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Diffstat (limited to 'tools/perf/util/probe-event.c')
-rw-r--r--tools/perf/util/probe-event.c163
1 files changed, 144 insertions, 19 deletions
diff --git a/tools/perf/util/probe-event.c b/tools/perf/util/probe-event.c
index 29465d440043..c971e81e9cbf 100644
--- a/tools/perf/util/probe-event.c
+++ b/tools/perf/util/probe-event.c
@@ -37,6 +37,8 @@
#include "string.h"
#include "strlist.h"
#include "debug.h"
+#include "cache.h"
+#include "color.h"
#include "parse-events.h" /* For debugfs_path */
#include "probe-event.h"
@@ -62,6 +64,42 @@ static int e_snprintf(char *str, size_t size, const char *format, ...)
return ret;
}
+void parse_line_range_desc(const char *arg, struct line_range *lr)
+{
+ const char *ptr;
+ char *tmp;
+ /*
+ * <Syntax>
+ * SRC:SLN[+NUM|-ELN]
+ * FUNC[:SLN[+NUM|-ELN]]
+ */
+ ptr = strchr(arg, ':');
+ if (ptr) {
+ lr->start = (unsigned int)strtoul(ptr + 1, &tmp, 0);
+ if (*tmp == '+')
+ lr->end = lr->start + (unsigned int)strtoul(tmp + 1,
+ &tmp, 0);
+ else if (*tmp == '-')
+ lr->end = (unsigned int)strtoul(tmp + 1, &tmp, 0);
+ else
+ lr->end = 0;
+ pr_debug("Line range is %u to %u\n", lr->start, lr->end);
+ if (lr->end && lr->start > lr->end)
+ semantic_error("Start line must be smaller"
+ " than end line.");
+ if (*tmp != '\0')
+ semantic_error("Tailing with invalid character '%d'.",
+ *tmp);
+ tmp = strndup(arg, (ptr - arg));
+ } else
+ tmp = strdup(arg);
+
+ if (strchr(tmp, '.'))
+ lr->file = tmp;
+ else
+ lr->function = tmp;
+}
+
/* Check the name is good for event/group */
static bool check_event_name(const char *name)
{
@@ -81,14 +119,14 @@ static void parse_perf_probe_probepoint(char *arg, struct probe_point *pp)
char c, nc = 0;
/*
* <Syntax>
- * perf probe [EVENT=]SRC:LN
- * perf probe [EVENT=]FUNC[+OFFS|%return][@SRC]
+ * perf probe [EVENT=]SRC[:LN|;PTN]
+ * perf probe [EVENT=]FUNC[@SRC][+OFFS|%return|:LN|;PAT]
*
* TODO:Group name support
*/
- ptr = strchr(arg, '=');
- if (ptr) { /* Event name */
+ ptr = strpbrk(arg, ";=@+%");
+ if (ptr && *ptr == '=') { /* Event name */
*ptr = '\0';
tmp = ptr + 1;
ptr = strchr(arg, ':');
@@ -101,7 +139,7 @@ static void parse_perf_probe_probepoint(char *arg, struct probe_point *pp)
arg = tmp;
}
- ptr = strpbrk(arg, ":+@%");
+ ptr = strpbrk(arg, ";:+@%");
if (ptr) {
nc = *ptr;
*ptr++ = '\0';
@@ -118,7 +156,11 @@ static void parse_perf_probe_probepoint(char *arg, struct probe_point *pp)
while (ptr) {
arg = ptr;
c = nc;
- ptr = strpbrk(arg, ":+@%");
+ if (c == ';') { /* Lazy pattern must be the last part */
+ pp->lazy_line = strdup(arg);
+ break;
+ }
+ ptr = strpbrk(arg, ";:+@%");
if (ptr) {
nc = *ptr;
*ptr++ = '\0';
@@ -127,13 +169,13 @@ static void parse_perf_probe_probepoint(char *arg, struct probe_point *pp)
case ':': /* Line number */
pp->line = strtoul(arg, &tmp, 0);
if (*tmp != '\0')
- semantic_error("There is non-digit charactor"
- " in line number.");
+ semantic_error("There is non-digit char"
+ " in line number.");
break;
case '+': /* Byte offset from a symbol */
pp->offset = strtoul(arg, &tmp, 0);
if (*tmp != '\0')
- semantic_error("There is non-digit charactor"
+ semantic_error("There is non-digit character"
" in offset.");
break;
case '@': /* File name */
@@ -141,9 +183,6 @@ static void parse_perf_probe_probepoint(char *arg, struct probe_point *pp)
semantic_error("SRC@SRC is not allowed.");
pp->file = strdup(arg);
DIE_IF(pp->file == NULL);
- if (ptr)
- semantic_error("@SRC must be the last "
- "option.");
break;
case '%': /* Probe places */
if (strcmp(arg, "return") == 0) {
@@ -158,11 +197,18 @@ static void parse_perf_probe_probepoint(char *arg, struct probe_point *pp)
}
/* Exclusion check */
+ if (pp->lazy_line && pp->line)
+ semantic_error("Lazy pattern can't be used with line number.");
+
+ if (pp->lazy_line && pp->offset)
+ semantic_error("Lazy pattern can't be used with offset.");
+
if (pp->line && pp->offset)
semantic_error("Offset can't be used with line number.");
- if (!pp->line && pp->file && !pp->function)
- semantic_error("File always requires line number.");
+ if (!pp->line && !pp->lazy_line && pp->file && !pp->function)
+ semantic_error("File always requires line number or "
+ "lazy pattern.");
if (pp->offset && !pp->function)
semantic_error("Offset requires an entry function.");
@@ -170,11 +216,13 @@ static void parse_perf_probe_probepoint(char *arg, struct probe_point *pp)
if (pp->retprobe && !pp->function)
semantic_error("Return probe requires an entry function.");
- if ((pp->offset || pp->line) && pp->retprobe)
- semantic_error("Offset/Line can't be used with return probe.");
+ if ((pp->offset || pp->line || pp->lazy_line) && pp->retprobe)
+ semantic_error("Offset/Line/Lazy pattern can't be used with "
+ "return probe.");
- pr_debug("symbol:%s file:%s line:%d offset:%d, return:%d\n",
- pp->function, pp->file, pp->line, pp->offset, pp->retprobe);
+ pr_debug("symbol:%s file:%s line:%d offset:%d return:%d lazy:%s\n",
+ pp->function, pp->file, pp->line, pp->offset, pp->retprobe,
+ pp->lazy_line);
}
/* Parse perf-probe event definition */
@@ -272,6 +320,7 @@ int synthesize_perf_probe_point(struct probe_point *pp)
int ret;
pp->probes[0] = buf = zalloc(MAX_CMDLEN);
+ pp->found = 1;
if (!buf)
die("Failed to allocate memory by zalloc.");
if (pp->offset) {
@@ -294,6 +343,7 @@ int synthesize_perf_probe_point(struct probe_point *pp)
error:
free(pp->probes[0]);
pp->probes[0] = NULL;
+ pp->found = 0;
}
return ret;
}
@@ -368,7 +418,7 @@ static int open_kprobe_events(int flags, int mode)
if (ret < 0) {
if (errno == ENOENT)
die("kprobe_events file does not exist -"
- " please rebuild with CONFIG_KPROBE_TRACER.");
+ " please rebuild with CONFIG_KPROBE_EVENT.");
else
die("Could not open kprobe_events file: %s",
strerror(errno));
@@ -418,6 +468,8 @@ static void clear_probe_point(struct probe_point *pp)
free(pp->function);
if (pp->file)
free(pp->file);
+ if (pp->lazy_line)
+ free(pp->lazy_line);
for (i = 0; i < pp->nr_args; i++)
free(pp->args[i]);
if (pp->args)
@@ -455,6 +507,9 @@ void show_perf_probe_events(void)
struct strlist *rawlist;
struct str_node *ent;
+ setup_pager();
+
+ memset(&pp, 0, sizeof(pp));
fd = open_kprobe_events(O_RDONLY, 0);
rawlist = get_trace_kprobe_event_rawlist(fd);
close(fd);
@@ -675,3 +730,73 @@ void del_trace_kprobe_events(struct strlist *dellist)
close(fd);
}
+#define LINEBUF_SIZE 256
+#define NR_ADDITIONAL_LINES 2
+
+static void show_one_line(FILE *fp, unsigned int l, bool skip, bool show_num)
+{
+ char buf[LINEBUF_SIZE];
+ const char *color = PERF_COLOR_BLUE;
+
+ if (fgets(buf, LINEBUF_SIZE, fp) == NULL)
+ goto error;
+ if (!skip) {
+ if (show_num)
+ fprintf(stdout, "%7u %s", l, buf);
+ else
+ color_fprintf(stdout, color, " %s", buf);
+ }
+
+ while (strlen(buf) == LINEBUF_SIZE - 1 &&
+ buf[LINEBUF_SIZE - 2] != '\n') {
+ if (fgets(buf, LINEBUF_SIZE, fp) == NULL)
+ goto error;
+ if (!skip) {
+ if (show_num)
+ fprintf(stdout, "%s", buf);
+ else
+ color_fprintf(stdout, color, "%s", buf);
+ }
+ }
+ return;
+error:
+ if (feof(fp))
+ die("Source file is shorter than expected.");
+ else
+ die("File read error: %s", strerror(errno));
+}
+
+void show_line_range(struct line_range *lr)
+{
+ unsigned int l = 1;
+ struct line_node *ln;
+ FILE *fp;
+
+ setup_pager();
+
+ if (lr->function)
+ fprintf(stdout, "<%s:%d>\n", lr->function,
+ lr->start - lr->offset);
+ else
+ fprintf(stdout, "<%s:%d>\n", lr->file, lr->start);
+
+ fp = fopen(lr->path, "r");
+ if (fp == NULL)
+ die("Failed to open %s: %s", lr->path, strerror(errno));
+ /* Skip to starting line number */
+ while (l < lr->start)
+ show_one_line(fp, l++, true, false);
+
+ list_for_each_entry(ln, &lr->line_list, list) {
+ while (ln->line > l)
+ show_one_line(fp, (l++) - lr->offset, false, false);
+ show_one_line(fp, (l++) - lr->offset, false, true);
+ }
+
+ if (lr->end == INT_MAX)
+ lr->end = l + NR_ADDITIONAL_LINES;
+ while (l < lr->end && !feof(fp))
+ show_one_line(fp, (l++) - lr->offset, false, false);
+
+ fclose(fp);
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-19 02:48:24 +0100