From 224e2c977b647d1ae72bf1d8e3424cd3e5e83f0c Mon Sep 17 00:00:00 2001 From: Andi Kleen Date: Fri, 7 Oct 2016 16:42:27 +0300 Subject: [PATCH] perf script: Support insn and insnlen When looking at Intel PT traces with perf script it is useful to have some indication of the instruction. Dump the instruction bytes and instruction length, which can be used for simple pattern analysis in scripts. % perf record -e intel_pt// foo % perf script --itrace=i0ns -F ip,insn,insnlen ffffffff8101232f ilen: 5 insn: 0f 1f 44 00 00 ffffffff81012334 ilen: 1 insn: 5b ffffffff81012335 ilen: 1 insn: 5d ffffffff81012336 ilen: 1 insn: c3 ffffffff810123e3 ilen: 1 insn: 5b ffffffff810123e4 ilen: 2 insn: 41 5c ffffffff810123e6 ilen: 1 insn: 5d ffffffff810123e7 ilen: 1 insn: c3 ffffffff810124a6 ilen: 2 insn: 31 c0 ffffffff810124a8 ilen: 9 insn: 41 83 bc 24 a8 01 00 00 01 ffffffff810124b1 ilen: 2 insn: 75 87 ... Signed-off-by: Andi Kleen Acked-by: Adrian Hunter Link: http://lkml.kernel.org/r/1475847747-30994-4-git-send-email-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/Documentation/perf-script.txt | 6 +++++- tools/perf/builtin-script.c | 24 ++++++++++++++++++++++-- 2 files changed, 27 insertions(+), 3 deletions(-) diff --git a/tools/perf/Documentation/perf-script.txt b/tools/perf/Documentation/perf-script.txt index 053bbbd84ece..c01904f388ce 100644 --- a/tools/perf/Documentation/perf-script.txt +++ b/tools/perf/Documentation/perf-script.txt @@ -117,7 +117,7 @@ OPTIONS 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, - callindent. Field list can be prepended with the type, trace, sw or hw, + callindent, insn, insnlen. Field list can be prepended with the type, trace, sw or hw, to indicate to which event type the field list applies. e.g., -F sw:comm,tid,time,ip,sym and -F trace:time,cpu,trace @@ -181,6 +181,10 @@ OPTIONS Instruction Trace decoding. For calls and returns, it will display the name of the symbol indented with spaces to reflect the stack depth. + When doing instruction trace decoding insn and insnlen give the + instruction bytes and the instruction length of the current + instruction. + Finally, a user may not set fields to none for all event types. i.e., -F "" is not allowed. diff --git a/tools/perf/builtin-script.c b/tools/perf/builtin-script.c index 7228d141a789..412fb6e65ac0 100644 --- a/tools/perf/builtin-script.c +++ b/tools/perf/builtin-script.c @@ -66,6 +66,8 @@ enum perf_output_field { PERF_OUTPUT_WEIGHT = 1U << 18, PERF_OUTPUT_BPF_OUTPUT = 1U << 19, PERF_OUTPUT_CALLINDENT = 1U << 20, + PERF_OUTPUT_INSN = 1U << 21, + PERF_OUTPUT_INSNLEN = 1U << 22, }; struct output_option { @@ -93,6 +95,8 @@ struct output_option { {.str = "weight", .field = PERF_OUTPUT_WEIGHT}, {.str = "bpf-output", .field = PERF_OUTPUT_BPF_OUTPUT}, {.str = "callindent", .field = PERF_OUTPUT_CALLINDENT}, + {.str = "insn", .field = PERF_OUTPUT_INSN}, + {.str = "insnlen", .field = PERF_OUTPUT_INSNLEN}, }; /* default set to maintain compatibility with current format */ @@ -624,6 +628,20 @@ static void print_sample_callindent(struct perf_sample *sample, printf("%*s", spacing - len, ""); } +static void print_insn(struct perf_sample *sample, + struct perf_event_attr *attr) +{ + if (PRINT_FIELD(INSNLEN)) + printf(" ilen: %d", sample->insn_len); + if (PRINT_FIELD(INSN)) { + int i; + + printf(" insn:"); + for (i = 0; i < sample->insn_len; i++) + printf(" %02x", (unsigned char)sample->insn[i]); + } +} + static void print_sample_bts(struct perf_sample *sample, struct perf_evsel *evsel, struct thread *thread, @@ -668,6 +686,8 @@ static void print_sample_bts(struct perf_sample *sample, if (print_srcline_last) map__fprintf_srcline(al->map, al->addr, "\n ", stdout); + print_insn(sample, attr); + printf("\n"); } @@ -911,7 +931,7 @@ static void process_event(struct perf_script *script, if (perf_evsel__is_bpf_output(evsel) && PRINT_FIELD(BPF_OUTPUT)) print_sample_bpf_output(sample); - + print_insn(sample, attr); printf("\n"); } @@ -2124,7 +2144,7 @@ int cmd_script(int argc, const char **argv, const char *prefix __maybe_unused) "Valid types: hw,sw,trace,raw. " "Fields: comm,tid,pid,time,cpu,event,trace,ip,sym,dso," "addr,symoff,period,iregs,brstack,brstacksym,flags," - "bpf-output,callindent", parse_output_fields), + "bpf-output,callindent,insn,insnlen", parse_output_fields), OPT_BOOLEAN('a', "all-cpus", &system_wide, "system-wide collection from all CPUs"), OPT_STRING('S', "symbols", &symbol_conf.sym_list_str, "symbol[,symbol...]", -- 2.20.1