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Date: Fri, 22 Feb 2019 13:05:54 -0300
From: Arnaldo Carvalho de Melo <arnaldo.melo@...il.com>
To: Jiri Olsa <jolsa@...nel.org>
Cc: lkml <linux-kernel@...r.kernel.org>,
Ingo Molnar <mingo@...nel.org>,
Namhyung Kim <namhyung@...nel.org>,
Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
Peter Zijlstra <a.p.zijlstra@...llo.nl>,
Adrian Hunter <adrian.hunter@...el.com>,
Andi Kleen <ak@...ux.intel.com>,
Stephane Eranian <eranian@...gle.com>,
Alexey Budankov <alexey.budankov@...ux.intel.com>
Subject: Re: [PATCH 02/17] perf data: Add global path holder
Em Thu, Feb 21, 2019 at 10:41:30AM +0100, Jiri Olsa escreveu:
> Adding path to the struct perf_data. It will keep the
> configured path for the data (const char*). The path
> in struct perf_data_file is now dynamically allocated
> (duped) from it.
>
> This scheme is useful/used in following patches where
> struct perf_data::path holds the 'configure' directory
> path and struct perf_data_file::path holds the allocated
> path for specific files.
CC /tmp/build/perf/util/jitdump.o
util/data-convert-bt.c: In function ‘bt_convert__perf2ctf’:
util/data-convert-bt.c:1581:26: error: initialization discards ‘const’ qualifier from pointer target type [-Werror=discarded-qualifiers]
.file = { .path = input, .fd = -1 },
^~~~~
cc1: all warnings being treated as errors
Trying to fix now
> Also it actually makes the code little simpler.
>
> Link: http://lkml.kernel.org/n/tip-ww4tdzfaub4vlv9xxkxvwx9q@git.kernel.org
> Signed-off-by: Jiri Olsa <jolsa@...nel.org>
> ---
> tools/perf/builtin-annotate.c | 4 +--
> tools/perf/builtin-buildid-cache.c | 4 +--
> tools/perf/builtin-buildid-list.c | 8 +++---
> tools/perf/builtin-c2c.c | 4 +--
> tools/perf/builtin-diff.c | 12 ++++-----
> tools/perf/builtin-evlist.c | 4 +--
> tools/perf/builtin-inject.c | 10 +++-----
> tools/perf/builtin-kmem.c | 2 +-
> tools/perf/builtin-kvm.c | 8 +++---
> tools/perf/builtin-lock.c | 8 +++---
> tools/perf/builtin-mem.c | 8 +++---
> tools/perf/builtin-record.c | 6 ++---
> tools/perf/builtin-report.c | 6 ++---
> tools/perf/builtin-sched.c | 16 +++++-------
> tools/perf/builtin-script.c | 12 ++++-----
> tools/perf/builtin-stat.c | 6 ++---
> tools/perf/builtin-timechart.c | 8 +++---
> tools/perf/builtin-trace.c | 8 +++---
> tools/perf/util/data-convert-bt.c | 2 +-
> tools/perf/util/data.c | 39 +++++++++++++++++++++---------
> tools/perf/util/data.h | 3 ++-
> 21 files changed, 86 insertions(+), 92 deletions(-)
>
> diff --git a/tools/perf/builtin-annotate.c b/tools/perf/builtin-annotate.c
> index 7f3c3fea67b4..67f9d9ffacfb 100644
> --- a/tools/perf/builtin-annotate.c
> +++ b/tools/perf/builtin-annotate.c
> @@ -441,7 +441,7 @@ static int __cmd_annotate(struct perf_annotate *ann)
> }
>
> if (total_nr_samples == 0) {
> - ui__error("The %s file has no samples!\n", session->data->file.path);
> + ui__error("The %s data has no samples!\n", session->data->path);
> goto out;
> }
>
> @@ -578,7 +578,7 @@ int cmd_annotate(int argc, const char **argv)
> if (quiet)
> perf_quiet_option();
>
> - data.file.path = input_name;
> + data.path = input_name;
>
> annotate.session = perf_session__new(&data, false, &annotate.tool);
> if (annotate.session == NULL)
> diff --git a/tools/perf/builtin-buildid-cache.c b/tools/perf/builtin-buildid-cache.c
> index 115110a4796a..10457b10e568 100644
> --- a/tools/perf/builtin-buildid-cache.c
> +++ b/tools/perf/builtin-buildid-cache.c
> @@ -416,8 +416,8 @@ int cmd_buildid_cache(int argc, const char **argv)
> nsi = nsinfo__new(ns_id);
>
> if (missing_filename) {
> - data.file.path = missing_filename;
> - data.force = force;
> + data.path = missing_filename;
> + data.force = force;
>
> session = perf_session__new(&data, false, NULL);
> if (session == NULL)
> diff --git a/tools/perf/builtin-buildid-list.c b/tools/perf/builtin-buildid-list.c
> index 78abbe8d9d5f..f403e19488b5 100644
> --- a/tools/perf/builtin-buildid-list.c
> +++ b/tools/perf/builtin-buildid-list.c
> @@ -52,11 +52,9 @@ static int perf_session__list_build_ids(bool force, bool with_hits)
> {
> struct perf_session *session;
> struct perf_data data = {
> - .file = {
> - .path = input_name,
> - },
> - .mode = PERF_DATA_MODE_READ,
> - .force = force,
> + .path = input_name,
> + .mode = PERF_DATA_MODE_READ,
> + .force = force,
> };
>
> symbol__elf_init();
> diff --git a/tools/perf/builtin-c2c.c b/tools/perf/builtin-c2c.c
> index efaaab23c6fd..4272763a5e96 100644
> --- a/tools/perf/builtin-c2c.c
> +++ b/tools/perf/builtin-c2c.c
> @@ -2750,8 +2750,8 @@ static int perf_c2c__report(int argc, const char **argv)
> if (!input_name || !strlen(input_name))
> input_name = "perf.data";
>
> - data.file.path = input_name;
> - data.force = symbol_conf.force;
> + data.path = input_name;
> + data.force = symbol_conf.force;
>
> err = setup_display(display);
> if (err)
> diff --git a/tools/perf/builtin-diff.c b/tools/perf/builtin-diff.c
> index 751e1971456b..58fe0e88215c 100644
> --- a/tools/perf/builtin-diff.c
> +++ b/tools/perf/builtin-diff.c
> @@ -708,7 +708,7 @@ static void data__fprintf(void)
>
> data__for_each_file(i, d)
> fprintf(stdout, "# [%d] %s %s\n",
> - d->idx, d->data.file.path,
> + d->idx, d->data.path,
> !d->idx ? "(Baseline)" : "");
>
> fprintf(stdout, "#\n");
> @@ -779,14 +779,14 @@ static int __cmd_diff(void)
> data__for_each_file(i, d) {
> d->session = perf_session__new(&d->data, false, &tool);
> if (!d->session) {
> - pr_err("Failed to open %s\n", d->data.file.path);
> + pr_err("Failed to open %s\n", d->data.path);
> ret = -1;
> goto out_delete;
> }
>
> ret = perf_session__process_events(d->session);
> if (ret) {
> - pr_err("Failed to process %s\n", d->data.file.path);
> + pr_err("Failed to process %s\n", d->data.path);
> goto out_delete;
> }
>
> @@ -1289,9 +1289,9 @@ static int data_init(int argc, const char **argv)
> data__for_each_file(i, d) {
> struct perf_data *data = &d->data;
>
> - data->file.path = use_default ? defaults[i] : argv[i];
> - data->mode = PERF_DATA_MODE_READ,
> - data->force = force,
> + data->path = use_default ? defaults[i] : argv[i];
> + data->mode = PERF_DATA_MODE_READ,
> + data->force = force,
>
> d->idx = i;
> }
> diff --git a/tools/perf/builtin-evlist.c b/tools/perf/builtin-evlist.c
> index e06e822ce634..6e4f63b0da4a 100644
> --- a/tools/perf/builtin-evlist.c
> +++ b/tools/perf/builtin-evlist.c
> @@ -23,9 +23,7 @@ static int __cmd_evlist(const char *file_name, struct perf_attr_details *details
> struct perf_session *session;
> struct perf_evsel *pos;
> struct perf_data data = {
> - .file = {
> - .path = file_name,
> - },
> + .path = file_name,
> .mode = PERF_DATA_MODE_READ,
> .force = details->force,
> };
> diff --git a/tools/perf/builtin-inject.c b/tools/perf/builtin-inject.c
> index 9bb1f35d5cb7..24086b7f1b14 100644
> --- a/tools/perf/builtin-inject.c
> +++ b/tools/perf/builtin-inject.c
> @@ -770,10 +770,8 @@ int cmd_inject(int argc, const char **argv)
> .input_name = "-",
> .samples = LIST_HEAD_INIT(inject.samples),
> .output = {
> - .file = {
> - .path = "-",
> - },
> - .mode = PERF_DATA_MODE_WRITE,
> + .path = "-",
> + .mode = PERF_DATA_MODE_WRITE,
> },
> };
> struct perf_data data = {
> @@ -786,7 +784,7 @@ int cmd_inject(int argc, const char **argv)
> "Inject build-ids into the output stream"),
> OPT_STRING('i', "input", &inject.input_name, "file",
> "input file name"),
> - OPT_STRING('o', "output", &inject.output.file.path, "file",
> + OPT_STRING('o', "output", &inject.output.path, "file",
> "output file name"),
> OPT_BOOLEAN('s', "sched-stat", &inject.sched_stat,
> "Merge sched-stat and sched-switch for getting events "
> @@ -834,7 +832,7 @@ int cmd_inject(int argc, const char **argv)
>
> inject.tool.ordered_events = inject.sched_stat;
>
> - data.file.path = inject.input_name;
> + data.path = inject.input_name;
> inject.session = perf_session__new(&data, true, &inject.tool);
> if (inject.session == NULL)
> return -1;
> diff --git a/tools/perf/builtin-kmem.c b/tools/perf/builtin-kmem.c
> index b80ec0883537..fa520f4b8095 100644
> --- a/tools/perf/builtin-kmem.c
> +++ b/tools/perf/builtin-kmem.c
> @@ -1949,7 +1949,7 @@ int cmd_kmem(int argc, const char **argv)
> return __cmd_record(argc, argv);
> }
>
> - data.file.path = input_name;
> + data.path = input_name;
>
> kmem_session = session = perf_session__new(&data, false, &perf_kmem);
> if (session == NULL)
> diff --git a/tools/perf/builtin-kvm.c b/tools/perf/builtin-kvm.c
> index 3d4cbc4e87c7..dbb6f737a3e2 100644
> --- a/tools/perf/builtin-kvm.c
> +++ b/tools/perf/builtin-kvm.c
> @@ -1080,11 +1080,9 @@ static int read_events(struct perf_kvm_stat *kvm)
> .ordered_events = true,
> };
> struct perf_data file = {
> - .file = {
> - .path = kvm->file_name,
> - },
> - .mode = PERF_DATA_MODE_READ,
> - .force = kvm->force,
> + .path = kvm->file_name,
> + .mode = PERF_DATA_MODE_READ,
> + .force = kvm->force,
> };
>
> kvm->tool = eops;
> diff --git a/tools/perf/builtin-lock.c b/tools/perf/builtin-lock.c
> index 6e0189df2b3b..b9810a8d350a 100644
> --- a/tools/perf/builtin-lock.c
> +++ b/tools/perf/builtin-lock.c
> @@ -866,11 +866,9 @@ static int __cmd_report(bool display_info)
> .ordered_events = true,
> };
> struct perf_data data = {
> - .file = {
> - .path = input_name,
> - },
> - .mode = PERF_DATA_MODE_READ,
> - .force = force,
> + .path = input_name,
> + .mode = PERF_DATA_MODE_READ,
> + .force = force,
> };
>
> session = perf_session__new(&data, false, &eops);
> diff --git a/tools/perf/builtin-mem.c b/tools/perf/builtin-mem.c
> index ba7e8d87dec3..f45c8b502f63 100644
> --- a/tools/perf/builtin-mem.c
> +++ b/tools/perf/builtin-mem.c
> @@ -239,11 +239,9 @@ static int process_sample_event(struct perf_tool *tool,
> static int report_raw_events(struct perf_mem *mem)
> {
> struct perf_data data = {
> - .file = {
> - .path = input_name,
> - },
> - .mode = PERF_DATA_MODE_READ,
> - .force = mem->force,
> + .path = input_name,
> + .mode = PERF_DATA_MODE_READ,
> + .force = mem->force,
> };
> int ret;
> struct perf_session *session = perf_session__new(&data, false,
> diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
> index e5e9900c9039..f3f7f3100336 100644
> --- a/tools/perf/builtin-record.c
> +++ b/tools/perf/builtin-record.c
> @@ -918,7 +918,7 @@ record__switch_output(struct record *rec, bool at_exit)
>
> if (!quiet)
> fprintf(stderr, "[ perf record: Dump %s.%s ]\n",
> - data->file.path, timestamp);
> + data->path, timestamp);
>
> /* Output tracking events */
> if (!at_exit) {
> @@ -1461,7 +1461,7 @@ static int __cmd_record(struct record *rec, int argc, const char **argv)
>
> fprintf(stderr, "[ perf record: Captured and wrote %.3f MB %s%s%s ]\n",
> perf_data__size(data) / 1024.0 / 1024.0,
> - data->file.path, postfix, samples);
> + data->path, postfix, samples);
> }
>
> out_delete_session:
> @@ -1862,7 +1862,7 @@ static struct option __record_options[] = {
> OPT_STRING('C', "cpu", &record.opts.target.cpu_list, "cpu",
> "list of cpus to monitor"),
> OPT_U64('c', "count", &record.opts.user_interval, "event period to sample"),
> - OPT_STRING('o', "output", &record.data.file.path, "file",
> + OPT_STRING('o', "output", &record.data.path, "file",
> "output file name"),
> OPT_BOOLEAN_SET('i', "no-inherit", &record.opts.no_inherit,
> &record.opts.no_inherit_set,
> diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
> index 2e8c74d6430c..1532ebde6c4b 100644
> --- a/tools/perf/builtin-report.c
> +++ b/tools/perf/builtin-report.c
> @@ -899,7 +899,7 @@ static int __cmd_report(struct report *rep)
> rep->nr_entries += evsel__hists(pos)->nr_entries;
>
> if (rep->nr_entries == 0) {
> - ui__error("The %s file has no samples!\n", data->file.path);
> + ui__error("The %s data has no samples!\n", data->path);
> return 0;
> }
>
> @@ -1207,8 +1207,8 @@ int cmd_report(int argc, const char **argv)
> input_name = "perf.data";
> }
>
> - data.file.path = input_name;
> - data.force = symbol_conf.force;
> + data.path = input_name;
> + data.force = symbol_conf.force;
>
> repeat:
> session = perf_session__new(&data, false, &report.tool);
> diff --git a/tools/perf/builtin-sched.c b/tools/perf/builtin-sched.c
> index 640558e9352e..275f2d92a7bf 100644
> --- a/tools/perf/builtin-sched.c
> +++ b/tools/perf/builtin-sched.c
> @@ -1785,11 +1785,9 @@ static int perf_sched__read_events(struct perf_sched *sched)
> };
> struct perf_session *session;
> struct perf_data data = {
> - .file = {
> - .path = input_name,
> - },
> - .mode = PERF_DATA_MODE_READ,
> - .force = sched->force,
> + .path = input_name,
> + .mode = PERF_DATA_MODE_READ,
> + .force = sched->force,
> };
> int rc = -1;
>
> @@ -2958,11 +2956,9 @@ static int perf_sched__timehist(struct perf_sched *sched)
> { "sched:sched_migrate_task", timehist_migrate_task_event, },
> };
> struct perf_data data = {
> - .file = {
> - .path = input_name,
> - },
> - .mode = PERF_DATA_MODE_READ,
> - .force = sched->force,
> + .path = input_name,
> + .mode = PERF_DATA_MODE_READ,
> + .force = sched->force,
> };
>
> struct perf_session *session;
> diff --git a/tools/perf/builtin-script.c b/tools/perf/builtin-script.c
> index 373ea151dc60..5b1543f42290 100644
> --- a/tools/perf/builtin-script.c
> +++ b/tools/perf/builtin-script.c
> @@ -2951,10 +2951,8 @@ int find_scripts(char **scripts_array, char **scripts_path_array)
> DIR *scripts_dir, *lang_dir;
> struct perf_session *session;
> struct perf_data data = {
> - .file = {
> - .path = input_name,
> - },
> - .mode = PERF_DATA_MODE_READ,
> + .path = input_name,
> + .mode = PERF_DATA_MODE_READ,
> };
> char *temp;
> int i = 0;
> @@ -3427,8 +3425,8 @@ int cmd_script(int argc, const char **argv)
> argc = parse_options_subcommand(argc, argv, options, script_subcommands, script_usage,
> PARSE_OPT_STOP_AT_NON_OPTION);
>
> - data.file.path = input_name;
> - data.force = symbol_conf.force;
> + data.path = input_name;
> + data.force = symbol_conf.force;
>
> if (argc > 1 && !strncmp(argv[0], "rec", strlen("rec"))) {
> rec_script_path = get_script_path(argv[1], RECORD_SUFFIX);
> @@ -3654,7 +3652,7 @@ int cmd_script(int argc, const char **argv)
> goto out_delete;
> }
>
> - input = open(data.file.path, O_RDONLY); /* input_name */
> + input = open(data.path, O_RDONLY); /* input_name */
> if (input < 0) {
> err = -errno;
> perror("failed to open file");
> diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
> index bb24f9c17f9a..7b8f09b0b8bf 100644
> --- a/tools/perf/builtin-stat.c
> +++ b/tools/perf/builtin-stat.c
> @@ -1322,7 +1322,7 @@ static int __cmd_record(int argc, const char **argv)
> PARSE_OPT_STOP_AT_NON_OPTION);
>
> if (output_name)
> - data->file.path = output_name;
> + data->path = output_name;
>
> if (stat_config.run_count != 1 || forever) {
> pr_err("Cannot use -r option with perf stat record.\n");
> @@ -1523,8 +1523,8 @@ static int __cmd_report(int argc, const char **argv)
> input_name = "perf.data";
> }
>
> - perf_stat.data.file.path = input_name;
> - perf_stat.data.mode = PERF_DATA_MODE_READ;
> + perf_stat.data.path = input_name;
> + perf_stat.data.mode = PERF_DATA_MODE_READ;
>
> session = perf_session__new(&perf_stat.data, false, &perf_stat.tool);
> if (session == NULL)
> diff --git a/tools/perf/builtin-timechart.c b/tools/perf/builtin-timechart.c
> index 775b99833e51..9b98687a27b9 100644
> --- a/tools/perf/builtin-timechart.c
> +++ b/tools/perf/builtin-timechart.c
> @@ -1602,11 +1602,9 @@ static int __cmd_timechart(struct timechart *tchart, const char *output_name)
> { "syscalls:sys_exit_select", process_exit_poll },
> };
> struct perf_data data = {
> - .file = {
> - .path = input_name,
> - },
> - .mode = PERF_DATA_MODE_READ,
> - .force = tchart->force,
> + .path = input_name,
> + .mode = PERF_DATA_MODE_READ,
> + .force = tchart->force,
> };
>
> struct perf_session *session = perf_session__new(&data, false,
> diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
> index 1a11fe656afc..f5b3a1e9c1dd 100644
> --- a/tools/perf/builtin-trace.c
> +++ b/tools/perf/builtin-trace.c
> @@ -3154,11 +3154,9 @@ static int trace__replay(struct trace *trace)
> { "probe:vfs_getname", trace__vfs_getname, },
> };
> struct perf_data data = {
> - .file = {
> - .path = input_name,
> - },
> - .mode = PERF_DATA_MODE_READ,
> - .force = trace->force,
> + .path = input_name,
> + .mode = PERF_DATA_MODE_READ,
> + .force = trace->force,
> };
> struct perf_session *session;
> struct perf_evsel *evsel;
> diff --git a/tools/perf/util/data-convert-bt.c b/tools/perf/util/data-convert-bt.c
> index 2a36fab76994..ea742a254aa5 100644
> --- a/tools/perf/util/data-convert-bt.c
> +++ b/tools/perf/util/data-convert-bt.c
> @@ -1650,7 +1650,7 @@ int bt_convert__perf2ctf(const char *input, const char *path,
>
> fprintf(stderr,
> "[ perf data convert: Converted '%s' into CTF data '%s' ]\n",
> - data.file.path, path);
> + data.path, path);
>
> fprintf(stderr,
> "[ perf data convert: Converted and wrote %.3f MB (%" PRIu64 " samples",
> diff --git a/tools/perf/util/data.c b/tools/perf/util/data.c
> index 09eceda17fc2..e16d06ed1100 100644
> --- a/tools/perf/util/data.c
> +++ b/tools/perf/util/data.c
> @@ -19,11 +19,11 @@ static bool check_pipe(struct perf_data *data)
> int fd = perf_data__is_read(data) ?
> STDIN_FILENO : STDOUT_FILENO;
>
> - if (!data->file.path) {
> + if (!data->path) {
> if (!fstat(fd, &st) && S_ISFIFO(st.st_mode))
> is_pipe = true;
> } else {
> - if (!strcmp(data->file.path, "-"))
> + if (!strcmp(data->path, "-"))
> is_pipe = true;
> }
>
> @@ -37,13 +37,13 @@ static int check_backup(struct perf_data *data)
> {
> struct stat st;
>
> - if (!stat(data->file.path, &st) && st.st_size) {
> + if (!stat(data->path, &st) && st.st_size) {
> /* TODO check errors properly */
> char oldname[PATH_MAX];
> snprintf(oldname, sizeof(oldname), "%s.old",
> - data->file.path);
> + data->path);
> unlink(oldname);
> - rename(data->file.path, oldname);
> + rename(data->path, oldname);
> }
>
> return 0;
> @@ -115,8 +115,22 @@ static int open_file(struct perf_data *data)
> fd = perf_data__is_read(data) ?
> open_file_read(data) : open_file_write(data);
>
> + if (fd < 0) {
> + free(data->file.path);
> + return -1;
> + }
> +
> data->file.fd = fd;
> - return fd < 0 ? -1 : 0;
> + return 0;
> +}
> +
> +static int open_file_dup(struct perf_data *data)
> +{
> + data->file.path = strdup(data->path);
> + if (!data->file.path)
> + return -ENOMEM;
> +
> + return open_file(data);
> }
>
> int perf_data__open(struct perf_data *data)
> @@ -124,14 +138,15 @@ int perf_data__open(struct perf_data *data)
> if (check_pipe(data))
> return 0;
>
> - if (!data->file.path)
> - data->file.path = "perf.data";
> + if (!data->path)
> + data->path = "perf.data";
>
> - return open_file(data);
> + return open_file_dup(data);
> }
>
> void perf_data__close(struct perf_data *data)
> {
> + free(data->file.path);
> close(data->file.fd);
> }
>
> @@ -159,15 +174,15 @@ int perf_data__switch(struct perf_data *data,
> if (perf_data__is_read(data))
> return -EINVAL;
>
> - if (asprintf(&new_filepath, "%s.%s", data->file.path, postfix) < 0)
> + if (asprintf(&new_filepath, "%s.%s", data->path, postfix) < 0)
> return -ENOMEM;
>
> /*
> * Only fire a warning, don't return error, continue fill
> * original file.
> */
> - if (rename(data->file.path, new_filepath))
> - pr_warning("Failed to rename %s to %s\n", data->file.path, new_filepath);
> + if (rename(data->path, new_filepath))
> + pr_warning("Failed to rename %s to %s\n", data->path, new_filepath);
>
> if (!at_exit) {
> close(data->file.fd);
> diff --git a/tools/perf/util/data.h b/tools/perf/util/data.h
> index 85f9c0dbf982..2bce28117ccf 100644
> --- a/tools/perf/util/data.h
> +++ b/tools/perf/util/data.h
> @@ -10,12 +10,13 @@ enum perf_data_mode {
> };
>
> struct perf_data_file {
> - const char *path;
> + char *path;
> int fd;
> unsigned long size;
> };
>
> struct perf_data {
> + const char *path;
> struct perf_data_file file;
> bool is_pipe;
> bool force;
> --
> 2.17.2
--
- Arnaldo
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