perf tools: Fix backslash processing on trace print formats
The handling of backslashes was broken. It would stop parsing
when encountering one. Also, '\n', '\t', '\r' and '\\' were not
converted.
Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
LKML-Reference: <20091014194357.521974680@goodmis.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/tools/perf/util/trace-event-parse.c b/tools/perf/util/trace-event-parse.c
index a05c714..2b75ec2 100644
--- a/tools/perf/util/trace-event-parse.c
+++ b/tools/perf/util/trace-event-parse.c
@@ -522,7 +522,10 @@
last_ch = ch;
ch = __read_char();
buf[i++] = ch;
- } while (ch != quote_ch && last_ch != '\\');
+ /* the '\' '\' will cancel itself */
+ if (ch == '\\' && last_ch == '\\')
+ last_ch = 0;
+ } while (ch != quote_ch || last_ch == '\\');
/* remove the last quote */
i--;
goto out;
@@ -2325,7 +2328,27 @@
for (; *ptr; ptr++) {
ls = 0;
- if (*ptr == '%') {
+ if (*ptr == '\\') {
+ ptr++;
+ switch (*ptr) {
+ case 'n':
+ printf("\n");
+ break;
+ case 't':
+ printf("\t");
+ break;
+ case 'r':
+ printf("\r");
+ break;
+ case '\\':
+ printf("\\");
+ break;
+ default:
+ printf("%c", *ptr);
+ break;
+ }
+
+ } else if (*ptr == '%') {
saveptr = ptr;
show_func = 0;
cont_process: