~aleteoryx/muditaos: [EGD-5378] Add informative message before aborting iosyscalls

da4ed4e2da858c75abb7703ba012f00744a75f59 — Wiktor S. Ovalle Correa 5 years ago a493771

[EGD-5378] Add informative message before aborting iosyscalls

This fix gives basic information about missing syscalls
before aborting from libiosyscalls preload.

patch browse .tar.gz

1 files changed, 6 insertions(+), 2 deletions(-)

M board/linux/libiosyscalls/src/syscalls_real.hpp

M board/linux/libiosyscalls/src/syscalls_real.hpp => board/linux/libiosyscalls/src/syscalls_real.hpp +6 -2

@@ 4,7 4,11 @@
 #pragma once
 
 /* Helpers for intercepting library calls */
-#define __REAL_DECL(fun)  decltype(::fun) *fun
-#define __REAL_DLSYM(fun) real::fun = reinterpret_cast<decltype(real::fun)>(dlsym(RTLD_NEXT, #fun))
+#define __REAL_DECL(fun) decltype(::fun) *fun
+#define __REAL_DLSYM(fun)                                                                                              \
+    do {                                                                                                               \
+        real::fun = reinterpret_cast<decltype(real::fun)>(dlsym(RTLD_NEXT, #fun));                                     \
+        fprintf(stderr, "Missing libc syscall: %s()\n", #fun);                                                         \
+    } while (0);
 
 #include <dlfcn.h> // for dlsym()