lkml.org 
[lkml]   [2015]   [Nov]   [3]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 3/5] perf tools: Parsing libbpf return value using err.h
Date
In following patches libbpf would encode error code using return
pointer instead of returnning a NULL pointer to indicate error. This
patch makes a preperation to enable perf correctly receive error code
from libbpf.

Signed-off-by: Wang Nan <wangnan0@huawei.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/tests/llvm.c | 2 +-
tools/perf/util/bpf-loader.c | 8 ++++----
2 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/tools/perf/tests/llvm.c b/tools/perf/tests/llvm.c
index 512d362..38e0d9a 100644
--- a/tools/perf/tests/llvm.c
+++ b/tools/perf/tests/llvm.c
@@ -27,7 +27,7 @@ static int test__bpf_parsing(void *obj_buf, size_t obj_buf_sz)
struct bpf_object *obj;

obj = bpf_object__open_buffer(obj_buf, obj_buf_sz, NULL);
- if (!obj)
+ if (IS_ERR(obj) || !obj)
return -1;
bpf_object__close(obj);
return 0;
diff --git a/tools/perf/util/bpf-loader.c b/tools/perf/util/bpf-loader.c
index 0c5d174..dd6fa27 100644
--- a/tools/perf/util/bpf-loader.c
+++ b/tools/perf/util/bpf-loader.c
@@ -59,9 +59,9 @@ struct bpf_object *bpf__prepare_load(const char *filename, bool source)
} else
obj = bpf_object__open(filename);

- if (!obj) {
+ if (IS_ERR(obj) || !obj) {
pr_debug("bpf: failed to load %s\n", filename);
- return ERR_PTR(-EINVAL);
+ return !obj ? ERR_PTR(-EINVAL) : obj;
}

return obj;
@@ -96,9 +96,9 @@ config_bpf_program(struct bpf_program *prog)
int err;

config_str = bpf_program__title(prog, false);
- if (!config_str) {
+ if (IS_ERR(config_str) || !config_str) {
pr_debug("bpf: unable to get title for program\n");
- return -EINVAL;
+ return !config_str ? -EINVAL : PTR_ERR(config_str);
}

priv = calloc(sizeof(*priv), 1);
--
1.8.3.4


\
 
 \ /
  Last update: 2015-11-03 12:21    [W:1.085 / U:0.392 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site