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