[ASan] Delete the code related to static runtime on OS X.
Nuke lib/interception/mach_override.
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@174383 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/interception/interception.h b/lib/interception/interception.h
index bff8104..ccebf14 100644
--- a/lib/interception/interception.h
+++ b/lib/interception/interception.h
@@ -30,18 +30,6 @@
typedef __sanitizer::u64 OFF_T;
typedef __sanitizer::u64 OFF64_T;
-// How to use this library:
-// 1) Include this header to define your own interceptors
-// (see details below).
-// 2) Build all *.cc files and link against them.
-// On Mac you will also need to:
-// 3) Provide your own implementation for the following functions:
-// mach_error_t __interception::allocate_island(void **ptr,
-// size_t size,
-// void *hint);
-// mach_error_t __interception::deallocate_island(void *ptr);
-// See "interception_mac.h" for more details.
-
// How to add an interceptor:
// Suppose you need to wrap/replace system function (generally, from libc):
// int foo(const char *bar, double baz);
@@ -82,20 +70,12 @@
// This is not so on Mac OS, where the two-level namespace makes
// our replacement functions invisible to other libraries. This may be overcomed
// using the DYLD_FORCE_FLAT_NAMESPACE, but some errors loading the shared
-// libraries in Chromium were noticed when doing so. Instead we use
-// mach_override, a handy framework for patching functions at runtime.
-// To avoid possible name clashes, our replacement functions have
-// the "wrap_" prefix on Mac.
-// An alternative to function patching is to create a dylib containing a
-// __DATA,__interpose section that associates library functions with their
-// wrappers. When this dylib is preloaded before an executable using
-// DYLD_INSERT_LIBRARIES, it routes all the calls to interposed functions done
-// through stubs to the wrapper functions. Such a library is built with
-// -DMAC_INTERPOSE_FUNCTIONS=1.
-
-#if !defined(MAC_INTERPOSE_FUNCTIONS) || !defined(__APPLE__)
-# define MAC_INTERPOSE_FUNCTIONS 0
-#endif
+// libraries in Chromium were noticed when doing so.
+// Instead we create a dylib containing a __DATA,__interpose section that
+// associates library functions with their wrappers. When this dylib is
+// preloaded before an executable using DYLD_INSERT_LIBRARIES, it routes all
+// the calls to interposed functions done through stubs to the wrapper
+// functions.
#if defined(__APPLE__)
# define WRAP(x) wrap_##x
@@ -122,7 +102,7 @@
__attribute__((weak, alias("__interceptor_" #func), visibility("default")));
#endif
-#if !MAC_INTERPOSE_FUNCTIONS
+#if !defined(__APPLE__)
# define PTR_TO_REAL(x) real_##x
# define REAL(x) __interception::PTR_TO_REAL(x)
# define FUNC_TYPE(x) x##_f
@@ -132,11 +112,11 @@
namespace __interception { \
extern FUNC_TYPE(func) PTR_TO_REAL(func); \
}
-#else // MAC_INTERPOSE_FUNCTIONS
+#else // __APPLE__
# define REAL(x) x
# define DECLARE_REAL(ret_type, func, ...) \
extern "C" ret_type func(__VA_ARGS__);
-#endif // MAC_INTERPOSE_FUNCTIONS
+#endif // __APPLE__
#define DECLARE_REAL_AND_INTERCEPTOR(ret_type, func, ...) \
DECLARE_REAL(ret_type, func, __VA_ARGS__) \
@@ -146,7 +126,7 @@
// macros does its job. In exceptional cases you may need to call REAL(foo)
// without defining INTERCEPTOR(..., foo, ...). For example, if you override
// foo with an interceptor for other function.
-#if !MAC_INTERPOSE_FUNCTIONS
+#if !defined(__APPLE__)
# define DEFINE_REAL(ret_type, func, ...) \
typedef ret_type (*FUNC_TYPE(func))(__VA_ARGS__); \
namespace __interception { \