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Message-ID: <696dd16a-bd1a-1a55-4024-57c8bc899c31@intel.com>
Date:   Tue, 11 Apr 2023 12:15:53 +0300
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Subject: Re: [PATCH v3 2/2] perf: script: add new output field 'dsoff' to
 print dso offset
Content-Language: en-US
To:     Changbin Du <changbin.du@huawei.com>
Cc:     Mark Rutland <mark.rutland@arm.com>,
        Alexander Shishkin <alexander.shishkin@linux.intel.com>,
        Jiri Olsa <jolsa@kernel.org>,
        Namhyung Kim <namhyung@kernel.org>,
        Ian Rogers <irogers@google.com>,
        linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org,
        Hui Wang <hw.huiwang@huawei.com>,
        Peter Zijlstra <peterz@infradead.org>,
        Arnaldo Carvalho de Melo <acme@kernel.org>,
        Ingo Molnar <mingo@redhat.com>
References: <20230410070858.4051548-1-changbin.du@huawei.com>
 <20230410070858.4051548-3-changbin.du@huawei.com>
From:   Adrian Hunter <adrian.hunter@intel.com>
Organization: Intel Finland Oy, Registered Address: PL 281, 00181 Helsinki,
 Business Identity Code: 0357606 - 4, Domiciled in Helsinki
In-Reply-To: <20230410070858.4051548-3-changbin.du@huawei.com>
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On 10/04/23 10:08, Changbin Du wrote:
> This adds a new 'dsoff' field to print dso offset for resolved symbols,
> and the offset is appended to dso name.
> 
> Default output:
> $ perf script
>        ls 2695501 3011030.487017:     500000 cycles:      152cc73ef4b5 get_common_indices.constprop.0+0x155 (/usr/lib/x86_64-linux-gnu/ld-2.31.so)
>        ls 2695501 3011030.487018:     500000 cycles:  ffffffff99045b3e [unknown] ([unknown])
>        ls 2695501 3011030.487018:     500000 cycles:  ffffffff9968e107 [unknown] ([unknown])
>        ls 2695501 3011030.487018:     500000 cycles:  ffffffffc1f54afb [unknown] ([unknown])
>        ls 2695501 3011030.487018:     500000 cycles:  ffffffff9968382f [unknown] ([unknown])
>        ls 2695501 3011030.487019:     500000 cycles:  ffffffff99e00094 [unknown] ([unknown])
>        ls 2695501 3011030.487019:     500000 cycles:      152cc718a8d0 __errno_location@plt+0x0 (/usr/lib/x86_64-linux-gnu/libselinux.so.1)
> 
> Display 'dsoff' field:
> $ perf script -F +dsoff
>        ls 2695501 3011030.487017:     500000 cycles:      152cc73ef4b5 get_common_indices.constprop.0+0x155 (/usr/lib/x86_64-linux-gnu/ld-2.31.so+0x1c4b5)
>        ls 2695501 3011030.487018:     500000 cycles:  ffffffff99045b3e [unknown] ([unknown])
>        ls 2695501 3011030.487018:     500000 cycles:  ffffffff9968e107 [unknown] ([unknown])
>        ls 2695501 3011030.487018:     500000 cycles:  ffffffffc1f54afb [unknown] ([unknown])
>        ls 2695501 3011030.487018:     500000 cycles:  ffffffff9968382f [unknown] ([unknown])
>        ls 2695501 3011030.487019:     500000 cycles:  ffffffff99e00094 [unknown] ([unknown])
>        ls 2695501 3011030.487019:     500000 cycles:      152cc718a8d0 __errno_location@plt+0x0 (/usr/lib/x86_64-linux-gnu/libselinux.so.1+0x68d0)
>        ls 2695501 3011030.487019:     500000 cycles:  ffffffff992a6db0 [unknown] ([unknown])
> 
> Signed-off-by: Changbin Du <changbin.du@huawei.com>
> ---
>  tools/perf/Documentation/perf-script.txt | 2 +-
>  tools/perf/builtin-script.c              | 9 ++++++++-
>  tools/perf/util/evsel_fprintf.c          | 6 ++++++
>  tools/perf/util/evsel_fprintf.h          | 1 +
>  4 files changed, 16 insertions(+), 2 deletions(-)
> 
> diff --git a/tools/perf/Documentation/perf-script.txt b/tools/perf/Documentation/perf-script.txt
> index 777a0d8ba7d1..ff9a52e44688 100644
> --- a/tools/perf/Documentation/perf-script.txt
> +++ b/tools/perf/Documentation/perf-script.txt
> @@ -130,7 +130,7 @@ OPTIONS
>  -F::
>  --fields::
>          Comma separated list of fields to print. Options are:
> -        comm, tid, pid, time, cpu, event, trace, ip, sym, dso, addr, symoff,
> +        comm, tid, pid, time, cpu, event, trace, ip, sym, dso, dsoff, addr, symoff,
>          srcline, period, iregs, uregs, brstack, brstacksym, flags, bpf-output,
>          brstackinsn, brstackinsnlen, brstackoff, callindent, insn, insnlen, synth,
>          phys_addr, metric, misc, srccode, ipc, data_page_size, code_page_size, ins_lat,
> diff --git a/tools/perf/builtin-script.c b/tools/perf/builtin-script.c
> index a792214d1af8..bdc5de94cf43 100644
> --- a/tools/perf/builtin-script.c
> +++ b/tools/perf/builtin-script.c
> @@ -133,6 +133,7 @@ enum perf_output_field {
>  	PERF_OUTPUT_VCPU            = 1ULL << 38,
>  	PERF_OUTPUT_CGROUP          = 1ULL << 39,
>  	PERF_OUTPUT_RETIRE_LAT      = 1ULL << 40,
> +	PERF_OUTPUT_DSOFF           = 1ULL << 41,
>  };
>  
>  struct perf_script {
> @@ -174,6 +175,7 @@ struct output_option {
>  	{.str = "ip",    .field = PERF_OUTPUT_IP},
>  	{.str = "sym",   .field = PERF_OUTPUT_SYM},
>  	{.str = "dso",   .field = PERF_OUTPUT_DSO},
> +	{.str = "dsoff", .field = PERF_OUTPUT_DSOFF},
>  	{.str = "addr",  .field = PERF_OUTPUT_ADDR},
>  	{.str = "symoff", .field = PERF_OUTPUT_SYMOFFSET},
>  	{.str = "srcline", .field = PERF_OUTPUT_SRCLINE},
> @@ -574,6 +576,11 @@ static void set_print_ip_opts(struct perf_event_attr *attr)
>  	if (PRINT_FIELD(DSO))
>  		output[type].print_ip_opts |= EVSEL__PRINT_DSO;
>  
> +	if (PRINT_FIELD(DSOFF)) {
> +		/* 'dsoff' implys 'dso' field for printing */
> +		output[type].print_ip_opts |= EVSEL__PRINT_DSO | EVSEL__PRINT_DSOFF;
> +	}
> +
>  	if (PRINT_FIELD(SYMOFFSET))
>  		output[type].print_ip_opts |= EVSEL__PRINT_SYMOFFSET;
>  
> @@ -3881,7 +3888,7 @@ int cmd_script(int argc, const char **argv)
>  		     "comma separated output fields prepend with 'type:'. "
>  		     "+field to add and -field to remove."
>  		     "Valid types: hw,sw,trace,raw,synth. "
> -		     "Fields: comm,tid,pid,time,cpu,event,trace,ip,sym,dso,"
> +		     "Fields: comm,tid,pid,time,cpu,event,trace,ip,sym,dso,dsoff"
>  		     "addr,symoff,srcline,period,iregs,uregs,brstack,"
>  		     "brstacksym,flags,data_src,weight,bpf-output,brstackinsn,"
>  		     "brstackinsnlen,brstackoff,callindent,insn,insnlen,synth,"
> diff --git a/tools/perf/util/evsel_fprintf.c b/tools/perf/util/evsel_fprintf.c
> index 1fb8044d402e..ae8333772c76 100644
> --- a/tools/perf/util/evsel_fprintf.c
> +++ b/tools/perf/util/evsel_fprintf.c
> @@ -116,6 +116,7 @@ int sample__fprintf_callchain(struct perf_sample *sample, int left_alignment,
>  	int print_ip = print_opts & EVSEL__PRINT_IP;
>  	int print_sym = print_opts & EVSEL__PRINT_SYM;
>  	int print_dso = print_opts & EVSEL__PRINT_DSO;
> +	int print_dsoff = print_opts & EVSEL__PRINT_DSOFF;
>  	int print_symoffset = print_opts & EVSEL__PRINT_SYMOFFSET;
>  	int print_oneline = print_opts & EVSEL__PRINT_ONELINE;
>  	int print_srcline = print_opts & EVSEL__PRINT_SRCLINE;
> @@ -174,6 +175,8 @@ int sample__fprintf_callchain(struct perf_sample *sample, int left_alignment,
>  			if (print_dso && (!sym || !sym->inlined)) {
>  				printed += fprintf(fp, " (");
>  				printed += map__fprintf_dsoname(map, fp);
> +				if (print_dsoff && map && map->dso)
> +					printed += fprintf(fp, "+0x%lx", addr);
>  				printed += fprintf(fp, ")");
>  			}
>  
> @@ -209,6 +212,7 @@ int sample__fprintf_sym(struct perf_sample *sample, struct addr_location *al,
>  	int print_ip = print_opts & EVSEL__PRINT_IP;
>  	int print_sym = print_opts & EVSEL__PRINT_SYM;
>  	int print_dso = print_opts & EVSEL__PRINT_DSO;
> +	int print_dsoff = print_opts & EVSEL__PRINT_DSOFF;
>  	int print_symoffset = print_opts & EVSEL__PRINT_SYMOFFSET;
>  	int print_srcline = print_opts & EVSEL__PRINT_SRCLINE;
>  	int print_unknown_as_addr = print_opts & EVSEL__PRINT_UNKNOWN_AS_ADDR;
> @@ -237,6 +241,8 @@ int sample__fprintf_sym(struct perf_sample *sample, struct addr_location *al,
>  		if (print_dso) {
>  			printed += fprintf(fp, " (");
>  			printed += map__fprintf_dsoname(al->map, fp);
> +			if (print_dsoff && al->map && al->map->dso)
> +				printed += fprintf(fp, "+0x%lx", al->addr);

There are a lot of map__fprintf_dsoname() callers that should
also support "dsoff".  In fact, probably all of them except
perf_sample__fprintf_callindent().

>  			printed += fprintf(fp, ")");
>  		}
>  
> diff --git a/tools/perf/util/evsel_fprintf.h b/tools/perf/util/evsel_fprintf.h
> index 3093d096c29f..c8a9fac2f2dd 100644
> --- a/tools/perf/util/evsel_fprintf.h
> +++ b/tools/perf/util/evsel_fprintf.h
> @@ -26,6 +26,7 @@ int evsel__fprintf(struct evsel *evsel, struct perf_attr_details *details, FILE
>  #define EVSEL__PRINT_UNKNOWN_AS_ADDR	(1<<6)
>  #define EVSEL__PRINT_CALLCHAIN_ARROW	(1<<7)
>  #define EVSEL__PRINT_SKIP_IGNORED	(1<<8)
> +#define EVSEL__PRINT_DSOFF		(1<<9)
>  
>  struct addr_location;
>  struct perf_event_attr;