// SPDX-License-Identifier: GPL-2.0 /* Copyright (c) 2021 Google LLC. */ #include #include "test_snprintf.skel.h" #include "test_snprintf_single.skel.h" #define EXP_NUM_OUT "-8 9 96 -424242 1337 DABBAD00" #define EXP_NUM_RET sizeof(EXP_NUM_OUT) #define EXP_IP_OUT "127.000.000.001 0000:0000:0000:0000:0000:0000:0000:0001" #define EXP_IP_RET sizeof(EXP_IP_OUT) /* The third specifier, %pB, depends on compiler inlining so don't check it */ #define EXP_SYM_OUT "schedule schedule+0x0/" #define MIN_SYM_RET sizeof(EXP_SYM_OUT) /* The third specifier, %p, is a hashed pointer which changes on every reboot */ #define EXP_ADDR_OUT "0000000000000000 ffff00000add4e55 " #define EXP_ADDR_RET sizeof(EXP_ADDR_OUT "unknownhashedptr") #define EXP_STR_OUT "str1 a b c d e longstr" #define EXP_STR_RET sizeof(EXP_STR_OUT) #define EXP_OVER_OUT "%over" #define EXP_OVER_RET 10 #define EXP_PAD_OUT " 4 000" #define EXP_PAD_RET 900007 #define EXP_NO_ARG_OUT "simple case" #define EXP_NO_ARG_RET 12 #define EXP_NO_BUF_RET 29 void test_snprintf_positive(void) { char exp_addr_out[] = EXP_ADDR_OUT; char exp_sym_out[] = EXP_SYM_OUT; struct test_snprintf *skel; skel = test_snprintf__open_and_load(); if (!ASSERT_OK_PTR(skel, "skel_open")) return; skel->bss->pid = getpid(); if (!ASSERT_OK(test_snprintf__attach(skel), "skel_attach")) goto cleanup; /* trigger tracepoint */ usleep(1); ASSERT_STREQ(skel->bss->num_out, EXP_NUM_OUT, "num_out"); ASSERT_EQ(skel->bss->num_ret, EXP_NUM_RET, "num_ret"); ASSERT_STREQ(skel->bss->ip_out, EXP_IP_OUT, "ip_out"); ASSERT_EQ(skel->bss->ip_ret, EXP_IP_RET, "ip_ret"); ASSERT_OK(memcmp(skel->bss->sym_out, exp_sym_out, sizeof(exp_sym_out) - 1), "sym_out"); ASSERT_LT(MIN_SYM_RET, skel->bss->sym_ret, "sym_ret"); ASSERT_OK(memcmp(skel->bss->addr_out, exp_addr_out, sizeof(exp_addr_out) - 1), "addr_out"); ASSERT_EQ(skel->bss->addr_ret, EXP_ADDR_RET, "addr_ret"); ASSERT_STREQ(skel->bss->str_out, EXP_STR_OUT, "str_out"); ASSERT_EQ(skel->bss->str_ret, EXP_STR_RET, "str_ret"); ASSERT_STREQ(skel->bss->over_out, EXP_OVER_OUT, "over_out"); ASSERT_EQ(skel->bss->over_ret, EXP_OVER_RET, "over_ret"); ASSERT_STREQ(skel->bss->pad_out, EXP_PAD_OUT, "pad_out"); ASSERT_EQ(skel->bss->pad_ret, EXP_PAD_RET, "pad_ret"); ASSERT_STREQ(skel->bss->noarg_out, EXP_NO_ARG_OUT, "no_arg_out"); ASSERT_EQ(skel->bss->noarg_ret, EXP_NO_ARG_RET, "no_arg_ret"); ASSERT_EQ(skel->bss->nobuf_ret, EXP_NO_BUF_RET, "no_buf_ret"); cleanup: test_snprintf__destroy(skel); } #define min(a, b) ((a) < (b) ? (a) : (b)) /* Loads an eBPF object calling bpf_snprintf with up to 10 characters of fmt */ static int load_single_snprintf(char *fmt) { struct test_snprintf_single *skel; int ret; skel = test_snprintf_single__open(); if (!skel) return -EINVAL; memcpy(skel->rodata->fmt, fmt, min(strlen(fmt) + 1, 10)); ret = test_snprintf_single__load(skel); test_snprintf_single__destroy(skel); return ret; } void test_snprintf_negative(void) { ASSERT_OK(load_single_snprintf("valid %d"), "valid usage"); ASSERT_ERR(load_single_snprintf("0123456789"), "no terminating zero"); ASSERT_ERR(load_single_snprintf("%d %d"), "too many specifiers"); ASSERT_ERR(load_single_snprintf("%pi5"), "invalid specifier 1"); ASSERT_ERR(load_single_snprintf("%a"), "invalid specifier 2"); ASSERT_ERR(load_single_snprintf("%"), "invalid specifier 3"); ASSERT_ERR(load_single_snprintf("%12345678"), "invalid specifier 4"); ASSERT_ERR(load_single_snprintf("%--------"), "invalid specifier 5"); ASSERT_ERR(load_single_snprintf("%lc"), "invalid specifier 6"); ASSERT_ERR(load_single_snprintf("%llc"), "invalid specifier 7"); ASSERT_ERR(load_single_snprintf("\x80"), "non ascii character"); ASSERT_ERR(load_single_snprintf("\x1"), "non printable character"); } void test_snprintf(void) { if (test__start_subtest("snprintf_positive")) test_snprintf_positive(); if (test__start_subtest("snprintf_negative")) test_snprintf_negative(); }