Re: [PATCH 2/2] perf, tools: Support user regs in perf script

[Arnaldo Carvalho de Melo <acme@kernel.org>]

Em Tue, Sep 05, 2017 at 10:00:29AM -0700, Andi Kleen escreveu:
> From: Andi Kleen <ak@linux.intel.com>
> 
> Teach perf script to print user regs.
> 
> % perf record --user-regs=ip,sp ...
> % perf script -F ip,sym,uregs

Applied the first patch, but this one isn't applying, please check.

Last changes here on builtin-script.c:

[acme@jouet linux]$ git log --oneline -10 tools/perf/builtin-script.c
49d58f04eb6c perf script: Support physical address
2ec5cab604b2 perf script: Remove some bogus error handling
e9def1b2e74e perf tools: Add feature header record to pipe-mode
114f709e01e6 perf tool: Add show_feature_header to perf_tool
644e0840ad46 (tag: perf-core-for-mingo-4.13-20170630) perf auxtrace: Add CPU filter support
65c5e18f9df0 perf script: Add synthesized Intel PT power and ptwrite events
47e780848e62 perf script: Add 'synth' field for synthesized event payloads
1405720d4f26 perf script: Add 'synth' event type for synthesized events
701516ae3dec (tag: perf-core-for-mingo-4.13-20170621) perf script: Fix message because field list option is -F not -f
106dacd86f04 perf script: Support -F brstackoff,dso
[acme@jouet linux]$

>  ffffffff9e060c24 native_write_msr ABI:2    SP:0x7ffd0ea06c38    IP:0x7fe77f55b637
>  ffffffff9e060c24 native_write_msr ABI:2    SP:0x7ffd0ea06c38    IP:0x7fe77f55b637
>  ffffffff9e060c24 native_write_msr ABI:2    SP:0x7ffd0ea06c38    IP:0x7fe77f55b637
>  ffffffff9e060c24 native_write_msr ABI:2    SP:0x7ffd0ea06c38    IP:0x7fe77f55b637
>  ffffffff9e00cc12 intel_pmu_handle_irq ABI:2    SP:0x7ffd0ea06c38    IP:0x7fe77f55b637
> 
> Signed-off-by: Andi Kleen <ak@linux.intel.com>
> ---
>  tools/perf/Documentation/perf-script.txt |  2 +-
>  tools/perf/builtin-script.c              | 30 +++++++++++++++++++++++++++++-
>  2 files changed, 30 insertions(+), 2 deletions(-)
> 
> diff --git a/tools/perf/Documentation/perf-script.txt b/tools/perf/Documentation/perf-script.txt
> index 5ee8796be96e..d816c62379ee 100644
> --- a/tools/perf/Documentation/perf-script.txt
> +++ b/tools/perf/Documentation/perf-script.txt
> @@ -116,7 +116,7 @@ OPTIONS
>  --fields::
>          Comma separated list of fields to print. Options are:
>          comm, tid, pid, time, cpu, event, trace, ip, sym, dso, addr, symoff,
> -        srcline, period, iregs, brstack, brstacksym, flags, bpf-output, brstackinsn, brstackoff,
> +        srcline, period, iregs, uregs, brstack, brstacksym, flags, bpf-output, brstackinsn, brstackoff,
>          callindent, insn, insnlen, synth.
>          Field list can be prepended with the type, trace, sw or hw,
>          to indicate to which event type the field list applies.
> diff --git a/tools/perf/builtin-script.c b/tools/perf/builtin-script.c
> index 378f76cdf923..dff7d0566487 100644
> --- a/tools/perf/builtin-script.c
> +++ b/tools/perf/builtin-script.c
> @@ -87,6 +87,7 @@ enum perf_output_field {
>  	PERF_OUTPUT_BRSTACKINSN	    = 1U << 23,
>  	PERF_OUTPUT_BRSTACKOFF	    = 1U << 24,
>  	PERF_OUTPUT_SYNTH           = 1U << 25,
> +	PERF_OUTPUT_UREGS	    = 1U << 26,
>  };
>  
>  struct output_option {
> @@ -108,6 +109,7 @@ struct output_option {
>  	{.str = "srcline", .field = PERF_OUTPUT_SRCLINE},
>  	{.str = "period", .field = PERF_OUTPUT_PERIOD},
>  	{.str = "iregs", .field = PERF_OUTPUT_IREGS},
> +	{.str = "uregs", .field = PERF_OUTPUT_UREGS},
>  	{.str = "brstack", .field = PERF_OUTPUT_BRSTACK},
>  	{.str = "brstacksym", .field = PERF_OUTPUT_BRSTACKSYM},
>  	{.str = "data_src", .field = PERF_OUTPUT_DATA_SRC},
> @@ -382,6 +384,11 @@ static int perf_evsel__check_attr(struct perf_evsel *evsel,
>  					PERF_OUTPUT_IREGS))
>  		return -EINVAL;
>  
> +	if (PRINT_FIELD(UREGS) &&
> +		perf_evsel__check_stype(evsel, PERF_SAMPLE_REGS_USER, "UREGS",
> +					PERF_OUTPUT_UREGS))
> +		return -EINVAL;
> +
>  	return 0;
>  }
>  
> @@ -501,6 +508,24 @@ static void print_sample_iregs(struct perf_sample *sample,
>  	}
>  }
>  
> +static void print_sample_uregs(struct perf_sample *sample,
> +			  struct perf_event_attr *attr)
> +{
> +	struct regs_dump *regs = &sample->user_regs;
> +	uint64_t mask = attr->sample_regs_user;
> +	unsigned i = 0, r;
> +
> +	if (!regs || !regs->regs)
> +		return;
> +
> +	printf(" ABI:%lu ", regs->abi);
> +
> +	for_each_set_bit(r, (unsigned long *) &mask, sizeof(mask) * 8) {
> +		u64 val = regs->regs[i++];
> +		printf("%5s:0x%"PRIx64" ", perf_reg_name(r), val);
> +	}
> +}
> +
>  static void print_sample_start(struct perf_sample *sample,
>  			       struct thread *thread,
>  			       struct perf_evsel *evsel)
> @@ -1436,6 +1461,9 @@ static void process_event(struct perf_script *script,
>  	if (PRINT_FIELD(IREGS))
>  		print_sample_iregs(sample, attr);
>  
> +	if (PRINT_FIELD(UREGS))
> +		print_sample_uregs(sample, attr);
> +
>  	if (PRINT_FIELD(BRSTACK))
>  		print_sample_brstack(sample, thread, attr);
>  	else if (PRINT_FIELD(BRSTACKSYM))
> @@ -2728,7 +2756,7 @@ int cmd_script(int argc, const char **argv)
>  		     "+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,"
> -		     "addr,symoff,period,iregs,brstack,brstacksym,flags,"
> +		     "addr,symoff,period,iregs,uregs,brstack,brstacksym,flags,"
>  		     "bpf-output,callindent,insn,insnlen,brstackinsn,synth",
>  		     parse_output_fields),
>  	OPT_BOOLEAN('a', "all-cpus", &system_wide,
> -- 
> 2.9.5