[sanitizer] decrease sanitizer-coverage-block-threshold from 1000 to 500 as another...

[oota-llvm.git] / docs / ExceptionHandling.rst

diff --git a/docs/ExceptionHandling.rst b/docs/ExceptionHandling.rst
index fe6876ad83a792801f5cfe5808a1fa4c04067967..bf93fdaaaf404054c91174ff3593e8c9a9077122 100644 (file)
--- a/docs/ExceptionHandling.rst
+++ b/docs/ExceptionHandling.rst
@@ -77,7 +77,7 @@ representation and a significant restructuring just before code generation.
 
 General information about the Windows x64 exception handling mechanism can be
 found at `MSDN Exception Handling (x64)
-<https://msdn.microsoft.com/en-us/library/1eyas8tf(v=vs.80).aspx>_`.
+<https://msdn.microsoft.com/en-us/library/1eyas8tf(v=vs.80).aspx>`_.
 
 Overview
 --------
@@ -278,9 +278,9 @@ there are no catches or filters that require it to.
   exceptions and throws a third.
 
 When all cleanups are finished, if the exception is not handled by the current
-function, resume unwinding by calling the `resume
-instruction <LangRef.html#i_resume>`_, passing in the result of the
-``landingpad`` instruction for the original landing pad.
+function, resume unwinding by calling the :ref:`resume instruction <i_resume>`,
+passing in the result of the ``landingpad`` instruction for the original
+landing pad.
 
 Throw Filters
 -------------
@@ -442,7 +442,7 @@ Uses of this intrinsic are generated by the C++ front-end.
 
 .. code-block:: llvm
 
-  i8* @llvm.eh.begincatch(i8* %exn)
+  void @llvm.eh.begincatch(i8* %ehptr, i8* %ehobj)
 
 
 This intrinsic marks the beginning of catch handling code within the blocks
@@ -450,11 +450,11 @@ following a ``landingpad`` instruction.  The exact behavior of this function
 depends on the compilation target and the personality function associated
 with the ``landingpad`` instruction.
 
-The argument to this intrinsic is a pointer that was previously extracted from
-the aggregate return value of the ``landingpad`` instruction.  The return
-value of the intrinsic is a pointer to the exception object to be used by the
-catch code.  This pointer is returned as an ``i8*`` value, but the actual type
-of the object will depend on the exception that was thrown.
+The first argument to this intrinsic is a pointer that was previously extracted
+from the aggregate return value of the ``landingpad`` instruction.  The second
+argument to the intrinsic is a pointer to stack space where the exception object
+should be stored. The runtime handles the details of copying the exception
+object into the slot. If the second parameter is null, no copy occurs.
 
 Uses of this intrinsic are generated by the C++ front-end.  Many targets will
 use implementation-specific functions (such as ``__cxa_begin_catch``) instead