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authorJosé Bollo <jose.bollo@iot.bzh>2017-09-06 18:15:17 +0200
committerJosé Bollo <jose.bollo@iot.bzh>2017-09-07 10:02:36 +0200
commitc4c474c056cd070706d5a3b0af7845c9493bfdaf (patch)
tree548b381f88dd49a490cb1153d8da09ce1bec5f57
parente2ad3e670ac79f5271ce7273368610d7130ac167 (diff)
afb-api-so: take care of SIGSEGV in dlopendab_4.0.2dab_4.0.1dab/4.0.2dab/4.0.14.0.24.0.1
In some case, dlopen raise a segmentation fault. This commit takes care of this. Change-Id: I6cbe59de2422dafcdf3714d0539b1757511c100b Bug-AGL: SPEC-662 Signed-off-by: José Bollo <jose.bollo@iot.bzh>
-rw-r--r--src/afb-api-so.c35
1 files changed, 32 insertions, 3 deletions
diff --git a/src/afb-api-so.c b/src/afb-api-so.c
index bee5fe80..5a7f29cf 100644
--- a/src/afb-api-so.c
+++ b/src/afb-api-so.c
@@ -28,6 +28,35 @@
#include "afb-api-so-v1.h"
#include "afb-api-so-v2.h"
#include "verbose.h"
+#include "sig-monitor.h"
+
+struct safe_dlopen
+{
+ const char *path;
+ void *handle;
+ int flags;
+};
+
+static void safe_dlopen_cb(int sig, void *closure)
+{
+ struct safe_dlopen *sd = closure;
+ if (!sig)
+ sd->handle = dlopen(sd->path, sd->flags);
+ else {
+ ERROR("dlopen of %s raised signal %s", sd->path, strsignal(sig));
+ sd->handle = NULL;
+ }
+}
+
+static void *safe_dlopen(const char *filename, int flags)
+{
+ struct safe_dlopen sd;
+ sd.path = filename;
+ sd.flags = flags;
+ sd.handle = NULL;
+ sig_monitor(0, safe_dlopen_cb, &sd);
+ return sd.handle;
+}
static int load_binding(const char *path, int force, struct afb_apiset *apiset)
{
@@ -36,7 +65,7 @@ static int load_binding(const char *path, int force, struct afb_apiset *apiset)
// This is a loadable library let's check if it's a binding
rc = -!!force;
- handle = dlopen(path, RTLD_NOW | RTLD_LOCAL);
+ handle = safe_dlopen(path, RTLD_NOW | RTLD_LOCAL);
if (handle == NULL) {
if (force)
ERROR("binding [%s] not loadable: %s", path, dlerror());
@@ -116,9 +145,9 @@ static int adddirs(char path[PATH_MAX], size_t end, struct afb_apiset *apiset)
/* case of directories */
if (dent->d_name[0] == '.') {
if (len == 1)
- continue;
+ continue; /* . */
if (dent->d_name[1] == '.' && len == 2)
- continue;
+ continue; /* .. */
}
memcpy(&path[end], dent->d_name, len+1);
adddirs(path, end+len, apiset);