perf test: Add callchain order setup for DWARF unwinder test
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>
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@ -51,6 +51,12 @@ static int unwind_entry(struct unwind_entry *entry, void *arg)
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"krava_1",
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"test__dwarf_unwind"
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};
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/*
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* The funcs[MAX_STACK] array index, based on the
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* callchain order setup.
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*/
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int idx = callchain_param.order == ORDER_CALLER ?
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MAX_STACK - *cnt - 1 : *cnt;
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if (*cnt >= MAX_STACK) {
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pr_debug("failed: crossed the max stack value %d\n", MAX_STACK);
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@ -63,8 +69,10 @@ static int unwind_entry(struct unwind_entry *entry, void *arg)
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return -1;
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}
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pr_debug("got: %s 0x%" PRIx64 "\n", symbol, entry->ip);
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return strcmp((const char *) symbol, funcs[(*cnt)++]);
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(*cnt)++;
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pr_debug("got: %s 0x%" PRIx64 ", expecting %s\n",
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symbol, entry->ip, funcs[idx]);
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return strcmp((const char *) symbol, funcs[idx]);
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}
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__attribute__ ((noinline))
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@ -105,8 +113,16 @@ static int compare(void *p1, void *p2)
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/* Any possible value should be 'thread' */
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struct thread *thread = *(struct thread **)p1;
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if (global_unwind_retval == -INT_MAX)
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if (global_unwind_retval == -INT_MAX) {
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/* Call unwinder twice for both callchain orders. */
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callchain_param.order = ORDER_CALLER;
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global_unwind_retval = unwind_thread(thread);
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if (!global_unwind_retval) {
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callchain_param.order = ORDER_CALLEE;
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global_unwind_retval = unwind_thread(thread);
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}
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}
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return p1 - p2;
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}
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