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-rw-r--r--tools/perf/builtin-probe.c126
1 files changed, 89 insertions, 37 deletions
diff --git a/tools/perf/builtin-probe.c b/tools/perf/builtin-probe.c
index c1e6774fd3e..c30a3359234 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;
@@ -120,22 +121,33 @@ 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);
}
-#ifndef NO_LIBDWARF
+#ifndef NO_DWARF_SUPPORT
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
@@ -144,13 +156,16 @@ static const char * const probe_usage[] = {
"perf probe [<options>] --add 'PROBEDEF' [--add 'PROBEDEF' ...]",
"perf probe [<options>] --del '[GROUP:]EVENT' ...",
"perf probe --list",
+#ifndef NO_DWARF_SUPPORT
+ "perf probe --line 'LINEDESC'",
+#endif
NULL
};
static const struct option options[] = {
OPT_BOOLEAN('v', "verbose", &verbose,
"be more verbose (show parsed arguments, etc)"),
-#ifndef NO_LIBDWARF
+#ifndef NO_DWARF_SUPPORT
OPT_STRING('k', "vmlinux", &symbol_conf.vmlinux_name,
"file", "vmlinux pathname"),
#endif
@@ -159,36 +174,60 @@ static const struct option options[] = {
OPT_CALLBACK('d', "del", NULL, "[GROUP:]EVENT", "delete a probe event.",
opt_del_probe_event),
OPT_CALLBACK('a', "add", NULL,
-#ifdef NO_LIBDWARF
- "[EVENT=]FUNC[+OFFS|%return] [ARG ...]",
+#ifdef NO_DWARF_SUPPORT
+ "[EVENT=]FUNC[+OFF|%return] [ARG ...]",
#else
- "[EVENT=]FUNC[+OFFS|%return|:RLN][@SRC]|SRC:ALN [ARG ...]",
+ "[EVENT=]FUNC[@SRC][+OFF|%return|:RL|;PT]|SRC:AL|SRC;PT"
+ " [ARG ...]",
#endif
"probe point definition, where\n"
"\t\tGROUP:\tGroup name (optional)\n"
"\t\tEVENT:\tEvent name\n"
"\t\tFUNC:\tFunction name\n"
- "\t\tOFFS:\tOffset from function entry (in byte)\n"
+ "\t\tOFF:\tOffset from function entry (in byte)\n"
"\t\t%return:\tPut the probe at function return\n"
-#ifdef NO_LIBDWARF
+#ifdef NO_DWARF_SUPPORT
"\t\tARG:\tProbe argument (only \n"
#else
"\t\tSRC:\tSource code path\n"
- "\t\tRLN:\tRelative line number from function entry.\n"
- "\t\tALN:\tAbsolute line number in file.\n"
+ "\t\tRL:\tRelative line number from function entry.\n"
+ "\t\tAL:\tAbsolute line number in file.\n"
+ "\t\tPT:\tLazy expression of line code.\n"
"\t\tARG:\tProbe argument (local variable name or\n"
#endif
"\t\t\tkprobe-tracer argument format.)\n",
opt_add_probe_event),
OPT_BOOLEAN('f', "force", &session.force_add, "forcibly add events"
" with existing name"),
+#ifndef NO_DWARF_SUPPORT
+ 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;
-#ifndef NO_LIBDWARF
+#ifndef NO_DWARF_SUPPORT
int fd;
#endif
struct probe_point *pp;
@@ -203,7 +242,8 @@ 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 +255,34 @@ 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_DWARF_SUPPORT
+ 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);
@@ -226,25 +290,13 @@ 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
+#ifdef NO_DWARF_SUPPORT
die("Debuginfo-analysis is not supported");
-#else /* !NO_LIBDWARF */
+#else /* !NO_DWARF_SUPPORT */
pr_debug("Some probes require debuginfo.\n");
fd = open_vmlinux();
@@ -264,7 +316,7 @@ int cmd_probe(int argc, const char **argv, const char *prefix __used)
continue;
lseek(fd, SEEK_SET, 0);
- ret = find_probepoint(fd, pp);
+ ret = find_probe_point(fd, pp);
if (ret > 0)
continue;
if (ret == 0) { /* No error but failed to find probe point. */
@@ -285,7 +337,7 @@ int cmd_probe(int argc, const char **argv, const char *prefix __used)
close(fd);
end_dwarf:
-#endif /* !NO_LIBDWARF */
+#endif /* !NO_DWARF_SUPPORT */
/* Synthesize probes without dwarf */
for (i = 0; i < session.nr_probe; i++) {
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-28 15:47:46 +0000