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-rw-r--r--tools/lib/traceevent/event-parse.c113
-rw-r--r--tools/lib/traceevent/event-parse.h25
-rw-r--r--tools/lib/traceevent/event-plugin.c203
-rw-r--r--tools/lib/traceevent/plugin_function.c43
4 files changed, 374 insertions, 10 deletions
diff --git a/tools/lib/traceevent/event-parse.c b/tools/lib/traceevent/event-parse.c
index b83184f2d484..93825a17dcce 100644
--- a/tools/lib/traceevent/event-parse.c
+++ b/tools/lib/traceevent/event-parse.c
@@ -765,6 +765,9 @@ static void free_arg(struct print_arg *arg)
case PRINT_BSTRING:
free(arg->string.string);
break;
+ case PRINT_BITMASK:
+ free(arg->bitmask.bitmask);
+ break;
case PRINT_DYNAMIC_ARRAY:
free(arg->dynarray.index);
break;
@@ -2268,6 +2271,7 @@ static int arg_num_eval(struct print_arg *arg, long long *val)
case PRINT_FIELD ... PRINT_SYMBOL:
case PRINT_STRING:
case PRINT_BSTRING:
+ case PRINT_BITMASK:
default:
do_warning("invalid eval type %d", arg->type);
ret = 0;
@@ -2296,6 +2300,7 @@ static char *arg_eval (struct print_arg *arg)
case PRINT_FIELD ... PRINT_SYMBOL:
case PRINT_STRING:
case PRINT_BSTRING:
+ case PRINT_BITMASK:
default:
do_warning("invalid eval type %d", arg->type);
break;
@@ -2683,6 +2688,35 @@ process_str(struct event_format *event __maybe_unused, struct print_arg *arg,
return EVENT_ERROR;
}
+static enum event_type
+process_bitmask(struct event_format *event __maybe_unused, struct print_arg *arg,
+ char **tok)
+{
+ enum event_type type;
+ char *token;
+
+ if (read_expect_type(EVENT_ITEM, &token) < 0)
+ goto out_free;
+
+ arg->type = PRINT_BITMASK;
+ arg->bitmask.bitmask = token;
+ arg->bitmask.offset = -1;
+
+ if (read_expected(EVENT_DELIM, ")") < 0)
+ goto out_err;
+
+ type = read_token(&token);
+ *tok = token;
+
+ return type;
+
+ out_free:
+ free_token(token);
+ out_err:
+ *tok = NULL;
+ return EVENT_ERROR;
+}
+
static struct pevent_function_handler *
find_func_handler(struct pevent *pevent, char *func_name)
{
@@ -2797,6 +2831,10 @@ process_function(struct event_format *event, struct print_arg *arg,
free_token(token);
return process_str(event, arg, tok);
}
+ if (strcmp(token, "__get_bitmask") == 0) {
+ free_token(token);
+ return process_bitmask(event, arg, tok);
+ }
if (strcmp(token, "__get_dynamic_array") == 0) {
free_token(token);
return process_dynamic_array(event, arg, tok);
@@ -3324,6 +3362,7 @@ eval_num_arg(void *data, int size, struct event_format *event, struct print_arg
return eval_type(val, arg, 0);
case PRINT_STRING:
case PRINT_BSTRING:
+ case PRINT_BITMASK:
return 0;
case PRINT_FUNC: {
struct trace_seq s;
@@ -3556,6 +3595,60 @@ static void print_str_to_seq(struct trace_seq *s, const char *format,
trace_seq_printf(s, format, str);
}
+static void print_bitmask_to_seq(struct pevent *pevent,
+ struct trace_seq *s, const char *format,
+ int len_arg, const void *data, int size)
+{
+ int nr_bits = size * 8;
+ int str_size = (nr_bits + 3) / 4;
+ int len = 0;
+ char buf[3];
+ char *str;
+ int index;
+ int i;
+
+ /*
+ * The kernel likes to put in commas every 32 bits, we
+ * can do the same.
+ */
+ str_size += (nr_bits - 1) / 32;
+
+ str = malloc(str_size + 1);
+ if (!str) {
+ do_warning("%s: not enough memory!", __func__);
+ return;
+ }
+ str[str_size] = 0;
+
+ /* Start out with -2 for the two chars per byte */
+ for (i = str_size - 2; i >= 0; i -= 2) {
+ /*
+ * data points to a bit mask of size bytes.
+ * In the kernel, this is an array of long words, thus
+ * endianess is very important.
+ */
+ if (pevent->file_bigendian)
+ index = size - (len + 1);
+ else
+ index = len;
+
+ snprintf(buf, 3, "%02x", *((unsigned char *)data + index));
+ memcpy(str + i, buf, 2);
+ len++;
+ if (!(len & 3) && i > 0) {
+ i--;
+ str[i] = ',';
+ }
+ }
+
+ if (len_arg >= 0)
+ trace_seq_printf(s, format, len_arg, str);
+ else
+ trace_seq_printf(s, format, str);
+
+ free(str);
+}
+
static void print_str_arg(struct trace_seq *s, void *data, int size,
struct event_format *event, const char *format,
int len_arg, struct print_arg *arg)
@@ -3691,6 +3784,23 @@ static void print_str_arg(struct trace_seq *s, void *data, int size,
case PRINT_BSTRING:
print_str_to_seq(s, format, len_arg, arg->string.string);
break;
+ case PRINT_BITMASK: {
+ int bitmask_offset;
+ int bitmask_size;
+
+ if (arg->bitmask.offset == -1) {
+ struct format_field *f;
+
+ f = pevent_find_any_field(event, arg->bitmask.bitmask);
+ arg->bitmask.offset = f->offset;
+ }
+ bitmask_offset = data2host4(pevent, data + arg->bitmask.offset);
+ bitmask_size = bitmask_offset >> 16;
+ bitmask_offset &= 0xffff;
+ print_bitmask_to_seq(pevent, s, format, len_arg,
+ data + bitmask_offset, bitmask_size);
+ break;
+ }
case PRINT_OP:
/*
* The only op for string should be ? :
@@ -4822,6 +4932,9 @@ static void print_args(struct print_arg *args)
case PRINT_BSTRING:
printf("__get_str(%s)", args->string.string);
break;
+ case PRINT_BITMASK:
+ printf("__get_bitmask(%s)", args->bitmask.bitmask);
+ break;
case PRINT_TYPE:
printf("(%s)", args->typecast.type);
print_args(args->typecast.item);
diff --git a/tools/lib/traceevent/event-parse.h b/tools/lib/traceevent/event-parse.h
index feab94281634..7a3873ff9a4f 100644
--- a/tools/lib/traceevent/event-parse.h
+++ b/tools/lib/traceevent/event-parse.h
@@ -107,8 +107,8 @@ typedef int (*pevent_event_handler_func)(struct trace_seq *s,
typedef int (*pevent_plugin_load_func)(struct pevent *pevent);
typedef int (*pevent_plugin_unload_func)(struct pevent *pevent);
-struct plugin_option {
- struct plugin_option *next;
+struct pevent_plugin_option {
+ struct pevent_plugin_option *next;
void *handle;
char *file;
char *name;
@@ -135,7 +135,7 @@ struct plugin_option {
* PEVENT_PLUGIN_OPTIONS: (optional)
* Plugin options that can be set before loading
*
- * struct plugin_option PEVENT_PLUGIN_OPTIONS[] = {
+ * struct pevent_plugin_option PEVENT_PLUGIN_OPTIONS[] = {
* {
* .name = "option-name",
* .plugin_alias = "overide-file-name", (optional)
@@ -208,6 +208,11 @@ struct print_arg_string {
int offset;
};
+struct print_arg_bitmask {
+ char *bitmask;
+ int offset;
+};
+
struct print_arg_field {
char *name;
struct format_field *field;
@@ -274,6 +279,7 @@ enum print_arg_type {
PRINT_DYNAMIC_ARRAY,
PRINT_OP,
PRINT_FUNC,
+ PRINT_BITMASK,
};
struct print_arg {
@@ -288,6 +294,7 @@ struct print_arg {
struct print_arg_hex hex;
struct print_arg_func func;
struct print_arg_string string;
+ struct print_arg_bitmask bitmask;
struct print_arg_op op;
struct print_arg_dynarray dynarray;
};
@@ -354,6 +361,8 @@ enum pevent_func_arg_type {
enum pevent_flag {
PEVENT_NSEC_OUTPUT = 1, /* output in NSECS */
+ PEVENT_DISABLE_SYS_PLUGINS = 1 << 1,
+ PEVENT_DISABLE_PLUGINS = 1 << 2,
};
#define PEVENT_ERRORS \
@@ -410,9 +419,19 @@ enum pevent_errno {
struct plugin_list;
+#define INVALID_PLUGIN_LIST_OPTION ((char **)((unsigned long)-1))
+
struct plugin_list *traceevent_load_plugins(struct pevent *pevent);
void traceevent_unload_plugins(struct plugin_list *plugin_list,
struct pevent *pevent);
+char **traceevent_plugin_list_options(void);
+void traceevent_plugin_free_options_list(char **list);
+int traceevent_plugin_add_options(const char *name,
+ struct pevent_plugin_option *options);
+void traceevent_plugin_remove_options(struct pevent_plugin_option *options);
+void traceevent_print_plugins(struct trace_seq *s,
+ const char *prefix, const char *suffix,
+ const struct plugin_list *list);
struct cmdline;
struct cmdline_list;
diff --git a/tools/lib/traceevent/event-plugin.c b/tools/lib/traceevent/event-plugin.c
index 0c8bf6780e4d..136162c03af1 100644
--- a/tools/lib/traceevent/event-plugin.c
+++ b/tools/lib/traceevent/event-plugin.c
@@ -18,6 +18,7 @@
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
*/
+#include <stdio.h>
#include <string.h>
#include <dlfcn.h>
#include <stdlib.h>
@@ -30,12 +31,207 @@
#define LOCAL_PLUGIN_DIR ".traceevent/plugins"
+static struct registered_plugin_options {
+ struct registered_plugin_options *next;
+ struct pevent_plugin_option *options;
+} *registered_options;
+
+static struct trace_plugin_options {
+ struct trace_plugin_options *next;
+ char *plugin;
+ char *option;
+ char *value;
+} *trace_plugin_options;
+
struct plugin_list {
struct plugin_list *next;
char *name;
void *handle;
};
+/**
+ * traceevent_plugin_list_options - get list of plugin options
+ *
+ * Returns an array of char strings that list the currently registered
+ * plugin options in the format of <plugin>:<option>. This list can be
+ * used by toggling the option.
+ *
+ * Returns NULL if there's no options registered. On error it returns
+ * INVALID_PLUGIN_LIST_OPTION
+ *
+ * Must be freed with traceevent_plugin_free_options_list().
+ */
+char **traceevent_plugin_list_options(void)
+{
+ struct registered_plugin_options *reg;
+ struct pevent_plugin_option *op;
+ char **list = NULL;
+ char *name;
+ int count = 0;
+
+ for (reg = registered_options; reg; reg = reg->next) {
+ for (op = reg->options; op->name; op++) {
+ char *alias = op->plugin_alias ? op->plugin_alias : op->file;
+ char **temp = list;
+
+ name = malloc(strlen(op->name) + strlen(alias) + 2);
+ if (!name)
+ goto err;
+
+ sprintf(name, "%s:%s", alias, op->name);
+ list = realloc(list, count + 2);
+ if (!list) {
+ list = temp;
+ free(name);
+ goto err;
+ }
+ list[count++] = name;
+ list[count] = NULL;
+ }
+ }
+ return list;
+
+ err:
+ while (--count >= 0)
+ free(list[count]);
+ free(list);
+
+ return INVALID_PLUGIN_LIST_OPTION;
+}
+
+void traceevent_plugin_free_options_list(char **list)
+{
+ int i;
+
+ if (!list)
+ return;
+
+ if (list == INVALID_PLUGIN_LIST_OPTION)
+ return;
+
+ for (i = 0; list[i]; i++)
+ free(list[i]);
+
+ free(list);
+}
+
+static int
+update_option(const char *file, struct pevent_plugin_option *option)
+{
+ struct trace_plugin_options *op;
+ char *plugin;
+
+ if (option->plugin_alias) {
+ plugin = strdup(option->plugin_alias);
+ if (!plugin)
+ return -1;
+ } else {
+ char *p;
+ plugin = strdup(file);
+ if (!plugin)
+ return -1;
+ p = strstr(plugin, ".");
+ if (p)
+ *p = '\0';
+ }
+
+ /* first look for named options */
+ for (op = trace_plugin_options; op; op = op->next) {
+ if (!op->plugin)
+ continue;
+ if (strcmp(op->plugin, plugin) != 0)
+ continue;
+ if (strcmp(op->option, option->name) != 0)
+ continue;
+
+ option->value = op->value;
+ option->set ^= 1;
+ goto out;
+ }
+
+ /* first look for unnamed options */
+ for (op = trace_plugin_options; op; op = op->next) {
+ if (op->plugin)
+ continue;
+ if (strcmp(op->option, option->name) != 0)
+ continue;
+
+ option->value = op->value;
+ option->set ^= 1;
+ break;
+ }
+
+ out:
+ free(plugin);
+ return 0;
+}
+
+/**
+ * traceevent_plugin_add_options - Add a set of options by a plugin
+ * @name: The name of the plugin adding the options
+ * @options: The set of options being loaded
+ *
+ * Sets the options with the values that have been added by user.
+ */
+int traceevent_plugin_add_options(const char *name,
+ struct pevent_plugin_option *options)
+{
+ struct registered_plugin_options *reg;
+
+ reg = malloc(sizeof(*reg));
+ if (!reg)
+ return -1;
+ reg->next = registered_options;
+ reg->options = options;
+ registered_options = reg;
+
+ while (options->name) {
+ update_option(name, options);
+ options++;
+ }
+ return 0;
+}
+
+/**
+ * traceevent_plugin_remove_options - remove plugin options that were registered
+ * @options: Options to removed that were registered with traceevent_plugin_add_options
+ */
+void traceevent_plugin_remove_options(struct pevent_plugin_option *options)
+{
+ struct registered_plugin_options **last;
+ struct registered_plugin_options *reg;
+
+ for (last = &registered_options; *last; last = &(*last)->next) {
+ if ((*last)->options == options) {
+ reg = *last;
+ *last = reg->next;
+ free(reg);
+ return;
+ }
+ }
+}
+
+/**
+ * traceevent_print_plugins - print out the list of plugins loaded
+ * @s: the trace_seq descripter to write to
+ * @prefix: The prefix string to add before listing the option name
+ * @suffix: The suffix string ot append after the option name
+ * @list: The list of plugins (usually returned by traceevent_load_plugins()
+ *
+ * Writes to the trace_seq @s the list of plugins (files) that is
+ * returned by traceevent_load_plugins(). Use @prefix and @suffix for formating:
+ * @prefix = " ", @suffix = "\n".
+ */
+void traceevent_print_plugins(struct trace_seq *s,
+ const char *prefix, const char *suffix,
+ const struct plugin_list *list)
+{
+ while (list) {
+ trace_seq_printf(s, "%s%s%s", prefix, list->name, suffix);
+ list = list->next;
+ }
+}
+
static void
load_plugin(struct pevent *pevent, const char *path,
const char *file, void *data)
@@ -148,12 +344,17 @@ load_plugins(struct pevent *pevent, const char *suffix,
char *path;
char *envdir;
+ if (pevent->flags & PEVENT_DISABLE_PLUGINS)
+ return;
+
/*
* If a system plugin directory was defined,
* check that first.
*/
#ifdef PLUGIN_DIR
- load_plugins_dir(pevent, suffix, PLUGIN_DIR, load_plugin, data);
+ if (!(pevent->flags & PEVENT_DISABLE_SYS_PLUGINS))
+ load_plugins_dir(pevent, suffix, PLUGIN_DIR,
+ load_plugin, data);
#endif
/*
diff --git a/tools/lib/traceevent/plugin_function.c b/tools/lib/traceevent/plugin_function.c
index 80ba4ff1fe84..a00ec190821a 100644
--- a/tools/lib/traceevent/plugin_function.c
+++ b/tools/lib/traceevent/plugin_function.c
@@ -33,6 +33,29 @@ static int cpus = -1;
#define STK_BLK 10
+struct pevent_plugin_option plugin_options[] =
+{
+ {
+ .name = "parent",
+ .plugin_alias = "ftrace",
+ .description =
+ "Print parent of functions for function events",
+ },
+ {
+ .name = "indent",
+ .plugin_alias = "ftrace",
+ .description =
+ "Try to show function call indents, based on parents",
+ .set = 1,
+ },
+ {
+ .name = NULL,
+ }
+};
+
+static struct pevent_plugin_option *ftrace_parent = &plugin_options[0];
+static struct pevent_plugin_option *ftrace_indent = &plugin_options[1];
+
static void add_child(struct func_stack *stack, const char *child, int pos)
{
int i;
@@ -119,7 +142,8 @@ static int function_handler(struct trace_seq *s, struct pevent_record *record,
parent = pevent_find_function(pevent, pfunction);
- index = add_and_get_index(parent, func, record->cpu);
+ if (parent && ftrace_indent->set)
+ index = add_and_get_index(parent, func, record->cpu);
trace_seq_printf(s, "%*s", index*3, "");
@@ -128,11 +152,13 @@ static int function_handler(struct trace_seq *s, struct pevent_record *record,
else
trace_seq_printf(s, "0x%llx", function);
- trace_seq_printf(s, " <-- ");
- if (parent)
- trace_seq_printf(s, "%s", parent);
- else
- trace_seq_printf(s, "0x%llx", pfunction);
+ if (ftrace_parent->set) {
+ trace_seq_printf(s, " <-- ");
+ if (parent)
+ trace_seq_printf(s, "%s", parent);
+ else
+ trace_seq_printf(s, "0x%llx", pfunction);
+ }
return 0;
}
@@ -141,6 +167,9 @@ int PEVENT_PLUGIN_LOADER(struct pevent *pevent)
{
pevent_register_event_handler(pevent, -1, "ftrace", "function",
function_handler, NULL);
+
+ traceevent_plugin_add_options("ftrace", plugin_options);
+
return 0;
}
@@ -157,6 +186,8 @@ void PEVENT_PLUGIN_UNLOADER(struct pevent *pevent)
free(fstack[i].stack);
}
+ traceevent_plugin_remove_options(plugin_options);
+
free(fstack);
fstack = NULL;
cpus = -1;
generated by cgit v1.2.3 (git 2.39.0) at 2024-12-24 13:57:31 +0300