[PATCH 29/29] tools lib traceevent: Add pevent_print_func_field() helper function
From: Steven Rostedt
Add the pevent_print_func_field() that will look up a field that is
expected to be a function pointer, and it will print the function name
and offset of the address given by the field.
Signed-off-by: Steven Rostedt
Cc: Andrew Morton
Cc: Frederic Weisbecker
Cc: Ingo Molnar
Cc: Namhyung Kim
Link: http://lkml.kernel.org/r/20131101215501.869542...@goodmis.org
Signed-off-by: Arnaldo Carvalho de Melo
---
tools/lib/traceevent/event-parse.c | 42 ++
tools/lib/traceevent/event-parse.h | 4
2 files changed, 46 insertions(+)
diff --git a/tools/lib/traceevent/event-parse.c
b/tools/lib/traceevent/event-parse.c
index fc6f35f591f6..8f450adaa9c2 100644
--- a/tools/lib/traceevent/event-parse.c
+++ b/tools/lib/traceevent/event-parse.c
@@ -5367,6 +5367,48 @@ int pevent_print_num_field(struct trace_seq *s, const
char *fmt,
return -1;
}
+/**
+ * pevent_print_func_field - print a field and a format for function pointers
+ * @s: The seq to print to
+ * @fmt: The printf format to print the field with.
+ * @event: the event that the field is for
+ * @name: The name of the field
+ * @record: The record with the field name.
+ * @err: print default error if failed.
+ *
+ * Returns: 0 on success, -1 field not found, or 1 if buffer is full.
+ */
+int pevent_print_func_field(struct trace_seq *s, const char *fmt,
+ struct event_format *event, const char *name,
+ struct pevent_record *record, int err)
+{
+ struct format_field *field = pevent_find_field(event, name);
+ struct pevent *pevent = event->pevent;
+ unsigned long long val;
+ struct func_map *func;
+ char tmp[128];
+
+ if (!field)
+ goto failed;
+
+ if (pevent_read_number_field(field, record->data, ))
+ goto failed;
+
+ func = find_func(pevent, val);
+
+ if (func)
+ snprintf(tmp, 128, "%s/0x%llx", func->func, func->addr - val);
+ else
+ sprintf(tmp, "0x%08llx", val);
+
+ return trace_seq_printf(s, fmt, tmp);
+
+ failed:
+ if (err)
+ trace_seq_printf(s, "CAN'T FIND FIELD \"%s\"", name);
+ return -1;
+}
+
static void free_func_handle(struct pevent_function_handler *func)
{
struct pevent_func_params *params;
diff --git a/tools/lib/traceevent/event-parse.h
b/tools/lib/traceevent/event-parse.h
index dc8539ee9485..8d73d2594f65 100644
--- a/tools/lib/traceevent/event-parse.h
+++ b/tools/lib/traceevent/event-parse.h
@@ -569,6 +569,10 @@ int pevent_print_num_field(struct trace_seq *s, const char
*fmt,
struct event_format *event, const char *name,
struct pevent_record *record, int err);
+int pevent_print_func_field(struct trace_seq *s, const char *fmt,
+ struct event_format *event, const char *name,
+ struct pevent_record *record, int err);
+
int pevent_register_event_handler(struct pevent *pevent, int id,
const char *sys_name, const char *event_name,
pevent_event_handler_func func, void
*context);
--
1.8.1.4
--
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[PATCH 29/29] tools lib traceevent: Add pevent_print_func_field() helper function
From: Steven Rostedt srost...@redhat.com
Add the pevent_print_func_field() that will look up a field that is
expected to be a function pointer, and it will print the function name
and offset of the address given by the field.
Signed-off-by: Steven Rostedt rost...@goodmis.org
Cc: Andrew Morton a...@linux-foundation.org
Cc: Frederic Weisbecker fweis...@gmail.com
Cc: Ingo Molnar mi...@kernel.org
Cc: Namhyung Kim namhy...@kernel.org
Link: http://lkml.kernel.org/r/20131101215501.869542...@goodmis.org
Signed-off-by: Arnaldo Carvalho de Melo a...@redhat.com
---
tools/lib/traceevent/event-parse.c | 42 ++
tools/lib/traceevent/event-parse.h | 4
2 files changed, 46 insertions(+)
diff --git a/tools/lib/traceevent/event-parse.c
b/tools/lib/traceevent/event-parse.c
index fc6f35f591f6..8f450adaa9c2 100644
--- a/tools/lib/traceevent/event-parse.c
+++ b/tools/lib/traceevent/event-parse.c
@@ -5367,6 +5367,48 @@ int pevent_print_num_field(struct trace_seq *s, const
char *fmt,
return -1;
}
+/**
+ * pevent_print_func_field - print a field and a format for function pointers
+ * @s: The seq to print to
+ * @fmt: The printf format to print the field with.
+ * @event: the event that the field is for
+ * @name: The name of the field
+ * @record: The record with the field name.
+ * @err: print default error if failed.
+ *
+ * Returns: 0 on success, -1 field not found, or 1 if buffer is full.
+ */
+int pevent_print_func_field(struct trace_seq *s, const char *fmt,
+ struct event_format *event, const char *name,
+ struct pevent_record *record, int err)
+{
+ struct format_field *field = pevent_find_field(event, name);
+ struct pevent *pevent = event-pevent;
+ unsigned long long val;
+ struct func_map *func;
+ char tmp[128];
+
+ if (!field)
+ goto failed;
+
+ if (pevent_read_number_field(field, record-data, val))
+ goto failed;
+
+ func = find_func(pevent, val);
+
+ if (func)
+ snprintf(tmp, 128, %s/0x%llx, func-func, func-addr - val);
+ else
+ sprintf(tmp, 0x%08llx, val);
+
+ return trace_seq_printf(s, fmt, tmp);
+
+ failed:
+ if (err)
+ trace_seq_printf(s, CAN'T FIND FIELD \%s\, name);
+ return -1;
+}
+
static void free_func_handle(struct pevent_function_handler *func)
{
struct pevent_func_params *params;
diff --git a/tools/lib/traceevent/event-parse.h
b/tools/lib/traceevent/event-parse.h
index dc8539ee9485..8d73d2594f65 100644
--- a/tools/lib/traceevent/event-parse.h
+++ b/tools/lib/traceevent/event-parse.h
@@ -569,6 +569,10 @@ int pevent_print_num_field(struct trace_seq *s, const char
*fmt,
struct event_format *event, const char *name,
struct pevent_record *record, int err);
+int pevent_print_func_field(struct trace_seq *s, const char *fmt,
+ struct event_format *event, const char *name,
+ struct pevent_record *record, int err);
+
int pevent_register_event_handler(struct pevent *pevent, int id,
const char *sys_name, const char *event_name,
pevent_event_handler_func func, void
*context);
--
1.8.1.4
--
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the body of a message to majord...@vger.kernel.org
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Please read the FAQ at http://www.tux.org/lkml/
