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| author | Paul Buetow <paul@buetow.org> | 2026-05-23 20:10:43 +0300 |
|---|---|---|
| committer | Paul Buetow <paul@buetow.org> | 2026-05-23 20:10:43 +0300 |
| commit | 4e67c348ef1dc2c0d08f3e90c2affb555b205d0e (patch) | |
| tree | 5006f1f9c0e27040a2143d63f5cc0dd472f6ce63 /internal/generate/bpfhandler.go | |
| parent | a2151af07c58efa3bf541e0273702ae991eda799 (diff) | |
2c fix epoll_create and pidfd_open flags in BPF codegen
epoll_create(size) was recording size (args[0]) as flags — hardcode to
0 since the syscall has no flags argument. pidfd_open(pid, flags) was
recording pid (args[0]) as flags — use args[1] instead.
Add test fixtures and codegen tests that verify the correct argument
indexes and reject the old wrong ones. Regenerate generated_tracepoints.c.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
Diffstat (limited to 'internal/generate/bpfhandler.go')
| -rw-r--r-- | internal/generate/bpfhandler.go | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/internal/generate/bpfhandler.go b/internal/generate/bpfhandler.go index 95a14b0..3d3db4a 100644 --- a/internal/generate/bpfhandler.go +++ b/internal/generate/bpfhandler.go @@ -281,7 +281,7 @@ func generateExtraPipe(f *Format, isEnter bool) string { // that captures the flags argument. Syscalls not listed here default to "0". // To add a new eventfd-like syscall, register its flags expression below. var eventfdFlagsExpr = map[string]string{ - "sys_enter_epoll_create": "(__s32)ctx->args[0]", + "sys_enter_epoll_create": "0", // epoll_create(size) has no flags argument "sys_enter_epoll_create1": "(__s32)ctx->args[0]", "sys_enter_inotify_init1": "(__s32)ctx->args[0]", "sys_enter_fanotify_init": "(__s32)ctx->args[0]", @@ -292,7 +292,7 @@ var eventfdFlagsExpr = map[string]string{ "sys_enter_userfaultfd": "(__s32)ctx->args[0]", "sys_enter_signalfd4": "(__s32)ctx->args[3]", "sys_enter_timerfd_create": "(__s32)ctx->args[1]", - "sys_enter_pidfd_open": "(__s32)ctx->args[0]", + "sys_enter_pidfd_open": "(__s32)ctx->args[1]", // pidfd_open(pid, flags): flags at args[1] "sys_enter_fsmount": "(__s32)ctx->args[1]", "sys_enter_fsopen": "(__s32)ctx->args[1]", } |