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perf probe: Don't always consider EOF as an error when listing source code 

When listing a whole file or a function which is located at the end,
perf-probe -L output wrongly: "Source file is shorter than expected.".

This is because show_one_line() always consider EOF as an error.

This patch fixes this by not considering EOF as an error when dumping
the trailing lines. Otherwise it's still an error and perf-probe still
outputs its warning.

Acked-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
LKML-Reference: <1292854685-8230-6-git-send-email-fbuihuu@gmail.com>
Signed-off-by: Franck Bui-Huu <fbuihuu@gmail.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
wifi-calibration
Franck Bui-Huu 2010-12-20 15:18:04 +01:00 committed by Arnaldo Carvalho de Melo
parent 9d95b580a8
commit fde52dbd7f
1 changed files with 27 additions and 13 deletions
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40
tools/perf/util/probe-event.c
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@ -287,7 +287,7 @@ static int get_real_path(const char *raw_path, const char *comp_dir,
#define LINEBUF_SIZE 256
#define NR_ADDITIONAL_LINES 2
static int show_one_line(FILE *fp, int l, bool skip, bool show_num)
static int __show_one_line(FILE *fp, int l, bool skip, bool show_num)
{
char buf[LINEBUF_SIZE];
const char *color = show_num ? "" : PERF_COLOR_BLUE;
@ -306,16 +306,30 @@ static int show_one_line(FILE *fp, int l, bool skip, bool show_num)
} while (strchr(buf, '\n') == NULL);
return 0;
return 1;
error:
if (feof(fp))
if (ferror(fp)) {
pr_warning("Source file is shorter than expected.\n");
else
pr_warning("File read error: %s\n", strerror(errno));
return -1;
return -1;
}
return 0;
}
static int _show_one_line(FILE *fp, int l, bool skip, bool show_num)
{
int rv = __show_one_line(fp, l, skip, show_num);
if (rv == 0) {
pr_warning("Source file is shorter than expected.\n");
rv = -1;
}
return rv;
}
#define show_one_line_with_num(f,l) _show_one_line(f,l,false,true)
#define show_one_line(f,l) _show_one_line(f,l,false,false)
#define skip_one_line(f,l) _show_one_line(f,l,true,false)
#define show_one_line_or_eof(f,l) __show_one_line(f,l,false,false)
/*
* Show line-range always requires debuginfo to find source file and
* line number.
@ -374,27 +388,27 @@ int show_line_range(struct line_range *lr, const char *module)
}
/* Skip to starting line number */
while (l < lr->start) {
ret = show_one_line(fp, l++, true, false);
ret = skip_one_line(fp, l++);
if (ret < 0)
goto end;
}
list_for_each_entry(ln, &lr->line_list, list) {
for (; ln->line > l; l++) {
ret = show_one_line(fp, l - lr->offset, false, false);
ret = show_one_line(fp, l - lr->offset);
if (ret < 0)
goto end;
}
ret = show_one_line(fp, l++ - lr->offset, false, true);
ret = show_one_line_with_num(fp, l++ - lr->offset);
if (ret < 0)
goto end;
}
if (lr->end == INT_MAX)
lr->end = l + NR_ADDITIONAL_LINES;
while (l <= lr->end && !feof(fp)) {
ret = show_one_line(fp, l++ - lr->offset, false, false);
if (ret < 0)
while (l <= lr->end) {
ret = show_one_line_or_eof(fp, l++ - lr->offset);
if (ret <= 0)
break;
}
end: