test/imports.c

   1 /*
   2 Disallow some imports into and exports from libobjc.A.dylib.
   3
   4 To debug, re-run libobjc's link command with
   5   -Xlinker -dead_strip -Xlinker -why_live -Xlinker SYMBOL_NAME_HERE
   6
   7 Disallowed imports (nm -u):
   8 ___cxa_guard_acquire   (C++ function-scope static initializer)
   9 ___cxa_guard_release   (C++ function-scope static initializer)
  10 ___cxa_atexit          (C++ static destructor)
  11 weak external          (any weak externals, including operators new and delete)
  12
  13 Disallowed exports (nm -U):
  14 __Z*                   (any C++-mangled export)
  15 weak external          (any weak externals, including operators new and delete)
  16
  17 fixme rdar://13354718 should disallow anything from libc++ (i.e. not libc++abi)
  18 */
  19
  20 /*
  21 TEST_BUILD
  22 echo $C{XCRUN} nm -m -arch $C{ARCH} $C{TESTLIB}
  23 $C{XCRUN} nm -u -m -arch $C{ARCH} $C{TESTLIB} | egrep '(weak external| external (___cxa_atexit|___cxa_guard_acquire|___cxa_guard_release))' || true
  24 $C{XCRUN} nm -U -m -arch $C{ARCH} $C{TESTLIB} | egrep '(weak external| external __Z)' || true
  25 $C{COMPILE_C} $DIR/imports.c -o imports.exe
  26 END
  27
  28 TEST_BUILD_OUTPUT
  29 .*libobjc.A.dylib
  30 END
  31  */
  32
  33 #include "test.h"
  34 int main()
  35 {
  36     succeed(__FILE__);
  37 }