[SCM] master: Fixes bug #5405.

[tthomas@sourceware.org]

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- Log -----------------------------------------------------------------
commit 99e16d1871d3f7f834bdc8834b747591e01299a5
Author: Teresa Thomas <tthomas@redhat.com>
Date:   Mon Nov 26 18:10:02 2007 -0500

    Fixes bug #5405.
    
    2007-11-26  Teresa Thomas  <tthomas@redhat.com>
    
    	* PointerType.java (toPrint): Return on null ptr.

-----------------------------------------------------------------------

Summary of changes:
 frysk-core/frysk/value/ChangeLog        |    2 ++
 frysk-core/frysk/value/PointerType.java |    6 +++++-
 2 files changed, 7 insertions(+), 1 deletions(-)

First 500 lines of diff:
diff --git a/frysk-core/frysk/value/ChangeLog b/frysk-core/frysk/value/ChangeLog
index 46a2743..151002a 100644
--- a/frysk-core/frysk/value/ChangeLog
+++ b/frysk-core/frysk/value/ChangeLog
@@ -1,5 +1,7 @@
 2007-11-26  Teresa Thomas  <tthomas@redhat.com>
 
+	* PointerType.java (toPrint): Return on null ptr.
+
 	* PointerType.java (slice): New.
 	* TestPointer.java (testCharPointerSlice): New test.
 	
diff --git a/frysk-core/frysk/value/PointerType.java b/frysk-core/frysk/value/PointerType.java
index 6766a1e..9cd1e8b 100644
--- a/frysk-core/frysk/value/PointerType.java
+++ b/frysk-core/frysk/value/PointerType.java
@@ -82,6 +82,9 @@ public class PointerType
 	if (type instanceof CharType) {
 	    // XXX: ByteBuffer.slice wants longs.
 	    long addr = getBigInteger(location).longValue();
+	    // Null pointer
+	    if (addr == 0)
+		return;
 	    writer.print(" \"");
 	    while (true) {
 		Location l = new ByteBufferLocation(memory, addr,
@@ -143,12 +146,13 @@ public class PointerType
 	// Evaluate length and offset of slice.
 	long offset = v.asLong() + i.asLong()*type.getSize();	
 	int len = (int)(j.asLong() - i.asLong() + 1)*type.getSize();	
+	
 	// Create a simple memory location with it.
 	Location loc = PieceLocation.createSimpleLoc
 	               (offset, len, taskMem);
 	
 	/* Determine return type.
-	 * Note: Slicing can give one D or multi-D results 
+	 * Note: Slicing can give one-D or multi-D results 
 	 * depending on the type of value being pointed to.
          */
 	


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