linux/tools/perf/util/evsel_fprintf.c
Ian Rogers 8ab12a2038 perf callchain: Use pthread keys for tls callchain_cursor
Pthread keys are more portable than __thread and allow the association
of a destructor with the key. Use the destructor to clean up TLS
callchain cursors to aid understanding memory leaks.

Committer notes:

Had to fixup a series of unconverted places and also check for the
return of get_tls_callchain_cursor() as it may fail and return NULL.

In that unlikely case we now either print something to a file, if the
caller was expecting to print a callchain, or return an error code to
state that resolving the callchain isn't possible.

In some cases this was made easier because thread__resolve_callchain()
already can fail for other reasons, so this new one (cursor == NULL) can
be added and the callers don't have to explicitely check for this new
condition.

Signed-off-by: Ian Rogers <irogers@google.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ali Saidi <alisaidi@amazon.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Athira Rajeev <atrajeev@linux.vnet.ibm.com>
Cc: Brian Robbins <brianrob@linux.microsoft.com>
Cc: Changbin Du <changbin.du@huawei.com>
Cc: Dmitrii Dolgov <9erthalion6@gmail.com>
Cc: Fangrui Song <maskray@google.com>
Cc: German Gomez <german.gomez@arm.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Ivan Babrou <ivan@cloudflare.com>
Cc: James Clark <james.clark@arm.com>
Cc: Jing Zhang <renyu.zj@linux.alibaba.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: John Garry <john.g.garry@oracle.com>
Cc: K Prateek Nayak <kprateek.nayak@amd.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Liam Howlett <liam.howlett@oracle.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Miguel Ojeda <ojeda@kernel.org>
Cc: Mike Leach <mike.leach@linaro.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ravi Bangoria <ravi.bangoria@amd.com>
Cc: Sean Christopherson <seanjc@google.com>
Cc: Steinar H. Gunderson <sesse@google.com>
Cc: Suzuki Poulouse <suzuki.poulose@arm.com>
Cc: Wenyu Liu <liuwenyu7@huawei.com>
Cc: Will Deacon <will@kernel.org>
Cc: Yang Jihong <yangjihong1@huawei.com>
Cc: Ye Xingchen <ye.xingchen@zte.com.cn>
Cc: Yuan Can <yuancan@huawei.com>
Cc: coresight@lists.linaro.org
Cc: linux-arm-kernel@lists.infradead.org
Link: https://lore.kernel.org/r/20230608232823.4027869-25-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2023-06-12 15:57:54 -03:00

252 lines
6.4 KiB
C

// SPDX-License-Identifier: GPL-2.0
#include <inttypes.h>
#include <stdio.h>
#include <stdbool.h>
#include "util/evlist.h"
#include "evsel.h"
#include "util/evsel_fprintf.h"
#include "util/event.h"
#include "callchain.h"
#include "map.h"
#include "strlist.h"
#include "symbol.h"
#include "srcline.h"
#include "dso.h"
#ifdef HAVE_LIBTRACEEVENT
#include <traceevent/event-parse.h>
#endif
static int comma_fprintf(FILE *fp, bool *first, const char *fmt, ...)
{
va_list args;
int ret = 0;
if (!*first) {
ret += fprintf(fp, ",");
} else {
ret += fprintf(fp, ":");
*first = false;
}
va_start(args, fmt);
ret += vfprintf(fp, fmt, args);
va_end(args);
return ret;
}
static int __print_attr__fprintf(FILE *fp, const char *name, const char *val, void *priv)
{
return comma_fprintf(fp, (bool *)priv, " %s: %s", name, val);
}
int evsel__fprintf(struct evsel *evsel, struct perf_attr_details *details, FILE *fp)
{
bool first = true;
int printed = 0;
if (details->event_group) {
struct evsel *pos;
if (!evsel__is_group_leader(evsel))
return 0;
if (evsel->core.nr_members > 1)
printed += fprintf(fp, "%s{", evsel->group_name ?: "");
printed += fprintf(fp, "%s", evsel__name(evsel));
for_each_group_member(pos, evsel)
printed += fprintf(fp, ",%s", evsel__name(pos));
if (evsel->core.nr_members > 1)
printed += fprintf(fp, "}");
goto out;
}
printed += fprintf(fp, "%s", evsel__name(evsel));
if (details->verbose) {
printed += perf_event_attr__fprintf(fp, &evsel->core.attr,
__print_attr__fprintf, &first);
} else if (details->freq) {
const char *term = "sample_freq";
if (!evsel->core.attr.freq)
term = "sample_period";
printed += comma_fprintf(fp, &first, " %s=%" PRIu64,
term, (u64)evsel->core.attr.sample_freq);
}
#ifdef HAVE_LIBTRACEEVENT
if (details->trace_fields) {
struct tep_format_field *field;
if (evsel->core.attr.type != PERF_TYPE_TRACEPOINT) {
printed += comma_fprintf(fp, &first, " (not a tracepoint)");
goto out;
}
field = evsel->tp_format->format.fields;
if (field == NULL) {
printed += comma_fprintf(fp, &first, " (no trace field)");
goto out;
}
printed += comma_fprintf(fp, &first, " trace_fields: %s", field->name);
field = field->next;
while (field) {
printed += comma_fprintf(fp, &first, "%s", field->name);
field = field->next;
}
}
#endif
out:
fputc('\n', fp);
return ++printed;
}
#ifndef PYTHON_PERF
int sample__fprintf_callchain(struct perf_sample *sample, int left_alignment,
unsigned int print_opts, struct callchain_cursor *cursor,
struct strlist *bt_stop_list, FILE *fp)
{
int printed = 0;
struct callchain_cursor_node *node;
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;
int print_unknown_as_addr = print_opts & EVSEL__PRINT_UNKNOWN_AS_ADDR;
int print_arrow = print_opts & EVSEL__PRINT_CALLCHAIN_ARROW;
int print_skip_ignored = print_opts & EVSEL__PRINT_SKIP_IGNORED;
char s = print_oneline ? ' ' : '\t';
bool first = true;
if (cursor == NULL)
return fprintf(fp, "<not enough memory for the callchain cursor>%s", print_oneline ? "" : "\n");
if (sample->callchain) {
callchain_cursor_commit(cursor);
while (1) {
struct symbol *sym;
struct map *map;
u64 addr = 0;
node = callchain_cursor_current(cursor);
if (!node)
break;
sym = node->ms.sym;
map = node->ms.map;
if (sym && sym->ignore && print_skip_ignored)
goto next;
printed += fprintf(fp, "%-*.*s", left_alignment, left_alignment, " ");
if (print_arrow && !first)
printed += fprintf(fp, " <-");
if (map)
addr = map__map_ip(map, node->ip);
if (print_ip)
printed += fprintf(fp, "%c%16" PRIx64, s, node->ip);
if (print_sym) {
struct addr_location node_al;
addr_location__init(&node_al);
printed += fprintf(fp, " ");
node_al.addr = addr;
node_al.map = map__get(map);
if (print_symoffset) {
printed += __symbol__fprintf_symname_offs(sym, &node_al,
print_unknown_as_addr,
true, fp);
} else {
printed += __symbol__fprintf_symname(sym, &node_al,
print_unknown_as_addr, fp);
}
addr_location__exit(&node_al);
}
if (print_dso && (!sym || !sym->inlined))
printed += map__fprintf_dsoname_dsoff(map, print_dsoff, addr, fp);
if (print_srcline)
printed += map__fprintf_srcline(map, addr, "\n ", fp);
if (sym && sym->inlined)
printed += fprintf(fp, " (inlined)");
if (!print_oneline)
printed += fprintf(fp, "\n");
/* Add srccode here too? */
if (bt_stop_list && sym &&
strlist__has_entry(bt_stop_list, sym->name)) {
break;
}
first = false;
next:
callchain_cursor_advance(cursor);
}
}
return printed;
}
int sample__fprintf_sym(struct perf_sample *sample, struct addr_location *al,
int left_alignment, unsigned int print_opts,
struct callchain_cursor *cursor, struct strlist *bt_stop_list, FILE *fp)
{
int printed = 0;
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;
if (cursor != NULL) {
printed += sample__fprintf_callchain(sample, left_alignment, print_opts,
cursor, bt_stop_list, fp);
} else {
printed += fprintf(fp, "%-*.*s", left_alignment, left_alignment, " ");
if (print_ip)
printed += fprintf(fp, "%16" PRIx64, sample->ip);
if (print_sym) {
printed += fprintf(fp, " ");
if (print_symoffset) {
printed += __symbol__fprintf_symname_offs(al->sym, al,
print_unknown_as_addr,
true, fp);
} else {
printed += __symbol__fprintf_symname(al->sym, al,
print_unknown_as_addr, fp);
}
}
if (print_dso)
printed += map__fprintf_dsoname_dsoff(al->map, print_dsoff, al->addr, fp);
if (print_srcline)
printed += map__fprintf_srcline(al->map, al->addr, "\n ", fp);
}
return printed;
}
#endif /* PYTHON_PERF */