Commit-ID: 76055940c1afc8d445992fb0278b80cf205bbf97 Gitweb: http://git.kernel.org/tip/76055940c1afc8d445992fb0278b80cf205bbf97 Author: He Kuang <heku...@huawei.com> AuthorDate: Sat, 29 Aug 2015 04:22:05 +0000 Committer: Arnaldo Carvalho de Melo <a...@redhat.com> CommitDate: Wed, 2 Sep 2015 16:30:46 -0300
tools lib traceevent: Support function __get_dynamic_array_len Support helper function __get_dynamic_array_len() in libtraceevent, this function is used accompany with __print_array() or __print_hex(), but currently it is not an available function in the function list of process_function(). The total allocated length of the dynamic array is embedded in the top half of __data_loc_##item field. This patch adds new arg type PRINT_DYNAMIC_ARRAY_LEN to return the length to eval_num_arg(), Signed-off-by: He Kuang <heku...@huawei.com> Acked-by: Namhyung Kim <namhy...@kernel.org> Cc: Alexei Starovoitov <a...@plumgrid.com> Cc: Jiri Olsa <jo...@kernel.org> Cc: Masami Hiramatsu <masami.hiramatsu...@hitachi.com> Cc: Peter Zijlstra <a.p.zijls...@chello.nl> Cc: Steven Rostedt <rost...@goodmis.org> Cc: Wang Nan <wangn...@huawei.com> Cc: Zefan Li <lize...@huawei.com> Cc: pi3or...@163.com Link: http://lkml.kernel.org/r/1440822125-52691-32-git-send-email-wangn...@huawei.com Signed-off-by: Wang Nan <wangn...@huawei.com> Signed-off-by: Arnaldo Carvalho de Melo <a...@redhat.com> --- tools/lib/traceevent/event-parse.c | 56 +++++++++++++++++++++- tools/lib/traceevent/event-parse.h | 1 + .../perf/util/scripting-engines/trace-event-perl.c | 1 + .../util/scripting-engines/trace-event-python.c | 1 + 4 files changed, 57 insertions(+), 2 deletions(-) diff --git a/tools/lib/traceevent/event-parse.c b/tools/lib/traceevent/event-parse.c index 4d88593..1244797 100644 --- a/tools/lib/traceevent/event-parse.c +++ b/tools/lib/traceevent/event-parse.c @@ -848,6 +848,7 @@ static void free_arg(struct print_arg *arg) free(arg->bitmask.bitmask); break; case PRINT_DYNAMIC_ARRAY: + case PRINT_DYNAMIC_ARRAY_LEN: free(arg->dynarray.index); break; case PRINT_OP: @@ -2729,6 +2730,42 @@ process_dynamic_array(struct event_format *event, struct print_arg *arg, char ** } static enum event_type +process_dynamic_array_len(struct event_format *event, struct print_arg *arg, + char **tok) +{ + struct format_field *field; + enum event_type type; + char *token; + + if (read_expect_type(EVENT_ITEM, &token) < 0) + goto out_free; + + arg->type = PRINT_DYNAMIC_ARRAY_LEN; + + /* Find the field */ + field = pevent_find_field(event, token); + if (!field) + goto out_free; + + arg->dynarray.field = field; + arg->dynarray.index = 0; + + 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 enum event_type process_paren(struct event_format *event, struct print_arg *arg, char **tok) { struct print_arg *item_arg; @@ -2975,6 +3012,10 @@ process_function(struct event_format *event, struct print_arg *arg, free_token(token); return process_dynamic_array(event, arg, tok); } + if (strcmp(token, "__get_dynamic_array_len") == 0) { + free_token(token); + return process_dynamic_array_len(event, arg, tok); + } func = find_func_handler(event->pevent, token); if (func) { @@ -3655,14 +3696,25 @@ eval_num_arg(void *data, int size, struct event_format *event, struct print_arg goto out_warning_op; } break; + case PRINT_DYNAMIC_ARRAY_LEN: + offset = pevent_read_number(pevent, + data + arg->dynarray.field->offset, + arg->dynarray.field->size); + /* + * The total allocated length of the dynamic array is + * stored in the top half of the field, and the offset + * is in the bottom half of the 32 bit field. + */ + val = (unsigned long long)(offset >> 16); + break; case PRINT_DYNAMIC_ARRAY: /* Without [], we pass the address to the dynamic data */ offset = pevent_read_number(pevent, data + arg->dynarray.field->offset, arg->dynarray.field->size); /* - * The actual length of the dynamic array is stored - * in the top half of the field, and the offset + * The total allocated length of the dynamic array is + * stored in the top half of the field, and the offset * is in the bottom half of the 32 bit field. */ offset &= 0xffff; diff --git a/tools/lib/traceevent/event-parse.h b/tools/lib/traceevent/event-parse.h index 204befb..6fc83c7 100644 --- a/tools/lib/traceevent/event-parse.h +++ b/tools/lib/traceevent/event-parse.h @@ -294,6 +294,7 @@ enum print_arg_type { PRINT_OP, PRINT_FUNC, PRINT_BITMASK, + PRINT_DYNAMIC_ARRAY_LEN, }; struct print_arg { diff --git a/tools/perf/util/scripting-engines/trace-event-perl.c b/tools/perf/util/scripting-engines/trace-event-perl.c index 1bd593b..544509c 100644 --- a/tools/perf/util/scripting-engines/trace-event-perl.c +++ b/tools/perf/util/scripting-engines/trace-event-perl.c @@ -221,6 +221,7 @@ static void define_event_symbols(struct event_format *event, break; case PRINT_BSTRING: case PRINT_DYNAMIC_ARRAY: + case PRINT_DYNAMIC_ARRAY_LEN: case PRINT_STRING: case PRINT_BITMASK: break; diff --git a/tools/perf/util/scripting-engines/trace-event-python.c b/tools/perf/util/scripting-engines/trace-event-python.c index ace2484..aa9e125 100644 --- a/tools/perf/util/scripting-engines/trace-event-python.c +++ b/tools/perf/util/scripting-engines/trace-event-python.c @@ -251,6 +251,7 @@ static void define_event_symbols(struct event_format *event, /* gcc warns for these? */ case PRINT_BSTRING: case PRINT_DYNAMIC_ARRAY: + case PRINT_DYNAMIC_ARRAY_LEN: case PRINT_FUNC: case PRINT_BITMASK: /* we should warn... */ -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
