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// SPDX-License-Identifier: GPL-2.0
#include <test_progs.h>
#include "stacktrace_ips.skel.h"
#ifdef __x86_64__
static int check_stacktrace_ips(int fd, __u32 key, int cnt, ...)
{
__u64 ips[PERF_MAX_STACK_DEPTH];
struct ksyms *ksyms = NULL;
int i, err = 0;
va_list args;
/* sorted by addr */
ksyms = load_kallsyms_local();
if (!ASSERT_OK_PTR(ksyms, "load_kallsyms_local"))
return -1;
/* unlikely, but... */
if (!ASSERT_LT(cnt, PERF_MAX_STACK_DEPTH, "check_max"))
return -1;
err = bpf_map_lookup_elem(fd, &key, ips);
if (err)
goto out;
/*
* Compare all symbols provided via arguments with stacktrace ips,
* and their related symbol addresses.t
*/
va_start(args, cnt);
for (i = 0; i < cnt; i++) {
unsigned long val;
struct ksym *ksym;
val = va_arg(args, unsigned long);
ksym = ksym_search_local(ksyms, ips[i]);
if (!ASSERT_OK_PTR(ksym, "ksym_search_local"))
break;
ASSERT_EQ(ksym->addr, val, "stack_cmp");
}
va_end(args);
out:
free_kallsyms_local(ksyms);
return err;
}
static void test_stacktrace_ips_kprobe_multi(bool retprobe)
{
LIBBPF_OPTS(bpf_kprobe_multi_opts, opts,
.retprobe = retprobe
);
LIBBPF_OPTS(bpf_test_run_opts, topts);
struct stacktrace_ips *skel;
skel = stacktrace_ips__open_and_load();
if (!ASSERT_OK_PTR(skel, "stacktrace_ips__open_and_load"))
return;
if (!skel->kconfig->CONFIG_UNWINDER_ORC) {
test__skip();
goto cleanup;
}
skel->links.kprobe_multi_test = bpf_program__attach_kprobe_multi_opts(
skel->progs.kprobe_multi_test,
"bpf_testmod_stacktrace_test", &opts);
if (!ASSERT_OK_PTR(skel->links.kprobe_multi_test, "bpf_program__attach_kprobe_multi_opts"))
goto cleanup;
trigger_module_test_read(1);
load_kallsyms();
check_stacktrace_ips(bpf_map__fd(skel->maps.stackmap), skel->bss->stack_key, 4,
ksym_get_addr("bpf_testmod_stacktrace_test_3"),
ksym_get_addr("bpf_testmod_stacktrace_test_2"),
ksym_get_addr("bpf_testmod_stacktrace_test_1"),
ksym_get_addr("bpf_testmod_test_read"));
cleanup:
stacktrace_ips__destroy(skel);
}
static void test_stacktrace_ips_raw_tp(void)
{
__u32 info_len = sizeof(struct bpf_prog_info);
LIBBPF_OPTS(bpf_test_run_opts, topts);
struct bpf_prog_info info = {};
struct stacktrace_ips *skel;
__u64 bpf_prog_ksym = 0;
int err;
skel = stacktrace_ips__open_and_load();
if (!ASSERT_OK_PTR(skel, "stacktrace_ips__open_and_load"))
return;
if (!skel->kconfig->CONFIG_UNWINDER_ORC) {
test__skip();
goto cleanup;
}
skel->links.rawtp_test = bpf_program__attach_raw_tracepoint(
skel->progs.rawtp_test,
"bpf_testmod_test_read");
if (!ASSERT_OK_PTR(skel->links.rawtp_test, "bpf_program__attach_raw_tracepoint"))
goto cleanup;
/* get bpf program address */
info.jited_ksyms = ptr_to_u64(&bpf_prog_ksym);
info.nr_jited_ksyms = 1;
err = bpf_prog_get_info_by_fd(bpf_program__fd(skel->progs.rawtp_test),
&info, &info_len);
if (!ASSERT_OK(err, "bpf_prog_get_info_by_fd"))
goto cleanup;
trigger_module_test_read(1);
load_kallsyms();
check_stacktrace_ips(bpf_map__fd(skel->maps.stackmap), skel->bss->stack_key, 2,
bpf_prog_ksym,
ksym_get_addr("bpf_trace_run2"));
cleanup:
stacktrace_ips__destroy(skel);
}
static void __test_stacktrace_ips(void)
{
if (test__start_subtest("kprobe_multi"))
test_stacktrace_ips_kprobe_multi(false);
if (test__start_subtest("kretprobe_multi"))
test_stacktrace_ips_kprobe_multi(true);
if (test__start_subtest("raw_tp"))
test_stacktrace_ips_raw_tp();
}
#else
static void __test_stacktrace_ips(void)
{
test__skip();
}
#endif
void test_stacktrace_ips(void)
{
__test_stacktrace_ips();
}
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