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perf tools: Pass context to perf hook functions

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Pass a pointer to perf hook functions so they receive context
information during setup.

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/20161126070354.141764-6-wangnan0@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Wang Nan
2016-11-26 07:03:29 +00:00
committed by Arnaldo Carvalho de Melo
parent baa1973ebc
commit 8ad85e9e6f
3 changed files with 20 additions and 10 deletions
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14
tools/perf/tests/perf-hooks.c
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@@ -15,13 +15,13 @@ static void sigsegv_handler(int sig __maybe_unused)
exit(-1);
}
static int hook_flags;
static void the_hook(void)
static void the_hook(void *_hook_flags)
{
int *hook_flags = _hook_flags;
int *p = NULL;
hook_flags = 1234;
*hook_flags = 1234;
/* Generate a segfault, test perf_hooks__recover */
*p = 0;
@@ -29,13 +29,17 @@ static void the_hook(void)
int test__perf_hooks(int subtest __maybe_unused)
{
int hook_flags = 0;
signal(SIGSEGV, sigsegv_handler);
perf_hooks__set_hook("test", the_hook);
perf_hooks__set_hook("test", the_hook, &hook_flags);
perf_hooks__invoke_test();
/* hook is triggered? */
if (hook_flags != 1234)
if (hook_flags != 1234) {
pr_debug("Setting failed: %d (%p)\n", hook_flags, &hook_flags);
return TEST_FAIL;
}
/* the buggy hook is removed? */
if (perf_hooks__get_hook("test"))