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perf test: Add callchain order setup for DWARF unwinder test

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Adding callchain order setup for DWARF unwinder test. The test now runs
unwinder for both callee and caller orders.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Tested-by: Milian Wolff <milian.wolff@kdab.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/r/1447772739-18471-4-git-send-email-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Jiri Olsa 2015-11-17 16:05:39 +01:00 committed by Arnaldo Carvalho de Melo
parent cb1dc22dce
commit 8dc0564d80
1 changed files with 19 additions and 3 deletions
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22
tools/perf/tests/dwarf-unwind.c
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@ -51,6 +51,12 @@ static int unwind_entry(struct unwind_entry *entry, void *arg)
"krava_1",
"test__dwarf_unwind"
};
/*
* The funcs[MAX_STACK] array index, based on the
* callchain order setup.
*/
int idx = callchain_param.order == ORDER_CALLER ?
MAX_STACK - *cnt - 1 : *cnt;
if (*cnt >= MAX_STACK) {
pr_debug("failed: crossed the max stack value %d\n", MAX_STACK);
@ -63,8 +69,10 @@ static int unwind_entry(struct unwind_entry *entry, void *arg)
return -1;
}
pr_debug("got: %s 0x%" PRIx64 "\n", symbol, entry->ip);
return strcmp((const char *) symbol, funcs[(*cnt)++]);
(*cnt)++;
pr_debug("got: %s 0x%" PRIx64 ", expecting %s\n",
symbol, entry->ip, funcs[idx]);
return strcmp((const char *) symbol, funcs[idx]);
}
__attribute__ ((noinline))
@ -105,8 +113,16 @@ static int compare(void *p1, void *p2)
/* Any possible value should be 'thread' */
struct thread *thread = *(struct thread **)p1;
if (global_unwind_retval == -INT_MAX)
if (global_unwind_retval == -INT_MAX) {
/* Call unwinder twice for both callchain orders. */
callchain_param.order = ORDER_CALLER;
global_unwind_retval = unwind_thread(thread);
if (!global_unwind_retval) {
callchain_param.order = ORDER_CALLEE;
global_unwind_retval = unwind_thread(thread);
}
}
return p1 - p2;
}