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perf callchain: Add mask into struct regs_dump 

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
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

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 @@ found:
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)
{