perf tools: Propagate perf_config() errors

Previously these were being ignored, sometimes silently.

Stop doing that, emitting debug messages and handling the errors.

Testing it:

  $ cat ~/.perfconfig
  cat: /home/acme/.perfconfig: No such file or directory
  $ perf stat -e cycles usleep 1

   Performance counter stats for 'usleep 1':

           938,996      cycles:u

       0.003813731 seconds time elapsed

  $ perf top --stdio
  Error:
  You may not have permission to collect system-wide stats.

  Consider tweaking /proc/sys/kernel/perf_event_paranoid,
  <SNIP>
  [ perf record: Captured and wrote 0.019 MB perf.data (7 samples) ]
  [acme@jouet linux]$ perf report --stdio
  # To display the perf.data header info, please use --header/--header-only options.
  # Overhead  Command  Shared Object      Symbol
  # ........  .......  .................  .........................
    71.77%  usleep   libc-2.24.so       [.] _dl_addr
    27.07%  usleep   ld-2.24.so         [.] _dl_next_ld_env_entry
     1.13%  usleep   [kernel.kallsyms]  [k] page_fault
  $
  $ touch ~/.perfconfig
  $ ls -la ~/.perfconfig
  -rw-rw-r--. 1 acme acme 0 Jan 27 12:14 /home/acme/.perfconfig
  $
  $ perf stat -e instructions usleep 1

   Performance counter stats for 'usleep 1':

           244,610      instructions:u

       0.000805383 seconds time elapsed

  $
  [root@jouet ~]# chown acme.acme ~/.perfconfig
  [root@jouet ~]# perf stat -e cycles usleep 1
    Warning: File /root/.perfconfig not owned by current user or root, ignoring it.

   Performance counter stats for 'usleep 1':

           937,615      cycles

       0.000836931 seconds time elapsed
  #

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/n/tip-j2rq96so6xdqlr8p8rd6a3jx@git.kernel.orgSigned-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent afc45cf5
......@@ -447,11 +447,13 @@ int cmd_help(int argc, const char **argv, const char *prefix __maybe_unused)
NULL
};
const char *alias;
int rc = 0;
int rc;
load_command_list("perf-", &main_cmds, &other_cmds);
perf_config(perf_help_config, &help_format);
rc = perf_config(perf_help_config, &help_format);
if (rc)
return rc;
argc = parse_options_subcommand(argc, argv, builtin_help_options,
builtin_help_subcommands, builtin_help_usage, 0);
......
......@@ -1920,10 +1920,12 @@ int cmd_kmem(int argc, const char **argv, const char *prefix __maybe_unused)
NULL
};
struct perf_session *session;
int ret = -1;
const char errmsg[] = "No %s allocation events found. Have you run 'perf kmem record --%s'?\n";
int ret = perf_config(kmem_config, NULL);
if (ret)
return ret;
perf_config(kmem_config, NULL);
argc = parse_options_subcommand(argc, argv, kmem_options,
kmem_subcommands, kmem_usage, 0);
......@@ -1948,6 +1950,8 @@ int cmd_kmem(int argc, const char **argv, const char *prefix __maybe_unused)
if (session == NULL)
return -1;
ret = -1;
if (kmem_slab) {
if (!perf_evlist__find_tracepoint_by_name(session->evlist,
"kmem:kmalloc")) {
......
......@@ -1670,7 +1670,9 @@ int cmd_record(int argc, const char **argv, const char *prefix __maybe_unused)
if (rec->evlist == NULL)
return -ENOMEM;
perf_config(perf_record_config, rec);
err = perf_config(perf_record_config, rec);
if (err)
return err;
argc = parse_options(argc, argv, record_options, record_usage,
PARSE_OPT_STOP_AT_NON_OPTION);
......
......@@ -847,7 +847,9 @@ int cmd_report(int argc, const char **argv, const char *prefix __maybe_unused)
if (ret < 0)
return ret;
perf_config(report__config, &report);
ret = perf_config(report__config, &report);
if (ret)
return ret;
argc = parse_options(argc, argv, options, report_usage, 0);
if (argc) {
......
......@@ -1216,7 +1216,9 @@ int cmd_top(int argc, const char **argv, const char *prefix __maybe_unused)
if (top.evlist == NULL)
return -ENOMEM;
perf_config(perf_top_config, &top);
status = perf_config(perf_top_config, &top);
if (status)
return status;
argc = parse_options(argc, argv, options, top_usage, 0);
if (argc)
......
......@@ -90,11 +90,12 @@ static int pager_command_config(const char *var, const char *value, void *data)
/* returns 0 for "no pager", 1 for "use pager", and -1 for "not specified" */
int check_pager_config(const char *cmd)
{
int err;
struct pager_config c;
c.cmd = cmd;
c.val = -1;
perf_config(pager_command_config, &c);
return c.val;
err = perf_config(pager_command_config, &c);
return err ?: c.val;
}
static int browser_command_config(const char *var, const char *value, void *data)
......@@ -113,11 +114,12 @@ static int browser_command_config(const char *var, const char *value, void *data
*/
static int check_browser_config(const char *cmd)
{
int err;
struct pager_config c;
c.cmd = cmd;
c.val = -1;
perf_config(browser_command_config, &c);
return c.val;
err = perf_config(browser_command_config, &c);
return err ?: c.val;
}
static void commit_pager_choice(void)
......@@ -509,6 +511,7 @@ static void cache_line_size(int *cacheline_sizep)
int main(int argc, const char **argv)
{
int err;
const char *cmd;
char sbuf[STRERR_BUFSIZE];
int value;
......@@ -534,7 +537,9 @@ int main(int argc, const char **argv)
srandom(time(NULL));
perf_config__init();
perf_config(perf_default_config, NULL);
err = perf_config(perf_default_config, NULL);
if (err)
return err;
set_buildid_dir(NULL);
/* get debugfs/tracefs mount point from /proc/mounts */
......
......@@ -48,6 +48,8 @@ static int parse_callchain_mode(const char *value)
callchain_param.mode = CHAIN_FOLDED;
return 0;
}
pr_err("Invalid callchain mode: %s\n", value);
return -1;
}
......@@ -63,6 +65,8 @@ static int parse_callchain_order(const char *value)
callchain_param.order_set = true;
return 0;
}
pr_err("Invalid callchain order: %s\n", value);
return -1;
}
......@@ -80,6 +84,8 @@ static int parse_callchain_sort_key(const char *value)
callchain_param.branch_callstack = 1;
return 0;
}
pr_err("Invalid callchain sort key: %s\n", value);
return -1;
}
......@@ -97,6 +103,8 @@ static int parse_callchain_value(const char *value)
callchain_param.value = CCVAL_COUNT;
return 0;
}
pr_err("Invalid callchain config key: %s\n", value);
return -1;
}
......@@ -210,13 +218,17 @@ int perf_callchain_config(const char *var, const char *value)
return parse_callchain_sort_key(value);
if (!strcmp(var, "threshold")) {
callchain_param.min_percent = strtod(value, &endptr);
if (value == endptr)
if (value == endptr) {
pr_err("Invalid callchain threshold: %s\n", value);
return -1;
}
}
if (!strcmp(var, "print-limit")) {
callchain_param.print_limit = strtod(value, &endptr);
if (value == endptr)
if (value == endptr) {
pr_err("Invalid callchain print limit: %s\n", value);
return -1;
}
}
return 0;
......
......@@ -386,8 +386,10 @@ static int perf_buildid_config(const char *var, const char *value)
if (!strcmp(var, "buildid.dir")) {
const char *dir = perf_config_dirname(var, value);
if (!dir)
if (!dir) {
pr_err("Invalid buildid directory!\n");
return -1;
}
strncpy(buildid_dir, dir, MAXPATHLEN-1);
buildid_dir[MAXPATHLEN-1] = '\0';
}
......@@ -405,10 +407,9 @@ static int perf_default_core_config(const char *var __maybe_unused,
static int perf_ui_config(const char *var, const char *value)
{
/* Add other config variables here. */
if (!strcmp(var, "ui.show-headers")) {
if (!strcmp(var, "ui.show-headers"))
symbol_conf.show_hist_headers = perf_config_bool(var, value);
return 0;
}
return 0;
}
......
......@@ -1473,7 +1473,7 @@ int bt_convert__perf2ctf(const char *input, const char *path,
},
};
struct ctf_writer *cw = &c.writer;
int err = -1;
int err;
if (opts->all) {
c.tool.comm = process_comm_event;
......@@ -1481,12 +1481,15 @@ int bt_convert__perf2ctf(const char *input, const char *path,
c.tool.fork = process_fork_event;
}
perf_config(convert__config, &c);
err = perf_config(convert__config, &c);
if (err)
return err;
/* CTF writer */
if (ctf_writer__init(cw, path))
return -1;
err = -1;
/* perf.data session */
session = perf_session__new(&file, 0, &c.tool);
if (!session)
......
......@@ -2439,8 +2439,10 @@ int parse_filter_percentage(const struct option *opt __maybe_unused,
symbol_conf.filter_relative = true;
else if (!strcmp(arg, "absolute"))
symbol_conf.filter_relative = false;
else
else {
pr_debug("Invalud percentage: %s\n", arg);
return -1;
}
return 0;
}
......
......@@ -2159,7 +2159,9 @@ int intel_pt_process_auxtrace_info(union perf_event *event,
addr_filters__init(&pt->filts);
perf_config(intel_pt_perf_config, pt);
err = perf_config(intel_pt_perf_config, pt);
if (err)
goto err_free;
err = auxtrace_queues__init(&pt->queues);
if (err)
......
......@@ -48,8 +48,10 @@ int perf_llvm_config(const char *var, const char *value)
llvm_param.kbuild_opts = strdup(value);
else if (!strcmp(var, "dump-obj"))
llvm_param.dump_obj = !!perf_config_bool(var, value);
else
else {
pr_debug("Invalid LLVM config option: %s\n", value);
return -1;
}
llvm_param.user_set_param = true;
return 0;
}
......
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