aboutsummaryrefslogtreecommitdiffstats
path: root/tools
diff options
context:
space:
mode:
Diffstat (limited to 'tools')
-rw-r--r--tools/perf/util/header.c63
-rw-r--r--tools/perf/util/header.h2
-rw-r--r--tools/perf/util/session.c108
-rw-r--r--tools/perf/util/session.h7
4 files changed, 157 insertions, 23 deletions
diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c
index ec96321..b31e0ae 100644
--- a/tools/perf/util/header.c
+++ b/tools/perf/util/header.c
@@ -1,8 +1,10 @@
#include <sys/types.h>
+#include <byteswap.h>
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <linux/list.h>
+#include <linux/kernel.h>
#include "util.h"
#include "header.h"
@@ -464,8 +466,21 @@ static int do_read(int fd, void *buf, size_t size)
return 0;
}
+static int perf_header__getbuffer64(struct perf_header *self,
+ int fd, void *buf, size_t size)
+{
+ if (do_read(fd, buf, size))
+ return -1;
+
+ if (self->needs_swap)
+ mem_bswap_64(buf, size);
+
+ return 0;
+}
+
int perf_header__process_sections(struct perf_header *self, int fd,
int (*process)(struct perf_file_section *self,
+ struct perf_header *ph,
int feat, int fd))
{
struct perf_file_section *feat_sec;
@@ -486,7 +501,7 @@ int perf_header__process_sections(struct perf_header *self, int fd,
lseek(fd, self->data_offset + self->data_size, SEEK_SET);
- if (do_read(fd, feat_sec, sec_size))
+ if (perf_header__getbuffer64(self, fd, feat_sec, sec_size))
goto out_free;
err = 0;
@@ -494,7 +509,7 @@ int perf_header__process_sections(struct perf_header *self, int fd,
if (perf_header__has_feat(self, feat)) {
struct perf_file_section *sec = &feat_sec[idx++];
- err = process(sec, feat, fd);
+ err = process(sec, self, feat, fd);
if (err < 0)
break;
}
@@ -511,10 +526,20 @@ int perf_file_header__read(struct perf_file_header *self,
lseek(fd, 0, SEEK_SET);
if (do_read(fd, self, sizeof(*self)) ||
- self->magic != PERF_MAGIC ||
- self->attr_size != sizeof(struct perf_file_attr))
+ memcmp(&self->magic, __perf_magic, sizeof(self->magic)))
return -1;
+ if (self->attr_size != sizeof(struct perf_file_attr)) {
+ u64 attr_size = bswap_64(self->attr_size);
+
+ if (attr_size != sizeof(struct perf_file_attr))
+ return -1;
+
+ mem_bswap_64(self, offsetof(struct perf_file_header,
+ adds_features));
+ ph->needs_swap = true;
+ }
+
if (self->size != sizeof(*self)) {
/* Support the previous format */
if (self->size == offsetof(typeof(*self), adds_features))
@@ -524,16 +549,28 @@ int perf_file_header__read(struct perf_file_header *self,
}
memcpy(&ph->adds_features, &self->adds_features,
- sizeof(self->adds_features));
+ sizeof(ph->adds_features));
+ /*
+ * FIXME: hack that assumes that if we need swap the perf.data file
+ * may be coming from an arch with a different word-size, ergo different
+ * DEFINE_BITMAP format, investigate more later, but for now its mostly
+ * safe to assume that we have a build-id section. Trace files probably
+ * have several other issues in this realm anyway...
+ */
+ if (ph->needs_swap) {
+ memset(&ph->adds_features, 0, sizeof(ph->adds_features));
+ perf_header__set_feat(ph, HEADER_BUILD_ID);
+ }
ph->event_offset = self->event_types.offset;
- ph->event_size = self->event_types.size;
- ph->data_offset = self->data.offset;
+ ph->event_size = self->event_types.size;
+ ph->data_offset = self->data.offset;
ph->data_size = self->data.size;
return 0;
}
static int perf_file_section__process(struct perf_file_section *self,
+ struct perf_header *ph,
int feat, int fd)
{
if (lseek(fd, self->offset, SEEK_SET) < 0) {
@@ -548,7 +585,7 @@ static int perf_file_section__process(struct perf_file_section *self,
break;
case HEADER_BUILD_ID:
- if (perf_header__read_build_ids(fd, self->offset, self->size))
+ if (perf_header__read_build_ids(ph, fd, self->offset, self->size))
pr_debug("Failed to read buildids, continuing...\n");
break;
default:
@@ -560,7 +597,7 @@ static int perf_file_section__process(struct perf_file_section *self,
int perf_header__read(struct perf_header *self, int fd)
{
- struct perf_file_header f_header;
+ struct perf_file_header f_header;
struct perf_file_attr f_attr;
u64 f_id;
int nr_attrs, nr_ids, i, j;
@@ -577,8 +614,9 @@ int perf_header__read(struct perf_header *self, int fd)
struct perf_header_attr *attr;
off_t tmp;
- if (do_read(fd, &f_attr, sizeof(f_attr)))
+ if (perf_header__getbuffer64(self, fd, &f_attr, sizeof(f_attr)))
goto out_errno;
+
tmp = lseek(fd, 0, SEEK_CUR);
attr = perf_header_attr__new(&f_attr.attr);
@@ -589,7 +627,7 @@ int perf_header__read(struct perf_header *self, int fd)
lseek(fd, f_attr.ids.offset, SEEK_SET);
for (j = 0; j < nr_ids; j++) {
- if (do_read(fd, &f_id, sizeof(f_id)))
+ if (perf_header__getbuffer64(self, fd, &f_id, sizeof(f_id)))
goto out_errno;
if (perf_header_attr__add_id(attr, f_id) < 0) {
@@ -610,7 +648,8 @@ int perf_header__read(struct perf_header *self, int fd)
events = malloc(f_header.event_types.size);
if (events == NULL)
return -ENOMEM;
- if (do_read(fd, events, f_header.event_types.size))
+ if (perf_header__getbuffer64(self, fd, events,
+ f_header.event_types.size))
goto out_errno;
event_count = f_header.event_types.size / sizeof(struct perf_trace_event_type);
}
diff --git a/tools/perf/util/header.h b/tools/perf/util/header.h
index 2b69aab..ccc8540 100644
--- a/tools/perf/util/header.h
+++ b/tools/perf/util/header.h
@@ -52,6 +52,7 @@ struct perf_header {
u64 data_size;
u64 event_offset;
u64 event_size;
+ bool needs_swap;
DECLARE_BITMAP(adds_features, HEADER_FEAT_BITS);
};
@@ -80,6 +81,7 @@ bool perf_header__has_feat(const struct perf_header *self, int feat);
int perf_header__process_sections(struct perf_header *self, int fd,
int (*process)(struct perf_file_section *self,
+ struct perf_header *ph,
int feat, int fd));
#endif /* __PERF_HEADER_H */
diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c
index e3ccdb4..604e14f 100644
--- a/tools/perf/util/session.c
+++ b/tools/perf/util/session.c
@@ -1,5 +1,6 @@
#include <linux/kernel.h>
+#include <byteswap.h>
#include <unistd.h>
#include <sys/types.h>
@@ -201,21 +202,88 @@ void event__print_totals(void)
event__name[i], event__total[i]);
}
+void mem_bswap_64(void *src, int byte_size)
+{
+ u64 *m = src;
+
+ while (byte_size > 0) {
+ *m = bswap_64(*m);
+ byte_size -= sizeof(u64);
+ ++m;
+ }
+}
+
+static void event__all64_swap(event_t *self)
+{
+ struct perf_event_header *hdr = &self->header;
+ mem_bswap_64(hdr + 1, self->header.size - sizeof(*hdr));
+}
+
+static void event__comm_swap(event_t *self)
+{
+ self->comm.pid = bswap_32(self->comm.pid);
+ self->comm.tid = bswap_32(self->comm.tid);
+}
+
+static void event__mmap_swap(event_t *self)
+{
+ self->mmap.pid = bswap_32(self->mmap.pid);
+ self->mmap.tid = bswap_32(self->mmap.tid);
+ self->mmap.start = bswap_64(self->mmap.start);
+ self->mmap.len = bswap_64(self->mmap.len);
+ self->mmap.pgoff = bswap_64(self->mmap.pgoff);
+}
+
+static void event__task_swap(event_t *self)
+{
+ self->fork.pid = bswap_32(self->fork.pid);
+ self->fork.tid = bswap_32(self->fork.tid);
+ self->fork.ppid = bswap_32(self->fork.ppid);
+ self->fork.ptid = bswap_32(self->fork.ptid);
+ self->fork.time = bswap_64(self->fork.time);
+}
+
+static void event__read_swap(event_t *self)
+{
+ self->read.pid = bswap_32(self->read.pid);
+ self->read.tid = bswap_32(self->read.tid);
+ self->read.value = bswap_64(self->read.value);
+ self->read.time_enabled = bswap_64(self->read.time_enabled);
+ self->read.time_running = bswap_64(self->read.time_running);
+ self->read.id = bswap_64(self->read.id);
+}
+
+typedef void (*event__swap_op)(event_t *self);
+
+static event__swap_op event__swap_ops[] = {
+ [PERF_RECORD_MMAP] = event__mmap_swap,
+ [PERF_RECORD_COMM] = event__comm_swap,
+ [PERF_RECORD_FORK] = event__task_swap,
+ [PERF_RECORD_EXIT] = event__task_swap,
+ [PERF_RECORD_LOST] = event__all64_swap,
+ [PERF_RECORD_READ] = event__read_swap,
+ [PERF_RECORD_SAMPLE] = event__all64_swap,
+ [PERF_RECORD_MAX] = NULL,
+};
+
static int perf_session__process_event(struct perf_session *self,
event_t *event,
struct perf_event_ops *ops,
- unsigned long offset, unsigned long head)
+ u64 offset, u64 head)
{
trace_event(event);
if (event->header.type < PERF_RECORD_MAX) {
- dump_printf("%#lx [%#x]: PERF_RECORD_%s",
+ dump_printf("%#Lx [%#x]: PERF_RECORD_%s",
offset + head, event->header.size,
event__name[event->header.type]);
++event__total[0];
++event__total[event->header.type];
}
+ if (self->header.needs_swap && event__swap_ops[event->header.type])
+ event__swap_ops[event->header.type](event);
+
switch (event->header.type) {
case PERF_RECORD_SAMPLE:
return ops->sample(event, self);
@@ -241,7 +309,15 @@ static int perf_session__process_event(struct perf_session *self,
}
}
-int perf_header__read_build_ids(int input, u64 offset, u64 size)
+void perf_event_header__bswap(struct perf_event_header *self)
+{
+ self->type = bswap_32(self->type);
+ self->misc = bswap_16(self->misc);
+ self->size = bswap_16(self->size);
+}
+
+int perf_header__read_build_ids(struct perf_header *self,
+ int input, u64 offset, u64 size)
{
struct build_id_event bev;
char filename[PATH_MAX];
@@ -256,6 +332,9 @@ int perf_header__read_build_ids(int input, u64 offset, u64 size)
if (read(input, &bev, sizeof(bev)) != sizeof(bev))
goto out;
+ if (self->needs_swap)
+ perf_event_header__bswap(&bev.header);
+
len = bev.header.size - sizeof(bev);
if (read(input, filename, len) != len)
goto out;
@@ -292,9 +371,9 @@ static struct thread *perf_session__register_idle_thread(struct perf_session *se
int perf_session__process_events(struct perf_session *self,
struct perf_event_ops *ops)
{
- int err;
- unsigned long head, shift;
- unsigned long offset = 0;
+ int err, mmap_prot, mmap_flags;
+ u64 head, shift;
+ u64 offset = 0;
size_t page_size;
event_t *event;
uint32_t size;
@@ -330,9 +409,16 @@ out_getcwd_err:
offset += shift;
head -= shift;
+ mmap_prot = PROT_READ;
+ mmap_flags = MAP_SHARED;
+
+ if (self->header.needs_swap) {
+ mmap_prot |= PROT_WRITE;
+ mmap_flags = MAP_PRIVATE;
+ }
remap:
- buf = mmap(NULL, page_size * self->mmap_window, PROT_READ,
- MAP_SHARED, self->fd, offset);
+ buf = mmap(NULL, page_size * self->mmap_window, mmap_prot,
+ mmap_flags, self->fd, offset);
if (buf == MAP_FAILED) {
pr_err("failed to mmap file\n");
err = -errno;
@@ -342,6 +428,8 @@ remap:
more:
event = (event_t *)(buf + head);
+ if (self->header.needs_swap)
+ perf_event_header__bswap(&event->header);
size = event->header.size;
if (size == 0)
size = 8;
@@ -361,12 +449,12 @@ more:
size = event->header.size;
- dump_printf("\n%#lx [%#x]: event: %d\n",
+ dump_printf("\n%#Lx [%#x]: event: %d\n",
offset + head, event->header.size, event->header.type);
if (size == 0 ||
perf_session__process_event(self, event, ops, offset, head) < 0) {
- dump_printf("%#lx [%#x]: skipping unknown header type: %d\n",
+ dump_printf("%#Lx [%#x]: skipping unknown header type: %d\n",
offset + head, event->header.size,
event->header.type);
/*
diff --git a/tools/perf/util/session.h b/tools/perf/util/session.h
index d4a9d20..36d1a80 100644
--- a/tools/perf/util/session.h
+++ b/tools/perf/util/session.h
@@ -51,6 +51,8 @@ struct perf_event_ops {
struct perf_session *perf_session__new(const char *filename, int mode, bool force);
void perf_session__delete(struct perf_session *self);
+void perf_event_header__bswap(struct perf_event_header *self);
+
int perf_session__process_events(struct perf_session *self,
struct perf_event_ops *event_ops);
@@ -61,7 +63,8 @@ struct symbol **perf_session__resolve_callchain(struct perf_session *self,
bool perf_session__has_traces(struct perf_session *self, const char *msg);
-int perf_header__read_build_ids(int input, u64 offset, u64 file_size);
+int perf_header__read_build_ids(struct perf_header *self, int input,
+ u64 offset, u64 file_size);
int perf_session__set_kallsyms_ref_reloc_sym(struct perf_session *self,
const char *symbol_name,
@@ -69,4 +72,6 @@ int perf_session__set_kallsyms_ref_reloc_sym(struct perf_session *self,
void perf_session__reloc_vmlinux_maps(struct perf_session *self,
u64 unrelocated_addr);
+void mem_bswap_64(void *src, int byte_size);
+
#endif /* __PERF_SESSION_H */
generated by cgit v1.1 at 2024-12-27 08:34:59 +0000