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Diffstat (limited to 'tools/perf/builtin-probe.c')
-rw-r--r--tools/perf/builtin-probe.c94
1 files changed, 71 insertions, 23 deletions
diff --git a/tools/perf/builtin-probe.c b/tools/perf/builtin-probe.c
index c1e6774fd3ed..ad47bd4c50ef 100644
--- a/tools/perf/builtin-probe.c
+++ b/tools/perf/builtin-probe.c
@@ -41,7 +41,6 @@
#include "util/debugfs.h"
#include "util/symbol.h"
#include "util/thread.h"
-#include "util/session.h"
#include "util/parse-options.h"
#include "util/parse-events.h" /* For debugfs_path */
#include "util/probe-finder.h"
@@ -55,11 +54,13 @@ static struct {
bool need_dwarf;
bool list_events;
bool force_add;
+ bool show_lines;
int nr_probe;
struct probe_point probes[MAX_PROBES];
struct strlist *dellist;
- struct perf_session *psession;
- struct map *kmap;
+ struct map_groups kmap_groups;
+ struct map *kmaps[MAP__NR_TYPES];
+ struct line_range line_range;
} session;
@@ -120,8 +121,8 @@ static int opt_del_probe_event(const struct option *opt __used,
static void evaluate_probe_point(struct probe_point *pp)
{
struct symbol *sym;
- sym = map__find_symbol_by_name(session.kmap, pp->function,
- session.psession, NULL);
+ sym = map__find_symbol_by_name(session.kmaps[MAP__FUNCTION],
+ pp->function, NULL);
if (!sym)
die("Kernel symbol \'%s\' not found - probe not added.",
pp->function);
@@ -130,12 +131,23 @@ static void evaluate_probe_point(struct probe_point *pp)
#ifndef NO_LIBDWARF
static int open_vmlinux(void)
{
- if (map__load(session.kmap, session.psession, NULL) < 0) {
+ if (map__load(session.kmaps[MAP__FUNCTION], NULL) < 0) {
pr_debug("Failed to load kernel map.\n");
return -EINVAL;
}
- pr_debug("Try to open %s\n", session.kmap->dso->long_name);
- return open(session.kmap->dso->long_name, O_RDONLY);
+ pr_debug("Try to open %s\n",
+ session.kmaps[MAP__FUNCTION]->dso->long_name);
+ return open(session.kmaps[MAP__FUNCTION]->dso->long_name, O_RDONLY);
+}
+
+static int opt_show_lines(const struct option *opt __used,
+ const char *str, int unset __used)
+{
+ if (str)
+ parse_line_range_desc(str, &session.line_range);
+ INIT_LIST_HEAD(&session.line_range.line_list);
+ session.show_lines = true;
+ return 0;
}
#endif
@@ -144,6 +156,7 @@ static const char * const probe_usage[] = {
"perf probe [<options>] --add 'PROBEDEF' [--add 'PROBEDEF' ...]",
"perf probe [<options>] --del '[GROUP:]EVENT' ...",
"perf probe --list",
+ "perf probe --line 'LINEDESC'",
NULL
};
@@ -182,9 +195,31 @@ static const struct option options[] = {
opt_add_probe_event),
OPT_BOOLEAN('f', "force", &session.force_add, "forcibly add events"
" with existing name"),
+#ifndef NO_LIBDWARF
+ OPT_CALLBACK('L', "line", NULL,
+ "FUNC[:RLN[+NUM|:RLN2]]|SRC:ALN[+NUM|:ALN2]",
+ "Show source code lines.", opt_show_lines),
+#endif
OPT_END()
};
+/* Initialize symbol maps for vmlinux */
+static void init_vmlinux(void)
+{
+ symbol_conf.sort_by_name = true;
+ if (symbol_conf.vmlinux_name == NULL)
+ symbol_conf.try_vmlinux_path = true;
+ else
+ pr_debug("Use vmlinux: %s\n", symbol_conf.vmlinux_name);
+ if (symbol__init() < 0)
+ die("Failed to init symbol map.");
+
+ map_groups__init(&session.kmap_groups);
+ if (map_groups__create_kernel_maps(&session.kmap_groups,
+ session.kmaps) < 0)
+ die("Failed to create kernel maps.");
+}
+
int cmd_probe(int argc, const char **argv, const char *prefix __used)
{
int i, ret;
@@ -203,7 +238,8 @@ int cmd_probe(int argc, const char **argv, const char *prefix __used)
parse_probe_event_argv(argc, argv);
}
- if ((!session.nr_probe && !session.dellist && !session.list_events))
+ if ((!session.nr_probe && !session.dellist && !session.list_events &&
+ !session.show_lines))
usage_with_options(probe_usage, options);
if (debugfs_valid_mountpoint(debugfs_path) < 0)
@@ -215,10 +251,34 @@ int cmd_probe(int argc, const char **argv, const char *prefix __used)
" --add/--del.\n");
usage_with_options(probe_usage, options);
}
+ if (session.show_lines) {
+ pr_warning(" Error: Don't use --list with --line.\n");
+ usage_with_options(probe_usage, options);
+ }
show_perf_probe_events();
return 0;
}
+#ifndef NO_LIBDWARF
+ if (session.show_lines) {
+ if (session.nr_probe != 0 || session.dellist) {
+ pr_warning(" Error: Don't use --line with"
+ " --add/--del.\n");
+ usage_with_options(probe_usage, options);
+ }
+ init_vmlinux();
+ fd = open_vmlinux();
+ if (fd < 0)
+ die("Could not open debuginfo file.");
+ ret = find_line_range(fd, &session.line_range);
+ if (ret <= 0)
+ die("Source line is not found.\n");
+ close(fd);
+ show_line_range(&session.line_range);
+ return 0;
+ }
+#endif
+
if (session.dellist) {
del_trace_kprobe_events(session.dellist);
strlist__delete(session.dellist);
@@ -226,20 +286,8 @@ int cmd_probe(int argc, const char **argv, const char *prefix __used)
return 0;
}
- /* Initialize symbol maps for vmlinux */
- symbol_conf.sort_by_name = true;
- if (symbol_conf.vmlinux_name == NULL)
- symbol_conf.try_vmlinux_path = true;
- if (symbol__init() < 0)
- die("Failed to init symbol map.");
- session.psession = perf_session__new(NULL, O_WRONLY, false);
- if (session.psession == NULL)
- die("Failed to init perf_session.");
- session.kmap = map_groups__find_by_name(&session.psession->kmaps,
- MAP__FUNCTION,
- "[kernel.kallsyms]");
- if (!session.kmap)
- die("Could not find kernel map.\n");
+ /* Add probes */
+ init_vmlinux();
if (session.need_dwarf)
#ifdef NO_LIBDWARF