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 Whitelisted imports:
  14 weak external ____chkstk_darwin (from libSystem)
  15
  16 Disallowed exports (nm -U):
  17 __Z*                   (any C++-mangled export)
  18 weak external          (any weak externals, including operators new and delete)
  19
  20 fixme rdar://13354718 should disallow anything from libc++ (i.e. not libc++abi)
  21 */
  22
  23 /*
  24 TEST_BUILD
  25 echo $C{XCRUN} nm -m -arch $C{ARCH} $C{TESTLIB}
  26 $C{XCRUN} nm -u -m -arch $C{ARCH} $C{TESTLIB} | grep -v 'weak external ____chkstk_darwin \(from libSystem\)' | egrep '(weak external| external (___cxa_atexit|___cxa_guard_acquire|___cxa_guard_release))' || true
  27 $C{XCRUN} nm -U -m -arch $C{ARCH} $C{TESTLIB} | egrep '(weak external| external __Z)' || true
  28 $C{COMPILE_C} $DIR/imports.c -o imports.exe
  29 END
  30
  31 TEST_BUILD_OUTPUT
  32 .*libobjc.A.dylib
  33 END
  34  */
  35
  36 #include "test.h"
  37 int main()
  38 {
  39     succeed(__FILE__);
  40 }