libbpf: Add errno string to loader debug messages
The return of bpf_prog_load() library call is insufficient, we also need
errno to know what the bpf(2) syscall did.
Bug: 143236645
Change-Id: Id2c543fdb63b1e077278a8b1ede03a21afad74dc
Signed-off-by: Joel Fernandes (Google) <joel@joelfernandes.org>
diff --git a/libbpf_android/Loader.cpp b/libbpf_android/Loader.cpp
index d02ed87..16b4a2a 100644
--- a/libbpf_android/Loader.cpp
+++ b/libbpf_android/Loader.cpp
@@ -524,8 +524,8 @@
fd = bpf_prog_load(cs[i].type, cs[i].name.c_str(), (struct bpf_insn*)cs[i].data.data(),
cs[i].data.size(), license.c_str(), kvers, 0,
log_buf.data(), log_buf.size());
- ALOGD("New bpf core prog_load for %s (%s) returned: %d\n", elfPath, cs[i].name.c_str(),
- fd);
+ ALOGD("bpf_prog_load lib call for %s (%s) returned: %d (%s)\n", elfPath,
+ cs[i].name.c_str(), fd, std::strerror(errno));
if (fd <= 0)
ALOGE("bpf_prog_load: log_buf contents: %s\n", (char *)log_buf.data());