5d558e6d01a49f364dd
TESTER_PROGS_DIR = "contrib/tester-progs"
# Extra flags to pass to test binary
EXTRA_TESTFLAGS ?=
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4 changes: 4 additions & 0 deletions bpf/process/generic_calls.h
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Expand Up @@ -1374,7 +1374,11 @@ FUNC_INLINE long generic_filter_arg(void *ctx, struct bpf_map_def *tailcalls,
selidx = e->tailcall_index_selector;
pass = filter_args(e, selidx & MAX_SELECTORS_MASK, is_entry);
if (!pass) {
#ifdef __LARGE_BPF_PROG
selidx = next_selidx(e, selidx);
#else
selidx += 1;
#endif
if (selidx <= MAX_SELECTORS) {
e->tailcall_index_selector = selidx;
tail_call(ctx, tailcalls, TAIL_CALL_ARGS);
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4 changes: 3 additions & 1 deletion bpf/process/types/basic.h
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Expand Up @@ -1134,17 +1134,19 @@ FUNC_INLINE long
copy_char_iovec(void *ctx, long off, unsigned long arg, int argm,
struct msg_generic_kprobe *e)
{
int *s = (int *)args_off(e, off);
unsigned long meta;

meta = get_arg_meta(argm, e);

#ifndef GENERIC_TRACEPOINT
if (has_return_copy(argm)) {
int *s = (int *)args_off(e, off);
u64 retid = retprobe_map_get_key(ctx);

retprobe_map_set_iovec(e->func_id, retid, e->common.ktime, arg, meta);
return return_error(s, char_buf_saved_for_retprobe);
}
#endif
return __copy_char_iovec(off, arg, meta, 0, e);
}

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