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perf dso: Separate generic code in dso_cache__read 

Move the file specific code in the dso_cache__read function to a
separate file_read function. I'll add BPF specific code in the following
patches.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Acked-by: Song Liu <songliubraving@fb.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stanislav Fomichev <sdf@google.com>
Link: http://lkml.kernel.org/r/20190508132010.14512-3-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Jiri Olsa 2019-05-08 15:20:00 +02:00 committed by Arnaldo Carvalho de Melo
parent 5523769ee1
commit ea5db1bd5a
1 changed files with 27 additions and 21 deletions
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48
tools/perf/util/dso.c
View File

@ -794,6 +794,31 @@ dso_cache__memcpy(struct dso_cache *cache, u64 offset,
return cache_size;
}
static ssize_t file_read(struct dso *dso, struct machine *machine,
u64 offset, char *data)
{
ssize_t ret;
pthread_mutex_lock(&dso__data_open_lock);
/*
* dso->data.fd might be closed if other thread opened another
* file (dso) due to open file limit (RLIMIT_NOFILE).
*/
try_to_open_dso(dso, machine);
if (dso->data.fd < 0) {
dso->data.status = DSO_DATA_STATUS_ERROR;
ret = -errno;
goto out;
}
ret = pread(dso->data.fd, data, DSO__DATA_CACHE_SIZE, offset);
out:
pthread_mutex_unlock(&dso__data_open_lock);
return ret;
}
static ssize_t
dso_cache__read(struct dso *dso, struct machine *machine,
u64 offset, u8 *data, ssize_t size)
@ -803,37 +828,18 @@ dso_cache__read(struct dso *dso, struct machine *machine,
ssize_t ret;
do {
u64 cache_offset;
u64 cache_offset = offset & DSO__DATA_CACHE_MASK;
cache = zalloc(sizeof(*cache) + DSO__DATA_CACHE_SIZE);
if (!cache)
return -ENOMEM;
pthread_mutex_lock(&dso__data_open_lock);
/*
* dso->data.fd might be closed if other thread opened another
* file (dso) due to open file limit (RLIMIT_NOFILE).
*/
try_to_open_dso(dso, machine);
if (dso->data.fd < 0) {
ret = -errno;
dso->data.status = DSO_DATA_STATUS_ERROR;
break;
}
cache_offset = offset & DSO__DATA_CACHE_MASK;
ret = pread(dso->data.fd, cache->data, DSO__DATA_CACHE_SIZE, cache_offset);
if (ret <= 0)
break;
ret = file_read(dso, machine, cache_offset, cache->data);
cache->offset = cache_offset;
cache->size = ret;
} while (0);
pthread_mutex_unlock(&dso__data_open_lock);
if (ret > 0) {
old = dso_cache__insert(dso, cache);