98 lines
3.2 KiB
C
98 lines
3.2 KiB
C
|
// SPDX-License-Identifier: GPL-2.0
|
||
|
|
#include <test_progs.h>
|
||
|
|
#include "test_attach_probe.skel.h"
|
||
|
|
|
||
|
|
/* this is how USDT semaphore is actually defined, except volatile modifier */
|
||
|
|
volatile unsigned short uprobe_ref_ctr __attribute__((unused)) __attribute((section(".probes")));
|
||
|
|
|
||
|
|
void test_attach_probe(void)
|
||
|
|
{
|
||
|
|
DECLARE_LIBBPF_OPTS(bpf_uprobe_opts, uprobe_opts);
|
||
|
|
int duration = 0;
|
||
|
|
struct bpf_link *kprobe_link, *kretprobe_link;
|
||
|
|
struct bpf_link *uprobe_link, *uretprobe_link;
|
||
|
|
struct test_attach_probe* skel;
|
||
|
|
size_t uprobe_offset;
|
||
|
|
ssize_t base_addr, ref_ctr_offset;
|
||
|
|
|
||
|
|
base_addr = get_base_addr();
|
||
|
|
if (CHECK(base_addr < 0, "get_base_addr",
|
||
|
|
"failed to find base addr: %zd", base_addr))
|
||
|
|
return;
|
||
|
|
uprobe_offset = get_uprobe_offset(&get_base_addr, base_addr);
|
||
|
|
|
||
|
|
ref_ctr_offset = get_rel_offset((uintptr_t)&uprobe_ref_ctr);
|
||
|
|
if (!ASSERT_GE(ref_ctr_offset, 0, "ref_ctr_offset"))
|
||
|
|
return;
|
||
|
|
|
||
|
|
skel = test_attach_probe__open_and_load();
|
||
|
|
if (CHECK(!skel, "skel_open", "failed to open skeleton\n"))
|
||
|
|
return;
|
||
|
|
if (CHECK(!skel->bss, "check_bss", ".bss wasn't mmap()-ed\n"))
|
||
|
|
goto cleanup;
|
||
|
|
|
||
|
|
kprobe_link = bpf_program__attach_kprobe(skel->progs.handle_kprobe,
|
||
|
|
false /* retprobe */,
|
||
|
|
SYS_NANOSLEEP_KPROBE_NAME);
|
||
|
|
if (!ASSERT_OK_PTR(kprobe_link, "attach_kprobe"))
|
||
|
|
goto cleanup;
|
||
|
|
skel->links.handle_kprobe = kprobe_link;
|
||
|
|
|
||
|
|
kretprobe_link = bpf_program__attach_kprobe(skel->progs.handle_kretprobe,
|
||
|
|
true /* retprobe */,
|
||
|
|
SYS_NANOSLEEP_KPROBE_NAME);
|
||
|
|
if (!ASSERT_OK_PTR(kretprobe_link, "attach_kretprobe"))
|
||
|
|
goto cleanup;
|
||
|
|
skel->links.handle_kretprobe = kretprobe_link;
|
||
|
|
|
||
|
|
ASSERT_EQ(uprobe_ref_ctr, 0, "uprobe_ref_ctr_before");
|
||
|
|
|
||
|
|
uprobe_opts.retprobe = false;
|
||
|
|
uprobe_opts.ref_ctr_offset = ref_ctr_offset;
|
||
|
|
uprobe_link = bpf_program__attach_uprobe_opts(skel->progs.handle_uprobe,
|
||
|
|
0 /* self pid */,
|
||
|
|
"/proc/self/exe",
|
||
|
|
uprobe_offset,
|
||
|
|
&uprobe_opts);
|
||
|
|
if (!ASSERT_OK_PTR(uprobe_link, "attach_uprobe"))
|
||
|
|
goto cleanup;
|
||
|
|
skel->links.handle_uprobe = uprobe_link;
|
||
|
|
|
||
|
|
ASSERT_GT(uprobe_ref_ctr, 0, "uprobe_ref_ctr_after");
|
||
|
|
|
||
|
|
/* if uprobe uses ref_ctr, uretprobe has to use ref_ctr as well */
|
||
|
|
uprobe_opts.retprobe = true;
|
||
|
|
uprobe_opts.ref_ctr_offset = ref_ctr_offset;
|
||
|
|
uretprobe_link = bpf_program__attach_uprobe_opts(skel->progs.handle_uretprobe,
|
||
|
|
-1 /* any pid */,
|
||
|
|
"/proc/self/exe",
|
||
|
|
uprobe_offset, &uprobe_opts);
|
||
|
|
if (!ASSERT_OK_PTR(uretprobe_link, "attach_uretprobe"))
|
||
|
|
goto cleanup;
|
||
|
|
skel->links.handle_uretprobe = uretprobe_link;
|
||
|
|
|
||
|
|
/* trigger & validate kprobe && kretprobe */
|
||
|
|
usleep(1);
|
||
|
|
|
||
|
|
if (CHECK(skel->bss->kprobe_res != 1, "check_kprobe_res",
|
||
|
|
"wrong kprobe res: %d\n", skel->bss->kprobe_res))
|
||
|
|
goto cleanup;
|
||
|
|
if (CHECK(skel->bss->kretprobe_res != 2, "check_kretprobe_res",
|
||
|
|
"wrong kretprobe res: %d\n", skel->bss->kretprobe_res))
|
||
|
|
goto cleanup;
|
||
|
|
|
||
|
|
/* trigger & validate uprobe & uretprobe */
|
||
|
|
get_base_addr();
|
||
|
|
|
||
|
|
if (CHECK(skel->bss->uprobe_res != 3, "check_uprobe_res",
|
||
|
|
"wrong uprobe res: %d\n", skel->bss->uprobe_res))
|
||
|
|
goto cleanup;
|
||
|
|
if (CHECK(skel->bss->uretprobe_res != 4, "check_uretprobe_res",
|
||
|
|
"wrong uretprobe res: %d\n", skel->bss->uretprobe_res))
|
||
|
|
goto cleanup;
|
||
|
|
|
||
|
|
cleanup:
|
||
|
|
test_attach_probe__destroy(skel);
|
||
|
|
ASSERT_EQ(uprobe_ref_ctr, 0, "uprobe_ref_ctr_cleanup");
|
||
|
|
}
|