[libcxxabi] r228423 - Unwind: replace pure virtual functions with aborts

[Saleem Abdulrasool]

Author: compnerd
Date: Fri Feb  6 12:48:07 2015
New Revision: 228423

URL: http://llvm.org/viewvc/llvm-project?rev=228423&view=rev
Log:
Unwind: replace pure virtual functions with aborts

Convert all pure virtual functions in the UnwindCursor with implementations that
abort.  This is effectively manually replicating the current behaviour, whilst
removing the compiler generated calls to __cxa_pure_virtual, which will abort at
runtime with a message indicating that a pure virtual call was made.

The whitespace changes are the result of executing clang-format over the changed
region.

Modified:
    libcxxabi/trunk/src/Unwind/UnwindCursor.hpp

Modified: libcxxabi/trunk/src/Unwind/UnwindCursor.hpp
URL: http://llvm.org/viewvc/llvm-project/libcxxabi/trunk/src/Unwind/UnwindCursor.hpp?rev=228423&r1=228422&r2=228423&view=diff
==============================================================================
--- libcxxabi/trunk/src/Unwind/UnwindCursor.hpp (original)
+++ libcxxabi/trunk/src/Unwind/UnwindCursor.hpp Fri Feb  6 12:48:07 2015
@@ -366,29 +366,45 @@ private:
 };
 #endif // _LIBUNWIND_SUPPORT_COMPACT_UNWIND
 
-
 class _LIBUNWIND_HIDDEN AbstractUnwindCursor {
 public:
-  virtual             ~AbstractUnwindCursor() {}
-  virtual bool        validReg(int) = 0;
-  virtual unw_word_t  getReg(int) = 0;
-  virtual void        setReg(int, unw_word_t) = 0;
-  virtual bool        validFloatReg(int) = 0;
-  virtual unw_fpreg_t getFloatReg(int) = 0;
-  virtual void        setFloatReg(int, unw_fpreg_t) = 0;
-  virtual int         step() = 0;
-  virtual void        getInfo(unw_proc_info_t *) = 0;
-  virtual void        jumpto() = 0;
-  virtual bool        isSignalFrame() = 0;
-  virtual bool        getFunctionName(char *bf, size_t ln, unw_word_t *off) = 0;
-  virtual void        setInfoBasedOnIPRegister(bool isReturnAddr = false) = 0;
-  virtual const char *getRegisterName(int num) = 0;
+  virtual ~AbstractUnwindCursor() {}
+  virtual bool validReg(int) { _LIBUNWIND_ABORT("validReg not implemented"); }
+  virtual unw_word_t getReg(int) { _LIBUNWIND_ABORT("getReg not implemented"); }
+  virtual void setReg(int, unw_word_t) {
+    _LIBUNWIND_ABORT("setReg not implemented");
+  }
+  virtual bool validFloatReg(int) {
+    _LIBUNWIND_ABORT("validFloatReg not implemented");
+  }
+  virtual unw_fpreg_t getFloatReg(int) {
+    _LIBUNWIND_ABORT("getFloatReg not implemented");
+  }
+  virtual void setFloatReg(int, unw_fpreg_t) {
+    _LIBUNWIND_ABORT("setFloatReg not implemented");
+  }
+  virtual int step() { _LIBUNWIND_ABORT("step not implemented"); }
+  virtual void getInfo(unw_proc_info_t *) {
+    _LIBUNWIND_ABORT("getInfo not implemented");
+  }
+  virtual void jumpto() { _LIBUNWIND_ABORT("jumpto not implemented"); }
+  virtual bool isSignalFrame() {
+    _LIBUNWIND_ABORT("isSignalFrame not implemented");
+  }
+  virtual bool getFunctionName(char *, size_t, unw_word_t *) {
+    _LIBUNWIND_ABORT("getFunctionName not implemented");
+  }
+  virtual void setInfoBasedOnIPRegister(bool = false) {
+    _LIBUNWIND_ABORT("setInfoBasedOnIPRegister not implemented");
+  }
+  virtual const char *getRegisterName(int) {
+    _LIBUNWIND_ABORT("getRegisterName not implemented");
+  }
 #ifdef __arm__
-  virtual void        saveVFPAsX() = 0;
+  virtual void saveVFPAsX() { _LIBUNWIND_ABORT("saveVFPAsX not implemented"); }
 #endif
 };
 
-
 /// UnwindCursor contains all state (including all register values) during
 /// an unwind.  This is normally stack allocated inside a unw_cursor_t.
 template <typename A, typename R>