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Subject[PATCH 3/6] perf, tool: Add support for displaying event parser debug info
Date
Adding PARSER_DEBUG Makefile variable to enable building event
scanner/parser with debug enabled. This results in verbose
output right out of the scanner/parser.

It's usefull for debuging the event parser. Keeping this only
for event parser so far.

Signed-off-by: Jiri Olsa <jolsa@redhat.com>
---
tools/perf/Makefile | 12 +++++++++---
tools/perf/util/parse-events.c | 6 ++++++
2 files changed, 15 insertions(+), 3 deletions(-)
diff --git a/tools/perf/Makefile b/tools/perf/Makefile
index 5f5bc9c..56f58ea 100644
--- a/tools/perf/Makefile
+++ b/tools/perf/Makefile
@@ -83,7 +83,13 @@ ifndef PERF_DEBUG
CFLAGS_OPTIMIZE = -O6
endif

-CFLAGS = -fno-omit-frame-pointer -ggdb3 -Wall -Wextra -std=gnu99 $(CFLAGS_WERROR) $(CFLAGS_OPTIMIZE) -D_FORTIFY_SOURCE=2 $(EXTRA_WARNINGS) $(EXTRA_CFLAGS)
+ifdef PARSER_DEBUG
+ PARSER_DEBUG_BISON := -t
+ PARSER_DEBUG_FLEX := -d
+ PARSER_DEBUG_CFLAGS := -DPARSER_DEBUG
+endif
+
+CFLAGS = -fno-omit-frame-pointer -ggdb3 -Wall -Wextra -std=gnu99 $(CFLAGS_WERROR) $(CFLAGS_OPTIMIZE) -D_FORTIFY_SOURCE=2 $(EXTRA_WARNINGS) $(EXTRA_CFLAGS) $(PARSER_DEBUG_CFLAGS)
EXTLIBS = -lpthread -lrt -lelf -lm
ALL_CFLAGS = $(CFLAGS) -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -D_GNU_SOURCE
ALL_LDFLAGS = $(LDFLAGS)
@@ -205,10 +211,10 @@ FLEX = $(CROSS_COMPILE)flex
BISON= $(CROSS_COMPILE)bison

$(OUTPUT)util/parse-events-flex.c: util/parse-events.l
- $(QUIET_FLEX)$(FLEX) --header-file=$(OUTPUT)util/parse-events-flex.h -t util/parse-events.l > $(OUTPUT)util/parse-events-flex.c
+ $(QUIET_FLEX)$(FLEX) --header-file=$(OUTPUT)util/parse-events-flex.h $(PARSER_DEBUG_FLEX) -t util/parse-events.l > $(OUTPUT)util/parse-events-flex.c

$(OUTPUT)util/parse-events-bison.c: util/parse-events.y
- $(QUIET_BISON)$(BISON) -v util/parse-events.y -d -o $(OUTPUT)util/parse-events-bison.c
+ $(QUIET_BISON)$(BISON) -v util/parse-events.y -d $(PARSER_DEBUG_BISON) -o $(OUTPUT)util/parse-events-bison.c

$(OUTPUT)util/pmu-flex.c: util/pmu.l
$(QUIET_FLEX)$(FLEX) --header-file=$(OUTPUT)util/pmu-flex.h -t util/pmu.l > $(OUTPUT)util/pmu-flex.c
diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c
index c7fc18a..6704978 100644
--- a/tools/perf/util/parse-events.c
+++ b/tools/perf/util/parse-events.c
@@ -23,6 +23,9 @@ struct event_symbol {
const char *alias;
};

+#ifdef PARSER_DEBUG
+extern int parse_events_debug;
+#endif
int parse_events_parse(struct list_head *list, struct list_head *list_tmp,
int *idx);

@@ -768,6 +771,9 @@ int parse_events(struct perf_evlist *evlist, const char *str, int unset __used)

buffer = parse_events__scan_string(str);

+#ifdef PARSER_DEBUG
+ parse_events_debug = 1;
+#endif
ret = parse_events_parse(&list, &list_tmp, &idx);

parse_events__flush_buffer(buffer);
--
1.7.7.6


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