a074865e60
Perf hooks allow hooking user code at perf events. They can be used for manipulation of BPF maps, taking snapshot and reporting results. In this patch two perf hook points are introduced: record_start and record_end. To avoid buggy user actions, a SIGSEGV signal handler is introduced into 'perf record'. It turns off perf hook if it causes a segfault and report an error to help debugging. A test case for perf hook is introduced. Test result: $ ./buildperf/perf test -v hook 50: Test perf hooks : --- start --- test child forked, pid 10311 SIGSEGV is observed as expected, try to recover. Fatal error (SEGFAULT) in perf hook 'test' test child finished with 0 ---- end ---- Test perf hooks: Ok Signed-off-by: Wang Nan <wangnan0@huawei.com> Cc: Alexei Starovoitov <ast@fb.com> Cc: He Kuang <hekuang@huawei.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Joe Stringer <joe@ovn.org> Cc: Zefan Li <lizefan@huawei.com> Cc: pi3orama@163.com Link: http://lkml.kernel.org/r/20161126070354.141764-5-wangnan0@huawei.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
104 lines
3.1 KiB
C
104 lines
3.1 KiB
C
#ifndef TESTS_H
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#define TESTS_H
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#include <stdbool.h>
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#define TEST_ASSERT_VAL(text, cond) \
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do { \
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if (!(cond)) { \
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pr_debug("FAILED %s:%d %s\n", __FILE__, __LINE__, text); \
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return -1; \
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} \
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} while (0)
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#define TEST_ASSERT_EQUAL(text, val, expected) \
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do { \
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if (val != expected) { \
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pr_debug("FAILED %s:%d %s (%d != %d)\n", \
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__FILE__, __LINE__, text, val, expected); \
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return -1; \
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} \
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} while (0)
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enum {
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TEST_OK = 0,
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TEST_FAIL = -1,
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TEST_SKIP = -2,
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};
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struct test {
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const char *desc;
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int (*func)(int subtest);
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struct {
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bool skip_if_fail;
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int (*get_nr)(void);
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const char *(*get_desc)(int subtest);
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} subtest;
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};
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/* Tests */
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int test__vmlinux_matches_kallsyms(int subtest);
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int test__openat_syscall_event(int subtest);
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int test__openat_syscall_event_on_all_cpus(int subtest);
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int test__basic_mmap(int subtest);
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int test__PERF_RECORD(int subtest);
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int test__perf_evsel__roundtrip_name_test(int subtest);
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int test__perf_evsel__tp_sched_test(int subtest);
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int test__syscall_openat_tp_fields(int subtest);
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int test__pmu(int subtest);
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int test__attr(int subtest);
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int test__dso_data(int subtest);
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int test__dso_data_cache(int subtest);
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int test__dso_data_reopen(int subtest);
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int test__parse_events(int subtest);
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int test__hists_link(int subtest);
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int test__python_use(int subtest);
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int test__bp_signal(int subtest);
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int test__bp_signal_overflow(int subtest);
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int test__task_exit(int subtest);
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int test__sw_clock_freq(int subtest);
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int test__code_reading(int subtest);
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int test__sample_parsing(int subtest);
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int test__keep_tracking(int subtest);
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int test__parse_no_sample_id_all(int subtest);
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int test__dwarf_unwind(int subtest);
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int test__hists_filter(int subtest);
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int test__mmap_thread_lookup(int subtest);
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int test__thread_mg_share(int subtest);
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int test__hists_output(int subtest);
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int test__hists_cumulate(int subtest);
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int test__switch_tracking(int subtest);
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int test__fdarray__filter(int subtest);
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int test__fdarray__add(int subtest);
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int test__kmod_path__parse(int subtest);
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int test__thread_map(int subtest);
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int test__llvm(int subtest);
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const char *test__llvm_subtest_get_desc(int subtest);
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int test__llvm_subtest_get_nr(void);
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int test__bpf(int subtest);
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const char *test__bpf_subtest_get_desc(int subtest);
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int test__bpf_subtest_get_nr(void);
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int test_session_topology(int subtest);
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int test__thread_map_synthesize(int subtest);
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int test__cpu_map_synthesize(int subtest);
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int test__synthesize_stat_config(int subtest);
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int test__synthesize_stat(int subtest);
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int test__synthesize_stat_round(int subtest);
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int test__event_update(int subtest);
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int test__event_times(int subtest);
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int test__backward_ring_buffer(int subtest);
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int test__cpu_map_print(int subtest);
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int test__sdt_event(int subtest);
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int test__is_printable_array(int subtest);
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int test__bitmap_print(int subtest);
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int test__perf_hooks(int subtest);
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#if defined(__arm__) || defined(__aarch64__)
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#ifdef HAVE_DWARF_UNWIND_SUPPORT
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struct thread;
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struct perf_sample;
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int test__arch_unwind_sample(struct perf_sample *sample,
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struct thread *thread);
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#endif
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#endif
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#endif /* TESTS_H */
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