1 // SPDX-License-Identifier: GPL-2.0 2 /* Copyright (c) 2020 Facebook */ 3 4 #include <test_progs.h> 5 #include <time.h> 6 #include "test_varlen.skel.h" 7 8 #define CHECK_VAL(got, exp) \ 9 CHECK((got) != (exp), "check", "got %ld != exp %ld\n", \ 10 (long)(got), (long)(exp)) 11 12 void test_varlen(void) 13 { 14 int duration = 0, err; 15 struct test_varlen* skel; 16 struct test_varlen__bss *bss; 17 struct test_varlen__data *data; 18 const char str1[] = "Hello, "; 19 const char str2[] = "World!"; 20 const char exp_str[] = "Hello, \0World!\0"; 21 const int size1 = sizeof(str1); 22 const int size2 = sizeof(str2); 23 24 skel = test_varlen__open_and_load(); 25 if (CHECK(!skel, "skel_open", "failed to open skeleton\n")) 26 return; 27 bss = skel->bss; 28 data = skel->data; 29 30 err = test_varlen__attach(skel); 31 if (CHECK(err, "skel_attach", "skeleton attach failed: %d\n", err)) 32 goto cleanup; 33 34 bss->test_pid = getpid(); 35 36 /* trigger everything */ 37 memcpy(bss->buf_in1, str1, size1); 38 memcpy(bss->buf_in2, str2, size2); 39 bss->capture = true; 40 usleep(1); 41 bss->capture = false; 42 43 CHECK_VAL(bss->payload1_len1, size1); 44 CHECK_VAL(bss->payload1_len2, size2); 45 CHECK_VAL(bss->total1, size1 + size2); 46 CHECK(memcmp(bss->payload1, exp_str, size1 + size2), "content_check", 47 "doesn't match!\n"); 48 49 CHECK_VAL(data->payload2_len1, size1); 50 CHECK_VAL(data->payload2_len2, size2); 51 CHECK_VAL(data->total2, size1 + size2); 52 CHECK(memcmp(data->payload2, exp_str, size1 + size2), "content_check", 53 "doesn't match!\n"); 54 55 CHECK_VAL(data->payload3_len1, size1); 56 CHECK_VAL(data->payload3_len2, size2); 57 CHECK_VAL(data->total3, size1 + size2); 58 CHECK(memcmp(data->payload3, exp_str, size1 + size2), "content_check", 59 "doesn't match!\n"); 60 61 CHECK_VAL(data->payload4_len1, size1); 62 CHECK_VAL(data->payload4_len2, size2); 63 CHECK_VAL(data->total4, size1 + size2); 64 CHECK(memcmp(data->payload4, exp_str, size1 + size2), "content_check", 65 "doesn't match!\n"); 66 67 CHECK_VAL(bss->ret_bad_read, -EFAULT); 68 CHECK_VAL(data->payload_bad[0], 0x42); 69 CHECK_VAL(data->payload_bad[1], 0x42); 70 CHECK_VAL(data->payload_bad[2], 0); 71 CHECK_VAL(data->payload_bad[3], 0x42); 72 CHECK_VAL(data->payload_bad[4], 0x42); 73 cleanup: 74 test_varlen__destroy(skel); 75 } 76