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#!/usr/bin/env python
# Copyright (c) PLUMgrid, Inc.
# Licensed under the Apache License, Version 2.0 (the "License")
from bcc import BPF
import os
import sys
from unittest import main, TestCase
class TestKprobeMaxactive(TestCase):
def setUp(self):
self.b = BPF(text=b"""
typedef struct { int idx; } Key;
typedef struct { u64 val; } Val;
BPF_HASH(stats, Key, Val, 3);
int hello(void *ctx) {
Val *val = stats.lookup_or_init(&(Key){1}, &(Val){0});
val->val++;
return 0;
}
int goodbye(void *ctx) {
Val *val = stats.lookup_or_init(&(Key){2}, &(Val){0});
val->val++;
return 0;
}
""")
self.b.attach_kprobe(event_re=self.b.get_syscall_prefix() + b"bpf",
fn_name=b"hello")
self.b.attach_kretprobe(event_re=self.b.get_syscall_prefix() + b"bpf",
fn_name=b"goodbye", maxactive=128)
def test_send1(self):
k1 = self.b[b"stats"].Key(1)
k2 = self.b[b"stats"].Key(2)
self.assertTrue(self.b[b"stats"][k1].val >= 2)
self.assertTrue(self.b[b"stats"][k2].val == 1)
if __name__ == "__main__":
main()
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