| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-ID: <7f629f24-d98a-8a7d-e464-46b0237adf96@intel.com>
Date: Mon, 17 Apr 2023 08:40:37 +0300
From: Adrian Hunter <adrian.hunter@...el.com>
To: Changbin Du <changbin.du@...wei.com>
Cc: Mark Rutland <mark.rutland@....com>,
Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
Jiri Olsa <jolsa@...nel.org>,
Namhyung Kim <namhyung@...nel.org>,
Ian Rogers <irogers@...gle.com>,
linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org,
Hui Wang <hw.huiwang@...wei.com>,
Peter Zijlstra <peterz@...radead.org>,
Arnaldo Carvalho de Melo <acme@...nel.org>,
Ingo Molnar <mingo@...hat.com>
Subject: Re: [PATCH v4 2/2] perf: script: add new output field 'dsoff' to
print dso offset
On 14/04/23 06:25, 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@...+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@...+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@...wei.com>
Looks good, but patches do not apply to:
git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux.git perf-tools-next
Note the use of map__dso(map) now.
Also the repeated dso printing code:
printed += fprintf(fp, "(");
printed += map__fprintf_dsoname(map, fp);
if (PRINT_FIELD(DSOFF) && map && map__dso(map))
printed += fprintf(fp, "+0x%" PRIx64, alf.addr);
printed += fprintf(fp, ")");
is begging to be replaced by a helper function e.g.
if (PRINT_FIELD(DSO))
map__fprintf_dsoname_dsoff(map, PRINT_FIELD(DSOFF), addr, fp);
Perhaps another patch for that.
Also see comment further below.
> ---
> tools/perf/Documentation/perf-script.txt | 2 +-
> tools/perf/builtin-script.c | 25 +++++++++++++++++++++++-
> tools/perf/util/evsel_fprintf.c | 6 ++++++
> tools/perf/util/evsel_fprintf.h | 1 +
> 4 files changed, 32 insertions(+), 2 deletions(-)
>
> diff --git a/tools/perf/Documentation/perf-script.txt b/tools/perf/Documentation/perf-script.txt
> index 68e37de5fae4..20a1558c555f 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 69394ac0a20d..95dd6d650c21 100644
> --- a/tools/perf/builtin-script.c
> +++ b/tools/perf/builtin-script.c
> @@ -130,6 +130,7 @@ enum perf_output_field {
> PERF_OUTPUT_BRSTACKINSNLEN = 1ULL << 36,
> PERF_OUTPUT_MACHINE_PID = 1ULL << 37,
> PERF_OUTPUT_VCPU = 1ULL << 38,
> + PERF_OUTPUT_DSOFF = 1ULL << 39,
> };
>
> struct perf_script {
> @@ -171,6 +172,7 @@ 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},
> @@ -559,6 +561,9 @@ 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))
> + output[type].print_ip_opts |= EVSEL__PRINT_DSOFF;
> +
> if (PRINT_FIELD(SYMOFFSET))
> output[type].print_ip_opts |= EVSEL__PRINT_SYMOFFSET;
>
> @@ -612,6 +617,10 @@ static int perf_session__check_output_opt(struct perf_session *session)
> if (evsel == NULL)
> continue;
>
> + /* 'dsoff' implys 'dso' field */
> + if (output[j].fields & PERF_OUTPUT_DSOFF)
> + output[j].fields |= PERF_OUTPUT_DSO;
> +
> set_print_ip_opts(&evsel->core.attr);
> tod |= output[j].fields & PERF_OUTPUT_TOD;
> }
> @@ -916,6 +925,8 @@ static int perf_sample__fprintf_brstack(struct perf_sample *sample,
> if (PRINT_FIELD(DSO)) {
> printed += fprintf(fp, "(");
> printed += map__fprintf_dsoname(alf.map, fp);
> + if (PRINT_FIELD(DSOFF) && alf.map && alf.map->dso)
> + printed += fprintf(fp, "+0x%lx", alf.addr);
Here and elsewhere, addr is a u64 so you
need to use PRIx64 e.g.
printed += fprintf(fp, "+0x%" PRIx64, alf.addr);
> printed += fprintf(fp, ")");
> }
>
> @@ -923,6 +934,8 @@ static int perf_sample__fprintf_brstack(struct perf_sample *sample,
> if (PRINT_FIELD(DSO)) {
> printed += fprintf(fp, "(");
> printed += map__fprintf_dsoname(alt.map, fp);
> + if (PRINT_FIELD(DSOFF) && alt.map && alt.map->dso)
> + printed += fprintf(fp, "+0x%lx", alt.addr);
> printed += fprintf(fp, ")");
> }
>
> @@ -959,6 +972,8 @@ static int perf_sample__fprintf_brstacksym(struct perf_sample *sample,
> if (PRINT_FIELD(DSO)) {
> printed += fprintf(fp, "(");
> printed += map__fprintf_dsoname(alf.map, fp);
> + if (PRINT_FIELD(DSOFF) && alf.map && alf.map->dso)
> + printed += fprintf(fp, "+0x%lx", alf.addr);
> printed += fprintf(fp, ")");
> }
> printed += fprintf(fp, "%c", '/');
> @@ -966,6 +981,8 @@ static int perf_sample__fprintf_brstacksym(struct perf_sample *sample,
> if (PRINT_FIELD(DSO)) {
> printed += fprintf(fp, "(");
> printed += map__fprintf_dsoname(alt.map, fp);
> + if (PRINT_FIELD(DSOFF) && alt.map && alt.map->dso)
> + printed += fprintf(fp, "+0x%lx", alt.addr);
> printed += fprintf(fp, ")");
> }
> printed += print_bstack_flags(fp, entries + i);
> @@ -1006,12 +1023,16 @@ static int perf_sample__fprintf_brstackoff(struct perf_sample *sample,
> if (PRINT_FIELD(DSO)) {
> printed += fprintf(fp, "(");
> printed += map__fprintf_dsoname(alf.map, fp);
> + if (PRINT_FIELD(DSOFF) && alf.map && alf.map->dso)
> + printed += fprintf(fp, "+0x%lx", alf.addr);
> printed += fprintf(fp, ")");
> }
> printed += fprintf(fp, "/0x%"PRIx64, to);
> if (PRINT_FIELD(DSO)) {
> printed += fprintf(fp, "(");
> printed += map__fprintf_dsoname(alt.map, fp);
> + if (PRINT_FIELD(DSOFF) && alt.map && alt.map->dso)
> + printed += fprintf(fp, "+0x%lx", alt.addr);
> printed += fprintf(fp, ")");
> }
> printed += print_bstack_flags(fp, entries + i);
> @@ -1378,6 +1399,8 @@ static int perf_sample__fprintf_addr(struct perf_sample *sample,
> if (PRINT_FIELD(DSO)) {
> printed += fprintf(fp, " (");
> printed += map__fprintf_dsoname(al.map, fp);
> + if (PRINT_FIELD(DSOFF) && al.map && al.map->dso)
> + printed += fprintf(fp, "+0x%lx", al.addr);
> printed += fprintf(fp, ")");
> }
> out:
> @@ -3851,7 +3874,7 @@ 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);
> 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;
Powered by blists - more mailing lists