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Viewing changes to compiler-rt/lib/interception/interception.h

  • Committer: Package Import Robot
  • Author(s): Sylvestre Ledru
  • Date: 2013-05-27 15:01:57 UTC
  • mfrom: (0.10.1) (0.9.1) (0.8.1) (0.7.1) (0.6.1) (0.5.2)
  • Revision ID: package-import@ubuntu.com-20130527150157-tdkrsjpuvht7v0qx
Tags: 1:3.4~svn182733-1~exp1
http://bugs.debian.org/708677
* New snapshot release (3.4 release)
* Add a symlink of libLLVM-3.4.so.1 to usr/lib/llvm-3.4/lib/libLLVM-3.4.so
    to fix make the llvm-config-3.4 --libdir work (Closes: #708677)
  * Various packages rename to allow co installations:
    * libclang1 => libclang1-3.4
    * libclang1-dbg => libclang1-3.4-dbg
    * libclang-dev => libclang-3.4-dev
    * libclang-common-dev => libclang-common-3.4-dev

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compiler-rt/lib/interception/interception.h
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//      int foo(const char *bar, double baz);
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// You'll need to:
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//      1) define INTERCEPTOR(int, foo, const char *bar, double baz) { ... } in
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//         your source file.
 
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//         your source file. See the notes below for cases when
 
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//         INTERCEPTOR_WITH_SUFFIX(...) should be used instead.
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//      2) Call "INTERCEPT_FUNCTION(foo)" prior to the first call of "foo".
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//         INTERCEPT_FUNCTION(foo) evaluates to "true" iff the function was
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//         intercepted successfully.
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//           but instead you'll have to add
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//           DECLARE_REAL(int, foo, const char *bar, double baz) in your
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//           source file (to define a pointer to overriden function).
 
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//        3. Some Mac functions have symbol variants discriminated by
 
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//           additional suffixes, e.g. _$UNIX2003 (see
 
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//           https://developer.apple.com/library/mac/#releasenotes/Darwin/SymbolVariantsRelNotes/index.html
 
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//           for more details). To intercept such functions you need to use the
 
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//           INTERCEPTOR_WITH_SUFFIX(...) macro.
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// How it works:
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// To replace system functions on Linux we just need to declare functions
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// INTERCEPT_FUNCTION() is effectively a no-op on this system.
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#if defined(__APPLE__)
 
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#include <sys/cdefs.h>  // For __DARWIN_ALIAS_C().
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// Just a pair of pointers.
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struct interpose_substitution {
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  extern "C" \
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  INTERCEPTOR_ATTRIBUTE \
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  ret_type WRAP(func)(__VA_ARGS__)
 
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// We don't need INTERCEPTOR_WITH_SUFFIX on non-Darwin for now.
 
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#define INTERCEPTOR_WITH_SUFFIX(ret_type, func, ...) \
 
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  INTERCEPTOR(ret_type, func, __VA_ARGS__)
 
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#else  // __APPLE__
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#define INTERCEPTOR(ret_type, func, ...) \
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  extern "C" ret_type func(__VA_ARGS__); \
 
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#define INTERCEPTOR_ZZZ(suffix, ret_type, func, ...) \
 
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  extern "C" ret_type func(__VA_ARGS__) suffix; \
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  extern "C" ret_type WRAP(func)(__VA_ARGS__); \
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  INTERPOSER(func); \
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  extern "C" INTERCEPTOR_ATTRIBUTE ret_type WRAP(func)(__VA_ARGS__)
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#define INTERCEPTOR(ret_type, func, ...) \
 
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  INTERCEPTOR_ZZZ(/*no symbol variants*/, ret_type, func, __VA_ARGS__)
 
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#define INTERCEPTOR_WITH_SUFFIX(ret_type, func, ...) \
 
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  INTERCEPTOR_ZZZ(__DARWIN_ALIAS_C(func), ret_type, func, __VA_ARGS__)
 
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// Override |overridee| with |overrider|.
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#define OVERRIDE_FUNCTION(overridee, overrider) \
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  INTERPOSER_2(overridee, WRAP(overrider))