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tracing/events: Add 'signed' field to format files 

The sign info used for filters in the kernel is also useful to
applications that process the trace stream.  Add it to the format
files and make it available to userspace.

Signed-off-by: Tom Zanussi <tzanussi@gmail.com>
Acked-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: rostedt@goodmis.org
Cc: lizf@cn.fujitsu.com
Cc: hch@infradead.org
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
LKML-Reference: <1254809398-8078-2-git-send-email-tzanussi@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Tom Zanussi 2009-10-06 01:09:50 -05:00 committed by Ingo Molnar
parent d9b2002c40
commit 26a50744b2
7 changed files with 82 additions and 42 deletions
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15
include/trace/ftrace.h
View File

@ -120,9 +120,10 @@
#undef __field
#define __field(type, item) \
ret = trace_seq_printf(s, "\tfield:" #type " " #item ";\t" \
"offset:%u;\tsize:%u;\n", \
"offset:%u;\tsize:%u;\tsigned:%u;\n", \
(unsigned int)offsetof(typeof(field), item), \
(unsigned int)sizeof(field.item)); \
(unsigned int)sizeof(field.item), \
(unsigned int)is_signed_type(type)); \
if (!ret) \
return 0;
@ -132,19 +133,21 @@
#undef __array
#define __array(type, item, len) \
ret = trace_seq_printf(s, "\tfield:" #type " " #item "[" #len "];\t" \
"offset:%u;\tsize:%u;\n", \
"offset:%u;\tsize:%u;\tsigned:%u;\n", \
(unsigned int)offsetof(typeof(field), item), \
(unsigned int)sizeof(field.item)); \
(unsigned int)sizeof(field.item), \
(unsigned int)is_signed_type(type)); \
if (!ret) \
return 0;
#undef __dynamic_array
#define __dynamic_array(type, item, len) \
ret = trace_seq_printf(s, "\tfield:__data_loc " #type "[] " #item ";\t"\
"offset:%u;\tsize:%u;\n", \
"offset:%u;\tsize:%u;\tsigned:%u;\n", \
(unsigned int)offsetof(typeof(field), \
__data_loc_##item), \
(unsigned int)sizeof(field.__data_loc_##item)); \
(unsigned int)sizeof(field.__data_loc_##item), \
(unsigned int)is_signed_type(type)); \
if (!ret) \
return 0;

15
kernel/trace/ring_buffer.c
View File

@ -397,18 +397,21 @@ int ring_buffer_print_page_header(struct trace_seq *s)
int ret;
ret = trace_seq_printf(s, "\tfield: u64 timestamp;\t"
"offset:0;\tsize:%u;\n",
(unsigned int)sizeof(field.time_stamp));
"offset:0;\tsize:%u;\tsigned:%u;\n",
(unsigned int)sizeof(field.time_stamp),
(unsigned int)is_signed_type(u64));
ret = trace_seq_printf(s, "\tfield: local_t commit;\t"
"offset:%u;\tsize:%u;\n",
"offset:%u;\tsize:%u;\tsigned:%u;\n",
(unsigned int)offsetof(typeof(field), commit),
(unsigned int)sizeof(field.commit));
(unsigned int)sizeof(field.commit),
(unsigned int)is_signed_type(long));
ret = trace_seq_printf(s, "\tfield: char data;\t"
"offset:%u;\tsize:%u;\n",
"offset:%u;\tsize:%u;\tsigned:%u;\n",
(unsigned int)offsetof(typeof(field), data),
(unsigned int)BUF_PAGE_SIZE);
(unsigned int)BUF_PAGE_SIZE,
(unsigned int)is_signed_type(char));
return ret;
}

12
kernel/trace/trace_events.c
View File

@ -507,7 +507,7 @@ extern char *__bad_type_size(void);
#define FIELD(type, name) \
sizeof(type) != sizeof(field.name) ? __bad_type_size() : \
#type, "common_" #name, offsetof(typeof(field), name), \
sizeof(field.name)
sizeof(field.name), is_signed_type(type)
static int trace_write_header(struct trace_seq *s)
{
@ -515,11 +515,11 @@ static int trace_write_header(struct trace_seq *s)
/* struct trace_entry */
return trace_seq_printf(s,
"\tfield:%s %s;\toffset:%zu;\tsize:%zu;\n"
"\tfield:%s %s;\toffset:%zu;\tsize:%zu;\n"
"\tfield:%s %s;\toffset:%zu;\tsize:%zu;\n"
"\tfield:%s %s;\toffset:%zu;\tsize:%zu;\n"
"\tfield:%s %s;\toffset:%zu;\tsize:%zu;\n"
"\tfield:%s %s;\toffset:%zu;\tsize:%zu;\tsigned:%u;\n"
"\tfield:%s %s;\toffset:%zu;\tsize:%zu;\tsigned:%u;\n"
"\tfield:%s %s;\toffset:%zu;\tsize:%zu;\tsigned:%u;\n"
"\tfield:%s %s;\toffset:%zu;\tsize:%zu;\tsigned:%u;\n"
"\tfield:%s %s;\toffset:%zu;\tsize:%zu;\tsigned:%u;\n"
"\n",
FIELD(unsigned short, type),
FIELD(unsigned char, flags),

23
kernel/trace/trace_export.c
View File

@ -66,44 +66,47 @@ static void __used ____ftrace_check_##name(void) \
#undef __field
#define __field(type, item) \
ret = trace_seq_printf(s, "\tfield:" #type " " #item ";\t" \
"offset:%zu;\tsize:%zu;\n", \
"offset:%zu;\tsize:%zu;\tsigned:%u;\n", \
offsetof(typeof(field), item), \
sizeof(field.item)); \
sizeof(field.item), is_signed_type(type)); \
if (!ret) \
return 0;
#undef __field_desc
#define __field_desc(type, container, item) \
ret = trace_seq_printf(s, "\tfield:" #type " " #item ";\t" \
"offset:%zu;\tsize:%zu;\n", \
"offset:%zu;\tsize:%zu;\tsigned:%u;\n", \
offsetof(typeof(field), container.item), \
sizeof(field.container.item)); \
sizeof(field.container.item), \
is_signed_type(type)); \
if (!ret) \
return 0;
#undef __array
#define __array(type, item, len) \
ret = trace_seq_printf(s, "\tfield:" #type " " #item "[" #len "];\t" \
"offset:%zu;\tsize:%zu;\n", \
"offset:%zu;\tsize:%zu;\tsigned:%u;\n", \
offsetof(typeof(field), item), \
sizeof(field.item)); \
sizeof(field.item), is_signed_type(type)); \
if (!ret) \
return 0;
#undef __array_desc
#define __array_desc(type, container, item, len) \
ret = trace_seq_printf(s, "\tfield:" #type " " #item "[" #len "];\t" \
"offset:%zu;\tsize:%zu;\n", \
"offset:%zu;\tsize:%zu;\tsigned:%u;\n", \
offsetof(typeof(field), container.item), \
sizeof(field.container.item)); \
sizeof(field.container.item), \
is_signed_type(type)); \
if (!ret) \
return 0;
#undef __dynamic_array
#define __dynamic_array(type, item) \
ret = trace_seq_printf(s, "\tfield:" #type " " #item ";\t" \
"offset:%zu;\tsize:0;\n", \
offsetof(typeof(field), item)); \
"offset:%zu;\tsize:0;\tsigned:%u;\n", \
offsetof(typeof(field), item), \
is_signed_type(type)); \
if (!ret) \
return 0;

20
kernel/trace/trace_syscalls.c
View File

@ -103,7 +103,8 @@ extern char *__bad_type_size(void);
#define SYSCALL_FIELD(type, name) \
sizeof(type) != sizeof(trace.name) ? \
__bad_type_size() : \
#type, #name, offsetof(typeof(trace), name), sizeof(trace.name)
#type, #name, offsetof(typeof(trace), name), \
sizeof(trace.name), is_signed_type(type)
int syscall_enter_format(struct ftrace_event_call *call, struct trace_seq *s)
{
@ -120,7 +121,8 @@ int syscall_enter_format(struct ftrace_event_call *call, struct trace_seq *s)
if (!entry)
return 0;
ret = trace_seq_printf(s, "\tfield:%s %s;\toffset:%zu;\tsize:%zu;\n",
ret = trace_seq_printf(s, "\tfield:%s %s;\toffset:%zu;\tsize:%zu;"
"\tsigned:%u;\n",
SYSCALL_FIELD(int, nr));
if (!ret)
return 0;
@ -130,8 +132,10 @@ int syscall_enter_format(struct ftrace_event_call *call, struct trace_seq *s)
entry->args[i]);
if (!ret)
return 0;
ret = trace_seq_printf(s, "\toffset:%d;\tsize:%zu;\n", offset,
sizeof(unsigned long));
ret = trace_seq_printf(s, "\toffset:%d;\tsize:%zu;"
"\tsigned:%u;\n", offset,
sizeof(unsigned long),
is_signed_type(unsigned long));
if (!ret)
return 0;
offset += sizeof(unsigned long);
@ -163,8 +167,10 @@ int syscall_exit_format(struct ftrace_event_call *call, struct trace_seq *s)
struct syscall_trace_exit trace;
ret = trace_seq_printf(s,
"\tfield:%s %s;\toffset:%zu;\tsize:%zu;\n"
"\tfield:%s %s;\toffset:%zu;\tsize:%zu;\n",
"\tfield:%s %s;\toffset:%zu;\tsize:%zu;"
"\tsigned:%u;\n"
"\tfield:%s %s;\toffset:%zu;\tsize:%zu;"
"\tsigned:%u;\n",
SYSCALL_FIELD(int, nr),
SYSCALL_FIELD(long, ret));
if (!ret)
@ -212,7 +218,7 @@ int syscall_exit_define_fields(struct ftrace_event_call *call)
if (ret)
return ret;
ret = trace_define_field(call, SYSCALL_FIELD(long, ret), 0,
ret = trace_define_field(call, SYSCALL_FIELD(long, ret),
FILTER_OTHER);
return ret;

24
tools/perf/util/trace-event-parse.c
View File

@ -894,6 +894,21 @@ static int event_read_fields(struct event *event, struct format_field **fields)
field->size = strtoul(token, NULL, 0);
free_token(token);
if (read_expected(EVENT_OP, (char *)";") < 0)
goto fail_expect;
if (read_expected(EVENT_ITEM, (char *)"signed") < 0)
goto fail_expect;
if (read_expected(EVENT_OP, (char *)":") < 0)
goto fail_expect;
if (read_expect_type(EVENT_ITEM, &token))
goto fail;
if (strtoul(token, NULL, 0))
field->flags |= FIELD_IS_SIGNED;
free_token(token);
if (read_expected(EVENT_OP, (char *)";") < 0)
goto fail_expect;
@ -2843,6 +2858,15 @@ static void parse_header_field(char *type,
return;
*size = atoi(token);
free_token(token);
if (read_expected(EVENT_OP, (char *)";") < 0)
return;
if (read_expected(EVENT_ITEM, (char *)"signed") < 0)
return;
if (read_expected(EVENT_OP, (char *)":") < 0)
return;
if (read_expect_type(EVENT_ITEM, &token) < 0)
return;
free_token(token);
if (read_expected(EVENT_OP, (char *)";") < 0)
return;
if (read_expect_type(EVENT_NEWLINE, &token) < 0)

1
tools/perf/util/trace-event.h
View File

@ -26,6 +26,7 @@ enum {
enum format_flags {
FIELD_IS_ARRAY = 1,
FIELD_IS_POINTER = 2,
FIELD_IS_SIGNED = 4,
};
struct format_field {