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perf callchain: Add mask into struct regs_dump

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Adding mask info into struct regs_dump to make the registers information
compact.

The mask was always passed along, so logically the mask info fits more
into the struct regs_dump.

Signed-off-by: Jiri Olsa <jolsa@redhat.com>
Acked-by: Jean Pihet <jean.pihet@linaro.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jean Pihet <jean.pihet@linaro.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1389098853-14466-9-git-send-email-jolsa@redhat.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Jiri Olsa 2014-01-07 13:47:25 +01:00 committed by Arnaldo Carvalho de Melo
parent 1cf0382af9
commit 352ea45a72
10 changed files with 32 additions and 37 deletions
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1
tools/perf/arch/x86/tests/dwarf-unwind.c
View File

@ -53,6 +53,7 @@ int test__arch_unwind_sample(struct perf_sample *sample,
perf_regs_load(buf);
regs->abi = PERF_SAMPLE_REGS_ABI;
regs->regs = buf;
regs->mask = PERF_REGS_MASK;
return sample_ustack(sample, thread, buf);
}

1
tools/perf/builtin-inject.c
View File

@ -312,7 +312,6 @@ static int perf_inject__sched_stat(struct perf_tool *tool,
sample_sw.period = sample->period;
sample_sw.time = sample->time;
perf_event__synthesize_sample(event_sw, evsel->attr.sample_type,
evsel->attr.sample_regs_user,
evsel->attr.read_format, &sample_sw,
false);
build_id__mark_dso_hit(tool, event_sw, &sample_sw, evsel, machine);

2
tools/perf/tests/dwarf-unwind.c
View File

@ -72,7 +72,7 @@ static int unwind_thread(struct thread *thread, struct machine *machine)
}
err = unwind__get_entries(unwind_entry, &cnt, machine, thread,
PERF_REGS_MASK, &sample, MAX_STACK);
&sample, MAX_STACK);
if (err)
pr_debug("unwind failed\n");
else if (cnt != MAX_STACK) {

17
tools/perf/tests/sample-parsing.c
View File

@ -22,8 +22,8 @@
} while (0)
static bool samples_same(const struct perf_sample *s1,
const struct perf_sample *s2, u64 type, u64 regs_user,
u64 read_format)
const struct perf_sample *s2,
u64 type, u64 read_format)
{
size_t i;
@ -95,8 +95,9 @@ static bool samples_same(const struct perf_sample *s1,
}
if (type & PERF_SAMPLE_REGS_USER) {
size_t sz = hweight_long(regs_user) * sizeof(u64);
size_t sz = hweight_long(s1->user_regs.mask) * sizeof(u64);
COMP(user_regs.mask);
COMP(user_regs.abi);
if (s1->user_regs.abi &&
(!s1->user_regs.regs || !s2->user_regs.regs ||
@ -174,6 +175,7 @@ static int do_test(u64 sample_type, u64 sample_regs_user, u64 read_format)
.branch_stack = &branch_stack.branch_stack,
.user_regs = {
.abi = PERF_SAMPLE_REGS_ABI_64,
.mask = sample_regs_user,
.regs = user_regs,
},
.user_stack = {
@ -201,8 +203,7 @@ static int do_test(u64 sample_type, u64 sample_regs_user, u64 read_format)
sample.read.one.id = 99;
}
sz = perf_event__sample_event_size(&sample, sample_type,
sample_regs_user, read_format);
sz = perf_event__sample_event_size(&sample, sample_type, read_format);
bufsz = sz + 4096; /* Add a bit for overrun checking */
event = malloc(bufsz);
if (!event) {
@ -215,8 +216,7 @@ static int do_test(u64 sample_type, u64 sample_regs_user, u64 read_format)
event->header.misc = 0;
event->header.size = sz;
err = perf_event__synthesize_sample(event, sample_type,
sample_regs_user, read_format,
err = perf_event__synthesize_sample(event, sample_type, read_format,
&sample, false);
if (err) {
pr_debug("%s failed for sample_type %#"PRIx64", error %d\n",
@ -244,8 +244,7 @@ static int do_test(u64 sample_type, u64 sample_regs_user, u64 read_format)
goto out_free;
}
if (!samples_same(&sample, &sample_out, sample_type,
sample_regs_user, read_format)) {
if (!samples_same(&sample, &sample_out, sample_type, read_format)) {
pr_debug("parsing failed for sample_type %#"PRIx64"\n",
sample_type);
goto out_free;

5
tools/perf/util/event.h
View File

@ -85,6 +85,7 @@ struct sample_event {
struct regs_dump {
u64 abi;
u64 mask;
u64 *regs;
};
@ -259,9 +260,9 @@ int perf_event__preprocess_sample(const union perf_event *event,
const char *perf_event__name(unsigned int id);
size_t perf_event__sample_event_size(const struct perf_sample *sample, u64 type,
u64 sample_regs_user, u64 read_format);
u64 read_format);
int perf_event__synthesize_sample(union perf_event *event, u64 type,
u64 sample_regs_user, u64 read_format,
u64 read_format,
const struct perf_sample *sample,
bool swapped);

13
tools/perf/util/evsel.c
View File

@ -1396,10 +1396,11 @@ int perf_evsel__parse_sample(struct perf_evsel *evsel, union perf_event *event,
array++;
if (data->user_regs.abi) {
u64 regs_user = evsel->attr.sample_regs_user;
u64 mask = evsel->attr.sample_regs_user;
sz = hweight_long(regs_user) * sizeof(u64);
sz = hweight_long(mask) * sizeof(u64);
OVERFLOW_CHECK(array, sz, max_size);
data->user_regs.mask = mask;
data->user_regs.regs = (u64 *)array;
array = (void *)array + sz;
}
@ -1451,7 +1452,7 @@ int perf_evsel__parse_sample(struct perf_evsel *evsel, union perf_event *event,
}
size_t perf_event__sample_event_size(const struct perf_sample *sample, u64 type,
u64 sample_regs_user, u64 read_format)
u64 read_format)
{
size_t sz, result = sizeof(struct sample_event);
@ -1517,7 +1518,7 @@ size_t perf_event__sample_event_size(const struct perf_sample *sample, u64 type,
if (type & PERF_SAMPLE_REGS_USER) {
if (sample->user_regs.abi) {
result += sizeof(u64);
sz = hweight_long(sample_regs_user) * sizeof(u64);
sz = hweight_long(sample->user_regs.mask) * sizeof(u64);
result += sz;
} else {
result += sizeof(u64);
@ -1546,7 +1547,7 @@ size_t perf_event__sample_event_size(const struct perf_sample *sample, u64 type,
}
int perf_event__synthesize_sample(union perf_event *event, u64 type,
u64 sample_regs_user, u64 read_format,
u64 read_format,
const struct perf_sample *sample,
bool swapped)
{
@ -1687,7 +1688,7 @@ int perf_event__synthesize_sample(union perf_event *event, u64 type,
if (type & PERF_SAMPLE_REGS_USER) {
if (sample->user_regs.abi) {
*array++ = sample->user_regs.abi;
sz = hweight_long(sample_regs_user) * sizeof(u64);
sz = hweight_long(sample->user_regs.mask) * sizeof(u64);
memcpy(array, sample->user_regs.regs, sz);
array = (void *)array + sz;
} else {

3
tools/perf/util/machine.c
View File

@ -1383,8 +1383,7 @@ int machine__resolve_callchain(struct machine *machine,
return 0;
return unwind__get_entries(unwind_entry, &callchain_cursor, machine,
thread, evsel->attr.sample_regs_user,
sample, max_stack);
thread, sample, max_stack);
}

5
tools/perf/util/session.c
View File

@ -702,11 +702,12 @@ static void regs_dump__printf(u64 mask, u64 *regs)
}
}
static void regs_user__printf(struct perf_sample *sample, u64 mask)
static void regs_user__printf(struct perf_sample *sample)
{
struct regs_dump *user_regs = &sample->user_regs;
if (user_regs->regs) {
u64 mask = user_regs->mask;
printf("... user regs: mask 0x%" PRIx64 "\n", mask);
regs_dump__printf(mask, user_regs->regs);
}
@ -806,7 +807,7 @@ static void dump_sample(struct perf_evsel *evsel, union perf_event *event,
branch_stack__printf(sample);
if (sample_type & PERF_SAMPLE_REGS_USER)
regs_user__printf(sample, evsel->attr.sample_regs_user);
regs_user__printf(sample);
if (sample_type & PERF_SAMPLE_STACK_USER)
stack_user__printf(&sample->user_stack);

20
tools/perf/util/unwind.c
View File

@ -86,7 +86,6 @@ struct unwind_info {
struct perf_sample *sample;
struct machine *machine;
struct thread *thread;
u64 sample_uregs;
};
#define dw_read(ptr, type, end) ({ \
@ -391,16 +390,16 @@ static int access_dso_mem(struct unwind_info *ui, unw_word_t addr,
return !(size == sizeof(*data));
}
static int reg_value(unw_word_t *valp, struct regs_dump *regs, int id,
u64 sample_regs)
static int reg_value(unw_word_t *valp, struct regs_dump *regs, int id)
{
int i, idx = 0;
u64 mask = regs->mask;
if (!(sample_regs & (1 << id)))
if (!(mask & (1 << id)))
return -EINVAL;
for (i = 0; i < id; i++) {
if (sample_regs & (1 << i))
if (mask & (1 << i))
idx++;
}
@ -424,8 +423,7 @@ static int access_mem(unw_addr_space_t __maybe_unused as,
return 0;
}
ret = reg_value(&start, &ui->sample->user_regs, PERF_REG_SP,
ui->sample_uregs);
ret = reg_value(&start, &ui->sample->user_regs, PERF_REG_SP);
if (ret)
return ret;
@ -475,7 +473,7 @@ static int access_reg(unw_addr_space_t __maybe_unused as,
if (id < 0)
return -EINVAL;
ret = reg_value(valp, &ui->sample->user_regs, id, ui->sample_uregs);
ret = reg_value(valp, &ui->sample->user_regs, id);
if (ret) {
pr_err("unwind: can't read reg %d\n", regnum);
return ret;
@ -572,13 +570,11 @@ static int get_entries(struct unwind_info *ui, unwind_entry_cb_t cb,
int unwind__get_entries(unwind_entry_cb_t cb, void *arg,
struct machine *machine, struct thread *thread,
u64 sample_uregs, struct perf_sample *data,
int max_stack)
struct perf_sample *data, int max_stack)
{
unw_word_t ip;
struct unwind_info ui = {
.sample = data,
.sample_uregs = sample_uregs,
.thread = thread,
.machine = machine,
};
@ -587,7 +583,7 @@ int unwind__get_entries(unwind_entry_cb_t cb, void *arg,
if (!data->user_regs.regs)
return -EINVAL;
ret = reg_value(&ip, &data->user_regs, PERF_REG_IP, sample_uregs);
ret = reg_value(&ip, &data->user_regs, PERF_REG_IP);
if (ret)
return ret;

2
tools/perf/util/unwind.h
View File

@ -17,7 +17,6 @@ typedef int (*unwind_entry_cb_t)(struct unwind_entry *entry, void *arg);
int unwind__get_entries(unwind_entry_cb_t cb, void *arg,
struct machine *machine,
struct thread *thread,
u64 sample_uregs,
struct perf_sample *data, int max_stack);
int unwind__arch_reg_id(int regnum);
#else
@ -26,7 +25,6 @@ unwind__get_entries(unwind_entry_cb_t cb __maybe_unused,
void *arg __maybe_unused,
struct machine *machine __maybe_unused,
struct thread *thread __maybe_unused,
u64 sample_uregs __maybe_unused,
struct perf_sample *data __maybe_unused,
int max_stack __maybe_unused)
{