# HG changeset patch
# User Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
# Date 1367013851 -7200
# Node ID 0fccad3ce40d36d617c8b85603691b97c88733fe
# Parent  927e0792094bab2126ad2fd781494b7c4b8da8dc
Introduce CompilerDirectives.Unsafe. Mark Frame.getArguments method as unsafe.

diff -r 927e0792094b -r 0fccad3ce40d graal/com.oracle.truffle.api/src/com/oracle/truffle/api/CompilerDirectives.java
--- a/graal/com.oracle.truffle.api/src/com/oracle/truffle/api/CompilerDirectives.java	Fri Apr 26 23:03:09 2013 +0200
+++ b/graal/com.oracle.truffle.api/src/com/oracle/truffle/api/CompilerDirectives.java	Sat Apr 27 00:04:11 2013 +0200
@@ -117,4 +117,13 @@
     @Target({ElementType.FIELD})
     public @interface CompilationFinal {
     }
+
+    /**
+     * Marks methods that are considered unsafe. Wrong usage of those methods can lead to unexpected
+     * behavior including a crash of the runtime. Therefore, special care should be taken.
+     */
+    @Retention(RetentionPolicy.RUNTIME)
+    @Target({ElementType.METHOD})
+    public @interface Unsafe {
+    }
 }
diff -r 927e0792094b -r 0fccad3ce40d graal/com.oracle.truffle.api/src/com/oracle/truffle/api/frame/Frame.java
--- a/graal/com.oracle.truffle.api/src/com/oracle/truffle/api/frame/Frame.java	Fri Apr 26 23:03:09 2013 +0200
+++ b/graal/com.oracle.truffle.api/src/com/oracle/truffle/api/frame/Frame.java	Sat Apr 27 00:04:11 2013 +0200
@@ -45,6 +45,7 @@
      * @param clazz the known type of the arguments object as a compile time constant
      * @return the arguments used when calling this method
      */
+    @CompilerDirectives.Unsafe
     <T extends Arguments> T getArguments(Class<T> clazz);
 
     /**