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authorAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-12-15 14:52:16 -0300
committerAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-12-15 14:52:16 -0300
commit8d91c1e411f55d7ea91b1183a2e9f8088fb4d5be (patch)
treee9891aa6c295060d065adffd610c4f49ecf884f3 /tools/lib/traceevent
parenta71852147516bc1cb5b0b3cbd13639bfd4022dc8 (diff)
Linux-libre 4.3.2-gnu
Diffstat (limited to 'tools/lib/traceevent')
-rw-r--r--tools/lib/traceevent/event-parse.c78
-rw-r--r--tools/lib/traceevent/event-parse.h8
2 files changed, 85 insertions, 1 deletions
diff --git a/tools/lib/traceevent/event-parse.c b/tools/lib/traceevent/event-parse.c
index a843bee66..cf42b0904 100644
--- a/tools/lib/traceevent/event-parse.c
+++ b/tools/lib/traceevent/event-parse.c
@@ -418,7 +418,7 @@ static int func_map_init(struct pevent *pevent)
}
static struct func_map *
-find_func(struct pevent *pevent, unsigned long long addr)
+__find_func(struct pevent *pevent, unsigned long long addr)
{
struct func_map *func;
struct func_map key;
@@ -434,6 +434,71 @@ find_func(struct pevent *pevent, unsigned long long addr)
return func;
}
+struct func_resolver {
+ pevent_func_resolver_t *func;
+ void *priv;
+ struct func_map map;
+};
+
+/**
+ * pevent_set_function_resolver - set an alternative function resolver
+ * @pevent: handle for the pevent
+ * @resolver: function to be used
+ * @priv: resolver function private state.
+ *
+ * Some tools may have already a way to resolve kernel functions, allow them to
+ * keep using it instead of duplicating all the entries inside
+ * pevent->funclist.
+ */
+int pevent_set_function_resolver(struct pevent *pevent,
+ pevent_func_resolver_t *func, void *priv)
+{
+ struct func_resolver *resolver = malloc(sizeof(*resolver));
+
+ if (resolver == NULL)
+ return -1;
+
+ resolver->func = func;
+ resolver->priv = priv;
+
+ free(pevent->func_resolver);
+ pevent->func_resolver = resolver;
+
+ return 0;
+}
+
+/**
+ * pevent_reset_function_resolver - reset alternative function resolver
+ * @pevent: handle for the pevent
+ *
+ * Stop using whatever alternative resolver was set, use the default
+ * one instead.
+ */
+void pevent_reset_function_resolver(struct pevent *pevent)
+{
+ free(pevent->func_resolver);
+ pevent->func_resolver = NULL;
+}
+
+static struct func_map *
+find_func(struct pevent *pevent, unsigned long long addr)
+{
+ struct func_map *map;
+
+ if (!pevent->func_resolver)
+ return __find_func(pevent, addr);
+
+ map = &pevent->func_resolver->map;
+ map->mod = NULL;
+ map->addr = addr;
+ map->func = pevent->func_resolver->func(pevent->func_resolver->priv,
+ &map->addr, &map->mod);
+ if (map->func == NULL)
+ return NULL;
+
+ return map;
+}
+
/**
* pevent_find_function - find a function by a given address
* @pevent: handle for the pevent
@@ -1680,6 +1745,9 @@ process_cond(struct event_format *event, struct print_arg *top, char **tok)
type = process_arg(event, left, &token);
again:
+ if (type == EVENT_ERROR)
+ goto out_free;
+
/* Handle other operations in the arguments */
if (type == EVENT_OP && strcmp(token, ":") != 0) {
type = process_op(event, left, &token);
@@ -1939,6 +2007,12 @@ process_op(struct event_format *event, struct print_arg *arg, char **tok)
goto out_warn_free;
type = process_arg_token(event, right, tok, type);
+ if (type == EVENT_ERROR) {
+ free_arg(right);
+ /* token was freed in process_arg_token() via *tok */
+ token = NULL;
+ goto out_free;
+ }
if (right->type == PRINT_OP &&
get_op_prio(arg->op.op) < get_op_prio(right->op.op)) {
@@ -4771,6 +4845,7 @@ static void pretty_print(struct trace_seq *s, void *data, int size, struct event
case 'z':
case 'Z':
case '0' ... '9':
+ case '-':
goto cont_process;
case 'p':
if (pevent->long_size == 4)
@@ -6581,6 +6656,7 @@ void pevent_free(struct pevent *pevent)
free(pevent->trace_clock);
free(pevent->events);
free(pevent->sort_events);
+ free(pevent->func_resolver);
free(pevent);
}
diff --git a/tools/lib/traceevent/event-parse.h b/tools/lib/traceevent/event-parse.h
index 063b1971e..204befb05 100644
--- a/tools/lib/traceevent/event-parse.h
+++ b/tools/lib/traceevent/event-parse.h
@@ -453,6 +453,10 @@ struct cmdline_list;
struct func_map;
struct func_list;
struct event_handler;
+struct func_resolver;
+
+typedef char *(pevent_func_resolver_t)(void *priv,
+ unsigned long long *addrp, char **modp);
struct pevent {
int ref_count;
@@ -481,6 +485,7 @@ struct pevent {
int cmdline_count;
struct func_map *func_map;
+ struct func_resolver *func_resolver;
struct func_list *funclist;
unsigned int func_count;
@@ -611,6 +616,9 @@ enum trace_flag_type {
TRACE_FLAG_SOFTIRQ = 0x10,
};
+int pevent_set_function_resolver(struct pevent *pevent,
+ pevent_func_resolver_t *func, void *priv);
+void pevent_reset_function_resolver(struct pevent *pevent);
int pevent_register_comm(struct pevent *pevent, const char *comm, int pid);
int pevent_register_trace_clock(struct pevent *pevent, const char *trace_clock);
int pevent_register_function(struct pevent *pevent, char *name,