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bc72742beb
Update uprobe_autoattach selftest to validate architecture-specific argument passing through registers. Use new BPF_UPROBE and BPF_URETPROBE, and construct both BPF-side and user-space side in such a way that for different architectures we are fetching and checking different number of arguments, matching architecture-specific limit of how many registers are available for argument passing. Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Tested-by: Alan Maguire <alan.maguire@oracle.com> # arm64 Tested-by: Ilya Leoshkevich <iii@linux.ibm.com> # s390x Link: https://lore.kernel.org/bpf/20230120200914.3008030-12-andrii@kernel.org
73 lines
2.2 KiB
C
73 lines
2.2 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/* Copyright (c) 2022, Oracle and/or its affiliates. */
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#include <test_progs.h>
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#include "test_uprobe_autoattach.skel.h"
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#include "progs/bpf_misc.h"
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/* uprobe attach point */
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static noinline int autoattach_trigger_func(int arg1, int arg2, int arg3,
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int arg4, int arg5, int arg6,
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int arg7, int arg8)
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{
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asm volatile ("");
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return arg1 + arg2 + arg3 + arg4 + arg5 + arg6 + arg7 + arg8 + 1;
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}
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void test_uprobe_autoattach(void)
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{
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struct test_uprobe_autoattach *skel;
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int trigger_ret;
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size_t malloc_sz = 1;
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char *mem;
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skel = test_uprobe_autoattach__open_and_load();
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if (!ASSERT_OK_PTR(skel, "skel_open"))
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return;
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if (!ASSERT_OK(test_uprobe_autoattach__attach(skel), "skel_attach"))
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goto cleanup;
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skel->bss->test_pid = getpid();
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/* trigger & validate uprobe & uretprobe */
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trigger_ret = autoattach_trigger_func(1, 2, 3, 4, 5, 6, 7, 8);
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skel->bss->test_pid = getpid();
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/* trigger & validate shared library u[ret]probes attached by name */
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mem = malloc(malloc_sz);
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ASSERT_EQ(skel->bss->uprobe_byname_parm1, 1, "check_uprobe_byname_parm1");
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ASSERT_EQ(skel->bss->uprobe_byname_ran, 1, "check_uprobe_byname_ran");
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ASSERT_EQ(skel->bss->uretprobe_byname_rc, trigger_ret, "check_uretprobe_byname_rc");
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ASSERT_EQ(skel->bss->uretprobe_byname_ret, trigger_ret, "check_uretprobe_byname_ret");
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ASSERT_EQ(skel->bss->uretprobe_byname_ran, 2, "check_uretprobe_byname_ran");
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ASSERT_EQ(skel->bss->uprobe_byname2_parm1, malloc_sz, "check_uprobe_byname2_parm1");
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ASSERT_EQ(skel->bss->uprobe_byname2_ran, 3, "check_uprobe_byname2_ran");
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ASSERT_EQ(skel->bss->uretprobe_byname2_rc, mem, "check_uretprobe_byname2_rc");
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ASSERT_EQ(skel->bss->uretprobe_byname2_ran, 4, "check_uretprobe_byname2_ran");
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ASSERT_EQ(skel->bss->a[0], 1, "arg1");
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ASSERT_EQ(skel->bss->a[1], 2, "arg2");
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ASSERT_EQ(skel->bss->a[2], 3, "arg3");
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#if FUNC_REG_ARG_CNT > 3
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ASSERT_EQ(skel->bss->a[3], 4, "arg4");
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#endif
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#if FUNC_REG_ARG_CNT > 4
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ASSERT_EQ(skel->bss->a[4], 5, "arg5");
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#endif
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#if FUNC_REG_ARG_CNT > 5
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ASSERT_EQ(skel->bss->a[5], 6, "arg6");
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#endif
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#if FUNC_REG_ARG_CNT > 6
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ASSERT_EQ(skel->bss->a[6], 7, "arg7");
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#endif
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#if FUNC_REG_ARG_CNT > 7
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ASSERT_EQ(skel->bss->a[7], 8, "arg8");
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#endif
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free(mem);
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cleanup:
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test_uprobe_autoattach__destroy(skel);
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}
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