[FEATURE] Support kernel helper 'bpf_get_stackid'

[Mr-dot-lu]

In some AI and big data scenarios, to improve memory application performance, some software takes over memory management instead of using the memory application interface provided by the OS. Whether bpf-time can support the bpf_get_stackid helper to obtain application software stacks to support memory profiling in the preceding scenarios.

struct { uint(type, BPF_MAP_TYPE_STACK_TRACE); uint(key_size, sizeof(u32)); uint(value_size, PERF_MAX_STACK_DEPTH * sizeof(u64)); uint(max_entries, MAX_PERCPU_SAMPLE_COUNT); } stackmap SEC(".maps");

bpf_section("tracepoint/[application-malloc]") { int user_stack_id = bpf_get_stackid(ctx, &stackmap, USER_STACKID_FLAGS);

// insert 'user_stack_id' to 'buf', and output to ebpf userspace

bpf_perf_event_output(ctx, map, BPF_F_CURRENT_CPU, buf, size);

}

[Officeyutong]

It seems possible to be achived through gumbacktrace provided by frida https://github.com/frida/frida-gum/blob/main/gum/gumbacktracer.h