Generic syscall kprobes #4256
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Generic syscall kprobes #4256
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We currently use sys_enter/sys_exit tracepoints to trace syscalls. These impact performance on hot paths. This change introduces BPF program attachment to syscall entry/exit using kprobes, offering a more efficient mechanism. It handles varying symbol prefixes across architectures and includes 32-bit compat support.
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This was referenced Aug 19, 2024
Same as we have for sys_enter/sys_exit probes, this will allow us to add new events or logic for specific syscalls.
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geyslan
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Aug 22, 2024
| @@ -191,6 +191,7 @@ statfunc int init_program_data(program_data_t *p, void *ctx, u32 event_id) | |||
| p->event->config.submit_for_policies = ~0ULL; | |||
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| if (event_id != NO_EVENT_SUBMIT) { | |||
| p->event->config.submit_for_policies = 0; | |||
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1. Explain what the PR does
feat: Add syscall kprobe support
We currently use sys_enter/sys_exit tracepoints to trace syscalls.
These impact performance on hot paths.
This change introduces BPF program attachment to syscall entry/exit using kprobes,
offering a more efficient mechanism.
It handles varying symbol prefixes across architectures and includes 32-bit compat support.
2. Explain how to test it
3. Other comments
Close #4211