linux-kernel - Re: [PATCH 06/32] perf tools: Enable passing bpf object file to --event

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Date:	Sat, 29 Aug 2015 08:50:46 +0800
From:	"Wangnan (F)" <wangnan0@...wei.com>
To:	<acme@...hat.com>, <ast@...mgrid.com>
CC:	<brendan.d.gregg@...il.com>, <daniel@...earbox.net>,
	<dsahern@...il.com>, <hekuang@...wei.com>, <jolsa@...nel.org>,
	<xiakaixu@...wei.com>, <masami.hiramatsu.pt@...achi.com>,
	<namhyung@...nel.org>, <a.p.zijlstra@...llo.nl>,
	<lizefan@...wei.com>, <pi3orama@....com>,
	<linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 06/32] perf tools: Enable passing bpf object file to --event



On 2015/8/28 15:05, Wang Nan wrote:
> diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
> index ef5fde6..24c8b63 100644
> --- a/tools/perf/builtin-trace.c
> +++ b/tools/perf/builtin-trace.c
> @@ -3090,6 +3090,7 @@ int cmd_trace(int argc, const char **argv, const char *prefix __maybe_unused)
>   	if (trace.evlist->nr_entries > 0)
>   		evlist__set_evsel_handler(trace.evlist, trace__event_handler);
>   
> +	/* trace__record calls cmd_record, which calls bpf__clear() */
>   	if ((argc >= 1) && (strcmp(argv[0], "record") == 0))
>   		return trace__record(&trace, argc-1, &argv[1]);
>   
> @@ -3100,7 +3101,8 @@ int cmd_trace(int argc, const char **argv, const char *prefix __maybe_unused)
>   	if (!trace.trace_syscalls && !trace.trace_pgfaults &&
>   	    trace.evlist->nr_entries == 0 /* Was --events used? */) {
>   		pr_err("Please specify something to trace.\n");
> -		return -1;
> +		err = -1;
> +		goto out;
>   	}
>   
>   	if (output_name != NULL) {
> @@ -3159,5 +3161,6 @@ out_close:
>   	if (output_name != NULL)
>   		fclose(trace.output);
>   out:
> +	bpf__clear();
>   	return err;
>   }
>

Sorry, here is a silly mistake that I miss

#include "bpf-loader.h"

at the head of builtin-trace.c. In my default environment 
builtin-trace.c is not compiled
so I find this problem today when I compile it on another machine. I'll 
fix in my tree.

Arnaldo, since you suggest Ingo to pull directly, shall I make another pull request with the whole 32 patches
sent for fixing that line?

Thank you.



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