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-rw-r--r--tools/perf/util/header.c77
1 files changed, 54 insertions, 23 deletions
diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c
index 26441d0e571..369c03648f8 100644
--- a/tools/perf/util/header.c
+++ b/tools/perf/util/header.c
@@ -22,6 +22,7 @@
#include "vdso.h"
#include "strbuf.h"
#include "build-id.h"
+#include "data.h"
static bool no_buildid_cache = false;
@@ -199,9 +200,11 @@ static int write_buildid(char *name, size_t name_len, u8 *build_id,
return write_padded(fd, name, name_len + 1, len);
}
-static int __dsos__write_buildid_table(struct list_head *head, pid_t pid,
- u16 misc, int fd)
+static int __dsos__write_buildid_table(struct list_head *head,
+ struct machine *machine,
+ pid_t pid, u16 misc, int fd)
{
+ char nm[PATH_MAX];
struct dso *pos;
dsos__for_each_with_build_id(pos, head) {
@@ -215,6 +218,10 @@ static int __dsos__write_buildid_table(struct list_head *head, pid_t pid,
if (is_vdso_map(pos->short_name)) {
name = (char *) VDSO__MAP_NAME;
name_len = sizeof(VDSO__MAP_NAME) + 1;
+ } else if (dso__is_kcore(pos)) {
+ machine__mmap_name(machine, nm, sizeof(nm));
+ name = nm;
+ name_len = strlen(nm) + 1;
} else {
name = pos->long_name;
name_len = pos->long_name_len + 1;
@@ -240,10 +247,10 @@ static int machine__write_buildid_table(struct machine *machine, int fd)
umisc = PERF_RECORD_MISC_GUEST_USER;
}
- err = __dsos__write_buildid_table(&machine->kernel_dsos, machine->pid,
- kmisc, fd);
+ err = __dsos__write_buildid_table(&machine->kernel_dsos, machine,
+ machine->pid, kmisc, fd);
if (err == 0)
- err = __dsos__write_buildid_table(&machine->user_dsos,
+ err = __dsos__write_buildid_table(&machine->user_dsos, machine,
machine->pid, umisc, fd);
return err;
}
@@ -375,23 +382,31 @@ out_free:
return err;
}
-static int dso__cache_build_id(struct dso *dso, const char *debugdir)
+static int dso__cache_build_id(struct dso *dso, struct machine *machine,
+ const char *debugdir)
{
bool is_kallsyms = dso->kernel && dso->long_name[0] != '/';
bool is_vdso = is_vdso_map(dso->short_name);
+ char *name = dso->long_name;
+ char nm[PATH_MAX];
- return build_id_cache__add_b(dso->build_id, sizeof(dso->build_id),
- dso->long_name, debugdir,
- is_kallsyms, is_vdso);
+ if (dso__is_kcore(dso)) {
+ is_kallsyms = true;
+ machine__mmap_name(machine, nm, sizeof(nm));
+ name = nm;
+ }
+ return build_id_cache__add_b(dso->build_id, sizeof(dso->build_id), name,
+ debugdir, is_kallsyms, is_vdso);
}
-static int __dsos__cache_build_ids(struct list_head *head, const char *debugdir)
+static int __dsos__cache_build_ids(struct list_head *head,
+ struct machine *machine, const char *debugdir)
{
struct dso *pos;
int err = 0;
dsos__for_each_with_build_id(pos, head)
- if (dso__cache_build_id(pos, debugdir))
+ if (dso__cache_build_id(pos, machine, debugdir))
err = -1;
return err;
@@ -399,8 +414,9 @@ static int __dsos__cache_build_ids(struct list_head *head, const char *debugdir)
static int machine__cache_build_ids(struct machine *machine, const char *debugdir)
{
- int ret = __dsos__cache_build_ids(&machine->kernel_dsos, debugdir);
- ret |= __dsos__cache_build_ids(&machine->user_dsos, debugdir);
+ int ret = __dsos__cache_build_ids(&machine->kernel_dsos, machine,
+ debugdir);
+ ret |= __dsos__cache_build_ids(&machine->user_dsos, machine, debugdir);
return ret;
}
@@ -2174,7 +2190,7 @@ int perf_header__fprintf_info(struct perf_session *session, FILE *fp, bool full)
{
struct header_print_data hd;
struct perf_header *header = &session->header;
- int fd = session->fd;
+ int fd = perf_data_file__fd(session->file);
hd.fp = fp;
hd.full = full;
@@ -2635,7 +2651,8 @@ static int perf_header__read_pipe(struct perf_session *session)
struct perf_header *header = &session->header;
struct perf_pipe_file_header f_header;
- if (perf_file_header__read_pipe(&f_header, header, session->fd,
+ if (perf_file_header__read_pipe(&f_header, header,
+ perf_data_file__fd(session->file),
session->repipe) < 0) {
pr_debug("incompatible file format\n");
return -EINVAL;
@@ -2736,23 +2753,36 @@ static int perf_evlist__prepare_tracepoint_events(struct perf_evlist *evlist,
int perf_session__read_header(struct perf_session *session)
{
+ struct perf_data_file *file = session->file;
struct perf_header *header = &session->header;
struct perf_file_header f_header;
struct perf_file_attr f_attr;
u64 f_id;
int nr_attrs, nr_ids, i, j;
- int fd = session->fd;
+ int fd = perf_data_file__fd(file);
session->evlist = perf_evlist__new();
if (session->evlist == NULL)
return -ENOMEM;
- if (session->fd_pipe)
+ if (perf_data_file__is_pipe(file))
return perf_header__read_pipe(session);
if (perf_file_header__read(&f_header, header, fd) < 0)
return -EINVAL;
+ /*
+ * Sanity check that perf.data was written cleanly; data size is
+ * initialized to 0 and updated only if the on_exit function is run.
+ * If data size is still 0 then the file contains only partial
+ * information. Just warn user and process it as much as it can.
+ */
+ if (f_header.data.size == 0) {
+ pr_warning("WARNING: The %s file's data size field is 0 which is unexpected.\n"
+ "Was the 'perf record' command properly terminated?\n",
+ file->path);
+ }
+
nr_attrs = f_header.attrs.size / f_header.attr_size;
lseek(fd, f_header.attrs.offset, SEEK_SET);
@@ -2767,7 +2797,7 @@ int perf_session__read_header(struct perf_session *session)
perf_event__attr_swap(&f_attr.attr);
tmp = lseek(fd, 0, SEEK_CUR);
- evsel = perf_evsel__new(&f_attr.attr, i);
+ evsel = perf_evsel__new(&f_attr.attr);
if (evsel == NULL)
goto out_delete_evlist;
@@ -2886,7 +2916,7 @@ int perf_event__process_attr(struct perf_tool *tool __maybe_unused,
return -ENOMEM;
}
- evsel = perf_evsel__new(&event->attr.attr, evlist->nr_entries);
+ evsel = perf_evsel__new(&event->attr.attr);
if (evsel == NULL)
return -ENOMEM;
@@ -2963,18 +2993,19 @@ int perf_event__process_tracing_data(struct perf_tool *tool __maybe_unused,
struct perf_session *session)
{
ssize_t size_read, padding, size = event->tracing_data.size;
- off_t offset = lseek(session->fd, 0, SEEK_CUR);
+ int fd = perf_data_file__fd(session->file);
+ off_t offset = lseek(fd, 0, SEEK_CUR);
char buf[BUFSIZ];
/* setup for reading amidst mmap */
- lseek(session->fd, offset + sizeof(struct tracing_data_event),
+ lseek(fd, offset + sizeof(struct tracing_data_event),
SEEK_SET);
- size_read = trace_report(session->fd, &session->pevent,
+ size_read = trace_report(fd, &session->pevent,
session->repipe);
padding = PERF_ALIGN(size_read, sizeof(u64)) - size_read;
- if (readn(session->fd, buf, padding) < 0) {
+ if (readn(fd, buf, padding) < 0) {
pr_err("%s: reading input file", __func__);
return -1;
}
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-20 05:41:49 +0000